Novel transformer substation SF6 electrical equipment inflation device and use method thereof

Abstract

The invention relates to a novel transformer substation SF6 electrical equipment inflation device and a using method thereof. The novel transformer substation SF6 electrical equipment inflation device comprises a gas cylinder and a clamping module, one end of the clamping module is connected with an equipment pipeline check valve, the other end of the clamping module is connected with a sealing module, and the sealing module is connected with an inflation auxiliary module; an equipment pipeline inflation inlet is formed in the equipment pipeline check valve, and an equipment pipeline inflation inlet ejector pin is mounted in the equipment pipeline inflation inlet; the clamping module comprises a fixing connector, a plurality of adjusting screws are annularly installed on the fixing connector, a driving clamping structure is installed in the fixing connector, and the driving clamping structure clamps connecting threads outside an equipment pipeline inflation inlet through the adjusting screws. The gas cylinder is communicated with the inflation auxiliary module through the inflation pipe. The inflation device can adapt to inflation openings of different specifications, and the problems that the inflation efficiency is low and the air tightness is insufficient during inflation are solved.

Description

Technical Field

[0001] The invention relates to a novel SF6 electrical equipment charging device for a transformer substation and a use method thereof, belonging to the technical field of charging devices. Background Art

[0002] Circuit breakers, combined electrical appliances, current transformers and other electrical equipment in substations all use SF6 gas as arc extinguishing and insulating medium. The stability and reliability of SF6 gas directly affects the safety of the power grid. Therefore, a large amount of maintenance work such as SF6 gas replenishment and gas testing is required.

[0003] There are a large number of SF6 electrical equipment in the substation, which need to be filled with SF6 for arc extinguishing and insulation. The filling ports of SF6 electrical equipment produced by different manufacturers are of various types and sizes, and the sizes and pitches of the filling port connection threads are different. Therefore, the corresponding filling joints are also of various types and styles, which causes great trouble to the joint management of the substation. When the substation fills the electrical equipment, it is necessary to carry all the filling joints. If only some joints are brought, it is easy to cause the joints to be mismatched, which brings inconvenience to the filling work and consumes manpower. In addition, the filling port corresponds to the joint one by one, and the substation needs to purchase each specification of the filling joint, which greatly increases the use cost;

[0004] At the same time, the current connection method with SF6 pipeline joints mainly adopts various SF6 electrical equipment-specific inflation joints to connect with corresponding SF6 electrical equipment. There are still disadvantages in the connection method, such as complicated management of inflation joints, low inflation efficiency, failure to meet the air tightness requirements during inflation, damage to the check valve of electrical equipment during inflation, resulting in leakage, and safety hazards. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a new substation SF6 electrical equipment charging device and a method of using the same, which can adapt to charging ports of different specifications and avoid the problems of low charging efficiency and insufficient airtightness during charging.

[0006] The technical solution of the present invention is as follows:

[0007] A novel substation SF6 electrical equipment charging device comprises a gas cylinder and a clamping module, one end of the clamping module is connected to an equipment pipeline check valve, the other end of the clamping module is connected to a sealing module, and the sealing module is connected to a charging auxiliary module; an equipment pipeline charging port is provided in the equipment pipeline check valve, and an equipment pipeline charging port thimble is installed in the equipment pipeline charging port; the clamping module comprises a fixed joint, a driving component is circumferentially installed on the fixed joint, a clamping structure is installed inside the fixed joint, and the clamping structure clamps the connecting thread outside the equipment pipeline charging port through the driving component; the gas cylinder is connected to the charging auxiliary module through a charging pipe.

[0008] Among them, a threaded hole is circumferentially opened on the fixed joint, the driving component is an adjusting screw, the adjusting screw is threadedly connected to the threaded hole, the clamping structure includes a slider pressure plate installed inside the fixed joint, the slider pressure plate is circumferentially provided with a plurality of sliding grooves, the sliding grooves correspond to the threaded holes; the clamping structure also includes a T-shaped slider, the T-shaped slider is radially slidably connected to the sliding grooves, and a nut decomposition block is fixedly installed at one end of the T-shaped slider away from the adjusting screw; the inner side of the nut decomposition block is provided with an internal thread, and the internal thread matches the connecting thread on the outside of the equipment pipeline inflation port.

[0009] Among them, the driving assembly includes an annular air groove opened on the end face of the fixed joint, and three chambers are evenly arranged on the side of the fixed joint, and the chamber is connected to the annular air groove through an opening; a piston rod is installed in the chamber, and the clamping structure includes a slider pressure plate installed inside the fixed joint, and the slider pressure plate is circumferentially provided with a plurality of slide grooves, and the slide grooves correspond to the chamber; the clamping structure also includes a T-type slider, the piston rod is threadedly connected to the T-type slider, and the T-type slider is radially slidably connected to the slide groove, and a nut decomposition block is fixedly installed on the end of the T-type slider away from the piston rod; an internal thread is arranged on the inner side of the nut decomposition block, and the internal thread matches the connecting thread on the outside of the equipment pipeline inflation port; a quick-connect connector is installed at the port of one of the chambers for air intake, and the ports of the other chambers are sealed; the end of the quick-connect connector is connected to the second gas cylinder pressure reducing valve of the gas cylinder through a pressure gas pipe.

[0010] In which, the sealing module is installed inside the fixed joint, the outside of the fixed joint is provided with an external thread and a slideway is opened circumferentially through the fixed joint; the sealing module includes a sliding sealing head, the sliding sealing head is located inside the fixed joint, external thread cylinders are installed on both sides of the sliding sealing head, the external thread cylinders slide through the slideway setting, and a conical sealing block is connected to the end of the sliding sealing head; the sealing module also includes a sealing locking nut, the sealing locking nut is sleeved on the outside of the fixed joint; the sealing locking nut presses against the external thread cylinder to drive the sliding sealing head to form a seal with the equipment pipeline inflation port.

[0011] Among them, the fixed joint includes a docking part and a threaded part, the clamping structure is arranged in the docking part, the sealing module is installed on the threaded part, the external thread is arranged on the outer surface of the threaded part, the slideway is annularly arranged on the threaded part, and the sealing locking nut is threadedly connected to the external thread.

[0012] Wherein, the outer thread cylinder is threadedly connected to the sliding sealing head.

[0013] Among them, the inflation auxiliary module includes an inflation pipe flexible joint, one end of which is connected to the inflation pipe; the other end of the inflation pipe flexible joint is provided with a push rod joint, which is used to push open the inflation port ejector of the equipment pipeline, and the push rod joint is threadedly connected to the fixed joint through a push rod locking nut.

[0014] Wherein, an air pipe union nut is also provided on the air pipe union, and the air pipe union nut is used to screw and fix the air pipe union and the push rod joint.

[0015] Wherein, a gas cylinder pressure reducing valve is installed on the gas cylinder.

[0016] A method for using a novel substation SF6 electrical equipment charging device, characterized in that it comprises the following steps:

[0017] S1: When it is necessary to connect the equipment pipeline inflation port, first, the nut decomposition block is opened to a diameter large enough to fit into the connecting thread of the equipment pipeline inflation port; then, through the driving assembly, the adjustment screw drives the T-shaped slider and the nut decomposition block to shrink toward the middle, so that the internal thread of the nut decomposition block and the connecting thread of the equipment pipeline inflation port are tightly engaged;

[0018] S2: According to the position of the ejector pin of the equipment pipeline inflation port, pre-adjust the length of the outer thread cylinder extending out of the sliding seal head, and select a tapered seal block of suitable size to be installed on the boss of the sliding seal head;

[0019] S3: Lock the push rod joint with the inflation pipe union nut, so that the push rod joint and the inflation pipe union are sealed and connected through the end face O-ring, lock the sealing lock nut with the external thread on the fixed joint, and drive the sliding sealing head forward by rotating the sealing lock nut, and the outer cone surface of the conical sealing block moves forward synchronously until it is pressed against the inner hole of the equipment pipeline inflation port to form a seal;

[0020] S4: Tighten the locking nut of the ejector rod, and the locking nut of the ejector rod drives the ejector rod joint to move forward until the ejector rod joint pushes open the ejector pin of the equipment pipeline inflation port;

[0021] S5: Open the gas cylinder pressure reducing valve, connect the gas cylinder with the SF6 electrical equipment, pressurize the gas cylinder pressure reducing valve, and make the gas cylinder inflate the SF6 electrical equipment;

[0022] S6: After the inflation is completed, close the gas cylinder pressure reducing valve, unscrew the locking nut of the ejector rod, and move the outer thread cylinder and the ejector rod joint backward to restore the ejector pin of the equipment pipeline inflation port to the ejection state;

[0023] S7: Use the drive assembly again to expand the diameter of the nut decomposition block, remove the clamping module, and finally tidy up on site after inflation is completed.

[0024] The present invention has the following beneficial effects:

[0025] The present invention fixes the slider pressure plate and the fixed joint by screws, limits the T-shaped slider between the two, and the adjustment screw presses against the T-shaped slider. By rotating the adjustment screw, the opening size of the nut decomposition block can be controlled, so as to adapt to the inflatable port connecting threads of the same pitch and different sizes. Only the nut decomposition blocks with different pitches need to be replaced to adapt to the inflatable port connecting threads of different pitches, effectively solving the problem of inconvenience caused by mismatched joints to the inflation work, and also eliminating the need to purchase inflation joints of each specification to increase costs.

[0026] The invention installs the conical sealing block on the boss of the sliding sealing head. According to the different calibers of the inflation ports on different electrical equipment, conical sealing pads of different sizes can be replaced to adapt. Moreover, by connecting the sealing locking nut and the external threads on the fixing ring, the docking condition between the sliding sealing head and the inflation port of the equipment can be adjusted, so that the external thread cylinder is lifted up under the cooperation of the sealing locking nut and the fixing joint, so that the conical sealing block presses against the inner hole of the inflation port to form a seal, effectively solving the problems that the air tightness does not meet the requirements during inflation, the check valve of the electrical equipment is damaged during inflation, resulting in leakage, and there are safety hazards.

[0027] At the same time, the push rod joint 411 of the present invention is screwed forward by the push rod locking nut 412 to push open the equipment pipeline inflation port push pin 11, and the forward distance here is 3-5mm, and the withdrawal distance is also the same, that is, this structure always maintains a sealed state with the equipment pipeline inflation port to prevent gas overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural schematic diagram of a novel SF6 electrical equipment charging device for a substation according to the present invention;

[0029] Figure 2 This is a schematic diagram of the exploded structure of a novel SF6 electrical equipment charging device for a substation according to the present invention;

[0030] Figure 3 It is a schematic diagram of the exploded structure of a clamping module in a novel SF6 electrical equipment charging device for a substation according to the present invention;

[0031] Figure 4 This is a schematic diagram of the exploded structure of a sealing module in a novel SF6 electrical equipment charging device for a substation according to the present invention;

[0032] Figure 5 This is a schematic diagram of the exploded structure of a charging auxiliary module of a novel substation SF6 electrical equipment charging device according to the present invention;

[0033] Figure 6 This is a schematic diagram of the internal structure of a novel substation SF6 electrical equipment charging device according to a first embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the internal structure of a second embodiment of a novel substation SF6 electrical equipment charging device of the present invention;

[0035] Figure 8 This is a schematic diagram of the exploded structure of a second embodiment of a novel substation SF6 electrical equipment charging device according to the present invention.

[0036] The reference numerals in the figure are as follows:

[0037] 1. Equipment pipeline check valve; 2. Clamping module; 3. Sealing module; 4. Inflating auxiliary module; 11. Equipment pipeline inflation port ejector; 12. Equipment pipeline inflation port; 21. Nut decomposition block; 22. T-type slider; 23. Slider pressure plate; 24. Adjustment screw; 25. Fixed joint; 31. Sliding sealing head; 32. Sealing locking nut; 33. External thread cylinder; 34. Conical sealing block; 41. Inflating pipe joint; 42. Inflating pipe; 43. Gas cylinder pressure reducing valve; 44. Gas cylinder; 45. Inflating pipe joint nut; 411. Ejector rod joint; 412. Ejector rod locking nut; 251. Annular gas groove; 26. Piston rod; 27. Quick connector; 28. Pressure gas pipe; 29. ​​Chamber; 46. Second gas cylinder pressure reducing valve; 252. Sealing pad; 253. Fixed joint cover; 261. Blocking block; 421. Vent valve. DETAILED DESCRIPTION

[0038] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] See also Figures 1 to 8 , the invention provides a technical solution:

[0040] Embodiment 1:

[0041] A novel substation SF6 electrical equipment charging device includes a gas cylinder 44, a gas cylinder pressure reducing valve 43 is installed on the gas cylinder 44, and a clamping module 2. The charging port of the SF6 electrical equipment is inserted into the clamping module 2 and the size is adjusted and clamped by the clamping module 2, so as to adapt to charging ports of different models and specifications; one end of the clamping module 2 is connected to an equipment pipeline check valve 1, and the other end of the clamping module 2 is connected to a sealing module 3, and the sealing module 3 is connected to a charging auxiliary module 4, and the gas cylinder 44 is connected to the charging auxiliary module 4 through a charging pipe 42; an equipment pipeline charging port 12 is provided in the equipment pipeline check valve 1, and an equipment pipeline charging port ejector 11 is installed in the equipment pipeline charging port 12;

[0042] Specifically, the clamping module 2 includes a fixed joint 25, which includes a docking portion and a threaded portion. The docking portion is in the shape of a tube with one end open, the threaded portion is fixedly installed on the back of the docking portion and an external thread is arranged on the outside of the threaded portion; a plurality of threaded holes are circumferentially opened on the side surface of the docking portion of the fixed joint 25, and an adjustment screw 24 is installed in the threaded hole. A driving clamping structure is installed inside the docking portion of the fixed joint 25, and the clamping structure includes a slider pressure plate 23 installed inside the fixed joint 25, and the slider pressure plate 23 is circumferentially provided with a plurality of sliding grooves, which correspond to the threaded holes; the driving clamping structure also includes a T-shaped slider 22, which is radially slidably connected to the sliding groove, and the T-shaped slider 22 is away from the adjustment screw A nut decomposition block 21 is fixedly installed at one end of 24; an internal thread is arranged on the inner side of the nut decomposition block 21, and the internal thread matches the connecting thread on the outside of the equipment pipeline inflation port 12; a hole is arranged on the end of the T-shaped slider 22 facing the adjustment screw 24, and the adjustment screw 24 is inserted into the hole and drives the T-shaped slider 22 to slide radially on the slide groove; by rotating the adjustment screw 24, the opening size of the nut decomposition block 21 can be controlled, and at the same time, the nut decomposition block 21 can be replaced according to the connecting threads of the equipment pipeline inflation port 12 of different specifications, so that the adopted nut decomposition block 21 matches the pitch of the connecting threads of the equipment pipeline inflation port 12, thereby adapting to the connecting threads of the equipment pipeline inflation port 12 of the same pitch and different sizes;

[0043] That is, during use, it is only necessary to replace the nut decomposition block 21 with different pitches to adapt to the connecting threads of the equipment pipeline inflation port 12 with different pitches; a flexible metal shell can also be installed at the bottom of the nut decomposition block 21, and the flexible metal shell is filled with electrorheological fluid, and the connecting threads of the equipment pipeline inflation port 12 with different sizes are adapted through the deformation characteristics of the electrorheological fluid when not activated;

[0044] The present invention assembles the clamping module 2 of the inflation device, loosens the adjusting screw 24, and makes the nut decomposition block 21 open with a diameter sufficient to be inserted into the connecting thread of the equipment pipeline inflation port 12, inserts the equipment pipeline inflation port 12 into the clamping module 2, aligns the connecting threads of the two, tightens the adjusting screw 24, and the adjusting screw 24 drives the T-shaped slider 22 and the nut decomposition block 21 to shrink toward the middle. At the same time, the interior of the nut decomposition block 21 is provided with an internal thread that matches the connecting thread of the inflation port, so that the internal thread of the nut decomposition block 21 is tightly engaged with the connecting thread of the equipment pipeline inflation port 12.

[0045] The sealing module 3 is installed inside the threaded part of the fixed joint 25, and the sealing module 3 includes a sliding sealing head 31 that slides inside the threaded part. The sliding sealing head 31 is threadedly connected with an external thread cylinder 33 on both sides. The length of the external thread cylinder 33 exceeding the surface of the sliding sealing head 31 can be adjusted through the threaded connection. The threaded part of the fixed joint 25 is circumferentially provided with a slideway, and the external thread cylinder 33 slides through the slideway setting; the end of the sliding sealing head 31 is connected with a conical sealing block 34. Further, the conical sealing block 34 can be replaced with conical sealing pads 34 of different sizes according to the different calibers of the inflation ports on different electrical equipment to adapt. The conical sealing block 34 can prevent air leakage when the inflation auxiliary module 4 is docked with the equipment pipeline inflation port 12 for inflation;

[0046] The sealing module 3 also includes a sealing locking nut 32, which is sleeved on the outside of the threaded portion of the fixed joint 25; the sealing locking nut 32 abuts against the outer thread cylinder 33 to drive the sliding sealing head 31 to form a seal with the equipment pipeline inflation port 12;

[0047] The conical sealing block sleeve 34 is sleeved on the front end of the sliding sealing head 31, and the outer thread cylinder 33 is screwed into the sliding sealing head 31, and the three form a whole; the sliding sealing head 31 is installed in the slideway of the threaded part of the fixed joint 25, and the outer thread cylinder 33 can move axially along the slideway; when the sealing nut 32 is screwed tightly, the sealing nut 32 pushes the outer thread cylinder 33, the sliding sealing head 31 and the conical sealing block 34 to move until the conical sealing block 34 presses against the inner hole of the equipment pipeline inflation port 12 to form a seal;

[0048] The inflation auxiliary module 4 includes an inflation tube joint 41, one end of which is connected to the inflation tube 42; the other end of the inflation tube joint 41 is provided with a push rod joint 411, and the push rod joint 411 is used to push open the inflation port ejector 11 of the equipment pipeline, and the push rod joint 411 is threadedly connected to the fixed joint 25 through a push rod locking nut 412; the inflation tube joint 41 is also provided with an inflation tube joint nut 45, and the inflation tube joint nut 45 is used to screw and fix the inflation tube joint 41 and the push rod joint 411.

[0049] The inflation pipe union 41, the inflation port union nut 45 and the inflation pipe 42 are an integral unit and are assembled together before leaving the factory; the push rod joint 411 is connected to the inflation port union nut 45, and then the push rod joint 411 is installed into the inner hole of the sliding sealing head 31, and the push rod locking nut 412 is connected to the external thread of the threaded part of the fixed joint 25;

[0050] When the push rod locking nut 412 is tightened, the push rod locking nut 412 drives the push rod joint 411 to move forward until the push rod joint 411 pushes open the equipment pipe inflation port push pin 11. When the meter indication on the equipment changes, it means that the equipment pipe inflation port push pin 11 has been pushed open, and inflation can begin.

[0051] Specifically, the inflation pipe 42 is provided with a vent valve 421, which has the function of detecting whether the equipment pipeline check valve 1 is damaged. After the inflation is completed, the push rod locking nut 412 is rotated backward to make the push rod joint 411 retreat, and the equipment pipeline inflation port ejector 11 resumes the ejected state. Slowly open the vent valve 421, observe the index of the meter on the equipment pipeline check valve 1, if the index does not change, it means that the equipment pipeline check valve 1 is well sealed, then the sealing module 3 and the clamping module 2 can be loosened; if the meter index changes, it means that the equipment pipeline check valve 1 is damaged, and the equipment pipeline inflation port ejector 11 cannot seal the equipment pipeline inflation port 12, at this time, close the vent valve 421 to avoid gas leakage, and perform maintenance operations.

[0052] Embodiment 2:

[0053] The difference between the second embodiment and the first embodiment is that the driving assembly used in the first embodiment is different. The driving assembly used in the second embodiment uses air pressure to enable the clamping module 2 to clamp the equipment pipe inflation port 12;

[0054] Specifically, the driving assembly includes an annular air groove 251 provided on the end surface of the fixed joint 25, and three chambers 29 are evenly arranged on the side of the fixed joint 25, and the chamber 29 is connected with the annular air groove 251 through an opening; a piston rod 26 is installed in the chamber 29, and the clamping structure includes a slider pressure plate 23 installed inside the fixed joint 25, and the slider pressure plate 23 is circumferentially provided with a plurality of slide grooves, and the slide grooves correspond to the chamber 29; the clamping structure also includes a T-shaped slider 22, the piston rod 26 is threadedly connected to the T-shaped slider 22, and the T-shaped slider 22 is radially slidably connected to the slide groove, and the T-shaped slider A nut decomposition block 21 is fixedly installed at one end 22 away from the piston rod 26; an internal thread is arranged on the inner side of the nut decomposition block 21, and the internal thread matches the connecting thread on the outside of the equipment pipeline inflation port 12; a quick-connect connector 27 is installed at the port of one of the chambers 29 for air intake, and the ports of the other chambers 29 are sealed by a blocking block 261 after the piston rod 26 is installed; the end of the quick-connect connector 27 is connected to the second gas cylinder pressure reducing valve 46 of the gas cylinder 44 through the pressure gas pipe 28; the annular gas groove 251 on the end face is sealed with a sealing gasket 252 and a fixed joint cover 253.

[0055] The piston rod 26, the T-shaped slider 22, and the nut decomposition block 21 form a whole;

[0056] During installation, the nut decomposition block 21 is opened enough to be inserted into the equipment pipeline inflation port 12, the pressure gas pipe 28 is connected, and the second gas cylinder pressure reducing valve 46 is adjusted to increase the pressure. The gas enters the chamber 29 of the fixed joint 25, and the gas pressure pushes the piston rod 26 to move, thereby driving the T-shaped slider 22 and the nut decomposition block 21 to shrink toward the middle until they are tightly engaged with the connecting thread of the equipment pipeline inflation port 12. After the inflation is completed, when the clamping module 2 is disassembled, it is only necessary to close the second gas cylinder pressure reducing valve 46, pull out the quick connector 27 to release the pressure, and loosen the connection between the nut decomposition block 21 and the thread of the equipment pipeline inflation port 12.

[0057] A method for using a novel substation SF6 electrical equipment charging device, characterized in that it comprises the following steps:

[0058] S1: When it is necessary to connect the equipment pipeline inflation port 12, first, the nut decomposition block 21 is opened to a diameter large enough to fit into the connecting thread of the equipment pipeline inflation port 12; then, through the driving assembly, the adjustment screw 24 drives the T-shaped slider 22 and the nut decomposition block 21 to shrink toward the middle, so that the internal thread of the nut decomposition block 21 is tightly engaged with the connecting thread of the equipment pipeline inflation port 12;

[0059] S2: According to the position of the ejector pin 11 of the equipment pipeline inflation port, the length of the outer thread cylinder 33 extending out of the sliding sealing head 31 is preliminarily adjusted, and a conical sealing block 34 of suitable size is selected and installed on the boss of the sliding sealing head 31;

[0060] S3: Lock the push rod joint 411 with the inflation pipe joint nut 45, so that the push rod joint 411 and the inflation pipe joint 41 are sealed and connected through the end face O-ring, insert the push rod joint 411 into the hole of the sliding sealing head 31, the hole is sealed by the O-ring, lock the sealing locking nut 32 with the external thread on the fixed joint 25, and drive the sliding sealing head 31 forward by rotating the sealing locking nut 32, and the outer cone surface of the conical sealing block 34 moves forward synchronously until it is pressed against the inner hole of the equipment pipeline inflation port 12 to form a seal;

[0061] S4: Tighten the push rod locking nut 412, and the push rod locking nut 412 drives the push rod joint 411 to move forward 3 to 5 mm until the push rod joint 411 pushes open the equipment pipeline inflation port ejector 11;

[0062] S5: Open the gas cylinder pressure reducing valve 43, connect the gas cylinder 44 with the SF6 electrical equipment, pressurize the gas cylinder pressure reducing valve 43, and make the gas cylinder 44 inflate the SF6 electrical equipment;

[0063] S6: After the inflation is completed, the gas cylinder pressure reducing valve 43 is closed, the ejector locking nut 412 is unscrewed, and the ejector joint 411 moves backward, so that the ejector pin 11 of the equipment pipeline inflation port returns to the ejection state;

[0064] S7: Use the driving assembly again to expand the diameter of the nut decomposition block 21, remove the clamping module 2, and finally tidy up on site after the inflation is completed.

[0065] It is worth mentioning that, by unscrewing the ejector locking nut 412, the ejector joint 411 moves backward, so that the ejector pin 11 of the equipment pipeline inflation port is restored to the ejection state, but is not completely withdrawn, and the equipment pipeline inflation port 12 and the inflation auxiliary module 4 are still connected as a whole, that is, they are still in a sealed state;

[0066] When inflating, the conical sealing block 34 is wrapped around the ejector joint 411 and the outside of the equipment pipe inflation port ejector 11 for sealing. After the inflation is completed, the ejector joint 411 is disconnected from the equipment pipe inflation port ejector 11, but the equipment pipe inflation port 12, the inflation auxiliary module 4 and the remaining structures are still connected as a whole, so that when not in use, if there is a leak, the leaked gas will be accumulated inside the device without overflowing.

[0067] The working principle of the above-mentioned new substation SF6 electrical equipment charging device is as follows:

[0068] The present invention assembles the clamping module 2 in the inflation device, loosens the adjusting screw 24, so that the opening diameter of the nut decomposition block 21 is large enough to be inserted into the connecting thread of the equipment pipeline inflation port 12, inserts the equipment pipeline inflation port 12 into the clamping module 2, aligns the connecting threads of the two, tightens the adjusting screw 24, so that the internal thread of the nut decomposition block 21 and the external thread of the inflation port are tightly engaged, and according to the position of the ejector pin 11 of the equipment pipeline inflation port, the length of the external thread cylinder 33 extending out of the sliding sealing head 31 is preliminarily adjusted in advance, and a conical sealing block 34 of a suitable size is selected and installed on the boss of the sliding sealing head 31, and the sliding sealing head 31 is locked with the inflation pipe joint 41, and an O-ring is used to form a sealed connection between the two, and the other end of the inflation pipe 42 is connected to the gas cylinder 44, and the sealing locking nut 32 is connected to the external thread on the fixed joint 25. The threads are locked, driving the sliding sealing head 31 forward, and the outer cone surface of the conical sealing block 34 is pressed against the inner hole of the equipment pipeline inflation port 12 to form a seal, and then the gas cylinder pressure reducing valve 43 is opened, the gas cylinder 44 is connected to the SF6 electrical equipment, and the gas cylinder pressure reducing valve 43 is pressurized to make the gas cylinder 44 inflate the SF6 electrical equipment. After the inflation is completed, the gas cylinder pressure reducing valve 43 is closed, and the ejector locking nut 412 is unscrewed, so that the ejector pin 11 of the equipment pipeline inflation port is restored to the ejected state, and the SF6 electrical equipment inflation port is sealed; check whether the pipeline check valve is damaged; unscrew the sealing locking nut 32, and the outer thread cylinder 33 drives the sliding sealing head 31 to retreat and exit the sealing module 3; unscrew the adjusting screw 24 to expand the diameter of the nut decomposition block 21, remove the clamping module 2, and finally tidy up on site after the inflation is completed.

[0069] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A novel SF6 electrical equipment charging device for a substation, comprising a gas cylinder (44), characterized in that: The invention also comprises a clamping module (2), one end of which is connected to a device pipeline check valve (1), and the other end of which is connected to a sealing module (3), and an inflation auxiliary module (4) is connected to the sealing module (3); an device pipeline inflation port (12) is provided in the device pipeline check valve (1), and an device pipeline inflation port ejector (11) is installed in the device pipeline inflation port (12); the clamping module (2) comprises a fixed joint (25), a driving component is annularly installed on the fixed joint (25), a clamping structure is installed inside the fixed joint (25), and the clamping structure clamps the connecting thread outside the device pipeline inflation port (12) through the driving component; the gas cylinder (44) is connected to the inflation auxiliary module (4) through the inflation pipe (42).

2. A novel substation SF6 electrical equipment charging device as claimed in claim 1, characterized in that: A threaded hole is circumferentially provided on the fixed joint (25); the driving component is an adjusting screw (24), which is threadedly connected to the threaded hole; the clamping structure includes a slider pressure plate (23) installed inside the fixed joint (25); the slider pressure plate (23) is circumferentially provided with a plurality of slide grooves, which correspond to the threaded holes; the clamping structure also includes a T-shaped slider (22), which is radially slidably connected to the slide grooves; a nut decomposition block (21) is fixedly installed at one end of the T-shaped slider (22) away from the adjusting screw (24); an internal thread is provided on the inner side of the nut decomposition block (21), which matches the connecting thread on the outside of the equipment pipeline inflation port (12).

3. A novel substation SF6 electrical equipment charging device as claimed in claim 1, characterized in that: The driving assembly comprises an annular air groove (251) provided on the end surface of the fixed joint (25), and three chambers (29) are evenly arranged on the side of the fixed joint (25), and the chambers (29) are connected with the annular air groove (251) through openings; a sliding piston rod (26) is installed in the chamber (29), and the clamping structure comprises a slider pressure plate (23) installed inside the fixed joint (25), and the slider pressure plate (23) is circumferentially provided with a plurality of sliding grooves, and the sliding grooves correspond to the chambers (29); the clamping structure also comprises a T-shaped slider (22), and the piston rod (26) and the T-shaped slider ( 22) threaded connection, the T-shaped slider (22) is radially slidably connected to the slide groove, and a nut decomposition block (21) is fixedly installed at one end of the T-shaped slider (22) away from the piston rod (26); an internal thread is arranged on the inner side of the nut decomposition block (21), and the internal thread matches the connecting thread on the outside of the equipment pipeline inflation port (12); a quick-connect connector (27) is installed at the port of one of the chambers (29) for air intake, and the ports of the remaining chambers (29) are sealed; the end of the quick-connect connector (27) is connected to the second gas cylinder pressure reducing valve (46) of the gas cylinder (44) through a pressure gas pipe (28).

4. A novel substation SF6 electrical equipment charging device as claimed in claim 2 or 3, characterized in that: The sealing module (3) is installed inside the fixed joint (25), the outside of the fixed joint (25) is provided with an external thread and a slideway is opened in the circumferential direction through the fixed joint (25); the sealing module (3) includes a sliding sealing head (31), the sliding sealing head (31) is located inside the fixed joint (25), both sides of the sliding sealing head (31) are provided with external thread cylinders (33), the external thread cylinders (33) slide through the slideway, and the end of the sliding sealing head (31) is connected with a conical sealing block (34); the sealing module (3) also includes a sealing locking nut (32), the sealing locking nut (32) is sleeved on the outside of the fixed joint (25); the sealing locking nut (32) abuts against the external thread cylinder (33) to drive the sliding sealing head (31) to form a seal with the equipment pipeline inflation port (12).

5. A novel substation SF6 electrical equipment charging device as claimed in claim 4, characterized in that: The fixed joint (25) comprises a docking portion and a threaded portion, the clamping structure is arranged in the docking portion, the sealing module (3) is installed on the threaded portion, the external thread is arranged on the outer surface of the threaded portion, the slideway is annularly arranged on the threaded portion, and the sealing locking nut (32) is threadedly connected to the external thread.

6. A novel substation SF6 electrical equipment charging device as claimed in claim 4, characterized in that: The outer thread cylinder (33) is threadedly connected to the sliding sealing head (31).

7. A novel substation SF6 electrical equipment charging device as claimed in claim 4, characterized in that: The inflation auxiliary module (4) comprises an inflation pipe flexible joint (41), one end of which is connected to an inflation pipe (42); the other end of the inflation pipe flexible joint (41) is connected to a push rod joint (411) via an inflation pipe flexible joint nut (45), the push rod joint (411) being used to push open the inflation port ejector (11) of the equipment pipeline, and the push rod joint (411) is threadedly connected to the fixed joint (25) via a push rod locking nut (412).

8. A novel substation SF6 electrical equipment charging device as claimed in claim 7, characterized in that: The inflation pipe union joint (41) is also provided with an inflation pipe union nut (45), and the inflation pipe union nut (45) is used to screw and fix the inflation pipe union joint (41) and the push rod joint (411).

9. A novel substation SF6 electrical equipment charging device as claimed in claim 1, characterized in that: The gas cylinder (44) is provided with a gas cylinder pressure reducing valve (43).

10. A method for using a novel substation SF6 electrical equipment charging device as claimed in any one of claims 1 to 9, characterized in that: S1: When it is necessary to connect the equipment pipeline inflation port (12), first, the nut decomposition block (21) is opened to a diameter large enough to fit into the connecting thread of the equipment pipeline inflation port (12); then, the driving component is used to drive the T-shaped slider (22) and the nut decomposition block (21) to shrink toward the middle, so that the internal thread of the nut decomposition block (21) is tightly engaged with the connecting thread of the equipment pipeline inflation port (12); S2: According to the position of the ejector pin (11) of the equipment pipeline inflation port, the length of the outer thread cylinder (33) extending out of the sliding sealing head (31) is preliminarily adjusted, and a conical sealing block (34) of suitable size is selected and installed on the boss of the sliding sealing head (31); S3: The push rod joint (411) is locked with the inflation pipe joint nut (45), so that the push rod joint (411) and the inflation pipe joint (41) are sealed and connected through the end face O-ring, and the push rod joint (411) is inserted into the hole of the sliding sealing head (31), and the hole is sealed by the O-ring, and the sealing locking nut (32) is locked with the external thread on the fixed joint (25), and the sliding sealing head (31) is driven forward by rotating the sealing locking nut (32), and the outer cone surface of the conical sealing block (34) is synchronously moved forward until it is pressed against the inner hole of the equipment pipeline inflation port (12) to form a seal; S4: Tighten the push rod locking nut (412), and the push rod locking nut (412) drives the push rod joint (411) to move forward until the push rod joint (411) pushes open the equipment pipeline inflation port ejector (11); S5: Open the gas cylinder pressure reducing valve (43), connect the gas cylinder (44) to the SF6 electrical equipment, pressurize the gas cylinder pressure reducing valve (43), and allow the gas cylinder (44) to inflate the SF6 electrical equipment; S6: After the inflation is completed, the gas cylinder pressure reducing valve (43) is closed, the ejector locking nut (412) is unscrewed, and the ejector joint (411) is moved back 3-5 mm to restore the ejector pin (11) of the equipment pipeline inflation port to the ejection state; S7: Use the drive assembly again to expand the diameter of the nut decomposition block (21), remove the clamping module (2), and finally tidy up on site after the inflation is completed.

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