Plane soft sealing check valve

Abstract

The utility model relates to the technical field of check valve devices, in particular to a plane soft sealing check valve which comprises a valve body. A valve cover is arranged at the top end of the valve body, a pressing rod is arranged in the valve body, a valve clack is arranged at the bottom end of the pressing rod, springs sleeve the outer side of the bottom end and the outer side of the middle of the pressing rod, a sealing ring is arranged at the bottom end of the valve clack, a sealing piece is arranged at the bottom end of the sealing ring, and the middle of the sealing ring and the middle of the sealing piece are fixedly connected with the valve clack through a pin shaft and a nut. The two spring structures are arranged and arranged on the pressing rod in a sleeving mode, the two ends of the spring can make contact with the two ends of the spring through the pressing connection effect of the pressing rod, vibration generated by the spring can be adsorbed and then released through structural deformation, and vibration damage to the valve deck and the valve body is reduced; therefore, the crimping effect is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of check valve devices, in particular to a plane soft-sealing check valve. Background Art

[0002] A check valve is a valve that automatically opens and closes the valve disc depending on the flow of the medium itself to prevent the medium from flowing back. It is also called a non-return valve, a one-way valve, a reverse flow valve, and a back pressure valve. A check valve is an automatic valve, and its main function is to prevent the medium from flowing back, to prevent the pump and the drive motor from reversing, and to release the container medium.

[0003] When the pressure of the gas medium flowing in from the inlet is sufficient, the valve disc moves upward and breaks away from the valve seat to open, allowing the gas medium to flow out from the outlet. When the gas medium flows in from the outlet, the valve disc is pressed tightly against the valve seat by pressure to prevent gas backflow. When the valve disc is pushed upward by pressure, the upper surface of the valve disc will hit the valve cover and produce adverse vibration. At the same time, the check valve in the air compressor needs to be opened and closed frequently. If the valve disc hits the valve cover many times, it will also cause damage to the valve disc and the valve cover. Utility Model Content

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a flat soft-sealed check valve, which can effectively solve the problem that the check valve in the prior art needs to be opened and closed frequently, and the valve disc repeatedly hits the valve cover and causes damage to the valve disc and the valve cover.

[0006] Technical Solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The utility model provides a flat soft-sealed check valve, comprising a valve body; a valve cover is arranged at the top of the valve body, a pressure rod is arranged inside the valve body, a valve disc is arranged at the bottom end of the pressure rod, springs are sleeved on the bottom end and the outer side of the middle part of the pressure rod, a sealing ring is arranged at the bottom end of the valve disc, a sealing sheet is arranged at the bottom end of the sealing ring, and the middle parts of the sealing ring and the sealing sheet are fixedly connected to the valve disc through a pin shaft and a nut.

[0009] Furthermore, the valve body and the valve cover are connected and fixed by bolts, and a circular groove structure is provided on the inner side of the top end of the valve body, and a fixing plate is sleeved in the groove structure. The fixing plate is a structure in which graphite material is bonded to the upper and lower sides of 304 stainless steel.

[0010] Furthermore, the sealing sheet is made of 304 stainless steel, and the sealing ring is made of PTFE.

[0011] Furthermore, the valve flap and the inner groove of the valve body are in interference fit.

[0012] Furthermore, two groups of springs are arranged on the pressure rod, and the bottom end of the spring structure at the bottom end contacts the top end of the valve disc, and the top end is fixedly connected to the pressure rod, and the top end of the spring at the top end contacts the valve cover, and the bottom end is fixedly connected to the pressure rod.

[0013] Furthermore, the valve flap and the spring are both made of 304 stainless steel.

[0014] Beneficial Effects

[0015] Compared with the known public technology, the technical solution provided by the utility model has the following beneficial effects:

[0016] 1. The utility model provides two sets of spring structures and sleeves them on the pressure rod. Through the pressure rod crimping effect, the two ends of the spring can contact the two ends thereof, and then through structural deformation, the vibration generated by the spring can be absorbed and released, thereby reducing the vibration damage to the valve cover and the valve body. Since one side of the spring is in contact and fixed with the external structure, the crimping effect is not affected.

[0017] 2. In this device, a fixing plate structure is set between the valve cover and the valve body. The fixing plate structure adopts a combination structure of 304 stainless steel and graphite to protect the contact surface between the valve cover and the valve body. The graphite material on the upper and lower sides can effectively reduce the collision between the two structures. The 304 structure in the middle can enhance the structural strength, which is convenient for users to replace and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 This is the structural front view of the utility model;

[0021] Figure 3 It is a structural cross-sectional view of the valve cover and valve body in the utility model.

[0022] The numbers in the figure represent: 1, valve body; 2, nut; 3, sealing plate; 4, sealing ring; 5, valve disc; 6, spring; 7, fixing plate; 8, valve cover; 9, bolt; 10, pressure rod. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model is further described below in conjunction with embodiments.

[0025] Example: Flat soft seal check valve, refer to the attached Figure 1 -Attached Figure 3 , including a valve body 1; a valve cover 8 is provided at the top of the valve body 1, a pressure rod 10 is provided inside the valve body 1, a valve disc 5 is provided at the bottom end of the pressure rod 10, a spring 6 is sleeved on the bottom end and the outer side of the middle part of the pressure rod 10, a sealing ring 4 is provided at the bottom end of the valve disc 5, a sealing sheet 3 is provided at the bottom end of the sealing ring 4, and the middle parts of the sealing ring 4 and the sealing sheet 3 are fixedly connected with the valve disc 5 through a pin and a nut 2; by providing two groups of spring 6 structures, and sleeved on the pressure rod 10, through the crimping effect of the pressure rod 10, the two ends of the spring 6 can contact with the two ends thereof, and then through the deformation of the structure, the vibration generated by it can be absorbed and released, thereby reducing the vibration damage to the valve cover 8 and the valve body 1, and since one side of the spring 6 is in contact and fixed with the external structure, it does not affect the crimping effect.

[0026] The valve body 1 and the valve cover 8 are connected and fixed by bolts 9, and a circular groove structure is provided on the inner side of the top of the valve body 1, and a fixing plate 7 is sleeved in the groove structure. The fixing plate 7 is a structure of 304 stainless steel with graphite material bonded on the upper and lower sides; the sealing plate 3 is made of 304 stainless steel, and the sealing ring 4 is made of PTFE; the valve disc 5 and the inner groove of the valve body 1 are interference fit; two groups of springs 6 are provided on the pressure rod 10, and the bottom end of the spring 6 structure at the bottom end contacts the top end of the valve disc 5, and the top end contacts the pressure rod 10. Fixed connection, the top end of the spring 6 at the top is in contact with the valve cover 8, and the bottom end is fixedly connected to the pressure rod 10; the valve disc 5 and the spring 6 are both made of 304 stainless steel; by arranging a fixing plate 7 structure between the valve cover 8 and the valve body 1, the fixing plate 7 structure adopts a combination structure of 304 stainless steel and graphite to protect the contact surface between the valve cover 8 and the valve body 1, and the graphite material on the upper and lower sides can effectively reduce the collision between the two structures, and the 304 structure in the middle can play a role in strengthening the structural strength, which is convenient for users to replace and disassemble.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. Flat soft seal check valve, characterized in that: The invention comprises a valve body (1); a valve cover (8) is arranged at the top end of the valve body (1); a pressure rod (10) is arranged inside the valve body (1); a valve flap (5) is arranged at the bottom end of the pressure rod (10); a spring (6) is sleeved on the bottom end and the outer side of the middle part of the pressure rod (10); a sealing ring (4) is arranged at the bottom end of the valve flap (5); a sealing sheet (3) is arranged at the bottom end of the sealing ring (4); and the middle parts of the sealing ring (4) and the sealing sheet (3) are fixedly connected to the valve flap (5) through a pin shaft and a nut (2).

2. The flat soft seal check valve according to claim 1, characterized in that: The valve body (1) and the valve cover (8) are connected and fixed by bolts (9), and a circular groove structure is provided on the inner side of the top end of the valve body (1), and a fixing plate (7) is sleeved in the groove structure. The fixing plate (7) is a structure of 304 stainless steel with graphite material bonded on the upper and lower sides.

3. The flat soft seal check valve according to claim 1, characterized in that: The sealing sheet (3) is made of 304 stainless steel, and the sealing ring (4) is made of PTFE.

4. The flat soft seal check valve according to claim 1, characterized in that: The valve flap (5) and the inner groove of the valve body (1) are in interference fit.

5. The flat soft seal check valve according to claim 4, characterized in that: The spring (6) is provided in two groups on the pressure rod (10), and the bottom end of the spring (6) structure at the bottom end contacts the top end of the valve flap (5), and the top end is fixedly connected to the pressure rod (10); the top end of the spring (6) at the top end contacts the valve cover (8), and the bottom end is fixedly connected to the pressure rod (10).

6. The flat soft seal check valve according to claim 1, characterized in that: The valve flap (5) and the spring (6) are both made of 304 stainless steel.

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