Pneumatic push type valve and assembling method thereof

Abstract

The invention provides a pneumatic push type valve and an assembling method thereof.The valve comprises a valve body, a valve plate, a supporting rod, a T-shaped sliding block and a corrugated pipe, the interior of the valve body is of a hollow structure, and the valve plate is installed on the side face of the valve body to be packaged; the supporting rod, the T-shaped sliding block and the corrugated pipe are all located in the valve body, the corrugated pipe and the T-shaped sliding block are sequentially installed in the valve body, two types of holes are formed in the T-shaped sliding block, the supporting rod is embedded in one type of holes, the supporting rod penetrates through the T-shaped sliding block, and the end of the corrugated pipe is embedded in the other type of holes; a hole is formed in the valve plate, and the end of the supporting rod in the T-shaped sliding block is embedded into the hole in the valve plate. By using the valve body, the valve plate, the T-shaped sliding block in the valve body, the corrugated pipe, the supporting rod and other structural parts, the valve can be quickly assembled and disassembled, the assembly precision and the assembly efficiency are effectively improved, and therefore the production efficiency is improved; the number of structural parts of the valve is small, the valve is convenient to disassemble, accessories cannot be damaged during disassembly, the valve can be repeatedly used, and cost is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment control elements and relates to a pneumatic propulsion valve and an assembly method thereof. Background Art

[0002] As a common equipment component in modern industry, valves can be used to change the direction of gas flow, adjust the amount of gas flow, and cut off or connect pipelines in gas systems. At this time, they are also called pneumatic valves. They are widely used in electronics, machinery, semiconductors, medical equipment, petrochemicals and other fields. The working principle of pneumatic valves is to control the opening and closing of equipment by converting compressed gas into mechanical motion through actuators. Because of their good sealing, corrosion resistance, temperature resistance and wear resistance, pneumatic valves can be widely used in vacuum and complex working environments.

[0003] Various existing pneumatic valves are generally driven by cylinders, and the lifting and lowering actions of the valves are completed by designing corresponding air circuits. For example, CN 220118652U discloses a pneumatic vacuum valve, which includes a valve body, a first groove running through both ends is provided inside the valve body, an opening is provided on the side wall of the valve body, a control valve is installed inside the opening, a second groove is provided inside the control valve, a cylinder is mounted on one end of the control valve, a support rod is provided inside the second groove, an elastic component is provided at one end of the support rod, two baffles are provided inside the first groove, and an annular blocking port is provided at one end of the first groove, the baffle is driven into the annular blocking port by the elastic component, and a seal is formed with the annular blocking port through one side of the baffle. This type of vacuum valve is complex to assemble and has a high air circuit failure rate. After the air circuit fails, the vacuum valve becomes invalid, affecting product quality.

[0004] In addition, the valve core and piston of the valve can adopt a spring linkage structure, which also makes the internal structure of the valve more complicated, making assembly and maintenance more difficult. CN 106704619A discloses a pneumatic vacuum valve, including a valve body, the valve body is provided with an air inlet and an air outlet that can be connected to a negative pressure source, the air inlet and the air outlet are connected and form an air extraction channel, the valve body is provided with a switch channel connected to the air extraction channel, the switch channel is provided with a valve core and a piston, the piston is connected to the wall of the switch channel in sliding under gas drive, the valve core is inserted at the end of the piston, a control channel is provided at the intersection of the air extraction channel and the switch channel, the valve core is provided with a switch part, the switch part is at the intersection of the air extraction channel and the switch channel, the switch part controls the channel to be opened or blocked during the sliding process of the valve core, thereby opening or isolating the air inlet and the air outlet, and the valve core is provided with an isolation part that can isolate the piston from the air extraction channel. Due to the complex structure of the pneumatic vacuum valve, it is difficult to disassemble. At the same time, the sludge accumulated in the exhaust channel will restrict the movement of the piston and cause the vacuum valve to be blocked. Therefore, it needs to be disassembled and cleaned frequently, which reduces work efficiency.

[0005] In summary, for the structural design of pneumatic valves, it is necessary to simplify the structure as much as possible to facilitate quick assembly and disassembly, improve assembly efficiency and production efficiency, while not affecting its own function and reducing costs. Summary of the invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a pneumatic propulsion valve and an assembly method thereof. The valve can realize rapid assembly and disassembly of the valve, effectively improve assembly accuracy and efficiency, thereby improving production efficiency, through the use of a valve body and a valve plate as well as structural parts such as a T-shaped slider, a bellows, and a support rod in the valve body. At the same time, the valve has a small number of structural components, which is convenient for disassembly and reuse, and helps to reduce production costs.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] On the one hand, the present invention provides a pneumatic propulsion valve, which includes a valve body, a valve plate, a support rod, a T-shaped slider and a bellows. The interior of the valve body is a hollow structure. The valve plate is located on one side of the valve body and is installed on the side of the valve body for packaging; the support rod, T-shaped slider and bellows are all located in the valve body, and the bellows and T-shaped slider are sequentially installed in the valve body. The bellows is located on the side away from the valve plate. Two types of holes are opened in the T-shaped slider, one type of hole is embedded with a support rod, and the support rod passes through the T-shaped slider, and the other type of hole is embedded with an end of the bellows; holes are also opened on the valve plate, and the ends of the support rod in the T-shaped slider are correspondingly embedded in the holes on the valve plate.

[0009] In the present invention, the selection and assembly of the structural components of the valve need to be as simple and convenient as possible so that it can be easily assembled and disassembled. The present invention takes the valve body and the valve plate as the main body, and is packaged by the valve plate according to the structural design of the bellows, T-shaped slider and support rod inside the valve body. The valve can be assembled and disassembled quickly through the assembly of the above-mentioned structural parts, and has no complex structural parts, high assembly accuracy and assembly efficiency, reduces the time for maintenance, and helps to improve production efficiency; at the same time, the valve is easy to disassemble, and the accessories will not be damaged during disassembly. The accessories can be reused, saving costs.

[0010] The following are preferred technical solutions of the present invention, but are not intended to be limitations of the technical solutions provided by the present invention. Through the following technical solutions, the technical objectives and beneficial effects of the present invention can be better achieved and realized.

[0011] As a preferred technical solution of the present invention, the valve is in the shape of a rectangular parallelepiped as a whole.

[0012] Preferably, the hollow structure in the valve body is a through structure on both sides, and a through hole is left on the outer surface of the other side opposite to the valve plate.

[0013] In the present invention, the hollow structure in the valve body is mainly divided into two parts. The space on the side close to the valve plate is larger for the T-shaped slider to slide, and the space on the side away from the valve plate is smaller, which mainly provides moving space for the bellows. The number of its channels matches the number of bellows, and the size of the through hole arranged at the end of the side away from the valve plate is further smaller than the moving channel of the bellows to prevent the bellows from passing through the valve body and ensure that the travel rod can extend out of the valve body.

[0014] Preferably, the hole on the valve plate corresponding to the support rod is a non-through hole, and the valve plate is also provided with an air inlet and an air exhaust port, and the air inlet and the air exhaust port are through holes.

[0015] In the present invention, among the three holes on the valve plate, the middle hole is not through-hole, and the remaining two holes are through-holes. The middle hole is used to fix the support rod, and the remaining two holes are used for inflation and degassing.

[0016] Preferably, the valve plate is packaged by fastening with screws and metal washers. When the valve plate is packaged, with the support rod positioned, screws and metal washers of matching specifications are used to fasten the four corners of the valve plate.

[0017] As a preferred technical solution of the present invention, the valve further comprises a travel rod, the travel rod passes through a bellows, and the bellows is sleeved on the outside of the travel rod.

[0018] Preferably, the length of the travel rod is greater than the length of the bellows, and both ends of the travel rod extend beyond the bellows, one end of which is embedded in the hole of the T-shaped slider and fixed, and the travel rod moves synchronously with the T-shaped slider.

[0019] In the present invention, the travel rod and the bellows are integrated, and when the bellows is compressed, the front end of the travel rod moves forward and extends out of the valve body; when the bellows rebounds, the front end of the travel rod moves backward and retracts into the valve body. The rear end of the travel rod and the T-shaped slider are fixed by screws to achieve synchronous sliding.

[0020] Preferably, the number of the bellows is at least two, such as two, four or six, etc., and they are symmetrically arranged relative to the center axis of the T-shaped slider.

[0021] Preferably, the shortest length of the bellows in the working state is 50-60% of the length in the non-working state, for example 50%, 52%, 54%, 55%, 56%, 58% or 60%, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0022] In the present invention, the bellows refers to a tubular elastic sensitive element formed by connecting foldable corrugated sheets along the folding and stretching direction, and the material selection thereof includes 304 stainless steel, 316 stainless steel or AM350 stainless steel.

[0023] As a preferred technical solution of the present invention, the longitudinal section of the T-shaped slider faces one side of the corrugated tube, and the longitudinal section is a tubular structure, which is aligned with the hole in the middle position of the transverse section of the T-shaped slider, so that the support rod passes through the T-shaped slider.

[0024] Preferably, the hole on the T-shaped slider corresponding to the travel rod is a positioning hole, and one end of the travel rod is fixed in the positioning hole.

[0025] Preferably, the T-shaped slider and the travel rod are fixed by threaded fixings, preferably screws.

[0026] Preferably, the T-shaped slider slides in the valve body, driving the travel rod to extend or retract into the valve body.

[0027] As a preferred technical solution of the present invention, the valve also includes a sealing ring, which is arranged in the valve body at a position in contact with the T-shaped slider and the bellows, a position in contact with the support rod and the bellows and the T-shaped slider, and a position in contact with the support rod and the valve plate.

[0028] In the present invention, the positions in the valve that need to be sealed mainly include the parts where the components are in contact, so as to ensure the air tightness of the valve.

[0029] Preferably, the sealing ring comprises a rubber sealing ring, the surface of which is coated with grease.

[0030] In the present invention, the valve can be used in vacuum coating equipment, and some system components of the equipment need to be connected or disconnected intermittently, so such a valve is set at this position.

[0031] In another aspect, the present invention provides a method for assembling the above-mentioned pneumatic propulsion valve, the method comprising:

[0032] (1) After heating the valve body, first insert the support rod and then install the bellows into the valve body;

[0033] (2) Install the T-shaped slider into the valve body through the support rod so that the end of the bellows is embedded in the hole of the T-shaped slider and fixed;

[0034] (3) The valve plate is used for packaging, and the bellows and T-type slider are fixed to the valve body to complete the assembly of the valve.

[0035] As a preferred technical solution of the present invention, in step (1), the valve body is heated to 40-60°C, for example, 40°C, 42°C, 45°C, 48°C, 50°C, 52°C, 55°C, 57°C or 60°C, but is not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable, so that the aperture in the valve body is increased to facilitate the embedding of the support rod.

[0036] Preferably, after the heating in step (1), the aperture of the valve body increases by 0.015 to 0.025 mm, for example, 0.015 mm, 0.016 mm, 0.018 mm, 0.02 mm, 0.022 mm, 0.024 mm or 0.025 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0037] Preferably, after the support rod is embedded in step (1), the valve body is air-cooled to reduce the temperature to room temperature before the remaining components are assembled.

[0038] Preferably, when the bellows is installed into the valve body from outside the valve body in step (1), the travel rod is installed at the same time, so that the bellows is nested on the outside of the travel rod.

[0039] As a preferred technical solution of the present invention, the longitudinal section of the T-shaped slider in step (2) faces inward and slides into the valve body through the support rod.

[0040] Preferably, after the T-shaped slider is installed in the valve body, the end of the travel rod outside the bellows is embedded in the positioning holes on both sides of the transverse section of the T-shaped slider.

[0041] Preferably, the travel rod and the T-shaped slider are fixed by a threaded fixing member, preferably a screw.

[0042] In the present invention, after the sealing ring is coated with grease, it is respectively embedded in the valve body, the bellows, the T-shaped slider and other structural parts that contact each other, and is installed in the valve body together with the structural parts.

[0043] As a preferred technical solution of the present invention, when the valve plate is packaged in step (3), the end of the support rod passing through the T-shaped slider is embedded in the hole in the middle of the valve plate.

[0044] Preferably, before the support rod on the T-shaped sliding block is embedded in the hole on the valve plate, a sealing ring is embedded between the two.

[0045] Preferably, the valve plate is packaged by fastening the corners of the valve plate with screws and metal washers.

[0046] As a preferred technical solution of the present invention, the operation process of the valve is as follows: when compressed gas is introduced, the T-shaped slider is forced to slide toward the inside of the valve body, driving the bellows and the stroke rod to move downward, and the bellows is forced to be compressed inward until the T-shaped slider reaches the hollow bottom end of the valve body, at which time the stroke rod passes through the valve body; when the air is pumped out, it moves in the opposite direction, so that the T-shaped slider, bellows and stroke rod return to their original positions, and so on.

[0047] Preferably, when the valve fails, it needs to be disassembled, and the disassembly steps are opposite to the assembly steps, and the valve plate, T-shaped slider, travel rod and bellows are disassembled in sequence.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] (1) The valve of the present invention can realize rapid assembly and disassembly of the valve by using the valve body and valve plate as well as the T-shaped slider, bellows, support rod and other structural parts in the valve body, effectively improving the assembly accuracy and assembly efficiency, thereby improving production efficiency;

[0050] (2) The valve of the present invention has a small number of structural components, which is easy to disassemble. The accessories will not be damaged during disassembly, and the accessories can be reused, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 Schematic diagram of the assembly structure of the pneumatic propulsion valve provided in Example 1 of the present invention;

[0052] Among them, 1-valve body, 2-valve plate, 3-support rod, 4-T-type slider, 5-bellows, 6-travel rod, 7-sealing ring. DETAILED DESCRIPTION

[0053] In order to better illustrate the present invention and facilitate understanding of the technical solution of the present invention, the present invention is further described in detail below. However, the following embodiments are only simple examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0054] The following are typical but non-limiting embodiments of the present invention:

[0055] Embodiment 1:

[0056] This embodiment provides a pneumatic propulsion valve, the assembly structure diagram of the valve is as follows Figure 1 As shown, it includes a valve body 1, a valve plate 2, a support rod 3, a T-shaped slider 4 and a bellows 5. The interior of the valve body 1 is a hollow structure. The valve plate 2 is located on one side of the valve body 1 and is installed on the side of the valve body 1 for packaging; the support rod 3, T-shaped slider 4 and bellows 5 are all located in the valve body 1, and the bellows 5 and T-shaped slider 4 are sequentially installed in the valve body 1, and the bellows 5 is located on the side away from the valve plate 2. Two types of holes are opened in the T-shaped slider 4, one type of hole is embedded in the support rod 3, and the support rod 3 passes through the T-shaped slider 4, and the other type of hole is embedded in the end of the bellows 5; the valve plate 2 is also provided with a hole, and the end of the support rod 3 of the T-shaped slider 4 is correspondingly embedded in the hole on the valve plate 2.

[0057] The valve is in the shape of a rectangular parallelepiped as a whole.

[0058] The hollow structure in the valve body 1 is a through structure on both sides, and a through hole is left on the outer surface of the other side opposite to the valve plate 2.

[0059] The hole on the valve plate 2 corresponding to the support rod 3 is a non-through hole. The valve plate 2 is also provided with an air inlet and an air exhaust port, and the air inlet and the air exhaust port are through holes.

[0060] The valve plate 2 is packaged in such a way that the corners of the valve plate 2 are fastened with screws and metal washers.

[0061] The valve further comprises a travel rod 6 , wherein the travel rod 6 passes through a bellows 5 , and the bellows 5 is sleeved on the outside of the travel rod 6 .

[0062] The length of the travel rod 6 is greater than that of the bellows 5 , and both ends of the travel rod 6 extend beyond the bellows 5 , one end of which is embedded in the hole of the T-shaped slider 4 and fixed, and the travel rod 6 moves synchronously with the T-shaped slider 4 .

[0063] There are two bellows 5 , which are symmetrically arranged relative to the central axis of the T-shaped slider 4 .

[0064] The shortest length of the bellows 5 in the working state accounts for 55.9% of the length in the non-working state.

[0065] The longitudinal section of the T-shaped slider 4 faces one side of the corrugated tube 5 . The longitudinal section is a tubular structure and is aligned with the hole in the middle position of the transverse section of the T-shaped slider 4 , so that the support rod 3 passes through the T-shaped slider 4 .

[0066] The hole on the T-shaped slider 4 corresponding to the travel rod 6 is a positioning hole, and one end of the travel rod 6 is fixed in the positioning hole.

[0067] The T-shaped slide block 4 and the travel rod 6 are fixed by screws.

[0068] The T-shaped slider 4 slides in the valve body 1 , driving the travel rod 6 to extend or retract into the valve body 1 .

[0069] The valve further comprises a sealing ring 7, which is arranged in a position in the valve body 1 in contact with the T-shaped slider 4 and the bellows 5, a position in contact with the support rod 3, the bellows 5 and the T-shaped slider 4, and a position in contact with the support rod 3 and the valve plate 2.

[0070] The sealing ring 7 is a rubber sealing ring, and grease is applied on its surface. The grease is perfluoropolyether lubricating grease.

[0071] Embodiment 2:

[0072] The present embodiment provides a pneumatic propulsion valve, which includes a valve body 1, a valve plate 2, a support rod 3, a T-shaped slider 4 and a bellows 5. The interior of the valve body 1 is a hollow structure, and the valve plate 2 is located on one side of the valve body 1 and is installed on the side of the valve body 1 for packaging; the support rod 3, the T-shaped slider 4 and the bellows 5 are all located in the valve body 1, and the bellows 5 and the T-shaped slider 4 are sequentially installed in the valve body 1, and the bellows 5 is located on the side away from the valve plate 2. Two types of holes are opened in the T-shaped slider 4, one type of hole is embedded in the support rod 3, and the support rod 3 passes through the T-shaped slider 4, and the other type of hole is embedded in the end of the bellows 5; the valve plate 2 is also provided with a hole, and the end of the support rod 3 of the T-shaped slider 4 is correspondingly embedded in the hole on the valve plate 2.

[0073] The valve is in the shape of a rectangular parallelepiped as a whole.

[0074] The hollow structure in the valve body 1 is a through structure on both sides, and a through hole is left on the outer surface of the other side opposite to the valve plate 2.

[0075] The hole on the valve plate 2 corresponding to the support rod 3 is a non-through hole. The valve plate 2 is also provided with an air inlet and an air exhaust port, and the air inlet and the air exhaust port are through holes.

[0076] The valve plate 2 is packaged in such a way that the corners of the valve plate 2 are fastened with screws and metal washers.

[0077] The valve further comprises a travel rod 6 , wherein the travel rod 6 passes through a bellows 5 , and the bellows 5 is sleeved on the outside of the travel rod 6 .

[0078] The length of the travel rod 6 is greater than that of the bellows 5 , and both ends of the travel rod 6 extend beyond the bellows 5 , one end of which is embedded in the hole of the T-shaped slider 4 and fixed, and the travel rod 6 moves synchronously with the T-shaped slider 4 .

[0079] There are four bellows 5 , which are symmetrically arranged relative to the central axis of the T-shaped slider 4 .

[0080] The shortest length of the bellows 5 in the working state accounts for 50.5% of the length in the non-working state.

[0081] The longitudinal section of the T-shaped slider 4 faces one side of the corrugated tube 5 . The longitudinal section is a tubular structure and is aligned with the hole in the middle position of the transverse section of the T-shaped slider 4 , so that the support rod 3 passes through the T-shaped slider 4 .

[0082] The hole on the T-shaped slider 4 corresponding to the travel rod 6 is a positioning hole, and one end of the travel rod 6 is fixed in the positioning hole.

[0083] The T-shaped slide block 4 and the travel rod 6 are fixed by screws.

[0084] The valve further comprises a sealing ring 7, which is arranged in a position in the valve body 1 in contact with the T-shaped slider 4 and the bellows 5, a position in contact with the support rod 3, the bellows 5 and the T-shaped slider 4, and a position in contact with the support rod 3 and the valve plate 2.

[0085] The sealing ring 7 is a rubber sealing ring, and grease is applied on its surface.

[0086] Embodiment 3:

[0087] This embodiment provides an assembly method of a pneumatic propulsion valve, the assembly method comprising the following steps:

[0088] (1) The valve body 1 is heated to 50° C. to increase the aperture of the valve body 1 by 0.02 mm, the support rod 3 is first inserted, the temperature is lowered to room temperature, and then the bellows 5 and the travel rod 6 are installed from the outside of the valve body 1 into the valve body 1, so that the bellows 5 is nested on the outside of the travel rod 6;

[0089] (2) With the longitudinal section of the T-shaped slider 4 facing inward, slide it into the valve body 1 through the support rod 3, so that the ends of the travel rod 6 outside the bellows 5 are embedded in the positioning holes on both sides of the transverse section of the T-shaped slider 4, and fix the travel rod 6 and the T-shaped slider 4 with screws;

[0090] (3) The valve plate 2 is used for packaging. The sealing ring 7 is first embedded in the hole in the middle of the valve plate 2, and then the end of the support rod 3 is embedded in the hole in the middle of the valve plate 2. The valve plate 2 is packaged to fix the bellows 5 and the T-shaped slider 4 to the valve body 1. Finally, the corners of the valve plate 2 are fastened with screws and metal washers to complete the assembly of the valve.

[0091] Embodiment 4:

[0092] This embodiment provides an assembly method of a pneumatic propulsion valve, the assembly method comprising the following steps:

[0093] (1) The valve body 1 is heated to 40° C. to increase the aperture of the valve body 1 by 0.015 mm, the support rod 3 is first inserted, the temperature is lowered to room temperature, and then the bellows 5 and the travel rod 6 are installed from the outside of the valve body 1 into the valve body 1, so that the bellows 5 is nested on the outside of the travel rod 6;

[0094] (2) With the longitudinal section of the T-shaped slider 4 facing inward, slide it into the valve body 1 through the support rod 3, so that the ends of the travel rod 6 outside the bellows 5 are embedded in the positioning holes on both sides of the transverse section of the T-shaped slider 4, and fix the travel rod 6 and the T-shaped slider 4 with screws;

[0095] (3) The valve plate 2 is used for packaging. The sealing ring 7 is first embedded in the hole in the middle of the valve plate 2, and then the end of the support rod 3 is embedded in the hole in the middle of the valve plate 2. The valve plate 2 is packaged to fix the bellows 5 and the T-shaped slider 4 to the valve body 1. Finally, the corners of the valve plate 2 are fastened with screws and metal washers to complete the assembly of the valve.

[0096] Embodiment 5:

[0097] This embodiment provides an assembly method of a pneumatic propulsion valve, the assembly method comprising the following steps:

[0098] (1) The valve body 1 is heated to 60° C. to increase the aperture of the valve body 1 by 0.025 mm, the support rod 3 is first inserted, the temperature is lowered to room temperature, and then the bellows 5 and the travel rod 6 are installed from the outside of the valve body 1 into the valve body 1, so that the bellows 5 is nested on the outside of the travel rod 6;

[0099] (2) With the longitudinal section of the T-shaped slider 4 facing inward, slide it into the valve body 1 through the support rod 3, so that the ends of the travel rod 6 outside the bellows 5 are embedded in the positioning holes on both sides of the transverse section of the T-shaped slider 4, and fix the travel rod 6 and the T-shaped slider 4 with screws;

[0100] (3) The valve plate 2 is used for packaging. The sealing ring 7 is first embedded in the hole in the middle of the valve plate 2, and then the end of the support rod 3 is embedded in the hole in the middle of the valve plate 2. The valve plate 2 is packaged to fix the bellows 5 and the T-shaped slider 4 to the valve body 1. Finally, the corners of the valve plate 2 are fastened with screws and metal washers to complete the assembly of the valve.

[0101] After the pneumatic propulsion valve in the above embodiment is assembled and installed in the pipeline system, its operation process is as follows: when compressed gas is introduced, the T-shaped slider 4 is forced to slide toward the inside of the valve body 1, driving the bellows 5 and the travel rod 6 to move downward, and the bellows 5 is forced to be compressed inward until the T-shaped slider 4 reaches the hollow bottom end of the valve body 1, at which time the travel rod 6 passes through the valve body 1; when the air is pumped out, it moves in the opposite direction, so that the T-shaped slider 4, the bellows 5 and the travel rod 6 return to their original positions, and the reciprocating motion is repeated.

[0102] When the valve fails, it needs to be disassembled. The disassembly steps are opposite to the assembly steps, and the valve plate 2, T-shaped slider 4, travel rod 6 and bellows 5 are disassembled in sequence.

[0103] It can be seen from the above embodiments that the valve of the present invention can realize rapid assembly and disassembly of the valve through the use of the valve body and valve plate as well as structural parts such as T-shaped sliders, bellows, support rods, etc. in the valve body, thereby effectively improving assembly accuracy and assembly efficiency, thereby improving production efficiency; the valve has a small number of structural components and is easy to disassemble, and the accessories will not be damaged during disassembly, and the accessories can be reused, saving costs.

[0104] The applicant declares that the present invention illustrates the detailed products and methods of the present invention through the above embodiments, but the present invention is not limited to the above detailed products and methods, that is, it does not mean that the present invention must rely on the above detailed products and methods to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the product of the present invention, addition of auxiliary structures, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A pneumatic propulsion valve, characterized in that: The valve includes a valve body, a valve plate, a support rod, a T-shaped slider and a bellows. The interior of the valve body is a hollow structure. The valve plate is located on one side of the valve body and is installed on the side of the valve body for packaging. The support rod, T-shaped slider and bellows are all located in the valve body. The bellows and T-shaped slider are sequentially installed in the valve body. The bellows is located on the side away from the valve plate. Two types of holes are opened in the T-shaped slider. The support rod is embedded in one type of hole. The support rod passes through the T-shaped slider, and the end of the bellows is embedded in the other type of hole. Holes are also opened on the valve plate, and the ends of the support rod in the T-shaped slider are correspondingly embedded in the holes on the valve plate.

2. The pneumatically driven valve according to claim 1, characterized in that: The valve is in the shape of a rectangular parallelepiped as a whole; Preferably, the hollow structure in the valve body is a through structure on both sides, and a through hole is left on the outer surface of the other side of the valve plate; Preferably, the hole on the valve plate corresponding to the support rod is a non-through hole, and the valve plate is also provided with an air inlet and an air extraction port, and the air inlet and the air extraction port are through holes; Preferably, the valve plate is packaged by fastening the corners of the valve plate with screws and metal washers.

3. The pneumatically driven valve according to claim 1 or 2, characterized in that: The valve further comprises a travel rod, the travel rod passes through the bellows, and the bellows is sleeved on the outside of the travel rod; Preferably, the length of the travel rod is greater than the length of the bellows, and both ends of the travel rod extend beyond the bellows, one end of which is embedded in the hole of the T-shaped slider and fixed, and the travel rod moves synchronously with the T-shaped slider; Preferably, the number of the bellows is at least two, and they are symmetrically arranged relative to the central axis of the T-shaped slider; Preferably, the shortest length of the bellows in the working state accounts for 50-60% of the length in the non-working state.

4. The pneumatically-driven valve according to any one of claims 1 to 3, characterized in that: The longitudinal section of the T-shaped slider faces one side of the corrugated tube, and the longitudinal section is a tubular structure, which is aligned with the hole in the middle position of the transverse section of the T-shaped slider, so that the support rod passes through the T-shaped slider; Preferably, the hole on the T-shaped slider corresponding to the travel rod is a positioning hole, and one end of the travel rod is fixed in the positioning hole; Preferably, the T-shaped slider and the travel rod are fixed by threaded fixings, preferably screws; Preferably, the T-shaped slider slides in the valve body, driving the travel rod to extend or retract the valve body.

5. The pneumatically-driven valve according to any one of claims 1 to 4, characterized in that: The valve further comprises a sealing ring, which is arranged in the valve body at a position in contact with the T-shaped slider and the bellows, at a position in contact with the support rod, the bellows and the T-shaped slider, and at a position in contact with the support rod and the valve plate; Preferably, the sealing ring comprises a rubber sealing ring, the surface of which is coated with grease.

6. The method for assembling a pneumatic propulsion valve according to any one of claims 1 to 5, characterized in that: The assembly method comprises the following steps: (1) After heating the valve body, first insert the support rod and then install the bellows into the valve body; (2) Install the T-shaped slider into the valve body through the support rod so that the end of the bellows is embedded in the hole of the T-shaped slider and fixed; (3) The valve plate is used for packaging, and the bellows and T-type slider are fixed to the valve body to complete the assembly of the valve.

7. The assembly method according to claim 6, characterized in that: The valve body in step (1) is heated to 40-60° C. to increase the aperture of the valve body to facilitate embedding of the support rod; Preferably, after the heating in step (1), the aperture of the valve body increases by 0.015 to 0.025 mm; Preferably, after the support rod is embedded in step (1), the valve body is air-cooled to reduce the temperature to room temperature before assembling the remaining components; Preferably, when the bellows is installed into the valve body from outside the valve body in step (1), the travel rod is installed at the same time, so that the bellows is nested on the outside of the travel rod.

8. The assembly method according to claim 6 or 7, characterized in that: In step (2), the longitudinal section of the T-shaped slider faces inward and slides into the valve body through the support rod; Preferably, after the T-shaped slider is installed in the valve body, the end of the travel rod outside the bellows is embedded in the positioning holes on both sides of the transverse section of the T-shaped slider; Preferably, the travel rod and the T-shaped slider are fixed by threaded fixings, preferably screws.

9. The assembly method according to any one of claims 6 to 8, characterized in that: When the valve plate is packaged in step (3), the end of the support rod passing through the T-shaped slider is embedded in the hole in the middle of the valve plate; Preferably, before the support rod on the T-shaped slider is embedded into the hole on the valve plate, a sealing ring is embedded between the two; Preferably, the valve plate is packaged by fastening the corners of the valve plate with screws and metal washers.

10. The assembly method according to any one of claims 6 to 9, characterized in that: The operation process of the valve is as follows: when compressed gas is introduced, the T-shaped slider is forced to slide toward the inside of the valve body, driving the bellows and the travel rod to move downward, and the bellows is forced to be compressed inward until the T-shaped slider reaches the hollow bottom end of the valve body, at which time the travel rod passes through the valve body; when the gas is exhausted, it moves in the opposite direction, so that the T-shaped slider, the bellows and the travel rod return to their original positions, and the reciprocating motion is repeated in this way; Preferably, when the valve fails, it needs to be disassembled, and the disassembly steps are opposite to the assembly steps, and the valve plate, T-shaped slider, travel rod and bellows are disassembled in sequence.

Images