Pump head structure and booster pump

Abstract

The invention relates to the technical field of water purification, in particular to a pump head structure and a booster pump. The pump head structure comprises a fluid chamber, a diaphragm and a support, the bottom of the fluid chamber is provided with a first crimping part, the crimping part is provided with a sealing groove, the top of the support is provided with a second crimping part, the second crimping part is provided with a mounting groove, the mounting groove is provided with a sealing washer, the upper end of the sealing washer protrudes out of the mounting groove, and the diaphragm is arranged in the mounting groove. The first crimping part is crimped with the second crimping part, so that the sealing washer is partially extruded into the sealing groove, and the diaphragm is clamped between the fluid chamber and the bracket and extrudes the sealing washer. The sealing gasket can be embedded into the sealing groove due to extrusion deformation, so that the sealing effect is better, the sealing gasket is also extruded by the diaphragm, the sealing effect is further improved, and the problem that the sealing effect of compression joint of a fluid chamber and a support in an existing booster pump is poor is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and in particular to a pump head structure and a booster pump. Background Art

[0002] The booster pump used in water purifiers generally has the fluid chamber cover installed on a bracket. Since the fluid chamber cover and the bracket need to be sealed, the fluid chamber and the bracket need to be pressed very tightly. However, after long-term use, the fit between the two will deteriorate, resulting in a poor sealing effect. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention proposes a pump head structure and a booster pump, aiming to solve the problem of poor sealing effect of the crimping between the fluid chamber and the bracket in the prior booster pump.

[0004] The technical solution proposed by the present invention is:

[0005] A pump head structure includes a fluid chamber, a diaphragm and a bracket, wherein a first crimping portion is provided at the bottom of the fluid chamber, the crimping portion is provided with a sealing groove, a second crimping portion is provided at the top of the bracket, the second crimping portion is provided with a mounting groove, the mounting groove is provided with a sealing gasket, the upper end of the sealing gasket protrudes from the mounting groove, the first crimping portion and the second crimping portion are crimped together so that the sealing gasket is partially squeezed into the sealing groove, and the diaphragm is clamped between the fluid chamber and the bracket and squeezes the sealing gasket.

[0006] Furthermore, the upper end of the sealing gasket has a free portion that is not abutted by the first crimping portion, and the diaphragm is provided with a sealing rib, which abuts against the free portion and squeezes the free portion to deform.

[0007] Furthermore, the sealing groove is arranged continuously around the inner space of the fluid chamber.

[0008] Further, the pump head structure includes a piston structure, which includes a piston, a sealing ring and a screw. The sealing ring includes a sealing ring body, the bottom wall of the sealing ring body protrudes downward to form a first sealing ring, the outer ring wall of the first sealing ring is a sloped wall, the piston is provided with a first sealing groove, the bottom groove of the first sealing groove is provided with a second sealing groove, the bottom wall of the second sealing groove is provided with a first through hole, the diaphragm is provided with a second through hole, the rod of the screw is passed through the inner ring wall of the sealing ring body and the first through hole, the sealing ring body is clamped between the piston and the head of the screw, the bottom wall of the sealing ring body abuts against the first sealing groove, and the outer ring wall of the first sealing ring abuts against the sloped wall of the second sealing groove.

[0009] Furthermore, the top wall of the sealing ring body protrudes upward to form a second sealing ring, and the second sealing ring is used to abut against the head of the screw.

[0010] Furthermore, the inner ring wall of the sealing ring body, the inner ring wall of the first sealing ring and the inner ring wall of the second sealing ring are concentric circles and have the same size.

[0011] Furthermore, the outer ring wall of the second sealing ring is a sloped wall.

[0012] Furthermore, the pump head structure includes a piston bracket, the piston bracket is provided with a threaded hole, and the shaft of the screw passes through the inner ring wall of the sealing ring body, the first through hole, the second through hole and is connected to the threaded hole.

[0013] Furthermore, the area of ​​the bottom wall of the second sealing groove is equal to the area of ​​the first through hole.

[0014] Furthermore, the diaphragm is provided with at least one positioning hole, and the piston is provided with at least one positioning post, and each of the positioning posts is inserted into one of the positioning holes to position the piston on the diaphragm.

[0015] Furthermore, the fluid chamber is provided with a groove, and the bottom wall of the groove is provided with a first pressure relief hole and a second pressure relief hole, the first pressure relief hole is used to communicate with the high-pressure chamber, and the second pressure relief hole is used to communicate with the water inlet pipe of the fluid chamber, and a pressure relief structure is provided in the groove, and the pressure relief structure seals the first pressure relief hole and the second pressure relief hole, and when the pressure in the high-pressure chamber is greater than the preset pressure, the pressure relief structure connects the first pressure relief hole with the second pressure relief hole.

[0016] Furthermore, the pressure relief structure includes a frame, a spring, a push block and a sealing sheet, one end of the spring is connected to the inner wall of the frame, and the other end is connected to one end of the push block, the push block can move up and down in the frame, the sealing sheet is placed on the bottom wall of the groove and covers the first pressure relief hole and the second pressure relief hole, and the other end of the push block abuts against the sealing sheet.

[0017] Furthermore, the frame opening of the frame body is crimped to the sealing sheet.

[0018] Furthermore, an upper sealing rib is provided on the upper side wall of the sealing sheet, and a lower sealing rib is provided on the lower side wall of the sealing sheet. The upper sealing rib is pressed against the frame opening of the frame body, and the lower sealing rib is pressed against the bottom wall of the groove.

[0019] The present invention also provides a booster pump, characterized in that it includes a pump head structure, the pump head structure includes a fluid chamber, a diaphragm and a bracket, the bottom of the fluid chamber is provided with a first crimping portion, the crimping portion is provided with a sealing groove, the top of the bracket is provided with a second crimping portion, the second crimping portion is provided with a mounting groove, the mounting groove is provided with a sealing gasket, the upper end of the sealing gasket protrudes from the mounting groove, the first crimping portion and the second crimping portion are crimped together so that the sealing gasket is partially squeezed into the sealing groove, the diaphragm is clamped between the fluid chamber and the bracket, and squeezes the sealing gasket.

[0020] According to the above technical scheme, the beneficial effects of the present invention are as follows: the fluid chamber and the bracket are connected by crimping the first crimping part and the second crimping part, and a sealing gasket is arranged on the second crimping part, so that the sealing gasket will be squeezed by the first crimping part, and the first crimping part is provided with a sealing groove, and the sealing gasket will be embedded in the sealing groove due to the extrusion deformation, so that the sealing effect is better, and the diaphragm also squeezes the sealing gasket, further improving the sealing effect, and solving the problem of poor sealing effect of crimping between the fluid chamber and the bracket in the existing booster pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of a pump head structure provided by an embodiment of the present invention;

[0022] Figure 2 Yes Yes Figure 1 Enlarged view of point A in the middle.

[0023] Figure 3 is a schematic diagram of the structure of a sealing ring provided by an embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of the structure of the sealing ring provided by the embodiment of the present invention in another direction;

[0025] Figure 5 is a structural schematic diagram of a pump head structure provided by an embodiment of the present invention;

[0026] Figure 6 yes Figure 5 The enlarged view of point B in the middle;

[0027] Figure 7 is a schematic diagram of the structure of a piston provided by an embodiment of the present invention;

[0028] Figure 8 is a schematic diagram of the structure of a diaphragm provided by an embodiment of the present invention;

[0029] Fig. 9 is a schematic structural diagram of the pump head structure provided by an embodiment of the present invention in another direction;

[0030] Fig.10It is a schematic diagram of the structure of the fluid chamber provided by the embodiment of the present invention.

[0031] Among them, the fluid chamber 11, the first crimping portion 111, the sealing groove 1111, the first pressure relief hole 171, the second pressure relief hole 172, the frame 181, the spring 182, the push block 183, and the sealing sheet 184;

[0032] Bracket 12, second crimping portion 121, mounting groove 1211, sealing gasket 1212, free portion 12121;

[0033] Pump head structure 1, sealing rib 131;

[0034] Sealing ring 21 , sealing ring body 211 , first sealing ring 212 , second sealing ring 213 , piston structure 22 , piston 221 , first sealing groove 2211 , second sealing groove 2212 , first through hole 2213 , screw 222 , diaphragm 13 , piston bracket 14 . DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Embodiment 1

[0037] like Figure 1 and Figure 2 As shown, an embodiment of the present invention further proposes a pump head structure 1, including a fluid chamber 11, a diaphragm 13 and a bracket 12, wherein a first crimping portion 111 is provided at the bottom of the fluid chamber 11, and the crimping portion is provided with a sealing groove 1111, and a second crimping portion 121 is provided at the top of the bracket 12, and the second crimping portion 121 is provided with a mounting groove 1211, and the mounting groove 1211 is provided with a sealing gasket 1212, and the upper end of the sealing gasket 1212 protrudes from the mounting groove 1211, and the first crimping portion 111 and the second crimping portion 121 are crimped together so that the sealing gasket 1212 is partially squeezed into the sealing groove 1111, and the diaphragm 13 is clamped between the fluid chamber 11 and the bracket 12, and squeezes the sealing gasket 1212.

[0038] The fluid chamber 11 and the bracket 12 are connected by crimping the first crimping portion 111 and the second crimping portion 121, and a sealing gasket 1212 is provided on the second crimping portion 121, so that the sealing gasket 1212 will be squeezed by the first crimping portion 111, and the first crimping portion 111 is provided with a sealing groove 1111, and the sealing gasket 1212 will be embedded in the sealing groove 1111 due to the extrusion deformation, so that the sealing effect is better, and the diaphragm 13 also squeezes the sealing gasket 1212, further improving the sealing effect, and solving the problem of poor sealing effect of crimping between the fluid chamber and the bracket in the existing booster pump.

[0039] In this embodiment, the newly added sealing groove 1111 is not used to install and fix the sealing gasket 1212, but is used to deform the sealing gasket 1212 during crimping so that it can be squeezed into the sealing groove 1111.

[0040] Specifically, the shape of the sealing groove 1111 is not limited, and can be a rectangle, an arc or an irregular shape. In this embodiment, in order to facilitate processing and reduce costs, the shape of the sealing groove 1111 is a rectangle.

[0041] In this embodiment, the sealing groove 1111 includes a first side wall, a second side wall and a bottom wall, and two sides of the bottom wall are respectively connected to the first side wall and the second side wall, thereby forming the sealing groove 1111 .

[0042] In this embodiment, the width of the sealing groove 1111 is smaller than the width of the sealing gasket 1212, so that the sealing gasket 1212 will fill the sealing groove 1111 in the width direction to improve the sealing performance.

[0043] Specifically, the sealing gasket 1212 abuts against the first crimping portion 111 , is squeezed into the sealing groove 1111 , and abuts against the first side wall, the second side wall and the bottom wall respectively.

[0044] In some embodiments, the sealing gasket 1212 abuts against the first crimping portion 111 and squeezes into the sealing groove 1111. The portion squeezed into the sealing groove 1111 abuts against the first side wall and the second side wall respectively, and has no contact with the bottom wall. This can also achieve a good sealing effect. Of course, according to the irregular distribution of the upper portion of the sealing gasket 1212, the portion squeezed into the sealing groove 1111 only abuts against the first side wall or the second side wall, which can also achieve a sealing effect.

[0045] In this embodiment, the sealing groove 1111 is arranged continuously around the internal space of the fluid chamber 11. The sealing groove 1111 is arranged in a circular manner, and the head and tail ends of the sealing groove 1111 are connected, so that the part of the sealing gasket 1212 squeezed into the sealing groove 1111 is also uninterrupted, and the sealing effect is better.

[0046] A mounting groove 1211 is provided on the second crimping portion 121, and a part of the mounting groove 1211 corresponds to the first crimping portion 111 up and down. The sealing gasket 1212 is installed in the mounting groove 1211. When the first crimping portion 111 and the second crimping portion 121 are crimped, the sealing gasket 1212 protrudes and is partially squeezed by the first crimping portion 111. Specifically, the sealing gasket 1212 is divided into an outer ring portion and an inner ring portion. The outer ring portion is squeezed by the first crimping portion 111 and will be squeezed into the sealing groove 1111.

[0047] In this embodiment, the upper end of the sealing gasket 1212 has a free portion 12121 that is not abutted by the first crimping portion 111. According to the above division of the sealing gasket 1212, the inner ring portion is the free portion 12121.

[0048] In this embodiment, the pump head structure 1 includes a diaphragm 13 disposed in the fluid chamber 11, and the diaphragm 13 is provided with a sealing rib 131, and the sealing rib 131 abuts against the free portion 12121 and squeezes the free portion 12121 to deform. The sealing rib 131 squeezes the free portion 12121, and the free portion 12121 is deformed so that the sealing rib 131 sinks into the free portion 12121.

[0049] Specifically, the sealing rib 131 includes a first sealing side wall, a second sealing side wall and a sealing top wall, and the free portion 12121 wraps the sealing rib 131, that is, the free portion 12121 abuts against the first sealing side wall, the second sealing side wall and the sealing top wall respectively. This has a better sealing effect.

[0050] like Figures 3 to 8 As shown, the pump head structure includes a piston structure 22, including a piston 221, a sealing ring 21 and a screw 222, the sealing ring includes a sealing ring body 211, the bottom wall of the sealing ring body 211 protrudes downward to form a first sealing ring 212, the outer ring wall of the first sealing ring 212 is a sloped wall, the piston 221 is provided with a first sealing groove 2211, the groove bottom groove of the first sealing groove 2211 is provided with a second sealing groove 2212, the groove bottom wall of the second sealing groove 2212 is provided with a first through hole 2213, the rod of the screw 222 is penetrated by the inner ring wall of the sealing ring body 211 and the first through hole 2213, the sealing ring body 211 is clamped between the piston 221 and the head of the screw 222, the bottom wall of the sealing ring body 211 abuts against the first sealing groove 2211, and the outer ring wall of the first sealing ring 212 is used to abut against the sloped wall of the second sealing groove 2212.

[0051] In this embodiment, the piston structure 22 is applied in a booster pump.

[0052] The sealing ring body 211 is clamped between the piston and the head of the screw 222. The outer ring wall of the first sealing ring 212 is a sloped wall. Under the locking force of the screw 222, the first sealing ring 212 is completely filled in the gap between the piston 221 and the screw 222 along the sloped wall of the second sealing groove 2212 to play a sealing role, thereby solving the problem that the sealing ring between the screw and the piston in the existing booster pump is prone to failure.

[0053] In this embodiment, the diaphragm 13 is provided with at least one positioning hole, and the piston 221 is provided with at least one positioning column, and each positioning column is inserted into a positioning hole, so that the positioning and installation of the piston 221 and the diaphragm 13 are convenient and the installation effect is improved.

[0054] Specifically, the positioning hole is a circular hole, and the positioning column is a cylinder.

[0055] Specifically, the number of the positioning holes is two, and correspondingly, the number of the positioning posts is also two. The two positioning holes can both achieve positioning and prevent the piston 221 from rotating relative to the diaphragm 13, thereby achieving radial positioning.

[0056] Specifically, the two positioning holes are arranged alternately.

[0057] In this embodiment, the top wall of the sealing ring body 211 protrudes upward to form a second sealing ring 213, and the second sealing ring 213 abuts against the head of the screw 222. Depending on the degree of locking of the screw 222 and the piston 221, the degree of compression of the second sealing ring 213 is different, and only the second sealing ring 213 abuts against the head of the screw 222, or the sealing ring body 211 and the first sealing ring 212 abut against the head of the screw 222.

[0058] In this embodiment, the inner ring wall of the sealing ring body 211, the inner ring wall of the first sealing ring 212 and the inner ring wall of the second sealing ring 213 are concentric circles and have the same size. In other words, the inner ring walls of the sealing ring body 211, the first sealing ring 212 and the second sealing ring 213 have the same size and are compatible with the size of the shaft of the screw 222.

[0059] In this embodiment, the outer wall of the second sealing ring 213 is a sloped wall. The first sealing ring 212 and the second sealing ring 213 have the same structure, so when installing, there is no need to distinguish the upper and lower positions of the sealing ring 21.

[0060] The pump head structure includes a piston bracket 14, and the piston bracket 14 is provided with a threaded hole. The shaft of the screw 222 passes through the inner ring wall of the sealing ring body 211, the first through hole 2213, and the second through hole to be connected with the threaded hole.

[0061] In this embodiment, the area of ​​the bottom wall of the second sealing groove 2212 is equal to the area of ​​the first through hole 2213. In other words, the bottom wall of the second sealing groove 2212 is completely hollowed out to form the first through hole 2213.

[0062] like Fig. 9 and Fig.10 As shown, the fluid chamber 11 is provided with a groove, and the bottom wall of the groove is provided with a first pressure relief hole 171 and a second pressure relief hole 172, the first pressure relief hole 171 is used to communicate with the high-pressure chamber, and the second pressure relief hole 172 is used to communicate with the water inlet pipe of the fluid chamber 11, and a pressure relief structure is provided in the groove, and the pressure relief structure seals the first pressure relief hole 171 and the second pressure relief hole 172, and when the pressure in the high-pressure chamber is greater than the preset pressure, the pressure relief structure enables the first pressure relief hole 171 to communicate with the second pressure relief hole 172.

[0063] When the pressure in the high-pressure chamber is too high, the pressure is released to the water inlet pipe through the first pressure relief hole 171 and the second pressure relief hole 172, thereby solving the problem of damage to the booster pump caused by excessive pressure in the high-pressure chamber of the existing booster pump.

[0064] In this embodiment, the pressure relief structure includes a frame 181, a spring 182, a push block 183 and a sealing sheet 184. One end of the spring 182 is connected to the inner wall of the frame 181, and the other end is connected to one end of the push block 183. The push block 183 can move up and down in the frame 181. The sealing sheet 184 is placed on the bottom wall of the groove and covers the first pressure relief hole 171 and the second pressure relief hole 172. The other end of the push block 183 abuts against the sealing sheet 184. When the pressure in the high-pressure chamber is too high, the push block 183 is pushed upward, so that there is a gap between the sealing sheet 184 and the bottom wall of the groove, thereby connecting the first pressure relief hole 171 and the second pressure relief hole 172.

[0065] In this embodiment, the frame opening of the frame body 181 is pressed against the sealing sheet 184. When the pressure in the high pressure chamber is too high, the sealing sheet 184 bulges as the push block 183 moves upward, thereby connecting the first pressure relief hole 171 and the second pressure relief hole 172.

[0066] Specifically, when the pressure in the high-pressure chamber is too high, since the outer area of ​​the sealing sheet 184 is pressed by the frame opening of the frame body 181, the inner area of ​​the sealing sheet 184, that is, the area corresponding to the push block 183, will be squeezed and bulged due to the pressure in the high-pressure chamber, thereby pushing the push block 183 to compress the spring 182, and a connecting channel connecting the first pressure relief hole 171 and the second pressure relief hole 172 is formed due to the bulge, thereby connecting the first pressure relief hole 171 and the second pressure relief hole 172. When the pressure in the high-pressure chamber returns to normal, the elastic force of the spring 182 will push the push block 183 to move downward, thereby allowing the sealing sheet 184 to seal the first pressure relief hole 171 and the second pressure relief hole 172 again.

[0067] In this embodiment, an upper sealing rib is provided on the upper side wall of the sealing sheet 184, and a lower sealing rib is provided on the lower side wall of the sealing sheet 184. The upper sealing rib is pressed against the frame opening of the frame body 181, and the lower sealing rib is pressed against the groove bottom wall of the groove. In order to further improve the sealing effect, an upper sealing rib is provided on the upper side wall of the sealing sheet 184, and a lower sealing rib is provided on the lower side wall of the sealing sheet 184. Specifically, the upper sealing rib and the lower sealing rib have the same structure, and a symmetrical error-proofing design is adopted, which can improve the installation efficiency.

[0068] Embodiment 2

[0069] like Figures 1 to 8 As shown, an embodiment of the present invention further provides a booster pump, including a pump seat and a pump head structure, wherein the pump head structure is connected to the pump seat.

[0070] In this embodiment, the booster pump is used in a water purifier.

[0071] A pump head structure 1 includes a fluid chamber 11, a diaphragm 13 and a bracket 12, wherein a first crimping portion 111 is provided at the bottom of the fluid chamber 11, and a sealing groove 1111 is provided at the crimping portion; a second crimping portion 121 is provided at the top of the bracket 12, and the second crimping portion 121 is provided with a mounting groove 1211, and a sealing gasket 1212 is provided at the mounting groove 1211, and the upper end of the sealing gasket 1212 protrudes from the mounting groove 1211; the first crimping portion 111 and the second crimping portion 121 are crimped together so that the sealing gasket 1212 is partially squeezed into the sealing groove 1111; the diaphragm 13 is clamped between the fluid chamber 11 and the bracket 12, and squeezes the sealing gasket 1212.

[0072] The fluid chamber 11 and the bracket 12 are connected by crimping the first crimping portion 111 and the second crimping portion 121, and a sealing gasket 1212 is provided on the second crimping portion 121, so that the sealing gasket 1212 will be squeezed by the first crimping portion 111, and the first crimping portion 111 is provided with a sealing groove 1111, and the sealing gasket 1212 will be embedded in the sealing groove 1111 due to the extrusion deformation, so that the sealing effect is better, and the diaphragm 13 also squeezes the sealing gasket 1212, further improving the sealing effect, and solving the problem of poor sealing effect of crimping between the fluid chamber and the bracket in the existing booster pump.

[0073] In this embodiment, the newly added sealing groove 1111 is not used to install and fix the sealing gasket 1212, but is used to deform the sealing gasket 1212 during crimping so that it can be squeezed into the sealing groove 1111.

[0074] Specifically, the shape of the sealing groove 1111 is not limited, and can be a rectangle, an arc or an irregular shape. In this embodiment, in order to facilitate processing and reduce costs, the shape of the sealing groove 1111 is a rectangle.

[0075] In this embodiment, the sealing groove 1111 includes a first side wall, a second side wall and a bottom wall, and two sides of the bottom wall are respectively connected to the first side wall and the second side wall, thereby forming the sealing groove 1111 .

[0076] In this embodiment, the width of the sealing groove 1111 is smaller than the width of the sealing gasket 1212, so that the sealing gasket 1212 will fill the sealing groove 1111 in the width direction to improve the sealing performance.

[0077] Specifically, the sealing gasket 1212 abuts against the first crimping portion 111 , is squeezed into the sealing groove 1111 , and abuts against the first side wall, the second side wall and the bottom wall respectively.

[0078] In some embodiments, the sealing gasket 1212 abuts against the first crimping portion 111 and squeezes into the sealing groove 1111. The portion squeezed into the sealing groove 1111 abuts against the first side wall and the second side wall respectively, and has no contact with the bottom wall. This can also achieve a good sealing effect. Of course, according to the irregular distribution of the upper portion of the sealing gasket 1212, the portion squeezed into the sealing groove 1111 only abuts against the first side wall or the second side wall, which can also achieve a sealing effect.

[0079] In this embodiment, the sealing groove 1111 is arranged continuously around the internal space of the fluid chamber 11. The sealing groove 1111 is arranged in a circular manner, and the head and tail ends of the sealing groove 1111 are connected, so that the part of the sealing gasket 1212 squeezed into the sealing groove 1111 is also uninterrupted, and the sealing effect is better.

[0080] A mounting groove 1211 is provided on the second crimping portion 121, and a part of the mounting groove 1211 corresponds to the first crimping portion 111 up and down. The sealing gasket 1212 is installed in the mounting groove 1211. When the first crimping portion 111 and the second crimping portion 121 are crimped, the sealing gasket 1212 protrudes and is partially squeezed by the first crimping portion 111. Specifically, the sealing gasket 1212 is divided into an outer ring portion and an inner ring portion. The outer ring portion is squeezed by the first crimping portion 111 and will be squeezed into the sealing groove 1111.

[0081] In this embodiment, the upper end of the sealing gasket 1212 has a free portion 12121 that is not abutted by the first crimping portion 111. According to the above division of the sealing gasket 1212, the inner ring portion is the free portion 12121.

[0082] In this embodiment, the pump head structure 1 includes a diaphragm 13 disposed in the fluid chamber 11, and the diaphragm 13 is provided with a sealing rib 131, and the sealing rib 131 abuts against the free portion 12121 and squeezes the free portion 12121 to deform. The sealing rib 131 squeezes the free portion 12121, and the free portion 12121 is deformed so that the sealing rib 131 sinks into the free portion 12121.

[0083] Specifically, the sealing rib 131 includes a first sealing side wall, a second sealing side wall and a sealing top wall, and the free portion 12121 wraps the sealing rib 131, that is, the free portion 12121 abuts against the first sealing side wall, the second sealing side wall and the sealing top wall respectively. This has a better sealing effect.

[0084] like Figures 1 to 5 As shown, the pump head structure includes a piston structure 22, including a piston 221, a sealing ring 21 and a screw 222, the sealing ring includes a sealing ring body 211, the bottom wall of the sealing ring body 211 protrudes downward to form a first sealing ring 212, the outer ring wall of the first sealing ring 212 is a sloped wall, the piston 221 is provided with a first sealing groove 2211, the groove bottom groove of the first sealing groove 2211 is provided with a second sealing groove 2212, the groove bottom wall of the second sealing groove 2212 is provided with a first through hole 2213, the rod of the screw 222 is penetrated by the inner ring wall of the sealing ring body 211 and the first through hole 2213, the sealing ring body 211 is clamped between the piston 221 and the head of the screw 222, the bottom wall of the sealing ring body 211 abuts against the first sealing groove 2211, and the outer ring wall of the first sealing ring 212 is used to abut against the sloped wall of the second sealing groove 2212.

[0085] In this embodiment, the piston structure 22 is applied in a booster pump.

[0086] The sealing ring body 211 is clamped between the piston and the head of the screw 222. The outer ring wall of the first sealing ring 212 is a sloped wall. Under the locking force of the screw 222, the first sealing ring 212 is completely filled in the gap between the piston 221 and the screw 222 along the sloped wall of the second sealing groove 2212 to play a sealing role, thereby solving the problem that the sealing ring between the screw and the piston in the existing booster pump is prone to failure.

[0087] In this embodiment, the diaphragm 13 is provided with at least two positioning holes, and the piston 221 is provided with at least two positioning posts, each of which is inserted into a positioning hole, so as to facilitate the positioning and installation of the piston 221 and the diaphragm 13 and improve the installation effect.

[0088] Specifically, the positioning hole is a circular hole, and the positioning column is a cylinder.

[0089] Specifically, the number of the positioning holes is two, and correspondingly, the number of the positioning posts is also two. The two positioning holes can both achieve positioning and prevent the piston 221 from rotating relative to the diaphragm 13, thereby achieving radial positioning.

[0090] Specifically, the two positioning holes are arranged alternately.

[0091] In this embodiment, the top wall of the sealing ring body 211 protrudes upward to form a second sealing ring 213, and the second sealing ring 213 abuts against the head of the screw 222. Depending on the degree of locking of the screw 222 and the piston 221, the degree of compression of the second sealing ring 213 is different, and only the second sealing ring 213 abuts against the head of the screw 222, or the sealing ring body 211 and the first sealing ring 212 abut against the head of the screw 222.

[0092] In this embodiment, the inner ring wall of the sealing ring body 211, the inner ring wall of the first sealing ring 212 and the inner ring wall of the second sealing ring 213 are concentric circles and have the same size. In other words, the inner ring walls of the sealing ring body 211, the first sealing ring 212 and the second sealing ring 213 have the same size and are compatible with the size of the shaft of the screw 222.

[0093] In this embodiment, the outer wall of the second sealing ring 213 is a sloped wall. The first sealing ring 212 and the second sealing ring 213 have the same structure, so when installing, there is no need to distinguish the upper and lower positions of the sealing ring 21.

[0094] The pump head structure includes a piston bracket 14, and the piston bracket 14 is provided with a threaded hole. The shaft of the screw 222 passes through the inner ring wall of the sealing ring body 211, the first through hole 2213, and the second through hole to be connected with the threaded hole.

[0095] In this embodiment, the area of ​​the bottom wall of the second sealing groove 2212 is equal to the area of ​​the first through hole 2213. In other words, the bottom wall of the second sealing groove 2212 is completely hollowed out to form the first through hole 2213.

[0096] like Fig. 9 and Fig.10 As shown, the fluid chamber 11 is provided with a groove, and the bottom wall of the groove is provided with a first pressure relief hole 171 and a second pressure relief hole 172, the first pressure relief hole 171 is used to communicate with the high-pressure chamber, and the second pressure relief hole 172 is used to communicate with the water inlet pipe of the fluid chamber 11, and a pressure relief structure is provided in the groove, and the pressure relief structure seals the first pressure relief hole 171 and the second pressure relief hole 172, and when the pressure in the high-pressure chamber is greater than the preset pressure, the pressure relief structure enables the first pressure relief hole 171 to communicate with the second pressure relief hole 172.

[0097] When the pressure in the high-pressure chamber is too high, the pressure is released to the water inlet pipe through the first pressure relief hole 171 and the second pressure relief hole 172, thereby solving the problem of damage to the booster pump caused by excessive pressure in the high-pressure chamber of the existing booster pump.

[0098] In this embodiment, the pressure relief structure includes a frame 181, a spring 182, a push block 183 and a sealing sheet 184. One end of the spring 182 is connected to the inner wall of the frame 181, and the other end is connected to one end of the push block 183. The push block 183 can move up and down in the frame 181. The sealing sheet 184 is placed on the bottom wall of the groove and covers the first pressure relief hole 171 and the second pressure relief hole 172. The other end of the push block 183 abuts against the sealing sheet 184. When the pressure in the high-pressure chamber is too high, the push block 183 is pushed upward, so that there is a gap between the sealing sheet 184 and the bottom wall of the groove, thereby connecting the first pressure relief hole 171 and the second pressure relief hole 172.

[0099] In this embodiment, the frame opening of the frame body 181 is pressed against the sealing sheet 184. When the pressure in the high pressure chamber is too high, the sealing sheet 184 bulges as the push block 183 moves upward, thereby connecting the first pressure relief hole 171 and the second pressure relief hole 172.

[0100] Specifically, when the pressure in the high-pressure chamber is too high, since the outer area of ​​the sealing sheet 184 is pressed by the frame opening of the frame body 181, the inner area of ​​the sealing sheet 184, that is, the area corresponding to the push block 183, will be squeezed and bulged due to the pressure in the high-pressure chamber, thereby pushing the push block 183 to compress the spring 182, and a connecting channel connecting the first pressure relief hole 171 and the second pressure relief hole 172 is formed due to the bulge, thereby connecting the first pressure relief hole 171 and the second pressure relief hole 172. When the pressure in the high-pressure chamber returns to normal, the elastic force of the spring 182 will push the push block 183 to move downward, thereby allowing the sealing sheet 184 to seal the first pressure relief hole 171 and the second pressure relief hole 172 again.

[0101] In this embodiment, an upper sealing rib is provided on the upper side wall of the sealing sheet 184, and a lower sealing rib is provided on the lower side wall of the sealing sheet 184. The upper sealing rib is pressed against the frame opening of the frame body 181, and the lower sealing rib is pressed against the groove bottom wall of the groove. In order to further improve the sealing effect, an upper sealing rib is provided on the upper side wall of the sealing sheet 184, and a lower sealing rib is provided on the lower side wall of the sealing sheet 184. Specifically, the upper sealing rib and the lower sealing rib have the same structure, and a symmetrical error-proofing design is adopted, which can improve the installation efficiency.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pump head structure, characterized in that: It includes a fluid chamber, a diaphragm and a bracket, wherein a first crimping portion is provided at the bottom of the fluid chamber, and a sealing groove is provided at the crimping portion; a second crimping portion is provided at the top of the bracket, and a mounting groove is provided at the second crimping portion, and a sealing gasket is provided at the mounting groove; the upper end of the sealing gasket protrudes from the mounting groove; the first crimping portion and the second crimping portion are crimped to each other so that the sealing gasket is partially squeezed into the sealing groove; the diaphragm is clamped between the fluid chamber and the bracket and squeezes the sealing gasket.

2. The pump head structure according to claim 1, characterized in that: The upper end of the sealing gasket has a free portion which is not abutted by the first crimping portion, and the diaphragm is provided with a sealing rib which abuts against the free portion and squeezes the free portion to deform.

3. The pump head structure according to claim 1, characterized in that: The sealing groove is arranged continuously around the inner space of the fluid chamber.

4. The pump head structure according to claim 1, characterized in that: The pump head structure includes a piston structure, which includes a piston, a sealing ring and a screw. The sealing ring includes a sealing ring body, the bottom wall of the sealing ring body protrudes downward to form a first sealing ring, the outer ring wall of the first sealing ring is a sloped wall, the piston is provided with a first sealing groove, the bottom groove of the first sealing groove is provided with a second sealing groove, the bottom wall of the second sealing groove is provided with a first through hole, the diaphragm is provided with a second through hole, the rod of the screw is passed through the inner ring wall of the sealing ring body and the first through hole, the sealing ring body is clamped between the piston and the head of the screw, the bottom wall of the sealing ring body abuts against the first sealing groove, and the outer ring wall of the first sealing ring abuts against the sloped wall of the second sealing groove.

5. The pump head structure according to claim 4, characterized in that: The top wall of the sealing ring body protrudes upward to form a second sealing ring, and the second sealing ring is used to abut against the head of the screw.

6. The pump head structure according to claim 5, characterized in that: The inner ring wall of the sealing ring body, the inner ring wall of the first sealing ring and the inner ring wall of the second sealing ring are concentric circles and have the same size.

7. The pump head structure according to claim 5, characterized in that: The outer ring wall of the second sealing ring is a sloped wall.

8. The pump head structure according to claim 4, characterized in that: The pump head structure comprises a piston bracket, the piston bracket is provided with a threaded hole, and the shaft of the screw passes through the inner ring wall of the sealing ring body, the first through hole, the second through hole and is connected with the threaded hole.

9. The pump head structure according to claim 4, characterized in that: The area of ​​the bottom wall of the second sealing groove is equal to the area of ​​the first through hole.

10. The pump head structure according to claim 1, characterized in that: The fluid chamber is provided with a groove, and the bottom wall of the groove is provided with a first pressure relief hole and a second pressure relief hole, the first pressure relief hole is used to communicate with the high-pressure chamber, and the second pressure relief hole is used to communicate with the water inlet pipe of the fluid chamber, and a pressure relief structure is provided in the groove, and the pressure relief structure seals the first pressure relief hole and the second pressure relief hole, and when the pressure in the high-pressure chamber is greater than the preset pressure, the pressure relief structure connects the first pressure relief hole with the second pressure relief hole.

11. The fluid chamber according to claim 10, characterized in that The pressure relief structure includes a frame, a spring, a push block and a sealing sheet. One end of the spring is connected to the inner wall of the frame, and the other end is connected to one end of the push block. The push block can move up and down in the frame. The sealing sheet is placed on the bottom wall of the groove and covers the first pressure relief hole and the second pressure relief hole. The other end of the push block abuts against the sealing sheet.

12. The fluid chamber according to claim 11, characterized in that The frame opening of the frame body is crimped to the sealing sheet.

13. The fluid chamber according to claim 12, characterized in that An upper sealing rib is provided on the upper side wall of the sealing sheet, and a lower sealing rib is provided on the lower side wall of the sealing sheet. The upper sealing rib is pressed against the frame opening of the frame body, and the lower sealing rib is pressed against the groove bottom wall of the groove.

14. A booster pump, characterized in that: It comprises the pump head structure as described in claims 1-13.

Images