High-maintainability high-frequency pneumatic switch butterfly valve

Abstract

The invention discloses a high-maintainability high-frequency pneumatic switch butterfly valve which comprises a butterfly valve body, a calibration mechanism and a pair of reference mechanisms, and a butterfly valve shaft is rotationally arranged in the butterfly valve body; the alignment mechanism comprises an alignment assembly arranged on the butterfly valve shaft and a protection assembly arranged on the butterfly valve body. The pair of reference mechanisms comprises a reference assembly arranged on one side of the alignment assembly and a buffer assembly arranged on the reference assembly. The alignment assembly comprises an alignment supporting rod, an alignment triggering shaft and an alignment collision block. According to the high-maintainability high-frequency pneumatic switch butterfly valve, after an actuator is replaced, debugging can be carried out under the working conditions that an air forbidden area is achieved, a system is not put into operation, a pipeline is not pressurized or the air source pressure is unstable, a physical positioning reference exists in the adjusting process, judgment of an operator does not need to be completely relied on, and after debugging is completed, physical traces are reserved, so that the debugging efficiency is greatly improved. And debugging can be carried out under typical working conditions such as explosive gas environment, high temperature, high humidity, strong vibration and the like.

Description

Technical Field

[0001] This invention belongs to the field of switch butterfly valve technology, specifically relating to a highly maintainable high-frequency pneumatic switch butterfly valve. Background Technology

[0002] A pneumatic butterfly valve is an automatic control valve composed of a pneumatic actuator and a butterfly valve. It uses compressed air to drive a butterfly plate to rotate 90°, achieving rapid on / off control of fluid flow in pipelines. It is widely used in industrial automation systems. Its core mechanism utilizes compressed air as a power source, converting pneumatic pressure energy into mechanical energy to drive the valve stem and rotate the butterfly plate. The air supply enters the actuator, pushing the piston / diaphragm to move. This movement is converted into valve stem rotation via a gear and rack or fork mechanism, causing the butterfly plate to rotate from perpendicular to the pipeline direction to parallel, allowing fluid flow. When the air supply is reversed or cut off, the piston returns to its original position, and the butterfly plate rotates back to the vertical position, achieving a sealing shut-off.

[0003] Currently, pneumatic butterfly valves are connected to pneumatic actuators via interfaces. When the actuator needs to be replaced due to maintenance or malfunction, in order to ensure that the valve can still achieve reliable sealing at both the fully open and fully closed extreme positions, the actuator's stroke limit needs to be reset. The current common practice is to connect a compressed air source after installing a new actuator, observe the fit between the valve plate and the valve seat through multiple opening and closing operations, and make manual fine adjustments using the limit adjustment screws on the actuator body until the valve plate can stably fit the sealing surface at both extreme positions without visible leakage.

[0004] In actual debugging, this method relies entirely on a stable gas supply and the actual operation of valves. It cannot be implemented in gas-restricted areas, when the system is not in operation, when pipelines are not pressurized, or when the gas supply pressure is unstable. There is no physical positioning reference during the adjustment process. The operator must make a comprehensive decision based on visual judgment of valve plate edge gap, listening to leakage sounds from the sealing surface, and tactile feedback. After debugging, no physical traces are left. In typical working conditions such as explosive gas environment, high temperature, high humidity, and strong vibration, the introduction of auxiliary debugging methods such as external power supply, electronic measuring components, wireless communication modules, or optical transmitting devices all face inherent safety compliance risks, insufficient environmental adaptability, and difficulties in engineering implementation.

[0005] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a highly maintainable high-frequency pneumatic switching butterfly valve.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a highly maintainable high-frequency pneumatic switch butterfly valve, which can solve the problem that after the actuator is replaced, it is impossible to directly confirm whether the valve plate is in the factory-defined fully closed position without air supply and without driving the valve. In the event of valve plate misalignment, there is no physical positioning reference during the adjustment process.

[0008] To achieve the above objectives, a specific embodiment of the present invention provides a highly maintainable high-frequency pneumatic switch butterfly valve, comprising: a butterfly valve body, a calibrating mechanism, and a pair of reference mechanisms. A butterfly valve shaft is rotatably mounted within the butterfly valve body; the calibrating mechanism includes a calibrating component mounted on the butterfly valve shaft and a protective component mounted on the butterfly valve body. The calibrating component rotates with the butterfly valve shaft, and the protective component protects the butterfly valve shaft; the pair of reference mechanisms includes a reference component mounted on one side of the calibrating component and a buffer component mounted on the reference component. The reference component provides a stable physical positioning reference, overcoming limitations imposed by debugging conditions, while the buffer component assists in precise positioning, adapts to valve plate position calibration, buffers impact forces, and protects the calibrating mechanism and the reference mechanisms.

[0009] In one or more embodiments of the present invention, the alignment component includes: an alignment support rod, an alignment trigger shaft, and an alignment stop block. The alignment support rod is disposed on one side of the butterfly valve shaft; the alignment trigger shaft is disposed on the lower side of the alignment support rod; and the alignment stop block is disposed on the outer side of the alignment trigger shaft.

[0010] In one or more embodiments of the present invention, the protection component includes: a protection positioning chamber and a protection follower chamber. The protection positioning chamber is disposed on the upper side of the butterfly valve body; the protection follower chamber is disposed within the protection positioning chamber.

[0011] In one or more embodiments of the present invention, the protective follow-up chamber is fixedly connected to the calibrating support rod, the protective positioning chamber is provided with a torsion groove that matches the calibrating support rod, and protective bearings are provided on both the upper and lower sides of the protective follow-up chamber.

[0012] In one or more embodiments of the present invention, a pair of protective bearings are fixedly connected to a protective positioning chamber and a butterfly valve body, respectively, and both the protective positioning chamber and the butterfly valve body are provided with positioning grooves that match the protective bearings.

[0013] In one or more embodiments of the present invention, the alignment mechanism further includes a positioning component disposed on the upper side of the alignment trigger shaft. The positioning component includes a positioning threaded rod and a positioning threaded cap. The positioning threaded rod is disposed on the upper side of the alignment trigger shaft; the positioning threaded cap is disposed on the outer side of the positioning threaded rod and on the upper side of the alignment support rod.

[0014] In one or more embodiments of the present invention, the positioning threaded rod is fixedly connected to the aligning trigger shaft, the aligning support rod is provided with a displacement groove that matches the positioning threaded rod, and the positioning threaded cap matches the positioning threaded rod.

[0015] In one or more embodiments of the present invention, the reference component includes: a reference positioning block and a reference alignment strip. The reference positioning block is disposed on one side of the alignment component and fixedly connected to the protective positioning chamber; the reference alignment strip is disposed on one side of the reference positioning block.

[0016] In one or more embodiments of the present invention, the buffer assembly includes: a buffer adjusting plate, a buffer threaded rod, a buffer contact plate, a buffer balance rod, and a buffer spring. The buffer adjusting plate is disposed within the reference positioning block; the buffer threaded rod is disposed on the side of the buffer adjusting plate near the reference positioning block and passes through the reference positioning block; the buffer contact plate is disposed on the side of the buffer adjusting plate away from the buffer threaded rod; the buffer balance rod is disposed on the side of the buffer contact plate near the buffer adjusting plate and passes through the buffer adjusting plate; and the buffer spring is sleeved on the buffer balance rod.

[0017] In one or more embodiments of the present invention, the buffer threaded rod is matched with the reference positioning block, a pair of buffer balance rods and buffer springs are provided, and a buffer friction pad is provided on the side of the buffer contact plate away from the buffer adjustment plate.

[0018] Compared with the prior art, the high maintainability high-frequency pneumatic switch butterfly valve of the present invention can be debugged in the case of gas-free zone, system not in operation, pipeline not pressurized or gas source pressure unstable after the actuator is replaced. The adjustment process has a physical positioning reference and does not need to rely entirely on the judgment of the operator. Moreover, after the debugging is completed, physical traces are left. It can be debugged in typical working conditions such as explosive gas environment, high temperature, high humidity and strong vibration. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a highly maintainable high-frequency pneumatic switch butterfly valve in one embodiment of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure at point A in the middle;

[0022] Figure 3 for Figure 1 Schematic diagram of the structure at point B;

[0023] Figure 4 This is a perspective sectional view of a high-maintainability high-frequency pneumatic switch butterfly valve according to an embodiment of the present invention;

[0024] Figure 5 for Figure 4 Schematic diagram of the structure at point C;

[0025] Figure 6 This is a partial three-dimensional view of a highly maintainable high-frequency pneumatic switch butterfly valve according to an embodiment of the present invention;

[0026] Figure 7 This is a perspective view of a highly maintainable high-frequency pneumatic switch butterfly valve according to an embodiment of the present invention.

[0027] Explanation of key figure labels:

[0028] 1-Butterfly valve body, 11-Butterfly valve shaft, 2-Alignment mechanism, 21-Alignment component, 211-Alignment support rod, 212-Alignment trigger shaft, 213-Alignment impact block, 22-Protection component, 221-Protection positioning chamber, 222-Protection follower chamber, 223-Protection bearing, 23-Positioning component, 231-Positioning threaded rod, 232-Positioning threaded cap, 3-Reference mechanism, 31-Reference component, 311-Reference positioning block, 312-Reference alignment bar, 32-Buffer component, 321-Buffer adjusting plate, 322-Buffer threaded rod, 323-Buffer contact plate, 324-Buffer balance bar, 325-Buffer spring, 326-Buffer friction pad. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0030] like Figures 1 to 7As shown, a highly maintainable high-frequency pneumatic switch butterfly valve according to an embodiment of the present invention includes: a butterfly valve body 1, a calibrating mechanism 2, and a pair of reference mechanisms 3. A butterfly valve shaft 11 is rotatably mounted inside the butterfly valve body 1. The calibrating mechanism 2 includes a calibrating component 21 mounted on the butterfly valve shaft 11 and a protective component 22 mounted on the butterfly valve body 1. The calibrating component 21 rotates with the butterfly valve shaft 11, and the protective component 22 protects the butterfly valve shaft 11. The pair of reference mechanisms 3 includes a reference component 31 mounted on one side of the calibrating component 21 and a buffer component 32 mounted on the reference component 31. The reference component 31 provides a stable physical positioning reference, overcoming the limitations of debugging conditions, while the buffer component 32 assists in precise positioning, adapts to valve plate position calibration, buffers impact forces, and protects the calibrating mechanism 2 and the reference mechanisms 3.

[0031] The operation method of this highly maintainable high-frequency pneumatic switch butterfly valve is as follows: Currently, the butterfly valve body 1 is calibrated at the factory to ensure that the valve plate's opening, closing, or shut-off position meets the standard. However, this alone does not provide a visual standard to check whether it is fully closed. With prolonged use, if the butterfly valve body 1 becomes inaccurate, the only reliable method of judgment is by checking for leaks. In this case, the coordination between the calibrating component 21 and the reference mechanism 3 allows for observation of whether the buffer component 32 has been impacted during each maintenance check, and to check for any displacement of the valve plate. Furthermore, even if the buffer component 32 is impacted, its self-buffering properties prevent significant problems. Calibration can be performed using the standard of the reference component 31. After calibration, the calibrating component 21 and the buffer component 32 will be in contact, leaving physical traces. This allows for calibration under typical conditions such as explosive gas environments, high temperatures, high humidity, and strong vibrations, without the need for electronic equipment.

[0032] Additionally, when the actuator needs to be replaced due to maintenance or malfunction, first check whether the aligning component 21 is colliding with the buffer component 32. If the valve plate has not shifted, the actuator can be replaced. If it has shifted, the valve plate can be corrected first to ensure it is fully closed before replacing the actuator. After replacing the actuator, due to the controlled and beneficial axial clearance that must be reserved in the butterfly valve body 1 during the initial design to absorb thermal expansion and contraction, pipeline stress, assembly errors, and vibration impact, the valve plate position needs to be corrected again after the actuator is installed. At this time, due to this axial clearance, the aligning component 21 and the buffer component 32 will most likely no longer be in contact. Since the valve plate is now fully closed, the position of the aligning component 21 can be adjusted using the positioning component 23 to make the aligning component 21 contact the reference component 31, ensuring that the aligning component 21 does not squeeze the reference component 31. This sets a standard for the valve plate position again, indicating that the valve plate position is correct. Subsequent maintenance can still be performed by observing the position of the calibration component 21 to determine the position of the valve plate, which greatly improves the maintainability of the butterfly valve body 1 and allows the butterfly valve body 1 to be adjusted under typical working conditions such as explosive gas environment, high temperature, high humidity, and strong vibration.

[0033] like Figures 1 to 4 As shown, the alignment component 21 includes: an alignment support rod 211, an alignment trigger shaft 212, and an alignment stop 213. The alignment support rod 211 is located on one side of the butterfly valve shaft 11. The alignment support rod 211, through its fixed connection with the butterfly valve shaft 11, allows the movement of the butterfly valve shaft 11 to be promptly fed back to the alignment trigger shaft 212. Specifically, by checking whether the alignment trigger shaft 212 contacts or presses against the buffer assembly 32, it can be determined whether the valve plate inside the butterfly valve body 1 has shifted. The alignment trigger shaft 212 is located below the alignment support rod 211. The alignment trigger shaft 212 positions the alignment stop 213 and protects the alignment stop 213 when it rubs against the buffer assembly 32, allowing the alignment stop 213 to rotate on the alignment trigger shaft 212. The alignment block 213 is located on the outside of the alignment trigger shaft 212. The alignment block 213 can be positioned to show the correct position of the valve plate inside the butterfly valve body 1 by whether it contacts the buffer assembly 32 or squeezes the buffer assembly 32.

[0034] like Figures 1 to 6As shown, the protection component 22 includes a protection positioning chamber 221 and a protection follower chamber 222. The protection positioning chamber 221 is located on the upper side of the butterfly valve body 1. The protection positioning chamber 221 protects the protection follower chamber 222, allowing for smoother rotation of the protection follower chamber 222. The protection follower chamber 222 is located within the protection positioning chamber 221, preventing the butterfly valve shaft 11 from contacting the outside environment and reducing contamination of the butterfly valve shaft 11 by external dust and other impurities.

[0035] like Figures 1 to 5 As shown, the protective follower chamber 222 is fixedly connected to the calibrating support rod 211. Through this fixed connection, the protective follower chamber 222 can rotate synchronously when the calibrating support rod 211 rotates. The protective positioning chamber 221 has a torsion groove that matches the calibrating support rod 211, which facilitates the rotation of the calibrating support rod 211 and provides corresponding space for its rotation. Protective bearings 223 are provided on both the upper and lower sides of the protective follower chamber 222. The protective bearings 223 can reduce the friction between the protective follower chamber 222, the protective positioning chamber 221, and the butterfly valve body 1, thereby reducing the damage to the protective follower chamber 222 caused by friction and improving the rotation accuracy of the calibrating support rod 211.

[0036] like Figures 1 to 2 As shown, a pair of protective bearings 223 are fixedly connected to the protective positioning chamber 221 and the butterfly valve body 1 respectively. The protective positioning chamber 221 and the butterfly valve body 1 are both chiseled with positioning grooves that match the protective bearings 223, which facilitates the installation of the protective bearings 223, improves the stability of the protective bearings 223, and enables the protective bearings 223 to better support the protective follow-up chamber 222.

[0037] like Figures 1 to 4As shown, the alignment mechanism 2 also includes a positioning component 23 disposed on the upper side of the alignment trigger shaft 212. The positioning component 23 includes a positioning threaded rod 231 and a positioning threaded cap 232. The positioning threaded rod 231 is disposed on the upper side of the alignment trigger shaft 212. The positioning threaded rod 231 can position the alignment trigger shaft 212, and can cooperate with the positioning threaded cap 232 to make the alignment trigger shaft 212 fit against the alignment support rod 211, so that the alignment trigger shaft 212 can cooperate with the positioning threaded cap 232 to clamp the alignment support rod 211, thereby fixing the position of the alignment stop 213. By adjusting the position of the alignment stop 213, even if the butterfly valve shaft 11 moves slightly, the standard can be reset. The positioning threaded cap 232 is disposed on the outside of the positioning threaded rod 231 and on the upper side of the alignment support rod 211. The positioning thread cap 232 can be rotated to control the raising and lowering of the alignment trigger shaft 212, allowing the alignment trigger shaft 212 to press against the alignment support rod 211, thereby positioning the alignment impact block 213. The positioning thread rod 231 is fixedly connected to the alignment trigger shaft 212, and the alignment support rod 211 has a displacement groove that matches the positioning thread rod 231. The positioning thread cap 232 matches the positioning thread rod 231.

[0038] like Figures 1 to 6 As shown, the reference component 31 includes a reference positioning block 311 and a reference alignment strip 312. The reference positioning block 311 is disposed on one side of the calibration component 21 and fixedly connected to the protective positioning chamber 221. The reference positioning block 311 can be manufactured at the factory to establish a standard for subsequent use. Calibration can still be performed using the reference positioning block 311. The reference alignment strip 312 is disposed on one side of the reference positioning block 311. The placement of the reference alignment strip 312 provides a conspicuous marking and better positioning for the calibration of the buffer component 32 when adjusting it during use.

[0039] like Figures 1 to 5As shown, the buffer assembly 32 includes: a buffer adjusting plate 321, a buffer threaded rod 322, a buffer contact plate 323, a buffer balance rod 324, and a buffer spring 325. The buffer adjusting plate 321 is disposed within the reference positioning block 311. The position of the buffer adjusting plate 321 can position the buffer threaded rod 322, and the position of the buffer contact plate 323 can be adjusted by adjusting the position of the buffer adjusting plate 321. The buffer threaded rod 322 is disposed on the side of the buffer adjusting plate 321 closest to the reference positioning block 311 and passes through the reference positioning block 311. The user can adjust the position of the buffer adjusting plate 321 by rotating the buffer threaded rod 322. The buffer contact plate 323 is disposed on the side of the buffer adjusting plate 321 away from the buffer threaded rod 322. The buffer balance rod 324 is disposed on the side of the buffer contact plate 323 closest to the buffer adjusting plate 321 and passes through the buffer adjusting plate 321. The buffer spring 325 is sleeved on the buffer balance bar 324, which can provide buffer for the buffer contact plate 323. Even if the aligning block 213 collides with the buffer contact plate 323, it can still protect the reference mechanism 3 and the aligning mechanism 2.

[0040] like Figures 1 to 5 As shown, the buffer threaded rod 322 is matched with the reference positioning block 311. A pair of buffer balance rods 324 and buffer springs 325 are provided. A buffer friction pad 326 is provided on the side of the buffer contact plate 323 away from the buffer adjustment plate 321. The reference positioning block 311 and the buffer friction pad 326 are on the same plane and can be set to a 3° tilt angle. This will prevent false triggering due to excessive angle, making the contact more stable, and will also prevent observability due to insufficient angle.

[0041] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A highly maintainable high-frequency pneumatic switch butterfly valve, characterized in that, include: The butterfly valve body has a butterfly valve shaft rotatably mounted inside it. The alignment mechanism includes an alignment component disposed on the butterfly valve shaft and a protection component disposed on the butterfly valve body. The alignment component is used to rotate with the butterfly valve shaft, and the protection component is used to protect the butterfly valve shaft. A pair of reference mechanisms, including a reference component disposed on one side of the calibrating component and a buffer component disposed on the reference component, wherein the reference component is used to provide a physical positioning reference and the buffer component is used to assist in precise positioning.

2. The highly maintainable high-frequency pneumatic switch butterfly valve according to claim 1, characterized in that, The alignment component includes: A calibrated support rod is installed on one side of the butterfly valve shaft; A calibrating trigger shaft is located on the lower side of the calibrating support rod; The alignment block is located on the outside of the alignment trigger shaft.

3. The highly maintainable high-frequency pneumatic switch butterfly valve according to claim 2, characterized in that, The protection component includes: A protective positioning chamber is provided on the upper side of the butterfly valve body; The protective follow-up compartment is located within the protective positioning compartment.

4. The high maintainability high-frequency pneumatic switch butterfly valve according to claim 3, characterized in that, The protective follow-up chamber is fixedly connected to the calibrating support rod. The protective positioning chamber has a torsion groove that matches the calibrating support rod. Protective bearings are provided on both the upper and lower sides of the protective follow-up chamber.

5. The high maintainability high-frequency pneumatic switch butterfly valve according to claim 4, characterized in that, The pair of protective bearings are fixedly connected to the protective positioning chamber and the butterfly valve body, respectively. The protective positioning chamber and the butterfly valve body are both provided with positioning grooves that match the protective bearings.

6. The highly maintainable high-frequency pneumatic switch butterfly valve according to claim 2, characterized in that, The alignment mechanism further includes a positioning component disposed on the upper side of the alignment trigger shaft, the positioning component comprising: A positioning threaded rod is located on the upper side of the aligning trigger shaft; A positioning thread cap is disposed on the outside of the positioning thread rod and on the upper side of the aligning support rod.

7. The high maintainability high-frequency pneumatic switch butterfly valve according to claim 6, characterized in that, The positioning threaded rod is fixedly connected to the aligning trigger shaft, and the aligning support rod has a displacement groove that matches the positioning threaded rod. The positioning threaded cap matches the positioning threaded rod.

8. The highly maintainable high-frequency pneumatic switch butterfly valve according to claim 3, characterized in that, The reference components include: A reference positioning block is disposed on one side of the alignment component and fixedly connected to the protective positioning chamber; A reference alignment strip is provided on one side of the reference positioning block.

9. The high maintainability high-frequency pneumatic switch butterfly valve according to claim 8, characterized in that, The buffer component includes: A buffer adjustment plate is disposed within the reference positioning block; A buffer threaded rod is provided on the side of the buffer adjustment plate near the reference positioning block and passes through the reference positioning block; A buffer contact plate is disposed on the side of the buffer adjusting plate away from the buffer threaded rod; A buffer balance bar is disposed on the side of the buffer contact plate near the buffer adjustment plate and extends through the buffer adjustment plate; A buffer spring is fitted onto the buffer balance bar.

10. The highly maintainable high-frequency pneumatic switch butterfly valve according to claim 9, characterized in that, The buffer threaded rod is matched with the reference positioning block, and a pair of buffer balance rods and buffer springs are provided. A buffer friction pad is provided on the side of the buffer contact plate away from the buffer adjustment plate.

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