Over-travel adjusting device of vacuum circuit breaker and use method of over-travel adjusting device

Abstract

The invention discloses an over-travel adjusting device of a vacuum circuit breaker and a use method of the over-travel adjusting device. The over-travel adjusting device comprises a positioning part and an adjusting part, the positioning piece comprises a positioning sleeve and a control part fixedly connected to one end of the positioning sleeve; the end, away from the control part, of the positioning sleeve is provided with a positioning structure in positioning connection with a guide sleeve of the pull rod assembly. The positioning structure is suitable for limiting rotation of the positioning sleeve relative to the guide sleeve after being in positioning connection with the positioning sleeve, an axial opening is formed in the opposite position of the side wall of the positioning sleeve, and the adjusting part is suitable for penetrating into the positioning sleeve to screw the adjusting bolt; and a limiting step which forms a backstop with the adjusting bolt is arranged in the positioning sleeve. By means of the overtravel adjusting device, the overtravel can be rapidly and effectively adjusted in place, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of vacuum circuit breaker production, and particularly relates to an overtravel adjustment device of a vacuum circuit breaker and a use method thereof. Background Art

[0002] As a crucial switchgear in power systems, the performance of vacuum circuit breakers directly impacts grid security and stability. Vacuum circuit breakers effectively interrupt current through their vacuum interrupter chambers, and the travel of their moving contacts is a key parameter for proper operation. In practice, the travel of the moving contacts must be within a specific range to ensure effective arc extinguishing during switching and to avoid degradation of interrupting performance due to excessive or insufficient overtravel.

[0003] Overtravel refers to the extent to which the moving contact's travel exceeds its normal operating range during opening or closing. Excessive overtravel can lead to increased mechanical wear and even contact damage. However, too little overtravel can affect the contact performance of the moving contact. Specifically, too little overtravel can prevent the moving contact from fully closing, affecting the circuit's conductivity. Therefore, during the production and assembly of vacuum circuit breakers, the moving contact's overtravel must be strictly regulated and controlled.

[0004] Currently, traditional overtravel adjustment methods rely primarily on manual adjustments followed by testing. This method requires workers to perform a series of tests after each adjustment to ensure that the overtravel meets design requirements. This manual adjustment process is not only time-consuming and labor-intensive, resulting in low production efficiency, but can also lead to inaccurate adjustments due to human error, thus compromising production efficiency and product quality. Summary of the Invention

[0005] To this end, the object of the present invention is to provide an overtravel adjustment device for a vacuum circuit breaker and a method for using the same, which can adjust the overtravel more efficiently and accurately, thereby improving production efficiency and adjustment accuracy.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In the first aspect, the present invention provides an overtravel adjustment device for a vacuum circuit breaker, comprising a positioning member and an adjusting member; the positioning member comprises a positioning sleeve and a control portion fixedly connected to one end of the positioning sleeve; the end of the positioning sleeve away from the control portion is provided with a positioning structure for being positioned and connected to a guide sleeve of a pull rod assembly; the positioning structure is suitable for limiting the rotation of the positioning sleeve relative to the guide sleeve after forming a positioning connection with the positioning sleeve, an axial opening is provided at a relative position on the side wall of the positioning sleeve, and the adjusting member is suitable for penetrating into the positioning sleeve to screw the adjusting bolt; a limiting step is provided in the positioning sleeve to form a stop for the adjusting bolt.

[0008] Preferably, the operating part includes a control rod fixedly connected to the end of the positioning sleeve away from the positioning structure and a handle on the end of the control rod away from the positioning sleeve. The control rod has a through cavity that passes through the axial direction and is connected to the inner cavity of the positioning sleeve. The adjusting part is suitable for extending into the positioning sleeve after passing through the through cavity.

[0009] Preferably, the positioning structure is a ring body with an inner sleeve hole, the inner edge of the inner sleeve hole cross section is non-circular, and the outer edge of the cross section of the end of the guide sleeve connected to the adjusting bolt is matched in shape.

[0010] Preferably, the handle is vertically connected to the control rod.

[0011] Preferably, the adjusting member is a screwdriver.

[0012] In a second aspect, the present invention provides a method for using the overtravel adjustment device of the above-mentioned vacuum circuit breaker, wherein the vacuum circuit breaker includes a pull rod assembly and a phase bracket, the pull rod assembly including an insulating pull rod, an overtravel spring, a guide sleeve and an adjusting bolt, the adjusting bolt being threaded onto one end of the guide sleeve, and a positioning portion and a stop step located at the root of the positioning portion are provided on the guide sleeve at an end close to the adjusting bolt, a slot is provided on the adjusting bolt at an end away from the guide sleeve, the phase bracket is provided with a strip sliding hole, the head of the adjusting bolt is provided with a pin shaft hole extending radially therethrough, and a connecting pin is provided through the strip sliding hole and the pin shaft hole; when using the adjustment device, the following steps are followed:

[0013] A. Sleeve the positioning sleeve over the outer periphery of the adjusting bolt and connect the positioning structure with the positioning portion on the guide sleeve. At the same time, the end of the positioning sleeve abuts against the stop step. At this time, the positioning sleeve cannot rotate relative to the guide sleeve.

[0014] B. Insert the adjusting member into the positioning sleeve and plug it into the slot. Then, the positioning sleeve is used to keep the guide sleeve stationary. The adjusting member is used to control the rotation of the adjusting bolt, causing the adjusting bolt to generate axial displacement relative to the guide sleeve for overtravel adjustment until the adjusting bolt abuts against the limit step.

[0015] C. Pull out the adjusting part and the positioning part, and pass the connecting pin through the pin shaft hole and the strip sliding hole.

[0016] The positive effects of the present invention are: the structure of the overtravel adjustment device in the present invention has been optimized and designed, and during use, a connection is formed between the positioning sleeve and the guide sleeve in the pull rod assembly, and the axial limitation is performed by the end of the positioning sleeve and the abutment step of the guide sleeve. Then the adjusting part is inserted into the positioning sleeve and the adjusting bolt is screwed until the adjusting bolt and the limiting step in the positioning sleeve are abutted, indicating that the adjusting bolt is in place, and the stopping function of the limiting step on the adjusting bolt prevents excessive overtravel adjustment, that is, the overtravel adjustment is in place; using the overtravel adjustment device in this embodiment to perform overtravel adjustment can effectively improve the efficiency of overtravel adjustment and the accuracy of adjustment, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts in the drawings are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a structural diagram of the vacuum circuit breaker pull rod assembly and the mechanism box (partial);

[0019] Figure 2 Schematic diagram of the structure of the overtravel adjustment device in the present invention;

[0020] Figure 3 An exploded view of the overtravel adjustment device of the present invention;

[0021] Figure 4 This is a schematic structural diagram of the first positioning sleeve in the present invention;

[0022] Figure 5 This is a schematic structural diagram of the second positioning sleeve in the present invention;

[0023] Figure 6 for Figure 5 A partial enlarged view of point A in the middle;

[0024] Figure 7 It is a structural schematic diagram of the overtravel adjustment device of the present invention during adjustment use.

[0025] The reference numerals shown in the figure are: 1. positioning member; 11. positioning sleeve; 111. annular body; 112. slot; 113. strip sliding hole; 12. operating part; 121. control rod; 122. handle; 123. through cavity; 13. axial opening; 14. limiting step; 2. adjusting member; 3. adjusting bolt; 31. slot; 32. pin shaft hole; 4. insulating pull rod; 5. overtravel spring; 6. guide sleeve; 61. positioning part; 62. resisting step; 7. connecting pin; 8. adjustable block; 81. latch tooth; 82. locking screw; 83. reaction spring; 9. sliding pad; 10. pull rod assembly; 20. phase bracket; 201. strip sliding hole; 30. mechanism box. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0027] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0028] In the first aspect, the overtravel adjustment device of the vacuum circuit breaker in the embodiment of the present invention includes a positioning member 1 and an adjusting member 2 (such as a screwdriver); the positioning member 1 includes a positioning sleeve 11 and a control portion 12 fixedly connected to one end of the positioning sleeve 11; the end of the positioning sleeve 11 away from the control portion 12 is provided with a positioning structure for being positioned and connected to the guide sleeve 6 of the pull rod assembly; the positioning structure is suitable for limiting the rotation of the positioning sleeve 11 relative to the guide sleeve 6 after forming a positioning connection with the positioning sleeve 11, and an axial opening 13 is provided at a relative position on the side wall of the positioning sleeve 11, and the adjusting member 2 is suitable for penetrating into the positioning sleeve 11 to screw the adjusting bolt 3; the positioning sleeve 11 is provided with a stopper for the adjusting bolt 3 The limiting step 14 of the block; through the optimization of the structure in this embodiment, in actual use, a connection is formed between the positioning sleeve 11 and the guide sleeve 6 in the pull rod assembly, and the axial limitation is performed by the end of the positioning sleeve 11 and the abutment step 62 of the guide sleeve 6, and then the adjusting part 2 is inserted into the positioning sleeve 11 to screw the adjusting bolt 3 until the adjusting bolt 3 is abutted against the limiting step 14 in the positioning sleeve 11, indicating that the adjusting bolt 3 is in place, and the limiting step 14 has a stopping function on the adjusting bolt 3 to prevent excessive over-travel adjustment, that is, the over-travel adjustment is in place; using the over-travel adjustment device in this embodiment to perform over-travel adjustment can effectively improve the efficiency of over-travel adjustment and the accuracy of adjustment, and has good practicality.

[0029] In the above embodiment, the limiting step 14 is integrally formed on the positioning sleeve 11. In another embodiment, see Figure 5 and Figure 6 As shown, in order to enhance the versatility of the adjustment device, the limit step 14 can be set on the adjustable block 8, and the adjustable block 8 can be adjusted in the axial position inside the positioning sleeve 11. In this way, in actual application, the position of the limit step 14 can be flexibly adjusted according to the overtravel set as needed; specifically, a plurality of axially spaced slots 112 and axially extending strip sliding holes 113 are provided on the inner wall of the positioning sleeve 11, the adjustable block 8 is provided inside the positioning sleeve 11, and the limit step 14 is provided at the lower end of the adjustable block 8; a sliding pad 9 and a reaction spring 83 are provided outside the positioning sleeve 11, and the locking screw 82 is connected to the adjustable block 8 after passing through the reaction spring 83, the sliding pad 9 and the strip sliding hole 113, and the adjustable block 8 is provided with a locking tooth 81 that is engaged with the slot 112 When the adjustable block 8 needs to be adjusted, the adjustable block 8 is pulled to disengage the tooth 81 from the slot 112, and then the adjustable block 8 is moved and the sliding block 9 is driven to slide along the strip-shaped sliding hole 113 by the locking screw 82. When the adjustable block 8 is moved to the appropriate position, it is released and the tooth 81 is engaged with the slot 112 again under the action of the reaction spring 83, thereby realizing the re-positioning of the adjustable block 8. In this way, the limit adjustment of the adjusting bolt 3 is realized by changing the position of the adjustable block 8 to meet the needs of different stroke adjustments.

[0030] See attached Figure 2 and Figure 3 As shown, in this embodiment, the control portion 12 includes a control rod 121 fixedly connected to the end of the positioning sleeve 11 away from the positioning structure, and a handle 122 on the end of the control rod 121 away from the positioning sleeve 11. The control rod 121 is fixedly connected to the end of the positioning sleeve 11 away from the positioning structure, providing the user with better control flexibility; the provision of the handle 122 allows the user to hold it more comfortably during operation. The control rod 121 is further provided with a through cavity 123 that runs axially through and communicates with the inner cavity of the positioning sleeve 11. The design of the through cavity 123 allows the adjustment member 2 to smoothly pass through and penetrate into the interior of the positioning sleeve 11. During use, the adjustment member 2 passes through the through cavity 123 and extends into the positioning sleeve 11 to connect with the adjustment bolt 3. Preferably, the handle 122 and the control rod 121 are connected perpendicularly to form a T-shaped structure.

[0031] In order to ensure the circumferential limiting effect between the positioning sleeve 11 and the guide sleeve 6, the positioning structure is set to a ring body 111 with an inner sleeve hole, and the inner edge shape of the cross-section of the inner sleeve hole is non-circular, and the outer edge shape of the cross-section of the end of the guide sleeve 6 connected to the adjusting bolt 3 matches. Exemplarily, the non-circular shape can be polygonal, D-shaped or waist-shaped, etc., so that the inner sleeve hole of the ring body 111 is sleeved on the corresponding part of the guide sleeve 6 when in use.

[0032] In a second aspect, an embodiment of the present invention further provides a method for using the overtravel adjustment device of the vacuum circuit breaker in the above embodiment, wherein the vacuum circuit breaker includes a pull rod assembly 10 and a phase bracket 20, see Figure 1 As shown, the pull rod assembly 10 includes an insulating pull rod 4, an overtravel spring 5, a guide sleeve 6 and an adjusting bolt 3, the adjusting bolt 3 is screwed on one end of the guide sleeve 6, and a positioning portion 61 and a stop step 62 at the root of the positioning portion 61 are provided on the guide sleeve 6 at one end close to the adjusting bolt 3, and a slot 31 is provided on the end of the adjusting bolt 3 away from the guide sleeve 6, the phase bracket 20 is fixed to the mechanism box 30 (only a part of the figure is shown) of the circuit breaker operating mechanism, the phase bracket 20 is provided with a strip sliding hole 201, the head of the adjusting bolt 3 is provided with a pin shaft hole 32 that penetrates radially, and the connecting pin 7 is provided through the strip sliding hole 201 and the pin shaft hole 32. When the circuit breaker is assembled, the operating mechanism is connected to the connecting pin 7. When the opening and closing action is performed, the operating mechanism drives the moving contact connected to the pull rod assembly 10 to move through the connecting pin 7 to realize the opening and closing control of the circuit breaker; refer to Figure 7 When the adjusting device in the above embodiment is used, the following steps are followed: A. The positioning sleeve 11 is sleeved on the outer periphery of the adjusting bolt 3 and the positioning structure is connected to the positioning portion 61 on the guide sleeve 6, and at the same time, the end of the positioning sleeve 11 abuts against the abutting step 62. At this time, the positioning sleeve 11 cannot rotate relative to the guide sleeve 6; B. The adjusting member 2 is inserted into the positioning sleeve 11 and plugged into the slot 31, and then the guide sleeve 6 is kept stationary by the positioning sleeve 11, and the adjusting member 2 is used to control the rotation of the adjusting bolt 3 so that the adjusting bolt 3 produces axial displacement relative to the guide sleeve 6 for overtravel adjustment until the adjusting bolt 3 abuts against the limiting step 14; C. The adjusting member 2 and the positioning member 1 are pulled out, and the connecting pin 7 is passed through the pin shaft hole 32 and the strip sliding hole 201; wherein, the slot 31 can be set as a straight slot, a cross slot, etc. Using the overtravel adjustment device in this application and performing overtravel adjustment according to the method of use in this embodiment can effectively improve production efficiency and improve the accuracy of overtravel adjustment, and has good practicality.

[0033] Those skilled in the art will readily appreciate that other variations or modifications may be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. However, any obvious variations or modifications derived from the essential spirit of the present invention remain within the scope of protection of the present invention.

Claims

1. An overtravel adjustment device for a vacuum circuit breaker, characterized in that: The invention comprises a positioning member (1) and an adjusting member (2); the positioning member (1) comprises a positioning sleeve (11) and an operating portion (12) fixedly connected to one end of the positioning sleeve (11); an end of the positioning sleeve (11) away from the operating portion (12) is provided with a positioning structure for being positioned and connected with a guide sleeve (6) of a pull rod assembly; the positioning structure is suitable for limiting the rotation of the positioning sleeve (11) relative to the guide sleeve (6) after forming a positioning connection with the positioning sleeve (11); an axial opening (13) is provided at a relative position on the side wall of the positioning sleeve (11); the adjusting member (2) is suitable for being inserted into the positioning sleeve (11) and being screwed with the adjusting bolt (3); a limiting step (14) is provided in the positioning sleeve (11) to form a stop for the adjusting bolt (3).

2. The overtravel adjustment device for a vacuum circuit breaker according to claim 1, characterized in that: The control portion (12) comprises a control rod (121) fixedly connected to an end of the positioning sleeve (11) away from the positioning structure and a handle (122) connected to an end of the control rod (121) away from the positioning sleeve (11). The control rod (121) has a through cavity (123) that runs axially through and communicates with the inner cavity of the positioning sleeve (11). The adjusting member (2) is suitable for passing through the through cavity (123) and then extending into the positioning sleeve (11).

3. The overtravel adjustment device for a vacuum circuit breaker according to claim 1, characterized in that: The positioning structure is a ring body (111) having an inner sleeve hole, the inner edge of the inner sleeve hole cross section is non-circular, and the outer edge of the cross section of the end of the guide sleeve (6) connected to the adjusting bolt (3) matches the shape.

4. The overtravel adjustment device for a vacuum circuit breaker according to claim 1, characterized in that: The handle (122) is vertically connected to the control rod (121).

5. The overtravel adjustment device for a vacuum circuit breaker according to claim 1, characterized in that: The adjusting member (2) is a screwdriver.

6. A method for using an overtravel adjustment device of a vacuum circuit breaker according to any one of claims 1 to 5, wherein the vacuum circuit breaker comprises a pull rod assembly (10) and a phase bracket (20), the pull rod assembly (10) comprising an insulating pull rod (4), an overtravel spring (5), a guide sleeve (6) and an adjusting bolt (3), the adjusting bolt (3) being screwed to one end of the guide sleeve (6), and a positioning portion (61) and a stop step (62) located at the root of the positioning portion (61) being provided on the end of the guide sleeve (6) close to the adjusting bolt (3), a slot (31) being provided on the end of the adjusting bolt (3) away from the guide sleeve (6), a strip sliding hole (201) being provided on the phase bracket (20), a pin shaft hole (32) penetrating radially being provided on the head of the adjusting bolt (3), and a connecting pin (7) being provided through the strip sliding hole (201) and the pin shaft hole (32); characterized in that: When using the adjustment device, follow these steps: A. Sleeve the positioning sleeve (11) onto the outer periphery of the adjusting bolt (3) and connect the positioning structure with the positioning portion (61) on the guide sleeve (6). At the same time, the end of the positioning sleeve (11) abuts against the stop step (62). At this time, the positioning sleeve (11) cannot rotate relative to the guide sleeve (6); B. Insert the adjusting member (2) into the positioning sleeve (11) and connect it to the slot (31), then keep the guide sleeve (6) stationary through the positioning sleeve (11), and use the adjusting member (2) to control the rotation of the adjusting bolt (3), so that the adjusting bolt (3) generates axial displacement relative to the guide sleeve (6) for overtravel adjustment until the adjusting bolt (3) abuts against the limit step (14); C. Pull out the adjusting member (2) and the positioning member (1), and pass the connecting pin (7) through the pin shaft hole (32) and the strip sliding hole (201).

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