Device for pressurizing a liquid nitrogen tank

Abstract

The utility model belongs to the field of liquid nitrogen storage tank pressure increasing, relates to a kind of liquid nitrogen storage tank pressure increasing device, including the support frame, vaporizer is fixedly connected in support frame, and pressure increasing assembly is equipped on support frame;The pressure increasing assembly includes two mobile plates of sliding connection on support frame, and connecting flange is equipped on mobile plate, the opposite side of two mobile plates is evenly provided with several spray heads connected with connecting flange, and the bottom of two mobile plates is connected with double wire screw rod by screw thread, and one end of double wire screw rod is fixedly connected with motor, and the side of support frame is fixedly connected with the connecting piece corresponding with motor, and the bottom of support frame is fixedly connected with waterlogging seat, and water outlet pipe is equipped on waterlogging seat, and the bottom of support frame is provided with slope.The utility model realizes the role of accelerating liquid nitrogen vaporization pressure increasing in vaporizer by steam to improve the ambient temperature around vaporizer, improves liquid nitrogen vaporization rate, makes the internal pressure of storage tank reach required level quickly, reduces water resource waste, and reduces operating cost.

Description

Technical Field

[0001] This utility model belongs to the field of liquid nitrogen storage tank pressurization, and relates to a device for pressurizing liquid nitrogen storage tanks. Background Technology

[0002] A liquid nitrogen storage tank is a large, cryogenic, insulated pressure vessel specifically designed for the long-term safe storage of liquid nitrogen (LN2). It is a core piece of equipment for storing and using liquid nitrogen in industrial, medical, and scientific research fields.

[0003] When storing or retrieving liquid nitrogen, the pressure of the liquid nitrogen storage tank is normally kept low to facilitate liquid nitrogen extraction. At the same time, when loading liquid nitrogen onto the truck, liquid nitrogen extraction must be stopped, the vent closed, and a booster vaporizer used to pressurize the storage tank. The booster vaporizer pressurizes the nitrogen by exchanging heat with the air to vaporize the nitrogen.

[0004] A Chinese utility model patent with publication number CN204664859U discloses a water bath vaporizer comprising a vertically arranged shell, an inlet pipe in the lower part of the shell, and an outlet pipe in the upper part of the shell, the inlet pipe and the outlet pipe being connected by a vaporization tube bundle; an external circulation pipe is also provided between the lower and upper parts of the shell, and a circulation pump is provided on the external circulation pipe; a steam inlet pipe is connected to the shell; the characteristic feature is that a steam distributor is provided at the bottom of the shell, the steam distributor comprising a conical cap, the lower side of the cap... A concentric inner tube and an outer tube are fixed at the center. The steam inlet pipe is connected from top to bottom to the center of the cone cover and is connected to the inner cavity of the inner tube. A float is installed inside the inner tube. The bottom of the inner tube is provided with a bottom cover for installing the float. The top of the inner tube is provided with a valve seat surface corresponding to the float. Several swirling flow holes are provided on the side of the inner tube. The swirling flow holes are distributed in a vortex shape on the inner tube. The bottom of the outer tube is open. A liquid outlet hole is provided on the side wall of the outer tube. Several distribution holes penetrating the cone cover are provided in the area outside the outer tube.

[0005] The existing technology has the following technical defects:

[0006] Traditional water bath heat exchange systems suffer from efficiency bottlenecks when regulating the temperature around the vaporizer. On the one hand, due to the large specific heat capacity of water, the temperature change of the entire water bath system exhibits a significant lag, making rapid temperature regulation difficult. On the other hand, increasing the heating power to accelerate the temperature rise rate would lead to an exponential increase in electricity consumption, resulting in serious energy waste. Furthermore, the large amount of water vapor generated during the heating process in existing systems is not effectively utilized and is directly released into the atmosphere, resulting in both the loss of latent heat energy and the waste of water resources. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a device for pressurizing a liquid nitrogen storage tank.

[0008] The liquid nitrogen storage tank pressurization device of this utility model includes a receiving frame, a vaporizer fixedly connected inside the receiving frame, and a pressurization component provided on the receiving frame.

[0009] The pressurization assembly includes two movable plates slidably connected to a receiving frame. Each movable plate has a connecting flange. Several nozzles connected to the connecting flanges are provided on opposite sides of the two movable plates. The bottom of the two movable plates is connected to a double-threaded screw by a thread. One end of the double-threaded screw is fixedly connected to a motor. A corresponding connector to the motor is fixedly connected to one side of the receiving frame. A water collection seat is fixedly connected to the bottom of the receiving frame. A water outlet pipe is provided on the water collection seat. Slopes are provided on both sides of the bottom of the receiving frame.

[0010] The top of the receiving frame is provided with an insertion hole, and an insertion rod is slidably connected in the insertion hole. One end of the insertion rod is fixedly connected to a cover plate.

[0011] Multiple fixed folding plates are fixedly connected to both sides of the cover plate. Grooved strips are fixedly connected to the fixed folding plates. A flexible tube is fixedly connected to the bottom of the grooved strip. A connecting block is connected to the other end of the flexible tube. The connecting block is opened on both sides of the water collection base and is connected to the water collection base.

[0012] The hose is positioned in the middle of the grooved strip, with both ends of the grooved strip higher than the middle, forming a slope.

[0013] The movable plate has a hollow structure, and the inner wall of the water-collecting base is inverted trapezoidal.

[0014] Temperature sensors are installed on the sides of the receiving frames that are close to each other.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention accelerates the vaporization and pressurization of liquid nitrogen in the vaporizer by increasing the ambient temperature around the vaporizer with steam, saving pressurization time, speeding up the loading process in subsequent steps, and shortening the liquid nitrogen downtime. By controlling the steam injection distance and temperature, the temperature of the environment around the vaporizer is changed, increasing the vaporization rate of liquid nitrogen and allowing the internal pressure of the storage tank to quickly reach the required level. The condensate recovery system formed by the cover plate and water collection seat can recycle steam condensate, reducing water waste and lowering operating costs. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present invention.

[0019] Figure 3 This is a cross-sectional view of an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the connection between the insertion rod and the insertion hole in one embodiment of this utility model.

[0021] Figure 5 This is a schematic diagram of the structure of the movable plate in one embodiment of the present invention.

[0022] Figure 6 This is an embodiment of the present utility model. Figure 1 Enlarged view of point A.

[0023] In the diagram: 1. Receiving frame; 2. Vaporizer; 3. Moving plate; 4. Connecting flange; 5. Nozzle; 6. Connector; 7. Motor; 8. Twin-threaded screw; 9. Slope; 10. Cover plate; 11. Groove strip; 12. Fixed folding plate; 13. Hose; 14. Water collection base; 15. Connecting block; 16. Water outlet pipe; 17. Temperature sensor; 18. Socket; 19. Insert rod. Detailed Implementation

[0024] Example 1

[0025] like Figures 1-6 As shown, the liquid nitrogen storage tank pressurization device of this utility model includes a receiving frame 1, a vaporizer 2 fixedly connected inside the receiving frame 1, and a pressurization component on the receiving frame 1.

[0026] The pressurization assembly includes two movable plates 3 slidably connected to a support frame 1. Each movable plate 3 has a connecting flange 4. Several nozzles 5 communicating with the connecting flange 4 are provided on opposite sides of each movable plate 3. A double-threaded screw 8 is threadedly connected to the bottom of each movable plate 3. A motor 7 is fixedly connected to one end of each double-threaded screw 8. By operating the motor 7, the double-threaded screw 8 rotates, causing the two movable plates 3 to move towards or away from each other, thereby changing the distance between the two movable plates 3 and adjusting the ambient temperature around the vaporizer 2. A connecting piece 6 corresponding to the motor 7 is fixedly connected to one side of the support frame 1. The bottom of the support frame 1... A water collection base 14 is fixedly connected, and a water outlet pipe 16 is provided on the water collection base 14. Slopes 9 are provided on both sides of the bottom of the receiving frame 1. The connecting flange 4, the moving plate 3, and the nozzle 5 are interconnected. The moving plate 3 has a hollow structure and a section of pipe is led out from the low-pressure steam network, with a valve added to control the steam consumption. The steam pipe passes through the connecting flange 4 and is sprayed through the nozzle 5 on the moving plate 3, thereby increasing the temperature of the environment around the vaporizer 2 and accelerating the conversion efficiency of the vaporizer 2. When liquid nitrogen is converted into gaseous nitrogen in the vaporizer 2, the gas volume expands rapidly. If this gas is guided back to the top of the liquid nitrogen storage tank, it will increase the internal pressure of the liquid nitrogen storage tank.

[0027] The top of the receiving frame 1 is provided with an insertion hole 18, and an insertion rod 19 is slidably connected in the insertion hole 18. One end of the insertion rod 19 is fixedly connected to a cover plate 10. Multiple fixed folding plates 12 are fixedly connected to both sides of the cover plate 10. A grooved strip 11 is fixedly connected to the fixed folding plate 12. A flexible hose 13 is fixedly connected to the bottom of the grooved strip 11. The other end of the flexible hose 13 is connected to a connecting block 15. The connecting block 15 is opened on both sides of the water collection seat 14. The flexible hose 13 is located in the middle of the grooved strip 11. The two ends of the grooved strip 11 are higher than the middle, forming a slope 9. When the moving plate 3 sprays steam, in order to partially return the high-temperature water vapor... For recycling, personnel can insert the insertion rod 19 on the cover plate 10 into the insertion hole 18 on the receiving frame 1 to install the cover plate 10. As water vapor rises, it will condense into liquid water droplets on the surface of the moving plate 3. These liquid water droplets will flow from the surface of the "V"-shaped cover plate 10 into the groove strip 11. The two sides of the groove strip 11 are inclined towards its center. Finally, the water droplets will gather along the inner wall of the groove strip 11 at its center, and then flow along the hose 13 into the connecting block 15 below, and finally fall into the interior of the water collection seat 14. Temperature sensors 17 are provided on the sides of the receiving frames 1 that are close to each other.

[0028] Working process or working principle:

[0029] Steam drawn from the low-pressure steam network enters the hollow movable plate 3 through the connecting flange 4 and is finally ejected from the nozzle 5. At the same time, the two movable plates 3 move towards or away from each other through the double-threaded screw 8 driven by the motor 7, thereby adjusting the spray spacing and controlling the temperature environment around the vaporizer 2. Temperature sensors 17 set on both sides of the receiving frame 1 monitor the ambient temperature in real time and provide feedback to adjust the operation of the motor 7 to maintain the optimal spacing between the movable plates 3 and ensure maximum vaporization efficiency. After the sprayed steam condenses into water droplets on the surface of the movable plate 3, it flows into the water collection seat 14 through the V-shaped cover plate 10, grooved strip 11 and hose 13 system, and is finally discharged or reused through the water outlet pipe 16.

[0030] This invention accelerates the vaporization and pressurization of liquid nitrogen in vaporizer 2 by increasing the ambient temperature around vaporizer 2 with steam, saving pressurization time, speeding up loading in subsequent steps, and shortening the liquid nitrogen downtime. By controlling the steam injection distance and temperature, the temperature of the ambient environment around vaporizer 2 is changed, increasing the vaporization rate of liquid nitrogen and enabling the internal pressure of the storage tank to quickly reach the required level. The condensate recovery system formed by the cover plate 10 and the water collection seat 14 can recycle steam condensate, reducing water waste and lowering operating costs.

[0031] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.

Claims

1. A device for pressurizing a liquid nitrogen storage tank, characterized in that: Includes a receiving frame (1), a vaporizer (2) is fixedly connected inside the receiving frame (1), and a pressure boosting component is provided on the receiving frame (1); The pressurization assembly includes two movable plates (3) slidably connected to the support frame (1). The movable plates (3) are provided with connecting flanges (4). Each of the two movable plates (3) is provided with several nozzles (5) connected to the connecting flanges (4) on opposite sides. The bottom of the two movable plates (3) is connected to a double-threaded screw (8) by a thread. One end of the double-threaded screw (8) is fixedly connected to a motor (7). One side of the support frame (1) is fixedly connected to a connector (6) corresponding to the motor (7). The bottom of the support frame (1) is fixedly connected to a water collection seat (14). The water collection seat (14) is provided with a water outlet pipe (16). The bottom sides of the support frame (1) are provided with ramps (9).

2. The device for pressurizing a liquid nitrogen storage tank according to claim 1, characterized in that: The top of the receiving frame (1) is provided with an insertion hole (18), and an insertion rod (19) is slidably connected in the insertion hole (18). One end of the insertion rod (19) is fixedly connected to a cover plate (10).

3. The device for pressurizing a liquid nitrogen storage tank according to claim 2, characterized in that: Multiple fixed folding plates (12) are fixedly connected to both sides of the cover plate (10). A grooved strip (11) is fixedly connected to the fixed folding plate (12). A flexible tube (13) is fixedly connected to the bottom of the grooved strip (11). A connecting block (15) is connected to the other end of the flexible tube (13). The connecting block (15) is opened on both sides of the water collection seat (14).

4. The device for pressurizing a liquid nitrogen storage tank according to claim 3, characterized in that: The hose (13) is located in the middle of the grooved strip (11), and the two ends of the grooved strip (11) are higher than the middle, forming a slope.

5. The device for pressurizing a liquid nitrogen storage tank according to any one of claims 1-4, characterized in that: The movable plate (3) is a hollow structure, and the inner wall of the water-collecting seat (14) is an inverted trapezoid.

6. The device for pressurizing a liquid nitrogen storage tank according to claim 5, characterized in that: Temperature sensors (17) are provided on the sides of the receiving frames (1) that are close to each other.

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