Electromagnetic drive diaphragm type plunger metering pump

Abstract

The utility model discloses an electromagnetically driven diaphragm type plunger metering pump, which relates to the technical field of metering pumps, and has the technical scheme that the electromagnetically driven diaphragm type plunger metering pump comprises a valve body and a pump body, the valve body is connected with the pump body through a connecting seat, a diaphragm is arranged between the valve body and the connecting seat, one end of the connecting seat facing the pump body is provided with a circulating groove, and the circulating groove is communicated with the pump body. A flow equalizing plate is fixedly connected into the end, facing the valve body, of the connecting base, the diaphragm covers the flow equalizing plate, a plurality of flow equalizing grooves distributed in an array mode are formed in the face, away from the circulating groove, of the flow equalizing plate, and the circulating groove is communicated with the flow equalizing grooves at the same time. By means of the structure, when the metering pump works, pressure can be applied to the diaphragm in a hydraulic mode, the pressure applied to the diaphragm is prevented from being concentrated in the center of the diaphragm as much as possible, and therefore the diaphragm is prevented from being excessively deformed and even damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, and more specifically, to an electromagnetically driven diaphragm plunger metering pump. Background Art

[0002] A metering pump is a special positive displacement pump that can measure the fluid being transported. It can accurately control the flow rate of the fluid. An electromagnetic diaphragm metering pump is a type of metering pump. It is driven by an electromagnet and is designed for transporting small flow and low pressure fluids. It has the advantages of simple structure, easy control, low energy consumption, accurate metering, and convenient adjustment.

[0003] In the prior art, the currently commonly used electromagnetic metering pump provides thrust through an electromagnetic connecting rod, and its push rod adopts a point contact method with the diaphragm membrane. During long-term force and reciprocating motion, the diaphragm diaphragm in the pump chamber is prone to deformation or even damage due to the uneven extrusion pressure on the surface, resulting in a shortened service life.

[0004] Therefore, it is necessary to provide an electromagnetically driven diaphragm plunger metering pump to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an electromagnetically driven diaphragm plunger metering pump to solve the problems raised in the above background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] An electromagnetically driven diaphragm plunger metering pump comprises a valve body and a pump body, wherein the valve body is connected to the pump body via a connecting seat, a diaphragm is arranged between the valve body and the connecting seat, a flow groove is arranged at one end of the connecting seat facing the pump body, a flow equalizing plate is fixedly connected to the inner side of the end of the connecting seat facing the valve body, the diaphragm covers the flow equalizing plate, and a plurality of flow equalizing grooves distributed in an array are arranged on a surface of the flow equalizing plate away from the flow groove, and the flow groove is simultaneously connected to the plurality of flow equalizing grooves.

[0008] The technical solution of the utility model is further configured as follows: a plurality of the flow balancing grooves all pass through the center of the flow balancing plate and are distributed in a circular array with the center of the flow balancing plate as the center, and the flow groove is connected to the connecting points of the plurality of the flow balancing grooves.

[0009] The technical solution of the utility model is further configured as follows: the depth of the flow equalizing groove is less than the thickness of the flow equalizing plate, the circulation groove is connected with a plurality of the flow equalizing grooves through a connecting groove, the connecting groove is opened on the side of the flow equalizing plate facing the circulation groove, and the depth of the connecting groove is less than the thickness of the flow equalizing plate.

[0010] The technical solution of the utility model is further configured as follows: the cross-section of the flow balancing groove is arc-shaped.

[0011] The technical solution of the utility model is further configured as follows: a recess is provided on a surface of the valve body facing the connecting seat, a liquid inlet and a liquid outlet are provided on the inner bottom wall of the recess, a convex ring 1 for tightening the diaphragm is fixedly connected to the valve body, and the recess is located inside the convex ring 1.

[0012] The technical solution of the utility model is further configured as follows: a convex portion is fixedly connected to the inner bottom wall of the concave portion, the convex portion is aligned with the center of the diaphragm, and the liquid outlet and the liquid inlet are respectively located above and below the convex portion.

[0013] The technical solution of the utility model is further configured as follows: a plurality of coaxially arranged convex rings 2 are fixedly connected to the inner bottom wall of the recess, the convex portion is located at the axis center of the plurality of convex rings 2, and a plurality of the liquid inlets and the liquid outlets are provided and are located between the convex portion and the convex ring 2, between adjacent convex rings 2, and between the convex ring 2 and the inner wall of the recess.

[0014] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0015] By setting up a plurality of equalizing flow grooves, the metering pump can apply pressure to the diaphragm by means of hydraulic pressure when working, and prevent the pressure applied to the diaphragm from being concentrated in the center as much as possible, but disperse it to various parts of the diaphragm through the connecting grooves and the equalizing flow grooves, thereby preventing the diaphragm from excessive deformation and avoiding its damage. Because the center of the diaphragm is the area most susceptible to deformation and damage, the convex portion arranged on the valve body can play a certain role in preventing its excessive deformation, and the plurality of convex rings on the valve body can have the same effect on other areas of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0017] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0018] Figure 3 The structure of the connecting seat in the utility model is shown in FIG. Figure 1 ;

[0019] Figure 4 The structure of the connecting seat in the utility model is shown in FIG. Figure 2 ;

[0020] Figure 5It is a structural schematic diagram of the valve body in the utility model.

[0021] In the figure: 1. valve body; 2. pump body; 3. connecting seat; 4. flow groove; 5. flow equalizing plate; 6. flow equalizing groove; 7. connecting groove; 8. recess; 9. liquid inlet; 10. liquid outlet; 11. convex ring 1; 12. convex part; 13. convex ring 2. DETAILED DESCRIPTION

[0022] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model. Example

[0023] refer to Figures 1 to 5 As shown, the utility model provides an electromagnetically driven diaphragm plunger metering pump, comprising a valve body 1 and a pump body 2, the valve body 1 is connected to the pump body 2 via a connecting seat 3, a diaphragm is arranged between the valve body 1 and the connecting seat 3, a flow groove 4 is opened at one end of the connecting seat 3 facing the pump body 2, a flow equalizing plate 5 is fixedly connected to the end of the connecting seat 3 facing the valve body 1, the diaphragm covers the flow equalizing plate 5, and a plurality of flow equalizing grooves 6 distributed in an array are opened on a surface of the flow equalizing plate 5 away from the flow groove 4, and the flow groove 4 is connected to the plurality of flow equalizing grooves 6 at the same time.

[0024] refer to Figures 1 to 5 As shown, several flow balancing grooves 6 pass through the center of the flow balancing plate 5 and are distributed in a circular array with the center of the flow balancing plate 5 as the center. The depth of the flow balancing groove 6 is less than the thickness of the flow balancing plate 5. The cross-sectional shape of the flow balancing groove 6 is arc-shaped. The flow groove 4 is connected to the connecting points of several flow balancing grooves 6 through the connecting groove 7. The connecting groove 7 is opened on the side of the flow balancing plate 5 facing the flow groove 4, and the depth of the connecting groove 7 is less than the thickness of the flow balancing plate 5.

[0025] Through the arrangement of the above-mentioned structure, when the metering pump is working, the electromagnetic connecting rod inside the pump body 2 provides power, so that the hydraulic oil in the pump body 2 enters the connecting groove 7 and the flow equalizing groove 6 from the circulation groove 4, and is dispersed to various parts of the diaphragm through the flow equalizing groove 6. In this process, since the cross-sectional shape of the flow equalizing groove 6 is arc-shaped, the hydraulic oil can flow along the inner wall of the flow equalizing groove 6 to ensure the diffusion effect of the hydraulic oil. Moreover, since the connecting groove 7 does not penetrate the flow equalizing plate 5, the hydraulic oil will not directly flow out in large quantities from the center of the flow equalizing plate 5, thereby reducing the pressure applied to the center of the diaphragm and preventing it from excessive deformation.

[0026] refer to Figures 1 to 5As shown, a recess 8 is provided on one surface of the valve body 1 facing the connecting seat 3, a liquid inlet 9 and a liquid outlet 10 are provided on the inner bottom wall of the recess 8, a convex ring 11 for pressing against the diaphragm is fixedly connected to the valve body 1, the recess 8 is located in the convex ring 11, a convex portion 12 is fixedly connected to the inner bottom wall of the recess 8, the convex portion 12 is aligned with the center of the diaphragm, a plurality of coaxially arranged convex rings 13 are fixedly connected to the inner bottom wall of the recess 8, the convex portion 12 is located at the axis center of the plurality of convex rings 13, a plurality of liquid inlets 9 and liquid outlets 10 are provided and are located between the convex portion 12 and the convex rings 13, between adjacent convex rings 13, and between the convex rings 13 and the inner wall of the recess 8.

[0027] Through the arrangement of the above-mentioned structure, when the diaphragm is subjected to the pressure from the hydraulic oil, the diaphragm is deformed toward the valve body 1, and the convex portion 12 and the convex ring 13 prevent the various regions of the diaphragm from being excessively deformed. When the metering pump inhales fluid to work, the multiple liquid inlets 9 are designed separately, so that the pressure on the diaphragm during the inlet of liquid will not be concentrated in the center of the diaphragm, but will be distributed as much as possible, so that the diaphragm is subjected to force as evenly as possible during operation, preventing it from being excessively deformed, thereby extending its service life.

[0028] refer to Figures 1 to 5 As shown, by providing a plurality of equalizing grooves 6, the metering pump can apply pressure to the diaphragm by hydraulic means when working, and prevent the pressure applied to the diaphragm from being concentrated in the center thereof as much as possible, but disperse the pressure to various parts of the diaphragm through the connecting grooves 7 and the equalizing grooves 6, so as to prevent the diaphragm from excessive deformation and avoid its damage. Because the center of the diaphragm is the area most susceptible to deformation and damage, the convex portion 12 provided on the valve body 1 can play a certain role in preventing its excessive deformation, and the plurality of convex rings 13 on the valve body 1 can have the same effect on other areas of the diaphragm.

[0029] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An electromagnetically driven diaphragm plunger metering pump, comprising a valve body (1) and a pump body (2), wherein the valve body (1) is connected to the pump body (2) via a connecting seat (3), and a diaphragm is provided between the valve body (1) and the connecting seat (3), characterized in that: The connecting seat (3) is provided with a flow groove (4) at one end facing the pump body (2), and a flow equalizing plate (5) is fixedly connected to the connecting seat (3) at one end facing the valve body (1), and the diaphragm covers the flow equalizing plate (5). The flow equalizing plate (5) is provided with a plurality of flow equalizing grooves (6) distributed in an array on a side away from the flow groove (4), and the flow groove (4) is simultaneously connected to the plurality of flow equalizing grooves (6).

2. The electromagnetically driven diaphragm plunger metering pump according to claim 1, characterized in that: The plurality of flow balancing grooves (6) all pass through the center of the flow balancing plate (5) and are distributed in a circular array with the center of the flow balancing plate (5) as the center of the circle, and the flow groove (4) is connected to the connection points of the plurality of flow balancing grooves (6).

3. The electromagnetically driven diaphragm plunger metering pump according to claim 2, characterized in that: The depth of the flow balancing groove (6) is less than the thickness of the flow balancing plate (5); the circulation groove (4) is connected to a plurality of the flow balancing grooves (6) via a connecting groove (7); the connecting groove (7) is provided on a side of the flow balancing plate (5) facing the circulation groove (4); the depth of the connecting groove (7) is less than the thickness of the flow balancing plate (5).

4. The electromagnetically driven diaphragm plunger metering pump according to claim 3, characterized in that: The cross-section of the flow balancing groove (6) is arc-shaped.

5. The electromagnetically driven diaphragm plunger metering pump according to claim 1, characterized in that: The valve body (1) is provided with a recess (8) on one side facing the connecting seat (3), and a liquid inlet (9) and a liquid outlet (10) are provided on the inner bottom wall of the recess (8). A convex ring (11) for pressing against the diaphragm is fixedly connected to the valve body (1), and the recess (8) is located inside the convex ring (11).

6. The electromagnetically driven diaphragm plunger metering pump according to claim 5, characterized in that: A convex portion (12) is fixedly connected to the inner bottom wall of the concave portion (8), the convex portion (12) is aligned with the center of the diaphragm, and the liquid outlet (10) and the liquid inlet (9) are respectively located above and below the convex portion (12).

7. The electromagnetically driven diaphragm plunger metering pump according to claim 6, characterized in that: A plurality of coaxially arranged convex rings (13) are fixedly connected to the inner bottom wall of the recess (8); the convex portion (12) is located at the axis center of the plurality of convex rings (13); and a plurality of liquid inlets (9) and liquid outlets (10) are provided and are located between the convex portion (12) and the convex rings (13), between adjacent convex rings (13), and between the convex rings (13) and the inner wall of the recess (8).

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