A spray pressure reduction device for low temperature liquid storage tank

Abstract

The present invention relates to the technical field of cryogenic liquid storage, and specifically to a cryogenic liquid storage tank spray pressure reduction device, wherein the upper end surface of the fixed base is fixedly connected with a support vertical rod, the top end of the support vertical rod is fixedly connected with a fixed ring, the interior of the fixed ring is fixedly connected with a protective tank, the interior of the protective tank is provided with a storage tank, the top end of the storage tank is provided with a vortex spray pipe located inside the protective tank, the upper end surface of the fixed base is fixedly connected with a water storage tank, the top end of the water storage tank is provided with a refrigeration tank, the interior of the refrigeration tank is provided with a spiral pipe, a liquid outlet pipe is connected between the top end of the refrigeration tank and the vortex spray pipe, the bottom of the spiral pipe is fixedly connected with a liquid extraction pipe located in the water storage tank, and a filling cavity is provided between the outer wall of the storage tank and the inner wall of the protective tank. The present invention can achieve the cooling and pressure reduction effect of the storage tank and prevent the occurrence of safety accidents. Since refrigeration equipment is used to cool the spiral pipe, the cooling effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of cryogenic liquid storage, and in particular to a spraying and depressurizing device for a cryogenic liquid storage tank. Background Art

[0002] Cryogenic liquids, such as liquefied natural gas, ethylene, ethane, propylene, etc., have liquefaction temperatures far below ambient temperature at normal pressure and are generally stored in cryogenic tanks. Although storage and transportation equipment or pipelines have adopted good cold preservation protection measures, due to the large temperature difference between the cryogenic liquid and the environment, endothermic evaporation occurs during storage and transportation, and as the amount of heat absorbed continues to increase, the storage and transportation pressure will continue to rise. If effective pressure reduction measures are not taken in time, overpressure accidents may easily occur.

[0003] When cooling and reducing the pressure of existing cryogenic liquid storage tanks, water is generally used to spray the storage tanks, but the cooling effect is not good, and multi-stage cooling cannot be automatically achieved according to temperature changes. The accumulated water after spraying is directly discharged, and water resources are not recycled, resulting in a waste of water resources; at the same time, the existing storage tanks have a simple structure, and when the existing equipment directly inputs cryogenic liquid into the storage tank, the impurities contained in the cryogenic liquid cannot be cleaned in time, resulting in low purity of the cryogenic liquid in the storage tank, affecting subsequent use.

[0004] Therefore, the present invention provides a low-temperature liquid storage tank spray pressure reduction device to solve the above-mentioned problems. Summary of the invention

[0005] 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 spray pressure reduction device, which effectively solves the problems that the existing spray device has poor cooling effect when cooling the storage tank, cannot automatically achieve multi-stage cooling according to temperature changes, and does not recycle water resources, resulting in waste of water resources.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A low-temperature liquid storage tank spray pressure reduction device comprises a fixed base, the upper end face of the fixed base is fixedly connected with a supporting vertical rod, the top end of the supporting vertical rod is fixedly connected with a fixing ring, the interior of the fixing ring is fixedly connected with a protective tank, the interior of the protective tank is provided with a storage tank, the top of the storage tank is provided with a vortex spray pipe located inside the protective tank, the upper end face of the fixed base is fixedly connected with a water storage tank, the top of the water storage tank is provided with a refrigerating tank, the interior of the refrigerating tank is provided with a spiral tube, a liquid outlet pipe is connected between the top of the refrigerating tank and the vortex spray pipe, the bottom of the spiral tube is fixedly connected with a liquid extraction pipe located in the water storage tank, a filling cavity is provided between the outer wall of the storage tank and the inner wall of the protective tank, and an exhaust pipe is provided on the storage tank.

[0008] Preferably, a wavy cooling pipe is provided at the upper and lower ends of the outer wall of the storage tank respectively, an inlet pipe is connected between the upper end of the wavy cooling pipe and the liquid outlet pipe, a reflux valve is fixedly connected to the front lower end surface of the water storage tank, and a reflux pipe is connected between the reflux valve and the lower end of the wavy cooling pipe.

[0009] Preferably, a positioning tube is fixedly connected to the top of the protective tank, an extension tube that passes through the storage tank is fixedly connected to the positioning tube, a nozzle is fixedly connected to the bottom end of the extension tube, a retaining ring is fixedly connected to the middle part of the inner side of the storage tank, a first push plate and a second push plate are provided inside the storage tank, and a return spring is respectively provided on the first push plate and the second push plate.

[0010] Preferably, an annular groove is provided in the middle of the outer side of the protective tank, a plurality of support rods are fixedly connected to the inner wall of the annular groove, and a ring sleeved on the outer side of the storage tank is fixedly connected between the plurality of support rods.

[0011] Preferably, a protection box is fixedly connected to the bottom of the storage tank, and a cooling fan is fixedly connected inside the protection box.

[0012] Preferably, a circulation valve located below the reflux valve is fixedly connected to the front side of the water storage tank, a circulation pipe is connected between the circulation valve and the bottom of the protection tank, and a stabilizing frame is fixedly connected to the bottom of the protection tank.

[0013] Preferably, a filter box is fixedly connected to the top of the positioning tube, a filter plate is rotatably connected to the inside of the filter box, a closing cover is provided at the top of the filter box, and a gas tube is provided on the top of the closing cover.

[0014] Preferably, the retaining ring is rotatably connected with a rotation shaft that passes through the first push plate, the surface of the rotation shaft is provided with a spiral groove, the first push plate is rotatably connected with a ball, the top end of the rotation shaft is coaxially fixedly connected with a driving gear located in the filter box, the bottom of the filter plate is fixedly connected with a driving gear ring that meshes with the driving gear, an impurity box is provided between the filter box and the filter plate, the top end of the impurity box is fixedly connected with a cross bar, and the cross bar is provided with a first cleaning plate.

[0015] Preferably, a first solenoid valve is provided on the liquid outlet pipe, and a second cleaning plate is fixedly connected to the water storage tank.

[0016] Preferably, a compression cylinder is sleeved on the rotating shaft and is located between the first push plate and the retaining ring, and a trigger switch is fixedly connected to the top end of the first push plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the coordinated use of the temperature sensor, the water pump, the refrigeration equipment and the first solenoid valve, the water in the water storage tank is added to the spiral tube and the vortex spray pipe through the liquid extraction pipe. The sprayed low-temperature water can quickly cool the storage tank and reduce the pressure of the storage tank to prevent the occurrence of safety accidents. Since the refrigeration equipment is used to cool the spiral tube, the cooling effect is better, and the temperature value detected by the temperature sensor has the advantages of high accuracy, fast response speed and convenience.

[0019] 2. The low-temperature water in the wavy cooling pipe can take away the high temperature during the flow process, so as to achieve the purpose of rapid cooling of the storage tank. Due to the wavy design, the heat absorption speed is fast, thus achieving rapid cooling and pressure reduction.

[0020] 3. Through the coordinated use of wavy cooling pipes and cooling fans, multi-stage cooling and pressure reduction effects are achieved, improving cooling effects and safety.

[0021] 4. Through the coordinated use of the filter plate, the first push plate, the second push plate, the ball, the spiral groove, the rotating shaft, etc., the driving gear engages with the driving gear ring to rotate, and the bristles on the first cleaning plate will clean the impurities on the filter plate, and the impurities will enter the impurity box to improve the purity of the cryogenic liquid. In the cleaning process, the bristles will clean the holes on the filter plate to prevent blockage.

[0022] 5. The device realizes the recycling of water resources and saves water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0024] Figure 2 For the present invention Figure 1 A cross-sectional perspective schematic diagram of

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the storage tank of the present invention;

[0026] Figure 4 For the present invention Figure 2 A is an enlarged schematic diagram;

[0027] Figure 5 For the present invention Figure 2 The enlarged schematic diagram of point B in FIG.

[0028] Figure 6 It is a cross-sectional perspective schematic diagram of a storage tank of the present invention;

[0029] Figure 7 For the present invention Figure 6 The enlarged schematic diagram of point C in FIG.

[0030] Figure 8is a three-dimensional cross-sectional schematic diagram of the filter box of the present invention;

[0031] Fig. 9 It is a schematic diagram of the structure of the driving gear and the driving gear ring of the present invention;

[0032] Fig.10 It is a schematic diagram of the structure of the cross bar and the first cleaning plate of the present invention.

[0033] Markings in the figure: 1. Fixed base; 2. Support vertical rod; 3. Fixed ring; 4. Protective tank; 5. Storage tank; 6. Vortex spray pipe; 7. Water storage tank; 8. Refrigeration tank; 9. Spiral pipe; 10. Liquid outlet pipe; 11. Liquid extraction pipe; 12. Filling chamber; 13. Exhaust pipe; 14. Wave cooling pipe; 15. Water inlet pipe; 16. Return valve; 17. Return pipe; 18. Positioning pipe; 19. Extension pipe; 20. Spray head; 21. Retaining ring; 22. First push plate; 23. Second push plate; 24. Return spring; 25. Annular groove; 26. Support rod; 27. Ring; 28. Protective box; 29. ​​Cooling fan; 30. Circulation valve; 31. Circulation pipe; 32. Stabilizing frame; 33. Filter box; 34. Filter plate; 35. Closing cover; 36. Gas pipe; 37. Rotation shaft; 38. Spiral groove; 39. Ball; 40. Drive gear; 41. Drive gear ring; 42. Impurity box; 43. Cross bar; 44. First cleaning plate; 45. First solenoid valve; 46. Compression cylinder; 47. Trigger switch; 48. Second cleaning plate. DETAILED DESCRIPTION

[0034] The following will refer to Figures 1 to 10 Various embodiments of the present invention are described in detail.

[0035] A low temperature liquid storage tank spray pressure reduction device, such as Figure 1 , Figure 2 , Figure 3As shown, it includes a fixed base 1, which is fixed on a corresponding device to improve the stability of the entire device. A vertical support vertical rod 2 is fixedly connected to the upper end face of the left side of the fixed base 1, and a fixing ring 3 is fixedly connected to the top of the support vertical rod 2. The fixing ring 3 is located directly above the fixed base 1. A protective tank 4 is fixedly connected to the inside of the fixing ring 3. A storage tank 5 is provided inside the protective tank 4. A vortex spray pipe 6 is provided on the top of the storage tank 5. The vortex spray pipe 6 is located inside the upper end of the protective tank 4 and is fixedly connected to the inner wall of the protective tank 4. A plurality of water spraying holes are evenly arranged on the lower end face of the vortex spray pipe 6. The upper end surface of the fixed base 1 is fixedly connected with a water storage tank 7, which is located on the left side of the protective tank 4. A water source is arranged inside the water storage tank 7. The fixed base 1 is fixedly connected with an auxiliary rod located on the right side of the supporting vertical rod 2, which is located on the left side of the water storage tank 7. A pad is fixedly connected with the auxiliary rod, which is located above the water storage tank 7. A refrigeration tank 8 is fixedly connected with the top surface of the pad. A refrigeration device is installed in the refrigeration tank 8. The refrigeration device is a prior art and will not be described in detail here. The refrigeration device is connected to the controller via a wire.

[0036] The interior of the refrigerated tank 8 is fixedly connected with a spiral tube 9, which is made of existing low-temperature resistant materials and is in a spiral shape. This can increase the contact area between the spiral tube 9 and the cold air, so that the temperature of the water source passing through the spiral tube 9 can be quickly reduced. A filling cavity 12 is provided between the outer wall of the storage tank 5 and the inner wall of the protective tank 4. The top of the refrigerated tank 8 is fixedly connected with a liquid outlet pipe 10, and the other end of the liquid outlet pipe 10 is fixedly connected to the water inlet end of the vortex spray pipe 6. A first electromagnetic valve 45 is provided on the liquid outlet pipe 10, and an existing suitable waterproof sleeve is provided on the first electromagnetic valve 45. A water pump is provided inside the water storage tank 7, and the inner wall of the protective tank 4 is provided with a water pump. A temperature sensor is provided, and a water pump, a first solenoid valve 45, and a temperature sensor are connected to a controller through a wire. The controller is provided on the outer end of the water storage tank 7, and the controller is connected to an external power supply through a wire. The bottom of the spiral tube 9 is fixedly connected with a liquid extraction pipe 11, which runs through the water storage tank 7, and the bottom end of the liquid extraction pipe 11 is fixedly connected to the water outlet end of the water pump. The water inlet end of the water pump is located in the water. The storage tank 5 is fixedly connected with an exhaust pipe 13, which runs through the protective tank 4. An opening valve is provided on the exhaust pipe 13, and the low-temperature liquid in the storage tank 5 can be discharged into a suitable container through the exhaust pipe 13;

[0037] During transportation or delivery, if the temperature on the surface of the storage tank 5 continues to rise, the high temperature will be emitted into the filling chamber 12. When the temperature sensor detects the set temperature value at this time, the signal is transmitted to the controller. The controller starts the water pump and the refrigeration equipment, and opens the first solenoid valve 45. The refrigeration equipment cools down the cold storage tank 8. The water pump adds the water in the water storage tank 7 to the spiral tube 9 through the liquid extraction pipe 11. The temperature of the water in the spiral tube 9 will drop rapidly. Then the low-temperature water will flow into the vortex spray pipe 6 through the liquid outlet pipe 10. The low-temperature water is quickly sprayed onto the upper end surface of the storage tank 5 through each water spray port for cooling. Then the water flow will flow along the outer surface of the storage tank 5 to the inner bottom of the protective tank 4. The sprayed low-temperature water can quickly realize the cooling effect of the storage tank 5, so that the temperature in the filling chamber 12 drops rapidly, which plays a role in reducing the pressure of the storage tank 5 and prevents the occurrence of safety accidents. Since the refrigeration equipment is used to cool the spiral tube 9, the cooling effect is better, and the water flow can contact the surface of the storage tank 5 to achieve the purpose of rapid cooling.

[0038] When the temperature value detected by the temperature sensor is lower than the set value, the signal is transmitted to the controller, and the controller turns off the water pump, the refrigeration equipment, and the first solenoid valve 45. At this time, the water flow no longer cools the storage tank 5. Since the temperature sensor is used to detect the storage tank 5, the detected temperature value has the advantages of high accuracy, fast response speed and convenience, and later maintenance is more convenient.

[0039] like Figure 3 As shown, the upper and lower ends of the outer wall of the storage tank 5 are respectively fixedly connected with a corrugated cooling pipe 14, and the two corrugated cooling pipes 14 are connected by a connecting pipe. The two corrugated cooling pipes 14 are respectively arranged around the outer surface of the storage tank 5, so that the storage tank 5 can be quickly cooled down. A water inlet pipe 15 is connected between the water inlet end of the upper corrugated cooling pipe 14 and the liquid outlet pipe 10, and a second solenoid valve is arranged on the water inlet pipe 15. The second solenoid valve is provided with a suitable waterproof sleeve, and the second solenoid valve is connected to the controller through a wire. A reflux valve 16 is fixedly connected to the lower end surface of the front side of the water storage tank 7, and a reflux pipe 17 is connected between the drainage end of the lower corrugated cooling pipe 14 and the reflux valve 16;

[0040] When the vortex spray pipe 6 is not enough to cool the storage tank 5, the temperature in the filling chamber 12 continues to rise, the temperature sensor detects a higher temperature, and transmits a signal to the controller. The controller opens the second solenoid valve, and then the low-temperature water in the liquid outlet pipe 10 enters the upper wavy cooling pipe 14, enters the lower wavy cooling pipe 14 through the connecting pipe, and finally enters the water storage tank 7 through the return pipe 17 and the return valve 16 for circulation; the low-temperature water in the wavy cooling pipe 14 can take away the high temperature during the flow process, so as to achieve the purpose of rapid cooling of the storage tank 5. Due to the wave-shaped design, the heat absorption speed is fast, thereby achieving rapid cooling and pressure reduction.

[0041] like Figure 2 , Figure 7 As shown, a positioning tube 18 is fixedly connected to the top of the protective tank 4, and the positioning tube 18 is set up to pass through, and an extension tube 19 is fixedly connected to the inner wall of the positioning tube 18, and the middle part of the vortex spray pipe 6 is fixedly connected to the extension tube 19, and the extension tube 19 passes through the storage tank 5. The bottom end of the extension tube 19 is fixedly connected with a nozzle 20, and the nozzle 20 is provided with a nozzle hole, and a retaining ring 21 is fixedly connected to the middle part of the inner side of the storage tank 5, and the nozzle 20 and the retaining ring 21 are located on the same plane, and guide rods are fixedly connected to the inner walls of the upper and lower ends of the storage tank 5, respectively, and guide grooves are respectively provided on the edge ends of the first push plate 22 and the second push plate 23, and the first push plate 22 and the second push plate 23 are respectively located at the upper and lower ends of the storage tank 5 On the inside of the end, each guide rod is respectively located in the guide groove, and the first push plate 22 and the second push plate 23 are respectively fixedly connected with a return spring 24, and the specifications of the two return springs 24 are the same. The other end of the return spring 24 located at the top is fixedly connected to the top of the storage tank 5, and the other end of the return spring 24 located at the bottom is fixedly connected to the bottom of the storage tank 5. The edge ends of the first push plate 22 and the second push plate 23 are fixedly connected with a sealing gasket, which can prevent air leakage when the first push plate 22 and the second push plate 23 move. The top surface of the first push plate 22 is fixedly connected with an existing suitable trigger switch 47, and the trigger switch 47 is connected to the controller through a wire. The top end of the extension tube 19 is fixedly connected with an intake check valve;

[0042] During specific use, the external gas transmission equipment is connected to the extension tube 19 through a pipeline, and then cryogenic liquid is added to the extension tube 19. The air inlet one-way valve is opened, and the cryogenic liquid is ejected from the jet hole. With the continuous input of the cryogenic liquid, the cryogenic liquid at this time pushes the first push plate 22 and the second push plate 23 away from each other, and the two return springs 24 are compressed synchronously. The distance between the first push plate 22 and the second push plate 23 will gradually increase, and then the cryogenic liquid is stored. When the trigger switch 47 touches the top wall of the storage tank 5, the trigger switch 47 transmits a signal to the controller, prompting that the low-temperature gas in the storage tank 5 has reached an appropriate level, and personnel no longer transport cryogenic liquid into the extension tube 19. The one-way valve is closed, and the gas in the storage tank 5 will not be output in reverse through the one-way valve. By moving between the first push plate 22 and the second push plate 23, an appropriate amount of cryogenic liquid can be added. The setting of the trigger switch 47 can achieve a good prompting effect.

[0043] like Figure 2 , Figure 4 As shown, the middle part of the outer side of the protective tank 4 is set as an annular groove 25. Due to the setting of the annular groove 25, the inner wall of the protective tank 4 forms a protruding end. The inner diameter of the protruding end is smaller than the inner diameter of the protective tank 4. Six support rods 26 are fixedly connected to the protruding end of the annular groove 25. Space is reserved between every two support rods 26 to facilitate the passage of water. A ring 27 is fixedly connected between the six support rods 26. The ring 27 is fixedly sleeved on the outer wall of the storage tank 5. The setting of the ring 27 can improve the stability of the storage tank 5.

[0044] like Figure 2 As shown, a protective box 28 is fixedly connected to the outer bottom of the storage tank 5, and a mounting cavity is opened in the lower end of the protective box 28. A bearing plate is fixedly connected to the inner upper end of the mounting cavity, and a cooling fan 29 is fixedly connected to the bearing plate. The cooling fan 29 is connected to the controller through a wire. A certain distance is reserved between the outer surface of the cooling fan 29 and the inner wall of the protective box 28 to facilitate the discharge of wind. The setting of the protective box 28 can prevent water from entering the cooling fan 29, and play a protective role on the cooling fan 29. An exhaust hole is provided at the top of the protective tank 4, and an air inlet hole is provided on one side of the lower end of the protective tank 4.

[0045] When the vortex spray pipe 6 is not enough to cool the storage tank 5, the temperature in the filling chamber 12 will continue to rise. The temperature sensor detects a higher temperature and transmits a signal to the controller. The controller turns on the second solenoid valve and the cooling fan 29 to rotate. Then the low-temperature water in the liquid outlet pipe 10 enters the upper wavy cooling pipe 14 to cool the storage tank 5. The low-temperature liquid enters the lower wavy cooling pipe 14 through the connecting pipe, and finally enters the water storage tank 7 through the return pipe 17 and the return valve 16 for recycling.

[0046] At the same time, the cooling fan 29 rotates rapidly, and the external wind enters into the filling chamber 12 below through the air inlet hole, and the wind enters into the filling chamber 12 along the cavity between the cooling fan 29 and the protective box 28, so as to cool down the lower half of the storage tank 5. When the wind passes through the protruding end of the protective tank 4, since the inner diameter of the protruding end is smaller than the inner diameter of the storage tank 5, the wind speed at the protruding end will increase, which can cool down the storage tank 5 and realize multi-stage cooling and pressure reduction, thereby improving the cooling effect and safety.

[0047] like Figure 1 As shown, a circulation valve 30 is fixedly connected to the front side of the water storage tank 7, and the circulation valve 30 is located below the reflux valve 16. A reflux hole is opened at the bottom of the protection tank 4, and a circulation pipe 31 is fixedly connected in the reflux hole. The circulation pipe 31 is fixedly connected to the circulation valve 30. A stabilizing frame 32 is fixedly connected to the bottom of the protection tank 4, and the stabilizing frame 32 is fixedly connected to the fixed base 1, so that the stability of the protection tank 4 can be improved. The circulation valve 30 is always located below the liquid surface in the water storage tank 7. The reflux valve 16 and the circulation valve 30 are manual valves, which are always in an open state during transportation or delivery.

[0048] The low-temperature liquid sprayed from the water outlet of the vortex spray pipe 6 finally falls into the bottom of the storage tank 5. During operation, the water pump will bring the water source in the bottom of the storage tank 5 back into the water storage tank 7 through the circulation pipe 31 and the circulation valve 30, so that the water source can be recycled and water resources can be saved.

[0049] like Figure 8 , Fig. 9 As shown, the top end of the positioning tube 18 is fixedly connected to a filter box 33, and a cavity structure is opened at the top end of the filter box 33. A filter plate 34 is rotatably connected inside the filter box 33. A positioning ring is fixedly connected to the bottom end surface of the filter plate 34, and the positioning ring is rotatably connected to the filter plate 34. The top end of the filter box 33 is connected to a closing cover 35 by bolts, and a gas pipe 36 is provided on the top end of the closing cover 35, and a threaded cap is installed on the inner thread of the gas pipe 36.

[0050] like Figure 6-Figure 10As shown, the retaining ring 21 is fixedly connected with a support rod, and the support rod is rotatably connected with a rotation shaft 37. A positioning hole is opened on the first push plate 22, and the inner diameter of the positioning hole is larger than the outer diameter of the rotation shaft 37. The rotation shaft 37 is located in the positioning hole. A spiral groove 38 is provided on the surface of the rotation shaft 37, and the spacing between the spiral grooves 38 is relatively large. A ball 39 located in the positioning hole is rotatably connected to the first push plate 22, and the ball 39 is located in the spiral groove 38 and will not form a self-locking with the spiral groove 38. The rotation shaft 37 penetrates the storage tank 5 and the filter box 33. The top end of the rotation shaft 37 is coaxially fixedly connected with a driving gear 40 located in the filter box 33. The driving gear 40 is located on the filter plate 34. Below, a concentric ring is coaxially fixedly connected to the bottom of the filter plate 34, six through holes are evenly opened on the end surface of the concentric ring, and a driving gear ring 41 meshing with the driving gear 40 is coaxially fixedly connected to the concentric ring. An annular cavity is provided between the outer diameter of the filter plate 34 and the inner diameter of the filter box 33, and an impurity box 42 is placed in the annular cavity. The inner end top surface of the impurity box 42 is flush with the top of the filter plate 34, which is conducive to the impurities entering the impurity box 42. A cross bar 43 is fixedly connected to the outer end of the impurity box 42, and a rectangular hole is opened in the cross bar 43. A first cleaning plate 44 is connected to the rectangular hole by bolts, and a plurality of bristles released from the filter plate 34 are evenly provided on the first cleaning plate 44;

[0051] When in use, the external gas transmission equipment is connected to the gas pipe 36 through a pipeline, and the cryogenic liquid enters the filter box 33 through the gas pipe 36. At this time, the filter plate 34 can filter impurities in the cryogenic liquid, and the impurities are intercepted on the top surface of the filter plate 34. Then the cryogenic liquid enters the storage tank 5 through the positioning tube 18 and the extension tube 19. With the continuous input of the cryogenic liquid, the cryogenic liquid pushes the first push plate 22 and the second push plate 23 away from each other, and the two return springs 24 are compressed synchronously. At this time, the ball 39 will drive the spiral groove 38 rotates, the spiral groove 38 rotates with the rotation shaft 37, the driving gear 40 meshes with the driving gear ring 41 to rotate, the filter plate 34 rotates, and the bristles on the first cleaning plate 44 clean the impurities on the filter plate 34. As the filter plate 34 rotates continuously, some impurities will enter the impurity box 42, so that the impurities in the cryogenic liquid can be filtered to improve the purity of the cryogenic liquid. In the cleaning process, the bristles will clean the holes on the filter plate 34 to prevent blockage, and the personnel can clean the impurity box 42 regularly;

[0052] When the cryogenic gas is transported outward, the two return springs 24 rebound and reset, and the ball 39 will drive the spiral groove 38 to rotate in the opposite direction again. The spiral groove 38 rotates with the rotation shaft 37, and the driving gear 40 engages with the driving gear ring 41 to rotate. The filter plate 34 rotates, and the bristles on the first cleaning plate 44 clean the impurities on the filter plate 34. As the filter plate 34 rotates continuously, some impurities will enter the impurity box 42, which can improve the purity of the cryogenic liquid, and the bristles will also prevent the filter plate 34 from being blocked.

[0053] like Figure 2 As shown, a second cleaning plate 48 is fixedly connected to the interior of the water storage tank 7. The second cleaning plate 48 is located above the circulation valve 30, and the water inlet end of the water pump is located on the top surface of the second cleaning plate 48. In this way, the liquid returning from the circulation valve 30 can be filtered, thereby increasing the service life of the water pump.

[0054] like Figure 7 As shown, a compression cylinder 46 is sleeved on the rotating shaft 37, the top end of the compression cylinder 46 is seamlessly fixedly connected to the bottom surface of the first push plate 22, and the bottom end of the compression cylinder 46 is seamlessly fixedly connected to the support rod. The compression cylinder 46 has the characteristics of compression and stretching. The compression cylinder 46 can automatically compress or stretch as the first push plate 22 moves, thereby preventing leakage of the cryogenic liquid.

[0055] 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.

[0056] 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.

[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 spray pressure reducing device for a cryogenic liquid storage tank, comprising a fixed base (1), characterized in that: The upper end surface of the fixed base (1) is fixedly connected to a supporting vertical rod (2), the top end of the supporting vertical rod (2) is fixedly connected to a fixing ring (3), the interior of the fixing ring (3) is fixedly connected to a protective tank (4), the interior of the protective tank (4) is provided with a storage tank (5), the top end of the storage tank (5) is provided with a vortex spray pipe (6) located inside the protective tank (4), the upper end surface of the fixed base (1) is fixedly connected to a water storage tank (7), the top end of the water storage tank (7) is provided with a refrigerating tank (8), the interior of the refrigerating tank (8) is provided with a spiral tube (9), a liquid outlet pipe (10) is connected between the top end of the refrigerating tank (8) and the vortex spray pipe (6), the bottom of the spiral tube (9) is fixedly connected to a liquid extraction pipe (11) located in the water storage tank (7), a filling cavity (12) is provided between the outer wall of the storage tank (5) and the inner wall of the protective tank (4), and an exhaust pipe (13) is provided on the storage tank (5); A positioning tube (18) is fixedly connected to the top of the protection tank (4), an extension tube (19) penetrating the storage tank (5) is fixedly connected to the positioning tube (18), a spray head (20) is fixedly connected to the bottom of the extension tube (19), a retaining ring (21) is fixedly connected to the middle of the inner side of the storage tank (5), a first push plate (22) and a second push plate (23) are provided inside the storage tank (5), and a return spring (24) is provided on the first push plate (22) and the second push plate (23) respectively; An annular groove (25) is provided in the middle of the outer side of the protection tank (4), a plurality of support rods (26) are fixedly connected to the inner wall of the annular groove (25), and a collar (27) sleeved on the outer side of the storage tank (5) is fixedly connected between the plurality of support rods (26); A protection box (28) is fixedly connected to the bottom of the storage tank (5), and a cooling fan (29) is fixedly connected inside the protection box (28); The top end of the positioning tube (18) is fixedly connected to a filter box (33), the interior of the filter box (33) is rotatably connected to a filter plate (34), the top end of the filter box (33) is provided with a closing cover (35), and the top end of the closing cover (35) is provided with a gas pipe (36); The retaining ring (21) is rotatably connected to a rotation shaft (37) penetrating the first push plate (22); a spiral groove (38) is provided on the surface of the rotation shaft (37); a ball (39) is rotatably connected to the first push plate (22); the top end of the rotation shaft (37) is coaxially fixedly connected to a driving gear (40) located in the filter box (33); the bottom of the filter plate (34) is fixedly connected to a driving gear ring (41) meshing with the driving gear (40); an impurity box (42) is provided between the filter box (33) and the filter plate (34); the top end of the impurity box (42) is fixedly connected to a cross bar (43); and a first cleaning plate (44) is provided on the cross bar (43).

2. A low-temperature liquid storage tank spray pressure reduction device according to claim 1, characterized in that: The upper and lower ends of the outer wall of the storage tank (5) are respectively provided with a corrugated cooling pipe (14); a water inlet pipe (15) is connected between the upper end of the corrugated cooling pipe (14) and the liquid outlet pipe (10); a reflux valve (16) is fixedly connected to the lower end surface of the front side of the water storage tank (7); a reflux pipe (17) is connected between the reflux valve (16) and the lower end of the corrugated cooling pipe (14).

3. A low-temperature liquid storage tank spray pressure reduction device according to claim 2, characterized in that: A circulation valve (30) located below the return valve (16) is fixedly connected to the front side of the water storage tank (7), a circulation pipe (31) is connected between the circulation valve (30) and the bottom of the protection tank (4), and a stabilizing frame (32) is fixedly connected to the bottom of the protection tank (4).

4. A low-temperature liquid storage tank spray pressure reduction device according to claim 1, characterized in that: The liquid outlet pipe (10) is provided with a first electromagnetic valve (45), and the water storage tank (7) is fixedly connected with a second cleaning plate (48).

5. The low-temperature liquid storage tank spray pressure reduction device according to claim 1, characterized in that: The rotating shaft (37) is sleeved with a compression cylinder (46) located between the first push plate (22) and the retaining ring (21), and the top end of the first push plate (22) is fixedly connected with a trigger switch (47).

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