A draw-out type load switch-fuse combination

Abstract

The present invention discloses a trolley-type load switch fuse combination, which includes an operating mechanism body. On one side of the operating mechanism body, a T-shaped solid-sealed pole column is provided. The T-shaped solid-sealed pole column is connected in series above the main circuit of the operating mechanism body through an insulating sleeve with a moving contact installed. The bottom of the T-shaped solid-sealed pole column is connected with an arc extinguishing chamber. The top of the arc extinguishing chamber is connected with a horizontally arranged fuse tube. One end of the fuse tube is provided with a contact arm. The other end of the fuse tube is connected with a locking toggle arm through a fuse tube striker. The locking toggle arm is connected with the tripping half shaft on the operating mechanism body. The bottom of the arc extinguishing chamber is connected with an insulating pull rod through a flexible connection. The other end of the insulating pull rod is connected with a closing unit. The closing unit includes a transmission system and an energy storage system. The present invention overcomes the problems existing in the prior art, such as the existence of two types of fuse cabinets with inconsistent installation methods.

Description

Technical Field

[0001] The invention relates to the technical field of electrical switches, in particular to a trolley type load switch fuse combination. Background Art

[0002] Most of the existing load switch-fuse combination appliances are fixed structures, and are mostly used to protect factory transformers. However, due to the existence of two types of cabinets, fixed load switch cabinets and center-mounted circuit breaker cabinets, the installation methods are inconsistent and uncoordinated, which is not convenient for manufacturers to produce. In addition, fixed load switch-fuse combination appliances are inconvenient to maintain and overhaul. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the problems of the existence of two types of fuse cabinets and inconsistent installation methods in the prior art, and to provide a trolley-type load switch fuse combination that can be configured with a central cabinet.

[0004] The technical solution to solve the above problems is: a trolley-type load switch fuse combination, including an operating mechanism body, a T-shaped sealed pole is arranged on one side of the operating mechanism body, the T-shaped sealed pole is connected in series above the main circuit of the operating mechanism body through an insulating sleeve equipped with a moving contact, the bottom of the T-shaped sealed pole is connected to an arc extinguishing chamber, the top of the arc extinguishing chamber is connected to a horizontally arranged fuse tube, one end of the fuse tube is provided with a contact arm, the other end of the fuse tube is connected to a locking arm through a fuse striker, the locking arm is connected to the opening half-shaft on the operating mechanism body, the bottom of the arc extinguishing chamber is connected to an insulating pull rod through a soft connection, the other end of the insulating pull rod is connected to a closing unit, and the closing unit includes a transmission system and an energy storage system.

[0005] The present invention is also characterized in that:

[0006] The transmission system comprises a lever, one end of which is connected to an insulating pull rod, the other end of which is connected to a connecting plate, the connecting plate is connected to a main shaft through a crank arm, and the main shaft is connected to a spatial four-connecting plate mechanism.

[0007] One end of the lever close to the connecting plate is connected to a trip spring, and the other end of the trip spring is connected to the frame. A trip half-shaft and a buckle plate are provided in the frame. The trip half-shaft is fixed in the frame through a shaft sleeve, the buckle plate is fixed on the latch shaft, and the latch shaft is fixed in the frame through a copper sleeve.

[0008] The energy storage system includes a motor, a small sprocket is connected to the motor shaft of the motor through a one-way bearing, the small sprocket is connected to the turbine through the one-way bearing, the turbine and the worm are meshed to form a manual energy storage system, and manual electric clutch is realized through the one-way bearing.

[0009] The small sprocket is connected to the large sprocket through a chain. The large sprocket is installed on the energy storage shaft through a bearing. The large sprocket drives the clutch wheel through a retaining pin. The clutch wheel is connected to the energy storage shaft through a key. The rotation of the clutch wheel drives the rotation of the energy storage shaft, thereby driving the cam and the energy storage crank arm connected to the energy storage shaft through a key to rotate, thereby driving the closing spring to stretch. After the energy storage is in place, the clutch pin presses down the slider on the clutch wheel to achieve disengagement.

[0010] An insulating sleeve is sleeved outside the connection between the fuse tube and the contact arm. A plum blossom contact is arranged outside the contact arm, and a fuse clip is connected inside the contact arm.

[0011] A propulsion mechanism is connected to the bottom of the operating mechanism body.

[0012] A panel is arranged on the operating mechanism body. On the panel, there are closing and tripping buttons, a manual energy storage operation hole, a spring energy storage status indicator, and a closing and tripping indicator.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. It overcomes the defect that the fixed load switch cannot have both electrical interlock and mechanical interlock, providing a safety guarantee for ensuring continuous and reliable power supply.

[0015] 2. The present invention is produced in the form of a center-mounted handcart, and can be matched with a standard center-mounted cabinet type. Because the handcart is in the center, different forms of handcarts can be configured in the lower layer space, so as to realize the upper cabinet scheme.

[0016] 3. The overall dimensions of the present invention are exactly the same as those of the circuit breaker handcart with the same type of cabinet body. According to different loads, the handcarts can be completely interchanged, and no change is required for the cabinet body.

[0017] 4. The present invention adopts a handcart cabinet, that is, the faulty handcart can be pulled out of the cabinet alone for maintenance under the condition that the system is not powered off, while the fixed-type product needs to power off the system before maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0019] Figure 1 It is the main structural view of the present invention;

[0020] Figure 2 It is the side structural view of the present invention;

[0021] Figure 3 It is the main structural view of the closing unit of the operating mechanism of the present invention;

[0022] Figure 4 It is the side structural view of the closing unit of the operating mechanism of the present invention;

[0023] Figure 5Schematic diagram of the conductive circuit structure of the T-shaped pole column of the present invention.

[0024] Among them, 1. Operating mechanism body, 2. T-shaped solid-sealed pole column, 3. Fuse tube, 4. Insulating sleeve, 5. Fuse clip, 6. Contact arm, 7. Plum blossom contact, 8. Arc extinguishing chamber, 9. Flexible connection, 10. Insulating pull rod, 11. Panel, 12. Propelling mechanism, 13. Spatial four-link mechanism, 14. Tripping half shaft, 15. Buckle plate, 16. Motor, 17. Lever, 18. Link plate, 19. Tripping spring, 20. Large shaft, 21. Crank arm, 22. Frame, 23. Small sprocket, 24. Closing spring, 25. Energy storage crank arm, 26. Energy storage shaft, 27. Cam, 28. Large sprocket, 29. Slide block, 30. Clutch pin, 31. Clutch wheel, 32. Roller, 33. Holding detent, 34. Chain, 35. Worm, 36. Turbine, 37. Fuse tube striker, 38. Interlocking crank arm. Specific embodiments

[0025] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below with reference to specific drawings.

[0026] A handcart type load switch fuse combination of the present invention has a structure as Figures 1 to 5 shown, including an operating mechanism body 1. A T-shaped solid-sealed pole column 2 is arranged on one side of the operating mechanism body 1. The T-shaped solid-sealed pole column 2 is connected in series above the main circuit of the operating mechanism body 1 through an insulating sleeve with a moving contact. The bottom of the T-shaped solid-sealed pole column 2 is connected to an arc extinguishing chamber 8. The top of the arc extinguishing chamber 8 is connected to a horizontally arranged fuse tube 3. One end of the fuse tube 3 is provided with a contact arm 6. The other end of the fuse tube 3 is connected to an interlocking crank arm 38 through a fuse tube striker 37. The interlocking crank arm 38 is connected to the tripping half shaft 14 on the operating mechanism body 1. The bottom of the arc extinguishing chamber 8 is connected to an insulating pull rod 10 through a flexible connection 9. The other end of the insulating pull rod 10 is connected to a closing unit, and the closing unit includes a transmission system and an energy storage system.

[0027] The transmission system includes a lever 17. One end of the lever 17 is connected to the insulating pull rod 10. The other end of the lever 17 is connected to a link plate 18. The link plate 18 is connected to a large shaft 20 through a crank arm 21. The large shaft 20 is connected to a spatial four-link mechanism 13. One end of the lever 17 close to the link plate 18 is connected to a tripping spring 19. The other end of the tripping spring 19 is connected to the frame 22. A tripping half shaft 14 and a buckle plate 15 are arranged in the frame 22. The tripping half shaft 14 is fixed in the frame 22 through a bushing. The buckle plate 15 is fixed on the detent shaft. The detent shaft is fixed in the frame 22 through a copper bushing.

[0028] The energy storage system includes a motor 16, a small sprocket 23 is connected to the motor shaft of the motor 16 through a one-way bearing, the small sprocket 23 is connected to the turbine 36 through a one-way bearing, the turbine 36 is meshed with the worm 37 to form a manual energy storage system, and manual electric clutch is realized through the one-way bearing.

[0029] The small sprocket 23 is connected to the large sprocket 28 through a chain 34. The large sprocket 28 is installed on the energy storage shaft 26 through a bearing. The large sprocket 28 drives the clutch wheel 31 through a stop pin. The clutch wheel 31 is connected to the energy storage shaft 26 through a key. The rotation of the clutch wheel 31 drives the energy storage shaft 26 to rotate, thereby driving the cam 27 and the energy storage arm 25 connected to the energy storage shaft through a key to rotate, thereby driving the closing spring 24 to stretch. After the energy is stored in place, the clutch pin 30 presses down the slider on the clutch wheel 31 to achieve clutching. At this time, the latch 33 is kept against the roller 32 fixed on the clutch wheel 31 to keep the closing spring 24 in a stretched state.

[0030] An insulating sleeve 4 is sleeved on the outside of the connection between the melting tube 3 and the contact arm 6 , a plum blossom contact 7 is arranged on the outside of the contact arm 6 , and a melting clamp 5 is connected to the inside of the contact arm 6 .

[0031] The bottom of the operating mechanism body 1 is connected with a pushing mechanism 12, which can change the load switch fuse combination from a fixed unit to a trolley unit, so that the load switch fuse combination electrical appliance can smoothly enter the working position from the cabinet test position.

[0032] A panel 11 is provided on the operating mechanism body 1 , and the panel 11 is provided with closing and opening buttons, a manual energy storage operation hole, a spring energy storage state indicator plate, and a closing and opening indicator plate.

[0033] The invention discloses a trolley type load switch fuse combination, which has two energy storage modes: manual energy storage and electric energy storage. Manual energy storage can be used when there is no closing power supply.

[0034] The working principle is: insert the manual energy storage handle that is randomly equipped into the manual energy storage jack of the panel 11, and rotate the worm 35 clockwise, the worm drives the worm wheel 37 to rotate, the one-way bearing in the turbine locks the small sprocket to rotate clockwise, and the one-way bearing in the small sprocket unlocks the motor shaft, so that the electric energy storage part is separated, and the small sprocket 23 drives the large sprocket 28 to rotate, and the stop pin on the sprocket 28 drives the clutch wheel 31 fixedly connected to the energy storage shaft 26 to rotate, thereby driving the energy storage shaft 26 to rotate, driving the energy storage crank arm 26 on the energy storage shaft 26 to rotate, thereby lengthening the closing spring 24, and after energy storage is in place, the clutch pin 30 presses down the slider 29 on the clutch wheel to separate the large sprocket 28 from the clutch wheel 31 to achieve the purpose of energy storage.

[0035] During electric energy storage, the one-way bearing inside the small sprocket is locked with the motor shaft and rotates clockwise with the motor shaft. The one-way bearing inside the turbine is unlocked from the small sprocket, thus completing manual isolation. The energy storage process is similar. After the operating mechanism body 1 is energized, press the closing button or receive a closing signal, thereby releasing the constraint of the energy storage holding detent 33 on the energy storage shaft 26. The energy of the closing spring 24 is released, causing the closing cam 27 to rotate clockwise. The large shaft 20 is driven to rotate counterclockwise through the spatial four-bar mechanism 13, the connecting plate 18 is driven through the crank arm 21, the insulating pull rod 10 is driven through the lever mechanism 17, and finally the vacuum interrupter 8 is driven to move upward to complete the closing operation. When the medium-mounted hermetically sealed vacuum load switch is already in the closed position, the internal mechanical interlock ensures that the mechanism cannot be closed again.

[0036] After the closing operation is completed, press the opening button or receive an opening signal. The opening half shaft 14 rotates counterclockwise under the action of the tripping force, and the constraint of the opening half shaft 14 on the catch plate 15 is released. The main shaft 40 of the mechanism rotates clockwise under the action of the contact compression spring and the opening spring 19. The moving conductive rod of the vacuum interrupter 8 moves downward under the drive of the insulating railing 10, realizing the opening of the medium-mounted hermetically sealed vacuum load switch.

[0037] A circuit breaker-fuse combination of a trolley type according to the present invention combines a current-limiting fuse and a vacuum interrupter organically through a hermetically sealed pole column method to form a series circuit, and is combined into a combined load switch. The vacuum interrupter is responsible for closing and opening various load currents, and the current-limiting fuse is responsible for opening short-circuit currents.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A handcart type load switch fuse combination, comprising an operating mechanism body (1), characterized in that, A T-shaped sealed pole (2) is provided on one side of the operating mechanism body (1), and the T-shaped sealed pole (2) is connected in series to the top of the main circuit of the operating mechanism body (1) through an insulating sleeve equipped with a moving contact, and the bottom of the T-shaped sealed pole (2) is connected to an arc extinguishing chamber (8), and the top of the arc extinguishing chamber (8) is connected to a horizontally arranged melting tube (3), and one end of the melting tube (3) is provided with a contact arm (6), and the other end of the melting tube (3) is connected to a locking arm (38) through a melting tube striker (37), and the locking arm (38) is connected to a disconnecting half shaft (14) on the operating mechanism body (1), and the bottom of the arc extinguishing chamber (8) is connected to an insulating pull rod (10) through a flexible connection (9), and the other end of the insulating pull rod (10) is connected to a closing unit, and the closing unit includes a transmission system and an energy storage system; The transmission system comprises a lever (17), one end of the lever (17) is connected to the insulating pull rod (10), the other end of the lever (17) is connected to a connecting plate (18), the connecting plate (18) is connected to a large shaft (20) via a crank arm (21), and the large shaft (20) is connected to a spatial four-plate connecting mechanism (13); One end of the lever (17) close to the connecting plate (18) is connected to a switch-off spring (19), and the other end of the switch-off spring (19) is connected to a frame (22). A switch-off half-shaft (14) and a pinch plate (15) are arranged in the frame (22). The switch-off half-shaft (14) is fixed in the frame (22) via a shaft sleeve, and the pinch plate (15) is fixed on a shaft holding a latch (33). The latch shaft is fixed in the frame (22) via a copper sleeve. The energy storage system comprises a motor (16), a small sprocket (23) is connected to the motor shaft of the motor (16) via a one-way bearing, the small sprocket (23) is connected to a turbine (36) via a one-way bearing, the turbine (36) is meshed with a worm (35) to form a manual energy storage system, and manual electric clutch is realized via the one-way bearing; An insulating sleeve (4) is sleeved on the outside of the connection between the fusion tube (3) and the contact arm (6), a plum blossom contact (7) is arranged on the outside of the contact arm (6), and a fusion clamp (5) is connected to the inside of the contact arm (6); The small sprocket (23) is connected to the large sprocket (28) through a chain (34); the large sprocket (28) is installed on the energy storage shaft (26) through a bearing; the large sprocket (28) drives the clutch wheel (31) through a stop pin; the clutch wheel (31) is connected to the energy storage shaft (26) through a key; the clutch wheel (31) rotates to drive the energy storage shaft (26) to rotate, thereby driving the cam (27) and the energy storage arm (25) connected to the energy storage shaft through a key to rotate, thereby driving the closing spring (24) to stretch; after the energy is stored in place, the clutch pin (30) presses down the slider (29) on the clutch wheel (31) to achieve clutch; at this time, the latch (33) is kept against the roller (32) fixed on the clutch wheel (31) to keep the closing spring (24) in a stretched state.

2. The combined handcart type load switch and fuse according to claim 1, characterized in that, The bottom of the operating mechanism body (1) is connected to a propulsion mechanism (12).

3. The combination of a draw-out type load switch and a fuse according to claim 1, characterized in that, A panel (11) is provided on the operating mechanism body (1), and on the panel (11), there are closing and opening buttons, a manual energy storage operation hole, a spring energy storage status indicator board, and a closing and opening indicator board.

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