A cryogenic liquid storage tank with explosion-proof function

Abstract

The invention discloses a low-temperature liquid storage tank with an explosion-proof function, which relates to the field of low-temperature liquid storage tanks and effectively solves the problem that the existing device cannot quickly locate the position of the shell rupture, and cannot seal the position after the leakage position is determined, resulting in the disappearance of the vacuum degree of the vacuum layer between the shell and the inner tank, causing the temperature of the inner tank to rise, resulting in the acceleration of the movement of gas molecules in the inner tank, and the increase of the air pressure inside the inner tank, thereby causing the inner tank to explode again. The invention comprises a shell, the inner tank is arranged inside the shell, support rods are arranged on the left and right sides of the inner tank, the support rods on both sides are symmetrically arranged, the outer sides of the support rods are connected to the inner side of the shell, the inner side of the shell is provided with an interlayer, and the interlayer is provided with explosion-proof material, the right side of the shell is provided with a control box, the left side of the control box is provided with a plurality of conveying pipelines, and the conveying pipelines run through one side of the inner tank.

Description

Technical Field

[0001] The invention relates to the technical field of cryogenic liquid storage tanks, and in particular to a cryogenic liquid storage tank with an explosion-proof function. Background Art

[0002] Storage tanks are used to store refined chemicals such as acids, alkalis, alcohols, gases, and liquids. Storage tanks are widely used in North China. According to different materials, there are generally: polyethylene tanks, polypropylene tanks, fiberglass tanks, ceramic tanks, rubber tanks, stainless steel tanks, etc. In terms of the cost performance of storage tanks, steel-lined polyethylene tanks are the most superior. They have excellent corrosion resistance, high strength, and long life. The appearance can be manufactured into vertical, horizontal, transportation, mixing and other varieties. Most of the existing low-temperature liquid storage tanks are composed of inner containers and outer shells, and there is a sandwich between the inner container and the outer shell. When the inner container leaks, high-pressure liquefied gas will be filled into the sandwich, causing the outer shell to burst, causing greater economic losses.

[0003] Among them, the Chinese patent document with application number CN202021580012.3 discloses a low-temperature liquid storage tank with explosion-proof function, including an outer shell, an inner container and a sealing cover, the inner side of the outer shell is fixedly connected to the inner side, the sealing cover is installed on the top of the inner container, the outer shell is welded to the bottom of the outer shell, the inner side of the outer shell is fixedly connected to a first connecting pipe, the bottom end of the first connecting pipe is installed with a connecting block, the upper surface of the connecting block is integrally formed with a plunger, the bottom end of the outer shell is provided with a through hole, the outer side of the sealing cover is fixedly connected to a cover shell, the top of the cover shell is detachably connected to a cover plate, the center of the upper surface of the cover plate is connected to a second connecting pipe, the top of the second connecting pipe is fixedly connected to a joint, the outer side of the second connecting pipe is installed with an airtight valve, sleeves are installed on both sides of the first connecting pipe, and one end of the sleeve is fixedly connected to a mounting seat, so that the gas leaks out from the through hole opened at the bottom end of the outer shell to avoid the shell from bursting, thereby reducing economic losses.

[0004] Although the rupture caused by excessive internal pressure in the outer shell can be prevented during use, the position of the rupture in the outer shell cannot be quickly located, and the position cannot be sealed after the leakage is determined, resulting in the disappearance of the vacuum degree of the vacuum layer between the outer shell and the inner liner, causing the temperature of the inner liner to rise, resulting in faster movement of gas molecules in the inner liner, and increased air pressure inside the inner liner, thereby causing the inner liner to explode again.

[0005] Therefore, the present invention provides a cryogenic liquid storage tank with explosion-proof function to solve the above problems. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a low-temperature liquid storage tank with an explosion-proof function, which effectively solves the problem that the position of the rupture of the outer shell cannot be quickly located, and the position cannot be sealed after the leakage position is determined, resulting in the disappearance of the vacuum degree of the vacuum layer between the outer shell and the inner tank, causing the temperature of the inner tank to rise, resulting in the acceleration of the movement of gas molecules in the inner tank, and the increase of the air pressure inside the inner tank, thereby causing the inner tank to explode again.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: the present invention comprises a shell, an inner liner is arranged inside the shell, support rods are arranged on both sides of the inner liner, the support rods on both sides are arranged symmetrically, the outer sides of the support rods are connected to the inner side of the shell, an interlayer is arranged inside the shell, explosion-proof material is arranged inside the interlayer, a control box is arranged on the right side of the shell, a plurality of conveying pipes are arranged on the left side of the control box, the conveying pipes run through one side of the inner liner, a support plate is arranged on the top of the shell, and a fence is arranged on the top of the support plate;

[0008] Two detection rings are sleeved on the outer side of the inner tank, and the two detection rings are arranged symmetrically on the left and right. Two connecting plates are arranged on the outer side of each detection ring, and the two connecting plates are arranged symmetrically up and down. A hydraulic multi-stage telescopic rod is arranged on the outer side of each connecting plate, and the outer side of the hydraulic multi-stage telescopic rod is connected to the inner side of the outer shell, and air pressure probes are arranged on the left and right sides of the middle of the detection ring;

[0009] A control component is provided on the inner side of the detection ring, an electric multi-stage telescopic rod is provided on the inner side of the control component, a square plate is provided on the inner side of the electric multi-stage telescopic rod, a cylindrical rod is provided on the outer side of the control component, a pressure regulating component is provided on one side of the cylindrical rod, the top of the pressure regulating component is connected to an outer air bag, the bottom of the pressure regulating component is connected to an inner air bag, a plurality of circular holes are arranged on the circumference of the inner side of the detection ring, a connecting component is provided on the outer side of the cylindrical rod, and the connecting component cooperates with the circular hole.

[0010] Preferably, the control component includes a second piston plate, the outer side of the second piston plate is interconnected with the inner side of the electric multi-stage telescopic rod, the outer side of the second piston plate is provided with a second cylinder, the inner side of the second cylinder is interconnected with the detection ring, the interior of the second cylinder is provided with a spring, the outer side of the spring is interconnected with the inner side of the second piston plate, and an electromagnetic valve is provided at the inner bottom of the second cylinder.

[0011] Preferably, a connecting pipe is provided on the inner side of the second cylinder, the connecting pipe passes through one side of the detection ring, a first cylinder is provided on the other side of the connecting pipe, the bottom of the first cylinder is connected to the inside of the detection ring, and a first piston plate is provided inside the first cylinder.

[0012] Preferably, a spur rack is provided on the top of the first piston plate, a first gear is meshed on the top of the spur rack, a pin is provided inside the first gear, a support block is connected to the middle of the pin, the support block is interconnected with the inside of the detection ring, a second gear is connected to the other side of the pin, an arc-shaped rack is meshed on the bottom of the second gear, and the inner side of the arc-shaped rack is interconnected with the connecting component.

[0013] Preferably, the connecting component includes an annular plate, which is rotatably connected to the detection ring, the outer side of the annular plate is interconnected with the arc-shaped rack, the inner circumference of the annular plate is provided with a plurality of vertical slide grooves, the vertical slide grooves are interconnected with the cylindrical rod, the outer circumference of the annular plate is provided with a plurality of circular tubes, and the outer sides of the circular tubes are provided with blocking plates.

[0014] Preferably, the pressure regulating assembly includes a moving rod, the rear side of which is interconnected with a cylindrical rod, a rectangular rod is provided on the outer side of the moving rod, a plurality of transverse grooves are arranged on the inner circumference of the detection ring, and the rectangular rod and the transverse grooves are interconnected.

[0015] Preferably, a sealing plate is provided on the front side of the cylindrical rod, a rectangular tube is provided on the outer side of the sealing plate, and the rectangular tube is connected to the inside of the detection ring.

[0016] Preferably, the top of the rectangular tube is connected to the outer airbag, the bottom of the rectangular tube is connected to the inner airbag, the outer airbag is connected to the outer side of the detection ring, the inner airbag is connected to the inner side of the detection ring, a first air pressure sensor is provided inside the outer airbag, and a second air pressure sensor is provided inside the inner airbag.

[0017] Preferably, two fixing rings are provided on the outer side of the shell, the two fixing rings are arranged symmetrically on the left and right, and a bottom plate is provided on the bottom of the fixing rings.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention controls the expansion state of the outer airbag and the inner airbag through the cooperation of the control component and the pressure regulating component, and controls the closing state of the circular hole through the cooperation of the connecting component. By separately controlling the movement of the two detection rings, before use, the air pressure between the shell and the inner liner is monitored through the expansion of the inner and outer airbags and the closing of the circular hole, in conjunction with the movement of the two detection rings, so as to infer whether there is a rupture or leakage of the shell or the inner liner, and quickly identify the location of the leakage point, which is convenient for workers to inspect and repair local areas.

[0020] 2. During use, the pressure change of the cavity between the shell and the liner is monitored in real time through the air pressure probe. If the air pressure increases, it indicates that the shell or the liner is damaged. Through the expansion of the inner and outer air bags and the closing of the circular hole, combined with the movement of the two detection rings, the detection speed is accelerated by the method of dividing the detection interval into two halves, and the rupture position of the shell or the liner is quickly located. Then, the damaged position is quickly blocked by the outer and inner air bags on one side to reduce the rupture of the shell caused by the leakage of liquefied gas. At the same time, the first and second air pressure sensors are used to identify the damage of the shell or the liner, and targeted treatment is carried out later to ensure the airtightness of the device before use and the safety during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram on the right side of the overall structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the shell of the present invention.

[0024] Figure 4 For the present invention Figure 3 Schematic diagram of the partial enlarged structure of part A in the middle.

[0025] Figure 5 It is a schematic diagram of the matching structure of the hydraulic multi-stage telescopic rod and the detection ring of the present invention.

[0026] Figure 6 It is a schematic diagram of the coordination structure of the detection ring, the outer airbag and the inner airbag of the present invention.

[0027] Figure 7 It is a schematic diagram of the matching structure of the annular plate and the circular hole of the present invention.

[0028] Figure 8 It is a schematic diagram of the matching structure of the blocking plate and the circular hole of the present invention.

[0029] Fig. 9 It is a schematic diagram of the matching structure of the connecting pipe and the moving rod of the present invention.

[0030] Fig.10 For the present invention Fig. 9 Schematic diagram of the partial enlargement of part B in the middle.

[0031] Fig.11 It is a schematic diagram of the matching structure of the electric multi-stage telescopic rod and the second gear of the present invention.

[0032] Fig.12 It is a plane schematic diagram of the shortest distance between two detection rings of the present invention.

[0033] Numbers in the figure: 101, support plate; 102, fence; 103, shell; 104, fixing ring; 105, bottom plate; 106, liner; 107, interlayer; 108, support rod; 109, control box; 201, hydraulic multi-stage telescopic rod; 202, connecting plate; 203, detection ring; 204, annular plate; 205, round tube; 206, blocking plate; 207, vertical slide; 208, round hole; 209, horizontal slide; 301, cylindrical rod; 302, rectangular rod ; 303, moving rod; 304, sealing plate; 305, rectangular tube; 306, outer airbag; 307, inner airbag; 401, connecting pipe; 402, first cylinder; 403, first piston plate; 404, straight rack; 405, first gear; 406, support block; 407, second gear; 408, arc rack; 501, square plate; 502, electric multi-stage telescopic rod; 503, second piston plate; 504, second cylinder; 505, spring; 506, solenoid valve. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-Figure 12 The specific implementation modes of the present invention are described in further detail.

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] Depend on Figure 1-Figure 12The present invention proposes a low-temperature liquid storage tank with explosion-proof function: the present invention comprises an outer shell 103, the outer surface of the detection ring 203 is coated with anti-oxidation paint to increase the corrosion resistance of the detection ring 203, an inner shell 103 is provided with an inner liner 106, the inner liner 106 is used to store liquefied gas (oxygen, nitrogen, etc.), support rods 108 are provided on the left and right sides of the inner liner 106, the support rods 108 on both sides are arranged symmetrically, and four support rods 108 are provided on each side to provide support for the inner liner 106, the outer side of the support rods 108 is connected to the inner side of the outer shell 103, an interlayer 107 is provided inside the outer shell 103, and explosion-proof material is provided inside the interlayer 107, which is the prior art and will not be described in detail here, a control box 109 is provided on the right side of the outer shell 103, and a plurality of conveying pipes are provided on the left side of the control box 109, and the conveying pipes pass through one side of the inner liner 106, and the outer shell 10 3 is provided with a support plate 101 on the top, and a fence 102 is provided on the top of the support plate 101. A variety of devices are provided on the top of the support plate 101 to facilitate the use of the cryogenic storage tank. The fence 102 and the ladder can facilitate the maintenance of the staff. The control box 109 can control the vent valve, the full valve, the balance valve, the upper and lower valves of the liquid level gauge, etc., open the upper liquid inlet valve, and slowly fill the liquid into the liquid oxygen storage tank from the top. After the vent valve is stably exhausted, the filling speed can be accelerated, and the balance valve is closed. After the liquid level gauge is displayed, the lower liquid inlet valve is opened. At this time, the upper liquid inlet valve can be closed, and the liquid can be fed from the bottom alone, or from the top and bottom at the same time. When the liquid flows out of the full valve, the filling is completed, and the flow direction of the liquid oxygen in the delivery pipeline inside the inner tank 106 is controlled by the control box 109 (these valves are not shown in the figure, which is the prior art), and the adjustment of the liquid oxygen content inside the inner tank 106 is completed.

[0038] Two fixing rings 104 are provided on the outside of the shell 103. The two fixing rings 104 are arranged symmetrically on the left and right. The fixing rings 104 can fix the two ends of the shell 103. A bottom plate 105 is provided at the bottom of the fixing ring 104. The bottom plate 105 can support the two fixing rings 104 to increase the stability of the device.

[0039] Embodiment 2:

[0040] On the basis of Example 1, this embodiment takes into account that the device cannot quickly locate the ruptured position of the outer shell 103, and cannot seal the position after determining the leakage position, resulting in the disappearance of the vacuum degree of the vacuum layer between the outer shell 103 and the inner liner 106, causing the temperature of the inner liner 106 to rise, resulting in the acceleration of the movement of gas molecules in the inner liner 106, and the increase of the air pressure inside the inner liner 106, thereby causing the inner liner 106 to explode again.

[0041] Specifically, Figure 5 , Figure 6As shown, two detection rings 203 are sleeved on the outer side of the inner liner 106, and the detection rings 203 can move left and right on the surface of the inner liner 106. The two detection rings 203 are arranged symmetrically on the left and right, and two connecting plates 202 are arranged symmetrically up and down on the outer side of each detection ring 203. A hydraulic multi-stage telescopic rod 201 is provided on the outer side of each connecting plate 202. The hydraulic multi-stage telescopic rod 201 is composed of a plurality of piston-type hydraulic cylinders. The piston rod of the previous stage piston cylinder is the cylinder barrel of the next stage piston cylinder. When the pressure oil enters from the rodless cavity, the cylinder barrel with the largest effective piston area begins to extend. When it reaches the end point, , the cylinder with the second largest piston effective area begins to extend, and the order of telescopic hydraulic extension is from large to small, so that a very long working stroke can be obtained. The outer side of the hydraulic multi-stage telescopic rod 201 is connected to the inside of the shell 103, and the hydraulic multi-stage telescopic rod 201 pushes the connecting plate 202 to move a long distance, so as to realize the independent control of the moving distance of the two detection rings 203. Air pressure probes are provided on the left and right sides of the middle part of the detection ring 203. The air pressure probes on both sides of the detection ring 203 can respectively detect the air pressure on both sides of the detection ring 203, so as to identify the leakage of the shell 103 and the inner tank 106.

[0042] like Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the inner side of the detection ring 203 is provided with a control component, and the inner side of the control component is provided with an electric multi-stage telescopic rod 502, which can be independently controlled to perform long-distance telescopic extension. The inner side of the electric multi-stage telescopic rod 502 is provided with a square plate 501, and the square plate 501 can be used to contact the opposite detection ring 203. The heights of the two square plates 501 and the electric multi-stage telescopic rod 502 are different, as shown in FIG. Figure 3 As shown, the height of the electric multi-stage telescopic rod 502 on the right is higher than that of the electric multi-stage telescopic rod 502 on the left. A cylindrical rod 301 is provided on the outside of the control component. The control component can drive the cylindrical rod 301 to move back and forth. A pressure regulating component is provided on one side of the cylindrical rod 301. The top of the pressure regulating component is connected to an outer air bag 306. The bottom of the pressure regulating component is connected to an inner air bag 307. The pressure regulating component can control the expansion amount of the outer air bag 306 and the inner air bag 307. The inner circumference of the detection ring 203 A number of circular holes 208 are arranged, and the circular holes 208 can ensure the gas fluidity of the cavity between the outer shell 103 and the inner liner 106, so that the air pressure between the outer shell 103 and the inner liner 106 is the same. A connecting component is provided on the outer side of the cylindrical rod 301, and the connecting component cooperates with the circular hole 208. The connecting state of the circular hole 208 can be controlled through the connecting component to realize the opening and closing of the circular hole 208, and then the movement of the two detection rings 203 is coordinated to detect the leakage of the outer shell 103 or the inner liner 106.

[0043] like Figure 7 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 As shown, the control component includes a second piston plate 503, the outer side of the second piston plate 503 is connected to the inner side of the electric multi-stage telescopic rod 502, when the square plate 501 contacts the side of the detection ring 203 on the opposite side, if the detection ring 203 on the opposite side continues to move closer to the side, it will squeeze the electric multi-stage telescopic rod 502 to move outward, or when the square plate 501 contacts the side of the detection ring 203 on the opposite side, the electric multi-stage telescopic rod 502 is actively controlled to extend, so that the second piston plate 503 can move outward from the inside of the second cylinder 504, and the outer side of the second piston plate 503 is provided with The second cylinder 504, the inner side of the second cylinder 504 is connected to the detection ring 203, the air tightness between the second piston plate 503 and the second cylinder 504 is maintained well, when the second piston plate 503 moves outward, the gas inside the second cylinder 504 can be squeezed out, the second cylinder 504 is provided with a spring 505 inside, the outer side of the spring 505 is connected to the inner side of the second piston plate 503, the spring 505 can provide power for the reset of the second piston plate 503, the inner bottom of the second cylinder 504 is provided with a solenoid valve 506, the solenoid valve 506 can actively control the second cylinder 504. The connection state between the second cylinder 504 and the outside world, when the solenoid valve 506 is opened, the gas inside the second cylinder 504 will be discharged through the solenoid valve 506, when the solenoid valve 506 is closed, the gas inside the second cylinder 504 will enter the first cylinder 402 through the connecting pipe 401. In most cases, the solenoid valve 506 is closed. When a special situation occurs, the solenoid valve 506 is quickly opened to discharge the gas between the outer airbag 306 and the inner airbag 307 to reduce the local high pressure of the shell. The inner side of the second cylinder 504 is provided with a connecting pipe 401, and the connecting pipe 401 runs through A first cylinder 402 is provided on one side of the detection ring 203 and the other side of the connecting pipe 401. The bottom of the first cylinder 402 is connected to the inside of the detection ring 203. A first piston plate 403 is provided inside the first cylinder 402. The first piston plate 403 and the first cylinder 402 are in close contact to ensure air tightness, and the friction between the first piston plate 403 and the first cylinder 402 is relatively large. Therefore, when the solenoid valve 506 is opened, due to the large friction between the first piston plate 403 and the first cylinder 402, the gas inside the second cylinder 504 is discharged through the solenoid valve 506.

[0044] like Fig. 9 , Fig.10 , Fig.11As shown, a spur rack 404 is provided on the top of the first piston plate 403, and a first gear 405 is meshed on the top of the spur rack 404. The first piston plate 403 drives the spur rack 404 to move, and the spur rack 404 can drive the meshed first gear 405 to rotate. A pin is provided inside the first gear 405, and a support block 406 is connected to the middle of the pin, and the pin can rotate on the top of the support block 406. The support block 406 is connected to the inside of the detection ring 203, and the support block 406 is fixedly connected to the inside of the detection ring 203. A second gear 407 is connected to the other side of the pin, and an arc-shaped rack 408 is meshed at the bottom of the second gear 407. The inner side of the arc-shaped rack 408 is interconnected with a connecting component, and the pin drives the second gear 407 to rotate, and the second gear 407 drives the meshed arc-shaped rack 408 to move, and the arc-shaped rack 408 drives the fixedly connected annular plate 204 to move in a circle.

[0045] like Figure 7 , Figure 8 , Fig. 9 As shown, the connecting component includes an annular plate 204, which is rotatably connected to the detection ring 203, and the annular plate 204 can move in a circle inside the detection ring 203. The outer side of the annular plate 204 is connected to the arc rack 408, and the arc rack 408 is fixedly connected to the annular plate 204. A plurality of vertical slide grooves 207 are arranged on the inner circumference of the annular plate 204, and the vertical slide grooves 207 are connected to the cylindrical rod 301. The cylindrical rod 301 can reciprocate inside the vertical slide grooves 207, and the cylindrical rod 301 can only reciprocate horizontally. When the annular plate 204 rotates, When the annular plate 204 moves, the cylindrical rod 301 is driven to move. A plurality of circular tubes 205 are arranged on the outer circumference of the annular plate 204. The outer sides of the circular tubes 205 are provided with blocking plates 206. In the initial state, the circular tubes 205 and the circular holes 208 are aligned with each other. At this time, the consistency of the air pressure in the inner cavity of the outer shell 103 and the inner liner 106 can be ensured. When the annular plate 204 moves in a circle, the circular tubes 205 and the blocking plates 206 are driven to move in a circle. The circular holes 208 are blocked by the blocking plates 206, so that the space of the inner cavity of the outer shell 103 and the inner liner 106 is separately isolated.

[0046] like Fig. 9As shown, the pressure regulating assembly includes a moving rod 303, the rear side of which is connected to the cylindrical rod 301, and the movement of the cylindrical rod 301 can drive the connected moving rod 303 to move. A rectangular rod 302 is provided on the outer side of the moving rod 303, and a plurality of transverse grooves 209 are arranged on the inner circumference of the detection ring 203. The rectangular rod 302 is connected to the transverse groove 209, and the transverse groove 209 constrains the moving rod 303 to move horizontally forward and backward. A sealing plate 304 is provided on the front side of the cylindrical rod 301, and a rectangular tube 305 is provided on the outer side of the sealing plate 304. The sealing plate 304 is tightly connected to the rectangular tube 305 to ensure the airtightness therebetween. With the movement of the sealing plate 304, the gas inside the rectangular tube 305 can be squeezed into the outer air bag 306 and the inner air bag 307, and the rectangular tube 305 is connected to the inside of the detection ring 203.

[0047] like Figure 6 , Figure 7 , Fig. 9 As shown, the top of the rectangular tube 305 is interconnected with the outer airbag 306, the bottom of the rectangular tube 305 is interconnected with the inner airbag 307, the outer airbag 306 is connected to the outer side of the detection ring 203, and the inner airbag 307 is connected to the inner side of the detection ring 203. The gas inside the rectangular tube 305 is squeezed into the outer airbag 306 and the inner airbag 307, which can make the outer airbag 306 and the inner airbag 307 expand, and resist the outer wall of the inner liner 106 and the inner wall of the outer shell 103. A first air pressure sensor is provided inside the outer airbag 306. If cracks or small holes appear in the outer shell 103, at this time, since the outer shell 103 and the inner liner 106 are in a vacuum state during use, the external air pressure is greater than that, and the external gas will move to the inside of the vacuum cavity. , impacting the outer wall of the outer airbag 306, causing the air pressure in the outer airbag 306 to fluctuate. The first air pressure sensor will recognize that the air pressure in the outer airbag 306 increases instantly, indicating that the outer shell 103 is broken at this time. A second air pressure sensor is provided inside the inner airbag 307. If cracks or small holes appear in the inner liner 106, since the outer shell 103 and the inner liner 106 are in a vacuum state during use, the air pressure in the inner liner 106 is greater than that point, and the gas in the inner liner 106 moves toward the inside of the vacuum cavity, impacting the outer wall of the inner airbag 307, causing the air pressure in the inner airbag 307 to fluctuate. The second air pressure sensor will recognize that the air pressure in the outer airbag 306 increases instantly, indicating that cracks or small holes appear in the inner liner 106 at this time.

[0048] When the device is in use and does not store liquefied gas, since the cavity between the outer shell 103 and the inner liner 106 is not vacuumed, there is air inside the cavity. Then, the use status of the outer shell 103 and the inner liner 106 is detected. Figure 3In the initial state shown, firstly, the two electric multi-stage telescopic rods 502 are controlled to extend synchronously, driving the connected square plate 501 to move toward the detection ring 203 on the opposite side. When the two square plates 501 simultaneously contact the inner wall of the detection ring 203 on the opposite side, the electric multi-stage telescopic rod 502 continues to extend. At this time, since the positions of the detection rings 203 on both sides are fixed, the reaction force of the electric multi-stage telescopic rod 502 will push the second piston plate 503 to move inside the second cylinder 504. At this time, the solenoid valve 506 is in a closed state, and the gas inside the second cylinder 504 enters the first cylinder 402 through the connecting pipe 401, pushing the spur rack 404 to move, thereby driving the annular plate 204 to rotate inside the detection ring 203, and driving the resistance The baffle 206 blocks the circular hole 208, and the sealing plate 304 moves inside the rectangular tube 305, and discharges the gas inside the rectangular tube 305 into the outer airbag 306 and the inner airbag 307, so that the outer airbag 306 is close to the inner wall of the outer shell 103, and the inner airbag 307 is close to the outer wall of the inner liner 106, so that a closed space is formed between the two detection rings 203, and then the hydraulic multi-stage telescopic rods 201 on both sides are controlled to extend synchronously, driving the two detection rings 203 to move inward synchronously, and squeezing the gas between the two detection rings 203. During the squeezing process, the air pressure between the two detection rings 203 will increase, and the detection rings 203 only need to move inward synchronously a short distance to prevent excessive pressure caused by the moving distance process. , causing the shell 103 to rupture, controlling the two detection rings 203 to move a short distance and then stop moving, the air pressure probes inside the two detection rings 203 will recognize that the air pressure in the enclosed space will increase, and then remain constant. If it remains constant within a unit of time, it indicates that both the shell 103 and the liner 106 are ruptured and leaking. If it is recognized that the air pressure gradually decreases at this time, it indicates that the shell 103 or the liner 106 is ruptured in this area, and then the right electric multi-stage telescopic rod 502 is controlled to contract. Under the action of the right spring 505, the outer airbag 306 and the inner airbag 307 are reset, and the blockage of the right circular hole 208 is released at the same time, and the right hydraulic multi-stage telescopic rod 201 is controlled to Stretch, first move the detection ring 203 to the middle of the inner liner 106, and then continue to seal the circular hole 208, inflate the outer air bag 306 and the inner air bag 307, and move the detection rings 203 on both sides inward to detect the distance of this half section. If there is no change in air pressure, it indicates that the left half is not damaged, and then release the sealing of the circular holes 208 on both sides and deflate and reset the outer air bag 306 and the inner air bag 307, and detect the interval on the right half. First detect the half of the right half, which effectively speeds up the detection speed. By dividing it in half, the rupture position can be quickly located, thereby reminding the workers to inspect the part to ensure the integrity of the outer shell 103 and the middle section of the inner liner 106 before use.

[0049] Then, in the initial state ( Figure 3 As shown), the two detection rings 203 are controlled to move synchronously inward for a distance, the circular holes 208 on both sides are controlled to be blocked, and the outer airbag 306 and the inner airbag 307 are inflated. The detection rings 203 on both sides are pulled synchronously outward by the hydraulic multi-stage telescopic rod 201 to compress the enclosed space formed on both sides, increase the air pressure on both sides of the outer shell 103 and the inner liner 106, and detect the air pressure on both sides through the air pressure probe, so as to identify the damage of the outer shell 103 and the inner liner 106 at both ends. If it is identified that the air pressure on one side is reduced, it indicates that there is damage and leakage on that side.

[0050] When the device is in normal use, the cavity between the outer shell 103 and the inner liner 106 is first evacuated by a vacuum pump, so that a certain negative pressure is generated in the cavity between the outer shell 103 and the inner liner 106. The pressure changes in the cavity can be monitored by multiple air pressure probes arranged on the detection ring 203. If multiple air pressure probes identify that the pressure inside the cavity is gradually increasing, it indicates that the inner liner 106 may be damaged, and the gas in the inner liner 106 is discharged, causing the cavity pressure to increase. It may also be that the outer shell 103 is damaged and external gas enters the cavity. At this time, it is necessary to quickly locate the damaged position. Figure 3 In the initial state shown, firstly, the two electric multi-stage telescopic rods 502 are controlled to extend synchronously, driving the connected square plate 501 to move toward the detection ring 203 on the opposite side. When the two square plates 501 simultaneously contact the inner wall of the detection ring 203 on the opposite side, the electric multi-stage telescopic rod 502 continues to extend. At this time, since the positions of the detection rings 203 on both sides are fixed, the reaction force of the electric multi-stage telescopic rod 502 will push the second piston plate 503 to move inside the second cylinder 504. At this time, the solenoid valve 506 is in a closed state, and the gas inside the second cylinder 504 enters the first cylinder 402 through the connecting pipe 401, pushing the spur rack 404 to move, thereby driving the annular plate 204 to rotate inside the detection ring 203, and driving the blocking plate 2 06 to seal the circular hole 208, and at the same time, the sealing plate 304 moves inside the rectangular tube 305 to discharge the gas inside the rectangular tube 305 into the outer air bag 306 and the inner air bag 307, so that the outer air bag 306 is close to the inner wall of the outer shell 103, and the inner air bag 307 is close to the outer wall of the inner liner 106, so that a closed space is formed between the two detection rings 203, and the air pressure of the closed space is monitored by the air pressure probe. If it is identified that there is no increase in air pressure in this section, but the air pressure increases at both ends of the outer shell 103 and the inner liner 106, it indicates that the location of the leakage source at this time is the two ends of the outer shell 103 and the inner liner 106. The air pressure probe set on the outside of the detection ring 203 can allow the staff to focus on repairing and sealing the two ends.

[0051] When the air pressure probe detects that the air pressure in this enclosed space increases, it indicates that a leak has occurred in this section, which may be due to the rupture of the inner liner 106 or the outer shell 103. Then, the electric multi-stage telescopic rod 502 on the right side is controlled to contract. Under the action of the right spring 505, the outer airbag 306 and the inner airbag 307 are reset, and the blockage of the circular hole 208 on the right side is released. The hydraulic multi-stage telescopic rod 201 on the right side is controlled to extend, and the detection ring 203 is first moved to the middle of the inner liner 106, and then the circular hole 208 is continued to be blocked. The outer airbag 306 and the inner airbag 307 are inflated, and the detection rings 203 on both sides are moved inward to detect the distance of the half section. If there is no change in air pressure, it indicates that the left half section is not damaged. Then the blockage of the round holes 208 on both sides is released, and the outer airbag 306 and the inner airbag 307 are deflated and reset, and the right half section is detected. First, the right half is detected, which can effectively speed up the detection speed. By dividing by half, the rupture position can be quickly located. The final detection distance is as follows Fig.12 As shown, the distance is the same as the width of the detection ring 203, and when it is at the shortest detection distance, the air pressure in this section will rise rapidly due to the small space. When it is recognized that the air pressure in this section is too high, the solenoid valve 506 is controlled to open, and the gas in the outer air bag 306 and the inner air bag 307 is quickly discharged. At the same time, the blockage of the circular hole 208 is released, so that the cavity between the outer shell 103 and the inner liner 106 begins to accommodate the high-pressure gas, thereby reducing the local pressure on the shell.

[0052] When the leakage position is identified, the detection ring 203 on the left is controlled to move to the area, and the detection ring 203 on the right is moved to the left at the same time, so as to resist the square plate 501 on the left, and push the electric push rod on the left to move, so that the outer airbag 306 and the inner airbag 307 are expanded synchronously, and the ruptured area is first blocked to reduce the continued discharge of gas and reduce the loss of vacuum between the outer shell 103 and the inner liner 106. If cracks or small holes appear in the outer shell 103, at this time, since the outer shell 103 and the inner liner 106 are in a vacuum state during use, the external air pressure is greater than that at this time, and the external gas will move to the inside of the vacuum cavity, impact the outer wall of the outer airbag 306, causing the air pressure in the outer airbag 306 to fluctuate. The first air pressure sensor will recognize that the air pressure of the outer air bag 306 increases instantly, indicating that the outer shell 103 is broken at this time, reminding the workers to quickly inspect and seal the outer shell 103. If cracks or small holes appear in the inner liner 106, the gas in the inner liner 106 will move to the inside of the vacuum chamber and impact the outer wall of the inner air bag 307, causing the air pressure in the inner air bag 307 to fluctuate. The second air pressure sensor will recognize that the air pressure of the inner air bag 307 increases instantly, indicating that the inner liner 106 is broken at this time. It is necessary to speed up the discharge of the liquefied gas in the inner liner 106 to prevent the continued leakage of gas, which will increase the air pressure between the outer shell 103 and the inner liner 106 and cause the outer shell 103 to rupture and explode.

[0053] It should be noted that: through the cooperation of the control component and the pressure regulating component, the expansion state of the outer air bag 306 and the inner air bag 307 is controlled, and the closing state of the circular hole 208 is controlled in cooperation with the connecting component. By separately controlling the movement of the two detection rings 203, before use, through the expansion of the inner air bag 307 and the outer air bag 306 and the closing of the circular hole 208, the air pressure between the shell and the inner liner 106 is monitored by the movement of the two detection rings 203, so as to infer whether there is a rupture and leakage of the shell or the inner liner 106, and quickly identify the location of the leakage point, which is convenient for workers to inspect and repair local areas. During use, the pressure change of the cavity between the shell and the inner liner 106 is monitored by the air pressure probe. During the monitoring, if the air pressure increases, it indicates that the shell or the inner liner 106 is damaged. Through the expansion of the inner airbag 307 and the outer airbag 306 and the closing of the circular hole 208, the two detection rings 203 are moved, and the detection speed is accelerated by the method of dividing the detection interval into two halves, and the rupture position of the shell or the inner liner 106 is quickly located. Then, the damaged position is quickly blocked by the outer airbag 306 and the inner airbag 307 on one side, so as to reduce the rupture of the outer shell 103 caused by the leakage of liquefied gas. At the same time, the first air pressure sensor and the second air pressure sensor are used to identify the damage of the outer shell 103 or the damage of the inner liner 106, and targeted treatment is carried out later to ensure the airtightness of the device before use and the safety during use.

[0054] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0055] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0057] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A cryogenic liquid storage tank with explosion-proof function, characterized in that: The invention comprises a shell (103), wherein an inner liner (106) is arranged inside the shell (103), support rods (108) are arranged on both left and right sides of the inner liner (106), the support rods (108) on both sides are arranged symmetrically, the outer sides of the support rods (108) are connected to the inner side of the shell (103), an interlayer (107) is arranged inside the shell (103), explosion-proof material is arranged inside the interlayer (107), a control box (109) is arranged on the right side of the shell (103), a plurality of conveying pipes are arranged on the left side of the control box (109), and the conveying pipes pass through one side of the inner liner (106), a support plate (101) is arranged on the top of the shell (103), and a fence (102) is arranged on the top of the support plate (101); Two detection rings (203) are sleeved on the outer side of the inner liner (106), the two detection rings (203) are arranged symmetrically on the left and right, two connecting plates (202) are arranged symmetrically up and down on the outer side of each detection ring (203), a hydraulic multi-stage telescopic rod (201) is arranged on the outer side of each connecting plate (202), the outer side of the hydraulic multi-stage telescopic rod (201) is connected to the inside of the outer shell (103), and air pressure probes are arranged on the left and right sides of the middle of the detection ring (203); The inner side of the detection ring (203) is provided with a control component, the inner side of the control component is provided with an electric multi-stage telescopic rod (502), the inner side of the electric multi-stage telescopic rod (502) is provided with a square plate (501), the outer side of the control component is provided with a cylindrical rod (301), one side of the cylindrical rod (301) is provided with a pressure regulating component, the top of the pressure regulating component is connected to an outer air bag (306), and the bottom of the pressure regulating component is connected to an inner air bag (307), a plurality of circular holes (208) are arranged on the inner circumference of the detection ring (203), and the outer side of the cylindrical rod (301) is provided with a connecting component, and the connecting component and the circular hole (208) cooperate with each other.

2. The low-temperature liquid storage tank with explosion-proof function according to claim 1, characterized in that: The control component comprises a second piston plate (503), the outer side of the second piston plate (503) is interconnected with the inner side of the electric multi-stage telescopic rod (502), a second cylinder (504) is provided on the outer side of the second piston plate (503), the inner side of the second cylinder (504) is interconnected with the detection ring (203), a spring (505) is provided inside the second cylinder (504), the outer side of the spring (505) is interconnected with the inner side of the second piston plate (503), and an electromagnetic valve (506) is provided at the inner bottom of the second cylinder (504).

3. The low-temperature liquid storage tank with explosion-proof function according to claim 2 is characterized in that: A connecting pipe (401) is provided on the inner side of the second cylinder (504), and the connecting pipe (401) passes through one side of the detection ring (203). A first cylinder (402) is provided on the other side of the connecting pipe (401). The bottom of the first cylinder (402) is connected to the inside of the detection ring (203), and a first piston plate (403) is provided inside the first cylinder (402).

4. The low-temperature liquid storage tank with explosion-proof function according to claim 3 is characterized in that: A spur rack (404) is provided on the top of the first piston plate (403), and a first gear (405) is meshed with the top of the spur rack (404), a pin is provided inside the first gear (405), a support block (406) is connected to the middle of the pin, and the support block (406) is interconnected with the inside of the detection ring (203), and a second gear (407) is connected to the other side of the pin, and an arc-shaped rack (408) is meshed with the bottom of the second gear (407), and the inner side of the arc-shaped rack (408) is interconnected with the connecting component.

5. The low-temperature liquid storage tank with explosion-proof function according to claim 4, characterized in that: The connecting component comprises an annular plate (204), the annular plate (204) is rotatably connected to the detection ring (203), the outer side of the annular plate (204) is connected to the arc-shaped rack (408), a plurality of vertical slide grooves (207) are arranged on the inner circumference of the annular plate (204), the vertical slide grooves (207) are connected to the cylindrical rod (301), a plurality of circular tubes (205) are arranged on the outer circumference of the annular plate (204), and a blocking plate (206) is provided on the outer side of each circular tube (205).

6. The low-temperature liquid storage tank with explosion-proof function according to claim 1, characterized in that: The pressure regulating assembly comprises a moving rod (303), the rear side of the moving rod (303) is connected to the cylindrical rod (301), the outer side of the moving rod (303) is provided with a rectangular rod (302), the inner circumference of the detection ring (203) is arranged with a plurality of transverse sliding grooves (209), and the rectangular rod (302) and the transverse sliding grooves (209) are connected to each other.

7. The low-temperature liquid storage tank with explosion-proof function according to claim 6, characterized in that: A sealing plate (304) is provided on the front side of the cylindrical rod (301), a rectangular tube (305) is provided on the outer side of the sealing plate (304), and the rectangular tube (305) is connected to the inside of the detection ring (203).

8. The low-temperature liquid storage tank with explosion-proof function according to claim 7, characterized in that: The top of the rectangular tube (305) is interconnected with the outer airbag (306), the bottom of the rectangular tube (305) is interconnected with the inner airbag (307), the outer airbag (306) is connected to the outer side of the detection ring (203), the inner airbag (307) is connected to the inner side of the detection ring (203), a first air pressure sensor is provided inside the outer airbag (306), and a second air pressure sensor is provided inside the inner airbag (307).

9. The low-temperature liquid storage tank with explosion-proof function according to claim 1, characterized in that: Two fixing rings (104) are arranged on the outer side of the housing (103), the two fixing rings (104) are arranged symmetrically on the left and right, and a bottom plate (105) is provided at the bottom of the fixing ring (104).

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