Mechanical interlocking type high-voltage switch cabinet

Abstract

The invention discloses a mechanical interlocking type high-voltage switch cabinet, and relates to the field of high-voltage switch cabinets, the mechanical interlocking type high-voltage switch cabinet comprises a cabinet body equipped with a mechanical interlocking mechanism, the bottom of the cabinet body is provided with a transfer cavity, and the side surface of the transfer cavity and the top of the cabinet body are respectively provided with an air outlet and an air inlet; an exhaust fan and an air inlet fan are arranged at the air outlet and the air inlet respectively, and heat dissipation grooves are formed in the bottoms of the two sides of the cabinet body. According to the mechanical interlocking type high-voltage switch cabinet, through mutual cooperation of the supporting strip, the n-shaped plate, the sealing plate, the gas box, the first gas port and the second gas port, gas can be discharged from multiple sides of the inner wall of the cabinet body at the same time during forced cooling, so that the gas can be more fully diffused in the cabinet body; the front side of the cabinet body is provided with the drainage grooves, and the drainage grooves are more fully contacted with the electronic components in the cabinet body for heat exchange, so that the internal heat dissipation of the cabinet body can be accelerated under the cooperation of the drainage grooves formed in the front side, and the heat dissipation of the electronic components is more uniform while the heat dissipation effect is ensured.

Description

Technical Field

[0001] The present invention relates to high-voltage switchgear technology, and in particular to a mechanical interlocking high-voltage switchgear. Background Art

[0002] High-voltage switchgear is an important device for controlling and protecting high-voltage electrical equipment in the power system, and plays a key role in the power distribution and transmission process. With the continuous development of the power system and the increasing requirements for power supply reliability, higher standards have been put forward for the safety and operational specifications of high-voltage switchgear. In addition, in order to improve the safety of use, the existing high-voltage switchgear is equipped with left and right mechanical interlocking functions to meet the "five protection" standards. It can effectively prevent the accidental opening and closing of circuit breakers, prevent the closing of the switch with grounding, prevent the accidental entry into the energized interval, prevent the hanging of the ground wire under power, and prevent the pulling of the knife switch under load, thereby effectively reducing operational errors and reducing the risk of failure. For example, an outdoor floor-standing high-voltage boundary energy metering box with mechanical interlocking disclosed in announcement number CN112448305B and a mechanical interlocking device of an outdoor compact intelligent substation high-voltage switchgear disclosed in announcement number CN105186310B both meet the "five protection" standards of the cabinet by setting a mechanical interlocking mechanism.

[0003] High-voltage switchgear meets the "five protection" standards, which can reduce failures caused by human influence. However, during the long-term high-load operation of the high-voltage switchgear, its internal temperature continues to rise, causing the electronic components and wires inside the switchgear to be in a high-temperature environment for a long time, which will seriously reduce the service life of the electronic components and wires, and also greatly increase the risk of failure. Although fans are installed on the high-voltage switchgear for forced ventilation and heat dissipation, the fans are generally installed on the top and bottom sides. After the external gas enters the interior, it flows directly from top to bottom. Its diffusion range inside the high-voltage switchgear is small, which makes the cooling effect of local components inside the switchgear better, and the temperature of the rest of the parts drops relatively slowly, making it impossible to quickly achieve sufficient and efficient cooling inside the cabinet. Summary of the Invention

[0004] The object of the present invention is to provide a mechanical interlocking high-voltage switchgear to solve the above-mentioned deficiencies in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a mechanically interlocked high-voltage switchgear cabinet, comprising a cabinet equipped with a mechanical interlocking mechanism, a transfer cavity being defined at the bottom of the cabinet, an air exhaust port and an air inlet being provided on the side of the transfer cavity and the top of the cabinet, respectively, an exhaust fan and an air inlet being provided at the air exhaust port and the air inlet, respectively, and heat dissipation slots being provided at the bottoms of both sides of the cabinet; Support bars are symmetrically arranged on both sides of the inner wall of the cabinet, and Π-shaped plates are arranged on the support bars on both sides. A connecting cavity is formed between the Π-shaped plate and the inner wall of the cabinet, and a number of first air ports are opened on both sides and the top of the Π-shaped plate. A sealing plate is arranged between the end of the Π-shaped plate and the inner wall of the cabinet, and an air box is arranged on the back of the cabinet, and a connecting groove is formed between the air box and the surface of the cabinet, and the connecting groove is connected to the connecting cavity. A second air port connected to the connecting groove is opened on the inner wall of the cabinet, and a drainage groove is opened at the bottom of the inner wall of the cabinet.

[0006] Furthermore, the drainage groove is arranged on the bottom of the inner wall of the cabinet away from the second air port.

[0007] Furthermore, the sealing plate is fixedly connected to the Π-shaped plate, and the shape and size specifications of the sealing plate are adapted to the opening of the communicating cavity.

[0008] Furthermore, thread grooves are provided on the surface of the sealing plate and the side surfaces of the support bars, the inner side surfaces of the thread grooves are threadedly connected with locking bolts, the surface of the support bars are provided with guide grooves along their length, and guide bars are installed at the bottoms of both sides of the Π-shaped plate.

[0009] Furthermore, the longitudinal section of the guide groove is in the shape of a convex character, and the shape and size of the guide bar are compatible with the guide groove.

[0010] Furthermore, first dust filter plates are provided on both sides and the top of the Π-shaped plate. The bottom ends of the first dust filter plates on both sides are inclined away from the Π-shaped plate, and the first dust filter plate on the top is arranged in the shape of an arch bridge pile.

[0011] Furthermore, an operating port is provided on the surface of the gas box, a sealing door is provided at the operating port, the sealing door and the gas box are connected by bolts and nuts, a second dust filter plate is installed on the surface of the sealing door, and the bottom of the second dust filter plate is set to the side away from the sealing door.

[0012] Compared with the prior art, the mechanical interlocking high-voltage switchgear provided by the present invention has the following beneficial effects: 1. This mechanically interlocked high-voltage switchgear, through the mutual cooperation among the support bars, Π-shaped plates, sealing plates, gas boxes, and the first and second gas ports, allows gas to be discharged simultaneously from multiple sides of the inner wall of the cabinet during forced cooling, allowing it to diffuse more fully inside the cabinet and achieve more sufficient contact and heat exchange with the electronic components inside. Therefore, with the cooperation of the drainage grooves provided on the front side, the heat dissipation inside the cabinet can be accelerated, and while ensuring the heat dissipation effect, the heat dissipation of the electronic components is made more uniform.

[0013] 2. The mechanically interlocked high-voltage switchgear, through the provision of the first dust filter plate and the second dust filter plate, prevents dust mixed in the outside air from entering the cabinet during the forced process, thereby preventing a large amount of dust from adhering to the surface of the electronic components, thereby preventing their normal heat dissipation from being hindered. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 A schematic diagram of the internal structure of a cabinet provided in an embodiment of the present invention; Figure 3 The embodiment of the present invention provides Figure 2 A in the middle is an enlarged structural diagram; Figure 4 A schematic diagram of a partial cross-sectional structure of a cabinet provided by an embodiment of the present invention; Figure 5 The embodiment of the present invention provides Figure 4 The enlarged structural diagram at B in the middle; Figure 6 A schematic diagram of the partial structure of a Π-shaped plate provided in an embodiment of the present invention; Figure 7 Schematic diagram of the structure of the sealing plate, the Π-shaped plate and the first dust filter plate provided in an embodiment of the present invention; Figure 8 A schematic diagram of the support bar structure provided by an embodiment of the present invention; Figure 9 This is a structural diagram of the state where the sealing door and the cabinet body are separated, provided by an embodiment of the present invention.

[0016] Description of reference numerals: 1. Cabinet; 2. Transfer chamber; 21. Exhaust fan; 22. Inlet fan; 23. Heat dissipation slot; 24. Exhaust port; 25. Inlet port; 3. Support bar; 31. Π-shaped plate; 32. Connecting chamber; 33. First air port; 34. Closing plate; 35. Air box; 36. Connecting slot; 37. Second air port; 38. Drainage slot; 4. Threaded slot; 41. Locking bolt; 42. Guide slot; 43. Guide bar; 5. First dust filter plate; 51. Operation port; 52. Closing door; 53. Second dust filter plate. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Example: See also Figures 1-9 A mechanically interlocked high-voltage switchgear comprises a cabinet 1 equipped with a mechanical interlocking mechanism, a transfer chamber 2 being provided at the bottom of the cabinet 1, an exhaust port 24 and an air inlet 25 being provided on the side of the transfer chamber 2 and the top of the cabinet 1, an exhaust fan 21 and an air inlet fan 22 being provided at the exhaust port 24 and the air inlet 25, respectively, and heat dissipation slots 23 being provided at the bottom of both sides of the cabinet 1.

[0019] It should be noted that the inlet fan 22 is used to transport the normal temperature air flow from the outside to the inside of the cabinet 1, while the exhaust fan 21 is used to transport the air inside the cabinet 1 to the outside. Therefore, with the cooperation of the two, the air circulation speed inside the cabinet 1 can be accelerated, so that the heat dissipation speed inside the cabinet 1 is accelerated. This is existing technology and will not be repeated here.

[0020] In order to allow the outside air entering the cabinet 1 to be fully diffused and contact the electronic components inside for heat exchange, support bars 3 are symmetrically arranged on both sides of the inner wall of the cabinet 1, and Π-shaped plates 31 are arranged on the support bars 3 on both sides. A connecting cavity 32 is formed between the Π-shaped plate 31 and the inner wall of the cabinet 1, and a number of first air ports 33 are opened on both sides and the top of the Π-shaped plate 31. A sealing plate 34 is arranged between the end of the Π-shaped plate 31 and the inner wall of the cabinet 1. An air box 35 is arranged on the back of the cabinet 1, and a connecting groove 36 is formed between the air box 35 and the surface of the cabinet 1. The connecting groove 36 is connected to the connecting cavity 32, and a second air port 37 connected to the connecting groove 36 is opened on the inner wall of the cabinet 1. A drainage groove 38 is opened at the bottom of the inner wall of the cabinet 1.

[0021] It should be added that the drainage groove 38 is arranged on the side of the bottom of the inner wall of the cabinet 1 away from the second air port 37, so that after the external air flow enters the interior of the cabinet 1 from the first air port 33 and the second air port 37, it can continue to move forward under the action of its own initial velocity and fully diffuse inside the cabinet 1, and fully contact the electronic components inside it. At the same time, under the cooperation of the traction at the drainage groove 38, the air flow in the flow process is also subject to a certain degree of downward traction, so that it can flow to the bottom drainage groove 38 after diffusion, and finally be discharged to the external environment from the exhaust port 24.

[0022] It should be further explained that during operation, the traction force of the exhaust fan 21 on the airflow is smaller than the traction force of the inlet fan 22 on the airflow, so that the external normal temperature airflow delivered by the inlet fan 22 to the inside of the cabinet 1 can be fully diffused under the action of its initial velocity.

[0023] In this embodiment, the sealing plate 34 is fixedly connected to the Π-shaped plate 31, and the shape and size specifications of the sealing plate 34 are adapted to the cavity opening of the connecting cavity 32, so that the sealing plate 34 can effectively seal the cavity opening of the connecting cavity 32, so that the gas entering the connecting cavity 32 can only be discharged from the first gas port 33 to the interior of the cabinet 1.

[0024] In order to ensure the stability of the closing plate 34 and the Π-shaped plate 31 during operation, a threaded groove 4 is provided on the surface of the closing plate 34 and the side of the support bar 3. The inner side of the threaded groove 4 is threadedly connected with a locking bolt 41. The surface of the support bar 3 is provided with a guide groove 42 along its length direction, and guide bars 43 are installed on the bottom of both sides of the Π-shaped plate 31.

[0025] Moreover, the longitudinal section of the guide groove 42 is in the shape of a convex letter, and the shape and size of the guide bar 43 are adapted to the guide groove 42, so that after the guide bar 43 is embedded in the guide groove 42, it can provide a stable limiting force to the Π-shaped plate 31, so that it can form a stable connecting cavity 32 structure with the interior of the cabinet 1.

[0026] When working, the exhaust fan 21 and the inlet fan 22 cooperate to pull the internal airflow of the cabinet 1, so that the external air enters from the top of the cabinet 1, and the internal gas is discharged from the bottom; The external air flow enters the connecting cavity 32 and the connecting groove 36 under the traction of the inlet fan 22, and the air flow entering the two enters the interior of the cabinet 1 from the top of the inner wall of the cabinet 1 and the three sides away from the drainage groove 38. After entering the interior, it will continue to flow forward and fully diffuse, and fully contact and exchange heat with the electronic components inside the cabinet 1. The air flow after heat exchange flows downward into the transfer cavity 2 under the action of the traction force at the drainage groove 38, and is finally discharged to the external environment from the exhaust port 24 on the side of the cabinet 1.

[0027] In order to prevent the outside airflow from bringing in a lot of dust and interfering with the normal operation of the electronic components inside the cabinet 1, a first dust filter plate 5 is provided on both sides and the top of the Π-shaped plate 31, and an operation port 51 is provided on the surface of the air box 35. A sealing door 52 is provided at the operation port 51. The sealing door 52 is connected to the air box 35 by bolts and nuts, and a second dust filter plate 53 is installed on the surface of the sealing door 52.

[0028] In addition, the bottom ends of the first dust filter plates 5 on both sides are inclined away from the Π-shaped plate 31, the first dust filter plate 5 at the top is arranged in the form of an arch bridge pile, and the bottom of the second dust filter plate 53 is arranged away from the sealing door 52, so that the dust can move along the inclined surface of the first dust filter plate 5 and the surface of the second dust filter plate 53 during the flow of gas, so that it will not be attached to a single local position, making the gas circulation smoother.

[0029] It should be further explained that the heat dissipation slots 23 provided on both sides of the cabinet 1 are provided with dust-blocking nets, which can effectively reduce the external dust from entering the interior of the cabinet 1 from these locations.

[0030] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A mechanical interlocking high-voltage switchgear, comprising a cabinet body (1) equipped with a mechanical interlocking mechanism, characterized in that: A transfer chamber (2) is provided at the bottom of the cabinet (1), an air outlet (24) and an air inlet (25) are provided on the side of the transfer chamber (2) and the top of the cabinet (1), an exhaust fan (21) and an air inlet (22) are provided at the air outlet (24) and the air inlet (25), respectively, and heat dissipation slots (23) are provided at the bottom of both sides of the cabinet (1); Support bars (3) are symmetrically arranged on both sides of the inner wall of the cabinet (1), and Π-shaped plates (31) are arranged on the support bars (3) on both sides. A connecting cavity (32) is formed between the Π-shaped plate (31) and the inner wall of the cabinet (1). A plurality of first air ports (33) are provided on both sides and the top of the Π-shaped plate (31). A sealing plate (34) is provided between the end of the Π-shaped plate (31) and the inner wall of the cabinet (1). An air box (35) is provided on the back of the cabinet (1), and a connecting groove (36) is formed between the air box (35) and the surface of the cabinet (1). The connecting groove (36) is connected to the connecting cavity (32). A second air port (37) connected to the connecting groove (36) is provided on the inner wall of the cabinet (1), and a drainage groove (38) is provided at the bottom of the inner wall of the cabinet (1).

2. A mechanical interlocking high-voltage switchgear according to claim 1, characterized in that: The drainage groove (38) is arranged on the bottom of the inner wall of the cabinet (1) on a side away from the second air port (37).

3. The mechanical interlocking high-voltage switchgear according to claim 2, characterized in that: The sealing plate (34) is fixedly connected to the Π-shaped plate (31), and the shape and size of the sealing plate (34) are compatible with the opening of the communicating cavity (32).

4. The mechanical interlocking high-voltage switchgear according to claim 2, characterized in that: The surface of the sealing plate (34) and the side surface of the support bar (3) are both provided with a threaded groove (4), the inner side surface of the threaded groove (4) is threadedly connected to a locking bolt (41), the surface of the support bar (3) is provided with a guide groove (42) along its length direction, and the bottom of both sides of the Π-shaped plate (31) are both installed with a guide bar (43).

5. The mechanical interlocking high-voltage switchgear according to claim 5, characterized in that: The longitudinal section of the guide groove (42) is in the shape of a convex character, and the shape and size of the guide bar (43) are compatible with the guide groove (42).

6. The mechanical interlocking high-voltage switchgear according to claim 6, characterized in that: First dust filter plates (5) are provided on both sides and the top of the Π-shaped plate (31); the bottom ends of the first dust filter plates (5) on both sides are inclined away from the Π-shaped plate (31); and the first dust filter plate (5) on the top is arranged in the form of an arch bridge pile.

7. The mechanical interlocking high-voltage switchgear according to claim 6, characterized in that: An operating port (51) is provided on the surface of the gas box (35), a sealing door (52) is provided at the operating port (51), the sealing door (52) and the gas box (35) are connected by bolts and nuts, a second dust filter plate (53) is installed on the surface of the sealing door (52), and the bottom of the second dust filter plate (53) is arranged on a side away from the sealing door (52).

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