Booster pump

Abstract

The utility model discloses a booster pump relates to booster pump technical field, including transmission subassembly, pump head, piston bonnet and diaphragm, pump head is installed in transmission subassembly, piston bonnet is installed in the pump head, piston bonnet is equipped with water inlet, water outlet and holding groove, water inlet and water outlet pass through holding groove intercommunication, diaphragm is installed in the pump head, and the diaphragm is equipped with the transmission subassembly. The diaphragm and the groove wall of the containing groove define a pressurizing cavity, the diaphragm is in transmission connection with the transmission assembly, the transmission assembly drives the diaphragm to move so as to adjust the volume of the pressurizing cavity, the groove wall of the containing groove comprises a bottom wall and a side wall, the bottom wall and the diaphragm are oppositely arranged, the side wall abuts against the diaphragm, and the side wall is obliquely arranged; the opening of the accommodating groove is gradually enlarged towards the direction close to the diaphragm; according to the technical scheme, stress concentration between the diaphragm and the piston valve deck is reduced, and the service life of the diaphragm is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of booster pumps, in particular to a booster pump. Background Art

[0002] The operating principle of the booster pump is to drive the diaphragm to reciprocate through the transmission components such as the eccentric structure, thereby changing the volume of the boosting chamber in the booster pump head, so as to pressurize and discharge the water in the boosting chamber. Then, during the movement of the diaphragm, it will often come into contact with the internal components of the booster pump. Especially under high pressure, the contact between the diaphragm and the components will cause greater stress in the local part of the diaphragm, resulting in stress concentration on the diaphragm, which can easily lead to damage of the diaphragm, thereby reducing the service life of the diaphragm. Utility Model Content

[0003] The main purpose of the utility model is to provide a booster pump, aiming to reduce the stress concentration between the diaphragm and the piston valve cover and to increase the service life of the diaphragm.

[0004] In order to achieve the above-mentioned purpose, the booster pump proposed by the utility model comprises:

[0005] Transmission components;

[0006] A pump head, the pump head being mounted on the transmission assembly;

[0007] A piston valve cover, the piston valve cover is mounted on the pump head, a water inlet, a water outlet and a receiving groove are provided on the piston valve cover, the water inlet and the water outlet are connected through the receiving groove; and

[0008] A diaphragm, the diaphragm is mounted on the pump head, and the diaphragm and the groove wall of the accommodating groove enclose a boosting chamber, the diaphragm is in transmission connection with the transmission assembly, and the transmission assembly drives the diaphragm to move so as to adjust the volume of the boosting chamber;

[0009] The groove wall of the receiving groove includes a bottom wall and a side wall, the bottom wall is arranged opposite to the diaphragm, the side wall abuts against the diaphragm, the side wall is inclined, and the opening of the receiving groove is gradually enlarged in the direction close to the diaphragm.

[0010] In one embodiment, the minimum angle between the side wall and the diaphragm is α, 70°≤α<90°.

[0011] In one embodiment, a plurality of accommodating grooves are spaced apart on the piston valve cover, and the side wall includes a first side wall and a second side wall, the first side wall is located in the circumferential direction of the piston valve cover, and the second side wall is used to space two adjacent accommodating grooves, and the first side wall and the second side wall are both inclined.

[0012] In one embodiment, the first side wall and the second side wall transition into each other in an arc shape.

[0013] In one embodiment, a limiting groove is provided on the side of the piston valve cover facing the diaphragm, and the limiting groove is located between two adjacent accommodating grooves. A limiting protrusion is provided on the side of the diaphragm facing the piston valve cover, and one limiting protrusion is provided corresponding to one limiting groove.

[0014] In one embodiment, the end surface of the piston valve cover facing one end of the diaphragm is a first abutting surface, the side wall abuts against the diaphragm through the first abutting surface, and an arc-shaped transition is formed between the first abutting surface and the side wall.

[0015] In one embodiment, the boost pump further includes a first annular rib, and the first annular rib is provided on the first abutting surface.

[0016] In one embodiment, the piston valve cover is further provided with a second abutting surface at one end facing the diaphragm, the second abutting surface extends along the circumference of the piston valve cover, and the distance between the second abutting surface and the diaphragm is greater than the distance between the first abutting surface and the diaphragm.

[0017] In one embodiment, the boost pump further includes a second annular rib, and the second annular rib is provided on the second abutting surface.

[0018] In one embodiment, the piston valve cover also includes a third abutment surface, the first abutment surface and the second abutment surface are connected by the third abutment surface, the maximum thickness of the side wall is h, and the sum of the widths of the first abutment surface, the second abutment surface and the third abutment surface is w, w>h.

[0019] The booster pump in the technical solution of the utility model includes a transmission assembly, a pump head, a piston valve cover and a diaphragm, the pump head is installed on the transmission assembly, the piston valve cover is installed on the pump head, a water inlet, a water outlet and a receiving groove are provided on the piston valve cover, the water inlet and the water outlet are connected through the receiving groove, the diaphragm is installed on the pump head, and the diaphragm and the groove wall of the receiving groove are enclosed to form a booster chamber, the diaphragm is connected to the transmission assembly, and the transmission assembly drives the diaphragm to move to adjust the volume of the booster chamber, so that the water flowing into the booster chamber from the water inlet is pressurized and discharged through the water outlet; further, the groove wall of the receiving groove includes a bottom wall and a side wall, the bottom wall is arranged opposite to the diaphragm, the side wall is abutted against the diaphragm, the side wall is inclined, and the opening of the receiving groove is gradually increased in the direction close to the diaphragm, so that during the pressurization process, the stress distribution on the diaphragm is more uniform, and the local stress concentration generated by the diaphragm at the opening of the receiving groove is reduced, thereby improving the service life of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of an embodiment of a booster pump provided by the utility model;

[0022] Figure 2 for Figure 1 A cross-sectional view of

[0023] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0024] Figure 4 for Figure 1 A structural diagram of the middle piston valve cover from one perspective;

[0025] Figure 5 for Figure 1 A structural diagram of the middle piston valve cover from another perspective;

[0026] Figure 6 for Figure 1 A cross-sectional view of the middle piston valve cover;

[0027] Figure 7 for Figure 1 Schematic diagram of the structure of the middle diaphragm.

[0028] Description of Figure Numbers:

[0029] 1. Pump head; 11. Water inlet pipe; 12. Water outlet pipe; 2. Piston valve cover; 21. Water inlet; 22. Water outlet; 23. Receiving groove; 231. Bottom wall; 232. First side wall; 233. Second side wall; 24. Limiting groove; 251. First abutting surface; 252. Second abutting surface; 253. Third abutting surface; 261. First annular rib; 262. Second annular rib; 3. Diaphragm; 31. Limiting protrusion; 32. Pressurization chamber; 41. Drive motor; 42. Piston valve seat; 43. Piston push block; 44. Piston valve plate; 45. Screws.

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] 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 of 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.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0034] Reference Figures 1 to 3 The utility model provides a booster pump, comprising:

[0035] Transmission components;

[0036] A pump head 1, wherein the pump head 1 is mounted on the transmission assembly;

[0037] A piston valve cover 2, wherein the piston valve cover 2 is mounted on the pump head 1, and is provided with a water inlet 21, a water outlet 22 and a receiving groove 23, wherein the water inlet 21 is connected to the water outlet 22 through the receiving groove 23; and

[0038] The diaphragm 3 is mounted on the pump head 1, and the diaphragm 3 and the groove wall of the accommodating groove 23 enclose a boosting chamber 32, and the diaphragm 3 is in transmission connection with the transmission component, and the transmission component drives the diaphragm 3 to move so as to adjust the volume of the boosting chamber 32;

[0039] The groove wall of the accommodating groove 23 includes a bottom wall 231 and a side wall, the bottom wall 231 is arranged opposite to the diaphragm 3, the side wall abuts against the diaphragm 3, the side wall is inclined, and the opening of the accommodating groove 23 is gradually enlarged toward the direction close to the diaphragm 3.

[0040] The booster pump in the technical solution of the utility model comprises a transmission assembly, a pump head 1, a piston valve cover 2 and a diaphragm 3, the pump head 1 is mounted on the transmission assembly, the piston valve cover 2 is mounted on the pump head 1, a water inlet 21, a water outlet 22 and a receiving groove 23 are provided on the piston valve cover 2, the water inlet 21 and the water outlet 22 are connected through the receiving groove 23, the diaphragm 3 is mounted on the pump head 1, and the diaphragm 3 and the groove wall of the receiving groove 23 are enclosed to form a booster chamber 32, the diaphragm 3 is connected to the transmission assembly, and the transmission assembly drives the diaphragm 3 to move to adjust the capacity of the booster chamber 32. accumulation, so that the water flowing into the boosting chamber 32 from the water inlet 21 is pressurized and discharged through the water outlet 22; further, the groove wall of the receiving groove 23 includes a bottom wall 231 and a side wall, the bottom wall 231 is arranged opposite to the diaphragm 3, the side wall is abutted against the diaphragm 3, the side wall is inclined, and the opening of the receiving groove 23 is gradually enlarged in the direction close to the diaphragm 3, so that during the boosting process, the stress distribution on the diaphragm 3 is more uniform, the local stress concentration generated by the diaphragm 3 at the opening of the receiving groove 23 is reduced, thereby improving the service life of the diaphragm 3.

[0041] Specifically, the minimum angle between the side wall and the diaphragm 3 is α, 70°≤α<90°. By reasonably setting the angle between the side wall and the diaphragm 3, the stress when the diaphragm 3 and the piston valve cover 2 are squeezed is further optimized, so that the stress distribution when the diaphragm 3 and the piston valve cover 2 are squeezed is more uniform, and the local stress concentration generated by the diaphragm 3 at the opening of the receiving groove 23 is further reduced, thereby improving the service life of the diaphragm 3.

[0042] Reference Figures 4 to 7 In one embodiment, a plurality of accommodating grooves 23 are spaced apart on the piston valve cover 2, and the side wall includes a first side wall 232 and a second side wall 233, wherein the first side wall 232 is located in the circumferential direction of the piston valve cover 2, and the second side wall 233 is used to space two adjacent accommodating grooves 23, and the first side wall 232 and the second side wall 233 are both inclined.

[0043] It can be understood that the multiple receiving grooves 23 are respectively enclosed with the diaphragm 3 to form multiple sealed boost chambers 32, and the transmission assembly includes a drive motor 41 and an eccentric structure. The output shaft of the drive motor 41 is connected to the eccentric structure, and the eccentric structure is connected to the diaphragm 3. The drive motor 41 moves eccentrically through the eccentric structure, and then the eccentric structure drives the diaphragm 3 to move. Since the eccentric structure is an eccentric movement, the movement of the diaphragms 3 in the multiple boost chambers 32 is inconsistent. Some boost chambers 32 may be pressurized to discharge water from the water outlet 22, and some boost chambers 32 may be depressurized to absorb water from the water inlet 21. Therefore, by tilting the first side wall 232 and the second side wall 233, when the diaphragm 3 in the corresponding area of ​​each boost chamber 32 moves, the stress distribution between the diaphragm 3 in the corresponding area and the piston valve cover 2 can be more uniform, thereby reducing the local stress concentration generated by the diaphragm 3 at the opening of the receiving groove 23, thereby increasing the service life of the diaphragm 3.

[0044] Furthermore, the first side wall 232 and the second side wall 233 have an arc-shaped transition. By making the first side wall 232 and the second side wall 233 have an arc-shaped transition, it is helpful to reduce the local stress concentration generated by the diaphragm 3 at the opening of the receiving groove 23, thereby helping to reduce the stress of the diaphragm 3 as a whole, thereby increasing the service life of the diaphragm 3. At the same time, the two adjacent second side walls 233 in the same receiving groove 23 also have an arc-shaped transition, which is also to reduce the local stress concentration generated by the diaphragm 3 at the opening of the receiving groove 23, thereby increasing the service life of the diaphragm 3.

[0045] In one embodiment, the piston valve cover 2 is provided with a limiting groove 24 on one side facing the diaphragm 3, and the limiting groove 24 is located between two adjacent receiving grooves 23. The diaphragm 3 is provided with a limiting protrusion 31 on one side facing the piston valve cover 2, and one limiting protrusion 31 is provided corresponding to one limiting groove 24. It can be understood that the limiting protrusion 31 on the diaphragm 3 is made of the same flexible material as the diaphragm 3, and the limiting protrusion 31 is limited in the limiting groove 24 by interference fit, so that the two adjacent receiving grooves 23 are sealed and connected through the cooperation of the limiting protrusion 31 and the limiting groove 24, thereby improving the sealing effect of the diaphragm 3 and the piston valve cover 2; at the same time, the installation method of the limiting protrusion 31 and the limiting groove 24 is simple and quick, thereby facilitating the installation and disassembly of the diaphragm 3, and facilitating the maintenance of the inside of the pump head 1.

[0046] Furthermore, the end surface of the piston valve cover 2 facing one end of the diaphragm 3 is a first abutting surface 251, and the side wall abuts against the diaphragm 3 through the first abutting surface 251, and there is an arc-shaped transition between the first abutting surface 251 and the side wall. It can be understood that by making an arc-shaped transition between the first abutting surface 251 and the side wall, it is avoided that the local stress at the connection between the diaphragm 3 and the first abutting surface 251 and the side wall is too large during the pressurization process. Therefore, by making an arc-shaped transition between the first abutting surface 251 and the side wall, the stress distribution between the diaphragm 3 and the first abutting surface 251 and the side wall is made more uniform, thereby improving the service life of the diaphragm 3.

[0047] Furthermore, the booster pump further includes a first annular rib 261, which is disposed on the first abutting surface 251. By providing the first annular rib 261, on the one hand, the stress distribution of the first abutting surface 251 on the diaphragm 3 is made more uniform, thereby reducing the local stress concentration on the diaphragm 3, thereby increasing the service life of the diaphragm 3; on the other hand, the first annular rib 261, as a part of the piston valve cover 2, enhances the structural stability of the piston valve cover 2, so that the piston valve cover 2 better supports the diaphragm 3, reduces the stress shifting caused by vibration or impact on the diaphragm 3, thereby increasing the service life of the diaphragm 3.

[0048] Furthermore, the piston valve cover 2 is provided with a second abutting surface 252 at one end facing the diaphragm 3, the second abutting surface 252 extends along the circumferential direction of the piston valve cover 2, and the distance between the second abutting surface 252 and the diaphragm 3 is greater than the distance between the first abutting surface 251 and the diaphragm 3. That is, the first abutting surface 251 and the second abutting surface 252 are stepped with different heights. Firstly, the stepped first abutting surface 251 and the second abutting surface 252 increase the hierarchical nature of the abutting surface between the piston valve cover 2 and the diaphragm 3, so that the pressing force of the piston valve seat 42 on the diaphragm 3 is more evenly distributed, thereby reducing local stress concentration, thereby reducing the overall stress level of the diaphragm 3, and further increasing the service life of the diaphragm 3. Secondly, the stepped first abutment surface 251 and the second abutment surface 252 can better adapt to the shape and deformation characteristics of the diaphragm 3. When the diaphragm 3 is bent, the two abutment surfaces of the stepped surface can provide more stable support, reduce the additional stress caused by shape mismatch, and thus reduce the overall stress level of the diaphragm 3, thereby increasing the service life of the diaphragm 3.

[0049] Specifically, the booster pump further includes a second annular rib 262, which is disposed on the second abutting surface 252. By providing the second annular rib 262, on the one hand, the stress distribution of the second abutting surface 252 on the diaphragm 3 is made more uniform, thereby reducing the local stress concentration on the diaphragm 3, thereby increasing the service life of the diaphragm 3; on the other hand, the second annular rib 262, as a part of the piston valve cover 2, enhances the structural stability of the piston valve cover 2, so that the piston valve cover 2 better supports the diaphragm 3, reduces the stress shifting caused by vibration or impact on the diaphragm 3, thereby increasing the service life of the diaphragm 3.

[0050] Furthermore, the piston valve cover 2 further includes a third abutting surface 253, the first abutting surface 251 and the second abutting surface 252 are connected via the third abutting surface 253, the maximum thickness of the side wall is h, the sum of the widths of the first abutting surface 251, the second abutting surface 252 and the third abutting surface 253 is w, w>h. In this way, the contact surface between the piston valve cover 2 and the diaphragm 3 is increased, so that the stress distribution between the piston valve seat 42 and the diaphragm 3 is more uniform, thereby increasing the service life of the diaphragm 3.

[0051] Reference Figures 1 to 3 In one embodiment, the transmission assembly includes a driving motor 41, an eccentric structure, a piston valve seat 42 and a piston push block 43. The pump head 1 is provided with an inlet pipe 11 and a water outlet pipe 12. The inlet pipe 11 is connected to the water inlet 21, and the outlet pipe 12 is connected to the water outlet 22. The output shaft of the driving motor 41 is transmission-connected to the piston valve seat 42 through the eccentric structure. The piston valve seat 42 is connected to the eccentric structure. The piston push block 43 is fixed to the piston valve seat 42 through the screw 45 that passes through the piston push block 43 and the diaphragm 3 in sequence. The driving motor 41 drives the eccentric structure to rotate eccentrically, and the eccentric structure drives the piston valve seat 42 and the piston push block 43 to move back and forth up and down, thereby driving the diaphragm 3 to move back and forth up and down, thereby changing the volume of the boosting chamber 32, and then pressurizing the water entering from the water inlet 21 and discharging it through the water outlet 22.

[0052] Furthermore, the booster pump also includes a piston valve plate 44, which is slidably connected to the piston valve cover 2 and is arranged opposite to the water inlet 21. The pressurized water discharge process of the booster pump is as follows: when the piston push block 43 drives the diaphragm 3 to move downward, the volume of the booster chamber 32 increases, and at this time the piston valve plate 44 is spaced apart from the water inlet 21, so the booster chamber 32 sucks the water at the water inlet 21 into the booster chamber 32; when the piston push block 43 drives the diaphragm 3 to move upward, the volume of the booster chamber 32 decreases, and at this time the piston push block 43 will lift the piston valve plate 44, thereby lifting the piston valve plate 44 to block the water inlet 21, so at this time the water in the booster chamber 32 can only be pressurized and discharged through the water outlet 22.

[0053] It can be understood that the piston valve seat 42 and the piston push block 43 are fixed to the two sides of the diaphragm 3 by screws 45 passing through the diaphragm 3, wherein the piston push block 43 is located in the boosting chamber 32, and the corners of the piston push block 43 and the piston valve seat 42 facing the diaphragm 3 are both arc-shaped. When the diaphragm 3 moves upward, the volume of the boosting chamber 32 decreases, and at this time, the diaphragm 3 mainly contacts with the side of the piston valve seat 42 facing the diaphragm 3; when the diaphragm 3 moves downward, the volume of the boosting chamber 32 increases, and at this time, the diaphragm 3 mainly contacts with the side of the piston push block 43 facing the diaphragm 3. Therefore, by setting the corners of the piston push block 43 and the piston valve seat 42 facing the diaphragm 3 in an arc shape, the stress concentration between the diaphragm 3 and the piston valve cover 2 and the piston push block 43 during the movement of the diaphragm 3 is reduced, thereby improving the service life of the diaphragm 3.

[0054] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A booster pump, characterized in that: include: Transmission components; A pump head, the pump head being mounted on the transmission assembly; A piston valve cover, the piston valve cover is installed on the pump head, and is provided with a water inlet, a water outlet and a receiving groove, the water inlet and the water outlet are connected through the receiving groove; as well as A diaphragm, the diaphragm is mounted on the pump head, and the diaphragm and the groove wall of the accommodating groove enclose a boosting chamber, the diaphragm is in transmission connection with the transmission assembly, and the transmission assembly drives the diaphragm to move so as to adjust the volume of the boosting chamber; The groove wall of the receiving groove includes a bottom wall and a side wall, the bottom wall is arranged opposite to the diaphragm, the side wall abuts against the diaphragm, the side wall is arranged obliquely, and the opening of the receiving groove is gradually increased in the direction close to the diaphragm.

2. The booster pump according to claim 1, characterized in that: The minimum angle between the side wall and the diaphragm is α, 70°≤α<90°.

3. The booster pump according to claim 1, characterized in that: The piston valve cover is provided with a plurality of accommodating grooves at intervals, and the side wall comprises a first side wall and a second side wall, wherein the first side wall is located in the circumferential direction of the piston valve cover, and the second side wall is used to separate two adjacent accommodating grooves, and the first side wall and the second side wall are both arranged at an incline.

4. The booster pump according to claim 3, characterized in that: The first side wall and the second side wall transition into an arc shape.

5. The booster pump according to claim 3, characterized in that: A limiting groove is provided on one side of the piston valve cover facing the diaphragm, and the limiting groove is located between two adjacent accommodating grooves. A limiting protrusion is provided on one side of the diaphragm facing the piston valve cover, and one limiting protrusion is provided corresponding to one limiting groove.

6. The booster pump according to claim 1, characterized in that: The end surface of the piston valve cover facing one end of the diaphragm is a first abutting surface, the side wall abuts against the diaphragm through the first abutting surface, and an arc-shaped transition is formed between the first abutting surface and the side wall.

7. The booster pump according to claim 6, characterized in that: The boost pump further includes a first annular rib, and the first annular rib is arranged on the first abutting surface.

8. The booster pump according to claim 6, characterized in that: A second abutting surface is further provided at one end of the piston valve cover facing the diaphragm. The second abutting surface extends along the circumference of the piston valve cover, and the distance between the second abutting surface and the diaphragm is greater than the distance between the first abutting surface and the diaphragm.

9. The booster pump according to claim 8, characterized in that: The boost pump further includes a second annular rib, and the second annular rib is arranged on the second abutting surface.

10. The booster pump according to claim 8, characterized in that: The piston valve cover also includes a third abutting surface, the first abutting surface and the second abutting surface are connected by the third abutting surface, the maximum thickness of the side wall is h, the sum of the widths of the first abutting surface, the second abutting surface and the third abutting surface is w, w>h.

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