A short-size visual large-load arc extinguisher for live working

Abstract

The utility model discloses a short-sized visualized large-load arc extinguisher for live working, which relates to the field of live working maintenance of electric power, and comprises a fixed cylinder, the fixed cylinder is made of transparent insulating material, a short-sized vacuum arc extinguishing chamber is arranged in the fixed cylinder, a moving contact and a fixed contact are respectively provided at both ends of the short-sized vacuum arc extinguishing chamber in a sliding and sealing manner, a clamping head assembly for clamping a cable is provided at the end of the fixed cylinder, and the clamping head assembly is conductively connected to the fixed contact; a movable tube is slidably arranged in the fixed cylinder, and one end of the movable tube away from the clamping head assembly passes through the end of the fixed cylinder and is fixed with a pull ring. The beneficial effect is that by adopting a short-sized vacuum arc extinguishing chamber, the maximum value of the arc extinguisher's withstand voltage can be increased, and at the same time, the use of the short-sized vacuum arc extinguishing chamber no longer requires increasing the distance between the moving contact and the fixed contact, thereby significantly reducing the length of the arc extinguisher, reducing the pulling distance of the movable tube, and improving the convenience of operation.

Description

Technical Field

[0001] The utility model relates to the field of live-line power operation and maintenance, in particular to a short-size visual large-load arc extinguisher for live-line operation. Background Art

[0002] The basic principle of existing arc extinguishers is to achieve air insulation by increasing the distance between the moving contact and the fixed contact, and to achieve arc extinguishing by rapid closing; therefore, they cannot be opened and closed at high current and high load, are generally long, and the outdoor humidity and temperature have a great impact on their safety.

[0003] The disadvantages are: it is not convenient to use in some narrow space environments, such as the distance between the upper and lower wires is small, the original arc extinguisher is easy to overlap the live wire and short-circuit, causing accidents, and the internal circuit breaker pull rod needs to be pulled a long distance when the arc extinguisher is used, which is inconvenient for the staff to operate, and this type of arc extinguisher is not suitable for large current and high voltage, because the air between the moving contact and the fixed contact is easy to be broken down. In addition, due to the structural design of the existing arc extinguisher, some of the internal structures are not visible, and the internal opening and closing status cannot be checked. If the switch is unreliable, accidents are prone to occur. Utility Model Content

[0004] The purpose of the utility model is to provide a short-size visual large-load arc extinguisher in order to solve the above-mentioned problem, as described below.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a short-sized visualized large-load arc extinguisher, comprising a fixed cylinder, the fixed cylinder is made of transparent insulating material, a short-sized vacuum arc extinguishing chamber is arranged in the fixed cylinder, a moving contact is slidably arranged at one end of the short-sized vacuum arc extinguishing chamber, and a fixed contact is fixedly arranged at the other end, a clamping head assembly for clamping a cable is arranged at the end of the fixed cylinder, and the fixed contact of the clamping head assembly is conductively connected;

[0007] The surface of the short-size vacuum interrupter is provided with insulating sealant;

[0008] A movable tube is slidably arranged in the fixed tube, and one end of the movable tube away from the clamping head assembly passes through the end of the fixed tube and is fixed with a pull ring;

[0009] A connecting rod is slidably arranged in the movable tube, and the connecting rod is fixed to the moving contact. A contact assembly is arranged between the moving contact and the movable tube to increase the contact area between the moving contact and the movable tube.

[0010] A retaining ring is fixed on the end surface of the connecting rod, and the retaining ring corresponds to the end of the inner wall of the movable tube. The connecting rod is electrically connected to the conductive rod installed on the fixed cylinder through a wire;

[0011] The movable tube surface is sleeved with an opening and closing spring, the two ends of the opening and closing spring are respectively fixed to the movable tube and the fixed tube, the fixed tube is provided with a self-locking component, and the movable tube surface is provided with a card slot;

[0012] The self-locking assembly includes a latch penetrating through the fixed tube and used for cooperating with the latch slot to lock the movable tube.

[0013] By using the above-mentioned short-size visual large-load arc extinguisher for live working, the movable tube is moved outward from the fixed tube through the pull ring until the card slot of the movable tube is engaged with the card pin of the self-locking component, at which time the opening and closing spring will be compressed, and then the movable tube will be released and the movable tube will be in a stationary state;

[0014] When the inner wall end of the movable tube contacts the retaining ring, the movable tube drives the connecting rod to move through the retaining ring, and drives the moving contact to move through the connecting rod, so that the moving contact is separated from the fixed contact, thereby achieving circuit breaking;

[0015] Then, the clamping head assembly is connected to the cable, and the connecting wire is connected to the conductive rod. The fixing tube adopts a transparent design, so the position of the movable tube can be clearly seen, thereby ensuring that the connecting rod and the moving contact are in a pulled-apart state, ensuring that the arc extinguisher is circuit-breaking;

[0016] Release the self-locking assembly, and the movable tube will automatically enter the fixed tube under the action of the opening and closing spring. The moving contact will quickly approach the fixed contact and contact it under the combined action of the self-closing force of the short-sized vacuum interrupter and the opening and closing spring, thus closing the circuit.

[0017] Preferably, the clamping head assembly includes a conductor hook 1, which is fixed at the end of the fixed tube, and one end of the conductor hook 1 is fixedly connected to the fixed contact, and the other end of the conductor hook 1 is provided with a hook cap, the surface of the conductor hook 1 is threadedly connected with a top cap corresponding to the hook cap, the surface of the fixed tube is threadedly connected with a rotating sleeve, and the rotating sleeve is fixed to the top cap.

[0018] Preferably, the clamping head assembly comprises a second conductor hook, which is mounted on the fixed contact, a screw is threadedly connected to the second conductor hook, and a wire locking tongue is rotatably provided on the end of the screw corresponding to the second conductor hook.

[0019] Preferably, the self-locking component includes a trigger seat, which is arranged on a fixed tube, and a trigger is rotatably arranged on the trigger seat. A sliding groove is provided in the trigger seat, and a vertical pin is slidably provided in the sliding groove, and the pin passes through the fixed tube and contacts the surface of the movable tube, and a self-locking spring is provided in the sliding groove for pushing the pin to move it away from the sliding groove, and a groove is provided in the pin, and the trigger is inserted into the groove.

[0020] Preferably, a reset spring is sleeved on the surface of the moving contact, and two ends of the reset spring are respectively fixed to the moving contact and the short-sized vacuum interrupter.

[0021] Preferably, a strip-shaped opening is provided on the movable tube, and the wire passes through the strip-shaped opening.

[0022] Preferably, the retaining ring is clearance-matched with the inner wall of the movable tube.

[0023] Preferably, a safety cover is rotatably provided on the fixed cylinder to cover the self-locking component.

[0024] Preferably, the contact assembly is composed of a concave sleeve and a convex sleeve, both of which are conductors and have clearance fit, and the concave sleeve and the convex sleeve are respectively fixed on the movable tube and the surface of the moving contact.

[0025] Preferably, one end of the fixed cylinder away from the clamping head assembly is a conductive part, two annular finger contact springs are arranged in the conductive part, the surface of the movable tube is in contact with the finger contact springs, and the conductive part is conductively connected to the conductive rod.

[0026] The beneficial effects are:

[0027] 1. By adopting a short-sized vacuum interrupter, the maximum voltage that the arc extinguisher can withstand can be increased. At the same time, the use of a short-sized vacuum interrupter no longer requires increasing the distance between the moving contact and the fixed contact, thereby significantly reducing the length of the arc extinguisher, reducing the distance of the movable tube to be pulled out, and improving the convenience of operation;

[0028] 2. The inner wall end of the movable tube cooperates with the retaining ring to drive the connecting rod and the moving contact to move, so that the moving contact is separated from the fixed contact to achieve circuit breaking. The fixed tube adopts a transparent design, so the position of the movable tube can be clearly seen, thereby ensuring that the connecting rod and the moving contact are in a pulled-apart state, ensuring that the arc extinguisher is circuit-breaking, and the position of the contact assembly can be seen from the outside of the fixed tube. When the concave sleeve contacts the convex sleeve, it can be determined that the moving contact is in contact with the fixed contact. The short-size vacuum arc extinguishing chamber self-closing force and the opening and closing spring work together to ensure that the moving contact is smoothly reset and the circuit is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a front view structural diagram of the first embodiment of the utility model;

[0031] Figure 2 This is a schematic diagram of the front cross-sectional structure of the first embodiment of the utility model;

[0032] Figure 3 This is a schematic diagram of the cross-sectional structure of a circuit breaker in the first embodiment of the utility model;

[0033] Figure 4 This is a three-dimensional structural schematic diagram of the first embodiment of the utility model;

[0034] Figure 5 It is a three-dimensional structural schematic diagram of the second embodiment of the utility model.

[0035] The following are the descriptions of the reference numerals:

[0036] 1. Fixed cylinder; 2. Movable tube; 3. Conductive rod; 4. Clamping head assembly; 5. Safety cover; 6. Pull ring; 7. Opening and closing spring; 8. Wire; 9. Reset spring; 10. Moving contact; 11. Fixed contact; 12. Short-size vacuum interrupter; 13. Contact assembly; 14. Connecting rod; 15. Retaining ring; 16. Slot; 17. Strip opening; 18. Self-locking assembly; 19. Trigger; 20. Trigger seat; 21. Self-locking spring; 22. Bayonet; 23. Conductor hook 1; 24. Hook cap; 25. Top cap; 26. Rotating sleeve; 27. Conductor hook 2; 28. Screw; 29. ​​Wire locking tongue; 30. Contact finger spring; 31. Insulating sealant; 32. Conductive part. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0038] Embodiment 1:

[0039] See also Figure 1-Figure 5 As shown, the utility model provides a short-sized visualized large-load arc extinguisher for live working, including a fixed cylinder 1, the fixed cylinder 1 is a transparent insulating material, a short-sized vacuum arc extinguishing chamber 12 is arranged in the fixed cylinder 1, a moving contact 10 is slidably arranged at one end of the short-sized vacuum arc extinguishing chamber 12, and a fixed contact 11 is fixedly arranged at the other end. It should be noted that the ends of the moving contact 10 and the fixed contact 11 penetrate into the short-sized vacuum arc extinguishing chamber 12, and a clamping head assembly 4 for clamping a cable is arranged at the end of the fixed cylinder 1, and the clamping head assembly 4 is conductively connected to the fixed contact 11;

[0040] The short-size vacuum interrupter 12 is a prior art, and its interior is vacuum, which can solve the problem of the maximum value of the arc extinguisher carrying current being small due to air conductivity;

[0041] The surface of the short-size vacuum interrupter 12 is provided with an insulating sealant 31;

[0042] Because the shell length of the short-sized vacuum interrupter 12 is not enough, an insulating sealant 31 is arranged outside the short-sized vacuum interrupter 12 and connected to the fixing tube 1 as a whole. The insulating sealant 31 also has a shock-absorbing effect.

[0043] A movable tube 2 is slidably disposed in the fixed tube 1, and one end of the movable tube 2 away from the clamping head assembly 4 passes through the end of the fixed tube 1 and is fixed with a pull ring 6;

[0044] A connecting rod 14 is slidably disposed in the movable tube 2, and the connecting rod 14 is fixed to the moving contact 10. A contact assembly 13 is disposed between the moving contact 10 and the movable tube 2 to increase the contact area between the moving contact 10 and the movable tube 2.

[0045] The contact assembly 13 is composed of a concave sleeve and a convex sleeve. Both the concave sleeve and the convex sleeve are conductors and are clearance-matched. The concave sleeve and the convex sleeve are respectively fixed on the surface of the movable tube 2 and the moving contact 10.

[0046] The contact assembly 13 has two functions. On the one hand, it allows the user to intuitively see the relative position of the concave sleeve and the convex sleeve, thereby judging the relative position of the moving contact 10 and the fixed contact 11. At the same time, the design of the contact assembly 13 can improve the current carrying capacity between the connecting rod 14 and the moving contact 10.

[0047] A retaining ring 15 is fixed on the surface of the connecting rod 14, and the retaining ring 15 corresponds to the end of the inner wall of the movable tube 2. The connecting rod 14 is electrically connected to the conductive rod 3 installed on the fixed tube 1 through the wire 8;

[0048] The surface of the movable tube 2 is sleeved with an opening and closing spring 7, and the two ends of the opening and closing spring 7 are respectively fixed to the movable tube 2 and the fixed tube 1. The fixed tube 1 is provided with a self-locking component 18, and the surface of the movable tube 2 is provided with a card slot 16;

[0049] The self-locking assembly 18 includes a latch pin 22 that penetrates the fixed tube 1 and is used to cooperate with the latch slot 16 to lock the movable tube 2 .

[0050] As an optional embodiment, the clamping head assembly 4 includes a conductor hook 23, the conductor hook 23 is fixed to the end of the fixed cylinder 1, and one end of the conductor hook 23 is fixedly connected to the fixed contact 11, and the other end of the conductor hook 23 is provided with a hook cap 24, the surface of the conductor hook 23 is threadedly connected with a top cap 25 corresponding to the hook cap 24, the surface of the fixed cylinder 1 is threadedly connected with a rotating sleeve 26, and the rotating sleeve 26 is fixed to the top cap 25;

[0051] The top cap 25 is rotated by rotating the sleeve 26 to make the top cap 25 close to the hook cap 24. The top cap 25 cooperates with the hook cap 24 to clamp the cable.

[0052] The self-locking assembly 18 includes a trigger seat 20, which is arranged on the fixed tube 1, and a trigger 19 is rotatably arranged on the trigger seat 20. A slide groove is provided in the trigger seat 20, and a vertical bayonet 22 is slidably provided in the slide groove. The bayonet 22 passes through the fixed tube 1 and contacts the surface of the movable tube 2. A self-locking spring 21 is provided in the slide groove for pushing the bayonet 22 to keep the bayonet 22 away from the slide groove. A groove is provided in the bayonet 22, and the trigger 19 is inserted into the groove.

[0053] The trigger 19 is driven by the insulating rod to make the end of the trigger 19 tilt upward, thereby driving the latch 22 to move. After the latch 22 is disengaged from the slot 16, under the cooperation of the reset spring 9, the opening and closing spring 7 and the self-closing force of the short-sized vacuum arc extinguishing chamber 12, the moving contact 10 is reset and contacts the fixed contact 11 to achieve circuit closure.

[0054] A reset spring 9 is sleeved on the surface of the moving contact 10, and both ends of the reset spring 9 are respectively fixed to the moving contact 10 and the short-sized vacuum interrupter 12. The reset spring 9 can increase the speed of resetting the moving contact 10. Through the mutual cooperation of the reset spring 9, the opening and closing spring 7 and the self-closing force of the short-sized vacuum interrupter 12, the stability of the resetting of the moving contact 10 can be ensured.

[0055] The movable tube 2 is provided with a strip opening 17 through which the wire 8 passes. The provision of the strip opening 17 can reduce the distance that the wire 8 is pulled. Before the retaining ring 15 contacts the inner wall end of the movable tube 2, the wire 8 does not need to be moved.

[0056] The retaining ring 15 is clearance-matched with the inner wall of the movable tube 2 , which can improve the stability of the connecting rod 14 .

[0057] A safety cover 5 is rotatably provided on the fixed cylinder 1 to cover the self-locking component 18;

[0058] The safety cover 5 is provided to prevent the staff from accidentally touching the trigger 19 .

[0059] The end of the fixed tube 1 away from the clamping head assembly 4 is a conductive part 32, and two annular finger contact springs 30 are arranged in the conductive part 32. The surface of the movable tube 2 contacts the finger contact springs 30, and the conductive part 32 is conductively connected to the conductive rod 3.

[0060] Through the cooperation of the finger spring 30, the conductive part 32, the conductive rod 3 and the movable tube 2, the device forms a dual-channel conductive path, which can withstand large currents;

[0061] The current is increased by the conductive double circuit. By adopting a short-sized vacuum arc extinguishing chamber 12 and utilizing the principle that arcing in a vacuum is much smaller than arcing in air, the maximum voltage that the arc extinguisher can withstand can be increased. At the same time, the use of a short-sized vacuum arc extinguishing chamber no longer requires increasing the distance between the moving contact and the fixed contact, thereby significantly reducing the length of the arc extinguisher, reducing the pulling distance of the movable tube, improving the convenience of operation and expanding the scope of application.

[0062] Embodiment 2:

[0063] The only difference between this embodiment and the first embodiment is the specific implementation of the clamping head assembly 4.

[0064] The clamping head assembly 4 includes a second conductor hook 27 , which is mounted on the fixed contact 11 , and a screw 28 is threadedly connected to the second conductor hook 27 , and a locking tongue 29 is rotatably provided at the end of the screw 28 corresponding to the second conductor hook 27 .

[0065] The conductor hook 27 is hooked to the cable, and the screw 28 is rotated to drive the wire locking tongue 29 to approach the conductor hook 27. The conductor hook 27 cooperates with the wire locking tongue 29 to clamp the cable.

[0066] With the above structure, the movable tube 2 is moved outward from the fixed tube 1 through the pull ring 6 until the card slot 16 of the movable tube 2 is engaged with the card pin 22 of the self-locking assembly 18, at which time the opening and closing spring 7 will be compressed, and then the movable tube 2 will be released, and the movable tube 2 will be in a stationary state;

[0067] When the inner wall end of the movable tube 2 contacts the retaining ring 15, the movable tube 2 drives the connecting rod 14 to move through the retaining ring 15, and drives the moving contact 10 to move through the connecting rod 14, so that the moving contact 10 is separated from the fixed contact 11, and the circuit is disconnected;

[0068] Then, the clamping head assembly 4 is connected to the cable, and the connecting wire is connected to the conductive rod 3. The fixing tube 1 is transparent, so that the position of the movable tube 2 can be clearly seen, thereby ensuring that the connecting rod 14 and the moving contact 10 are in a pulled-apart state, ensuring that the arc extinguisher is disconnected;

[0069] Release the self-locking assembly 18, and the movable tube 2 will automatically enter the fixed tube 1 under the action of the opening and closing spring 7. The moving contact 10 will quickly approach the fixed contact 11 and contact it under the combined action of the self-closing force of the short-sized vacuum interrupter 12 and the opening and closing spring 7, thereby closing the circuit.

[0070] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A short-size visual large-load arc extinguisher for live working, characterized by: The invention comprises a fixed tube (1), wherein the fixed tube (1) is made of a transparent insulating material, a short-sized vacuum interrupter (12) is arranged inside the fixed tube (1), a moving contact (10) is slidably arranged at one end of the short-sized vacuum interrupter (12), and a fixed contact (11) is fixedly arranged at the other end, and a clamping head assembly (4) for clamping a cable is arranged at the end of the fixed tube (1), and the clamping head assembly (4) is conductively connected to the fixed contact (11); An insulating sealant (31) is provided on the surface of the short-sized vacuum interrupter (12); A movable tube (2) is slidably arranged in the fixed tube (1), and one end of the movable tube (2) away from the clamping head assembly (4) passes through the end of the fixed tube (1) and is fixed with a pull ring (6); A connecting rod (14) is slidably arranged in the movable tube (2), and the connecting rod (14) is fixed to the movable contact (10); a contact assembly (13) is arranged between the movable contact (10) and the movable tube (2) for increasing the contact area between the movable contact (10) and the movable tube (2); A retaining ring (15) is fixed on the end surface of the connecting rod (14), and the retaining ring (15) corresponds to the end of the inner wall of the movable tube (2). The connecting rod (14) is electrically connected to a conductive rod (3) installed on the fixed cylinder (1) through a conductive wire (8); The surface of the movable tube (2) is sleeved with an opening and closing spring (7), the two ends of the opening and closing spring (7) are respectively fixed to the movable tube (2) and the fixed tube (1), the fixed tube (1) is provided with a self-locking component (18), and the surface of the movable tube (2) is provided with a clamping groove (16); The self-locking component (18) comprises a latch (22) penetrating the fixed tube (1) and used for cooperating with the latch slot (16) to lock the movable tube (2).

2. According to claim 1, a short-size visual large-load arc extinguisher for live working, characterized in that: The clamping head assembly (4) comprises a conductor hook (23), wherein the conductor hook (23) is fixed to the end of the fixed cylinder (1), and one end of the conductor hook (23) is fixedly connected to the fixed contact (11), and the other end of the conductor hook (23) is provided with a hook cap (24), and the surface of the conductor hook (23) is threadedly connected to a top cap (25) corresponding to the hook cap (24), and the surface of the fixed cylinder (1) is threadedly connected to a rotating sleeve (26), and the rotating sleeve (26) is fixed to the top cap (25).

3. According to claim 1, a short-size visual large-load arc extinguisher for live working, characterized in that: The clamping head assembly (4) comprises a second conductor hook (27), the second conductor hook (27) being mounted on the fixed contact (11), a screw rod (28) being threadedly connected to the second conductor hook (27), and a wire locking tongue (29) being rotatably arranged at the end of the screw rod (28) corresponding to the second conductor hook (27).

4. According to claim 1, a short-size visual large-load arc extinguisher for live working, characterized in that: The self-locking assembly (18) comprises a trigger seat (20), wherein the trigger seat (20) is arranged on the fixed tube (1), and a trigger (19) is rotatably arranged on the trigger seat (20), wherein a slide groove is provided in the trigger seat (20), and a vertical bayonet (22) is slidably provided in the slide groove, and the bayonet (22) passes through the fixed tube (1) and contacts the surface of the movable tube (2), and a self-locking spring (21) is provided in the slide groove for pushing the bayonet (22) so that the bayonet (22) is away from the slide groove, and a groove is provided in the bayonet (22), and the trigger (19) is inserted into the groove.

5. According to claim 1, a short-size visual large-load arc extinguisher for live working, characterized in that: A reset spring (9) is sleeved on the surface of the moving contact (10), and two ends of the reset spring (9) are respectively fixed to the moving contact (10) and the short-sized vacuum interrupter (12).

6. According to claim 1, a short-size visual large-load arc extinguisher for live working, characterized in that: The movable tube (2) is provided with a strip-shaped opening (17), and the wire (8) passes through the strip-shaped opening (17).

7. According to claim 1, a short-size visual large-load arc extinguisher for live working, characterized in that: The retaining ring (15) is clearance-matched with the inner wall of the movable tube (2).

8. According to claim 1, a short-size visual large-load arc extinguisher for live working, characterized in that: A safety cover (5) is rotatably provided on the fixed cylinder (1) and is used to cover the self-locking component (18).

9. According to claim 1, a short-size visual large-load arc extinguisher for live working, characterized in that: The contact assembly (13) is composed of a concave sleeve and a convex sleeve. Both the concave sleeve and the convex sleeve are conductors and are clearance-matched. The concave sleeve and the convex sleeve are respectively fixed on the surfaces of the movable tube (2) and the movable contact (10).

10. The short-size visual large-load arc extinguisher for live working according to claim 1, characterized in that: One end of the fixed tube (1) away from the clamping head assembly (4) is a conductive part (32), two annular finger contact springs (30) are arranged in the conductive part (32), the surface of the movable tube (2) is in contact with the finger contact springs (30), and the conductive part (32) is conductively connected to the conductive rod (3).

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