A torque test tool for closing and opening stroke debugging
By setting a retaining plate and a limiting hole on the moving contact of the disconnector/grounding switch, and using a torque application tool to limit the rotation angle of the drive shaft, the low accuracy problem of relying on experience-based judgment in the prior art is solved, and accurate control of the opening and closing stroke and improved safety are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI SIEYUAN HIGH VOLTAGE SWITCHGEAR
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-19
Smart Images
Figure CN224382675U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of electrical equipment, and in particular to a torque testing fixture for adjusting the opening and closing stroke. Background Technology
[0002] With the rapid development of the national economy, the demand for energy is increasing, leading to a greater demand for high-voltage equipment. Among them, isolating / grounding switches are essential components in power equipment, and power grid companies and business owners are placing increasingly higher demands on the reliability of these products.
[0003] To ensure the reliability of the opening and closing of isolating / grounding switches, routine testing of the opening and closing torque is necessary to ensure that the torque is within an acceptable error range. However, existing testing methods often involve directly mounting the torque application tool onto the drive shaft of the moving contact and relying on the operator's experience to determine whether the drive mechanism of the moving contact is properly installed (relying on the operator's experience to determine whether the moving contact is properly opened or closed). This method is inaccurate, prone to misjudgment, and can easily lead to excessive or insufficient opening and closing stroke of the moving contact, or even cause the moving contact to collide, generate foreign objects, and cause a discharge accident. In addition, it places too high demands on the operators and has poor feasibility. Utility Model Content
[0004] This utility model provides a torque testing fixture for adjusting the opening and closing stroke, which solves the technical problems of existing testing methods that rely heavily on the operator's experience, resulting in low accuracy and poor feasibility.
[0005] This utility model can be achieved through the following technical solutions:
[0006] A torque testing fixture for adjusting the opening and closing stroke of a disconnector / grounding switch is provided. A clamping plate is mounted on the drive shaft of the moving contact of the disconnector / grounding switch. One end of the clamping plate has a limit hole, and the other end has a bayonet that mates with the drive shaft, as well as a clamping head that mates with a torque application tool.
[0007] A limiting post is provided inside the limiting hole. One end of the limiting post is fixedly mounted on the moving contact unit structure, and the other end extends into the limiting hole.
[0008] Using a torque-applying tool to rotate the clamping plate, the drive shaft rotates, causing the clamping plate to rotate from one end of the limiting hole to the other end until it is blocked by the limiting post.
[0009] Furthermore, the bayonet is located on the bottom surface of the card plate, and the card head is located on the top surface of the card plate, with the two positioned opposite each other.
[0010] Furthermore, the bayonet opening is a hollow quadrilateral structure, and the bayonet head is a quadrangular prism structure.
[0011] Furthermore, the limiting hole is arc-shaped, and the center of the circle containing the arc coincides with the axis of the drive shaft. Its arc length is determined by the theoretical stroke of the opening and closing mechanism.
[0012] Furthermore, the limiting post passes through the limiting hole, and one end of it is fixed to the pressure plate of the drive shaft.
[0013] Furthermore, the card plate has a fan-shaped structure, the limiting hole is located at the edge of the card plate, and the card head and card opening are located at the center of the card plate.
[0014] The beneficial technical effects of this utility model are as follows:
[0015] 1. The drive shaft and torque application tool are connected by a clamping plate. With the cooperation of the limit post and limit hole, the rotation angle of the drive shaft driven by the torque application tool can be limited to the arc length area of the limit hole. Therefore, as long as the arc length of the limit hole is designed according to the breaking stroke of the isolating / grounding switch, the rotation angle of the drive shaft can be accurately controlled, thereby accurately controlling the moving distance of the moving contact, ensuring the safety of opening and closing. It does not rely on the experience judgment of the operator, has higher accuracy, stronger practicality, and wider application range.
[0016] 2. Considering the moving contact structure of the isolating / grounding switch, the card plate of this utility model adopts a fan-shaped structure, which not only facilitates the cooperation between the card slot and the drive shaft, but also facilitates the setting of the limit hole of the arc structure. At the same time, it can save materials and reduce costs. In addition, the overall structure is simple, easy to implement, and more applicable. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the torque testing fixture of this utility model assembled onto the moving contact unit structure;
[0018] Figure 2 This is a schematic diagram of the external shape of the moving contact unit structure of an existing isolating / grounding switch;
[0019] Figure 3 This is a schematic diagram of the torque testing fixture without limit pins according to this utility model. Figure 1 ;
[0020] Figure 4 This is a schematic diagram of the torque testing fixture without limit pins according to this utility model. Figure 2 ;
[0021] Among them, 1-drive shaft, 2-clamping plate, 3-limiting hole, 4-bayonet, 5-clamping head, 6-limiting post, 7-pressure plate. Detailed Implementation
[0022] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.
[0023] like Figure 1-4 As shown, this utility model provides a torque testing fixture for adjusting the opening and closing stroke of a disconnector / grounding switch. A clamping plate 2 is installed on the drive shaft 1 of the moving contact of the disconnector / grounding switch. One end of the clamping plate 2 has a limiting hole 3, and the other end has a clamping slot 4 that mates with the drive shaft 1 and a clamping head 5 that mates with a torque application tool. A limiting post 6 is installed inside the limiting hole 3. One end of the limiting post 6 is fixed to the moving contact unit structure, and the other end extends into the limiting hole 3. Thus, by rotating the clamping plate using the torque application tool, the drive shaft 1 rotates, causing the clamping plate 2 to rotate from one end of the limiting hole 3 to the other until it is blocked by the limiting post 6. This limits the rotation angle of the drive shaft 1, accurately meeting the opening / closing stroke requirements of the disconnector / grounding switch without requiring operator experience. This ensures the reliability of opening and closing during torque measurement, is highly feasible, and easy to promote and apply.
[0024] Specifically as follows:
[0025] The card plate 2 can be fan-shaped, matching the shape of the drive mechanism in the moving contact unit of the isolating / grounding switch. The limiting hole 3 is located at the edge of the card plate 1, while the card head 5 and the card slot 4 are located at the center of the card plate 2. The limiting hole 3 is arc-shaped, and the center of the arc coincides with the axis of the drive shaft 1. Its arc length can be determined by the theoretical stroke of opening and closing, thereby accurately limiting the rotation angle of the drive shaft 1, so as to accurately control the moving distance of the moving contact, i.e., the breaking stroke, and thus ensure the safety of opening and closing.
[0026] The bayonet 4 can be set on the bottom surface of the card plate 1, and the card head 5 can be set on the top surface of the card plate. The two are set opposite to each other. The bayonet 4 is a hollow quadrilateral structure and is fitted onto the end of the drive shaft 1, while the card head 5 is a quadrangular prism structure so that the torque application tool can apply torque to the drive shaft 1 with the help of the card head 5. Of course, the specific structure of the bayonet 4 and the card head 5 can be determined according to the structure of the torque application tool and the drive shaft, so as to facilitate the cooperation between the two.
[0027] The limiting post 6 passes through the limiting hole 3. One end of it is fixed to the pressure plate 7 of the drive shaft 1 and can be fixed by a threaded structure. The other end is exposed outside the limiting hole 3, so as to better limit the rotation position of the clamping plate 2.
[0028] When using the torque testing fixture of this utility model, first install the limiting post 6 onto the pressure plate 7 of the moving contact, then assemble the jaw 4 of the clamping plate 2 onto the drive shaft 1 of the moving contact, while ensuring that the limiting post 6 passes through the limiting hole 3. Note that the limiting post 6 should be tightly attached to one end of the limiting hole 3 at this time. Finally, clamp the torque application tool, such as a torque wrench, onto the clamping head 5. The operator rotates the torque wrench to drive the clamping plate 2 to rotate from one end of the limiting hole 3 to the other end until it is blocked by the limiting post 6. Since the jaw 4 of the clamping plate 2 cooperates with the drive shaft 1, the drive shaft 1 will also rotate during the rotation of the clamping plate 2. With the help of the blocking of the limiting post 6, the rotation angle of the drive shaft 1 is consistent with the arc length of the limiting hole 3. The arc length of the limiting hole 3 is determined by the theoretical stroke of opening and closing. In this way, the rotation angle of the drive shaft 1 can be accurately limited, which is the moving distance of the moving contact, ensuring the safety of opening and closing.
[0029] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples. Various changes or modifications can be made to these embodiments without departing from the principles and essence of the present invention. Therefore, the scope of protection of the present invention is defined by the appended claims.
Claims
1. A torque testing fixture for adjusting the opening and closing stroke, characterized in that: This device is used in disconnect switches / grounding switches. A retaining plate is provided on the drive shaft of the moving contact of the disconnect switch / grounding switch. One end of the retaining plate has a limit hole, and the other end has a bayonet that mates with the drive shaft, as well as a retaining head that mates with a torque application tool. A limiting post is provided inside the limiting hole. One end of the limiting post is fixedly mounted on the moving contact unit structure, and the other end extends into the limiting hole. Using a torque-applying tool to rotate the clamping plate, the drive shaft rotates, causing the clamping plate to rotate from one end of the limiting hole to the other end until it is blocked by the limiting post.
2. The torque testing fixture for adjusting the opening and closing stroke according to claim 1, characterized in that: The bayonet is located on the bottom surface of the card plate, and the card head is located on the top surface of the card plate, with the two positioned opposite each other.
3. The torque testing fixture for adjusting the opening and closing stroke according to claim 2, characterized in that: The bayonet is a hollow quadrilateral structure, and the bayonet head is a quadrangular prism structure.
4. The torque testing fixture for adjusting the opening and closing stroke according to claim 1, characterized in that: The limiting hole is arc-shaped, and the center of the circle containing the arc coincides with the axis of the drive shaft. The arc length is determined by the theoretical stroke of the opening and closing circuit.
5. The torque testing fixture for adjusting the opening and closing stroke according to claim 4, characterized in that: The limiting post passes through the limiting hole, and one end of it is fixed to the pressure plate of the drive shaft.
6. The torque testing fixture for adjusting the opening and closing stroke according to claim 1, characterized in that: The card plate has a fan-shaped structure, the limiting hole is located at the edge of the card plate, and the card head and card opening are located at the center of the card plate.