Diaphragm pump

Abstract

The utility model relates to the technical field of pumps, and discloses a diaphragm pump which comprises a diaphragm pump body, a diaphragm pump cavity is formed in the diaphragm pump body, liquid passing pipes communicating with the diaphragm pump cavity are arranged at the two ends of the diaphragm pump body correspondingly, the upper ends of the two liquid passing pipes communicate with a discharging pipe, and the lower ends of the two liquid passing pipes communicate with a feeding pipe. An upper sealing ball and a lower sealing ball which are movable are arranged at the two ends of the interior of each liquid passing pipe respectively, an air inlet and a discharging opening are formed in the positions, between the upper sealing ball and the lower sealing ball, of the liquid passing pipes, the air inlets are located above the discharging opening, the air inlets of the two liquid passing pipes are connected through an air inlet pipe, and the middle of the air inlet pipe is used for being connected with compressed air; and a discharge valve is arranged on the discharge port. According to the diaphragm pump, residual slurry in the cavity of the diaphragm pump can be recycled, so that the slurry utilization rate is increased. And meanwhile, after the residual slurry in the cavity of the diaphragm pump is recycled, the diaphragm pump can be conveniently cleaned, so that the cleaning efficiency is improved, and the cleaning cost is reduced.

Description

Technical Field

[0001] This application relates to the field of pump technology, and in particular to a diaphragm pump. Background Technology

[0002] In the lithium battery manufacturing industry, pneumatic diaphragm pumps are widely used as the power source for slurry transportation. However, during use, due to the physical structure of the pump, a large amount of slurry cannot be effectively discharged from the pump chamber. This results in a large amount of slurry waste when changing the formula or periodically cleaning the transportation system with solvents. At the same time, excessive slurry residue also increases the cleaning cost and difficulty.

[0003] Currently, there is a lack of effective methods in the industry to recover slurry from the diaphragm pump chamber. Recovery can only be carried out by disassembling the pump body or inverting the pump body, which is time-consuming and labor-intensive. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a diaphragm pump that facilitates the recovery of residual slurry inside the diaphragm pump cavity, thereby improving slurry utilization, increasing cleaning efficiency, and reducing cleaning costs.

[0005] The technical solution adopted by this application to solve its technical problem is:

[0006] A diaphragm pump includes a diaphragm pump body, an internal diaphragm pump cavity, and two liquid-passing pipes communicating with the diaphragm pump cavity at both ends of the diaphragm pump body. A discharge pipe is connected to the upper ends of the two liquid-passing pipes, and a feed pipe is connected to the lower ends of the two liquid-passing pipes. Movable upper and lower sealing balls are respectively provided at both ends of the internal liquid-passing pipes. An air inlet and a discharge outlet are provided on the liquid-passing pipes between the upper and lower sealing balls, with the air inlet located above the discharge outlet. The air inlets of the two liquid-passing pipes are connected by an air inlet pipe, the middle of which is used to connect compressed gas. A discharge valve is provided on the discharge outlet.

[0007] When the diaphragm pump is in a stopped state, the upper sealing ball blocks the liquid passage pipe and the discharge pipe to prevent the liquid passage pipe and the discharge pipe from communicating; the lower sealing ball blocks the liquid passage pipe and the feed pipe to prevent the liquid passage pipe and the feed pipe from communicating.

[0008] When the diaphragm pump is in operation, the liquid passage pipe is connected to the discharge pipe, and the liquid passage pipe is connected to the feed pipe.

[0009] Preferably, the intake pipe is provided with a T-connector, and two of the ports of the T-connector are connected to the intake pipe, while the other port is used to connect to compressed gas.

[0010] Preferably, the air inlet is provided with a one-way valve, and the air inlet pipe is connected to the one-way valve.

[0011] Preferably, the liquid-passing pipe is provided with an upper ball seat and a lower ball seat, the upper sealing ball is disposed in the upper ball seat, and the lower sealing ball is disposed in the lower ball seat;

[0012] The upper ball seat has an upper mounting cavity for placing the upper sealing ball inside. The upper end of the upper ball seat has an upper limit hole that communicates with the upper mounting cavity, and the lower end of the upper ball seat has an upper sealing hole that communicates with the upper mounting cavity.

[0013] The lower ball seat has a lower mounting cavity for placing the lower sealing ball inside. The upper end of the lower ball seat has a lower limiting hole that communicates with the lower mounting cavity, and the lower end of the lower ball seat has a lower sealing hole that communicates with the lower mounting cavity.

[0014] Preferably, the distance between the lowest point of the upper ball seat and the center of the air inlet in the height direction is H1, where H1 = R1 + (1~10) mm;

[0015] Wherein, R1 is the radius of the air inlet, and its value ranges from 4 to 6 mm.

[0016] Preferably, when the diaphragm pump is in a stopped state, the distance between the center of the lower sealing ball and the center of the discharge port in the height direction is H2, where H2 = R2 + (2~10) mm;

[0017] Wherein, R2 is the radius of the discharge port, and its value ranges from 4 to 6 mm.

[0018] Preferably, the diameter of the air intake pipe is 8 to 15 mm.

[0019] Preferably, the discharge port is provided with a discharge pipe, and the discharge valve is provided on the discharge pipe.

[0020] Preferably, the diaphragm pump body includes two pump bodies arranged opposite to each other. The pump body is provided with a diaphragm, which divides the pump body into an air chamber and a pump chamber. The pump chamber is connected to the liquid passage pipe. The two diaphragms are connected by a connecting rod assembly, which can move laterally to change the volume of the air chamber and the pump chamber in the pump body. The air chamber and the pump chamber of the two pump bodies together constitute the diaphragm pump cavity.

[0021] Preferably, the system includes a base on which the feed tube is supported.

[0022] The diaphragm pump of this application embodiment has the following advantages compared with the prior art: by setting an air inlet and a discharge outlet on the liquid-passing pipe between the upper and lower sealing balls, and connecting the air inlets of the two liquid-passing pipes with an air inlet pipe, the middle of the air inlet pipe is used to connect compressed gas, and a discharge valve is set on the discharge outlet of the liquid-passing pipe, when it is necessary to recover the residual slurry in the diaphragm pump cavity, the diaphragm pump is in a stopped state, the upper sealing ball is blocked between the liquid-passing pipe and the discharge pipe to prevent communication between the liquid-passing pipe and the discharge pipe, and the lower sealing ball is blocked between the liquid-passing pipe and the feed pipe to prevent communication between the liquid-passing pipe and the feed pipe. At this time, compressed gas is introduced into the air inlet pipe. Under the action of the compressed gas, the pressure in the diaphragm pump cavity increases, causing the residual slurry to be discharged through the discharge valve, thereby recovering the residual slurry in the diaphragm pump cavity and improving the slurry utilization rate. Meanwhile, the residual slurry in the diaphragm pump chamber is recovered, which also facilitates cleaning, thereby improving cleaning efficiency and reducing cleaning costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the diaphragm pump of this application.

[0024] Figure 2 This is a partial cross-sectional view of the diaphragm pump of this application.

[0025] The components are: 1-Diaphragm pump body, 11-Pump body, 12-Diaphragm, 13-Air chamber, 14-Pump chamber, 15-Connecting rod assembly, 16-Intermediate body, 17-Diaphragm pump cavity, 2-Liquid pipe, 21-Air inlet, 22-Discharge port, 3-Discharge pipe, 4-Inlet pipe, 5-Upper sealing ball, 6-Air inlet pipe, 7-Discharge valve, 8-T-connector, 9-Upper ball seat, 91-Upper mounting cavity, 92-Upper limit hole, 93-Upper sealing hole, 10-Check valve, 20-Base, 30-Lower sealing ball, 40-Lower ball seat, 401-Lower mounting cavity, 402-Lower limit hole, 403-Lower sealing hole. Detailed Implementation

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] like Figure 1-2As shown, a preferred embodiment of the diaphragm pump of this application includes a diaphragm pump body 1. The diaphragm pump body 1 has a diaphragm pump cavity 17 inside. The two ends of the diaphragm pump body 1 are respectively provided with liquid passage pipes 2 connected to the diaphragm pump cavity 17. The upper ends of the two liquid passage pipes 2 are connected to a discharge pipe 3, and the lower ends of the two liquid passage pipes 2 are connected to a feed pipe 4. The two ends of the liquid passage pipe 2 are respectively provided with a movable upper sealing ball 5 and a lower sealing ball 30. An air inlet 21 and a discharge port 22 are provided on the liquid passage pipe 2 between the upper sealing ball 5 and the lower sealing ball 30, and the air inlet 21 is located above the discharge port 22. The air inlets 21 of the two liquid passage pipes 2 are connected by an air inlet pipe 6. The middle part of the air inlet pipe 6 is used to connect compressed gas. Preferably, the intake pipe 6 is provided with a three-way connector 8, with two of the ports of the three-way connector 8 connected to the intake pipe 6 and the other port used to connect compressed gas. This connection via the three-way connector 8 facilitates the connection of compressed gas to the intake pipe 6. The diameter of the intake pipe 6 is 8–15 mm, which can be the outer diameter, inner diameter, or nominal diameter, such as 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, etc., preferably DN10.

[0028] The discharge port 22 is equipped with a discharge valve 7, through which the slurry remaining in the diaphragm pump chamber 17 is discharged. Furthermore, the discharge valve 7, the three-way connector 8, and the air inlet pipe 6 are all made of stainless steel.

[0029] The diaphragm pump based on the above technical features has an air inlet 21 and a discharge port 22 located between the upper sealing ball 5 and the lower sealing ball 30 on the liquid passage pipe 2. An air inlet pipe 6 is connected between the air inlets 21 of the two liquid passage pipes 2, with compressed gas connected to the middle section of the air inlet pipe 6. A discharge valve 7 is installed on the discharge port 22 of the liquid passage pipe 2. When it is necessary to recover residual slurry in the diaphragm pump cavity 17, the diaphragm pump is in a stopped state, and the upper sealing ball 5 seals the liquid passage pipe. The liquid passage pipe 2 is positioned between the liquid passage pipe 2 and the discharge pipe 3 to prevent them from communicating. A lower sealing ball seal 30 is placed between the liquid passage pipe 2 and the feed pipe 4 to further prevent them from communicating. Compressed gas is then introduced into the air inlet pipe 6. Under the action of the compressed gas, the pressure inside the diaphragm pump chamber 17 increases, causing the residual slurry to be discharged through the discharge valve 7. This allows for the recovery of the residual slurry inside the diaphragm pump chamber 17, thereby improving slurry utilization. Simultaneously, the recovery of the residual slurry inside the diaphragm pump chamber 17 facilitates cleaning, thus improving cleaning efficiency and reducing cleaning costs.

[0030] When recovering slurry, the discharge valve 7 is first opened. At this time, the diaphragm pump chamber 17 is under negative pressure. Introducing compressed gas changes the pressure within the diaphragm pump chamber 17, thus achieving discharge. Since the slurry has gravity, introducing compressed gas only requires balancing the pressure inside the diaphragm pump chamber 17 to achieve discharge through the discharge valve 7. Increasing the compressed gas pressure further, especially with a slight positive pressure, can accelerate discharge. However, when the pressure exceeds the discharge rate of the discharge valve 7, the pressure inside the diaphragm pump chamber 17 will blow up the upper sealing ball 5, thus opening the passage to the discharge pipe 3. Some gas will be discharged into the diaphragm pump's discharge pipe 3, potentially carrying away some residual slurry. This could also be used for slurry recovery, although this is generally not used. Therefore, preferably, the input compressed gas should only ensure pressure balance or a slight positive pressure within the diaphragm pump chamber 17.

[0031] In this embodiment, to prevent slurry from flowing into the air inlet pipe 6 during residual slurry recovery, a one-way valve 10 is provided on the air inlet 21. The air inlet pipe 6 is connected to the one-way valve 10, meaning that under the action of the one-way valve 10, only gas is allowed to enter the diaphragm pump chamber 17, while the slurry in the diaphragm pump chamber 17 cannot flow into the air inlet pipe 6. Simultaneously, to facilitate the recovery of slurry discharged from the discharge valve 7, a discharge pipe can be provided at the discharge port 22, with the discharge valve 7 mounted on the discharge pipe. This allows the discharge port 22 to extend outward, facilitating connection to a container holding the slurry.

[0032] When the diaphragm pump is in operation, the one-way valve 10 and the discharge valve 7 are both closed, the liquid passage pipe 2 is connected to the discharge pipe 3, and the liquid passage pipe 2 is connected to the feed pipe 4, thereby realizing the conveying of materials.

[0033] In this embodiment, the upper end of the liquid-passing pipe 2 is provided with an upper ball seat 9, the lower end of the liquid-passing pipe 2 is provided with a lower ball seat 40, the upper sealing ball 5 is disposed in the upper ball seat 9, and the lower sealing ball 30 is disposed in the lower ball seat 40.

[0034] Specifically, the upper ball seat 9 has an upper mounting cavity 91 for placing the upper sealing ball 5. The upper end of the upper ball seat 9 has an upper limit hole 92 communicating with the upper mounting cavity 91. When the upper sealing ball 5 abuts against the upper limit hole 92, it does not seal the upper limit hole 92, thus allowing the slurry to pass through normally. The lower end of the upper ball seat 9 has an upper sealing hole 93 communicating with the upper mounting cavity 91. When the upper sealing ball 5 abuts against the upper sealing hole 93, a seal is achieved. The lower ball seat 40 has the same structure as the upper ball seat 9, including a lower mounting cavity 401. The upper and lower ends of the lower ball seat 40 are respectively provided with a lower limiting hole 402 and a lower sealing hole 403 communicating with the lower mounting cavity 401. When the lower sealing ball 30 abuts against the lower limiting hole 402, it does not seal the lower limiting hole 402, thus allowing slurry to pass normally through it. During normal operation, the diaphragm pump achieves material conveying by connecting or separating the upper sealing ball 5 and the lower sealing ball 30 with their corresponding limiting holes and sealing holes.

[0035] Since the upper sealing ball 5 naturally falls down and blocks the upper sealing hole 93 when the diaphragm pump is in a static state, the air inlet 21 needs to be located below the upper ball seat 9. At the same time, in order to recover as much slurry as possible in the diaphragm pump cavity 17, the discharge port 22 should be as close as possible to the lower sealing ball 30, and the air inlet 21 should be as close as possible to the upper ball seat 9.

[0036] Specifically, when the diaphragm pump is in a static state, the distance between the center of the lower sealing ball 30 and the center of the discharge port 22 in the height direction is H2, where H2 = R2 + (2~10) mm; and R2 is the radius of the discharge port 22, and its value ranges from 4 to 6 mm, such as 4.1 mm, 4.2 mm, 4.5 mm, 5 mm, 5.2 mm, 5.4 mm, 5.8 mm, etc.

[0037] Meanwhile, the distance between the lowest point of the upper ball seat 9 and the center of the air inlet 21 in the height direction is H1, where H1 = R1 + (1~10) mm; where R1 is the radius of the air inlet 21, and its value ranges from 4 to 6 mm, such as 4.1 mm, 4.2 mm, 4.5 mm, 5 mm, 5.2 mm, 5.4 mm, 5.8 mm, etc.

[0038] The upper ball seat 9 and the lower ball seat 40 may have the same or different shapes, but are preferably the same. The upper and lower ends of the upper ball seat 9 and the lower ball seat 40 may be flat or curved surfaces, preferably flat. In this case, the lowest point of the upper ball seat 9 is its lower plane.

[0039] In this embodiment, the diaphragm pump body 1 includes two pump bodies 11 arranged opposite each other. Each pump body 11 has a diaphragm 12 inside, which divides the pump body 11 into an air chamber 13 and a pump chamber 14. The pump chamber 14 is connected to the liquid pipe 2. The two diaphragms 12 are connected by a connecting rod assembly 15, which can move laterally to change the volume of the air chamber 13 and the pump chamber 14 within the pump body 11. Specifically, an intermediate body 16 connects the two pump bodies 11. The intermediate body 16 is used to connect a drive mechanism and can be pneumatically, electrically, or hydraulically driven. The connecting rod assembly 15 is inserted into the intermediate body 16 and connected to the drive mechanism. Under the action of the drive mechanism, the connecting rod assembly 15 moves laterally to change the volume of the air chamber 13 and the pump chamber 14 on the same side. When the diaphragm 12 moves to one side, the pump chamber 14 on one side is under negative pressure and draws in liquid, while the other side discharges liquid. This process repeats, enabling the diaphragm pump to transport materials. The air chambers 13 and pump chambers 14 of the two pump bodies 11 together constitute the diaphragm pump cavity 17.

[0040] In this embodiment, to ensure the working stability of the diaphragm pump, a base 20 can also be provided, and the feed pipe 4 is supported on the base 20, thereby ensuring the stability of the diaphragm pump.

[0041] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A diaphragm pump, characterized in that: The device includes a diaphragm pump body, which has a diaphragm pump cavity inside. Two liquid-passing pipes, each communicating with the diaphragm pump cavity, are located at opposite ends of the diaphragm pump body. A discharge pipe is connected to the upper end of each liquid-passing pipe, and a feed pipe is connected to the lower end of each liquid-passing pipe. A movable upper sealing ball and a lower sealing ball are located at opposite ends of each liquid-passing pipe. An air inlet and a discharge outlet are located between the upper and lower sealing balls on each liquid-passing pipe, with the air inlet located above the discharge outlet. The air inlets of the two liquid-passing pipes are connected via an air inlet pipe, the middle of which is used to connect compressed gas. A discharge valve is located on the discharge outlet. When the diaphragm pump is in a stopped state, the upper sealing ball blocks the liquid passage pipe and the discharge pipe to prevent the liquid passage pipe and the discharge pipe from communicating; the lower sealing ball blocks the liquid passage pipe and the feed pipe to prevent the liquid passage pipe and the feed pipe from communicating. When the diaphragm pump is in operation, the liquid passage pipe is connected to the discharge pipe, and the liquid passage pipe is connected to the feed pipe.

2. The diaphragm pump as described in claim 1, characterized in that: The intake pipe is equipped with a T-connector, and two of the T-connector's ports are connected to the intake pipe, while the other port is used to connect to compressed gas.

3. The diaphragm pump as described in claim 1, characterized in that: The air inlet is equipped with a one-way valve, and the air inlet pipe is connected to the one-way valve.

4. The diaphragm pump as described in claim 1, characterized in that: The liquid-passing pipe is provided with an upper ball seat and a lower ball seat, the upper sealing ball is disposed in the upper ball seat, and the lower sealing ball is disposed in the lower ball seat; The upper ball seat has an upper mounting cavity for placing the upper sealing ball inside. The upper end of the upper ball seat has an upper limit hole that communicates with the upper mounting cavity, and the lower end of the upper ball seat has an upper sealing hole that communicates with the upper mounting cavity. The lower ball seat has a lower mounting cavity for placing the lower sealing ball inside. The upper end of the lower ball seat has a lower limiting hole that communicates with the lower mounting cavity, and the lower end of the lower ball seat has a lower sealing hole that communicates with the lower mounting cavity.

5. The diaphragm pump as described in claim 4, characterized in that: The distance between the lowest point of the upper ball seat and the center of the air inlet in the height direction is H1, where H1 = R1 + (1~10) mm; Wherein, R1 is the radius of the air inlet, and its value ranges from 4 to 6 mm.

6. The diaphragm pump according to any one of claims 1-5, characterized in that: When the diaphragm pump is in a stopped state, the distance between the center of the lower sealing ball and the center of the discharge port in the height direction is H2, where H2 = R2 + (2 ~ 10) mm; Wherein, R2 is the radius of the discharge port, and its value ranges from 4 to 6 mm.

7. The diaphragm pump according to any one of claims 1-5, characterized in that: The diameter of the air intake pipe is 8-15 mm.

8. The diaphragm pump according to any one of claims 1-5, characterized in that: The discharge port is equipped with a discharge pipe, and the discharge valve is installed on the discharge pipe.

9. The diaphragm pump according to any one of claims 1-5, characterized in that: The diaphragm pump body includes two pump bodies arranged opposite each other. The pump body is provided with a diaphragm plate inside, and the diaphragm plate divides the pump body into an air chamber and a pump chamber. The pump chamber is connected to the liquid passage pipe. The two diaphragm plates are connected by a connecting rod assembly. The connecting rod assembly can move laterally to change the volume of the air chamber and the pump chamber in the pump body. The air chamber and the pump chamber of the two pump bodies together constitute the diaphragm pump cavity.

10. The diaphragm pump according to any one of claims 1-5, characterized in that: Includes a base, on which the feed tube is supported.

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