Butterfly valve assembly for treating chemical waste gas

Abstract

The utility model discloses a butterfly valve assembly for treating chemical waste gas, which relates to the technical field of butterfly valves and comprises a valve body, a valve seat is arranged in the valve body, connecting rods are arranged at the upper end and the lower end of the valve seat and are connected with the valve seat through bearings, a hand wheel is rotatably mounted at the top end of the valve body, and the hand wheel is connected with the valve seat through bearings. A shaft at the lower end of the hand wheel is fixedly provided with a valve rod, the valve rod is connected with the valve body through a bearing, the bottom of the valve rod is fixed to the upper connecting rod, a valve clack assembly is installed in the valve seat, the valve clack assembly is of a combined structure, and the valve clack assembly is positioned between the upper connecting rod and the lower connecting rod. And the valve clack of the butterfly valve is easy to damage due to the impact of high-pressure gas.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically a butterfly valve assembly for treating chemical waste gas. Background Technology

[0002] A butterfly valve used for treating chemical waste gas is a type of valve installed on the pipeline of a chemical waste gas treatment system. It mainly consists of a valve body, valve plate, valve stem, and drive device. The valve plate is typically disc-shaped and connected to the drive device via the valve stem. It rotates around an axis to open and close the valve, thereby controlling the flow, cut-off, and flow regulation of chemical waste gas in the pipeline. It features simple structure, small size, light weight, convenient operation, good sealing performance, and low flow resistance coefficient, making it suitable for various operating conditions in the chemical waste gas treatment process.

[0003] For example, the Chinese authorized patent CN216923241U, entitled "A Butterfly Valve," includes a valve body, a bracket fixedly connected to the top of the valve body, a slide rail fixedly connected to the top of the bracket, a slider slidably connected inside the slide rail, a base fixedly connected to the top of the slider, and a control box fixedly connected to the top of the base. This utility model, by setting up a bracket, slide rail, slider, and handle, allows the control box to be used in environments with dense piping when the handle is pulled. The handle moves the control box to the right along the slide rail under the action of the slide rail and slider, thus moving the control box to the outside of the valve body, facilitating the opening of the control box cover.

[0004] While the existing technologies can achieve the flow, cut-off, and regulation of waste gas, if the valve disc is in the cut-off state at the moment of waste gas transportation in the pipeline, a large impact is easily generated. This may affect the cut-off effect or even damage the valve disc. Therefore, it does not meet the current requirements. In response, we propose a butterfly valve assembly for treating chemical waste gas. Utility Model Content

[0005] The purpose of this invention is to provide a butterfly valve assembly for treating chemical waste gas, so as to solve the problem mentioned in the background art that the butterfly valve disc is easily damaged by the impact of high-pressure gas during the instantaneous transport of waste gas in the pipeline.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a butterfly valve assembly for treating chemical waste gas, comprising a valve body, a valve seat disposed inside the valve body, connecting rods disposed at both the upper and lower ends of the valve seat, and the connecting rods being connected to the valve seat via bearings, a handwheel rotatably mounted on the top of the valve body, a valve stem fixedly mounted on the shaft at the lower end of the handwheel, the valve stem being connected to the valve body via bearings, and the bottom of the valve stem being fixed to the upper connecting rod, and a valve disc assembly disposed inside the valve seat, the valve disc assembly being a combined structure, and the valve disc assembly being positioned between the upper and lower connecting rods.

[0007] Preferably, the valve assembly includes a first valve body and a second valve body, and the contact surfaces of the first valve body and the second valve body are provided with rubber liners. The outer side of the first valve body is provided with six annularly distributed bolts, and the inner side of the second valve body is provided with six annularly distributed threaded holes, and the bolts are adapted to the threaded holes.

[0008] Preferably, the upper and lower ends of the first and second petals are provided with connecting blocks with a semi-circular cross-section, a locking block is integrally formed at the middle position of the inner side of the connecting block, and the two sides of the connecting rod are provided with locking grooves, and after the connecting block and the connecting rod are combined, the locking block and the locking groove are engaged.

[0009] Preferably, a first sealing packing is provided between the valve stem and the upper end of the valve body.

[0010] Preferably, buffer tubes are provided on both sides of the valve body, and one end of the buffer tube extends into the limiting groove on the side of the valve body. A buffer spring is installed between the end of the buffer tube and the limiting groove.

[0011] Preferably, the outer wall of the buffer tube is provided with a second sealing filler that fits against the inner wall of the limiting groove.

[0012] Preferably, a pressure sensor is provided at the front end of the valve body, the output end of the pressure sensor is connected to a microcontroller, and an annular warning light strip is provided on the outside of the upper end of the valve body, and the output end of the microcontroller is connected to the annular warning light strip.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model designs the valve disc as a detachable structure. Its main body includes a first disc body and a second disc body. When installing with the connecting rods above and below the valve seat, the connecting blocks at the upper and lower ends of the first and second disc bodies are aligned with the connecting rods, allowing them to close. During the closing process, the locking block inside the connecting block is embedded into the locking groove of the connecting rod, realizing a key connection between the two after merging. This facilitates the valve stem to drive the valve disc assembly to rotate through the connecting rod above. After merging, bolts are used to pass through the first disc body and fix it with the screw hole inside the second disc body, thereby tightly fixing the two disc bodies. When the valve disc suffers wear or damage, there is no need to replace the entire valve disc. Only the bolts fixing the two disc bodies need to be removed to separate the first and second disc bodies, allowing for individual repair or replacement of the damaged parts, effectively reducing maintenance costs. In addition, the detachable valve disc structure also enhances the adaptability of the equipment. Under different chemical waste gas treatment conditions, some disc bodies can be flexibly adjusted or replaced according to actual needs.

[0015] 2. This utility model provides buffer tubes on both sides of the valve body, which slide and engage with the limiting grooves on both sides of the valve body. Under the action of sealing packing, the connection is sealed. When the gas pressure inside the pipeline increases instantaneously, the impact force contacts the valve disc, causing relative displacement between the sliding tube and the valve body, and deforming the buffer spring. This effectively absorbs and alleviates the instantaneous increase in pressure impact, reduces the direct force of gas pressure impact on the valve disc and the entire valve body, and avoids the pressure impact from directly damaging the valve disc, causing the valve to fail to open and close normally, or damaging the valve body and affecting its sealing performance.

[0016] 3. This utility model features a pressure sensor installed at the front end of the valve body, enabling real-time monitoring of the pipeline pressure after the valve disc closes. Simultaneously, a ring-shaped warning light strip is installed above the valve body. Its internal sensitive element detects pressure changes in the gas within the pipeline after valve closure and converts the pressure signal into an electrical signal, which is transmitted in real-time to the connected control system, thus achieving real-time monitoring of the pipeline pressure. The ring-shaped warning light strip installed above the valve body is connected to the pressure sensor and control system. When the pressure detected by the pressure sensor exceeds the preset normal range, the control system issues a command to energize and illuminate the ring-shaped warning light strip, providing a conspicuous warning to surrounding personnel, quickly identifying and indicating the problem, and facilitating timely handling by staff. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a top view of the present invention;

[0019] Figure 3 This is a schematic diagram of the AA cross-section of this utility model;

[0020] Figure 4 This is an exploded view of the valve disc assembly of this utility model.

[0021] In the diagram: 1. Valve body; 2. Handwheel; 3. Valve seat; 4. Valve disc assembly; 5. Buffer tube; 6. Flange; 7. Pressure sensor; 8. Annular warning light strip; 9. Valve stem; 10. First sealing packing; 11. Limiting groove; 12. Second sealing packing; 13. Buffer spring; 14. First disc body; 15. Second disc body; 16. Connecting rod; 17. Slot; 18. Connecting block; 19. Locking block; 20. Bolt; 21. Threaded hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 An embodiment of this utility model is provided: a butterfly valve assembly for treating chemical waste gas, including a valve body 1, a valve seat 3 is provided inside the valve body 1, a connecting rod 16 is provided at both the upper and lower ends of the valve seat 3, and the connecting rod 16 is connected to the valve seat 3 through bearings, a handwheel 2 is rotatably installed at the top of the valve body 1, a valve stem 9 is fixedly installed on the shaft at the lower end of the handwheel 2, the valve stem 9 is connected to the valve body 1 through bearings, and the bottom of the valve stem 9 is fixed to the upper connecting rod 16, a valve disc assembly 4 is installed inside the valve seat 3, the valve disc assembly 4 is a combined structure, and the valve disc assembly 4 is positioned between the upper and lower connecting rods 16;

[0024] Turning handwheel 2 causes valve stem 9 to rotate. Valve stem 9 is fixedly connected to connecting rod 16 above, which in turn causes connecting rod 16 to rotate around the bearing on valve seat 3. Ultimately, this causes valve disc assembly 4 located between connecting rods 16 to rotate, thus opening and closing the valve. This makes valve operation relatively simple, as the movement of valve disc assembly 4 can be precisely controlled by turning the handwheel, facilitating the adjustment of the flow rate of chemical waste gas.

[0025] Please see Figure 3 and Figure 4 The valve assembly 4 includes a first valve body 14 and a second valve body 15, with rubber liners on the contact surfaces of both. Six annularly distributed bolts 20 are located on the outer side of the first valve body 14, and six annularly distributed threaded holes 21 are located on the inner side of the second valve body 15. The bolts 20 are fitted into the threaded holes 21. During installation, the first valve body 14 and the second valve body 15 are brought together, the bolts 20 are aligned with the threaded holes 21, and then tightened. The rubber liners enhance the sealing effect. The detachable design of the valve assembly 4 facilitates maintenance and replacement. When the valve body is worn or damaged, a portion of the valve body can be disassembled and replaced individually, reducing maintenance costs. The rubber liners effectively improve sealing performance and reduce chemical waste gas leakage.

[0026] Please see Figure 4 The first valve body 14 and the second valve body 15 are each provided with a semi-circular cross-section connecting block 18 at their upper and lower ends. A locking block 19 is integrally formed at the middle position of the inner side of the connecting block 18. Both sides of the connecting rod 16 are provided with locking grooves 17. After the connecting block 18 and the connecting rod 16 are combined, the locking block 19 engages with the locking grooves 17. When installing the valve disc assembly 4 onto the connecting rod 16, the connecting block 18 is aligned with the connecting rod 16, causing the locking block 19 to embed into the locking groove 17, thus achieving a key connection between the two. This facilitates the valve rod 9 in driving the valve disc assembly 4 to rotate. This connection method is convenient to install, allows for quick installation of the valve disc assembly 4 and the connecting rod 16, and provides a stable and reliable connection, ensuring the stability of the valve disc assembly 4 during rotation.

[0027] Please see Figure 3A first sealing packing 10 is provided between the valve stem 9 and the upper end of the valve body 1, which effectively improves the sealing performance at the connection between the valve stem 9 and the valve body 1, prevents leakage of chemical waste gas, ensures the normal operation of the waste gas treatment system, and reduces the risk of environmental pollution.

[0028] Please see Figure 1 and Figure 3 Both sides of the valve body 1 are provided with buffer tubes 5, and one end of the buffer tube 5 extends into the limiting groove 11 on the side of the valve body 1. A buffer spring 13 is installed between the end of the buffer tube 5 and the limiting groove 11. The outer wall of the buffer tube 5 is provided with a second sealing packing 12 that fits against the inner wall of the limiting groove 11. When the gas pressure in the pipeline increases instantaneously, the impact force acts on the valve disc assembly 4 and is then transmitted to the valve body 1. At this time, the buffer tube 5 slides in the limiting groove 11, compressing the buffer spring 13. The buffer spring 13 deforms and absorbs the impact energy. The second sealing packing 12 ensures the seal at the connection between the buffer tube 5 and the limiting groove 11. The buffer tube 5 and the buffer spring 13 can effectively absorb pressure shocks, protect the valve disc assembly 4 and the valve body 1 from excessive impact damage, extend the service life of the equipment, and ensure that no exhaust gas leakage occurs at the buffer device.

[0029] Please see Figure 1 A pressure sensor 7 is installed at the front end of the valve body 1, and the output of the pressure sensor 7 is connected to a microcontroller. An annular warning light strip 8 is installed on the upper exterior of the valve body 1, and the output of the microcontroller is connected to the annular warning light strip 8. The pressure sensor 7 monitors the pressure in the pipeline in real time after the valve disc is closed and transmits the pressure signal to the microcontroller. When the pressure exceeds the preset range, the microcontroller controls the annular warning light strip 8 to illuminate. The pressure sensor 7 and the annular warning light strip 8 work together to monitor the pipeline pressure in real time, promptly detect abnormal pressure conditions, and issue warnings, facilitating rapid response by personnel and ensuring the safe and stable operation of the chemical waste gas treatment system.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A butterfly valve assembly for treating chemical waste gases comprising a valve body (1) characterised in that: The inside of the valve body (1) is provided with a valve seat (3), the upper and lower ends of the valve seat (3) are provided with connecting rods (16), and the connecting rods (16) are connected with the valve seat (3) through bearings, the top end of the valve body (1) is rotatably installed with a hand wheel (2), the shaft at the lower end of the hand wheel (2) is fixedly installed with a valve rod (9), the valve rod (9) is connected with the valve body (1) through a bearing, and the bottom of the valve rod (9) is fixed with the upper connecting rod (16), the inside of the valve seat (3) is installed with a valve clack assembly (4), the valve clack assembly (4) is a combined structure, and the valve clack assembly (4) is positioned between the upper and lower connecting rods (16).

2. The butterfly valve assembly for treating chemical waste gas according to claim 1, wherein: The valve clack assembly (4) comprises a first clack body (14) and a second clack body (15), and the contact surfaces of the first clack body (14) and the second clack body (15) are provided with rubber linings, the outer side of the first clack body (14) is provided with six annularly distributed bolts (20), the inner side of the second clack body (15) is provided with six annularly distributed threaded holes (21), and the bolts (20) are matched with the threaded holes (21).

3. The butterfly valve assembly for treating chemical waste gas according to claim 2, wherein: The upper and lower ends of the first clack body (14) and the second clack body (15) are provided with connecting blocks (18) with semicircular cross sections, the inner side of the connecting block (18) is integrally formed with a clamping block (19) at the middle position, the two sides of the connecting rod (16) are provided with clamping grooves (17), and after the connecting block (18) and the connecting rod (16) are combined, the clamping block (19) is clamped with the clamping groove (17).

4. The butterfly valve assembly for treating chemical waste gas according to claim 1, wherein: The valve rod (9) and the upper end of the valve body (1) are provided with a first sealing packing (10).

5. The butterfly valve assembly for treating chemical waste gas according to claim 1, wherein: The two sides of the valve body (1) are provided with buffer pipes (5), one end of the buffer pipe (5) extends into the limiting groove (11) at the side end of the valve body (1), and a buffer spring (13) is installed between the end of the buffer pipe (5) and the limiting groove (11).

6. The butterfly valve assembly for treating chemical waste gas according to claim 5, wherein: The outer wall of the buffer pipe (5) is provided with a second sealing packing (12) which is fitted with the inner wall of the limiting groove (11).

7. The butterfly valve assembly for treating chemical waste gas according to claim 1, wherein: The front end of the valve body (1) is provided with a pressure sensor (7), the output end of the pressure sensor (7) is connected with a single-chip microcomputer, the outer side of the upper end of the valve body (1) is provided with an annular warning light belt (8), and the output end of the single-chip microcomputer is connected to the annular warning light belt (8).

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