CN109950109B - 10 KV three-phase synchronous drop-out fuse switch - Google Patents
10 KV three-phase synchronous drop-out fuse switch Download PDFInfo
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- CN109950109B CN109950109B CN201910182664.7A CN201910182664A CN109950109B CN 109950109 B CN109950109 B CN 109950109B CN 201910182664 A CN201910182664 A CN 201910182664A CN 109950109 B CN109950109 B CN 109950109B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 41
- 230000003068 static effect Effects 0.000 claims abstract description 45
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 20
- 239000012212 insulator Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 238000003780 insertion Methods 0.000 claims description 15
- 230000037431 insertion Effects 0.000 claims description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000010891 electric arc Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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Abstract
The invention discloses a 10 KV three-phase synchronous drop-out fuse switch, which comprises three groups of fuse mechanisms and insulating connecting rods for connecting the three groups of fuse mechanisms; each group of fusing mechanisms comprises a porcelain insulator, a mounting assembly, an incoming line terminal, an outgoing line terminal, an upper static contact assembly, a lower static contact assembly, an upper moving contact assembly, a lower moving contact assembly, a fusing tube, a fuse, a switching-on and switching-off bracket, a switching-on and switching-off handle and an arc extinguishing tube; the method is characterized in that: the lower moving contact component, the fusing tube and the upper moving contact component which are connected into a whole are driven to move upwards or downwards together by rotating the plug box fixing pin of the lower moving contact component to a horizontal state or a vertical state, so that the upper moving contact component and the upper fixed contact component are in compression fit or disconnected, and the switching-on or switching-off operation of the fusing mechanism is realized under the linkage of the insulating connecting rod. The invention has the advantages that: simple structure, convenient operation, up-down motion, more stable contact of the static contact, and can effectively avoid the problem of electric arc short circuit.
Description
Technical Field
The invention relates to a fusing switch, in particular to a 10 kV three-phase synchronous drop-out fusing switch.
Background
The fuse switch is a necessary protection device of a high-voltage transmission line, and can timely disconnect a fault line when the transmission line is short-circuited or overloaded, so that the line and electric equipment are prevented from being damaged.
The existing fuse for the outdoor transformer in China is operated in one direction, the lower contact is hung into the lower support by the insulating brake rod under the condition that the upper contact ring hole swings variably, so that three phases are operated respectively and completed separately, and the operation is difficult, time-consuming, labor-consuming and unsafe. The fuse with high technical content and high cost is not practical for the outdoor transformer fuse with large quantity and wide range.
Aiming at the defects of the fuse operated in one way, the applicant researches a fuse capable of being operated in a three-phase linkage manner, and the fuse is modified for a plurality of times and improved continuously, and for the fuse operated in the three-phase linkage manner, a three-phase linkage type drop-out fuse with the patent number of 200620098873.1, a three-phase linkage type drop-out fuse with the patent number of 200720083838.7, a semi-automatic synchronous drop-out fuse with the patent number of 201020174695.2, a semi-automatic three-phase synchronous drop-out fuse with the patent number of 201110342804.6 and an automatic three-phase synchronous drop-out fuse with the patent number of 201410190837.7 are applied respectively.
Aiming at an automatic three-phase synchronous drop-out fuse with the patent number of 201410190837.7, the applicant finds that the fuse is not optimized in the whole structure, the contact between an upper moving contact and a lower moving contact and a fixed contact is not stable enough, and the arc extinguishing function can not be realized, so that the problem that when the fuse breaks down and breaks down under overload of a transformer, a large arc or strong wind generates an arc short circuit can not be solved, and when the large arc or the arc short circuit occurs, the normal circular shape of a power system can be influenced, and then tripping is generated, so that the problem of large-area power failure is caused, and huge economic loss is brought.
In order to further simplify the whole structure, make the contact of the upper and lower moving contacts and the static contact more stable and avoid the problem of electric arc short circuit, the applicant makes a great modification and makes the '10 KV three-phase synchronous drop-out fuse switch' of the application
Through retrieval, the same patent application as the application does not exist in China.
Disclosure of Invention
The invention aims to provide a 10 kV three-phase synchronous drop-out fuse switch, which is used for overcoming the defects in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that: a10 KV three-phase synchronous drop-out fuse switch comprises three groups of fuse mechanisms and insulating connecting rods connected with the three groups of fuse mechanisms; each group of fusing mechanisms comprises a porcelain insulator, a mounting assembly, an incoming line terminal, an outgoing line terminal, an upper static contact assembly, a lower static contact assembly, an upper moving contact assembly, a lower moving contact assembly, a fusing tube, a fuse, a switching-on and switching-off bracket and a switching-on and switching-off handle; the middle part of the porcelain bottle is fixedly connected with the transformer mounting rack through a mounting component; the upper end of the porcelain insulator is fixedly connected with an incoming line terminal and one end of an upper static contact component respectively, the lower end of the porcelain insulator is fixedly connected with an outgoing line terminal and one end of a lower static contact component respectively, the upper movable contact component is arranged at the upper end of the fuse tube, the lower movable contact component is arranged at the lower end of the fuse tube, the fuse is arranged in the fuse tube in a penetrating mode, one end of the fuse is fixedly connected with the upper movable contact component, the other end of the fuse is fixedly connected with the lower movable contact component, the switching-on and switching-off support is arranged at the lower end of the fuse tube, one end of the switching-on and switching-off support is hinged with the lower movable contact component, the other end of the switching-on and switching-off handle is fixedly connected with the insulating connecting rod through a; thereby realize the synchronous linkage divide-shut brake operation of three-phase, wherein:
the lower moving contact component comprises a fuse tube socket, a pin, an insert box, a support piece, a hasp and an insert box fixing pin, the fuse tube socket is fixedly sleeved at the lower end of the fuse tube and is fixedly connected with the pin through the support piece, the pin is nested and matched with the insert box, one end of the insert box is hinged with the insert box fixing pin, the other end of the insert box is hinged with the divide-shut brake support, one end of the hasp is hinged with the fuse tube socket, the other end of the hasp is hooked with a fuse wire coming out of the fuse tube, and the insert box fixing pin is connected with the lower static contact component in a rotating fit manner;
when the plug box fixing pin rotates to be in a horizontal state, the lower moving contact component drives the plug pins, the plug box, the supporting piece, the hasp, the fuse tube and the upper moving contact component to move downwards through the plug box fixing pin, so that the upper moving contact component and the upper static contact component are in a switching-off state;
when the plug box fixing pin rotates to be in a vertical state, the lower moving contact component drives the plug pin, the plug box, the supporting piece, the hasp, the fuse tube and the upper moving contact component to move upwards through the plug box fixing pin, so that the upper moving contact component and the upper static contact component are in a closing state.
In the technical scheme, each group of the fusing mechanisms further comprises an arc extinguishing pipe, the arc extinguishing pipe movable cover is arranged at the upper end of the fusing pipe and is elastically connected with the upper end of the fusing pipe through a spring, the spring is fixedly sleeved on the outer pipe wall of the fusing pipe, and the upper moving contact assembly penetrates through the arc extinguishing pipe.
In the above technical scheme, the upper static contact assembly includes a stainless steel cover, an upper contact steel sheet and a presser foot spring, one end of the stainless steel cover is respectively and fixedly connected with an upper contact plate and a wire inlet terminal of the porcelain insulator, the other end of the stainless steel cover is in press fit with the upper moving contact assembly through the presser foot spring and the upper contact steel sheet, and the presser foot spring is arranged between the stainless steel cover and the upper contact steel sheet and is located at one end of the upper contact steel sheet in press fit with the upper moving contact assembly.
In the above technical scheme, the upper moving contact assembly comprises an upper contact nut and an upper contact, the upper contact is fixed at the upper end of the fuse tube, and the upper contact nut is fixed at the upper end of the upper contact and is in tight fit with an upper contact steel sheet of the upper static contact assembly in a pressing manner.
In the above technical scheme, the lower static contact assembly comprises a base and two bolts, one end of the base is respectively and fixedly connected with the lower contact plate of the porcelain insulator, and the other end of the base is in locking connection with the plug box fixing pin of the lower static contact assembly through the two bolts.
In the technical scheme, the two bolts are respectively and correspondingly inserted into bolt holes in arc-shaped hooking outer side walls on the left side and the right side of the base;
the plug box fixing feet are arranged on the inner sides of the arc-shaped hooks on the left side and the right side of the base in a penetrating manner;
the box inserting fixing pin comprises a left box inserting positioning block and a right box inserting positioning block which are connected with each other, a first pin and a pin positioning pin are arranged on the outer sides of the left box inserting positioning block and the right box inserting positioning block respectively, a connecting plate is arranged on the inner sides of the left box inserting positioning block and the right box inserting positioning block respectively, the left box inserting positioning block and the right box inserting positioning block are connected and fixed with each other through respective connecting plates, the left box inserting positioning block and the right box inserting positioning block are correspondingly arranged in semicircular hook grooves which are hooked up in an arc shape on the left side and the right side of the base respectively through respective first pin and are connected with the base in a locking manner through two pins which are inserted in pin holes of the arc-shaped hook outer side walls on the left side and the right side of the base respectively, and the left box inserting positioning block and the right box inserting positioning block are also correspondingly inserted in pin grooves which are hooked;
the positioning hook grooves are formed in the inner side walls hooked by the arcs on the left side and the right side of the base and are respectively matched with the left inserting box positioning block and the right inserting box positioning block of the inserting box fixing foot in a clamping mode.
In the technical scheme, the left and right box inserting positioning blocks are respectively provided with a first through hole, and the box inserting fixing pins are respectively and correspondingly matched with second pin pins arranged at the lower ends of the left and right outer side walls of the box inserting through the first through holes arranged on the left and right box inserting positioning blocks in a rotating way;
the upper ends of the left and right outer side walls of the insertion box are respectively provided with an ear boss, each ear boss is provided with a second through hole, and the second through holes formed on the ear bosses on the left and right sides of the insertion box are respectively correspondingly connected with the third through holes formed on the forking legs on the left and right sides of the opening and closing support through pins;
the middle part of the inserting box is provided with an inserting box hole, and the inserting box is correspondingly embedded, matched and connected with the arc-shaped plug of the inserting pin through the inserting box hole.
In the technical scheme, the plug pins comprise two arc-shaped plugs, two insertion blocks and a middle connecting block, the two arc-shaped plugs are arranged on the left side and the right side of the lower end of the middle connecting block in parallel, and the two insertion blocks are arranged on the left side and the right side of the upper end of the middle connecting block in parallel;
the two arc-shaped plugs are correspondingly embedded in the box inserting holes of the inserting box;
the two insertion blocks are respectively and correspondingly fixedly connected with the two lug plates of the fuse tube socket through a supporting piece; .
In the above technical solution, each ear plate is provided with a fourth through hole, a fifth through hole and an arc-shaped hook groove;
each insert block is provided with a sixth through hole and a seventh through hole;
an eighth through hole and a ninth through hole are formed in each supporting piece;
the eighth through hole and the ninth through hole on each supporting piece respectively correspond to the seventh through hole on the inserting block and the fifth through hole on the ear plate which are correspondingly connected with the eighth through hole and the ninth through hole, and are connected with the fifth through hole through a pin;
the sixth through holes on the two insert blocks correspond to the arc-shaped hook grooves on the two ear plates and are connected through pins;
the fourth through holes on the two ear plates correspond to the tenth through hole on the hasp and are connected through a pin.
In addition, in order to prolong the service life of the 10 kV three-phase synchronous drop-out fuse switch, the upper static contact component, the lower static contact component, the upper moving contact component and the lower moving contact component are all made of metal steel materials with high wear resistance.
Compared with the prior art, the invention has the advantages and beneficial effects that:
(1) compared with the current patent 201410190837.7, namely 'an automatic three-phase synchronous drop-out fuse', the invention changes the original push-buckle pressing connection of the upper moving contact component and the upper static contact component into the existing pressing foot spring pressing connection, so that the whole fuse is greatly simplified in structure, and meanwhile, the contact between the upper moving contact and the lower static contact is more stable;
(2) according to the invention, the lower fixed contact assembly, the fusing tube and the upper movable contact assembly are driven to push upwards or turn downwards by rotating the plug box fixing pins to a horizontal state and a vertical state, so that the upper movable contact assembly and the upper fixed contact assembly are pressed or disconnected, and the switching-on and switching-off operations of the fusing mechanism are realized, therefore, the operation is convenient, and the connection is reliable and stable;
(3) through the arc extinguishing pipe design of establishing at last moving contact subassembly dustcoat to utilize the spring to control the concertina movement of arc extinguishing pipe and fuse-link, and then play and cut the arc operation, effectually avoided when cutting off the power supply in the twinkling of an eye, the circuit short circuit problem that causes because of the electric arc spark that produces between last moving contact subassembly and the last static contact subassembly.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural view of the single-phase fuse mechanism in an open state in fig. 1;
FIG. 3 is an enlarged schematic view at node A of FIG. 2;
FIG. 4 is an enlarged schematic view at node B of FIG. 2;
fig. 5 is a schematic structural view of the single-phase fusing mechanism in a closing state in fig. 1;
FIG. 6 is an enlarged schematic view at node C of FIG. 5;
FIG. 7 is an enlarged schematic view at node D in FIG. 5;
fig. 8 is a plan exploded schematic view of the lower fixed contact assembly and the lower movable contact assembly of the single phase fuse mechanism of fig. 1;
FIG. 9 is a top view of the base of FIG. 8;
FIG. 10 is a right side view of the base of FIG. 8;
fig. 11 is a top view of the fuse socket of fig. 8;
fig. 12 is a bottom view of the pin of fig. 8;
FIG. 13 is a top view of the cartridge of FIG. 8;
FIG. 14 is a sectional view taken along line A-A of FIG. 13;
FIG. 15 is a top view of the insert retaining leg of FIG. 8;
FIG. 16 is a top view of the left cartridge positioning block of FIG. 11;
FIG. 17 is a top view of the right cartridge positioning block of FIG. 11;
fig. 18 is a perspective view of the opening and closing bracket;
in the figure:
100. a fusing mechanism;
200. an insulating connecting rod;
1. a porcelain bottle;
2. mounting the plate assembly;
3. an incoming terminal;
4. an outlet terminal;
5. an upper static contact component; 5.1, a stainless steel cover; 5.2, the upper contact contacts the steel sheet; 5.3, a presser foot spring;
6. a lower stationary contact assembly; 6.1, a base; 6.1.1, hooking in an arc shape; 6.1.2, bolt holes; 6.1.3, a semicircular hook groove; 6.1.4, positioning hook grooves; 6.2, a bolt;
7. an upper moving contact assembly; 7.1, an upper contact nut; 7.2, an upper contact;
8. a lower moving contact assembly; 8.1, a fuse tube socket; 8.1.1, ear plate; 8.1.1a, a sixth through hole; 8.1.1b, a seventh via; 8.1.1c, an arc-shaped hook groove;
8.2, pins; 8.2.1, arc plug; 8.2.2, inserting blocks; 8.2.2a, a fourth through hole; 8.2.2b, a fifth through hole; 8.2.3, an intermediate connecting block;
8.3, inserting a box; 8.3.1, a second foot pin; 8.3.2, ear convex; 8.3.2a, a second through hole; 8.3.3, inserting box holes;
8.4, a support member; 8.4.1, an eighth through hole; 8.4.2, a ninth via;
8.5, a hasp; 8.5.1, a tenth via;
8.6, inserting box fixing feet; 8.6.1, a left box positioning block; 8.6.2, a right plug box positioning block; 8.6.3, a first foot pin; 8.6.4, pin positioning; 8.6.5, connecting plates; 8.6.6, a first via;
9. fusing the tube;
10. a fuse;
11. a switch-on and switch-off bracket; 11.1, a bifurcated foot; 11.1a, a third through hole;
12. a switching-on and switching-off handle 12.1 and a fixing clamp; 12.1a, hook sheet
13. An arc extinguishing tube;
14. a spring.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following description further explains how the invention is implemented by combining the attached drawings and the detailed implementation modes.
As shown in fig. 1, the 10 kv three-phase synchronous drop-out fuse switch provided by the present invention comprises three sets of fuse mechanisms 100 and an insulating connecting rod 200 connecting the three sets of fuse mechanisms 100, wherein the insulating connecting rod 200 is a high-strength insulating resin rod;
as shown in fig. 2 to 7, each set of fusing mechanism 100 includes a porcelain bottle 1, a mounting assembly 2, an incoming line terminal 3, an outgoing line terminal 4, an upper static contact assembly 5, a lower static contact assembly 6, an upper moving contact assembly 7, a lower moving contact assembly 8, a fusing tube 9, a fuse 10, a switching bracket 11, a switching handle 12 and an arc extinguishing tube 13; the middle part of the porcelain bottle 1 is fixedly connected with a transformer mounting rack (not shown in the figure) through a mounting component 2; the upper end of the porcelain insulator 1 is fixedly connected with an incoming terminal 3 and one end of an upper static contact component 5 respectively; the lower end of the porcelain insulator 1 is fixedly connected with an outlet terminal 4 and one end of a lower static contact component 6 respectively; the upper moving contact component 7 is fixedly arranged at the upper end of the fuse tube 9 and is in compression fit with the other end of the upper static contact component 5; the lower moving contact component 8 is fixedly arranged at the lower end of the fusing tube 9 and is connected with the other end of the lower fixed contact component 6 in a rotating fit manner; the fuse 10 is arranged in the fuse tube 9 in a penetrating way, one end of the fuse is fixedly connected with the upper moving contact component 7, and the other end of the fuse is fixedly connected with the lower moving contact component 8; the switching-on and switching-off support 11 is positioned at the lower end of the fuse tube 9, one end of the switching-on and switching-off support is hinged with the lower movable contact assembly 8, and the other end of the switching-on and switching-off support is fixedly connected with the switching-on and switching-off handle 12; the insulating connecting rod 300 connects the three groups of fusing mechanisms 100 in series together through the fixing clamp 12.1 arranged on the switching-on and switching-off handle 12 of the three groups of fusing mechanisms 100 in a penetrating manner, so that the three-phase synchronous linkage switching-on and switching-off operation is realized, wherein:
as shown in fig. 3 and 6, the arc extinguishing tube 13 is movably covered on the upper end of the fuse tube 9 and is elastically connected with the upper end of the fuse tube 9 through a spring 14, the spring 14 is fixedly sleeved on the outer tube wall of the fuse tube 9, and the upper moving contact assembly 7 is arranged in the arc extinguishing tube 13 in a penetrating manner.
As shown in fig. 3 and 6, when the fuse link 100 is in the open state, the spring 14 is in the free state, and the arc extinguishing tube 13 completely covers the upper movable contact assembly 7; when the fusing mechanism 100 is in a closing state, the spring 14 is in a compressed state, and at this time, the upper movable contact assembly 7 extends out of the arc extinguishing tube 13 and is in press fit with the upper fixed contact assembly 5.
As shown in fig. 6, the upper static contact assembly 5 includes a stainless steel cover 5.1, an upper contact steel sheet 5.2 and a presser foot spring 5.3, one end of the stainless steel cover 5.1 is respectively and fixedly connected with the upper contact plate 1.1 of the porcelain insulator 1 and the wire inlet terminal 3, the other end is in pushing fit with the upper moving contact assembly 7 through the presser foot spring 5.3 and the upper contact steel sheet 5.2, and the presser foot spring 5.3 is arranged between the stainless steel cover 5.1 and the upper contact steel sheet 5.2 and is located at one end of the upper contact steel sheet 5.2 in pressing fit with the upper moving contact assembly 7.
As shown in fig. 4, 7 and 8, the lower movable contact assembly 8 includes a fuse socket 8.1, a pin 8.2, a socket 8.3, a support member 8.4, a buckle 8.5 and a socket fixing pin 8.6; the fuse tube socket 8.1 is fixedly sleeved at the lower end of the fuse tube 9 and is fixedly connected with one end of the pin 8.2 through a support piece 8.4; the other end of the pin 8.2 is nested and matched with the plug box 8.3; one end of the plug-in box 8.3 is hinged with a plug-in box fixing pin 8.6, and the other end is hinged with the opening and closing support 11; one end of the hasp 8.5 is hinged with the fuse tube socket 8.1, and the other end is hooked with the fuse wire 10 coming out of the fuse tube 9; the plug box fixing pin 8.6 is connected with the lower static contact component 6 in a rotating fit manner.
As shown in fig. 2 to 4, when the plug box fixing pin 8.6 rotates to be in a horizontal state, the lower moving contact assembly 8 drives the pin 8.2, the plug box 8.3, the support member 8.4, the hasp 8.5, the fuse tube socket 8.1, the fuse tube 9 and the upper moving contact assembly 7 to move downward together through the plug box fixing pin 8.6, and at this time, the upper moving contact assembly 7 is disconnected from the upper fixed contact assembly 5 under the driving of the plug box fixing pin 8.6, so that a switching-off state as shown in fig. 2 occurs, that is, the fusing mechanism 100 is in a switching-off state at this time;
as shown in fig. 5 to 7, when the plug box fixing pin 8.6 rotates to be in a vertical state, the lower moving contact assembly 8 drives the pin 8.2, the plug box 8.3, the support member 8.4, the buckle 8.5, the fuse tube socket 8.1, the fuse tube 9 and the upper moving contact assembly 7 to move upward together through the plug box fixing pin 8.6, and at this time, the upper moving contact assembly 7 is pressed against the upper fixed contact assembly 5 under the upward pushing action of the fuse tube 9, so that a closing state as shown in fig. 5 occurs, that is, the fusing mechanism 100 is in the closing state at this time.
In practical application, an operator can hook the hook piece 12.1a of the fixing clip 12.1 of the opening and closing handle 12 of the intermediate phase fusing mechanism 100 in the three-phase synchronous drop-out fuse switch of the present invention through an additional equipped insulation rod (not shown in the figure), and push or pull the opening and closing handle 12 of the intermediate phase fusing mechanism 100 upwards, so as to realize synchronous opening and closing operations of the three sets of fusing mechanisms 100 through the insulation connecting rod 200.
As shown in fig. 3 and 6, the upper moving contact assembly 7 includes an upper contact nut 7.1 and an upper contact 7.2, the upper contact 7.2 is fixed on the upper end of the fuse tube 9, the upper contact nut 7.1 is fixed on the upper end of the upper contact 7.2 and is tightly pressed and matched with the upper contact steel sheet 5.2 of the upper fixed contact assembly 5.
As shown in fig. 4, 7 and 8, the lower stationary contact assembly 6 includes a base 6.1 and two pins 6.2, one end of the base 6.1 is fixedly connected with the lower contact plate 1.2 of the porcelain insulator 1, and the other end is connected with the plug box fixing pin 8.6 of the lower movable contact assembly 8 by the two pins 6.2 in a locking manner; wherein:
as shown in fig. 8, 9 and 10, two pins 6.2 are respectively and correspondingly inserted into pin holes 6.1.2 on the outer side walls of the left and right arc-shaped hooks 6.1.1 of the base 6.1;
the box fixing feet 8.6 are arranged at the inner sides of the arc-shaped hooks 6.1.1 at the left and right sides of the base 6.1 in a penetrating way;
as shown in fig. 15, the plug box fixing pin 8.6 includes a left plug box positioning block 8.6.1 and a right plug box positioning block 8.6.1 and 8.6.2 connected to each other, as shown in fig. 16 and 17, a first pin 8.6.3 and a pin positioning pin 8.6.4 are respectively disposed at the outer sides of the left plug box positioning block 8.6.1 and the right plug box positioning block 8.6.2, a connecting plate 8.6.5 is respectively disposed at the inner sides of the left plug box positioning block 8.6.1 and the right plug box positioning block 8.6.2, the left plug box positioning block 8.6.1 and the right plug box positioning block 386.6.2 are connected and fixed to each other through the respective connecting plate 2, and the left plug box positioning block 8.6.1 and the right plug box positioning block 8.6.2 are respectively inserted through the respective first pin 8.6.3 into the semicircular hook groove 6.1.3 of the left arc hook 6.1.1 at the left side and the right side arc hook 6.1.1, and are respectively inserted into the corresponding pin positioning pins 6.6.1.6.2 of the two outer side pin holes of the left arc hook 6.1 and the right pin 6.1, and are also inserted into the corresponding pin 6.6.2 and the two plug pin positioning blocks 396.4 and the left base 6.6.6.2, and the left plug box positioning block, The right two sides arc-shaped hook 6.1.1 inside foot positioning pin slot (not shown in the figure), the box fixing foot 8.6 realizes positioning fit with the base 6.1 through the foot positioning pin 8.6.4.
As shown in fig. 9, the inner side walls of the arc-shaped hooks 6.1.1 on the left and right sides of the base 6.1 are respectively provided with a positioning hook groove 6.1.4, and the two positioning hook grooves 6.1.4 are respectively correspondingly matched with the left and right box positioning blocks 8.6.1, 8.6.2 of the box fixing foot 8.6 in a clamping manner; the positioning hook groove 6.1.4 can play a good positioning and blocking role so that the up-and-down moving and static contacts can be more stable when in contact.
As shown in fig. 8, the left and right cartridge positioning blocks 8.6.1, 8.6.2 are each further provided with a first through hole 8.6.6, and the cartridge fixing pin 8.6 is respectively and correspondingly matched with a second pin 8.3.1 provided at the lower ends of the left and right outer side walls of the cartridge 8.3 through the first through holes 8.6.6 provided on the left and right cartridge positioning blocks 8.6.1, 8.6.2;
as shown in fig. 8, the upper ends of the left and right outer side walls of the insertion box 8.3 are respectively provided with an ear protrusion 8.3.2, each ear protrusion 8.3.2 is provided with a second through hole 8.3.2a, as shown in fig. 8 and fig. 18, the second through holes 8.3.2a formed in the ear protrusions 8.3.2 on the left and right sides of the insertion box 8.3 are respectively connected with the third through holes 11.1a formed in the forked legs 11.1 on the left and right sides of the opening and closing support 11 through pins;
as shown in fig. 13 and 14, a box insertion hole 8.3.3 is formed in the middle of the box insertion 8.3, and the box insertion hole 8.3.3 is correspondingly connected with the arc-shaped plug 8.2.1 of the pin 8.2 in a matched and embedded manner.
As shown in fig. 8 and 12, the pin 8.2 includes two arc plugs 8.2.1, two insertion blocks 8.2.2 and a middle connection block 8.2.3, the two arc plugs 8.2.1 are disposed in parallel at the left and right sides of the lower end of the middle connection block 8.2.3, and the two insertion blocks 8.2.2 are disposed in parallel at the left and right sides of the upper end of the middle connection block 8.2.3;
the two arc-shaped plugs 8.2.1 are correspondingly embedded in the box inserting holes 8.3.3 of the box inserting 8.3;
as shown in fig. 8 and 11, the two plug blocks 8.2.2 are respectively fixedly connected to the two lugs 8.1.1 of the fuse tube socket 8.1 via a support 8.4; .
As shown in fig. 11, each ear plate 8.1.1 is provided with a fourth through hole 8.1.1a, a fifth through hole 8.1.1 and an arc-shaped hook groove 8.1.1 c;
as shown in fig. 8, each insert 8.2.2 is provided with a sixth through hole 8.2.2a and a seventh through hole 8.2.2 b;
as shown in fig. 8, each support member 8.4 is provided with an eighth through hole 8.4.1 and a ninth through hole 8.4.2;
the eighth through hole 8.4.1 and the ninth through hole 8.4.2 on each support 8.4 respectively correspond to the seventh through hole 8.2.2b on the insert block 8.2.2 and the fifth through hole 8.1.1b on the ear plate 8.1.1 which are correspondingly connected with the support, and are connected with each other through a pin;
the sixth through holes 8.2.2a on the two insertion blocks 8.2.2 correspond to the arc-shaped hook grooves 8.1.1c on the two ear plates 8.1.1 and are connected through pins;
the fourth through holes 8.1.1a on the two ear plates 8.1.1 correspond to the tenth through holes 8.5.1 on the hasp 8.5 and are connected through pins.
In addition, for the service life of the 10 kv three-phase synchronous drop-out fuse switch, the upper static contact component 5, the lower static contact component 6, the upper moving contact component 7 and the lower moving contact component 8 are all made of metal steel materials with high wear resistance.
In addition, the 10 kv three-phase synchronous drop-out fuse switch is also provided with a special insulating link rod, and the insulating link rod has the same structure as the link rod disclosed in 201410190837.7 entitled "an automatic three-phase synchronous drop-out fuse", so the detailed structure thereof is not repeated here.
The working principle of the 10 kV three-phase synchronous drop-out fuse switch provided by the invention is as follows:
when the three-phase synchronous drop-out fuse switch needs to be switched on:
firstly, an insulating brake bar (namely a brake bar disclosed in an automatic three-phase synchronous drop-out fuse with the patent number of 201410190837.7) is connected with a hook piece 12.1a on a fixed clamp 12.1 at the tail end of an opening and closing handle 12 of an intermediate phase fusing mechanism 100 in the 10 kilovolt three-phase synchronous drop-out fuse, then, the switching-on and switching-off handle 12 of the intermediate phase fusing mechanism 100 is pushed upwards by the insulating brake pull rod, so that the insulating connecting rod 200, the switching-on and switching-off handle 12 and the inserting box 8.3 which are fixed into a whole with the insulating connecting rod rotate upwards by 90 degrees around the base 6.1 of the lower static contact component 6 along with the inserting box fixing foot 8.6 of the lower moving contact component 8 (at the moment, the inserting box fixing foot 8.6 is in a vertical state), meanwhile, the plug box 8.3 drives the pin 8.2 inserted into the plug box 8.3 and the support piece 8.4, the hasp 8.5, the fuse tube socket 8.1, the fuse tube 9 and the upper moving contact component 7 which are connected with the pin 8.2 into a whole to swing upwards and push the upper fixed contact component 5; when the plug box fixing pin 8.6 is turned upwards to a vertical state, the plug box fixing pin 8.6 is inserted into a positioning hook groove 6.1.4 of the base 6.1 to be clamped, and at the moment, the upper moving contact component 7 positioned at the upper end of the fusing tube 9 extends out of the arc extinguishing tube 13 to be in tight fit with the upper static contact component 5, so that the switching-on operation of the intermediate phase fusing mechanism 100 is completed; when the phase fusing mechanism 100 of the intermediate phase completes the switching-on operation, the phase fusing mechanisms 100 of other two phases are simultaneously driven to complete the switching-on operation under the linkage action of the insulating connecting rod 200, so that the three-phase synchronous switching-on operation of the 10 kV three-phase synchronous drop-out fuse switch is realized;
when the three-phase synchronous drop-out fuse switch of the invention needs to be switched off:
the insulating brake rod is connected with a hook piece 12.1a on a fixing clamp 12.1 of a switching-on and switching-off handle 12 of the intermediate phase fusing mechanism 100, then the switching-on and switching-off handle 12 of the intermediate phase fusing mechanism 100 is pulled downwards through the insulating brake rod, so that the insulating connecting rod 200, the switching-on and switching-off handle 12 and the plug box 8.3 which are fixed into a whole with the insulating connecting rod are rotated downwards for 90 degrees around a base 6.1 of the lower static contact component 6 along with a plug box fixing pin 8.6 of the lower movable contact component 8 (at the moment, the plug box fixing pin 8.6 is in a horizontal state), and meanwhile, the plug box 8.3 can drive a plug pin 8.2 inserted into the plug box 8.3 and a support 8.4, a hasp 8.5, a fuse tube socket 8.1, a fuse tube 9 and an upper movable contact component 7 which are connected into a whole with the plug pin 8.2 to fall downwards to be separated from the contact with the upper static contact; when the upper moving contact component 7 is separated from the contact with the upper fixed contact component 5, the arc-extinguishing tube 13 can be restored to the initial state under the action of the spring 14, so that the upper moving contact component 7 is completely covered in the arc-extinguishing tube 13, and the opening operation and the arc cutting operation of the intermediate phase fusing mechanism 100 can be realized; when the intermediate phase fusing mechanism 100 completes the opening operation and the arc cutting operation, the other two phase fusing mechanisms 100 are also driven to complete the opening operation and the arc cutting operation under the linkage action of the insulating connecting rod 200, so that the three-phase synchronous opening and the arc cutting of the 10 kilovolt three-phase synchronous drop-out fuse switch are realized.
And thirdly, when the fuse 10 of any phase in the three-phase synchronous drop-out fuse switch is fused due to a fault, the hasp 8.5 is separated from the constraint of the fuse 10, so that the fusing tube 9 is bounced open, the upper moving contact component 7 and the upper static contact component 5 are quickly disconnected, the bounced fusing tube 9 can fall to the fixing clamp 12.1 at the tail end of the switching-on/off handle 12 under the action of self weight, the insulating connecting rod 200 is knocked down, and the upper moving contact and the static contact of other two-phase fusing mechanisms 100 can be driven to be simultaneously disconnected when the insulating connecting rod 200 is knocked down, so that the purpose of three-phase synchronous disconnection is realized, and the phase-lack protection effect is achieved.
Finally, the above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields using the contents of the present specification and the attached drawings are included in the scope of the present invention.
Claims (9)
1. A10 KV three-phase synchronous drop-out fuse switch comprises three groups of fuse mechanisms (100) and an insulating connecting rod (200) connected with the three groups of fuse mechanisms (100); each group of fusing mechanisms (100) comprises a porcelain insulator (1), a mounting component (2), a wire inlet terminal (3), a wire outlet terminal (4), an upper static contact component (5), a lower static contact component (6), an upper movable contact component (7), a lower movable contact component (8), a fusing tube (9), a fuse (10), a switching-on and switching-off support (11) and a switching-on and switching-off handle (12); the middle part of the porcelain bottle (1) is fixedly connected with a transformer mounting rack through a mounting component (2); the upper end of the porcelain insulator (1) is fixedly connected with one end of a wire inlet terminal (3) and one end of an upper static contact component (5) respectively, the lower end of the porcelain insulator (1) is fixedly connected with one end of a wire outlet terminal (4) and one end of a lower static contact component (6) respectively, an upper movable contact component (7) is arranged at the upper end of a fuse tube (9), a lower movable contact component (8) is arranged at the lower end of the fuse tube (9), a fuse (10) is arranged in the fuse tube (9) in a penetrating mode, one end of the fuse is fixedly connected with the upper movable contact component (7), the other end of the fuse is fixedly connected with the lower movable contact component (8), a switching bracket (11) is arranged at the lower end of the fuse tube (9), one end of the fuse is hinged with the lower movable contact component (8), the other end of the fuse is fixedly connected with a switching handle (12), and an insulating connecting rod (300) is arranged in a fixing clamp (12.1) of the switching handle (12) of the three-group of the fusing, connecting the three groups of fusing mechanisms (100) in series; the method is characterized in that:
the lower moving contact component (8) comprises a fuse tube socket (8.1), a plug pin (8.2), a plug box (8.3), a support piece (8.4), a buckle (8.5) and a plug box fixing pin (8.6), the fuse tube socket (8.1) is fixedly sleeved at the lower end of the fuse tube (9) and fixedly connected with the plug pin (8.2) through the support piece (8.4), the plug pin (8.2) is in nested fit with the plug box (8.3), one end of the plug box (8.3) is hinged with the plug box fixing pin (8.6), the other end of the plug box is hinged with a switching-off and switching-on support (11), one end of the buckle (8.5) is hinged with the fuse tube socket (8.1), the other end of the buckle is hooked with a fuse (10) coming out of the fuse tube (9), and the plug box fixing pin (8.6) is in rotating fit with the lower fixed contact component (6);
when the plug box fixing pin (8.6) rotates to be in a horizontal state, the lower moving contact component (8) drives the plug pin (8.2), the plug box (8.3), the supporting piece (8.4), the hasp (8.5), the fuse tube (9) and the upper moving contact component (7) to move downwards through the plug box fixing pin (8.6), so that the upper moving contact component (7) and the upper static contact component (5) are in a switching-off state;
when the plug box fixing pin (8.6) rotates to be in a vertical state, the lower moving contact component (8) drives the plug pin (8.2), the plug box (8.3), the supporting piece (8.4), the hasp (8.5), the fuse tube (9) and the upper moving contact component (7) to move upwards through the plug box fixing pin (8.6), so that the upper moving contact component (7) and the upper static contact component (5) are in a closing state.
2. The 10 kv three-phase synchronous dropout fuse switch of claim 1, wherein: each group of the fusing mechanisms (100) further comprises an arc extinguishing tube (13), the arc extinguishing tube (13) is movably covered on the upper end of the fusing tube (9) and is elastically connected with the upper end of the fusing tube (9) through a spring (14), the spring (14) is fixedly sleeved on the outer tube wall of the fusing tube (9), and the upper movable contact assembly (7) is arranged in the arc extinguishing tube (13) in a penetrating manner.
3. The 10 kv three-phase synchronous dropout fuse switch of claim 1, wherein: the upper static contact assembly (5) comprises a stainless steel cover (5.1), an upper contact steel sheet (5.2) and a presser foot spring (5.3), one end of the stainless steel cover (5.1) is fixedly connected with an upper contact plate (1.1) and an incoming wire terminal (3) of the porcelain insulator (1), the other end of the stainless steel cover is in pressing fit with the upper moving contact assembly (7) through the presser foot spring (5.3) and the upper contact steel sheet (5.2), and the presser foot spring (5.3) is arranged between the stainless steel cover (5.1) and the upper contact steel sheet (5.2) and is positioned at one end of the upper contact steel sheet (5.2) which is in pressing fit with the upper moving contact assembly (7).
4. The 10 kv three-phase synchronous dropout fuse switch of claim 3, wherein: the upper moving contact component (7) comprises an upper contact nut (7.1) and an upper contact (7.2), the upper contact (7.2) is fixed at the upper end of the fuse tube (9), and the upper contact nut (7.1) is fixed at the upper end of the upper contact (7.2) and is in press fit with an upper contact steel sheet (5.2) of the upper static contact component (5).
5. The 10 kv three-phase synchronous dropout fuse switch of claim 1, wherein: the lower fixed contact assembly (6) comprises a base (6.1) and two bolts (6.2), one end of the base (6.1) is fixedly connected with the lower contact plate (1.2) of the porcelain bottle (1), and the other end of the base is connected with the plug box fixing pin (8.6) of the lower movable contact assembly (8) in a locking manner through the two bolts (6.2).
6. The 10 kv three-phase synchronous dropout fuse switch of claim 5, wherein: the two bolts (6.2) are respectively and correspondingly inserted into bolt holes (6.1.2) on the outer side walls of the arc hooks (6.1.1) at the left side and the right side of the base (6.1);
the box inserting fixing feet (8.6) are arranged on the inner sides of the arc-shaped hooks (6.1.1) at the left side and the right side of the base (6.1) in a penetrating manner;
the box fixing pin (8.6) comprises a left box positioning block (8.6.1) and a right box positioning block (8.6.2) which are connected with each other, a first pin (8.6.3) and a pin positioning pin (8.6.4) are respectively arranged at the outer sides of the left box positioning block (8.6.1) and the right box positioning block (8.6.2), a connecting plate (8.6.5) is respectively arranged at the inner sides of the left box positioning block (8.6.1) and the right box positioning block (8.6.2), the left box positioning block (8.6.1) and the right box positioning block (386.6.2) are connected and fixed with each other through respective connecting plates (8.6.5), the left box positioning block (8.6.1) and the right box positioning block (8.6.2) are respectively and correspondingly arranged in semicircular hook grooves (6.1.3) of the left side arc-shaped hook (6.1.1) and the right side arc-shaped hook holes (6.1.2) of the base (6.1) through respective first pin (8.6.3) and are locked and connected with the two outer side hook holes (6.1.2) of the base (6.1) through respective pin (6.1), the left and right box-inserting positioning blocks (8.6.1, 8.6.2) are also respectively and correspondingly inserted into the foot positioning pin grooves on the inner sides of the arc hooks (6.1.1) at the left and right sides of the base (6.1) through respective foot positioning pins (8.6.4);
all still be equipped with a location catching groove (6.1.4) on the inside wall that base (6.1) left and right both sides arc colluded (6.1.1), set up and be in base (6.1) left and right both sides arc colludes (6.1.1) location catching groove (6.1.4) on the inside wall and correspond respectively and insert two left and right cartridge locating piece (8.6.1, 8.6.2) looks joint matching of cartridge fixed foot (8.6).
7. The 10 kv three-phase synchronous dropout fuse switch of claim 6, wherein: the left and right plug box positioning blocks (8.6.1, 8.6.2) are respectively provided with a first through hole (8.6.6), and the plug box fixing feet (8.6) are respectively and correspondingly matched with second foot pins (8.3.1) arranged at the lower ends of the left and right outer side walls of the plug box (8.3) in a rotating way through the first through holes (8.6.6) arranged on the left and right plug box positioning blocks (8.6.1, 8.6.2);
the upper ends of the left outer side wall and the right outer side wall of the inserting box (8.3) are respectively provided with an ear boss (8.3.2), each ear boss (8.3.2) is provided with a second through hole (8.3.2 a), and the second through holes (8.3.2 a) formed in the ear bosses (8.3.2) on the left side and the right side of the inserting box (8.3) are respectively corresponding to the third through holes (11.1 a) formed in the forked legs (11.1) on the left side and the right side of the opening and closing support (11) and are connected through pins;
the middle part of the plug box (8.3) is provided with a plug box hole (8.3.3), and the plug box (8.3) is correspondingly connected with the arc-shaped plug (8.2.1) of the plug pin (8.2) in an embedded and matched manner through the plug box hole (8.3.3).
8. The 10 kv three-phase synchronous dropout fuse switch of claim 7, wherein: the plug pins (8.2) comprise two arc-shaped plugs (8.2.1), two insertion blocks (8.2.2) and a middle connecting block (8.2.3), the two arc-shaped plugs (8.2.1) are arranged on the left side and the right side of the lower end of the middle connecting block (8.2.3) in parallel, and the two insertion blocks (8.2.2) are arranged on the left side and the right side of the upper end of the middle connecting block (8.2.3) in parallel;
the two arc-shaped plugs (8.2.1) are correspondingly embedded in the plug box holes (8.3.3) of the plug box (8.3);
the two plug blocks (8.2.2) are respectively and correspondingly fixedly connected with two ear plates (8.1.1) of the fuse tube socket (8.1) through a supporting piece (8.4).
9. The 10 kv three-phase synchronous dropout fuse switch of claim 8, wherein:
each ear plate (8.1.1) is provided with a fourth through hole (8.1.1 a), a fifth through hole (8.1.1 b) and an arc-shaped hook groove (8.1.1 c);
each insert block (8.2.2) is provided with a sixth through hole (8.2.2 a) and a seventh through hole (8.2.2 b);
an eighth through hole (8.4.1) and a ninth through hole (8.4.2) are formed in each supporting piece (8.4);
the eighth through hole (8.4.1) and the ninth through hole (8.4.2) on each supporting piece (8.4) respectively correspond to the seventh through hole (8.2.2 b) on the inserting block (8.2.2) and the fifth through hole (8.1.1 b) on the ear plate (8.1.1) which are correspondingly connected with the supporting pieces, and are connected with each other through pins;
the sixth through holes (8.2.2 a) on the two inserting blocks (8.2.2) correspond to the arc-shaped hook grooves (8.1.1 c) on the two ear plates (8.1.1) and are connected through pins;
the fourth through holes (8.1.1 a) on the two ear plates (8.1.1) correspond to the tenth through hole (8.5.1) on the hasp (8.5) and are connected by a pin.
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| CN201910182664.7A CN109950109B (en) | 2019-03-12 | 2019-03-12 | 10 KV three-phase synchronous drop-out fuse switch |
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| CN201910182664.7A CN109950109B (en) | 2019-03-12 | 2019-03-12 | 10 KV three-phase synchronous drop-out fuse switch |
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| CN109950109A CN109950109A (en) | 2019-06-28 |
| CN109950109B true CN109950109B (en) | 2020-01-10 |
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| CN112097976B (en) * | 2020-08-11 | 2022-08-02 | 国家电网有限公司 | Fuse formula is experimental auxiliary device of contact clamp force for isolator |
| CN113257649B (en) * | 2021-05-20 | 2023-01-10 | 无锡职业技术学院 | Electric appliance safety equipment with improved structure |
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| CN207818509U (en) * | 2018-02-09 | 2018-09-04 | 坦帕（福建）电气有限公司 | A kind of Novel outdoor AC high-voltage drop fuse |
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| US3827010A (en) * | 1972-03-06 | 1974-07-30 | Westinghouse Electric Corp | Composite sectionalized open-type drop-out-type fusible output with series enclosed current limiting fuse |
| CN201812770U (en) * | 2009-06-30 | 2011-04-27 | 上海兆邦电力器材有限公司 | Drop-out fuse with insulating protective hood and grounding device |
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| CN109950109A (en) | 2019-06-28 |
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