A new type of substation SF6 electrical equipment inflation device and a method for using the same

Abstract

The application relates to a novel transformer SF6 electrical equipment inflation device and a use method thereof, which comprises a gas cylinder, a clamping module, a device pipeline check valve connected to one end of the clamping module, a sealing module connected to the other end of the clamping module, and an inflation auxiliary module connected to the sealing module; a device pipeline inflation port is arranged in the device pipeline check valve, and a device pipeline inflation port thimble is arranged in the device pipeline inflation port; the clamping module comprises a fixed joint, a plurality of adjusting screws are circumferentially arranged on the fixed joint, a driving clamping structure is arranged in the fixed joint, and the driving clamping structure clamps the connecting thread outside the device pipeline inflation port through the adjusting screws; the gas cylinder is communicated with the inflation auxiliary module through an inflation pipe, can adapt to different specifications of inflation ports, and can avoid the problems of low inflation efficiency and insufficient air tightness during inflation.

Description

TECHNICAL FIELD

[0001] The application relates to a novel SF6 electrical equipment inflation device for a transformer substation and a use method thereof, and belongs to the technical field of inflation devices. BACKGROUND

[0002] SF6 gas is used as arc extinguishing and insulating medium for electrical equipment such as circuit breakers, combined electrical apparatus and current transformers in a transformer substation, and the stability and reliability of the SF6 gas directly affect the safety of the power grid, so a large amount of SF6 gas supplement, gas test and other maintenance work need to be performed.

[0003] There are a large number of SF6 electrical equipment in the transformer substation, and the SF6 electrical equipment needs to be filled with SF6 for arc extinguishing and insulation. The inflation ports of the SF6 electrical equipment produced by different manufacturers are various in type and size, the sizes and pitches of the inflation port connecting threads are different, and therefore the corresponding inflation joints are various in type and style, which causes great trouble to the joint management work of the transformer substation. When the transformer substation inflates the electrical equipment, all the inflation joints need to be carried, and if only part of the joints are carried, the joints are prone to be mismatched, which brings inconvenience to the inflation work and consumes manpower. In addition, the inflation port is one-to-one corresponding to the joint, and the transformer substation needs to purchase each type of inflation joint, which greatly increases the use cost.

[0004] Meanwhile, the current SF6 pipeline joint connection mode mainly adopts various SF6 electrical equipment dedicated inflation joints to be connected to the corresponding SF6 electrical equipment, and the inflation joint management is complicated, the inflation efficiency is low, the air tightness during inflation does not meet the requirements, the check valve of the electrical equipment is damaged during inflation to cause gas leakage, and there are safety hazards and other disadvantages. SUMMARY

[0005] In order to solve the above problems existing in the prior art, the application provides a novel SF6 electrical equipment inflation device for a transformer substation and a use method thereof, which can adapt to different specifications of inflation ports and avoid the problems of low inflation efficiency and insufficient air tightness during inflation.

[0006] The technical scheme of the application is as follows:

[0007] A novel SF6 electrical equipment inflation device for a transformer substation, comprising a gas cylinder, a clamping module, a device pipeline check valve connected to one end of the clamping module, a sealing module connected to the other end of the clamping module, and an inflation auxiliary module connected to the sealing module; a device pipeline inflation port is arranged in the device pipeline check valve, and a device pipeline inflation port thimble is arranged in the device pipeline inflation port; the clamping module comprises a fixed joint, a driving assembly is arranged in a ring shape on the fixed joint, a clamping structure is arranged in the fixed joint, and the clamping structure clamps the connecting thread outside the device pipeline inflation port through the driving assembly; and the gas cylinder is communicated with the inflation auxiliary module through an inflation pipe.

[0008] The fixed joint is provided with a threaded hole in the ring direction, the driving assembly is an adjusting screw, the adjusting screw is threadedly connected to the threaded hole, the clamping structure comprises a sliding block pressing plate mounted in the fixed joint, the sliding block pressing plate is provided with a plurality of sliding grooves in the ring direction, and the sliding grooves correspond to the threaded holes.

[0009] The driving assembly comprises an annular air groove formed in the end face of the fixed joint, and three chambers are uniformly arranged on the side face of the fixed joint, and the chambers are communicated with the annular air groove through openings; a piston rod is arranged in the chamber; the clamping structure comprises a sliding block pressing plate mounted in the fixed joint, the sliding block pressing plate is provided with a plurality of sliding grooves in the ring direction, and the sliding grooves correspond to the chambers; the clamping structure further comprises a T-shaped sliding block, the piston rod is threadedly connected with the T-shaped sliding block, the T-shaped sliding block is radially slidably connected with the sliding grooves, and a nut disassembling block is fixedly mounted at the end of the T-shaped sliding block away from the piston rod; an internal thread is arranged on the inner side of the nut disassembling block, and the internal thread is matched with a connecting thread outside the inflation port of the equipment pipeline.

[0010] The sealing module is mounted in the fixed joint, the fixed joint is provided with an external thread outside and a sliding channel formed in the ring direction; the sealing module comprises a sliding sealing head, the sliding sealing head is located in the fixed joint, outer thread cylinders are mounted on the two sides of the sliding sealing head, the outer thread cylinders are slidably arranged through the sliding channel, and a conical sealing block is connected to the end of the sliding sealing head; the sealing module further comprises a sealing locking nut, the sealing locking nut is sleeved outside the fixed joint; the sealing locking nut is abutted to the outer thread cylinder to drive the sliding sealing head to form a seal with the inflation port of the equipment pipeline.

[0011] The fixed joint comprises a butt joint portion and a threaded portion, the clamping structure is arranged in the butt joint portion, the sealing module is mounted on the threaded portion, the external thread is arranged on the outer surface of the threaded portion, the sliding channel is arranged in the ring direction on the threaded portion, and the sealing locking nut is threadedly connected with the external thread.

[0012] The outer thread cylinder is threadedly connected with the sliding sealing head.

[0013] The inflation auxiliary module comprises an inflation pipe joint, one end of the inflation pipe joint is communicated with an inflation pipe, and the other end of the inflation pipe joint is provided with a ejector rod joint.

[0014] The inflation pipe joint is further provided with an inflation pipe joint nut, and the inflation pipe joint nut is used for threadedly connecting the inflation pipe joint and the ejector rod joint.

[0015] The gas cylinder is provided with a gas cylinder pressure reducing valve.

[0016] A use method of a novel transformer SF6 electrical equipment inflation device, characterized in that the use method comprises the following steps.

[0017] S1: when the equipment pipeline inflation port needs to be connected, first, the nut disassembly block is opened to a diameter sufficient to be sleeved with the connecting thread of the equipment pipeline inflation port; then, the driving assembly is adjusted to drive the T-shaped sliding block and the nut disassembly block to shrink to the middle, so that the internal thread of the nut disassembly block is tightly engaged with the connecting thread of the equipment pipeline inflation port.

[0018] S2: according to the position of the equipment pipeline inflation port needle, the length of the external thread cylinder extending the sliding sealing head is preliminarily adjusted, and the tapered sealing block with an appropriate size is selected and mounted on the sliding sealing head boss.

[0019] S3: the ejector rod joint is locked with the inflation pipe joint nut, the ejector rod joint and the inflation pipe joint are connected through the end face O-shaped ring, the sealing locking nut is locked with the external thread of the fixed joint, the sliding sealing head is driven forward by rotating the sealing locking nut, and the external taper surface of the tapered sealing block is synchronously moved forward until the external taper surface is tightly pressed against the inner hole of the equipment pipeline inflation port, so that the sealing is formed.

[0020] S4: the ejector rod locking nut is tightened, the ejector rod locking nut drives the ejector rod joint to move forward until the ejector rod joint opens the equipment pipeline inflation port needle.

[0021] S5: the gas cylinder pressure reducing valve is opened, the gas cylinder is communicated with the SF6 electrical equipment, the gas cylinder pressure reducing valve is pressurized, and the gas cylinder inflates the SF6 electrical equipment.

[0022] S6: after the inflation is completed, the gas cylinder pressure reducing valve is closed, the ejector rod locking nut is unscrewed, the external thread cylinder and the ejector rod joint are retreated, and the equipment pipeline inflation port needle returns to the state of being ejected.

[0023] S7: the driving assembly is used again to expand the diameter of the nut disassembly block, the clamping module is removed, and finally the site is arranged after the inflation is completed.

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

[0025] The application adjusts the screw against the T-shaped sliding block, controls the opening size of the nut disassembly block by rotating the adjusting screw, and thus adapts to the inflation port connecting threads of the same pitch and different sizes, so that the problem of inconvenience caused by the mismatch of the joint to the inflation work is effectively solved, and the problem of cost increase caused by the purchase of each specification of inflation joint is also solved.

[0026] The application installs the conical sealing block on the boss of the sliding sealing head, replaces the conical sealing gasket of different sizes to adapt to the different caliber sizes of the inflation port on different electrical equipment, adjusts the docking condition of the sliding sealing head and the inflation port of the equipment through the external threads on the sealing locking nut and the fixing ring, makes the outer thread cylinder lift up under the cooperation of the sealing locking nut and the fixing joint, and makes the conical sealing block tightly press against the inner hole of the inflation port to form a seal, effectively solving the problems of air tightness not meeting the requirements during inflation, air leakage caused by the damage of the check valve of the electrical equipment during inflation, and the safety hazards and other problems.

[0027] Meanwhile, the top rod joint 411 of the application is screwed forward into the device pipeline inflation port thimble 11 through the top rod locking nut 412, and the forward distance is 3-5mm, and the withdrawal distance is also the same, that is, the structure always maintains a sealed state with the device pipeline inflation port, avoiding gas overflow. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a novel SF6 electrical equipment inflation device for a substation of the application;

[0029] Figure 2 It is a disassembled structural schematic diagram of a novel SF6 electrical equipment inflation device for a substation of the application;

[0030] Figure 3 It is a disassembled structural schematic diagram of a clamping module in a novel SF6 electrical equipment inflation device for a substation of the application;

[0031] Figure 4 It is a disassembled structural schematic diagram of a sealing module in a novel SF6 electrical equipment inflation device for a substation of the application;

[0032] Figure 5 It is a disassembled structural schematic diagram of an inflation auxiliary module of a novel SF6 electrical equipment inflation device for a substation of the application;

[0033] Figure 6 It is an internal structural schematic diagram of a first embodiment of a novel SF6 electrical equipment inflation device for a substation of the application; It is an internal structural schematic diagram of a first embodiment of a novel SF6 electrical equipment inflation device for a substation of the application;

[0034] Figure 7 Figure 2 is a schematic diagram of the internal structure of a second embodiment of the new SF6 electrical equipment inflation device for a substation of the present application;

[0035] Figure 8 Figure 2 is a schematic diagram of the internal structure of a second embodiment of the new SF6 electrical equipment inflation device for a substation of the present application;

[0036] The reference signs in the drawings are as follows:

[0037] 1, equipment pipeline check valve; 2, clamping module; 3, sealing module; 4, inflation auxiliary module; 11, equipment pipeline inflation port thimble; 12, equipment pipeline inflation port; 21, nut disassembly block; 22, T-shaped slider; 23, slider pressing plate; 24, adjusting screw; 25, fixed joint; 31, sliding sealing head; 32, sealing locking nut; 33, external thread cylinder; 34, conical sealing block; 41, inflation pipe union joint; 42, inflation pipe; 43, gas cylinder pressure reducing valve; 44, gas cylinder; 45, inflation pipe union nut; 411, top rod joint; 412, top rod locking nut; 251, annular air groove; 26, piston rod; 27, quick plug joint; 28, pressure air pipe; 29, chamber; 46, second gas cylinder pressure reducing valve; 252, sealing gasket; 253, fixed joint cover; 261, blocking block; 421, vent valve. DETAILED DESCRIPTION

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

[0039] Please refer to Figures 1 to 8 , the present application provides a technical solution:

[0040] Embodiment I:

[0041] A new SF6 electrical equipment inflation device for a substation, comprising a gas cylinder 44, a gas cylinder pressure reducing valve 43 is installed on the gas cylinder 44, further comprising a clamping module 2, the SF6 electrical equipment inflation port is sleeved into the clamping module 2 and adjusted in size and clamped by the clamping module 2, so as to adapt to inflation ports of different models and specifications; one end of the clamping module 2 is connected with an equipment pipeline check valve 1, the other end of the clamping module 2 is connected with a sealing module 3, the sealing module 3 is connected with an inflation auxiliary module 4, the gas cylinder 44 is communicated with the inflation auxiliary module 4 through an inflation pipe 42; an equipment pipeline inflation port 12 is arranged in the equipment pipeline check valve 1, an equipment pipeline inflation port thimble 11 is installed in the equipment pipeline inflation port 12;

[0042] Specifically, the clamping module 2 comprises a fixed joint 25, the fixed joint 25 comprises a butt joint part and a threaded part, the butt joint part is an open-ended cylinder, the threaded part is fixedly installed on the back of the butt joint part, and an external thread is arranged on the outside of the threaded part; a plurality of threaded holes are arranged on the side of the butt joint part of the fixed joint 25 in a ring shape, the threaded holes are provided with adjusting screws 24, and the inside of the butt joint part of the fixed joint 25 is provided with a driving clamping structure; the driving clamping structure comprises a sliding block pressing plate 23 installed in the inside of the fixed joint 25, and a plurality of sliding grooves are arranged on the sliding block pressing plate 23 in a ring shape and correspond to the threaded holes; the driving clamping structure further comprises a T-shaped sliding block 22, the T-shaped sliding block 22 is in radial sliding connection with the sliding grooves, and a nut disassembling block 21 is fixedly installed at the end of the T-shaped sliding block 22 away from the adjusting screw 24; an internal thread is arranged on the inner side of the nut disassembling block 21 and matches the connecting thread on the outside of the equipment pipeline inflation port 12; a hole is arranged at the end of the T-shaped sliding block 22 away from the adjusting screw 24, the adjusting screw 24 is inserted into the hole and drives the T-shaped sliding block 22 to slide radially on the sliding groove; by rotating the adjusting screw 24, the opening size of the nut disassembling block 21 can be controlled, and meanwhile, the nut disassembling block 21 is replaced according to the connecting thread of the equipment pipeline inflation port 12 of different specifications, so that the adopted nut disassembling block 21 matches the pitch of the connecting thread of the equipment pipeline inflation port 12, thereby adapting to the connecting thread of the equipment pipeline inflation port 12 of the same pitch and different sizes.

[0043] That is, during use, only the nut disassembling block 21 of different pitches needs to be replaced, so that the connecting thread of the equipment pipeline inflation port 12 of different pitches can be adapted; and a flexible metal shell can be further installed at the bottom of the nut disassembling block 21, and the inside of the flexible metal shell is filled with electro-rheological fluid; the electro-rheological fluid is deformed when not activated, and the characteristic of the electro-rheological fluid is adapted to the connecting thread of the equipment pipeline inflation port 12 of different sizes.

[0044] The clamping module 2 of the inflation device is assembled, the adjusting screw 24 is loosened, the nut disassembling block 21 is opened to a diameter sufficient to be sleeved on the connecting thread of the equipment pipeline inflation port 12, the equipment pipeline inflation port 12 is sleeved in the clamping module 2, the connecting threads of the two are aligned, the adjusting screw 24 is tightened, the adjusting screw 24 drives the T-shaped sliding block 22 and the nut disassembling block 21 to shrink to the middle, and meanwhile, the inside of the nut disassembling block 21 is provided with an internal thread matched with the connecting thread of the inflation port, so that the internal thread of the nut disassembling block 21 is tightly engaged with the connecting thread of the equipment pipeline inflation port 12.

[0045] The sealing module 3 is installed in the threaded part of the fixed joint 25, and the sealing module 3 comprises a sliding sealing head 31 sliding in the threaded part, and an outer thread cylinder 33 threadedly connected to both sides of the sliding sealing head 31. The length of the outer thread cylinder 33 exceeding the surface of the sliding sealing head 31 can be adjusted through threaded connection. The threaded part of the fixed joint 25 is annularly and throughly provided with a sliding channel, and the outer thread cylinder 33 is slidingly arranged through the sliding channel. The sliding sealing head 31 is connected with a conical sealing block 34. Further, the conical sealing block 34 can be replaced with a conical sealing pad 34 of different sizes to adapt to different diameters of the inflation port of different electrical equipment. The conical sealing block 34 can prevent air leakage when the inflation auxiliary module 4 is connected with the inflation port 12 of the equipment pipeline for inflation.

[0046] The sealing module 3 further comprises a sealing locking nut 32, which is sleeved outside the threaded part 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 inflation port 12 of the equipment pipeline.

[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 an integral whole. The sliding sealing head 31 is arranged in the sliding channel of the threaded part of the fixed joint 25, and the outer thread cylinder 33 can move axially along the sliding channel. When the sealing locking nut 32 is tightened, 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 abuts against the inner hole of the inflation port 12 of the equipment pipeline to form a seal.

[0048] The inflation auxiliary module 4 comprises an inflation pipe adapter 41, one end of the inflation pipe adapter 41 being in communication with an inflation pipe 42. The other end of the inflation pipe adapter 41 is provided with a top rod joint 411 for the pin 11 of the inflation port of the equipment pipeline, and the top rod joint 411 is threadedly connected to the fixed joint 25 through a top rod locking nut 412. The inflation pipe adapter 41 is further provided with an inflation pipe adapter nut 45 for threadedly connecting and fixing the inflation pipe adapter 41 and the top rod joint 411.

[0049] The inflation pipe adapter 41, the inflation port adapter nut 45 and the inflation pipe 42 form an integral whole and are assembled together when leaving the factory. The top rod joint 411 is connected with the inflation port adapter nut 45, and then the top rod joint 411 is arranged in the inner hole of the sliding sealing head 31, and the top rod locking nut 412 is threadedly connected with the external thread of the threaded part of the fixed joint 25.

[0050] When the top rod locking nut 412 is tightened, the top rod locking nut 412 drives the top rod joint 411 to move forward until the top rod joint 411 pushes open the equipment pipeline inflation port thimble 11. When the meter on the equipment indicates a change, it indicates that the equipment pipeline inflation port thimble 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 inflation is completed, the top rod locking nut 412 is rotated backward to make the top rod joint 411 retreat, and the equipment pipeline inflation port thimble 11 returns to the state of being pushed out. Slowly open the vent valve 421 and observe the index of the meter on the equipment pipeline check valve 1. If the index does not change, it indicates that the equipment pipeline check valve 1 is sealed perfectly, and the sealing module 3 and the clamping module 2 can be loosened. If the meter index changes, it indicates that the equipment pipeline check valve 1 is damaged, and the equipment pipeline inflation port thimble 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 two:

[0053] The difference between embodiment two and embodiment one is only that the driving assembly adopted in embodiment one is different. The driving assembly adopted in embodiment two is to make the clamping module 2 clamp the equipment pipeline inflation port 12 by adopting the way of air pressure.

[0054] Specifically, the driving assembly includes an annular air groove 251 opened in the end face of the fixed joint 25, and three cavities 29 are uniformly arranged on the side surface of the fixed joint 25, and the cavities 29 are communicated with the annular air groove 251 through the openings. A piston rod 26 is arranged in the cavity 29. The clamping structure includes a sliding block pressure plate 23 mounted in the inside of the fixed joint 25, and a plurality of sliding grooves are arranged in the sliding block pressure plate 23 in a ring shape, and the sliding grooves correspond to the cavities 29. The clamping structure further includes a T-shaped sliding block 22, the piston rod 26 is threadedly connected with the T-shaped sliding block 22, the T-shaped sliding block 22 is radially slidably connected with the sliding grooves, and a nut disassembly block 21 is fixedly installed at the end of the T-shaped sliding block 22 away from the piston rod 26. An internal thread is arranged on the inner side of the nut disassembly block 21, and the internal thread matches the connecting thread outside the equipment pipeline inflation port 12. The port of one of the cavities 29 is provided with a quick plug connector 27 for air inlet, and the ports of the remaining cavities 29 are sealed by a plugging block 261 after the piston rod 26 is installed. The end of the quick plug connector 27 is connected to the second gas cylinder pressure reducing valve 46 of the gas cylinder 44 through the pressure air pipe 28. The annular air groove 251 in the end face is sealed by the sealing gasket 252 and the fixed joint cover 253.

[0055] The piston rod 26, the T-shaped sliding block 22 and the nut disassembly block 21 form an integral whole.

[0056] When installing, the nut disassembly block 21 is opened wide enough to fit into the equipment pipe inflation port 12, the pressure gas pipe 28 is connected, the second gas cylinder pressure reducing valve 46 is adjusted, the pressure is increased, the gas enters the chamber 29 of the fixed joint 25, the gas pressure drives the piston rod 26 to move, thereby driving the T-shaped slider 22 and the nut disassembly block 21 to contract to the middle until the connection threads of the nut disassembly block 21 and the equipment pipe inflation port 12 are tightly engaged. When disassembling the clamping module 2 after inflation is completed, only the second gas cylinder pressure reducing valve 46 is closed, the quick plug joint 27 is pulled out to release pressure, and the connection threads of the nut disassembly block 21 and the equipment pipe inflation port 12 are loosened.

[0057] A method for using a new type of substation SF6 electrical equipment inflation device, characterized in that it comprises the following steps:

[0058] S1: When the equipment pipe inflation port 12 needs to be connected, first, the nut disassembly block 21 is opened wide enough to fit into the connection threads of the equipment pipe inflation port 12; then, through the driving assembly, the screw 24 drives the T-shaped slider 22 and the nut disassembly block 21 to contract to the middle, so that the inner threads of the nut disassembly block 21 tightly engage with the connection threads of the equipment pipe inflation port 12;

[0059] S2: According to the position of the equipment pipe inflation port thimble 11, the length of the outer thread cylinder 33 extending out of the sliding sealing head 31 is preliminarily adjusted, and the tapered sealing block 34 of the appropriate size is selected and mounted on the boss of the sliding sealing head 31;

[0060] S3: The top rod joint 411 is locked with the inflation pipe joint nut 45, so that the top rod joint 411 is connected with the inflation pipe joint 41 through the end face O-shaped ring sealing, the top rod joint 411 is inserted into the hole of the sliding sealing head 31, the hole is sealed by the O-shaped ring, the sealing locking nut 32 is locked with the outer threads of the fixed joint 25, and the sliding sealing head 31 is driven forward by rotating the sealing locking nut 32, and the outer tapered surface of the tapered sealing block 34 is simultaneously moved forward until it is pressed tightly with the inner hole of the equipment pipe inflation port 12, forming a seal;

[0061] S4: Tighten the top rod locking nut 412, the top rod locking nut 412 drives the top rod joint 411 to move forward by 3-5 mm, until the top rod joint 411 pushes open the equipment pipe inflation port thimble 11;

[0062] S5: Open the gas cylinder pressure reducing valve 43, the gas cylinder 44 is connected with the SF6 electrical equipment, the gas cylinder pressure reducing valve 43 is pressurized, and the gas cylinder 44 inflates the SF6 electrical equipment;

[0063] S6: After inflation is completed, the gas cylinder pressure reducing valve 43 is closed, the top rod locking nut 412 is unscrewed, the top rod joint 411 is moved backward, and the equipment pipe inflation port thimble 11 returns to the state of being pushed out;

[0064] S7: again through the drive assembly, nut block 21 aperture expansion, remove the clamping module 2, and finally in the field after the completion of the arrangement.

[0065] It is worth mentioning that, spin off the top rod locking nut 412, top rod joint 411 back, so that the device pipeline inflation needle 11 restore top state, but not completely out of, device pipeline inflation 12 and inflation auxiliary module 4 is still connected as a whole, that is, still in a sealed state;

[0066] When the inflation, through the tapered sealing block 34 wrapped in the top rod joint 411 and device pipeline inflation needle 11 outside the package seal, and after the inflation, top rod joint 411 and device pipeline inflation needle 11 disconnected, but the device pipeline inflation 12, inflation auxiliary module 4 and the rest of the structure is still connected as a whole, so that in the state of not using, if there is a gas leak, will make the leaked gas accumulation in the device without spilling.

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

[0068] The present application by assembling the inflation device in the clamping module 2, loosen the adjusting screw 24, make the nut block 21 aperture expansion, remove the clamping module 2, and finally in the field after the completion of the arrangement.

[0069] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A novel SF6 electrical equipment filling device for substations, comprising a gas cylinder (44), characterized in that: It also includes 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). An inflation auxiliary module (4) is connected to the sealing module (3). The device pipeline check valve (1) is provided with a device pipeline inflation port (12), and an device pipeline inflation port pin (11) is installed in the device pipeline inflation port (12). The clamping module (2) includes a fixed joint (25), a drive assembly is circumferentially installed on the fixed joint (25), and a clamping structure is installed inside the fixed joint (25). The clamping structure clamps the device pipeline inflation port (12) through the drive assembly. The gas cylinder (44) is connected to the inflation auxiliary module (4) through the inflation pipe (42). The fixed joint (25) has a threaded hole circumferentially. The driving component is an adjusting screw (24), which is threaded into the threaded hole. The clamping structure includes a slider pressure plate (23) installed inside the fixed joint (25). The slider pressure plate (23) has several sliding grooves circumferentially, and the sliding grooves correspond to the threaded holes. The clamping structure also includes a T-shaped slider (22), which is radially slidably connected to the sliding groove. A nut disassembly block (21) is fixedly installed at the end of the T-shaped slider (22) away from the adjusting screw (24). The nut disassembly block (21) has an internal thread on its inner side, which matches the connecting thread on the outside of the equipment pipeline air inlet (12). The drive assembly includes an annular air groove (251) opened on the end face of the fixed joint (25), and three chambers (29) are evenly arranged on the side of the fixed joint (25). The chambers (29) and the annular air groove (251) are connected through openings. The chamber (29) is equipped with a sliding piston rod (26). The clamping structure includes a slider pressure plate (23) installed inside the fixed joint (25). The slider pressure plate (23) has several sliding grooves arranged in a circumferential direction, and the sliding grooves correspond to the chambers (29). The clamping structure also includes T-shaped slider (22), the piston rod (26) is threadedly connected to the T-shaped slider (22), the T-shaped slider (22) is radially slidably connected to the slide groove, and a nut disassembly block (21) is fixedly installed at the end of the T-shaped slider (22) away from the piston rod (26); the nut disassembly block (21) is provided with an internal thread on the inner side, and the internal thread matches the external connection thread of the equipment pipeline air inlet (12); a quick 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; the end of the quick connector (27) is connected to the second gas cylinder pressure reducing valve (46) of the gas cylinder (44) through a pressure air pipe (28).

2. The novel SF6 electrical equipment inflation device for substations as described in claim 1, characterized in that: The sealing module (3) is installed inside the fixed joint (25). The fixed joint (25) has an external thread and a circumferential sliding track. The sealing module (3) includes a sliding sealing head (31), which is located inside the fixed joint (25). Both sides of the sliding sealing head (31) are equipped with external threaded cylinders (33). The external threaded cylinders (33) slide through the sliding track. The end of the sliding sealing head (31) is connected to a conical sealing block (34). The sealing module (3) also includes a sealing locking nut (32), which is sleeved on the outside of the fixed joint (25). The sealing locking nut (32) abuts against the external threaded cylinder (33) to drive the sliding sealing head (31) to form a seal with the air inlet (12) of the equipment pipeline.

3. A novel SF6 electrical equipment inflation device for substations as described in claim 2, characterized in that: The fixed joint (25) includes a mating part and a threaded part. The clamping structure is disposed in the mating part. The sealing module (3) is installed on the threaded part. The external thread is disposed on the outer surface of the threaded part. The slide is disposed circumferentially on the threaded part. The sealing lock nut (32) is threadedly connected to the external thread.

4. A novel SF6 electrical equipment inflation device for substations as described in claim 2, characterized in that: The external threaded cylinder (33) is threadedly connected to the sliding sealing head (31).

5. A novel SF6 electrical equipment inflation device for substations as described in claim 2, characterized in that: The inflation auxiliary module (4) includes an inflation pipe fitting (41), one end of which is connected to the inflation pipe (42); the other end of the inflation pipe fitting (41) is connected to a push rod fitting (411) through an inflation pipe fitting nut (45). The push rod fitting (411) is used to push open the inflation port pin (11) of the equipment pipeline. The push rod fitting (411) is threadedly connected to the fixed joint (25) through a push rod locking nut (412).

6. A novel SF6 electrical equipment inflation device for substations as described in claim 5, characterized in that: The inflator fitting (41) is also provided with an inflator fitting nut (45), which is used to screw and fix the inflator fitting (41) to the top rod fitting (411).

7. A novel SF6 electrical equipment inflation device for substations as described in claim 1, characterized in that: The gas cylinder (44) is equipped with a gas cylinder pressure reducing valve (43).

8. The method of using a novel SF6 electrical equipment charging device for substations as described in any one of claims 1-7, characterized in that: S1: When it is necessary to connect the air inlet (12) of the equipment pipeline, firstly, the opening diameter of the nut disassembly block (21) is fitted into the connecting thread of the air inlet (12) of the equipment pipeline; then, through the drive assembly, the T-shaped slider (22) and the nut disassembly block (21) are driven to shrink towards the middle, so that the internal thread of the nut disassembly block (21) is tightly engaged with the connecting thread of the air inlet (12) of the equipment pipeline. S2: Based on the position of the air inlet pin (11) of the equipment pipeline, pre-adjust the length of the external thread cylinder (33) extending out of the sliding sealing head (31), and select a suitable size conical sealing block (34) to install on the boss of the sliding sealing head (31); S3: Lock the top rod connector (411) with the air pipe union nut (45) so that the top rod connector (411) and the air pipe union (41) are sealed by the end face O-ring. Insert the top rod connector (411) into the hole of the sliding sealing head (31) and seal the hole with the O-ring. Lock the sealing locking nut (32) with the external thread on the fixed connector (25). Rotate the sealing locking nut (32) to drive the sliding sealing head (31) forward, 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 air inlet (12) to form a seal. S4: Tighten the top rod locking nut (412). The top rod locking nut (412) drives the top rod connector (411) to move forward until the top rod connector (411) pushes open the equipment pipeline air inlet pin (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 make the gas cylinder (44) fill the SF6 electrical equipment; S6: After inflation is complete, close the gas cylinder pressure reducing valve (43), unscrew the top rod locking nut (412), and push the top rod joint (411) back 3-5mm to restore the equipment pipeline inflation port pin (11) to the ejected state; S7: Once again, the diameter of the nut disassembly block (21) is widened by the drive component, the clamping module (2) is removed, and finally the site is cleaned up after inflation.

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