CN111864415B - Jointing clamp and low-voltage equipment replacement method based on same - Google Patents
Jointing clamp and low-voltage equipment replacement method based on same Download PDFInfo
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- CN111864415B CN111864415B CN202010529033.0A CN202010529033A CN111864415B CN 111864415 B CN111864415 B CN 111864415B CN 202010529033 A CN202010529033 A CN 202010529033A CN 111864415 B CN111864415 B CN 111864415B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
- H01R4/2445—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2475—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2495—Insulation penetration combined with permanent deformation of the contact member, e.g. crimping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/16—Fastening of connecting parts to base or case; Insulating connecting parts from base or case
- H01R9/18—Fastening by means of screw or nut
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- Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention relates to the technical field of distribution network operation and maintenance equipment, in particular to a jointing clamp and a low-voltage equipment replacement method based on the jointing clamp. The substantial effects of the invention are as follows: the broken edge piece is few, and area of contact is big, has improved the reposition of redundant personnel ability of branch line, only produces a small amount of flattening deformation to the wire core, does not produce to cut the wire core surface and brokenly, and is little to the electric conductivity influence of wire core itself, when changing low-voltage equipment, need not have a power failure, has improved user experience.
Description
Technical Field
The invention relates to the technical field of distribution network operation and maintenance equipment, in particular to a wiring clamp and a low-voltage equipment replacement method based on the wiring clamp.
Background
Due to the change of user distribution and load in the distribution network, the distribution network is subject to line upgrading and reconstruction. Distribution equipment in a distribution network typically has a designed age and requires replacement, such as meter replacement, after the age has been reached. In the past, when a branch line is connected or a meter is replaced, the power-off operation is needed. Distribution lines typically use insulated cables for the distribution of electrical power. The puncture fastener can connect the branch line under the electrified condition of insulated cable, very big the upgrading transformation construction of having made things convenient for the distribution network on a small scale. Make a large amount of constructions that need the outage to go on, can both design and accomplish the construction scheme under the uninterrupted power with the help of the puncture fastener. However, the puncture wire clamp has the following defects: (1) the puncture wire clamp and the lead core are in point contact, so that the shunting capacity is poor; (2) in actual use, the prick of the puncture clamp can not be perfectly aligned with the wire core, so that part of the prick penetrates into the wire core, and the other part of the prick is not contacted with the wire core. There is a need for improved wire clips to increase their electrical conductivity.
Chinese patent CN210040575U, published 2020, 02/07/a, a micro-damage puncture type binding clip, which comprises an upper clamp plate and a lower clamp plate, wherein the upper clamp plate is connected with the lower clamp plate through screws, a puncture head for puncturing a wire insulation layer is arranged in the lower clamp plate, and a lead is arranged on the lower clamp plate. Although the insulation damage to the line is small, the safety accident caused by the fact that a person touches the exposed wire can be avoided by the mode of obtaining the voltage in a penetrating mode. However, it cannot ensure whether the piercing contact is good or not, and the piercing point contact resistance is high, which is not suitable for shunting operation.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the current jointing clamp has poor conductivity. The wiring clamp has a larger contact area relative to a puncture wire clamp, and is suitable for shunting and further applied to uninterrupted replacement of low-voltage equipment.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a jointing clamp for the uninterrupted replacement of low-voltage equipment comprises an upper clamping block, a lower clamping block, a plurality of skin breaking screws and a plurality of jointing heads, the upper clamping block and the lower clamping block form a threading hole for accommodating a lead when being jointed, the lead is basically fixed in the threading hole, a plurality of the skin breaking screws are screwed into the upper clamping block along the radial direction of the threading hole, the tail part of the skin breaking screw is a flat end surface, a groove is processed at the tail part of the skin breaking screw, the tail part of the skin breaking screw breaks the wire insulation skin and is contacted with the wire core along with the screwing-in of the skin breaking screw, the shape of the outer edge of the head of the skin breaking screw is matched with a tool for screwing the screw, a blind hole is processed at the head of the skin breaking screw, an internal thread which has the same rotation direction with the middle thread is processed at the inner wall of the blind hole, the connector lug has with the external screw thread that the internal thread matches, connector lug and broken skin screw are the conductor. The convex skin breaking screw tail can improve the skin breaking effect, but can lead to final and conductor core contact surface to reduce by a wide margin, and the area with the conductor core contact surface can be improved to the skin breaking screw tail of concave yield, but can lead to the skin breaking difficulty, probably can't accomplish the breaking of insulating skin. The principle of this technical scheme brokenly the skin is when broken skin screw is twisted in, at first causes the extrusion to insulating skin, and the groove of opening simultaneously makes during the partial insulating skin card goes into the groove, brokenly the skin screw and continues to rotate, and the insulating skin in the card goes into the groove forms along with rotatory: (1) the insulation skin in the clamping groove tears the insulation skin around to form a crevasse, (2) the smooth tail end face of the skin-breaking screw pushes the insulation skin with the crevasse to make the insulation skin deform and retreat to the periphery, so that the crevasse is enlarged, and finally the insulation skin crevasse with few chips and large crevasse is formed. Broken skin screw and wire core butt back carry out a small amount of precession again, make broken skin screw afterbody and wire core all take place a small amount of deformations, make the line contact enlarge into the face contact, promote the conducting capacity of binding clip by a wide margin. The tail part of the skin breaking screw is mainly a flat surface, so that the deformation of the wire core is the integral flattening, the surface layer of the wire core cannot be cut and cut, and the conductivity of the wire core is not greatly influenced by a small amount of deformation under the condition that the surface layer of the metal conductor is not cut and cut.
Preferably, the tail part of the skin breaking screw is provided with a straight groove or a cross groove. The straight groove or the cross groove is easy to process at the tail part of the skin breaking screw, and the shape of the groove can be better ensured to be processed.
Preferably, the tail part of the skin breaking screw is provided with a straight groove, and the hardness of the head part of the skin breaking screw is smaller than that of the lead core. The straight groove is simple to process, and has smaller damage to the wire core and larger contact surface.
Preferably, in the screwing-in process of the skin breaking screw, when the tail part of the skin breaking screw is firstly contacted with the insulating skin, the extending direction of the straight groove at the tail part of the skin breaking screw is basically parallel to the extending direction of the threading hole. More insulating skins can be clamped in, and the skin breaking effect is improved.
Preferably, the clamping device further comprises a plurality of fastening screws, the upper clamping block is provided with a plurality of through holes for allowing the fastening screws to pass through, the lower clamping block is provided with blind holes corresponding to the through holes in number and position, internal threads are formed in the blind holes, the fastening screws penetrate through the upper clamping block and then are in threaded connection with the lower clamping block, and elastic gaskets are placed between the fastening screws and the upper clamping block. The elastic gasket can prevent the upper clamping block and the lower clamping block from loosening, and the safety of the wiring clamp is ensured when the wiring clamp is used for a long time.
Preferably, the skin-breaking screw further comprises a mouth-breaking knife, the mouth-breaking knife comprises a knife body and a cutting edge, the rear portion of the knife body is located in the straight groove, a bur extends outwards from the middle of the knife body and is clamped on two sides of the straight groove of the tail end face of the skin-breaking screw, the front end face of the knife body slightly protrudes out of the tail end face of the skin-breaking screw, a rectangular platform is arranged on the front end face of the knife body, the length of the rectangular platform is along the extending direction of the straight groove, the cutting edge is along the extending direction of the straight groove, and the cutting edge is embedded in the rectangular platform and slightly protrudes out of the rectangular platform. The cutting edge cuts out a breach on insulated wire's insulating skin, and then rectangle platform and insulating skin contact, and the rectangle platform is not sharp, along with the wrong income of broken skin screw, can make the cutter body bear great reaction force, makes the spur fracture, and then cutter body and cutting edge can be crowded into the straight flute, no longer causes the influence to insulated wire, and the breach that the cutting edge was originally cut helps broken the insulating skin of broken skin screw open wire, improves broken skin effect.
Preferably, the bottom of the blind hole at the head of the broken screw is provided with a boss-shaped bulge, and the head of the connector lug is provided with a plane which is abutted with the boss-shaped bulge. The contact area of the skin breaking screw and the connector lug is increased, the contact resistance is reduced, and the shunt capacity is ensured.
A method for replacing a low-voltage device based on a terminal clamp as according to the preceding, comprising the following steps: A) clamping the wire by using the upper clamping block and the lower clamping block to fix the upper clamping block and the lower clamping block; B) screwing the skin breaking screw to enable the skin breaking screw to basically rotate to a preset depth; C) all incoming lines and outgoing lines of the replaced low-voltage equipment are connected with the skin breaking screws; D) screwing the connector lug into the head of the broken rubber screw, and short-circuiting the in-phase incoming line of the low-voltage equipment and the connector lug corresponding to the outgoing line by using a lead; E) disassembling the incoming line and the outgoing line from the low-voltage equipment to be replaced, and then connecting the incoming line and the outgoing line into new low-voltage equipment; F) and (4) removing the lead connected with the connector lug, removing the connector lug, plugging the head of the broken screw and finishing the replacement of the low-voltage equipment. Through short circuit with low-voltage equipment, make it withdraw from and join in marriage the net to can implement the change, when changing low-voltage equipment, need not have a power failure, improved user experience.
Preferably, before step a), the following steps are performed: screwing the skin breaking screw into the upper clamping block, and adjusting the screwing depth of the skin breaking screw to enable the skin breaking screw to be located at the preset depth; and in the step B), when the skin breaking screw is screwed, screwing for a preset number of turns. Through the pre-installation, the screwing-in depth of the skin breaking screw is conveniently unified, and the wiring reliability is improved.
The substantial effects of the invention are as follows: the broken edge piece is few, and area of contact is big, has improved the reposition of redundant personnel ability of branch line, only produces a small amount of flattening deformation to the wire core, does not produce to cut the wire core surface and brokenly, and is little to the electric conductivity influence of wire core itself, when changing low-voltage equipment, need not have a power failure, has improved user experience.
Drawings
Fig. 1 is a schematic view of a structure of a wire clamp according to an embodiment.
Fig. 2 is a schematic cross-sectional view of a clip according to an embodiment.
Fig. 3 is a schematic cross-sectional view of a skin-breaking screw according to an embodiment.
Fig. 4 is a schematic side view of a skin-breaking screw according to an embodiment.
Fig. 5 is a schematic structural view of a skin-breaking screw according to an embodiment.
FIG. 6 is a schematic diagram illustrating a peeling effect according to an embodiment.
FIG. 7 is a diagram illustrating the effect of a pair of wire cores according to an embodiment.
Wherein: 1. the wire guide structure comprises a lower clamping block, 2, an upper clamping block, 3, a fastening screw, 4, a skin breaking screw, 5, a wire core, 6, an insulating skin, 7, a gasket, 8, a threading hole, 401, a head, 402, a bulge, 403, a threaded part, 404, a tail, 405, a straight groove, 406, a cutter body, 407, a platform, 408, a blade, 409, a spur, 4-1, two blades, 4-2, a cross groove, 4-3 and four blades.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
The first embodiment is as follows:
a jointing clamp is used for the uninterrupted replacement of low-voltage equipment, as shown in figure 1, the embodiment comprises an upper clamping block 2, a lower clamping block 1, a plurality of skin breaking screws 4 and a plurality of jointing heads, a threading hole 8 for accommodating a lead is formed when the upper clamping block 2 is jointed with the lower clamping block 1, the lead is basically fixed in the threading hole 8, as shown in figure 2, the plurality of skin breaking screws 4 are screwed into the upper clamping block 2 along the radial direction of the threading hole 8, the tail part 404 of each skin breaking screw 4 is a flat end surface, the tail part 404 of each skin breaking screw 4 is provided with a groove, along with the screwing of each skin breaking screw 4, the tail part 404 of each skin breaking screw 4 breaks a lead insulating skin 6 and is contacted with a lead core 5, the outer edge shape of the head part 401 of each skin breaking screw 4 is matched with a tool for screwing the screw, the head part 401 of each skin breaking screw 4 is provided with a blind hole, the inner wall of each blind hole is provided with an inner thread which is in the same direction as the middle thread of the blind hole, and each jointing head is provided with an outer thread matched with the inner thread, the connector lug and the skin breaking screw 4 are both conductors. As shown in fig. 5, a straight groove 405 is processed at the tail 404 of the skin breaking screw 4, the thread part 403 of the skin breaking screw 4 is in threaded connection with the upper clamping block 2, and the hardness of the head 401 of the skin breaking screw 4 is less than that of the lead wire core 5.
In the screwing-in process of the skin breaking screw 4, when the tail 404 of the skin breaking screw 4 is firstly contacted with the insulating skin 6, the extending direction of the straight groove 405 of the tail 404 of the skin breaking screw 4 is basically parallel to the extending direction of the threading hole 8. Go up clamp splice 2 processing and have a plurality of through-holes that are used for passing fastening screw 3, lower clamp splice 1 processing has the blind hole that quantity and position correspond with the through-hole, and the blind hole processing has the internal thread, and fastening screw 3 passes behind the clamp splice 2 with 1 threaded connection of clamp splice down, places elastic gasket 7 between fastening screw 3 and the last clamp splice 2.
As shown in fig. 3 and 4, the hole breaking knife includes a knife body 406 and a knife edge 408, the rear portion of the knife body 406 is located in a straight groove 405, a protruding spine 409 extends outwards from the middle portion of the knife body 406, the protruding spine 409 is clamped at two sides of the straight groove 405 on the end surface of the tail portion 404 of the bark breaking screw 4, the end surface of the front portion of the knife body 406 slightly protrudes from the end surface of the tail portion 404 of the bark breaking screw 4, the end surface of the front portion of the knife body 406 has a rectangular platform 407, the length of the rectangular platform 407 is along the extending direction of the straight groove 405, the knife edge 408 is along the extending direction of the straight groove 405, and the knife edge 408 is embedded in the rectangular platform 407 and slightly protrudes from the rectangular platform 407. The bottom of the blind hole of the head 401 of the skin breaking screw 4 is provided with a boss-shaped protrusion 402, and the head 401 of the connector lug is provided with a plane which is abutted with the boss-shaped protrusion 402. The cutting edge 408 cuts a break on the insulating sheath 6 of the insulated wire, then the rectangular platform 407 is in contact with the insulating sheath 6, the rectangular platform 407 is not sharp, the cutter body 406 can bear larger reaction force along with the screwing-in of the peeling screw 4, the bur 409 is broken, then the cutter body 406 and the cutting edge 408 can be squeezed into the straight groove 405, no influence is caused on the insulated wire, the initial cut break of the cutting edge 408 is beneficial to the peeling screw 4 to break the insulating sheath 6 of the insulated wire, and the peeling effect is improved. The contact area between the skin breaking screw 4 and the connector lug is increased, the contact resistance is reduced, and the shunting capacity is ensured.
The embodiment of the jointing clamp has the advantages that: the tail part 404 of the convex 402 of the peeling screw 4 can improve the peeling effect, but can lead to the final contact surface with the conductor core being greatly reduced, and the concave tail part 404 of the peeling screw 4 can improve the area of the contact surface with the conductor core, but can lead to the peeling difficulty and possibly can not complete the peeling of the insulating coating 6. The principle of this technical scheme broken skin is that when broken skin screw 4 was twisted in, at first caused the extrusion to insulating skin 6, the groove of opening simultaneously made during the 6 stuck grooves of partial insulating skin, broken skin screw 4 continued the rotation, and the insulating skin 6 in the stuck groove formed along with the rotation: (1) the insulation skin 6 clamped in the groove tears the insulation skin 6 around to form a crevasse, (2) the smooth tail 404 end surface of the skin-breaking screw 4 pushes the insulation skin 6 with the crevasse to make the insulation skin deform around, so as to enlarge the crevasse, and finally the insulation skin 6 with less scraps and large crevasse is formed. Broken skin screw 4 and wire core 5 butt back carry out a small amount of precession again, make broken skin screw 4 afterbody 404 and wire core 5 all take place a small amount of deformations, make the line contact enlarge into the face contact, promote the conducting capacity of binding clip by a wide margin. The tail 404 of the skin breaking screw 4 is mainly a flat surface, so that the deformation of the wire core 5 is the integral flattening, the surface layer of the wire core 5 cannot be cut and cut, and a small amount of deformation has little influence on the conductivity of the metal conductor when the surface layer of the metal conductor is not cut and broken.
A method for replacing a low-voltage device based on a terminal clamp as according to the preceding, comprising the following steps: A) clamping the wire by using the upper clamping block 2 and the lower clamping block 1 to fix the upper clamping block 2 and the lower clamping block 1; B) screwing the skin breaking screw 4 to enable the skin breaking screw 4 to basically rotate to a preset depth; C) all incoming lines and outgoing lines of the replaced low-voltage equipment are connected with the skin breaking screws 4; D) screwing the connector lug into the head 401 of the skin breaking screw 4, and short-circuiting the connector lug corresponding to the in-phase incoming line and the outgoing line of the low-voltage equipment by using a lead; E) disassembling the incoming line and the outgoing line from the low-voltage equipment to be replaced, and then connecting the incoming line and the outgoing line into new low-voltage equipment; F) and (3) removing the lead connected with the connector lug, removing the connector lug, plugging the head 401 of the skin breaking screw 4, and finishing the replacement of the low-voltage equipment. Through short circuit with low-voltage equipment, make it withdraw from and join in marriage the net to can implement the change, when changing low-voltage equipment, need not have a power failure, improved user experience.
Before the step A) is executed, executing the following steps: screwing the skin breaking screw 4 into the upper clamping block 2, and adjusting the screwing depth of the skin breaking screw 4 to enable the skin breaking screw to be positioned at a preset depth; in the step B), when the skin breaking screw 4 is screwed, a preset number of turns are screwed. Through the pre-installation, the screwing-in depth of the skin breaking screw 4 is conveniently unified, and the wiring reliability is improved.
Comparative example:
in this comparative example, the tail 404 of the skin breaking screw 4 was compared with four embodiments: namely a, straight flute 405, b, cross flute 4-2, c, two blades 4-1 and d, four blades 4-3. As shown in fig. 6, the two blades 4-1 are two end milling blades machined on the tail 404 of the skin breaking screw 44, and the four blades 4-3 are four end milling blades machined on the tail 404 of the skin breaking screw 4. The straight groove 405 or the cross groove 4-2 is easy to machine at the tail part 404 of the skin breaking screw 4, and the shape of the groove can be better guaranteed to be machined.
As can be seen from fig. 6:
(1) the straight groove 405 eventually has the largest area of crust breaking, i.e. the best connection contact can be made.
(2) The end face of the tail part 404 of the skin breaking screw 4 of the straight groove 405 has the largest flat area, and the contact area with the lead core 5 is also the largest.
(3) The straight groove 405 has almost no cutting effect on the insulating sheath 6, no cutting trace is seen on the broken opening of the insulating sheath 6, the cross groove 4-2 has a slight cutting trace, and the two edges 4-1 and the four edges 4-3 obviously cut the insulating sheath 67. The straight flutes 405 produce minimal fine chips. The larger piece of insulation skin 6 piece that drops in the figure originally inlays in straight flute 405, drops when taking out and shooing.
As can be seen from fig. 7:
(4) the straight groove 405 affects the wire core 5 mainly by crush deformation, flattening it, and causing substantially no damage to the surface layer of the wire core 5. The cross groove 4-2 scrapes the surface layer of the conductor core 5 to form a polished area. The two edges 4-1 have scraping and a small amount of cutting, while the four edges 4-3 obviously cut the wire core 5 to form an irregular section, so that the electric conduction capability of the wire core 5 is damaged most. The damage of the straight groove 405 and the two blades 4-1 to the wire core 5 is respectively less than the damage of the cross groove 4-2 and the four blades 4-3 to the wire core 5.
With reference to fig. 6 and 7, the effect of the skin breaking screw 4 on the insulation skin 6 is not a cutting effect, but a tearing and pressing effect. In this comparative example, the scale of the pierce screw 4 used was M6x1, i.e., the pitch was 1mm, and the thickness of the insulation sheath 6 of the wire was 1.2mm, which was slightly larger than the pitch of the pierce screw 4. That means, the tail part 404 of the skin breaking screw 4 rotates only a little more than 1 turn from just contacting the insulation skin 6 to finishing the skin breaking, and advances 1mm during the 1 turn of the rotation, and the two edges 4-1 and the four edges 4-3 are not in time to finish the cutting process due to the too small number of turns of the rotation, so that the skin breaking area is smaller than that of the straight groove 405 in fig. 6.
The above embodiment is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the technical scope of the claims.
Claims (6)
1. A jointing clamp is used for uninterrupted replacement of low-voltage equipment and is characterized in that,
comprises an upper clamping block, a lower clamping block, a plurality of skin breaking screws and a plurality of connector lugs, wherein a threading hole for accommodating a lead is formed when the upper clamping block and the lower clamping block are jointed, the lead is basically fixed in the threading hole, the plurality of skin breaking screws are screwed into the upper clamping block along the radial direction of the threading hole, the tail part of the skin breaking screw is a flat end surface, a groove is processed at the tail part of the skin breaking screw, the tail part of the skin breaking screw breaks the wire insulation skin and is contacted with the wire core along with the screwing-in of the skin breaking screw, the shape of the outer edge of the head of the skin breaking screw is matched with a tool for screwing the screw, a blind hole is processed at the head of the skin breaking screw, an internal thread which has the same direction of rotation with the middle thread of the skin breaking screw is processed at the inner wall of the blind hole, the connector lug is provided with an external thread matched with the internal thread, the connector lug and the skin breaking screw are both conductors, the tail part of the skin breaking screw is provided with a straight groove, and the hardness of the head part of the skin breaking screw is smaller than that of the lead core; still include the brokenly mouth sword, the brokenly mouth sword includes cutter body and cutting edge, the cutter body rear portion is located the straight flute, the outside extension in cutter body middle part has the spur, the spur card is in the straight flute both sides of broken skin screw afterbody terminal surface, the anterior terminal surface of cutter body slightly protrudes broken skin screw afterbody terminal surface, and the anterior terminal surface of cutter body has the rectangle platform, and the extending direction of straight flute is followed to the length of rectangle platform, the extending direction of straight flute is followed to the cutting edge, and the cutting edge is inlayed and is slightly outstanding rectangle platform in the rectangle platform.
2. A terminal clamp according to claim 1,
in the screwing-in process of the skin breaking screw, when the tail part of the skin breaking screw is firstly contacted with the insulating skin, the extending direction of the straight groove at the tail part of the skin breaking screw is basically parallel to the extending direction of the threading hole.
3. A terminal clamp according to claim 1 or 2,
still include a plurality of fastening screw, it has a plurality of through-holes that are used for passing fastening screw to go up clamp splice processing, clamp splice processing down have quantity and position with the blind hole that the through-hole corresponds, the blind hole processing that the through-hole corresponds has the internal thread, fastening screw pass after the clamp splice with clamp splice threaded connection down, have placed the elastic gasket between fastening screw and the last clamp splice.
4. A terminal clamp according to claim 3,
the bottom of the blind hole at the head of the broken leather screw is provided with a boss-shaped bulge, and the head of the connector lug is provided with a plane which is abutted to the boss-shaped bulge.
5. A low-voltage device replacement method based on the terminal clamp of any one of claims 1 to 4,
the method comprises the following steps:
A) clamping the wire by using the upper clamping block and the lower clamping block to fix the upper clamping block and the lower clamping block;
B) screwing the skin breaking screw to enable the skin breaking screw to basically rotate to a preset depth;
C) all incoming lines and outgoing lines of the replaced low-voltage equipment are connected with the skin breaking screws;
D) screwing the connector lug into the head of the broken rubber screw, and short-circuiting the in-phase incoming line of the low-voltage equipment and the connector lug corresponding to the outgoing line by using a lead;
E) the incoming line and the outgoing line are detached from the low-voltage equipment to be replaced, and then the incoming line and the outgoing line are connected into new low-voltage equipment;
F) and (4) removing the lead connected with the connector lug, removing the connector lug, plugging the head of the broken screw and finishing the replacement of the low-voltage equipment.
6. The low voltage device replacement method of claim 5,
before the step A) is executed, executing the following steps:
screwing the skin breaking screw into the upper clamping block, and adjusting the screwing depth of the skin breaking screw to enable the skin breaking screw to be located at the preset depth;
and in the step B), when the skin breaking screw is screwed, screwing for a preset number of turns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010529033.0A CN111864415B (en) | 2020-06-11 | 2020-06-11 | Jointing clamp and low-voltage equipment replacement method based on same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010529033.0A CN111864415B (en) | 2020-06-11 | 2020-06-11 | Jointing clamp and low-voltage equipment replacement method based on same |
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| Publication Number | Publication Date |
|---|---|
| CN111864415A CN111864415A (en) | 2020-10-30 |
| CN111864415B true CN111864415B (en) | 2022-02-18 |
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| CN202010529033.0A Active CN111864415B (en) | 2020-06-11 | 2020-06-11 | Jointing clamp and low-voltage equipment replacement method based on same |
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| CN108281962A (en) * | 2018-01-11 | 2018-07-13 | 常州全橙智能科技有限公司 | The connecton layout of cable intelligence wiring method and application this method |
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| DE102010014532A1 (en) * | 2010-04-10 | 2011-10-13 | Woertz Ag | Fire function maintenance cable and kit for an electrical installation with functional integrity in case of fire |
| CN205015377U (en) * | 2015-08-17 | 2016-02-03 | 广东天能电力设计有限公司 | A insulating fixing device for electric energy meter is electrified to be changed |
| CN108445268B (en) * | 2018-05-18 | 2024-05-14 | 上海振浩智能科技有限公司 | Uninterrupted power change device for three-phase electric energy meter |
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| CN105633611A (en) * | 2016-02-29 | 2016-06-01 | 成都科创谷科技有限公司 | Detachable jointing clamp used for computer communication network |
| CN205450050U (en) * | 2016-03-28 | 2016-08-10 | 万沙电气有限公司 | Do not cut off power supply and change instrument of electric energy meter |
| CN108281962A (en) * | 2018-01-11 | 2018-07-13 | 常州全橙智能科技有限公司 | The connecton layout of cable intelligence wiring method and application this method |
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