Highly-sealed gas-insulated switchgear

Abstract

The invention relates to the technical field of gas-insulated switchgears, in particular to a highly-sealed gas-insulated switchgear. A highly-sealed gas-insulated switchgear comprises a gas-insulated switchgear body, the gas-insulated switchgear body is fixedly connected with a gas tank, the gas tank is fixedly connected and communicated with a fixed sleeve, the gas-insulated switchgear body is provided with a pressure relief cavity located on the lower side of the gas tank, the fixed sleeve is located in the pressure relief cavity of the gas tank, and the fixed sleeve is slidably connected with a sealing disc. The sealing disc is fixedly connected with symmetrically-distributed connecting rings, the sides, away from the sealing disc, of the connecting rings are fixedly connected with a fixing disc in sliding connection with the fixing sleeve, and the fixing disc away from the air box is fixedly connected with a sleeve. When small-amplitude pressure fluctuation occurs in the gas tank, the pressure change in the gas tank is relieved only through self deformation of the elastic membrane, and when small-amplitude pressure fluctuation occurs in the gas tank, the sealing disc cannot move upwards or downwards, so that the situation that the sealing performance between the sealing disc and the fixed sleeve is reduced due to frequent movement of the sealing disc is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of gas filling cabinets, and in particular to a highly sealed gas filling cabinet. Background Art

[0002] The gas cabinet is also called an insulated electrical cabinet. The gas cabinet consists of an outer shell and an air box. The electrical components are installed in the air box and filled with high-pressure inert insulating gas (sulfur hexafluoride) to achieve the effect of arc extinguishing and improve the safety of the electrical components at work. When a circuit fault occurs in the electrical components in the existing gas cabinet, the pressure in the air box of the gas cabinet will continue to increase. The existing solution is to install a pressure relief valve on the air box. Only when the pressure in the gas cabinet increases to the opening pressure of the pressure relief valve will the pressure relief valve open and relieve the pressure on the air box. However, when the pressure relief valve relieves the pressure, part of the gas will be discharged, resulting in the temperature in the air box failing to reach the pressure before the pressure relief after recovery, as well as the gas environment before the pressure relief. The low-pressure state is also not conducive to the operation of the electrical components. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a highly sealed inflatable cabinet.

[0004] The specific technical scheme of the present invention is as follows: A highly sealed inflatable cabinet comprises an inflatable cabinet, the inflatable cabinet is fixedly connected to an air box, the air box is fixedly connected and connected to a fixed sleeve, the inflatable cabinet is provided with a pressure relief chamber located at the lower side of the air box, the fixed sleeve is located in the pressure relief chamber of the inflatable cabinet, a sealing disk is slidably connected in the fixed sleeve, the sealing disk is fixedly connected to a symmetrically distributed connecting ring, a side of the connecting ring away from the sealing disk is fixedly connected to a fixed disk slidably connected to the fixed sleeve, the fixed disk away from the air box is fixedly connected to a sleeve, a side of the sleeve away from the fixed disk is fixedly connected to a vertical plate, the vertical plate is fixedly connected to a symmetrically distributed first telescopic member, the symmetrically distributed first telescopic member is fixedly connected to a sliding plate on a side away from the vertical plate, the sliding plate is fixedly connected to limit blocks distributed at equal intervals, and the inflatable cabinet is provided with a detection mechanism for detecting the gas pressure therein.

[0005] According to a further technical solution, the detection mechanism includes a detection sleeve, which is fixedly connected to and connected to the air box, an elastic diaphragm is arranged inside the detection sleeve, the detection sleeve is slidably connected to a push rod that cooperates with the elastic diaphragm, the sliding connection between the push rod and the detection sleeve is not sealed, a first spring is fixedly connected between the push rod and the detection sleeve, and the detection sleeve is provided with a pressure storage component for storing the elastic potential energy of the elastic diaphragm.

[0006] A further technical solution is that the pressure storage component includes a buffer sleeve, which is fixedly connected to the side of the detection sleeve away from the air box through a support plate, a push plate is slidably connected in the buffer sleeve, a second spring is fixedly connected between the push plate and the push rod, the push plate is fixedly connected to a sliding rod slidably connected to the buffer sleeve, a through hole is provided on the side of the buffer sleeve close to the sliding rod, the cross-sectional area of ​​the buffer sleeve through hole is smaller than the cross-sectional area of ​​the push plate, and the sliding rod is provided with a limiting component for limiting the adjacent limiting blocks.

[0007] A further technical solution is that the limiting component includes a first rack, the first rack is fixedly connected to an end of the sliding rod away from the pushing plate, the buffer sleeve is fixedly connected to a limiting component cooperating with the limiting block through a supporting plate, the side of the limiting block away from the sliding plate is provided with a symmetrically distributed inclined surface, the side of the limiting component close to the sliding plate is provided with a folded surface cooperating with the inclined surface of the limiting block, the side of the limiting component away from the sliding plate is fixedly connected to a fixed plate, the fixed plate is fixedly connected to a symmetrically distributed second elastic component, the side of the symmetrically distributed second elastic component away from the fixed plate is fixedly connected to an L-shaped plate, the L-shaped plate is slidably connected to the limiting component, the L-shaped plate cooperates with the first rack, and the limiting component is provided with an extrusion component for reversely extruding the L-shaped plate.

[0008] According to a further technical solution, the extrusion assembly includes a first L-shaped rod, which is fixed to a side of the limiting member away from the limiting block, the first L-shaped rod is rotatably connected to a first gear meshing with the first rack, the limiting member is slidably connected to a second rack meshing with the first gear, and the second rack cooperates with the L-shaped plate.

[0009] According to a further technical solution, an inclined surface is provided on a side of the L-shaped plate away from the first rack, and the limit block is provided with a groove that cooperates with the L-shaped plate.

[0010] A further technical solution also includes a sealing mechanism, which is arranged on the fixed sleeve, and is used to increase the sealing between the sealing disk and the fixed sleeve. The sealing mechanism includes an L-shaped frame, and the L-shaped frame is fixed to the side of the fixed sleeve away from the air box. A rotating rod is rotatably connected in the sleeve, and a spline rod rotatably connected to the L-shaped frame is splined in the rotating rod. An annular airbag is arranged between the fixed disk and the adjacent sealing disk, and the rotating rod is provided with a pressurizing component for squeezing the annular airbag.

[0011] A further technical solution is that the pressure-applying component includes symmetrically distributed swivels, which are all fixed to the side of the swivel rod close to the sealing disk, the swivel is provided with circumferentially distributed bevel grooves, the connecting ring is slidably connected with a circumferentially distributed second L-shaped rod, the second L-shaped rod is slidably connected to the bevel grooves of adjacent swivels, the end of the second L-shaped rod away from the adjacent swivel is fixed with an arc plate cooperating with the adjacent annular airbag, and the sliding plate is provided with a locking assembly for fixing the spline rod.

[0012] According to a further technical solution, the locking assembly includes a locking piece, which is slidably connected to the L-shaped frame, a spring is fixedly connected between the locking piece and the L-shaped frame, the locking piece cooperates with the sliding plate, the spline rod is provided with a blind hole which cooperates with the locking piece, the spline rod is rotatably connected with a collar, a torsion spring is fixedly connected between the collar and the spline rod, the collar is provided with a slide groove, the L-shaped plate is fixedly provided with an extrusion rod which cooperates with the collar slide groove, and the extrusion rod is slidably connected to the fixed plate.

[0013] A further technical solution also includes a pressure relief mechanism, which is arranged on the L-shaped frame, and is used to reduce the pressure in the fixed sleeve. The pressure relief mechanism includes a folding plate, which is slidably connected to the L-shaped frame, and the folding plate cooperates with the sleeve. A third telescopic member is fixedly connected between the folding plate and the fixed sleeve, and a third rack is fixedly connected to the side of the folding plate away from the L-shaped frame. The fixed sleeve is fixedly connected and connected to a pressure relief pipe, and the pressure relief pipe of the fixed sleeve is rotatably connected to a rotating shaft, and the rotating shaft is fixedly connected to a second gear meshing with the third rack. A sphere is fixedly connected to one end of the rotating shaft away from the second gear, and the sphere is rotatably connected to the pressure relief pipe of the fixed sleeve, and the sphere is provided with a through hole.

[0014] The beneficial effects of the present invention are as follows: when a small pressure fluctuation occurs in the air box, the present invention alleviates the pressure change in the air box only by the deformation of the elastic diaphragm itself, and when a small pressure change occurs in the air box, the sealing disk does not move upward or downward, thereby avoiding frequent movement of the sealing disk to reduce the sealing between the sealing disk and the fixed sleeve, thereby improving the sealing of the inflatable cabinet; when the pressure in the air box changes too much, the pressure in the air box is changed by adjusting the position of the sealing disk to ensure that the pressure in the air box is not too high or too low, thereby protecting the electrical components in the air box from working normally; during the movement of the annular airbag, the annular airbag no longer squeezes the inner wall of the fixed sleeve, thereby avoiding friction between the annular airbag and the inner wall of the fixed sleeve during the movement of the annular airbag, thereby reducing the sealing between the annular airbag and the inner wall of the fixed sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a cross-sectional view of the three-dimensional structure of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the pressure relief mechanism of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the sealing mechanism of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the pressurizing component of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the detection mechanism of the present invention; Figure 7 It is an exploded view of the three-dimensional structure of the limit block and the limit member of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the locking assembly of the present invention; Fig. 9 It is a three-dimensional structural schematic diagram of parts such as a spline rod and a locking member of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the third rack, the second gear and other parts of the present invention.

[0016] In the accompanying drawings: 1-inflatable cabinet, 2-air box, 3-fixed sleeve, 301-sealing disk, 4-connecting ring, 5-fixed disk, 6-casing, 7-vertical plate, 8-first telescopic member, 9-sliding plate, 10-limiting block, 11-detection sleeve, 12-elastic diaphragm, 13-top rod, 14-first spring, 15-buffer sleeve, 16-sliding rod, 17-push plate, 18-second spring, 19-first rack, 20-limiting member, 21-fixed plate, 22- The second elastic member, 23-L-shaped plate, 24-first L-shaped rod, 25-first gear, 26-second rack, 27-L-shaped frame, 28-rotating rod, 29-spline rod, 30-annular airbag, 31-swivel, 32-second L-shaped rod, 33-arc plate, 34-locking member, 35-ring, 36-torsion spring, 37-extrusion rod, 38-folding plate, 39-third telescopic member, 40-third rack, 41-rotating shaft, 42-second gear, 43-sphere. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1: A highly sealed inflatable cabinet, such as Figure 1-Figure 6As shown, it includes an inflatable cabinet 1, an air box 2 is fixedly connected to the right part of the upper side of the inflatable cabinet 1, and a fixed sleeve 3 is fixedly connected and communicated with the lower side of the air box 2. A pressure relief chamber is arranged at the lower part of the right side of the inflatable cabinet 1. The inflatable cabinet 1 is also provided with other cavities, which are not described in detail in the present invention. The fixed sleeve 3 is located in the pressure relief chamber of the inflatable cabinet 1, and a sealing disk 301 is slidably connected in the fixed sleeve 3. When the pressure in the air box 2 increases, the sealing disk 301 moves downward to reduce the pressure in the air box 2. When the pressure in the air box 2 decreases, the sealing disk 301 moves upward to increase the pressure in the air box 2. Pressure, the sealing disk 301 is fixed with two connecting rings 4 which are symmetrically distributed in the upper and lower parts, the connecting ring 4 is fixed with a fixed disk 5 which is slidably connected with the fixed sleeve 3 on one side away from the sealing disk 301, the lower fixed disk 5 is fixed with a sleeve 6, the lower right part of the sleeve 6 is fixed with a vertical plate 7, the right side of the vertical plate 7 is fixed with two first telescopic parts 8 which are symmetrically distributed in the upper and lower parts, the right side of the two first telescopic parts 8 is fixed with a sliding plate 9, the right side surface of the sliding plate 9 is fixed with limit blocks 10 which are evenly spaced in the upper and lower parts, and the inflatable cabinet 1 is provided with a detection mechanism for detecting the gas pressure therein.

[0019] like Figure 2 , Figure 3 and Figure 6 As shown, the detection mechanism includes a detection sleeve 11, which is fixedly connected to and communicated with the lower side of the air box 2. The detection sleeve 11 is located on the right side of the fixed sleeve 3. An elastic diaphragm 12 is arranged in the detection sleeve 11. When the pressure in the air box 2 increases, the middle part of the elastic diaphragm 12 moves downward. When the pressure in the air box 2 decreases, the middle part of the elastic diaphragm 12 moves upward. The detection sleeve 11 is slidably connected with a push rod 13 that cooperates with the elastic diaphragm 12. The upper end of the push rod 13 contacts the middle part of the lower side of the elastic diaphragm 12, and the push rod 13 moves synchronously with the middle part of the elastic diaphragm 12. The sliding connection between the push rod 13 and the detection sleeve 11 is not sealed, ensuring that the elastic diaphragm 12 can deform freely. A first spring 14 is fixedly connected between the push rod 13 and the detection sleeve 11. Gas injection operation is required before the operation of the inflatable cabinet. The gas injection process causes the middle part of the elastic diaphragm 12 to move downward, and the elastic diaphragm 12 drives the push rod 13 to move downward, and the first spring 14 is stretched. After the gas injection process is completed, the first spring 14 maintains its stretched state. The first spring 14 is located on the outside of the push rod 13, and the detection sleeve 11 is provided with a pressure storage component for storing the elastic potential energy of the elastic diaphragm 12.

[0020] like Figure 3 and Figure 6As shown, the pressure storage component includes a buffer sleeve 15, which is fixed to the lower side of the detection sleeve 11 through a support plate, and a push plate 17 is slidably connected in the buffer sleeve 15, and a second spring 18 is fixed between the upper surface of the push plate 17 and the push rod 13. The push rod 13 moves downward and drives the push plate 17 to move downward through the second spring 18, and a slide rod 16 slidably connected to the lower surface of the push plate 17 is fixedly connected to the buffer sleeve 15. A through hole is provided on the right part of the lower side of the buffer sleeve 15, and the cross-sectional area of ​​the through hole of the buffer sleeve 15 is smaller than the cross-sectional area of ​​the push plate 17. When the push plate 17 moves upward, the external gas cannot quickly pass through the through hole of the buffer sleeve 15 to enter the lower side of the push plate 17, and therefore, the upward movement speed of the push plate 17 will slow down, and the slide rod 16 is provided with a limiting component for limiting the adjacent limiting block 10.

[0021] like Figure 6 and Figure 7 As shown, the limiting component includes a first rack 19, the first rack 19 is fixedly connected to the lower end of the sliding rod 16, the lower part of the left side of the buffer sleeve 15 is fixedly connected to a limiting member 20 that cooperates with the limiting block 10 through a support plate, the right side of the limiting block 10 is provided with two inclined surfaces symmetrically distributed up and down, and the left side of the limiting member 20 is provided with a folding surface that cooperates with the inclined surface of the limiting block 10. In the initial state, the right side of the middle limiting block 10 contacts the middle part of the left side of the limiting member 20, and the lower part of the right side of the limiting member 20 is fixedly connected to a fixing plate 21, and the upper surface of the fixing plate 21 is fixedly connected to two second elastic members 22 symmetrically distributed on the left and right, and the upper sides of the two second elastic members 22 are fixedly connected to an L-shaped plate 23, and the L-shaped plate 23 slides with the limiting member 20 The L-shaped plate 23 is dynamically connected, and the L-shaped plate 23 cooperates with the first rack 19. The first rack 19 contacts the right side of the upper surface of the L-shaped plate 23. The first rack 19 moves downward to squeeze the L-shaped plate 23 downward. An inclined surface is provided on the left side of the L-shaped plate 23. During the process of the limit block 10 being inserted into the middle part of the left side of the limit member 20, if the inclined surface on the lower side of the limit block 10 contacts the inclined surface on the left side of the L-shaped plate 23, the limit block 10 moves to the right to squeeze the L-shaped plate 23 downward. The limit block 10 is provided with a groove that cooperates with the L-shaped plate 23. When the upper part of the left side of the L-shaped plate 23 is stuck in the groove of the limit block 10, the limit block 10 is limited and cannot move. The limit member 20 is provided with an extrusion component for reversely extruding the L-shaped plate 23.

[0022] like Figure 6As shown, the extrusion assembly includes a first L-shaped rod 24, which is fixed to the right side of the limit member 20. The front part of the right side of the first L-shaped rod 24 is rotatably connected to the first gear 25 meshing with the first rack 19. The right side surface of the limit member 20 is slidably connected to the second rack 26 meshing with the first gear 25 through a T-shaped plate. In the initial state, the lower surface of the first rack 19 is flush with the lower surface of the second rack 26. The first rack 19 moves downward and drives the second rack 26 to move upward through the first gear 25. The second rack 26 cooperates with the L-shaped plate 23. The second rack 26 contacts the middle part of the upper surface of the L-shaped plate 23. The sliding rod 16 drives the first rack 19 to move upward, and the second rack 26 moves downward to extrude the L-shaped plate 23.

[0023] The gas box 2 is filled with sulfur hexafluoride gas at a certain pressure to protect the electrical components therein. In the following, "protective gas" refers to "sulfur hexafluoride gas". The protective gas in the gas box 2 will cause the pressure in the gas box 2 to increase or decrease due to temperature or other environmental reasons. Too much or too little pressure in the gas box 2 is not conducive to the normal operation of the electrical components therein. The current gas box 2 is generally equipped with a pressure relief valve. After the pressure in the gas box 2 increases, the pressure relief valve opens to discharge the pressure in the gas box 2, and the pressure relief valve only relieves the pressure in the gas box 2 through emergency pressure relief. During the pressure relief process, a part of the protective gas in the gas box 2 will also be discharged. When the pressure relief process is completed, the pressure in the gas box 2 cannot reach the initial pressure, resulting in the electrical components being unable to operate normally. Therefore, the pressure relief valve will not relieve the pressure when pressure fluctuations occur in the gas box 2. The pressure inside it, when the pressure fluctuation occurs in the air box 2, taking the increase in pressure in the air box 2 as an example, the specific operation is as follows: when the pressure in the air box 2 increases, in the initial state, since the upper part of the left side of the L-shaped plate 23 is inserted into the groove of the middle limit block 10, the middle limit block 10 is limited and cannot move, and the sealing plate 301 cannot move downward, the pressure in the air box 2 increases, causing the lower side of the elastic diaphragm 12 to squeeze the push rod 13 downward, and the first spring 14 in the stretched state continues to be stretched, and the push rod 13 drives the push plate 17 to move downward through the second spring 18, and the push plate 17 drives the slide rod 16 to move downward, and the push plate 17 squeezes the gas below it through the through hole of the buffer sleeve 15. Since the gas pressure in the air box 2 changes slowly, the push plate 17 will move slowly downward.

[0024] During the downward movement of the slide bar 16, the slide bar 16 drives the first rack 19 to move downward, and the first rack 19 drives the second rack 26 to move upward through the first gear 25. The first rack 19 presses the L-shaped plate 23 downward, and the two second elastic members 22 are compressed. If the pressure increase in the air box 2 is small, the L-shaped plate 23 will only move downward a short distance, and the upper part of the left side of the L-shaped plate 23 is not moved out of the groove of the middle limit block 10. The L-shaped plate 23 continues to limit the middle limit block 10 to avoid the sealing disk 301 from frequently moving up and down when the pressure in the air box 2 changes, resulting in the sealing disk 301 and the fixed sleeve 3. The sealing performance is reduced. If the pressure in the air box 2 is restored at this time, the middle part of the elastic diaphragm 12 moves upward, the first spring 14 is reset to drive the push rod 13 to move upward, the push rod 13 drives the push plate 17 and the slide bar 16 to move upward through the second spring 18, the slide bar 16 drives the first rack 19 to move upward, and the second elastic member 22 is reset to drive the L-shaped plate 23 to move upward. If the pressure in the air box 2 continues to increase at this time, the elastic diaphragm 12 is not enough to withstand the high pressure in the air box 2, so it is necessary to move the sealing disk 301 downward, so that the volume of the upper side of the sealing disk 301 in the fixed sleeve 3 increases, thereby reducing the pressure in the air box 2. The specific operation is as follows: The pressure in the air box 2 continues to increase, causing the L-shaped plate 23 to continue to move downward. When the upper part of the left side of the L-shaped plate 23 moves out of the slide groove of the middle limit block 10, the limit of the middle limit block 10 is released, and the middle part of the elastic diaphragm 12 moves upward to reset. At the same time, the pressure in the fixed sleeve 3 pushes the sealing disk 301 to move downward. The sealing disk 301 drives the sleeve 6 to move downward through the lower connecting ring 4 and the lower fixed disk 5. The sleeve 6 drives the vertical plate 7, the two first telescopic members 8, the sliding plate 9 and the five limit blocks 10 to move downward. , the inclined surfaces on the lower sides of the second and third limit blocks 10 and the third limit block 10 start to move leftwards by the folding surface of the limit member 20, and the two first telescopic members 8 are compressed. When the second limit block 10 moves downwards by half the longitudinal height of the limit block 10, as the limit block 10 continues to move downwards, when the second limit block 10 gradually gets stuck in the middle of the left side of the limit member 20, in the process of the middle part of the elastic diaphragm 12 moving upwards, the first spring 14 is reset so that the ejector rod 13 also moves upwards synchronously, and the second limit block 10 moves downwards by half the longitudinal height of the limit block 10. As the elastic diaphragm 12 resets quickly, the push rod 13 will quickly move upward to reset. The push rod 13 drives the push plate 17 to move upward through the second spring 18. Since the aperture of the through hole of the buffer sleeve 15 is small, the outside gas is not enough to quickly replenish the lower side of the push plate 17, and the upward resistance of the push plate 17 increases, causing it to move slowly upward. The second spring 18 is in a stretched state and has not reset. Therefore, when the second limit block 10 gradually snaps into the middle of the left side of the limit member 20 from top to bottom, the push plate 17 will only move upward a short distance. Distance, at the same time, the L-shaped plate 23 will only move upwards a short distance. In the process of the second limit block 10 gradually getting into the middle of the left side of the limit piece 20 from top to bottom, the lower side of the limit block 10 will squeeze the inclined surface on the left side of the L-shaped plate 23. The L-shaped plate 23 moves downward after being squeezed, and the second spring 18 is stretched. When the groove of the limit block 10 is aligned with the left side of the L-shaped plate 23, the second spring 18 is reset, and the L-shaped plate 23 moves upward to be inserted into the groove of the limit block 10 to limit it, thereby ensuring that the limit block 10 cannot move.

[0025] When the pressure in the air box 2 is reduced, the air box 2 is under negative pressure. At this time, the middle part of the elastic diaphragm 12 moves upward, and the first spring 14 in the stretched state resets to drive the push rod 13 to move upward. The push rod 13 drives the push plate 17 and the slide bar 16 to move upward through the second spring 18. The slide bar 16 drives the first rack 19 to move upward, and the second rack 26 moves downward to squeeze the L-shaped plate 23. Regardless of whether the pressure in the air box 2 increases or decreases, the L-shaped plate 23 will move downward. When the pressure in the air box 2 is too small, it is necessary to move the sealing plate 301 upward to increase the pressure in the air box 2. The continued reduction of the pressure in the air box 2 will cause the L-shaped plate 23 to release the limit on the adjacent limit block 10. After the limit of the limit block 10 is released, the elastic diaphragm 12 resets to cause the middle part thereof to move downward, and the sealing plate 301 moves upward. Then, the above steps are repeated so that the fourth limit block 10 from top to bottom is stuck in the middle part of the left side of the limit member 20, and the pressurization process is completed.

[0026] To sum up, when a small pressure fluctuation occurs in the air box 2, the pressure change in the air box 2 is alleviated only by the deformation of the elastic diaphragm 12 itself, and when a small pressure change occurs in the air box 2, the sealing disk 301 does not move upward or downward, so as to avoid frequent movement of the sealing disk 301 to reduce the sealing between the sealing disk 301 and the fixed sleeve 3. When the pressure in the air box 2 changes too much, the pressure in the air box 2 is changed by adjusting the position of the sealing disk 301 to ensure that the pressure in the air box 2 is not too large or too small, thereby protecting the electrical components in the air box 2 from working normally.

[0027] Embodiment 2: Based on embodiment 1, Figure 3-Figure 5 As shown, it also includes a sealing mechanism, which is arranged on the fixed sleeve 3. The sealing mechanism is used to increase the sealing between the sealing disk 301 and the fixed sleeve 3. The sealing mechanism includes an L-shaped frame 27. The L-shaped frame 27 is fixed to the left part of the lower side of the fixed sleeve 3. A rotating rod 28 is rotatably connected in the sleeve 6. A spline rod 29 is splined in the rotating rod 28. The lower end of the spline rod 29 is rotatably connected to the L-shaped frame 27. An annular airbag 30 is arranged between the fixed disk 5 and the adjacent sealing disk 301. The annular airbag 30 squeezes the inner wall of the fixed sleeve 3 to increase the sealing between the annular airbag 30 and the inner wall of the fixed sleeve 3. The rotating rod 28 is provided with a pressurizing component for squeezing the annular airbag 30.

[0028] like Figure 5 and Figure 6As shown, the pressure-applying component includes two swivels 31 symmetrically distributed in the upper and lower parts, and the two swivels 31 are fixedly connected to the upper side of the rotating rod 28. The swivels 31 are provided with circumferentially distributed oblique grooves. The connecting ring 4 is slidably connected with three circumferentially distributed second L-shaped rods 32. The side of the second L-shaped rod 32 close to the rotating rod 28 is slidably connected with the oblique groove of the adjacent swivel 31. The rotation of the swivel 31 drives the second L-shaped rod 32 to move through the oblique groove. The end of the second L-shaped rod 32 away from the adjacent swivel 31 is fixedly connected with an arc plate 33 that cooperates with the adjacent annular airbag 30. The curvature of the outer side surface of the arc plate 33 is equal to the curvature of the inner surface of the annular airbag 30, which is used to increase the contact area between the arc plate 33 and the annular airbag 30. The sliding plate 9 is provided with a locking assembly for fixing the spline rod 29.

[0029] like Figure 3 , Figure 8 and Fig. 9 As shown, the locking assembly includes a locking member 34, which is slidably connected to the L-shaped frame 27. The locking member 34 is composed of an L-shaped plate and an insertion rod. A spring is fixed between the locking member 34 and the L-shaped frame 27. The locking member 34 cooperates with the sliding plate 9. The right side of the locking member 34 contacts the sliding plate 9. The sliding plate 9 moves leftward to drive the locking member 34 to move leftward. A blind hole that cooperates with the locking member 34 is provided at the lower part of the left side of the spline rod 29. The insertion rod of the locking member 34 is inserted into the spline rod 29. In the blind hole, the spline rod 29 cannot rotate. The lower part of the outer side of the spline rod 29 is rotatably connected with a ring 35. A torsion spring 36 is fixed between the ring 35 and the spline rod 29. The torsion spring 36 is located on the outer side of the spline rod 29. A slide groove is provided at the front part of the right side of the ring 35. The L-shaped plate 23 is fixed with an extrusion rod 37 that cooperates with the slide groove of the ring 35. The extrusion rod 37 moves downward through the slide groove of the ring 35 to drive the ring 35 to rotate counterclockwise. The upper part of the right side of the extrusion rod 37 is slidably connected to the fixed plate 21.

[0030] In the initial state, the arc plate 33 squeezes the inner surface of the adjacent annular airbag 30 to ensure that the outer surface of the annular airbag 30 is in close contact with the inner wall of the fixed sleeve 3, further increasing the sealing performance between the sealing disk 301 and the fixed sleeve 3. When the pressure in the air box 2 changes slightly, the L-shaped plate 23 moves downward, and the L-shaped plate 23 drives the squeezing rod 37 to move downward. The squeezing rod 37 passes through the sliding groove of the collar 35 to make the collar 35 rotate counterclockwise. Since the locking piece 34 is inserted into the blind hole of the spline rod 29, the spline The rod 29 cannot rotate. At this time, the torsion spring 36 accumulates force. Before the sealing disk 301 moves upward or downward, the sliding plate 9 cannot move to the left. Therefore, the spline rod 29 cannot rotate. At the same time, the rotating rod 28 cannot drive the two rotating rings 31 to rotate. The arc plate 33 always squeezes the adjacent annular airbags 30 to ensure a high sealing performance between the annular airbags 30 and the fixed sleeve 3. When the limit of the limit block 10 is released, the sliding plate 9 moves to the left to drive the locking member 34 to move to the left to release the limit on the spline rod 29. The spring on the locking member 34 is compressed. Since the L-shaped plate 23 cannot move upward quickly at this time, the extrusion rod 37 cannot move upward and the collar 35 cannot rotate. At this time, the torsion spring 36 accumulates force to drive the spline rod 29 to rotate counterclockwise. The blind hole of the spline rod 29 gradually misaligns with the locking member 34. The spline rod 29 drives the two swivels 31 to rotate counterclockwise through the rotating rod 28. Taking the swivel 31 on the upper side as an example, the swivel 31 drives the three second L-shaped rods 32 to approach each other through the inclined groove thereon. The three second L-shaped rods 33 are moved closer to each other. 2 drives the three arc plates 33 to approach each other, releasing the squeezing of the annular airbag 30, and then the sealing disk 301 continues to move, and the sealing disk 301 drives the two annular airbags 30 to move synchronously through the two connecting rings 4 and the two fixing disks 5. During the movement of the annular airbag 30, the annular airbag 30 no longer squeezes the inner wall of the fixing sleeve 3, thereby avoiding the friction between the annular airbag 30 and the inner wall of the fixing sleeve 3 during the movement of the annular airbag 30, thereby reducing the sealing performance between the annular airbag 30 and the inner wall of the fixing sleeve 3.

[0031] After the sealing disk 301 is moved, the L-shaped plate 23 moves upward to drive the extrusion rod 37 to move upward, and the extrusion rod 37 drives the ring 35 to rotate clockwise. The ring 35 drives the spline rod 29 to rotate clockwise through the torsion spring 36. The spline rod 29 drives the two rotating rings 31 to rotate clockwise through the rotating rod 28. The arc plate 33 squeezes the annular airbag 30 away from the rotating rod 28, so that the annular airbag 30 seals the sealing disk 301 and the inner wall of the fixed sleeve 3. When the blind hole of the spline rod 29 is aligned with the locking piece 34, the spring reset on the locking piece 34 drives the locking piece 34 to move right to limit the spline rod 29.

[0032] Embodiment 3: Based on embodiment 2, Figure 3 and Fig.10As shown, it also includes a pressure relief mechanism, which is arranged on the L-shaped frame 27. The pressure relief mechanism is used to reduce the pressure in the fixed sleeve 3. The pressure relief mechanism includes a folding plate 38. The L-shaped frame 27 is provided with a rectangular groove. The folding plate 38 is slidably connected to the rectangular groove of the L-shaped frame 27. The right side of the lower part of the folding plate 38 is located below the sleeve 6. When the sleeve 6 moves downward, it will contact the right side of the lower part of the folding plate 38. A third telescopic member 39 is fixedly connected between the lower side of the folding plate 38 and the lower surface of the fixed sleeve 3. The upper side of the folding plate 38 is fixedly connected to the lower surface of the fixed sleeve 3. There is a third rack 40, and the upper part of the left side of the fixed sleeve 3 is fixedly connected and connected with a pressure relief pipe. The pressure relief pipe of the fixed sleeve 3 is rotatably connected with a rotating shaft 41. The front end of the rotating shaft 41 is fixedly connected with a second gear 42 meshing with the third rack 40. The third rack 40 moves downward to drive the second gear 42 to rotate. The rear end of the rotating shaft 41 is fixedly connected with a ball 43. The ball 43 is rotatably connected to the pressure relief pipe of the fixed sleeve 3. The ball 43 is provided with a through hole. In the initial state, the through hole of the ball 43 is perpendicular to the pressure relief pipe of the fixed sleeve 3, and the pressure relief pipe is blocked.

[0033] As the pressure in the air box 2 continues to increase, the sleeve 6 will continue to move downward. When the pressure in the air box 2 is too high, the sleeve 6 moves downward and contacts the folding plate 38, driving the folding plate 38 to move downward. The third telescopic member 39 is stretched, and the folding plate 38 drives the third rack 40 to move downward. The third rack 40 drives the second gear 42 to rotate, and the second gear 42 drives the ball 43 to rotate through the rotating shaft 41. The fixed sleeve 3 is connected with the pressure relief chamber in the inflatable cabinet 1, and the gas in the fixed sleeve 3 is discharged through the exhaust pipe and the through hole of the ball 43, and the fixed sleeve 3 is depressurized. When the pressure in the air box 2 is restored, the third telescopic member 39 is reset to drive the folding plate 38 to move upward, and the ball 43 rotates in the opposite direction to block the exhaust pipe of the fixed sleeve 3.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A highly sealed inflatable cabinet, characterized in that: The invention comprises an inflatable cabinet (1), wherein the inflatable cabinet (1) is fixedly connected to an air box (2), the air box (2) is fixedly connected to and communicated with a fixed sleeve (3), the inflatable cabinet (1) is provided with a pressure relief chamber located at the lower side of the air box (2), the fixed sleeve (3) is located in the pressure relief chamber of the inflatable cabinet (1), a sealing disk (301) is slidably connected in the fixed sleeve (3), the sealing disk (301) is fixedly connected to symmetrically distributed connecting rings (4), and the connecting ring (4) is fixedly connected to a side of the sealing disk (301) that is fixedly connected to the fixing sleeve. (3) a slidingly connected fixed plate (5), the fixed plate (5) away from the gas box (2) is fixedly connected with a sleeve (6), the sleeve (6) is fixedly connected with a vertical plate (7) on a side away from the fixed plate (5), the vertical plate (7) is fixedly connected with symmetrically distributed first telescopic members (8), the symmetrically distributed first telescopic members (8) are fixedly connected with a sliding plate (9) on a side away from the vertical plate (7), the sliding plate (9) is fixedly connected with limit blocks (10) distributed at equal intervals, and the inflatable cabinet (1) is provided with a detection mechanism for detecting the gas pressure therein.

2. A highly sealed inflatable cabinet according to claim 1, characterized in that: The detection mechanism comprises a detection sleeve (11), the detection sleeve (11) is fixedly connected to and communicated with the air box (2), an elastic diaphragm (12) is arranged in the detection sleeve (11), the detection sleeve (11) is slidably connected to a push rod (13) cooperating with the elastic diaphragm (12), the sliding connection between the push rod (13) and the detection sleeve (11) is not sealed, a first spring (14) is fixedly connected between the push rod (13) and the detection sleeve (11), and the detection sleeve (11) is provided with a pressure storage component for storing elastic potential energy of the elastic diaphragm (12).

3. A highly sealed inflatable cabinet according to claim 2, characterized in that: The pressure storage component includes a buffer sleeve (15), and the buffer sleeve (15) is fixedly connected to the side of the detection sleeve (11) away from the air box (2) through a support plate. A push plate (17) is slidably connected inside the buffer sleeve (15), and a second spring (18) is fixedly connected between the push plate (17) and the push rod (13). The push plate (17) is fixedly connected to a slide rod (16) slidably connected to the buffer sleeve (15). A through hole is provided on the side of the buffer sleeve (15) close to the slide rod (16), and the cross-sectional area of ​​the through hole of the buffer sleeve (15) is smaller than the cross-sectional area of ​​the push plate (17). The slide rod (16) is provided with a limiting component for limiting the adjacent limiting block (10).

4. A highly sealed inflatable cabinet according to claim 3, characterized in that: The limiting component comprises a first rack (19), the first rack (19) being fixedly connected to an end of the sliding rod (16) away from the push plate (17), the buffer sleeve (15) being fixedly connected to a limiting member (20) cooperating with the limiting block (10) via a support plate, the side of the limiting block (10) away from the sliding plate (9) being provided with symmetrically distributed inclined surfaces, the side of the limiting member (20) close to the sliding plate (9) being provided with a folding surface cooperating with the inclined surface of the limiting block (10), the limiting member A fixed plate (21) is fixedly connected to a side of the sliding plate (20) away from the sliding plate (9), and a symmetrically distributed second elastic member (22) is fixedly connected to the fixed plate (21). An L-shaped plate (23) is fixedly connected to a side of the symmetrically distributed second elastic member (22) away from the fixed plate (21), and the L-shaped plate (23) is slidably connected to the limiting member (20), and the L-shaped plate (23) cooperates with the first rack (19), and the limiting member (20) is provided with an extrusion component for reversely extruding the L-shaped plate (23).

5. A highly sealed inflatable cabinet according to claim 4, characterized in that: The extrusion assembly comprises a first L-shaped rod (24), the first L-shaped rod (24) being fixedly connected to a side of the limiting member (20) away from the limiting block (10), the first L-shaped rod (24) being rotatably connected to a first gear (25) meshing with the first gear rack (19), the limiting member (20) being slidably connected to a second gear rack (26) meshing with the first gear rack (25), and the second gear rack (26) being matched with the L-shaped plate (23).

6. A highly sealed inflatable cabinet according to claim 5, characterized in that: An inclined surface is provided on a side of the L-shaped plate (23) away from the first rack (19), and the limit block (10) is provided with a groove that cooperates with the L-shaped plate (23).

7. A highly sealed inflatable cabinet according to claim 5, characterized in that: The invention also comprises a sealing mechanism, which is arranged on the fixed sleeve (3) and is used to increase the sealing performance between the sealing disk (301) and the fixed sleeve (3). The sealing mechanism comprises an L-shaped frame (27), which is fixedly connected to a side of the fixed sleeve (3) away from the air box (2). A rotating rod (28) is rotatably connected inside the sleeve (6), and a spline rod (29) rotatably connected to the L-shaped frame (27) is splined inside the rotating rod (28). An annular air bag (30) is arranged between the fixed disk (5) and the adjacent sealing disk (301), and the rotating rod (28) is provided with a pressurizing component for squeezing the annular air bag (30).

8. A highly sealed inflatable cabinet according to claim 7, characterized in that: The pressurizing component comprises symmetrically distributed rotating rings (31), which are all fixedly connected to a side of the rotating rod (28) close to the sealing disk (301), and the rotating ring (31) is provided with circumferentially distributed inclined grooves. The connecting ring (4) is slidably connected with a circumferentially distributed second L-shaped rod (32), and the second L-shaped rod (32) is slidably connected with the inclined groove of the adjacent rotating ring (31). The end of the second L-shaped rod (32) away from the adjacent rotating ring (31) is fixedly connected with an arc plate (33) cooperating with the adjacent annular airbag (30), and the sliding plate (9) is provided with a locking component for fixing the spline rod (29).

9. A highly sealed inflatable cabinet according to claim 8, characterized in that: The locking assembly comprises a locking member (34), the locking member (34) is slidably connected to the L-shaped frame (27), a spring is fixedly connected between the locking member (34) and the L-shaped frame (27), the locking member (34) cooperates with the sliding plate (9), the spline rod (29) is provided with a blind hole limitedly matched with the locking member (34), the spline rod (29) is rotatably connected with a collar (35), a torsion spring (36) is fixedly connected between the collar (35) and the spline rod (29), the collar (35) is provided with a sliding groove, the L-shaped plate (23) is fixedly connected with an extrusion rod (37) that cooperates with the sliding groove of the collar (35), and the extrusion rod (37) is slidably connected to the fixed plate (21).

10. A highly sealed inflatable cabinet according to claim 1, characterized in that: The device further comprises a pressure relief mechanism, the pressure relief mechanism being arranged on the L-shaped frame (27), the pressure relief mechanism being used to reduce the pressure in the fixed sleeve (3), the pressure relief mechanism comprising a folding plate (38), the folding plate (38) being slidably connected to the L-shaped frame (27), the folding plate (38) cooperating with the sleeve (6), a third telescopic member (39) being fixedly connected between the folding plate (38) and the fixed sleeve (3), the folding plate (38) being away from the L-shaped frame (27) A third rack (40) is fixedly connected to one side of the fixed sleeve (3), the fixed sleeve (3) is fixedly connected to and communicated with a pressure relief pipe, the pressure relief pipe of the fixed sleeve (3) is rotatably connected to a rotating shaft (41), the rotating shaft (41) is fixedly connected to a second gear (42) meshing with the third rack (40), an end of the rotating shaft (41) away from the second gear (42) is fixedly connected to a ball (43), the ball (43) is rotatably connected to the pressure relief pipe of the fixed sleeve (3), and the ball (43) is provided with a through hole.

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