CN115173350A - Strain clamp for electric power engineering - Google Patents
Strain clamp for electric power engineering Download PDFInfo
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- CN115173350A CN115173350A CN202210660013.6A CN202210660013A CN115173350A CN 115173350 A CN115173350 A CN 115173350A CN 202210660013 A CN202210660013 A CN 202210660013A CN 115173350 A CN115173350 A CN 115173350A
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- Prior art keywords
- plate
- shunt
- drainage plate
- drainage
- alarm
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The invention relates to the technical field of strain clamps, and discloses a strain clamp for electric power engineering. According to the strain clamp for the electric power engineering, the drainage plate, the connecting plate and the temperature-sensing trigger mechanism which are connected by the fastening bolt are always kept in close contact through the extrusion mechanism, so that the contact resistance is reduced, and the accuracy of the temperature sensing trigger mechanism in sensing the temperature of the drainage plate is ensured; can make it keep the on-state after triggering the reposition of redundant personnel unit through temperature sensing trigger mechanism, alleviate the condition of generating heat of drainage plate, trigger the alarm unit at temperature sensing trigger mechanism and send the police dispatch newspaper after, the reposition of redundant personnel unit can provide the time buffering for the staff accomplishes the circuit maintenance to generating heat of drainage plate is alleviated to avoid shunting unit sudden shutdown to cause the electric current through the drainage plate to sharply increase and accelerate to burn out.
Description
Technical Field
The invention relates to the technical field of strain clamps, in particular to a strain clamp for electric power engineering.
Background
The strain clamp is a hardware fitting used for fixing a lead to bear the tension of the lead and hanging the lead on a strain insulator string or a tower, and is used for fixing the lead or a lightning conductor on a strain insulator string of a non-linear tower, playing an anchoring role and also used for fixing a stay wire of a stay wire tower.
The strain clamp drainage plate generates heat and is the important factor that influences the operation of transmission line safety and stability, and the drainage plate generates heat because the fuel factor of electric current causes, and drainage plate itself has certain resistance, must have some electric energy loss when passing through the electric current to make the drainage plate temperature rise. Under the normal condition, the contact resistance of drainage plate is very little, and it generates heat can not be higher than generating heat of adjacent current-carrying wire, nevertheless the circuit is in operation in-process because the installation is not in place and invades by natural environment, and easy emergence bolt looseness, drainage plate surface filthy pile up, circuit contact point are not hard up etc. cause the increase of drainage plate contact resistance, and then lead to the drainage plate to generate heat, can cause metallic oxidation to accelerate after the drainage plate generates heat, and contact resistance is bigger, forms vicious circle, can cause the drainage plate position of generating heat to burn when serious.
The Chinese patent with the application number of CN204290224U provides a dovetail groove conical wedge type strain clamp which is not easy to loosen. The device that this patent provided can only increase drainage plate and drainage tube area of contact and make both closely cooperate through the cooperation of dovetail and toper face when the installation, owing to receive wind, rain, high temperature, the invasion of severe cold etc. when in actual application, still can appear the clearance owing to receive faint natural erosion and expend with heat and contract with cold between dovetail and the toper face, can't make drainage plate and drainage tube remain the in close contact all the time, make the contact effect reduce, cause the contact resistance increase, still can cause the drainage plate to generate heat when serious.
Chinese patent application No. CN201610546509.5 discloses a strain clamp drainage plate with a temperature control heating automatic shunt and alarm device. The bimetal temperature measuring piece in the device provided by the patent can only keep contact with one contact to realize circuit conduction, when the temperature is high enough, the bimetal temperature measuring piece is in contact with the contact of the alarm to alarm, and the shunt can be immediately stopped because the bimetal temperature measuring piece leaves the shunt conducting contact of the shunt lead, so that the current passing through the drainage plate is increased rapidly, the burning loss of the drainage plate is accelerated, and huge loss is caused; in addition, receive natural environment and invade, the unstable condition of contact may appear when bimetal temperature measuring piece contacts with the contact for even actual temperature reaches reposition of redundant personnel or warning limit, the circuit also can't switch on, and the drainage plate generates heat and can't get timely processing.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the strain clamp for the electric power engineering, which has the advantages that the drainage component can be always kept in close contact, the bimetallic strip can be used for conducting the alarm unit and simultaneously keeping the shunt unit conducted, and the like, and the problems that the drainage plate and the drainage tube cannot be always kept in close contact, and the current flowing through the drainage plate cannot be increased sharply because the bimetallic temperature measuring strip can not be simultaneously kept in shunt conduction when conducting the alarm in the prior art are solved.
(II) technical scheme
In order to solve the technical problems that the drainage plate and the drainage tube can not be always kept in close contact in the prior art, and the current flowing through the drainage plate can not be increased sharply because the double-metal temperature measuring sheet can not be kept in shunt conduction at the same time when the alarm is conducted, the invention provides the following technical scheme:
a strain clamp for electric power engineering comprises a strain clamp body, a temperature-sensing triggering mechanism, an extrusion mechanism, a shunt unit and an alarm unit, wherein the strain clamp body is used for being connected with a lead, the strain clamp body comprises a drainage plate, a connecting plate and a fastening bolt, and the drainage plate, the connecting plate and the temperature-sensing triggering mechanism are connected through the fastening bolt and are kept in close contact under the action of the extrusion mechanism so as to reduce contact resistance and ensure the temperature sensing effect of the temperature-sensing triggering mechanism on the drainage plate;
when the temperature sensed by the temperature sensing triggering mechanism reaches a first limit value, the shunting unit is triggered to shunt the wires so as to reduce the heating value of the drainage plate, if the temperature of the drainage plate rises back and continues to rise, the shunting unit can be kept conducted, and when the temperature sensed by the temperature sensing triggering mechanism reaches a second limit value, the alarm unit is triggered to give an alarm.
Preferably, the temperature-sensing trigger mechanism comprises a metal heat-conducting plate, an insulating support, a bimetallic strip, a sliding connecting seat and a trigger assembly, wherein the insulating support is fixedly mounted on one side of the metal heat-conducting plate away from the drainage plate, and the shunt unit and the alarm unit are supported by the insulating support;
the metal heat-conducting plate with the drainage board pastes, bimetallic strip middle part with metal heat-conducting plate fixed connection, bimetallic strip both ends pass through respectively sliding connection seat with trigger the subassembly and connect, through the bimetallic strip is heated and takes place the deformation drive trigger the subassembly and take place the displacement, trigger the subassembly and remove to the assigned position and can make the reposition of redundant personnel unit alarm unit switches on.
Preferably, the shunt unit includes a shunt wire and a first conductive block, two ends of the shunt wire are respectively connected to the wire, the shunt wire penetrates through the insulating support, a first open-circuit opening is formed in a portion of the shunt wire located inside the insulating support, and the first conductive block is respectively and fixedly connected to two ends of the first open-circuit opening;
the alarm unit comprises an alarm system and a second conductive block, the alarm system is fixedly mounted on the insulating support, a second open circuit opening is formed in one side, close to the first conductive block, of the alarm system, and the second conductive block is fixedly connected to two ends of the first open circuit opening respectively;
and one sides of the first conductive block and the second conductive block, which are close to the ejector plate, are provided with cambered surface insulation guide openings.
Preferably, the trigger assembly comprises an ejection plate, an insulating connecting rod, a shunt contact and an alarm contact, the insulating connecting rod is fixedly connected to the middle part of the surface of the ejection plate, and the shunt contact and the alarm contact are sequentially arranged on the insulating connecting rod;
when the shunt contact starts to be clamped between the two first conductive blocks to enable the shunt unit to be conducted, the alarm contact is located in an area between the first conductive blocks and the second conductive blocks, and when the alarm contact starts to be clamped between the two second conductive blocks to enable the alarm unit to be conducted, the shunt contact keeps in contact with the first conductive blocks.
Preferably, a heat conduction base is arranged in the middle of the surface of the metal heat conduction plate, a heat conduction sleeve is arranged on the heat conduction base, the bimetallic strip is sleeved on the heat conduction sleeve and fixed through screws, the end part of the ejection plate is respectively in sliding butt joint with the inner wall of the insulating support, the two ends of the ejection plate are respectively in sliding fit with the sliding connection seats, and the two ends of the bimetallic strip are respectively in running fit with the sliding connection seats.
Preferably, the two ends of the bimetal piece are respectively provided with a fixed connecting seat, the sliding connecting seat comprises a T-shaped clamping block and a shaft seat, the two ends of the surface of the ejecting plate are respectively provided with a clamping hole, the T-shaped clamping block is respectively assembled on the clamping holes in a sliding manner, and the shaft seat is respectively matched with a fixed shaft on the fixed connecting seat in a rotating manner.
Preferably, the connecting plate with the metal heat-conducting plate sets up respectively the drainage plate both sides, fastening bolt passes through the screw assembly the connecting plate the drainage plate on the metal heat-conducting plate, the extrusion mechanism is installed the drainage plate is provided with one side of connecting plate and right the connecting plate carries out direct extrusion.
Preferably, the extrusion mechanism comprises a fixed shell, an extrusion elastic part and a pressing plate, the fixed shell is fixedly installed on one side of the drainage plate, two ends of the extrusion elastic part are respectively connected to the inner wall of the fixed shell and the surface of the pressing plate, the pressing plate is attached to the surface of the connecting plate, and the extrusion elastic part is in a completely-compressed force storage state when the fastening bolt is in a fastening state.
Preferably, the strain clamp body further comprises a clamp main pipe, a drainage pipe and a shunt wire sleeve, a steel anchor is arranged on the clamp main pipe, the drainage plate and the connecting plate are respectively arranged at the end parts of the clamp main pipe and the drainage pipe, and the wire is respectively connected to the end parts of the clamp main pipe and the drainage pipe;
the wire clamp main pipe and the drainage pipe are respectively and fixedly connected with the shunt wire sleeve, the shunt wire is fixedly sleeved in the shunt wire sleeve, and the first conductive block is located at the end part of the shunt wire sleeve.
(III) advantageous effects
Compared with the prior art, the invention provides a strain clamp for electric power engineering, which has the following beneficial effects:
1. this strain clamp for electric power engineering extrudees fastening bolt's drainage plate, connecting plate, thalposis trigger mechanism through extrusion mechanism, because the installation is not in place or when being invaded by natural environment and cause fastening bolt not hard up, spare part loss, extrusion mechanism can make drainage plate, connecting plate, thalposis trigger mechanism through the extrusion and keep in close contact with each other all the time to reduce the contact resistance between drainage plate and the connecting plate, can also guarantee thalposis trigger mechanism to the precision of drainage plate temperature-sensing.
2. This strain clamp for electric power engineering, can make the reposition of redundant personnel unit keep the on-state always after triggering the reposition of redundant personnel unit through temperature-sensing trigger mechanism, the electric current volume that makes flowing through on the drainage plate reduces, alleviate the condition of generating heat of drainage plate, trigger the alarm unit at temperature-sensing trigger mechanism and send the police dispatch newspaper back to ground maintainer, the reposition of redundant personnel unit can accomplish the circuit maintenance for the staff and provide the time buffering to the alleviating of the condition of generating heat of drainage plate, make the staff can in time ascend a height and maintain the circuit, avoid appearing reposition of redundant personnel unit snap-off and cause the condition of the electric current sharply-increased through the drainage plate and accelerating the burnout of drainage plate, prevent to cause huge loss.
3. This strain clamp for electric power engineering, temperature variation through bimetallic strip response drainage plate, bimetallic strip takes place bending deformation because the sheetmetal coefficient of thermal expansion of two different materials is different when being heated, make its both ends perk, the drive triggers the subassembly and produces the displacement, through making shunting contact and the alarm contact on the insulating connecting rod card respectively go into realizing switching on of reposition of redundant personnel unit and alarm unit between the conducting block that corresponds, the contact effect of switch on junction is good, and when the alarm contact switched on alarm unit, the reposition of redundant personnel contact can keep and the conducting block contact that corresponds, avoid shunting unit snap-off to cause the electric current through the drainage plate to sharply increase.
4. This strain clamp for electric power engineering links together drainage plate, connecting plate, metal heat-conducting plate through fastening bolt, and if fastening bolt takes place to become flexible or spare part takes place the loss, extrusion elastic component from holding power state automatic release, drives the clamp plate and carries out direct extrusion to the connecting plate, makes drainage plate, connecting plate, metal heat-conducting plate three keep in close contact with.
Drawings
FIG. 1 is an exploded schematic view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is an exploded view of the temperature sensitive trigger mechanism of the present invention;
FIG. 4 is a schematic view of a part of the components of the temperature sensitive trigger mechanism of the present invention;
FIG. 5 is a schematic view of a portion of the assembly of the present invention in a flat condition;
FIG. 6 is a schematic diagram of a part of the components of the shunt unit of the present invention when the shunt unit starts to conduct;
FIG. 7 is a schematic diagram of a portion of the components of the alarm unit of the present invention starting to conduct;
FIG. 8 is a schematic view of a partial cross-sectional view of a part of the components of the temperature sensitive trigger mechanism of the present invention;
FIG. 9 is a schematic view of a partial cross-sectional configuration of the extrusion mechanism and a portion of the assembly of the present invention;
fig. 10 is a schematic structural view of the strain clamp body of the present invention.
In the figure: 1. a strain clamp body; 11. a drainage plate; 12. a connecting plate; 13. fastening a bolt; 14. a wire clamp main pipe; 15. a drainage tube; 16. a shunt wire sleeve; 2. a wire; 3. a temperature-sensitive trigger mechanism; 31. a metal heat conducting plate; 311. a thermally conductive base; 312. a heat conducting sleeve; 32. an insulating support; 33. a bimetal; 331. a fixed connecting seat; 34. a sliding connection seat; 35. a trigger component; 351. ejecting the plate; 352. an insulating link; 353. a shunt contact; 354. an alarm contact; 4. an extrusion mechanism; 41. a stationary housing; 42. extruding the elastic member; 43. pressing a plate; 5. a shunting unit; 51. a first conductive block; 6. an alarm unit; 61. an alarm system; 62. and a second conductive block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-2, a strain clamp for electric power engineering includes a strain clamp body 1, a temperature-sensitive triggering mechanism 3, an extrusion mechanism 4, a shunt unit 5, and an alarm unit 6, where the strain clamp body 1 is used to connect a lead 2, the strain clamp body 1 includes a drainage plate 11, a connecting plate 12, and a fastening bolt 13, and the drainage plate 11, the connecting plate 12, and the temperature-sensitive triggering mechanism 3 are connected by the fastening bolt 13 and kept in close contact under the action of the extrusion mechanism 4, so as to reduce contact resistance and ensure the temperature-sensitive effect of the temperature-sensitive triggering mechanism 3 on the drainage plate 11;
when the temperature sensed by the temperature sensing triggering mechanism 3 reaches a first limit value, the shunting unit 5 is triggered to shunt the wires 2 so as to reduce the heat productivity of the drainage plate 11, if the temperature of the drainage plate 11 rises back and continues to rise, the shunting unit 5 can be kept conducted, and when the temperature sensed by the temperature sensing triggering mechanism 3 reaches a second limit value, the alarm unit 6 is triggered to give an alarm.
When the tension clamp is used, a lead 2 is connected to a tension clamp body 1, and a drainage plate 11, a connecting plate 12 and a temperature-sensitive trigger mechanism 3 which are connected with a fastening bolt 13 are extruded by an extrusion mechanism 4 to keep the three in close contact; in the running process of the circuit, the temperature-sensing trigger mechanism 3 senses the surface temperature of the drainage plate 11 in real time, and when the temperature sensed by the temperature-sensing trigger mechanism 3 reaches a first limit value along with the temperature rise of the drainage plate 11, the temperature-sensing trigger mechanism 3 can trigger the shunt unit 5 to be communicated with the lead 2, so that shunt is realized, and the heat productivity of the drainage plate 11 is reduced; along with the increase of line load and the intrusion of natural environment, the condition that the temperature of the drainage plate 11 rises back and continues to rise still can appear after a period of time, and the shunting unit 5 still can keep conducting, and when the temperature sensed by the temperature sensing triggering mechanism 3 reaches a second limit value, the temperature sensing triggering mechanism 3 can trigger the alarm unit 6 to give an alarm to ground power engineering maintenance personnel.
By arranging the extrusion mechanism 4, when the fastening bolt 13 is loosened and parts are damaged due to improper installation or intrusion of natural environment, the extrusion mechanism 4 can enable the drainage plate 11, the connecting plate 12 and the temperature-sensing trigger mechanism 3 to be always in close contact with each other through extrusion, so that the contact resistance between the drainage plate 11 and the connecting plate 12 is reduced, and the accuracy of the temperature sensing trigger mechanism 3 in sensing the temperature of the drainage plate 11 can be ensured; after the temperature-sensing trigger mechanism 3 triggers the shunting unit 5 to shunt the wires 2, the amount of current flowing through the drainage plate 11 can be reduced, and then the heating condition of the drainage plate 11 is relieved, after the temperature-sensing trigger mechanism 3 triggers the alarm unit 6 to send an alarm to a ground maintainer, the shunting unit 5 and the alarm unit 6 can be simultaneously kept on, the shunting unit 5 can provide time buffering for the staff to finish line maintenance for relieving the heating condition of the drainage plate 11, so that the staff can timely ascend to maintain the line, the situation that the current of the drainage plate 11 is suddenly increased to accelerate the burning of the drainage plate 11 due to sudden disconnection of the shunting unit 5 is avoided, and huge loss is prevented from being caused.
Referring to fig. 1, 3 and 4, further, the temperature-sensitive trigger mechanism 3 includes a metal heat-conducting plate 31, an insulating support 32, a bimetal 33, a sliding connection seat 34 and a trigger assembly 35, the insulating support 32 is fixedly installed on one side of the metal heat-conducting plate 31 away from the flow-guiding plate 11, detachable housings are respectively installed on two sides of the insulating support 32, and the flow-dividing unit 5 and the alarm unit 6 are supported by the insulating support 32;
the metal heat conducting plate 31 and the drainage plate 11 are attached to each other, the middle part of the bimetallic strip 33 is fixedly connected with the metal heat conducting plate 31, two ends of the bimetallic strip 33 are respectively connected with the trigger component 35 through the sliding connection seat 34, part of the temperature on the surface of the drainage plate 11 can be conducted to the bimetallic strip 33 through the metal heat conducting plate 31, the bimetallic strip 33 can sense the temperature change of the drainage plate 11, the bimetallic strip 33 can be bent and deformed due to different thermal expansion coefficients of the two bimetallic strips made of different materials when being heated, two ends of the bimetallic strip 33 are tilted, two ends of the bimetallic strip 33 can be jacked up by the trigger component 35 through the sliding connection seat 34, the trigger component 35 can be displaced, when the temperature sensed by the bimetallic strip 33 reaches a first limit value, the trigger component 35 is displaced to the position where the shunt unit 5 starts to be triggered, and along with the temperature rise, the displacement of the trigger component 35 can be kept conducted all the time, when the temperature sensed by the bimetallic strip 33 reaches a second limit value, the trigger component 35 is displaced to the position where the alarm unit 6 starts to be triggered.
Referring to fig. 5-8, further, the shunt unit 5 includes a shunt wire and first conductive blocks 51, two ends of the shunt wire are respectively connected to the wires 2, the shunt wire passes through the insulating support 32, and a portion of the shunt wire located inside the insulating support 32 is provided with a first open-circuit opening, and the first conductive blocks 51 are respectively and fixedly connected to two ends of the first open-circuit opening, so that when the two first conductive blocks 51 are connected together by the trigger assembly 35, the shunt wire can be connected and conduction stability can be ensured, a part of current flowing through the wires 2 flows out from a connection position of the drainage plate 11 and the connection plate 12, and the other part of current flows out from the shunt wire, so as to achieve shunt, reduce the amount of current flowing on the drainage plate 11, alleviate the heating condition of the drainage plate 11, and reduce the risk of burning the drainage plate 11;
the alarm unit 6 comprises an alarm system 61 and second conductive blocks 62, the alarm system 61 is fixedly mounted on the insulating support 32, one side of the alarm system 61 close to the first conductive block 51 is provided with a second open circuit opening, and the second conductive blocks 62 are respectively and fixedly connected to two ends of the first open circuit opening, so that when the two second conductive blocks 62 are connected together through the trigger assembly 35, the alarm system 61 can be conducted, the conduction stability can be ensured, an alarm can be given to ground maintenance personnel, and the personnel can be informed to ascend in time to maintain the circuit;
one sides of the first conductive block 51 and the second conductive block 62 close to the ejecting plate 351 are provided with cambered insulation guide openings.
The trigger assembly 35 comprises an ejection plate 351, an insulating connecting rod 352, a shunt contact 353 and an alarm contact 354, wherein the insulating connecting rod 352 is fixedly connected to the middle part of the surface of the ejection plate 351, and the shunt contact 353 and the alarm contact 354 are sequentially arranged on the insulating connecting rod 352;
when the temperature sensed by the bimetallic strip 33 reaches a first limit value, the trigger assembly 35 generates displacement, the shunt contact 353 starts to be clamped between the two first conductive blocks 51 to conduct the shunt unit 5, at the moment, the alarm contact 354 is positioned in an area between the first conductive blocks 51 and the second conductive blocks 62, the displacement generated by the trigger assembly 35 increases along with the increase of the temperature, the shunt contact 353 keeps close contact with the two first conductive blocks 51 to keep the shunt unit 5 conducted, and when the temperature sensed by the bimetallic strip 33 reaches a second limit value, the alarm contact 354 starts to be clamped between the two second conductive blocks 62 to conduct the alarm unit 6, so that the shunt unit 5 and the alarm unit 6 are conducted simultaneously, a worker ascends to maintain the circuit after receiving an alarm for a required time, the shunt unit 5 can relieve the heating condition of the drainage plate 11 to a certain extent, and the phenomenon that the current passing through the drainage plate 11 is increased suddenly due to sudden disconnection of the shunt unit 5 is avoided, and the burnout of the drainage plate 11 is prevented from being accelerated;
the shunting contact 353 and the alarm contact 354 are respectively clamped into the cambered insulation guide openings formed in the first conductive block 51 and the second conductive block 62, the cambered insulation guide openings are in a shape that the surface is smooth and gradually narrowed, the shunting contact 353 and the alarm contact 354 can be assisted to be accurately clamped into the corresponding conductive blocks, and the situation that the shunting unit 5 and the alarm unit 6 cannot be normally conducted due to the position deviation of the shunting contact 353 and the alarm contact 354 is avoided.
Referring to fig. 4, further, a heat conducting base 311 is disposed in the middle of the surface of the metal heat conducting plate 31, a heat conducting sleeve 312 is disposed on the heat conducting base 311, a bimetal 33 is sleeved on the heat conducting sleeve 312 and fixed by screws, the end portions of the ejector plate 351 are respectively abutted to the inner wall of the insulating support 32 in a sliding manner, sliding connection seats 34 are respectively assembled at the two ends of the ejector plate 351 in a sliding manner, the two ends of the bimetal 33 are respectively in running fit with the sliding connection seats 34, so that when the bimetal 33 is deformed by heating, the two ends of the bimetal 33 tilt up to drive the two sliding connection seats 34 to slide toward the directions close to each other, and the ejector plate 351 is ejected at the same time, so that the whole trigger assembly 35 generates displacement.
Referring to fig. 8, further, two ends of the bimetal sheet 33 are respectively provided with a fixed connection seat 331, the sliding connection seat 34 includes a T-shaped fixture block and a shaft seat, two ends of the surface of the ejecting plate 351 are respectively provided with a clamping hole, the T-shaped fixture block is respectively slidably assembled on the clamping holes, and the shaft seat is respectively rotatably matched with a fixed shaft on the fixed connection seat 331, so that when the bimetal sheet 33 is heated and deformed, the fixed connection seats 331 at two ends of the bimetal sheet are kept connected with the sliding connection seat 34 and drive the ejecting plate 351 to move.
When the metal heat conduction plate is used, the metal heat conduction plate 31 conducts part of the temperature of the surface of the drainage plate 11 to the bimetallic strip 33 in real time through the heat conduction base 311 and the heat conduction sleeve 312, so that the bimetallic strip 33 can sense the temperature change of the drainage plate 11 in real time, two ends of the bimetallic strip 33 tilt up when being heated, the fixed connection seats 331 at two ends drive the two sliding connection seats 34 to slide towards the direction close to each other and jack the jack-out plate 351, the jack-out plate 351 drives the insulation connecting rod 352 to generate displacement, and the positions of the shunt contact 353 and the alarm contact 354 on the insulation connecting rod 352 are changed; when the temperature sensed by the bimetal 33 reaches a first limit value, the shunt contact 353 starts to be clamped between the two first conductive blocks 51 from the corresponding cambered insulation guide port, the shunt conductor is connected, so that a part of current flowing through the conductor 2 flows out from the joint of the drainage plate 11 and the connecting plate 12, and the other part of current flows out from the shunt conductor, so that shunt is realized, along with the increase of the surface temperature of the drainage plate 11, the temperature sensed by the bimetal 33 also increases, the alarm contact 354 gradually approaches to the second conductive block 62, the shunt contact 353 keeps close contact with the two first conductive blocks 51, so that the shunt unit 5 keeps on, and when the temperature sensed by the bimetal 33 reaches a second limit value, the alarm contact 354 starts to be clamped between the two second conductive blocks 62 from the corresponding cambered insulation guide port, so that the alarm system 61 is on, and an alarm is given to a ground maintainer.
Referring to fig. 9, further, a connecting plate 12 and a metal heat-conducting plate 31 are respectively disposed at both sides of the flow-guiding plate 11, a fastening bolt 13 is assembled on the connecting plate 12, the flow-guiding plate 11, and the metal heat-conducting plate 31 by means of a screw, and a pressing mechanism 4 is installed at one side of the flow-guiding plate 11 where the connecting plate 12 is disposed and directly presses the connecting plate 12, so that when the fastening bolt 13 is loosened or parts are damaged, the connecting plate 12 is directly pressed by the pressing mechanism 4, and the flow-guiding plate 11, the connecting plate 12, and the metal heat-conducting plate 31 can be always kept in close contact with each other.
Referring to fig. 9, further, the extruding mechanism 4 includes a fixing shell 41, an extruding elastic member 42 and a pressing plate 43, the fixing shell 41 is fixedly installed on one side of the drainage plate 11, two ends of the extruding elastic member 42 are respectively connected to the inner wall of the fixing shell 41 and the surface of the pressing plate 43, the pressing plate 43 is attached to the surface of the connecting plate 12, and the extruding elastic member 42 is in a complete compression force storage state when the fastening bolt 13 is in a fastening state, so that when the fastening bolt 13 is loosened or parts are damaged, a gap exists between the drainage plate 11, the connecting plate 12 and the metal heat conducting plate 31, and the extruding elastic member 42 can be automatically released, so that the pressing plate 43 extrudes the connecting plate 12, the contact tightness between the drainage plate 11, the connecting plate 12 and the metal heat conducting plate 31 is improved, thereby reducing the contact resistance between the drainage plate 11 and the connecting plate 12, reducing the heat generation of the drainage plate 11, ensuring the accuracy of the metal heat conducting plate 31 in sensing the temperature of the drainage plate 11, and reducing the sensing error. Specifically, the pressing elastic member 42 may be a spring having an insulating layer provided on a surface thereof.
When the drainage plate is used, the drainage plate 11, the connecting plate 12 and the metal heat conducting plate 31 are connected together through the fastening bolts 13, if the fastening bolts 13 loosen or parts are worn, the extrusion elastic part 42 is automatically released from a force storage state, and the pressing plate 43 is driven to directly extrude the connecting plate 12, so that the drainage plate 11, the connecting plate 12 and the metal heat conducting plate 31 are kept in close contact.
Referring to fig. 10, further, the strain clamp body 1 further includes a clamp main tube 14, a drainage tube 15, and a shunt wire sleeve 16, a steel anchor is disposed on the clamp main tube 14, the drainage plate 11 and the connecting plate 12 are respectively disposed at the ends of the clamp main tube 14 and the drainage tube 15, and the wire 2 is respectively connected to the ends of the clamp main tube 14 and the drainage tube 15;
the main wire clamp tube 14 and the drainage tube 15 are respectively and fixedly connected with a shunt wire sleeve 16, the shunt wire sleeve 16 extends to the inner side of the insulating support 32 and is fixedly assembled on the side wall of the insulating support 32, a shunt wire is fixedly sleeved in the shunt wire sleeve 16, and the first conductive block 51 is positioned at the end part of the shunt wire sleeve 16.
When the invention is used, current flows to the output end of the lead 2 from the current input end of the lead 2 sequentially through the main wire clamp 14, the drainage plate 11, the connecting plate 12 and the drainage tube 15, when the surface temperature of the drainage plate 11 is overhigh, the shunt unit 5 is conducted, a part of the current input into the main wire clamp 14 from the input end of the lead 2 is transmitted through an original path, and a part of the current is transmitted to the output end of the lead 2 sequentially through the shunt wire sleeve 16 and the drainage tube 15, so that shunt is realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a strain clamp for electric power engineering, includes strain clamp body (1), thalposis trigger mechanism (3), extrusion mechanism (4), reposition of redundant personnel unit (5), alarm unit (6), its characterized in that: the strain clamp body (1) is used for connecting a lead (2), the strain clamp body (1) comprises a drainage plate (11), a connecting plate (12) and a fastening bolt (13), and the drainage plate (11), the connecting plate (12) and the temperature-sensing trigger mechanism (3) are connected through the fastening bolt (13) and are kept in close contact under the action of the extrusion mechanism (4) so as to reduce contact resistance and ensure the temperature sensing effect of the temperature-sensing trigger mechanism (3) on the drainage plate (11);
when the temperature sensed by the temperature sensing triggering mechanism (3) reaches a first limit value, the shunting unit (5) is triggered to shunt the wires (2) so as to reduce the heat productivity of the drainage plate (11), if the temperature of the drainage plate (11) rises back and continues to rise, the shunting unit (5) can be kept conducted, and when the temperature sensed by the temperature sensing triggering mechanism (3) reaches a second limit value, the alarm unit (6) is triggered to give an alarm.
2. The strain clamp for electric power engineering of claim 1, wherein: the temperature-sensing trigger mechanism (3) comprises a metal heat-conducting plate (31), an insulating support (32), a bimetallic strip (33), a sliding connection seat (34) and a trigger component (35), wherein the insulating support (32) is fixedly mounted on one side, far away from the drainage plate (11), of the metal heat-conducting plate (31), and the shunt unit (5) and the alarm unit (6) are supported through the insulating support (32);
metal heat-conducting plate (31) with drainage plate (11) pastes mutually, bimetallic strip (33) middle part with metal heat-conducting plate (31) fixed connection, bimetallic strip (33) both ends are passed through respectively sliding connection seat (34) with trigger subassembly (35) are connected, through bimetallic strip (33) are heated and take place the deformation drive trigger subassembly (35) and take place the displacement, trigger subassembly (35) and remove to the assigned position and can make shunt unit (5) alarm unit (6) switch on.
3. The strain clamp for electric power engineering of claim 2, wherein: the shunt unit (5) comprises a shunt wire and a first conductive block (51), two ends of the shunt wire are respectively connected with the wire (2), the shunt wire penetrates through the insulating support (32), a first open circuit opening is formed in the part, located on the inner side of the insulating support (32), of the shunt wire, and the first conductive block (51) is fixedly connected to two ends of the first open circuit opening respectively;
the alarm unit (6) comprises an alarm system (61) and a second conductive block (62), the alarm system (61) is fixedly mounted on the insulating bracket (32), a second open-circuit opening is formed in one side, close to the first conductive block (51), of the alarm system (61), and the second conductive blocks (62) are fixedly connected to two ends of the first open-circuit opening respectively;
one sides of the first conductive block (51) and the second conductive block (62) close to the ejector plate (351) are provided with cambered surface insulation guide openings.
4. The strain clamp for electric power engineering of claim 3, wherein: the trigger assembly (35) comprises an ejector plate (351), an insulating connecting rod (352), a shunt contact (353) and an alarm contact (354), the insulating connecting rod (352) is fixedly connected to the middle of the surface of the ejector plate (351), and the shunt contact (353) and the alarm contact (354) are sequentially arranged on the insulating connecting rod (352);
when the shunt contact (353) starts to be clamped between the two first conductive blocks (51) to enable the shunt unit (5) to be conducted, the alarm contact (354) is located in an area between the first conductive blocks (51) and the second conductive blocks (62), and when the alarm contact (354) starts to be clamped between the two second conductive blocks (62) to enable the alarm unit (6) to be conducted, the shunt contact (353) keeps in contact with the first conductive blocks (51).
5. The strain clamp for electric power engineering of claim 4, wherein: metal heat-conducting plate (31) surface middle part is provided with heat conduction base (311), be provided with heat conduction cover (312) on heat conduction base (311), bimetallic strip (33) cover is established heat conduction cover (312) is gone up and is passed through the fix with screw, liftout plate (351) tip slides the butt respectively on insulating support (32) inner wall, liftout plate (351) both ends slide respectively and are equipped with sliding connection seat (34), bimetallic strip (33) both ends respectively with sliding connection seat (34) normal running fit.
6. The strain clamp for electric power engineering of claim 5, wherein: the double-metal-sheet ejecting device is characterized in that fixed connecting seats (331) are respectively arranged at two ends of the double metal sheet (33), each sliding connecting seat (34) comprises a T-shaped clamping block and a shaft seat, clamping holes are respectively formed in two ends of the surface of the ejecting plate (351), the T-shaped clamping blocks are respectively assembled on the clamping holes in a sliding mode, and the shaft seats are respectively matched with fixed shafts on the fixed connecting seats (331) in a rotating mode.
7. The strain clamp for electric power engineering of claim 2, wherein: connecting plate (12) with metal heat-conducting plate (31) sets up respectively drainage plate (11) both sides, fastening bolt (13) are in through the screw assembly connecting plate (12) drainage plate (11) on metal heat-conducting plate (31), install extrusion mechanism (4) drainage plate (11) are provided with one side of connecting plate (12) and right connecting plate (12) carry out direct extrusion.
8. The strain clamp for electric power engineering of claim 7, wherein: extrusion mechanism (4) are including set casing (41), extrusion elastic component (42) and clamp plate (43), set casing (41) fixed mounting be in drainage plate (11) one side, extrusion elastic component (42) both ends are connected respectively set casing (41) inner wall with clamp plate (43) surface, clamp plate (43) with connecting plate (12) surface is pasted mutually, when fastening bolt (13) are in fastening state extrusion elastic component (42) are in the complete compression and hold up the power state.
9. The strain clamp for electric power engineering of claim 3, wherein: the strain clamp body (1) further comprises a clamp main pipe (14), a drainage tube (15) and a shunt wire sleeve (16), a steel anchor is arranged on the clamp main pipe (14), the drainage plate (11) and the connecting plate (12) are respectively arranged at the end parts of the clamp main pipe (14) and the drainage tube (15), and the wire (2) is respectively connected to the end parts of the clamp main pipe (14) and the drainage tube (15);
the wire clamp is mainly responsible for (14) with respectively fixedly connected with on drainage tube (15) reposition of redundant personnel line cover (16), the fixed cover of reposition of redundant personnel wire is established in reposition of redundant personnel line cover (16), first conducting block (51) all are located reposition of redundant personnel line cover (16) tip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660013.6A CN115173350B (en) | 2022-06-11 | 2022-06-11 | Strain clamp for power engineering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660013.6A CN115173350B (en) | 2022-06-11 | 2022-06-11 | Strain clamp for power engineering |
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| CN115173350A true CN115173350A (en) | 2022-10-11 |
| CN115173350B CN115173350B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210660013.6A Active CN115173350B (en) | 2022-06-11 | 2022-06-11 | Strain clamp for power engineering |
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| CN (1) | CN115173350B (en) |
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2022
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|---|---|
| CN115173350B (en) | 2023-08-15 |
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