A disconnector contact part anti-loosening structure

Abstract

The utility model relates to a disconnecting switch. A disconnecting switch contact head part anti-loosening structure, including first contact copper row, switch device and second contact copper row, install hinged seat on first contact copper row, hinged seat is hinged with one end of switch device, the other end of switch device is opposite fixed with second contact copper row through locking positioning mechanism, locking positioning mechanism includes the locating pin of installing on switch device and the limiting support of installing on second contact copper row, limiting support is a bending piece, the bending piece includes installation portion, and installation portion is detachably installed on second contact copper row upside through bolt, the front and back sides of installation portion are connected with the L shape structure extending upwards, and the L shape structure includes the first limiting portion connected with installation portion and the second limiting portion not connected with installation portion, the second limiting portion is used for leaning against the flanging of second contact copper row, and the limiting gap for embedding the locating pin is set up on the first limiting portion. The utility model avoids loosening.

Description

Technical Field

[0001] This utility model relates to the field of disconnector switch technology, specifically to an anti-loosening structure for the contact portion. Background Technology

[0002] As a crucial switching device in power systems, the stability of the disconnecting switch's contacts directly impacts the safe and reliable operation of the power system. In practical applications, due to long-term exposure to mechanical vibration, electrodynamic forces, and environmental factors, the contacts are prone to loosening, leading to problems such as poor contact, overheating, and even equipment failure. Utility Model Content

[0003] This utility model provides an anti-loosening structure for the contact portion of an isolating switch to solve at least one of the above-mentioned technical problems.

[0004] A structure for preventing loosening of the contact portion of a disconnecting switch includes a first contact copper busbar, a knife switch device, and a second contact copper busbar. A hinge seat is installed on the first contact copper busbar, and the hinge seat is hinged to one end of the knife switch device. The other end of the knife switch device is fixed relative to the second contact copper busbar through a locking and positioning mechanism. The locking and positioning mechanism includes a positioning pin installed on the knife switch device and a limiting bracket installed on the second contact copper busbar.

[0005] The limiting bracket is a bent component, which includes a mounting part that is detachably mounted on the upper side of the second contact copper busbar by bolts.

[0006] The front and rear sides of the mounting part are connected to an upwardly extending L-shaped structure, the L-shaped structure including a first limiting part connected to the mounting part and a second limiting part not connected to the mounting part;

[0007] The two L-shaped second limiting parts are arranged adjacently with a gap between them. The two L-shaped second limiting parts extend beyond the end of the mounting part. The second limiting parts are used to abut against the flange of the second contact copper busbar.

[0008] The first limiting part has a limiting notch for embedding the positioning pin.

[0009] This invention, through the setting of a limiting bracket and a positioning pin, facilitates the relative locking between the switch device and the second contact copper busbar, preventing loosening. It achieves lower limit positioning and prevents lateral movement. The integrated bent component structure facilitates processing and forming. The first and second contact copper busbars are positioned left and right. The limiting notch is used to restrict the lower and right limits of the positioning pin.

[0010] More preferably, the bottom of the second limiting portion is higher than the bottom of the first limiting portion;

[0011] The right end of the first limiting part extends beyond the right end of the mounting part, and an arc-shaped notch is provided at the bottom of the right end of the first limiting part, the top of the arc-shaped notch being flush with the bottom of the second limiting part.

[0012] More preferably, the switch device further includes C-shaped conductive plates arranged opposite each other with their openings facing outwards, and the two C-shaped conductive plates are connected by a first bolt, a second bolt, and a third bolt arranged from left to right;

[0013] The first bolt and the second bolt are fitted with limiting tubes on their outer sleeves, and the two sides of the limiting tubes abut against the C-shaped conductive plate;

[0014] The thread of the third bolt passes through the hinge seat, which is located between the two C-shaped conductive plates.

[0015] More preferably, the first bolt and the third bolt are fitted with a spring preload assembly, the spring preload assembly including two limiting sleeves and a spring sandwiched between the two limiting sleeves;

[0016] One of the two limiting sleeves abuts against the C-shaped conductive plate, and the other limiting sleeve abuts against the nut used to lock the bolt.

[0017] The spring can be compressed by adjusting the bolt to generate a certain preload, which is then applied to the second contact copper busbar through the switch device. During the operation of the disconnecting switch, regardless of the direction of the external force on the second contact copper busbar, the elastic preload assembly can always provide a stable preload to compensate for contact loosening caused by vibration, wear, and other factors, ensuring the reliability of the contact connection.

[0018] More preferably, the locking and positioning mechanism further includes a rotatable handle mounted on the guillotine device, the rotatable handle being connected to a latch in a transmission connection;

[0019] The guillotine device is equipped with a fourth bolt, and the rotating handle is rotatably connected to the screw of the fourth bolt;

[0020] The latch has outwardly extending pivots at both ends. The pivots are rotatably connected to the knife gate device. A torsion spring is sleeved on the pivot. One torsion spring arm abuts against the latch, and the other torsion spring arm abuts against the knife gate device.

[0021] A locking plate for locking the latch is installed below the second contact copper busbar. The locking plate is provided with an upward-curved step, which is used to abut the limiting hook of the latch.

[0022] More preferably, a magnetic lock plate made of galvanized steel plate is installed on the C-shaped conductive plate adjacent to the copper busbar of the second contact.

[0023] When the disconnector is in operation, the conductive parts will generate electromagnetic induction force. The magnetic locking plates are set on both sides of the switch device to strengthen the clamping force and further prevent loosening.

[0024] More preferably, the magnetic lock plate has, from left to right, a first through hole for passing through the first bolt, a second through hole for passing through the positioning pin, a third through hole for passing through the rotating shaft, a fourth through hole for passing through the torsion spring arm, and a fifth through hole for passing through the fourth bolt.

[0025] Beneficial effects:

[0026] This invention, through the setting of a limiting bracket and a positioning pin, facilitates the relative locking between the switch device and the second contact copper busbar, preventing loosening. The integrated, molded bending component structure facilitates processing and forming.

[0027] The coordinated action of the spring preload assembly, latch, limit bracket, positioning pin, and magnetic locking plate can effectively solve the problem of loosening of disconnecting switch contacts under the influence of factors such as electrodynamics and harsh environments. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a specific embodiment 1 of the present utility model;

[0029] Figure 2 This is a partial structural schematic diagram of a specific embodiment 1 of the present utility model;

[0030] Figure 3 This is a partial structural schematic diagram of a specific embodiment 1 of the present utility model;

[0031] Figure 4 This is a schematic diagram of the limiting bracket in specific embodiment 1 of this utility model;

[0032] Figure 5 This is a schematic diagram of the limiting bracket in specific embodiment 1 of this utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the first bolt in a specific embodiment 1 of this utility model;

[0034] Figure 7 This is a cross-sectional view of the first bolt in specific embodiment 1 of this utility model;

[0035] Figure 8 This is a schematic diagram of a specific embodiment 2 of the present utility model.

[0036] In the diagram, 1 is the first contact copper busbar, 2 is the second contact copper busbar, 3 is the knife switch device, 4 is the limit bracket, 5 is the positioning pin, 6 is the first bolt, 7 is the second bolt, 8 is the third bolt, 9 is the rotating handle, 10 is the latch, 11 is the locking plate, 12 is the torsion spring, 13 is the magnetic lock plate, 41 is the mounting part, 42 is the first limit part, 43 is the second limit part, 61 is the limit sleeve, and 62 is the spring. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figures 1 to 7 As shown in Specific Embodiment 1, a non-loosening structure for the contact portion of a disconnector switch includes a first contact copper busbar 1, a knife switch device 3, and a second contact copper busbar 2. A hinge seat is installed on the first contact copper busbar 1, and the hinge seat is hinged to one end of the knife switch device 3. The other end of the knife switch device 3 is fixed relative to the second contact copper busbar 2 through a locking and positioning mechanism. The locking and positioning mechanism includes a positioning pin 5 installed on the knife switch device 3 and a limiting bracket 4 installed on the second contact copper busbar 2. The limiting bracket 4 is a bent component, and the bent component includes a mounting part 41, which is detachable by bolts. The mounting part 41 is installed on the upper side of the second contact copper busbar 2. The front and rear sides of the mounting part 41 are connected to upwardly extending L-shaped structures. Each L-shaped structure includes a first limiting part 42 connected to the mounting part 41 and a second limiting part 43 not connected to the mounting part 41. The two L-shaped second limiting parts 43 are arranged adjacent to each other with a gap, extending beyond the end of the mounting part 41. The second limiting parts 43 are used to abut against the flange of the second contact copper busbar 2 near the first contact copper busbar 1. A limiting notch for embedding the positioning pin 5 is provided on the first limiting part 42. This invention, through the setting of the limiting bracket 4 and the positioning pin 5, facilitates the relative locking between the switch device 3 and the second contact copper busbar 2, preventing loosening. The integrated bent component structure facilitates processing and forming.

[0039] The mounting section has two through holes for bolts to pass through.

[0040] The bottom of the second limiting part 43 is higher than the bottom of the first limiting part 42; the right end of the first limiting part 42 extends beyond the right end of the mounting part 41, and an arc-shaped notch is provided at the bottom of the right end of the first limiting part 42, the top of which is flush with the bottom of the second limiting part 43. The first limiting part 42 is located in front of and behind the hole through which the bolt on the right side passes.

[0041] The limiting notch includes an inwardly concave arc-shaped notch. The upper end of the arc-shaped notch is connected to the arc-shaped convex transition part through a guide part that is inclined upward from left to right. The lower end of the arc-shaped notch is connected to the vertically arranged extension part through a horizontally arranged extension part and a cross-section that is inclined downward from right to left.

[0042] The switch device 3 also includes two C-shaped conductive plates arranged opposite each other with their openings facing outwards. The two C-shaped conductive plates are connected by a first bolt 6, a second bolt 7, and a third bolt 8 arranged from left to right. Limiting tubes are fitted around the screws of the first bolt 6 and the second bolt 7, with their sides abutting against the C-shaped conductive plates. The screw of the third bolt 8 passes through a hinge seat located between the two C-shaped conductive plates. The C-shaped conductive plates have contact portions for contacting the second contact copper busbar 2, and these contact portions are electroplated with a silver layer to increase wear resistance.

[0043] A spring preload assembly is fitted onto the first bolt 6 and the third bolt 8. The spring preload assembly includes two limiting sleeves 61 and a spring 62 sandwiched between the two limiting sleeves 61. One limiting sleeve 61 abuts against the C-shaped conductive plate, and the other limiting sleeve 61 abuts against the nut used to lock the bolt. This allows the spring to generate a certain preload force by adjusting the bolt compression. This preload force is applied to the second contact copper busbar 2 through the switch device 3. During the operation of the disconnecting switch, regardless of the direction of the external force on the second contact copper busbar 2, the spring preload assembly can always provide a stable preload force, compensating for contact loosening gaps caused by vibration, wear, etc., and ensuring the reliability of the contact connection. The two limiting sleeves are provided with opposing annular limiting extensions for limiting the ends of the spring.

[0044] The locking and positioning mechanism also includes a rotatable rotary handle 9 mounted on the knife switch device 3, which is connected to a latch 10. The knife switch device 3 is equipped with a fourth bolt, and the rotary handle 9 is rotatably connected to the screw of the fourth bolt. The latch 10 has outwardly extending pivots at both ends, which are rotatably connected to the knife switch device 3. A torsion spring 12 is fitted onto the pivot, with one arm of the torsion spring 12 abutting against the latch 10 and the other arm abutting against the knife switch device 3. A locking plate 11 for locking the latch 10 is installed below the second contact copper busbar 2. The locking plate 11 has an upwardly curved step that abuts against the limiting hook of the latch 10. The rotary handle has an actuating part that disengages the latch from the locking plate 11. When the rotary handle is released, the force of the torsion spring resets the latch.

[0045] One torsion spring arm of the torsion spring 12 is provided with a first U-shaped bend that limits the thickness of the latch 10. The other torsion spring arm of the torsion spring 12 is provided with a second U-shaped bend that limits the thickness of the C-shaped conductive plate.

[0046] See Figure 8 In specific embodiment 2, based on specific embodiment 1, a magnetic locking plate 13 made of galvanized steel plate is installed on the C-shaped conductive plate adjacent to the second contact copper busbar 2. When the disconnecting switch is working, the conductive part generates electromagnetic induction force. The magnetic locking plate, located on both sides of the switch device 3, can strengthen the clamping force and further prevent loosening. From left to right, the magnetic locking plate has a first through hole for the first bolt 6 to pass through, a second through hole for the positioning pin 5 to pass through, a third through hole for the rotating shaft to pass through, a fourth through hole for the torsion spring arm to pass through, and a fifth through hole for the fourth bolt to pass through.

[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A structure for preventing loosening of the contact portion of a disconnecting switch, comprising a first contact copper busbar, a knife switch device, and a second contact copper busbar, wherein a hinge seat is mounted on the first contact copper busbar, the hinge seat is hinged to one end of the knife switch device, and the other end of the knife switch device is fixed relative to the second contact copper busbar via a locking and positioning mechanism, characterized in that... The locking and positioning mechanism includes a positioning pin installed on the knife switch device and a limiting bracket installed on the second contact copper busbar. The limiting bracket is a bent component, which includes a mounting part that is detachably mounted on the upper side of the second contact copper busbar by bolts. The front and rear sides of the mounting part are connected to an upwardly extending L-shaped structure, the L-shaped structure including a first limiting part connected to the mounting part and a second limiting part not connected to the mounting part; The two L-shaped second limiting parts are arranged adjacently with a gap between them. The two L-shaped second limiting parts extend beyond the end of the mounting part. The second limiting parts are used to abut against the flange of the second contact copper busbar. The first limiting part has a limiting notch for embedding the positioning pin.

2. The anti-loosening structure for the contact portion of a disconnecting switch according to claim 1, characterized in that: The bottom of the second limiting part is higher than the bottom of the first limiting part; The right end of the first limiting part extends beyond the right end of the mounting part, and an arc-shaped notch is provided at the bottom of the right end of the first limiting part, the top of the arc-shaped notch being flush with the bottom of the second limiting part.

3. The anti-loosening structure for the contact portion of a disconnecting switch according to claim 1, characterized in that: The switch device also includes C-shaped conductive plates arranged opposite each other with their openings facing outwards. The two C-shaped conductive plates are connected by a first bolt, a second bolt, and a third bolt arranged from left to right. The first bolt and the second bolt are fitted with limiting tubes on their outer sleeves, and the two sides of the limiting tubes abut against the C-shaped conductive plate; The thread of the third bolt passes through the hinge seat, which is located between the two C-shaped conductive plates.

4. The anti-loosening structure for the contact portion of a disconnecting switch according to claim 3, characterized in that: The first bolt and the third bolt are fitted with spring preload assemblies, the spring preload assemblies including two limiting sleeves and a spring sandwiched between the two limiting sleeves; One of the two limiting sleeves abuts against the C-shaped conductive plate, and the other limiting sleeve abuts against the nut used to lock the bolt.

5. The anti-loosening structure for the contact portion of a disconnecting switch according to claim 3, characterized in that: The locking and positioning mechanism further includes a rotatable handle mounted on the knife gate device, the rotatable handle being connected to a locking mechanism. The guillotine device is equipped with a fourth bolt, and the rotating handle is rotatably connected to the screw of the fourth bolt; The latch has outwardly extending pivots at both ends. The pivots are rotatably connected to the knife gate device. A torsion spring is sleeved on the pivot. One torsion spring arm abuts against the latch, and the other torsion spring arm abuts against the knife gate device. A locking plate for locking the latch is installed below the second contact copper busbar. The locking plate is provided with an upward-curved step, which is used to abut the limiting hook of the latch.

6. The anti-loosening structure for the contact portion of a disconnecting switch according to claim 5, characterized in that: A magnetic lock plate made of galvanized steel is installed on the C-shaped conductive plate adjacent to the copper busbar of the second contact.

7. The anti-loosening structure for the contact portion of a disconnecting switch according to claim 6, characterized in that: The magnetic lock plate has, from left to right, a first through hole for the first bolt to pass through, a second through hole for the positioning pin to pass through, a third through hole for the rotating shaft to pass through, a fourth through hole for the torsion spring arm to pass through, and a fifth through hole for the fourth bolt to pass through.

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