CN216691365U

CN216691365U - Metering pump

Info

Publication number: CN216691365U
Application number: CN202123070740.7U
Authority: CN
Inventors: 郗真超; 覃宏荣; 赵多顺
Original assignee: Guangzhou Ascend Precision Machinery Co ltd
Current assignee: Guangzhou Ascend Precision Machinery Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-06-07
Anticipated expiration: 2031-12-07

Abstract

The utility model discloses a metering pump.A pump head is provided with a one-way valve at a liquid inlet and a liquid outlet; the transmission mechanism comprises a sliding assembly, a cam and a cam shaft, one end of the sliding assembly is slidably mounted in the cavity along the left-right direction, the other end of the sliding assembly is slidably mounted in the mounting box along the left-right direction, a mounting space is formed in the mounting box by the sliding assembly, the mounting space is communicated along the up-down direction, the cam shaft penetrates through the mounting space along the up-down direction and is rotatably mounted in the mounting box, and the cam is sleeved in the mounting space by the cam shaft; the motor is installed in the install bin to be used for driving the camshaft rotation, so that the slip subassembly is along left and right direction reciprocating slide. According to the technical scheme, the metering pump can realize non-pulse filling and metering of liquid through the matching of the motor, the sliding assembly, the cam and the one-way valve, the flow of the metering pump is adjusted by the motor, and the precision of liquid flow control is high.

Description

Metering pump

Technical Field

The utility model belongs to the technical field of metering pumps, and particularly relates to a metering pump.

Background

In the production process of products such as batteries, cosmetics, foods, electronic products, biological reagents and the like, a precise metering liquid injection pump is required to be used for metering the fluid in the production processes such as the subpackaging, the filling and the like of the fluid. In the prior art, the instantaneous flow of the metering liquid injection pump not only changes along with time, but also is output in a discontinuous pulse form to form a pulse phenomenon. And when the large-flow filling is carried out, the liquid needs to be discharged for multiple times for metering, the efficiency is relatively low, and the liquid can be splashed when the filling speed is too high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve at least one technical problem in the prior art and provides a metering pump which can realize non-pulsation filling and metering of liquid and has high flow control precision.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a metering pump comprising:

installing a box;

the pump head is arranged on the left side or the right side of the installation box, a cavity communicated with the installation box is arranged on the pump head, a liquid inlet and a liquid outlet communicated with the cavity are formed in the pump head, and one-way valves are arranged at the positions, at which the liquid inlet and the liquid outlet are formed, of the pump head;

the transmission mechanism is positioned in the installation box and comprises a sliding assembly, a cam and a cam shaft, one end of the sliding assembly is slidably installed in the cavity along the left-right direction, the other end of the sliding assembly is slidably installed in the installation box along the left-right direction, an installation space is formed inside the installation box by the sliding assembly, the installation space is communicated along the up-down direction, the cam shaft penetrates through the installation space along the up-down direction and is rotatably installed in the installation box, and the cam is sleeved in the installation space by the cam shaft;

and the motor is arranged on the mounting box and is used for driving the cam shaft to rotate so as to enable the sliding assembly to slide in a reciprocating manner along the left and right directions.

With reference to the foregoing implementation manners, in some implementation manners of the present invention, the pump head is provided with a plurality of cavities at intervals along an up-down direction, the transmission mechanism includes a plurality of sliding assemblies and a plurality of cams sleeved outside the cam shaft at intervals along the up-down direction, one end of each sliding assembly is slidably mounted in the cavity correspondingly along a left-right direction, the other end of each sliding assembly is slidably mounted in the mounting box correspondingly along the left-right direction, and the cams are correspondingly embedded in the mounting space of the sliding assembly.

In some implementations, a liquid inlet converging seat and a liquid outlet converging seat are disposed on the front side and the rear side of the pump head, the liquid inlet converging seat is provided with a liquid inlet converging channel in the vertical direction, each liquid inlet is communicated with the liquid inlet converging channel, the liquid outlet converging seat is provided with a liquid outlet converging channel in the vertical direction, each liquid outlet is communicated with the liquid inlet converging channel, and the liquid inlet converging channel and the liquid outlet converging channel are both communicated with the outside.

With reference to the foregoing implementation manners, in some implementation manners of the present invention, the sliding assembly includes a plunger, a connecting rod, a first connecting assembly and a second connecting assembly, the plunger is slidably mounted in the cavity along a left-right direction, the first connecting assembly is connected to the plunger and abuts against a left side of the cam, the second connecting assembly is slidably mounted in the mounting box along a left-right direction and abuts against a right side of the cam, the connecting rod is connected between the first connecting assembly and the second connecting assembly, the connecting rod is located on front and rear sides of the cam, and a gap is formed between the connecting rod and the cam.

With reference to the foregoing implementation manners, in some implementation manners of the present invention, each of the first connecting assembly and the second connecting assembly includes a rotating shaft and a rotating member, the rotating member is disposed along an up-down direction, the rotating member is sleeved outside the rotating shaft, and the rotating member abuts against the cam.

With reference to the foregoing implementation manners, in some implementation manners of the present invention, the first connecting assembly and the second connecting assembly are both provided with grooves at left and right sides of the cam, the rotating member includes a bearing, the bearing is embedded in the groove, and the rotating shaft passes through the groove and is rotatably connected with the bearing.

In some implementations, the liquid inlet and the liquid outlet are oppositely disposed at the front side and the rear side of the cavity, the pump head is provided with a first annular groove communicated with the periphery of the cavity, the first annular groove is located between the liquid inlet and the mounting box along the left-right direction, the pump head is provided with an annular mounting member in the first annular groove, one end of the annular mounting member away from the mounting box is provided with a second annular groove, and the annular mounting member is provided with a first sealing ring in the second annular groove.

In combination with the above implementations, in some implementations of the utility model, the annular mounting member has a third annular groove on an inner periphery thereof, the third annular groove having a second seal ring disposed therein.

In some implementations, the liquid inlet converging seat is provided with a liquid inlet joint communicated with the liquid inlet converging channel, and the liquid outlet converging seat is provided with a liquid outlet joint communicated with the liquid outlet converging channel.

In some implementation manners of the present invention, the bottom of the mounting box and the bottom of the pump head are provided with supporting legs, and the left and right sides of the mounting box are further provided with handles.

One of the above technical solutions has at least one of the following advantages or beneficial effects: when the cam is in work, the motor drives the cam shaft to rotate, and the cam is driven by the cam shaft to rotate along with the cam shaft. In the rotating process of the cam, the distance between the outer edge of the cam and the central shaft of the cam shaft in the left-right direction is changed constantly, so that the cam can drive the sliding assembly to reciprocate in the left-right direction in the rotating process. When the motor rotates and drives the sliding assembly to slide rightwards, the liquid inlet absorbs liquid under the action of the one-way valve, and the liquid flows into the cavity; when the motor rotates and drives the sliding assembly to slide leftwards, liquid discharge is realized by the liquid outlet under the action of the one-way valve, liquid stably flows out from the cavity through the liquid outlet without pulsation, liquid conveying is realized, and the motor stops rotating after a set value is reached. According to the technical scheme, the metering pump can realize non-pulse filling and metering of liquid through the matching of the motor, the sliding assembly, the cam and the one-way valve, the flow of the metering pump is adjusted by the motor, and the precision of liquid flow control is high.

Drawings

The utility model will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic isometric view of one embodiment of the present invention;

FIG. 2 is a top view of one embodiment shown in FIG. 1;

FIG. 3 is a cross-sectional view at C-C of FIG. 2;

FIG. 4 is a side view of one embodiment shown in FIG. 1;

FIG. 5 is a cross-sectional view taken at D-D of FIG. 4;

fig. 6 is a cross-sectional view at E-E in fig. 4.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the present invention, if directions (up, down, left, right, front, and rear) are described, it is only for convenience of describing the technical solution of the present invention, and it is not intended or implied that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, it is not to be construed as limiting the present invention.

In the utility model, the meaning of "a plurality" is one or more, the meaning of "a plurality" is more than two, and the terms of "more than", "less than", "more than" and the like are understood to exclude the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the present invention, unless otherwise specifically limited, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.

Referring to fig. 1, 4 and 5, an embodiment of the present invention provides a metering pump, including an installation box 1, a pump head 2, a transmission mechanism and a motor 3, wherein the pump head 2 is disposed on the left side or the right side of the installation box 1, the pump head 2 is provided with a cavity 21 communicated with the installation box 1, the pump head 2 is provided with a liquid inlet 22 and a liquid outlet 23 communicated with the cavity 21, and the pump head 2 is provided with a check valve 4 at the liquid inlet 22 and the liquid outlet 23.

Referring to fig. 2 and 3, a transmission mechanism is located in the installation box 1, the transmission mechanism includes a sliding assembly, a cam 51 and a cam shaft 52, one end of the sliding assembly is slidably installed in the cavity 21 along the left-right direction, and the other end of the sliding assembly is slidably installed in the installation box 1 along the left-right direction, that is, the sliding assembly is slidably installed in the cavity 21 and the installation box 1 along the left-right direction. The slide module has an installation space 53 formed inside the installation case 1, and the installation space 53 communicates in the vertical direction. The cam shaft 52 passes through the mounting space 53 in the vertical direction and is rotatably mounted on the mounting box 1, and the cam shaft 52 is sleeved with the cam 51 in the mounting space 53 to ensure that the cam 51 can abut against the sliding component in the left-right direction, that is, the cam 51 can abut against the sliding component from the left side and the right side. The motor 3 is mounted to the mounting case 1 and is used to drive the cam shaft 52 to rotate so as to slide the slide assembly reciprocally in the left-right direction.

In operation, the motor 3 drives the cam shaft 52 to rotate, and the cam 51 is driven by the cam shaft 52 to rotate therewith. In the rotating process of the cam 51, since the distance between the outer edge of the cam 51 and the central axis of the cam shaft 52 is constantly changed in the left-right direction, the cam 51 can drive the sliding assembly to reciprocate in the left-right direction in the rotating process. Specifically, when the motor 3 rotates and drives the sliding assembly to slide rightwards, the liquid inlet 22 absorbs liquid under the action of the one-way valve 4, and the liquid flows into the cavity 21; when the motor 3 rotates and drives the sliding assembly to slide leftwards, liquid discharge is realized by the liquid outlet 23 under the action of the one-way valve 4, liquid stably flows out from the cavity 21 through the liquid outlet 23 without pulsation, liquid conveying is realized, and the motor 3 stops rotating after a set value is reached. According to the metering pump of the technical scheme, the motor 3, the sliding assembly, the cam 51 and the one-way valve 4 are matched, so that the non-pulsating filling and metering of liquid can be realized, the flow of the metering pump is adjusted by the motor 3, and the precision of the flow control of the liquid is high.

Further, referring to fig. 3 and 6, the pump head 2 is provided with a plurality of cavities 21 at intervals along the up-down direction, and each cavity 21 is communicated with a liquid inlet 22 and a liquid outlet 23. The transmission mechanism comprises a plurality of sliding assemblies and a plurality of cams 51 which are sleeved outside the cam shaft 52 at intervals along the vertical direction, one ends of the sliding assemblies are correspondingly slidably mounted in the cavity 21 along the left-right direction, the other ends of the sliding assemblies are correspondingly slidably mounted in the mounting box 1 along the left-right direction, and the cams 51 are correspondingly embedded in the mounting spaces 53 of the sliding assemblies. Through setting up multiunit slip subassembly and cam 51, can satisfy large-traffic filling demand, realize once only accomplishing the filling, work efficiency is high, avoids appearing liquid and splashes or go out drawbacks such as liquid measurement many times.

It is understood that the number of the sliding assemblies and the cams 51 can be reasonably set to 2, 3 or 4 according to practical situations, and is not limited in particular. Each cam 51 is arranged outside the cam shaft 52 according to a specific position, and the liquid amount pumped out by the metering pump is kept consistent every time the motor 3 rotates at the same angle, so that the effect of constant-flow liquid discharging is achieved. Wherein, the installation position of each cam 51 can be rationally set according to the actual liquid output demand.

Further, referring to fig. 1, 2, 5 and 6, the pump head 2 is provided with a liquid inlet manifold 24 and a liquid outlet manifold 25 on the front and rear sides, the liquid inlet manifold 24 is provided with a liquid inlet channel 241 along the vertical direction, and each liquid inlet 22 is communicated with the liquid inlet channel 241. The liquid outlet converging seat 25 is provided with a liquid outlet converging channel 251 along the up-down direction, each liquid outlet 23 is communicated with the liquid inlet converging channel 241, the liquid inlet converging channel 241 and the liquid outlet converging channel 251 are communicated with the outside, so that liquid inlet is realized through the liquid inlet converging channel 241, and liquid outlet is realized through the liquid outlet converging channel 251.

Further, referring to fig. 1, fig. 2, fig. 5 and fig. 6, the liquid inlet manifold 24 is provided with a liquid inlet joint 242 communicated with the liquid inlet manifold channel 241, the liquid outlet manifold 25 is provided with a liquid outlet joint 252 communicated with the liquid outlet manifold channel 251, and the liquid inlet joint 242 and the liquid outlet joint 252 are arranged to facilitate quick connection.

Referring to fig. 3, 5 and 6, in some embodiments, the sliding assembly includes a plunger 61, a link 62, a first connecting assembly 63 and a second connecting assembly 64, the plunger 61 is slidably mounted in the cavity 21 in the left-right direction, and the first connecting assembly 63 is connected to the plunger 61 and abuts against the left side of the cam 51. The second connecting component 64 is slidably mounted on the mounting box 1 in the left-right direction and abuts against the right side of the cam 51, the connecting rod 62 is connected between the first connecting component 63 and the second connecting component 64, the connecting rod 62 is located on the front side and the rear side of the cam 51, and a gap is formed between the connecting rod 62 and the cam 51, so that the cam 51 can act on the first connecting component 63 and the second connecting component 64 in the left-right direction to drive the plunger 61 to slide leftwards or rightwards. That is, the mounting space 53 is formed between the first and second connecting

members

63 and 64 and the link 62.

Further, with reference to fig. 3 and 5, the first connecting assembly 63 and the second connecting assembly 64 each include a rotating shaft 651 and a rotating member 652 disposed along the vertical direction, the rotating member 652 is sleeved outside the rotating shaft 651, and the rotating member 652 abuts against the cam 51, so as to reduce friction among the first connecting assembly 63, the second connecting assembly 64, and the cam 51, and improve the service life of the device.

Referring to fig. 3 and 5, in some embodiments, the first connecting member 63 and the second connecting member 64 are each provided with a groove (not shown) at left and right sides of the cam 51, the rotating member 652 includes a bearing, the bearing is inserted into the groove, and the rotating shaft 651 passes through the groove and is rotatably coupled to the bearing. The bearing can reduce friction and play a supporting role, so that the stability of the first connecting assembly 63 and the second connecting assembly 64 is improved.

It is understood that the liquid inlet 22 and the liquid outlet 23 may be disposed on two opposite sides of the cavity 21, or alternatively, may be disposed on the same side of the cavity 21 in a staggered manner. Referring to fig. 3 and 5, in some embodiments, the liquid inlet 22 and the liquid outlet 23 are disposed at the front and rear sides of the cavity 21, and the pump head 2 is provided with a first annular groove (not shown) at the periphery of the cavity 21, the first annular groove being located between the liquid inlet 22 and the mounting case 1 along the left-right direction. The pump head 2 is provided with an annular mounting member 7 in the first annular groove, the annular mounting member 7 is provided with a second annular groove (not shown) at an end far away from the mounting box 1, and the annular mounting member 7 is provided with a first sealing ring 71 in the second annular groove to perform an end face sealing function.

Further, referring to fig. 3 and 5, the annular mounting member 7 is provided with a third annular groove (not shown) on the inner periphery thereof, and a second sealing ring 72 is provided in the third annular groove, so that the plunger 61 can be kept in a sealed state with the annular mounting member 7 during the movement process, and the liquid is prevented from flowing into the mounting box 1 through the cavity 21, which affects the filling and metering effects.

Referring to fig. 1, 3, 4 and 6, in some embodiments, the bottom of the mounting box 1 and the bottom of the pump head 2 are provided with support legs 81 for supporting. Handles 82 are arranged on the left side and the right side of the installation box 1, and the installation box is convenient to transfer and use.

In the description herein, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The utility model is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the utility model, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims

1. A metering pump, comprising:

installing a box;

2. The metering pump of claim 1, wherein a plurality of said cavities are spaced from each other in the up-down direction of said pump head, said driving mechanism comprises a plurality of said sliding assemblies and a plurality of said cams which are spaced from each other in the up-down direction and are disposed outside said cam shaft, one end of said sliding assembly is slidably mounted in said cavities correspondingly in the left-right direction, the other end of said sliding assembly is slidably mounted in said mounting box correspondingly in the left-right direction, and said cams are correspondingly inserted in said mounting space of said sliding assembly.

3. The metering pump of claim 2, wherein the pump head is provided with a liquid inlet manifold and a liquid outlet manifold at the front and the back sides thereof, the liquid inlet manifold is provided with a liquid inlet channel in the vertical direction, each liquid inlet is communicated with the liquid inlet manifold, the liquid outlet manifold is provided with a liquid outlet channel in the vertical direction, each liquid outlet is communicated with the liquid inlet manifold, and the liquid inlet manifold and the liquid outlet manifold are communicated with the outside.

4. The metering pump of any one of claims 1 to 3, wherein the sliding assembly comprises a plunger, a connecting rod, a first connecting assembly and a second connecting assembly, the plunger is slidably mounted in the cavity in the left-right direction, the first connecting assembly is connected with the plunger and abuts against the left side of the cam, the second connecting assembly is slidably mounted in the mounting box in the left-right direction and abuts against the right side of the cam, the connecting rod is connected between the first connecting assembly and the second connecting assembly and is positioned at the front side and the rear side of the cam, and a gap is formed between the connecting rod and the cam.

5. The metering pump of claim 4, wherein the first connecting assembly and the second connecting assembly each comprise a rotating shaft and a rotating member arranged in an up-down direction, the rotating member is sleeved outside the rotating shaft, and the rotating member abuts against the cam.

6. The metering pump of claim 5, wherein the first connecting assembly and the second connecting assembly are each provided with a groove on both left and right sides of the cam, the rotating member includes a bearing, the bearing is embedded in the groove, and the rotating shaft passes through the groove and is rotatably connected with the bearing.

7. The metering pump of claim 4, wherein the liquid inlet and the liquid outlet are oppositely disposed on the front and rear sides of the cavity, the pump head is provided with a first annular groove communicated with the outer periphery of the cavity, the first annular groove is located between the liquid inlet and the mounting box along the left-right direction, the pump head is provided with an annular mounting member in the first annular groove, the annular mounting member is provided with a second annular groove at an end far away from the mounting box, and the annular mounting member is provided with a first sealing ring in the second annular groove.

8. The metering pump of claim 7 wherein said annular mounting member is provided with a third annular groove on an inner periphery, said third annular groove having a second seal ring disposed therein.

9. The metering pump of claim 3 wherein said inlet manifold is provided with an inlet fitting in communication with said inlet manifold and said outlet manifold is provided with an outlet fitting in communication with said outlet manifold.

10. The metering pump of claim 1, wherein supporting legs are arranged at the bottom of the mounting box and the bottom of the pump head, and handles are arranged on the left side and the right side of the mounting box.