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, in particular to a pneumatic proportional cut-off valve. BACKGROUND

[0002] A valve is a device used to control the flow of fluids (liquids, gases, vapors, etc.). It regulates the flow, pressure, and direction of fluids by changing the size of the passageway or opening inside the valve. Valves are widely used in various industrial and civilian 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, which includes 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 piece arranged on the valve stem, and a butt joint pipe connected to the valve body and having a flow channel. The flow channel is provided with an elastic inner tube, and the two ends of the inner tube extend to the two ends of the butt joint pipe, respectively. The outer wall of the butt joint pipe is fixedly provided with a mounting seat having an inner cavity, and the inner cavity communicates with the flow channel. An adjusting top rod reciprocating towards the inner tube is slidably arranged in the inner cavity. The outer wall of the mounting seat is provided with a control port communicating with the inner cavity. A transmission member is arranged in the inner cavity. The position of the inner cavity wall close to the control port is provided with a locking assembly limiting the action of the transmission member. The transmission member reciprocates between the locking assembly and the adjusting top rod. An elastic abutting assembly protruding from the control port is arranged in the inner cavity, which drives the adjusting top rod and the transmission member to always link the transmission member and drive the transmission member to move towards the locking assembly, so that the transmission member and the locking assembly form a locking fit. A control assembly and a trigger member are arranged outside the mounting seat, which control the action of the transmission member and trigger the transmission member to move away from the locking assembly. The control assembly moves with the trigger member.

[0004] The valve with a flow regulating mechanism has simple structure, high safety factor and better durability. However, the valve with a flow regulating mechanism has some shortcomings, such as when the opening and closing piece is in the open state, the gas at the inlet of the valve body will flow into the groove of the opening and closing piece, 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. Practical new type content

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

[0006] The application provides a kind of pneumatic proportional cut-off valve using the following technical solutions: including valve body, the valve body is provided with inlet passage, outlet passage and connecting passage, the inlet passage and the outlet passage are communicated with the connecting passage, the inner wall of the connecting passage is connected with abutment ring, the valve body is slidably connected with valve stem, the valve stem is connected with valve cover, the valve cover is used to cover the opening of the abutment ring, the valve body is connected with driving assembly for driving the valve stem to slide towards the direction close to or away from the abutment ring, the valve stem is provided with boss, the boss is in abutment with the valve cover, the boss is located between the valve cover and the outlet of the inlet passage, and the side of the boss away from the valve cover is provided with inclined surface.

[0007] By adopting the above technical scheme, 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 passage through the inlet passage, and the gas in the connecting passage contacts the inclined surface and flows along the inclined direction of the inclined surface. The inclined surface plays a guiding role for the flow of the gas, which facilitates the gas in the inlet passage to flow into the outlet passage through the connecting passage.

[0008] Optionally, the driving 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 is in sliding cooperation with the mounting body, the mounting body is provided with a mounting cavity for sliding cooperation with the piston, the outer periphery of the piston is in contact with the inner wall of the mounting cavity, one end of the elastic structure is in abutment with the piston, and the other end is in abutment with the inner wall of the mounting cavity, the mounting body is provided with a gas hole, and the gas hole is in communication with the mounting cavity.

[0009] By adopting the above technical scheme, the gas hole is inflated by the external air pump, the gas pressure between the piston and the mounting body increases, the piston slides away from the abutment ring, and the elastic structure is elastically deformed and tends to elastically reset. During the movement of the piston, the valve cover is separated from the abutment ring, and the gas in the connecting passage flows into the outlet passage 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 passage to the outlet passage, which facilitates the adjustment of the size of the gas flow in the valve body.

[0010] Optionally, the mounting body is connected with an intermediate block, the intermediate block is located between the elastic structure and the valve cover, the valve stem penetrates through the intermediate block, the valve stem is sleeved with a reset member, one end of the reset member is connected with the valve stem, and the other end is connected with 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 technical scheme, when the gas hole is filled with gas, the valve rod and the piston move away from the abutting ring, and the elastic structure and the reset member are pressed to produce elastic deformation and maintain the tendency of elastic reset; when the gas in the installation cavity is extracted through the gas hole, the elastic structure and the reset member are elastically reset, and since the elastic coefficient of the elastic structure is greater than that of the reset member, the elastic structure is elastically reset slower, and the reset member is elastically reset faster, so that the reset member improves the reset efficiency of the valve cover.

[0012] Optionally, the mounting body comprises a mounting shell connected to the valve body, a limiting rod connected to the mounting shell, a sealing film connected to the mounting shell, a mounting cover slidingly 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, one end of the sealing film away from the mounting shell is connected to the mounting cover, the sealing film, the mounting shell, and the mounting cover enclose the installation cavity, the sealing film surrounds the piston, and the outer circumferential surface of the piston is attached to the inner ring of the sealing film.

[0013] By adopting the technical scheme, when the distance between the mounting shell and the mounting cover is adjusted, the mounting cover is pressed in the direction close to the mounting shell, the elastic structure is pressed to produce elastic deformation and maintain the tendency of elastic reset, when the mounting cover moves to the corresponding position, the limiting block is rotated to abut against the mounting cover, and the limiting block limits the movement of the mounting cover. The elastic structure exerts force on the piston, and a larger gas pressure is required in the connecting channel to move the valve cover, thereby improving the sealing performance between the valve cover and the abutting ring.

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

[0015] By adopting the technical scheme, the handle facilitates the movement of the mounting cover in the direction close to or away from the mounting shell.

[0016] Optionally, the mounting cover is connected with a flat head silencer.

[0017] By adopting the technical scheme, the flat head silencer reduces noise through interference and reflection of sound waves.

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

[0019] By adopting the technical scheme, the inner spring is sleeved in the outer spring, which not only reduces the volume occupied, but also improves the damping 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 clamped into, and the outer spring surrounds the protrusion.

[0021] By adopting the technical scheme, the outer surface of the inner spring is attached to the inner wall of the groove, the inner wall of the groove limits the movement of the inner spring, and the stability of the inner spring being pressed is improved. The inner periphery of the outer spring is attached to the outer surface of the protrusion, the protrusion limits the movement of the outer spring, and the stability of the outer spring being pressed is improved.

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

[0023] By adopting the technical scheme, when the sealing gasket abuts against the abutting ring, the sealing gasket is elastically deformed, the sealing gasket seals the gap between the abutting ring and the valve cover, the gas passing through the gap between the abutting ring and the valve cover is reduced, and the air tightness is improved.

[0024] Optionally, the protrusion is provided with a guide rod, the valve body is provided with a guide groove, the connecting channel is in communication with the guide groove, and the guide rod is in sliding fit with the guide groove.

[0025] By adopting the technical scheme, when the protrusion slides, the guide rod and the guide groove are in sliding fit, the sliding of the guide rod is guided and limited, the stability of the sliding of the valve cover is improved, and the abutting effect of the valve cover and the abutting ring is improved.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The gas enters the connecting channel through the gas 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, and the gas in the gas inlet channel flows into the gas outlet channel through the connecting channel.

[0028] 2. When the gas is filled into the gas hole, the valve rod and the piston move away from the abutting ring, and the elastic structure and the reset member are elastically deformed and have a tendency to be elastically reset; when the gas in the installation cavity is extracted through the gas hole, the elastic structure and the reset member are elastically reset, and since the elastic coefficient of the elastic structure is greater than that of the reset member, the elastic structure is elastically reset slower, the reset member is elastically reset faster, and the reset member improves the reset efficiency of the valve cover. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is an exploded view of the embodiment of the present application.

[0030] Figure 2 is a sectional view of the embodiment of the present application.

[0031] Figure 3 is Figure 2 an enlarged view of the A region of

[0032] Figure 4 is Figure 2 an enlarged view of the B region of

[0033] Figure 5 is Figure 2 an enlarged view of the C region of

[0034] BRIEF DESCRIPTION OF DRAWINGS 1, valve body; 11, air inlet channel; 12, air outlet channel; 13, connecting channel; 14, guide groove; 2, abutting ring; 21, guide surface; 3, valve rod; 31, valve cover; 32, sealing gasket; 33, boss; 331, inclined surface; 34, guide rod; 4, driving assembly; 41, mounting body; 411, mounting shell; 4111, air hole; 4112, mounting groove; 412, limiting rod; 413, sealing film; 414, mounting cover; 4141, flat head silencer; 4142, driving rod; 4143, handle; 415, limiting block; 416, mounting cavity; 42, piston; 421, protruding block; 422, recess; 43, elastic structure; 431, outer spring; 432, inner spring; 5, middle block; 51, reset member; 6, lower retaining ring; 7, middle gasket; 8, upper retaining ring. DETAILED DESCRIPTION

[0035] The following description will be made in conjunction with the accompanying drawings. Figure 1 - the accompanying drawings Figure 5 The application is described in further detail below.

[0036] The embodiments of the present application disclose a pneumatic proportional cut-off valve.

[0037] In conjunction with Figure 1 , Figure 2 and Figure 3As shown, the valve body 1 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 communicated with 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 with the valve body 1 through a plurality of bolts. The valve body 1 is slidably connected with a valve rod 3, the valve rod 3 is fixedly connected with a valve cover 31, the valve cover 31 can cover the opening of the abutting ring 2, and the side of the valve cover 31 close to the abutting ring 2 is fixedly connected with a sealing gasket 32. 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 rod 3 is provided with a boss 33, the boss 33 is integrally formed with the valve rod 3, the boss 33 abuts against the valve cover 31, the side of the boss 33 away from the valve cover 31 is provided with an inclined surface 331, 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 and to protect the boss 33. The side of the abutting ring 2 close to the valve cover 31 is provided with a guide surface 21, 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, and the guide surface 21 guides the flow of gas to facilitate the flow of gas from the connecting channel 13 to the air outlet channel 12. The end of the boss 33 away from the valve rod 3 is provided with a guide rod 34, and the valve body 1 is provided with a guide groove 14 for slidably cooperating with the guide rod 34, and the connecting channel 13 is communicated with the guide groove 14.

[0038] In 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 towards or away from the abutting ring 2, and 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 rod 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 film 413 fixedly connected to the mounting shell 411, a mounting cover 414 slidably connected to the limiting rods 412, and a limiting block 415 threadedly connected to each limiting rod 412. The valve rod 3 is slidably connected with the mounting shell 411, the limiting block 415 abuts against the mounting cover 414, the mounting cover 414 is located between the limiting block 415 and the mounting shell 411, the end of the sealing film 413 away from the mounting shell 411 is fixedly connected with 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 an installation cavity 416, and the outer periphery of the piston 42 is in close contact with the inner ring of the sealing film 413. The outer periphery of the piston 42 is fixedly connected with two O-rings and two OE-rings, the O-rings and the OE-rings are one-to-one corresponding, the OE-rings surround the O-rings, and the OE-rings are in close contact with the inner ring of the sealing film 413.

[0039] In combination Figure 1 , Figure 2 andFigure 4 As shown, the elastic structure 43 comprises an outer spring 431 and an inner spring 432 connected in the mounting cavity 416, the outer spring 431 is sleeved on the inner spring 432, one end of the outer spring 431 abuts against the mounting shell 411, and the other end abuts against the piston 42; one end of the inner spring 432 abuts against the mounting shell 411, and the other end abuts against the piston 42. The piston 42 is provided with a plurality of bosses 421 on the side close to the mounting 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 clamping one end of the inner spring 432, and the outer spring 431 surrounds the boss 421. The mounting cover 414 is fixedly connected with a flat head silencer 4141 and a driving rod 4142 on the side away from the piston 42, and the driving rod 4142 is connected with a handle 4143 at the end away from the mounting cover 414. The mounting shell 411 is provided with an air hole 4111, the air hole 4111 communicates with the mounting cavity 416, the air hole 4111 faces the piston 42, and the gas outlet of the air hole 4111 is located between the piston 42 and the valve body 1.

[0040] In combination Figure 2 And Figure 5 As shown, the mounting shell 411 is provided with a mounting groove 4112, and the lower retainer ring 6, the middle gasket 7 and the upper retainer ring 8 are installed in the mounting groove 4112, the lower retainer ring 6, the middle gasket 7 and the upper retainer ring 8 can all be elastically deformed, so that the lower retainer ring 6, the middle gasket 7 and the upper retainer 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 retainer ring 8, the valve rod 3 penetrates through the middle block 5, the valve rod 3 is sleeved with a reset member 51, the reset member 51 is a reset spring, one end of the reset member 51 is fixedly connected with the middle block, and the other end is fixedly connected with the valve rod 3, and the elastic coefficients of the outer spring 431 and the inner spring 432 are all 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 retainer ring 8, and the lower retainer ring 6, the middle gasket 7 and the upper retainer ring 8 can all play the roles of buffering and sealing.

[0041] The implementation principle of the pneumatic proportional cut-off valve in the embodiment of the application is as follows:

[0042] The air pump is connected outside to fill air into the air hole 4111, the air pressure between the piston 42 and the mounting body 41 becomes larger, the piston 42 slides 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, 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 plays a guiding role on the flow of the gas, so that the gas in the air inlet channel 11 flows into the air outlet channel 12 through the connecting channel 13.

[0043] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A pneumatic proportional cut-off valve characterized by: The utility model provides a valve, including valve body (1), valve body (1) is provided with air inlet channel (11), air outlet channel (12) and connecting channel (13), air inlet channel (11) and air outlet channel (12) all communicate with connecting channel (13), the inner wall of connecting channel (13) is connected with abutment ring (2), valve body (1) slip connection has valve stem (3), valve stem (3) is connected with valve cover (31), valve cover (31) is used to cover the opening of abutment ring (2), valve body (1) is connected for driving assembly (4) for driving valve stem (3) to the direction of close or far from abutment ring (2) slip, valve stem (3) is provided with boss (33), boss (33) is in abutment with valve cover (31), boss (33) is between valve cover (31) and the air outlet of air inlet channel (11), the side away from valve cover (31) of boss (33) is provided with inclined plane (331).

2. The pneumatic proportional cut valve of claim 1, wherein: The utility model provides a valve, including valve body (1), valve body (1) is provided with air inlet channel (11), air outlet channel (12) and connecting channel (13), air inlet channel (11) and air outlet channel (12) all communicate with connecting channel (13), the inner wall of connecting channel (13) is connected with abutment ring (2), valve body (1) slip connection has valve stem (3), valve stem (3) is connected with valve cover (31), valve cover (31) is used to cover the opening of abutment ring (2), valve body (1) is connected for driving assembly (4) for driving valve stem (3) to the direction of close or far from abutment ring (2) slip, valve stem (3) is provided with boss (33), boss (33) is in abutment with valve cover (31), boss (33) is between valve cover (31) and the air outlet of air inlet channel (11), the side away from valve cover (31) of boss (33) is provided with inclined plane (331).

3. The pneumatic proportional cut valve of claim 2, wherein: The utility model provides a valve, including valve body (1), valve body (1) is provided with air inlet channel (11), air outlet channel (12) and connecting channel (13), air inlet channel (11) and air outlet channel (12) all communicate with connecting channel (13), the inner wall of connecting channel (13) is connected with abutment ring (2), valve body (1) slip connection has valve stem (3), valve stem (3) is connected with valve cover (31), valve cover (31) is used to cover the opening of abutment ring (2), valve body (1) is connected for driving assembly (4) for driving valve stem (3) to the direction of close or far from abutment ring (2) slip, valve stem (3) is provided with boss (33), boss (33) is in abutment with valve cover (31), boss (33) is between valve cover (31) and the air outlet of air inlet channel (11), the side away from valve cover (31) of boss (33) is provided with inclined plane (331).

4. The pneumatic proportional cut valve of claim 2, wherein: 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 film (413) connected to the mounting shell (411), a mounting cover (414) slidingly connected to the limiting rod (412), and a limiting block (415) screwedly connected to the limiting rod (412), the limiting block (415) abutting against the mounting cover (414), the mounting cover (414) being located between the limiting block (415) and the mounting shell (411), one end of the sealing film (413) away from the mounting shell (411) being connected to the mounting cover (414), the sealing film (413), the mounting shell (411) and the mounting cover (414) enclosing the mounting cavity (416), the sealing film (413) surrounding the piston (42), and the outer circumferential surface of the piston (42) abutting against the inner ring of the sealing film (413).

5. The pneumatic proportional cut valve of claim 4, wherein: The mounting cover (414) is connected with a driving rod (4142), and one end of the driving rod (4142) away from the mounting cover (414) is connected with a handle (4143).

6. The pneumatic proportional cut valve of claim 4, wherein: The mounting cover (414) is connected with a flat-head silencer (4141).

7. The pneumatic proportional cut valve of claim 4, wherein: The elastic structure (43) comprises an outer spring (431) and an inner spring (432), the outer spring (431) being sleeved on the inner spring (432), one end of the outer spring (431) abutting against the mounting cover (414), the other end abutting against the piston (42), one end of the inner spring (432) abutting against the mounting cover (414), and the other end abutting against the piston (42).

8. The pneumatic proportional cut valve of claim 7, wherein: The piston (42) is provided with a protrusion (421), the protrusion (421) being provided with a groove (422) for clamping one end of the inner spring (432), and the outer spring (431) surrounds the protrusion (421).

9. The pneumatic proportional cut valve of claim 1, wherein: The valve cover (31) is connected with a sealing gasket (32) on the side close to the abutting ring (2), and the abutting ring (2) abuts against the sealing gasket (32).

10. The pneumatic proportional cut valve of claim 1, wherein: 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) communicates with the guide groove (14), and the guide rod (34) slidingly cooperates with the guide groove (14).

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