Vibration detection device and detection method for low-temperature stop valve

Abstract

The invention relates to the technical field of low-temperature stop valve vibration sensing detection, and particularly discloses a low-temperature stop valve vibration detection device and method.The low-temperature stop valve vibration detection device comprises a valve body, a first connecting pipe and a second connecting pipe, the valve body is provided with a first mounting ring, a mounting base and a vibration detection assembly, and the first connecting pipe and the second connecting pipe are provided with a second mounting ring; a locking mechanism is arranged on the second mounting ring; the vibration detection assembly can detect the leakage risk of the connecting positions of the two ends of the valve body and the first connecting pipe and the second connecting pipe, and the vibration detection assembly can also detect the vibration amplitude and direction of the valve body, so that workers are assisted in checking and repairing vibration reasons of the valve body; the locking assembly can disassemble and lock the connecting bolts at the corresponding positions and the connecting bolts at the symmetrical positions through the detection result of the vibration detection assembly on the connecting positions of the two ends of the valve body and the first connecting pipe and the second connecting pipe.

Description

Technical Field

[0001] The present application relates to the technical field of low-temperature stop valve vibration sensing detection, and in particular to a low-temperature stop valve vibration detection device and detection method. Background Art

[0002] Cryogenic stop valve is a valve specially designed to work in low temperature environment, and its working temperature is usually low. Cryogenic stop valve is widely used in cryogenic liquid medium systems such as liquefied natural gas (LNG), liquefied petroleum gas (LPG), liquid oxygen, liquid nitrogen, etc., to accurately control and cut off the flow of fluid. During operation, loose parts in the cryogenic stop valve or too high a medium flow rate may cause the valve to emit abnormal noise and obvious vibration, thus affecting its normal operation and even causing leakage risks. Therefore, it is necessary to detect the vibration of the cryogenic stop valve in a timely manner.

[0003] In the prior art, flange connections are generally used between the cryogenic shut-off valve and the pipes connected at both ends. In the prior art, vibration detection of the cryogenic shut-off valve is performed by simply installing a vibration sensor on the valve body. The vibration sensor detects the shaking of the valve body to determine whether the valve body is within a safe and usable range.

[0004] Regarding the above-mentioned related technologies, the internal structure of the cryogenic stop valve determines that there is liquid impact inside it. When the liquid flow rate is fast or lasts for a long time, the vibration generated by the liquid impact may cause the flange connection bolts between the two ends of the cryogenic stop valve and the connected pipes to loosen, thereby causing the risk of leakage. In addition, simply installing a vibration sensor cannot determine the vibration amplitude and direction of the cryogenic stop valve, so improvements are made to this end. Summary of the invention

[0005] In order to detect the possible leakage risks at the flange connections between the two ends of the cryogenic stop valve and the connected pipes, remove and reinstall the bolts at the risk locations and their symmetrical positions, and detect the vibration amplitude and vibration direction of the valve body, the present application provides a cryogenic stop valve vibration detection device and detection method.

[0006] The low-temperature stop valve vibration detection device provided in this application adopts the following technical solution: A vibration detection device for a low-temperature stop valve comprises a valve body, a first connecting pipe and a second connecting pipe, wherein the first connecting pipe and the second connecting pipe are respectively arranged at two ends of the valve body through flange connection, and two groups of vibration detection mechanisms are arranged on the valve body, and the two groups of vibration detection mechanisms are respectively arranged at two ends of the valve body and at the connection between the valve body and the first connecting pipe and the second connecting pipe. The vibration detection mechanism comprises a first mounting ring, a mounting seat and a vibration detection assembly, wherein the first mounting ring is arranged on the mounting seat, and the vibration detection assembly is arranged on the first mounting ring, and is used to detect the amplitude and direction of the valve body, and can also be used to detect whether there is a leakage risk in the flange connection between the valve body and the first connecting pipe and the second connecting pipe. A second mounting ring is also arranged on the first connecting pipe and the second connecting pipe, and a locking mechanism is arranged on the second mounting ring for re-tightening the bolts at the possible leakage point of the flange connection between the valve body and the first connecting pipe and the second connecting pipe, as well as the bolts at the symmetrical position thereof.

[0007] By adopting the above technical solution, flange bolts are generally used to connect the two ends of the valve body to the first connecting pipe and the second connecting pipe, and the internal structure of the low-temperature stop valve determines that there is liquid impact inside it. When the flow rate of the liquid is fast or lasts for a long time, the vibration generated by the liquid impact may cause the flange connection bolts between the two ends of the valve body and the first connecting pipe and the second connecting pipe to loosen, and the vibration generated by the installation position of the valve body may also cause the flange connection bolts to loosen, thereby causing the risk of leakage. However, the vibration detection component on the first mounting ring in the present application can detect the leakage risk at the connection between the two ends of the valve body and the first connecting pipe and the second connecting pipe, thereby assisting the staff to promptly detect potential leakage. The risk of leakage can be dealt with, and the vibration detection component in the present application can also detect the vibration amplitude and direction of the valve body, so as to further assist the staff in troubleshooting and repairing the cause of the vibration of the valve body, and the locking component can detect the detection results of the connection between the two ends of the valve body and the first connecting pipe and the second connecting pipe through the vibration detection component, and remove and re-tighten the connecting bolts at the corresponding positions and the connecting bolts at the symmetrical positions, so as to reduce the risk of leakage caused by the staff's failure to deal with it in time. Re-tightening the bolts at the positions where there may be leakage risks and the bolts at the symmetrical positions can avoid the problem of the flange connection being unable to seal due to unbalanced tightening of the diagonal bolts of the flange, thereby ensuring the tightness and stability of the flange connection.

[0008] Optionally, the vibration detection component includes a mounting ear plate, an infrared temperature sensor and an amplitude detection structure, the first mounting ring is sleeved on the flange of the valve body, and multiple groups of mounting ear plates and infrared temperature sensors are provided, multiple groups of mounting ear plates are spaced apart on the side wall of the first mounting ring, multiple groups of infrared temperature sensors are respectively provided on multiple groups of mounting ear plates, and the infrared temperature sensor is arranged to align with the connection between the valve body and the first connecting pipe and the second connecting pipe. When the connection between the valve body and the first connecting pipe and the second connecting pipe is loose due to vibration and may leak, the infrared temperature sensor can detect that the color of the connection where the leak is about to occur is darker, and the amplitude detection structure is provided on the first mounting ring, for detecting the vibration amplitude and direction of the valve body.

[0009] By adopting the above technical solution, when there is a risk of leakage at the connection between the valve body and the first connecting pipe and the second connecting pipe, the sealing distance between the valve body and the first connecting pipe and the second connecting pipe will increase. Since low-temperature liquid flows in the valve body, the temperature at the possible leakage location will become lower. At this time, the infrared temperature sensor installed on the mounting ear plate will detect the possible leakage risk through the temperature drop at the connection, thereby assisting the staff to deal with the potential leakage risk in a timely manner, and the amplitude detection structure can detect the vibration amplitude and direction of the valve body, thereby further assisting the staff to investigate and repair the cause of the vibration of the valve body.

[0010] Optionally, the amplitude detection structure includes a pressure sensor, a mounting frame, a fixed column, a telescopic column, a first spring and an abutment plate. The pressure sensors are provided in multiple groups, and the multiple groups of pressure sensors are embedded and arranged at intervals on the inner wall of the first mounting ring. The mounting frame is provided with multiple groups of pressure sensors, and the multiple groups of mounting frames are arranged at intervals on the inner wall of the first mounting ring. The fixed column is slidably arranged on the mounting frame, and a socket slot is provided on the fixed column. The telescopic column is socketed and arranged in the socket slot. The first spring is arranged in the socket slot and is arranged between the fixed column and the telescopic column. The abutment plate is arranged on an end of the telescopic column away from the fixed column. In an initial state, the abutment plate is fitted with two ends of the valve body, and the fixed column just abuts against the pressure sensor. When the valve body vibrates, the telescopic column will drive the first spring to squeeze the fixed column. The vibration amplitude of the valve body is judged by the abutment force between the fixed column and the pressure sensor, and the vibration direction is judged by the abutment between the multiple groups of fixed columns and the multiple groups of pressure sensors.

[0011] By adopting the above technical solution, when the valve body vibrates, the vibration of the valve body can cause the telescopic column to retract into the bearing slot through the abutment plate to squeeze the first spring. The deformation of the first spring can transmit the squeezing force to the fixed column, thereby changing the squeezing force between the fixed column and the pressure sensor. The vibration amplitude of the valve body can be known from the change in the squeezing force detected by the pressure sensor, and the vibration direction of the valve body can be known from the output values ​​of multiple groups of pressure sensors, thereby further assisting the staff to investigate and repair the cause of the vibration of the valve body.

[0012] Optionally, the locking mechanism includes a bolt head cover, a locking plate, a passive gear, a driving assembly and a reset structure, the bolt head cover is arranged on the bolt, a locking groove is opened on the bolt head cover, the passive gear is rotatably arranged on the second mounting ring, the locking plate is movably arranged on the passive gear, the driving assembly is used to drive the second mounting ring to approach or move away from the first mounting ring, and drive the second mounting ring to rotate forward and reversely, and the reset structure is used to make multiple groups of mutually symmetrical locking plates extend or retract the passive gear arrangement.

[0013] By adopting the above technical solution, the driving component drives the second mounting ring to approach the first mounting ring, and at the same time drives the second mounting ring to rotate forward until the locking plate on the passive gear enters the locking groove, and then drives the second mounting ring to rotate in the opposite direction, and the bolts are removed under the action of the locking plate and the locking groove. During the disassembly process, under the action of the reset structure, the locking plate is retracted into the passive gear until the disassembly is completed, and the reset structure can also make the multiple sets of mutually symmetrical locking plates extend out of the passive gear setting, thereby realizing the disassembly of multiple sets of mutually symmetrical bolts at the possible leakage risk. After the disassembly is completed, the second mounting ring is driven forward to rotate, thereby realizing the synchronous installation of multiple sets of mutually symmetrical bolts at the possible leakage risk, avoiding the problem of the flange connection being unable to be sealed due to the unbalanced locking of the diagonal bolts of the flange, thereby ensuring the tightness and stability of the flange connection.

[0014] Optionally, a driving assembly includes a fixed plate, an electric telescopic rod, a driving motor, an outer gear ring, an inner gear ring and a gear column, the fixed plate is arranged on a side of the second mounting ring away from the first mounting ring, the second mounting ring is slidably arranged on the first connecting tube and the second connecting tube, the fixed end of the electric telescopic rod is arranged on the fixed plate, the telescopic end of the electric telescopic rod passes through the fixed plate and is arranged on a side of the second mounting ring away from the first mounting ring, the outer gear ring is sleeved on the inner gear ring, and the inner gear ring and the outer gear ring are fixedly connected, the inner gear ring and the outer gear ring are both rotatably arranged on the second mounting ring, the driving motor is arranged on the fixed plate, and the output shaft passes through the fixed plate, the gear column is arranged on the output shaft of the driving motor, the gear column and the outer gear ring are meshed with each other, and in the length direction of the gear column, the outer gear ring and the gear column are slidably connected, and the passive gear and the inner gear ring are meshed with each other.

[0015] By adopting the above technical solution, the electric telescopic rod is started, and the telescopic end of the electric telescopic rod is extended to drive the second mounting ring to move in the direction of the first mounting ring, and the driving motor is started in the positive direction, and the tooth column on the output shaft of the driving motor drives the outer gear ring to rotate. Since the outer gear ring and the inner gear ring are fixedly connected, the inner gear ring can drive the rotation of the passive gear, thereby entering the locking groove through the locking plate on the passive gear, and then the driving motor is started in the reverse direction to disassemble the bolt. After the disassembly is completed, the driving motor is started in the positive direction to install the bolt.

[0016] Optionally, the reset structure includes a reset groove, an electromagnet and a second spring, the reset groove is opened on a surface of the passive gear away from the fixed plate, the locking plate is movably arranged in the reset groove, the electromagnet is arranged at the bottom of the reset groove, the second spring is arranged in the reset groove and between the electromagnet and the locking plate, and multiple groups of the electromagnets are respectively electrically connected to multiple groups of the infrared temperature sensors.

[0017] By adopting the above technical solution, the electromagnet is started, the electromagnet can adsorb the locking plate and completely retract it into the reset groove. At this time, the second spring is in a compressed state. After the electromagnet is closed, the locking plate can be extended from the reset groove under the action of the second spring. In the initial state, the electromagnet is in an open state. Since the electromagnet is electrically connected to the infrared temperature sensor, the multiple groups of electromagnets can be controlled by multiple groups of infrared temperature sensors. When the infrared temperature sensor detects that the temperature at the connection between the valve body and the first connecting pipe and the second connecting pipe decreases, the infrared temperature sensor and the infrared temperature sensor at a symmetrical position thereof can close the corresponding electromagnet to make the locking plate extend from the reset groove.

[0018] Optionally, the end of the locking groove close to the second mounting ring is arranged as an outwardly expanded inclined surface.

[0019] By adopting the above technical solution, the end of the socket slot close to the second mounting ring is provided with an outwardly expanded inclined surface, which can further facilitate the locking plate to enter the locking slot.

[0020] The present application also includes a low temperature stop valve vibration detection method, which includes the following steps: S1: The sealing distance between the valve body and the first connecting pipe and the second connecting pipe will increase, and the temperature at the possible leakage position will become lower. The infrared temperature sensor installed on the mounting ear plate will detect the possible leakage risk through the temperature drop at the connection; S2: The vibration of the valve body can change the extrusion force detected by the pressure sensor, so the vibration amplitude of the valve body can be known. The output values ​​of multiple groups of pressure sensors can be used to know the vibration direction of the valve body. S3: When the infrared temperature sensor detects that the temperature at the connection between the valve body and the first connecting pipe and the second connecting pipe decreases, the infrared temperature sensor and the infrared temperature sensor at the symmetrical position thereof can close the corresponding electromagnet to make the locking plate extend from the reset groove, and the locking plate enters the locking groove; S4: Start the drive motor in reverse direction to disassemble the bolts, and start the drive motor in forward direction after disassembly to install the bolts.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. When there is a risk of leakage at the connection between the valve body and the first connecting pipe and the second connecting pipe, the sealing distance between the valve body and the first connecting pipe and the second connecting pipe will increase. Since the valve body is filled with cryogenic liquid, the temperature at the possible leakage position will become lower. At this time, the infrared temperature sensor installed on the mounting ear plate will detect the possible leakage risk through the temperature drop at the connection, thereby assisting the staff to deal with the potential leakage risk in a timely manner; 2. When the valve body vibrates, the vibration of the valve body can cause the telescopic column to retract into the socket through the abutment plate to squeeze the spring. The deformation of the first spring can transmit the squeezing force to the fixed column, thereby changing the squeezing force between the fixed column and the pressure sensor. The magnitude of the vibration amplitude of the valve body can be known through the change of the squeezing force detected by the pressure sensor, and the vibration direction of the valve body can be known through the output values ​​of multiple groups of pressure sensors, thereby further assisting the staff to investigate and repair the cause of the vibration of the valve body; 3. The driving assembly drives the second mounting ring to approach the first mounting ring, and at the same time drives the second mounting ring to rotate forwardly until the locking plate on the passive gear enters the locking groove, and then drives the second mounting ring to rotate in the opposite direction, and the bolts are removed under the action of the locking plate and the locking groove. During the disassembly process, under the action of the reset structure, the locking plate is retracted into the passive gear until the disassembly is completed, and the reset structure can also make the multiple sets of mutually symmetrical locking plates extend out of the passive gear setting, thereby realizing the disassembly of multiple sets of mutually symmetrical bolts at the possible leakage risk. After the disassembly is completed, the second mounting ring is driven forward to rotate, thereby realizing the synchronous installation of multiple sets of mutually symmetrical bolts at the possible leakage risk, avoiding the problem of the flange connection being unable to be sealed due to the unbalanced locking of the diagonal bolts of the flange, and ensuring the tightness and stability of the flange connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ; Figure 3 yes Figure 2 An enlarged schematic diagram of the structure of part A; Figure 4 yes Figure 1 A partial structural diagram of Figure 5 yes Figure 4 Schematic cross-section of part of the structure.

[0024] 1. Valve body; 11. First connecting pipe; 12. Second connecting pipe; 2. First mounting ring; 3. Mounting seat; 4. Vibration detection assembly; 41. Mounting ear plate; 42. Infrared temperature sensor; 43. Amplitude detection structure; 431. Pressure sensor; 432. Mounting frame; 433. Fixed column; 434. Telescopic column; 435. First spring; 436. Abutment plate; 5. Second mounting ring; 6. Locking mechanism; 61. Bolt head cover; 62. Locking plate; 63. Passive gear; 64. Drive assembly; 641. Fixed plate; 642. Electric telescopic rod; 643. Drive motor; 644. Outer gear ring; 645. Inner gear ring; 646. Gear column; 65. Reset structure; 651. Reset groove; 652. Electromagnet; 653. Second spring. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-5 This application is described in further detail.

[0026] The present application discloses a low temperature stop valve vibration detection device and detection method, referring to Figure 1 and Figure 2 A vibration detection device for a low-temperature stop valve comprises a valve body 1, a first connecting pipe 11 and a second connecting pipe 12. The first connecting pipe 11 and the second connecting pipe 12 are respectively installed at both ends of the valve body 1 through flange connection. Two groups of vibration detection mechanisms are installed on the valve body 1. The two groups of vibration detection mechanisms are respectively installed at both ends of the valve body 1 and are installed at the connection between the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12. The vibration detection mechanism comprises a first mounting ring 2, a mounting seat 3 and a vibration detection assembly 4. The first mounting ring 2 is welded and installed on the mounting seat 3. A second mounting ring 5 is also installed on the first connecting pipe 11 and the second connecting pipe 12, and a locking mechanism 6 is installed on the second mounting ring 5.

[0027] The two ends of the valve body 1 are generally connected to the first connecting pipe 11 and the second connecting pipe 12 by flange bolts, and the internal structure of the low-temperature stop valve determines that there is liquid impact inside it. When the flow rate of the liquid is fast or lasts for a long time, the vibration generated by the liquid impact may cause the flange connection bolts between the two ends of the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12 to loosen, and the vibration generated by the installation position of the valve body 1 may also cause the flange connection bolts to loosen, thereby causing the risk of leakage. However, in this embodiment, the vibration detection component 4 on the first mounting ring 2 can detect the leakage risk at the connection between the two ends of the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12, thereby assisting the staff to timely detect potential leaks. The risk can be dealt with, and the vibration detection component 4 in this embodiment can also detect the vibration amplitude and direction of the valve body 1, so as to further assist the staff to investigate and repair the cause of the vibration of the valve body 1, and the locking component can detect the detection results of the connection between the two ends of the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12 through the vibration detection component 4, and remove and re-tighten the connecting bolts at the corresponding positions and the connecting bolts at the symmetrical positions, so as to reduce the leakage risk caused by the staff's failure to deal with it in time. Re-tightening the bolts at the position where there may be a leakage risk and the bolts at the symmetrical position can avoid the problem of the flange connection being unable to be sealed due to the unbalanced tightening of the diagonal bolts of the flange, thereby ensuring the tightness and stability of the flange connection.

[0028] Reference Figure 3The vibration detection assembly 4 in this embodiment includes a mounting ear plate 41, an infrared temperature sensor 42 and an amplitude detection structure 43. The first mounting ring 2 is sleeved on the flange of the valve body 1. The mounting ear plates 41 and the infrared temperature sensors 42 are provided in multiple groups. The multiple groups of mounting ear plates 41 are installed on the side wall of the first mounting ring 2 at intervals. The multiple groups of infrared temperature sensors 42 are respectively installed on the multiple groups of mounting ear plates 41. The infrared temperature sensors 42 are aligned with the connection between the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12. The amplitude detection structure 43 is installed on the first mounting ring 2. In this embodiment, there are eight groups of bolts installed on the flange, so the infrared temperature sensors 42 are installed in eight groups corresponding to the number of groups of bolts. Eight groups are a preferred method of this embodiment. In other embodiments, it can be adjusted according to actual needs.

[0029] When there is a risk of leakage at the connection between the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12, the sealing distance between the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12 will increase. Since low-temperature liquid flows in the valve body 1, the temperature at the possible leakage location will become lower. At this time, the infrared temperature sensor 42 installed on the mounting ear plate 41 will detect the possible leakage risk through the temperature reduction at the connection, thereby assisting the staff to deal with the potential leakage risk in time, and the amplitude detection structure 43 can detect the vibration amplitude and direction of the valve body 1, thereby further assisting the staff to investigate and repair the cause of the vibration of the valve body 1.

[0030] In order to further assist the staff to investigate and repair the cause of the vibration of valve body 1, refer to Figure 3 The amplitude detection structure 43 includes a pressure sensor 431, a mounting frame 432, a fixed column 433, a telescopic column 434, a first spring 435 and an abutment plate 436. The pressure sensor 431 is provided with multiple groups, and the multiple groups of pressure sensors 431 are embedded and installed at intervals on the inner wall of the first mounting ring 2. The mounting frame 432 is provided with multiple groups of pressure sensors 431, and the multiple groups of mounting frames 432 are installed at intervals on the inner wall of the first mounting ring 2. The fixed column 433 is slidably installed on the mounting frame 432, and a socket is provided on the fixed column 433. The telescopic column 434 The socket is installed in the socket slot, the first spring 435 is installed in the socket slot and is installed between the fixed column 433 and the telescopic column 434, the abutment plate 436 is installed on the end of the telescopic column 434 away from the fixed column 433. In the initial state, the abutment plate 436 fits with both ends of the valve body 1, and the fixed column 433 and the pressure sensor 431 just abut. In this embodiment, eight groups of pressure sensors 431 are installed. Eight groups of pressure sensors 431 are a preferred method of this embodiment. In other embodiments, it can be adjusted according to actual usage requirements.

[0031] When the valve body 1 vibrates, the vibration of the valve body 1 can cause the telescopic column 434 to retract into the socket through the abutment plate 436 to squeeze the first spring 435. The deformation of the first spring 435 can transmit the squeezing force to the fixed column 433, thereby changing the squeezing force between the fixed column 433 and the pressure sensor 431. The change in the squeezing force detected by the pressure sensor 431 can be used to determine the vibration amplitude of the valve body 1, and the vibration direction of the valve body 1 can be determined through the output values ​​of multiple groups of pressure sensors 431, thereby further assisting the staff in troubleshooting and repairing the cause of the vibration of the valve body 1.

[0032] Reference Figure 4 and Figure 5 The locking mechanism 6 includes a bolt head cover 61, a locking plate 62, a passive gear 63, a driving assembly 64 and a reset structure 65. The bolt head cover 61 is installed on the bolt, and a locking groove is provided on the bolt head cover 61. The passive gear 63 is rotatably installed on the second mounting ring 5. The locking plate 62 is movably installed on the passive gear 63. The end of the locking groove close to the second mounting ring 5 is set as an outward-expanding inclined surface.

[0033] The driving assembly 64 drives the second mounting ring 5 to approach the first mounting ring 2, and at the same time drives the second mounting ring 5 to rotate forwardly until the locking plate 62 on the passive gear 63 enters the locking groove, and then drives the second mounting ring 5 to rotate in the opposite direction, and the bolts are removed under the action of the locking plate 62 and the locking groove. During the disassembly process, under the action of the reset structure 65, the locking plate 62 is retracted into the passive gear 63 until the disassembly is completed, and the reset structure 65 can also make the mutually symmetrical multiple sets of locking plates 62 extend out of the passive gear 63, thereby realizing the disassembly of multiple sets of mutually symmetrical bolts at the possible leakage risk. After the disassembly is completed, the second mounting ring 5 is driven forward to rotate, thereby realizing the synchronous installation of multiple sets of mutually symmetrical bolts at the possible leakage risk, avoiding the problem that the flange connection cannot be sealed due to the unbalanced locking of the diagonal bolts of the flange, ensuring the tightness and stability of the flange connection, and the end of the socket close to the second mounting ring 5 is an outward-expanded inclined surface setting, which can further facilitate the locking plate 62 to enter the locking groove.

[0034] Reference Figure 1 and Figure 2The driving assembly 64 includes a fixing plate 641, an electric telescopic rod 642, a driving motor 643, an outer gear ring 644, an inner gear ring 645 and a gear column 646. The fixing plate 641 is installed on the side of the second mounting ring 5 away from the first mounting ring 2. The second mounting ring 5 is slidably installed on the first connecting tube 11 and the second connecting tube 12. The fixed end of the electric telescopic rod 642 is installed on the fixing plate 641. The telescopic end of the electric telescopic rod 642 passes through the fixing plate 641 and is installed on the side of the second mounting ring 5 away from the first mounting ring 2. The outer gear ring 644 It is sleeved on the inner gear ring 645, and the inner gear ring 645 and the outer gear ring 644 are fixedly connected. The inner gear ring 645 and the outer gear ring 644 are both rotatably mounted on the second mounting ring 5. The driving motor 643 is mounted on the fixed plate 641, and the output shaft passes through the fixed plate 641. The gear column 646 is mounted on the output shaft of the driving motor 643. The gear column 646 and the outer gear ring 644 are meshed with each other, and in the length direction of the gear column 646, the outer gear ring 644 and the gear column 646 are slidably connected, and the driven gear 63 is meshed with the inner gear ring 645.

[0035] Start the electric telescopic rod 642, the telescopic end of the electric telescopic rod 642 extends to drive the second mounting ring 5 to move in the direction of the first mounting ring 2, and start the driving motor 643 in the forward direction. The tooth column 646 on the output shaft of the driving motor 643 drives the outer gear ring 644 to rotate. Since the outer gear ring 644 and the inner gear ring 645 are fixedly connected, the inner gear ring 645 can drive the driven gear 63 to rotate, so that the locking plate 62 on the driven gear 63 enters the locking groove, and then the driving motor 643 is started in the reverse direction to disassemble the bolt. After the disassembly is completed, the driving motor 643 is started in the forward direction to install the bolt.

[0036] Reference Figure 5 The reset structure 65 includes a reset groove 651, an electromagnet 652 and a second spring 653. The reset groove 651 is opened on the side of the passive gear 63 away from the fixed plate 641. The locking plate 62 is movably installed in the reset groove 651. The electromagnet 652 is installed at the bottom of the reset groove 651. The second spring 653 is installed in the reset groove 651 and is installed between the electromagnet 652 and the locking plate 62. Multiple groups of electromagnets 652 are electrically connected to multiple groups of infrared temperature sensors 42 respectively.

[0037] When the electromagnet 652 is started, the electromagnet 652 can adsorb the locking plate 62 and completely retract it into the reset groove 651. At this time, the second spring 653 is in a compressed state. After the electromagnet 652 is closed, the locking plate 62 can be extended from the reset groove 651 under the action of the second spring 653. In the initial state, the electromagnet 652 is in an open state. Since the electromagnet 652 is electrically connected to the infrared temperature sensor 42, the multiple groups of electromagnets 652 can be controlled by multiple groups of infrared temperature sensors 42. When the infrared temperature sensor 42 detects that the temperature at the connection between the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12 is reduced, the infrared temperature sensor 42 and the infrared temperature sensor 42 at the symmetrical position can close the corresponding electromagnet 652 to make the locking plate 62 extend from the reset groove 651.

[0038] The implementation principle of the low-temperature stop valve vibration detection device in the embodiment of the present application is: When there is a risk of leakage at the connection between the valve body 1 and the first connecting pipe 11, the second connecting pipe 12, the sealing distance between the valve body 1 and the first connecting pipe 11, the second connecting pipe 12 will increase. Since low-temperature liquid flows in the valve body 1, the temperature at the possible leakage location will become lower. At this time, the infrared temperature sensor 42 installed on the mounting ear plate 41 will detect the possible leakage risk through the temperature drop at the connection, thereby assisting the staff to deal with the potential leakage risk in a timely manner.

[0039] When the valve body 1 vibrates, the vibration of the valve body 1 can cause the telescopic column 434 to retract into the socket through the abutment plate 436 to squeeze the first spring 435. The deformation of the first spring 435 can transmit the squeezing force to the fixed column 433, thereby changing the squeezing force between the fixed column 433 and the pressure sensor 431. The change in the squeezing force detected by the pressure sensor 431 can be used to determine the vibration amplitude of the valve body 1, and the vibration direction of the valve body 1 can be determined through the output values ​​of multiple groups of pressure sensors 431, thereby further assisting the staff in troubleshooting and repairing the cause of the vibration of the valve body 1.

[0040] When it is necessary to re-tighten the bolts on the flange, the electromagnet 652 is turned off. Under the action of the second spring 653, the locking plate 62 can extend from the reset groove 651. Therefore, the multiple groups of electromagnets 652 can be controlled by multiple groups of infrared temperature sensors 42. When the infrared temperature sensor 42 detects that the temperature at the connection between the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12 decreases, the infrared temperature sensor 42 and the infrared temperature sensor 42 at the symmetrical position can turn off the corresponding electromagnet 652 to make the locking plate 62 extend from the reset groove 651, start the electric telescopic rod 642, and the electric The telescopic end of the movable telescopic rod 642 extends to drive the second mounting ring 5 to move in the direction of the first mounting ring 2, and the driving motor 643 is started in the forward direction. The tooth column 646 on the output shaft of the driving motor 643 drives the outer gear ring 644 to rotate. Since the outer gear ring 644 and the inner gear ring 645 are fixedly connected, the inner gear ring 645 can drive the driven gear 63 to rotate, so that the locking plate 62 on the driven gear 63 enters the locking groove, and then the driving motor 643 is started in the reverse direction to disassemble the bolt. After the disassembly is completed, the driving motor 643 is started in the forward direction to install the bolt.

[0041] The present application also includes a low temperature stop valve vibration detection method, which includes the following steps: S1: The sealing distance between the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12 will increase, and the temperature at the possible leakage position will become lower. The infrared temperature sensor 42 installed on the mounting ear plate 41 will detect the possible leakage risk through the temperature drop at the connection; S2: The vibration of the valve body 1 can change the squeezing force detected by the pressure sensor 431, so that the vibration amplitude of the valve body 1 can be known. The output values ​​of multiple groups of pressure sensors 431 can be used to know the vibration direction of the valve body 1; S3: When the infrared temperature sensor 42 detects that the temperature at the connection between the valve body 1 and the first connecting pipe 11 and the second connecting pipe 12 is reduced, the infrared temperature sensor 42 and the infrared temperature sensor 42 at the symmetrical position can close the corresponding electromagnet 652 to make the locking plate 62 extend from the reset groove 651, and the locking plate 62 enters the locking groove; S4: Start the drive motor 643 in reverse direction to disassemble the bolts, and start the drive motor 643 in forward direction after disassembly, so as to install the bolts.

[0042] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate the existence of at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low-temperature stop valve vibration detection device, comprising a valve body (1), a first connecting pipe (11) and a second connecting pipe (12), characterized in that: The first connecting pipe (11) and the second connecting pipe (12) are respectively arranged at two ends of the valve body (1) through flange connection. The valve body (1) is provided with two sets of vibration detection mechanisms. The two sets of vibration detection mechanisms are respectively arranged at two ends of the valve body (1) and at the connection between the valve body (1) and the first connecting pipe (11) and the second connecting pipe (12). The vibration detection mechanism comprises a first mounting ring (2), a mounting seat (3) and a vibration detection component (4). The first mounting ring (2) is arranged on the mounting seat (3). The vibration detection component (4) is arranged on the first mounting ring (2). The mounting ring (2) is used to detect the amplitude and direction of the valve body (1), and can also be used to detect whether there is a risk of leakage in the flange connection between the valve body (1) and the first connecting pipe (11) and the second connecting pipe (12). The first connecting pipe (11) and the second connecting pipe (12) are also provided with a second mounting ring (5). The second mounting ring (5) is provided with a locking mechanism (6) for re-tightening the bolts at the possible leakage point of the flange connection between the valve body (1) and the first connecting pipe (11) and the second connecting pipe (12) and the bolts at the symmetrical position thereof.

2. The low-temperature stop valve vibration detection device according to claim 1, characterized in that: The vibration detection assembly (4) comprises a mounting ear plate (41), an infrared temperature sensor (42) and an amplitude detection structure (43); the first mounting ring (2) is sleeved on a flange of the valve body (1); a plurality of mounting ear plates (41) and the infrared temperature sensor (42) are provided; the plurality of mounting ear plates (41) are arranged at intervals on the side wall of the first mounting ring (2); the plurality of infrared temperature sensors (42) are respectively arranged on the plurality of mounting ear plates (41); and the infrared temperature sensors ( The infrared temperature sensor (42) is aligned with the connection between the valve body (1) and the first connecting pipe (11) and the second connecting pipe (12). When the connection between the valve body (1) and the first connecting pipe (11) and the second connecting pipe (12) is loosened due to vibration and may leak, the infrared temperature sensor (42) can detect that the color of the place where the connection is about to leak is darker. The amplitude detection structure (43) is arranged on the first mounting ring (2) and is used to detect the vibration amplitude and direction of the valve body (1).

3. The low temperature stop valve vibration detection device according to claim 2, characterized in that: The amplitude detection structure (43) comprises a pressure sensor (431), a mounting frame (432), a fixed column (433), a telescopic column (434), a first spring (435) and an abutment plate (436); the pressure sensor (431) is provided in multiple groups, and the multiple groups of the pressure sensors (431) are embedded and arranged at intervals on the inner wall of the first mounting ring (2); the mounting frame (432) and the pressure sensor (431) are provided in multiple groups, and the multiple groups of the mounting frames (432) are arranged at intervals on the inner wall of the first mounting ring (2); the fixed column (433) is slidably arranged on the mounting frame (432); a socket slot is provided on the fixed column (433); the telescopic column (434) is socket-inserted in the socket slot; the first spring (435) is arranged in the socket slot. The valve body (1) is provided with a plurality of support members (434) and a plurality of support members (435) arranged in a groove and arranged between the fixed column (433) and the telescopic column (434); the abutment plate (436) is arranged on one end of the telescopic column (434) away from the fixed column (433); in an initial state, the abutment plate (436) fits with both ends of the valve body (1); the fixed column (433) and the pressure sensor (431) just abut against each other; when the valve body (1) vibrates, the telescopic column (434) is driven to press the fixed column (433) through the first spring (435); the vibration amplitude of the valve body (1) is determined by the abutment force between the fixed column (433) and the pressure sensor (431); and the vibration direction is determined by the abutment between multiple groups of the fixed columns (433) and multiple groups of the pressure sensors (431).

4. The low temperature stop valve vibration detection device according to claim 2, characterized in that: The locking mechanism (6) comprises a bolt head cover (61), a locking plate (62), a passive gear (63), a driving assembly (64) and a reset structure (65); the bolt head cover (61) is arranged on the bolt; a locking groove is provided on the bolt head cover (61); the passive gear (63) is rotatably arranged on the second mounting ring (5); the locking plate (62) is movably arranged on the passive gear (63); the driving assembly (64) is used to drive the second mounting ring (5) to move closer to or away from the first mounting ring (2), and to drive the second mounting ring (5) to rotate in the forward and reverse directions; and the reset structure (65) is used to enable a plurality of mutually symmetrical groups of the locking plates (62) to extend or retract the passive gear (63).

5. The low temperature stop valve vibration detection device according to claim 4, characterized in that: The driving assembly (64) comprises a fixing plate (641), an electric telescopic rod (642), a driving motor (643), an outer gear ring (644), an inner gear ring (645) and a gear column (646); the fixing plate (641) is arranged on a side of the second mounting ring (5) away from the first mounting ring (2); the second mounting ring (5) is slidably arranged on the first connecting tube (11) and the second connecting tube (12); the fixing end of the electric telescopic rod (642) is arranged on the fixing plate (641); the telescopic end of the electric telescopic rod (642) passes through the fixing plate (641) and is arranged on a side of the second mounting ring (5) away from the first mounting ring (2); the outer gear ring (644) is sleeved on the fixing plate (641); The inner gear ring (645) is mounted on the inner gear ring (645), and the inner gear ring (645) and the outer gear ring (644) are fixedly connected. The inner gear ring (645) and the outer gear ring (644) are both rotatably arranged on the second mounting ring (5). The driving motor (643) is arranged on the fixing plate (641), and the output shaft passes through the fixing plate (641). The gear column (646) is arranged on the output shaft of the driving motor (643). The gear column (646) and the outer gear ring (644) are meshed with each other. In the length direction of the gear column (646), the outer gear ring (644) and the gear column (646) are slidably connected. The driven gear (63) and the inner gear ring (645) are meshed with each other.

6. The low temperature stop valve vibration detection device according to claim 5, characterized in that: The reset structure (65) comprises a reset groove (651), an electromagnet (652) and a second spring (653); the reset groove (651) is formed on a surface of the driven gear (63) away from the fixed plate (641); the locking plate (62) is movably arranged in the reset groove (651); the electromagnet (652) is arranged at the bottom of the reset groove (651); the second spring (653) is arranged in the reset groove (651) and between the electromagnet (652) and the locking plate (62); and a plurality of groups of the electromagnets (652) are electrically connected to a plurality of groups of the infrared temperature measuring sensors (42).

7. The low temperature stop valve vibration detection device according to claim 4, characterized in that: The end of the locking groove close to the second mounting ring (5) is arranged as an outwardly expanding inclined surface.

8. A method for detecting vibration of a cryogenic stop valve, according to a device for detecting vibration of a cryogenic stop valve according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: The sealing distance between the valve body (1) and the first connecting pipe (11) and the second connecting pipe (12) will increase, and the temperature at the location where leakage may occur will decrease. The infrared temperature sensor (42) installed on the mounting ear plate (41) will detect the possible leakage risk through the temperature drop at the connection; S2: The vibration of the valve body (1) can cause the squeezing force detected by the pressure sensor (431) to change, so that the magnitude of the vibration amplitude of the valve body (1) can be known. The output values ​​of the multiple groups of pressure sensors (431) can be used to know the vibration direction of the valve body (1); S3: When the infrared temperature sensor (42) detects that the temperature at the connection between the valve body (1) and the first connecting pipe (11) and the second connecting pipe (12) decreases, the infrared temperature sensor (42) and the infrared temperature sensors (42) at symmetrical positions thereof can turn off the corresponding electromagnets (652) to cause the locking plate (62) to extend from the reset groove (651), and the locking plate (62) to enter the locking groove; S4: The drive motor (643) is started in the reverse direction to dismantle the bolt, and after the dismantling is completed, the drive motor (643) is started in the forward direction to install the bolt.

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