CN202373947U - Sealing assembly for protection grounding box - Google Patents
Sealing assembly for protection grounding box Download PDFInfo
- Publication number
- CN202373947U CN202373947U CN2011205211871U CN201120521187U CN202373947U CN 202373947 U CN202373947 U CN 202373947U CN 2011205211871 U CN2011205211871 U CN 2011205211871U CN 201120521187 U CN201120521187 U CN 201120521187U CN 202373947 U CN202373947 U CN 202373947U
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- rubber
- sealing assembly
- tube
- clamping
- sealing
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- Expired - Lifetime
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Abstract
The utility model discloses a sealing assembly for a protection grounding box, and relates to a sealing assembly for a cable protection grounding box in a 35kV-220kV power supply system. The sealing assembly consists of a nut, a rubber gasket, a sealing main body piece, a rubber clamping cylinder, a clamping claw and a packing head, wherein other pieces are formed by performing injection molding on a nylon raw material except the rubber gasket and the rubber clamping cylinder. The sealing assembly is environment-friendly, halogen-free, low-smoke, waterproof and reliable in sealing, and can be assembled conveniently and quickly; the range of clamping cables is wide, the excellent destressing design is provided, and cables are effectively protected; the sealing assembly has high tensile resistance, is waterproof, dustproof, salt fog resistant, acid and alkali resistant and oilproof, and has the performance of common solvents; and the sealing assembly is low in manufacturing cost, economical and practical.
Description
Technical field
The utility model relates to the seal assembly of cable protection ground connection case in the 35kV-220kV electric power system.
Background technology
The 35kV-220kV single-core cable is in running; When running into lightning wave or internal overvoltage when cable core flows; Higher impulse overvoltage can appear in the earth-free end of cable metal sheath; Maybe ought run into the system short-circuit accident, when electric current was flowed through cable core, very high line-frequency induction overvoltage also can appear in the earth-free end of cable metal sheath.Above-mentioned overvoltage possibly puncture the protective coverings of cable insulation, causes cable metal sheath multipoint earthing fault, has a strong impact on power cable and normally moves, even significantly cut down the useful life of cable.Be induced voltage and the fault overvoltage on the restriction power cable metal sheath, and avoid in sheath, forming circulation, adopted the protective earthing case at cable metal sheath one end.The protective earthing box structure form of domestic production is different, but all relates to the cable import and export sealing problem of metal coating ground connection box body.Present seal form can be divided into three kinds: a kind of is that the plug-in wiring seals; Promptly settle metal from locking the plug-in cable joint respectively at cable and ground connection case Wiring port; During installation, only need this two joints coaxial alignment is pushed and plugged connection, get final product after the joint locking device automatically locks.This kind seal form, sealing effectiveness is better, on-the-spot installation simple and fast, but the complex manufacturing technology of joint, metal material consumes more, and manufacturing cost is high, costs an arm and a leg, and the suspicion of " function is superfluous " is arranged.Second kind is to adorn a rubber bush at cable jacket to insert on the ground connection tank wall in the externally threaded metal extraction tube of tool, and screwing with nut gets final product.This kind seal form structure is too simple, and steadiness is relatively poor, and the water-tight performance is also relatively poor.The third directly inserts cable in the metal extraction tube on the tank wall, the slit filling with sealant, and the outside installs the heat-shrink tube sealing additional.This seal form cost is low, but on-the-spot installation is consuming time longer, and outward appearance is coarse, and the fixedly protectiveness of cable is relatively poor.
Summary of the invention
The purpose of the utility model is a kind of cost protective earthing case seal assembly of being processed by nonmetallic materials low, quick and easy for installation of development.
The technical scheme of the utility model provides a kind of protective earthing case and uses seal assembly; It is combined by nut, rubber sheet gasket, sealed body spare, rubber clamping tube, clamp jaw, clamping head; Wherein sealed body spare is the externally threaded reducing hollow tube of two ends tool, and an end cooperates with nut, is fixed on the tank wall through rubber sheet gasket; The other end and clamping head screw-internal thread fit, the rubber that can hold intussusception in the pipe clamps tube and clamp jaw; Clamp jaw is a tubular comb formula, and comb tooth head is the outer wedge shape of single face; Rubber clamps tube and is provided with holder and mounting board groove; Establish screw thread and limited wall in the clamping head, outer tool hexagonal is dialled hand.Sub-assembly is nylon raw material notes pressure and forms except that rubber sheet gasket and rubber clamping tube.
Compare with known technology; It is convenient that the utility model is environment-friendly type, low smoke, zero halogen, waterproof sealing is reliable, the sub-assembly assembling saves time; The clamping cables scope is wide, have good destressing design, protect cable, clamping head to be designed to the screw thread notch effectively, and is tight in the limited wall surface engagement with clamp jaw; Sub-assembly has that stretching resistance is strong, the performance of waterproof and dustproof, anti-salt fog, acid and alkali-resistance, oil resistant and common solvent, low cost of manufacture, economical and practical.
Description of drawings
Accompanying drawing is the structural representation of the utility model.
As shown in the figure, the utility model is combined by nut (1), rubber sheet gasket (2), sealed body spare (3), rubber clamping tube (4), a clamp jaw (5), clamping head (6).
7-cylinder base, 8-mounting board groove 9--anti-back card platform 10-clamping blade tooth 11-limited wall 12-cylinder base groove.
Embodiment
Specify the structure and the installation and application of the utility model below in conjunction with accompanying drawing:
At first; Nut (1) is tightened at the tank wall line inlet port place of ground protection case through rubber sheet gasket (2) and sealed body (3) external screw thread one end; Then cable is inserted in clamping head (6), clamp jaw (5), rubber clamping tube (4) successively; After passing sealed body spare (3) inner chamber cartonning wiring, rubber is clamped tube (4) push in the sealed body (3), and cylinder base (7) and cylinder base groove (12) are coincide; Again clamp jaw (5) is enclosed within rubber and clamps outside the tube (4), be tightened on clamping head (6) on the other end screw thread of body seal (3) at last.Along with the precession of clamping head (6), force the clamp jaw comb tooth (10) of clamp jaw (5) to draw in, cause rubber to clamp tube (4) and hug the cable outer wall and reach sealing.Its stress that tightens up generation is dispersed by mounting board groove (8).
The integral sealing sub-assembly is except that the mold pressing of rubber parts employing NBR makes, and other is the nylon raw material injection moulding.
Claims (2)
1. the protective earthing case is used seal assembly; It is combined by nut, rubber sheet gasket, sealed body spare, rubber clamping tube, clamp jaw, clamping head; It is characterized in that said sealed body spare is the externally threaded reducing hollow tube of two ends tool, an end cooperates with nut, is fixed on the tank wall through rubber sheet gasket; The other end and clamping head screw-internal thread fit, the rubber that can hold intussusception in the pipe clamps tube and clamp jaw; Clamp jaw is a tubular comb formula, and comb tooth head is the outer wedge shape of face only; Rubber clamps tube and is provided with holder and mounting board groove; Establish screw thread and limited wall in the clamping head, outer tool hexagonal is dialled hand.
2. use seal assembly according to claim 1 described protective earthing case, it is characterized in that used material is except that rubber sheet gasket and rubber clamping tube, to be nylon raw material notes pressure to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205211871U CN202373947U (en) | 2011-12-14 | 2011-12-14 | Sealing assembly for protection grounding box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205211871U CN202373947U (en) | 2011-12-14 | 2011-12-14 | Sealing assembly for protection grounding box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202373947U true CN202373947U (en) | 2012-08-08 |
Family
ID=46597638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205211871U Expired - Lifetime CN202373947U (en) | 2011-12-14 | 2011-12-14 | Sealing assembly for protection grounding box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202373947U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281113A (en) * | 2015-11-13 | 2016-01-27 | 无锡华昊电器股份有限公司 | Electric automobile waterproof connector |
| CN105508743A (en) * | 2016-01-08 | 2016-04-20 | 成都前宏通讯有限责任公司 | Quick coupling sealed casing |
| CN106207945A (en) * | 2016-07-25 | 2016-12-07 | 常州市拓源电缆成套有限公司 | 27500 volts of intermediate joint of electric cables for railway |
| CN109309368A (en) * | 2017-07-26 | 2019-02-05 | 中国航空工业集团公司西安飞机设计研究所 | Aircraft deckle board thread threading sealing device |
| CN111697528A (en) * | 2019-03-12 | 2020-09-22 | 杭州海康威视数字技术股份有限公司 | Cable installation mechanism and camera |
-
2011
- 2011-12-14 CN CN2011205211871U patent/CN202373947U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281113A (en) * | 2015-11-13 | 2016-01-27 | 无锡华昊电器股份有限公司 | Electric automobile waterproof connector |
| CN105508743A (en) * | 2016-01-08 | 2016-04-20 | 成都前宏通讯有限责任公司 | Quick coupling sealed casing |
| CN106207945A (en) * | 2016-07-25 | 2016-12-07 | 常州市拓源电缆成套有限公司 | 27500 volts of intermediate joint of electric cables for railway |
| CN109309368A (en) * | 2017-07-26 | 2019-02-05 | 中国航空工业集团公司西安飞机设计研究所 | Aircraft deckle board thread threading sealing device |
| CN111697528A (en) * | 2019-03-12 | 2020-09-22 | 杭州海康威视数字技术股份有限公司 | Cable installation mechanism and camera |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120808 |