Sulfur hexafluoride gas filling detection and recovery device

Abstract

The present invention provides a sulfur hexafluoride gas inflation detection and recovery device, which belongs to the technical field of power system, and includes a workbench, a density meter calibration module, a micro-water detection and gas composition detection module, a recovery bottle, and a gas replenishment bottle; a first interface is provided on the workbench; the density meter calibration module is arranged on the workbench, and the density meter calibration module is connected to the equipment density meter; the micro-water detection and gas composition detection module is arranged on the workbench, and the micro-water detection and gas composition detection module and the density meter calibration module are connected to the first interface through a first stop valve after being connected in parallel; the recovery bottle is connected to the micro-water detection and gas composition detection module and the density meter calibration module after being connected in parallel; the gas replenishment bottle is connected to the gas outlet end of the connecting pipeline between the first interface and the first stop valve. The sulfur hexafluoride gas inflation detection and recovery device provided by the present invention simplifies the manual operation process of detecting and replenishing sulfur hexafluoride gas in the equipment, and improves efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of power systems, and more specifically, relates to a sulfur hexafluoride gas inflation detection and recovery device. Background Art

[0002] Sulfur hexafluoride gas is a colorless, odorless, non-toxic, non-flammable stable gas with electrical properties such as insulation, so it is widely used in various electrical equipment. Electrical equipment filled with sulfur hexafluoride gas needs to regularly detect and replenish the sulfur hexafluoride gas in the equipment. This series of operations requires operators to hold special equipment and complete them in sequence. The operation is relatively complicated, time-consuming and labor-intensive. Summary of the invention

[0003] The purpose of the present invention is to provide a sulfur hexafluoride gas inflation detection and recovery device, which aims to solve the problem that electrical equipment filled with sulfur hexafluoride gas needs to regularly detect and replenish the sulfur hexafluoride gas in the equipment. This series of operations requires operators to hold special equipment and complete them in sequence, and the operation is relatively complicated, time-consuming and labor-intensive.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a sulfur hexafluoride gas inflation detection and recovery device, including a workbench, a density meter calibration module, a trace water detection and gas composition detection module, a recovery bottle, and a gas replenishment bottle; a first interface is provided on the workbench; the density meter calibration module is arranged on the workbench, the density meter calibration module is connected to the equipment density meter, and the density meter calibration module is used to calibrate the equipment density meter; the trace water detection and gas composition detection module is arranged on the workbench, the trace water detection and gas composition detection module and the density meter calibration module are connected in parallel and connected to the first interface through a first stop valve; the recovery bottle is connected to the gas outlet end of the trace water detection and gas composition detection module and the density meter calibration module after the parallel connection, and the recovery bottle is used to recover the sulfur hexafluoride gas after the detection; the gas replenishment bottle is connected to the connecting pipeline between the first interface and the first stop valve.

[0005] As another embodiment of the present application, the workbench is also provided with a second interface, one end of the second interface is connected to the connecting pipeline between the first interface and the first stop valve, and the other end is connected to the inflation bottle.

[0006] As another embodiment of the present application, a quick connector is provided at the first interface.

[0007] As another embodiment of the present application, the inflation bottle is connected to the second interface through an inflation box. An air pipe is provided in the inflation box, and the length of the air pipe extending out of the inflation box is adjustable.

[0008] As another embodiment of the present application, the inflation box includes a shell, a rotating shaft, a first torsion spring, and a limiting mechanism. The shell is provided with an inlet and an outlet, and the rotary joint includes an upper section and a lower section that can rotate relative to each other and are connected to each other, and the upper section is fixed at the outlet; the rotating shaft is rotatably arranged in the shell, and a guide channel is provided inside. A port on one side of the guide channel is aligned with the outlet, and a port on the other side is arranged on the side wall. An air pipe is wrapped around the rotating shaft, one end of the air pipe passes through the guide channel and is connected to the lower section of the rotating head, and the other end extends out through the inlet. As the rotating shaft rotates, the extended length of the air pipe is adjustable; the first torsion spring is sleeved on the rotating shaft, and one end is connected to the rotating shaft, and the other end is connected to the shell; the limiting mechanism is used to limit the extended length of the air pipe.

[0009] As another embodiment of the present application, a spiral groove is provided on the rotating shaft, and the spiral groove is used to guide the air pipe to be spirally wound around the rotating shaft, and one end of the spiral groove is opposite to the entrance of the guide channel.

[0010] As another embodiment of the present application, the limiting mechanism includes a ratchet, a pawl, and a second torsion spring. The ratchet is coaxially connected to the lower section of the rotary joint; the pawl is rotatably connected to the shell, and the pawl cooperates with the ratchet; the second torsion spring is sleeved on the central axis of the pawl, one end of the second torsion spring is connected to the pawl, and the other end is connected to the shell, and the central axis extends out of the shell.

[0011] As another embodiment of the present application, the recovery bottle, the gas replenishment bottle, and the gas charging bottle are all connected to the pipeline through a connector.

[0012] As another embodiment of the present application, the connector includes a sealing joint male head and a sealing joint female head. The sealing joint male head is fixed on the object to be connected. A first connecting tube is provided on the sealing joint male head, a limiting plate is provided on the first connecting tube, and an external thread is provided on the first connecting tube; the sealing joint female head is provided with a second connecting tube, a sealing sleeve is wrapped outside the second connecting tube, a first chamber and a second chamber are provided inside the sealing sleeve, the second connecting tube is threadedly connected to the first connecting tube, the first chamber part of the sealing sleeve is inserted into the space between the first connecting tube and the limiting plate, a connecting port is provided between the first chamber and the second chamber, a sealing sticker is attached to the connecting port, the volume of the second chamber is larger than that of the first chamber, an elastic cover is provided outside the sealing sleeve, the elastic cover deforms with the expansion of the sealing sleeve, an external thread is provided on the elastic cover, the elastic cover is threadedly connected to a nut, and the nut is used to squeeze the gas in the second chamber to break through the sealing sticker and enter the first chamber, and the sealing sleeve of the first chamber section expands to seal the connection between the first connecting tube and the second connecting tube.

[0013] As another embodiment of the present application, two sets of sealing sleeves, elastic covers and nuts are symmetrically provided on the second connecting pipe.

[0014] As another embodiment of the present application, the recovery bottle is connected to the trace water detection and gas composition detection module and the density meter calibration module through a check valve.

[0015] The beneficial effect of the sulfur hexafluoride gas inflation detection and recovery device provided by the present invention is that: compared with the prior art, the sulfur hexafluoride gas inflation detection and recovery device of the present invention is integrated with a density meter calibration module, a micro-water detection and gas composition detection module, a recovery gas cylinder and a gas replenishment bottle on the workbench, and the density meter calibration module is connected to the equipment density meter, and the equipment density meter can be calibrated. A first interface is provided on the workbench, and the micro-water detection and gas composition detection module and the density meter calibration module are connected to the first interface through a first stop valve after being connected in parallel; the recovery bottle is connected to the gas outlet end of the micro-water detection and gas composition detection module and the density meter calibration module after being connected in parallel, and the gas in the equipment can enter the micro-water detection and gas composition detection module and the density meter calibration module through the first interface for inspection and calibration, and then flow into the recovery bottle for recovery. At the same time, the gas equal to the amount of gas detected and lost can be supplemented through the gas replenishment bottle to ensure the gas concentration, so that the sulfur hexafluoride gas in the equipment can be detected, replenished, and other operations can be completed by manually controlling the workbench for simple operation or automatic control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of a sulfur hexafluoride gas inflation detection and recovery device provided in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of a connector provided by an embodiment of the present invention;

[0019] Figure 3 For along Figure 2 The cross-sectional structure diagram along the AA line;

[0020] Figure 4 for Figure 3 A partial enlarged view of B in FIG.

[0021] Figure 5 A schematic diagram of the structure of an inflatable box provided in an embodiment of the present invention;

[0022] Figure 6 A schematic cross-sectional structural diagram of a rotating shaft provided in an embodiment of the present invention.

[0023] In the figure: 1. first connecting pipe; 2. elastic cover; 3. nut; 4. second connecting pipe; 5. limit plate; 6. first chamber; 7. second chamber; 8. sealing sticker; 9. sealing sleeve; 10. rotary joint; 11. second torsion spring; 12. pawl; 13. ratchet; 14. rotating shaft; 15. shell; 17. spiral groove; 18. first torsion spring; 19. air pipe; 20. density meter; 21. density meter calibration module; 22. micro-water detection and gas composition detection module; 23. recovery bottle; 24. inflating bottle; 25. second pressure reducing valve; 26. inflating box; 27. gas replenishing bottle; 28. first pressure reducing valve; 29. ​​first stop valve; 30. first interface; 31. second interface; 32. check valve; 33. guide channel. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] Please also read Figure 1 , the sulfur hexafluoride gas inflation detection and recovery device provided by the present invention is now described. The sulfur hexafluoride gas inflation detection and recovery device includes a workbench, a density meter verification module 21, a micro-water detection and gas composition detection module 22, a recovery bottle 23, and a gas replenishment bottle 27; a first interface 30 is provided on the workbench; the density meter verification module 21 is arranged on the workbench, and the density meter verification module 21 is connected to the equipment density meter 20, and the density meter verification module 21 is used to verify the equipment density meter 20; the micro-water detection and gas composition detection module 22 is arranged on the workbench, and the micro-water detection and gas composition detection module 22 and the density meter verification module 21 are connected in parallel and connected to the first interface 30 through the first stop valve 29; the recovery bottle 23 is connected to the gas outlet end of the micro-water detection and gas composition detection module 22 and the density meter verification module 21 after parallel connection, and the recovery bottle 23 is used to recover the sulfur hexafluoride gas after detection; the gas replenishment bottle 27 is connected to the connecting pipeline between the first interface 30 and the first stop valve 29.

[0026] Compared with the prior art, the sulfur hexafluoride gas inflation detection and recovery device provided by the present invention integrates a density meter verification module 21, a micro-water detection and gas component detection module 22, a recovery gas cylinder and a gas replenishment bottle 27. The density meter verification module 21 is connected to the equipment density meter 20, and the equipment density meter 20 can be verified. A first interface 30 is provided on the workbench, and the micro-water detection and gas component detection module 22 and the density meter verification module 21 are connected in parallel and connected to the first interface 30 through a first stop valve 29; the recovery bottle 23 is connected to the gas outlet end of the micro-water detection and gas component detection module 22 and the density meter verification module 21 after parallel connection, and the gas in the equipment can enter the micro-water detection and gas component detection module 22 and the density meter verification module 21 through the first interface 30 for inspection and verification, and then flow into the recovery bottle 23 for recovery. At the same time, the gas equal to the amount of gas detected and lost can be replenished through the gas replenishment bottle 27 to ensure the gas concentration, so that the sulfur hexafluoride gas in the equipment can be detected, replenished, and other operations can be completed by manually controlling the workbench for simple operation or automatic control.

[0027] In this embodiment, the micro-water detection and gas composition detection module 22 includes a micro-water tester and a gas composition detector, and the density meter verification module 21 is a calibrator. The density meter 20 of the device is electrically connected to the density meter verification module 21 through a test line. The commonly used density meter 20 of the device is a sulfur hexafluoride gas relay, and the density meter verification module 21 is a sulfur hexafluoride gas relay calibrator.

[0028] In this embodiment, the first interface 30 of the workbench is connected to the device to be tested, the density meter verification module 21 is connected to the density meter 20 of the device through the interface, and the gas in the device flows into the micro-water detection and gas composition detection module 22 and the density meter verification module 21 for detection and verification. The gas after detection directly enters the recovery level 23 for recovery to avoid direct discharge. Because part of the gas in the device flows out for detection, resulting in a decrease in the gas in the device, the first stop valve 29 is closed, and the gas replenishment bottle 27 can replenish gas to the device.

[0029] In this embodiment, the gas replenishing bottle 27 is connected to the connecting pipeline between the first interface 30 and the first stop valve 29 through the first pressure reducing valve 28 .

[0030] In this embodiment, a control button is provided on the workbench, and the operator can control each module of the console through the control button. A control module can also be provided in the workbench, and the control module is connected with the density meter calibration module 21, the micro-water detection and gas composition detection module 22 and various valve bodies, so as to automatically control the entire sulfur hexafluoride gas inflation detection and recovery device, without manual operation, and more intelligent and convenient. Data information is directly transmitted to the background through the network and other means.

[0031] The direct discharge of sulfur hexafluoride gas will pollute the environment. At the same time, if the concentration of the discharged sulfur hexafluoride gas is too high, it will also be harmful to the human body. After the micro-water detection and gas composition detection module 22 and the density meter calibration module 21 are connected in parallel, the gas outlet end is connected to the recovery bottle 23, and the sulfur hexafluoride gas is directly recovered through the recovery bottle 23, which avoids the direct discharge of sulfur hexafluoride gas to cause environmental pollution. At the same time, it is conducive to the reuse of sulfur hexafluoride gas and saves resources. In this embodiment, a pressure sensor is arranged in the recovery bottle 23, and the pressure sensor is electrically connected to the control module. When the air pressure in the recovery bottle 23 reaches a certain value, it means that the recovery bottle 23 has been fully collected, and the recovery bottle 23 can be replaced in time, or the gas in the recovery bottle 23 can be transferred to prevent danger.

[0032] As a specific embodiment of the sulfur hexafluoride gas filling detection and recovery device provided by the present invention, please refer to Figure 1 The workbench is also provided with a second interface 31 , one end of the second interface 31 is connected to the connecting pipeline between the first interface 30 and the first stop valve 29 , and the other end is connected to the gas filling bottle 24 .

[0033] In this embodiment, when gas detection and equipment density meter 20 calibration are required, the gas flowing through the density meter 20 enters the workbench through the first interface 30, the first stop valve 29 is opened, and the gas enters the density meter calibration module 21 and the micro-water detection and gas composition detection module 22.

[0034] When there is a lack of gas in the device, the first stop valve 29 is closed, and the gas supply bottle 27 supplies gas to the device through the first interface 30 .

[0035] If the gas in the gas replenishing bottle 27 is insufficient, the gas charging bottle 24 can directly charge the gas in the gas replenishing bottle 27 through the second interface 31 .

[0036] If the equipment is seriously short of gas, the gas bottle 24 can be inflated through the second interface 31 , and the gas is directly supplied to the equipment from the first interface 30 through the connecting pipeline between the first interface 30 and the first stop valve 29 from the second interface 31 .

[0037] When it is necessary to detect the gas composition in the gas-filled bottle 24 , the gas in the gas-filled bottle 24 can directly pass through the second interface 31 and the first stop valve 29 to enter the micro-water detection and gas composition detection module 22 for detection.

[0038] As a specific embodiment of the sulfur hexafluoride gas filling detection and recovery device provided by the present invention, please refer to Figure 1 A quick connector is provided at the first interface 30 .

[0039] In this embodiment, a quick connector is provided to facilitate the quick connection between the work platform and the equipment. A quick connector is a connector that can connect or disconnect the pipeline without tools. Quick connectors can be divided into: quick connectors for air, quick connectors for oxygen fuel gas, quick connectors for gas and liquid, quick connectors for oil pressure, and quick connectors for inert gas.

[0040] As a specific embodiment of the sulfur hexafluoride gas filling detection and recovery device provided by the present invention, please refer to Figure 1 The gas filling bottle 24 is connected to the second interface 31 through the gas filling box 26. The gas filling box 26 is provided with an air pipe 19. The length of the air pipe 19 extending out of the gas filling box 26 is adjustable.

[0041] In this embodiment, a second pressure reducing valve 25 is provided between the gas filling bottle 24 and the gas filling box 26 .

[0042] In this embodiment, an air filling box 26 is provided which can adjust the extension length of the air pipe 19 , so as to facilitate the adjustment of the position of the air filling bottle 24 .

[0043] As a specific implementation of the embodiment of the present invention, please refer to Figure 5 and Figure 6 The inflatable box 26 includes a shell 15, a rotating shaft 14, a first torsion spring 18, and a limiting mechanism. The shell 15 is provided with an inlet and an outlet. The rotary joint 10 includes an upper section and a lower section that can rotate relative to each other and are connected to each other, and the upper section is fixed at the outlet; the rotating shaft 14 is rotatably arranged in the shell 15, and a guide channel 33 is provided inside. A port on one side of the guide channel 33 is aligned with the outlet, and a port on the other side is arranged on the side wall. The rotating shaft 14 is wrapped with an air pipe, and one end of the air pipe 19 passes through the guide channel 33 and is connected to the lower section of the rotating head 10, and the other end extends out through the inlet. As the rotating shaft 14 rotates, the extension length of the air pipe 19 is adjustable; the first torsion spring 18 is sleeved on the rotating shaft 14, and one end is connected to the rotating shaft 14, and the other end is connected to the shell 15; the limiting mechanism is used to limit the extension length of the air pipe 19.

[0044] In this embodiment, when it is necessary to adjust the extension length of the air pipe 19, the operator pulls the air pipe 19, driving the rotating shaft 14 to rotate, and the air pipe 19 is extended. At this time, because the first torsion spring 18 is sleeved on the rotating shaft 14, and one end is connected to the rotating shaft 14, and the other end is connected to the shell 15, the first torsion spring 18 generates a torsional force. When extended to the required length, the torsional force of the first torsion spring 18 is overcome by the limiting mechanism to limit and fix the air pipe 19, thereby preventing the air pipe 19 from being retracted due to the torque generated by the first torsion spring 18, thereby ensuring that the air pipe 19 is fixed at the required extension length.

[0045] In this embodiment, because the end of the guide channel 33 is coaxially aligned with the rotary joint 10, the air pipe 19 is wound along the spiral groove 17 and then extends from the end of the guide channel 33 to connect with the rotary joint 10, so the rotation of the shaft 14 will not affect the connection between the air pipe 19 and the rotary joint 10. The upper section of the rotary joint 10 is connected to the external pipeline of the inflatable box 26, and the rotation of the shaft 14 will not drive the external pipeline to rotate.

[0046] In this embodiment, the gas enters the gas pipe 19 from the through hole of the rotary joint 10 and is then output from the other end of the gas pipe 19, thereby achieving gas transmission.

[0047] As a specific implementation of the embodiment of the present invention, please refer to Figure 5 A spiral groove 17 is provided on the rotating shaft 14 , and the spiral groove 17 is used to guide the air pipe 19 to be spirally wound around the rotating shaft 14 , and one end of the spiral groove 17 is opposite to the entrance of the guide channel 33 .

[0048] In this embodiment, the rotating shaft 14 is provided with a spiral groove 17, and the air tube 19 is wound around the rotating shaft 14 along the groove, and then one end thereof extends into the guide channel 33. When inflated, the air tube 19 will expand, preventing the air tube 19 from freely winding and squeezing each other, thereby affecting accurate inflation.

[0049] When the shaft 14 rotates forward and the air pipe 19 is extended, the spiral groove 17 does not restrict the extension of the air pipe 19; when the shaft 14 rotates reversely and the air pipe 19 is retracted, the air pipe 19 is guided by the spiral groove 17 and is spirally wound around the shaft 14, which is neater and more beautiful, and can effectively prevent the air pipe 19 from being tangled during recovery.

[0050] As a specific implementation of the embodiment of the present invention, please refer to Figure 5 The limiting mechanism includes a ratchet 13, a pawl 12, and a second torsion spring 11. The ratchet 13 is coaxially connected to the lower section of the rotary joint 10; the pawl 12 is rotatably connected to the housing 15, and the pawl 12 cooperates with the ratchet 13; the second torsion spring 11 is sleeved on the central axis of the pawl 12, one end of the second torsion spring 11 is connected to the pawl 12, and the other end is connected to the housing 15, and the central axis extends out of the housing 15.

[0051] In this embodiment, when the air pipe 19 is pulled out, the rotating shaft 14 rotates forward, the ratchet 13 can rotate freely with the rotating shaft 14, and the pawl 12 does not limit the rotation of the ratchet 13. At this time, the first torsion spring 18 generates a torsion force. When the air pipe 19 is pulled to an appropriate length, because the second torsion spring 11 is provided on the rotating shaft 14 of the pawl 12, under the action of the second torsion spring 11, the pawl 12 is inserted between the teeth of the ratchet 13 to prevent the ratchet 13 from rotating in the opposite direction. Therefore, the pawl 12 cooperates with the ratchet 13 under the action of the second torsion spring 11, so that the ratchet 13 cannot rotate in the opposite direction to retract the air pipe 19, and the air pipe 19 is limited, and the air pipe 19 is stabilized and fixed at the required length, with a simple structure and low cost.

[0052] When it is necessary to retract, since the central shaft extends out of the housing 15, the operator rotates the central shaft, and the rotation of the central shaft drives the pawl 12 to rotate, and the pawl 12 is no longer inserted between the teeth of the ratchet wheel 13, so that the ratchet wheel 13 and the rotating shaft 14 rotate in the opposite direction, so that the air pipe 19 is reset. After that, the operator loosens the central shaft, and under the elastic force of the second torsion spring 11, the pawl 12 is reinserted between the teeth of the ratchet wheel 13, thereby restoring the initial state of the entire structure.

[0053] As a specific implementation of the embodiment of the present invention, please refer to Figures 2 to 4 The recovery bottle 23, the gas replenishing bottle 27, and the gas charging bottle 24 are all connected to the pipeline through a connector.

[0054] The connector in this embodiment has a good sealing effect, which can effectively prevent gas from leaking from the recovery bottle 23, the gas replenishment bottle 27, and the gas charging bottle 24. In addition, when connecting, the operation is simple and fast, which does not take time and effort, and improves the installation efficiency.

[0055] As a specific implementation of the embodiment of the present invention, please refer to Figures 2 to 4 The connector includes a sealing joint male head and a sealing joint female head. The sealing joint male head is fixed on the object to be connected. A first connecting pipe 1 is provided on the sealing joint male head, a limiting plate 5 is provided on the first connecting pipe 1, and an external thread is provided on the first connecting pipe 1; the sealing joint female head is provided with a second connecting pipe 4, a sealing sleeve 9 is wrapped outside the second connecting pipe 4, a first chamber 6 and a second chamber 7 are provided inside the sealing sleeve 9, the second connecting pipe 4 is threadedly connected to the first connecting pipe 1, the first chamber 6 of the sealing sleeve 9 is partially inserted into the space between the first connecting pipe 1 and the limiting plate 5, a connecting port is provided between the first chamber 6 and the second chamber 7, a sealing sticker 8 is attached to the connecting port, the volume of the second chamber 7 is larger than that of the first chamber 6, an elastic cover 2 is provided outside the sealing sleeve 9, the elastic cover 2 is deformed with the expansion of the sealing sleeve 9, an external thread is provided on the elastic cover 2, the elastic cover 2 is threadedly connected to the nut 3, and the nut 3 is used to squeeze the gas in the second chamber 7 to break through the sealing sticker 8 and enter the first chamber 6, and the sealing sleeve 9 of the first chamber 6 expands and seals the connection between the first connecting pipe and the second connecting pipe.

[0056] In this embodiment, when the connecting joint is in use, taking the gas bottle 24 as an example, the male end of the sealing joint is directly integrated with the gas bottle 24 and fixed on the gas bottle 24 .

[0057] The sealing sleeve 9 is provided with an elastic cover 2, and the first chamber 6 of the sealing sleeve 9 is partially not blocked by the elastic cover 2. Before use, the second chamber 7 of the female sealing joint is inflated, but because the sealing sticker 8 is attached to the connection port, the gas cannot enter the first chamber 6 from the second chamber 7, so that the corresponding section of the second chamber 7 and the elastic cover 2 expands with the second chamber 7, and this section expands outward gradually and gently from the first chamber 6 to the second chamber 7.

[0058] During installation, the first connecting tube 1 of the male sealing joint is threadedly connected with the second connecting tube 4 of the female sealing joint, and the first chamber 6 part of the sealing sleeve 9 that is not blocked by the elastic cover 2 extends into the space between the first connecting tube 1 and the limiting plate 5. Then the nut 3 is rotated so that when the nut 3 moves toward the second chamber 7, the elastic cover 2 is deformed under the pressure of the nut 3, and the elastic cover 2 transfers the pressure to the second chamber 7, so that the gas in the second chamber 7 is compressed, breaking through the sealing sticker 8 and entering the first chamber 6. The first chamber 6 expands and contacts the outer wall of the connection between the second connecting tube 4 and the first connecting tube 1, and also contacts the limiting plate 5. If there is gas leaking from the connection between the first connecting tube and the second connecting tube, it encounters the sealing sleeve 9, which will block the gas for a second time, achieving a better sealing effect and further preventing leakage.

[0059] As a specific implementation of the embodiment of the present invention, please refer to Figures 2 to 4 Two sets of sealing sleeves 9, elastic covers 2 and nuts 3 are symmetrically arranged on the second connecting pipe 4.

[0060] In this embodiment, when the female sealing joint is directly fixed on the connecting pipe, only one set of sealing sleeve 9, elastic cover 2 and nut 3 is required.

[0061] When two components need to be connected, two sets of sealing sleeves 9, elastic covers 2 and nuts 3 are symmetrically provided on the second connecting pipe 4, which can be connected to the sealing joint male heads on the two components respectively.

[0062] As a specific implementation of the embodiment of the present invention, please refer to Figure 1 The recovery bottle 23 is connected to the micro-water detection and gas component detection module 22 and the density meter calibration module 21 through the check valve 32.

[0063] In this embodiment, when the sulfur hexafluoride gas that has passed through the micro-water detection and gas component detection module 22 and the density meter calibration module 21 continuously flows into the recovery bottle 23, the gas pressure in the recovery bottle 23 increases, and there is a risk of gas reflux. If the sulfur hexafluoride gas in the recovery bottle 23 refluxes into the micro-water detection and gas component detection module 22 and the density meter calibration module 21, it will affect the measurement accuracy of the two modules. A check valve 32 is set, and the recovery bottle 23 is connected to the micro-water detection and gas component detection module 22 and the density meter calibration module 21 through the check valve 32, which can effectively prevent the gas from flowing back from the recovery bottle 23, thereby ensuring the measurement accuracy of the micro-water detection and gas component detection module 22 and the density meter calibration module 21.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Sulfur hexafluoride gas filling detection and recovery device, characterized in that: include: A workbench, wherein a first interface is provided on the workbench; A density meter calibration module is provided on the workbench and is connected to the equipment density meter, and is used to calibrate the equipment density meter; A micro-water detection and gas component detection module is arranged on the workbench. The micro-water detection and gas component detection module and the density meter calibration module are connected in parallel and connected to the first interface through a first stop valve; A recovery bottle, connected to the gas outlet end of the micro-water detection and gas composition detection module and the density meter calibration module connected in parallel, for recovering the sulfur hexafluoride gas after detection; and A gas replenishing bottle connected to the connecting pipeline between the first interface and the first stop valve; The workbench is also provided with a second interface, one end of which is connected to the connecting pipeline between the first interface and the first stop valve, and the other end of which is connected to the gas filling bottle; The recovery bottle, gas replenishment bottle and gas charging bottle are all connected to the pipeline through a connector; The connector comprises: A sealing joint male head is fixedly mounted on an object to be connected, a first connecting pipe is arranged on the sealing joint male head, a limiting plate is arranged on the first connecting pipe, and an external thread is arranged on the first connecting pipe; A sealing joint female head is provided with a second connecting pipe, the second connecting pipe is wrapped with a sealing sleeve, a first chamber and a second chamber are provided in the sealing sleeve, the second connecting pipe is threadedly connected to the first connecting pipe, the first chamber part of the sealing sleeve is inserted into the space between the first connecting pipe and the limiting plate, a connecting port is provided between the first chamber and the second chamber, a sealing sticker is attached to the connecting port, the volume of the second chamber is greater than that of the first chamber, an elastic cover is provided outside the sealing sleeve, the elastic cover is deformed with the expansion of the sealing sleeve, the elastic cover is provided with an external thread, the elastic cover is threadedly connected to a nut, the nut is used to squeeze the gas in the second chamber to break through the sealing sticker and enter the first chamber, and the sealing sleeve of the first chamber section expands to seal the connection between the first connecting pipe and the second connecting pipe; The recovery bottle is connected to the micro-water detection and gas composition detection module and the density meter calibration module through a check valve.

2. The sulfur hexafluoride gas inflation detection and recovery device according to claim 1, characterized in that: A quick connector is provided at the first interface.

3. The sulfur hexafluoride gas inflation detection and recovery device according to claim 1, characterized in that: The inflatable bottle is connected to the second interface via an inflatable box. An air pipe is arranged in the inflatable box. The length of the air pipe extending out of the inflatable box is adjustable.

4. The sulfur hexafluoride gas inflation detection and recovery device as claimed in claim 3, characterized in that: The inflatable box comprises: A housing having an inlet and an outlet; The rotary joint comprises an upper section and a lower section which are relatively rotatable and interconnected, and the upper section is fixed at the outlet; A rotating shaft is rotatably arranged in the housing, and a guide channel is arranged inside. A port on one side of the guide channel is aligned with the outlet, and a port on the other side is arranged on the side wall. An air pipe is wound around the rotating shaft, and one end of the air pipe passes through the guide channel and is connected to the lower section of the rotating head, and the other end extends out through the inlet. The extension length of the air pipe is adjustable as the rotating shaft rotates; A first torsion spring is sleeved on the rotating shaft, one end of the first torsion spring is connected to the rotating shaft, and the other end of the first torsion spring is connected to the housing; The limiting mechanism is used to limit the extended length of the trachea.

5. The sulfur hexafluoride gas inflation detection and recovery device according to claim 4, characterized in that: The rotating shaft is provided with a spiral groove, and the spiral groove is used to guide the air pipe to be spirally wound around the rotating shaft, and one end of the spiral groove is opposite to the entrance of the guide channel.

6. The sulfur hexafluoride gas inflation detection and recovery device according to claim 4, characterized in that: The limiting mechanism comprises: A ratchet wheel coaxially connected to the lower section of the rotary joint; A pawl, rotatably connected to the housing, the pawl being matched with the ratchet wheel; The second torsion spring is sleeved on the central axis of the pawl, one end of the second torsion spring is connected to the pawl, and the other end is connected to the shell, and the central axis extends out of the shell.

7. The sulfur hexafluoride gas inflation detection and recovery device according to claim 1, characterized in that: The second connecting pipe is symmetrically provided with two sets of sealing sleeves, elastic covers and nuts.

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