Pump head sealing structure and diaphragm pump

Abstract

The utility model discloses a pump head sealing structure and a diaphragm pump, and belongs to the technical field of water treatment. A first placing groove is formed in the mounting base; the diaphragm piece comprises a bottom and an abutting side wall arranged around the bottom, the bottom is placed at the bottom of the first containing groove, the bottom and the abutting side wall define a second containing groove, and the outer contour size of the abutting side wall in the horizontal direction is smaller than the inner contour size of the first containing groove in the horizontal direction. The extending height of the abutting side wall in the vertical direction is larger than the extending depth of the first containing groove in the vertical direction. The valve seat is placed in the second placing groove; the pump cover is arranged on the mounting base in a covering mode, and the pump cover can abut against the abutting side wall so as to seal a gap between the mounting base and the pump cover. According to the pump head sealing structure disclosed by the utility model, the sealing performance is improved, and the convenience of disassembly and assembly is ensured.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a pump head sealing structure and a diaphragm pump. Background Technology

[0002] In current designs of diaphragm pump head seals, the common practice is to install a sealing ring between the pump casing and the valve seat, or to use a soft rubber diaphragm as a substitute, achieving a sealing effect through appropriate compression. However, considering that diaphragm pumps often operate under high pressure (typically within the range of 0.6-0.8 MPa), relying solely on a single-layer seal structure poses certain safety risks. Minor issues may lead to pump head leakage and pump malfunction; serious problems could result in property damage or other safety issues for consumers due to leakage.

[0003] Patent CN118881537A discloses a diaphragm pump and water treatment equipment, which mentions that an interference fit is used between the annular side of the diaphragm and the mounting bracket to add a sealing structure, thereby improving the sealing performance. Specifically, the outer diameter of the annular side is slightly larger than the inner diameter of the mounting groove, and the inner diameter is slightly smaller than the outer diameter of the outer wall of the valve seat. This design can improve the sealing performance of the pump head while adding a sealing structure.

[0004] However, this patented technology also has some drawbacks. The annular side of the diaphragm needs to be inserted into the mounting groove of the mounting bracket. While the interference fit improves the sealing performance between the two, it also makes installation and disassembly difficult. This design may increase the complexity and cost of maintenance in practical applications. Therefore, while considering the improvement of sealing performance, the ease of installation and disassembly also needs to be weighed. Utility Model Content

[0005] The purpose of this invention is to provide a pump head sealing structure that cleverly balances sealing performance and ease of operation, making the pump head sealing more reliable in high-pressure working environments. At the same time, it greatly reduces the workload and time of disassembly and assembly during daily maintenance and replacement, thereby improving work efficiency.

[0006] In a first aspect, this utility model provides a pump head sealing structure, comprising:

[0007] The mounting base has a first placement slot;

[0008] A diaphragm sheet includes a bottom and an abutting sidewall disposed around the bottom. The bottom is placed on the bottom surface of a first placement groove, and the bottom and the abutting sidewall enclose a second placement groove. The outer contour dimension of the abutting sidewall in the horizontal direction is smaller than the inner contour dimension of the first placement groove in the horizontal direction, and the vertical extension height of the abutting sidewall is greater than the vertical extension depth of the first placement groove.

[0009] The valve seat is placed in the second placement slot;

[0010] A pump cover is disposed on the mounting base, and the pump cover is capable of abutting against the abutting side wall to seal the gap between the mounting base and the pump cover.

[0011] The pump head sealing structure provided by this utility model, through carefully designed dimensional matching, ensures convenient assembly and disassembly between the diaphragm and the mounting base: the horizontal outer contour dimension of the abutment sidewall is slightly smaller than the horizontal inner contour dimension of the first placement groove, allowing the diaphragm to be easily inserted and removed; simultaneously, the vertical extension height of the abutment sidewall is greater than the vertical extension depth of the first placement groove, so that when the pump cover covers the mounting base, the pump cover and the abutment sidewall fit tightly, ensuring a seal between the mounting base and the pump cover, thereby significantly improving the sealing performance of the pump head. This design cleverly achieves a balance between enhanced sealing performance and ease of assembly and disassembly, allowing the pump head to maintain efficient sealing while also facilitating daily maintenance and replacement.

[0012] Furthermore, it also includes a sealing ring, which is fitted onto the side of the valve seat away from the mounting base, and the pump cover can also abut against the sealing ring.

[0013] By adopting the above technical solution, a sealing ring is set between the pump cover and the valve seat, which can work together with the abutting side wall to form a double sealing structure. Even if one of the sealing structures fails, the other can still maintain the sealing function independently, which helps to enhance the sealing performance of the pump head.

[0014] Furthermore, the pump cover has a first rib on the side facing the sealing ring, the first rib being used to abut against the sealing ring; and / or, the valve seat has a second rib on the side facing the sealing ring, the second rib being used to abut against the sealing ring.

[0015] By adopting the above technical solution, by setting the first rib and the second rib, the first rib and the second rib can squeeze the sealing ring from opposite sides, thereby enhancing the sealing performance of the sealing ring.

[0016] Furthermore, the pump cover has a first step surface and a second step surface that are vertically offset on the side facing the mounting base. The first step surface is located inside the second step surface. The first step surface is used to abut against the sealing ring, and the second step surface is used to abut against the abutting side wall.

[0017] Furthermore, the horizontal outer contour dimension of the valve seat is smaller than the horizontal inner contour dimension of the second placement groove.

[0018] By adopting the above technical solution, the horizontal outer contour dimension of the valve seat is slightly smaller than the horizontal inner contour dimension of the second placement groove, which makes the valve seat easy to insert and remove, thereby ensuring the ease of disassembly and assembly between the valve seat and the diaphragm.

[0019] Furthermore, a third rib is provided on the side of the bottom facing the valve seat, and a sealing groove is provided on the side of the valve seat facing the bottom, with the third rib located within the sealing groove.

[0020] By adopting the above technical solution, the sealing performance between the valve seat and the diaphragm can be enhanced through the cooperation of the third rib and the sealing groove.

[0021] Furthermore, the vertical extension height of the third rib is greater than the vertical extension depth of the sealing groove.

[0022] With the above technical solution, the extension height of the third rib is greater than the extension depth of the sealing groove. When the valve seat is inserted into the diaphragm, the third rib will be squeezed and deformed by force, thereby further enhancing the sealing performance between the valve seat and the diaphragm.

[0023] Furthermore, it also includes a threaded connector, wherein the pump cover is provided with a first threaded hole, the mounting base is provided with a second threaded hole, and the threaded connector can be sequentially inserted into the first threaded hole and the second threaded hole.

[0024] Furthermore, the number of threaded connectors, the first threaded hole, and the second threaded hole is multiple and equal, each threaded connector passes through the corresponding first threaded hole and the corresponding second threaded hole, and the multiple threaded connectors are spaced apart along the circumference of the mounting base.

[0025] Secondly, the present invention provides a diaphragm pump, including any of the pump head sealing structures described above.

[0026] As can be seen from the above, the pump head sealing structure provided by this utility model, through carefully designed dimensional matching, ensures convenient assembly and disassembly between the diaphragm and the mounting base: the horizontal outer contour dimension of the abutting sidewall is slightly smaller than the horizontal inner contour dimension of the first placement groove, allowing the diaphragm to be easily inserted and removed; at the same time, the vertical extension height of the abutting sidewall is greater than the vertical extension depth of the first placement groove, so that when the pump cover covers the mounting base, the pump cover and the abutting sidewall fit tightly, ensuring a seal between the mounting base and the pump cover, thereby significantly improving the sealing performance of the pump head. This design cleverly achieves a balance between enhanced sealing performance and convenient assembly and disassembly, allowing the pump head to maintain efficient sealing while also facilitating daily maintenance and replacement.

[0027] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a pump head sealing structure proposed in this utility model.

[0029] Figure 2 for Figure 1 A cross-sectional schematic diagram of the sealing structure of the pump head.

[0030] Figure 3 for Figure 2 Enlarged schematic diagram of area A of the pump head sealing structure.

[0031] Figure 4 for Figure 1 An exploded view of the sealing structure of the pump head.

[0032] Figure 5 for Figure 4 A structural schematic diagram of the pump cover from another perspective.

[0033] In the attached diagram: 100, mounting base; 110, first placement groove; 120, second threaded hole; 200, diaphragm; 210, bottom; 211, third rib; 220, abutting side wall; 230, second placement groove; 300, valve seat; 310, second rib; 320, sealing groove; 400, pump cover; 410, first stepped surface; 411, first rib; 420, second stepped surface; 430, first threaded hole; 500, sealing ring; 600, threaded connector. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] The following disclosure provides many different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0036] The pump head sealing structure disclosed in this utility model is mainly used in diaphragm pumps. The pump head sealing structure can enhance the sealing of the pump head while also taking into account the ease of disassembly and assembly.

[0037] Reference Appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 In one embodiment, the pump head sealing structure includes a mounting base 100, a diaphragm 200, a valve seat 300, and a pump cover 400. The mounting base 100 is provided with a first placement groove 110; the diaphragm 200 includes a bottom 210 and an abutment sidewall 220 surrounding the bottom 210, the bottom 210 is placed on the bottom surface of the first placement groove 110, and the bottom 210 and the abutment sidewall 220 enclose a second placement groove 230, the outer contour dimension of the abutment sidewall 220 in the horizontal direction is smaller than the inner contour dimension of the first placement groove 110 in the horizontal direction, and the vertical extension height of the abutment sidewall 220 is greater than the vertical extension depth of the first placement groove 110; the valve seat 300 is placed in the second placement groove 230; the pump cover 400 is placed on the mounting base 100, and the pump cover 400 can abut against the abutment sidewall 220 to seal the gap between the mounting base 100 and the pump cover 400.

[0038] As can be seen from the above, the pump head sealing structure provided by this utility model, through carefully designed dimensional matching, ensures the ease of assembly and disassembly between the diaphragm 200 and the mounting base 100: the horizontal outer contour dimension of the abutting sidewall 220 is slightly smaller than the horizontal inner contour dimension of the first placement groove 110, allowing the diaphragm 200 to be easily inserted and removed; at the same time, the vertical extension height of the abutting sidewall 220 is greater than the vertical extension depth of the first placement groove 110, so that when the pump cover 400 covers the mounting base 100, the pump cover 400 and the abutting sidewall 220 fit tightly, ensuring the seal between the mounting base 100 and the pump cover 400, thereby significantly improving the sealing performance of the pump head. This design cleverly achieves a balance between enhanced sealing performance and ease of assembly and disassembly, making the pump head maintain efficient sealing while also facilitating daily maintenance and replacement.

[0039] Reference Appendix Figure 1 Appendix Figure 2 In one embodiment, a threaded connector 600 is also included. The pump cover 400 is provided with a first threaded hole 430, and the mounting base 100 is provided with a second threaded hole 120. The threaded connector 600 can be sequentially inserted into the first threaded hole 430 and the second threaded hole 120.

[0040] In one embodiment, the number of threaded connectors 600, first threaded holes 430 and second threaded holes 120 is multiple and equal, each threaded connector 600 passes through the corresponding first threaded hole 430 and the corresponding second threaded hole 120, and the multiple threaded connectors 600 are arranged at intervals along the circumference of the mounting base 100.

[0041] Reference Appendix Figure 3 , attached Figure 4 Appendix Figure 5 In one embodiment, a sealing ring 500 is also included, which is sleeved on the side of the valve seat 300 away from the mounting base 100, and the pump cover 400 can also abut against the sealing ring 500.

[0042] By adopting the above technical solution, a sealing ring 500 is set between the pump cover 400 and the valve seat 300, which can cooperate with the abutting side wall 220 to form a double sealing structure. Even if one of the sealing structures fails, the other can still maintain the sealing function independently, which helps to enhance the sealing performance of the pump head.

[0043] In one embodiment, the pump cover 400 is provided with a first rib 411 on the side facing the sealing ring 500, the first rib 411 being used to abut against the sealing ring 500; and / or, the valve seat 300 is provided with a second rib 310 on the side facing the sealing ring 500, the second rib 310 being used to abut against the sealing ring 500.

[0044] By adopting the above technical solution, by setting the first rib 411 and the second rib 310, the first rib 411 and the second rib 310 can respectively squeeze the sealing ring 500 from the opposite sides, thereby enhancing the sealing performance of the sealing ring 500.

[0045] In one embodiment, the pump cover 400 has a first step surface 410 and a second step surface 420 that are vertically offset on the side facing the mounting base 100. The first step surface 410 is located inside the second step surface 420. The first step surface 410 is used to abut against the sealing ring 500, and the second step surface 420 is used to abut against the abutting side wall 220.

[0046] In one embodiment, the horizontal outer contour dimension of the valve seat 300 is smaller than the horizontal inner contour dimension of the second placement groove 230.

[0047] By adopting the above technical solution, the horizontal outer contour dimension of the valve seat 300 is slightly smaller than the horizontal inner contour dimension of the second placement groove 230, which makes the valve seat 300 easy to insert and remove, thereby ensuring the ease of disassembly and assembly between the valve seat 300 and the diaphragm 200.

[0048] In one embodiment, a third rib 211 is provided on the side of the bottom 210 facing the valve seat 300, and a sealing groove 320 is provided on the side of the valve seat 300 facing the bottom 210, with the third rib 211 located in the sealing groove 320.

[0049] By adopting the above technical solution, the sealing performance between the valve seat 300 and the diaphragm 200 can be enhanced by the cooperation of the third rib 211 and the sealing groove 320.

[0050] In one embodiment, the vertical extension height of the third rib 211 is greater than the vertical extension depth of the sealing groove 320.

[0051] Using the above technical solution, the extension height of the third rib 211 is greater than the extension depth of the sealing groove 320. When the valve seat 300 is inserted into the diaphragm 200, the third rib 211 will be deformed by force, thereby further enhancing the sealing performance between the valve seat 300 and the diaphragm 200.

[0052] This utility model also provides a diaphragm pump, including the pump head sealing structure of any of the above embodiments.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A pump head sealing structure, characterized in that, include: The mounting base (100) is provided with a first placement slot (110); A diaphragm sheet (200) includes a bottom (210) and an abutting sidewall (220) disposed around the bottom (210). The bottom (210) is placed on the bottom surface of the first placement groove (110). The bottom (210) and the abutting sidewall (220) enclose a second placement groove (230). The outer contour dimension of the abutting sidewall (220) in the horizontal direction is smaller than the inner contour dimension of the first placement groove (110) in the horizontal direction. The vertical extension height of the abutting sidewall (220) is greater than the vertical extension depth of the first placement groove (110). The valve seat (300) is placed in the second placement slot (230); A pump cover (400) is disposed on the mounting base (100), and the pump cover (400) is capable of abutting against the abutting sidewall (220) to seal the gap between the mounting base (100) and the pump cover (400).

2. The pump head sealing structure according to claim 1, characterized in that, It also includes a sealing ring (500), which is fitted on the side of the valve seat (300) away from the mounting base (100), and the pump cover (400) can also abut against the sealing ring (500).

3. The pump head sealing structure according to claim 2, characterized in that, The pump cover (400) has a first rib (411) on the side facing the sealing ring (500), the first rib (411) being used to abut against the sealing ring (500); and / or, the valve seat (300) has a second rib (310) on the side facing the sealing ring (500), the second rib (310) being used to abut against the sealing ring (500).

4. The pump head sealing structure according to claim 2, characterized in that, The pump cover (400) has a first step surface (410) and a second step surface (420) that are vertically offset on the side facing the mounting base (100). The first step surface (410) is located inside the second step surface (420). The first step surface (410) is used to abut against the sealing ring (500), and the second step surface (420) is used to abut against the abutting side wall (220).

5. The pump head sealing structure according to claim 1, characterized in that, The horizontal outer contour dimension of the valve seat (300) is smaller than the horizontal inner contour dimension of the second placement groove (230).

6. A pump head sealing structure according to claim 5, characterized in that, The bottom (210) is provided with a third rib (211) on the side facing the valve seat (300), and the valve seat (300) is provided with a sealing groove (320) on the side facing the bottom (210), and the third rib (211) is provided in the sealing groove (320).

7. A pump head sealing structure according to claim 6, characterized in that, The vertical extension height of the third rib (211) is greater than the vertical extension depth of the sealing groove (320).

8. The pump head sealing structure according to claim 1, characterized in that, It also includes a threaded connector (600), the pump cover (400) is provided with a first threaded hole (430), the mounting base (100) is provided with a second threaded hole (120), and the threaded connector (600) can be sequentially inserted into the first threaded hole (430) and the second threaded hole (120).

9. A pump head sealing structure according to claim 8, characterized in that, The number of threaded connectors (600), the first threaded hole (430) and the second threaded hole (120) are multiple and equal. Each threaded connector (600) passes through the corresponding first threaded hole (430) and the corresponding second threaded hole (120), and the multiple threaded connectors (600) are arranged at circumferential intervals along the mounting base (100).

10. A diaphragm pump, characterized in that, Includes the pump head sealing structure as described in any one of claims 1-9.

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