Insulation loose joint replacing device without fuel gas transmission interruption and using method thereof

Abstract

The invention belongs to the technical field of fuel gas pipelines, and discloses a fuel gas non-transmission-stopping loose joint replacement device which comprises a left vertical pipe and a right vertical pipe which are connected to a fuel gas main pipeline and used for supplying gas to a community unit, an upper ventilation opening of a three-way connector on the left vertical pipe is connected with a device A, and an upper ventilation opening of a three-way connector on the right vertical pipe is connected with a device B; and a steel wire hose is arranged between the device A and the device B for communication.

Description

Technical Field

[0001] The invention relates to the technical field of gas pipelines, and in particular to a device for replacing insulating joints without interrupting gas transmission and a method of using the same. Background Art

[0002] In the existing gas pipeline route in the community, gas is transmitted to the residents of each unit in the community through the riser connected to the main gas pipeline. Figure 3 As shown, from bottom to top, a ball valve, a flexible joint and a tee are arranged in sequence, and the gas is transmitted to the user pipeline through the side vent of the tee. Among them, the existing flexible joints are mostly metal structures. Due to the long installation time, the insulation effect of the previously installed flexible joints has deteriorated and needs to be replaced in time. When replacing, the ball valve on the riser needs to be closed, and then the flexible joint is replaced. During the replacement process, gas cannot be supplied to residents, affecting the normal use of gas by residents. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a device for replacing insulating joints without stopping the transmission of gas and a method of using the device. An auxiliary pipe is used to respectively connect the risers of two different units, and the two auxiliary pipes are connected by a pipeline to complete the series connection between the gas pipelines of the two units. The insulating joints can be replaced without stopping the transmission of gas, and the normal gas use of residents will not be affected. Moreover, the isolation and replacement of the joints at both ends of the two risers can be completed in one installation, which is conducive to improving work efficiency.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A gas non-stop transmission and replacement insulation joint device comprises a left riser and a right riser connected to a gas main pipeline for supplying gas to a residential unit, wherein the upper air vent of the three-way joint on the left riser is connected to a device A, and the upper air vent of the three-way joint on the right riser is connected to a device B, and a steel wire hose is provided between the devices A and B for communication.

[0006] Preferably, the device A and the device B both include an adjustable structure, one side of the adjustable structure of the device A is connected to the side pipeline A, one side of the adjustable structure of the device B is connected to the side pipeline B, and the steel wire hose connects the side pipeline A and the side pipeline B.

[0007] Preferably, the adjustable structure includes a tube body, the upper end of the tube body is set as a sealed cavity, a rotating shaft is provided in the tube body, the lower end of the rotating shaft extends out of the tube body and is connected to a lower plug, the upper end of the rotating shaft passes through the sealed cavity and extends out of the tube body and is connected to a rotating head for driving the rotation of the rotating shaft, and a threaded connection is set between the rotating shaft and the sealed cavity.

[0008] Preferably, the lower end of the tube body is provided with an external thread connected to the corresponding three-way joint, the side pipeline A is communicated with the tube body below the corresponding sealed cavity, the side pipeline B is communicated with the tube body below the corresponding sealed cavity, the lower plug of the device A extends into the three-way joint of the left vertical pipe, and the lower plug of the device B extends into the three-way joint of the right vertical pipe.

[0009] Preferably, the side pipeline A includes an elbow fixedly mounted on the corresponding pipe body, the elbow is connected to a butterfly handle ball valve, the butterfly handle ball valve is connected to a reducer, and the large diameter end of the reducer is connected to a large diameter quick connect joint.

[0010] Preferably, the side pipeline B includes an elbow fixedly installed on the corresponding pipe body, the elbow is connected to two butterfly handle ball valves in sequence, a small-diameter quick-connect joint is provided between the two butterfly handle ball valves, the butterfly handle ball valve away from the elbow is connected to an auxiliary tee, the vertical air vent of the auxiliary tee is connected to a copper ball valve, the copper ball valve is connected to a pressure gauge, the other air vent of the auxiliary tee is connected to a reducer, and the large-diameter end of the reducer is connected to a large-diameter quick-connect joint.

[0011] Preferably, both ends of the steel wire hose are connected to the large-diameter quick-connect connectors of the side pipeline A and the side pipeline B respectively.

[0012] Preferably, the lower plug is configured as a silicone sealing ring, the silicone sealing ring is sleeved on the lower end of the rotating shaft, and a fixing nut is threadedly installed on the lower end of the rotating shaft for fixing the silicone sealing ring.

[0013] Preferably, the sealing cavity includes a bearing and a stopper fixedly mounted in the tube body, the stopper is located below the bearing, two sets of oil seals are mounted on the inner wall of the tube body below the bearing, and a threaded connection is provided between the stopper and the rotating shaft.

[0014] Preferably, a scale line for marking the position of the lower plug is provided at the upper end of the rotating shaft.

[0015] A method for replacing an insulating joint device without stopping gas transmission comprises the following steps:

[0016] Step 1, installation of device A and device B: remove the plug of the left riser, quickly insert the silicone seal ring of device A into the left riser, and then tighten the upper vent of the three-way joint between device A and the left riser until there is no air leakage. Connect device B to the right riser in the same way, and then connect the steel hose to device A, open all valves on device A, exhaust the air in the hose through the natural gas flow, connect the steel hose to device B after exhausting, and open all valves on device B, rotate the shaft according to the engraved lines on device A, close the lower vent of the three-way joint of the right riser through the silicone seal ring, and keep the left riser ball valve open, thereby realizing dual-way ventilation of the left riser-related users and the right riser-related users through the gas source of the left riser;

[0017] Step 2, dismantle the original insulating joint: start to replace the insulating joint. If necessary, fix the pipeline and other pipeline parts with pipe clamps to keep them still. Rotate and remove the original insulating joint on the right vertical pipe, and then clean the raw tape at the connection.

[0018] Step 3, install a new insulating joint: the original insulating joint should be completely removed, the right vertical pipe connection above the joint should be wrapped with raw tape counterclockwise, the right vertical pipe connection below the joint should be wrapped with raw tape clockwise, and then the new insulating joint should be installed on the right vertical pipe;

[0019] Step 4, replace the insulating joint of the other end of the riser: After the insulating joint of the right riser is replaced, open the ball valve of the right riser, rotate the shaft on the right riser according to the engraved position to move the silicone sealing ring upward to achieve the connection between the right riser and device B, then rotate the shaft on the left riser according to the engraved position to move the silicone sealing ring downward to achieve the blocking of the left riser and device A, and then close the ball valve of the left riser, thereby achieving two-way ventilation of the right riser-related users and the left riser-related users through the gas source of the right riser, and then repeat the operations in steps 2 and 3 to replace the insulating joint on the left riser;

[0020] Step 5, device removal: After replacing the insulating joints of the left and right risers, open the riser valve of the left riser. At this time, the riser valves of the left and right risers should be in the open state. Adjust the silicone sealing rings of device A and device B to the state of blocking the vents on the corresponding three-way joints. Close all valves on device A and device B, remove the quick connector, and disconnect device A and device B from the steel wire hose respectively; the following removal of device A and device B needs to be quick. Rotate the main body of device A and device B counterclockwise until the device threads are completely exposed. At the moment of pulling out the piston, install the threads until the threads are firmly connected to the riser.

[0021] Step 6. After replacing the insulating joint removal device, remove the excess raw tape at the threaded parts and insulating joints, re-spray the riser with silver paint, and clean up the work traces.

[0022] Preferably, if the right riser portion above the movable joint is stuck and difficult to remove during disassembly in step 2, the vertical air outlet of the right riser three-way joint is lifted by a lifting device.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. In the present invention, device A and device B are connected through a steel wire hose, so that the gas source of one of the risers of two different units can be simultaneously supplied to the associated users of the two units, and the series connection between the gas pipelines of the two units can be completed. The alternating replacement of the joints in the riser can be realized, and the replacement of the insulating joints can be completed without interrupting the gas transmission, without affecting the normal gas use of residents;

[0025] 2. In the present invention, the position of the silicone seal ring in the riser can be controlled by rotating the shaft through the cooperation between the shaft and the block, so that the gas flow direction between the two auxiliary pipes can be changed. The two ends of the joints on the two risers can be separated and replaced in one installation, which is simple to operate and is conducive to improving work efficiency.

[0026] 3. In the present invention, the device A and the device B are connected by a steel hose, which is easy to wind and has the advantages of simple operation and convenient carrying. The steel hose is matched with the reducer. When the gas enters the steel hose, the inner diameter becomes larger, which can effectively reduce the pressure of the gas on the steel hose, and avoid damage to the steel hose due to excessive gas pressure;

[0027] 4. In the present invention, the steel wire hose and the reducer are connected by a large-diameter quick-connect joint, which can realize the quick disassembly and assembly of the steel wire hose and the side pipeline A and the side pipeline B respectively, and the device A, the device B and the steel wire hose can be separately disassembled and assembled, which can reduce the difficulty of disassembly and assembly;

[0028] 5. In the present invention, two butterfly handle ball valves are connected in sequence between the elbow of the side pipeline B and the auxiliary tee, and the two butterfly handle balls are connected by a small-diameter quick-connect joint. When the steel hose is used for ventilation testing, the two butterfly handle ball valves can be closed and the small-diameter quick-connect joint can be opened to place the steel hose and the fully connected standpipe in the same place, so that one person can complete the test;

[0029] 6. In the present invention, a design of adding engraved lines on the rotating shaft is used to mark the position of the silicone sealing ring, so that the opening and closing of the tee in the corresponding vertical pipe is clearer and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of a gas non-stop transmission insulation joint replacement device of the present invention;

[0031] Figure 2 for Figure 1 A partial enlarged view of the

[0032] Figure 3 Schematic diagram of the original riser structure.

[0033] In the figure: 101-left vertical pipe, 102-right vertical pipe, 2-ball valve, 3-slip joint, 4-tee joint, 5-tube body, 6-rotating shaft, 7-swivel head, 8-stopper, 9-steel hose, 10-reducing pipe, 11-large diameter quick connect joint, 12-copper ball valve, 13-pressure gauge, 14-butterfly handle ball valve, 15-small diameter quick connect joint, 16-silicone sealing ring. DETAILED DESCRIPTION

[0034] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0035] like Figure 1-2 The device shown is an insulating joint replacement device for gas without interruption, comprising a left riser 101 and a right riser 102 connected to a gas main pipeline for supplying gas to a residential unit, the upper air vent of the three-way joint 4 on the left riser 101 is connected to a device A, and the upper air vent of the three-way joint 4 on the right riser 102 is connected to a device B. A steel wire hose 9 is provided between the devices A and B for communication. The steel wire hose 9 is convenient for winding, and has the advantages of simple operation and convenient carrying. The devices A and B are connected through the steel wire hose 9, so that the gas source of one of the risers of two different units can be supplied to the associated users of the two units at the same time, completing the series connection between the gas pipelines of the two units, and realizing the alternating replacement of the joints 3 in the risers, completing the replacement of the insulating joints without interruption of gas transmission, and not affecting the normal gas use of residents.

[0036] Both the device A and the device B include an adjustable structure, one side of the adjustable structure of the device A is connected to the side pipeline A, and one side of the adjustable structure of the device B is connected to the side pipeline B, and the steel wire hose 9 connects the side pipeline A with the side pipeline B; the adjustable structure includes a pipe body 5, the upper end of the pipe body 5 is set as a sealed cavity, a rotating shaft 6 is arranged in the pipe body 5, the lower end of the rotating shaft 6 extends out of the pipe body 5 and is connected to a lower plug, the upper end of the rotating shaft 6 passes through the sealed cavity and extends out of the pipe body 5 and is connected to a rotating head 7 for driving the rotation of the rotating shaft 6, a threaded connection is set between the rotating shaft 6 and the sealed cavity, the position of the lower plug in the riser can be controlled by rotating the rotating shaft 6, and the change of the gas flow direction between the two auxiliary pipes can be realized, and the partition and replacement of the two ends of the live joints 3 on the two risers can be completed by one installation, the operation is simple, and it is conducive to improving work efficiency.

[0037] The lower end of the tube body 5 is provided with an external thread connected to the corresponding three-way joint 4, the side pipeline A is communicated with the tube body 5 below the corresponding sealing cavity, and the side pipeline B is communicated with the tube body 5 below the corresponding sealing cavity. The lower plug of the device A extends into the three-way joint 4 of the left vertical pipe 101, and the lower plug of the device B extends into the three-way joint 4 of the right vertical pipe 102. The lower plug is set as a silicone sealing ring 16, and the silicone sealing ring 16 is sleeved on the lower end of the rotating shaft 6. A fixing nut is threadedly installed on the lower end of the rotating shaft 6 for fixing the silicone sealing ring 16. The nut is used for fixing. When the silicone sealing ring 16 is damaged, it can be replaced in time to ensure the sealing effect of the lower plug.

[0038] The side pipeline A includes an elbow fixedly mounted on the corresponding pipe body 5, the elbow is connected to a butterfly handle ball valve 14, the butterfly handle ball valve 14 is connected to a reducer 10, and the large diameter end of the reducer 10 is connected to a large diameter quick connector 11;

[0039] The side pipeline B includes an elbow fixedly installed on the corresponding pipe body 5, and the elbow is connected to two butterfly handle ball valves 14 in sequence. A small-diameter quick-connect joint 15 is provided between the two butterfly handle ball valves 14, and the butterfly handle ball valve 14 away from the elbow is connected to an auxiliary tee, and the vertical vent of the auxiliary tee is connected to a copper ball valve 12, and the copper ball valve 12 is connected to a pressure gauge 13. The pressure gauge 13 can be used to detect the connection between the device A and the device B after the steel wire hose 9 is connected to ensure that there is no gas leakage problem. The other vent of the auxiliary tee is connected to a reducer 10, and the large-diameter end of the reducer 10 is connected to a large-diameter quick-connect joint 11;

[0040] At the same time, the two butterfly handle ball valves 14 are connected by a small-diameter quick-connect joint 15. When the steel hose 9 is used for ventilation detection, the two butterfly handle ball valves 14 can be closed and the small-diameter quick-connect joint 15 can be opened. The steel hose 9 and the fully connected vertical pipe are placed at the same end. When a gas leak occurs, the gas can be cut off in time. One person can complete the detection. After the detection is completed, the small-diameter quick-connect joint 15 can be quickly installed on another vertical pipe;

[0041] The inner diameter of the large diameter quick-connect joint 11 is the same as the inner diameter of the steel hose 9 and the inner diameter of the large diameter end of the reducer 10, all of which are set to 25 mm, and the inner diameter of the small diameter end of the elbow and reducer 10 and the small diameter quick-connect joint 15 are all set to 15 mm.

[0042] The two ends of the steel wire hose 9 are respectively connected to the large-diameter quick-connect joints 11 of the side pipeline A and the side pipeline B. Both ends of the steel wire hose 9 are matched with the reducer 10. When the gas enters the steel wire hose 9, the inner diameter becomes larger, which can effectively reduce the pressure of the gas on the steel wire hose 9, and can avoid damage to the steel wire hose 9 caused by excessive gas pressure. At the same time, the steel wire hose 9 and the reducer 10 are connected by a large-diameter quick-connect joint 11, which can realize the quick disassembly and assembly of the steel wire hose 9 and the side pipeline A and the side pipeline B respectively. The device A, the device B and the steel wire hose 9 can be disassembled and assembled separately, which can reduce the difficulty of disassembly and assembly.

[0043] The sealing cavity includes a bearing and a stopper 8 fixedly installed in the tube body 5. The stopper 8 is located below the bearing. Two sets of oil seals are installed on the inner wall of the tube body 5 below the bearing. The stopper 8 and the rotating shaft 6 are threadedly connected.

[0044] The upper end of the rotating shaft 6 is provided with a plurality of engraved lines for marking the position of the lower plug.

[0045] A method for replacing an insulating joint device without stopping gas transmission comprises the following steps:

[0046] Step 1, installation of device A and device B: remove the plug of the left standpipe 101, quickly insert the silicone seal ring 16 of device A into the left standpipe 101, and then tighten the upper vent of the three-way joint 4 between device A and the left standpipe 101 until there is no air leakage. Connect device B to the right standpipe 102 in the same way, and then connect the steel hose 9 to device A, open all valves on device A, exhaust the air in the steel hose 9 through the natural gas flow, connect the steel hose 9 to device B after exhausting, and open all valves on device B, rotate the shaft 6 according to the engraved lines on device A, close the lower vent of the three-way joint 4 of the right standpipe 102 through the silicone seal ring 16, and keep the ball valve 2 of the left standpipe 101 open, thereby realizing dual-way ventilation of the left standpipe 101-related users and the right standpipe 102-related users through the gas source of the left standpipe 101;

[0047] Step 2, dismantle the original insulating joint: start to replace the insulating joint, fix the pipeline and other pipeline parts with pipe clamps to keep them still when necessary, rotate and remove the original insulating joint on the right vertical pipe 102, and then clean the raw tape at the connection;

[0048] Step 3, install a new insulating joint: the original insulating joint should be completely removed, the connection of the right vertical pipe 102 above the joint 3 should be wrapped with raw tape counterclockwise, the connection of the right vertical pipe 102 below the joint 3 should be wrapped with raw tape clockwise, and then the new insulating joint should be installed on the right vertical pipe 102;

[0049] Step 4, replace the insulating joint of the other end of the riser: After the insulating joint of the right riser 102 is replaced, open the ball valve 2 of the right riser 102, rotate the rotating shaft 6 on the right riser 102 according to the engraved position to move the silicone sealing ring 16 upward to achieve the connection between the right riser 102 and the device B, then rotate the rotating shaft 6 on the left riser 101 according to the engraved position to move the silicone sealing ring 16 downward to achieve the blocking of the left riser 101 and the device A, and then close the ball valve 2 of the left riser 101, thereby achieving two-way ventilation of the right riser 102-related users and the left riser 101-related users through the gas source of the right riser 102, and then repeat the operations in steps 2 and 3 to replace the insulating joint on the left riser 101;

[0050] Step 5, device removal: After the insulating joints of the left riser 101 and the right riser 102 are replaced, the riser valve of the left riser 101 is opened. At this time, the riser valves of the left and right risers 102 should be in the open state. The silicone seal rings 16 of the devices A and B are adjusted to the state of blocking the corresponding vents on the three-way joints 4. All valves on the devices A and B are closed, the quick connectors are removed, and the connections between the devices A and B and the steel hose 9 are disconnected. The following removal of the devices A and B needs to be quick. The main bodies of the devices A and B are rotated counterclockwise until the threads of the devices are completely exposed. At the moment when the piston is pulled out, the threads are installed until the threads are firmly connected to the riser.

[0051] Step 6. After replacing the insulating joint removal device, remove the excess raw tape at the threaded parts and insulating joints, re-spray the riser with silver paint, and clean up the work traces.

[0052] If the right vertical pipe 102 above the movable joint 3 is stuck and difficult to remove during disassembly in step 2, the vertical air outlet of the three-way joint 4 of the right vertical pipe 102 is lifted by a lifting device.

[0053] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A gas transmission and replacement insulation joint device, characterized in that: It includes a left riser and a right riser connected to the gas main pipeline for supplying gas to the residential unit. The upper air vent of the three-way joint on the left riser is connected to a device A, and the upper air vent of the three-way joint on the right riser is connected to a device B. A steel wire hose is provided between the devices A and B.

2. The insulating joint device for replacing gas without stopping transmission according to claim 1 is characterized in that: Both device A and device B include an adjustable structure. One side of the adjustable structure of device A is connected to side pipeline A, and one side of the adjustable structure of device B is connected to side pipeline B. The steel wire hose connects side pipeline A and side pipeline B.

3. The insulating joint device for replacing gas without stopping transmission according to claim 2 is characterized in that: The adjustable structure includes a tube body, the upper end of the tube body is set as a sealed cavity, a rotating shaft is arranged in the tube body, the lower end of the rotating shaft extends out of the tube body and is connected to a lower plug, the upper end of the rotating shaft passes through the sealed cavity and extends out of the tube body and is connected to a rotating head for driving the rotation of the rotating shaft, and a threaded connection is set between the rotating shaft and the sealed cavity.

4. The insulating joint device for replacing gas without stopping transmission according to claim 3 is characterized in that: The lower end of the tube body is provided with an external thread connected to the corresponding three-way joint, the side pipeline A is communicated with the tube body below the corresponding sealed cavity, the side pipeline B is communicated with the tube body below the corresponding sealed cavity, the lower plug of the device A extends into the three-way joint of the left vertical pipe, and the lower plug of the device B extends into the three-way joint of the right vertical pipe; The lower plug is a silicone sealing ring, which is sleeved on the lower end of the rotating shaft, and a fixing nut is threadedly installed on the lower end of the rotating shaft for fixing the silicone sealing ring; The sealing cavity comprises a bearing and a stopper fixedly mounted in the tube body, wherein the stopper is located below the bearing, two groups of oil seals are mounted on the inner wall of the tube body below the bearing, and a threaded connection is provided between the stopper and the rotating shaft.

5. The insulating joint device for replacing gas without stopping transmission according to claim 4 is characterized in that: The side pipeline A includes an elbow fixedly installed on the corresponding pipe body, the elbow is connected to a butterfly handle ball valve, the butterfly handle ball valve is connected to a reducer, and the large diameter end of the reducer is connected to a large diameter quick connect joint.

6. The insulating joint device for replacing gas without stopping transmission according to claim 5 is characterized in that: The side pipeline B includes an elbow fixedly installed on the corresponding pipe body, and the elbow is connected to two butterfly handle ball valves in sequence. A small-diameter quick-connect joint is provided between the two butterfly handle ball valves. The butterfly handle ball valve away from the elbow is connected to an auxiliary tee, and the vertical air vent of the auxiliary tee is connected to a copper ball valve, and the copper ball valve is connected to a pressure gauge. The other air vent of the auxiliary tee is connected to a reducer, and the large-diameter end of the reducer is connected to a large-diameter quick-connect joint.

7. The insulating joint device for replacing gas without stopping transmission according to claim 6 is characterized in that: The two ends of the steel wire hose are connected to the large-diameter quick-connect joints of the side pipeline A and the side pipeline B respectively.

8. The insulating joint device for replacing gas without stopping transmission according to claim 1 is characterized in that: The upper end of the rotating shaft is provided with a plurality of engraved lines for marking the position of the lower plug.

9. A method for using a gas non-stop transmission insulation joint replacement device, characterized in that: It comprises any gas non-stop transmission insulation joint replacement device as described in claims 1-8, and the method of use is as follows: Step 1, installation of device A and device B: remove the plug of the left riser, quickly insert the silicone seal ring of device A into the left riser, and then tighten the upper vent of the three-way joint between device A and the left riser until there is no air leakage. Connect device B to the right riser in the same way, and then connect the steel hose to device A, open all valves on device A, exhaust the air in the hose through the natural gas flow, connect the steel hose to device B after exhausting, and open all valves on device B, rotate the shaft according to the engraved lines on device A, close the lower vent of the three-way joint of the right riser through the silicone seal ring, and keep the left riser ball valve open, thereby realizing dual-way ventilation of the left riser-related users and the right riser-related users through the gas source of the left riser; Step 2, dismantle the original insulating joint: start to replace the insulating joint. If necessary, fix the pipeline and other pipeline parts with pipe clamps to keep them still. Rotate and remove the original insulating joint on the right vertical pipe, and then clean the raw tape at the connection. Step 3, install a new insulating joint: the original insulating joint should be completely removed, the right vertical pipe connection above the joint should be wrapped with raw tape counterclockwise, the right vertical pipe connection below the joint should be wrapped with raw tape clockwise, and then the new insulating joint should be installed on the right vertical pipe; Step 4, replace the insulating joint of the other end of the riser: After the insulating joint of the right riser is replaced, open the ball valve of the right riser, rotate the shaft on the right riser according to the engraved position to move the silicone sealing ring upward to achieve the connection between the right riser and device B, then rotate the shaft on the left riser according to the engraved position to move the silicone sealing ring downward to achieve the blocking of the left riser and device A, and then close the ball valve of the left riser, thereby achieving two-way ventilation of the right riser-related users and the left riser-related users through the gas source of the right riser, and then repeat the operations in steps 2 and 3 to replace the insulating joint on the left riser; Step 5, device removal: After replacing the insulating joints of the left and right risers, open the riser valve of the left riser. At this time, the riser valves of the left and right risers should be in the open state. Adjust the silicone sealing rings of device A and device B to the state of blocking the vents on the corresponding three-way joints. Close all valves on device A and device B, remove the quick connector, and disconnect device A and device B from the steel wire hose respectively; the following removal of device A and device B needs to be quick. Rotate the main body of device A and device B counterclockwise until the device threads are completely exposed. At the moment of pulling out the piston, install the threads until the threads are firmly connected to the riser. Step 6. After replacing the insulating joint removal device, remove the excess raw tape at the threaded parts and insulating joints, re-spray the riser with silver paint, and clean up the work traces.

10. The method for using the insulating joint device for replacing gas without stopping transmission according to claim 9 is characterized in that: If the right riser part above the live joint is stuck and difficult to remove during disassembly in step 2, lift the vertical air outlet of the right riser tee joint by lifting equipment.

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