Special phase checking device for static contact of high-voltage electric appliance cabinet

Abstract

The utility model provides a special phase checking device for a static contact of a high-voltage electrical cabinet, which relates to the field of anti-electric shock devices for maintenance and phase checking operation of the high-voltage electrical cabinet and comprises a main body frame, a telescopic frame, a transmission part and a supporting part, the body frame comprises a front frame and a rear frame, a lead screw guide groove is welded between the two frames, the telescopic frame component comprises a telescopic frame, and a baffle opening and closing push plate is arranged on the rear side of the upper portion of the telescopic frame. The transmission part comprises a lead screw, the lead screw is arranged in the lead screw guide groove, a lead screw guide seat is installed on the tail portion of the lead screw, a lead screw positioning ring is fixedly installed at the front end of the lead screw, and a lead screw nut is coaxially fixed to the inner side of a center hole of the front frame so that the lead screw can stretch out and draw back in the axial direction of the lead screw nut. By means of the device, an operator can rapidly open and close the high-voltage cabinet static contact baffle outside a safe distance, it is ensured that the operator is always out of the dangerous range of a high-voltage electric field when opening and closing the external baffle of the static contact, and the personal safety of the operator and the equipment safety are ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of an anti-electric shock device for the maintenance and phase verification of high-voltage electrical cabinets, and in particular to a special device for phase verification of the stationary contacts of high-voltage electrical cabinets. Background Technology

[0002] After overhauling a high-voltage electrical cabinet or replacing related cables, a phase sequence check of the stationary contacts is required to ensure the correct phase sequence of the circuit. During phase check, the external baffle of the stationary contact must be opened. The opening and closing of the baffle is controlled by a linkage mechanism. Operators must wear high-voltage insulating gloves and push the linkage mechanism to open the external baffle, then securely fasten the linkage mechanism with plastic cable ties. Manually pushing the baffle linkage mechanism poses a significant safety hazard if personnel are too close to the energized stationary contact or if their limbs enter the electric field. This can easily lead to high-voltage electric shock and injury.

[0003] To avoid such accidents, this application designs a special device for phase comparison of stationary contacts in high-voltage electrical cabinets, based on the principle of inherent safety, to ensure that operators are always at a safe distance when opening and closing the stationary contact baffle. Utility Model Content

[0004] This utility model provides a special device for phase comparison of stationary contacts in high-voltage electrical cabinets, ensuring that when operators open and close the external baffle of the stationary contacts, they are always outside the danger zone of the high-voltage electric field, thus ensuring the personal safety of operators and the safety of equipment.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A special device for phase comparison of stationary contacts in a high-voltage electrical cabinet includes a main frame component, a telescopic frame component, a transmission component, and a support component. The main frame includes a front frame and a rear frame, with a lead screw guide groove welded between the two frames. The telescopic frame component is inserted on both sides of the main frame component and includes a telescopic frame with a baffle opening and closing push plate on the rear side above the telescopic frame. The transmission component includes a lead screw, a lead screw guide seat, a lead screw nut, and a lead screw positioning ring. The lead screw is set in the lead screw guide groove, with a lead screw guide seat installed at its tail. The lead screw positioning ring is fixedly installed at the front end of the lead screw, and the lead screw nut is coaxially fixed inside the center hole of the front frame, allowing the lead screw to extend and retract axially along the lead screw nut.

[0007] Furthermore, the support component includes a support arm and a support arm telescopic rod, with two support arm telescopic rods respectively inserted on both sides of the support arm, and support arm positioning pins respectively provided on the outer side of the support arm telescopic arm.

[0008] Furthermore, the support arm is a hollow structure, and the inner diameter of the support arm is larger than the outer diameter of the support arm telescopic rod. The two support arm telescopic rods are inserted from both sides of the support arm and fixed by telescopic rod fixing bolts.

[0009] Furthermore, both the front and rear frames are hollow structures, and the lower center of the front frame has an opening with a diameter larger than the outer diameter of the lead screw, allowing the lead screw to pass through and be installed in the lead screw guide groove; the telescopic frame is a hollow U-shaped structure, and its outer diameter is smaller than the inner diameter of the front and rear frames. The two telescopic frames are inserted into the tube holes on both sides of the front and rear frames respectively and fixed to the main frame components by fixing bolts.

[0010] Furthermore, the lead screw nut is coaxially fixed inside the center hole of the front frame of the trolley; the lead screw guide seat is installed at the tail of the lead screw and is fitted with the lead screw guide groove to ensure that the lead screw extends and retracts axially; the lead screw positioning ring is fixedly installed at the front end of the lead screw and fixedly set in the opening inside the support arm to ensure that the lead screw only rotates in a circular motion relative to the fixed support arm of the trolley when it rotates, and does not move axially.

[0011] Furthermore, the support arm has an opening at its center, the diameter of which is larger than the outer diameter of the lead screw, and the lead screw passes through the opening and is connected to the lead screw handle.

[0012] Furthermore, the positioning pins of the support arms on both sides are inserted into the positioning holes on both sides of the high-voltage cabinet door and rotated to fix them.

[0013] Furthermore, wheels are provided at the upper and lower ends of the telescopic frame.

[0014] The beneficial effects of this utility model are as follows:

[0015] This device allows operators to quickly open and close the stationary contact baffle of the high-voltage switchgear from a safe distance, ensuring that operators are always outside the danger zone of the high-voltage electric field when opening and closing the external baffle of the stationary contact, thus ensuring the personal safety of operators and the safety of equipment. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is the left view of the structure of this utility model.

[0019] Figure 3 This is a cross-sectional view of the structure of this utility model.

[0020] Figure 4 This is a top view of the present invention.

[0021] Explanation of icon numbers:

[0022] 1. Rear frame; 2. Front frame; 3. Lead screw guide groove; 4. Telescopic frame fixing bolt; 5. Lead screw; 6. Lead screw guide seat; 7. Lead screw nut; 8. Lead screw positioning ring; 9. Lead screw handle; 10. Telescopic frame; 11. Wheel; 12. Baffle opening and closing push plate; 13. Support arm; 14. Support arm telescopic rod; 15. Support arm positioning pin; 16. Telescopic frame fixing bolt. Detailed Implementation

[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0027] This utility model provides a technical solution: a special device for phase comparison of static contacts in high-voltage electrical cabinets, such as... Figure 1-4 As shown, this device mainly consists of four components: the main frame component of the trolley (components 1, 2, 3, and 4); the telescopic frame component of the trolley (components 10, 11, and 12); the transmission component of the trolley (components 5, 6, 7, 8, and 9); and the support component of the trolley (components 13, 14, 15, and 16).

[0028] The main frame components of the car: The car frame is made of hollow aluminum alloy square tube. The two ends of the lead screw guide groove 3 are welded and fixed to the bottom surface of the midpoint of the rear frame 1 and the front frame 2 of the car in an "I" shape. The center of the lower frame of the front frame 2 of the car has an opening with a diameter about 1mm larger than the lead screw 5 so that the lead screw 5 can be inserted and installed in the lead screw guide groove 3.

[0029] The trolley telescopic frame components: The trolley telescopic frame 10 is made of hollow aluminum alloy square tubes in a "U" shape, with one on each side. The outer diameter of the square tube is 1mm smaller than the inner diameter of the trolley frame square tube. It is inserted into the tube holes on the left and right sides of the trolley front frame 2 and rear frame 1 respectively. Its telescopic length is adjusted according to the installation track spacing of the moving contacts in the electrical cabinet on site. The trolley telescopic frame fixing bolts 4 are used to fix the trolley telescopic frame 10 after the telescopic length is determined. The baffle opening and closing push plate 12 is welded and fixed to the upper rear side of the trolley telescopic frame 10. It is used to push the push head of the static contact baffle connecting rod opening and closing mechanism when the trolley moves axially, and control its opening and closing.

[0030] The trolley transmission components consist of a lead screw 5, a lead screw guide seat 6, a lead screw nut 7, a lead screw positioning ring 8, and a lead screw handle 9. The lead screw nut 7 is coaxially fixed inside the center hole of the trolley front frame 2. The lead screw 5 is driven to rotate by the lead screw handle 9 and extends and retracts axially along the lead screw nut 7. The lead screw guide seat 6 is installed at the tail of the lead screw 5 and is fitted into the lead screw guide groove 3 to ensure that the lead screw 5 extends and retracts axially. The lead screw positioning ring 8 is fixedly installed at the front end of the lead screw 5 (inner and outer parts of the trolley fixed support arm 13) to ensure that the lead screw 5 only rotates in a circular motion relative to the trolley fixed support arm when rotating, without axial movement.

[0031] The trolley support components are made of hollow aluminum alloy square tubing. The outer diameter of the support arm telescopic rod 14 is 1mm smaller than the inner diameter of the support arm 13 square tubing. There are one on each side, inserted into the tube holes on the left and right sides of the support arm 13 respectively. The telescopic length is adjusted according to the spacing of the moving contact mounting holes in the electrical cabinet. The telescopic rod fixing bolts 16 are used to determine the telescopic length of the support arm telescopic rod 14 and to tighten the support arm positioning pins 15 after inserting them into the positioning holes on both sides of the high-voltage cabinet door. The support arm 13 has a center hole with a diameter approximately 1mm larger than the outer diameter of the lead screw 5, so that the lead screw 5 can be inserted and installed in the lead screw guide groove 3.

[0032] The method of using this device includes:

[0033] (1) Assemble the device.

[0034] (2) Place the device as a whole in the high-voltage electrical cabinet to be operated, adjust the trolley telescopic frame 10 so that the wheels on both sides are embedded in the original contact installation track inside the cabinet, and then tighten the trolley fixing bolts 4.

[0035] (3) Push the device into the cabinet as a whole, so that the support arm telescopic rod 14 and the support arm 13 kit are parallel to the positioning holes on both sides of the original cabinet door. Then adjust the support arm telescopic rod 14, insert the support arm positioning pin 15 into the positioning holes on both sides, and then tighten the telescopic rod fixing bolt 16.

[0036] (4) Rotate the screw handle 9 clockwise. During the relative rotation of the screw 5 and the screw nut 7 fixed to the front frame 2 of the trolley, the main frame of the trolley moves into the cabinet as a whole until the baffle opening and closing push plate 12 pushes the push head of the stationary contact baffle connecting rod opening and closing mechanism to open its stationary contact baffle.

[0037] The economic and social benefits generated by this device are:

[0038] (1) Economic benefits

[0039] This device allows operators to quickly open and close the stationary contact baffle of the high-voltage switchgear from a safe distance, ensuring that operators are always outside the danger zone of the high-voltage electric field when opening and closing the external baffle of the stationary contact, thus ensuring the personal safety of operators and the safety of equipment.

[0040] Safety and economic benefits

[0041] E = (B1 - B2) + k QC

[0042] E: Safety and economic benefits; B1: Pre-operational losses (before safety measures) of 1 million yuan (including medical expenses, work-related injuries and occupational diseases, property damage from accidents, and economic losses from work stoppages during hazardous periods); B2: Post-operational losses (after safety measures); k: Safety production contribution rate of 1.5%-5%; Q: Total output value of 80 million yuan; C: Safety investment of 10,000 yuan.

[0043] The safety and economic benefits of this device are E = (100 - 0) + 8000 × 1.5% - 1 = 2.19 million yuan.

[0044] (2) Social benefits

[0045] Practice has proven that the application of this locking device effectively prevents high-voltage electric shock accidents and injuries caused by personnel getting too close to the live static contact or their limbs entering the electric field range when manually pushing the baffle linkage mechanism. It provides a safer guarantee for workers.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art is within the protection scope of the present utility model.

Claims

1. A high-voltage electrical cabinet static contact core phase special device, characterized in that, This includes the main frame components, telescopic frame components, transmission components, and support components; The main frame includes a front frame (2) and a rear frame (1), with a lead screw guide groove (3) welded between the two frames; The telescopic frame component is inserted on both sides of the main frame component, including the telescopic frame (10), and a baffle opening and closing push plate (12) is provided on the rear side above the telescopic frame (10); The transmission components include a lead screw (5), a lead screw guide seat (6), a lead screw nut (7), and a lead screw positioning ring (8). The lead screw (5) is set in the lead screw guide groove (3), and the lead screw guide seat (6) is installed at its tail. The lead screw positioning ring (8) is fixedly installed at the front end of the lead screw (5). The lead screw nut (7) is coaxially fixed inside the center hole of the front frame (2) so that the lead screw (5) can extend and retract along the axial direction of the lead screw nut (7).

2. The high voltage electrical cabinet static contact phase checking special device according to claim 1, characterized in that, The support component includes a support arm (13) and a support arm telescopic rod (14). The two support arm telescopic rods (14) are respectively inserted on both sides of the support arm (13), and support arm positioning pins (15) are respectively provided on the outer side of the support arm telescopic rods (14).

3. The high voltage electrical cabinet static contact phase checking special device according to claim 2, characterized in that, The support arm (13) is a hollow structure, and the inner diameter of the support arm (13) is larger than the outer diameter of the support arm telescopic rod (14). The two support arm telescopic rods (14) are inserted from both sides of the support arm (13) and fixed by the telescopic rod fixing bolts (16).

4. The high voltage electrical cabinet static contact phase checking special device according to claim 1, characterized in that, Both the front frame (2) and the rear frame (1) are hollow structures, and the lower center of the front frame (2) is provided with an opening with a diameter larger than the outer diameter of the lead screw (5), so that the lead screw (5) can be inserted through the opening and installed in the lead screw guide groove (3). The telescopic frame (10) is a hollow U-shaped structure, and its outer diameter is smaller than the inner diameter of the front frame (2) and the rear frame (1). The two telescopic frames (10) are inserted into the tube holes on both sides of the front frame (2) and the rear frame (1) and fixed to the main frame components by fixing bolts (4).

5. The high voltage electrical cabinet static contact phase checking special device according to claim 2, characterized in that, The lead screw nut (7) is coaxially fixed inside the center hole of the front frame (2) of the trolley; the lead screw guide seat (6) is installed at the tail of the lead screw (5) and is fitted with the lead screw guide groove (3) to ensure that the lead screw (5) extends and retracts axially; the lead screw positioning ring (8) is fixedly installed at the front end of the lead screw (5) and fixedly set in the opening inside the support arm (13) to ensure that the lead screw (5) only rotates in a circular motion relative to the fixed support arm (13) of the trolley when it rotates, and does not move axially.

6. The high voltage electrical cabinet stationary contact phase checking device according to claim 5, characterized in that, The support arm (13) has an opening at its center, the diameter of which is larger than the outer diameter of the lead screw (5). The lead screw (5) passes through the opening and is connected to the lead screw handle (9).

7. The high voltage electrical cabinet static contact phase checking special device according to claim 2, characterized in that, The positioning pins (15) of the support arms on both sides are inserted into the positioning holes on both sides of the high voltage cabinet door and rotated to fix them.

8. The high voltage electrical cabinet stationary contact phase checking device according to claim 1, characterized in that, The telescopic frame (10) is equipped with wheels (11) at its upper and lower ends respectively.

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