Load breaking tool

Abstract

The utility model discloses a load on-off tool which comprises a shell sleeve, an outer shell is installed inside the shell sleeve, an inner pipe is movably connected inside the outer shell, a disconnecting mechanism is installed inside the inner pipe, a pull ring hook assembling mechanism is installed on the surface of the outer shell, the disconnecting mechanism comprises an installation head, and a hook assembling set is fixedly connected to the surface of the installation head. An inserting rod is mounted at the bottom of the mounting head, the surface of the inserting rod is sleeved with a limiting pipe, the surface of the limiting pipe is sleeved with a connecting sleeve, a spring is mounted at the bottom of the inserting rod, and a supporting rod is mounted at the bottom of the spring. The tool has the advantage of high efficiency, and solves the problems that in the using process of an existing load breaking tool, an electric power fuse on an insulator is inconvenient to disassemble and break a load quickly, maintenance and overhaul of an electric power worker are affected, and the load breaking efficiency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment disconnection, in particular to a load disconnection tool. Background Art

[0002] Load breaking tools are used to break power fuses or disconnectors that match box-type switchgear. They are lightweight and easy to carry. When used with disconnectors, drop-out fuses, power fuses, current-limiting fuses and box-type switchgear, load breaking tools can be used in overhead power distribution systems not higher than 34.5kV and cable power distribution systems not higher than 25kV.

[0003] The outdoor power distribution load-breaking tool with Chinese patent publication number CN103065886B includes a shell and a first reset spring. The main structural points are that a hook is arranged at the front end of the shell, one end of the first reset spring is fixed to the front end of the shell, the other end of the first reset spring is connected to a contact of the vacuum arc chamber, and the other contact of the vacuum arc chamber is connected to an energy storage device for closing and resetting the contacts of the vacuum arc chamber through a trip mechanism. The load-breaking tool is connected to a pull ring on the power equipment through two hooks, and the pull ring is moved by pulling the hook, and the pull ring drives the power equipment to move, so that the power equipment is separated from the disconnected load and the load current in the electrical equipment or system is safely cut off for maintenance, overhaul or other operations.

[0004] During use, the existing load disconnection tools are not convenient for quickly removing the power fuse on the insulator to disconnect the load, which affects the maintenance and overhaul of power workers and reduces the efficiency of load disconnection. Utility Model Content

[0005] The purpose of the utility model is to provide a load disconnecting tool with the advantage of high efficiency, which solves the problem that the existing load disconnecting tools are not convenient for quickly removing the power fuse on the insulator to disconnect the load during use, which affects the maintenance and repair of power workers and reduces the efficiency of load disconnection.

[0006] To achieve the above object, the utility model provides the following technical solution: a load breaking tool, comprising a shell, an outer shell is installed inside the shell, an inner tube is movably connected inside the outer shell, a disconnection mechanism is installed inside the inner tube, and a pull ring hook assembly mechanism is installed on the surface of the outer shell.

[0007] The disconnection mechanism comprises a mounting head, a hook assembly group is fixedly connected to the surface of the mounting head, a plug rod is mounted at the bottom of the mounting head, a limiting tube is sleeved on the surface of the plug rod, a connecting sleeve is sleeved on the surface of the limiting tube, a spring is mounted at the bottom of the plug rod, and a support rod is mounted at the bottom of the spring;

[0008] The pull ring hook assembly mechanism comprises a rotating seat, on which a bayonet pin and a connecting arm are rotatably connected respectively, and a spring hook is installed on the outer side of the connecting arm.

[0009] As a preferred load breaking tool of the utility model, the surface of the spring is movably connected to the inner wall of the limiting tube, and the surface of the connecting sleeve is connected to the inner wall of the inner tube.

[0010] As a preferred embodiment of the load breaking tool of the utility model, a connecting head is provided at the bottom of the support rod, and the connecting head is installed at the bottom of the inner cavity of the shell.

[0011] As a preferred embodiment of the load breaking tool of the utility model, the top of the connecting arm is movably connected to the surface of the hook assembly group.

[0012] As a preferred embodiment of the load breaking tool of the utility model, a connecting seat for mounting the insulating rod is provided at the bottom of the connecting arm.

[0013] As a preferred load breaking tool of the utility model, the right side of the bayonet penetrates into the inner cavity of the shell to limit the inner tube.

[0014] As a preferred embodiment of the load breaking tool of the utility model, a trigger is installed at the bottom of the inner cavity of the shell.

[0015] As a preferred load breaking tool of the utility model, a damping ring fixing seat is installed inside the shell, a damping ring and a sealing ring are arranged inside the damping ring fixing seat, and the damping ring and the sealing ring are sleeved on the surface of the inner tube.

[0016] As a preferred embodiment of the load breaking tool of the utility model, a conductive sheet is installed on the surface of the shell, and the conductive sheet is connected to the rotating seat.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. The utility model can quickly disassemble the power fuse through the coordinated use of the disconnecting mechanism and the pull-ring hook assembly mechanism, install the lifting ring of the power fuse in the spring hook, and install the lifting ring of the insulator on the hook assembly group. After the installation is completed, the connecting arm is rotated by the insulating rod, and the connecting arm drives the spring hook to rotate synchronously. During the rotation, the top of the connecting arm is movably connected with the bottom of the hook assembly group, and drives the hook assembly group to move upward, and the hook assembly group drives the installation head and the plug rod to move upward, and the plug rod drives the limit tube and the connecting sleeve to move upward, and the connecting sleeve drives the inner tube to move upward, so that the bayonet is separated from the surface of the inner tube. During the upward movement of the plug rod, the spring stretches upward to apply force to it, the support rod and the connecting head support the bottom of the spring, and the connecting head drives the outer shell and the shell sleeve to move downward, so that the disconnecting mechanism extends out of the shell sleeve. After the disconnecting mechanism extends out from the inside of the shell sleeve, it drives the power fuse to separate from the insulator to achieve load disconnection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front cross-sectional view of the utility model;

[0020] Figure 2 This is a schematic diagram of the pull ring hook assembly mechanism of the utility model;

[0021] Figure 3 This is a front sectional view of the disconnection mechanism of the utility model;

[0022] Figure 4 For this utility model Figure 1 A magnified view of middle;

[0023] Figure 5 For this utility model Figure 1 Enlarged view of B.

[0024] In the figure: 1. shell; 2. outer shell; 3. inner tube; 4. disconnection mechanism; 401. installation head; 402. hook assembly group; 403. spring; 404. support rod; 405. connector; 406. limit tube; 407. connecting sleeve; 408. plug rod; 5. pull ring hook assembly mechanism; 501. rotating seat; 502. connecting arm; 503. spring hook; 504. bayonet; 6. trigger; 7. conductive sheet; 8. damping ring; 9. sealing ring; 10. damping ring fixing seat. DETAILED DESCRIPTION

[0025] See also Figure 1-Figure 5 The load breaking tool comprises a shell 1, an outer shell 2 is installed inside the shell 1, an inner tube 3 is movably connected inside the outer shell 2, a disconnection mechanism 4 is installed inside the inner tube 3, and a pull ring hook assembly mechanism 5 is installed on the surface of the outer shell 2.

[0026] Further, the disconnection mechanism 4 includes a mounting head 401, a hook assembly group 402 is fixedly connected to the surface of the mounting head 401, a plug rod 408 is installed at the bottom of the mounting head 401, a limiting tube 406 is sleeved on the surface of the plug rod 408, a connecting sleeve 407 is sleeved on the surface of the limiting tube 406, a spring 403 is installed at the bottom of the plug rod 408, and a support rod 404 is installed at the bottom of the spring 403;

[0027] Furthermore, the pull ring hook assembly mechanism 5 includes a rotating seat 501 , on which a latch 504 and a connecting arm 502 are rotatably connected, respectively, and a spring hook 503 is installed on the outer side of the connecting arm 502 .

[0028] Furthermore, the surface of the spring 403 is movably connected to the inner wall of the limiting tube 406 , and the surface of the connecting sleeve 407 is connected to the inner wall of the inner tube 3 .

[0029] Furthermore, a connector 405 is provided at the bottom of the support rod 404 , and the connector 405 is installed at the bottom of the inner cavity of the shell 2 .

[0030] Furthermore, the top of the connecting arm 502 is movably connected to the surface of the hook assembly group 402, and the bottom of the connecting arm 502 is provided with a connecting seat for mounting the insulating rod.

[0031] Furthermore, the right side of the bayonet 504 penetrates into the inner cavity of the outer shell 2 to limit the inner tube 3 .

[0032] Furthermore, a conductive sheet 7 is installed on the surface of the shell 2 , the conductive sheet 7 is connected to the rotating seat 501 , and a trigger 6 is installed at the bottom of the inner cavity of the shell 2 .

[0033] By providing the conductive sheet 7, electrical conduction can be facilitated.

[0034] Furthermore, a damping ring fixing seat 10 is installed inside the shell 1 , a damping ring 8 and a sealing ring 9 are arranged inside the damping ring fixing seat 10 , and the damping ring 8 and the sealing ring 9 are sleeved on the surface of the inner tube 3 .

[0035] By using the damping ring 8 and the damping ring fixing seat 10 in combination, the resistance during the movement of the inner tube 3 can be increased to prevent the inner tube 3 from moving too fast. The sealing ring 9 increases the sealing of the connection between the inner tube 3 and the outer shell 2 to prevent water from entering the outer shell 2.

[0036] By using the disconnect mechanism 4 and the pull ring hook assembly mechanism 5 in coordination, the power fuse can be quickly disassembled, the lifting ring of the power fuse is installed in the spring hook 503, and the lifting ring of the insulator is installed on the hook assembly group 402. After the installation is completed, the connecting arm 502 is rotated by the insulating rod, and the connecting arm 502 drives the spring hook 503 to rotate synchronously. During the rotation process, the top of the connecting arm 502 is movably connected to the bottom of the hook assembly group 402, and drives the hook assembly group 402 to move upward, and the hook assembly group 402 drives the installation head 401 and the plug rod 408 When the rod 408 moves upward, the rod 408 drives the limiting tube 406 and the connecting sleeve 407 to move upward, and the connecting sleeve 407 drives the inner tube 3 to move upward, so that the latch 504 is separated from the surface of the inner tube 3. During the upward movement of the rod 408, the spring 403 stretches upward to exert force on it, and the support rod 404 and the connecting head 405 support the bottom of the spring 403. The connecting head 405 drives the outer shell 2 and the shell 1 to move downward, so that the disconnection mechanism 4 extends out of the shell 1. After the disconnection mechanism 4 extends out from the shell 1, it drives the power fuse to separate from the insulator to disconnect the load.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A load breaking tool, comprising a housing (1), an outer housing (2) installed inside the housing (1), an inner tube (3) movably connected inside the outer housing (2), a disconnection mechanism (4) installed inside the inner tube (3), and a pull ring hook assembly mechanism (5) installed on the surface of the outer housing (2), characterized in that: The disconnection mechanism (4) comprises a mounting head (401), a hook assembly group (402) is fixedly connected to the surface of the mounting head (401), an insertion rod (408) is mounted at the bottom of the mounting head (401), a limiting tube (406) is sleeved on the surface of the insertion rod (408), a connecting sleeve (407) is sleeved on the surface of the limiting tube (406), a spring (403) is mounted at the bottom of the insertion rod (408), and a support rod (404) is mounted at the bottom of the spring (403); The pull ring hook assembly mechanism (5) comprises a rotating seat (501), on which a latch (504) and a connecting arm (502) are rotatably connected, respectively, and a spring hook (503) is installed on the outer side of the connecting arm (502).

2. The load breaking tool according to claim 1, characterized in that: The surface of the spring (403) is movably connected to the inner wall of the limiting tube (406), and the surface of the connecting sleeve (407) is connected to the inner wall of the inner tube (3).

3. The load breaking tool according to claim 1, characterized in that: The bottom of the support rod (404) is provided with a connector (405), and the connector (405) is installed at the bottom of the inner cavity of the outer shell (2).

4. The load breaking tool according to claim 1, characterized in that: The top of the connecting arm (502) is movably connected to the surface of the hook assembly group (402).

5. The load breaking tool according to claim 1, characterized in that: A connecting seat for mounting the insulating rod is provided at the bottom of the connecting arm (502).

6. The load breaking tool according to claim 1, characterized in that: The right side of the bayonet (504) penetrates into the inner cavity of the outer shell (2) to limit the position of the inner tube (3).

7. The load breaking tool according to claim 1, characterized in that: A trigger (6) is installed at the bottom of the inner cavity of the shell (2).

8. The load breaking tool according to claim 1, characterized in that: A damping ring fixing seat (10) is installed inside the shell (1), a damping ring (8) and a sealing ring (9) are arranged inside the damping ring fixing seat (10), and the damping ring (8) and the sealing ring (9) are sleeved on the surface of the inner tube (3).

9. The load breaking tool according to claim 1, characterized in that: A conductive sheet (7) is installed on the surface of the housing (2), and the conductive sheet (7) is connected to the rotating seat (501).

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