Constant flow pump

Abstract

The utility model provides a constant flow pump which comprises a pump body, a pump head, a cavity sleeve, a telescopic air bag pipe, a driving mechanism, a cam mechanism, a linear roller mechanism, a connecting rod and an air bag pipe end, the pump head is connected with the pump body, a containing cavity is formed in the pump body, the cavity sleeve is arranged in the containing cavity and divides the containing cavity into a liquid injection cavity and a movable cavity, and a liquid injection channel is formed in the pump head. The cam mechanism is arranged in the movable cavity, the driving mechanism is connected with the cam mechanism, the cam mechanism is connected with the linear roller mechanism, the linear roller mechanism is connected with the connecting rod, the connecting rod is connected with the end of the air bag pipe, the telescopic air bag pipe and the end of the air bag pipe are both located in the liquid injection cavity, and the end of the air bag pipe is arranged on the connecting rod. The constant flow pump is better in sealing effect, better in corrosion resistance and more stable in liquid output flow.

Description

Technical Field

[0001] This utility model relates to the field of constant flow pump technology, specifically to a constant flow pump. Background Technology

[0002] Currently, in the production processes of products such as batteries, cosmetics, food, electronic products, and biological reagents, the dispensing and filling of fluids require the use of precision metering pumps to measure the fluids. However, the use of existing metering pumps can cause pulsation during filling. To solve this problem, constant flow pumps have emerged.

[0003] As an emerging type of equipment in the field of fluid transportation, constant flow pumps are widely used due to their ability to provide stable and adjustable flow rates. However, existing constant flow pumps still have room for improvement in some aspects. For example, some components in constant flow pumps need to reciprocate continuously. After long-term operation, the seals associated with this reciprocating motion are prone to wear, resulting in a short service life and leakage problems. This leads to a decrease in flow accuracy and an unstable liquid output flow rate. Utility Model Content

[0004] The purpose of this invention is to provide a constant flow pump that solves the problems of easy wear of the seals and unstable output flow in existing constant flow pumps.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A constant flow pump is provided, comprising a pump body, a pump head, a cavity sleeve, a telescopic airbag tube, a drive mechanism, a cam mechanism, a linear roller mechanism, a connecting rod, and an end of the airbag tube. The pump head is connected to the pump body. The pump body has an internal receiving cavity. The cavity sleeve is disposed in the receiving cavity and divides the receiving cavity into an injection cavity and a movable cavity. The pump head has an internal injection channel that communicates with the injection cavity. The cam mechanism is disposed in the movable cavity. The drive mechanism is connected to the cam mechanism. The cam mechanism is connected to the linear roller mechanism. The linear roller mechanism is connected to the connecting rod. The connecting rod is connected to the end of the airbag tube. The telescopic airbag tube and the end of the airbag tube are both located in the injection cavity. The end of the airbag tube is disposed on the connecting rod.

[0007] Optionally, the number of pump heads is multiple.

[0008] Optionally, the pump head is provided with an inlet valve and an outlet valve, both of which are connected to the injection channel.

[0009] Optionally, a sealing ring is provided between the cavity sleeve and the body.

[0010] Optionally, the telescopic airbag tube is made of plastic.

[0011] Optionally, the telescopic airbag tube is made of metal.

[0012] Optionally, the driving mechanism is a motor.

[0013] Optionally, the cam mechanism includes a camshaft and a cam body, the cam body being disposed on the camshaft, and the camshaft being connected to the drive mechanism.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In the constant flow pump provided by this utility model, the drive mechanism drives the cam mechanism to rotate. Each cam body drives a corresponding linear roller mechanism, which is connected to a connecting rod at the end of the airbag tube. The connecting rod drives the end of the airbag tube, and through the expansion and contraction deformation of the telescopic airbag tube, the end of the airbag tube moves back and forth, generating a change in the internal volume of the injection chamber. The constant flow pump draws and injects liquid through the inlet valve and outlet valve. The inlets of multiple pump heads are connected together, and the cam movement drives the corresponding airbag tube ends to move, making the liquid output flow rate more stable. In addition, the telescopic airbag tube is used instead of the sealing ring to isolate the injection chamber and the moving chamber, resulting in a better sealing effect and eliminating friction and shearing effects on the liquid. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the constant flow pump of this utility model;

[0018] Figure 2 This is a left view of the constant flow pump of this utility model;

[0019] Figure 3 for Figure 2 A cross-sectional view along the CC direction;

[0020] Figure 4 for Figure 2 Sectional view along the DD direction;

[0021] Figure 5 for Figure 2 A sectional view along the EE direction;

[0022] Figure 6 for Figure 2 Sectional view along the FF direction.

[0023] In the diagram: 1. Pump body; 2. Pump head; 21. Inlet valve; 22. Outlet valve; 23. Inlet; 24. Outlet; 3. Cavity sleeve; 4. Drive mechanism; 5. Cam mechanism; 51. Camshaft; 52. Cam body; 6. Linear roller mechanism; 7. Connecting rod; 8. End of airbag tube; 9. Telescopic airbag tube. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0027] The following is combined with Figures 1 to 6 This invention describes a constant flow pump.

[0028] like Figures 1 to 6As shown, this utility model provides a constant flow pump, including a pump body 1, a pump head 2, a cavity sleeve 3, a telescopic airbag tube 9, a drive mechanism 4, a cam mechanism 5, a linear roller mechanism 6, a connecting rod 7, and an airbag tube end 8. The pump head 2 is connected to the pump body 1. The pump body 1 has an internal receiving cavity. The cavity sleeve 3 is located in the receiving cavity and divides the receiving cavity into an injection cavity and a movable cavity. The pump head 2 has an internal injection channel that communicates with the injection cavity. The cam mechanism 5 is located in the movable cavity. The drive mechanism 4 is connected to the cam mechanism 5. The cam mechanism 5 is connected to the linear roller mechanism 6. The linear roller mechanism 6 is connected to the connecting rod 7. The connecting rod 7 is connected to the airbag tube end 8. The telescopic airbag tube 9 and the airbag tube end 8 are both located in the injection cavity. The telescopic airbag tube 9 is sleeved on the connecting rod 7. Specifically, the telescopic airbag tube 9 and the airbag tube end 8 are integral parts. The other end of the telescopic airbag tube 9 is connected to the cavity sleeve 3.

[0029] In the constant flow pump provided in this embodiment, the drive mechanism 4 drives the cam mechanism 5 to rotate. Each cam body 52 drives the corresponding linear roller mechanism 6. The linear roller mechanism 6 is connected to the connecting rod 7 with the telescopic airbag tube 9. The connecting rod 7 drives the end 8 of the airbag tube to move back and forth. The constant flow pump realizes liquid suction and injection through the inlet valve 21 and the outlet valve 22. The inlets 23 of multiple pump heads 2 are connected together. The cam movement drives the corresponding end 8 of the airbag tube to move, making the liquid output flow rate more stable. In addition, the telescopic airbag tube 9 is used instead of the sealing ring to isolate the injection chamber and the moving chamber, resulting in a better sealing effect.

[0030] In some embodiments, there are multiple pump heads 2. Specifically, there can be three pump heads 2. The inlet ports 23 of the three pump heads 2 are connected together, and the outlet ports 24 of the three pump heads 2 are also connected together. There are three cam bodies 52 on the camshaft 51, which can drive the three connecting rods 7 to reciprocate, thereby making the output flow of the liquid more stable.

[0031] In some other embodiments, the number of pump heads 2 can be changed according to the actual situation.

[0032] In some embodiments, the pump head 2 is provided with an inlet valve 21 and an outlet valve 22, both of which are connected to the injection channel, enabling better control of the inlet and outlet. Only one embodiment is shown in the figure. The functions of the inlet valve 21 and the outlet valve 22 can be interchanged. The pump head 2 is provided with an inlet port 23 and an outlet port 24, and the functions of the inlet port 23 and the outlet port 24 can also be interchanged.

[0033] In some embodiments, a sealing ring is provided between the sleeve 3 and the body, which can improve the sealing effect of the sleeve 3 and prevent liquid from flowing into the active cavity.

[0034] In some embodiments, the telescopic airbag tube 9 is made of plastic and has a certain degree of elasticity. It can be compressed or extended with the reciprocating motion of the plug rod 7 and the end of the airbag tube 8. While not hindering the reciprocating motion of the connecting rod 7, it can play a good role in isolation and sealing.

[0035] In some embodiments, the telescopic airbag tube 9 is a metal component, and the outer wall of the telescopic airbag tube 9 has a corrugated folded structure. The local small deformations at each position of the corrugation can be superimposed to form a large longitudinal movement stroke, which can achieve a good isolation and sealing effect without hindering the reciprocating movement of the connection 7.

[0036] In some embodiments, the drive mechanism 4 is a motor, which can better drive the cam mechanism 5 to rotate.

[0037] In some embodiments, the cam mechanism 5 includes a cam shaft 51 and a cam body 52. ​​The cam body 52 is disposed on the cam shaft 51, and the cam shaft 51 is connected to the drive mechanism 4. Specifically, the number of cam bodies 52 and pump heads 2 is the same, and the cam body 52 can drive the corresponding wind bag tube end 8 to move through the cam action, so that the output flow of liquid is more stable.

[0038] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A constant flow pump, characterized in that, The pump includes a pump body (1), a pump head (2), a cavity sleeve (3), a telescopic air bag tube (9), a drive mechanism (4), a cam mechanism (5), a linear roller mechanism (6), a connecting rod (7), and an air bag tube end (8). The pump head (2) is connected to the pump body (1). The pump body (1) has an internal cavity. The cavity sleeve (3) is located in the cavity and divides the cavity into an injection cavity and a movable cavity. The pump head (2) has an internal injection channel. The injection channel is connected to the injection... The liquid chamber is connected, the cam mechanism (5) is located in the movable chamber, the drive mechanism (4) is connected to the cam mechanism (5), the cam mechanism (5) is connected to the linear roller mechanism (6), the linear roller mechanism (6) is connected to the connecting rod (7), the connecting rod (7) is connected to the end of the airbag tube (8), the telescopic airbag tube (9) and the end of the airbag tube (8) are both located in the injection chamber, and the end of the airbag tube (9) is sleeved on the connecting rod (7).

2. The constant flow pump according to claim 1, characterized in that, The number of pump heads (2) is multiple.

3. The constant flow pump according to claim 1, characterized in that, The pump head (2) is equipped with an inlet valve (21) and an outlet valve (22), both of which are connected to the injection channel.

4. The constant flow pump according to claim 1, characterized in that, A sealing ring is provided between the cavity sleeve (3) and the body.

5. The constant flow pump according to claim 1, characterized in that, The telescopic airbag tube (9) is made of plastic.

6. The constant flow pump according to claim 1, characterized in that, The telescopic airbag tube (9) is made of metal.

7. The constant flow pump according to claim 1, characterized in that, The drive mechanism (4) is a motor.

8. The constant flow pump according to claim 1, characterized in that, The cam mechanism (5) includes a camshaft (51) and a cam body (52), the cam body (52) is disposed on the camshaft (51), and the camshaft (51) is connected to the drive mechanism (4).

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