Diaphragm pump

Abstract

The utility model discloses a diaphragm pump, which comprises a valve plate; an upper cover; the sealing gasket is arranged between the valve plate and the upper cover; a first sealing assembly is arranged between the sealing gasket and the valve plate, a second sealing assembly is arranged between the sealing gasket and the upper cover, the first sealing assembly comprises a first sealing structure and a second sealing structure, the first sealing structure and the second sealing structure are arranged on the end face of the valve plate and the end face of the sealing gasket respectively, and the first sealing structure and the second sealing structure are connected in a sealed mode. The second sealing assembly comprises a third sealing structure and a fourth sealing structure, the third sealing structure and the fourth sealing structure are arranged on the end face of the upper cover and the end face of the sealing gasket respectively, and the third sealing structure and the fourth sealing structure are connected in a sealed mode. The first sealing assembly can improve the sealing performance between the valve plate and the sealing gasket, and the second sealing assembly can improve the sealing performance between the upper cover and the sealing gasket, so that the sealing performance among the sealing gasket, the upper cover and the valve plate can be improved, and the overall sealing performance of the diaphragm pump is improved.

Description

Technical Field

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

[0002] Diaphragm pumps basically use an eccentric wheel mechanism. In the traditional eccentric wheel structure, when in use, the motor output shaft is directly inserted into the motor shaft hole of the eccentric wheel to achieve a connection without relative rotation. The eccentric shaft is inserted into the eccentric inclined hole of the eccentric wheel for a movable connection. The motor drives the eccentric wheel to rotate, and the inclined hole of the eccentric wheel drives the eccentric shaft to achieve eccentric rotation, thereby realizing the swing of the piston crankshaft, which is equivalent to realizing the reciprocating motion of the piston.

[0003] The eccentric wheel diaphragm pump includes a valve plate, an upper cover, a leather cup, a cylinder body and other components, which together constitute a pump chamber. A sealing gasket is provided between the valve plate and the upper cover of the diaphragm pump. The existing sealing gasket is generally a sheet structure with flat surfaces at both ends, and the sealing performance is poor. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to provide a diaphragm pump to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.

[0005] The solution of the utility model to solve the technical problem is:

[0006] Diaphragm pump, including:

[0007] Valve plate;

[0008] Upper cover;

[0009] A sealing gasket, wherein the sealing gasket is arranged between the valve plate and the upper cover; a first sealing component is arranged between the sealing gasket and the valve plate, and a second sealing component is arranged between the sealing gasket and the upper cover, the first sealing component includes a first sealing structure and a second sealing structure, the first sealing structure and the second sealing structure are respectively arranged on the end faces of the valve plate and the sealing gasket, and the first sealing structure and the second sealing structure are sealed and connected; the second sealing component includes a third sealing structure and a fourth sealing structure, the third sealing structure and the fourth sealing structure are respectively arranged on the end faces of the upper cover and the sealing gasket, and the third sealing structure and the fourth sealing structure are sealed and connected.

[0010] Through the above technical scheme, the first sealing component can improve the sealing performance between the valve plate and the sealing gasket, and the second sealing component can improve the sealing performance between the upper cover and the sealing gasket, thereby improving the sealing performance between the sealing gasket, the upper cover and the valve plate, and further improving the overall sealing performance of the diaphragm pump.

[0011] As a further improvement of the above technical solution, the first sealing structure is an annular groove structure, and the second sealing structure is an annular protrusion structure.

[0012] As a further improvement of the above technical solution, the fourth sealing structure is an annular groove structure, and the third sealing structure is an annular protrusion structure.

[0013] As a further improvement of the above technical solution, the valve plate is provided with a first snap-fit ​​structure, the upper cover is provided with a second snap-fit ​​structure, and the first snap-fit ​​structure and the second snap-fit ​​structure are snap-connected.

[0014] As a further improvement of the above technical solution, a preliminary fixing component is provided between the valve plate and the upper cover, and the preliminary fixing component includes a preliminary fixing column and a preliminary fixing slot, and the preliminary fixing column and the preliminary fixing slot are plugged into each other, and the preliminary fixing column and the preliminary fixing slot are respectively arranged on the valve plate and the upper cover.

[0015] As a further improvement of the above technical solution, it also includes:

[0016] A cylinder body, wherein the cylinder body is fixed to the valve plate;

[0017] The leather cup structure comprises a fixing plate and a plurality of leather cup bodies, wherein the fixing plate is fixedly arranged between the cylinder body and the valve plate.

[0018] As a further improvement of the above technical solution, a third sealing assembly is provided between the leather cup body and the cylinder body, and the third sealing assembly includes a fifth sealing structure and a sixth sealing structure, and the fifth sealing structure and the sixth sealing structure are respectively arranged on the fixed plate and the cylinder body, and the fifth sealing structure and the sixth sealing structure correspond to each other one by one and are sealed and connected, and the fifth sealing structure and the sixth sealing structure are both annular structures.

[0019] As a further improvement of the above technical solution, the number of the third sealing components is at least two groups, and the multiple groups of the third sealing components are concentrically arranged.

[0020] As a further improvement of the above technical solution, at least one of the fifth sealing structures is arranged on the fixing plate, and at least one of the fifth sealing structures is arranged on the cylinder body.

[0021] As a further improvement of the above technical solution, the fifth sealing structure is an annular protrusion structure; and the sixth sealing structure is an annular groove structure.

[0022] The beneficial effect of the utility model is that the sealing performance between the sealing gasket, the upper cover and the valve plate can be improved, thereby improving the sealing performance of the diaphragm pump as a whole.

[0023] The utility model is used in the technical field of pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following is a brief description of the drawings required for the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present utility model, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0025] Figure 1 It is a schematic diagram of the explosion structure of an embodiment of the utility model;

[0026] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0027] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A;

[0028] Figure 4 yes Figure 2 A partial enlarged schematic diagram of part B.

[0029] In the figure, 100, upper cover; 110, second snap-fit ​​structure; 120, output pipe; 130, preliminary fixing column; 140, third sealing structure; 200, valve plate; 210, first snap-fit ​​structure; 220, input pipe; 230, preliminary fixing slot; 240, valve plate; 250, umbrella tack; 260, first sealing structure; 300, sealing gasket; 310, second sealing structure; 320, fourth sealing structure; 400, cylinder body; 500, bottom cover; 600, drive motor; 701, sixth sealing structure; 702, fifth sealing structure; 800, leather cup structure; 810, fixing plate; 820, leather cup body; 830, drive head; 901, eccentric wheel; 902, eccentric connecting rod; 903, swing frame. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0031] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] Reference Figures 1 to 4 The diaphragm pump includes a valve plate 200, an upper cover 100, a sealing gasket 300, a cylinder body 400, a bottom cover 500, a leather cup structure 800, and a driving motor 600.

[0034] The upper cover 100, the valve plate 200, the cylinder body 400, the bottom cover 500, and the driving motor 600 are connected in sequence.

[0035] A second buckle structure 110 is provided at one end of the upper cover 100. An output pipe 120 is provided in the middle of the upper cover 100. The output pipe 120 is a round tube structure, and a pagoda joint is provided at the end of the output pipe 120.

[0036] An input pipe 220 is disposed at the end of the valve plate 200, and the input pipe 220 is a circular tubular structure. Specifically, in this embodiment, the output pipe 120 is disposed in parallel with the input pipe 220. In other embodiments, both the input pipe 220 and the output pipe 120 may be disposed on the upper cover 100, and those skilled in the art may adjust the arrangement positions of the input pipe 220 and the output pipe 120 according to actual needs.

[0037] A first buckle structure 210 is disposed at one end of the valve plate 200 . The first buckle structure 210 and the second buckle structure 110 are disposed in one-to-one correspondence, and the first buckle structure 210 and the second buckle structure 110 are buckled and connected.

[0038] A preliminary fixing component is arranged between the valve plate 200 and the upper cover 100. Specifically, the preliminary fixing component includes a preliminary fixing slot 230 and a preliminary fixing column 130. Specifically, in the present embodiment, the preliminary fixing column 130 is arranged as a cylindrical structure, and the preliminary fixing slot 230 is a cylindrical groove structure. The preliminary fixing slot 230 and the preliminary fixing column 130 are plugged in and matched to preliminarily fix the valve plate 200 and the upper cover 100. The preliminary fixing component cooperates with the first snap-fit ​​structure 210 and the second snap-fit ​​structure 110 to preliminarily fix the valve plate 200 and the upper cover 100.

[0039] In other embodiments, the preliminary fixing slot 230 may be set to a square slot or a triangular slot structure, and the preliminary fixing column 130 may be set to a square column or a triangular column structure. The preliminary fixing column 130 and the preliminary fixing slot 230 are matched. Those skilled in the art may select the specific structure of the preliminary fixing column 130 and the preliminary fixing slot 230 according to actual needs.

[0040] The sealing gasket 300 is disposed between the valve plate 200 and the upper cover 100 .

[0041] A first sealing assembly is provided between the valve plate 200 and the sealing gasket 300. The first sealing assembly includes a second sealing structure 310 and a first sealing structure 260. The second sealing structure 310 and the first sealing structure 260 are plug-fitted and sealed, thereby enhancing the sealing performance between the valve plate 200 and the sealing gasket 300. Specifically, in the present embodiment, the first sealing structure 260 is provided as an annular groove structure, and the first sealing structure 260 is provided on the valve plate 200; the second sealing structure 310 is provided as an annular protrusion structure, and the second sealing structure 310 is provided on the sealing gasket 300. In other embodiments, the first sealing structure 260 may also be provided on the sealing gasket 300, and the second sealing structure 310 may be provided on the valve plate 200. Those skilled in the art may select the specific setting positions of the second sealing structure 310 and the first sealing structure 260 according to actual needs.

[0042] A second sealing component is provided between the upper cover 100 and the sealing gasket 300, and the second sealing component includes a fourth sealing structure 320 and a third sealing structure 140, and the fourth sealing structure 320 and the third sealing structure 140 are plugged and matched and sealed, thereby enhancing the sealing performance between the upper cover 100 and the sealing gasket 300. Specifically, in the present embodiment, the fourth sealing structure 320 is provided on the sealing gasket 300, and the fourth sealing structure 320 is provided as an annular groove structure, and the third sealing structure 140 is provided on the upper cover 100, and the third sealing structure 140 is provided as an annular protrusion structure. In other embodiments, the third sealing structure 140 may also be provided on the sealing gasket 300, and the fourth sealing structure 320 may be provided on the upper cover 100. Those skilled in the art may select the specific setting positions of the fourth sealing structure 320 and the third sealing structure 140 according to actual needs.

[0043] The valve plate 200 is installed with a valve sheet 240 and an umbrella tack 250 , and both the valve sheet 240 and the umbrella tack 250 are slidably connected to the valve plate 200 .

[0044] The valve plate 240 is disposed in the middle of the valve plate 200 , and the valve plate 240 is disposed corresponding to the output pipe 120 . The valve plate 240 is used to close or open the output pipe 120 to control whether the medium flows out of the output pipe 120 .

[0045] There are multiple umbrella tines 250, and the multiple umbrella tines 250 are arranged at intervals around the circumference of the valve plate 240. Specifically, in this embodiment, the number of umbrella tines 250 is set to three. In other embodiments, the number of umbrella tines 250 can also be set to four, five, etc. Those skilled in the art can adjust the number of umbrella tines 250 according to actual needs.

[0046] The valve plate 200 is provided with a medium inlet hole and a medium outlet hole.

[0047] The number of the medium outflow holes is set to be multiple, and the medium outflow holes are set corresponding to the valve plate 240 , and the multiple medium outflow holes are arranged at intervals around the circumference of the valve plate 240 .

[0048] The medium inlet holes are divided into three inlet hole groups, each of which includes a plurality of medium inlet holes, which are arranged at intervals around the central axis of the umbrella 250. The umbrella 250 is used to control the opening and closing of the medium inlet holes, thereby controlling the entry of liquid.

[0049] The cylinder body 400 is fixedly connected to the valve plate 200 .

[0050] The leather cup structure 800 is an elastic member, and includes a fixing plate 810 and a plurality of leather cup bodies 820, which are formed by integral molding. Specifically, the number of the leather cup bodies 820 is the same as the number of the umbrella 250.

[0051] The fixing plate 810 is disposed between the cylinder body 400 and the bottom cover 500 , and a third sealing component is disposed between the fixing plate 810 and the cylinder body 400 .

[0052] Specifically, in this embodiment, the number of third sealing components is set to be multiple, and the multiple third sealing components are divided into multiple sealing groups, each sealing group includes two third sealing components, that is, the number of third sealing components on the fixing plate 810 is set to twice the number of the leather cup body 820, each sealing group is set corresponding to a single leather cup body 820, and the two third sealing components in the same sealing group are concentrically arranged. In other embodiments, three, four, etc. third sealing components can also be set corresponding to a single leather cup body 820, and those skilled in the art can select the total number of third sealing components in each sealing group according to actual needs.

[0053] By providing a plurality of sealing groups, the plurality of sealing groups are provided correspondingly to the plurality of leather cup bodies 820 , so that the sealing performance between each leather cup body 820 and the cylinder body 400 is improved.

[0054] The third sealing assembly includes a sixth sealing structure 701 and a fifth sealing structure 702. The sixth sealing structure 701 and the fifth sealing structure 702 are respectively arranged on the cylinder body 400 and the fixing plate 810. The sixth sealing structure 701 is arranged as an annular groove structure, and the fifth sealing structure 702 is arranged as an annular protrusion structure. The two fifth sealing structures 702 in the same sealing group are respectively arranged on the cylinder body 400 and the fixing plate 810, and the two sixth sealing structures 701 in the same sealing group are respectively arranged on the fixing plate 810 and the cylinder body 400. In other embodiments, multiple fifth sealing structures 702 in the same sealing group can also be arranged on the cylinder body 400, and multiple sixth sealing structures 701 can be arranged on the fixing plate 810, or multiple fifth sealing structures 702 in the same sealing group can be arranged on the fixing plate 810, and multiple sixth sealing structures 701 can be arranged on the cylinder body 400. Those skilled in the art can select the setting positions of the fifth sealing structure 702 and the sixth sealing structure 701 according to actual needs.

[0055] The lower end of each leather cup body 820 is fixedly connected to a driving head 830 .

[0056] The driving motor 600 is fixedly connected to the bottom cover 500. The output shaft of the driving motor 600 passes through the bottom cover 500, and the output shaft of the driving motor 600 is fixedly installed with an eccentric wheel 901, and the eccentric wheel 901 is connected with an eccentric connecting rod 902, and the central axis of the eccentric connecting rod 902 is inclined with the driving axis of the output shaft of the driving motor 600. A swing frame 903 is installed in the bottom cover 500, and the swing frame 903 is connected with the eccentric connecting rod 902, and the hole head is spherically hingedly connected with the swing frame 903. When the driving motor 600 is working, the swing frame 903 will be driven to rotate through the eccentric wheel 901, the eccentric connecting rod 902 and other components, and the swing frame 903 will continuously compress and relax multiple leather cup structures 800 during the rotation process to achieve the steps of sucking and pumping out the medium.

[0057] The preferred implementation modes of the present invention are specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. Diaphragm pump, characterized in that: include: Valve plate; Upper cover; A sealing gasket, wherein the sealing gasket is arranged between the valve plate and the upper cover; a first sealing component is arranged between the sealing gasket and the valve plate, and a second sealing component is arranged between the sealing gasket and the upper cover, the first sealing component includes a first sealing structure and a second sealing structure, the first sealing structure and the second sealing structure are respectively arranged on the end faces of the valve plate and the sealing gasket, and the first sealing structure and the second sealing structure are sealed and connected; the second sealing component includes a third sealing structure and a fourth sealing structure, the third sealing structure and the fourth sealing structure are respectively arranged on the end faces of the upper cover and the sealing gasket, and the third sealing structure and the fourth sealing structure are sealed and connected.

2. The diaphragm pump according to claim 1, characterized in that: The first sealing structure is an annular groove structure, and the second sealing structure is an annular protrusion structure.

3. The diaphragm pump according to claim 1, characterized in that: The fourth sealing structure is an annular groove structure, and the third sealing structure is an annular protrusion structure.

4. The diaphragm pump according to claim 1, characterized in that: The valve plate is provided with a first snap-fit ​​structure, and the upper cover is provided with a second snap-fit ​​structure, and the first snap-fit ​​structure and the second snap-fit ​​structure are snap-fittedly connected.

5. The diaphragm pump according to claim 1, characterized in that: A preliminary fixing component is provided between the valve plate and the upper cover, and the preliminary fixing component includes a preliminary fixing column and a preliminary fixing slot. The preliminary fixing column and the preliminary fixing slot are plugged together, and the preliminary fixing column and the preliminary fixing slot are respectively arranged on the valve plate and the upper cover.

6. The diaphragm pump according to claim 1, characterized in that: Also includes: A cylinder body, wherein the cylinder body is fixed to the valve plate; The leather cup structure comprises a fixing plate and a plurality of leather cup bodies, wherein the fixing plate is fixedly arranged between the cylinder body and the valve plate.

7. The diaphragm pump according to claim 6, characterized in that: A third sealing assembly is provided between the leather cup body and the cylinder body, and the third sealing assembly includes a fifth sealing structure and a sixth sealing structure. The fifth sealing structure and the sixth sealing structure are respectively arranged on the fixing plate and the cylinder body, and the fifth sealing structure and the sixth sealing structure correspond to each other one by one and are sealed and connected, and the fifth sealing structure and the sixth sealing structure are both annular structures.

8. The diaphragm pump according to claim 7, characterized in that: The number of the third sealing components is at least two, and the multiple groups of the third sealing components are concentrically arranged.

9. The diaphragm pump according to claim 8, characterized in that: At least one of the fifth sealing structures is disposed on the fixing plate, at least one of the fifth sealing structures is disposed on the cylinder body, and the sixth sealing structure corresponds to the fifth sealing structure one by one.

10. A diaphragm pump according to claim 7, characterized in that: The fifth sealing structure is an annular protrusion structure; the sixth sealing structure is an annular groove structure.

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