Distribution box external switch device and distribution box

Abstract

The utility model discloses an external switch device of a distribution box, which comprises a protective door and an internal switch, the side wall of the protective door is provided with a first chute, a push plate is slidably installed in the first chute, the push plate penetrates through the first chute, the top end of the push plate is fixedly provided with a first closing plate, and the top end of the first closing plate is fixedly provided with a second closing plate. The first closing plate is in sliding connection with the first through groove, and the push plate is arranged under the internally-connected switch. After the push plate below the internal switch is reset, tripping is not affected, when the internal switch needs to be closed manually, the internal switch can be closed through the closing assembly, and the first sliding groove can be closed under the action of the closing plate, so that the internal switch is prevented from being damaged. According to the power distribution box, external dust or other substances are prevented from entering the interior of the power distribution box through the first sliding groove, the internal switch can be smoothly and automatically tripped while external switching is realized, and the safety of external switching is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution boxes, in particular to an external switch device for a distribution box and a distribution box. Background Technique

[0002] The distribution box is a core component in the power system, playing a key role in power distribution, control, and protection. With the continuous progress of modern power technology, the design and manufacture of distribution boxes have become increasingly refined and intelligent.

[0003] Inside the distribution box, the air switch (also known as the automatic air circuit breaker) plays a crucial role. This switch can quickly cut off the current when abnormal situations such as overload, short circuit, or undervoltage occur in the circuit, thereby protecting the circuit and equipment from damage. The working principle of the air switch is based on the bimetallic strip inside it that thermally expands and bends to touch the lever, and the magnetic field generated by the induction coil pushes the lever to trip the circuit breaker. This design enables the air switch to perform excellently in terms of reaction speed and protection performance, so it is widely used in low-voltage distribution systems. In addition to the basic protection function, modern air switches can also be used in conjunction with modules such as leakage protectors and measuring instruments, greatly improving the safety and monitorability of the distribution system.

[0004] Normally, when the control switch is installed inside the distribution box, it is necessary to open the box door every time an operation is performed, which undoubtedly increases the inconvenience of use. However, if the switch is directly installed on the box door for the sake of operation convenience, new problems will arise. Due to the frequent opening and closing of the box door, the cable connecting the switch will be continuously bent, which will not only shorten the service life of the cable but also generate tiny cracks on the cable outer sheath, and then it is extremely easy to cause a short circuit in a humid or water-drenched environment. This will not only affect the normal operation of the switch equipment but also reduce the safety protection level of the entire distribution system and increase the safety risk. Therefore, how to ensure the durability of the cable and the safety of the system while guaranteeing operation convenience is an important issue that needs to be comprehensively considered in the design of the distribution box.

[0005] Patent document CN212751519U discloses an external switch device for a distribution box and a distribution box, including a box door, a knob, a main switch, a branch switch, a handle and a lock core. A support plate is installed in the box door, and a main switch is installed on the left side of the rear end of the support plate. Several branch switches are arranged in the support plate corresponding to the right side of the main switch. The front sides of the main switch and the branch switch are fixedly connected with a lifting block, and the front end of the lifting block is fixedly connected with a first paddle. Several knobs are installed below the rear end of the box door corresponding to the support plate, and the knobs are rotatably connected to the box door. The beneficial effect of the utility model is that after closing the box door, the first paddle and the second paddle are respectively stuck to the corresponding control switches. When adjusting and controlling, it is only necessary to control various switches or knobs on the box door without opening the box door, which is safer to use. Since the staff is in indirect contact with the switch device during control, it is safer to use, and no short circuit will be caused when the box door encounters water.

[0006] As in the prior art of the above patent, the structure of the above device is relatively complex, which brings considerable challenges to maintenance work. More importantly, it has a significant drawback: inside the distribution box, once an emergency such as current overload, line short circuit or ground fault occurs, although the leakage protector is designed to respond quickly and automatically trip to cut off the dangerous current, thereby protecting the circuit and connected equipment from damage, the first and second paddles controlled by the rotating handle shaft and transmission assembly of the above device to open and close the switch may fail at a critical moment. Especially when the switch is in the open state and an emergency occurs, the paddle may get stuck, causing the air switch to be unable to perform a normal tripping action. This situation will prevent the circuit from being cut off in time when facing an abnormality, which may cause fire, equipment damage or even electric shock accidents, posing a serious threat to personnel safety and the stability of the entire power system. Utility Model Content

[0007] The purpose of the utility model is to provide a switch device externally connected to a distribution box and a distribution box, so as to solve the above-mentioned deficiencies in the prior art.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an external switch device of a distribution box, comprising a protective door and an internal switch, the side wall of the protective door is provided with a first slide groove, a push plate is slidably installed inside the first slide groove, the push plate passes through the first slide groove, a first closing plate is fixedly installed on the top of the push plate, the first closing plate is slidably connected to the first through groove, the push plate is arranged directly below the internal switch, the side wall of the protective door is provided with a closing component, and the closing component is arranged directly above the internal switch.

[0009] As a further description of the above technical solution: a first through groove is opened at the top end of the first chute, a first spring is arranged inside the first through groove, and the bottom end of the first spring is fixedly connected to a first closing plate.

[0010] As a further description of the above technical solution: the closing assembly includes a second chute and a trigger plate. The second chute is opened on one side of the first chute. A pull plate is slidably installed inside the second chute. The bottom end of the pull plate is fixedly connected to a second closing plate. A second through groove is opened at the bottom end of the second chute. The second closing plate is slidably connected to the second through groove. A second spring is arranged inside the second through groove. The second spring is fixedly connected to the bottom end of the second closing plate. One end of the pull plate is fixedly connected to the trigger plate. The trigger plate is arranged directly above the internal switch.

[0011] A distribution box includes an external switch device and also includes a distribution box body. A plurality of switch connection seats are arranged inside the distribution box body. The plurality of internal switches are electrically connected to the plurality of switch connection seats. A hinge is arranged between the protection door and the distribution box body. The protection door is rotatably connected to the distribution box body through the hinge.

[0012] As a further description of the above technical solution: a plurality of heat dissipation holes are opened on the side wall of the distribution box body.

[0013] As a further description of the above technical solution: dust-proof nets are arranged inside the plurality of heat dissipation holes.

[0014] The utility model provides an external switch device for a distribution box, which has the following beneficial effects: when it is necessary to open the switch from the outside of the distribution box, push the push plate upward. While the push plate pushes the first closing plate upward, the end of the push plate close to the inside of the distribution box body pushes the internal switch. When it is pushed to the top end of the first chute, the opening of the internal switch is realized. Then the push plate and the first closing plate are reset. After the push plate below the internal switch is reset, it will not affect the tripping. When it is necessary to manually close the internal switch, the internal switch can be closed through the closing assembly. And the function of the closing plate can seal the first chute to prevent external dust or other substances from entering the distribution box through the first chute. The above device realizes the operation of the switch outside while enabling the internal switch to trip automatically smoothly, thereby increasing the safety of the external switch.

[0015] Since the external switch device for the distribution box has the above beneficial effects, the distribution box including the external switch device for the distribution box also has the above beneficial effects.

[0016] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0017] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of an external switch device and a distribution box proposed by the present utility model;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure from another perspective of the present utility model;

[0020] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the external switch device of the present utility model;

[0021] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the closing component of the present utility model;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure after closing the protective door of the present utility model;

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure inside the distribution box body of the present utility model;

[0024] Figure 7 It is a schematic diagram of the cross-sectional structure with a dust-proof net provided on the heat dissipation holes of the present utility model.

[0025] Legend Explanation:

[0026] 1. Distribution box body; 2. Heat dissipation holes; 3. Dust-proof net; 4. Switch connection seat; 5. Internal switch; 6. Hinge; 7. Protective door; 8. First sliding groove; 9. Push plate; 10. First closing plate; 11. First through groove; 12. First spring; 13. Second sliding groove; 14. Pulling plate; 15. Second closing plate; 16. Trigger plate; 17. Second through groove; 18. Second spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0028] Referring to Figure 1-7, a switch device externally connected to a distribution box, comprising a protective door 7 and an internally connected switch 5. A first sliding groove 8 is formed in the side wall of the protective door 7. A push plate 9 is slidably installed inside the first sliding groove 8. The push plate 9 penetrates through the first sliding groove 8. A first closing plate 10 is fixedly installed at the top end of the push plate 9. The first closing plate 10 is slidably connected to a first through groove 11. The push plate 9 is arranged directly below the internally connected switch 5. A closing assembly is arranged on the side wall of the protective door 7. The closing assembly is arranged directly above the internally connected switch 5; when it is necessary to open the switch from the outside of the distribution box, the push plate 9 is pushed upward. While the push plate 9 pushes the first closing plate 10 upward, the end of the push plate 9 close to the inside of the distribution box body 1 pushes the internally connected switch 5. When it is pushed to the top end of the first sliding groove 8, the opening of the internally connected switch 5 is realized. Then the push plate 9 and the first closing plate 10 are reset. After the push plate 9 below the internally connected switch 5 is reset, it will not affect the tripping. When it is necessary to manually close the internally connected switch 5, the internally connected switch 5 can be closed through the closing assembly. And the function of the closing plate can seal the first sliding groove 8 to prevent external dust or other substances from entering the inside of the distribution box through the first sliding groove 8. The above device realizes the external operation of the switch while enabling the internally connected switch 5 to trip automatically smoothly, increasing the safety of the external switch.

[0029] As a preferred technical solution of this embodiment, a first through groove 11 is formed at the top end of the first sliding groove 8. A first spring 12 is arranged inside the first through groove 11. The bottom end of the first spring 12 is fixedly connected to the first closing plate 10; the function of the first spring 12 is to provide a downward thrust for the first closing plate 10 to prevent the first closing plate 10 from getting stuck inside the first through groove 11 and ensure the smooth reset of the first closing plate 10 and the push plate 9.

[0030] As a preferred technical solution of this embodiment, the closing component includes a second sliding groove 13 and a trigger plate 16. The second sliding groove 13 is opened on one side of the first sliding groove 8. A pull plate 14 is slidably installed inside the second sliding groove 13. The bottom end of the pull plate 14 is fixedly connected to a second closing plate 15. A second through groove 17 is opened at the bottom end of the second sliding groove 13. The second closing plate 15 is slidably connected to the second through groove 17. A second spring 18 is arranged inside the second through groove 17. The second spring 18 is fixedly connected to the bottom end of the second closing plate 15. One end of the pull plate 14 is fixedly connected to the trigger plate 16. The trigger plate 16 is arranged directly above the internal switch 5. An air switch has a special design. When you apply an initial force to the air switch, you are actually triggering the spring assist mechanism inside it. These mechanisms are designed to assist the operating rod or handle to continue its movement trajectory until it trips completely after the initial trigger. This force causes the operating rod or handle of the switch to start moving, but it does not require continuous application of force. So when it is necessary to close the internal switch 5, only need to pull down the pull plate 14. The downward movement of the pull plate 14 drives the trigger plate 16. The trigger plate 16 presses down on the already opened internal switch 5. One end of the trigger plate 16 is spindle-shaped. When it touches the internal switch 5, it will give an initial lateral force to the internal switch 5, and thus the internal switch 5 can be closed.

[0031] A distribution box includes an external switch device and also includes a distribution box body 1. A plurality of switch connection seats 4 are arranged inside the distribution box body 1. A plurality of internal switches 5 are electrically connected to the plurality of switch connection seats 4. A hinge 6 is arranged between the protection door 7 and the distribution box body 1. The protection door 7 is rotatably connected to the distribution box body 1 through the hinge 6. The protection door 7 can protect the inside of the distribution box, and the internal switch 5 inside the distribution box can be directly opened and closed externally through the external switch device arranged on the protection door 7.

[0032] As a preferred technical solution of this embodiment, a plurality of heat dissipation holes 2 are opened on the side wall of the distribution box body 1. The working environment inside the distribution box is relatively hot and will generate a large amount of heat. The inside of the distribution box can be dissipated through the heat dissipation holes 2, which improves the heat dissipation performance of the device.

[0033] As a preferred technical solution of this embodiment, a dust-proof net 3 is arranged inside the plurality of heat dissipation holes 2. The dust-proof net 3 can prevent dust from entering the inside of the distribution box body 1 through the heat dissipation holes 2.

[0034] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. An external switch device for a distribution box, comprising a protective door (7) and an internal switch (5), characterized in that, A first chute (8) is formed in the side wall of the protective door (7), a push plate (9) is slidably installed inside the first chute (8), the push plate (9) penetrates through the first chute (8), a first closing plate (10) is fixedly installed at the top end of the push plate (9), the first closing plate (10) is slidably connected with a first through slot (11), the push plate (9) is arranged directly below the internal connection switch (5), and a closing assembly is arranged on the side wall of the protective door (7), and the closing assembly is arranged directly above the internal connection switch (5).

2. The external switch device of a distribution box according to claim 1, characterized in that, A first through slot (11) is formed at the top end of the first chute (8), a first spring (12) is arranged inside the first through slot (11), and the bottom end of the first spring (12) is fixedly connected with the first closing plate (10).

3. The external switch device for a distribution box according to claim 1, characterized in that The closing assembly includes a second chute (13) and a trigger plate (16), the second chute (13) is formed on one side of the first chute (8), a pull plate (14) is slidably installed inside the second chute (13), a second closing plate (15) is fixedly connected to the bottom end of the pull plate (14), a second through slot (17) is formed at the bottom end of the second chute (13), the second closing plate (15) is slidably connected with the second through slot (17), a second spring (18) is arranged inside the second through slot (17), the second spring (18) is fixedly connected with the bottom end of the second closing plate (15), one end of the pull plate (14) is fixedly connected with the trigger plate (16), and the trigger plate (16) is arranged directly above the internal connection switch (5).

4. A distribution box, comprising the external switch device of the distribution box according to any one of claims 1-3, characterized in that, It further includes a distribution box body (1), a plurality of switch connection seats (4) are arranged inside the distribution box body (1), a plurality of the internal connection switches (5) are electrically connected with the plurality of switch connection seats (4), a hinge (6) is arranged between the protective door (7) and the distribution box body (1), and the protective door (7) is rotatably connected with the distribution box body (1) through the hinge (6).

5. The distribution box according to claim 4, characterized in that, A plurality of heat dissipation holes (2) are formed in the side wall of the distribution box body (1).

6. A distribution box according to claim 5, characterized in that, A dust-proof net (3) is arranged inside the plurality of heat dissipation holes (2).

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