High voltage solid state soft start cabinet

Abstract

The application relates to the technical field of high-voltage starting cabinets, and discloses a high-voltage solid-state soft starting cabinet, which comprises a starting cabinet case, wherein an electronic component mounting area is arranged, and two wind control mechanisms, namely a wind control mechanism one and a wind control mechanism two, which are the same in structure but opposite in function, are arranged on the two sides of the area; each air inlet is subdivided into an air burst port and an air suction port; the air fan drives the air in the starting cabinet case to be discharged through the air suction port; a gas breaking piston is arranged in the air burst port; when the air flow rate in the air suction port is below a preset value, a control mechanism is activated to pull the gas breaking piston through reciprocating movement, so that the high-pressure gas is intermittently sprayed out of the air burst port along the path of the corresponding air suction port; the two wind control mechanisms, namely the wind control mechanism one and the wind control mechanism two, are ingeniously combined, the two wind control mechanisms are the same in structure but opposite in function, and are respectively responsible for air suction and air exhaust operations in opposite directions.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-voltage starting cabinet, more particularly, it relates to a high-voltage solid-state soft starting cabinet. BACKGROUND

[0002] The high-voltage solid-state soft starting device is a device for starting high-voltage alternating current motor, and its main components are a three-phase anti-parallel thyristor assembly connected between a power supply and a controlled motor and an electronic control device thereof. The high-voltage solid-state soft starting device is formed by a plurality of thyristors connected in series and parallel, and the size of the output voltage is controlled by controlling the triggering angle of the thyristor, so as to meet the different voltage and current requirements in the motor starting process. During the motor starting process, the high-voltage solid-state soft starting device increases the terminal voltage of the motor according to the pre-set starting curve, so as to accelerate the motor smoothly, thereby reducing the electrical and mechanical impact of the motor starting on the power grid, the motor and the connected equipment.

[0003] The traditional high-voltage solid-state soft starting cabinet often adopts a single heat dissipation mode, such as relying on natural convection or a single exhaust fan for heat dissipation. This mode often has low heat dissipation efficiency, especially in the case of high load or high ambient temperature, the heat in the cabinet is difficult to be effectively discharged, resulting in high temperature of the electronic parts, and further affecting the performance and service life thereof. Therefore, we propose a high-voltage solid-state soft starting cabinet. SUMMARY

[0004] The present application provides a high-voltage solid-state soft starting cabinet, which solves the technical problem that the heat in the cabinet is difficult to be effectively discharged in the related art single heat dissipation mode, resulting in high temperature of the electronic parts, and further affecting the performance and service life thereof.

[0005] The present application provides a high-voltage solid-state soft starting cabinet, which includes a starting cabinet cabinet, wherein an electronic part mounting area is arranged, and on both sides of the area, structure same but function opposite air guide mechanism one and air guide mechanism two are arranged, the two air guide mechanisms are respectively responsible for air suction and exhaust operation in opposite directions;

[0006] The air guide mechanism one and the air guide mechanism two both include a plurality of air ports distributed longitudinally, an exhaust fan and a control mechanism, each air port is subdivided into an air burst port and an air suction port, the exhaust fan works to drive the air in the starting cabinet cabinet to be discharged through the air suction port, the air burst port is provided with a gas breaking piston, when the air flow rate in the air suction port is below a preset value, the control mechanism is activated, the gas breaking piston is pulled by reciprocating motion, and the high-pressure gas is allowed to be intermittently sprayed along the path of the corresponding air suction port from the air burst port;

[0007] The air guide mechanism one and the air guide mechanism two alternately perform the air suction and exhaust actions, so as to promote the upward air flow generated in the cabinet to be discharged in the horizontal direction.

[0008] Further, the back of the starting cabinet is fixedly provided with a cabinet heat dissipation device, which is used for blowing air outside the starting cabinet into the inside of the starting cabinet to cool all parts in the electronic part mounting area of the starting cabinet, so that the air rises in the starting cabinet to take away the temperature emitted by the parts.

[0009] Further, the air exhaust mechanism one further comprises an air exhaust box fixed on the side wall cabinet of the starting cabinet, and a plurality of air exhaust fans are fixedly installed in the air exhaust box.

[0010] Further, the side of the air inlet of the air exhaust fan is provided with a connecting plate fixedly connected with the air exhaust box, and the side away from the air exhaust box of the connecting plate is fixedly connected with a vertical plate.

[0011] Further, the lower side of the corresponding connecting plate of the air exhaust mechanism one and the air exhaust mechanism two is provided with a protection pipe, and the air inlet is provided with a gas guide pipe.

[0012] Further, the inside of the burst port is fixedly provided with a burst chamber, the burst chamber is fixedly provided with a control column, the air inlet end of the air supply pipe is fixedly connected with an expansion air bag, and the expansion air bag corresponding to the air exhaust mechanism one is in communication with the gas guide pipe corresponding to the air exhaust mechanism two.

[0013] Further, the inside of the control column is fixedly provided with an inner control pipe, the inside of the end of the control column close to the air injection direction is provided with a gas leakage groove, and a gas cut-off piston is movably arranged in the gas leakage groove.

[0014] Further, the inside of the control column is fixedly provided with an inner control pipe, the inside of the end of the control column close to the air injection direction is provided with a gas leakage groove, and a gas cut-off piston is movably arranged in the gas leakage groove.

[0015] Further, the air surge control mechanism comprises a support frame fixed to the inner wall of the air inlet, a limiting ring fixed to the inner side of the support frame, a coil spring fixed to the inner side of the limiting ring, a vortex fan fixed to one side of the coil spring, and four extension plates evenly arranged on the blades of the vortex fan.

[0016] Further, the vortex fan is provided with a swing plate rotatably connected to the inner wall of the air inlet, and the swing plate is provided with a pull control wire fixed to the end of the swing plate.

[0017] The beneficial effects of the present application are:

[0018] The present application ingeniously combines two wind control mechanisms, namely wind control mechanism one and wind control mechanism two, which have the same structure but opposite functions, and are responsible for air suction and exhaust operations in opposite directions respectively. This design not only optimizes the air flow path inside the cabinet, but also significantly improves the heat dissipation efficiency. Through the alternating execution of air suction and exhaust actions by the wind control mechanisms, the rising air flow generated inside the cabinet can be effectively discharged in the horizontal direction, avoiding heat accumulation and local overheating.

[0019] Each wind control mechanism is equipped with an independent air surge port and air inlet, which can automatically activate the air surge control mechanism when the air flow rate decreases, release high-pressure gas for intermittent air surge, and further enhance the heat dissipation effect and dust removal capacity. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 is a schematic diagram of the partial front view structure of the start cabinet of the present application;

[0022] Figure 3 is a schematic diagram of the exhaust cabinet structure of the present application;

[0023] Figure 4 is a schematic diagram of the internal structure of the exhaust cabinet of the present application;

[0024] Figure 5 is a schematic diagram of the internal structure of the air port of the present application;

[0025] Figure 6 is a schematic diagram of the vortex fan structure of the present application;

[0026] Figure 7 is a schematic diagram of the internal structure of the air surge chamber of the present application;

[0027] Figure 8 is a schematic diagram of the Figure 7 enlarged view of position A in the present application;

[0028] Figure 9 Figure 1 is a schematic diagram of the internal structure of the control column of the present application.

[0029] In the figure: 11, start cabinet box; 12, cabinet heat dissipation part; 2, wind control mechanism one; 21, exhaust box; 22, vertical exhaust plate; 23, air outlet; 24, protection pipe; 25, burst port; 26, air inlet; 27, exhaust fan; 28, wind collection port; 29, air guide pipe; 201, connecting plate; 3, wind control mechanism two; 41, burst chamber; 42, air supply pipe; 43, inflatable air bag; 44, control column; 45, internal control pipe; 46, air release groove; 47, air release piston; 48, guide column; 49, push spring; 5, burst control mechanism; 51, turbofan part; 52, limiting ring; 53, coil spring part; 54, support frame; 55, pull control wire; 56, extension plate; 57, swing plate. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that discussions of these implementations are merely provided to enable those skilled in the art to better understand so as to be able to implement the subject matter described herein, and variations of elements discussed can be made by one skilled in the art, without departing from the scope of the present specification. Various processes or components can be omitted, substituted, or added according to desired implementations. Additionally, features described with respect to some examples can be combined in other examples.

[0031] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , a high-voltage solid-state soft start cabinet includes a start cabinet box 11, in which an electronic component mounting area is provided, and on both sides of the area, wind control mechanism one 2 and wind control mechanism two 3 are respectively arranged, which are the same structure but opposite functions, and the two wind control mechanisms are respectively responsible for air suction and exhaust operation in opposite directions.

[0032] The wind control mechanism one 2 and the wind control mechanism two 3 both include a plurality of air outlets 23, exhaust fans 27, and burst control mechanisms 5 distributed longitudinally, each air outlet 23 is subdivided into independent burst ports 25 and air inlets 26, the exhaust fans 27 work to drive the air inside the start cabinet box 11 to be discharged through the air inlets 26, the burst ports 25 are provided with air release pistons 47, when the air flow rate in the air inlets 26 falls below the preset value, the burst control mechanisms 5 are activated, and the air release pistons 47 are pulled through reciprocating motion, allowing high-pressure gas to be intermittently sprayed along the path corresponding to the air inlets 26 from the burst ports 25.

[0033] The wind control mechanism one 2 and the wind control mechanism two 3 alternately perform air suction and exhaust actions, so as to promote the upward airflow generated inside the cabinet to be discharged in the horizontal direction.

[0034] The back of the starting cabinet box 11 is fixedly provided with a box heat dissipation member 12, which is used for blowing air outside the starting cabinet box 11 into the inside of the starting cabinet box 11, cooling all parts in the electronic part mounting area of the starting cabinet box 11, and making the air flow upwards in the starting cabinet box 11 to take away the temperature emitted by the parts.

[0035] The air outlet mechanism one 2 further comprises an air outlet box 21 fixed on the side wall of the starting cabinet box 11, and a plurality of air outlet fans 27 are fixedly installed in the inside of the air outlet box 21. The air outlet direction of the air outlet fans 27 is from the inside of the starting cabinet box 11 to the outside, and an air inlet opening 28 is arranged at the center of one side of the air outlet fans 27, and the air inlet opening 28 is fixedly connected with the air outlet box 21.

[0036] A connecting plate 201 is arranged on the air inlet side of the air outlet fans 27, and the connecting plate 201 is fixedly connected with the air outlet box 21. A vertical plate 22 is fixedly connected with the side of the connecting plate 201 away from the air outlet box 21, and the vertical plate 22 is in communication with the air outlet box 21 through the connecting plate 201. A plurality of air inlets 23 are fixedly arranged on one side of the vertical plate 22, and the air inlets 26 are in communication with the inside of the vertical plate 22. A gas supply pipe 42 is arranged in the inside of the vertical plate 22.

[0037] The air outlet mechanism one 2 and the air outlet mechanism two 3 are provided with protection pipes 24 below the respective connecting plates 201. The air inlet opening 28 is provided with a gas guide pipe 29. The gas guide pipe 29 corresponding to the air outlet mechanism one 2 extends along the protection pipe 24 and is in communication with the gas supply pipe 42 corresponding to the air outlet mechanism two 3. Similarly, the gas guide pipe 29 corresponding to the air outlet mechanism two 3 also extends along the protection pipe 24 and is in communication with the gas supply pipe 42 corresponding to the air outlet mechanism one 2.

[0038] As shown in Figure 5 , Figure 6 , Figure 7 and Figure 9 , the inside of the air outlet opening 25 is fixedly provided with an air outlet chamber 41, and the inside of the air outlet chamber 41 is fixedly provided with a control column 44. The air inlet end of the gas supply pipe 42 is fixedly connected with an expansion air bag 43. The expansion air bag 43 corresponding to the air outlet mechanism one 2 is in communication with the gas guide pipe 29 corresponding to the air outlet mechanism two 3. Similarly, the expansion air bag 43 corresponding to the air outlet mechanism two 3 is in communication with the gas guide pipe 29 corresponding to the air outlet mechanism one 2.

[0039] The inside of the control column 44 is fixedly provided with an inner control pipe 45. A gas leakage groove 46 is formed in the inner side of one end of the inner control pipe 45 close to the air outlet direction of the control column 44. A gas cut-off piston 47 is movably arranged in the inner side of the gas leakage groove 46. The diameter of the gas cut-off piston 47 is larger than the diameter of the inner control pipe 45 and smaller than the diameter of the gas leakage groove 46.

[0040] The guide column 48 is arranged through the inside of the cut-off piston 47, and the two ends of the guide column 48 are fixedly connected with the inner control pipe 45. The cut-off piston 47 is in sliding connection with the guide column 48. The guide column 48 outside the side of the cut-off piston 47 close to the inflatable air bag 43 is sleeved with the push spring 49.

[0041] As shown in Figure 7 and Figure 8 , the control mechanism 5 comprises a support frame 54 fixed on the inner wall of the air inlet 26. The inner side of the support frame 54 is fixedly provided with a limiting ring 52. The inner side of the limiting ring 52 is fixedly provided with a coil spring 53. One side of the coil spring 53 is provided with a fan piece 51. The center axis of the fan piece 51 is fixedly connected with the center end of the coil spring 53. Four extension plates 56 are uniformly arranged on the blades of the fan piece 51.

[0042] One side of the fan piece 51 is provided with a swing plate 57 rotatably connected with the inner wall of the air inlet 26. The end of the swing plate 57 is fixedly provided with a pull control wire 55. The side of the pull control wire 55 away from the swing plate 57 is fixedly connected with the center position of the cut-off piston 47.

[0043] The electronic parts in the starting cabinet box 11 are installed in the electronic part installation area. When the starting cabinet box 11 normally operates, the air outside the starting cabinet box 11 is sucked into the inside of the starting cabinet box 11 through the work of the cabinet heat dissipation piece 12 to cool the parts in the electronic part installation area. Since the air inlet position of the cabinet heat dissipation piece 12 is in the lower half of the starting cabinet box 11, the air is in the upward airflow after entering and exiting the inside of the starting cabinet box 11 by the cabinet heat dissipation piece 12 to cool the parts in the electronic part installation area.

[0044] The respective corresponding exhaust fans 27 in the wind control mechanism one 2 and the wind control mechanism two 3 in the starting cabinet box 11 are alternately operated by the system control of the starting cabinet box 11 itself. When the exhaust fan 27 in the wind control mechanism one 2 operates, the exhaust fan 27 in the wind control mechanism two 3 stops operating.

[0045] When the exhaust fan 27 works to suck in the airflow, the airflow will drive the fan piece 51 to rotate clockwise when passing through the fan piece 51, so as to exert a winding force on the coil spring 53 through the center axis of the fan piece 51 until the maximum value of the coil spring 53. The fan piece 51 will also stop rotating under the airflow and remain in the maximum force state of the coil spring 53.

[0046] When the exhaust fan 27 in the air mechanism 1 2 is running, multiple air inlets 26 at different heights will suck the air in the height space of the electronic component installation area horizontally into the suction port 26, then into the longitudinal plate 22 through the connecting plate 201, and finally into the exhaust box 21 by the exhaust fan 27, and then blown out of the starting cabinet box 11 by the exhaust fan 27. Multiple longitudinal plates 22 are provided with multiple air inlets 26, thereby horizontally sucking the air in different spaces. On the one hand, the dust following the upward airflow is horizontally sucked into the air inlet 26 and finally discharged from the starting cabinet box 11. The upward airflow needs to pass through multiple layers of horizontal airflow suction from bottom to top, reducing the dust covering on the electronic components. On the other hand, the heat emitted by the electronic components is sucked away by the horizontal airflow, reducing the heat spreading upward along the upward airflow and reducing the impact on other height space components.

[0047] When the exhaust fan 27 in the air mechanism 1 2 is running, part of the air discharged will be blown into the air inlet 28, and then into the air supply pipe 42 in the air mechanism 2 3 along the air guide pipe 29, and finally into the inflatable air bag 43. The connection point between the inflatable air bag 43 and the air supply pipe 42 is connected by a one-way valve. As the air gradually enters the inflatable air bag 43, the inflatable air bag 43 gradually expands and gradually pressurizes.

[0048] At the same time, the corresponding exhaust fan 27 in the air mechanism 2 3 stops working, and the turbo fan 51 loses the impact of the airflow. The elastic band of the coil spring 53 drives the turbo fan 51 to rotate counterclockwise. When the turbo fan 51 rotates counterclockwise, the uniformly distributed extension plate 56 gradually pushes the swing plate 57 to swing. The swing plate 57 swings once to pull the pull control wire 55 once. The pull control wire 55 pulls the gas cut-off piston 47 to slide along the guide column 48, so that the high-pressure gas in the inflatable air bag 43 is instantly discharged from the gas leakage groove 46 and sprayed out through the control column 44. The instantaneously sprayed gas is sprayed out in the direction of the explosion outlet 25, impacting the horizontal airflow in this height space, instantaneously changing the suction airflow intensity of the air inlet 26 in the air mechanism 1 2, which is beneficial to removing the dust adsorbed on the surface of the components. The intermittent gas explosion is beneficial to impacting the dust on the surface of the components facing away from the suction direction of the air inlet 26 in the air mechanism 1 2.

[0049] The air mechanism 1 2 and the air mechanism 2 3 alternately perform the suction and exhaust actions, so that the upward airflow generated in the cabinet is effectively discharged in the horizontal direction. At the same time, the horizontal explosion airflow assists in removing the flying dust, ensuring the cleanliness of the cabinet internal environment and the effective heat dissipation of the electronic components.

[0050] Starting and heat dissipation: after the starting cabinet box 11 is started, the cabinet heat dissipation part 12 starts to work, sucking external air into the cabinet interior to cool the components in the electronic component installation area. The air flows upward in the cabinet interior, removing the heat emitted by the components.

[0051] Alternating operation of the air-removing mechanism: the system controls the air-removing fans 27 in the air-removing mechanism one 2 and the air-removing mechanism two 3 to operate alternately, when the air-removing fan 27 in one air-removing mechanism operates, the air-removing fan 27 in the other air-removing mechanism stops operating.

[0052] Air suction and air exhaust: the air-removing fan 27 in operation sucks in the air at different heights inside the cabinet through the air suction ports 26, and then enters the air exhaust box 21 through the vertical air exhaust plates 22 and the connecting plates 201, and finally is exhausted outside the cabinet by the air-removing fan 27. The multiple air suction ports 26 and the vertical air exhaust plates 22 ensure the horizontal suction of the air in different spaces, effectively reducing the dust covering and heat diffusion between electronic components.

[0053] High-pressure gas burst: part of the air exhausted by the air-removing mechanism in operation is blown into the air collection port 28, and then enters the inflatable air bag 43 in the other air-removing mechanism through the air guide pipe 29, so that the inflatable air bag 43 is gradually inflated and pressurized. When the air-removing fan in the other air-removing mechanism stops working, the turbo part 51 rotates counterclockwise under the driving of the coil spring part 53, pushes the swing plate 57 to swing through the extension plate 56, and then pulls the pull control wire 55 and the air cut-off piston 47 to slide. The sliding of the air cut-off piston 47 makes the high-pressure gas in the inflatable air bag 43 instantaneously sprayed from the air release groove 46 and the control column 44, forming a burst gas flow, which impacts the horizontally flowing air flow, and is beneficial to carrying away the dust on the surface of the components.

[0054] Alternation and circulation: the air-removing mechanism one 2 and the air-removing mechanism two 3 alternately perform the air suction and air exhaust actions, as well as the high-pressure gas burst, to ensure that the upward air flow generated inside the cabinet is effectively exhausted in the horizontal direction. Through this alternation and circulation, the internal environment of the cabinet is kept clean and the electronic components are effectively cooled.

[0055] The above describes the embodiments of the embodiments, but the embodiments are not limited to the specific embodiments described above, and the specific embodiments described above are only illustrative but not limiting. Those skilled in the art can make many forms under the inspiration of the embodiments, which are all within the protection scope of the embodiments.

Claims

1. A high voltage solid state soft starter cabinet, characterized in that, The application relates to a starting cabinet, which comprises the following parts: a starting cabinet box (11) provided with an electronic component mounting area, and air guide mechanism one (2) and air guide mechanism two (3) arranged on the two sides of the area respectively, wherein the two air guide mechanisms are provided with the same structure but opposite functions, and are responsible for air suction and air exhaust operations in opposite directions respectively; the air guide mechanism one (2) and the air guide mechanism two (3) each comprise a plurality of air outlets (23) distributed longitudinally, an air exhaust fan (27) and a control mechanism (5), each of the air outlets (23) is subdivided into an air burst outlet (25) and an air suction outlet (26), the air exhaust fan (27) is driven to work to exhaust the air in the starting cabinet box (11) through the air suction outlet (26), when the air flow rate in the air suction outlet (26) is below a preset value, the control mechanism (5) is activated to pull the air burst outlet (25) through reciprocating motion, and the high-pressure gas is allowed to be intermittently sprayed from the air burst outlet (25) along a path corresponding to the air suction outlet (26); the air guide mechanism one (2) and the air guide mechanism two (3) alternately perform air suction and air exhaust operations, so that the upward air current generated in the cabinet is exhausted in the horizontal direction; an air burst chamber (41) is fixedly arranged in the air burst outlet (25), a control column (44) is fixedly arranged in the air burst chamber (41), an inner control pipe (45) is fixedly arranged in the control column (44), a gas leakage groove (46) is formed in the inner side of one end of the inner control pipe (45) close to the air injection direction of the control column (44), the air burst outlet (47) is movably arranged on the inner side of the gas leakage groove (46), the diameter size of the air burst outlet (47) is larger than that of the inner control pipe (45) and smaller than that of the gas leakage groove (46).

2. A high voltage solid state soft starter cabinet according to claim 1, characterized in that a cabinet heat dissipation part (12) is fixedly arranged on the back of the starting cabinet box (11), air outside the starting cabinet box (11) is blown into the starting cabinet box (11), all the components in the electronic component mounting area of the starting cabinet box (11) are cooled, and the air is upwardly flowed in the starting cabinet box (11) to take away the temperature emitted by the components.

3. A high voltage solid state soft starter cabinet according to claim 1, characterized in that, the air guide mechanism one (2) further comprises an air exhaust box (21), the air exhaust box (21) is fixed on the side wall cabinet of the starting cabinet box (11), a plurality of air exhaust fans (27) are fixedly arranged in the air exhaust box (21), the air exhaust direction of the air exhaust fans (27) is from the inside of the starting cabinet box (11) to the outside, a wind collecting opening (28) is arranged at the center position of one side of the air exhaust fans (27), and the wind collecting opening (28) is fixedly connected with the air exhaust box (21).

4. A high voltage solid state soft starter cabinet according to claim 3, characterized in that The air exhaust fan (27) is provided with a connecting plate (201) on the air inlet side, the connecting plate (201) is fixedly connected with the air exhaust box (21), and the side, away from the air exhaust box (21), of the connecting plate (201) is fixedly connected with a vertical plate (22), the vertical plate (22) is communicated with the air exhaust box (21) through the connecting plate (201), a plurality of air inlets (23) are fixed on one side of the vertical plate (22), and the air inlet (26) is communicated with the inside of the vertical plate (22), and the inside of the vertical plate (22) is provided with a gas supply pipe (42).

5. A high voltage solid state soft starter cabinet according to claim 4, characterized in that The corresponding connecting plate (201) of the air guide mechanism one (2) and the air guide mechanism two (3) is provided with a protection pipe (24) below, the air inlet (28) is provided with a gas guide pipe (29), and the corresponding gas guide pipe (29) of the air guide mechanism one (2) extends along the protection pipe (24) and is communicated with the corresponding gas supply pipe (42) of the air guide mechanism two (3), and the corresponding gas guide pipe (29) of the air guide mechanism two (3) also extends along the protection pipe (24) and is communicated with the corresponding gas supply pipe (42) of the air guide mechanism one (2).

6. A high voltage solid state soft starter cabinet according to claim 5, characterized in that The air inlet end of the gas supply pipe (42) is fixedly connected with an expansion air bag (43), the corresponding expansion air bag (43) of the air guide mechanism one (2) is communicated with the corresponding gas guide pipe (29) of the air guide mechanism two (3), and the corresponding expansion air bag (43) of the air guide mechanism two (3) is communicated with the corresponding gas guide pipe (29) of the air guide mechanism one (2).

7. A high voltage solid state soft starter cabinet according to claim 6, characterized in that The inside of the gas cut-off piston (47) is provided with a guide column (48), both ends of the guide column (48) are fixedly connected with the inner control pipe (45), the gas cut-off piston (47) is slidably connected with the guide column (48), and the outside of the guide column (48) on the side, close to the expansion air bag (43), of the gas cut-off piston (47) is provided with a push spring (49).

8. A high voltage solid state soft starter cabinet according to claim 1, characterized in that The control mechanism (5) comprises a support frame (54), and the support frame (54) is fixed to the inner wall of the air inlet (26), a limiting ring (52) is fixedly arranged on the inner side of the support frame (54), a coil spring (53) is fixedly arranged on the inner side of the limiting ring (52), a vortex fan (51) is arranged on one side of the coil spring (53), and the central axis of the vortex fan (51) is fixedly connected with the center end of the coil spring (53), and four extension plates (56) are uniformly arranged on the blades of the vortex fan (51).

9. A high voltage solid state soft starter cabinet according to claim 8, characterized in that One side of the vortex fan (51) is provided with a swing plate (57), and the swing plate (57) is rotatably connected with the inner wall of the air inlet (26), one end of the swing plate (57) is fixedly provided with a pull control wire (55), and the other end of the pull control wire (55) is fixedly connected with the center position of the gas cut-off piston (47).

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