Grounding switch static tool bit positioning tool

Abstract

The utility model relates to the field of grounding switch parts, and provides a grounding switch static tool bit positioning tool which comprises a positioning plate, the positioning plate is provided with slots which are consistent with static contacts in width and are in one-to-one correspondence with three-phase static contacts, and the positioning plate is further provided with a supporting vertical plate. The supporting vertical plate is further connected with a bottom plate used for placing the whole positioning tool on a grounding switch base, and the bottom plate is further provided with an arc-shaped groove matched with the bottom contour of a sensor. After the static tool bit is installed at the top of the sensor through the bolt, the bolt is not screwed tightly, the positioning tool is placed on the grounding switch base, the arc-shaped groove is attached to the bottom outline of the sensor to achieve positioning of the tool, then the static contact is inserted into the positioning insertion groove to achieve positioning of the three-phase static contact, at the moment, the bolt is screwed tightly, and then the three-phase static contact is positioned. Therefore, the positioning precision of the static contact on the three-phase static tool bit can be ensured, and the problem that the positioning precision of the static contact is poor when the grounding switch is assembled in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of grounding switch components, and in particular to a grounding switch stationary knife head positioning fixture. Background Technology

[0002] A grounding switch is a mechanical switching device used to intentionally ground a circuit to ensure the safety of maintenance personnel during power outages. Existing grounding switches include... Figure 1 , Figure 2 As shown, the device includes a grounding switch base 4, a three-phase sensor 3 mounted on the grounding switch base 4, and a three-phase stationary blade head 2 mounted on the top of the sensor 3. The stationary blade head 2 includes a stationary blade head body 23 and a contact seat 24. The stationary contact 22 is mounted on the contact seat 24. An inclined connecting arm 25 is also provided between the contact seat 24 and the stationary blade head body 23. The top of the sensor 3 is also provided with two fixing threaded holes. The stationary blade head body 23 is provided with mounting holes 21 corresponding to the fixing threaded holes of the sensor 3. The stationary blade head 2 is mounted on the sensor 3 as a whole by bolts.

[0003] In the assembly process of existing grounding switch products, it is difficult to ensure the installation angle of the stationary contact when installing the stationary knife head 2. Due to the error between the mounting hole 21 and the outer diameter of the bolt, the stationary knife head 2 may be offset in the direction perpendicular to the axis of the three-phase sensor arrangement. There may also be an angular deviation between the closing position of the stationary knife head 2 and the switch knife along the direction of the three-phase sensor arrangement. The angular deviation will cause friction and collision between the stationary contact 22 on the stationary knife head 2 and the moving contact of the switch knife when closing, which will lead to overheating, wear or even contact damage of the stationary contact 22 and the switch knife, causing power system failure. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning fixture for the stationary blade of a grounding switch, so as to solve the problem that the stationary blade of the grounding switch will be offset in the arrangement direction of the three-phase sensors during assembly, resulting in poor installation and positioning accuracy.

[0005] To achieve the above objectives, this utility model provides a positioning fixture for the stationary blade of a grounding switch, including a positioning plate. The positioning plate is provided with positioning slots that are consistent with the width of the stationary contact and correspond one-to-one with the three-phase stationary contacts. The positioning plate is also provided with a support plate. The bottom of the support plate is provided with a base plate. The base plate has a bottom support surface that fits against the top surface of the grounding switch base. The base plate is provided with at least two arc-shaped grooves that are adapted to the bottom contour of the sensor.

[0006] Furthermore, three arc-shaped grooves are provided, each corresponding to a three-phase sensor.

[0007] Furthermore, the positioning plate is also provided with a positioning surface that cooperates with the front inclined surface of the stationary cutter head connecting arm for positioning.

[0008] Furthermore, the positioning plate is provided with a square groove that is identical in shape to the stationary cutter head body for positioning the stationary cutter head body, and the front end face of the square groove constitutes the aforementioned positioning surface.

[0009] Furthermore, the support plate is set on the side opposite to the opening of the arc groove in the width direction of the positioning plate, and the positioning plate, support plate and base plate are arranged in a U-shaped structure.

[0010] Furthermore, the positioning plate is parallel to the base plate.

[0011] Furthermore, the positioning plate has a lower side that fits against the top plane of the sensor.

[0012] Furthermore, on one side of the arc-shaped groove opening direction, the edge of the positioning plate opposite to the supporting upright plate protrudes beyond the edge of the arc-shaped groove opening direction of the base plate.

[0013] Furthermore, the positioning plate, supporting upright plate, and base plate are an integral structure, and the whole is a bent plate.

[0014] Beneficial effects:

[0015] This utility model innovatively provides a positioning fixture for the stationary blade head of a grounding switch, including a positioning plate. The positioning plate is provided with positioning slots that correspond one-to-one with the three-phase stationary contacts, and a supporting plate is also provided on the positioning plate. A base plate is connected to the supporting plate, and the base plate can be stably placed on the upper surface of the grounding switch base. The base plate is also provided with at least two arc-shaped grooves that are adapted to the bottom contour of the sensor. The positioning fixture is positioned by the arc-shaped grooves, and then the stationary contact is positioned by the stationary blade head fixing fixture. When assembling the grounding switch, the stationary blade head is bolted to the sensor. After top-mounting, do not tighten the bolts immediately. Attach the lower surface of the base plate to the upper surface of the grounding switch base and align the arc groove with the bottom contour of the sensor. Then, insert the stationary contact into the positioning slot on the positioning plate and attach the front end face of the stationary blade to the positioning surface. Position the stationary contact in the left-right direction using the mounting slot. Tighten the bolts and remove the grounding switch stationary blade positioning fixture. This ensures the positioning accuracy of the three-phase stationary contact and solves the problem in existing technologies where the stationary blade may shift in the arrangement direction of the three-phase sensors during grounding switch assembly, resulting in poor installation and positioning accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a grounding switch in the prior art;

[0017] Figure 2 The existing grounding switch only shows a structural side view of the base, sensor, and stationary blade head;

[0018] Figure 3 for Figure 2 The diagram shows the structure after the grounding switch stationary knife head positioning fixture is installed.

[0019] Figure 4 A schematic diagram of the positioning fixture for the stationary blade head of a grounding switch;

[0020] Figure 5 This is a schematic diagram of the structure of a grounding switch with a stationary blade positioning fixture for grounding switches.

[0021] In the diagram: 1. Stationary cutter head positioning fixture; 11. Positioning slot; 12. Square groove; 13. Arc groove; 14. Positioning plate; 15. Support plate; 16. Base plate; 17. Positioning surface; 2. Stationary cutter head; 21. Mounting hole; 22. Stationary contact; 23. Stationary cutter head body; 24. Contact seat; 25. Connecting arm; 3. Sensor; 4. Grounding switch base. Detailed Implementation

[0022] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0023] The principle and concept of this utility model is to design an auxiliary positioning fixture for the stationary contact head used during the assembly of a grounding switch. Specifically, it includes a positioning plate with positioning slots that are the same width as the stationary contact head and correspond one-to-one with the three-phase stationary contacts. The left-right direction is taken as the direction of the three-phase sensor's arrangement axis. Figure 2 The contact seat 24 is oriented forward, and the stationary blade head 23 is oriented backward. The stationary contact is positioned left and right using a pre-set positioning slot. A support plate is provided on the positioning plate, and a base plate parallel to the positioning plate is connected to the support plate. The stationary blade head positioning fixture is placed on the grounding switch base via the base plate. The base plate also has at least two arc-shaped grooves that match the bottom contour of the sensor. The cooperation of at least two sets of arc-shaped grooves with the sensor prevents the stationary blade head positioning fixture from tilting. The positioning of the stationary blade head positioning fixture is achieved by cooperating with the sensor through the arc-shaped grooves on the base plate, and then the overall positioning of the stationary blade head is achieved through the mounting slot and positioning surface on the positioning plate. This method is convenient to operate, has a simple structure, and solves the problem in the prior art where the stationary blade head may be offset in the arrangement direction of the three-phase sensors during the assembly of the grounding switch, resulting in poor installation and positioning accuracy.

[0024] Based on the above principles and concepts, this utility model provides a grounding switch stationary knife head positioning fixture and its various embodiments for further explanation.

[0025] Based on the above principles, in a basic embodiment, such as Figure 3-5In the provided embodiment, the stationary blade positioning fixture 1 includes a positioning plate 14. The positioning plate 14 has a positioning slot 11 for positioning the stationary contact 22. The width of the positioning slot 11 is the same as the width of the stationary contact 22, and the position of the positioning slot 11 corresponds one-to-one with the three-phase stationary contact 22. The positioning plate 14 is also provided with a support plate 15, and the bottom of the support plate 15 is also provided with a base plate 16. The base plate 16 has a bottom support surface that fits against the top surface of the grounding switch base 4 to provide support for the support plate 15 and the positioning plate 14. The base plate 16 is also provided with at least two arc-shaped grooves 13. The shape of the arc-shaped grooves 13 is adapted to fit the bottom contour of the sensor 3. The stationary blade positioning fixture 1 is positioned as a whole by the cooperation of at least two sets of arc-shaped grooves 13 and the sensor 3.

[0026] The stationary knife head positioning fixture 1 is placed on the grounding switch base. First, the arc groove 13 is fitted with the bottom contour of the sensor 3 to position the stationary knife head positioning fixture 1. Then, the stationary contact 22 is inserted into the positioning slot 11. The stationary contact 22 is positioned by the hole wall of the positioning slot 11, which improves the positioning accuracy of the stationary knife head 2 during the installation of the grounding switch and solves the problem that the stationary knife head may be offset in the arrangement direction of the three-phase sensors during the assembly of the grounding switch in the prior art, resulting in poor installation positioning accuracy.

[0027] Based on the above embodiments, in one embodiment, two arc-shaped grooves are provided on the base plate, corresponding to the left and right sensors respectively, and a clearance square groove is provided in the middle of the base plate to avoid the sensor located in the middle position; in another embodiment, such as Figure 3-5 In the provided embodiment, the base plate 16 is provided with three arc-shaped grooves 13, which cooperate with the left, middle and right three-phase sensors 3 to realize the positioning of the stationary cutter head positioning fixture 1.

[0028] Based on the above embodiments, in one embodiment, such as Figure 3-5 In the provided embodiment, the positioning plate 14 is also provided with a positioning surface 17 that cooperates with the front end inclined surface of the connecting arm 25 of the stationary cutter head 2. The stationary cutter head 2 is positioned in the front-back direction by fully fitting the front end inclined surface of the connecting arm 25 with the upper edge of the positioning surface 17.

[0029] Based on the above embodiments, in one embodiment, such as Figure 3-5 In the provided embodiment, the positioning plate 14 is also provided with a square groove 12 that is consistent with the outline shape of the stationary cutter head body. The front end face of the groove wall of the square groove 12 constitutes the positioning surface 17 in the above embodiment. The two side walls of the square groove 12 are distributed on both sides of the stationary cutter head body 23. In another embodiment, a neat plane can also be provided on the positioning plate 14 as the positioning surface 17 to reduce the width of the positioning plate 14 and reduce the material consumption.

[0030] Based on the above embodiments, in one embodiment, such as Figure 3-5 In the provided embodiment, the support plate 15 is disposed on one side of the positioning plate 14 in the width direction, and the support plate 15 is disposed on the opposite side of the opening direction of the aforementioned arc-shaped groove 13. The positioning plate 14, the support plate 15, and the base plate 16 form a U-shaped structure. The positioning plate 14 and the support plate 15 are placed on the grounding switch base 4 based on the base plate 16. The stationary contact 22 is limited by the positioning plate 14 connected to the other end of the support plate 15. In another embodiment, the support plate 15 can be disposed on both sides of the positioning plate 14 in the length direction, and the base plate 16 is disposed at the bottom of the two support plates 15. The positioning plate 14, the base plate 16, and the two support plates 15 form a frame structure.

[0031] Based on the above embodiments, in one embodiment, such as Figure 3-5 In the provided embodiment, the positioning plate 14 and the base plate 16 are arranged in parallel on the upper and lower sides of the supporting plate 15. The parallel arrangement of the positioning plate 14 and the base plate 16 results in a more regular structure and more stable support.

[0032] Based on the above embodiments, in one embodiment, such as Figure 3-5 In the provided embodiment, the positioning plate 14 also has a lower side surface that fits against the top plane of the sensor 3. The bottom surface of the base plate 16 of the stationary knife head positioning fixture 1, which is thus configured, fits against the grounding switch base 4, and the supporting bottom surface of the positioning plate 14 fits against the top plane of the sensor 3. This can provide more stable support for the stationary knife head positioning fixture 1 and prevent the stationary knife head positioning fixture 1 from tipping over. In another embodiment, through holes can also be opened on the grounding switch base 4, and through holes can be opened on the base plate 16 at corresponding positions to the through holes on the grounding switch base 4. The stationary knife head positioning fixture 1 can be fixed on the grounding switch base 4 by bolts and nuts to prevent the stationary knife head positioning fixture 1 from tipping over.

[0033] Based on the above embodiments, in one embodiment, such as Figure 3-5 In the provided embodiment, on one side of the arc groove 13 opening direction, the edge of the positioning plate 14 opposite to the supporting upright plate 15 protrudes from the edge of the arc groove 13 opening direction of the bottom plate 16. This increases the width of the positioning plate 14, shifts the center of gravity of the stationary cutter head positioning fixture 1 to the rear, stabilizes the structure of the stationary cutter head positioning fixture 1, and prevents the stationary cutter head positioning fixture 1 from tipping forward.

[0034] Based on the above embodiments, in one embodiment, such as Figure 3-5In the provided embodiment, the positioning plate 14, the support plate 15, and the base plate 16 are bent plates formed by bending a single steel plate using an integrated forming process. The positioning plate 14, the support plate 15, and the base plate 16 have the same length and thickness. The static cutter head positioning fixture 1 made in this way has a simple process and is easy to manufacture. In another embodiment, the support plate 15, the positioning plate 14, and the base plate 16 can also be connected to each other by welding.

[0035] When using the grounding switch stationary blade head positioning fixture provided by this utility model, first, do not tighten the bolts that are inserted into the mounting holes 21 on the stationary blade head 2, keeping the stationary blade head 2 in a loose state. Then, push the stationary blade head positioning fixture 1 upward at a certain angle from below the stationary blade head 2, so that the arc groove 13 is in contact with the bottom surface of the sensor 3. Then, the bottom support surface of the base plate 16 is in contact with the upper end surface of the grounding switch base 4, so that the stationary contacts 22 on the three-phase stationary blade heads 2 are respectively locked into the corresponding positioning slots 11. The stationary contacts 22 are limited by the left and right side walls of the positioning slots 11, and the stationary blade head 2 is pushed to... The inclined surface of the connecting arm 25 is fully abutted against the upper edge of the positioning surface 17 of the positioning plate 14, ensuring the positioning accuracy of the stationary blade head 2 in the front-back direction. After the stationary blade head positioning fixture 1 is stably placed on the grounding switch base 4, the fastening bolts in the mounting hole 21 are tightened to complete the positioning of the stationary blade head 2. The stationary blade head positioning fixture provided by this utility model uses the positioning slot 11 and positioning surface 17 set on the positioning plate 14 to perform overall positioning of the stationary blade head 2, which solves the problem that the stationary blade head may be offset in the arrangement direction of the three-phase sensors during the assembly of the grounding switch in the prior art, resulting in poor installation positioning accuracy.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A positioning fixture for the stationary blade of a grounding switch, characterized in that, It includes a positioning plate, which has positioning slots that are the same width as the stationary contact and correspond one-to-one with the three-phase stationary contacts. The positioning plate also has a support plate, and a base plate is provided at the bottom of the support plate. The base plate has a bottom support surface that fits against the top surface of the grounding switch base. The base plate has at least two arc-shaped grooves that are adapted to the bottom contour of the sensor.

2. The grounding switch stationary knife head positioning fixture according to claim 1, characterized in that, There are three arc-shaped slots, each corresponding to a three-phase sensor.

3. The grounding switch stationary knife head positioning fixture according to claim 1, characterized in that, The positioning plate is also provided with a positioning surface that cooperates with the front inclined surface of the stationary cutter head connecting arm for positioning.

4. The grounding switch stationary knife head positioning fixture according to claim 3, characterized in that, The positioning plate is provided with a square groove that is identical in shape to the stationary cutter head body for positioning the stationary cutter head body. The front end face of the square groove constitutes the aforementioned positioning surface.

5. A positioning fixture for a grounding switch stationary knife head according to any one of claims 1-4, characterized in that, The support plate is set on the side opposite to the opening of the arc groove in the width direction of the positioning plate. The positioning plate, the support plate and the base plate are arranged in a U-shaped structure.

6. The grounding switch stationary knife head positioning fixture according to claim 5, characterized in that, The positioning plate is parallel to the base plate.

7. The grounding switch stationary knife head positioning fixture according to claim 6, characterized in that, The positioning plate has a lower side that fits against the top plane of the sensor.

8. The grounding switch stationary knife head positioning fixture according to claim 7, characterized in that, On one side of the arc-shaped groove opening direction, the edge of the positioning plate opposite to the supporting upright plate protrudes beyond the edge of the arc-shaped groove opening direction of the base plate.

9. A positioning fixture for a stationary blade of a grounding switch according to claim 5, characterized in that, The positioning plate, support plate and base plate are an integral structure, and the whole is a bent plate.

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