A switch cabinet

Abstract

The present application relates to a switch cabinet and the technical field of switch cabinet pressure relief, specifically comprising a pressure relief channel for discharging a fluid flow; a diffuser, arranged in the pressure relief channel, the diffuser having a substrate, the substrate having a plurality of first openings, the plurality of first openings being covered by a mesh device having a plurality of second openings, wherein a first group of the second openings are arranged transversely to a penetration direction of the diffuser, and a second group of the second openings are arranged parallel to the penetration direction of the diffuser, wherein cross sections of the second openings are respectively smaller than cross sections of the first openings; the diffuser comprises two, the two diffusers are arranged in parallel up and down, the substrate of the diffuser located above comprises three relatively independent frame connections, and the three frames can rotate around their respective central axes; a driving mechanism, drivingly connected to the frame, a sensor, for receiving a pressure value y of the diffuser located below.

Description

Technical Field

[0001] The present application belongs to the technical field of switch cabinet pressure relief, and specifically relates to a switch cabinet. Background Art

[0002] Switch cabinets are used in power transmission and distribution equipment to accommodate electrical devices and protect them from external interference. For example, electrical lines and cables, measuring and control devices, current contactors, relays, etc. are arranged in the switch cabinet as electrical devices.

[0003] The patent with publication number CN112020804 discloses a switch cabinet having a pressure relief channel for discharging a fluid flow and a diffuser arranged in the pressure relief channel, which can solve the problem that the diffuser can also be effective when the fluid flow is large. However, after the device is equipped with two diffusers, the problem that the fluid flow cannot smoothly pass through the second diffuser when the fluid flow is slightly smaller occurs. In other words, the device is suitable for situations where the larger fluid flow is above a certain specific value. When the fluid flow burst is below this specific value, after the fluid flow passes through the first diffuser, due to its deceleration effect, the fluid flow is difficult to push open the valve after passing through the second diffuser, which easily leads to the problem that the fluid flow cannot be discharged from the cabinet in time. Summary of the invention

[0004] In view of the above analysis, an embodiment of the present invention aims to provide a switch cabinet to solve one or more of the above problems existing in the prior art.

[0005] The object of the present invention is achieved in that:

[0006] A switch cabinet, comprising:

[0007] a pressure relief passage for discharging a fluid flow;

[0008] A diffuser arranged in the pressure relief channel, the diffuser having a base plate, the base plate having a plurality of first openings, the plurality of first openings being covered by a mesh device having a plurality of second openings, wherein a first group of the second openings are arranged transversely to a penetration direction of the diffuser, and a second group of the second openings are arranged parallel to the penetration direction of the diffuser, wherein a cross section of the second openings is respectively smaller than a cross section of the first openings;

[0009] The diffusers include two diffusers, which are arranged in parallel up and down, and the base plate of the diffuser located at the top includes three relatively independent frames connected to form, and the three frames can rotate around their respective central axes;

[0010] A driving mechanism is connected to the frame and configured to drive the three frames to rotate so that the gap between two adjacent frames varies between 0 and j, wherein the value of j is the gap size when the two adjacent frames are rotated to a vertical state;

[0011] A sensor, used for receiving a pressure value y of the diffuser located below;

[0012] The driving mechanism drives the frame to rotate a corresponding angle according to the pressure value y and the threshold.

[0013] In some embodiments provided in the present application, the threshold includes a first threshold a and a second threshold b, and the first threshold a is less than the second threshold b;

[0014] When the pressure value y is below the first threshold a, the driving mechanism drives the frame to rotate to a vertical state;

[0015] When the pressure value y is above the second threshold value b, the three frames are connected to each other, and the diffuser formed by the three frames is parallel to the diffuser located below;

[0016] When the pressure value y is between the first threshold a and the second threshold b, the driving mechanism drives the frame to rotate at an angle d between zero and ninety degrees.

[0017] In some embodiments provided in the present application, when the pressure value y is less than a third threshold value c, the driving mechanism drives the frame to rotate to a vertical state.

[0018] In some embodiments provided in the present application, the driving mechanism includes a first driving motor and a synchronous belt assembly, the first driving motor is drivingly connected to the middle portion of one of the side edges of the frame on the left, the synchronous belt assembly is drivingly connected to one of the frame in the middle and the frame on the right at the same time, the frame on the left is located above the electrical component, the first driving motor drives the frame on the left to rotate clockwise to a vertical state, and the synchronous belt assembly drives the frame in the middle and the frame on the right to rotate counterclockwise to a vertical state, so that the mesh devices on the frame on the left and the frame in the middle are on the opposite sides of the two frames.

[0019] In some embodiments provided in the present application, the synchronous belt assembly includes a synchronous gear, a synchronous belt, and a synchronous motor. The synchronous gear is connected to the middle frame and the middle of the frame on the right side. The synchronous belt is connected to the synchronous gears on the two frames. The driving end of the synchronous motor is connected to the synchronous belt.

[0020] In some embodiments provided in the present application, a cabinet is further included, wherein electrical components are arranged in the cabinet, the pressure relief channel is located inside the cabinet, a pressure relief port is opened on the top of the cabinet, a pressure relief door assembly is slidably connected to the pressure relief port, and the pressure relief door assembly is connected to the synchronous belt. When the synchronous belt moves, it can drive the pressure relief door assembly to move to open the pressure relief port.

[0021] In some embodiments provided in the present application, the pressure relief door assembly includes a cover plate, a slide rail and a connecting chain. A slide groove is opened on the top surface of the cabinet, the slide rail is arranged in the slide groove, the cover plate is slidably connected to the slide rail, the connecting chain is connected to the synchronous belt, an outlet is provided on the cover plate, and a closed door rotating around the outlet edge is provided at the outlet, and the closed door is relatively tightly connected to the outlet.

[0022] In some embodiments provided in the present application, the slide rail is tilted so that the height of one end of the slide rail close to the pressure relief port is lower than the height of the other relatively lower end, and a counterweight is provided on the cover plate, so that the cover plate can slide from the higher end of the slide rail to the lower end by itself.

[0023] In some embodiments provided in the present application, a spoiler mechanism is further provided on the frame, and the spoiler mechanism is located on opposite sides of two adjacent frames. When the frame is rotated to a vertical state, the spoiler mechanism can move and adhere to the edge of the mesh device at the bottom to prevent the fluid from flowing through the mesh device.

[0024] In some embodiments provided in the present application, the spoiler mechanism includes an extension piece, a protruding shaft, a ring, a second drive motor, a pull rope, a circular track, a track gear, and a third drive motor. The extension piece includes two mutually sleeved sleeves, and the two sleeves can be relatively telescopic. The proximal end of the extension piece is connected to the side of the frame through a rotating shaft, the protruding shaft is connected to the opposite distal end of the extension piece, the ring is rotatably connected to the protruding shaft, the second drive motor is arranged in the inner cavity on the side of the frame, the second drive motor is connected to the ring through the pull rope, the circular track is arranged in the inner cavity, the third drive motor drives the circular track to rotate through the track gear, the second drive motor is arranged on the circular track, the extension piece is arranged horizontally, the center of the circular track, the rotating shaft, and the extension piece are collinear, the extension piece is arranged between the two frames, and abuts against the other frame to form a sealed state between the gaps of the two frames.

[0025] The switch cabinet provided by the present invention mainly comprises: a pressure relief channel for discharging a fluid flow; a diffuser arranged in the pressure relief channel, wherein the diffuser has a substrate, the substrate has a plurality of first openings, and the plurality of first openings are covered by a mesh device having a plurality of second openings, wherein the first group of the second openings are arranged transversely to the penetration direction of the diffuser, and the second group of the second openings are arranged parallel to the penetration direction of the diffuser, wherein the cross-sections of the second openings are respectively smaller than the cross-sections of the first openings; the diffusers comprise two, the two diffusers are arranged in parallel up and down, and the substrate of the diffuser located above comprises three relatively independent frames connected to form, and the three frames can rotate around their respective central axes; a driving mechanism is connected to the frame driving, and is configured to drive the three frames to rotate, so that the gap between two adjacent frames varies between 0 and j, wherein the value of j is the gap size when the two adjacent frames are rotated to a vertical state; and is arranged in a floating manner; a sensor is used to receive the pressure value y of the diffuser located below;

[0026] Wherein, the driving mechanism drives the frame to rotate the corresponding angle according to the pressure value y and the threshold. By dividing the diffuser into three independent parts, each part realizes the function of the original diffuser, that is, the frame and its composition are the same as the diffuser structure and function, but they are independent and rotatable. On the basis of the diffuser realizing the original function, through the setting of the driving mechanism and the sensor, when the fluid flow passes through the diffuser below, the sensor detects the flow rate of the fluid flow. Through the set threshold, that is, the fluid flow above this threshold, it meets the characteristics of a larger fluid flow. At this time, the three frames constituting the upper diffuser are all arranged horizontally, and there is no gap between the two frames. After the fluid flow passes through the upper and lower diffusers, it is discharged from the pressure relief port after obtaining a better decompression effect. The fluid flow below the threshold, after identification by the sensor, controls the driving mechanism to drive the frame to rotate, so that the frame is in a vertical state. At this time, the upper diffuser no longer produces a decompression effect on the fluid flow, and can pass through the pressure relief port. Such a setting improves the adaptability of the diffuser to the fluid flow intensity range. Within a certain range, by rotating the frame setting, the fluid flow intensity is no longer limited to a larger one. For a smaller fluid flow, the fluid flow will not be unable to pass through the closed pressure relief port due to the secondary decompression effect of the diffuser. This is because the pressure relief port needs to be pushed open by the fluid flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0028] Figure 1 The structure of the switch cabinet provided by the present invention is schematically shown in FIG. Figure 1 ;

[0029] Figure 2 The structure of the switch cabinet provided by the present invention is schematically shown in FIG. Figure 2 ;

[0030] Figure 3 The structure of the switch cabinet provided by the present invention is schematically shown in FIG. Figure 3 ;

[0031] Figure 4 The structure of the switch cabinet provided by the present invention is schematically shown in FIG. Figure 4 ;

[0032] Figure 5 A schematic diagram of the change from a horizontal state to a hanging state of the extension member provided by the present invention;

[0033] Figure 6 A schematic diagram of the change of the extension member provided by the present invention from a hanging state to a pulled-up state;

[0034] Figure 7 This is a schematic diagram of the extending member provided by the present invention in the falling back state.

[0035] Reference numerals:

[0036] 10. Switch cabinet; 11. Pressure relief channel;

[0037] 20. Diffuser;

[0038] 30. driving mechanism; 301. first driving motor; 302. synchronous belt assembly;

[0039] 40. pressure relief port; 41. pressure relief door assembly; 411. cover plate; 412. slideway; 413. connecting chain; 414. closed door;

[0040] 50, spoiler mechanism; 501, extension piece; 502, protruding shaft; 503, second drive motor; 504, pull rope; 505, annular track; 506, third drive motor;

[0041] 60. Border; DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be noted that, in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined, separated, interchanged and / or rearranged with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] In the accompanying drawings, the size and relative size of components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments may be implemented differently, a specific process sequence may be performed in a different order than described. For example, two successively described processes may be performed substantially simultaneously or in an order opposite to the order described. In addition, the same reference numerals represent the same components.

[0044] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0045] Switch cabinets are used in power transmission equipment and power distribution equipment to accommodate electrical devices and protect them from external interference. As electrical devices, for example, electrical lines and cables, measuring and control devices, current contactors, relays, etc. are arranged in the switch cabinet 10. Here, the switch cabinet 10 surrounds a space, which is used as a so-called electrical space to accommodate the electrical devices to be closed. The switch cabinet 10 itself can seal the electrical space. In this case, the interior (electrical space) is completely sealed and isolated from the environment of the switch cabinet 10. In this case, it is called packaging, packaging housing, etc. The interior of the sealed isolated switch cabinet 10 already has an overpressure under operating conditions. Usually, the switch cabinet 10 is used for contact protection, so that the fluid can flow into the switch cabinet 10 or flow out of the switch cabinet 10 to a limited extent. Independently of this, a large fluid volume may be temporarily generated inside the switch cabinet 10, and the fluid volume must be discharged to avoid damage to the switch cabinet 10. For this reason, a pressure relief device is usually arranged in the wall of the switch cabinet 10, which is usually used to open a pressure relief opening (outlet). For example, a part of the pressure relief device can be a rupture plate, a flap, a valve or other elements which are controlled, in particular, according to a pressure difference. Depending on the design of the switch cabinet 10, the pressure relief device can achieve a sealed closure or a non-sealed isolation.

[0046] The pressure relief channel 11 is used to guide the fluid flow to the pressure relief device or directly to the pressure relief opening when necessary, for example, only by a coarse-mesh grille protection to prevent direct access to the opening, so that the fluid flow derived through the pressure relief channel 11 can be released into the environment of the switch cabinet 10. In the case of sealed isolation of the switch cabinet 10, the pressure relief channel 11 is also sealed and closed. The release of the pressure relief channel 11 can be controlled by the pressure relief device. The pressure relief channel 11 is a channel in which the flowing fluid is guided and directed. The pressure relief channel 11 can be formed, for example, by a part of the electrical space of the switch cabinet 10. For example, the pressure relief channel 11 can extend in the electrical space above the electrical equipment or the electrical equipment can also be directly arranged in the pressure relief channel 11, so as to achieve a particularly effective derivation of the flowing fluid from the electronic device. The fluid flow can be generated, for example, by an electrical fault in the interior of the switch cabinet 10, especially in the electrical space. The electrical fault is, for example, the failure of electrical insulation, so that an arc phenomenon occurs. For example, excessive voltage or aging of insulating materials can cause a short circuit or grounding on a cable or line. The energy released here occurs within a very short period of time, and the fluid in the switch cabinet 10, for example an insulating gas, for example air at atmospheric pressure, can also expand as a result. In addition, a plasma cloud may occur, which is produced when the insulating or conductive material evaporates. Accordingly, the fluid flow may contain particles, which, like the fluid under higher pressure, should also be discharged from the switch cabinet 10 into unimportant areas of the environment of the switch cabinet 10. For this purpose, a pressure relief channel 11 is used, which ultimately releases the fluid flow through a pressure relief opening into the environment of the switch cabinet 10.

[0047] The structure of the diffuser 20 of the present application is the same as that of the diffuser 20 in the aforementioned reference document, except that the diffuser 20 located at the top of the present application is composed of three independent components. However, optionally, the diffuser 20 can be composed of two independent components or more independent components.

[0048] A specific embodiment of the present invention, as Figure 1-7 As shown, a switch cabinet 10 is disclosed, comprising:

[0049] A pressure relief passage 11 for discharging a fluid flow;

[0050] A diffuser 20, arranged in the pressure relief channel 11, the diffuser 20 having a base plate, the base plate having a plurality of first openings, the plurality of first openings being covered by a mesh device having a plurality of second openings, wherein a first group of second openings are arranged transversely to a penetration direction of the diffuser 20, and a second group of second openings are arranged parallel to the penetration direction of the diffuser 20, wherein a cross section of the second openings is respectively smaller than a cross section of the first openings;

[0051] The diffusers 20 include two diffusers 20, which are arranged in parallel up and down. The base plate of the diffuser 20 located at the top includes three relatively independent frames 60 connected to form the three frames 60, which can rotate around their respective central axes.

[0052] The driving mechanism 30 is connected to the frame 60 and is configured to drive the three frames 60 to rotate so that the gap between two adjacent frames 60 varies between 0 and j, wherein the value of j is the gap size when the two adjacent frames 60 are rotated to a vertical state;

[0053] A sensor, used to receive a pressure value y of the diffuser 20 located below;

[0054] The driving mechanism 30 drives the frame 60 to rotate a corresponding angle according to the pressure value y and the threshold value.

[0055] By dividing the diffuser 20 into three independent parts, each part realizes the function of the original diffuser 20, that is, the frame 60 and its composition are the same as the diffuser 20 in structure and function, except that they are independent and rotatable. On the basis of the diffuser 20 realizing the original function, through the setting of the driving mechanism 30 and the sensor, when the fluid flow passes through the diffuser 20 below, the sensor detects the flow rate of the fluid flow. Through the set threshold, that is, the fluid flow above this threshold, it meets the characteristics of a larger fluid flow. At this time, the three frames 60 constituting the diffuser 20 above are all arranged horizontally, and there is no gap between the two frames 60. After the fluid flow passes through the upper and lower diffusers 20, it is discharged from the pressure relief port 40 after obtaining a better decompression effect. The fluid flow below the threshold, after identification by the sensor, controls the driving mechanism 30 to drive the frame 60 to rotate, so that the frame 60 is in a vertical state. At this time, the diffuser 20 above no longer produces a decompression effect on the fluid flow, and can pass through the pressure relief port 40. Such an arrangement improves the adaptability of the diffuser 20 to the fluid flow intensity range. Within a certain range, by rotating the frame 60, the intensity of the fluid flow is no longer limited to a larger one. For a smaller fluid flow, the fluid flow will not be unable to pass through the closed pressure relief port 40 due to the pressure reduction effect of the diffuser 20 again. This is because the pressure relief port 40 needs to be pushed open by the fluid flow.

[0056] In this embodiment, the sensor can be a pressure sensor. During installation, the diffuser 20 below is connected to the inner groove on the inner wall of the cabinet through a spring float, and the pressure sensor is installed between the upper surface of the diffuser 20 and the inner top surface of the inner groove. Another spring is connected to both sides of the pressure sensor respectively. The flow rate of the fluid flow is detected by the impact force generated when the fluid flow passes through the diffuser 20. The larger the value of the pressure sensor, the greater the flow rate of the fluid flow and the greater the pressure value y of the diffuser 20.

[0057] In some other embodiments, the sensor may be a flow velocity sensor, which can directly retrieve the flow velocity of the fluid flow, and can also obtain the flow rate of the fluid flow and the pressure value y of the diffuser 20. Same as above.

[0058] In some embodiments, the threshold includes a first threshold a and a second threshold b, and the first threshold a is less than the second threshold b;

[0059] When the pressure value y is below the first threshold a, the driving mechanism 30 drives the frame 60 to rotate to a vertical state;

[0060] When the pressure value y is above the second threshold value b, the three frames 60 are connected to each other, and the diffuser 20 formed by the three frames 60 is parallel to the diffuser 20 located below;

[0061] When the pressure value y is between the first threshold a and the second threshold b, the driving mechanism 30 drives the frame 60 to rotate at an angle d between zero and ninety degrees.

[0062] In this embodiment, two thresholds can be set. When the pressure value y is below the first threshold a, the driving mechanism 30 drives the frame 60 to rotate to a vertical state. At this time, the fluid flow passes through the diffuser 20 above without resistance, which is suitable for a smaller fluid flow burst. The larger value and smaller value of the fluid flow can be specified according to the application situation. For example, it can be formulated according to the residual amount of the fluid flow in the cabinet. For example, under the pressure reduction of the two diffusers 20, the final amount of the fluid flow remaining in the cabinet is less than 30%, and the second threshold b corresponding to the fluid flow and above can be determined as a larger value.

[0063] When the pressure value y is above the second threshold value b, the three frames 60 are connected to each other, and the diffuser 20 formed by the three frames 60 is parallel to the diffuser 20 located below.

[0064] When the pressure value y is between the first threshold value a and the second threshold value b, the driving mechanism 30 drives the frame 60 to rotate at an angle d, and d is between zero and ninety degrees. At this time, the driving mechanism 30 drives the frame 60 to rotate at an angle d, and the diffuser 20 above can form a certain pressure reduction and obstruction effect on the fluid flow, so that the amount of fluid flow between the two thresholds can also be well depressurized, and through the pressure relief port 40, the fluid flow of different sizes passing through the diffuser 20 is increased, and the range in which the diffuser 20 functions is increased.

[0065] In some embodiments, when the pressure value y is less than the third threshold value c, the driving mechanism 30 drives the frame 60 to rotate to a vertical state.

[0066] When the pressure value y is greater than the third threshold value c, the three frames 60 are connected to each other, and the diffuser 20 formed by the three frames 60 is parallel to the diffuser 20 located below.

[0067] In this embodiment, the frame 60 has only a vertical state and a horizontal state. In the vertical state, a small fluid flow is prevented from passing through the first diffuser 20, and the flow rate of the fluid flow is reduced too much, resulting in the problem of residual cabinet and the problem of not being able to break through the pressure relief port 40.

[0068] The pressure relief vent 40 in the present application uses fluid flow to force the closed door 414 to flip or to pass through the pressure relief vent 40 by destroying the closed door 414. If the amount of fluid flow or the pressure generated is small, the closed door 414 cannot be opened well.

[0069] The driving mechanism 30 includes a first driving motor 301 and a synchronous belt assembly 302. The first driving motor 301 is drivingly connected to the middle part of the side of a frame 60 on the left side. The synchronous belt assembly 302 is drivingly connected to a frame 60 in the middle and a frame 60 on the right side at the same time. The frame 60 on the left side is located above the electrical component. The first driving motor 301 drives the frame 60 on the left side to rotate clockwise to a vertical state. The synchronous belt assembly 302 drives the frame 60 in the middle and the frame 60 on the right side to rotate counterclockwise to a vertical state, so that the mesh devices on the frame 60 on the left side and the frame 60 in the middle are on the opposite sides of the two frames 60.

[0070] The mesh devices on the left frame 60 and the middle frame 60 are located on opposite sides of the two frames 60, so that the mesh devices of the two frames will not block the channel where the fluid flows through the two frames 60 in a vertical state.

[0071] The first driving motor 301 drives the frame 60 on the left side to rotate clockwise to a vertical state.

[0072] The synchronous belt assembly 302 includes a synchronous gear, a synchronous belt, and a synchronous motor. The synchronous gear is connected to the middle frame 60 and the middle of the right frame 60. The synchronous belt is connected to the synchronous gears on the two frames 60. The driving end of the synchronous motor is connected to the synchronous belt.

[0073] The synchronous motor drives the synchronous belt to drive the synchronous gears on the two frames 60 to rotate, so that the two frames 60 rotate simultaneously.

[0074] The cabinet also includes a cabinet in which electrical components are arranged. The pressure relief channel 11 is located inside the cabinet. A pressure relief port 40 is provided on the top of the cabinet. A pressure relief door assembly 41 is slidably connected to the pressure relief port 40. The pressure relief door assembly 41 is connected to a synchronous belt. When the synchronous belt moves, the pressure relief door assembly 41 can be driven to move to open the pressure relief port 40.

[0075] The pressure relief door assembly 41 includes a cover plate 411, a slide rail and a connecting chain 413. A slide groove 412 is opened on the top surface of the cabinet, the slide rail is set in the slide groove 412, the cover plate 411 is slidably connected to the slide rail, the connecting chain 413 is connected to the synchronous belt, an outlet is provided on the cover plate 411, and a closed door 414 rotating around the outlet edge is provided at the outlet, and the closed door 414 is relatively tightly connected to the outlet.

[0076] When the amount of fluid flow is small, the synchronous belt drives the two frames 60 to rotate to a vertical state. At the same time, the synchronous belt drives the connecting chain 413 to pull the cover plate 411 to a certain extent, so that the cover plate 411 slides away from the pressure relief port 40 through the slide rail to actively open the pressure relief port 40, and further allows a smaller fluid flow to be discharged from the cabinet through the pressure relief port 40. The closed door 414 set on the outlet can be broken by a larger flow of fluid.

[0077] The slide rail is tilted so that the height of one end of the slide rail near the pressure relief port 40 is lower than the height of the other end. A counterweight is provided on the cover plate 411, and the cover plate 411 can slide from the higher end of the slide rail to the lower end. In this way, after the fluid flows out of the cabinet, the synchronous belt drives the frame 60 to reset, so that the cover plate 411 can slide from the higher end of the slide rail to the lower end. The pressure relief port 40 is closed again.

[0078] In some embodiments, a spoiler mechanism 50 is also provided on the frame 60, and the spoiler mechanism 50 is located on the opposite sides of two adjacent frames 60. When the frame 60 is rotated to a vertical state, the spoiler mechanism 50 can move and stick to the edge of the mesh device at the bottom to prevent the fluid from passing through the mesh device.

[0079] The spoiler mechanism 50 includes an extension member 501, a protruding shaft 502, a collar, a second drive motor 503, a pull rope 504, a circular track 505, a track gear, and a third drive motor 506. The extension member 501 includes two sleeves that are sleeved on each other, and the two sleeves can be relatively retracted. The proximal end of the extension member 501 is connected to the side of the frame 60 through a rotating shaft, the protruding shaft 502 is connected to the distal end opposite to the extension member 501, the collar is rotatably connected to the protruding shaft 502, and the second drive motor 503 is arranged in the inner cavity on the side of the frame 60. In the figure, the second drive motor 503 is connected to the ring through a pull rope 504, the annular track 505 is set in the inner cavity, the third drive motor 506 drives the annular track 505 to rotate through the track gear, the second drive motor 503 is set on the annular track 505, the extension piece 501 is set horizontally, the center of the annular track 505, the rotating shaft, and the extension piece 501 are colinear, the extension piece 501 is set between the two frame frames 60, and abuts against the other frame 60 to form a sealing state between the gaps of the two frames 60.

[0080] When the second driving motor 503 is driven, the pull rope 504 can be tightened. When the third driving motor 506 drives the annular track 505 to rotate, the second driving motor 503 can be placed in different positions.

[0081] Referring to the accompanying drawings, when the frame 60 is horizontal, the second drive motor 503 is located at the top of the circular track 505. When the frame 60 needs to be rotated to a vertical state, the extension 501 is released first, and at the same time, the second drive motor 503 loosens the pull rope 504, so that the extension 501 rotates downward to a vertical state due to its own weight. The circular track 505 rotates, driving the second drive motor 503 to rotate, and at the same time, the second drive motor 503 tightens the pull rope 504, and the extension 501 forms a predetermined angle with the frame 60. The extension 501 is pressed against the mesh device to prevent the fluid from passing through the mesh device. At this time, the position of the second drive motor 503 is between the upper vertex and the left vertex of the original circular track 505, and the pull rope 504 is tangent to the circular track 505. The pulling effect of the pull rope 504 is optimal. When the frame 60 is reset to a horizontal state, the pull rope 504 is released, the extension member 501 falls back, and at the same time, it rotates to the right by a predetermined height under the action of gravity, and at the same time, under the principle of conservation of momentum, the extension member 501 will rotate to a position downward from the original horizontal state. At this time, the annular track 505 drives the second drive motor 503 to rotate between the upper vertex and the right vertex, and pulls the pull rope 504, so that the extension member 501 becomes a horizontal state, and then returns to the upper vertex. In this process, the pull rope 504 is located on the upper side of the extension member 501 in a horizontal state, and when the extension member 501 is close to the mesh device, the pull rope 504 is on the other side. At the same time, when the second drive motor 503 is displaced, the pull rope 504 caused by the different lengths can be controlled according to its moving position to move to the next position, that is, release or retract the predetermined length of the pull rope 504.

[0082] In the diffuser 20 above in the present application, unnecessary gaps caused by the added structure can be sealed using a seal.

[0083] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above are only specific implementation methods of the present application and are not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A switch cabinet, characterized in that: include: a pressure relief passage for discharging a fluid flow; A diffuser is arranged in the pressure relief channel, the diffuser has a base plate, the base plate has a plurality of first openings, the plurality of first openings are covered by a mesh device having a plurality of second openings, the cross-sections of the second openings are respectively smaller than the cross-sections of the first openings, wherein a first group of the second openings are arranged transversely to a penetration direction of the diffuser, and a second group of the second openings are arranged parallel to the penetration direction of the diffuser; The diffusers include two diffusers, which are arranged in parallel up and down, and the base plate of the diffuser located at the top includes three relatively independent frames connected to form, and the three frames can rotate around their respective central axes; A driving mechanism is connected to the frame and configured to drive the three frames to rotate so that the gap between two adjacent frames varies between 0 and j, wherein the value of j is the gap size when the two adjacent frames are rotated to a vertical state; A sensor, used for receiving a pressure value y of the diffuser located below; Wherein, the driving mechanism drives the frame to rotate a corresponding angle according to the pressure value y and the threshold value; The threshold includes a first threshold a and a second threshold b, and the first threshold a is smaller than the second threshold b; When the pressure value y is below the first threshold a, the driving mechanism drives the frame to rotate to a vertical state; When the pressure value y is above the second threshold value b, the three frames are connected to each other, and the diffuser formed by the three frames is parallel to the diffuser located below; When the pressure value y is between the first threshold a and the second threshold b, the driving mechanism drives the frame to rotate at an angle d between zero and ninety degrees.

2. The switch cabinet according to claim 1, characterized in that: When the pressure value y is less than the third threshold value c, the driving mechanism drives the frame to rotate to a vertical state.

3. The switch cabinet according to claim 2, characterized in that: The driving mechanism includes a first driving motor and a synchronous belt assembly, wherein the first driving motor is drivingly connected to the middle portion of a side edge of the frame on the left, and the synchronous belt assembly is drivingly connected to a frame in the middle portion and the frame on the right side at the same time, the frame on the left side is located above the electrical component, and the first driving motor drives the frame on the left side to rotate clockwise to a vertical state, and the synchronous belt assembly drives the frame in the middle portion and the frame on the right side to rotate counterclockwise to a vertical state, so that the mesh devices on the frame on the left side and the frame in the middle are on the opposite sides of the two frames.

4. The switch cabinet according to claim 3, characterized in that: The synchronous belt assembly includes a synchronous gear, a synchronous belt, and a synchronous motor. The synchronous gear is connected to the middle frame and the middle of the frame on the right side. The synchronous belt is connected to the synchronous gears on the two frames. The driving end of the synchronous motor is connected to the synchronous belt.

5. The switch cabinet according to claim 4, characterized in that: It also includes a cabinet, in which electrical components are arranged, the pressure relief channel is located inside the cabinet, a pressure relief port is opened on the top of the cabinet, a pressure relief door assembly is slidably connected to the pressure relief port, and the pressure relief door assembly is connected to the synchronous belt. When the synchronous belt moves, it can drive the pressure relief door assembly to move to open the pressure relief port.

6. The switch cabinet according to claim 5, characterized in that: The pressure relief door assembly includes a cover plate, a slide rail and a connecting chain. A slide groove is provided on the top surface of the cabinet, the slide rail is arranged in the slide groove, the cover plate is slidably connected to the slide rail, the connecting chain is connected to the synchronous belt, an outlet is provided on the cover plate, and a closed door rotating around the outlet edge is provided at the outlet, and the closed door is relatively tightly connected to the outlet.

7. The switch cabinet according to claim 6, characterized in that: The slide rail is tilted so that the height of one end of the slide rail close to the pressure relief port is lower than the height of the other relatively lower end. A counterweight is provided on the cover plate, and the cover plate can slide from the higher end of the slide rail to the lower end by itself.

8. The switch cabinet according to claim 2, characterized in that: The frame is also provided with a spoiler mechanism, which is located on opposite sides of two adjacent frames. When the frame is rotated to a vertical state, the spoiler mechanism can move and stick to the edge of the mesh device at the bottom to prevent the fluid from passing through the mesh device.

9. The switch cabinet according to claim 8, characterized in that: The spoiler mechanism includes an extension piece, a protruding shaft, a collar, a second drive motor, a pull rope, an annular track, a track gear, and a third drive motor. The extension piece includes two sleeves that are sleeved on each other, and the two sleeves can be relatively telescopic. The proximal end of the extension piece is connected to the side of the frame through a rotating shaft, and the protruding shaft is connected to the opposite distal end of the extension piece. The collar is rotatably connected to the protruding shaft. The second drive motor is arranged in an inner cavity on the side of the frame. The second drive motor is connected to the collar through the pull rope, and the annular track is arranged in the inner cavity. The third drive motor drives the annular track to rotate through the track gear. The second drive motor is arranged on the annular track. The extension piece is arranged horizontally, and the center of the annular track, the rotating shaft, and the extension piece are collinear. The extension piece is arranged between the two frames and abuts against the other frame to form a sealed state between the gaps of the two frames.

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