Sealing structure of diaphragm pump

Abstract

The utility model relates to the technical field of diaphragm pumps, in particular to a sealing structure of a diaphragm pump, which comprises a bottom plate and a mounting plate, a diaphragm pump body is fixedly mounted at the top of the mounting plate and consists of a first diaphragm chamber shell and a second diaphragm chamber shell, and a sealing component is arranged on the second diaphragm chamber shell. According to the sealing structure of the diaphragm pump, the sealing assembly is arranged, the sealing ring is arranged in the sealing groove, the sealing performance between the first diaphragm chamber shell and the second diaphragm chamber shell can be improved, the diaphragm pump body is a plastic product, and the problems caused by thermal expansion and cold contraction can be reduced through the formed assembling hole; the limiting block is arranged on the connecting part, so that the connecting part can generate tiny deformation and has a deformation space, and when the bolt and the nut are matched to assemble the diaphragm pump body, the limiting block can limit the position of the nut, so that the connecting stability of the first diaphragm chamber shell and the second diaphragm chamber shell can be improved, and the sealing performance of the diaphragm pump body is further ensured.

Description

Technical Field

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

[0002] The diaphragm pump, also known as the control pump, is the main type of actuator. It receives the control signal output by the regulating control unit and uses power operation to change the fluid flow. The role of the diaphragm pump in the control process is to receive the control signal of the regulator or computer, change the flow of the regulated medium, and maintain the regulated parameters within the required range, thereby achieving automation of the production process.

[0003] For example, announcement number CN219012828U proposes a vacuum diaphragm pump that is easy to replace a sealing component, including a base, a connecting pipe is fixedly provided on the top of the base, a first diaphragm chamber shell is fixedly provided on both sides of the inner side of the connecting pipe, a first connecting component is provided on the side where the two first diaphragm chamber shells are close to each other, and a second diaphragm chamber shell is provided on the side where the two first connecting components are close to each other. However, during use of this utility model, since the diaphragm pump will vibrate when in use, the diaphragm pump has a large amplitude when working, and the shells of the diaphragm pump are connected and fixed by bolts and nuts. Large-scale vibrations will cause the bolts at the connection of the diaphragm pump to slip, affecting the sealing of the diaphragm pump, so a sealing structure of the diaphragm pump is proposed. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a sealing structure for a diaphragm pump, which has the advantages of stable connection and good sealing. It solves the problem that the housing of the diaphragm pump is connected and fixed by bolts and nuts, and large-scale shaking will cause the bolts at the connection of the diaphragm pump to slip, thereby affecting the sealing of the diaphragm pump.

[0005] To achieve the above object, the utility model provides the following technical solutions: a sealing structure of a diaphragm pump, comprising a bottom plate and a mounting plate, a diaphragm pump body is fixedly mounted on the top of the mounting plate, the diaphragm pump body is composed of a first diaphragm chamber shell and a second diaphragm chamber shell, a sealing assembly is arranged on the second diaphragm chamber shell, and a buffer assembly is arranged on the bottom plate;

[0006] The sealing assembly includes a plurality of assembly holes opened inside the first diaphragm chamber shell and the second diaphragm chamber shell, a sealing groove is opened inside the second diaphragm chamber shell, a sealing ring is fixedly connected inside the sealing groove, a bolt is slidably connected inside the assembly hole, a nut is threadedly connected to the outer side of the bolt, a limiting block for limiting the nut is sleeved on the outer side of the bolt, a clamping rod for fixing the limiting block is slidably connected to the front side of the limiting block, a pull plate is fixedly connected to the front side of the clamping rod, and a reset spring for driving the clamping rod to reset is sleeved on the outer side of the clamping rod.

[0007] By adopting the above technical solution, the position of the nut can be conveniently limited by the limiting block during use, which can improve the stability of the connection between the first diaphragm chamber housing and the second diaphragm chamber housing, thereby ensuring the sealing of the diaphragm pump body.

[0008] Furthermore, a buffer assembly is arranged on the bottom plate, and the buffer assembly includes a plurality of dampers fixedly connected to the top of the bottom plate, and a buffer spring is sleeved on the outer side of the damper.

[0009] By adopting the above technical solution, it is convenient to buffer the force generated by the vibration of the diaphragm pump body during operation, thereby ensuring the stability of the diaphragm pump body and reducing the occurrence of thread slippage of the bolts at the connection due to vibration.

[0010] Furthermore, a threaded through hole threadably connected to the bolt is provided inside the nut.

[0011] By adopting the above technical solution, the nut can be conveniently connected to the bolt through the threaded through hole during use.

[0012] Furthermore, one end of the clamping rod passes through and extends to the interior of the limiting block, and a clamping groove matching the size of the clamping rod is provided on the front side of the bolt.

[0013] By adopting the above technical solution, the clamping rod is conveniently connected to the limiting block through the clamping slot during use.

[0014] Furthermore, one end of the return spring is fixedly connected to the front side of the limiting block, and the other end of the return spring is fixedly connected to the back side of the pulling plate.

[0015] By adopting the above technical solution, it is convenient to drive the clamping rod to reset through the tension of the reset spring during use.

[0016] Furthermore, one end of the damper is fixedly connected to the bottom of the mounting plate.

[0017] By adopting the above technical solution, it is convenient to buffer and reduce shock of the diaphragm pump body on the top of the mounting plate through the damper during use.

[0018] Furthermore, one end of the buffer spring is fixedly connected to the top of the base plate, and the other end of the buffer spring is fixedly connected to the bottom of the mounting plate.

[0019] By adopting the above technical solution, it is convenient to improve the buffering and shock-absorbing effect of the diaphragm pump body through the buffer spring during use.

[0020] Furthermore, the limiting block abuts against the nut.

[0021] By adopting the above technical solution, it is convenient to limit the nut by the limiting block during use.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] 1. The sealing structure of the diaphragm pump can improve the sealing between the first diaphragm chamber housing and the second diaphragm chamber housing by setting a sealing component and a sealing ring in a sealing groove. Since the diaphragm pump body is a plastic product, the problems caused by thermal expansion and contraction can be reduced by opening an assembly hole, so that the connection part can undergo slight deformation and there is deformation space. When the diaphragm pump body is assembled by bolts and nuts, the limiting block can limit the position of the nut, which can improve the stability of the connection between the first diaphragm chamber housing and the second diaphragm chamber housing, thereby ensuring the sealing of the diaphragm pump body.

[0024] 2. The sealing structure of the diaphragm pump can buffer the force generated by the vibration of the diaphragm pump body during operation by providing a buffer component, thereby ensuring the stability of the diaphragm pump body and reducing the situation where the bolts at the connection are stripped due to the influence of vibration. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 2 This is a side view of the second diaphragm chamber housing structure of the utility model;

[0027] Figure 3 This is a bottom view of the connection structure between the limiting block and the clamping rod of the utility model.

[0028] In the figure: 1. diaphragm pump body; 2. first diaphragm chamber shell; 3. second diaphragm chamber shell; 4. mounting plate; 5. bottom plate; 6. bolts; 7. nuts; 8. limiting blocks; 9. pull plates; 10. dampers; 11. buffer springs; 12. assembly holes; 13. sealing grooves; 14. clamping rods; 15. return springs; 16. sealing rings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-3 A sealing structure of a diaphragm pump in this embodiment includes a base plate 5 and a mounting plate 4, a diaphragm pump body 1 is fixedly mounted on the top of the mounting plate 4, the diaphragm pump body 1 is composed of a first diaphragm chamber shell 2 and a second diaphragm chamber shell 3, a sealing assembly is arranged on the second diaphragm chamber shell 3, and a buffer assembly is arranged on the base plate 5.

[0031] The sealing assembly includes a plurality of assembly holes 12 which are opened inside the first diaphragm chamber housing 2 and the second diaphragm chamber housing 3, a sealing groove 13 is opened inside the second diaphragm chamber housing 3, a sealing ring 16 is fixedly connected inside the sealing groove 13, a bolt 6 is slidably connected inside the assembly hole 12, a nut 7 is threadedly connected to the outer side of the bolt 6, a threaded through hole threadedly connected to the bolt 6 is opened inside the nut 7, a limiting block 8 for limiting the nut 7 is sleeved on the outer side of the bolt 6, the limiting block 8 abuts against the nut 7, a clamping rod 14 for fixing the limiting block 8 is slidably connected to the front side of the limiting block 8, one end of the clamping rod 14 passes through and extends to the inside of the limiting block 8, a clamping groove matching the size of the clamping rod 14 is opened on the front side of the bolt 6, a pull plate 9 is fixedly connected to the front side of the clamping rod 14, a reset spring 15 for driving the clamping rod 14 to reset is sleeved on the outer side of the clamping rod 14, one end of the reset spring 15 is fixedly connected to the front side of the limiting block 8, and the other end of the reset spring 15 is fixedly connected to the back side of the pull plate 9.

[0032] It should be noted that, by setting up a sealing assembly and a sealing ring 16 arranged in the sealing groove 13, the sealing between the first diaphragm chamber housing 2 and the second diaphragm chamber housing 3 can be improved. Since the diaphragm pump body 1 is a plastic product, the problems caused by thermal expansion and contraction can be reduced by opening the assembly hole 12, so that the connection part can undergo slight deformation and there is deformation space. When the diaphragm pump body 1 is assembled by the bolt 6 and the nut 7, the limiting block 8 can limit the position of the nut 7, which can improve the stability of the connection between the first diaphragm chamber housing 2 and the second diaphragm chamber housing 3, thereby ensuring the sealing of the diaphragm pump body 1.

[0033] See also Figure 1The buffer assembly includes a plurality of dampers 10 fixedly connected to the top of the base plate 5, one end of the damper 10 is fixedly connected to the bottom of the mounting plate 4, a buffer spring 11 is sleeved on the outer side of the damper 10, one end of the buffer spring 11 is fixedly connected to the top of the base plate 5, and the other end of the buffer spring 11 is fixedly connected to the bottom of the mounting plate 4.

[0034] It should be noted that by providing a buffer assembly, the force generated when the diaphragm pump body 1 vibrates during operation can be buffered, thereby ensuring the stability of the diaphragm pump body 1 and reducing the possibility of thread slippage of the bolts 6 at the connection due to vibration.

[0035] The working principle of the above embodiment is:

[0036] The sealing structure of the diaphragm pump is assembled during the use of the diaphragm pump body 1. The first diaphragm chamber housing 2 and the second diaphragm chamber housing 3 are connected by bolts 6, and then the first diaphragm chamber housing 2 and the second diaphragm chamber housing 3 are locked by nuts 7. Then, the clamping rod 14 is moved by pulling the pull plate 9 to stretch the reset spring 15. Then, the limiting block 8 is sleeved on the outside of the bolt 6 to make the limiting block 8 abut against the nut 7. The pull plate 9 is loosened, and the clamping rod 14 is reset by the tension of the reset spring 15, so that the clamping rod 14 and the limiting block 8 are opened. The designed slot connection fixes the position of the limiting block 8, and the position of the nut 7 can be limited by the limiting block 8, which can improve the stability of the connection between the first diaphragm chamber shell 2 and the second diaphragm chamber shell 3, thereby ensuring the sealing of the diaphragm pump body 1. In addition, the provided damper 10 and buffer spring 11 can buffer the force generated by the vibration of the diaphragm pump body 1 during operation, thereby ensuring the stability of the diaphragm pump body 1 and reducing the stripping of the bolts 6 at the connection due to the influence of vibration, which is convenient for users to use.

Claims

1. A sealing structure for a diaphragm pump, comprising a base plate (5) and a mounting plate (4), characterized in that: A diaphragm pump body (1) is fixedly mounted on the top of the mounting plate (4), wherein the diaphragm pump body (1) is composed of a first diaphragm chamber shell (2) and a second diaphragm chamber shell (3), and a sealing assembly is provided on the second diaphragm chamber shell (3); The sealing assembly comprises a plurality of assembly holes (12) provided inside the first diaphragm chamber housing (2) and the second diaphragm chamber housing (3); a sealing groove (13) is provided inside the second diaphragm chamber housing (3); a sealing ring (16) is fixedly connected inside the sealing groove (13); a bolt (6) is slidably connected inside the assembly hole (12); a nut (7) is threadedly connected to the outer side of the bolt (6); a limiting block (8) for limiting the nut (7) is sleeved on the outer side of the bolt (6); a clamping rod (14) for fixing the limiting block (8) is slidably connected to the front side of the limiting block (8); a pull plate (9) is fixedly connected to the front side of the clamping rod (14); and a reset spring (15) for driving the clamping rod (14) to reset is sleeved on the outer side of the clamping rod (14).

2. A sealing structure for a diaphragm pump according to claim 1, characterized in that: A buffer assembly is provided on the bottom plate (5), the buffer assembly comprising a plurality of dampers (10) fixedly connected to the top of the bottom plate (5), and a buffer spring (11) is sleeved on the outer side of the damper (10).

3. A sealing structure for a diaphragm pump according to claim 1, characterized in that: A threaded through hole is provided inside the nut (7) and is threadedly connected to the bolt (6).

4. The sealing structure of a diaphragm pump according to claim 1, characterized in that: One end of the clamping rod (14) penetrates through and extends into the interior of the limiting block (8), and a clamping groove matching the size of the clamping rod (14) is provided on the front surface of the bolt (6).

5. The sealing structure of a diaphragm pump according to claim 1, characterized in that: One end of the return spring (15) is fixedly connected to the front side of the limiting block (8), and the other end of the return spring (15) is fixedly connected to the back side of the pulling plate (9).

6. A sealing structure for a diaphragm pump according to claim 2, characterized in that: One end of the damper (10) is fixedly connected to the bottom of the mounting plate (4).

7. The sealing structure of a diaphragm pump according to claim 2, characterized in that: One end of the buffer spring (11) is fixedly connected to the top of the bottom plate (5), and the other end of the buffer spring (11) is fixedly connected to the bottom of the mounting plate (4).

8. The sealing structure of a diaphragm pump according to claim 1, characterized in that: The limiting block (8) abuts against the nut (7).

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