Booster pump

Abstract

The utility model discloses a booster pump, relates to booster pump technical field, including transmission subassembly, pump head, diaphragm, piston push block, inner ring sealing rib and outer ring sealing rib, said pump head is installed in said transmission subassembly, is equipped with water inlet and water outlet, said diaphragm is installed in said pump head facing said transmission subassembly side, said piston push block is equipped with the water inlet and the water outlet, said piston push block is equipped with the water inlet and the water outlet, said piston push block is equipped with the water inlet and the water outlet. The water inlet and the water outlet are communicated with the booster pump, the diaphragm is provided with an installation through hole, the piston push block penetrates through the installation through hole through a connecting piece to be connected to the transmission assembly, the transmission assembly drives the piston push block to move, and the piston push block is connected to the booster pump. The inner ring sealing rib and the outer ring sealing rib are arranged on the side, facing the diaphragm, of the piston push block and / or the side, facing the piston push block, of the diaphragm correspondingly. According to the technical scheme, the sealing effect of the joint of the diaphragm and the piston push block is improved.

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 main principle of the booster pump is to increase the pressure at the water outlet on the pump body by driving the diaphragm and the piston on the diaphragm through the driving structure. However, due to the high pressure of the water flow during operation of the existing booster pump, leakage is prone to occur at the connection between the diaphragm and the piston of the booster pump when it is under high pressure, which causes water to flow into the motor of the booster pump, thereby reducing the service life of the booster pump. Utility Model Content

[0003] The main purpose of the utility model is to provide a booster pump, aiming to improve the sealing effect of the connection between the diaphragm and the piston push block.

[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 is mounted on the transmission assembly, and the pump head is provided with a water inlet and a water outlet;

[0007] A diaphragm, the diaphragm is installed on a side of the pump head facing the transmission assembly and encloses the pump head to form a booster chamber, the water inlet and the water outlet are both connected to the booster pump, and the diaphragm is provided with a mounting through hole;

[0008] A piston push block, wherein the piston push block is connected to the transmission assembly through a connecting piece passing through the mounting through hole, and the transmission assembly drives the piston push block to move so as to adjust the volume of the boost chamber; and

[0009] The inner ring sealing rib and the outer ring sealing rib are respectively arranged on the side of the piston push block facing the diaphragm and / or the side of the diaphragm facing the piston push block.

[0010] In one embodiment, the free ends of the inner ring sealing rib and the outer ring sealing rib are both arranged in an arc shape.

[0011] In one embodiment, an outer ring groove is provided on the side of the diaphragm facing the piston push block, the mounting through hole is located on the groove wall of the outer ring groove, and an outer ring boss is provided on the side of the piston push block facing the diaphragm, and the outer ring boss is positioned in the outer ring groove.

[0012] In one embodiment, an inner ring boss is provided on the groove wall of the outer ring groove, the inner ring boss is arranged around the mounting through hole, an inner ring groove is provided on the side of the outer ring boss facing the outer ring groove, the inner ring sealing rib is provided on the groove wall of the inner ring groove, the outer ring sealing rib is provided on the outer ring boss, and the inner ring boss is positioned in the inner ring groove.

[0013] In one embodiment, the groove depth of the inner ring groove is L1, the height of the inner ring sealing rib is h1, and L1>h1.

[0014] In one embodiment, the height of the outer ring sealing rib is h2, and the minimum distance between the outer peripheral wall of the outer ring sealing rib and the outer peripheral wall of the outer ring boss is s1, s1>h2.

[0015] In one embodiment, the height of the outer ring sealing rib is h2, the minimum distance between the outer peripheral wall of the outer ring sealing rib and the outer peripheral wall of the outer ring boss is s1, the groove width of the outer ring groove is w1, and w1-s1>h2.

[0016] In one embodiment, the minimum distance between the inner circumferential wall of the inner ring sealing rib and the inner circumferential wall of the inner ring groove is s2, and s2>0.

[0017] In one embodiment, the groove depth of the inner ring groove is L1, the height of the inner ring boss is L2, L2>L1; and / or the groove depth of the outer ring groove is L3, the groove depth of the inner ring groove is L1, L3>L1.

[0018] In one embodiment, one of the mutually facing sides of the piston push block and the diaphragm is provided with a limiting column, and the other one is provided with a limiting groove, and the limiting column is limited in the limiting groove.

[0019] The booster pump in the technical solution of the utility model comprises a transmission assembly, a pump head, a diaphragm, a piston push block, an inner ring sealing rib and an outer ring sealing rib, the pump head is mounted on the transmission assembly, a water inlet and a water outlet are arranged on the pump head, the diaphragm is mounted on the side of the pump head facing the transmission assembly, and is enclosed with the pump head to form a booster chamber, the water inlet and the water outlet are both connected to the booster pump, a mounting through hole is arranged on the diaphragm, the piston push block is connected to the transmission assembly through the mounting through hole via a connecting piece, and the transmission assembly drives the piston push block to move to adjust the volume of the booster chamber, thereby increasing The pressure of water at the water outlet; further, the inner ring sealing rib and the outer ring sealing rib are respectively arranged on the side of the piston push block facing the diaphragm and / or the side of the diaphragm facing the piston push block. When the piston push block is fixed to the transmission assembly, the inner ring sealing rib and the outer ring sealing rib are both sealed against the periphery of the mounting through hole. By simultaneously arranging the outer ring sealing rib and the inner ring sealing rib between the piston push block and the diaphragm, the sealing effect of the connection between the diaphragm and the piston push block is improved, thereby reducing the possibility of leakage of the booster pump, thereby improving the safety and service life of the booster pump. 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 The structural diagram of the middle piston push block;

[0025] Figure 5 for Figure 4 A cross-sectional view from one perspective;

[0026] Figure 6 for Figure 1 Schematic diagram of the structure of the middle diaphragm;

[0027] Figure 7 for Figure 6 A cross-sectional view from one perspective;

[0028] Figure 8 for Figure 7 A partial enlarged view of point B in the middle.

[0029] Description of Figure Numbers:

[0030] 1. Pump head; 11. Water inlet; 12. Water outlet; 13. Pressurization chamber; 2. Piston valve seat; 3. Diaphragm; 31. Mounting through hole; 32. Inner ring boss; 33. Outer ring groove; 34. Limiting column; 4. Piston push block; 41. Inner ring sealing rib; 42. Outer ring sealing rib; 43. Inner ring groove; 44. Outer ring boss; 45. Limiting groove; 5. Connecting parts.

[0031] 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

[0032] 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.

[0033] 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.

[0034] 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.

[0035] The utility model provides a booster pump, comprising:

[0036] Transmission components;

[0037] A pump head 1, wherein the pump head 1 is mounted on the transmission assembly and is provided with a water inlet 11 and a water outlet 12;

[0038] The diaphragm 3 is installed on the side of the pump head 1 facing the transmission assembly, and is enclosed with the pump head 1 to form a booster chamber 13. The water inlet 11 and the water outlet 12 are both connected to the booster pump, and the diaphragm 3 is provided with a mounting through hole 31;

[0039] A piston push block 4, wherein the piston push block 4 is connected to the transmission assembly through the connecting member 5 and passes through the mounting through hole 31, and the transmission assembly drives the piston push block 4 to move so as to adjust the volume of the boost chamber 13; and

[0040] The inner ring sealing rib 41 and the outer ring sealing rib 42 are respectively arranged on the side of the piston push block 4 facing the diaphragm 3 and / or the side of the diaphragm 3 facing the piston push block 4.

[0041] The booster pump in the technical solution of the utility model comprises a transmission assembly, a pump head 1, a diaphragm 3, a piston push block 4, an inner ring sealing rib 41 and an outer ring sealing rib 42, the pump head 1 is installed on the transmission assembly, and a water inlet 11 and a water outlet 12 are provided on the pump head 1, the diaphragm 3 is installed on the side of the pump head 1 facing the transmission assembly, and is enclosed with the pump head 1 to form a booster chamber 13, the water inlet 11 and the water outlet 12 are both connected to the booster pump, the diaphragm 3 is provided with a mounting through hole 31, the piston push block 4 is connected to the transmission assembly through the mounting through hole 31 via a connector 5, and the transmission assembly drives the piston push block 4 to move to adjust the volume of the booster chamber 13, thereby And increase the pressure of water at the water outlet 12; further, the inner ring sealing rib 41 and the outer ring sealing rib 42 are respectively arranged on the side of the piston push block 4 facing the diaphragm 3 and / or the side of the diaphragm 3 facing the piston push block 4. When the piston push block 4 is fixed to the transmission assembly, the inner ring sealing rib 41 and the outer ring sealing rib 42 are both sealed against the periphery of the mounting through hole 31. By simultaneously arranging the outer ring sealing rib 42 and the inner ring sealing rib 41 between the piston push block 4 and the diaphragm 3, the sealing effect of the connection between the diaphragm 3 and the piston push block 4 is improved, thereby reducing the possibility of leakage of the booster pump, thereby improving the safety and service life of the booster pump.

[0042] In one embodiment, the free ends of the inner ring sealing rib 41 and the outer ring sealing rib 42 are both arranged in an arc shape. That is, the inner ring sealing rib 41 and the outer ring sealing rib 42 are arranged in an arc shape toward one side of the diaphragm 3; it can be understood that the diaphragm 3 is made of a flexible material or an elastic material, so the diaphragm 3 is deformed after being squeezed by the inner ring sealing rib 41 and the outer ring sealing rib 42, and therefore, the contact surface between the inner ring sealing rib 41 and the outer ring sealing rib 42 and the diaphragm 3 after the arc setting is larger, and the sealing effect is better. At the same time, when the arc-shaped sealing rib is subjected to pressure, it can distribute the pressure more evenly over the entire contact surface, thereby avoiding sealing failure caused by excessive local pressure. If the corners of the sealing rib are set to right angles, the stress is mainly concentrated at the corners, which can easily cause damage to the diaphragm 3; therefore, the arc-shaped sealing rib also increases the service life of the diaphragm 3.

[0043] Furthermore, the diaphragm 3 is provided with an outer ring groove 33 on the side facing the piston push block 4, the mounting through hole 31 is located on the groove wall of the outer ring groove 33, and the piston push block 4 is provided with an outer ring boss 44 on the side facing the diaphragm 3, and the outer ring boss 44 is positioned in the outer ring groove 33. By providing the outer ring boss 44 and the outer ring groove 33, the piston push block 4 and the diaphragm 3 can be well limited and fixed, which can facilitate the installation of the piston push block 4, prevent the piston push block 4 from being installed in the wrong position, and improve the installation efficiency of the user; at the same time, it can also prevent the valve seat push block from deviating from the predetermined position, thereby improving the stability of the piston push block 4.

[0044] In one embodiment, the inner ring sealing rib 41 and the outer ring sealing rib 42 are both arranged at one end of the outer ring boss 44 facing the diaphragm 3. By arranging the inner ring sealing rib 41 and the outer ring sealing rib 42 on the outer ring boss 44, the water flow path is increased, thereby increasing the sealing effect between the piston push block 4 and the diaphragm 3; at the same time, by arranging the outer ring groove 33, the top surface and the bottom wall of the outer ring groove 33 form two high and low surfaces, thereby effectively blocking the possibility of water leakage from the installation gap between the piston push block 4 and the diaphragm 3, thereby improving the sealing between the piston push block 4 and the diaphragm 3, thereby reducing the risk of water ingress to the motor, thereby improving the safety, reliability and service life of the booster pump.

[0045] In another embodiment, the groove wall of the outer ring groove 33 is provided with an inner ring boss 32, the inner ring boss 32 is arranged around the installation through hole 31, the inner ring groove 43 is provided on the side of the outer ring boss 44 facing the outer ring groove 33, the inner ring sealing rib 41 is arranged on the groove wall of the inner ring groove 43, the outer ring sealing rib 42 is arranged on the outer ring boss 44, and the inner ring boss 32 is positioned in the inner ring groove 43. On the one hand, the cooperation between the outer ring boss 44 and the outer ring groove 33, and the cooperation between the inner ring boss 32 and the inner ring groove 43 can play a good role in limiting and fixing, which can facilitate the installation of the piston push block 4, prevent the piston push block 4 from being installed in the wrong position, and improve the installation efficiency of the user; at the same time, it can also prevent the piston push block 4 from deviating from the predetermined position, thereby improving the stability of the piston push block 4.

[0046] Furthermore, the outer ring sealing rib 42 is arranged on the outer ring boss 44, and the inner ring sealing rib 41 is arranged on the bottom wall of the inner ring groove 43. By arranging the outer ring sealing rib 42 and the inner ring sealing rib 41 on two planes with different heights, on the one hand, the path between the outer ring sealing rib 42 and the inner ring sealing rib 41 is increased, so that even if the water flow infiltrates from the outer ring sealing rib 42, the water flow path between the outer ring sealing rib 42 and the inner ring sealing rib 41 can be increased, thereby increasing the sealing effect; at the same time, increasing the path between the outer ring sealing rib 42 and the inner ring sealing rib 41, that is, increasing the contact area between the outer ring boss 44 and the outer ring groove 33, and the inner ring boss 32 and the inner ring groove 43, thereby achieving the sealing effect between the piston push block 4 and the diaphragm 3. On the other hand, the inner ring platform with a higher height also plays a certain water-blocking effect, thereby further increasing the sealing effect between the piston push block 4 and the diaphragm 3.

[0047] Specifically, the groove depth of the inner ring groove 43 is L1, and the height of the inner ring sealing rib 41 is h1, and L1>h1. It can be understood that the diaphragm 3 is made of a flexible material, and the outer ring boss 44 and the inner ring groove 43 are pressurized by the corresponding outer ring groove 33 and inner ring boss 32 on the diaphragm 3, so that the diaphragm 3 is deformed, thereby achieving a sealing effect. Therefore, if L1h1 makes it easier for the groove wall of the inner ring groove 43 to abut against the diaphragm 3, thereby improving the sealing effect between the piston push block 4 and the diaphragm 3, thereby improving the installation, reliability and service life of the motor. The flexible material may be TPV material, which is a polymer elastomer material composed of highly vulcanized rubber particles dispersed in a continuous thermoplastic phase, so that it is not easily damaged under high water pressure, thereby improving the sealing effect and service life of the diaphragm 3.<h1>

[0048] Specifically, the height of the outer ring sealing rib 42 is h2, and the minimum spacing between the outer peripheral wall of the outer ring sealing rib 42 and the outer peripheral wall of the outer ring boss 44 is s1, s1>h2. It can be understood that the outer ring sealing rib 42 and / or the inner ring sealing rib 41 can be made of a flexible material or a hard material; when the outer ring sealing rib 42 is made of a flexible material, when the piston push block 4 is sealed and installed on the diaphragm 3, the outer ring sealing rib 42 will be deformed under a large pressure, and if s1<h2, the outer ring sealing rib 42 will push the side wall of the outer ring groove 33 outward after being squeezed, thereby increasing the gap between the outer ring groove 33 and the outer ring boss, thereby reducing the sealing effect between the piston push block 4 and the diaphragm 3. Therefore, by setting s1>h2, the sealing effect between the piston push block 4 and the diaphragm 3 is increased, thereby reducing the possibility of water leakage into the motor, thereby improving the stability, reliability and service life of the motor.

[0049] In one embodiment, the groove width of the inner ring groove 43 is w1, and the width of the inner ring boss 32 is w2, w1>w2. It can be understood that w1>w2, when the piston push block 4 and the diaphragm 3 are not squeezed, there will be a certain gap between the outer peripheral wall of the inner ring boss 32 and the peripheral wall of the inner ring groove 43. Since the piston push block 4 is generally made of hard material, and the connecting member 5 is generally made of hard material such as screws, when the piston push block 4 and the diaphragm 3 are sealed and abutted, the diaphragm 3 is generally deformed. Therefore, the gap between the outer peripheral wall of the inner ring boss 32 and the peripheral wall of the inner ring groove 43 will be occupied by the inner ring boss 32 on the diaphragm 3 after the compression deformation, thereby preventing the deformation space of the inner ring boss 32 from being too small, which will easily cause damage to the diaphragm 3, thereby increasing the service life of the diaphragm 3. On the other hand, even if the gap between the outer wall of the inner ring boss 32 and the peripheral wall of the inner ring groove 43 is not completely filled by the inner ring boss 32, it can also form a water storage cavity, so that even if a very small amount of water enters between the piston push block 4 and the diaphragm 3 through the first outer ring rib, it can be gathered in the water storage cavity, thereby reducing the possibility of entering the motor through the first inner ring rib, thereby improving the sealing effect between the piston push block 4 and the diaphragm 3, and thereby improving the stability, reliability and service life of the motor.

[0050] Furthermore, the minimum spacing between the inner circumferential wall of the inner ring sealing rib 41 and the inner circumferential wall of the inner ring groove 43 is s2, and s2>0. It can be understood that if s2=0, it means that the inner ring sealing rib 41 is arranged at the edge of the inner ring groove 43, so that the inner ring sealing rib 41 is easily offset in the direction close to the installation through hole 31, and then when the connecting member 5 is installed, the connecting member 5 is easy to generate greater friction between the inner ring sealing rib 41, which will reduce the service life of the inner ring sealing rib 41.

[0051] The depth of the inner ring groove 43 is L1, the height of the inner ring boss 32 is L2, and L2>L1. It can be understood that when the piston push block 4 is connected through the connecting piece 5, the piston push block 4 will squeeze the diaphragm 3 to deform. Therefore, through L2>L1, the deformation of the inner ring boss 32 when the piston push block 4 squeezes the diaphragm 3 is increased, thereby increasing the sealing effect between the piston push block 4 and the diaphragm 3, thereby reducing the possibility of water flowing into the motor from between the piston push block 4 and the diaphragm 3, thereby improving the safety, stability and service life of the motor.

[0052] Furthermore, the groove depth of the outer ring groove 33 is L3, and the groove depth of the inner ring groove 43 is L1, and L3>L1. It can be understood that when the piston push block 4 is connected through the connecting member 5, the piston push block 4 will squeeze the diaphragm 3 to deform. Therefore, through L3>L1, the deformation of the outer ring groove 33 when the piston push block 4 squeezes the diaphragm 3 is increased, thereby increasing the sealing effect between the piston push block 4 and the diaphragm 3, thereby reducing the possibility of water flowing into the motor from between the piston push block 4 and the diaphragm 3, thereby improving the safety, stability and service life of the motor.

[0053] In one embodiment, one of the mutually facing sides of the piston push block 4 and the diaphragm 3 is provided with a limiting column 34 , and the other one is provided with a limiting groove 45 , and the limiting column 34 is limited in the limiting groove 45 . On the one hand, the limit column 34 and the limit groove 45 can play an anti-mistake effect, allowing the user to install the limit column 34 in the correct position at the correct angle, thereby facilitating the user's installation and fixation; on the other hand, the outer ring boss 44 and the inner ring groove 43, the inner ring boss 32 and the inner ring groove 43 only limit the piston push block 4 axially and radially, but the piston push block 4 can still rotate freely in the circumferential direction along the inner ring boss 32. Therefore, by setting the limit column 34 and the limit groove 45, the circumferential limit of the piston push block 4 can also be played, thereby improving the stability and reliability of the connection between the piston push block 4 and the diaphragm 3, thereby reducing the possibility of wear between the piston push block 4 and the diaphragm 3, thereby increasing the service life of the diaphragm 3, improving the sealing effect between the piston push block 4 and the diaphragm 3, and reducing the possibility of water flowing into the motor from between the piston push block 4 and the diaphragm 3, thereby improving the safety, stability and service life of the motor.

[0054] In one embodiment, the pump head 1 includes a pump head 1 seat and a pump head 1 cover, the pump head 1 seat is mounted on the transmission assembly, the pump head 1 cover is mounted on the side of the pump head 1 seat away from the transmission assembly, the diaphragm 3 is clamped and fixed between the pump head 1 cover and the pump head 1 seat, and the water inlet 11 and the water outlet 12 are arranged on the pump head 1 cover. By providing the pump head 1 seat and the pump head 1 cover, it is convenient to disassemble and maintain the inside of the pump head 1, thereby increasing the service life of the booster pump.

[0055] Furthermore, the booster pump also includes a piston valve cover and a piston valve plate. The piston valve cover is installed on the side of the diaphragm 3 facing the pump head 1 cover, and the piston valve cover is located between the diaphragm 3 and the pump head 1 cover. The piston valve plate is movably installed on the piston valve cover. There are multiple piston valve plates, and a piston valve plate is arranged opposite to a piston push block 4. The piston valve cover is provided with multiple water inlet valve ports and multiple water outlet valve ports. The water inlet valve port is connected to the water inlet 11, and the water outlet valve port is connected to the water outlet 12. A piston valve plate corresponds to at least one water inlet valve port, and the piston valve cover and the diaphragm 3 enclose the booster chamber 13.

[0056] The transmission assembly includes a motor, an eccentric wheel and a piston valve seat 2. The eccentric wheel is connected to the output shaft of the motor by transmission. The eccentric wheel is connected to the piston valve seat 2 by rotation through a bearing. The piston push block 4 is fixed to the piston valve seat 2 through a connecting piece 5 and a mounting through hole 31. The operating principle of the booster pump is as follows: the motor drives the eccentric wheel to rotate, and the eccentric wheel drives the piston valve seat 2 and the piston push block 4 to move up and down. When in the suction process, the piston push block 4 and the piston valve seat 2 drive the diaphragm 3 to move down, and the volume of the booster chamber 13 increases, thereby forming a negative pressure area, so that the water flow at the water inlet 11 flows into the booster chamber 13 through the corresponding water inlet valve port. When in the discharge process, the piston push block 4 and the piston valve seat 2 drive the diaphragm 3 to move up, and the volume of the booster chamber 13 decreases, so that the water in the booster chamber 13 is pressurized and discharged through the water outlet valve port and the water outlet 12 in turn under the action of pressure.

[0057] 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 is mounted on the transmission assembly, and the pump head is provided with a water inlet and a water outlet; A diaphragm, the diaphragm is installed on a side of the pump head facing the transmission assembly and encloses the pump head to form a booster chamber, the water inlet and the water outlet are both connected to the booster pump, and the diaphragm is provided with a mounting through hole; A piston push block, wherein the piston push block is connected to the transmission assembly through a connecting piece passing through the mounting through hole, and the transmission assembly drives the piston push block to move so as to adjust the volume of the boost chamber; and The inner ring sealing rib and the outer ring sealing rib are respectively arranged on the side of the piston push block facing the diaphragm and / or the side of the diaphragm facing the piston push block.

2. The booster pump according to claim 1, characterized in that: The free ends of the inner ring sealing rib and the outer ring sealing rib are both arranged in an arc shape.

3. The booster pump according to claim 1, characterized in that: An outer ring groove is provided on one side of the diaphragm facing the piston push block, the mounting through hole is located on the groove wall of the outer ring groove, and an outer ring boss is provided on one side of the piston push block facing the diaphragm, and the outer ring boss is positioned in the outer ring groove.

4. The booster pump according to claim 3, characterized in that: An inner ring boss is provided on the groove wall of the outer ring groove, the inner ring boss is arranged around the mounting through hole, an inner ring groove is provided on the side of the outer ring boss facing the outer ring groove, the inner ring sealing rib is provided on the groove wall of the inner ring groove, the outer ring sealing rib is provided on the outer ring boss, and the inner ring boss is positioned in the inner ring groove.

5. The booster pump according to claim 4, characterized in that: The groove depth of the inner ring groove is L1, the height of the inner ring sealing rib is h1, and L1>h1.

6. The booster pump according to claim 4, characterized in that: The height of the outer ring sealing rib is h2, and the minimum distance between the outer peripheral wall of the outer ring sealing rib and the outer peripheral wall of the outer ring boss is s1, s1>h2.

7. The booster pump according to claim 4, characterized in that: The groove width of the inner ring groove is w1, the width of the inner ring boss is w2, and w1>w2.

8. The booster pump according to claim 4, characterized in that: The minimum distance between the inner circumferential wall of the inner ring sealing rib and the inner circumferential wall of the inner ring groove is s2, and s2>0.

9. The booster pump according to claim 4, characterized in that: The depth of the inner ring groove is L1, the height of the inner ring boss is L2, L2>L1; and / or The groove depth of the outer ring groove is L3, the groove depth of the inner ring groove is L1, and L3>L1.

10. The booster pump according to claim 1, characterized in that: One of the sides of the piston push block and the diaphragm facing each other is provided with a limiting column, and the other side is provided with a limiting groove, and the limiting column is limited in the limiting groove.

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