Butterfly valve capable of monitoring inner leakage on line

Abstract

The utility model discloses a butterfly valve capable of monitoring inner leakage on line, which comprises a valve body and a clamping part, the valve body comprises flange plates arranged on two sides of the valve body, a butterfly plate is arranged in the valve body, a pin is inserted into the side surface of the butterfly plate, a valve rod is rotatably arranged at the center line of an inner cavity of the valve body, a valve actuator is arranged at the top of the valve body, and the clamping part is arranged on the valve actuator. The clamping part is arranged on the side face of the valve body and comprises a connecting frame arranged on the side face of the valve body, a lead screw is arranged in the connecting frame along the valve body in a reverse rotating mode, a sliding frame is arranged in the connecting frame in a sliding mode, and the lead screw penetrates through the sliding frame to be in threaded connection with the sliding frame. The lead screw rotates to drive the sliding frame to move to clamp the pipeline so as to fix the position of the flange plate. By arranging the clamping part, the sliding frame can be driven to slide and displace in the connecting frame through rotation of the lead screw, so that the edge of a pipeline connected with a flange plate is clamped and fixed by the sliding frame, and the stability and the mounting efficiency of a valve body during mounting are improved.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically a butterfly valve capable of online monitoring of internal leakage. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve is characterized by its closing element (valve disc or butterfly plate) being a circular plate that rotates around a valve shaft to open and close. Butterfly valves can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media. In pipelines, they primarily function as shut-off and throttling devices.

[0003] During installation, existing butterfly valves require manual intervention from installers to align the flange with the pipeline before securing them with bolts. Otherwise, the valve may sag and shift off-center under gravity until installation is complete, increasing the workload for installers and reducing installation efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a butterfly valve that can monitor internal leakage online, in order to solve the problem mentioned in the background art that the existing butterfly valves require the installer to manually hold the butterfly valve in contact with the pipeline to align the flange with the pipeline before fixing it with bolts, etc. Otherwise, the butterfly valve will fall and deviate from the pipeline under the action of gravity until the installation is completed, which increases the workload of the installer and reduces the installation efficiency of the butterfly valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a butterfly valve capable of online monitoring of internal leakage, comprising a valve body and a clamping part:

[0006] The valve body includes flanges on both sides. A sealing ring is located inside the valve body, and an insert is located on the side of the sealing ring away from the valve body. The insert engages with the valve body. A butterfly plate is located inside the valve body, and a pin is inserted through the side of the butterfly plate. A valve stem is rotatably mounted at the center line of the valve body's inner cavity. The butterfly plate is fixedly connected to the valve stem via a pin connection. A valve actuator is located on the top of the valve body, and its output end is connected to the valve stem to drive the butterfly plate to rotate. A clamping part is located on the side of the valve body, including a connecting frame. A lead screw is mounted inside the connecting frame and rotates in the opposite direction to the valve body. A sliding frame is slidably mounted inside the connecting frame, and the lead screw passes through the sliding frame and is threadedly connected to it. Rotation of the lead screw causes the sliding frame to displace and clamp the pipe, thus fixing the position of the flange.

[0007] By adopting the above technical solution, the rotation of the lead screw can drive the sliding frame to slide inside the connecting frame, thereby allowing the sliding frame to clamp and fix the edge of the pipe connected to the flange, improving the stability and installation efficiency of the valve body during installation.

[0008] Preferably, the valve body further includes several acoustic emission sensors coupled to the side of the valve body and an acoustic emission monitor connected to the acoustic emission sensors. The acoustic emission sensors are connected to the remotely controlled acoustic emission monitor via signal lines.

[0009] By adopting the above technical solution, the vibration and sound signals that may indicate leakage at the sealing surface between the sealing ring and the valve stem can be received by the acoustic emission sensor and transmitted through the acoustic emission monitoring instrument.

[0010] Preferably, the clamping part further includes a sliding groove formed on the side of the connecting frame, and the two sliding frames are embedded in the sliding groove and slidably connected to the connecting frame, and the two sliding frames are arranged in a mirror image of each other.

[0011] By adopting the above technical solution, the two sliding frames can slide and move on the side of the connecting frame.

[0012] Preferably, the clamping part further includes a drive shaft rotatably disposed inside the connecting frame. The connecting frame has a rotating groove inside, and the drive shaft is embedded in the rotating groove and rotatably connected to the connecting frame. One end of the drive shaft extends to the outside of the connecting frame and is provided with a turntable.

[0013] By adopting the above technical solution, the turntable can be rotated, thereby driving the drive shaft to rotate inside the connecting frame.

[0014] Preferably, the clamping part further includes a bevel tooth b disposed at one end of the drive shaft, and a bevel tooth a disposed at one end of the lead screw, the bevel tooth a being engaged with the bevel tooth b.

[0015] By adopting the above technical solution, the rotation of the drive shaft can drive the two lead screws to rotate inside the connecting frame.

[0016] Preferably, the clamping part further includes a threaded groove formed inside the sliding frame, and the two lead screws respectively pass through the threaded grooves formed on the two sliding frames and are threadedly connected to them.

[0017] By adopting the above technical solution, the rotation of the two lead screws can drive the two sliding frames to slide and displace inside the connecting frame.

[0018] Preferably, the clamping part also has a chuck disposed at one end of the sliding frame, the chuck being located at the top of the flange and abutting against it.

[0019] By adopting the above technical solution, the displacement of the sliding frame allows the clamp to hold and fix the edge of the pipe connected to the flange, thereby improving the stability and installation efficiency of the valve body.

[0020] Preferably, the clamping part further includes a limiting rod disposed on the top of the valve body and a through hole opened inside the sliding frame, the limiting rod passing through the through hole and slidably connected thereto.

[0021] By adopting the above technical solution, the sliding frame can slide along the limit rod during sliding, which improves the stability of the sliding frame during sliding.

[0022] Compared with existing technologies, the advantages of this invention are as follows: By incorporating a clamping part, the sliding frame can be moved within the connecting frame by the rotation of the lead screw, thereby clamping and fixing the edge of the pipe connected to the flange, improving the stability and efficiency of valve body installation. When internal leakage occurs in the valve, the medium will exhibit leakage vibration and acoustic signals from the sealing ring and valve stem sealing surface. These signals are transmitted through the internal material of the valve body, received by the acoustic emission sensor, and transmitted to the acoustic emission monitoring instrument. Subsequently, remote monitoring personnel can immediately identify when internal leakage has occurred in the valve. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this application;

[0025] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this application;

[0026] Figure 4 This is a schematic cross-sectional view of the clamping part in this application;

[0027] Figure 5 This is a schematic diagram of the sliding frame structure of this application;

[0028] Figure 6 This is a schematic diagram of the connection structure between this application and the pipeline.

[0029] In the diagram: 1. Valve body; 101. Flange; 102. Sealing ring; 103. Insert; 104. Butterfly plate; 105. Pin; 106. Valve stem; 107. Valve actuator; 108. Acoustic emission sensor; 109. Acoustic emission monitor; 2. Clamping part; 201. Connecting frame; 202. Lead screw; 203. Bevel tooth a; 204. Drive shaft; 205. Bevel tooth b; 206. Sliding frame; 207. Threaded groove; 208. Chuck; 209. Perforation; 210. Limiting rod. Detailed Implementation

[0030] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides a technical solution: a butterfly valve capable of online monitoring of internal leakage, comprising a valve body 1 and a clamping part 2.

[0033] Flanges 101 are provided on both sides of the valve body 1. The flanges 101 are connected to the pipeline by through bolts. A sealing ring 102 is provided inside the valve body 1. An insert 103 is provided on the side of the sealing ring 102 away from the valve body 1. The insert 103 is engaged with the valve body 1. A butterfly plate 104 is provided inside the valve body 1. A pin 105 is inserted through the side of the butterfly plate 104. A valve stem 106 is rotatably installed at the center line of the inner cavity of the valve body 1. The butterfly plate 104 is fixedly connected to the valve stem 106 by the pin 105. A valve actuator 107 is installed at the top of valve body 1. The output end of valve actuator 107 is connected to valve stem 106 to drive butterfly plate 104 to rotate. Several acoustic emission sensors 108 are installed and coupled on the side of valve body 1. Acoustic emission monitoring instrument 109 is connected to the side of acoustic emission sensor 108. The main types of acoustic emission sensors 108 are: high-sensitivity acoustic emission sensors, which are the most widely used type of resonant acoustic emission sensors; and broadband acoustic emission sensors, which are usually composed of multiple piezoelectric elements of different thicknesses, or use concave spheres. The use of surface-shaped and wedge-shaped piezoelectric elements achieves the purpose of widening the frequency band; high-temperature acoustic emission sensors are usually made of lithium niobate or lead titanate ceramics; differential acoustic emission sensors are composed of two piezoelectric elements with different positive and negative poles, which output corresponding differential signals, and the signals are amplified by superposition; in addition, there are miniature acoustic emission sensors, magnetic adsorption acoustic emission sensors, low-frequency suppressed acoustic emission sensors, and capacitive acoustic emission sensors, etc. The above are public technologies and will not be described in detail below. The acoustic emission sensor 108 is connected to the remotely controlled acoustic emission monitor 109 through a signal line. The principle of the acoustic emission monitor 109 is that when a material is subjected to external or internal forces, it will produce a process of dislocation-slip-microcrack formation-crack propagation-fracture. During this process, strain energy will be released in the form of elastic waves. This phenomenon is called acoustic emission. The acoustic emission sensor 108 can receive the vibration and sound signals of leakage at the sealing surface of the sealing ring 102 and the valve stem 106. The acoustic emission monitor 109 uses piezoelectric and other acoustic wave-electric signal sensors to capture these acoustic emission signals. The sensor converts sound waves into electrical signals, and then performs high-speed, high-precision data acquisition. The above is publicly available technology and will not be described in detail below. The data is transmitted through the acoustic emission monitoring instrument 109. The clamping part 2 is set on the side of the valve body 1. A connecting frame 201 is set on the side of the valve body 1. A lead screw 202 is installed inside the connecting frame 201 and rotates in the opposite direction along the valve body 1. A sliding frame 206 is slidably set inside the connecting frame 201. The lead screw 202 passes through the sliding frame 206 and is threadedly connected to it. The rotation of the lead screw 202 drives the sliding frame 206 to move and clamp the pipe to fix the position of the flange 101. The rotation of the lead screw 202 can drive the sliding frame 206 to slide and move inside the connecting frame 201, so that the sliding frame 206 clamps and fixes the edge of the pipe connected to the flange 101, thereby improving the stability and installation efficiency of the valve body 1 during installation.

[0034] The desired effect of this embodiment is that when internal leakage occurs in the valve, the medium will generate vibrations and acoustic signals from the sealing surface between the sealing ring 102 and the valve stem 106. These signals are transmitted through the internal material of the valve body 1, and after being received by the acoustic emission sensor 108, they are transmitted to the acoustic emission monitor 109. Later, the management personnel conducting remote monitoring can immediately and clearly know that internal leakage has occurred in the valve.

[0035] Example 2

[0036] Please see Figure 4 , Figure 5 and Figure 6 This embodiment provides a technical solution: a butterfly valve capable of online monitoring of internal leakage, including a clamping part 2, a connecting frame 201, and a sliding frame 206.

[0037] A sliding groove is provided on the side of the connecting frame 201. Two sliding frames 206 are embedded in the sliding groove and slidably connected to the connecting frame 201. The two sliding frames 206 are mirror images of each other, allowing them to slide and move along the side of the connecting frame 201. A drive shaft 204 is rotatably mounted inside the connecting frame 201. A rotating groove is provided inside the connecting frame 201, and the drive shaft 204 is embedded in the rotating groove and rotatably connected to the connecting frame 201. One end of the drive shaft 204 extends to the outside of the connecting frame 201 and is provided with a turntable. Rotating the turntable drives the drive shaft 204 to rotate inside the connecting frame 201. A bevel tooth b205 is provided at one end of the drive shaft 204, and a bevel tooth a203 is provided at one end of the lead screw 202. The bevel tooth a203 meshes with the bevel tooth b205. The rotation of the drive shaft 204 drives the two lead screws 202 to rotate inside the connecting frame 201. The sliding frame 206 has a threaded groove 207 inside. Two lead screws 202 pass through the threaded grooves 207 on the two sliding frames 206 and are threaded to them. The rotation of the two lead screws 202 can drive the two sliding frames 206 to slide and move inside the connecting frame 201. A clamp 208 is provided at one end of the sliding frame 206. The clamp 208 is located on the top of the flange 101 and abuts against it. The displacement of the sliding frame 206 can allow the clamp 208 to clamp and fix the edge of the pipe connected to the flange 101, improving the stability and installation efficiency of the valve body 1. A limit rod 210 is provided at the top of the valve body 1. A through hole 209 is provided inside the sliding frame 206. The limit rod 210 passes through the through hole 209 and is slidably connected to it, allowing the sliding frame 206 to slide and move along the limit rod 210 when sliding, improving the stability of the sliding frame 206 when sliding.

[0038] The desired effect of this second embodiment is that by rotating the turntable to drive the lead screw 202 to rotate, the displacement of the sliding frame 206 is controlled, so that the clamp 208 clamps and fixes the edge of the pipe connected to the flange 101, thereby improving the stability and installation efficiency of the valve body 1 during installation.

[0039] Working principle: First, when installing valve body 1, the drive shaft 204 is rotated inside the connecting frame 201 by rotating the turntable. Then, the drive shaft 204 drives two lead screws 202 to rotate inside the connecting frame 201. The rotation of the two lead screws 202 drives the two sliding frames 206 to slide and move inside the connecting frame 201. A clamp 208 is provided at one end of the sliding frame 206. The clamp 208 is located on the top of the flange 101 and abuts against it. By the displacement of the sliding frame 206, the clamp 208 can clamp and fix the edge of the pipe connected to the flange 101, thereby improving the stability and installation efficiency of valve body 1 during installation.

[0040] Secondly, when this type of butterfly valve with online internal leakage monitoring is operating on the pipeline, under normal closed operation, when the valve is tightly shut and perfectly sealed, the acoustic emission sensor 108 will not receive any signal indicating internal leakage. However, once the valve experiences a seal failure—internal leakage—the medium will vibrate and produce acoustic signals from the sealing surface between the sealing ring 102 and the valve stem 106. These signals are transmitted through the internal material of the valve body 1 and, after being received by the acoustic emission sensor 108, are transmitted to the acoustic emission monitor 109. Later, remote monitoring personnel can immediately recognize the presence of internal leakage. Furthermore, they can compare the different internal leakage signal data previously calibrated by the acoustic emission monitor 109 to determine the severity of the internal leakage. This provides valuable reference for subsequent shutdown maintenance.

[0041] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A butterfly valve capable of monitoring internal leakage on-line, characterized in that, The utility model relates to a valve body (1) and clamping part (2) of pipeline flange plate (101) are fixed, and the valve body (1) is provided with butterfly plate (104) and valve stem (106) and valve actuator (107), and the clamping part (2) is provided with connecting frame (201) and screw rod (202) and sliding frame (206) and drive shaft (204) and cone gear b (205) and cone gear a (203) and screw groove (207) and chuck (208). The utility model relates to a valve body (1) and clamping part (2) of pipeline flange plate (101) are fixed, and the valve body (1) is provided with butterfly plate (104) and valve stem (106) and valve actuator (107), and the clamping part (2) is provided with connecting frame (201) and screw rod (202) and sliding frame (206) and drive shaft (204) and cone gear b (205) and cone gear a (203) and screw groove (207) and chuck (208). The utility model relates to a valve body (1) and clamping part (2) of pipeline flange plate (101) are fixed, and the valve body (1) is provided with butterfly plate (104) and valve stem (106) and valve actuator (107), and the clamping part (2) is provided with connecting frame (201) and screw rod (202) and sliding frame (206) and drive shaft (204) and cone gear b (205) and cone gear a (203) and screw groove (207) and chuck (208).

2. The butterfly valve capable of monitoring internal leakage on line according to claim 1, characterized in that: The utility model relates to a valve body (1) and clamping part (2) of pipeline flange plate (101) are fixed, and the valve body (1) is provided with butterfly plate (104) and valve stem (106) and valve actuator (107), and the clamping part (2) is provided with connecting frame (201) and screw rod (202) and sliding frame (206) and drive shaft (204) and cone gear b (205) and cone gear a (203) and screw groove (207) and chuck (208).

3. The butterfly valve capable of monitoring internal leakage on line according to claim 1, characterized in that: The utility model relates to a valve body (1) and clamping part (2) of pipeline flange plate (101) are fixed, and the valve body (1) is provided with butterfly plate (104) and valve stem (106) and valve actuator (107), and the clamping part (2) is provided with connecting frame (201) and screw rod (202) and sliding frame (206) and drive shaft (204) and cone gear b (205) and cone gear a (203) and screw groove (207) and chuck (208).

4. The butterfly valve capable of monitoring internal leakage on line according to claim 1, characterized in that: The utility model relates to a valve body (1) and clamping part (2) of pipeline flange plate (101) are fixed, and the valve body (1) is provided with butterfly plate (104) and valve stem (106) and valve actuator (107), and the clamping part (2) is provided with connecting frame (201) and screw rod (202) and sliding frame (206) and drive shaft (204) and cone gear b (205) and cone gear a (203) and screw groove (207) and chuck (208).

5. The butterfly valve capable of monitoring internal leakage on line according to claim 4, characterized in that: The utility model relates to a valve body (1) and clamping part (2) of pipeline flange plate (101) are fixed, and the valve body (1) is provided with butterfly plate (104) and valve stem (106) and valve actuator (107), and the clamping part (2) is provided with connecting frame (201) and screw rod (202) and sliding frame (206) and drive shaft (204) and cone gear b (205) and cone gear a (203) and screw groove (207) and chuck (208).

6. The butterfly valve capable of monitoring internal leakage on line according to claim 4, characterized in that: ​ 7. The butterfly valve capable of monitoring internal leakage on line according to claim 1, characterized in that: ​ 8. The butterfly valve capable of monitoring internal leakage on line according to claim 1, characterized in that: The clamping part (2) further comprises a limiting rod (210) arranged on the top of the valve body (1) and a through hole (209) arranged in the sliding frame (206), and the limiting rod (210) is in sliding connection with the through hole (209).

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