Pneumatic corrugated pipe valve with support

Abstract

The invention belongs to the technical field of valves, and particularly relates to a pneumatic corrugated pipe valve with a support, which comprises a valve body, a connector, a valve core, a valve rod and a pneumatic assembly, the upper part of the valve body is connected with a screwed joint, a valve cavity is formed in the valve body and extends to the screwed joint, a positioning cavity is formed in the lower side of the valve cavity, and the pneumatic assembly is arranged in the positioning cavity. The connectors are integrally formed in the two opposite side walls of the valve body, and the connectors on the two sides communicate with the positioning cavity and the valve cavity correspondingly. The valve element is connected into the valve cavity in a sliding mode, a sealing cover is connected to the upper portion of the threaded connector in a threaded mode, and the valve rod penetrates through the sealing cover in a sliding mode and extends into the valve cavity. According to the scheme, the corrugated pipe is arranged in the valve cavity, the corrugated pipe can stretch out and draw back, the corrugated pipe is made of the elastic material and can elastically deform in the side direction, the corrugated pipe can supplement a gap between the corrugated pipe and the valve cavity through elastic deformation under the high-temperature or low-temperature condition, the gap position can be well made up in different use environments, and the service life of the valve is prolonged. And normal use of the valve is ensured.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a pneumatic bellows valve with a support. Background Technology

[0002] A pneumatic valve is a valve that uses compressed air to drive multiple sets of combined pneumatic pistons within an actuator. The compressed air drives these pistons, transmitting force to the valve core, which in turn moves the valve core, thus opening and closing the valve.

[0003] Because valves are used in different environments, such as pipelines where valves are located for transporting high-temperature or low-temperature objects, the valve body and valve core are affected by temperature. Due to the difference in materials between the valve body and valve core, the valve body and valve core also have different deformation due to temperature. This results in gaps between the valve body and valve core, which affects the sealing effect of the valve, causing the transported object to remain or leak out, thus affecting the normal use of the valve. Summary of the Invention

[0004] The purpose of this invention is to provide a pneumatic bellows valve with a support to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pneumatic bellows valve with a support, comprising:

[0006] Valve body, interface, valve core, valve stem, and pneumatic components;

[0007] The upper part of the valve body is connected to a threaded connector, the valve body has a valve cavity inside, and the valve cavity extends to the threaded connector. A positioning cavity is formed on the lower side of the valve cavity. The interface is integrally formed on the opposite side walls of the valve body, and the interface on both sides is connected to the positioning cavity and the valve cavity, respectively.

[0008] The valve core is slidably connected to the valve cavity, the upper part of the threaded joint is screwed with a cover, the valve stem slides through the cover and extends into the valve cavity, and the lower end of the valve stem is connected to the valve core.

[0009] A bellows is fitted onto the lower end of the outer wall of the valve stem. The upper and lower ends of the bellows are respectively supported on the cover and the valve core. The bellows is in contact with the inner wall of the valve cavity.

[0010] The pneumatic assembly is connected to the valve stem and is used to drive the valve stem and valve core to move axially relative to the valve cavity.

[0011] Preferably, the lower surface of the valve core is provided with a positioning post, and the positioning post is matched with the size and position of the positioning cavity.

[0012] Preferably, the valve core has an internal threaded hole, and the lower end of the outer wall of the valve stem has an external thread that matches the internal threaded hole.

[0013] Preferably, a spiked guide cone is provided on the inner side of the internal threaded hole, the lower end of the valve stem is provided as a hollow mounting cavity, and positioning plates are laterally slidably connected to both sides of the hollow mounting cavity. The positioning plates move laterally on the side wall of the valve stem. A support spring is connected between the end of the positioning plate located in the hollow mounting cavity and the inner wall of the hollow mounting cavity. The spiked guide cone is located between the two positioning plates. Corresponding connecting holes are provided between the upper surface of the valve core and the outer end of the positioning plate.

[0014] Preferably, the pneumatic assembly includes a hollow cylinder with an open top and a cylinder cover detachably connected to the opening at the top of the cylinder. A piston plate is slidably connected inside the cylinder. The upper end of the valve stem slidably passes through the lower surface of the cylinder and is connected to the piston plate. The cylinder cover is hollow and convex. A vent hole is provided on the side wall of the convex part of the cylinder cover. A return spring is provided between the interior of the convex part of the cylinder cover and the upper surface of the piston plate. A support frame is connected between the lower side of the cylinder and the cover. The lower side of the support frame is fitted onto the outer wall of the cover, and a clamping nut is screwed onto the upper side of the outer wall of the cover. The clamping nut presses against the support frame. An air inlet and outlet port is provided on the side of the lower surface of the cylinder.

[0015] Preferably, a dustproof rubber sheet is provided inside the vent hole, and the upper part of the dustproof rubber sheet is connected to the upper side of the inner wall of the vent hole by screws. A sealing sleeve is embedded in the lower surface of the cylinder body, and the sealing sleeve is slidably sleeved on the outer wall of the valve stem.

[0016] Preferably, the upper end of the valve stem is connected to a sliding column, the upper part of which penetrates the cylinder head and extends upward to the upper side of the cylinder head.

[0017] Preferably, a rotating sleeve is rotatably sleeved on the upper end of the outer wall of the sliding column, and side rods are connected to both sides of the rotating sleeve. A sliding support rod is connected to the bottom end of the side rod, and a sliding hole matching the sliding support rod is opened on the upper surface of the cylinder head.

[0018] Preferably, elastic support components are symmetrically arranged on both sides of the inner side of the bearing frame. Each elastic support component includes a support plate connected to the inner side wall of the bearing frame. A sliding frame is provided on the upper surface of the support plate. A support strip is slidably connected inside the sliding frame. A tension spring is connected between one end of the support strip and the sliding frame. The lower surface of the other end of the support strip is beveled. An upper trapezoidal disc, a lower trapezoidal disc, and a limiting ring are provided on the outer wall of the valve stem. The upper trapezoidal disc, the lower trapezoidal disc, and the limiting ring are arranged sequentially from top to bottom. The upper trapezoidal disc and the limiting ring are fixedly connected to the outer wall of the valve stem by screws. The lower trapezoidal disc is slidably connected to the outer wall of the valve stem. The upper trapezoidal disc and the lower trapezoidal disc are symmetrically installed. The support strip cooperates with the upper trapezoidal disc and the lower trapezoidal disc.

[0019] Preferably, a tie rod type displacement sensor is connected between the upper surface of the piston plate and the lower surface of the cylinder head.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This design incorporates a bellows within the valve cavity. The bellows is expandable and made of an elastic material, allowing for lateral elastic deformation. Under both high and low temperatures, the bellows can compensate for the gap between itself and the valve cavity through elastic deformation. In different operating environments, it can effectively fill any gaps and ensure the normal operation of the valve. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the cylinder body of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the valve body of the present invention;

[0025] Figure 4 This is a schematic diagram of the elastic support component, upper trapezoidal disk, lower trapezoidal disk, and limiting ring of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the trapezoidal disc rising relative to the elastic support component of the valve stem according to the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the trapezoidal disk supported on the support bar in this invention;

[0028] Figure 7 This is a schematic diagram of the structure of the valve stem of the present invention continuing to rise, with the lower trapezoidal disk rising to the upper side of the support bar;

[0029] Figure 8This is a schematic diagram of the structure of the upper trapezoidal disk and the lower trapezoidal disk descending relative to the elastic support component of the present invention;

[0030] Figure 9 This is a schematic diagram of the valve body, interface, and threaded connector of the present invention;

[0031] Figure 10 This is a schematic diagram of the piston plate of the present invention;

[0032] Figure 11 This is a schematic diagram of the separate valve stem and valve core of the present invention;

[0033] Figure 12 This is a schematic diagram of the internal structure of the hollow mounting cavity in this invention.

[0034] In the diagram: 1. Valve body; 2. Interface; 3. Threaded connector; 4. Cover; 5. Bearing frame; 6. Compression nut; 7. Valve stem; 8. Valve core; 9. Valve cavity; 10. Bellows; 11. Cylinder body; 12. Sealing sleeve; 13. Inlet / outlet port; 14. Piston plate; 15. Cylinder head; 16. Sliding column; 17. Return spring; 18. Vent hole; 19. Dustproof rubber sheet; 20. Rotating sleeve; 21. Side rod; 22. Sliding support rod; 23. Pull-rod displacement sensor; 24. Support plate; 25. Sliding frame; 26. Support bar; 27. Tension spring; 28. Upper trapezoidal plate; 29. ​​Lower trapezoidal plate; 30. Limiting ring; 31. Positioning pin; 32. Internal threaded hole; 33. Spiked guide cone; 34. Connecting hole; 35. Positioning plate; 36. Hollow mounting cavity; 37. Support spring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Example 1:

[0038] Please see Figure 1-12The present invention provides a technical solution: a pneumatic bellows valve with a bracket, comprising: a valve body 1, an interface 2, a valve core 8, a valve stem 7, and a pneumatic assembly;

[0039] The valve body 1 is connected to a threaded connector 3 at its upper part. A valve cavity 9 is formed inside the valve body 1 and extends to the threaded connector 3. A positioning cavity is formed on the lower side of the valve cavity 9. An interface 2 is integrally formed on the opposite side walls of the valve body 1. The interfaces 2 on both sides are connected to the positioning cavity and the valve cavity 9, respectively. The valve core 8 is slidably connected to the valve cavity 9. A cover 4 is screwed to the upper part of the threaded connector 3. The valve stem 7 slides through the cover 4 and extends into the valve cavity 9. The lower end of the valve stem 7 is connected to the valve core 8. A bellows 10 is sleeved on the lower end of the outer wall of the valve stem 7. The upper and lower ends of the bellows 10 are supported on the cover 4 and the valve core 8, respectively. The bellows 10 is in contact with the inner wall of the valve cavity 9. The pneumatic component is connected to the valve stem 7 and is used to drive the valve stem 7 and the valve core 8 to move axially relative to the valve cavity 9.

[0040] Analysis of the above content: The valve core 8 is slidably installed in the valve cavity 9 of the valve body 1. The valve core 8 moves up and down with the valve stem 7 driven by the upper pneumatic assembly, such as... Figure 3 As shown, interface 2 on the left is the discharge port, and interface 2 on the right is the feed port.

[0041] When the valve is closed, the material in the right-side port 2 acts directly on the side wall of the valve core 8, and the side wall of the valve core 8 is not easily moved longitudinally due to the pressure, thus keeping the valve closed.

[0042] When the valve is closed, the lower surface of the valve core 8 is sealed and fitted with the lower surface of the valve cavity 9.

[0043] The valve core 8 and valve body 1 are made of 316 stainless steel, which has high wear resistance. The bellows 10 is made of stainless steel or Hastelloy and other high-temperature resistant materials, which can withstand extreme temperatures of approximately -200°C to +600°C (based on the high-temperature resistance parameters of 316 stainless steel in GB / T20878-2020 "Grades and Chemical Compositions of Stainless Steel and Heat-Resistant Steel" and the industry standard ASTM B333 for Hastelloy). It is suitable for high-temperature steam, heat transfer oil and other media environments. The bellows 10 itself is high-temperature resistant and has elastic deformation function. When the valve core 8 and valve body 1 deform due to heat, causing a gap between the valve cavity 9 and valve core 8, the bellows 10 can fit into the gap to compensate for the gap and prevent leakage. The upper and lower ends of the bellows 10 are elastically supported at the valve cavity 9 and the cover 4.

[0044] Example 2:

[0045] Please see Figure 1-12The present invention provides a technical solution based on Embodiment 1: a positioning post 31 is provided on the lower surface of the valve core 8, and the positioning post 31 matches the size and position of the positioning cavity.

[0046] Analysis of the above content: The positioning pin 31 is cylindrical and is integrally formed with the valve core 8. When the valve is closed, that is, when the valve core 8 is located at the bottom of the valve cavity 9, the positioning pin 31 is inserted into the positioning cavity.

[0047] Example 3:

[0048] Please see Figure 1-12 This invention provides a technical solution based on Embodiment 1: The valve core 8 has an internal threaded hole 32, and the lower end of the outer wall of the valve stem 7 has an external thread matching the internal threaded hole 32. A spiked guide cone 33 is provided inside the internal threaded hole 32. The lower end of the valve stem 7 is configured as a hollow mounting cavity 36. Positioning plates 35 are laterally slidably connected to both sides of the hollow mounting cavity 36. The positioning plates 35 move laterally on the side walls of the valve stem 7. A support spring 37 is connected between one end of the positioning plate 35 located inside the hollow mounting cavity 36 and the inner wall of the hollow mounting cavity 36. The spiked guide cone 33 is located between the two positioning plates 35. Corresponding connecting holes 34 are provided between the upper surface of the valve core 8 and the outer end of the positioning plate 35.

[0049] Analysis of the above: The external thread at the lower end of the valve stem 7 matches the internal threaded hole 32. The valve stem 7 inserts into the internal threaded hole 32, and the valve stem 7 and the internal threaded hole 32 are threadedly engaged to achieve a threaded connection. As the valve stem 7 descends, the spiked guide cone 33 rises relative to the valve stem 7. The spiked guide cone 33 gradually inserts into the hollow mounting cavity 36 of the valve stem 7. The spiked guide cone 33 is an inverted cone shape. When the spiked guide cone 33 rises, the spiked end of the spiked guide cone 33 inserts between the two positioning plates 35. As the spiked guide cone 33 rises, the spiked guide... The cone 33 pushes the two positioning plates 35 outward, and the positioning plates 35 extend from the side wall of the valve stem 7. As the spiked guide cone 33 continues to probe in, the positioning plates 35 continue to extend until the connecting hole 34 on the positioning plate 35 corresponds to the connecting hole 34 on the valve core 8. In order to avoid errors, the connecting hole 34 on the positioning plate 35 is set to be elongated, and the inner wall of the connecting hole 34 on the positioning plate 35 is smooth. The inner wall of the connecting hole 34 on the valve core 8 is set with threads. A screw is inserted into the connecting hole 34 on the positioning plate 35 and threadedly connected to the connecting hole 34 on the valve core 8.

[0050] The purpose of the fit between the positioning plate 35, the connecting hole 34, and the screws is to prevent the valve stem 7 from becoming loose between the external thread and the internal thread hole 32.

[0051] After the positioning plate 35 extends, the support spring 37 is in a compressed state. During disassembly, under the elastic force of the support spring 37, the support spring 37 pulls the positioning plate 35 back.

[0052] Example 4:

[0053] Please see Figure 1-12 The present invention provides a technical solution based on Embodiment 1: the pneumatic assembly includes a hollow cylinder 11 with an open top and a cylinder cover 15 detachably connected to the upper opening of the cylinder 11. A piston plate 14 is slidably connected inside the cylinder 11. The upper end of the valve stem 7 slides through the lower surface of the cylinder 11 and is connected to the piston plate 14. The cylinder cover 15 is hollow and convex. A vent hole 18 is provided on the side wall of the convex part of the cylinder cover 15. A return spring 17 is provided between the interior of the convex part of the cylinder cover 15 and the upper surface of the piston plate 14. A support frame 5 is connected between the lower side of the cylinder 11 and the cover 4. The lower side of the support frame 5 is sleeved on the outer wall of the cover 4, and a clamping nut 6 is screwed onto the upper side of the outer wall of the cover 4. The clamping nut 6 presses on the support frame 5. An air inlet / outlet port 13 is provided on the side of the lower surface of the cylinder 11.

[0054] Analysis of the above content: The air inlet and outlet interface 13 is connected to an air pump, pipeline and other corresponding equipment (conventional structure, equipped during use, not shown in the figure). The air pump supplies air to the air inlet and outlet interface 13 and the cylinder 11. Under the action of air intake, the air pressure inside the lower side of the cylinder 11 increases. Under the action of air pressure, the piston plate 14 overcomes the elastic force of the return spring 17 and rises. The piston plate 14 drives the valve core 8 to rise through the valve stem 7, so that the valve chamber 9 opens and the interfaces 2 on both sides are connected.

[0055] The cover 4 seals the upper end of the valve cavity 9, and a sealing ring is set at the connection. A sealing ring is also set at the position where the valve stem 7 passes through the cover 4. The bottom end of the support frame 5 is supported on the cover 4. Then, the bottom end of the support frame 5 is pressed by the threaded engagement of the clamping nut 6 with the cover 4.

[0056] When the air pump deflates, the piston plate 14 descends under the elastic force of the return spring 17. The piston plate 14 pushes the valve stem 7 and valve core 8 to descend, thereby closing the valve chamber 9 and isolating the two interfaces 2 by the valve core 8.

[0057] Example 5:

[0058] Please see Figure 1-12 The present invention provides a technical solution based on embodiment four: a dustproof rubber sheet 19 is provided inside the vent 18, the upper part of the dustproof rubber sheet 19 is connected to the upper side of the inner wall of the vent 18 by screws, and a sealing sleeve 12 is embedded in the lower surface of the cylinder 11, and the sealing sleeve 12 is slidably sleeved on the outer wall of the valve stem 7.

[0059] Analysis of the above content: The dustproof rubber sheet 19 is suspended in the vent hole 18. When the piston plate 14 moves, the air pressure on the upper side of the cylinder 11 changes. The dustproof rubber sheet 19 swings due to the air pressure, which does not affect the normal ventilation function of the vent hole 18. When the valve is stationary (either long-term open or long-term closed), there is no large air pressure. The dustproof rubber sheet 19 blocks the vent hole 18, preventing external dust from entering the cylinder 11 through the vent hole 18.

[0060] Example 6:

[0061] Please see Figure 1-12 The present invention provides a technical solution based on embodiment five: the upper end of the valve stem 7 is connected to a sliding column 16, the upper part of the sliding column 16 penetrates the cylinder head 15 and extends upward to the upper side of the cylinder head 15.

[0062] Analysis of the above content: The slide rod 16 can pass through the cylinder head 15 and slide on the cylinder head 15. When the supply air pressure is insufficient to push the piston plate 14 up to open the valve due to leakage or air pump failure, the slide rod 16 can be manually lifted up, which will drive the valve stem 7 and valve core 8 to lift up and open the valve.

[0063] Example 7:

[0064] Please see Figure 1-12 The present invention provides a technical solution based on embodiment six: a rotating sleeve 20 is rotatably sleeved on the upper end of the outer wall of the sliding column 16, and side rods 21 are connected to both sides of the rotating sleeve 20. A sliding support rod 22 is connected to the bottom end of the side rod 21, and a sliding hole matching the sliding support rod 22 is opened on the upper surface of the cylinder head 15.

[0065] Analysis of the above content: Under normal conditions, the piston plate 14 is driven to move by the air pump, and the sliding support rod 22 slides on the sliding hole. When the air pump or pipeline fails, the piston plate 14 is difficult to reach the required height, resulting in the valve not opening completely and affecting the internal material transmission flow rate.

[0066] This solution involves manually lifting the slide column 16, rotating sleeve 20, and side rod 21 until the sliding support rod 22 is above the upper surface of the cylinder head 15. Then, the rotating sleeve 20, side rod 21, and sliding support rod 22 are rotated so that the sliding support rod 22 is supported on the upper surface of the cylinder head 15. The rotating sleeve 20, side rod 21, sliding support rod 22, and slide column 16 will not descend, keeping the valve in the open position. Sufficient space is provided within the valve chamber 9 for the valve core 8 to move. The rotating sleeve 20 is a bearing, and the side rod 21 is connected to the outer ring of the bearing.

[0067] Example 8:

[0068] Please see Figure 1-12The present invention provides a technical solution based on embodiment four: Elastic support components are symmetrically arranged on both sides of the interior of the bearing frame 5. Each elastic support component includes a support plate 24 connected to the inner sidewall of the bearing frame 5. A sliding frame 25 is provided on the upper surface of the support plate 24. A support strip 26 is slidably connected inside the sliding frame 25. A tension spring 27 is connected between one end of the support strip 26 and the sliding frame 25. The lower surface of the other end of the support strip 26 is set as an inclined plane. An upper trapezoidal disc 28, a lower trapezoidal disc 29, and a limiting ring 30 are provided on the outer wall of the valve stem 7. The upper trapezoidal disc 28, the lower trapezoidal disc 29, and the limiting ring 30 are arranged sequentially from top to bottom. The upper trapezoidal disc 28 and the limiting ring 30 are fixedly connected to the outer wall of the valve stem 7 by screws. The lower trapezoidal disc 29 is slidably connected to the outer wall of the valve stem 7. The upper trapezoidal disc 28 and the lower trapezoidal disc 29 are symmetrically installed. The support strip 26 cooperates with the upper trapezoidal disc 28 and the lower trapezoidal disc 29. A rod-type displacement sensor 23 is connected between the upper surface of the piston plate 14 and the lower surface of the cylinder head 15.

[0069] Analysis of the above content: Currently, pneumatic valves are usually set with a stop point to move the valve stem. Due to problems such as insufficient air pressure or damage to the air pump, the valve stem cannot move to the correct position, resulting in inaccurate opening and closing positions of the valve, and thus, it cannot be fully opened or fully closed.

[0070] A lever-type displacement sensor 23 is set here to detect the position of the piston plate 14. The lever-type displacement sensor 23 is connected to an external PLC controller, and the detected data is output to the PLC controller. The PLC controller determines the position of the piston plate 14 based on the detected data, and presets the position of the piston plate 14 and valve stem 7 to the valve opening or closing position (the valve is closed by the elastic force of the return spring 17, which can usually close completely, and generally only the valve is not fully open). The PLC controller records the detection value of the lever-type displacement sensor 23 when the valve is opening or closing. This detection value is stored in the PLC controller. When the valve is considered not to be fully open (the judgment of not being fully open is preset, for example, the piston plate 14 can only move 80% of the set moving height, which is considered not to be fully open), the PLC controller can output an alarm to remind the user to manually open or close the valve and to inspect the air pump, pipeline, etc.

[0071] The connection and signal transmission between the lever-type displacement sensor 23 and the PLC controller adopt existing technologies.

[0072] When the air pump or pipeline fails, the valve stem 7 is manually driven in a different structural form, which differs from the position restriction of the piston plate 14 and valve stem 7 in Embodiment 7, as detailed below:

[0073] like Figure 5 , 6As shown in Figures 7 and 8, when the valve stem 7 moves upward, it drives the piston plate 14, valve core 8, upper trapezoidal disc 28, lower trapezoidal disc 29, and limit ring 30 to rise until the valve core 8 moves to the upper side of the interface 2, making the valve fully open. At this time, the upper trapezoidal disc 28 pushes the support bar 26 to elastically contract, and the tension spring 27 pushes the support bar 26 to extend. The upper trapezoidal disc 28 is just supported on the support bar 26. The support bar 26 supports the upper trapezoidal disc 28 and will not fall, so the valve can remain open.

[0074] When the valve needs to be closed, the valve stem 7 is continued to rise. The valve stem 7 drives the piston plate 14, valve core 8, upper trapezoidal disc 28, lower trapezoidal disc 29, and limit ring 30 to rise. The lower trapezoidal disc 29 passes over the support bar 26. Then, the upper trapezoidal disc 28 and lower trapezoidal disc 29 are supported by the support bar 26 and make contact. Then, the valve stem 7 is pressed down. The valve stem 7 drives the piston plate 14, valve core 8, upper trapezoidal disc 28, lower trapezoidal disc 29, and limit ring 30 to fall. When the lower trapezoidal disc 29 contacts the support bar 26, the support bar 26 contracts. Because the upper trapezoidal disc 28 and lower trapezoidal disc 29 are symmetrically installed and their outer edges are both beveled (e.g., Figure 5 , 6 As shown in Figures 7 and 8, after the support bar 26 contacts the outer edge of the lower trapezoidal disk 29, it can smoothly transition to the upper trapezoidal disk 28 until the valve core 8 closes the valve chamber 9.

[0075] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A supported pneumatic bellows valve characterized by, Include: Valve body (1), interface (2), valve core (8), valve stem (7) and pneumatic assembly; Wherein, the upper part of the valve body (1) is connected with the threaded joint (3), the inside of the valve body (1) is provided with the valve cavity (9), and the valve cavity (9) extends to the threaded joint (3), the lower side of the valve cavity (9) is provided with the positioning cavity, the interface (2) is integrally formed on the opposite two side walls of the valve body (1), and the interfaces (2) on the two sides are communicated with the positioning cavity and the valve cavity (9) respectively; The valve core (8) is slidably connected in the valve cavity (9), the upper part of the threaded joint (3) is screwed with the cover (4), the valve stem (7) slidably penetrates the cover (4) and extends into the valve cavity (9), and the lower end of the valve stem (7) is connected with the valve core (8); The lower end of the outer wall of the valve stem (7) is sleeved with the bellows (10), the upper and lower ends of the bellows (10) are supported on the cover (4) and the valve core (8) respectively, and the bellows (10) is attached to the inner wall of the valve cavity (9); The pneumatic assembly is connected with the valve stem (7), used for driving the valve stem (7) and the valve core (8) to move axially relative to the valve cavity (9).

2. A pneumatically actuated bellows valve with a carrier according to claim 1, characterized in that: The lower surface of the valve core (8) is provided with a positioning column (31), and the positioning column (31) is matched with the size and position of the positioning cavity.

3. A pneumatically actuated bellows valve with a carrier according to claim 1, characterized in that: The valve core (8) is provided with an internal thread hole (32), and the lower end of the outer wall of the valve stem (7) is provided with an external thread matched with the internal thread hole (32).

4. A pneumatically actuated bellows valve with a carrier according to claim 3, characterized in that: The inner side of the internal thread hole (32) is provided with a sharp guide cone (33), the lower end of the valve stem (7) is provided with a hollow mounting cavity (36), the inner sides of the hollow mounting cavity (36) are both slidably connected with positioning plates (35), the positioning plates (35) move laterally on the side wall of the valve stem (7), one end of the positioning plate (35) located in the hollow mounting cavity (36) is connected with a supporting spring (37) between the hollow mounting cavity (36) and the inner wall of the hollow mounting cavity (36), the sharp guide cone (33) is located between the two positioning plates (35), and the upper surface of the valve core (8) and the outer end of the positioning plate (35) are provided with corresponding connecting holes (34).

5. A pneumatically actuated bellows valve with a carrier according to claim 1, characterized in that: The pneumatic assembly includes a hollow and open upper cylinder body (11), a cylinder cover (15) detachably connected to the upper opening of the cylinder body (11), a piston plate (14) slidably connected inside the cylinder body (11), an upper end of the valve stem (7) slidably penetrating a lower surface of the cylinder body (11) and connected with the piston plate (14), the cylinder cover (15) is hollow and convex upward, the cylinder cover (15) is provided with a vent hole (18) on the side wall of the convex part, a reset spring (17) is arranged between the inner part of the convex part of the cylinder cover (15) and the upper surface of the piston plate (14), a bearing frame (5) is connected between the lower side of the cylinder body (11) and the cover (4), the lower side of the bearing frame (5) is sleeved on the outer wall of the cover (4), the outer wall of the cover (4) is screwed with a compression nut (6), the compression nut (6) is pressed on the bearing frame (5), and the lower surface of the cylinder body (11) is provided with an air inlet and outlet interface (13).

6. A pneumatically actuated bellows valve with a carrier according to claim 5, characterized in that: The inside of the vent hole (18) is provided with a dustproof rubber sheet (19), the upper part of the dustproof rubber sheet (19) is connected with the upper side of the inner wall of the vent hole (18) through a screw, and the lower surface of the cylinder body (11) is embedded with a sealing sliding sleeve (12), and the sealing sliding sleeve (12) is slidingly sleeved on the outer wall of the valve rod (7).

7. A pneumatically actuated bellows valve with a carrier according to claim 5, characterized in that: The upper end of the valve rod (7) is connected with a sliding column (16), the upper part of the sliding column (16) penetrates through the cylinder cover (15) and extends upward to the upper side of the cylinder cover (15).

8. A pneumatically actuated bellows valve with a carrier according to claim 7, characterized in that: The outer wall upper end of the sliding column (16) is rotatably sleeved with a rotating sleeve (20), both sides of the rotating sleeve (20) are connected with side rods (21), the bottom ends of the side rods (21) are connected with sliding support rods (22), and the upper surface of the cylinder cover (15) is provided with sliding holes matched with the sliding support rods (22).

9. A pneumatically actuated bellows valve with a carrier according to claim 5, characterized in that: The inside of the bearing frame (5) is provided with elastic support assemblies symmetrically on both sides, the elastic support assemblies comprise support plates (24) connected with the inner side walls of the bearing frame (5), the upper surfaces of the support plates (24) are provided with sliding clamping frames (25), the sliding clamping frames (25) are slidingly connected with support rods (26), the support rods (26) are connected with the sliding clamping frames (25) through extension springs (27) at one end, the other end of the support rod (26) is provided as an inclined surface on the lower surface, the outer wall of the valve rod (7) is provided with an upper trapezoidal disc (28), a lower trapezoidal disc (29) and a limiting ring (30), the upper trapezoidal disc (28), the lower trapezoidal disc (29) and the limiting ring (30) are sequentially arranged from top to bottom, the upper trapezoidal disc (28) and the limiting ring (30) are fixedly connected with the outer wall of the valve rod (7) through screws, the lower trapezoidal disc (29) is slidingly connected with the outer wall of the valve rod (7), the upper trapezoidal disc (28) and the lower trapezoidal disc (29) are symmetrically installed, and the support rod (26) cooperates with the upper trapezoidal disc (28) and the lower trapezoidal disc (29).

10. A pneumatically actuated bellows valve with a carrier according to claim 9, characterized in that: The upper surface of the piston plate (14) is connected with the lower surface of the cylinder cover (15) through a pull rod type displacement sensor (23).

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