Energy storage circulation pump and hydrogen energy circulation system

Abstract

The utility model discloses an energy storage circulation pump and a hydrogen energy circulation system, belonging to the field of pumping technology. The pump comprises a pump body, a first end cover, a first diaphragm assembly, a connecting rod assembly and an eccentric assembly. The first end cover is arranged on one end of the pump body, the first diaphragm assembly is arranged between the pump body and the first end cover, the connecting rod assembly is arranged in the pump body, the eccentric assembly drives the connecting rod assembly to move, the connecting rod assembly drives the first diaphragm assembly to move, the first diaphragm assembly comprises a first valve plate and a second valve plate, a liquid suction port, a liquid discharge port, a liquid suction cavity, a liquid discharge cavity and a first limiting part are arranged on the pump body, the first valve plate is arranged at one end of the liquid suction cavity to control the opening and closing of the liquid suction cavity, the second valve plate is arranged at one end of the liquid discharge cavity to control the opening and closing of the liquid discharge cavity, the liquid suction port is communicated with the liquid suction cavity, the liquid discharge port is communicated with the liquid discharge cavity, the first limiting part is arranged in the liquid discharge cavity to block the second valve plate from moving into the liquid discharge cavity, and the output liquid amount can be ensured to be stable in long-term use.

Description

Technical Field

[0001] The utility model relates to the technical field of pumping, in particular to an energy storage circulation pump and a hydrogen energy circulation system. Background Art

[0002] A fuel cell is an electrochemical cell that uses materials from outside the cell as active materials for the positive and negative electrodes. The reactions of a fuel cell require the use of hydrogen and oxygen. Hydrogen is oxidized at the negative electrode and oxygen is reduced at the positive electrode. Ions pass through a non-conductive, ion-permeable separator and electrons pass through an external circuit to provide an electric current. In some types of hydrogen fuel cells, hydrogen is formed by a hydrogen-containing fuel supplied to the negative electrode side of the fuel cell. In other types of hydrogen fuel cells, hydrogen is supplied to the fuel cell from a source external to the fuel cell. Alkaline fuel cells require a diaphragm pump to pump alkaline solution. The diaphragm pump is corroded and vibrated when repeatedly pumping alkaline solution during operation, causing the valve core to loosen as the use time increases, and the amount of pumping and suction will change. In order to eliminate the change in the valve core and improve the accuracy of pumping alkaline solution, a diaphragm pump with accurate valve core movement is required.

[0003] The existing patent application with publication number CN109944781A discloses a double-headed diaphragm pump, which includes: a main shell with a accommodating cavity inside; an end cover arranged on the main shell and fixedly assembled with the main shell; a diaphragm member arranged between the main shell and the end cover and surrounded by the end cover to form a cavity for accommodating materials, and used to change the volume of the cavity by its own deformation to achieve the entry and exit of materials; and a driving component arranged on one side of the main shell and detachably assembled with the main shell, with a driving end accommodated in the accommodating cavity and assembled with the diaphragm member, and used to drive the diaphragm member to undergo elastic deformation to change the volume of the cavity. The valve core of the double-headed diaphragm pump is prone to loosening and corrosion due to long-term operation. Utility Model Content

[0004] One of the purposes of the utility model is to provide an energy storage circulation pump, which solves the problem that the valve core of the existing diaphragm pump is easy to loosen during long-term operation, resulting in inaccurate pumping volume.

[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0006] A storage circulation pump comprises a pump body, a first end cover, a first diaphragm assembly, a connecting rod assembly and an eccentric assembly, wherein the first end cover is arranged on one end of the pump body, the first diaphragm assembly is arranged between the pump body and the first end cover, the connecting rod assembly is arranged in the pump body, the eccentric assembly drives the connecting rod assembly to move, and the connecting rod assembly drives the first diaphragm assembly to move, the first diaphragm assembly comprises a first valve plate and a second valve plate, the pump body is provided with a suction port, a discharge port, a suction cavity, a discharge cavity and a first limiting part, the first valve plate is arranged at one end of the suction cavity to control the opening and closing of the suction cavity, the second valve plate is arranged at one end of the discharge cavity to control the opening and closing of the discharge cavity, the suction port is communicated with the suction cavity, the discharge port is communicated with the discharge cavity, and the first limiting part is arranged in the discharge cavity to block the second valve plate from moving into the discharge cavity.

[0007] Furthermore, the pump body is also provided with a power chamber, which is arranged inside the pump body, and the connecting rod assembly and the eccentric assembly are both arranged in the power chamber to increase the movement space.

[0008] Furthermore, the first end cover includes a cover body, a second limiting portion, a concave cavity, a first channel, a compression cavity and a second channel. The second limiting portion is arranged on the cover body, and the position of the second limiting portion is opposite to the suction cavity, blocking the first valve plate from moving to the outside of the suction cavity. The concave cavity is arranged on the cover body, and the position of the concave cavity is opposite to the discharge cavity. The compression cavity is arranged on the cover body, and the position of the compression cavity is opposite to the power cavity. The first channel connects the suction cavity and the compression cavity, and the second channel connects the discharge cavity and the compression cavity for liquid flow.

[0009] Preferably, the second limiting portion includes a protrusion and a center block, the center block is located opposite to the middle of the liquid suction cavity, and the protrusion is arranged around the center block for uniformly contacting the first valve sheet.

[0010] More preferably, two ends of the central block extend outwards and are connected to the protrusions to guide the liquid flowing therethrough.

[0011] Furthermore, the first limiting portion includes a rib and a top core, the rib is arranged on the inner wall of the drainage cavity along the axial direction of the drainage cavity, and the top core is arranged in the middle of the drainage cavity for blocking the second valve plate and the liquid guide.

[0012] Preferably, a support member is provided on the first diaphragm assembly, and the support member is respectively arranged above the first channel and the second channel to prevent the first channel and the second channel from being blocked and deformed, thereby protecting the stability of the flow.

[0013] Preferably, the first diaphragm assembly further comprises a valve body, which is respectively arranged on one end of the liquid suction cavity and one end of the liquid discharge cavity, and is used to cooperate with the first valve plate and the second valve plate to perform opening and closing movements.

[0014] Furthermore, it also includes a second diaphragm assembly and a second end cover, wherein the second end cover is arranged on the other end of the pump body, and the second end cover is opposite to the first end cover, and the second diaphragm assembly is arranged between the second end cover and the pump body, and the liquid can flow through the covers at both ends, thereby increasing the flow rate of the liquid.

[0015] One of the purposes of the utility model is to provide a hydrogen energy circulation system, which solves the problem of unstable flow supply during long-term operation of the existing circulation system.

[0016] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0017] A hydrogen circulation system, including the energy storage circulation pump, can output flow accurately.

[0018] The beneficial effects of the utility model are:

[0019] (1) A first limiter is provided in the discharge cavity of the energy storage circulation pump. The first limiter is arranged in the discharge cavity and can block the second valve plate from moving inward to open the discharge cavity, thereby preventing the second valve plate from moving inward to increase the distance, thereby improving the accuracy of long-term infusion of the diaphragm pump.

[0020] (2) The first end cover of the energy storage circulation pump is provided with a second limiting portion, which can block the first valve plate when it moves outward to open the liquid suction cavity, thereby preventing the first valve plate from moving outward by an increase in distance, thereby improving the accuracy of the infusion volume when the diaphragm pump is used for a long time. The second limiting portion includes a central block and a protrusion arranged around the central block. The protrusion is in direct contact with the central block and the first valve plate, so that the movement of the first valve plate can be blocked evenly, and the first valve plate can be accurately limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An exploded diagram of the energy storage circulation pump provided by the utility model;

[0022] Figure 2 An axonometric diagram of the energy storage circulation pump provided by the utility model;

[0023] Figure 3 A front view of the energy storage circulation pump provided by the utility model;

[0024] Figure 4 A side view of the energy storage circulation pump provided by the utility model;

[0025] Figure 5 for Figure 3 Section view along line AA;

[0026] Figure 6 for Figure 4 Sectional view along line BB;

[0027] Figure 7 An axonometric view of the pump body provided by the utility model;

[0028] Figure 8 A front view of the pump body provided by the utility model;

[0029] Fig. 9 for Figure 8 Sectional view along CC line;

[0030] Fig.10 An axonometric view of a first end cover provided by the utility model;

[0031] Fig.11 This is a front view of the first end cover provided by the utility model.

[0032] Reference numerals:

[0033] 1. Pump body; 11. Suction port; 12. Discharge port; 13. Suction cavity; 14. Discharge cavity; 15. Power cavity; 16. First limiting part; 161. Rib; 162. Top core; 2. First end cover; 21. Cover body; 22. Second limiting part; 221. Protrusion; 222. Center block; 23. Concave cavity; 24. Compression cavity; 25. First channel; 26. Second channel; 3. First diaphragm assembly; 31. Valve body; 32. First valve plate; 33. Support member; 34. Second valve plate; 4. Second end cover; 5. Second diaphragm assembly; 6. Connecting rod assembly; 7. Eccentric assembly; 8. Driver. DETAILED DESCRIPTION

[0034] 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 application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Embodiment 1

[0036] like Figure 1-Figure 11As shown, this embodiment discloses an energy storage circulation pump, including a pump body 1, a first end cover 2, a first diaphragm assembly 3, a connecting rod assembly 6 and an eccentric assembly 7. The first end cover 2 is arranged on one end of the pump body 1, the first diaphragm assembly 3 is arranged between the pump body 1 and the first end cover 2, the connecting rod assembly 6 is arranged in the pump body 1, the eccentric assembly 7 drives the connecting rod assembly 6 to move, the connecting rod assembly 6 drives the first diaphragm assembly 3 to move, the first diaphragm assembly 3 performs reciprocating motion, and the first diaphragm assembly 3 changes the volume to realize the suction of liquid, the first diaphragm assembly 3 includes a first valve plate 32 and a second valve plate 34, and the pump body 1 is provided with a liquid suction port 11, a liquid discharge port 12, a liquid suction cavity 13, and a liquid discharge cavity 14. And the first limiting part 16, the first valve disc 32 is arranged at one end of the suction chamber 13 to control the opening and closing of the suction chamber 13, the second valve disc 34 is arranged at one end of the discharge chamber 14 to control the opening and closing of the discharge chamber 14, the first valve disc 32 moves outward to open the suction chamber 13, and the second valve disc 34 moves inward to open the discharge chamber 14, the suction port 11 is connected with the suction chamber 13, and the discharge port 12 is connected with the discharge chamber 14. The first limiting part 16 is arranged in the discharge chamber 14 to prevent the second valve disc 34 from moving into the discharge chamber 14. After the second valve disc 34 is opened, it is supported by the first limiting part 16, so that the opening and closing size of the second valve disc 34 is always consistent, thereby ensuring the accuracy of the liquid discharge amount.

[0037] Furthermore, a power chamber 15 is provided on the pump body 1. The power chamber 15 is arranged in the pump body 1. The connecting rod assembly 6 and the eccentric assembly 7 are both arranged in the power chamber 15. The side of the power chamber 15 is in contact with the first diaphragm assembly 3, so that the volume change of the power chamber 15 can respectively change the opening and closing states of the suction chamber 13 and the discharge chamber 14 to achieve liquid suction. At the same time, the power chamber 15 leaves space for the deformation of the first diaphragm assembly 3.

[0038] Furthermore, the first end cover 2 includes a cover body 21, a second limiting portion 22, a concave cavity 23, a first channel 25, a compression cavity 24 and a second channel 26. The second limiting portion 22 is arranged on the cover body 21, and the position of the second limiting portion 22 is opposite to the liquid suction cavity 13, and is used to prevent the first valve plate 32 from moving outside the liquid suction cavity 13. After the first valve plate 32 opens the liquid suction cavity 13, the top end of the first valve plate 32 contacts the second limiting portion 22, so that the outward movement distance of the first valve plate 32 is always consistent, thereby improving the accuracy of water absorption. The concave cavity 23 is arranged on the cover body 2 1, and the position of the concave cavity 23 is opposite to the discharge cavity 14, which is used for the deformation of the first diaphragm assembly 3 and the activity space of the liquid, so as to reduce the impact of the liquid on the first diaphragm assembly 3 during liquid absorption. The compression cavity 24 is arranged on the cover body 21, and the position of the compression cavity 24 is opposite to the power cavity 15, which is used for the deformation of the first diaphragm assembly 3 and liquid buffering. The first channel 25 connects the liquid absorption cavity 13 and the compression cavity 24, and the second channel 26 connects the discharge cavity 14 and the compression cavity 24, so that the liquid flows from the liquid absorption cavity 13 to the discharge cavity 14 during the suction process, so as to complete the suction cycle of the liquid.

[0039] Preferably, the second limiting portion 22 includes a protrusion 221 and a center block 222. The position of the center block 222 is opposite to the middle of the liquid suction chamber 13. The protrusion 221 is arranged around the center block 222. There are multiple protrusions 221. The multiple protrusions 221 are used to support the edge portion of the second valve plate 34. The center block 222 is used to support the center portion of the first valve plate 32. There is a gap between the center block 222 and the multiple protrusions 221. The first valve plate 32 is supported evenly and the liquid flow is convenient.

[0040] More preferably, both ends of the central block 222 extend outwardly and are connected to the protrusions 221, and the direction of the central block 222 is the same as the flow direction of the liquid, thereby playing a guiding role and reducing the resistance encountered when the liquid is sucked.

[0041] Furthermore, the first limiting portion 16 includes a rib 161 and a top core 162. The rib 161 is arranged on the inner wall of the drainage cavity 14 along the axial direction of the drainage cavity 14, and the top core 162 is arranged in the middle of the drainage cavity 14. A gap is left between the rib 161 and the top core 162. When the liquid is discharged from the drainage cavity 14, the resistance is small, which can play a guiding role.

[0042] Preferably, a support member 33 is provided on the first diaphragm assembly 3, and the support member 33 is respectively arranged above the first channel 25 and the second channel 26. The support member 33 is clamped on the first end cover 2 to block the first diaphragm assembly 3 from entering the first channel 25 and the second channel 26, ensuring that the channels can maintain stable connectivity when pumping liquid.

[0043] Preferably, the first diaphragm assembly 3 also includes a valve body 31, which is respectively arranged on one end of the suction chamber 13 and one end of the discharge chamber 14. The first valve plate 32 and the second valve plate 34 are umbrella-shaped, both slidably connected to the valve body 31, and the switching directions are opposite.

[0044] More preferably, it also includes a driver 8, which is connected to the pump body 1, and the output end of the driver 8 is connected to the eccentric assembly 7 to provide power for the rotation of the eccentric assembly 7. A bearing is provided on the eccentric assembly 7, and the bearing is located between the eccentric assembly 7 and the connecting rod assembly 6 to avoid direct friction between the eccentric assembly 7 and the connecting rod assembly 6.

[0045] The working process of the energy storage circulation pump is as follows:

[0046] The driver 8 drives the eccentric assembly 7 to rotate, and the eccentric assembly 7 drives the connecting rod assembly 6 to reciprocate. The connecting rod assembly 6 squeezes the first diaphragm assembly 3 to change the volume of the power chamber 15 and the compression chamber 24. When absorbing liquid, the first valve plate 32 on the suction chamber 13 opens, and the liquid enters the suction chamber 13 through the suction port 11, and then enters the compression chamber 24 through the first valve plate 32 through the first channel 25. After the suction is completed, the liquid starts to be discharged. At this time, the first valve plate 32 on the suction chamber 13 is closed, and the second valve plate 34 on the discharge chamber 14 is opened. The liquid enters the discharge chamber 14 through the second channel 26 from the compression chamber 24 through the second valve plate 34, and then is discharged outward through the discharge port 12 on the discharge chamber 14. The reciprocating motion of the connecting rod assembly 6 drives the first diaphragm assembly 3 to compress back and forth, thereby realizing the suction cycle of the liquid.

[0047] Embodiment 2

[0048] The present embodiment discloses an energy storage circulation pump, which is different in that it also includes a second diaphragm assembly 5 and a second end cover 4, the second end cover 4 is arranged on the other end of the pump body 1, and the second end cover 4 is opposite to the first end cover 2, the second diaphragm assembly 5 is arranged between the second end cover 4 and the pump body 1, the second end cover 4 has the same structure as the first end cover 2, and the second diaphragm assembly 5 has the same structure as the first diaphragm assembly 3. More specifically, the two ends of the suction chamber 13 and the discharge chamber 14 are open, respectively connected to the first diaphragm assembly 3 and the second diaphragm assembly 5, so that the liquid can flow through the two end covers during suction, thereby increasing the volume of the pumped liquid.

[0049] Embodiment 3

[0050] This embodiment also discloses a hydrogen circulation system, including an energy storage circulation pump for pumping alkaline solution to ensure normal charging and discharging of the lithium battery.

[0051] According to the disclosure and teaching of the above description, the technical personnel in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes of the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. An energy storage circulation pump, comprising a pump body (1), a first end cover (2), a first diaphragm assembly (3), a connecting rod assembly (6) and an eccentric assembly (7), wherein the first end cover (2) is arranged on one end of the pump body (1), the first diaphragm assembly (3) is arranged between the pump body (1) and the first end cover (2), the connecting rod assembly (6) is arranged in the pump body (1), the eccentric assembly (7) drives the connecting rod assembly (6) to move, and the connecting rod assembly (6) drives the first diaphragm assembly (3) to move, characterized in that: The first diaphragm assembly (3) comprises a first valve plate (32) and a second valve plate (34); the pump body (1) is provided with a liquid suction port (11), a liquid discharge port (12), a liquid suction cavity (13), a liquid discharge cavity (14) and a first limiting portion (16); the first valve plate (32) is arranged at one end of the liquid suction cavity (13) to control the opening and closing of the liquid suction cavity (13); the second valve plate (34) is arranged at one end of the liquid discharge cavity (14) to control the opening and closing of the liquid discharge cavity (14); the liquid suction port (11) is communicated with the liquid suction cavity (13); the liquid discharge port (12) is communicated with the liquid discharge cavity (14); the first limiting portion (16) is arranged in the liquid discharge cavity (14) to prevent the second valve plate (34) from moving into the liquid discharge cavity (14).

2. The energy storage circulation pump according to claim 1, characterized in that: The pump body (1) is also provided with a power chamber (15), the power chamber (15) is arranged in the pump body (1), and the connecting rod assembly (6) and the eccentric assembly (7) are both arranged in the power chamber (15).

3. The energy storage circulation pump according to claim 2, characterized in that: The first end cover (2) comprises a cover body (21), a second limiting portion (22), a concave cavity (23), a first channel (25), a compression cavity (24) and a second channel (26); the second limiting portion (22) is arranged on the cover body (21), and the position of the second limiting portion (22) is opposite to the liquid suction cavity (13), so as to block the first valve plate (32) from moving to the outside of the liquid suction cavity (13); the concave cavity (23) is arranged on the cover body (21), and the position of the concave cavity (23) is opposite to the liquid discharge cavity (14); the compression cavity (24) is arranged on the cover body (21), and the position of the compression cavity (24) is opposite to the power cavity (15); the first channel (25) connects the liquid suction cavity (13) and the compression cavity (24); the second channel (26) connects the liquid discharge cavity (14) and the compression cavity (24).

4. The energy storage circulation pump according to claim 3, characterized in that: The second limiting portion (22) comprises a protrusion (221) and a center block (222); the center block (222) is located opposite to the middle of the liquid suction cavity (13); and the protrusion (221) is arranged around the center block (222).

5. The energy storage circulation pump according to claim 4, characterized in that: Two ends of the central block (222) extend outwards and are connected to the protrusion (221).

6. The energy storage circulation pump according to claim 1, characterized in that: The first limiting portion (16) comprises a rib (161) and a top core (162); the rib (161) is arranged on the inner wall of the drainage cavity (14) along the axial direction of the drainage cavity (14); and the top core (162) is arranged in the middle of the drainage cavity (14).

7. The energy storage circulation pump according to claim 5, characterized in that: The first diaphragm assembly (3) is provided with a support member (33), and the support member (33) is respectively arranged above the first channel (25) and the second channel (26).

8. The energy storage circulation pump according to claim 7, characterized in that: The first diaphragm assembly (3) further comprises a valve body (31), and the valve body (31) is respectively arranged on one end of the liquid suction chamber (13) and one end of the liquid discharge chamber (14).

9. The energy storage circulation pump according to any one of claims 1 to 8, characterized in that: The pump body (1) further comprises a second diaphragm assembly (5) and a second end cover (4), wherein the second end cover (4) is arranged on the other end of the pump body (1), and the second end cover (4) is opposite to the first end cover (2), and the second diaphragm assembly (5) is arranged between the second end cover (4) and the pump body (1).

10. A hydrogen energy circulation system, characterized in that: It comprises the energy storage circulation pump as described in any one of claims 1 to 9.

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