Diaphragm metering pump with cavitation eliminator

Abstract

The utility model relates to the technical field of metering pumps, in particular to a diaphragm metering pump with a cavitation eliminator, which comprises a support plate, a metering pump body, a pump head, a suction pipe and an alkali liquor delivery pipe, and the upper end of the support plate is fixedly connected with the metering pump body. By arranging an air eliminating pipe, an air extractor, an elastic telescopic hose, a second electric telescopic rod and a sealing cover, when air bubbles are accumulated in a pump head and air holes appear, a worker takes down the sealing cover with hands, then the second electric telescopic rod is started, the second electric telescopic rod drives the sealing cover to move rightwards, and the sealing cover is aligned with an opening in the left end of the air eliminating pipe; the pump head is sealed, then the air exhauster is started through the controller, the air exhauster exhausts air bubbles in the pump head through the elastic telescopic hose, the sealing cover, the air eliminating pipe and the suction pipe, the air bubbles in the pump head can be eliminated without disassembling the pump head in the operation process, and therefore the disassembling frequency of the pump head is reduced, the loss of the pump head is reduced, and the service life of the pump head is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, in particular to a diaphragm metering pump with a cavitation eliminator. Background Art

[0002] The diaphragm metering pump is a common fluid control equipment. It is widely used in chemical, petrochemical, environmental protection, water treatment and food processing fields. The diaphragm metering pump is a pump that realizes liquid transportation through a diaphragm. It is mainly composed of a drive device, a diaphragm, a suction valve, a pressure valve, a pump head and a motor. Its basic working principle is that a diaphragm is provided in the pump head, and the upper and lower parts of the diaphragm are respectively connected to the suction valve and the discharge port. When the motor of the pump is started, the drive device moves the diaphragm backward, and the volume in the pump head increases. At this time, the suction valve opens and the liquid is sucked into the pump head. The drive device moves the diaphragm forward, and the volume in the pump head decreases. At this time, the discharge valve opens and the liquid is discharged from the pump head by pressure.

[0003] During the use of the liquid alkali metering pump, since the liquid alkali solution contains some bubbles, the bubbles enter the metering pump with the liquid alkali, and then the liquid alkali flows out, while the bubbles remain in the pump head, causing cavitation in the pump head frequently, resulting in the pump being empty and unable to pump out the liquid alkali, affecting the normal operation of the metering pump. At this time, the pump head needs to be disassembled and the internal bubbles removed before it can continue to be used. However, the disassembly and installation process is rather cumbersome, and frequent disassembly and installation can easily damage the metering pump and reduce its service life. Therefore, in response to the above problems, we propose a diaphragm metering pump with a cavitation eliminator. Utility Model Content

[0004] The utility model aims to provide a diaphragm metering pump with a cavitation eliminator to solve the problem that bubbles are retained in the pump head, resulting in frequent cavitation in the pump head, causing the pump to be empty and unable to pump out liquid alkali, affecting the normal operation of the metering pump. In this case, the pump head needs to be disassembled to remove the internal bubbles before it can continue to be used. However, the disassembly and installation process is relatively cumbersome, and frequent disassembly and installation can easily cause damage to the metering pump and reduce the service life.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A diaphragm metering pump with a cavitation eliminator comprises a support plate, a metering pump body, a pump head, a suction pipe and an alkali solution delivery pipe, wherein the upper end of the support plate is fixedly connected to the metering pump body, the left end of the metering pump body is fixedly connected to the pump head, the upper end of the pump head is fixedly connected to the suction pipe, the outer side of the suction pipe is fixedly connected to a connecting flange, the inner side of the connecting flange is fixedly connected to the alkali solution delivery pipe, the left end of the suction pipe is fixedly connected to the cavitation eliminator, the upper end of the support plate is fixedly connected to a connecting plate, the right end of the connecting plate is fixedly connected to an exhaust fan, and the inner wall of the suction pipe is fixedly connected to a first Filter plate, the upper end of the first filter plate is fixedly connected with a spike, the inner wall of the suction pipe is fixedly connected with a second filter plate, the upper end of the second filter plate is fixedly connected with a first electric telescopic rod, the upper end of the first electric telescopic rod is fixedly connected with a third filter plate, the right end of the vacuum pump is fixedly connected with an elastic telescopic hose, the right end of the vacuum pump is fixedly connected with a second electric telescopic rod, the right end of the second electric telescopic rod is fixedly connected with a sealing cover, the lower end of the air remover is fixedly connected with a connecting block, the left end of the connecting block is fixedly connected with a rubber rope, and the other end of the rubber rope is fixedly connected with a sealing cover.

[0007] Preferably, the support plate is rectangular in shape, the metering pump body is located at the right end of the connecting plate, and the lower end of the pump head is fixedly connected to a discharge pipe.

[0008] Preferably, the connecting flange is in the shape of a circular ring, the connecting plate is in the shape of a rectangle, and a controller is fixedly connected to the front end of the vacuum pump.

[0009] Preferably, the aperture of the first filter plate is larger than that of the third filter plate, the aperture of the second filter plate is smaller than that of the third filter plate, the number of the spikes is a plurality, and the shape of the spikes is triangular.

[0010] Preferably, the third filter plate is located inside the suction pipe, the outer side of the third filter plate is slidably connected to the inner wall of the suction pipe, the right end of the elastic telescopic hose is fixedly connected with a sealing cover, and the sealing cover is located at the left end of the air remover.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, by arranging the degassing pipe, the air pump, the elastic telescopic hose, the second electric telescopic rod and the sealing cover, when bubbles accumulate in the pump head and cavitation occurs, the staff will remove the sealing cover by hand, and then start the second electric telescopic rod, which will drive the sealing cover to move to the right so that the sealing cover is aligned with the opening at the left end of the degassing pipe for sealing, and then start the air pump through the controller, and the air pump will extract the bubbles in the pump head through the elastic telescopic hose, the sealing cover, the degassing pipe and the suction pipe. This operation process does not require the pump head to be disassembled to eliminate the bubbles in the pump head, thereby reducing the number of times the pump head is disassembled, reducing the loss of the pump head, and extending the service life of the pump head. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 A schematic diagram of the structure at A;

[0015] Figure 3 For this utility model Figure 1 Schematic diagram of the structure at point B.

[0016] In the figure: 1. support plate; 2. metering pump body; 3. pump head; 4. suction pipe; 5. connecting flange; 6. alkali solution delivery pipe; 7. air remover; 8. connecting plate; 9. vacuum pump; 10. first filter plate; 11. spikes; 12. second filter plate; 13. first electric telescopic rod; 14. third filter plate; 15. elastic telescopic hose; 16. second electric telescopic rod; 17. sealing cover; 18. connecting block; 19. rubber rope; 20. sealing cover. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3 , the utility model provides a technical solution:

[0019] A diaphragm metering pump with a cavitation eliminator comprises a support plate 1, a metering pump body 2, a pump head 3, a suction pipe 4 and an alkali solution delivery pipe 6, wherein the upper end of the support plate 1 is fixedly connected to the metering pump body 2, the left end of the metering pump body 2 is fixedly connected to the pump head 3, the upper end of the pump head 3 is fixedly connected to the suction pipe 4, the outer side of the suction pipe 4 is fixedly connected to a connecting flange 5, the inner side of the connecting flange 5 is fixedly connected to the alkali solution delivery pipe 6, the left end of the suction pipe 4 is fixedly connected to a degassing pipe 7, the upper end of the support plate 1 is fixedly connected to a connecting plate 8, the right end of the connecting plate 8 is fixedly connected to an exhaust fan 9, the inner wall of the suction pipe 4 is fixedly connected to a first filter plate 10, and the first A spike 11 is fixedly connected to the upper end of the filter plate 10, a second filter plate 12 is fixedly connected to the inner wall of the suction pipe 4, a first electric telescopic rod 13 is fixedly connected to the upper end of the second filter plate 12, a third filter plate 14 is fixedly connected to the upper end of the first electric telescopic rod 13, an elastic telescopic hose 15 is fixedly connected to the right end of the vacuum pump 9, a second electric telescopic rod 16 is fixedly connected to the right end of the vacuum pump 9, a sealing cover 17 is fixedly connected to the right end of the second electric telescopic rod 16, a connecting block 18 is fixedly connected to the lower end of the air remover 7, a rubber rope 19 is fixedly connected to the left end of the connecting block 18, and a sealing cover 20 is fixedly connected to the other end of the rubber rope 19.

[0020] The support plate 1 is rectangular in shape, the metering pump body 2 is located at the right end of the connecting plate 8, the lower end of the pump head 3 is fixedly connected to the discharge pipe, the connecting flange 5 is annular in shape, the connecting plate 8 is rectangular in shape, the front end of the vacuum pump 9 is fixedly connected to the controller, the aperture of the first filter plate 10 is larger than the third filter plate 14, the aperture of the second filter plate 12 is smaller than the third filter plate 14, the number of spikes 11 is a number, the shape of the spikes 11 is triangular, the third filter plate 14 is located inside the suction pipe 4, the outer side of the third filter plate 14 is slidably connected to the inner wall of the suction pipe 4, the right end of the elastic telescopic hose 15 is fixedly connected to the sealing cover 17, and the sealing cover 17 is located in the air outlet pipe 7, the upper end of the support plate 1 is fixedly connected with a metering pump body 2, the left end of the metering pump body 2 is fixedly connected with a pump head 3, the upper end of the pump head 3 is fixedly connected with a suction pipe 4, the outer side of the suction pipe 4 is fixedly connected with a connecting flange 5, the inner side of the connecting flange 5 is fixedly connected with a lye delivery pipe 6, the left end of the suction pipe 4 is fixedly connected with a degassing pipe 7, and the degassing pipe 7, the air pump 9, the elastic telescopic hose 15, the second electric telescopic rod 16 and the sealing cover 17 are conveniently arranged. When bubbles accumulate inside the pump head 3 and cavitation occurs, the staff will remove the sealing cover 20 by hand, and then start the second electric telescopic rod 16, and the second electric telescopic rod 16 drives The sealing cover 17 moves to the right so that the sealing cover 17 is aligned with the opening at the left end of the degassing pipe 7 for sealing, and then the vacuum pump 9 is started through the controller. The vacuum pump 9 extracts the bubbles inside the pump head 3 through the elastic telescopic hose 15, the sealing cover 17, the degassing pipe 7 and the suction pipe 4. This operation process does not require the pump head 3 to be disassembled to remove the bubbles inside the pump head 3, thereby reducing the number of disassembly times of the pump head 3, reducing the loss of the pump head 3, and extending the service life of the pump head 3; the upper end of the support plate 1 is fixedly connected to the connecting plate 8, the right end of the connecting plate 8 is fixedly connected to the vacuum pump 9, and the inner wall of the suction pipe 4 is fixedly connected to the first filter plate 10. A spike 11 is fixedly connected to the upper end of the first filter plate 10, a second filter plate 12 is fixedly connected to the inner wall of the suction pipe 4, a first electric telescopic rod 13 is fixedly connected to the upper end of the second filter plate 12, a third filter plate 14 is fixedly connected to the upper end of the first electric telescopic rod 13, an elastic telescopic hose 15 is fixedly connected to the right end of the vacuum pump 9, a second electric telescopic rod 16 is fixedly connected to the right end of the vacuum pump 9, a sealing cover 17 is fixedly connected to the right end of the second electric telescopic rod 16, a connecting block 18 is fixedly connected to the lower end of the air remover 7, a rubber rope 19 is fixedly connected to the left end of the connecting block 18, and a sealing cover 20 is fixedly connected to the other end of the rubber rope 19.

[0021] Working process: When the device is in use, the external power supply is energized, the upper end of the support plate 1 is fixedly connected to the metering pump body 2, the left end of the metering pump body 2 is fixedly connected to the pump head 3, the upper end of the pump head 3 is fixedly connected to the suction pipe 4, the outer side of the upper end of the suction pipe 4 is fixedly connected to the connecting flange 5, the inner side of the connecting flange 5 is fixedly connected to the alkali solution delivery pipe 6, the valve at the right end of the alkali solution delivery pipe 6 is opened, the alkali solution flows into the suction pipe 4 through the alkali solution delivery pipe 6, the metering pump body 2 is started, the metering pump body 2 flows the alkali solution in the suction pipe 4 into the pump head 3, the lower end of the pump head 3 is fixedly connected to the discharge pipe, and the alkali solution flows out from the discharge pipe. There will be some bubbles inside the alkali solution during the flow process. The inner wall of the suction pipe 4 is fixedly connected with a first filter plate 10 and a second filter plate 12. The upper end of the first filter plate 10 is fixedly connected with a spike 11. The spike 11 punctures the bubbles to reduce the bubbles in the alkali solution. Then the alkali solution flows between the first filter plate 10 and the second filter plate 12. The upper end of the second filter plate 12 is fixedly connected with a first electric telescopic rod 13. The upper end of the first electric telescopic rod 13 is fixedly connected with a third filter plate 14. The first electric telescopic rod 13 is started, and the first electric telescopic rod 13 drives the third filter plate 14 to move up and down. The third filter plate 14 cooperates with the first filter plate 10, and the third filter plate 14 removes the remaining bubbles. The air bubbles are squeezed out to eliminate them and reduce the bubbles in the pump head 3. However, after the metering pump body 2 is used for a long time, some bubbles will still accumulate inside the pump head 3 to form cavities, which will cause the metering pump body 2 to be unable to be used normally. The upper end of the support plate 1 is fixedly connected to a connecting plate 8, the right end of the connecting plate 8 is fixedly connected to an air pump 9, the front end of the air pump 9 is fixedly connected to a controller, the right end of the air pump 9 is fixedly connected to an elastic telescopic hose 15 and a second electric telescopic rod 16, the right ends of the elastic telescopic hose 15 and the second electric telescopic rod 16 are fixedly connected to a sealing cover 17, the lower end of the air remover 7 is fixedly connected to a connecting block 18, and the left end of the connecting block 18 is fixedly connected to a rubber rope 19. The other end of the rubber rope 19 is fixedly connected with a sealing cover 20. The staff removes the sealing cover 20 by hand and then starts the second electric telescopic rod 16. The second electric telescopic rod 16 drives the sealing cover 17 to move to the right, so that the sealing cover 17 is aligned with the opening at the left end of the degassing pipe 7 for sealing. Then the vacuum pump 9 is started through the controller. The vacuum pump 9 extracts the bubbles inside the pump head 3 through the elastic telescopic hose 15, the sealing cover 17, the degassing pipe 7 and the suction pipe 4. This operation process does not require the pump head 3 to be disassembled to remove the bubbles inside the pump head 3, thereby reducing the number of disassembly times of the pump head 3, reducing the loss of the pump head 3, and extending the service life of the pump head 3.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A diaphragm metering pump with a cavitation eliminator, comprising a support plate (1), a metering pump body (2), a pump head (3), a suction pipe (4) and an alkali solution delivery pipe (6), characterized in that: The upper end of the support plate (1) is fixedly connected to a metering pump body (2); the left end of the metering pump body (2) is fixedly connected to a pump head (3); the upper end of the pump head (3) is fixedly connected to a suction pipe (4); the outer side of the suction pipe (4) is fixedly connected to a connecting flange (5); the inner side of the connecting flange (5) is fixedly connected to an alkali solution delivery pipe (6); the left end of the suction pipe (4) is fixedly connected to a degassing pipe (7); the upper end of the support plate (1) is fixedly connected to a connecting plate (8); the right end of the connecting plate (8) is fixedly connected to an exhaust fan (9); the inner wall of the suction pipe (4) is fixedly connected to a first filter plate (10); the upper end of the first filter plate (10) is fixedly connected to a spike (11); A second filter plate (12) is fixedly connected to the inner wall of the inlet pipe (4); a first electric telescopic rod (13) is fixedly connected to the upper end of the second filter plate (12); a third filter plate (14) is fixedly connected to the upper end of the first electric telescopic rod (13); an elastic telescopic hose (15) is fixedly connected to the right end of the vacuum pump (9); a second electric telescopic rod (16) is fixedly connected to the right end of the vacuum pump (9); a sealing cover (17) is fixedly connected to the right end of the second electric telescopic rod (16); a connecting block (18) is fixedly connected to the lower end of the air remover pipe (7); a rubber rope (19) is fixedly connected to the left end of the connecting block (18); and a sealing cover (20) is fixedly connected to the other end of the rubber rope (19).

2. A diaphragm metering pump with a cavitation eliminator according to claim 1, characterized in that: The support plate (1) has a rectangular shape, the metering pump body (2) is located at the right end of the connecting plate (8), and the lower end of the pump head (3) is fixedly connected to a discharge pipe.

3. A diaphragm metering pump with a cavitation eliminator according to claim 1, characterized in that: The connecting flange (5) has a circular ring shape, the connecting plate (8) has a rectangular shape, and a controller is fixedly connected to the front end of the air pump (9).

4. A diaphragm metering pump with a cavitation eliminator according to claim 1, characterized in that: The aperture of the first filter plate (10) is larger than that of the third filter plate (14), the aperture of the second filter plate (12) is smaller than that of the third filter plate (14), the spikes (11) are of a certain number, and the spikes (11) are triangular in shape.

5. A diaphragm metering pump with a cavitation eliminator according to claim 1, characterized in that: The third filter plate (14) is located inside the suction pipe (4), the outer side of the third filter plate (14) is slidably connected to the inner wall of the suction pipe (4), the right end of the elastic telescopic hose (15) is fixedly connected to a sealing cover (17), and the sealing cover (17) is located at the left end of the air remover pipe (7).

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