Sealing-resistant combined mushroom-shaped air valve

Abstract

The utility model discloses a sealing-resistant combined mushroom-shaped air valve, which comprises a valve seat, a sealing gasket, a valve cover, a double-thread screw, a valve core, a reset spring and a mounting seat, and aims to improve the static sealing effect among the valve seat, the valve core and the valve cover by arranging the sealing gasket between the valve seat and the valve cover and avoid gas leakage. The sealing gasket serves as a compensation part at the installation position between the valve seat and the valve cover, the machining difficulty of the installation faces of the valve seat and the valve cover is reduced, the yield is improved, the sealing face matched with the outer contour of the valve element is arranged at the sealing gasket, excessive abrasion of the valve element in the frequent opening and closing process is avoided, the valve element structure is protected, and the service life of the mushroom-shaped air valve is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of air valves, and in particular to a seal-resistant combined fungus-shaped air valve. Background Technology

[0002] Mushroom-shaped valves are characterized by large flow area and rapid opening and closing, and are widely used in compressors. However, traditional mushroom-shaped valves suffer from low yield. For example, patent number CN201621082052.9 discloses a 25-degree pneumatic valve for a reciprocating process compressor, which forms an airflow channel through a combination of valve seat and valve cover. To improve the airtightness of the airflow channel, the roughness of the contact surface between the valve seat and valve cover should not exceed Ra0.2, which requires grinding. This also places high demands on the machining precision of the valve seat and valve cover, resulting in low yield and increased production costs. Utility Model Content

[0003] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is: a sealing-resistant combined fungal valve, including a valve seat, a sealing gasket, a valve cover, a double-ended screw, a valve core, a return spring, and a mounting base. The valve seat is connected to the sealing gasket and the valve cover in sequence via the double-ended screw. The valve seat is provided with an air inlet, and the valve cover is provided with an air outlet, a transition cavity, and a mounting cavity. The air inlet communicates with the air outlet through the transition cavity. The mounting cavity is coaxially distributed with the air inlet. One end of the mounting cavity is snapped with the mounting base, and the other end is slidably connected to the valve core for blocking the air inlet. A return spring is provided between the valve core and the mounting base. The sealing gasket is provided with a sealing surface coaxially distributed with the air inlet. The valve core is sealed to the sealing gasket through the sealing surface.

[0004] By adopting the above technical solution, a sealing gasket is installed between the valve seat and the valve cover, thereby improving the static sealing effect between the valve seat, valve core and valve cover, and preventing gas leakage. The sealing gasket acts as a compensation component at the installation point between the valve seat and the valve cover, thereby reducing the processing difficulty of the valve seat and valve cover installation surface, improving the yield rate, and setting a sealing surface at the sealing gasket that matches the outer contour of the valve core, preventing excessive wear of the valve core during frequent opening and closing, thereby protecting the valve core structure and extending the service life of the mushroom-shaped gas valve.

[0005] The present invention is further configured such that the valve cover has an inner ring portion and an outer ring portion, the inner ring portion and the outer ring portion simultaneously abut against the inner and outer sides of the sealing gasket, and the transition cavity is formed between the inner ring portion and the outer ring portion.

[0006] Furthermore, the valve cover is provided with a central hole, and the sealing gasket and valve seat are provided with through holes and threaded holes coaxially distributed with the central hole.

[0007] By adopting the above technical solution, two sealing surfaces are formed on the inner and outer sides of the air valve through the inner and outer ring parts, which prevents the gas in the transfer cavity from leaking out. One end of the double-ended screw is threaded to the threaded hole, and the other end passes through the through hole and the center hole in sequence and is threaded to the nut. The nut is used to press the valve cover and the sealing gasket tightly and seal them to the valve seat. The overall structure is simple and easy to install.

[0008] The present invention is further configured such that the sealing surface is a conical surface, and the valve core is provided with a sealing head adapted to the conical surface.

[0009] The above technical solution, which adopts a conical surface structure, has the effect of increasing the contact area and automatically centering, effectively improving the sealing effect between the valve core and the sealing gasket.

[0010] The present invention is further configured such that the valve cover, the sealing gasket, and the valve seat are provided with coaxially distributed pin holes one, pin hole two, and pin hole three in sequence.

[0011] The above technical solution includes a positioning pin installed in the valve body assembly consisting of the valve seat, sealing gasket, and valve cover. The pin effectively assists the double-ended screw in fixing the valve body assembly and prevents the components from rotating relative to each other around the double-ended screw during installation.

[0012] The present invention is further configured such that the valve core has an inner cavity, the mounting base has a protrusion, one end of the reset spring is sleeved on the protrusion, and the other end is located in the inner cavity.

[0013] By adopting the above technical solution, the valve core is sealed by controlling the return spring, and a one-way structure is formed. The inner cavity and the protrusion are used to fix the return spring, preventing the return spring from bending or deflecting during compression, and ensuring the stability of the one-way structure.

[0014] The present invention is further configured such that the valve cover is provided with a pressure relief hole one at the mounting cavity, and the mounting base is provided with a pressure relief hole two, and the pressure relief hole one is connected to the inner cavity through the pressure relief hole two.

[0015] By adopting the above technical solution, a pressure relief channel is formed through pressure relief hole one and pressure relief hole two, which is used to dynamically balance the air pressure in the installation cavity, reduce the resistance of the valve core, and ensure that the valve core operates in place.

[0016] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3This is a half-sectional view of the valve seat of this utility model;

[0020] Figure 4 This is a front view of the sealing gasket of this utility model;

[0021] Figure 5 This is a half-sectional view of the valve cover of this utility model;

[0022] Figure 6 This is the utility model Figure 2 A magnified view of a section at point A in the middle;

[0023] Wherein: 1-valve seat, 2-sealing gasket, 3-valve cover, 4-double-ended screw, 5-valve core, 6-reset spring, 7-mounting seat, 14-threaded hole, 15-pin hole three, 21-sealing surface, 24-through hole, 25-pin hole two, 31-mounting cavity, 32-inner ring, 33-outer ring, 34-center hole, 35-pin hole one, 36-pressure relief hole one, 51-sealing head, 52-inner cavity, 71-protrusion, 72-pressure relief hole two, 100-inlet passage, 101-transfer cavity, 102-outlet passage; Detailed Implementation

[0024] The embodiments of this utility model will now be described with reference to the accompanying drawings. In this process, to ensure clarity and convenience, we may exaggerate the width of lines or the size of constituent elements in the drawings.

[0025] Furthermore, the terms used below are defined based on the functions of this utility model and may vary depending on the intentions or conventions of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0026] like Figure 1 , 2 As shown, this utility model provides a sealing-resistant combined fungal valve, including a valve seat 1, a sealing gasket 2, a valve cover 3, a double-ended screw 4, a valve core 5, a return spring 6, and a mounting base 7. The valve seat 1 is connected to the sealing gasket 2 and the valve cover 3 in sequence via the double-ended screw 4. The valve seat 1 has an air inlet 100, and the valve cover 3 has an air outlet 102, a transition cavity 101, and a mounting cavity 31. The air inlet 100 is connected to the air outlet 102 via the transition cavity 101. The mounting cavity 31 is coaxially distributed with the air inlet 100. One end of the mounting cavity 31 is snapped with the mounting base 7, and the other end is slidably connected to the valve core 5 for blocking the air inlet 100. A return spring 6 is provided between the valve core 5 and the mounting base 7. The sealing gasket 2 has a sealing surface 21 coaxially distributed with the air inlet 100, and the valve core 5 is sealed to the sealing gasket 2 via the sealing surface 21.

[0027] Combination Figure 3-5As shown, in this embodiment, the valve cover 3 is provided with an inner ring portion 32 and an outer ring portion 33. The inner ring portion 32 and the outer ring portion 33 simultaneously abut against the inner and outer sides of the sealing gasket 2, and a transition cavity 101 is formed between the inner ring portion 32 and the outer ring portion 33. The valve cover 3 is provided with a central hole 34. The sealing gasket 2 and the valve seat 1 are provided with through holes 24 and threaded holes 14 coaxially distributed with the central hole 34. The inner ring portion 32 and the outer ring portion 33 form two sealing surfaces 21 on the inner and outer sides of the air valve, preventing gas leakage from the transition cavity 101. One end of the double-ended screw 4 is threaded to the threaded hole 14, and the other end passes through the through hole 24 and the central hole 34 in sequence and is threaded to a nut. The nut is used to press the valve cover 3 and the sealing gasket 2 tightly and seal them to the valve seat 1. The overall structure is simple and easy to install.

[0028] In this embodiment, the sealing surface 21 is a conical surface, and the valve core 5 is provided with a sealing head 51 that is adapted to the conical surface. The conical surface structure has the effect of increasing the contact area and automatic centering, which effectively improves the sealing effect between the valve core 5 and the sealing gasket 2.

[0029] In this embodiment, the valve cover 3, the sealing gasket 2, and the valve seat 1 are sequentially provided with coaxially distributed pin holes 35, 25, and 15. A positioning pin is installed in the valve body assembly composed of the valve seat 1, the sealing gasket 2, and the valve cover 3. The pin effectively assists the double-ended screw 4 in fixing the valve body assembly and prevents the various components from rotating relative to each other around the double-ended screw 4 during installation.

[0030] Combination Figure 6 As shown, in this embodiment, the valve core 5 has an inner cavity 52, the mounting base 7 has a protrusion 71, one end of the return spring 6 is sleeved on the protrusion 71, and the other end is located in the inner cavity 52. ​​The valve core 5 is sealed by the return spring 6, forming a one-way structure. The inner cavity 52 and the protrusion 71 are used to fix the return spring 6 to prevent the return spring 6 from bending or deflecting during compression, thus ensuring the stability of the one-way structure. The valve cover 3 is provided with a pressure relief hole 36 in the mounting cavity 31, and the mounting base 7 is provided with a pressure relief hole 72. The pressure relief hole 36 is connected to the inner cavity 52 through the pressure relief hole 72. The pressure relief hole 36 and the pressure relief hole 72 form a pressure relief channel to dynamically balance the air pressure in the mounting cavity 31, reduce the resistance of the valve core 5, and ensure that the valve core 5 moves in place.

[0031] The working principle of this invention is that each air intake 100 is equipped with an independent one-way structure. When gas is input from the air intake 100, the valve core 5 is pushed open under the action of air pressure, the return spring 6 is compressed, and the airflow flows out from the air outlet 102 through the transfer chamber 101. When the air pressure of the air intake 100 is lower than the preset value, the valve core 5 is pressed back against the sealing gasket 2 under the action of the return spring 6 to prevent gas diversion, thereby realizing multi-hole one-way ventilation.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A seal-resistant, combined fungal-shaped gas valve, characterized in that, The valve includes a valve seat (1), a sealing gasket (2), a valve cover (3), a double-ended screw (4), a valve core (5), a return spring (6), and a mounting base (7). The valve seat (1) is connected to the sealing gasket (2) and the valve cover (3) in sequence via the double-ended screw (4). The valve seat (1) is provided with an air inlet (100), and the valve cover (3) is provided with an air outlet (102), a transition chamber (101), and a mounting cavity (31). The air inlet (100) is connected to the air outlet (102) via the transition chamber (101). 102) Connected, the mounting cavity (31) is coaxially distributed with the air intake (100). One end of the mounting cavity (31) is snapped with the mounting seat (7), and the other end is slidably connected with the valve core (5) for blocking the air intake (100). A return spring (6) is provided between the valve core (5) and the mounting seat (7). The sealing gasket (2) is provided with a sealing surface (21) coaxially distributed with the air intake (100). The valve core (5) is sealed and connected to the sealing gasket (2) through the sealing surface (21).

2. The sealing-resistant combined fungal gas valve according to claim 1, characterized in that: The valve cover (3) is provided with an inner ring (32) and an outer ring (33). The inner ring (32) and the outer ring (33) simultaneously abut against the inner and outer sides of the sealing gasket (2), and the transition cavity (101) is formed between the inner ring (32) and the outer ring (33).

3. The sealing-resistant combined fungal gas valve according to claim 2, characterized in that: The valve cover (3) is provided with a central hole (34), and the sealing gasket (2) and valve seat (1) are provided with through holes (24) and threaded holes (14) coaxially distributed with the central hole (34).

4. The sealing-resistant combined fungal gas valve according to claim 3, characterized in that: The valve cover (3), sealing gasket (2), and valve seat (1) are provided with coaxially distributed pin holes one (35), pin hole two (25) and pin hole three (15).

5. The sealing-resistant combined fungal gas valve according to claim 1, characterized in that: The sealing surface (21) is a conical surface, and the valve core (5) is provided with a sealing head (51) that is adapted to the conical surface.

6. The sealing-resistant combined fungal valve according to claim 1, characterized in that: The valve core (5) has an inner cavity (52), the mounting base (7) has a protrusion (71), one end of the return spring (6) is sleeved on the protrusion (71), and the other end is located in the inner cavity (52).

7. A seal-resistant combined fungal gas valve according to claim 6, characterized in that: The valve cover (3) is provided with a pressure relief hole 1 (36) at the mounting cavity (31), and the mounting base (7) is provided with a pressure relief hole 2 (72). The pressure relief hole 1 (36) is connected to the inner cavity (52) through the pressure relief hole 2 (72).

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