Pneumatic proportional stop valve

Abstract

The pneumatic proportional stop valve relates to the technical field of valves and comprises a valve body, the valve body is provided with an air inlet channel, an air outlet channel and a connecting channel, the air inlet channel and the air outlet channel both communicate with the connecting channel, the inner wall of the connecting channel is connected with an abutting ring, the valve body is slidably connected with a valve rod, and the valve rod is connected with a valve deck. The valve cover is used for covering an opening of the abutting ring, the valve body is connected with a driving assembly used for driving the valve rod to slide in the direction close to or away from the abutting ring, the valve rod is provided with a boss, the boss abuts against the valve cover and is located between the valve cover and an air outlet of the air inlet channel, and the side, away from the valve cover, of the boss is provided with an inclined face. Gas in the connecting channel makes contact with the inclined face and flows in the inclined direction of the inclined face, the inclined face plays a role in guiding flowing of the gas, and the gas in the gas inlet channel conveniently flows into the gas outlet channel through the connecting channel.

Description

Technical Field

[0001] The present application relates to the technical field of valves, and in particular to a pneumatic proportional cut-off valve. Background Art

[0002] A valve is a device used to control the flow of fluids (liquids, gases, steam, etc.). It regulates the flow, pressure and direction of the fluid by changing the size of the channel or opening inside the valve. Valves are widely used in various industrial and civil systems, such as petroleum, chemical, water treatment, heating, refrigeration, food processing, etc.

[0003] The existing Chinese patent with publication number CN115467990A discloses a valve with a flow regulating mechanism, including a valve body, a valve cover arranged on the valve body, a valve stem installed on the valve cover and extending into the valve body, an opening and closing member arranged on the valve stem, and a butt joint pipe connected to the valve body and having a flow channel, wherein an elastic inner tube is arranged in the flow channel and the two ends of the inner tube extend to the two ends of the butt joint pipe respectively, a mounting seat with an inner cavity is fixedly arranged on the outer wall of the butt joint pipe and the inner cavity is communicated with the flow channel, an adjusting push rod is slidably arranged in the inner cavity and reciprocates toward the inner tube, and the outer wall of the mounting seat is provided with a connecting inner tube. A control port of the cavity, a transmission member is provided in the inner cavity, a locking assembly for limiting the movement of the transmission member is provided at a position of the inner cavity wall near the control port, the transmission member reciprocates between the locking assembly and the adjusting push rod, a driving adjusting push rod is provided in the inner cavity and is always linked with the transmission member and drives the transmission member to move toward the locking assembly so that the transmission member and the locking assembly form a locking fit and at the same time an elastic pressing assembly protrudes from the control port, a control assembly for controlling the movement of the transmission member and a trigger assembly for triggering the transmission member to leave the locking assembly are provided on the outer side of the mounting seat, and the control assembly moves with the trigger assembly.

[0004] The valve with the flow regulating mechanism has a simple structure, a high safety factor and better durability. However, the valve with the flow regulating mechanism has some disadvantages, such as when the opening and closing member is in an open state, the gas at the inlet of the valve body will flow into the groove of the opening and closing member, affecting the movement of the gas at the inlet of the valve body to the outlet of the valve body, which needs to be improved. Summary of the invention

[0005] The purpose of the present application is to provide a pneumatic proportional cut-off valve to facilitate the gas in the inlet channel to flow into the outlet channel.

[0006] A pneumatic proportional cut-off valve provided in the present application adopts the following technical solution: it includes a valve body, the valve body is provided with an air inlet channel, an air outlet channel and a connecting channel, the air inlet channel and the air outlet channel are both communicated with the connecting channel, the inner wall of the connecting channel is connected with an abutment ring, the valve body is slidably connected with a valve stem, the valve stem is connected with a valve cover, the valve cover is used to cover the opening of the abutment ring, the valve body is connected with a driving component for driving the valve stem to slide in a direction close to or away from the abutment ring, the valve stem is provided with a boss, the boss abuts with the valve cover, the boss is located between the valve cover and the air outlet of the air inlet channel, and the boss is provided with an inclined surface on the side away from the valve cover.

[0007] By adopting the above technical solution, the driving assembly drives the valve stem to slide, so that the valve cover is separated from the abutment ring. The gas enters the connecting channel through the air inlet channel, and the gas in the connecting channel contacts the inclined surface and flows along the inclined direction of the inclined surface. The inclined surface guides the flow of the gas, making it convenient for the gas in the air inlet channel to flow into the air outlet channel through the connecting channel.

[0008] Optionally, the drive assembly includes a mounting body connected to the valve body, a piston connected to the valve stem and a plurality of elastic structures connected to the piston, the valve stem slidingly cooperates with the mounting body, the mounting body is provided with a mounting cavity for slidingly cooperating with the piston, the outer peripheral surface of the piston is in contact with the inner wall of the mounting cavity, one end of the elastic structure abuts against the piston, and the other end abuts against the inner wall of the mounting cavity, the mounting body is provided with an air hole, and the air hole is connected to the mounting cavity.

[0009] By adopting the above technical solution, the air hole is inflated with air through an external air pump, the air pressure between the piston and the mounting body increases, the piston slides in the direction away from the abutment ring, the elastic structure is compressed to produce elastic deformation and maintain the tendency of elastic reset. During the movement of the piston, the valve cover and the abutment ring are separated, and the gas in the connecting channel flows into the outlet channel through the gap between the valve cover and the abutment ring. The larger the volume of gas filled in the mounting cavity, the farther the piston moves, that is, the farther the distance between the valve cover and the abutment ring, and the greater the gas flow from the inlet channel to the outlet channel, which facilitates the adjustment of the size of the airflow in the valve body.

[0010] Optionally, the mounting body is connected to an intermediate block, which is located between the elastic structure and the valve cover, the valve stem passes through the intermediate block, the valve stem sleeve is provided with a reset member, one end of the reset member is connected to the valve stem, and the other end is connected to the intermediate block, and the elastic coefficient of the elastic structure is greater than the elastic coefficient of the reset member.

[0011] By adopting the above technical solution, when air is inflated into the air hole, the valve stem and the piston both move in the direction away from the abutment ring, and the elastic structure and the reset member are both compressed to produce elastic deformation and maintain a tendency of elastic reset; when the gas in the installation cavity is extracted through the air hole, the elastic structure and the reset member are elastically reset. Since the elastic coefficient of the elastic structure is greater than the elastic coefficient of the reset member, the elastic reset of the elastic structure is slower, and the elastic reset of the reset member is faster, and the reset member improves the efficiency of valve cover reset.

[0012] Optionally, the mounting body includes a mounting shell connected to the valve body, a limiting rod connected to the mounting shell, a sealing membrane connected to the mounting shell, a mounting cover slidably connected to the limiting rod, and a limiting block threadedly connected to the limiting rod, the limiting block abuts against the mounting cover, the mounting cover is located between the limiting block and the mounting shell, the sealing membrane is connected to the mounting cover at one end away from the mounting shell, the sealing membrane, the mounting shell and the mounting cover enclose the mounting cavity, the sealing membrane surrounds the piston, and the outer circumferential surface of the piston fits with the inner ring of the sealing membrane.

[0013] By adopting the above technical solution, when adjusting the distance between the mounting shell and the mounting cover, the mounting cover is pressed in the direction close to the mounting shell, and the elastic structure is compressed to produce elastic deformation and maintain the tendency of elastic reset. When the mounting cover moves to the corresponding position, the limit block is rotated so that the limit block abuts against the mounting cover, and the limit block plays a role in limiting the movement of the mounting cover. The elastic structure applies force to the piston, and a large air pressure is required in the connecting channel to move the valve cover, thereby improving the sealing between the valve cover and the abutment ring.

[0014] Optionally, the mounting cover is connected to an active rod, and one end of the active rod away from the mounting cover is connected to a handle.

[0015] By adopting the above technical solution, the mounting cover can be easily driven by the handle to move toward or away from the mounting shell.

[0016] Optionally, the mounting cover is connected to a flat-head muffler.

[0017] By adopting the above technical solution, the flat-head muffler reduces noise through the interference and reflection of sound waves.

[0018] Optionally, the elastic structure includes an outer spring and an inner spring, the outer spring is sleeved on the inner spring, one end of the outer spring abuts against the mounting cover, and the other end abuts against the piston, and one end of the inner spring abuts against the mounting cover, and the other end abuts against the piston.

[0019] By adopting the above technical solution, the inner spring is sleeved inside the outer spring, which not only reduces the volume occupied but also improves the shock absorption effect.

[0020] Optionally, the piston is provided with a protrusion, the protrusion is provided with a groove for one end of the inner spring to be inserted into, and the outer spring surrounds the protrusion.

[0021] By adopting the above technical solution, the outer surface of the inner spring fits with the inner wall of the groove, and the inner wall of the groove restricts the movement of the inner spring, thereby improving the stability of the inner spring being pressed. The inner circumference of the outer spring fits with the outer surface of the protrusion, and the protrusion restricts the movement of the outer spring, thereby improving the stability of the outer spring being pressed.

[0022] Optionally, a sealing gasket is connected to a side of the valve cover close to the abutment ring, and the abutment ring abuts against the sealing gasket.

[0023] By adopting the above technical solution, when the sealing gasket abuts against the abutment ring, the sealing gasket undergoes elastic deformation, and the sealing gasket seals the gap between the abutment ring and the valve cover, reducing the gas passing through the gap between the abutment ring and the valve cover, thereby improving air tightness.

[0024] Optionally, the boss is provided with a guide rod, the valve body is provided with a guide groove, the connecting channel is communicated with the guide groove, and the guide rod is slidably matched with the guide groove.

[0025] By adopting the above technical solution, when the boss slides, the sliding cooperation between the guide rod and the guide groove plays a guiding and limiting role in the sliding of the guide rod, thereby improving the sliding stability of the valve cover and improving the abutment effect between the valve cover and the abutment ring.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The gas enters the connecting channel through the air inlet channel. The gas in the connecting channel contacts the inclined surface and flows along the inclined direction of the inclined surface. The inclined surface guides the flow of the gas, making it convenient for the gas in the air inlet channel to flow into the air outlet channel through the connecting channel.

[0027] 2. When air is inflated into the air hole, the valve stem and the piston both move away from the abutment ring, and the elastic structure and the reset member are both compressed to produce elastic deformation and maintain a tendency of elastic reset; when the gas in the installation cavity is extracted through the air hole, the elastic structure and the reset member are elastically reset. Since the elastic coefficient of the elastic structure is greater than the elastic coefficient of the reset member, the elastic reset of the elastic structure is slower, and the elastic reset of the reset member is faster, and the reset member improves the efficiency of valve cover reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an exploded view of an embodiment of the present application.

[0029] Figure 2 It is a cross-sectional view of an embodiment of the present application.

[0030] Figure 3 yes Figure 2 A magnified image of area A.

[0031] Figure 4 yes Figure 2 Magnified view of area B.

[0032] Figure 5 yes Figure 2 Magnified view of region C.

[0033] Description of reference numerals: 1, valve body; 11, air inlet channel; 12, air outlet channel; 13, connecting channel; 14, guide groove; 2, abutment ring; 21, guide surface; 3, valve stem; 31, valve cover; 32, sealing gasket; 33, boss; 331, inclined surface; 34, guide rod; 4, drive assembly; 41, mounting body; 411, mounting shell; 4111, air hole; 4112, mounting groove; 412, Limit rod; 413, sealing film; 414, mounting cover; 4141, flat-head muffler; 4142, active rod; 4143, handle; 415, limit block; 416, mounting cavity; 42, piston; 421, bump; 422, groove; 43, elastic structure; 431, outer spring; 432, inner spring; 5, intermediate block; 51, reset member; 6, lower retaining ring; 7, middle gasket; 8, upper retaining ring. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1 -Attached Figure 5 This application is described in further detail.

[0035] The embodiment of the present application discloses a pneumatic proportional cut-off valve.

[0036] Combination Figure 1 , Figure 2 and Figure 3As shown, the valve body 1 includes a valve body 1, which is provided with an air inlet channel 11, an air outlet channel 12 and a connecting channel 13, and the air inlet channel 11 and the air outlet channel 12 are both connected to the connecting channel 13. The inner wall of the connecting channel 13 is detachably connected with an abutting ring 2, and the abutting ring 2 is connected to the valve body 1 by a plurality of bolts. The valve body 1 is slidably connected with a valve stem 3, and the valve stem 3 is fixedly connected with a valve cover 31, and the valve cover 31 can cover the opening of the abutting ring 2. A sealing gasket 32 ​​is fixedly connected to the side of the valve cover 31 close to the abutting ring 2. When the valve cover 31 covers the opening of the abutting ring 2, the abutting ring 2 abuts against the sealing gasket 32. The valve stem 3 is provided with a boss 33, which is integrally formed with the valve stem 3, and abuts against the valve cover 31. An inclined surface 331 is provided on the side of the boss 33 away from the valve cover 31, and a gap is formed between the edge of the boss 33 and the abutting ring 2 to prevent the boss 33 from rubbing against the abutting ring 2 during movement, thereby protecting the boss 33. A guide surface 21 is provided on the side of the abutting ring 2 close to the valve cover 31, and the end of the guide surface 21 close to the boss 33 is higher than the end of the guide surface 21 away from the boss 33. The guide surface 21 guides the flow of gas, facilitating the gas to flow from the connecting channel 13 to the gas outlet channel 12. A guide rod 34 is provided on the end of the boss 33 away from the valve stem 3, and a guide groove 14 is provided on the valve body 1 for slidingly cooperating with the guide rod 34, and the connecting channel 13 is connected to the guide groove 14.

[0037] Combination Figure 2 and Figure 4 As shown, the valve body 1 is connected with a driving assembly 4 for driving the valve cover 31 to slide in a direction close to or away from the abutment ring 2. The driving assembly 4 includes a mounting body 41 connected to the valve body 1, a piston 42 fixedly connected to the end of the valve stem 3 away from the boss 33, and a plurality of elastic structures 43 connected to the piston 42. The mounting body 41 includes a mounting shell 411 fixedly connected to the valve body 1, a plurality of limiting rods 412 fixedly connected to the mounting shell 411, a sealing membrane 413 fixedly connected to the mounting shell 411, a mounting cover 414 slidably connected to the limiting rod 412, and a limiting block 415 threadedly connected to each limiting rod 412. The valve stem 3 is slidably connected to the mounting shell 411, the stopper 415 is in contact with the mounting cover 414, the mounting cover 414 is located between the stopper 415 and the mounting shell 411, the end of the sealing film 413 away from the mounting shell 411 is fixedly connected to the mounting cover 414, the sealing film 413 surrounds the piston 42, the sealing film 413, the mounting shell 411 and the mounting cover 414 form a mounting cavity 416, and the outer peripheral surface of the piston 42 fits the inner ring of the sealing film 413. Two O-rings and two OE rings are fixedly connected to the outer peripheral surface of the piston 42, the O-rings correspond to the OE rings one by one, the OE rings surround the O-rings, and the OE rings fit the inner ring of the sealing film 413.

[0038] Combination Figure 1 , Figure 2 and Figure 4 As shown, the elastic structure 43 includes an outer spring 431 and an inner spring 432 connected to the installation cavity 416. The outer spring 431 is sleeved on the inner spring 432. One end of the outer spring 431 abuts against the installation shell 411, and the other end abuts against the piston 42; one end of the inner spring 432 abuts against the installation shell 411, and the other end abuts against the piston 42. A plurality of protrusions 421 are provided on the side of the piston 42 close to the installation cover 414. The boss 33 is integrally formed with the piston 42. The elastic structure 43 corresponds to the boss 33 one by one. The boss 33 is provided with a groove 422 for one end of the inner spring 432 to be inserted. The outer spring 431 surrounds the protrusion 421. A flat-head muffler 4141 and an active rod 4142 are fixedly connected to the side of the installation cover 414 away from the piston 42. The end of the active rod 4142 away from the installation cover 414 is connected to a handle 4143. The mounting shell 411 is provided with an air hole 4111 , which is communicated with the mounting cavity 416 . The air hole 4111 faces the piston 42 , and an air outlet of the air hole 4111 is located between the piston 42 and the valve body 1 .

[0039] Combination Figure 2 and Figure 5 As shown, the mounting shell 411 is provided with a mounting groove 4112, in which the lower retaining ring 6, the middle washer 7 and the upper retaining ring 8 are installed, and the lower retaining ring 6, the middle washer 7 and the upper retaining ring 8 can all be elastically deformed, so that the lower retaining ring 6, the middle washer 7 and the upper retaining ring 8 can be conveniently installed in the mounting groove 4112, the mounting shell 411 is threadedly connected with the middle block 5, the middle block 5 abuts against the upper retaining ring 8, the valve stem 3 passes through the middle block 5, and the valve stem 3 is sleeved with a reset member 51, which is a reset spring, one end of the reset member 51 is fixedly connected to the middle block, and the other end is fixedly connected to the valve stem 3, and the elastic coefficients of the outer spring 431 and the inner spring 432 are both greater than the elastic coefficient of the reset member 51. The end of the reset member 51 away from the middle block 5 abuts against the upper retaining ring 8, and the lower retaining ring 6, the middle washer 7 and the upper retaining ring 8 can all play a role of buffering and sealing.

[0040] The implementation principle of a pneumatic proportional cut-off valve in the embodiment of the present application is: The air hole 4111 is inflated with air through an external air pump, and the air pressure between the piston 42 and the mounting body 41 increases, and the piston 42 slides in a direction away from the abutting ring 2, so that the valve cover 31 is separated from the abutting ring 2. The gas enters the connecting channel 13 through the air inlet channel 11, and the gas in the connecting channel 13 contacts the inclined surface 331 and flows along the inclined direction of the inclined surface 331. The inclined surface 331 guides the flow of the gas, and facilitates the gas in the air inlet channel 11 to flow into the air outlet channel 12 through the connecting channel 13.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pneumatic proportional cut-off valve, characterized in that: The invention comprises a valve body (1), wherein the valve body (1) is provided with an air inlet channel (11), an air outlet channel (12) and a connecting channel (13), wherein the air inlet channel (11) and the air outlet channel (12) are both in communication with the connecting channel (13), wherein the inner wall of the connecting channel (13) is connected with an abutment ring (2), wherein the valve body (1) is slidably connected with a valve stem (3), wherein the valve stem (3) is connected with a valve cover (31), and wherein the valve cover (31) is used for covering the abutment ring (2). The valve body (1) is connected to a driving assembly (4) for driving the valve stem (3) to slide in a direction approaching or away from the abutment ring (2); the valve stem (3) is provided with a boss (33), the boss (33) abuts against the valve cover (31), the boss (33) is located between the valve cover (31) and the air outlet of the air inlet passage (11), and an inclined surface (331) is provided on a side of the boss (33) away from the valve cover (31).

2. The pneumatic proportional cut-off valve according to claim 1, characterized in that: The drive assembly (4) comprises a mounting body (41) connected to the valve body (1), a piston (42) connected to the valve stem (3), and a plurality of elastic structures (43) connected to the piston (42); the valve stem (3) and the mounting body (41) are slidably matched; the mounting body (41) is provided with a mounting cavity (416) for slidably matching with the piston (42); the outer peripheral surface of the piston (42) is in contact with the inner wall of the mounting cavity (416); one end of the elastic structure (43) is in contact with the piston (42), and the other end is in contact with the inner wall of the mounting cavity (416); the mounting body (41) is provided with an air hole (4111), and the air hole (4111) is connected to the mounting cavity (416).

3. The pneumatic proportional cut-off valve according to claim 2, characterized in that: The mounting body (41) is connected to an intermediate block (5), the intermediate block (5) is located between the elastic structure (43) and the valve cover (31), the valve stem (3) passes through the intermediate block (5), the valve stem (3) is sleeved with a reset member (51), one end of the reset member (51) is connected to the valve stem (3), and the other end is connected to the intermediate block (5), and the elastic coefficient of the elastic structure (43) is greater than the elastic coefficient of the reset member (51).

4. The pneumatic proportional cut-off valve according to claim 2, characterized in that: The mounting body (41) comprises a mounting shell (411) connected to the valve body (1), a limiting rod (412) connected to the mounting shell (411), a sealing membrane (413) connected to the mounting shell (411), a mounting cover (414) slidably connected to the limiting rod (412), and a limiting block (415) threadedly connected to the limiting rod (412), wherein the limiting block (415) abuts against the mounting cover (414), and the mounting cover (413) is provided with a sealing film (413) connected to the mounting shell (411). 4) is located between the limit block (415) and the mounting shell (411), the end of the sealing membrane (413) away from the mounting shell (411) is connected to the mounting cover (414), the sealing membrane (413), the mounting shell (411) and the mounting cover (414) enclose the mounting cavity (416), the sealing membrane (413) surrounds the piston (42), and the outer peripheral surface of the piston (42) is in contact with the inner ring of the sealing membrane (413).

5. The pneumatic proportional cut-off valve according to claim 4, characterized in that: The mounting cover (414) is connected to an active rod (4142), and one end of the active rod (4142) away from the mounting cover (414) is connected to a handle (4143).

6. The pneumatic proportional cut-off valve according to claim 4, characterized in that: The mounting cover (414) is connected to a flat-head muffler (4141).

7. The pneumatic proportional cut-off valve according to claim 4, characterized in that: The elastic structure (43) comprises an outer spring (431) and an inner spring (432); the outer spring (431) is sleeved on the inner spring (432); one end of the outer spring (431) abuts against the mounting cover (414), and the other end abuts against the piston (42); one end of the inner spring (432) abuts against the mounting cover (414), and the other end abuts against the piston (42).

8. The pneumatic proportional cut-off valve according to claim 7, characterized in that: The piston (42) is provided with a protrusion (421), the protrusion (421) is provided with a groove (422) for one end of the inner spring (432) to be inserted, and the outer spring (431) surrounds the protrusion (421).

9. The pneumatic proportional cut-off valve according to claim 1, characterized in that: A sealing gasket (32) is connected to a side of the valve cover (31) close to the abutment ring (2), and the abutment ring (2) abuts against the sealing gasket (32).

10. The pneumatic proportional cut-off valve according to claim 1, characterized in that: The boss (33) is provided with a guide rod (34), the valve body (1) is provided with a guide groove (14), the connecting channel (13) is in communication with the guide groove (14), and the guide rod (34) is in sliding engagement with the guide groove (14).

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