METERING PUMP

Abstract

The present invention relates to a metering pump for continuously feeding a predetermined amount of a fluid. The present invention uses a used tire as a compression member 200b including a compression chamber 200a for pumping fluid. Fluid may be continuously pumped in a unit of a predetermined amount by check valves v1 and v2 of a fluid introduction pipe 401 and a fluid discharge pipe connected to the compression chamber 200a by a flexible operation of the compression member 200b by performing a reciprocating motion for a shaft 305 connected to a crank 303 cooperating with a plurality of compression members 200b by a drive motor in an axial direction of the compression member.

Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the invention

[0002] The present invention relates to a metering pump for continuously feeding a predetermined amount of a fluid. More particularly, to a fluid metering pump for dosing-feeding the fluid (waste water) so that coagulant fed in a chemical treatment bath and waste water are mixed with each other having a predetermined ratio in order to remove a sludge contained in the waste water by coagulating the sludge.

[0003] 2. Related Art

[0004] Generally, domestic sewage or industrial wastewater for protecting water quality, waste water such as animal manure is purified with a discharge level or is purified to heavy water so that the purified water may be recycled as water for cleaning a road, wash water for a toilet or water for roadside tree or water for planting trees in a park.

[0005] Various purifying schemes are applied according to the type and pollution extent of pollution sources in order to purify water quality. For example, since contamination concentration of manure is serious, waste water such as livestock manure is after impurities and other contaminants are removed in a physical or chemical method before a process of purifying the waste water, the waste water is purified by steps.

[0006] As described above, in order to remove the sludge contained in the waste water, the sludge is coagulated by feeding a coagulant into a process tub in which the waste water is introduced. In this case, a coagulating efficiency of the sludge may be efficiently expected by suitably adjusting an introduction amount of the coagulant according to an amount of the waste water fed in a chemical treatment bath or according to pollution sources and pollution concentration of the waste water but there is no problem to remove the sludge of a small amount of the waste water. However, it is difficult to rapidly remove the sludge included in large capacity waste water associated with a post process.

[0007] For example, the sludge removal method includes a physical filtering method for feeding a sludge or impurities using a filtering net where a wire is horizontally or vertically woven or filtering the sludge or the impurities and a method of removing the sludge by feeding a drug to coagulate the sludge. The physical filtering method may rapidly remove the sludge or the impurities but a pipe is clogged due to a coagulated sludge so that a sludge coagulating removal method due to the coagulant is widely used.

[0008] However, when an introduction amount of the coagulant is excessive as compared with an amount of the waste water, it is difficult to dehydrate the waste water during an operation of a dehydration device. In contrast, a cohesive force of the sludge becomes weak so that a large amount of the sludge is included in the dehydrated waste water, thereby increasing a processing load in a post waste water treatment process.

[0009] For example, referring to FIG. 1, the waste water introduced into the existing drug treatment tank 3 is overflown in a triangle scheme to be discharged to the dehydration device. In this case, a water level of the drug treatment tank 3 is reduced to a predetermined water level or lower, the feed pump 4 is operated (water level sensor (no reference numeral) in the drug treatment tank 3 so that the waste water stored in a deposition tank 1 is transferred to the drug treatment tank 3. An amount of the waste water introduced into the drug treatment tank 3 in the feed pump 4 is irregular in an operation interval (operation and stop intervals of the feed pump). In FIG. 1, reference numeral 5 represents a dehydration device which separates the waste water in a liquid state from the sludge by dehydrating the coagulated sludge.

[0010] In addition, a water amount irregular phenomenon of the waste water is generated due to a pressure difference according to change in a water level of the waste water introduced into the deposition tank 1. In other words, the deposition tank 1 operating in places such as sewage treatment plant has high capacity wherein a height is in the range of 7 m to 10 m and a length and breadth has 15 m×20 m, a width of water pressure change is very large due to a water level difference.

[0011] Change in a water amount due to water pressure may be solved by equally installing the water level of the deposition tank 1 and the water level of the drug treatment tank 3. However, there is a plurality of cases which cannot be applied to treatment of the waste water, such as a case of transferring underground waste water to the ground or a higher place.

[0012] Since change in water pressure is applied to an inside of the feed pump 4, a head of the pump is changed due to water pressure applied to a pump as well as a head of the pump.

[0013] Since miscellaneous objects including earth and sand, metals such as forks or chopsticks, nails, nuts, screws, toys formed of synthetic resin, a resin rubber household goods such as kitchen containers, bottle caps, packaging of plastic materials, fabrics such as stockings, socks, cans for beverages are introduced in a general deposition tank together with the waste water, a pump for feeding the waste water is excessively worn during driving regardless of the type of a pump.

[0014] That is, internal sealing or impeller, an inner wall between the impeller and a compression chamber, and a surface of a shaft for rotating the impeller are excessively worn due to foreign substances contained in a deposited object, so that head reduction of the pump is generated, and a feed amount of the waste water by a pump according to water pressure of the deposition tank 1 operating in the pump is changed. Accordingly, a mixed ratio of the waste water transferred to the drug treatment tank 3 to a coagulant is abnormal.

[0015] Accordingly, although an abrasion problem and a life shortening problem of the pump due to foreign substances or impurities included in the waste water are inevitably generated, there is a need for a human power to manage a feed amount of the coagulant in order to efficiently coagulate and remove the sludge included in the waste water. If it is considered that automation of a waste water processing device is limited, it is very important to manage a feed amount of the coagulant and a coagulating efficiency of the sludge and the solution thereof is required.

SUMMARY OF THE INVENTION

[0016] The present invention provides a metering pump capable of continuously feeding a fluid having a predetermined amount in a use environment to always uniformly feed a flow rate of waste water into a drug treatment tank which is fed during a drag processing procedure.

[0017] The present invention further provides a metering pump including a used tire capable of reducing generation of garbage and preventing environment pollution by recycling the used tire as a compression member of a pump for pumping fluid.

[0018] a hollow compression member 200b manufactured by a rubber material which has flexibility and restoring ability, and sealing property;

[0019] upper/lower sealing members 204a and 204b coupled with an outer peripheral portion of the compression member 200b to seal a compression chamber 200a;

[0020] a drive motor 300 including a drive shaft 301 axially supported by a support bridge 310 and coupled with a crank 303 and a shaft 305 rotatably connected to the crank 303 and the upper sealing member 204a;

[0021] a fluid feeding pipe 400 including a fluid introduction pipe 401 and a fluid discharge pipe 402 connected to the lower sealing member 204b; and

[0022] check valves v1 and v2 coupled with the fluid introduction pipe and the fluid discharge pipe 402 to open a pipe passage so that fluid flows into or outward from the compression chamber 200a.

[0023] It may be preferable that the compression member may use to reduce generation of garbage and prevent environment pollution

[0024] The present invention may further include a guide part provided between the upper/lower sealing members to improve compression property, flexibility, and restoring ability of the compression member.

[0025] Further, in the present invention, a plurality of compression members are connected to a single drive motor, and the respective compression members sequentially perform a pumping operation with a time difference so that a predetermined amount of the fluid may be fed without purging.

[0026] It is preferable that the check valve v1 is a check valve to introduce the fluid into the compression chamber, and the check value v2 is a check value to open a pipe passage to discharge the fluid introduced into the compression chamber to only an outside of the compression chamber.

Advantageous Effects

[0027] The present invention may feed a predetermined amount of fluid by a sequential pumping operation of a plurality of compression members without surging in the fluid by sequentially operating the compression members by a single drive motor.

[0028] Accordingly, the present invention is significantly advantageous in a technical field to continuously feed a predetermined amount of waste water to be fed to the drug treatment tank in a waste water processing device.

[0029] Further, since the present invention may adopt a used tire as a compression member configuring a compression chamber to reduce environment pollution and an amount of garbage, the present invention makes contribution to industrial development. Increased garbage may be reduced by recycling used tire garbage induced from increased used of a vehicle and an environment pollution problem due to the used tire may be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG. 1 is a layout view illustrating a waste water processor for coagulating a sludge included in waste water using a drug according to the related art;

[0031] FIG. 2 is a partially cut-way sectional view illustrating a basic configuration of a metering pump according to an embodiment of the present invention;

[0032] FIG. 3A is a plan view illustrating a compression chamber of the metering pump according to an embodiment of the invention;

[0033] FIG. 3B is a transverse plan view illustrating a compression chamber of a metering pump according to an embodiment of the invention;

[0034] FIG. 4 is an enlarged sectional view illustrating a metering pump according to an embodiment of the invention;

[0035] FIGS. 5A and 5B are perspective views illustrating a waste water inlet pipe and a waste water outlet pipe connected to a compression chamber of a metering pump according to an embodiment of the invention, respectively;

[0036] FIG. 6 is a partially sectional view illustrating an example of a metering pump according to an embodiment of the invention; and

[0037] FIG. 7 is a side view illustrating a metering pump according to an exemplary embodiment of the invention.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0038] Hereinafter, a metering pump according an embodiment of the present invention will be described with reference to accompanying drawings.

[0039] Referring to FIGS. 2 to 4, FIG. 2 is a partially cut-way sectional view illustrating a basic configuration of a metering pump according to an embodiment of the present invention, FIG. 3A is a plan view illustrating a compression chamber of the metering pump according to an embodiment of the invention, FIG. 3B is a transverse plan view illustrating a compression chamber of a metering pump according to an embodiment of the invention, and FIG. 4 is an enlarged sectional view illustrating a metering pump according to an embodiment of the invention. The metering pump 100 according to the present invention includes a compression member 200b including a compression chamber 200a for pumping waste water, a drive motor 300 for pumping a fluid by driving the compression member 200, and a pipe 400 provided so that a fluid is introduced and discharged into and from the compression member 200.

[0040] The compression member 200b has a ring shaped section and is manufactured by a flexible material such as a rubber to form a compression chamber 200a, and includes upper/lower sealing members 204a and 204b coupled with both peripheral portions 201 of the compression member 200, respectively.

[0041] It is preferable that the compression member 200b includes a rubber material which has flexibility and restoring ability and has relatively excellent abrasion resistance and sealing property.

[0042] In the present invention, as an example of the compression member, as shown in FIG. 3A, FIG. 3B, and FIG. 4, a used tire (not shown) is used.

[0043] The compression member 200b is specially manufactured to have a ring shape which includes flexibility, restoring ability, compression property, and sealing property as well as the used tire, and a description of a method of manufacturing the compression member 200b and a product thereof are omitted.

[0044] However, the used tire may represent a predetermined stiffness by a thread pattern making contact with the ground and an internally inserted steel core (carcass), may have flexibility, compression property, and sealing property to represent basic physical properties of the compression chamber according to fluid pumping. Furthermore, as illustrated in a section of the compression member 200b, the used tire has a hollow space, and the hollow space may be used as the compression chamber 200a. Moreover, since the used tire has more excellent flexibility in an axial direction than a radial direction, if pressure is radially applied to the use tire, an inside of the used tire is contracted. If the pressure is removed, the used tire has excellent restoration force which is restored to an original state. If a pas (hole or a region having a piece) is included in the used tired or the tire is not a used tire where a sealing property (with a hole), the used tire may be used as it is.

[0045] The upper/lower sealing members 204a and 204b are coupled with both peripheral regions of the compression 200b to seal an inside of the compression member 200b. Peripheral regions of the upper/lower sealing members 204a and 204b are coupled with an outer peripheral region of the compression member 200b.

[0046] The upper/lower sealing members 204a and 204b scatter pressure to an outer surface and scatter the pressure applied by a drive motor in a radial direction of the compression member. The upper/lower sealing members 204a and 204b are provided therein with reinforcing members 201a and 201b to maintain a shape of the compression member not to be modified upon compression operation of the compression member 200b and to reinforce stiffness of the compression member.

[0047] Although the upper/lower sealing members 204a and 204b may not include the reinforcing members 201a and 201b, it is preferable that the upper/lower sealing members 204a and 204b are provided therein with the reinforcing members 201a and 201b.

[0048] As shown in FIG. 3A and FIG. 4, the reinforcing member 201a of the upper sealing member 204a is provided therein with a bearing 203 connected to electric power of a drive motor 300 shown in FIG. 2. Waste water feed pipe 400 shown in FIG. 5A and FIG. 5B is connected to the lower sealing member 204b.

[0049] An inside of the compression member 200b maintains a sealing state by coupling the upper/lower sealing members 204a and 204b so that a compression chamber 200a is provided.

[0050] A pipe 400 shown in FIG. 5A represents an introduction pipe 401 where waste water is introduced into the compression member 200b. A pipe 400 shown in FIG. 5B represents a discharge pipe 402 to discharged waste water in the compression member 200b to the outside.

[0051] Referring to FIG. 5A and FIG. 5B, branch pipes 401 a and 402a are connected to a surface of the lower sealing member 204b to be spaced apart from each other at a predetermined angle, and check valves v1 and v2 are coupled with the branch pipes 401a and 402a.

[0052] The check valve v1 is an unidirectional check valve which is coupled with an end of the branch pipe 401 a, and opens a pipe passage so that waste water is introduced into the compression chamber 200a. The check valve v2 is a unidirectional fluid flow control check valve which is coupled with an end of the branch pipe 401a of the discharge pipe 401 and open a pipe passage so that the waste water is discharged to an outside of the compression chamber 200a.

[0053] A guide part 205a may be provided between the upper/lower sealing members 204a and 204b.

[0054] The guide part 205a is advantageous to stably maintain a flexible operation of the compression member 200b upon flexible operation of the compression member 200b.

[0055] In an example of the guide part 205a, as shown in FIG. 4, an alignment shaft 206 having a predetermined length is provided at a bottom surface of the upper sealing member 204a. The guide part 205a may be implemented by providing a guide shaft 207 including a shaft hole 208 for slidably receiving an outer diameter of the alignment shaft 206 at a surface of the lower sealing member 204b and installing a compression spring 205 around the alignment shaft 206 and the guide shaft 207 between the upper/lower sealing members 204a and 204b.

[0056] In FIG. 2 and FIG. 4, reference numeral 208 represents a fixing frame fixed to the ground by a bolt 209 and fixes the lower sealing member 204b so that the lower sealing member 204b is not moved.

[0057] As shown in FIG. 2 and FIG. 6, the above compression member 200b performs a pumping operation according to rotational force of the drive motor 300.

[0058] The drive motor 300 is firmly fixed to a fixed frame 306 by a bolt. A drive shaft of the drive motor is rotatbly supported by a bearing 304 of a support bridge 310 shown in FIG. 2.

[0059] A crank 303 is provided at the above drive shaft 301 and a shaft 305 connected to the bearing 203 is rotably connected to the crank 303.

[0060] Upon rotation of the drive motor 300, the drive shaft and the crank 303 are rotated so that the shaft 305 starts a reciprocating motion upward and downward.

[0061] The shaft 205 performs the reciprocating motion upward and downward to continuously repeat an elevation motion for compressing the upper sealing member 204a and releasing the compression.

[0062] If pressure is changed so that pressure in a compression chamber 200a of the compression member is reduced due to an elevation motion of the upper sealing member 204a, the waste water is introduced into the compression chamber 200a through the branch pipe 401a of the introduction pipe 401. In contrast, when the pressure in the compression chamber 200a is increased, the waste water introduced into the compression chamber is discharged to the discharge pipe 402 through each branch pipe 402a.

[0063] The waste water pumped from the compression chamber by opening an inverse pipe passage of the check valves v1 and v2 coupled with two branch pipes does not reversely flow but a fluid pumping function is performed.

[0064] For the reference, the waste water introduced into the introduction pipe 401 is filtered and removed before impurities and foreign substances having a relative large volume included in the waste water are introduced into the introduction pipe so that an opening/closing function of the pipe passage of the check valves v1 and v2 is not interfered.

[0065] Referring to FIG. 6, FIG. 6 illustrates a metering pump 100 including a pair of compression members 200b. Left and right drive shafts 301 of the drive motor 300 are supported by a support bridge 310. As described above, after a crank 303 is provided at the drive shaft 301, a pumping function of the two compression members 200b may be implemented by driving one drive motor 300 by connecting a shaft 305 between the upper sealing member 204a and the crank 303.

[0066] In this case, a disposal angle of angle crank 303 is connected to the drive shaft 301 (being inverse at 180°) so that the two shafts 305 alternately perform a reciprocating motion.

[0067] In addition, it is preferable that a length of the shaft 305 is adjusted.

[0068] To adjust the length of the shaft 305 is advantageous to adjust a compression range (width) of the compression member 200b, and to adjust a head of a pump.

[0069] Further, introduction pipes 401 of waste water introduced into the two compression members 200b is connected to fluid discharge pipes 402 to which the waste water is discharged to the outside in a compression chamber 200a by pumping operation of the compression members 402 so that the introduction pipes 401 of waste water and fluid discharge pipes 402 are integrated as one.

[0070] Further, a fluid may be continuously pumped according to a sequential pumping function of three compression members by connecting three compression members 200b to a drive shaft 301 of one drive motor 300 and rotating the crank 303 while changing a rotation time difference of angle crank 303.

[0071] Accordingly, a predetermined amount of the fluid pumped by three compression members 200b may be continuously fed without purging. The purging of the fluid may be flexibly controlled by a person having ordinary skill in the art to which the invention pertains if at least three compression members 300b are provided.

[0072] As described above, the technical scope intended from inventors of the present invention has no intention to limit the present invention but is specifically advantageous to feed a predetermined amount of waste water proportional to a feed amount of a coagulant.

[0073] Further, since the metering pump according to the present invention is very simple in a configuration side, when the metering pump is damaged due to abrasion of a compression chamber or fatigue of the compression member, the exchange is easy and it is very cheap to maintain the pump.

[0074] In addition, the present invention may reduce an environment problem due to a used tire garbage being industrial waste and generation of the garbage by manufacturing a pump using a used tire. The metering pump using the used tire may make contributed to industrial development.

Claims

1. A metering pump for feeding fluid comprising: a hollow compression member 200b manufactured by a rubber material which has flexibility and restoring ability, and sealing property; upper/lower sealing members 204a and 204b coupled with an outer peripheral portion of the compression member 200b to seal a compression chamber; a drive motor 300 including a drive shaft 301 axially supported by a support bridge and coupled with a crank 303 and a shaft 305 rotatably connected to the crank and the upper sealing member; a fluid feeding pipe 400 including a fluid introduction pipe 401 and a fluid discharge pipe 402 connected to the lower sealing member 204b; and check valves v1 and v2 coupled with the fluid introduction pipe and the fluid discharge pipe 402 to open a pipe passage so that fluid flows into or outward from the compression chamber 200a.

2. The metering pump of claim 1, wherein the drive motor 300 further comprises an angle crank 303 connected to drive shafts 301 of at least three drive motors to sequentially pump at least three compression members 200b and a shaft 305 connected between the angle crank and the upper sealing member 204a.

3. The metering pump of claim 1, wherein the compression member 200b comprises a used tire.

4. The metering pump of claim 1, wherein the compression member 200b further comprises a guide part 205a.

5. The metering pump of claim 4, wherein the guide part 205a comprises an alignment shaft 206 having a predetermined length attached to a bottom surface of the upper sealing member 204a; a guide shaft 207 coupled with a surface of the lower sealing member 204b and including an axial hole 208 to slidably receive an outer diameter of the alignment shaft 206; and a compression spring 205 coupled around the alignment shaft 206 and the guide shaft 207.

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