Booster pump

Abstract

The utility model discloses a booster pump, which relates to the technical field of booster pumps and comprises a transmission component, a piston valve seat, a pump head, a diaphragm and a piston push block, the pump head is provided with a water inlet and a water outlet, the diaphragm is mounted on one side of the pump head facing the transmission component, the diaphragm and the pump head define a booster cavity, the water inlet and the water outlet are both communicated with the booster pump, and the piston push block is arranged on the piston valve seat. A mounting through hole is formed in the diaphragm, the piston push block penetrates through the mounting through hole through a connecting piece to be connected to the piston valve seat, at least one of the sides, facing each other, of the piston push block and the diaphragm is provided with a first annular rib, and at least one of the sides, facing each other, of the piston valve seat and the diaphragm is provided with a second annular rib. When the piston push block is fixed to the piston valve seat, the first annular rib and the second annular rib abut against the periphery of the mounting through hole in a sealed mode. According to the technical scheme, the sealing effect of the joints of the diaphragm, the piston push block and the piston valve seat 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, the piston push block and the piston valve seat.

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

[0005] Transmission components;

[0006] A piston valve seat, the piston valve seat being drivingly connected to the transmission assembly;

[0007] 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;

[0008] A diaphragm, wherein the diaphragm is mounted 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; and

[0009] A piston push block, wherein the piston push block is connected to the piston valve seat through the mounting through hole via a connecting piece, and the transmission assembly drives the piston push block to move through the piston valve seat to adjust the volume of the boost chamber;

[0010] Among them, at least one of the sides facing each other of the piston push block and the diaphragm is provided with a first annular rib, and at least one of the sides facing each other of the piston valve seat and the diaphragm is provided with a second annular rib, and when the piston push block is fixed to the piston valve seat, the first annular rib and the second annular rib are both sealed against the periphery of the mounting through hole.

[0011] In one embodiment, the first annular rib includes a first inner ring sealing rib and a first outer ring sealing rib, and the first inner ring sealing rib and the first outer ring sealing rib are both arranged on a side of the piston push block facing the diaphragm.

[0012] In one embodiment, the piston push block is provided with an outer ring boss and an inner ring groove on the side facing the diaphragm, and the inner ring groove is located in the outer ring boss, the diaphragm is provided with an outer ring groove and an inner ring boss on the side facing the piston push block, the outer ring boss is arranged opposite to the outer ring groove, the inner ring boss is arranged opposite to the inner ring groove, the first outer ring sealing rib is arranged on the outer ring boss, and the first inner ring sealing rib is arranged on the bottom wall of the inner ring groove.

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

[0014] In one embodiment, the height of the first outer ring sealing rib is h2, and the minimum distance between the outer peripheral wall of the first 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 first outer ring sealing rib is h2, the minimum distance between the outer peripheral wall of the first 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 groove depth of the inner ring groove is L1, the height of the inner ring boss is L2, and L2>L1.

[0017] In one embodiment, the groove depth of the outer annular groove is L3, the groove depth of the inner annular groove is L1, and L3>L1.

[0018] In one embodiment, the second annular rib includes a second inner ring sealing rib and a second outer ring sealing rib, the diaphragm is provided with a positioning protrusion on one side of the piston valve seat, the piston valve seat is provided with a positioning groove on one side of the diaphragm, and the second inner ring sealing rib and the second outer ring sealing rib are both spaced apart on the bottom wall of the positioning groove.

[0019] In one embodiment, one of the sides of the piston push block and the diaphragm facing each other is provided with a limiting column, and the other one is provided with a limiting groove. When the piston push block is connected to the transmission assembly, the limiting column is limited in the limiting groove.

[0020] The booster pump in the technical solution of the utility model comprises a transmission assembly, a piston valve seat, a pump head, a diaphragm and a piston push block. The piston valve seat is transmission-connected to the transmission assembly, 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 piston valve seat through the mounting through hole through a connecting piece, and the transmission assembly drives the piston push block to move through the piston valve seat to adjust the volume of the booster chamber, thereby increasing the water output at the water outlet pressure; further, at least one of the sides facing each other of the piston push block and the diaphragm is provided with a first annular rib, and at least one of the sides facing each other of the piston valve seat and the diaphragm is provided with a second annular rib. When the piston push block is fixed to the piston valve seat, the first annular rib and the second annular rib are both sealed against the periphery of the mounting through hole, and the first annular rib and the second annular rib are used to perform annular sealing on both sides of the diaphragm, thereby improving the sealing effect between the diaphragm and the piston push block, and between the diaphragm and the piston valve seat, 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

[0021] 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.

[0022] Figure 1 A schematic structural diagram of an embodiment of a booster pump provided by the utility model;

[0023] Figure 2 for Figure 1 A cross-sectional view of

[0024] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0025] Figure 4 for Figure 1 The structural diagram of the middle piston push block;

[0026] Figure 5 for Figure 4 A cross-sectional view from one perspective;

[0027] Figure 6 for Figure 1 Schematic diagram of the structure of the middle diaphragm;

[0028] Figure 7 for Figure 6 A cross-sectional view from one perspective;

[0029] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0030] Fig. 9 for Figure 6 A schematic diagram of the structure from another perspective;

[0031] Fig.10 for Figure 1 Schematic diagram of the structure of the middle piston valve seat;

[0032] Fig.11 for Fig.10 A cross-sectional view from one perspective;

[0033] Fig.12 for Fig.11 A partial enlarged view of point C in the middle;

[0034] Fig.13 for Fig.12 A partial enlarged view of point D in the middle.

[0035] Description of Figure Numbers:

[0036] 1. Pump head; 11. Water inlet; 12. Water outlet; 13. Pressurization chamber; 2. Piston valve seat; 21. Second inner ring sealing rib; 22. Second outer ring sealing rib; 23. Positioning groove; 231. First step; 232. Second step; 24. Water storage tank; 3. Diaphragm; 31. Mounting through hole; 32. Inner ring boss; 33. Outer ring groove; 34. Limiting column; 35. Positioning protrusion; 4. Piston push block; 41. First inner ring sealing rib; 42. First outer ring sealing rib; 43. Inner ring groove; 44. Outer ring boss; 45. Limiting groove; 5. Connector.

[0037] 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

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Reference Figures 1 to 3 The utility model provides a booster pump, comprising:

[0042] Transmission components;

[0043] A piston valve seat 2, wherein the piston valve seat 2 is drivingly connected to the transmission assembly;

[0044] 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;

[0045] The diaphragm 3 is mounted on the side of the pump head 1 facing the transmission assembly and encloses 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; and

[0046] A piston push block 4, wherein the piston push block 4 is connected to the piston valve seat 2 through the mounting through hole 31 via a connecting piece 5, and the transmission assembly drives the piston push block 4 to move via the piston valve seat 2 to adjust the volume of the boost chamber 13;

[0047] Among them, at least one of the sides facing each other of the piston push block 4 and the diaphragm 3 is provided with a first annular rib, and at least one of the sides facing each other of the piston valve seat 2 and the diaphragm 3 is provided with a second annular rib, when the piston push block 4 is fixed to the piston valve seat 2, the first annular rib and the second annular rib are both sealed against the periphery of the mounting through hole 31.

[0048] The booster pump in the technical solution of the utility model includes a transmission assembly, a piston valve seat 2, a pump head 1, a diaphragm 3 and a piston push block 4. The piston valve seat 2 is transmission-connected to the transmission assembly, the pump head 1 is installed on the transmission assembly, 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, a mounting through hole 31 is provided on the diaphragm 3, the piston push block 4 is connected to the piston valve seat 2 through the mounting through hole 31 through the connecting piece 5, and the transmission assembly drives the piston push block 4 to move through the piston valve seat 2 to adjust the volume of the booster chamber 13, thereby Increase the pressure of water at the water outlet 12; further, at least one of the sides facing each other of the piston push block 4 and the diaphragm 3 is provided with a first annular rib, and at least one of the sides facing each other of the piston valve seat 2 and the diaphragm 3 is provided with a second annular rib. When the piston push block 4 is fixed to the piston valve seat 2, the first annular rib and the second annular rib are both sealed against the periphery of the mounting through hole 31, and the first annular rib and the second annular rib are used to perform annular sealing on both sides of the diaphragm 3, thereby improving the sealing effect between the diaphragm 3 and the piston push block 4, and between the diaphragm 3 and the piston valve seat 2, thereby reducing the possibility of leakage of the booster pump, thereby improving the safety and service life of the booster pump.

[0049] Reference Figures 3 to 8 In one embodiment, the first annular rib includes a first inner ring sealing rib 41 and a first outer ring sealing rib 42, and the first inner ring sealing rib 41 and the first outer ring sealing rib 42 are both provided on the side of the piston push block 4 facing the diaphragm 3. It can be understood that by providing the first inner ring sealing rib 41 and the first outer ring sealing rib 42, a double-layer seal is performed between the piston push block 4 and the diaphragm 3, thereby further improving the sealing effect between the piston push block 4 and the diaphragm 3, thereby enabling the diaphragm 3 and the piston push block 4 to achieve a better sealing effect even under high pressure, thereby reducing the possibility of leakage at the diaphragm 3 in the booster pump, thereby reducing the risk of water in the motor, and thereby improving the safety, reliability and service life of the booster pump.

[0050] Further, the piston push block 4 is provided with an outer ring boss 44 and an inner ring groove 43 on the side facing the diaphragm 3, and the inner ring groove 43 is located in the outer ring boss 44, the diaphragm 3 is provided with an outer ring groove 33 and an inner ring boss 32 on the side facing the piston push block 4, the outer ring boss 44 is arranged opposite to the outer ring groove 33, the inner ring boss 32 is arranged opposite to the inner ring groove 43, the first outer ring sealing rib 42 is arranged on the outer ring boss 44, and the first inner ring sealing rib 41 is arranged on the bottom wall of 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.

[0051] Furthermore, the first outer ring sealing rib 42 is arranged on the outer ring boss 44, and the first inner ring sealing rib 41 is arranged on the bottom wall of the inner ring groove 43. By arranging the first outer ring sealing rib 42 and the first inner ring sealing rib 41 on two planes with different heights, on the one hand, the path between the first outer ring sealing rib 42 and the first inner ring sealing rib 41 is increased, so that even if water flows in through the first outer ring sealing rib 42, the water flow path between the first outer ring sealing rib 42 and the first inner ring sealing rib 41 can be increased, thereby increasing the sealing effect; at the same time, increasing the path between the first outer ring sealing rib 42 and the first 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 boss 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.

[0052] Specifically, the groove depth of the inner ring groove 43 is L1, and the height of the first 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>

[0053] Specifically, the height of the first outer ring sealing rib 42 is h2, and the minimum spacing between the outer peripheral wall of the first 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 first outer ring sealing rib 42 and / or the first inner ring sealing rib 41 can be made of a flexible material or a hard material; when the first 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 first outer ring sealing rib 42 will be deformed under a large pressure, and if s1<h2, the first 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.

[0054] 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.

[0055] Furthermore, the minimum spacing between the inner circumferential wall of the inner ring sealing rib and the inner circumferential wall of the inner ring groove 43 is s3, and s3>0. It can be understood that if s3=0, it means that the inner ring sealing rib is arranged at the edge of the inner ring groove 43, so that the inner ring sealing rib 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 ribs, which will reduce the service life of the inner ring sealing ribs.

[0056] 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.

[0057] 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.

[0058] In one embodiment, one of the sides of the piston push block 4 and the diaphragm 3 facing each other is provided with a limiting column 34, and the other side is provided with a limiting groove 45. When the piston push block 4 is connected to the piston valve seat 2, 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.

[0059] Reference Figures 8 to 13 In one embodiment, the second annular rib includes a second inner ring sealing rib 21 and a second outer ring sealing rib 22, and the second inner ring sealing rib 21 and the second outer ring sealing rib 22 are both provided on the side of the piston valve seat 2 facing the diaphragm 3. It can be understood that by providing the second inner ring sealing rib 21 and the second outer ring sealing rib 22, a double-layer seal is performed between the piston valve seat 2 and the diaphragm 3, thereby further improving the sealing effect between the piston valve seat 2 and the diaphragm 3, and thus the diaphragm 3 and the piston valve seat 2 can achieve a good sealing effect even under high pressure, thereby reducing the possibility of leakage at the diaphragm 3 in the booster pump, thereby reducing the risk of water in the motor, and thereby improving the safety, reliability and service life of the booster pump.

[0060] Furthermore, the diaphragm 3 has a positioning protrusion 35 on one side facing the piston valve seat 2, and the piston valve seat 2 has a positioning groove 23 on one side facing the diaphragm 3, and the second inner ring sealing rib 21 and the second outer ring sealing rib 22 are both arranged at intervals on the bottom wall of the positioning groove 23. On the one hand, by providing the positioning protrusion 35 and the positioning groove 23, the piston valve seat 2 and the diaphragm 3 can be well limited and fixed, which can facilitate the installation of the piston valve seat 2, prevent the piston valve seat 2 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. On the other hand, by providing the positioning protrusion 35 and the positioning groove 23, the water flow path is also increased, thereby increasing the sealing effect between the piston valve seat 2 and the diaphragm 3; at the same time, by providing the positioning groove 23, the top surface and the bottom wall of the positioning groove 23 form two high and low surfaces, thereby effectively blocking the possibility of water leakage from the installation gap between the piston valve seat 2 and the diaphragm 3, thereby improving the sealing between the piston valve seat 2 and the diaphragm 3, thereby reducing the risk of water intrusion into the motor, thereby improving the safety, reliability and service life of the booster pump.

[0061] Specifically, the height of the second outer ring sealing rib 22 is h3, and the shortest distance between the outer peripheral wall of the second outer ring sealing rib 22 and the side wall of the positioning groove 23 is s2, s2>h3. It can be understood that the second outer ring sealing rib 22 and / or the second inner ring sealing rib 21 can be made of a flexible material or a hard material; when the second outer ring sealing rib 22 is made of a flexible material, when the piston valve seat 2 is sealed and installed on the diaphragm 3, the second outer ring sealing rib 22 will be deformed under a large pressure, and if s2<h3, the second outer ring sealing rib 22 will push the side wall of the positioning groove 23 outward after being squeezed, thereby increasing the gap between the positioning protrusion 35 and the positioning groove 23, thereby reducing the sealing effect between the piston valve seat 2 and the diaphragm 3. Therefore, by setting s2>h3, the sealing effect between the piston valve seat 2 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.

[0062] In one embodiment, the bottom wall of the positioning groove 23 includes a first step 231 and a second step 232, the second step 232 is arranged around the outer circumference of the first step 231, and the end surface of the first step 231 is lower than the end surface of the second step 232, the second outer ring sealing rib 22 is arranged on the second step 232, and the second inner ring sealing rib 21 is arranged on the first step 231. By arranging the second outer ring sealing rib 22 and the second inner ring sealing rib 21 on two planes with different heights, on the one hand, the path between the second outer ring sealing rib 22 and the second inner ring sealing rib 21 is increased, so that even if water flows in through the second outer ring sealing rib 22, the water flow path between the second outer ring sealing rib 22 and the second inner ring sealing rib 21 can be increased, thereby increasing the sealing effect; at the same time, the path between the second outer ring sealing rib 22 and the second inner ring sealing rib 21 is increased, that is, the contact area between the positioning protrusion 35 and the positioning groove 23 is increased, thereby improving the sealing effect between the piston valve seat 2 and the diaphragm 3. On the other hand, the second step 232 with a relatively high height also plays a certain role in blocking water, thereby further increasing the sealing effect between the piston valve seat 2 and the diaphragm 3 .

[0063] Specifically, the height of the second outer ring sealing rib 22 is h3, and the height of the second inner ring sealing rib 21 is h4, where h3 = h4. Thus, the height of the second outer ring sealing rib 22 is always higher than the height of the second inner ring sealing rib 21, thereby improving the sealing effect between the piston valve seat 2 and the diaphragm 3, and further improving the stability, reliability and service life of the motor.

[0064] In another embodiment, the second inner ring sealing rib 21 and the second outer ring sealing rib 22 are both spaced apart on the groove wall of the positioning groove 23, the height of the second outer ring sealing rib 22 is h3, the height of the second inner ring sealing rib 21 is h4, and h3>h4. By setting the second outer ring sealing rib 22 and the second inner ring sealing rib 21 as two sealing ribs with different heights, and the height of the second outer ring sealing rib 22 is higher than the height of the second inner ring sealing rib 21, even if water flows from the second inner ring sealing rib 21 to the second outer ring sealing rib 22, the second outer ring sealing rib 22 can use the height difference with the second inner ring sealing rib 21 to resist part of the water flow, thereby increasing the sealing effect between the piston valve seat 2 and the diaphragm 3, thereby improving the stability, reliability and service life of the motor.

[0065] Preferably, the second outer ring sealing rib 22, the second step 232 and the first step 231 form a water storage groove 24. It can be understood that by providing the water storage groove 24, even if a small amount of water leaks from the second inner ring sealing rib 21 to between the second outer ring sealing rib 22 and the second inner ring sealing rib 21, the water storage groove 24 can still play a certain role in storing water, thereby reducing the impact and leakage of water flow on the second outer ring sealing rib 22, thereby improving the sealing effect between the piston valve seat 2 and the diaphragm 3, and thereby improving the stability, reliability and service life of the motor.

[0066] Further, the free ends of the first inner ring sealing rib 41, the first outer ring sealing rib 42, the second inner ring sealing rib 21 and the second outer ring sealing rib 22 are arranged in an arc shape, that is, the first inner ring sealing rib 41, the first outer ring sealing rib 42, the second inner ring sealing rib 21 and the second outer ring sealing rib 22 are arranged in an arc shape toward one side of the diaphragm 3; it can be understood that the diaphragm 3 is a flexible material or an elastic material, so the diaphragm 3 is deformed after being squeezed by the first inner ring sealing rib 41, the first outer ring sealing rib 42, the second inner ring sealing rib 21 and the second outer ring sealing rib 22, and therefore, the contact surface between the first inner ring sealing rib 41, the first outer ring sealing rib 42, the second inner ring sealing rib 21 and the second outer ring sealing rib 22 and the diaphragm 3 after the arc shape is arranged is larger, and the sealing effect is better. At the same time, when the arc shape sealing rib is subjected to pressure, it can distribute the pressure more evenly on the entire contact surface, thereby avoiding sealing failure caused by excessive local pressure. If the corners of the sealing rib are set to be right angles, the stress will be mainly concentrated at the corners, which will easily cause the diaphragm 3 to be damaged; therefore, the arc-shaped sealing rib also increases the service life of the diaphragm 3.

[0067] 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.

[0068] 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.

[0069] The transmission assembly includes a motor and an eccentric wheel, the eccentric wheel is connected to the output shaft of the motor by transmission, and the eccentric wheel is connected to the piston valve seat 2 by rotation through a bearing. 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 becomes larger, 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 becomes smaller, 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.

[0070] 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 piston valve seat, the piston valve seat being drivingly connected to the transmission assembly; 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, wherein the diaphragm is mounted 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; and A piston push block, wherein the piston push block is connected to the piston valve seat through the mounting through hole via a connecting piece, and the transmission assembly drives the piston push block to move through the piston valve seat to adjust the volume of the boost chamber; Wherein, at least one of the sides of the piston push block and the diaphragm facing each other is provided with a first annular rib, and at least one of the sides of the piston valve seat and the diaphragm facing each other is provided with a second annular rib.

2. The booster pump according to claim 1, characterized in that: The first annular rib comprises a first inner ring sealing rib and a first outer ring sealing rib, and the first inner ring sealing rib and the first outer ring sealing rib are both arranged on a side of the piston push block facing the diaphragm.

3. The booster pump according to claim 2, characterized in that: The piston push block is provided with an outer ring boss and an inner ring groove on the side facing the diaphragm, and the inner ring groove is located in the outer ring boss; the diaphragm is provided with an outer ring groove and an inner ring boss on the side facing the piston push block, the outer ring boss is arranged opposite to the outer ring groove, the inner ring boss is arranged opposite to the inner ring groove, the first outer ring sealing rib is arranged on the outer ring boss, and the first inner ring sealing rib is arranged on the bottom wall of the inner ring groove.

4. The booster pump according to claim 3, characterized in that: The groove depth of the inner ring groove is L1, the height of the first inner ring sealing rib is h1, and L1>h1.

5. The booster pump according to claim 3, characterized in that: The height of the first outer ring sealing rib is h2, and the minimum distance between the outer peripheral wall of the first outer ring sealing rib and the outer peripheral wall of the outer ring boss is s1, s1>h2.

6. The booster pump according to claim 3, characterized in that: The height of the first outer ring sealing rib is h2, the minimum distance between the outer peripheral wall of the first 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.

7. The booster pump according to claim 3, characterized in that: The depth of the inner ring groove is L1, the height of the inner ring boss is L2, and L2>L1.

8. The booster pump according to claim 3, characterized in that: The groove depth of the outer ring groove is L3, the groove depth of the inner ring groove is L1, and L3>L1.

9. The booster pump according to claim 1, characterized in that: The second annular rib comprises a second inner ring sealing rib and a second outer ring sealing rib, and the second annular rib comprises a second inner ring sealing rib and a second outer ring sealing rib, both of which are arranged on a side of the piston valve seat facing the diaphragm.

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 one is provided with a limiting groove. When the piston push block is connected to the piston valve seat, the limiting column is limited in the limiting groove.

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