Environment-friendly gas cabinet

Abstract

The invention discloses an environment-friendly gas cabinet which comprises a gas cabinet main body, the gas cabinet main body is arranged on the ground, an electrical element main body is arranged in the gas cabinet main body through a mounting frame, a telescopic isolation cover is arranged on the peripheral side face of the outer portion of the mounting frame, and the telescopic isolation cover is arranged in the gas cabinet main body. A lifting mechanism used for driving the telescopic isolation cover to move in the length direction of the mounting frame is arranged in the gas cabinet body, and the gas cabinet body is provided with a temperature sensing driving mechanism located in the telescopic isolation cover. According to the environment-friendly gas cabinet, intelligent space reconstruction triggered by temperature is achieved, when the temperature in the cabinet rises, the isolation cover is automatically unfolded to form a closed heat insulation layer, and a heat dissipation area is accurately controlled; after the temperature is reduced, the original state is restored, the equipment is kept in an open state, the compactness of the equipment is kept, meanwhile, the heat dissipation problem of a traditional gas cabinet is solved, and the effect that additional auxiliary equipment depends on is eliminated.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas cabinets, and specifically relates to an environmentally friendly gas cabinet. Background Art

[0002] As a kind of power equipment, the core feature of the environmentally friendly gas cabinet is that it uses environmentally friendly gas as the insulation and arc extinguishing medium. Compared with traditional air-insulated switchgear or SF6 gas-insulated switchgear, this equipment shows significant advantages in terms of environmental protection performance, operation safety and power grid environment adaptability. The filled environmentally friendly gas has a low global warming potential (GWP) and is non-toxic and harmless, effectively meeting the technical requirements of the power system for sustainable development, and thus has been widely used. In addition, the environmentally friendly gas cabinet has a compact structure design, high space utilization rate, significantly reduces the floor area of the equipment, and at the same time shows good operation and maintenance convenience.

[0003] However, some technical defects still exist in the actual application of the existing environmentally friendly gas cabinets. Although it uses environmentally friendly gas as the medium, similar to traditional gas cabinets, the equipment needs to maintain high sealing requirements, and the heat dissipation system mainly relies on the circulating water cooling method to achieve heat exchange.

[0004] And there are certain defects in actual use. When the whole device is working, on the one hand, the electrical components continuously generate heat during the working state, and on the other hand, the overall space inside the gas cabinet is relatively large. Simply relying on the circulating water cooling method cannot meet the daily heat dissipation use requirements, so more heat exchange devices need to be introduced or the power of the heat exchange devices needs to be increased to meet the heat dissipation use, which in turn causes an increase in the volume of the equipment and energy consumption. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an environmentally friendly gas cabinet.

[0006] To achieve the foregoing invention purpose, the technical solutions adopted by the present invention include: an environmentally friendly gas cabinet, including a gas cabinet main body, the gas cabinet main body is arranged on the ground, an electrical component main body is arranged inside the gas cabinet main body through a mounting frame, a telescopic partition is arranged on the outer peripheral side of the mounting frame, the telescopic partition is arranged inside the gas cabinet main body, a lifting mechanism is arranged inside the gas cabinet main body for driving the telescopic partition to move in the length direction of the mounting frame, and a temperature sensing driving mechanism is arranged inside the gas cabinet main body within the telescopic partition. When the temperature inside the telescopic partition rises, the temperature sensing driving mechanism drives the lifting mechanism to drive the telescopic partition to extend in the length direction of the mounting frame. When the temperature inside the telescopic partition drops, the temperature sensing driving mechanism drives the lifting mechanism to drive the telescopic partition to contract in the length direction of the mounting frame.

[0007] Preferably, the bottom end of the telescopic partition is connected to the bottom end of the gas cabinet main body through a bottom ring, and a top ring is arranged at the top end of the telescopic partition.

[0008] Preferably, the lifting mechanism includes a screw rod arranged inside the main body of the gas cabinet. A lifting block is arranged on the screw rod through thread engagement, and the lifting block is fixedly connected to the inner arc surface of the top ring.

[0009] Preferably, the lifting mechanism further includes a driven gear fixedly arranged at the bottom end of the screw rod. A speed-regulating gear is engaged with the driven gear, and a main gear is fixedly arranged under the speed-regulating gear. The main gear and the speed-regulating gear are coaxially arranged.

[0010] Preferably, the temperature-sensing driving mechanism includes a rack engaged with the main gear on the main body of the gas cabinet. One end of the rack is fixedly provided with a moving plate, and the moving plate is connected to the inner arc surface of the bottom ring through a shape memory alloy.

[0011] Preferably, a guide groove is formed on the side wall of the rack away from the teeth, and a guide member slidably matched with the guide groove is arranged at the bottom end inside the main body of the gas cabinet.

[0012] In the present invention, through the shape memory alloy, deformation and recovery can be realized according to the temperature inside the main body of the gas cabinet. Cooperating with the lifting mechanism and the telescopic partition, when the temperature is high, the telescopic partition unfolds to isolate and cover the main body of the electrical component, facilitating precise heat dissipation and reducing the overall heat dissipation area. After the temperature recovers, the telescopic partition shrinks, without affecting normal practical maintenance and other operations.

[0013] Preferably, a cylinder is fixedly arranged between the mounting frame and the main body of the gas cabinet, and the cylinder is rotatably connected to the main gear through a bearing.

[0014] Preferably, a heat exchange cavity is formed inside the mounting frame, and a heat exchange tube is arranged in the heat exchange cavity. One end of the heat exchange tube is connected with a liquid inlet pipe, and the other end of the heat exchange tube is provided with a liquid outlet pipe. Both the liquid inlet pipe and the liquid outlet pipe penetrate through the cylinder and extend to below the ground to be connected with a cooling tank.

[0015] In the present invention, by arranging a circulating heat exchange device inside the mounting frame, it is convenient to exchange the heat generated when the main body of the electrical component is working, realizing temperature reduction without affecting normal work and use.

[0016] Preferably, auxiliary pipes are symmetrically arranged on the cooling tank. The auxiliary pipes penetrate through the main body of the gas cabinet and extend to the inside. A telescopic pipe is arranged at the top end of the auxiliary pipe, and the telescopic pipe is connected to the inner arc surface of the top ring through a connecting rod.

[0017] In the present invention, when the telescopic partition expands and contracts, the coolant in the telescopic pipe and the auxiliary pipe can assist in heat exchange along with the expansion and contraction, improving the heat dissipation effect.

[0018] Preferably, a liquid return pipe is arranged on the side wall of the top end of the telescopic pipe, and the bottom end of the liquid return pipe penetrates through the main body of the gas cabinet and is connected to the cooling tank.

[0019] Compared with the prior art, the advantages of the present invention include: (1) An environmentally friendly gas cabinet provided by the present invention adopts a telescopic partition shield driven by a shape memory alloy to achieve intelligent space reconstruction triggered by temperature. When the temperature inside the cabinet rises, the partition shield automatically unfolds to form a sealed heat insulation layer, precisely controlling the heat dissipation area; after the temperature drops, it returns to its original state, maintaining the open state of the equipment without the need for electronic sensors. (2) An environmentally friendly gas cabinet provided by the present invention synergistically combines the non-sensing driving characteristics of a shape memory alloy with an environmentally friendly gas insulating medium to construct a zero-carbon closed loop throughout the entire life cycle from operation to scrapping. (3) An environmentally friendly gas cabinet provided by the present invention. The telescopic partition shield maintains the open and maintainable state of the equipment in the contracted state, and forms an effective heat isolation space in the unfolded state, realizing the decoupled design of the functional mode and space occupation. (4) An environmentally friendly gas cabinet provided by the present invention adopts a spiral heat exchange tube built into the installation frame and a ground cooling box to form a basic cooling path. When the telescopic partition shield unfolds, an auxiliary cooling branch is synchronously activated to form a surrounding enhanced heat dissipation.

[0020] (5) An environmentally friendly gas cabinet provided by the present invention, through the mutual cooperation of the above-mentioned mechanisms, while maintaining the compactness of the equipment, solves the problem of heat dissipation of traditional gas cabinets and eliminates the dependence on additional auxiliary equipment. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application 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 drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a partial structural schematic diagram of an environmentally friendly gas cabinet in the present invention; Figure 2 It is a partial structural schematic diagram of the gas cabinet main body in an environmentally friendly gas cabinet in the present invention; Figure 3 It is one of the structural schematic diagrams of the telescopic partition shield and the lifting mechanism in an environmentally friendly gas cabinet in the present invention; Figure 4 It is the second structural schematic diagram of the telescopic partition shield and the lifting mechanism in an environmentally friendly gas cabinet in the present invention; Figure 5 It is a partial structural schematic diagram on the bottom of the gas cabinet main body in an environmentally friendly gas cabinet in the present invention; Figure 6 It is the structural schematic diagram of the temperature-sensitive driving mechanism and the lifting mechanism in an environmentally friendly gas cabinet in the present invention; Figure 7Schematic diagram of the internal structures of the middle cooling box and the mounting rack in an environment-friendly gas cabinet in the present invention; Figure 8 Schematic diagram of the middle cooling box and the telescopic partition cover in Embodiment 2 of the present invention.

[0023] Reference numerals: 11, main body of the gas cabinet; 12, mounting rack; 13, main body of the electrical component; 14, ground; 21, telescopic partition cover; 22, bottom ring; 23, top ring; 31, screw rod; 32, lifting block; 33, driven gear; 34, speed-regulating gear; 35, main gear; 36, rack; 41, connecting rod; 42, telescopic tube; 43, auxiliary tube; 51, moving plate; 52, shape memory alloy; 53, guide groove; 54, guide member; 61, liquid inlet pipe; 62, cylinder; 63, cooling box; 64, liquid outlet pipe; 65, heat exchange tube; 71, liquid return pipe. Detailed implementation manners

[0024] In view of the deficiencies in the prior art, the inventors of this case have proposed the technical solution of the present invention through long-term research and a large number of practices. The following will further explain and illustrate the technical solution, its implementation process and principles in combination with the drawings in the embodiments of the present application and specific implementation cases.

[0025] It should be noted that the embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, the present invention covers any alternatives, modifications, equivalent methods and solutions made within the spirit, principles and scope of the present invention defined by the claims. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0026] In the description of the present application, words such as "first", "second", "third" and the like do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0027] In the description of the present application, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, when using position terms such as both sides, outer side, upper and lower, etc., it should be understood that they are only used for easy understanding and description, considering that the structure may face other positions.

[0028] In the description of the present application, unless otherwise clearly specified and defined, the technical terms or scientific terms used should have the ordinary meaning understood by those with ordinary skills in the field to which the present application belongs. Terms such as "installation", "connection", "coupling", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a contact connection or an integral connection; for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] The embodiments of the present invention are intended to introduce and illustrate the structural composition of the environmental protection gas cabinet and the cooperation relationship between the various component structures. Unless otherwise specified, the dimensions, materials, manufacturing processes, etc. of the various components suitable for the environmental protection gas cabinet in the embodiments of the present invention can be selected according to specific circumstances, and no special limitations and explanations are made here.

[0030] Furthermore, in order to enable the public to have a better understanding of the present invention, in the following detailed description of the present invention, some specific details are described in detail. Those skilled in the art can fully understand the present invention without the description of these details.

[0031] Embodiment 1 Please refer to Figures 1 - 7, An environmentally friendly gas cabinet, including a gas cabinet main body 11, which is installed on the ground 14 and can also be installed at other corresponding positions according to actual usage conditions. In the figure, the gas cabinet main body 11 is mainly a shell, and its complete structure also covers a cabinet door. A sealing structure is provided between the cabinet door and the shell, and reliable sealing is achieved through the precise fit of a sealing gasket and a sealing groove. It mainly also includes an inflation unit (designed with an air box, which can completely seal all high-voltage live components, using dry air, nitrogen, or other environmentally friendly gases to replace traditional SF6 gas as the insulating medium to provide an insulating and arc-extinguishing environment for the equipment), an electrical component main body 13 (mainly including core electrical components such as circuit breakers, contactors, current transformers, fuses, disconnecting switches, etc., which can be reasonably assembled according to actual usage requirements), an intelligent component (composed of sensors for monitoring temperature, current, and partial discharge, and an instrument unit integrating functions such as a microcomputer protection device, a live-line indicator, and a fault indicator), etc. These are relatively mature technologies and will not be elaborated here. The electrical component main body 13 inside the gas cabinet main body 11 is assembled with the installation frame 12 (which can be installed and fixed in a detachable manner such as by clamping or screws, ensuring both the stability of the equipment during operation and facilitating subsequent disassembly and maintenance work). A telescopic partition 21 is provided on the outer peripheral side of the installation frame 12. The telescopic partition 21 is arranged inside the gas cabinet main body 11. A lifting mechanism for moving the telescopic partition 21 in the length direction (i.e., the vertical direction) of the installation frame 12 is provided inside the gas cabinet main body 11. A temperature-sensing driving mechanism is provided inside the gas cabinet main body 11 within the telescopic partition 21. When the temperature inside the telescopic partition 21 rises, the temperature-sensing driving mechanism drives the lifting mechanism to extend the telescopic partition 21 in the length direction of the installation frame 12. When the temperature inside the telescopic partition 21 drops, the temperature-sensing driving mechanism drives the lifting mechanism to contract the telescopic partition 21 in the length direction of the installation frame 12.

[0032] For the telescopic partition 21, the bottom end of the telescopic partition 21 is connected to the bottom end of the gas cabinet main body 11 through a bottom ring 22. The top end of the telescopic partition 21 is provided with a top ring 23. The material of the telescopic partition 21 can be made of expandable and contractible materials such as paper or rubber. When expanded, it can separate and cover the electrical component main body 13, reducing heat exchange with the outside world and having a certain heat preservation effect. Specifically, it can also be a corrugated pipe. In order to reduce heat exchange with the outside world, a cavity can be provided inside the telescopic partition 21, and heat insulation cotton can be bonded to the inner wall of the cavity to play a role in reducing heat exchange with the outside world. When the temperature inside the gas cabinet main body 11 is relatively high, the electrical component main body 13 on the installation frame 12 can be separated, and it can cooperate with the internal heat dissipation device to improve the heat dissipation efficiency and achieve precise local heat dissipation.

[0033] Please refer to Figures 1 - 7, when the temperature inside the main body 11 of the gas cabinet rises and rapid heat dissipation of the main body 13 of the electrical component is required, the telescopic partition 21 moves and unfolds along the length direction (i.e., the vertical direction) of the mounting frame 12, separates and covers the main body 13 of the electrical component, dissipates heat inside the telescopic partition 21, and at the same time reduces the heat exchange with the outside. A lifting mechanism is provided inside the main body 11 of the gas cabinet. The lifting mechanism includes a screw 31 provided inside the main body 11 of the gas cabinet. The number of screws 31 can be two groups. As Figure 3 shown, the top and bottom of the screw 31 can be rotatably connected to the main body 11 of the gas cabinet through bearing seats to ensure the stability of the screw 31 during rotation and avoid axial offset. A lifting block 32 is arranged on the screw 31 through thread engagement. The lifting block 32 is fixedly connected to the inner arc surface of the top ring 23. A driven gear 33 is arranged outside the bottom end of the screw 31. The driven gear 33 is engaged with a speed regulating gear 34. For the driven gear 33 and the speed regulating gear 34, the number of teeth of the speed regulating gear 34 can be 6-10 times that of the driven gear 33, and can be 6, 7, 8, 9, 10 times, which can meet the requirement of driving the rack 36 to move by the shape memory alloy 52. The main gear 35 and the speed regulating gear 34 rotate, and the driven gear 33 rotates accordingly, which can effectively convert the displacement of the shape memory alloy in the temperature sensing driving mechanism into the axial rotation of the screw 31, so as to realize the unfolding and retracting actions of the telescopic partition 21 to meet the isolation requirement of the main body 13 of the electrical component. Preferably, the number of teeth of the speed regulating gear 34 can be 8 times that of the driven gear 33. A main gear 35 is fixedly arranged below the speed regulating gear 34. The main gear 35 is coaxially arranged with the speed regulating gear 34.

[0034] Please refer to Figures 1 - 7 , when the main body 13 of the electrical component inside the main body 11 of the gas cabinet is working, according to the internal temperature, the telescopic partition 21 is unfolded and retracted to achieve isolation, which is convenient for precise local heat dissipation. The temperature sensing driving mechanism includes a rack 36 meshed with the main gear 35 in the main body 11 of the gas cabinet. One end of the rack 36 is fixedly provided with a moving plate 51. The moving plate 51 is connected to the inner arc surface of the bottom ring 22 through a shape memory alloy 52. For the shape memory alloy 52, the material can adopt the two-way shape memory of Ni-Ti-Cu alloy, and the shape can be spring-shaped or the same as that of a corrugated pipe. When heated, it drives the moving plate 51 and the rack 36 to move in the horizontal direction, and can be reset after the temperature drops, that is, when repeatedly heating and cooling between Af and Ms (martensite start temperature), it will automatically shrink or stretch. This is a relatively mature technology and will not be elaborated here. A guide groove 53 is opened on the side wall of the rack 36 away from the teeth. A guide member 54 slidably matched with the guide groove 53 is arranged at the bottom end inside the main body 11 of the gas cabinet to ensure the stability of the movement in the horizontal direction and play a role of guiding and limiting during the movement. For the guide member 54, a ball is rollingly embedded on the end surface in contact with the guide groove 53 to reduce the friction during contact and facilitate sliding and guiding.

[0035] Please refer to Figures 1 - 7 , a cylinder 62 is fixedly arranged between the mounting frame 12 and the gas cabinet main body 11. The cylinder 62 is rotationally connected to the main gear 35 through a bearing, which does not affect the rotation of the main gear 35 and the speed regulation gear 34. A heat exchange cavity is formed inside the mounting frame 12, and a heat exchange tube 65 is arranged in the heat exchange cavity to exchange heat for the electrical component main body 13 mounted on the mounting frame 12 to ensure the heat dissipation effect. One end of the heat exchange tube 65 is connected with a liquid inlet pipe 61, and the other end of the heat exchange tube 65 is provided with a liquid outlet pipe 64. Both the liquid inlet pipe 61 and the liquid outlet pipe 64 penetrate through the cylinder 62 and extend to the lower part of the ground 14 to be connected with a cooling tank 63. The cooling tank 63 is buried under the ground 14. The cooling of the coolant (which can be water) can be achieved by natural cooling, or other methods can also be used to achieve cooling. It is a relatively mature technology and will not be elaborated here. Auxiliary pipes 43 are symmetrically arranged on the cooling tank 63. For the liquid outlet pipe 64, a circulation pump (not shown in the figure) can be installed on it to realize the circulating flow of the coolant and ensure the heat exchange effect. The auxiliary pipes 43 penetrate through the gas cabinet main body 11 and extend to the inside. A sealing ring (not shown in the figure) is adhered to the outside of the auxiliary pipes 43 to ensure the sealing effect between the auxiliary pipes 43 and the gas cabinet main body 11. The top of the auxiliary pipe 43 is provided with a telescopic pipe 42, and the telescopic pipe 42 is connected to the inner arc surface of the top ring 23 through a connecting rod 41. When the telescopic partition 21 is unfolded, the telescopic pipe 42 is straightened synchronously. Then, the coolant in the cooling tank 63 can enter the inside of the telescopic pipe 42 through the auxiliary pipe 43 for auxiliary heat exchange.

[0036] Working principle: The electrical component main body 13 inside the gas cabinet main body 11 operates, and the heat generated during the operation is exchanged through the heat exchange tube 65 inside the mounting rack 12. In cooperation with the cooling box 63, the liquid outlet pipe 64, and the liquid inlet pipe 61, the circulating flow of the coolant is realized to ensure the heat exchange effect. When the heat exchange efficiency cannot meet the working requirements of the electrical component main body 13, the temperature inside the gas cabinet main body 11 gradually rises. The shape memory alloy 52 inside the telescopic partition 21 senses the temperature. When the temperature gradually rises and reaches the phase change temperature, the shape memory alloy 52 gradually returns to its initial shape (when it is in the shape of a spring, it returns to the stretched state of the spring), driving the rack 36 to move. In cooperation with the guide member 54 and the guide groove 53, it ensures the stability of the rack 36 moving in the horizontal direction. Furthermore, it can drive the main gear 35 and the speed regulating gear 34 to rotate. Under the meshing action of the gears, it drives the driven gear 33 and the screw 31 to rotate. Under the action of the thread meshing, it drives the lifting block 32 to move upward on the screw 31, driving the top ring 23 and the telescopic partition 21 to move upward, covering the electrical component main body 13 on the mounting rack 12. At the same time, the telescopic tube 42 on the auxiliary tube 43 extends, and the coolant in the cooling box 63 enters the telescopic tube 42 to assist in heat exchange. When the telescopic partition 21 unfolds, it can isolate and cover the electrical component main body 13, reducing the heat exchange with the outside world. At this time, in cooperation with the heat exchange tube 65 and the auxiliary tube 43 and the telescopic tube 42 to achieve heat exchange, precise local cooling can be achieved, ensuring that the electrical component main body 13 works at a relatively safe temperature. As time goes by, the temperature inside the telescopic partition 21 gradually decreases and then is within the martensite phase change temperature range. When the shape memory alloy 52 cools, it will automatically return to the low-temperature preset shape, driving the rack 36 to move back to its original position. Furthermore, it drives the screw 31 to rotate in the reverse direction, driving the lifting block 32 to move downward, and the telescopic partition 21 contracts.

[0037] Embodiment 2 Please refer to Figure 1 、 Figure 7 For the telescopic tube 42, a liquid return pipe 71 is provided on the side wall at the top end of the telescopic tube 42. The bottom end of the liquid return pipe 71 penetrates through the gas cabinet main body 11 and is connected to the cooling box 63, which can realize the circulating flow and assist in heat exchange. For the liquid return pipe 71, its structure is the same as that of the telescopic tube 42 and the auxiliary tube 43, and the upper end is telescopic, which does not affect the telescopic movement. To improve the heat exchange effect, a circulation pump is installed on the auxiliary tube 43 to realize the circulating flow of the coolant, thereby ensuring the heat exchange effect.

[0038] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. An environmentally friendly gas cabinet, comprising a gas cabinet main body (11), the gas cabinet main body (11) is arranged on the ground (14), and an electrical component main body (13) is arranged inside the gas cabinet main body (11) through a mounting frame (12), characterized in that: An expansion and contraction partition cover (21) is provided on the outer peripheral side of the mounting frame (12). The expansion and contraction partition cover (21) is arranged inside the gas cabinet main body (11). A lifting mechanism for moving the expansion and contraction partition cover (21) in the length direction of the mounting frame (12) is provided inside the gas cabinet main body (11). A temperature-sensing driving mechanism is provided inside the gas cabinet main body (11) within the expansion and contraction partition cover (21). When the temperature inside the expansion and contraction partition cover (21) rises, the temperature-sensing driving mechanism drives the lifting mechanism to extend the expansion and contraction partition cover (21) in the length direction of the mounting frame (12). When the temperature inside the expansion and contraction partition cover (21) drops, the temperature-sensing driving mechanism drives the lifting mechanism to contract the expansion and contraction partition cover (21) in the length direction of the mounting frame (12).

2. The environmental protection gas cabinet according to claim 1, characterized in that: The bottom end of the expansion and contraction partition cover (21) is connected to the bottom end of the gas cabinet main body (11) through a bottom ring (22), and a top ring (23) is provided at the top end of the expansion and contraction partition cover (21).

3. The environmental protection gas cabinet according to claim 2, characterized in that: The lifting mechanism includes a screw rod (31) arranged inside the gas cabinet main body (11). A lifting block (32) is arranged on the screw rod (31) through thread engagement, and the lifting block (32) is fixedly connected to the inner arc surface of the top ring (23).

4. The environmental protection gas cabinet according to claim 3, characterized in that: The lifting mechanism further includes a driven gear (33) fixedly arranged at the bottom end of the screw rod (31). A speed-regulating gear (34) is engaged with the driven gear (33). A main gear (35) is fixedly arranged below the speed-regulating gear (34), and the main gear (35) is coaxially arranged with the speed-regulating gear (34).

5. An environmentally friendly gas cabinet according to claim 4, characterized in that: The temperature-sensing driving mechanism includes a rack (36) arranged inside the gas cabinet main body (11) and engaged with the main gear (35). A moving plate (51) is fixedly arranged at one end of the rack (36). The moving plate (51) is connected to the inner arc surface of the bottom ring (22) through a shape memory alloy (52).

6. The environmentally friendly gas cabinet according to claim 5, characterized in that: A guide groove (53) is formed on the side wall of the rack (36) away from the teeth. A guide member (54) that is slidably matched with the guide groove (53) is arranged at the bottom end inside the gas cabinet main body (11).

7. An environmentally friendly gas cabinet according to claim 4, characterized in that: A cylinder (62) is fixedly arranged between the mounting frame (12) and the gas cabinet main body (11). The cylinder (62) is rotatably connected to the main gear (35) through a bearing.

8. An environmentally friendly gas cabinet according to claim 7, characterized in that: A heat exchange cavity is formed inside the mounting frame (12). A heat exchange tube (65) is arranged inside the heat exchange cavity. One end of the heat exchange tube (65) is connected to a liquid inlet pipe (61), and the other end of the heat exchange tube (65) is provided with a liquid outlet pipe (64). The liquid inlet pipe (61) and the liquid outlet pipe (64) both penetrate through the cylinder (62) and extend below the ground (14) to be connected to a cooling tank (63).

9. The environmental protection gas cabinet according to claim 8, characterized in that: Auxiliary pipes (43) are symmetrically arranged on the cooling tank (63). The auxiliary pipes (43) penetrate through the gas cabinet main body (11) and extend to the inside. A telescopic pipe (42) is arranged at the top end of the auxiliary pipe (43). The telescopic pipe (42) is connected to the inner arc surface of the top ring (23) through a connecting rod (41).

10. An environmentally friendly gas cabinet according to claim 9, characterized in that: A liquid return pipe (71) is provided on the side wall at the top end of the telescopic pipe (42), and the bottom end of the liquid return pipe (71) penetrates through the main body (11) of the gas cabinet and is connected to the cooling box (63).

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