CN105305331A - Grounding device for T-shaped cable head - Google Patents
Grounding device for T-shaped cable head Download PDFInfo
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- CN105305331A CN105305331A CN201510818441.7A CN201510818441A CN105305331A CN 105305331 A CN105305331 A CN 105305331A CN 201510818441 A CN201510818441 A CN 201510818441A CN 105305331 A CN105305331 A CN 105305331A
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- contact site
- expansion link
- shaped cable
- round platform
- shaped
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Abstract
The invention discloses a grounding device for a T-shaped cable head to solve the problem that there is no special-purpose grounding device for a T-shaped cable head in terms of the prior art. The device is a contact part that includes a left contact part and a right contact part. The contact part is shaped like a combination of a cylinder and a truncated cone, the center of the bottom surface of the cylinder and the center of the bottom of the truncated cone coincide, the lower bottom surface of the truncated cone is smaller than the bottom surface of the cylinder, and the left contact part and the right contact part exhibit plane symmetry relative to the top surface of the truncated cone. A fixing frame is a rectangular frame formed by four plate-shaped materials that are connected end to end, the left side and the right side of the rectangular frame are each equipped with a hole, a bucket-shaped fixed end extends from each hole, and the inner wall of each fixed end is equipped with threads. A telescoping rod includes a left telescoping rod and a right telescoping rod. The outside of the telescoping rod is equipped with threads that fit the inner wall of each fixed end. One end of the telescoping rod is connected to the bottom surface of the cylinder of the contact part, and the other end of the telescoping rod extends and passes through a dustproof sheath and the fixed ends of the fixing frame. The device has an effective grounding effect when a T-shaped cable head is pulled out.
Description
Technical field
The present invention relates to substation grounding apparatus field, particularly relate to a kind of T-shaped cable end earthing device.
Background technology
Earth connection is the visual plant guaranteeing electric equipment and personal safety; for guaranteeing work safety in power failure equipments or circuit; hanging earthing conductor is one safety curtain of protection maintainer, is the lifeline of electrical employee, can prevents industrial electrical equipment from sending a telegram here suddenly to the injury of human body." State Grid Corporation of China's electric power safety working regulation " specifies, after power failure, identify equipment or circuit not charged, also must hanging earthing conductor, and specify: " the complete earth connection that earth connection should have ground connection and short-circuit conductors to form ".Complete earth connection is applied and is made up of the multiply annealed copper wire of transparent sheath and Special wire-clip, and earth connection sectional area should meet the requirement of installing place short circuit current, and the sectional area of high-voltage grounding wire must not be less than 25 square millimeters.Earth connection should use special wire clamp to be fixed on conductor, forbids the method ground connection with being wound around or short circuit.Prohibit the use other wired earth or short circuit.
The line interval of ring main unit, feeder pillar is made up of on-load switch or circuit interrupter grounding switch; when cable end is not removed; earthing can ensure line cable reliable ground; but when changing ring main unit, feeder pillar or changing cable separation; after cable end is removed; line cable will lose ground protection needs cable terminal to take, and now main power source end cable head is in unprotect state, need install earth connection to ensure work safety at cable end.
Due to the special construction of T-shaped cable terminal, common earth connection cannot be used, rear installing can only be removed, T-shaped cable end after dismounting will be discarded, or adopt the method installing earth connection in user side, but subscriber's drop equipment without switch without ground cutter, installing difficulty is high, the T-shape cable end taken needs to protect field operation personnel at user side installing earthing device, take time and effort, and be installed in user side due to earthing device, special messenger need be sent to guard, poor controllability, there is potential safety hazard, by looking into new discovery, there is no T-shape cable end Special grounding device at present.
Summary of the invention
The embodiment of the present invention provides a kind of T-shaped cable end earthing device, in order to solve in prior art the problem existed without the special earthing device of T-shaped cable end.
The embodiment of the present invention provides a kind of T-shaped cable end earthing device, and this device comprises: contact site, fixed mount, expansion link and dust-proof sheath; Contact site comprises left contact site and right contact site, the shape of contact site is the assembly of cylinder and round platform, the center of circle of cylindrical bottom surface overlaps with the center of circle of round platform bottom surface, the bottom surface of round platform is less than cylindrical bottom surface, left contact site and right contact site are that face is symmetrical relative to the upper bottom surface of round platform, the round platform upper bottom surface of left contact site is used for and the binding post one side of T-shaped cable end contacts, and the round platform upper bottom surface of right contact site is used for and the binding post another side of T-shaped cable end contacts;
Fixed mount is the end to end rectangle frame of four board-like materials, and the right and left of rectangle frame is respectively arranged with a hole, and a barrel-shaped stiff end is extended at hole place, and stiff end inwall has screw thread, and the left side is left stiff end, and the right is right stiff end;
Expansion link comprises left expansion link and right expansion link, outside is provided with the screw thread coordinated with stiff end inwall, one end of left expansion link is connected with the cylinder bottom surface of left contact site, the other end stretches out and passes the left stiff end of left dust-proof sheath and fixed mount, one end of right expansion link is connected with the cylinder bottom surface of right contact site, and the other end stretches out and passes the right stiff end of right dust-proof sheath and fixed mount.
Preferably, device also comprises insulating bar, and the part that one end and the expansion link of insulating bar stretch out fixed mount is connected.
Preferably, the material of dust-proof sheath is rubber, and shape is discoid, is placed on T-shaped cable end both ends open place.
Beneficial effect of the present invention comprises: its earth resistance meets electric power safety production requirement, every pass the test such as short circuit current, good airproof performance, occupational dusts can be stoped to enter T-shaped cable end, and this grounding device constructions is simple, easy to operate, the three-phase set-up time is short, improves operating efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the T-shaped cable end earthing device in the embodiment of the present invention;
Fig. 2 is the structural representation that T-shaped cable end earthing device in the embodiment of the present invention and T-shaped cable end assemble.
Embodiment
In order to provide the earthing device that can directly be installed on the T-shaped cable end of excision, ensure the implementation of job site safety, embodiments provide a kind of T-shaped cable end earthing device, below in conjunction with Figure of description, the preferred embodiments of the present invention are described.
T-shaped cable joint is formed primarily of T-shaped insulated electro cable end and cable terminal binding post, and due to the effect of stress cone and insulation silicone grease, binding post is difficult to pull out from T-shaped cable end.Installing earth connection is wanted to destroy T connector.
Consult shown in Fig. 1 and Fig. 2, the embodiment of the present invention provides a kind of T-shaped cable end earthing device, limited space in T-shape head, cable termination line nose bare area is limited, contact-making surface need be increased to connect as far as possible, reduce contact resistance, earth connection need be designed to telescopic in addition, so the contact resistance of rotatable connecting portion also must control within claimed range, select in the design process electric conducting material, the connecting portion conducted electricity very well connect reliable, select the suitable way of contact can meet the requirement of electrical production safety.
This device comprises: contact site, fixed mount, expansion link and dust-proof sheath.
Wherein, contact site comprises left contact site and right contact site, the shape of contact site is the assembly of cylinder and round platform, the center of circle of cylindrical bottom surface overlaps with the center of circle of round platform bottom surface, the bottom surface of round platform is less than cylindrical bottom surface, left contact site and right contact site are that face is symmetrical relative to the upper bottom surface of round platform, and the round platform upper bottom surface of left contact site is used for and the binding post one side of T-shaped cable end contacts, and the round platform upper bottom surface of right contact site is used for and the binding post another side of T-shaped cable end contacts.The contact site of this structure can effectively and binding post form maximum contact area, reduce contact resistance.
Fixed mount is the end to end rectangle frame of four board-like materials, and the right and left of rectangle frame is respectively arranged with a hole, and a barrel-shaped stiff end is extended at hole place, and the left side is left stiff end, and the right is right stiff end; Stiff end inwall has screw thread, and it is firm to be connected with T connector for dead earth line.
Because there is the existence of stress cone between cable and T-shaped cable terminal, in addition when the cable end operation time limit is longer, cable terminal T connector is difficult to extract from cable, so want to carry out ground connection to cable terminal must develop a kind of extension type earth connection, stretch in T connector and be connected with cable connecting terminal.
Expansion link comprises left expansion link and right expansion link, one end of left expansion link is connected with the cylinder bottom surface of left contact site, the other end stretches out and passes the left stiff end of left dust-proof sheath and fixed mount, one end of right expansion link is connected with the cylinder bottom surface of right contact site, and the other end stretches out and passes the right stiff end of right dust-proof sheath and fixed mount.Expansion link outer wall is provided with the screw thread wanting with stiff end inwall to coordinate.
For T-shaped cable end, T-shaped cable end is the main insulation of T-shaped cable joint, and inwall must keep clean, after dust enters, can insulation level be affected, reduce insulation resistance, cause the generation of heating burnout accident, T-shaped cable end structure is simple, regular, both-side opening, only need use two rubber sheaths, therefore, the earth connection developed must meet sealing requirements under the satisfactory prerequisite of guarantee earth resistance, prevents dust from entering.
This device also comprises insulating bar, and the part that one end and the expansion link of insulating bar stretch out fixed mount is connected.Form according to bayonet-type bulb sits dismountable insulating bar, the High Performance Insulation material of specialty is adopted to make, for dead earth wire clamp, insulation safety iris action has been operated at human body and earth connection, eliminate the danger of directly contact or the undue close not yet conductor of grounding apparatus, make staff that enough safe distances can be kept to carry out operating.
The material of above-mentioned dust-proof sheath is rubber, and shape is discoid, is placed on T-shaped cable end both ends open place.Prevent dust in work progress from entering in T-shaped cable joint, impact insulation.
During use, expansion link is screwed out from fixed mount, T-shaped cable end is placed in the middle of fixed mount, dust-proof sheath is fastened from T-shaped cable end two ends, two, the left and right expansion link of contact site is had by one headband to screw in middle part, until contact site contacts with binding post, insulating bar is connected to the expansion link other end.
In sum, the scheme that the embodiment of the present invention provides, its earth resistance meets electric power safety production requirement, every pass the test such as short circuit current, good airproof performance, can stop occupational dusts to enter T-shaped cable end, and this grounding device constructions is simple, easy to operate, the three-phase set-up time is short, improves operating efficiency.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (3)
1. a T-shaped cable end earthing device, is characterized in that, described device comprises: contact site, fixed mount, expansion link and dust-proof sheath; Contact site comprises left contact site and right contact site, the shape of contact site is the assembly of cylinder and round platform, the center of circle of cylindrical bottom surface overlaps with the center of circle of round platform bottom surface, the bottom surface of round platform is less than cylindrical bottom surface, left contact site and right contact site are that face is symmetrical relative to the upper bottom surface of round platform, the round platform upper bottom surface of left contact site is used for and the binding post one side of T-shaped cable end contacts, and the round platform upper bottom surface of right contact site is used for and the binding post another side of T-shaped cable end contacts;
Fixed mount is the end to end rectangle frame of four board-like materials, and the right and left of rectangle frame is respectively arranged with a hole, and a barrel-shaped stiff end is extended at hole place, and stiff end inwall has screw thread, and the left side is left stiff end, and the right is right stiff end;
Expansion link comprises left expansion link and right expansion link, outside is provided with the screw thread coordinated with stiff end inwall, one end of left expansion link is connected with the cylinder bottom surface of left contact site, the other end stretches out and passes the left stiff end of left dust-proof sheath and fixed mount, one end of right expansion link is connected with the cylinder bottom surface of right contact site, and the other end stretches out and passes the right stiff end of right dust-proof sheath and fixed mount.
2. device as claimed in claim 1, it is characterized in that, described device also comprises insulating bar, and the part that one end and the expansion link of insulating bar stretch out fixed mount is connected.
3. device as claimed in claim 1, it is characterized in that, the material of described dust-proof sheath is rubber, and shape is discoid, is placed on T-shaped cable end both ends open place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510818441.7A CN105305331B (en) | 2015-11-23 | 2015-11-23 | T-shaped end earthing or grounding means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510818441.7A CN105305331B (en) | 2015-11-23 | 2015-11-23 | T-shaped end earthing or grounding means |
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| Publication Number | Publication Date |
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| CN105305331A true CN105305331A (en) | 2016-02-03 |
| CN105305331B CN105305331B (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510818441.7A Active CN105305331B (en) | 2015-11-23 | 2015-11-23 | T-shaped end earthing or grounding means |
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| CN (1) | CN105305331B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710840A (en) * | 2017-03-14 | 2017-05-24 | 国网江苏省电力公司泗洪县供电公司 | Grounding line mounting opening insulation device |
| CN106786105A (en) * | 2017-01-16 | 2017-05-31 | 国网安徽省电力公司宣城供电公司 | A kind of switch cabinet bus static contact earthing or grounding means |
| CN107202912A (en) * | 2017-07-12 | 2017-09-26 | 国家电网公司 | Cable testing aid containing T-shaped terminal |
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| CN201061118Y (en) * | 2007-04-27 | 2008-05-14 | 安迪普科技(深圳)有限公司 | Intermediate joint of cable |
| CN202340094U (en) * | 2011-12-12 | 2012-07-18 | 辽宁省电力有限公司锦州供电公司 | Pluggable prefabricated cable terminal grounding device |
| CN102780195A (en) * | 2012-07-27 | 2012-11-14 | 中国二十二冶集团有限公司 | 10-35KV cold-shrink cable terminal and manufacture method thereof |
| CN204257848U (en) * | 2014-10-16 | 2015-04-08 | 内蒙古电力(集团)有限责任公司鄂尔多斯电业局东胜供电分局 | A kind of T connector earthing device |
| CN204706866U (en) * | 2015-06-30 | 2015-10-14 | 国家电网公司 | The T-shaped splicing ear head of power cable |
| CN204741258U (en) * | 2015-06-30 | 2015-11-04 | 国家电网公司 | Power cable T type connecting terminal component |
| CN204760996U (en) * | 2015-06-30 | 2015-11-11 | 国家电网公司 | Power cable T type connecting terminal |
| CN205265160U (en) * | 2015-11-23 | 2016-05-25 | 国网宁夏电力公司吴忠供电公司 | T type cable head earthing device |
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2015
- 2015-11-23 CN CN201510818441.7A patent/CN105305331B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201061118Y (en) * | 2007-04-27 | 2008-05-14 | 安迪普科技(深圳)有限公司 | Intermediate joint of cable |
| CN202340094U (en) * | 2011-12-12 | 2012-07-18 | 辽宁省电力有限公司锦州供电公司 | Pluggable prefabricated cable terminal grounding device |
| CN102780195A (en) * | 2012-07-27 | 2012-11-14 | 中国二十二冶集团有限公司 | 10-35KV cold-shrink cable terminal and manufacture method thereof |
| CN204257848U (en) * | 2014-10-16 | 2015-04-08 | 内蒙古电力(集团)有限责任公司鄂尔多斯电业局东胜供电分局 | A kind of T connector earthing device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786105A (en) * | 2017-01-16 | 2017-05-31 | 国网安徽省电力公司宣城供电公司 | A kind of switch cabinet bus static contact earthing or grounding means |
| CN106786105B (en) * | 2017-01-16 | 2018-11-06 | 国网安徽省电力公司宣城供电公司 | A kind of switch cabinet bus static contact earthing or grounding means |
| CN106710840A (en) * | 2017-03-14 | 2017-05-24 | 国网江苏省电力公司泗洪县供电公司 | Grounding line mounting opening insulation device |
| CN106710840B (en) * | 2017-03-14 | 2018-03-27 | 国网江苏省电力公司泗洪县供电公司 | One kind ground wire installing port seal |
| CN107202912A (en) * | 2017-07-12 | 2017-09-26 | 国家电网公司 | Cable testing aid containing T-shaped terminal |
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| Publication number | Publication date |
|---|---|
| CN105305331B (en) | 2018-02-16 |
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