Plugging device replacing insulating sealing cap

Abstract

The utility model discloses a plugging device for replacing an insulation sealing cap, which relates to the field of electric power safety and comprises a front joint, a T-shaped channel is arranged in the front joint, and the T-shaped channel is composed of a transverse channel and a vertical channel; a plug is inserted into the vertical channel of the front connector, a special fitting is arranged at the end of the plug, and the special fitting is in clearance fit with the inner wall of the transverse channel of the front connector. The special fitting is internally in threaded connection with a variable-diameter screw rod, a sleeve and a plugging head are inserted into the transverse channel of the front connector, and the sleeve and the plugging head are distributed on the two sides of the special fitting and are both in threaded connection with the variable-diameter screw rod. The device has the advantages that the sleeve cannot be separated from the front connector through cooperation of the plug head, the special fitting and the variable-diameter screw, the surface of the sleeve is tightly attached to the inner wall of the front connector, bubbles are eliminated, the partial discharge condition is avoided, and the device is convenient to disassemble and assemble and can be repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power safety, in particular to a sealing device replacing an insulating sealing cap. Background Art

[0002] When part of the circuit of the high-voltage cable branch box / ring main unit is not installed or used, it is necessary to use an insulating cap to seal the bushing to prevent leakage and injury to people and damage to equipment. After sealing with the insulating cap, due to its structural characteristics, it is difficult to disassemble and assemble the insulating cap, and the exhaust is incomplete. It is easy to form small bubbles on the contact surface between the insulating cap and the bushing, resulting in a loose interface, causing a sharp increase in local discharge until the cap and bushing are punctured, resulting in heavy losses. Utility Model Content

[0003] The purpose of the present utility model is to provide a plugging device that replaces the insulating sealing cap in order to solve the above-mentioned problem, as described below.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model provides a plugging device that replaces an insulating sealing cap, comprising a front joint, wherein a T-shaped channel is provided inside the front joint, and the T-shaped channel is composed of a transverse channel and a vertical channel;

[0006] A plug is inserted into the vertical channel of the front joint, and a special hardware is provided at the end of the plug, and the special hardware is matched with the inner wall of the horizontal channel of the front joint;

[0007] The special hardware is internally threadedly connected with a reducing screw, a sleeve and a plug stopper are inserted into the transverse channel of the front joint, and the sleeve and the plug stopper are distributed on both sides of the special hardware and are both threadedly connected with the reducing screw.

[0008] The plugging device replacing the insulating plug cap is used, the plugging head is inserted into the front joint, the reducing screw is threadedly connected to the casing, the casing is inserted into the front joint, and the reducing screw is passed through the special hardware, and finally the plug stopper is inserted into the front joint, and the plug stopper is threadedly connected with the reducing screw, and the casing cannot be separated from the front joint through the cooperation of the plug stopper, the special hardware and the reducing screw;

[0009] The parts of the front joint corresponding to the plug stopper and the sleeve are tightened by the fastening assembly and the clamp, thereby improving the stability of the connection between the sleeve and the plug stopper and the front joint.

[0010] Preferably, the plug, sleeve and stopper are all in clearance fit with the inner wall of the T-shaped channel of the front joint.

[0011] Preferably, the special hardware is threadedly connected to the end of the plug.

[0012] Preferably, a nut is provided at the end of the plug head facing away from the sleeve.

[0013] Preferably, the plug, sleeve and stopper are all truncated cone-shaped, and opposite ends of the sleeve and stopper are in contact with two sides of the special hardware respectively.

[0014] Preferably, an annular groove is provided on the surface of the front joint, and a clamp is sleeved on the annular groove, and the clamp corresponds to the sleeve.

[0015] Preferably, a fastening assembly is provided on the surface of the front joint for tightening the portion of the front joint corresponding to the plug stopper.

[0016] Preferably, the fastening assembly includes a fixing ring and several fixing blocks, and the several fixing blocks are distributed in an annular manner on the surface of the front joint, the fixing ring is threadedly connected to the surface of the front joint, the circumferential surface of the inner wall of the fixing ring corresponds to the fixing block, the top of the fixing block is an arc, and the top of the fixing block is higher than the circumferential surface of the inner wall of the fixing ring, the fixing block is elastic, and a hexagonal sleeve is provided on the surface of the fixing ring.

[0017] The beneficial effects are:

[0018] The stopper head, special hardware and reducing screw are used together to prevent the sleeve from being separated from the front joint, and the sleeve surface fits tightly with the inner wall of the front joint to eliminate bubbles and avoid partial discharge. The device is easy to disassemble and assemble and can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a front view structural schematic diagram of the utility model;

[0021] Figure 2 It is a schematic diagram of the front cross-sectional structure of the utility model;

[0022] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0023] The following are the descriptions of the reference numerals:

[0024] 1. Front joint; 2. Plug; 3. Special hardware; 4. Variable diameter screw; 5. Annular groove; 6. Clamp; 7. Sleeve; 8. Fastening assembly; 9. Plug; 10. Nut; 11. Fixing ring; 12. Hexagonal sleeve; 13. Fixing block. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0026] See also Figure 1-Figure 3 As shown, the utility model provides a plugging device that replaces the insulating sealing cap, including a front joint 1, the front joint 1 has a T-shaped channel inside, and the T-shaped channel is composed of a horizontal channel and a vertical channel;

[0027] A plug 2 is inserted into the vertical channel of the front connector 1, and a special hardware 3 is provided at the end of the plug 2, and the special hardware 3 is gap-matched with the inner wall of the transverse channel of the front connector 1;

[0028] The special hardware 3 is internally threadedly connected with a reducing screw 4, and a sleeve 7 and a plug stopper 9 are inserted into the transverse channel of the front joint 1, and the sleeve 7 and the plug stopper 9 are distributed on both sides of the special hardware 3 and are both threadedly connected with the reducing screw 4;

[0029] Through the cooperation of the plug head 9, the special hardware 3 and the reducing screw 4, the sleeve 7 cannot be separated from the front joint 1, so as to solve the problem of large partial discharge (the partial discharge failure rate of the electrical performance test is 17% before use and 1% after use), and eliminate the risk of breakdown of the plugging device and the sleeve (the breakdown rate is 8% before use and 0% after use). After use, power frequency / DC voltage test, partial discharge test and impulse voltage test can be carried out, and the parameters meet the technical requirements of GB / T 11022-2020, GB / T 3906-2020, GB / T12706.1-2020 and GB / T 12706.2-2020.

[0030] As an optional implementation, the plug 2, the sleeve 7 and the stopper 9 are all fitted with the inner wall gap of the T-shaped channel of the front joint 1, so that air can be prevented.

[0031] The special hardware 3 is threadedly connected to the end of the plug 2, which is convenient for installing the special hardware 3. The special hardware 3 and the plug 2 are designed separately to facilitate processing and manufacturing.

[0032] A nut 10 is provided at the end of the stopper head 9 facing away from the sleeve 7 , and the nut 10 is provided to facilitate the use of a tool to rotate the stopper head 9 .

[0033] The plug 2, sleeve 7 and plug stopper 9 are all truncated cone-shaped, and the opposite ends of the sleeve 7 and the plug stopper 9 are respectively in contact with the two sides of the special hardware 3. Compared with the columnar design, this design can improve the sealing performance between the plug 2, sleeve 7 and the plug stopper 9 and the inner wall of the front joint 1.

[0034] An annular groove 5 is provided on the surface of the front joint 1, and a clamp 6 is sleeved on the annular groove 5, and the clamp 6 corresponds to the sleeve 7. The clamp 6 is tightened to tighten the front joint 1, thereby improving the tightness and firmness between the sleeve 7 and the front joint 1.

[0035] A fastening assembly 8 is provided on the surface of the front joint 1 for tightening the portion of the front joint 1 corresponding to the plug stop 9 .

[0036] The fastening assembly 8 includes a fixing ring 11 and a plurality of fixing blocks 13, and the plurality of fixing blocks 13 are distributed in an annular manner on the surface of the front joint 1, the fixing ring 11 is threadedly connected to the surface of the front joint 1, the circumferential surface of the inner wall of the fixing ring 11 corresponds to the fixing block 13, the top of the fixing block 13 is an arc, and the top of the fixing block 13 is higher than the circumferential surface of the inner wall of the fixing ring 11, the fixing block 13 is elastic, and a hexagonal sleeve 12 is provided on the surface of the fixing ring 11;

[0037] The fixing ring 11 is rotated to make the fixing ring 11 close to the fixing block 13 and compress the fixing block 13 so that the fixing block 13 generates a reaction force acting on the front joint 1, thereby improving the firmness of the connection between the front joint 1 and the plug stopper 9.

[0038] With the above structure, the plug 2 is inserted into the front joint 1, the reducing screw 4 is threadedly connected to the sleeve 7, the sleeve 7 is inserted into the front joint 1, and the reducing screw 4 is passed through the special hardware 3, and finally the plug stopper 9 is inserted into the front joint 1, and the plug stopper 9 is threadedly connected with the reducing screw 4. The sleeve 7 cannot be separated from the front joint 1 through the cooperation of the plug stopper 9, the special hardware 3 and the reducing screw 4;

[0039] The parts of the front joint 1 corresponding to the plug stopper 9 and the sleeve 7 are tightened by the fastening assembly 8 and the clamp 6 to improve the stability of the connection between the sleeve 7 and the plug stopper 9 and the front joint 1.

[0040] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A plugging device replacing an insulating plug cap, characterized in that: It comprises a front joint (1), wherein the front joint (1) has a T-shaped channel inside, and the T-shaped channel is composed of a transverse channel and a vertical channel; A plug (2) is inserted into the vertical channel of the front joint (1), and a special hardware (3) is provided at the end of the plug (2), and the special hardware (3) is gap-matched with the inner wall of the transverse channel of the front joint (1); The special hardware (3) is internally threadedly connected to a reducing screw (4), a sleeve (7) and a stopper head (9) are inserted into the transverse channel of the front joint (1), and the sleeve (7) and the stopper head (9) are distributed on both sides of the special hardware (3) and are both threadedly connected to the reducing screw (4).

2. A plugging device replacing an insulating plug cap according to claim 1, characterized in that: The plug (2), sleeve (7) and stopper (9) are all in clearance fit with the inner wall of the T-shaped channel of the front joint (1).

3. A plugging device replacing an insulating plug cap according to claim 1, characterized in that: The special hardware (3) is threadedly connected to the end of the plug (2).

4. A plugging device replacing an insulating sealing cap according to claim 1, characterized in that: The end of the stopper head (9) facing away from the sleeve (7) is provided with a nut (10).

5. A plugging device replacing an insulating sealing cap according to claim 1, characterized in that: The plug (2), sleeve (7) and stopper head (9) are all truncated cone-shaped, and the opposite ends of the sleeve (7) and stopper head (9) are in contact with two sides of the special hardware (3) respectively.

6. A plugging device replacing an insulating sealing cap according to claim 1, characterized in that: The surface of the front joint (1) is provided with an annular groove (5), and a clamp (6) is sleeved on the annular groove (5), and the clamp (6) corresponds to the sleeve (7).

7. A plugging device replacing an insulating sealing cap according to claim 1, characterized in that: The surface of the front joint (1) is provided with a fastening assembly (8) for tightening the portion of the front joint (1) corresponding to the plug stopper (9).

8. A plugging device replacing an insulating sealing cap according to claim 7, characterized in that: The fastening assembly (8) comprises a fixing ring (11) and a plurality of fixing blocks (13), wherein the plurality of fixing blocks (13) are distributed in an annular manner on the surface of the front joint (1), the fixing ring (11) is threadedly connected to the surface of the front joint (1), the circumferential surface of the inner wall of the fixing ring (11) corresponds to the fixing block (13), the top of the fixing block (13) is an arc, and the top of the fixing block (13) is higher than the circumferential surface of the inner wall of the fixing ring (11), the fixing block (13) is elastic, and the surface of the fixing ring (11) is provided with a hexagonal sleeve (12).

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