Liquid nitrogen vaporization device of liquid nitrogen cooling test chamber

Abstract

The utility model discloses a liquid nitrogen vaporization device of a liquid nitrogen cooling test box, which belongs to the technical field of liquid nitrogen vaporization equipment and comprises a vaporization box for liquid nitrogen vaporization, a first heat insulation sleeve and a second heat insulation sleeve, the first heat insulation sleeve and the second heat insulation sleeve are arranged outside the vaporization box, a sealing cover is mounted at the top of the vaporization box, and a plurality of electric heating tubes are mounted in the vaporization box. Fixing plates are fixed to the outer walls of the two sides of the first heat insulation sleeve, a fixing box fixedly connected with the second heat insulation sleeve is movably connected between the two fixing plates, a rotating column is rotationally connected into the fixing box, a gear is fixed to the outer wall of the rotating column, and racks meshed with the gear are arranged on the upper side and the lower side of the gear. A guide block is fixed to one end of the rack, and a fixing pin is fixed to the outer wall of one side of the guide block. The liquid nitrogen vaporization device of the liquid nitrogen cooling test box has a protection function, and in the liquid nitrogen vaporization process, a worker can be prevented from making contact with the vaporization box with the high temperature, so that the worker is prevented from being injured.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid nitrogen vaporization equipment, and in particular relates to a liquid nitrogen vaporization device for a liquid nitrogen cooling test box. Background Art

[0002] Nitrogen is actually in gaseous form, and gaseous nitrogen has a large volume. Storing a large amount of gaseous nitrogen consumes too much space, so nitrogen is mostly stored in liquid form. In actual applications, there are many scenarios that require the use of gaseous nitrogen, such as synthetic raw materials for chemical industry, protective steam, etc. Most vaporizers are industrial grade, large in size, with many components, and inflexible in use. For example, if a laboratory needs a small amount of gaseous nitrogen for experiments, if a large machine is used, the operation will be inconvenient and the cost of operation will be high.

[0003] Some liquid nitrogen vaporization devices in the prior art vaporize liquid nitrogen by heating water in a heat exchange box. However, due to the lack of protection on the outside of the heat exchange box, the temperature outside the heat exchange box is high after the heat exchange box is heated. When a worker accidentally comes into contact with the heat exchange box, the worker may be easily scalded.

[0004] Referring to the Chinese authorized patent with authorization announcement number: CN211551156U: Electric heating water bath vaporizer for processing liquid nitrogen, this utility model achieves the purpose of being used in conjunction with a steam water bath vaporizer to provide sufficient nitrogen. However, it also has the above-mentioned problem that after heating the water in the box, the temperature outside the box is high. Due to the lack of protection on the outside of the box, when the staff accidentally come into contact with the box, it is easy to cause burns to the staff. Utility Model Content

[0005] The utility model aims to provide a liquid nitrogen vaporization device for a liquid nitrogen cooling test box, so as to solve the problem in the above-mentioned background technology that after the water in the box is heated, the temperature outside the box is relatively high, and since the outside of the box lacks protection, when the staff accidentally come into contact with the box, it is easy to cause scald to the staff.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquid nitrogen vaporization device for a liquid nitrogen cooling test box, comprising a vaporization box for vaporizing liquid nitrogen and a first insulation sleeve and a second insulation sleeve arranged outside the vaporization box, a sealing cover is installed on the top of the vaporization box, and a plurality of electric heating tubes are installed in the vaporization box, and fixing plates are fixed to the outer walls of both sides of the first insulation sleeve, and a fixing box fixedly connected to the second insulation sleeve is movably connected between the two fixing plates;

[0007] A rotating column is rotatably connected inside the fixed box, a gear is fixed to the outer wall of the rotating column, racks meshing with the gear are provided on the upper and lower sides of the gear, a guide block is fixed to one end of the rack, a fixing pin is fixed to the outer wall of the guide block away from the rack, and fixing holes matching the fixing pins are provided on the opposite surfaces of the two fixed plates.

[0008] In a further embodiment, two limit blocks are symmetrically fixed to the bottom wall of the inner cavity of the fixing box, a through hole for the fixing pin to move is formed on the limit block, and a limit ring is fixed to the outer wall of the fixing pin.

[0009] In a further embodiment, a sealing strip is fixed to an outer wall of the thermal insulation sleeve 1 on one side facing the thermal insulation sleeve 2, and a sealing groove matching the sealing strip is opened on an outer wall of the thermal insulation sleeve 2 on one side.

[0010] In a further embodiment, a feed pipe and an outlet pipe are respectively fixed to the surface of the sealing cover, and a heat exchange pipe for vaporizing liquid nitrogen is installed between the feed pipe and the outlet pipe.

[0011] In a further embodiment, a water inlet hole and a drain hole are respectively opened on one side outer wall of the vaporizer box, and a water inlet pipe and a drain pipe are respectively fixed to the water inlet hole and the drain hole of the vaporizer box.

[0012] In a further embodiment, an exhaust hole is formed on the outer wall of the other side of the vaporizer box, and an exhaust pipe is fixed in the exhaust hole of the vaporizer box.

[0013] Technical effects and advantages of the utility model:

[0014] The liquid nitrogen vaporization device of the liquid nitrogen cooling test box, through the arrangement of the first and second insulation sleeves, can block the heat dissipated by the vaporization box when heating the water in the vaporization box, and can also prevent the staff from directly contacting the vaporization box, thereby preventing the staff from being scalded by the high temperature;

[0015] The rotating column drives the gear to rotate, so that the two gear rings move toward each other, pushing the guide block box fixing pin to move, so that the fixing pin is inserted into the fixing hole of the fixing plate, so that the insulation sleeve 1 and the insulation sleeve 2 are stably connected;

[0016] By setting up multiple electric heating tubes, different numbers of electric heating tubes can be turned on according to the needs of liquid nitrogen vaporization in the test box, thereby adjusting the vaporization speed of the liquid nitrogen. The liquid nitrogen vaporization device of the liquid nitrogen cooling test box has a protective function. During the process of liquid nitrogen vaporization, it can prevent workers from contacting the vaporization box with a higher temperature, thereby preventing workers from being injured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the vaporizer box of the utility model;

[0020] Figure 3 It is a schematic structural diagram of the vaporizer box of the utility model in a cut-away state;

[0021] Figure 4 It is a structural schematic diagram of a heat insulation sleeve 1 of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the fixing box of the utility model in a cut-away state.

[0023] In the figure: 1. vaporizer box; 2. sealing cover; 3. feed pipe; 4. exhaust pipe; 5. heat exchange pipe; 6. electric heating pipe; 7. water inlet pipe; 8. drain pipe; 9. exhaust pipe; 10. insulation sleeve 1; 11. insulation sleeve 2; 12. sealing strip; 13. fixing plate; 14. fixing box; 15. rotating column; 16. gear; 17. rack; 18. guide block; 19. limit block; 20. fixing pin; 21. limit ring. DETAILED DESCRIPTION

[0024] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0025] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0026] See also Figure 1-5The utility model provides a liquid nitrogen cooling test box liquid nitrogen vaporization device, including a vaporization box 1 for liquid nitrogen vaporization and a heat insulation sleeve 10 and a heat insulation sleeve 2 11 arranged outside the vaporization box 1, a sealing cover 2 is installed on the top of the vaporization box 1 by bolts, a feed pipe 3 and an outlet pipe 4 are respectively fixed on the surface of the sealing cover 2, a pressure gauge is installed on the feed pipe 3, a control valve is installed on the outlet pipe 4, a heat exchange pipe 5 for liquid nitrogen vaporization is installed between the feed pipe 3 and the outlet pipe 4, a plurality of electric heating pipes 6 are installed in the vaporization box 1, and the switches of the plurality of electric heating pipes 6 can be controlled respectively;

[0027] A water inlet hole and a drain hole are respectively provided on the outer wall of one side of the vaporizer box 1, and a water inlet pipe 7 and a drain pipe 8 are respectively fixed to the water inlet hole and the drain hole of the vaporizer box 1, and an exhaust hole is provided on the outer wall of the other side of the vaporizer box 1, and an exhaust pipe 9 is fixed in the exhaust hole of the vaporizer box 1. Control valves are installed on the water inlet pipe 7, the drain pipe 8 and the exhaust pipe 9, and water is injected into the vaporizer box 1 through the water inlet pipe 7. The electric heating pipe 6 heats the water in the vaporizer box 1, and liquid nitrogen is injected into the heat exchange pipe 5 through the feed pipe 3. The heated water heats the liquid nitrogen in the heat exchange pipe 5 to vaporize the liquid nitrogen, and the vaporized liquid nitrogen is injected into the experimental box through the outlet pipe 4. A pressure sensor can be installed at a suitable position in the vaporizer box 1. When the pressure in the vaporizer box 1 is relatively high, the gas in the vaporizer box 1 is released through the exhaust pipe 9. By setting a plurality of electric heating pipes 6, different numbers of electric heating pipes 6 can be opened according to the demand for vaporization of liquid nitrogen in the experimental box, thereby adjusting the vaporization speed of the liquid nitrogen;

[0028] A sealing strip 12 is fixed to the outer wall of the insulation sleeve 10 on one side facing the insulation sleeve 2 11, and a sealing groove matching the sealing strip 12 is opened on the outer wall of the insulation sleeve 2 11 on one side to ensure the sealing between the insulation sleeve 10 and the insulation sleeve 2 11. At the same time, the inner walls of the insulation sleeve 10 and the insulation sleeve 2 11 can be installed with thermal insulation layers to block the heat generated by the vaporizer 1. Sealing rings are provided at the positions where the insulation sleeve 10 and the insulation sleeve 2 11 contact the water inlet pipe 7, the drain pipe 8 and the exhaust pipe 9. The outer walls of both sides of the insulation sleeve 10 are fixed with fixing plates 13 by bolts, and a fixing box 14 fixedly connected to the insulation sleeve 2 11 is movably connected between the two fixing plates 13;

[0029] A rotating column 15 is rotatably connected to the fixed box 14 through a bearing, and a gear 16 is fixed to the outer wall of the rotating column 15. One end of the rotating column 15 extends outside the fixed box 14, and a rotating knob is fixed to the end surface of the rotating column 15 located outside the fixed box 14. A threaded hole is provided on the rotating knob, and a positioning bolt is threadedly connected to the threaded hole of the rotating knob. Tightening the positioning bolt so that the positioning bolt is tightly attached to the outer wall of the fixed box 14 can fix the position of the rotating knob and the rotating column 15 to prevent the gear 16 from rotating outside.

[0030] The upper and lower sides of the gear 16 are provided with racks 17 meshing with the gear 16, a guide block 18 is fixed at one end of the rack 17, a fixing pin 20 is fixed to the outer wall of the guide block 18 away from the rack 17, and the opposite surfaces of the two fixing plates 13 are provided with fixing holes matching the fixing pin 20, and the bottom wall of the inner cavity of the fixing box 14 is symmetrically fixed with two limit blocks 19, and the limit blocks 19 are provided with through holes for the movement of the fixing pin 20, which can support the fixing pin 20 and limit the position of the rack 17 at the same time, and the outer wall of the fixing pin 20 is welded with a limit ring 21, and the limit ring 21 is in contact with the limit block 19, which can limit the moving distance of the fixing pin 20 Restriction is performed to prevent the fixing pin 20 from moving too far into the fixing box 14. Through the arrangement of the heat insulating sleeve 1 10 and the heat insulating sleeve 2 11, when the water in the vaporizer box 1 is heated, the heat insulating sleeve 1 10 and the heat insulating sleeve 2 11 can block the heat dissipated from the vaporizer box 1, and can also prevent the staff from directly contacting the vaporizer box 1, thereby preventing the staff from being scalded by high temperature. The gear 16 is driven to rotate by the rotating column 15, so that the two gear rings move toward each other, pushing the guide block 18 and the fixing pin 20 to move, so that the fixing pin 20 is inserted into the fixing hole of the fixing plate 13, so that the heat insulating sleeve 10 and the heat insulating sleeve 2 11 are stably connected.

[0031] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The control method of the utility model is controlled by a controller, and the control circuit of the controller can be realized by simple programming by technicians in this field. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0032] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] Working principle:

[0034] The liquid nitrogen vaporization device of the liquid nitrogen cooling test box, when in use, water is injected into the vaporization box 1 through the water inlet pipe 7, the electric heating tube 6 heats the water in the vaporization box 1, and liquid nitrogen is injected into the heat exchange tube 5 through the feed pipe 3. The heated water heats the liquid nitrogen in the heat exchange tube 5 to vaporize the liquid nitrogen, and the vaporized liquid nitrogen is injected into the test box through the gas outlet pipe 4. When the pressure in the vaporization box 1 is relatively high, the gas in the vaporization box 1 is released through the exhaust pipe 9. According to the demand for vaporization of liquid nitrogen in the test box, different numbers of electric heating tubes 6 are turned on to adjust the vaporization speed of the liquid nitrogen;

[0035] By setting the heat insulating sleeve 1 10 and the heat insulating sleeve 2 11, when the water in the vaporizer box 1 is heated, the heat insulating sleeve 1 10 and the heat insulating sleeve 2 11 block the heat dissipated from the vaporizer box 1, and also prevent the staff from directly contacting the vaporizer box 1, thereby preventing the staff from being scalded by the high temperature.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid nitrogen cooling test box liquid nitrogen vaporization device, comprising a vaporization box (1) for vaporizing liquid nitrogen and a first insulation sleeve (10) and a second insulation sleeve (11) arranged outside the vaporization box (1), characterized in that: A sealing cover (2) is installed on the top of the vaporizer (1), and a plurality of electric heating tubes (6) are installed in the vaporizer (1). The outer walls of both sides of the thermal insulation sleeve (10) are fixed with fixing plates (13), and a fixing box (14) fixedly connected to the thermal insulation sleeve (11) is movably connected between the two fixing plates (13); A rotating column (15) is rotatably connected inside the fixed box (14), a gear (16) is fixed to the outer wall of the rotating column (15), a rack (17) meshing with the gear (16) is provided on the upper and lower sides of the gear (16), a guide block (18) is fixed to one end of the rack (17), a fixing pin (20) is fixed to the outer wall of the guide block (18) away from the rack (17), and fixing holes matching the fixing pin (20) are provided on the opposite surfaces of the two fixed plates (13).

2. The liquid nitrogen vaporization device of the liquid nitrogen cooling test box according to claim 1, characterized in that: Two limit blocks (19) are symmetrically fixed to the bottom wall of the inner cavity of the fixing box (14), the limit blocks (19) are provided with through holes for the fixing pin (20) to move, and a limit ring (21) is fixed to the outer wall of the fixing pin (20).

3. The liquid nitrogen vaporization device of the liquid nitrogen cooling test box according to claim 1, characterized in that: A sealing strip (12) is fixed to an outer wall of the first heat insulation sleeve (10) on one side facing the second heat insulation sleeve (11), and a sealing groove matching the sealing strip (12) is provided on an outer wall of the second heat insulation sleeve (11).

4. The liquid nitrogen vaporization device of the liquid nitrogen cooling test box according to claim 1, characterized in that: A feed pipe (3) and an air outlet pipe (4) are respectively fixed to the surface of the sealing cover (2), and a heat exchange pipe (5) for vaporizing liquid nitrogen is installed between the feed pipe (3) and the air outlet pipe (4).

5. The liquid nitrogen vaporization device of the liquid nitrogen cooling test box according to claim 1, characterized in that: A water inlet hole and a water drain hole are respectively provided on one side outer wall of the vaporizer box (1), and a water inlet pipe (7) and a water drain pipe (8) are respectively fixed to the water inlet hole and the water drain hole of the vaporizer box (1).

6. The liquid nitrogen vaporization device of the liquid nitrogen cooling test box according to claim 5, characterized in that: An exhaust hole is provided on the outer wall of the other side of the vaporizer box (1), and an exhaust pipe (9) is fixed in the exhaust hole of the vaporizer box (1).

Images