A circuit breaker tie rod adjustment device

Abstract

The application discloses a circuit breaker pull rod adjusting device and relates to the technical field of circuit breaker accessories.The device comprises a base, a fixed end positioning part, a fixed end screw positioning block, a first adjusting screw positioning block, a first supporting block, a second supporting block, a vernier caliper, a fixed plate, a spring, a movable limiting pin and a second fixed pin.The fixed end screw positioning block is used for positioning the first adjusting screw of both the new pull rod and the old pull rod.The first supporting block is used for supporting the second adjusting screw of the old pull rod.The second adjusting screw on the old pull rod is fixed to the base through a first fixed pin.The second adjusting screw on the new pull rod is provided with a second fixed pin, which can be slidably adjusted on the base.The vernier caliper comprises a ruler body and a measuring head.The ruler body is arranged between the two first supporting blocks and the second supporting block along the direction in which the pull rod is extended.The measuring head is slidably connected to the ruler body.The measuring head is provided with a movable limiting pin on one side.The fixed plate is arranged away from the vernier caliper.The spring is fixedly connected between the fixed plate and the measuring head and is used for pulling the measuring head to slide.The device can accurately position the length of the new and old pull rods, the length of the new pull rod can be adjusted to be consistent with the length of the old pull rod, and the pull rod adjusting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breaker accessories, in particular to a circuit breaker pull rod adjusting device. BACKGROUND

[0002] The circuit breaker pull rod, also known as an insulating pull rod, is an important component of a circuit breaker, mainly used for transmission connection with the moving contact of a vacuum arc extinguishing chamber to transmit power. The insulating pull rod is usually made of a new type of insulating material, has good sealing performance, anti-aging, high voltage resistance, non-combustion and other characteristics, and is widely used in the control and protection of various power equipment and power lines.

[0003] At present, due to the design defects of existing circuit breakers, or the circuit breaker pull rod needs to be replaced after being used for a period of time, when the circuit breaker pull rod is replaced, the center distance of the round holes at both ends of the new pull rod needs to be adjusted to be consistent with that of the old pull rod to ensure the normal use of the pull rod. Without fixation, even if the center distance of the round holes of the adjusting screws at both ends of the new and old pull rods is adjusted to be consistent, when the nut is tightened, the adjusting screws at both ends will be rotated together, causing the length to change. Therefore, repeated comparison needs to be made during installation, which is time-consuming and laborious. SUMMARY

[0004] In view of the above problems, the present application provides a circuit breaker pull rod adjusting device which can effectively prevent the length of the pull rod from changing due to the rotation of the pull rod when the nut is tightened, and can solve the problem of low work efficiency caused by the lack of fixation of the pull rod as a whole. The specific technical scheme is as follows:

[0005] A circuit breaker pull rod adjusting device, comprising:

[0006] a base for supporting the old pull rod and the new pull rod;

[0007] a fixed end positioning part comprising a fixed end screw positioning block, the fixed end screw positioning block positioning the first adjusting screw of both the new pull rod and the old pull rod;

[0008] an adjusting end positioning part comprising a first support block and a second support block; the first support block is used to support the second adjusting screw of the old pull rod, the second adjusting screw on the old pull rod is fixed to the base through a first fixed pin, and the second adjusting screw on the new pull rod is provided with a second fixed pin which can be slidably adjusted on the base;

[0009] The vernier caliper comprises a ruler body and a measuring head, the ruler body is arranged between the two first supporting blocks and the second supporting block along the extension direction of the pull rod, the measuring head is slidingly connected to the ruler body, and one side of the measuring head is provided with a movable limiting pin; a fixed plate is arranged away from the vernier caliper, and a resilient member is fixedly connected between the fixed plate and the measuring head, and the resilient member pulls the measuring head to slide.

[0010] Preferably, the bottom of the new pull rod is provided with a sliding groove.

[0011] The bottom end of the second fixing pin is slidingly arranged in the sliding groove.

[0012] Preferably, the first adjusting screw and the second adjusting screw of the new pull rod are both provided with a pressing part.

[0013] The pressing part comprises a supporting seat, an inclined connecting plate is arranged at the top of the supporting seat, a first U-shaped pressing rod is rotatably connected to the top end of the inclined surface of the connecting plate, and a pressing column is arranged at the end of the first U-shaped pressing rod.

[0014] Second U-shaped pressing rods are arranged on both sides of the first U-shaped pressing rod, and the bottom of the second U-shaped pressing rod is rotatably connected to the bottom end of the inclined surface of the connecting plate.

[0015] A pressing plate is rotatably connected to the middle part of the second U-shaped pressing rod, and the other end of the pressing plate is rotatably connected to the two side edges of the first U-shaped pressing rod through a pin.

[0016] Preferably, a middle screw adjusting and fixing part is further arranged on the base, and the middle screw adjusting and fixing part is located on one side of the new pull rod.

[0017] The middle screw adjusting and fixing part comprises a locking block, a lead screw, a sliding rod, a sliding block, a nut connecting seat and a fixed wrench.

[0018] The two ends of the lead screw pass through two bearing seats and pass out of the locking block, a lead screw copper sleeve is arranged on the lead screw, a sliding rod is arranged between the two bearing seats, a sliding block is slidingly connected to the sliding rod, a connecting block is connected to the sliding block, the connecting block is fixedly connected to the lead screw copper sleeve, the nut connecting seat is connected to the lead screw copper sleeve, and the fixed wrench is rotatably connected to the top of the nut connecting seat through a connecting rod.

[0019] A hand turning disc is fixedly connected to one end of the lead screw outside the base.

[0020] Preferably, the fixed end screw positioning block further comprises a U-shaped fixed block, two fixed holes are arranged at the top of the U-shaped fixed block, and a positioning pin corresponding to the round hole of the old pull rod and the first adjusting screw of the new pull rod is inserted into each fixed hole.

[0021] Preferably, the adjusting end positioning part further comprises a third supporting block, and two arc-shaped grooves are formed in the top of the third supporting block, and the two arc-shaped grooves are used for supporting the first adjusting screw of the old pull rod and the new pull rod respectively.

[0022] Preferably, a bolt fixing block is fixed on the base on the side of the old pull rod, and a sliding hole corresponding to the limiting bolt is arranged on the bolt fixing block, and the limiting bolt is slidably arranged in the sliding hole.

[0023] Preferably, a limiting hole is formed in one side of the sliding hole, and a protruding limiting plate is arranged on the limiting bolt, and the limiting plate is clamped on the limiting hole and can freely slide in the limiting hole.

[0024] Preferably, the bottom of the vernier caliper is provided with two spaced apart scale supporting seats, the bottom of the scale supporting seat is provided with a clamping groove, the two ends of the scale are clamped on the two clamping grooves respectively, and a cover plate is arranged on the connection position of the scale and the clamping groove.

[0025] Preferably, one end of the measuring head is provided with a triangular clamping block, and the triangular clamping block can be clamped between the two first supporting blocks and the second supporting block.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1、In the present application, the center distance of the round holes at both ends of the new pull rod can be adjusted to be approximately the same as that of the old pull rod, then the first adjusting screw at one end is fixed on the fixed pin, the middle screw is rotated using a wrench, the first fixed pin at the other end of the new pull rod is moved to the same position as the second fixed pin of the old pull rod, the adjusting screw of the new pull rod is clamped, and finally the nut is tightened; the length of the pull rod is prevented from changing when the nut is tightened, the problems of low work efficiency caused by the fact that the pull rod is not fixed as a whole can be solved, and the lengths of the new and old pull rods can be accurately positioned, so that the length of the new pull rod is adjusted to be the same as that of the old pull rod.

[0028] 2、In the present application, the middle screw adjusting and fixing part is provided with an angle-adjustable fixed wrench, and when the nut is tightened after the length of the pull rod is adjusted, the middle screw is fixed to prevent rotation, the degree of freedom of the pull rod is limited, the pull rod adjusting efficiency is high, and the time of personnel is not consumed. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, various elements or parts are not necessarily drawn according to the actual proportion.

[0030] Figure 1A perspective view of the device of the present invention;

[0031] Figure 2 A perspective view of the device of the present invention Figure 1 An enlarged view of A in the present invention;

[0032] Figure 3 A perspective view of the device of the present invention Figure 1 An enlarged view of B in the present invention;

[0033] Figure 4 A perspective view of the device of the present invention

[0034] Figure 5 A perspective view of the device of the present invention.

[0035] 1-base, 2-old pull rod, 3-new pull rod, 4-fixed end screw positioning block, 5-first adjusting screw, 6-first supporting block, 7-second supporting block, 8-second adjusting screw, 9-first fixed pin, 10-second fixed pin, 11-ruler body, 12-measuring head, 13-limiting bolt, 14-fixing plate, 15-spring, 16-middle adjusting screw, 17-sliding groove, 18-supporting seat, 19-connecting plate, 20-first U-shaped pressing rod, 21-pressing column, 22-second U-shaped pressing rod, 23-pressing plate, 24-locking block, 25-screw rod, 26-sliding rod, 27-sliding block, 28-nut connecting seat, 29-fixed wrench, 30-connecting rod, 31-hand rotating disc, 32-positioning pin, 33-third supporting block, 34-arc-shaped groove, 35-bolt fixing block, 36-limiting plate, 37-ruler supporting seat, 38-cover plate, 39-triangular clamping block, 40-nut, 41-locking bolt, 42-rotary handle, 43-handles rope buckle. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In the description of the application, several meanings are one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If the terms "first", "second", "third" are described, they are only for the purpose of description and for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0039] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances. In addition, the technical features involved in different embodiments of the application described below can be combined with each other as long as they do not conflict with each other.

[0040] Embodiment 1

[0041] Please refer to Figures 1-5 A circuit breaker pull rod adjusting device, comprising a base 1 for supporting an old pull rod 2 and a new pull rod 3; a fixed end positioning part comprising a fixed end screw positioning block 4, the fixed end screw positioning block 4 positioning the first adjusting screw 5 of both the new pull rod 3 and the old pull rod 2; an adjusting end positioning part comprising a first support block 6 and a second support block 7; the first support block 6 is used to support the second adjusting screw 8 of the old pull rod 2, the second adjusting screw 8 on the old pull rod 2 is fixed on the base 1 through a first fixed pin 9, the second adjusting screw 8 on the new pull rod 3 is provided with a second fixed pin 10, the second fixed pin 10 can be slidably adjusted on the base 1; a vernier caliper, the vernier caliper comprises a scale body 11 and a measuring head 12, the scale body 11 is arranged between the first support block 6 and the second support block 7 along the direction of the pull rod extension, the measuring head 12 is slidably connected to the scale body 11, one side of the measuring head 12 is provided with a movable limit pin 13; a fixed plate 14 is arranged away from the vernier caliper, a resilient member is fixedly connected between the fixed plate 14 and the measuring head 12, the resilient member pulls the measuring head 12 to slide freely.

[0042] In the above scheme, the old circuit breaker pull rod (hereinafter referred to as old pull rod 2) and the new circuit breaker pull rod (hereinafter referred to as new pull rod 3) have the same structure, specifically including first adjusting screw 5 and second adjusting screw 8 at both ends and middle adjusting screw 16, and nut 40 is arranged between first adjusting screw 5 and middle adjusting screw 16 and between second adjusting screw 8 and middle adjusting screw 16, and the length of the pull rod can be adjusted by rotating middle adjusting screw 16, in work, fixed end screw positioning block 4 plays a fixing role in adjusting the two first adjusting screws of old pull rod 2 and new pull rod 3, and the second adjusting screw 8 at the other end of old pull rod 2 and new pull rod 3 is supported by first support block 6 and second support block 7, old pull rod 2 and new pull rod 3 are supported side by side above base 1 and are located on the same horizontal line, and the end of first adjusting screw 5 and second adjusting screw 8 is provided with a circular hole, and a lifting rope buckle 43 is further arranged on the four corners of base 1, which is convenient for binding the rope on the lifting rope buckle 43 and moving freely, and four supporting legs are further arranged at the four corners of the bottom.

[0043] In specific work, old pull rod 2 is put into the device as a whole, the circular hole at one end of first adjusting screw 5 of old pull rod 2 is put into the positioning pin 32 of the fixed end of the device, the second adjusting screw 8 at the other end of old pull rod 2 is the adjusting end, and the circular hole of the second adjusting screw 8 of old pull rod 2 is inserted into the first positioning pin 32 of the adjusting end; the limit pin on the vernier caliper is removed, the vernier caliper is in the elastic element, in the embodiment, the elastic element is two springs 15, the two springs 15 are pressed down after being resisted by the positioning pin 32 on old pull rod 2 under the tension, the zero key of the vernier caliper is pressed down, and the reference value of the length of old pull rod 2 is recorded. The vernier caliper measuring head 12 is pulled back, the length of new pull rod 3 is roughly adjusted to be consistent with that of old pull rod 2, then the circular hole at one end of first adjusting screw 5 of new pull rod 3 is put into the positioning pin 32 of the fixed end of the device, and the circular hole on the second adjusting screw 8 at the adjusting end is inserted into the first fixing pin 9 of the adjusting end; the limit pin 13 of the vernier caliper is loosened, the vernier caliper is resisted by the second fixing pin 10 of new pull rod 3, the middle adjusting screw 16 of the pull rod is rotated, the length of new pull rod 3 is adjusted according to the value on the vernier caliper, and when the value of the vernier caliper is zero, the length of new pull rod 3 is adjusted to be consistent with that of old pull rod 2; the clamping and fixing clamp for fixing the pull rod at both ends is closed, the angle of the middle fixing wrench 29 is adjusted, new pull rod 3 is fixed as a whole, then the nut 40 is tightened, and the length adjustment of new pull rod 3 is completed.

[0044] As a further embodiment, the bottom of new pull rod 3 is provided with a sliding groove 17, and the bottom end of second fixing pin 10 slides in the sliding groove 17. It can be understood that a limit seat corresponding to the second adjusting screw 8 of new pull rod 3 is fixed on base 1, and a sliding groove 17 is arranged on the limit seat, and when the vernier caliper is used to adjust new pull rod 3, the bottom end of second fixing pin 10 slides on the sliding groove 17, so as to realize the adjustment of the length of new pull rod 3.

[0045] As a further embodiment, the first adjusting screw 5 and the second adjusting screw 8 of the new pull rod 3 are both provided with a pressing part; the pressing part comprises a support seat 18, the top of the support seat 18 is provided with an inclined connecting plate 19, the top end of the inclined connecting plate 19 is rotationally connected with a first U-shaped pressing rod 20, the end of the first U-shaped pressing rod 20 is provided with a pressing column 21; the two sides of the first U-shaped pressing rod 20 are provided with a second U-shaped pressing rod 22, the bottom of the second U-shaped pressing rod 22 is rotationally connected with the bottom end of the inclined connecting plate 19; the middle of the second U-shaped pressing rod 22 is rotationally connected with a pressing plate 23, the other end of the pressing plate 23 is rotationally connected with the two side edges of the first U-shaped pressing rod 20 through a bolt. It can be understood that when the pressing part presses the second adjusting screw 8 of the new pull rod 3, the second U-shaped pressing rod 22 is first pushed down, and in the process of pushing, the pressing plate 23 plays a role of pressing down the first U-shaped pressing rod 20 through the bolt, so that the first U-shaped rod drives the pressing column 21 to press the first adjusting screw 5 and the second adjusting screw 8 after adjusting the length of the new pull rod 3, and then the nut 40 is fastened, and the length adjustment of the new pull rod 3 is completed

[0046] As a further embodiment, the base 1 is also provided with a middle screw adjusting and fixing part, which is located on one side of the new pull rod 3; the middle screw adjusting and fixing part comprises a locking block 24, a lead screw 25, a sliding rod 26, a sliding block 27, a nut 40 connecting seat 28 and a fixed wrench 29; the two ends of the lead screw 25 pass through two bearing seats and out of the locking block 24, a copper sleeve of the lead screw 25 is sleeved on the lead screw 25, the sliding rod 26 is arranged between the two bearing seats, the sliding block 27 is slidingly connected on the sliding rod, the connecting block is connected on the sliding block 27, the connecting block is fixedly connected with the copper sleeve of the lead screw 25, the nut 40 connecting seat 28 is connected with the copper sleeve of the lead screw 25, and the fixed wrench 29 is rotationally connected with the top of the nut 40 connecting seat 28 through a connecting rod 30; one end of the lead screw 25 located outside the base 1 is fixedly connected with a hand rotating disc 31. It can be understood that after the vernier caliper completes the length adjustment of the new pull rod 3, the hand rotating disc 31 is rotated, the lead screw 25 is rotated, the sliding block 27 on the lead screw 25 slides on the sliding rod, so that the nut 40 connecting seat 28 slides, so that the angle of the fixed wrench 29 is adjusted and fixed through the connecting rod 30, and after the length adjustment of the new pull rod 3 is completed, the new pull rod 3 is prevented from rotating when the nut 40 is rotated. In addition, a threaded hole is formed in the locking block 24 on the outside, the threaded hole is communicated to the position where the lead screw 25 passes through, a locking bolt 41 is threadedly connected in the threaded hole, and a rotating handle 42 is arranged on the locking bolt 41. The position of the locking bolt 41 in the threaded hole can be controlled to lock and unlock the lead screw 25.

[0047] As a further embodiment, the fixed end screw rod positioning block 4 is a U-shaped fixed block, a top of the U-shaped fixed block is provided with two fixing holes, and a positioning pin 32 corresponding to a round hole of the first adjusting screw rod 5 of the old draw bar 2 and the new draw bar 3 is inserted into each fixing hole. It can be understood that the U-shaped fixed block is used for fixing the positioning pin 32 to fix the first adjusting screw rod 5 of the old draw bar 2 and the new draw bar 3, so as to facilitate adjustment of the new draw bar 3 according to the length of the old draw bar 2.

[0048] As a further embodiment, the adjusting end positioning part further comprises a third supporting block 33, a top of the third supporting block 33 is provided with two arc-shaped grooves 34, and the two arc-shaped grooves 34 are used for supporting the first adjusting screw rod 5 of the old draw bar 2 and the new draw bar 3. It can be understood that the arc-shaped groove 34 is flush with the two protrusions of the U-shaped fixed block, the arc-shaped groove 34 and the contour of the first adjusting screw rod 5 are matched with each other, the first adjusting screw rod 5 of the two draw bars can be better fixed on the fixed end screw rod positioning block 4, and the length adjustment of the new draw bar 3 is well fixed.

[0049] As a further embodiment, a plug pin fixed block 35 is fixed on the base 1 on one side of the old draw bar 2, the plug pin fixed block 35 is provided with a sliding hole corresponding to the limiting plug pin 13, and the limiting plug pin 13 slides in the sliding hole. It can be understood that the plug pin fixed plate 14 is an L-shaped plate, one end of the L-shaped plate is fixed on an upper edge of the base 1, the other end of the L-shaped plate protrudes from a surface of the base 1, and the sliding hole is provided on one side of the L-shaped plate. When it is necessary to limit or release the measuring head 12 of the vernier caliper, the limiting plug pin 13 can be freely slid to achieve the purpose.

[0050] As a further embodiment, a limiting hole is provided on one side of the sliding hole, a protruding limiting plate 36 is provided on the limiting plug pin 13, the limiting plate 36 is clamped on the limiting hole and can freely slide in the limiting hole. It can be understood that the limiting plate 36 can slide in the limiting hole, so as to prevent the limiting plug pin 13 from sliding off the sliding hole, and the sliding distance of the limiting plug pin 13 can be more effectively controlled.

[0051] As a further embodiment, the bottom of the vernier caliper is provided with two spaced-apart measuring scale supporting seats 3718, the bottom of the measuring scale supporting seat 3718 is provided with a clamping groove, both ends of the ruler body 11 are clamped in the two clamping grooves respectively, and a cover plate 38 is provided on the connection between the measuring scale and the clamping groove. It can be understood that the measuring scale supporting seat 3718 can better support the measuring scale, and the cover plate 38 and the clamping groove are matched with each other, so as to better fix both ends of the ruler body 11 between the two measuring scale supporting seats 3718.

[0052] As a further embodiment, one end of the measuring head (12) is provided with a triangular clamping block (39), which can be clamped between the two first support blocks (6) and the second support block (7). It can be understood that the triangular clamping block can better clamp the measuring head (12) between the two support blocks, and also facilitate the clamping of the limiting bolt (13) on the triangular clamping block (39) to limit the sliding of the measuring head (12).

[0053] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A circuit breaker tie rod adjustment device, characterized by, include: The base (1) is used to support the old tie rod (2) and the new tie rod (3); The fixed end positioning part includes a fixed end screw positioning block (4), which positions the first adjusting screw (5) of both the new pull rod (3) and the old pull rod (2); The adjusting end positioning part includes a first support block (6) and a second support block (7); the first support block (6) is used to support the second adjusting screw (8) of the old pull rod (2), the second adjusting screw (8) on the old pull rod (2) is fixed to the base (1) by a first fixing pin (9), the second adjusting screw (8) on the new pull rod (3) is provided with a second fixing pin (10), and the second fixing pin (10) is slidably adjusted on the base (1); A vernier caliper, comprising a body (11) and a measuring head (12), wherein the body (11) is disposed between the first support block (6) and the second support block (7) along the extension direction of the pull rod, and the measuring head (12) is slidably connected to the body (11), and a movable limiting pin (13) is provided on one side of the measuring head (12); a fixing plate (14) is provided away from the vernier caliper, and an elastic element is fixedly connected between the fixing plate (14) and the measuring head (12), and the elastic element pulls the measuring head (12) to slide freely; Both the old tie rod (2) and the new tie rod (3) include a central adjusting screw (16), and a nut (40) is provided between the second adjusting screw (8) and the central adjusting screw (16). The base (1) is also provided with a central screw adjustment and fixing part, which is located on one side of the new pull rod (3); The middle screw adjustment and fixing part includes a locking block (24), a lead screw (25), a slide bar (26), a slider (27), a nut connecting seat (28), and a fixing wrench (29); The two ends of the lead screw (25) pass through two bearing seats and out of the locking block (24). A lead screw copper sleeve is fitted on the lead screw (25). A slide rod (26) is provided between the two bearing seats. A slider (27) is slidably connected to the slide rod (26). A connecting block is connected to the slider (27). The connecting block is fixedly connected to the lead screw copper sleeve. The nut connecting seat (28) is connected to the lead screw copper sleeve. The fixed wrench (29) is rotatably connected to the top of the nut connecting seat (28) through the connecting rod (30). The lead screw (25) is fixedly connected to a hand crank turntable (31) at one end outside the base (1).

2. The circuit breaker tie rod adjustment device of claim 1, wherein, The bottom of the new pull rod (3) is provided with a sliding groove (17); The bottom end of the second fixing pin (10) slides within the sliding groove (17).

3. The circuit breaker tie rod adjustment device of claim 1, wherein, The first adjusting screw (5) and the second adjusting screw (8) of the new pull rod (3) are both provided with clamping parts; The pressing part includes a support base (18), the top of the support base (18) is provided with a sloping connecting plate (19), the top of the sloping surface of the connecting plate (19) is rotatably connected to a first U-shaped pressure rod (20), and the end of the first U-shaped pressure rod (20) is provided with a pressure column (21). The two sides of the first U-shaped pressing rod (20) are provided with a second U-shaped pressing rod (22), and the bottom of the second U-shaped pressing rod (22) is rotationally connected with the bottom end of the inclined surface of the connecting plate (19). One end of the pressing plate (23) is rotationally connected with the middle of the second U-shaped pressing rod (22), and the other end of the pressing plate (23) is rotationally connected with the two side edges of the first U-shaped pressing rod (20) through a bolt.

4. The circuit breaker tie rod adjustment device of claim 1, wherein, The fixed-end screw positioning block (4) is a U-shaped fixed block, two fixing holes are formed in the top of the U-shaped fixed block, a positioning pin (32) corresponding to the circular hole on the first adjusting screw (5) of the old pull rod (2) is inserted into one of the fixing holes, and a positioning pin (32) corresponding to the circular hole on the first adjusting screw (5) of the new pull rod (3) is inserted into the other fixing hole.

5. The circuit breaker tie rod adjustment device of claim 4, wherein, The adjusting-end positioning part further comprises a third supporting block (33), and two arc-shaped grooves (34) are formed in the top of the third supporting block (33), and the two arc-shaped grooves (34) are respectively used for corresponding supporting the first adjusting screw (5) of the old pull rod (2) and the first adjusting screw (5) of the new pull rod (3).

6. The circuit breaker tie rod adjustment device of claim 1, wherein, A bolt fixing block (35) is fixed on the base (1) on one side of the old pull rod (2), and the bolt fixing block (35) is provided with a sliding hole corresponding to the limiting bolt (13), and the limiting bolt (13) slides in the sliding hole.

7. The circuit breaker tie rod adjustment device of claim 6, wherein, A limiting hole is formed in one side of the sliding hole, and a limiting plate (36) protruding from the limiting bolt (13) is clamped on the limiting hole and freely slides in the limiting hole.

8. The circuit breaker tie rod adjustment device of claim 1, wherein, The bottom of the vernier caliper is provided with two spaced-apart scale supporting seats (37), the top of the scale supporting seat (37) is provided with a clamping groove, the two ends of the blade (11) are clamped in the two clamping grooves respectively, and a cover plate (38) is arranged on the connecting position of the scale supporting seat (37) and the clamping groove.

9. The circuit breaker tie rod adjustment device of claim 1, wherein, One end of the measuring head (12) is provided with a triangular clamping block (39), and the triangular clamping block (39) is clamped between the two first supporting blocks (6) and the second supporting block (7). One end of the measuring head (12) is provided with a triangular clamping block (39), and the triangular clamping block (39) is clamped between the two first supporting blocks (6) and the second supporting block (7).

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