阅读说明：本技术 一种跌落式熔断器新型接线装置 (Novel wiring device of drop-out fuse ) 是由 席昌文 孔祥伦 陈启升 刘江 李亮 宋红飞 刘毅 周东麟 于 2020-11-20 设计创作，主要内容包括：本发明公开了一种跌落式熔断器新型接线装置,属于电力线路变压器辅助装置技术领域；它包括用于和跌落式熔断器的上、下接线端子相配合的连板；在连板的一个端侧上开有设置有支台；连板与支台均采用导电材料制成；在支台上两个相邻端面上分别开有沉头接线孔和导向固定孔；导向固定孔的一端与沉头接线孔相通；引流线可拆卸地插入沉头接线孔内部进行设置,固定卡件通过导向固定孔将引流线与支台进行固定；本发明有效地解决了在采用当前的压板式接线时设备易收到外部环境影响,且由于老化锈蚀容易发生松动或脱落,同时在配变负荷过重或解除不良时发热甚至烧坏的问题。(The invention discloses a novel wiring device of a drop-out fuse, belonging to the technical field of auxiliary devices of power line transformers; the fuse protector comprises a connecting plate which is matched with an upper wiring terminal and a lower wiring terminal of the drop-out fuse protector; a branch table is arranged on one end side of the connecting plate; the connecting plate and the supporting platform are both made of conductive materials; two adjacent end surfaces on the supporting platform are respectively provided with a countersunk head wiring hole and a guiding fixing hole; one end of the guide fixing hole is communicated with the countersunk head wiring hole; the drainage wire is detachably inserted into the countersunk head wiring hole for arrangement, and the drainage wire and the support are fixed by the fixing clamping piece through the guide fixing hole; the invention effectively solves the problems that the equipment is easily influenced by external environment when the current pressing plate type wiring is adopted, and the equipment is easy to loosen or fall off due to aging and corrosion, and simultaneously generates heat and even burns out when the distribution transformer has heavy load or is not good.)

1. A novel wiring device of a drop-out fuse comprises a connecting plate (1) which is matched with an upper wiring terminal and a lower wiring terminal of the drop-out fuse; a supporting platform (2) is arranged on one end side of the connecting plate (1); the connecting plate (1) and the supporting platform (2) are both made of conductive materials; the method is characterized in that: two adjacent end surfaces on the supporting platform (2) are respectively provided with a countersunk head wiring hole (2A) and a guiding fixing hole (2B); one end of the guide fixing hole (2B) is communicated with the countersunk head wiring hole (2A); drainage wire detachably inserts the inside setting of countersunk head wiring hole (2A), and fixed fastener (3) are fixed drainage wire and a platform (2) through direction fixed orifices (2B).

2. The novel wiring device of a drop-out fuse according to claim 1, characterized in that: the direction fixed orifices (2B) are that a set of figure is not less than two screw hole structures, and the middle part axis direction of direction fixed orifices (2B) edge countersunk head wiring hole (2A) extends the setting, and corresponding fixed fastener (3) are with direction fixed orifices (2B) matched with moment screw.

3. The novel wiring device of a drop-out fuse according to claim 2, characterized in that: the internal threads of two adjacent guide fixing holes (2B) in the same group have opposite rotating directions; the corresponding external thread turning directions of the fixed clamping pieces (3) are also opposite.

4. A novel wiring device for a drop-out fuse according to claim 2 or 3, wherein: the end head part of the fixed clamping piece (3) extending out of the guide fixing hole (2B) is provided with a pin hole (3A) along the same straight line; the positioning pin (5) is disposed through the pin hole (3A).

5. The novel wiring device of a drop-out fuse according to claim 1, characterized in that: the wire fixing piece (4) is of a strip-shaped structure; the length of direction stationary blade (4) and the degree of depth phase-match of countersunk head wiring hole (2A), and direction stationary blade (4) detachably inserts and sets up in countersunk head wiring hole (2A).

6. The novel wiring device of a drop-out fuse according to claim 5, characterized in that: the lower bottom of the guide fixing piece (4) is of a cambered surface structure; the section of the countersunk head wiring hole (2A) is in a structure that the upper end is rectangular and the lower end is semicircular.

7. The novel wiring device of a drop-out fuse according to claim 1, characterized in that: the upper top of the guide fixing piece (4) is also provided with a countersunk positioning hole (4A) the size of which corresponds to the size of the bottom of the fixing clamping piece (3).

8. The novel wiring device of a drop-out fuse according to claim 1, characterized in that: two groups of countersunk head wiring holes (2A) and a guide fixing hole (2B) are formed in the supporting platform (2), and the two groups of countersunk head wiring holes (2A) are arranged in parallel in the axial direction.

9. The novel wiring device of a drop-out fuse according to claim 1, characterized in that: the connecting plate (1) and the supporting platform (2) are of cuboid step structures which are integrally formed and processed by using the same material, and the edge positions of the connecting plate (1) and the supporting platform (2) are both provided with fillets.

Technical Field

The invention relates to the technical field of auxiliary devices of power line transformers, in particular to a novel wiring device of a drop-out fuse.

Background

The drop-out fuse is a short-circuit protection switch most commonly used for 10kV distribution line branch lines and distribution transformers, has the characteristics of economy, convenient operation, strong outdoor environment adaptability and the like, is widely applied to middle and small-sized cities and rural distribution systems, and is used for protection and equipment switching and switching operation on the primary side of the 10kV distribution line and the distribution transformers. The device is arranged on the high-voltage side of a distribution transformer or a distribution line branch line and is used for short circuit and overload protection of the transformer and the line and load distribution and load combination current. At present, drop-out fuses adopted by power distribution networks in the regions are mainly of types RW11 and RW12, the upper lead connectors and the lower lead connectors of the drop-out fuses are mostly of pressing plates, and the pressing plates are made of zinc-plated or silver-plated metal parts and are fastened by zinc-plated bolts. In the practical operation process in recent years, the failure rate of the connection part of the upper and lower lead joints and the lead is high, and the following problems exist:

(1) when adopting clamp plate formula mode of connection, because the terminal and clamp plate and drainage wire's contact surface is little, and the clamp plate can flatten the wire and press the strand that loosens even, after the operating duration is long, clamp plate and bolt corrosion easily become flexible with ageing, cause behind the contact failure very easily to cause the striking sparks even blow off the drainage wire.

(2) The metal pressing plate is formed by stamping thin sheet metal, and is easy to break after being corroded along with operation, so that the drainage wire falls off.

(3) The pressing plate type wiring mode easily causes the heating and even burning of the connection part under the condition of overweight distribution and transformation load.

(4) The clamp plate type wiring is not firm enough and is easily influenced by external force, and the upper and lower lead joint parts are easily loosened in the construction process or under the external force of strong wind, ticket hanging foreign matters and the like, so that faults are caused.

In summary, it is necessary to change the pressing plate type manner adopted by the upper and lower lead connectors of the conventional drop-out fuse, and develop a drop-out fuse wiring device according to our own working requirements and practical technical conditions, which is used as a transition connection hardware fitting for connecting the terminals and the wires of the drop-out fuse, so as to improve the connection reliability and reduce the failure rate.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a novel termination of drop out fuse to solve when adopting current clamp plate formula wiring equipment and easily receive external environment influence, and because ageing corrosion takes place to become flexible or drop easily, generate heat or even burn out the problem when joining in marriage the transformer overload or remove badly simultaneously.

In order to solve the problems, the invention provides the following technical scheme:

a novel wiring device of a drop-out fuse comprises a connecting plate which is matched with an upper wiring terminal and a lower wiring terminal of the drop-out fuse; a branch table is arranged on one end side of the connecting plate; the connecting plate and the supporting platform are both made of conductive materials; two adjacent end surfaces on the supporting platform are respectively provided with a countersunk head wiring hole and a guiding fixing hole; one end of the guide fixing hole is communicated with the countersunk head wiring hole; drainage wire detachably inserts the inside setting of countersunk head wiring hole, and fixed fastener is fixed drainage wire and a platform through the direction fixed orifices.

Preferably, the guide fixing holes are in a group of threaded hole structures with the number not less than two, the guide fixing holes extend along the axis direction of the middle part of the countersunk head wiring hole, and the corresponding fixing clamping pieces are torque screws matched with the guide fixing holes.

Furthermore, the screwing directions of the internal threads of two adjacent guide fixing holes in the same group are opposite; the external thread turning directions of the corresponding fixed clamping pieces are also opposite.

Furthermore, pin holes are formed in the end head parts of the fixed clamping pieces extending out of the guide fixing holes along the same straight line; the positioning pin is disposed through the pin hole.

Preferably, the wire fixing piece is of a strip-shaped structure; the length of direction stationary blade and the degree of depth phase-match of countersunk head wiring hole, and direction stationary blade detachably inserts and sets up in the countersunk head wiring hole.

Furthermore, the lower bottom of the guide fixing piece is of an arc surface structure; the section of the countersunk head wiring hole is in a structure with a rectangular upper end and a semicircular lower end.

Furthermore, a countersunk positioning hole with the size corresponding to the size of the bottom of the fixed clamping piece is formed in the upper top of the guide fixing piece.

Preferably, the supporting platform is provided with two groups of countersunk head wiring holes and guiding fixing holes, and the two groups of countersunk head wiring holes are arranged in parallel in the axial direction.

Preferably, even board and a platform are the cuboid stair structure of using the same material integrated into one piece processing, and even the border position of board and a platform all has the fillet.

The invention has the beneficial effects that:

aiming at the technical problems existing in the connection of the current transformer drainage wire, the novel wiring device of the drop-out fuse is manufactured by using the conductive material, the traditional upper pile head and lower pile head pressing plate type wiring structure of the drop-out fuse is replaced, the connecting plates are respectively installed on the wiring terminals of the drop-out fuse by using stainless steel bolts, meanwhile, the high-voltage drainage wire can be connected into the wiring holes of the wiring device, and the lead is pressed by using a torque screw to fix the drainage wire, so that the problem of high wiring failure rate of the traditional drop-out fuse is solved, the safety and stability of equipment operation are improved, and the power supply reliability of a power grid is improved; meanwhile, the number of times of fault first-aid repair operation of the drop-out fuse is reduced, the operation risk is reduced, and the safety benefit is improved; meanwhile, the system also has the advantages of reducing the failure rate, reducing the failure power-off time, reducing the electric quantity loss, realizing multiple power supply quantities and improving the economic benefit. The specific beneficial effects are embodied in the following aspects from the structure:

1. the connection part of the device and the lead adopts the circular hole wiring, the contact surface with the lead is maximized, and the phenomena of poor contact, heating and the like are not easy to occur;

2. the lead is fastened by adopting the double-torque bolt, so that the stability is improved, the lead is not easy to fall off or break, and the influence of external force is small;

3. double wiring holes are adopted according to the double-hole model, and the second wiring hole can be used as a standby wiring hole for carrying out lead replacement work and can also be used for connecting a lightning arrester lead;

4. the installation cost is low, the whole drop-out fuse is not required to be replaced, and the wiring device can be installed only by detaching the wiring pressing plate and the original bolt of the drop-out fuse;

5. is safe and reliable. Installation or change work is similar with the change equipment fastener, can adopt live working mode to the operation method of now mastering changes, need not develop new operation method, also can not increase new operation risk.

Drawings

FIG. 1 is a schematic view of the construction of the device of the present invention with a single guide fixing hole in the present embodiment;

FIG. 2 is a schematic view of the structure of the device of the present invention with two guiding and fixing holes;

FIG. 3 is a three-dimensional view of the attachment plate and the abutment of the device of FIG. 1;

FIG. 4 is a schematic view of the wire fixing piece in the present embodiment;

FIG. 5 is a three-dimensional view of the attachment plate and the abutment of the device of FIG. 1;

fig. 6 is a schematic structural view of the fixing clip of the present embodiment;

FIG. 7 is a schematic view of the embodiment in which the drainage wire is fixed;

description of reference numerals: 1. the connector comprises a connecting plate, 2, a support, 2A, a countersunk head wiring hole, a guide fixing hole, 3, a fixing clamping piece, 3A, a pin hole, 4, a lead fixing piece, 4A, a countersunk head positioning hole, 5 and a positioning pin.

Detailed Description

The invention will be further described with reference to the following drawings and specific embodiments:

example 1:

referring to fig. 1 to 6, the present embodiment provides a novel wiring device for a drop-out fuse, which includes a connecting plate 1 for mating with upper and lower wiring terminals of the drop-out fuse; a supporting platform 2 is arranged on one end side of the connecting plate 1; the connecting plate 1 and the supporting platform 2 are both made of conductive materials; two adjacent end surfaces on the supporting platform 2 are respectively provided with a countersunk head wiring hole 2A and a guiding fixing hole 2B; one end of the guide fixing hole 2B is communicated with the countersunk head wiring hole 2A; drainage wire detachably inserts the inside setting of countersunk head wiring hole 2A, and fixed fastener 3 is fixed drainage wire and a platform 2 through direction fixed orifices 2B. The connecting plate 1 and the supporting platform 2 are of cuboid step structures which are formed by aluminum alloy materials through integrated forming, and the edge positions of the connecting plate 1 and the supporting platform 2 are both provided with fillets. The connecting plate 1 in this embodiment is provided with a waist-round hole, and is connected with the drop-out fuse in a flat plate manner through a stainless steel bolt matching with the waist-round hole. The size of the connecting plate 1 is 33mm 24mm 10 mm; the axis of the connecting plate 1 coincides with the axis of the support platform 2, the size of the support platform 2 is 54mm x 24mm x 30mm, and the hole depth of the countersunk head wiring hole 2A is 48 mm; two guide fixing holes 2B are provided at positions 16mm and 38mm from the end side of the abutment 2, respectively.

The direction fixed orifices 2B is a set of two M12 screw hole structures, and the direction fixed orifices 2B extends the setting along countersunk head wiring hole 2A's middle part axis direction, and the fixed fastener 3 that corresponds is the moment screw with direction fixed orifices 2B matched with. The threaded hole is used for matching with a conventional tool of an electrician, and under a specific environment, different matching modes can be adopted to meet the fixation between the guide fixing hole 2B and the fixing clamping piece 3 according to actual conditions.

The internal threads of two adjacent guide fixing holes 2B in the same group have opposite rotating directions; the corresponding external thread direction of the fixed clamping piece 3 is also opposite. The two guide fixing holes 2B with opposite screwing directions can prevent the other one from continuously keeping the fixing function under the state that one torque screw is loosened.

A pin hole 3A is formed in the end part of the fixed clamping piece 3 extending out of the guide fixing hole 2B along the same straight line; the positioning pin 5 is disposed through the pin hole 3A. Referring to fig. 7, the use of the cooperation of the pin hole 3A and the positioning pin 5 can further improve the installation reliability of the guide fixing hole 2B and the fixing clip 3, preventing the fixing clip 3 from slipping off.

The lead fixing piece 4 is of a strip-shaped structure; the length of guide fixing piece 4 and the degree of depth phase-match of countersunk head wiring hole 2A, guide fixing piece 4 detachably inserts and sets up in countersunk head wiring hole 2A.

The lower bottom of the guide fixing piece 4 is of a cambered surface structure; the cross-sectional shape of the countersunk head wiring hole 2A is a structure with an upper end of a rectangle of 9mm x 6mm and a lower end of a semicircular arc of R =6 mm.

The upper top of the guide fixing piece 4 is also provided with a countersunk positioning hole 4A with the size corresponding to the size of the bottom of the fixing clamping piece 3. The countersunk head positioning hole 4A can provide a larger contact surface with the guide fixing piece 4 for the lower bottom of the fixing clamp piece 3 to increase friction, and can also play a role in guiding.

Example 2:

the rest of the structure in embodiment 2 is the same as that in embodiment 1, and is not described again here. Referring to fig. 2, in the present embodiment, two sets of countersunk holes 2A and guide fixing holes 2B are formed in the support 2, and the two sets of countersunk holes 2A are arranged in parallel in the axial direction. The arrangement of the two groups of countersunk head wiring holes 2A and the guide fixing holes 2B forms wiring structures which are backup to each other, so that the replacement of the lead wire can be realized, the lead wire can also be used for connecting the lead wire of the lightning arrester, and the safety of the device is improved.