A clamp-on butterfly valve

Abstract

The utility model discloses a kind of clamping butterfly valves, including butterfly valve body, the liquid outlet end fixed intercommunication of butterfly valve body has fixed pipe, the outer surface side fixed intercommunication of fixed pipe has inflating air nozzle, the top fixed intercommunication of fixed pipe has detection pipe, the detection pipe screw thread installation has elastic detection block;The liquid outlet end fixed connection of fixed pipe has shell, the outer surface side of shell is equipped with through hole that is penetrated to other side, and through hole is matched with fixed pipe, and screw rod type opening and closing component is jointly installed in through hole and shell.In the utility model, by additionally providing fixed pipe, inflating air nozzle and detection pipe with elastic detection block in liquid outlet end, realize the airtightness rapid detection under undismounted state, by inflating pressure to promote elastic detection block displacement, can be directly judged sealing performance, greatly simplify detection process, improve the maintenance efficiency, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a wafer-type butterfly valve. Background Technology

[0002] A wafer butterfly valve is a device that opens and closes a pipeline by rotating a disc to achieve full opening or closing. It mainly consists of a valve body and a disc-shaped disc, with the disc installed in the diameter direction of the pipeline. This valve has a simple structure, small size, and light weight. It uses elastic or metal sealing types and is usually installed horizontally in industrial pipelines such as petroleum, chemical, water treatment, and cooling water systems of thermal power plants.

[0003] In traditional wafer butterfly valves, the sealing performance of sealing elements such as the valve seat deteriorates due to wear and aging during use, leading to internal leakage. Currently, detecting such leaks usually requires completely disassembling the valve from the piping system and conducting offline testing. This method is cumbersome and time-consuming, severely impacting the continuous operation and maintenance efficiency of the equipment, and it cannot achieve rapid daily diagnostics.

[0004] Therefore, we propose a wafer-type butterfly valve. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a wafer-type butterfly valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a wafer-type butterfly valve, comprising a butterfly valve body, a fixed pipe fixedly connected to the liquid outlet end of the butterfly valve body, an air inlet fixedly connected to one side of the outer surface of the fixed pipe, a detection pipe fixedly connected to the top of the fixed pipe, and an elastic detection block threadedly installed on the detection pipe.

[0007] The liquid outlet end of the fixed tube is fixedly connected to a housing. A through hole is opened on one side of the outer surface of the housing, which extends to the other side and matches the fixed tube. A screw-type opening and closing assembly is installed together with the through hole and the housing.

[0008] A connecting pipe is fixedly connected to one side of the outer surface of the housing, and the connecting pipe matches the through hole.

[0009] Furthermore, an observation window is fixedly embedded on one side of the outer surface of the detection tube. The observation window is made of transparent material, which allows staff to directly and clearly observe the displacement of the elastic detection block from the outside.

[0010] Furthermore, the elastic detection block includes a piston block, and the detection tube is sealed and slidably sleeved on the outer surface of the piston block. A red marking plate is fixedly connected to the top of the piston block, and a spring is fixedly connected to the top of the red marking plate. The piston block converts gas pressure into linear displacement, while the red marking plate provides eye-catching and intuitive visual feedback. The spring provides a reset force and maintains the marking position when the pressure is stable.

[0011] Furthermore, an end cap is fixedly connected to the top of the spring, and the end cap is threaded onto the top of the detection tube. The threaded connection of the end cap ensures the sealing of the detection chamber and facilitates disassembly.

[0012] Furthermore, the screw-type opening and closing assembly includes a handwheel, which is located at one end of the housing. A screw is fixedly connected to one side of the outer surface of the handwheel, and the screw passes through the housing and is rotatably connected to the housing. A valve plate is threaded onto the outer surface of the screw, and the outer walls on both sides of the valve plate slide in a sealed fit with the inner walls on both sides of the housing. The housing has a limiting effect on the movement of the valve plate, which can ensure the stability of the valve plate movement.

[0013] Furthermore, a circular hole is provided on one side of the outer surface of the valve plate, extending to the other side, and the circular hole matches the through hole. When the circular hole and the through hole are aligned, a smooth flow channel is formed. When they are misaligned, the solid part of the valve plate reliably blocks the flow channel.

[0014] The beneficial effects of this utility model are:

[0015] In use, this invention achieves rapid airtightness testing without disassembly by adding a fixed tube, an inflation nozzle, and a detection tube with an elastic detection block to the liquid outlet end. By using inflation pressure to push the elastic detection block to move, the sealing performance can be directly judged, which greatly simplifies the testing process, improves maintenance efficiency, and reduces maintenance costs. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a first-person perspective three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the shell structure of this utility model;

[0020] Figure 4 This is a cross-sectional view of the detection tube of this utility model.

[0021] The attached figures are labeled as follows:

[0022] 1. Butterfly valve body; 2. Connecting pipe; 3. Fixed pipe; 4. Housing; 5. Handwheel; 6. Detection pipe; 7. Air inlet; 8. Round hole; 9. Through hole; 10. Screw; 11. Valve plate; 12. Observation window; 13. Red marking plate; 14. End cap; 15. Spring; 16. Piston block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-4 As shown, a wafer-type butterfly valve is disclosed, including a butterfly valve body 1. A fixed pipe 3 is fixedly connected to the liquid outlet end of the butterfly valve body 1. An air inlet 7 is fixedly connected to one side of the outer surface of the fixed pipe 3. The air inlet 7, also called an air valve, is a bridge connecting the air source and the object being inflated. Its main function is to control the inflow of gas, ensure that the gas can smoothly enter the object being inflated, and prevent air leakage.

[0025] A detection tube 6 is fixedly connected to the top of the fixed tube 3. An observation window 12 is fixedly embedded on one side of the outer surface of the detection tube 6. The observation window 12 allows for easy observation of the internal condition of the detection tube 6. At the same time, the outer surface of the observation window 12 is marked with scales so that the detection results can be observed intuitively.

[0026] The detection tube 6 is threaded with an elastic detection block, which includes a piston block 16. The detection tube 6 is slidably fitted onto the outer surface of the piston block 16. A red identification plate 13 is fixedly connected to the top of the piston block 16. A spring 15 is fixedly connected to the top of the red identification plate 13. An end cap 14 is fixedly connected to the top of the spring 15, and the end cap 14 is threaded onto the top of the detection tube 6. A sealing ring is fixedly fitted onto the outer surface of the piston block 16. The sealing ring abuts against the inner wall of the detection tube 6 to ensure the sealing of the connection between the detection tube 6 and the piston block 16. The spring 15 is made of 304 stainless steel, which has good corrosion resistance.

[0027] The outlet end of the fixed pipe 3 is fixedly connected to the housing 4. A through hole 9 is opened on one side of the outer surface of the housing 4, which extends to the other side and matches the fixed pipe 3. A screw-type opening and closing assembly is installed together with the through hole 9 and the housing 4. The screw-type opening and closing assembly includes a handwheel 5, which is located at one end of the housing 4. A screw 10 is fixedly connected to one side of the outer surface of the handwheel 5, and the screw 10 extends through the housing 4 and is rotatably connected to the housing 4. A valve plate 11 is threaded onto the outer surface of the screw 10, and the outer walls on both sides of the valve plate 11 are sealed and sliding against the inner walls on both sides of the housing 4. A circular hole 8 is opened on one side of the outer surface of the valve plate 11, which extends to the other side and matches the through hole 9. The thread helix angle of the screw 10 is less than the friction angle, so that the screw 10 has a self-locking ability and can avoid displacement due to vibration or load. Both sides of the valve plate 11 are sealed and abutted by annular sealing gaskets, which are fixedly connected to the inner walls on both sides of the housing 4 and match the through hole 9.

[0028] A connecting pipe 2 is fixedly connected to one side of the outer surface of the housing 4, and the connecting pipe 2 matches the through hole 9.

[0029] Working principle: Rotating the handwheel 5 in the screw-type opening and closing assembly causes the screw 10, fixedly connected to one side of its outer surface, to rotate on the housing 4. The rotation of the screw 10 causes the valve plate 11, threaded onto its outer surface, to slide along the inner wall of the housing 4. When the circular hole 8 on one side of the valve plate 11 aligns with the through hole 9, fluid flows out from the butterfly valve body 1, through the fixed pipe 3 connected to the outlet end of the butterfly valve body 1, the through hole 9 of the housing 4, and the circular hole 8 of the valve plate 11, finally exiting from the connecting pipe 2 fixedly connected to one side of the outer surface of the housing 4, thus opening the butterfly valve. When it is necessary to test the airtightness of the butterfly valve body 1, close the butterfly valve body 1, then rotate the handwheel 5 in the opposite direction, causing the screw 10 to rotate and the valve plate 11 to slide until the circular hole 8 and the through hole 9 are misaligned. The valve plate 11 then seals and blocks the through hole 9, thus opening the valve. Pipe 3 becomes a sealed space. Then, the external inflation device fills the fixed pipe 3 with test gas through the inflation nozzle 7 fixedly connected to one side of the outer surface of the fixed pipe 3. The gas pressure acts on the elastic detection block in the fixed detection pipe 6 at the top of the fixed pipe 3, pushing the piston block 16 to slide upward. The red label plate 13 fixedly connected to the top of the piston block 16 moves upward accordingly. At the same time, the spring 15 fixedly connected to the top of the red label plate 13 is compressed. After the inflation stops, the staff observes the position of the red label plate 13 through the observation window 12 fixedly embedded to one side of the outer surface of the detection pipe 6. If the position of the red label plate 13 is stable, it indicates that the airtightness of each connection of the butterfly valve is good. If the red label plate 13 drops, it indicates that there is a leak. Thus, the airtightness auxiliary test is achieved without disassembly.

[0030] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A wafer-type butterfly valve, comprising a butterfly valve body (1), characterized in that: The liquid outlet end of the butterfly valve body (1) is fixedly connected to a fixed pipe (3), and an air inlet (7) is fixedly connected to one side of the outer surface of the fixed pipe (3). A detection pipe (6) is fixedly connected to the top of the fixed pipe (3), and an elastic detection block is threaded onto the detection pipe (6). The liquid outlet end of the fixed tube (3) is fixedly connected to the housing (4). A through hole (9) is opened on one side of the outer surface of the housing (4) and extends to the other side. The through hole (9) matches the fixed tube (3). The through hole (9) and the housing (4) are jointly equipped with a screw-type opening and closing assembly. A connecting pipe (2) is fixedly connected to one side of the outer surface of the housing (4), and the connecting pipe (2) matches the through hole (9).

2. The wafer-type butterfly valve according to claim 1, characterized in that: An observation window (12) is fixedly embedded on one side of the outer surface of the detection tube (6).

3. A wafer-type butterfly valve according to claim 1, characterized in that: The elastic detection block includes a piston block (16), and the detection tube (6) is sealed and slidably sleeved on the outer surface of the piston block (16). A red marking plate (13) is fixedly connected to the top of the piston block (16), and a spring (15) is fixedly connected to the top of the red marking plate (13).

4. A wafer-type butterfly valve according to claim 3, characterized in that: The top of the spring (15) is fixedly connected to an end cap (14), and the end cap (14) is threaded onto the top of the detection tube (6).

5. A wafer-type butterfly valve according to claim 1, characterized in that: The screw-type opening and closing assembly includes a handwheel (5), which is located at one end of the housing (4). A screw (10) is fixedly connected to one side of the outer surface of the handwheel (5), and the screw (10) passes through the housing (4) and is rotatably connected to the housing (4). A valve plate (11) is threaded onto the outer surface of the screw (10), and the outer walls on both sides of the valve plate (11) are sealed and sliding against the inner walls on both sides of the housing (4).

6. A wafer-type butterfly valve according to claim 5, characterized in that: The valve plate (11) has a circular hole (8) on one side of its outer surface that extends to the other side, and the circular hole (8) matches the through hole (9).

Images