CN113958478A

CN113958478A - Metering pump

Info

Publication number: CN113958478A
Application number: CN202111271202.6A
Authority: CN
Inventors: 林楚华; 陈贵得
Original assignee: Ningbo Ruigong Automatic Control Equipment Co ltd
Current assignee: Ningbo Ruigong Automatic Control Equipment Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-01-21

Abstract

The invention relates to the technical field of metering pumps, and discloses a metering pump, which comprises: the pump body is provided with a flow inlet and a flow outlet, and a plurality of pump cavities communicated with the flow inlet and the flow outlet are arranged in the pump body along the circumferential direction of the pump body; the driving mechanism comprises a piston assembly and a driving shaft for driving the piston assembly, the piston assembly comprises a turntable and a plurality of pistons hinged on the turntable, and the plurality of pistons are sequentially and movably arranged in the pump cavity; the rotary table is connected with the driving shaft, the rotary table and the driving shaft are eccentrically arranged, and the rotary table can sequentially drive the pistons to do telescopic motion along the pump cavity. The metering pump has the advantages that the metering pump is provided with the rotary disc which is eccentrically arranged with the driving shaft, and the plurality of pistons are respectively arranged in the plurality of pump cavities, so that the rotary disc can sequentially drive the plurality of pistons to do telescopic motion along the pump cavities, namely, the metering of fluid can be realized by controlling the rotating speed of the driving shaft, and the metering effect is good; and the fluid is shunted through the plurality of pump chambers, so that the pumping efficiency is improved.

Description

Metering pump

Technical Field

The invention relates to the technical field of metering pumps, in particular to a metering pump.

Background

Metering pumps are one type of fluid delivery machine that are characterized by the ability to maintain a constant flow rate independent of discharge pressure. The metering pump can simultaneously complete the functions of conveying, metering and adjusting, thereby simplifying the production process flow.

The existing metering pump is generally only provided with a single metering chamber, and fluid is metered after passing through the metering pump, but the fluid flow speed is slow; or a metering pump with a plurality of metering chambers, wherein the metering chambers are easy to interfere with each other, and the metering is inaccurate.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a metering pump with accurate metering and high pumping efficiency.

The technical scheme adopted by the invention for solving the technical problem is to provide a metering pump, which comprises the following components:

the pump body is provided with a flow inlet and a flow outlet, and a plurality of pump cavities communicated with the flow inlet and the flow outlet are arranged in the pump body along the circumferential direction of the pump body;

the driving mechanism comprises a piston assembly and a driving shaft for driving the piston assembly, the piston assembly comprises a rotating disc and a plurality of pistons hinged on the rotating disc, and the plurality of pistons are sequentially and movably arranged in the pump cavity; the carousel with the drive shaft links to each other, just the carousel with the drive shaft is eccentric settings, the carousel can drive a plurality ofly in proper order the piston is followed the pump chamber is concertina movement.

Furthermore, the pump body comprises a main body, one end of the main body is provided with a diversion groove, the other end of the main body is provided with a flow gathering groove, a plurality of inflow through holes communicated with the pump cavity are formed in the diversion groove, and a plurality of outflow through holes communicated with the pump cavity are formed in the flow gathering groove; the inflow through hole, the pump cavity and the outflow through hole are communicated to form a metering channel.

Furthermore, the metering device also comprises a first one-way valve and a second one-way valve, wherein the first one-way valve is arranged in the inflow through hole, the second one-way valve is arranged in the outflow through hole, and the metering channel is a one-way channel.

Furthermore, the diversion groove is arranged along the circumferential direction of the main body, and the flow gathering groove comprises a main groove and a plurality of diversion grooves which are communicated with the main groove and the outflow through holes; and the sub-grooves are arranged around the circumference of the main groove.

The pump body further comprises a first sealing plate and a second sealing plate which are connected to two ends of the main body, the inflow port is formed in the first sealing plate, and the outflow port is formed in the second sealing plate;

and the inflow port is arranged close to the inflow through hole, and the outflow port is arranged close to the main groove.

Furthermore, the pump body is provided with an accommodating cavity and an opening communicated with the accommodating cavity, the turntable is accommodated in the accommodating cavity, and a connecting shaft is arranged on the turntable;

the driving mechanism further comprises a connecting piece, one end of the connecting piece is connected with the connecting shaft, and the driving shaft penetrates through the opening to be connected with the other end of the connecting piece; and the piston passes through the accommodating cavity and is arranged in the pump cavity.

Further, the carousel is gone up and is equipped with a plurality of articulated shafts around the circumference of connecting axle, piston assembly still include a plurality ofly with piston looks articulated connecting rod, the connecting rod is kept away from the one end of piston with the articulated shaft is articulated.

Furthermore, one end of the connecting piece, which is far away from the connecting shaft, is provided with a balancing weight.

Further, the driving mechanism further comprises a fixed seat and a driving motor arranged on the fixed seat, the fixed seat is arranged on the pump body, and an output shaft of the driving motor penetrates through the fixed seat to be connected with the driving shaft.

Furthermore, a first flange interface is arranged on the first sealing plate, and a second flange interface is arranged on the second sealing plate.

Compared with the prior art, the invention has at least the following beneficial effects:

according to the metering pump, the metering pump is used for metering and pumping fluid, after the fluid enters the pump body through the inflow port, metering of a plurality of pump cavities is achieved through matching of the plurality of pump cavities on the pump body and the piston assembly, the plurality of pump cavities are not interfered with one another, the metering efficiency is high, and metering is accurate; the metering pump is provided with a rotary table which is eccentrically arranged with the driving shaft, and a plurality of pistons are respectively arranged in a plurality of pump cavities, so that the rotary table can sequentially drive the plurality of pistons to do telescopic motion along the pump cavities, namely the piston at the farthest end of the driving shaft completes a telescopic motion action firstly, the flow of fluid can be calculated only by controlling the rotating speed of a driving motor, the operation is simple, and the control is convenient; the first one-way valve and the second one-way valve are arranged, so that the fluid flows along the inflow through hole, the pump cavity and the outflow through hole in a one-way manner, and the accuracy of fluid metering is ensured; meanwhile, the flow distribution groove and the flow gathering groove are arranged, so that fluid can enter and be discharged from the pump body conveniently, and the pumping efficiency is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a metering pump according to the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;

FIG. 3 is an exploded view of FIG. 1;

FIG. 4 is a schematic structural view of the main body;

FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective;

FIG. 6 is an exploded view of the drive mechanism and body;

fig. 7 is an exploded view of a part of the structure of the drive mechanism.

In the figure:

1. a pump body; 10. a flow inlet; 11. an outflow port; 12. a pump chamber; 13. a main body; 130. a shunt slot; 131. a collecting chute; 132. an inflow through hole; 133. an outflow through hole; 134. a main tank; 135. dividing the groove; 136. a sealing groove; 14. a first sealing plate; 140. a first flange interface; 15. a second sealing plate; 150. a second flange interface; 16. an accommodating chamber; 17. an opening; 18. a cover plate;

2. a drive mechanism; 20. a piston assembly; 200. a turntable; 201. a piston; 202. a connecting shaft; 203. hinging a shaft; 204. a connecting rod; 21. a drive shaft; 22. a connecting member; 220. a balancing weight; 221. a first slot; 222. a second slot; 23. a fixed seat; 24. a drive motor; 240. an output shaft; 25. and a bearing.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 7, a metering pump includes: the pump body 1 is provided with a flow inlet 10 and a flow outlet 11, and a plurality of pump cavities 12 communicating the flow inlet 10 and the flow outlet 11 are arranged in the pump body 1 around the circumference of the pump body 1, namely the pump cavities 12 are distributed at the edge of the pump body 1; the driving mechanism 2 comprises a piston assembly 20 and a driving shaft 21 for driving the piston assembly 20, the piston assembly 20 comprises a rotating disc 200 and a plurality of pistons 201 hinged on the rotating disc 200, and the plurality of pistons 201 are sequentially and movably arranged in the pump cavity 12; the rotary disc 200 is connected to the driving shaft 21, and the rotary disc 200 is eccentrically disposed with respect to the driving shaft 21, and the rotary disc 200 can sequentially drive the plurality of pistons 201 to perform telescopic movement along the pump chamber 12. Specifically, carousel 200 and drive shaft 21 set up in the middle part of the pump body 1, and carousel 200 is eccentric settings with drive shaft 21 to make a plurality of pistons 201 that are in carousel 200 all around do complete concertina movement in pump chamber 12 in proper order, realize the measurement of a plurality of pump chambers 12, the measurement is efficient, the precision is high.

In this embodiment, the pump body 1 is substantially cylindrical, the pump body 1 includes a main body 13, one end of the main body 13 is provided with a diversion channel 130, the other end of the main body 13 is provided with a flow gathering channel 131, the diversion channel 130 is provided with a plurality of flow inlet through holes 132 communicated with the pump cavity 12, the flow gathering channel 131 is provided with a plurality of flow outlet through holes 133 communicated with the pump cavity 12; the inlet flow bore 132, the pump chamber 12 and the outlet flow bore 133 communicate to form a metering passage. That is, the fluid entering from the inlet 10 flows into the diversion channel 130, the fluid enters the pump chamber 12 along the plurality of inlet through holes 132, and the fluid in the pump chamber 12 flows out along the respective outlet through holes 133, thereby forming a plurality of metering channels.

Specifically, the metering pump further includes a first check valve (not shown) disposed in the inflow through hole 132 and a second check valve (not shown) disposed in the outflow through hole 133, and the metering passage is a one-way passage. The first one-way valve only allows liquid in the diversion channel 130 to enter the pump cavity 12 through the inflow through hole 132, the second one-way valve only allows fluid in the pump cavity 12 to flow out through the outflow through hole 133, and therefore a plurality of one-way metering channels are formed, the metering channels are matched to complete the metering of the fluid, and the accuracy of the metering of the fluid is guaranteed.

As shown in fig. 4 and 5, the dividing groove 130 is disposed along the circumferential direction of the main body 13, the dividing groove 130 is formed by downwardly recessing the upper end surface of the main body 13, and the dividing groove 130 has a plurality of guide channels extending from the center of the main body 13 to the edge side to facilitate the fluid to flow into the inflow through holes 132; the collecting groove 131 includes a main groove 134 and a plurality of sub-grooves 135 communicating the main groove 134 with the outflow through-holes 133, and the sub-grooves 135 are arranged around the circumference of the main groove 134, and the fluid discharged from the pump chamber 12 is collected into the main groove 134 through the respective sub-grooves 135 so as to facilitate the concentrated discharge of the fluid.

Specifically, the pump body 1 further comprises a first sealing plate 14 and a second sealing plate 15 connected to two ends of the main body 13, the inlet 10 is arranged on the first sealing plate 14, and the outlet 11 is arranged on the second sealing plate 15; the inlet 10 is disposed near the inlet hole 132, and the outlet 11 is disposed near the main groove 134, so as to increase the fluid flowing speed.

As shown in fig. 4, 6 and 7, the pump body 1 has an accommodating chamber 16 and an opening 17 communicating with the accommodating chamber 16, a rotary table 200 is accommodated in the accommodating chamber 16, and a connecting shaft 202 is provided on the rotary table 200; the driving mechanism 2 further comprises a connecting piece 22, one end of the connecting piece 22 is connected with the connecting shaft 202, and the driving shaft 21 passes through the opening 17 and is connected with the other end of the connecting piece 22; and the piston 201 is inserted through the receiving chamber 16 into the pump chamber 12, i.e., the piston 201 separates the receiving chamber 16 from the pump chamber 12. One end of the driving shaft 21 penetrates through the outside of the pump body 1 and is used for being connected with external power, a first slot 221 and a second slot 222 are arranged on the connecting piece 22 at intervals, the driving shaft 21 is inserted into the first slot 221, and the connecting shaft 202 is inserted into the second slot 222, so that the rotary disc 200 rotates around the driving shaft 21; and one end of the connecting member 22 away from the connecting shaft 202 is provided with a balancing weight 220, and the balancing weight 220 is used for keeping the rotating smoothness of the driving shaft 21, so that the rotating disc 200 can rotate more smoothly, and the noise is reduced.

In this embodiment, the turntable 200 is provided with a plurality of hinge shafts 203 around the circumference of the connecting shaft 202, the piston assembly 20 further includes a plurality of connecting rods 204 hinged to the piston 201, and one end of the connecting rod 204 away from the piston 201 is hinged to the hinge shafts 203, that is, the piston 201 is hinged to the turntable 200 through the connecting rod 204, so that the piston 201 linearly extends and retracts along the pump chamber 12.

Preferably, the driving mechanism 2 further includes a fixed seat 23 and a driving motor 24 disposed on the fixed seat 23, the fixed seat 23 is disposed on the pump body 1, and an output shaft 240 of the driving motor 24 passes through the fixed seat 23 to be connected with the driving shaft 21, that is, the driving shaft 21 is driven by the driving motor 24, and the driving motor 24 is mounted on the pump body 1 through the fixed seat 23; and a bearing 25 is arranged in the opening 17, and the bearing 25 is sleeved on the driving shaft 21 to ensure that the driving shaft 21 rotates smoothly. When the fluid metering device is used, the pumping speed of the fluid can be changed by only controlling the rotating speed of the driving motor 24, and the metering of the fluid can be completed through the sequential telescopic motion of the plurality of pistons 201 no matter the flow rate of the fluid.

The first sealing plate 14 and the second sealing plate 15 are detachably connected to the upper end face and the lower end face of the main body 13, and the main body 13 is provided with a sealing groove 136, so that sealing rings can be conveniently arranged between the main body 13 and the first sealing plate 14 and between the main body 13 and the second sealing plate 15, and the whole sealing performance of the pump body 1 is ensured; and a detachable cover plate 18 is disposed on the outer side of the main body 13 to facilitate formation of the pump chamber 12, a first flange connector 140 is disposed on the first sealing plate 14, a second flange connector 150 is disposed on the second sealing plate 15, and the first flange connector 140 and the second flange connector 150 are used for connecting with an external pipeline.

The actual working process of the metering pump is as follows: fluid enters the diversion channel 130 in the pump body 1 from the inlet 10 on the first flange interface 140 through an external pipeline, at this time, the driving motor 24 drives the driving shaft 21 to rotate, and further the rotating disc 200 eccentrically arranged with the driving shaft 21 rotates, so that the piston 201 at the farthest end away from the driving shaft 21 is driven to be pulled out first, the pressure in the pump cavity 12 is increased, and the fluid enters the pump cavity 12 through one diversion through hole along the diversion channel 130 under the control of the first one-way valve; the piston 201 is retracted into the pump chamber 12 under the further driving of the rotary disc 200, at this time, the second check valve is opened, so that the fluid in the pump chamber 12 is discharged along the outflow through hole 133 under the pushing of the piston 201, the plurality of pistons 201 perform telescopic motion in sequence, thereby realizing the metering in the fluid pumping process, and the discharged fluid is converged in the main groove 134 through the sub-groove 135, and then is discharged from the outflow port 11 on the second flange connector 150.

In the scheme, the metering pump can meter the fluid (liquid or gas), the fluid is sent into the plurality of metering channels after entering the pump body 1 to form the diversion of the fluid and is metered through the plurality of pump cavities 12, the fluid flows fast, and the metering is accurate.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Claims

1. A metering pump, comprising:

2. The metering pump of claim 1, wherein the pump body comprises a main body, one end of the main body is provided with a flow dividing groove, the other end of the main body is provided with a flow collecting groove, the flow dividing groove is provided with a plurality of inlet through holes communicated with the pump cavity, and the flow collecting groove is provided with a plurality of outlet through holes communicated with the pump cavity; the inflow through hole, the pump cavity and the outflow through hole are communicated to form a metering channel.

3. The metering pump of claim 2, further comprising a first check valve disposed in said inlet flow bore and a second check valve disposed in said outlet flow bore, said metering passage being a one-way passage.

4. The metering pump of claim 2, wherein the branch grooves are arranged along the circumferential direction of the main body, and the flow collecting groove comprises a main groove and a plurality of branch grooves communicating the main groove with the outflow through holes; and the sub-grooves are arranged around the circumference of the main groove.

5. The metering pump of claim 4, wherein the pump body further comprises a first seal plate and a second seal plate connected to opposite ends of the body, the inlet port being provided in the first seal plate and the outlet port being provided in the second seal plate;

6. The metering pump according to claim 1, wherein the pump body has an accommodating chamber and an opening communicating with the accommodating chamber, the turntable is accommodated in the accommodating chamber, and a connecting shaft is provided on the turntable;

7. The metering pump of claim 6 wherein said turntable is provided with a plurality of hinge axes around the circumference of said connecting shaft, said piston assembly further comprising a plurality of connecting rods hinged to said piston, one end of said connecting rods remote from said piston being hinged to said hinge axes.

8. The metering pump of claim 6, wherein a weight is provided at an end of the connecting member remote from the connecting shaft.

9. The metering pump according to claim 1, wherein the driving mechanism further comprises a fixing seat and a driving motor arranged on the fixing seat, the fixing seat is arranged on the pump body, and an output shaft of the driving motor passes through the fixing seat and is connected with the driving shaft.

10. The metering pump of claim 5 wherein the first seal plate is provided with a first flange port and the second seal plate is provided with a second flange port.