Explosion-proof electrical cabinet for air compressor

Abstract

The invention relates to the technical field of air compressor electrical cabinets, in particular to an explosion-proof electrical cabinet for an air compressor, which comprises a cabinet body, a bottom plate is fixedly connected to the bottom of the cabinet body, a mounting frame is fixedly connected to the bottom plate, a cabinet door is rotatably connected to one side of an opening of the cabinet body, two groups of sliding rods are fixedly connected to two sides of the bottom plate in the cabinet body, and a cover frame is slidably connected to the two groups of sliding rods. A flexible cover curtain is fixedly connected between the cover frame and the top of the cabinet body in a sealed mode, a gas concentration sensor is fixedly connected to the surface of the bottom plate, and cooling parts are arranged on the cabinet body and the cabinet door. The cooling component is arranged, airflow can be formed in the cabinet body to cool the frequency conversion component, the situation that the frequency conversion component breaks down and is damaged due to the fact that heat in the cabinet body is difficult to dissipate is avoided, the cover frame and the cover curtain rapidly fall to form the closed space, nitrogen is filled into the closed space, combustible gas is isolated, and explosion is prevented. Personnel safety and frequency conversion part safety are protected.

Description

Technical Field

[0001] The invention relates to the technical field of air compressor electrical cabinets, in particular to an explosion-proof electrical cabinet for an air compressor. Background Art

[0002] An air compressor, also known as an air compressor, is a device that converts mechanical energy into gas pressure energy. It is widely used in construction, metallurgy, textile, chemical, electronics, plastics, food, military and other industries. With the development of air compressor technology, air compressors with speed regulation and frequency conversion have emerged, which can save electricity and improve the working performance and status of the air compressor. In order to realize the frequency conversion function of the air compressor, matching frequency conversion components are required.

[0003] In actual scenarios, the frequency conversion components of the air compressor need to be installed in an independent electrical cabinet to facilitate the debugging and maintenance of the frequency conversion components and to protect the frequency conversion equipment. Most electrical cabinets are directly installed in the processing workshop of the factory. The frequency conversion components of the air compressor will generate a lot of heat when they are powered on for a long time. If the heat is difficult to dissipate in high temperature weather, it is easy to cause short circuit failure or even damage to the frequency conversion components. In the use scenarios of chemical industries, if chemical products leak and flammable gases or dust are mixed into the air, once the frequency conversion components in the electrical cabinet short-circuit and ignite, it is very easy to cause deflagration, causing danger to personnel and asset loss. Therefore, explosion-proof electrical cabinets for air compressor frequency conversion components were born.

[0004] However, there is a contradiction between the existing technology's heat dissipation requirements and explosion-proof requirements for frequency conversion components:

[0005] For example, a Chinese patent with publication number CN222016002U discloses a ventilated explosion-proof electrical cabinet for an air compressor, comprising a cabinet, a middle frame fixedly installed in the cabinet, air compressor frequency conversion components installed at the rear of the middle frame, a first cabinet door connected to the middle frame provided at the front of the middle frame, a second cabinet door connected to the cabinet provided on the outer side of the first cabinet door, an air inlet assembly installed on the second cabinet door, an air inlet provided on the first cabinet door, an air outlet fixedly installed on the side of the cabinet, this patent divides the inner cavity of the cabinet into two spaces, and by arranging the air inlet assembly and the air outlet assembly, external air flow circulates in the inner cavity of the cabinet, so as to reduce the temperature of the air compressor frequency conversion components during operation, reduce the failure probability of the air compressor frequency conversion components, improve the operating efficiency of the air compressor, and make the air inlet airflow flow speed less than the air outlet airflow flow speed, so that the space where the air compressor frequency conversion components are located is always in a negative pressure state, so as to avoid the external explosive gas from being retained in the space for a long time, thereby achieving the explosion-proof effect of the electrical cabinet.

[0006] The above patent describes that the inside of the electrical cabinet is in a negative pressure state by controlling the flow rate of the incoming air flow to be lower than the flow rate of the outgoing air flow. However, in actual use, outside air will enter through the gaps in the electrical cabinet, making it difficult to maintain a stable negative pressure state for a long time. The combustible gas or dust inside the electrical cabinet will still come into contact with the frequency conversion components, and the explosion isolation effect cannot be achieved.

[0007] Another example is a Chinese patent with publication number CN105914596B, which discloses an explosion-proof power distribution cabinet, including a cabinet body and a cabinet door, three manual reversing valves, a nitrogen bottle, a primary pressure reducing valve and a secondary pressure reducing valve, etc. The cabinet door is installed on the front side of the cabinet body, and three manual reversing valves and an observation window are installed on the cabinet door; the outlet of the nitrogen bottle is connected to a primary pressure reducing valve, and a three-way air inlet is connected behind the primary pressure reducing valve; the three manual reversing valves correspond to three cylinders respectively; the cylinder bodies of the three cylinders are respectively hingedly installed at the bottom of three slide rails, the three switch plates are respectively slidably installed on the three slide rails, and the piston ends of the three cylinders are respectively fixedly connected to the three switch levers; the three load switches are respectively installed in the cabinet body, and by providing a nitrogen protection device and a pneumatic switch, when explosion-proof protection is required, nitrogen is introduced into the cabinet body to isolate oxygen and other flammable gases or dust, so as to prevent the electrical components from igniting the flammable gases or dust, thereby realizing the explosion-proof function.

[0008] However, in order to ensure the effect of using nitrogen to isolate combustible gases or dust, this patent makes the cabinet itself airtight, and it is difficult for outside air to enter the cabinet, which makes it difficult to exchange heat inside and outside the cabinet, resulting in difficulty in heat dissipation, which can easily lead to failure and damage of electrical components. Summary of the invention

[0009] In order to overcome the deficiencies of the prior art, the present invention solves the technical problem of providing a fan to continuously deliver external air into the cabinet, and take away the heat generated by the frequency conversion components inside the cabinet, and finally discharge it from the exhaust port, thereby achieving a cooling effect on the frequency conversion components, avoiding the difficulty in dissipating the heat in the cabinet, causing the frequency conversion components to work at high temperatures for a long time, resulting in damage and failure of the frequency conversion components, and improving the service life of the frequency conversion components. When there is a risk of explosion, the cover frame can be controlled to fall, so that the cover curtain covers the sealed frequency conversion components, and when the cover frame falls, the seal on the bent pipe is released, thereby achieving the function of introducing nitrogen into the cover curtain, using nitrogen to replace the air mixed with combustible gases in the cover curtain, and isolating oxygen to avoid explosion, thereby protecting personnel and frequency conversion components.

[0010] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: an explosion-proof electrical cabinet for an air compressor, comprising:

[0011] A cabinet body, wherein a bottom plate is fixedly connected to the bottom of the cabinet body, a mounting frame is fixedly connected to the bottom plate, and a cabinet door is rotatably connected to one side of the cabinet body opening;

[0012] Slide rods, two groups of slide rods are fixedly connected at both sides of the bottom plate in the cabinet, cover frames are slidably connected to the two groups of slide rods, and a flexible cover curtain is sealed and fixedly connected between the cover frame and the top of the cabinet;

[0013] The cover frame and the cover curtain are sleeved on the outside of the mounting frame, a gas concentration sensor is fixedly connected to the surface of the bottom plate, a wiring hole is opened on the bottom plate, and a cooling component is arranged on the cabinet body and the cabinet door.

[0014] Furthermore, the bottom of the cabinet is fixedly connected to two axles on both sides of the bottom plate, each of the axles is rotatably connected to a winding wheel, a winding spring wrapped around the outside of the axle is connected between the winding wheel and the axle, a traction rope is wound and fixed on the winding wheel, and the end of the traction rope away from the winding wheel is fixedly connected to the cover frame.

[0015] Furthermore, a group of pulley seats are fixedly connected to the bottom of the cabinet near each winding wheel, and pulleys are rotatably connected between each group of pulley seats, and each traction rope is passed around the outside of the corresponding pulley.

[0016] Furthermore, two lifting rings are fixedly connected on both sides of the cover frame, and a fixed hook claw is fixedly connected at a position corresponding to each lifting ring on the top of the cabinet, and a movable hook claw is rotatably connected to each of the fixed hook claws. The fixed hook claw and the movable hook claw can buckle the lifting ring, and a connecting pin is slidably connected to each of the movable hook claws. An electromagnetic push rod is fixedly connected at a position corresponding to each connecting pin on the top of the cabinet, and the extended end of each electromagnetic push rod passes through the cabinet and is fixedly connected to the corresponding connecting pin.

[0017] Furthermore, two cover shells are fixedly connected to the two sides of the cabinet exterior, one end of each movable hook is fixedly connected to an emergency cable, and each emergency cable passes through the side wall of the cabinet and is coiled and rolled up in the corresponding cover shell.

[0018] Furthermore, a multi-way pressure reducing valve is fixedly connected to the top of the cabinet, a plurality of gas cylinders are fixedly connected to one side of the multi-way pressure reducing valve, each of the gas cylinders is filled with compressed nitrogen, and a curved pipe extending into the inner side of the cover curtain is fixedly connected to the bottom of the multi-way pressure reducing valve, an end of the curved pipe away from the multi-way pressure reducing valve is sleeved with an end cover, and a sealing plug for sealing the curved pipe is fixedly connected inside the end cover.

[0019] Furthermore, a spring surrounding the outside of the bent pipe is connected between the end cover and the end of the bent pipe, a locking pin is inserted between the bent pipe and the end cover, and a pull rope is connected between the locking pin and one side of the curtain.

[0020] Furthermore, the cooling component includes an air inlet shell, a plurality of air inlet shells are fixedly connected to the outer side of the cabinet door, each of the air inlet shells is fixedly connected to a fan connected to the inside of the cabinet, a filter with fine mesh is arranged between the air inlet shell and the fan, and a plurality of exhaust ports are evenly distributed on the outer walls on both sides of the cabinet.

[0021] Furthermore, a support ring is fixedly connected to one side of the inner side of the cabinet door close to the cover frame, a support rod is movably connected to the support ring, a support rod groove for accommodating the support rod is provided on the cover frame close to the support rod, and a gasket is fixedly connected to the end of the support rod.

[0022] Furthermore, the cover curtain is a double-layer arrangement, the outer layer of the cover curtain is supported by a high-strength textile material, and the inner layer of the cover curtain is made of an airtight plastic material.

[0023] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0024] (1) By setting up a fan, when the air compressor inverter is working, air flow can be formed in the cabinet to cool the inverter components, so as to prevent the heat in the cabinet from being difficult to dissipate, causing the inverter components to work in a high temperature environment for a long time, resulting in failure and damage of the inverter components.

[0025] (2) By setting up a cover frame and a cover curtain, when there is a risk of explosion, they can quickly fall down to form a closed space, and fill the closed space with nitrogen to isolate the flammable gas, prevent explosion, and protect the safety of personnel and frequency conversion components.

[0026] (3) When the frequency conversion component is working normally, the cover curtain is in a folded storage state, which does not affect the normal contact between the airflow and the frequency conversion component, thereby ensuring efficient heat dissipation. When there is a risk of explosion, the frequency conversion component can be effectively protected, which effectively solves the contradiction between heat dissipation and explosion protection in existing electrical cabinets. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a three-dimensional schematic diagram of this patent.

[0028] Figure 2 for Figure 1 A partial enlarged view of point B in the middle.

[0029] Figure 3 This is the front view of this patent.

[0030] Figure 4 for Figure 3 Stereoscopic cross-sectional view at AA in the middle.

[0031] Figure 5 for Figure 4 A partial enlarged view of point C in the middle.

[0032] Figure 6 It is a schematic diagram of the structure of the cover curtain of this patent when it falls.

[0033] Figure 7 for Figure 6 A partial enlarged view of point D in the middle.

[0034] Figure 8 It is a schematic diagram of the structure of the reel.

[0035] Fig. 9 This is a schematic diagram of the fan structure.

[0036] Fig.10 It is a three-dimensional schematic diagram of this patent when the cabinet door is closed.

[0037] Explanation of the reference numerals: cabinet body 10; bottom plate 11; mounting frame 12; gas concentration sensor 13; cabinet door 14; window 15; fan 16; filter 17; air inlet shell 18; air outlet 19; cover frame 20; cover curtain 21; slide bar 22; traction rope 23; pulley seat 24; pulley 25; take-up wheel 26; coil spring 27; axle 28; lifting ring 29; fixed hook 30; moving hook 31; connecting pin 32; electromagnetic push rod 33; emergency pull rope 34; cover shell 35; gas cylinder 36; multi-way pressure reducing valve 37; elbow 38; end cover 39; sealing plug 40; spring 41; locking pin 42; pull rope 43; support rod groove 44; support rod 45; support ring 46; gasket 47. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] Embodiment 1:

[0040] like Figure 1 , Figure 3 , Figure 4 , Fig. 9 and Fig.10 As shown, an explosion-proof electrical cabinet for an air compressor comprises a cabinet body 10, a cabinet door 14 is rotatably connected to one side of an opening of the cabinet body 10, a transparent window 15 is fixedly connected to the cabinet door 14, two air inlet shells 18 are fixedly connected to the outer side of the cabinet door 14, each air inlet shell 18 has a through hole, a fan 16 is fixedly connected inside each air inlet shell 18, a filter screen 17 with fine mesh is arranged between each fan 16 and the air inlet shell 18, a plurality of exhaust ports 19 are evenly distributed on both sides of the outer wall of the cabinet body 10, a bottom plate 11 is fixedly connected to the bottom of the cabinet body 10, a mounting frame 12 for mounting the frequency conversion component of the air compressor is fixedly connected to the bottom plate 11, and a wiring hole is opened on the bottom plate 11.

[0041] By setting up the fan 16, the outside air can be continuously transported into the cabinet 10, and the heat generated by the frequency conversion components inside the cabinet 10 can be taken away and finally discharged from the exhaust port 19, thereby achieving a cooling effect on the frequency conversion components, avoiding the difficulty in dissipating the heat in the cabinet 10, causing the frequency conversion components to work in high temperature for a long time, resulting in damage and failure of the frequency conversion components, and improving the service life of the frequency conversion components.

[0042] like Figure 1 , Figure 3 and Figure 7 As shown, two groups of slide bars 22 are fixedly connected at both sides of the bottom plate 11 in the cabinet 10, and a cover frame 20 is slidably connected to the two groups of slide bars 22. A flexible cover curtain 21 is sealed between the cover frame 20 and the top of the cabinet 10. The cover frame 20 can be tightly spliced ​​with the bottom plate 11. A gas concentration sensor 13 is fixedly connected at one side of the mounting frame 12 on the bottom plate 11. The cover frame 20 and the cover curtain 21 are sleeved on the outside of the mounting frame 12. Two hanging Ring 29, a fixed hook claw 30 is fixedly connected to the top of the cabinet 10 at a position corresponding to each lifting ring 29, and a movable hook claw 31 is rotatably connected to each fixed hook claw 30. The fixed hook claw 30 and the movable hook claw 31 can buckle the lifting ring 29, and each movable hook claw 31 is slidably connected to a connecting pin 32. An electromagnetic push rod 33 is fixedly connected to the top of the cabinet 10 at a position corresponding to each connecting pin 32, and the extended end of each electromagnetic push rod 33 passes through the cabinet 10 and is fixedly connected to the corresponding connecting pin 32.

[0043] By setting the movable hook 31 and the connecting pin 32, the slide bar 22 can be lifted. At this time, the air compressor frequency conversion component on the mounting frame 12 can be fully in contact with the airflow, thereby achieving an efficient cooling effect. When there is a risk of explosion, the cover frame 20 can be controlled to fall, so that the cover curtain 21 covers the sealed frequency conversion component, and nitrogen is introduced to avoid explosion, thereby protecting personnel and frequency conversion components.

[0044] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, a multi-way pressure reducing valve 37 is fixedly connected to the top of the cabinet 10, and a plurality of gas cylinders 36 are fixedly connected to one side of the multi-way pressure reducing valve 37, each gas cylinder 36 is filled with compressed nitrogen, and a curved pipe 38 extending into the inner side of the curtain 21 is fixedly connected to the bottom of the multi-way pressure reducing valve 37, and an end cover 39 is sleeved on the end of the curved pipe 38 away from the multi-way pressure reducing valve 37, and a sealing plug 40 for sealing the curved pipe 38 is fixedly connected in the end cover 39, a spring 41 surrounding the outer side of the curved pipe 38 is connected between the end cover 39 and the end of the curved pipe 38, a locking pin 42 is inserted between the curved pipe 38 and the end cover 39, and a pull rope 43 is connected between the locking pin 42 and one side of the curtain 21.

[0045] By providing the locking pin 42 and the pull rope 43, the seal of the bent pipe 38 can be released when the cover frame 20 falls, thereby achieving the function of introducing nitrogen into the cover curtain 21, replacing the air mixed with the combustible gas in the cover curtain 21 with nitrogen, and isolating oxygen, thereby playing a role in avoiding explosion.

[0046] like Figure 3 , Figure 6 and Figure 7 As shown, one end of each movable hook 31 is fixedly connected to an emergency cable 34, and both sides of the outer wall of the cabinet 10 are fixedly connected to a cover shell 35, each cover shell 35 has a transparent layer, and each emergency cable 34 passes through the outer wall of the cabinet 10 and is coiled and rolled up in the corresponding cover shell 35. The cover curtain 21 is a double-layer setting, the outer layer of the cover curtain 21 is made of high-strength textile fabric, and the inner layer of the cover curtain 21 is made of airtight plastic, and the two layers are glued to each other.

[0047] By providing an emergency pull rope 34, when there is a risk of explosion and the electromagnetic push rod 33 fails and the cover frame 20 cannot fall normally, a person can manually pull the emergency pull rope 34 to open the movable hook 31, and then manually control the cover curtain 21 to cover the frequency conversion component for protection. The airtight plastic material of the inner layer of the cover curtain 21 can improve the sealing performance of the cover curtain 21, thereby preventing external flammable gases from entering the cover curtain 21 again after the cover curtain 21 covers the frequency conversion component.

[0048] like Figure 1 , Figure 6 and Figure 8 As shown, two wheel axles 28 are symmetrically distributed and fixedly connected on the inner wall of the cabinet 10 at both sides of the bottom plate 11, each wheel axle 28 is rotatably connected to a winding wheel 26, and a winding spring 27 surrounding the outside of the wheel axle 28 is connected between each winding wheel 26 and the wheel axle 28. A traction rope 23 is wound and fixed on each winding wheel 26, and one end of each traction rope 23 away from the winding wheel 26 is fixedly connected to the cover frame 20. A group of pulley seats 24 are fixedly connected to the bottom side of the cabinet 10 on one side of each winding wheel 26, and a pulley 25 is rotatably connected between each group of pulley seats 24, and each traction rope 23 passes around the outside of the corresponding pulley 25.

[0049] By providing the reel 26 and the coil spring 27, a pulling force can be provided. When the lifting ring 29 is separated from the driven hook 31 and the connecting pin 32, the cover curtain 21 can fall quickly, and the frequency conversion component can be shielded and protected in time. When the cover frame 20 falls, there is enough kinetic energy to pull the locking pin 42 away from the elbow 38 and the end cover 39, so as to ensure that the nitrogen can smoothly enter the cover curtain 21.

[0050] In this embodiment, initially, the operator sets up the patent in the designated working area, installs the air compressor frequency conversion component on the mounting frame 12, and connects the power supply and the control system. At this time, the gas cylinder 36 is filled with compressed nitrogen, the sealing plug 40 blocks the bent pipe 38, the fixed hook claw 30 and the movable hook claw 31 close the hook ring 29 so that the cover frame 20 is located at a high place, the cover curtain 21 is folded and stored between the cover frame 20 and the top of the cabinet 10, the coil spring 27 is in a compressed state to store elasticity, and the emergency pull cable 34 is rolled up in the cover shell 35.

[0051] When the transformer frequency conversion component is working normally, the fan 16 is started to continuously transport external air to the inside of the cabinet 10 to form an airflow. The airflow contacts the frequency conversion component to take away heat and is finally discharged from the exhaust port 19 to achieve a cooling effect on the frequency conversion component. When the airflow passes through the filter 17, the filter 17 can filter the air and filter out impurities such as dust and particles to prevent dust in the cabinet 10 from affecting the normal operation of the frequency conversion component.

[0052] While the frequency conversion component is working, the cover frame 20 and the cover curtain 21 are always located at a high position, which will not affect the contact between the airflow and the frequency conversion component, thereby effectively ensuring the cooling effect, and the operator can observe the working status of the frequency converter or read the value through the window 15.

[0053] When combustible gas is mixed in the space around the cabinet 10, the gas concentration sensor 13 can automatically detect the concentration of the combustible gas. If the concentration of the combustible gas reaches a dangerous value sufficient to cause an explosion, the control system automatically controls the electromagnetic push rod 33, and the electromagnetic push rod 33 pushes the movable hook 31 to open, so that the hanging ring 29 is detached from the hook. At this time, the coil spring 27 releases its elasticity and drives the winding wheel 26 to quickly rotate the winding traction rope 23, so that the traction rope 23 pulls the cover frame 20 and the cover curtain 21 to fall rapidly until the cover frame 20 is assembled on the bottom plate 11, and the cover curtain 21 completely covers the frequency conversion components on the mounting frame 12, forming a closed space inside the cover curtain 21.

[0054] At the same time, when the cover frame 20 falls, the pull rope 43 is pulled to make the locking pin 42 disengage from the end cover 39 and the elbow 38, and the spring 41 releases its elasticity, pushing the sealing plug 40 out of the elbow 38 to release the seal of the elbow 38, and the compressed nitrogen in the gas cylinder 36 passes through the multi-way pressure reducing valve 37 and the elbow 38, and finally gradually fills into the enclosed space in the cover curtain 21. Since nitrogen has a lower density than air, nitrogen will float above the enclosed space, and as the amount of nitrogen filled increases, the air mixed with combustible gas in the cover curtain 21 is gradually discharged from the wiring hole of the bottom plate 11 below, so as to remove the amount of combustible gas in the cover curtain 21, avoid explosion, and protect the safety of personnel and frequency conversion components.

[0055] When an emergency occurs but the electromagnetic push rod 33 fails and cannot release the hook on the lifting ring 29 in time, the operator can break the transparent layer of the cover shell 35 and pull the emergency ropes 34 on both sides to manually release the hook on the lifting ring 29, so that the cover frame 20 and the cover curtain 21 can fall smoothly and nitrogen can be smoothly filled into the cover curtain 21.

[0056] Furthermore, when the pull rope 43 breaks when the curtain 21 falls, preventing the nitrogen from rushing into the space inside the curtain 21, the curtain 21 covers the outside of the frequency conversion component. Even if an explosion occurs, the high-strength textile on the outer layer of the curtain 21 can reduce the power of the explosion, thereby protecting the lives of personnel.

[0057] Embodiment 2:

[0058] like Figure 1 , Figure 2 and Figure 6 As shown, a support ring 46 is fixedly connected to the inner side of the cabinet door 14 near the cover frame 20, and a support rod 45 is movably connected to the support ring 46. A support rod groove 44 for accommodating the support rod 45 is opened on the cover frame 20 near the support rod 45, and a gasket 47 is fixedly connected to the end of the support rod 45.

[0059] By providing the support rod groove 44 and the support rod 45, when a person opens the cabinet door 14 to maintain or replace the frequency conversion equipment or other components inside the cabinet body 10, the support rod 45 can be inserted into the support rod groove 44, and the gasket 47 can be used to support the bottom side of the cover frame 20 to stably support the cover frame 20 at a high place, so as to prevent the cover frame 20 from accidentally falling and making maintenance work inconvenient. When the frequency converter is working normally, the support rod 45 naturally hangs on the inside of the cabinet door 14 without affecting the normal operation of other components.

[0060] The above-mentioned gas concentration sensor 13, fan 16, electromagnetic push rod 33, multi-way pressure reducing valve 37, etc. are mature existing technologies and are only shown in the drawings and will not be described in detail herein.

[0061] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0062] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0063] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. An explosion-proof electrical cabinet for an air compressor, characterized in that: The explosion-proof electrical cabinet for an air compressor comprises: a cabinet body (10), a bottom plate (11) fixedly connected to the bottom of the cabinet body (10), a mounting frame (12) fixedly connected to the bottom plate (11), and a cabinet door (14) rotatably connected to one side of the opening of the cabinet body (10); Sliding rods (22), two groups of sliding rods (22) are fixedly connected at both sides of the bottom plate (11) in the cabinet (10), and cover frames (20) are slidably connected to the two groups of sliding rods (22), and a flexible cover curtain (21) is sealed and fixedly connected between the cover frame (20) and the top of the cabinet (10); The cover frame (20) and the cover curtain (21) are sleeved on the outside of the mounting frame (12); a gas concentration sensor (13) is fixedly connected to the surface of the base plate (11); a wiring hole is provided on the base plate (11); and a cooling component is provided on the cabinet body (10) and the cabinet door (14).

2. An explosion-proof electrical cabinet for an air compressor according to claim 1, characterized in that: The bottom of the cabinet (10) is fixedly connected to two axles (28) located on both sides of the bottom plate (11), each of the axles (28) is rotatably connected to a reel (26), a coil spring (27) surrounding the outside of the axle (28) is connected between the reel (26) and the axle (28), a traction rope (23) is wound and fixed on the reel (26), and one end of the traction rope (23) away from the reel (26) is fixedly connected to the cover frame (20).

3. An explosion-proof electrical cabinet for an air compressor according to claim 2, characterized in that: A group of pulley seats (24) are fixedly connected to the bottom of the cabinet (10) near each winding wheel (26), and a pulley (25) is rotatably connected between each group of pulley seats (24), and each traction rope (23) passes around the outside of the corresponding pulley (25).

4. The explosion-proof electrical cabinet for an air compressor according to claim 1, characterized in that: Two lifting rings (29) are fixedly connected to both sides of the cover frame (20), and a fixed hook claw (30) is fixedly connected to the top of the cabinet (10) at a position corresponding to each lifting ring (29). A movable hook claw (31) is rotatably connected to each fixed hook claw (30). The fixed hook claw (30) and the movable hook claw (31) can buckle the lifting ring (29), and a connecting pin (32) is slidably connected to each movable hook claw (31). An electromagnetic push rod (33) is fixedly connected to the top of the cabinet (10) at a position corresponding to each connecting pin (32), and the extended end of each electromagnetic push rod (33) passes through the cabinet (10) and is fixedly connected to the corresponding connecting pin (32).

5. The explosion-proof electrical cabinet for air compressor according to claim 1, characterized in that: Two cover shells (35) are fixedly connected to the two sides of the cabinet (10) respectively, one end of each movable hook (31) is fixedly connected to an emergency cable (34), and each emergency cable (34) passes through the side wall of the cabinet (10) and is coiled and rolled up in the corresponding cover shell (35).

6. The explosion-proof electrical cabinet for air compressor according to claim 4, characterized in that: A multi-way pressure reducing valve (37) is fixedly connected to the top of the cabinet (10); a plurality of gas cylinders (36) are fixedly connected to one side of the multi-way pressure reducing valve (37); each gas cylinder (36) is filled with compressed nitrogen; a curved pipe (38) extending into the inner side of the curtain (21) is fixedly connected to the bottom of the multi-way pressure reducing valve (37); an end cap (39) is sleeved on one end of the curved pipe (38) away from the multi-way pressure reducing valve (37); a sealing plug (40) for sealing the curved pipe (38) is fixedly connected inside the end cap (39).

7. An explosion-proof electrical cabinet for an air compressor according to claim 6, characterized in that: A spring (41) surrounding the outer side of the curved tube (38) is connected between the end cover (39) and the end of the curved tube (38); a locking pin (42) is inserted between the curved tube (38) and the end cover (39); and a pull rope (43) is connected between the locking pin (42) and one side of the curtain (21).

8. The explosion-proof electrical cabinet for air compressor according to claim 1, characterized in that: The cooling component comprises an air intake shell (18), a plurality of air intake shells (18) are fixedly connected to the outside of the cabinet door (14), each of the air intake shells (18) is fixedly connected to a fan (16) connected to the inside of the cabinet body (10), a filter screen (17) with fine mesh is arranged between the air intake shell (18) and the fan (16), and a plurality of exhaust ports (19) are evenly distributed on the outer walls of both sides of the cabinet body (10).

9. The explosion-proof electrical cabinet for an air compressor according to claim 1, characterized in that: A support ring (46) is fixedly connected to the inner side of the cabinet door (14) near the cover frame (20); a support rod (45) is movably connected to the support ring (46); a support rod groove (44) for accommodating the support rod (45) is provided at a position near the support rod (45) on the cover frame (20); and a gasket (47) is fixedly connected to the end of the support rod (45).

10. The explosion-proof electrical cabinet for air compressor according to claim 1, characterized in that: The cover curtain (21) is a double-layer arrangement, wherein the outer layer of the cover curtain (21) is made of a high-strength textile material, and the inner layer of the cover curtain (21) is made of an airtight plastic material.

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