A lifting trolley for testing high-voltage circuit breaker

Abstract

The present invention provides a lifting trolley for testing a high-voltage circuit breaker. The lifting trolley adopts manual adjustment through a first-level adjustment component. The adjustment component adopts a trapezoidal screw adjustment and a fixing ring is installed on the screw shaft. After the position adjustment is completed, the fixing ring is locked to tighten the trapezoidal screw. The lifting component adopts a scissor-type lifting structure, which can greatly save the space occupied by the lifting trolley and facilitate transportation. The second-level fine-tuning component adopts a double nut anti-skid method, which can effectively prevent the relative slip between the nut and the screw, and thus can effectively adjust the lifting and lowering of the screw. The fixing component is fixed with a spring-type screw, and the connection between the lifting trolley and the test platform is more firm, avoiding the change of the benchmark between the high-voltage circuit breaker and the test platform during testing. After the lifting trolley is disconnected from the circuit breaker, the screw can be completely reset under the action of the spring.

Description

Technical Field

[0001] The present invention relates to the field of intelligent testing and diagnosis of high-voltage circuit breakers, and more particularly to a lifting trolley for testing high-voltage circuit breakers. Background Art

[0002] High-voltage circuit breakers are among the most critical electrical equipment in power grids. They have the ability to interrupt and close load currents and, in the event of a fault, interrupt short-circuit currents. A high-voltage circuit breaker failure poses a serious threat to the safe and stable operation of the power grid, causing adverse social impacts and significant economic losses. Power grid accidents caused by high-voltage circuit breaker failures occur frequently annually. According to incomplete statistics on high-voltage circuit breaker operation accidents in power systems across China, failures to open (refusal to open) account for 22.67% of all accidents; failures to close (refusal to close) account for 6.48%; failures to open and close (open / close) account for 9.07%; failures to insulate (insulate) account for 35.47%; failures to malfunction (malfunction) account for 7.02%; failures to shut off (shutoff) account for 7.95%; and failures due to external forces and other factors account for 11.43%. Insulation and failures to open (refusal to open) are the most prominent, accounting for approximately 60% of all accidents. To ensure the operational reliability of high-voltage circuit breakers, electrical testing of circuit breakers is essential. During a large number of electrical tests, the circuit breaker needs to be transferred from the application platform to the intelligent test platform. At the same time, the high-voltage circuit breaker will vibrate slightly during the test. The lifting trolley of the present invention comes into being, which integrates transportation and positioning, and can well solve the above problems. Summary of the Invention

[0003] The invention provides a lifting trolley for testing a high-voltage circuit breaker. The device can reduce the labor intensity of test workers and improve test efficiency.

[0004] In order to achieve the above technical effects, the technical solutions of the present invention are as follows:

[0005] A lifting trolley for high-voltage circuit breaker testing includes a primary adjustment assembly, a lifting assembly, a secondary fine-tuning assembly, a circuit breaker platform assembly, a positioning assembly, and a fixing assembly; the lifting assembly is driven by the primary adjustment assembly, the secondary fine-tuning assembly is mounted on the lifting assembly, the circuit breaker platform assembly is mounted on the secondary fine-tuning assembly, and the positioning assembly and the fixing assembly are mounted on the circuit breaker platform assembly.

[0006] Furthermore, the first-level adjustment component includes a universal wheel, a support plate, a vertical plate, a fixed plate, a screw mounting seat, a movable plate, a screw nut, a screw, a handle, a handle fixing ring, and a supporting caster; the universal wheel is installed on the lower surface of the support plate, the vertical plate is installed on the left and right sides of the upper surface of the support plate, the screw mounting seat is installed on the front and rear sides of the upper surface of the support plate, the screw is connected to the screw mounting seat, the fixed plate and the movable plate are respectively at the two ends of the screw, the fixed plate is connected to the two ends of the vertical plate, the movable plate is connected to the screw nut, the two ends of the movable plate pass through the vertical plate and are connected to the supporting caster, the two ends of the movable plate and the vertical plate are connected by a shaft sleeve, the handle and the handle fixing ring are at the same end of the screw, the handle is connected to the screw, and the handle fixing ring is connected to the fixed plate.

[0007] Furthermore, the lifting assembly includes an active connecting rod, a follower connecting rod, a bearing retaining ring, a nut, a connecting rod, a support vertical plate, a support platform, a nut mounting hole, a connecting rod, and a support caster; the active connecting rod is connected to the movable plate through a bearing, and the bearing end cover is connected to the active connecting rod to ensure that the bearing and the active connecting rod become a whole, and then the positioning of the active connecting rod is achieved by positioning the bearing, the follower connecting rod is connected to the fixed plate through a bearing, the connecting rod and the active connecting rod are connected through a bearing, the bearing retaining ring is connected to the active connecting rod and the connecting rod respectively, the connecting rod is connected to the connecting rod through a bearing and fixed with a nut, the support vertical plate is connected to the connecting rod, and the support caster and the support vertical plate are used to support the support platform.

[0008] Furthermore, the secondary fine-tuning assembly includes a screw, a sleeve, an anti-slip nut, and an adjusting nut; the screw is a full-thread screw, one end of which is connected to the circuit breaker platform, and the other end is connected to the sleeve, the sleeve is connected to the sleeve mounting hole, the adjusting nut and the anti-slip nut are installed on the screw, and the anti-slip nuts are located at the upper and lower ends of the adjusting nut and lock the adjusting nut.

[0009] Furthermore, the circuit breaker platform assembly includes a profile bracket, a fixing assembly mounting hole, and a circuit breaker mounting platform; the profile bracket is mounted on the screw.

[0010] Furthermore, the positioning block structure is wedge-shaped, and the positioning block and the circuit breaker mounting platform are docked and positioned.

[0011] Furthermore, the fixing assembly includes a screw, a bearing support seat, a positioning ring, a handwheel, and a spring; the bearing support seat is connected to the profile bracket, the screw is connected to the bearing support seat, the positioning ring is fixed on the screw, the handwheel is connected to the screw, and the spring is located between the bearing support seat and the positioning ring.

[0012] Furthermore, the screw is a non-full-thread screw.

[0013] Furthermore, the fixing assembly mounting hole is a screw through hole.

[0014] Furthermore, the circuit breaker installation platform is a high-voltage circuit breaker positioning and fixing platform, on which a high-voltage circuit breaker positioning rib and a fixing rectangular square hole are provided.

[0015] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0016] The lifting trolley for testing high-voltage circuit breaker of the present invention is manually adjusted through a first-level adjustment component. The adjustment component adopts a trapezoidal screw adjustment and a fixing ring is installed on the screw shaft. After the position adjustment is completed, the fixing ring is locked to tighten the trapezoidal screw; the lifting component adopts a scissor-type lifting structure, which can greatly save the space occupied by the lifting trolley and facilitate transportation; the second-level fine-tuning component adopts double nuts to prevent relative slippage between the nut and the screw, and thus can effectively adjust the lifting and lowering of the screw; the fixing component is fixed with a spring-type screw, and the connection between the lifting trolley and the test platform is more firm, avoiding changes in the benchmark between the high-voltage circuit breaker and the test platform during testing; after the lifting trolley is disconnected from the circuit breaker, the screw can be completely reset under the action of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the first-level regulation component;

[0018] Figure 2 It is a schematic diagram of the lifting component structure;

[0019] Figure 3 It is a schematic diagram of the structure of the secondary fine-tuning component;

[0020] Figure 4 It is a schematic diagram of the circuit breaker platform component structure;

[0021] Figure 5 It is a schematic diagram of the positioning block structure;

[0022] Figure 6 It is a schematic diagram of the fixed component structure. DETAILED DESCRIPTION

[0023] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting this patent;

[0024] In order to better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size;

[0025] It is understandable to those skilled in the art that some well-known structures and descriptions thereof may be omitted in the drawings.

[0026] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0027] Example 1

[0028] A lifting trolley for high-voltage circuit breaker testing includes a primary adjustment assembly, a lifting assembly, a secondary fine-tuning assembly, a circuit breaker platform assembly, a positioning assembly, and a fixing assembly; the lifting assembly is driven by the primary adjustment assembly, the secondary fine-tuning assembly is mounted on the lifting assembly, the circuit breaker platform assembly is mounted on the secondary fine-tuning assembly, and the positioning assembly and the fixing assembly are mounted on the circuit breaker platform assembly.

[0029] like Figure 1 As shown, the first-level adjustment component includes a universal wheel 101, a support plate 102, a vertical plate 103, a fixed plate 104, a screw mounting seat 105, a movable plate 106, a screw nut 107, a screw 108, a handle 109, a handle fixing ring 110, and a supporting caster 111. The universal wheel 101 is installed on the lower surface of the support plate 102, the vertical plate 103 is installed on the left and right sides of the upper surface of the support plate 102, the screw mounting seat 105 is installed on the front and back sides of the upper surface of the support plate 102, the screw 107 is connected to the screw mounting seat 105, the fixed plate 104 and the movable plate 106 are respectively at the two ends of the screw 108, the fixed plate 104 is connected to the two ends of the vertical plate 103, the movable plate 106 is connected to the screw nut 107, and the two ends of the movable plate 106 pass through the vertical plate 103 and are connected to the supporting casters 102. The two ends of the movable plate 106 and the vertical plate 103 are connected by shaft sleeves. The handle 109 and the handle fixing ring 110 are at the same end of the screw 107, the handle 109 is connected to the screw 107, and the handle fixing ring 110 is connected to the fixed plate 110.

[0030] like Figure 2 As shown, the lifting assembly includes an active connecting rod 201, a follower connecting rod 202, a bearing retaining ring 203, a nut 204, a connecting rod 205, a supporting vertical plate 206, a supporting platform 207, a screw sleeve mounting hole 208, a connecting rod 209, and a supporting caster 210. The active connecting rod 201 is connected to the movable plate 106 through a bearing, and the bearing end cover 203 is connected to the active connecting rod 201 to ensure that the bearing and the active connecting rod 201 become a whole, and then the positioning of the active connecting rod is achieved by positioning the bearing. The follower connecting rod 202 is connected to the fixed plate 104 through a bearing, and the connecting rod 205 is connected to the active connecting rod through a bearing. The bearing retaining ring 203 is respectively connected to the active connecting rod 201 and the connecting rod 205. The connecting rod 209 is connected to the connecting rod 205 through a bearing and fixed with a nut 204. The supporting vertical plate 206 is connected to the connecting rod 205, and the supporting casters 210 and the supporting vertical plate 207 are used to support the supporting platform 207.

[0031] like Figure 3As shown, the secondary fine-tuning assembly includes a screw 301, a threaded sleeve 302, an anti-slip nut 303, and an adjustment nut 304. The screw 301 is a full-threaded screw, one end of which is connected to the circuit breaker platform 4 and the other end is connected to the threaded sleeve 302. The threaded sleeve 302 is connected to the threaded sleeve mounting hole 208. The adjustment nut 304 and anti-slip nut 303 are installed on the screw 301. The anti-slip nuts 303 are located at the upper and lower ends of the adjustment nut 304 and lock the adjustment nut.

[0032] like Figure 4 As shown, the circuit breaker platform assembly includes a profile bracket 401, a fixing assembly mounting hole 402, and a circuit breaker mounting platform 403. The profile bracket 401 is installed on the screw 301, the fixing assembly mounting hole 402 is a through hole of the screw 601, and the circuit breaker mounting platform 403 is a high-voltage circuit breaker positioning and fixing platform, on which there are high-voltage circuit breaker positioning retaining edges and fixing rectangular square holes.

[0033] like Figure 5 As shown, the positioning block 501 is wedge-shaped, and the positioning block 501 is docked and positioned with the installation platform.

[0034] like Figure 6 As shown, the fixing assembly includes a screw 601, a bearing support 602, a positioning ring 603, a handwheel 604, and a spring 605. The bearing support 602 is connected to the profile bracket 401, the screw 601 is connected to the bearing support 602, the positioning ring 603 is fixed to the screw 601, the handwheel 604 is connected to the screw 601, and the spring 605 is located between the bearing support 602 and the positioning ring 603. The screw 601 is a non-fully threaded screw. After the positioning block 501 is positioned, the handwheel 604 is rotated to connect the lifting trolley to the test platform through a threaded connection. After the test is completed, the threaded connection is disconnected, and the spring 605 will fully reset the screw 601.

[0035] The same or similar reference numerals correspond to the same or similar components;

[0036] The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0037] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A lifting trolley for testing high-voltage circuit breaker, characterized in that: It includes a primary adjustment component, a lifting component, a secondary fine-tuning component, a circuit breaker platform component, a positioning component, and a fixing component; the lifting component is driven by the primary adjustment component, the secondary fine-tuning component is installed on the lifting component, the circuit breaker platform component is installed on the secondary fine-tuning component, and the positioning component and the fixing component are installed on the circuit breaker platform component; The first-level adjustment assembly includes a universal wheel (101), a support plate (102), a vertical plate (103), a fixed plate (104), a screw mounting seat (105), a movable plate (106), a screw nut (107), a screw (108), a handle (109), a handle fixing ring (110), and a first supporting caster (111); the universal wheel (101) is mounted on the lower surface of the support plate (102), the vertical plate (103) is mounted on the left and right sides of the upper surface of the support plate (102), the screw mounting seat (105) is mounted on the front and rear sides of the upper surface of the support plate (102), and the screw (108) is connected to the screw mounting seat (105). The fixed plate (104) and the movable plate (106) are respectively located at the two ends of the screw (108), the fixed plate (104) is connected to the two ends of the vertical plate (103), the movable plate (106) is connected to the screw nut (107), the two ends of the movable plate (106) pass through the vertical plate (103) and are connected to the first supporting caster (111), the two ends of the movable plate (106) and the vertical plate (103) are connected by a shaft sleeve, the handle (109) and the handle fixing ring (110) are located at the same end of the screw (108), the handle (109) is connected to the screw (108), and the handle fixing ring (110) is connected to the fixed plate (104); The secondary fine-tuning assembly includes a screw rod (301), a screw sleeve (302), an anti-slip nut (303), and an adjusting nut (304); the screw rod (301) is a full-thread screw rod, one end of which is connected to the circuit breaker platform and the other end is connected to the screw sleeve (302); the screw sleeve (302) is connected to the screw sleeve mounting hole (208); the adjusting nut (304) and the anti-slip nut (303) are installed on the screw rod (301); the anti-slip nut (303) is located at the upper and lower ends of the adjusting nut (304) and locks the adjusting nut (304); The circuit breaker platform assembly comprises a profile bracket (401), a fixing assembly mounting hole (402), and a circuit breaker mounting platform (403); the profile bracket (401) is mounted on the screw rod (301); the circuit breaker mounting platform (403) is a high-voltage circuit breaker positioning and fixing platform, and is provided with a high-voltage circuit breaker positioning retaining edge and a fixing rectangular square hole; The fixing assembly comprises a screw (601), a bearing support seat (602), a positioning ring (603), a hand wheel (604), and a spring (605); the bearing support seat (602) is connected to the profile bracket (401), the screw (601) is connected to the bearing support seat (602), the positioning ring (603) is fixed on the screw (601), the hand wheel (604) is connected to the screw (601), and the spring (605) is located between the bearing support seat (602) and the positioning ring (603).

2. The lifting trolley for high-voltage circuit breaker testing according to claim 1, characterized in that: The screw (601) is a non-full-thread screw.

3. The lifting trolley for high-voltage circuit breaker testing according to claim 1, characterized in that: The lifting assembly comprises an active connecting rod (201), a follower connecting rod (202), a bearing retaining ring (203), a nut (204), a connecting rod (205), a supporting vertical plate (206), a supporting platform (207), a screw sleeve mounting hole (208), a connecting rod (209), and a second supporting caster (210); the active connecting rod (201) is connected to the movable plate (106) via a bearing, and the bearing retaining ring (203) is connected to the active connecting rod (201), ensuring that the bearing and the active connecting rod (201) become a whole, thereby achieving the desired effect by positioning the bearing. For positioning the active connecting rod, the follower connecting rod (202) is connected to the fixed plate (104) via a bearing, the connecting rod (205) is connected to the active connecting rod via a bearing, the bearing retaining ring (203) is connected to the active connecting rod (201) and the connecting rod (205) respectively, the connecting rod (209) is connected to the connecting rod (205) via a bearing and fixed with a nut (204), the supporting vertical plate (206) is connected to the connecting rod (205), and the second supporting caster (210) and the supporting vertical plate (206) are used to support the supporting platform (207).

Images