Built-in voltage transformer type high-voltage AC boundary high-voltage circuit breaker

Abstract

The utility model discloses a built-in voltage transformer type high-voltage alternating-current demarcation high-voltage circuit breaker, which belongs to the technical field of high-voltage circuit breakers and comprises a high-voltage circuit breaker body, the bottom of the high-voltage circuit breaker body is fixedly connected with a substrate, and the upper side wall of the substrate is fixedly connected with a protective shell. The high-voltage circuit breaker comprises a high-voltage circuit breaker body, the high-voltage circuit breaker body is located in a protective shell, a door plate is hinged to the front side wall of the protective shell, a circulating cold air mechanism is arranged on the protective shell, wire inlet notches are formed in the side walls of the two sides of the protective shell, and fixing mechanisms used for fixing cables are fixedly connected to the side walls, located on the outer sides of the wire inlet notches, of the protective shell. According to the utility model, the circulating cold air mechanism is arranged to carry out circulating cold air heat dissipation on the high-voltage circuit breaker body, the heat dissipation protection effect is better, the fixing mechanism is arranged to fix the cable, the stability of the connection between the cable and the wiring end of the high-voltage circuit breaker body is ensured, and the phenomenon that the wiring position falls off due to external force is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of high - voltage circuit breakers, in particular to a high - voltage AC boundary - dividing high - voltage circuit breaker with an in - built voltage transformer. Background Art

[0002] A high - voltage circuit breaker (or high - voltage switch) can not only cut off or close the no - load current and load current in a high - voltage circuit, but also cut off the overload current and short - circuit current through the action of a relay protection device when a system fault occurs.

[0003] In a Chinese patent for a high - voltage circuit breaker (patent number: CN218333519U), the device includes a high - voltage circuit breaker body. A bottom plate is arranged at the bottom of the high - voltage circuit breaker body. A vertical rod is fixedly connected to the top of the bottom plate. The top of the vertical rod is fixedly connected to a top plate located above the high - voltage circuit breaker body. A protective box sleeved outside the high - voltage circuit breaker body is arranged between the bottom plate and the top plate. A ventilation slot is opened in the middle of the top plate. A support rod is fixedly connected to the top of the top plate. Through the mutual cooperation of the bottom plate, the top plate and the protective box, the high - voltage circuit breaker body is preferably enclosed and protected, effectively avoiding the high - voltage circuit breaker body from being exposed for use, thereby avoiding its erosion by rainwater and direct collision by foreign objects, making it not easily damaged and increasing its service life. And through the mutual cooperation of the ventilation slot and the ceiling, the internal and external air can be better exchanged through the ventilation slot. And in a Chinese patent for a replaceable in - built voltage - transformer type high - voltage AC boundary - dividing circuit breaker (patent number: CN202749310U), it includes a circuit breaker body, a current transformer, and a voltage transformer. The current transformer is installed through the incoming - line terminal of the box body of the circuit breaker body. The voltage transformer is installed in the box body of the circuit breaker body. The secondary wiring between the voltage transformer and the circuit breaker body is located inside the box body. Three - phase incoming and outgoing line ends extending out are respectively arranged on both sides of the box body of the circuit breaker body. This device has a compact structure and small space occupation. It is not only convenient for packaging and transportation, reduces the installation of equipment brackets during the construction process, reduces costs, but also makes the construction process simpler and more efficient. However, the heat dissipation protection effect of this device on the high - voltage circuit breaker is average. A large amount of heat is generated when the high - voltage circuit breaker works, which poses a safety hazard. And the cable is directly connected to the wiring terminal of the high - voltage circuit breaker, and the connection part is not strengthened for protection, so the connection part is easily affected by external forces and falls off, affecting the stability of the circuit connection work. Summary of the Utility Model

[0004] Aiming at the above-mentioned existing technical deficiencies, the purpose of the present utility model is to provide a high-voltage AC boundary high-voltage circuit breaker with an in-built voltage transformer. By setting a circulating cold air mechanism and a fixing mechanism, the functions of circulating cold air cooling for the high-voltage circuit breaker body and fixing the cable to prevent it from getting off the line are realized; it solves the problems in the background technology that the heat dissipation protection effect of the device on the high-voltage circuit breaker is average, a large amount of heat is generated when the high-voltage circuit breaker works, there are safety hazards, and the cable is directly connected to the wiring terminal of the high-voltage circuit breaker, without strengthening the protection of the connection, and the connection is prone to falling off under the influence of external forces, affecting the stability of the circuit connection work.

[0005] To solve the above technical problems, the present utility model adopts the following technical solutions: The present utility model provides a high-voltage AC boundary high-voltage circuit breaker with an in-built voltage transformer, including: a high-voltage circuit breaker body, the bottom of the high-voltage circuit breaker body is fixedly connected with a base plate, the upper side wall of the base plate is fixedly connected with a protective shell, the high-voltage circuit breaker body is located in the protective shell, the front side wall of the protective shell is hingedly connected with a door panel, the protective shell is provided with a circulating cold air mechanism, and wire inlet slots are opened on both side walls of the protective shell. On the side walls of the protective shell outside the wire inlet slots, fixing mechanisms for fixing the cable are fixedly connected;

[0006] The circulating cold air mechanism includes a cooling cover communicated with the upper side wall of the protective shell, a refrigeration mechanism is arranged in the cooling cover, an induced draft fan is communicated with the upper end of the cooling cover, a tee pipe is communicated with the upper end of the induced draft fan, both ends of the tee pipe penetrate into the protective shell and are communicated with two cold air pipes, and air outlet openings are opened on one side of the cold air pipes close to the high-voltage circuit breaker body.

[0007] Preferably, the fixing mechanism includes a rectangular frame shell fixed outside the wire inlet slot, a hand wheel rod is inserted and rotatably connected to one side of the rectangular frame shell, one end of the hand wheel rod extends into the rectangular frame shell and is fixedly connected with a rotating rod, two driving bevel gears are fixedly connected to the rotating rod, both vertical end inner walls of the rectangular frame shell are rotatably connected with a bidirectional lead screw through bearing seats, a driven bevel gear meshed with the driving bevel gear is fixedly connected to the upper end of the bidirectional lead screw, two nut blocks are threadedly connected to the bidirectional lead screw, a connecting block is fixedly connected to one side of each of the two nut blocks, sliding openings are opened on the opposite inner walls of the rectangular frame shell, and fixing clamping plates are fixedly connected to both connecting blocks after passing through the sliding openings.

[0008] Preferably, symmetrically arranged arc-shaped grooves are opened on one side of each of the two fixing clamping plates opposite to each other.

[0009] Preferably, the inner wall of the rectangular frame shell is rotatably connected with the end of the rotating rod far from the hand wheel rod through a rotating member.

[0010] Preferably, the refrigeration mechanism includes a refrigerator and a refrigeration pole piece electrically connected to the refrigerator. The refrigerator is fixed to one side of the cooling cover, and the refrigeration pole piece is fixed in the cooling cover.

[0011] Preferably, the cold air duct is arranged in an S-shaped elbow structure, and the two cold air ducts are symmetrically fixed to the inner walls on both sides of the protective shell respectively.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, by setting up a circulating cold air mechanism and a refrigeration mechanism, when the refrigerator is started to work, the refrigeration pole piece is cooled, so that the gas in the cooling cover can be cooled. When the induced draft fan is started, the air in the high-voltage circuit breaker body is sucked into the cooling cover for refrigeration. Then, the air flow is respectively introduced into the two cold air ducts through the three-way pipe and blown out from the air outlet to the two sides of the high-voltage circuit breaker body for cold air heat dissipation, so that an internal cold air circulation is formed in the protective shell, and the cooling and heat dissipation effect is better, and it is less affected by the external environmental temperature.

[0014] 2. In the present utility model, by setting up a fixing mechanism, after the cable passes through the wire inlet slot and is connected to the wiring terminal of the high-voltage circuit breaker body, the hand wheel rod is rotated to drive the rotating rod to rotate. Since the two driving bevel gears are respectively engaged with the two driven bevel gears, the two bidirectional lead screws are driven to rotate synchronously. At this time, the two groups of nut blocks are forced to move towards each other, and then the two fixing clamping plates are driven to clamp the cable for fixation, which can ensure the stability of the connection between the cable and the wiring terminal of the high-voltage circuit breaker body and prevent the wiring from falling off due to external force. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model.

[0017] Figure 2 It is a front view sectional structure schematic diagram of the present utility model.

[0018] Figure 3 It is a three-dimensional structure schematic diagram of the circulating cold air mechanism in the present utility model.

[0019] Figure 4 It is a three-dimensional structure schematic diagram of the fixing mechanism in the present utility model.

[0020] Figure 5This is a schematic cross-sectional structure diagram of the fixing mechanism in the present utility model.

[0021] Explanation of reference numerals: 1 - High-voltage circuit breaker body, 2 - Substrate, 3 - Protective shell, 4 - Door panel, 5 - Cable inlet slot, 6 - Cooling cover, 7 - Induced draft fan, 8 - Three-way pipe, 9 - Cold air pipe, 10 - Air outlet, 11 - Rectangular frame shell, 12 - Handwheel rod, 13 - Rotating rod, 14 - Driving bevel gear, 15 - Bi-directional lead screw, 16 - Driven bevel gear, 17 - Nut block, 18 - Connecting block, 19 - Fixed clamping plate, 20 - Arc-shaped groove, 21 - Refrigerator, 22 - Refrigerating pole piece. Specific implementation mode

[0022] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1:

[0024] As Figures 1 to 3 shown, this embodiment provides a high-voltage AC boundary high-voltage circuit breaker with an in-built voltage transformer, including: a high-voltage circuit breaker body 1, the bottom of the high-voltage circuit breaker body 1 is fixedly connected to a substrate 2, the upper side wall of the substrate 2 is fixedly connected to a protective shell 3, the high-voltage circuit breaker body 1 is located in the protective shell 3, the front side wall of the protective shell 3 is hingedly connected to a door panel 4, a circulating cold air mechanism is provided on the protective shell 3, cable inlet slots 5 are opened on both side walls of the protective shell 3, and fixing mechanisms for fixing cables are fixedly connected to the side walls of the protective shell 3 outside the cable inlet slots 5. The high-voltage circuit breaker body 1 is arranged in the protective shell 3, which can form external protection and play a role in protecting against dust and rain.

[0025] The circulating cold air mechanism includes a cooling cover 6 communicated with the upper side wall of the protective shell 3, a refrigeration mechanism is arranged in the cooling cover 6, an induced draft fan 7 is communicated with the upper end of the cooling cover 6, a three-way pipe 8 is communicated with the upper end of the induced draft fan 7, both ends of the three-way pipe 8 penetrate into the protective shell 3 and are communicated with two cold air pipes 9, and air outlets 10 are opened on one side of the cold air pipes 9 close to the high-voltage circuit breaker body 1.

[0026] The refrigeration mechanism includes a refrigerator 21 and a refrigerating pole piece 22 electrically connected to the refrigerator 21. The refrigerator 21 is fixed on one side of the cooling cover 6, and the refrigerating pole piece 22 is fixed in the cooling cover 6. Starting the refrigerator 21 to work makes the refrigerating pole piece 22 refrigerate, which can refrigerate and cool the gas in the cooling cover 6, thereby improving the cooling and heat dissipation effect.

[0027] The cold air duct 9 is arranged in an S-shaped elbow structure. Two cold air ducts 9 are symmetrically fixed on the inner walls of both sides of the protective shell 3 respectively, so that the cold air duct 9 has a wide distribution area, and the cold air blows more comprehensively and evenly towards the high-voltage circuit breaker body 1, improving the heat dissipation effect.

[0028] Principle of this embodiment: When heat is generated during the operation of the high-voltage circuit breaker body 1 and heat dissipation is required, first, the refrigeration mechanism works to refrigerate the cooling cover 6, and the induced draft fan 7 is started to work. The air in the high-voltage circuit breaker body 1 is sucked into the cooling cover 6 for refrigeration. Then, the air flow is respectively introduced into the two cold air ducts 9 through the three-way pipe 8, and blows towards both sides of the high-voltage circuit breaker body 1 from the air outlet 10 for cold air heat dissipation, so that an internal cold air circulation is formed in the protective shell 3, and the cooling and heat dissipation effect is better, and it is less affected by the external environmental temperature.

[0029] Embodiment Two:

[0030] As Figure 4 and Figure 5 shown, on the basis of retaining all the technical features in the specific Embodiment One, in this embodiment: The fixing mechanism includes a rectangular frame shell 11 fixed outside the wire inlet slot 5. A handwheel rod 12 is inserted and rotatably connected to one side of the rectangular frame shell 11. One end of the handwheel rod 12 extends into the rectangular frame shell 11 and is fixedly connected to a rotating rod 13. Two driving bevel gears 14 are fixedly connected to the rotating rod 13. The inner walls of the two vertical ends of the rectangular frame shell 11 are both rotatably connected to a bidirectional lead screw 15 through bearing seats. The upper end of the bidirectional lead screw 15 is fixedly connected to a driven bevel gear 16 meshed with the driving bevel gear 14. Two nut blocks 17 are threadedly connected to the bidirectional lead screw 15. One side of each of the two nut blocks 17 is fixedly connected to a connecting block 18. Sliding openings are formed in the opposite inner walls of the rectangular frame shell 11. Both connecting blocks 18 penetrate through the sliding openings and are fixedly connected to fixing clamping plates 19.

[0031] Symmetrically arranged arc-shaped grooves 20 are formed on the opposite sides of the two fixing clamping plates 19, which are convenient for clamping and positioning the cables and separating the cables.

[0032] The inner wall of the rectangular frame shell 11 is rotatably connected to the end of the rotating rod 13 away from the handwheel rod 12 through a rotating member, making the rotation of the rotating rod 13 more stable.

[0033] Principle of this embodiment: When the cable passes through the wire inlet slot 5 and is connected to the wiring terminal of the high-voltage circuit breaker body 1, rotate the handwheel rod 12 to drive the rotating rod 13 to rotate. Since the two driving bevel gears 14 are respectively meshed with the two driven bevel gears 16, the two bidirectional lead screws 15 are driven to rotate synchronously. Since the bidirectional lead screw 15 is threadedly connected to the two nut blocks 17, at this time, the two nut blocks 17 are forced to move towards each other, and then drive the two fixing clamping plates 19 to clamp the cable for fixing, which can ensure the stability of the connection between the cable and the wiring terminal of the high-voltage circuit breaker body 1 and prevent the wiring from falling off due to external force.

[0034] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. Built-in voltage transformer type high voltage AC boundary high voltage circuit breaker, characterized in that: include: A high-voltage circuit breaker body (1), wherein a base plate (2) is fixedly connected to the bottom of the high-voltage circuit breaker body (1), a protective shell (3) is fixedly connected to the upper side wall of the base plate (2), the high-voltage circuit breaker body (1) is located in the protective shell (3), a door plate (4) is hingedly connected to the front side wall of the protective shell (3), a circulating cold air mechanism is provided on the protective shell (3), both side walls of the protective shell (3) are provided with wire inlet slots (5), and the side walls of the protective shell (3) located outside the wire inlet slots (5) are fixedly connected with fixing mechanisms for fixing cables; The circulating cold air mechanism comprises a cooling hood (6) connected to the upper side wall of the protective shell (3), a refrigeration mechanism is provided in the cooling hood (6), an upper end of the cooling hood (6) is connected to an induced draft fan (7), an upper end of the induced draft fan (7) is connected to a three-way pipe (8), both ends of the three-way pipe (8) penetrate into the protective shell (3) and are connected to two cold air pipes (9), and an air outlet (10) is provided on a side of the cold air pipe (9) close to the high-voltage circuit breaker body (1).

2. The built-in voltage transformer type high-voltage AC boundary high-voltage circuit breaker according to claim 1, characterized in that: The fixing mechanism comprises a rectangular frame shell (11) fixed to the outside of the wire inlet slot (5); a handwheel rod (12) is inserted and rotatably connected to one side of the rectangular frame shell (11); one end of the handwheel rod (12) extends into the rectangular frame shell (11) and is fixedly connected to a rotating rod (13); two active bevel gears (14) are fixedly connected to the rotating rod (13); two vertical end inner walls of the rectangular frame shell (11) are rotatably connected to a bidirectional screw rod (15) through a bearing seat; the upper end of the bidirectional screw rod (15) is fixedly connected to a driven bevel gear (16) meshingly connected to the active bevel gear (14); two nut blocks (17) are threadedly connected to the bidirectional screw rod (15); one side of the two nut blocks (17) is fixedly connected to a connecting block (18); sliding openings are opened on the inner walls of the two opposite sides of the rectangular frame shell (11); the two connecting blocks (18) penetrate the sliding openings and are fixedly connected to fixed clamping plates (19).

3. The built-in voltage transformer type high-voltage AC demarcation high-voltage circuit breaker according to claim 2, characterized in that: The two opposite sides of the two fixing clamping plates (19) are each provided with a symmetrically arranged arc-shaped groove (20).

4. The built-in voltage transformer type high-voltage AC demarcation high-voltage circuit breaker according to claim 2, characterized in that: The inner wall of the rectangular frame shell (11) is rotatably connected to an end of the rotating rod (13) away from the hand wheel rod (12) through a rotating member.

5. The built-in voltage transformer type high-voltage AC demarcation high-voltage circuit breaker according to claim 1, characterized in that: The refrigeration mechanism comprises a refrigerator (21) and a refrigeration pole piece (22) electrically connected to the refrigerator (21); the refrigerator (21) is fixed to one side of a cooling cover (6); and the refrigeration pole piece (22) is fixed in the cooling cover (6).

6. The built-in voltage transformer type high-voltage AC boundary high-voltage circuit breaker according to claim 1, characterized in that: The cold air pipe (9) is arranged in an S-shaped curved pipe structure, and the two cold air pipes (9) are symmetrically fixed on the inner walls of both sides of the protective shell (3).

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