CN115173350B - Strain clamp for power engineering - Google Patents
Strain clamp for power engineering Download PDFInfo
- Publication number
- CN115173350B CN115173350B CN202210660013.6A CN202210660013A CN115173350B CN 115173350 B CN115173350 B CN 115173350B CN 202210660013 A CN202210660013 A CN 202210660013A CN 115173350 B CN115173350 B CN 115173350B
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- Prior art keywords
- plate
- shunt
- drainage
- strain clamp
- 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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- Physics & Mathematics (AREA)
- 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, which comprises a strain clamp body, a temperature sensing trigger mechanism, an extrusion mechanism, a shunt unit and an alarm unit, wherein the strain clamp body is used for connecting a wire, and the strain clamp body comprises a drainage plate, a connecting plate and a fastening bolt. 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 bolts 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 on the temperature sensing of the drainage plate is ensured; the current-collecting device has the advantages that the current-collecting device can keep a conduction state after the current-collecting unit is triggered by the temperature-sensing trigger mechanism, the heating condition of the current-collecting plate is relieved, and after the alarm unit is triggered by the temperature-sensing trigger mechanism to give out an alarm, the current-collecting unit can relieve heating of the current-collecting plate to provide time buffering for workers to complete line maintenance, and the current through the current-collecting plate is rapidly increased to accelerate burning caused by sudden circuit breaking of the current-collecting unit is avoided.
Description
Technical Field
The invention relates to the technical field of strain clamps, in particular to a strain clamp for power engineering.
Background
The strain clamp is used for fixing a wire to bear the tension of the wire, and is used for hanging the wire to a strain insulator string or a strain insulator string of a non-linear tower, and is also used for fixing a pull wire of a pull wire tower.
The strain clamp drainage plate generates heat and is an important factor affecting the safe and stable operation of the transmission line, the drainage plate generates heat due to the thermal effect of current, and the drainage plate has certain resistance, so that a part of electric energy loss is necessary when the current passes through the drainage plate, and the temperature of the drainage plate is increased. Under normal conditions, the contact resistance of the drainage plate is very small, the heating of the drainage plate is not higher than that of adjacent current-carrying wires, but the line is not in place and is disturbed by natural environment in the operation process, so that loosening of bolts, dirt accumulation on the surface of the drainage plate, loosening of line contact points and the like are easy to occur, the contact resistance of the drainage plate is increased, the drainage plate is further heated, metal oxidation is accelerated after the drainage plate heats, the contact resistance is larger, vicious circulation is formed, and burning loss of the heating part of the drainage plate can be caused in severe cases.
Chinese patent with application number of CN204290224U provides a dovetail groove cone wedge type strain clamp which is not easy to loosen. The device that this patent proposed can only increase drainage plate and drainage tube area of contact and make both close-fitting through the cooperation of dovetail with the conical surface when the installation, owing to receive invasion such as wind, rain, high temperature, severe cold, still can appear the clearance owing to receive weak natural erosion and expend with heat and contract with cold between dovetail and the conical surface, can't make drainage plate and drainage tube remain in close contact throughout for contact effect reduces, causes contact resistance to increase, still can cause drainage plate to generate heat when serious.
Chinese patent application number CN201610546509.5 discloses strain clamp drainage plate with automatic temperature control and heating shunt and alarm device. In the device provided by the patent, the bimetal temperature measuring sheet can only keep contact with one contact to realize circuit conduction, when the temperature is high enough, the bimetal temperature measuring sheet contacts with the contact of the alarm to give an alarm, and as the bimetal temperature measuring sheet leaves the shunt wire to conduct the contact, the shunt can be stopped immediately, so that the current passing through the drainage plate is increased sharply, the burning loss of the drainage plate is accelerated, and huge loss is caused; in addition, the contact of the bimetal temperature measuring sheet and the contact is unstable due to the invasion of natural environment, so that even if the actual temperature reaches the shunt or alarm limit, the circuit cannot be conducted, and the heat generated by the drainage plate cannot be timely treated.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a strain clamp for power engineering, which has the advantages that a drainage component can be always kept in close contact, a bimetal strip can be conducted with an alarm unit and a shunt unit can be kept conducting, and the like, and solves the problems that the prior art can not keep the drainage plate and a drainage tube in close contact all the time, and the current flowing through the drainage plate can not be increased sharply because the shunt conduction can not be kept at the same time when a bimetal temperature measuring strip is conducted with an alarm.
(II) technical scheme
In order to solve the technical problem that the current flowing through the drainage plate is sharply increased because the drainage plate and the drainage tube cannot be kept in close contact all the time and the diversion conduction cannot be simultaneously kept when the bimetal temperature measuring piece conducts the alarm in the prior art, the invention provides the following technical scheme:
the strain clamp comprises a strain clamp body, a temperature sensing trigger mechanism, an extrusion mechanism, a shunt unit and an alarm unit, wherein the strain clamp body is used for connecting wires, the strain clamp body comprises a drainage plate, a connecting plate and a fastening bolt, the drainage plate, the connecting plate and the temperature sensing trigger mechanism are connected through the fastening bolt and are kept in close contact under the action of the extrusion mechanism, so that contact resistance is reduced, and the temperature sensing effect of the temperature sensing trigger mechanism on the drainage plate is guaranteed;
when the temperature sensed by the temperature sensing trigger mechanism reaches a first limit value, the shunt unit is triggered to shunt the lead 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 shunt unit can be kept on, and when the temperature sensed by the temperature sensing trigger 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 component, wherein the insulating support is fixedly arranged on one side of the metal heat conducting plate far away from the drainage plate, and the shunt unit and the alarm unit are supported by the insulating support;
the metal heat-conducting plate is attached to the drainage plate, the middle of the bimetallic strip is fixedly connected with the metal heat-conducting plate, two ends of the bimetallic strip are respectively connected with the trigger assembly through the sliding connecting seat, the trigger assembly is driven to displace through deformation caused by heating of the bimetallic strip, and the trigger assembly moves to a specified position to enable the shunt unit and the alarm unit to be conducted.
Preferably, the shunt unit comprises a shunt wire and a first conductive block, wherein two ends of the shunt wire are respectively connected with the wire, a first disconnection opening is formed in a part, which penetrates through the insulating support and is positioned on the inner side of the insulating support, of the shunt wire, and the first conductive block is respectively and fixedly connected with two ends of the first disconnection opening;
the alarm unit comprises an alarm system and a second conductive block, wherein the alarm system is fixedly arranged on the insulating bracket, a second circuit breaking opening is formed in one side, close to the first conductive block, of the alarm system, and the second conductive blocks are respectively and fixedly connected to two ends of the first circuit breaking opening;
and cambered surface insulation guide openings are formed in one sides of the first conductive block and the second conductive block, which are close to the ejector plate.
Preferably, the triggering assembly comprises an ejector plate, an insulating connecting rod, a shunt contact and an alarm contact, wherein the insulating connecting rod is fixedly connected to the middle part of the surface of the ejector 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 conduct the shunt unit, the alarm contact is positioned 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 conduct the alarm unit, the shunt contact keeps contact with the first conductive blocks.
Preferably, a heat conducting base is arranged in the middle of the surface of the metal heat conducting plate, a heat conducting sleeve is arranged on the heat conducting base, the bimetallic strip is sleeved on the heat conducting sleeve and fixed through screws, the end parts of the ejection plates are respectively in sliding butt joint with the inner wall of the insulating support, the two ends of the ejection plates are respectively provided with the sliding connecting seat in a sliding manner, and the two ends of the bimetallic strip are respectively in running fit with the sliding connecting seat.
Preferably, the bimetal strip both ends are provided with fixed connection seat respectively, the slip connection seat includes T shape fixture block and axle bed, the joint hole has been seted up respectively at liftout plate surface both ends, T shape fixture block respectively sliding fit is in on the joint hole, the axle bed respectively with fixed axle normal running fit on the fixed connection seat.
Preferably, the connecting plate and the metal heat-conducting plate are respectively arranged at two sides of the drainage plate, the fastening bolts are assembled on the connecting plate, the drainage plate and the metal heat-conducting plate through threads, and the extrusion mechanism is arranged at one side of the drainage plate where the connecting plate is arranged and directly extrudes the connecting plate.
Preferably, the extrusion mechanism comprises a fixed shell, an extrusion elastic piece and a pressing plate, wherein the fixed shell is fixedly arranged on one side of the drainage plate, two ends of the extrusion elastic piece are respectively connected with 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 piece is in a complete compression 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, wherein a steel anchor is arranged on the clamp main pipe, the drainage plate and the connection plate are respectively arranged at the end parts of the clamp main pipe and the drainage pipe, and the wire is respectively connected with the wire at the end parts of the clamp main pipe and the drainage pipe;
the wire clamp main pipe and the drainage tube 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 blocks are all positioned at the end parts of the shunt wire sleeve.
(III) beneficial effects
Compared with the prior art, the invention provides the strain clamp for the power engineering, which has the following beneficial effects:
1. this strain clamp for electric power engineering extrudes fastening bolt connection's drainage board, connecting plate, temperature sense trigger mechanism through extrusion mechanism, when not in place or being invaded by natural environment and cause fastening bolt to become flexible, spare part loss owing to install, extrusion mechanism can make drainage board, connecting plate, temperature sense trigger mechanism remain in close contact throughout each other through the extrusion to reduce the contact resistance between drainage board and the connecting plate, can also guarantee the accuracy of temperature sense trigger mechanism to drainage board temperature response.
2. This strain clamp for power engineering can make the reposition of redundant personnel unit keep on state always after triggering the reposition of redundant personnel unit through the temperature sense trigger mechanism, makes the electric current that flows through on the drainage board reduce, alleviates the condition of generating heat of drainage board, triggers alarm unit to ground maintainer after sending out the alarm at the temperature sense trigger mechanism, and the reposition of redundant personnel unit can provide time buffering for the staff is accomplished the line maintenance to the drainage board condition of generating heat, makes the staff in time ascend a height and maintains the line, avoids appearing the circumstances that the sudden circuit breaking of reposition of redundant personnel unit causes the current through the drainage board to increase sharply and accelerate the burnout of drainage board, prevents to cause huge loss.
3. This strain clamp for power engineering, through the temperature change of bimetallic strip response drainage board, bimetallic strip is because the sheetmetal thermal expansion coefficient of two different materials is different and take place bending deformation when being heated, make its both ends perk, drive trigger assembly produces the displacement, realize switching on of reposition of redundant personnel unit and alarm unit through making shunt contact and alarm contact on the insulating connecting rod card respectively between the conducting block that corresponds, it is good to switch on junction contact effect, and when alarm contact switches on alarm unit, shunt contact can keep contacting with the conducting block that corresponds, avoid shunt unit to break circuit suddenly and cause the current through the drainage board to increase sharply.
4. This strain clamp for electric power engineering links together drainage board, connecting plate, metal heat conduction board through fastening bolt, if fastening bolt takes place not hard up or spare part takes place the loss, extrudees the elastic component and follows the state automatic release of holding power, drives the clamp plate and carries out direct extrusion to the connecting plate, makes drainage board, connecting plate, metal heat conduction board three keep in close contact.
Drawings
FIG. 1 is an exploded 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 sensing trigger mechanism of the present invention;
FIG. 4 is a schematic view of the components of a portion of the temperature sensing trigger mechanism of the present invention;
fig. 5 is a schematic view of a part of the assembly structure of the bimetal in a flat state according to the present invention;
FIG. 6 is a schematic diagram of a part of the components of the current splitting unit of the present invention when the current splitting unit starts to conduct;
FIG. 7 is a schematic view of a part of the components of the alarm unit of the present invention when the alarm unit starts to be turned on;
FIG. 8 is a schematic view of a partial cross-sectional structure of a portion of a temperature responsive trigger mechanism assembly according to the present invention;
FIG. 9 is a schematic view of a partial cross-sectional structure of the pressing mechanism and a part of the assembly of the present invention;
fig. 10 is a schematic structural diagram of a strain clamp body according to the present invention.
In the figure: 1. a strain clamp body; 11. a drainage plate; 12. a connecting plate; 13. a fastening bolt; 14. a wire clamp main pipe; 15. a drainage tube; 16. a split sleeve; 2. a wire; 3. a temperature sensing trigger mechanism; 31. a metal heat-conducting plate; 311. a thermally conductive base; 312. a heat conducting sleeve; 32. an insulating support; 33. bimetallic strips; 331. fixing the connecting seat; 34. a sliding connecting seat; 35. a trigger assembly; 351. an ejector plate; 352. an insulating connecting rod; 353. a shunt contact; 354. an alarm contact; 4. an extrusion mechanism; 41. a fixed case; 42. extruding the elastic piece; 43. a pressing plate; 5. a shunt unit; 51. a first conductive block; 6. an alarm unit; 61. an alarm system; 62. and a second conductive block.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, a strain clamp for electric power engineering comprises a strain clamp body 1, a temperature sensing trigger mechanism 3, an extrusion mechanism 4, a shunt unit 5 and an alarm unit 6, wherein the strain clamp body 1 is used for connecting a wire 2, the strain clamp body 1 comprises a drainage plate 11, a connecting plate 12 and a fastening bolt 13, the drainage plate 11, the connecting plate 12 and the temperature sensing trigger mechanism 3 are connected through the fastening bolt 13 and kept in close contact under the action of the extrusion mechanism 4, so that the contact resistance is reduced, and the temperature sensing effect of the temperature sensing trigger mechanism 3 on the temperature of the drainage plate 11 is ensured;
when the temperature sensed by the temperature sensing trigger mechanism 3 reaches a first limit value, the shunt unit 5 is triggered to shunt the lead 2 so as to reduce the heating value of the drainage plate 11, if the temperature of the drainage plate 11 rises back and continues to rise, the shunt unit 5 can be kept on, and when the temperature sensed by the temperature sensing trigger mechanism 3 reaches a second limit value, the alarm unit 6 is triggered to give an alarm.
When the invention is used, the lead 2 is connected to the strain clamp body 1, and the drainage plate 11, the connecting plate 12 and the temperature sensing trigger mechanism 3 which are connected by the fastening bolt 13 are extruded by the extrusion mechanism 4, so that the three parts are kept in close contact; in the process of line operation, 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 the shunt is realized, and the heating value of the drainage plate 11 is reduced; along with the increase of line load and natural environment invasion, the condition that the temperature of the drainage plate 11 rises back and continues to rise still can appear after a period of time, the shunting unit 5 still can keep on, and when the temperature that the temperature sensing trigger mechanism 3 sensed reaches the second limit value, the temperature sensing trigger mechanism 3 can trigger alarm unit 6, sends the alarm to ground power engineering maintainer.
By arranging the extrusion mechanism 4, when the fastening bolt 13 is loosened and parts are damaged due to insufficient installation or natural environment invasion, the extrusion mechanism 4 can keep the drainage plate 11, the connecting plate 12 and the temperature sensing trigger mechanism 3 in close contact all the time through extrusion so as to reduce the contact resistance between the drainage plate 11 and the connecting plate 12 and ensure the accuracy of temperature sensing of the temperature sensing trigger mechanism 3 on the drainage plate 11; after the temperature sensing trigger mechanism 3 triggers the shunt unit 5 to shunt the wire 2, the current amount flowing on 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 shunt unit 5 and the alarm unit 6 can be kept on simultaneously, the release of the heating condition of the drainage plate 11 by the shunt unit 5 can provide time buffering for the staff to finish line maintenance, the staff can ascend a height in time to maintain the line, the situation that the current through the drainage plate 11 is rapidly increased and the burnout of the drainage plate 11 is accelerated due to the fact that the current of the drainage plate 11 is suddenly broken is avoided, and huge loss is prevented.
Referring to fig. 1, 3 and 4, further, the temperature sensing 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, wherein the insulating support 32 is fixedly installed on one side of the metal heat conducting plate 31 far away from the drainage plate 11, two sides of the insulating support 32 are respectively provided with a detachable shell, and the current diversion unit 5 and the alarm unit 6 are supported by the insulating support 32;
the metal heat-conducting plate 31 is attached to the drainage plate 11, the middle 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 triggering component 35 through the sliding connecting seat 34, a 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, bending deformation can occur due to different thermal expansion coefficients of two metal strips made of different materials when the bimetallic strip 33 is heated, two ends of the bimetallic strip 33 are lifted, the triggering component 35 is lifted up through the sliding connecting seat 34, the triggering component 35 is displaced, when the temperature sensed by the bimetallic strip 33 reaches a first limiting value, the triggering component 35 is moved to a position for starting triggering the shunt unit 5, and when the temperature sensed by the bimetallic strip 33 reaches a second limiting value, the triggering component 35 is displaced to be larger, the shunt unit 5 can be kept on all the time, and when the temperature sensed by the bimetallic strip 33 reaches a second limiting value, the triggering component 35 is moved to a position for starting triggering the alarm unit 6.
Referring to fig. 5-8, further, the shunt unit 5 includes 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 passes through the insulating support 32, and a first breaking opening is formed in a portion of the shunt wire located inside the insulating support 32, and the first conductive block 51 is respectively and fixedly connected to two ends of the first breaking opening, so that when the two first conductive blocks 51 are connected together through the trigger assembly 35, the shunt wire can be connected and the conduction stability is ensured, a part of current flowing through the wire 2 flows out from a connection position of the drainage plate 11 and the connection plate 12, and another part of current flows out from the shunt wire, so that the shunt is realized, the current amount flowing on the drainage plate 11 is reduced, the heating condition of the drainage plate 11 is relieved, and the risk of burning the drainage plate 11 is reduced;
the alarm unit 6 comprises an alarm system 61 and a second conductive block 62, wherein the alarm system 61 is fixedly arranged 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, 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 is ensured, an alarm is given to a ground maintenance personnel, and the personnel is informed of timely ascending the height to maintain the circuit;
the side of the first conductive block 51 and the side of the second conductive block 62, which are close to the ejector plate 351, are provided with cambered surface insulation guide openings.
The triggering component 35 comprises an ejector 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 ejector 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 limiting value, the trigger assembly 35 generates displacement, the shunt contact 353 starts to be clamped between the two first conductive blocks 51 to enable the shunt unit 5 to be conducted, at the moment, the alarm contact 354 is positioned in the area between the first conductive blocks 51 and the second conductive blocks 62, along with the increase of the temperature, the displacement generated by the trigger assembly 35 is increased, the shunt contact 353 keeps close contact with the two first conductive blocks 51 to enable the shunt unit 5 to be conducted, when the temperature sensed by the bimetallic strip 33 reaches a second limiting value, the alarm contact 353 starts to be clamped between the two second conductive blocks 62 to enable the alarm unit 6 to be conducted, the shunt unit 5 and the alarm unit 6 are simultaneously conducted, the time required for maintenance of a ascending line after receiving an alarm is shortened, the shunt unit 5 can relieve the heating state of the drainage plate 11 to a certain extent, the current through the drainage plate 11 is prevented from being suddenly increased due to sudden disconnection of the shunt unit 5, and the burning of the drainage plate 11 is prevented;
the shunt contact 353 and the alarm contact 354 are respectively clamped in from cambered surface insulation guide openings arranged on the first conductive block 51 and the second conductive block 62, the cambered surface insulation guide openings are in a gradually narrowed shape with smooth surfaces, the shunt contact 353 and the alarm contact 354 can be assisted to be accurately clamped in between the corresponding conductive blocks, and the situation that the shunt unit 5 and the alarm unit 6 cannot be normally conducted due to position deviation of the shunt 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 a screw, the end portions of the ejector plate 351 are respectively slidably abutted on the inner wall of the insulating bracket 32, two ends of the ejector plate 351 are respectively slidably equipped with a sliding connecting seat 34, and two ends of the bimetal 33 are respectively rotationally matched with the sliding connecting seats 34, so that when the bimetal 33 is deformed by heating, two ends of the bimetal 33 are tilted up to drive the two sliding connecting seats 34 to slide towards directions approaching to each other, and simultaneously the ejector plate 351 is jacked up to enable the whole trigger assembly 35 to generate displacement.
Referring to fig. 8, further, the two ends of the bimetal 33 are respectively provided with a fixed connection seat 331, the sliding connection seat 34 includes a T-shaped clamping block and a shaft seat, two ends of the surface of the ejector plate 351 are respectively provided with a clamping hole, the T-shaped clamping block is respectively and slidably assembled on the clamping hole, the shaft seat is respectively and rotatably matched with a fixed shaft on the fixed connection seat 331, so that the fixed connection seat 331 at two ends of the bimetal 33 is kept connected with the sliding connection seat 34 and drives the ejector plate 351 to move when the bimetal 33 is deformed by heating.
When the invention is used, the metal heat-conducting plate 31 conducts a part of the temperature of the surface of the drainage plate 11 to the bimetallic strip 33 in real time through the heat-conducting base 311 and the heat-conducting sleeve 312, so that the bimetallic strip 33 can sense the temperature change of the drainage plate 11 in real time, the two ends of the bimetallic strip 33 are tilted up when being heated, the fixed connecting seats 331 at the two ends drive the two sliding connecting seats 34 to slide towards the directions approaching to each other and jack up the ejector plate 351, and the ejector plate 351 drives the insulating connecting rod 352 to displace, so that the positions of the shunt contact 353 and the alarm contact 354 on the insulating connecting rod 352 are changed; when the temperature sensed by the bimetallic strip 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 surface insulation guide openings, the shunt lead is connected, a part of current flowing through the lead 2 flows out of the junction of the drainage plate 11 and the connecting plate 12, the other part of current flows out of the shunt lead, the shunt is realized, along with the rising of the surface temperature of the drainage plate 11, the temperature sensed by the bimetallic strip 33 is also increased, the alarm contact 354 gradually approaches the second conductive block 62, the shunt contact 353 keeps in close contact with the two first conductive blocks 51, the shunt unit 5 is kept on, 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 from the corresponding cambered surface insulation guide openings, the alarm system 61 is conducted, and an alarm is sent to ground maintenance personnel.
Referring to fig. 9, further, the connection plate 12 and the metal heat-conducting plate 31 are respectively disposed at two sides of the drainage plate 11, the fastening bolts 13 are assembled on the connection plate 12, the drainage plate 11 and the metal heat-conducting plate 31 through threads, and the extrusion mechanism 4 is mounted at one side of the drainage plate 11 where the connection plate 12 is disposed and directly extrudes the connection plate 12, so that when the fastening bolts 13 are loosened or the parts are damaged, the connection plate 12 is directly extruded through the extrusion mechanism 4, and the drainage plate 11, the connection plate 12 and the metal heat-conducting plate 31 can be kept in close contact with each other all the time.
Referring to fig. 9, further, the pressing mechanism 4 includes a fixing shell 41, an elastic pressing member 42 and a pressing plate 43, where the fixing shell 41 is fixedly installed on one side of the drainage plate 11, two ends of the elastic pressing 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 connection plate 12, and when the fastening bolt 13 is in a fastening state, the elastic pressing member 42 is in a fully compressed force accumulation state, so that when the fastening bolt 13 loosens or the parts are damaged, a gap exists between the drainage plate 11, the connection plate 12 and the metal heat-conducting plate 31, the elastic pressing member 42 can be automatically released, so that the pressing plate 43 presses the connection plate 12, the contact tightness between the drainage plate 11, the connection plate 12 and the metal heat-conducting plate 31 is improved, the contact resistance between the drainage plate 11 and the connection plate 12 is reduced, the heating value of the drainage plate 11 is reduced, the accuracy of the temperature sensing of the metal heat-conducting plate 31 to the drainage plate 11 is also ensured, and the sensing error is reduced. Specifically, the pressing elastic member 42 may be a spring provided with an insulating layer on the surface.
When the invention 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 are loosened or parts are lost, the extrusion elastic piece 42 is automatically released from the force storage state, 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 main clamp pipe 14, a drainage pipe 15, and a shunt wire sleeve 16, the main clamp pipe 14 is provided with a steel anchor, the drainage plate 11 and the connection plate 12 are respectively arranged at the ends of the main clamp pipe 14 and the drainage pipe 15, and the ports of the main clamp pipe 14 and the drainage pipe 15 are respectively connected with a wire 2;
the wire clamp main pipe 14 and the drainage tube 15 are respectively 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, the shunt wire is fixedly sleeved in the shunt wire sleeve 16, and the first conductive blocks 51 are all positioned at the end parts of the shunt wire sleeve 16.
When the current flow device is used, current flows from the current input end of the lead 2 to the output end of the lead 2 through the main clamping pipe 14, the drainage plate 11, the connecting plate 12 and the drainage pipe 15 in sequence, when the surface temperature of the drainage plate 11 is too high, the flow dividing unit 5 is conducted, a part of the current input into the main clamping pipe 14 from the input end of the lead 2 is conveyed through an original path, and a part of the current is conveyed to the output end of the lead 2 through the flow dividing wire sleeve 16 and the drainage pipe 15 in sequence, so that flow dividing is realized.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a strain clamp for electric power engineering, includes strain clamp body (1), temperature sense trigger mechanism (3), extrusion mechanism (4), reposition of redundant personnel unit (5), alarm unit (6), its characterized in that: the strain clamp comprises a strain clamp body (1) and is characterized in that the strain clamp body (1) is used for connecting a wire (2), the strain clamp body (1) comprises a drainage plate (11), a connecting plate (12) and a fastening bolt (13), the drainage plate (11), the connecting plate (12) and a temperature sensing trigger mechanism (3) are connected through the fastening bolt (13) and kept in close contact under the action of the extrusion mechanism (4), so that the contact resistance is reduced, and the temperature sensing effect of the temperature sensing trigger mechanism (3) on the drainage plate (11) is guaranteed;
when the temperature sensed by the temperature sensing trigger mechanism (3) reaches a first limit value, triggering the shunt unit (5) to shunt the lead (2) so as to reduce the heating value of the drainage plate (11), and if the temperature of the drainage plate (11) rises back and continues to rise, the shunt unit (5) can be kept on, and when the temperature sensed by the temperature sensing trigger mechanism (3) reaches a second limit value, triggering the alarm unit (6) to give an alarm;
the temperature sensing trigger mechanism (3) comprises a metal heat conducting plate (31), an insulating support (32), a bimetallic strip (33), a sliding connecting seat (34) and a trigger assembly (35), wherein the insulating support (32) is fixedly arranged 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);
the double-metal heat conducting plate (31) is attached to the drainage plate (11), the middle of the double-metal sheet (33) is fixedly connected with the metal heat conducting plate (31), two ends of the double-metal sheet (33) are respectively connected with the trigger component (35) through the sliding connecting seat (34), the trigger component (35) is driven to displace through deformation caused by heating of the double-metal sheet (33), and the trigger component (35) moves to a specified position to enable the shunt unit (5) and the alarm unit (6) to be conducted.
2. The strain clamp for electrical engineering according to claim 1, wherein: the shunt unit (5) comprises a shunt wire and a first conductive block (51), wherein two ends of the shunt wire are respectively connected with the wire (2), the shunt wire penetrates through the insulating support (32) and is provided with a first circuit breaking opening at the inner side of the insulating support (32), and the first conductive block (51) is respectively and fixedly connected with two ends of the first circuit breaking opening;
the alarm unit (6) comprises an alarm system (61) and a second conductive block (62), the alarm system (61) is fixedly arranged on the insulating bracket (32), a second circuit breaking 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 respectively and fixedly connected to two ends of the first circuit breaking opening;
the trigger assembly (35) comprises an ejector plate (351), and cambered surface insulation guide openings are formed in one sides, close to the ejector plate (351), of the first conductive block (51) and the second conductive block (62).
3. The strain clamp for electrical engineering according to claim 2, wherein: the trigger assembly (35) further comprises 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 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 conduct the shunt unit (5), the alarm contact (354) is positioned 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 conduct the alarm unit (6), the shunt contact (353) keeps in contact with the first conductive blocks (51).
4. A strain clamp for electrical engineering according to claim 3, wherein: the metal heat conduction 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 on heat conduction cover (312) and through the fix with screw, liftout plate (351) tip respectively sliding butt is in on insulating support (32) inner wall, liftout plate (351) both ends respectively sliding fit have sliding connection seat (34), bimetallic strip (33) both ends respectively with sliding connection seat (34) normal running fit.
5. The strain clamp for electrical engineering according to claim 4, wherein: the double metal sheets (33) are respectively provided with a fixed connecting seat (331), the 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 ejector plate (351), the T-shaped clamping blocks are respectively and slidably assembled on the clamping holes, and the shaft seat is respectively and rotatably matched with a fixed shaft on the fixed connecting seat (331).
6. The strain clamp for electrical engineering according to claim 5, wherein: the connecting plate (12) and the metal heat-conducting plate (31) are respectively arranged on two sides of the drainage plate (11), the fastening bolts (13) are assembled on the connecting plate (12) and the drainage plate (11) and the metal heat-conducting plate (31) through threads, and the extrusion mechanism (4) is arranged on one side of the drainage plate (11) where the connecting plate (12) is arranged and directly extrudes the connecting plate (12).
7. The strain clamp for electrical engineering according to claim 6, wherein: the extrusion mechanism (4) comprises a fixed shell (41), an extrusion elastic piece (42) and a pressing plate (43), wherein the fixed shell (41) is fixedly installed on one side of the drainage plate (11), two ends of the extrusion elastic piece (42) are respectively connected with the inner wall of the fixed 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 extrusion elastic piece (42) is in a complete compression force accumulation state when the fastening bolt (13) is in a fastening state.
8. The strain clamp for electrical engineering according to claim 7, wherein: the strain clamp comprises a strain clamp body (1), and is characterized by further comprising a clamp main pipe (14), a drainage pipe (15) and a shunt wire sleeve (16), wherein a steel anchor is arranged on the clamp main pipe (14), the drainage plate (11) and the connection plate (12) are respectively arranged at the ends of the clamp main pipe (14) and the drainage pipe (15), and the ports of the clamp main pipe (14) and the drainage pipe (15) are respectively connected with a wire (2);
the wire clamp main pipe (14) and the drainage tube (15) are respectively and fixedly connected with the split-flow wire sleeve (16), the split-flow wire is fixedly sleeved in the split-flow wire sleeve (16), and the first conductive blocks (51) are all positioned at the end parts of the split-flow wire sleeve (16).
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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 CN115173350A (en) | 2022-10-11 |
| CN115173350B true 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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| CN115173350A (en) | 2022-10-11 |
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