Rapid temperature change test box with liquid nitrogen

Abstract

The utility model discloses a rapid temperature change test box with liquid nitrogen in the technical field of test boxes, which comprises a test box body, a refrigeration chamber is arranged in an inner cavity of the test box body, an electric heating lamp is arranged on the inner wall of the right side of the refrigeration chamber, a rotary clamping assembly is arranged at the bottom of the refrigeration chamber, and the rotary clamping assembly comprises a driven fluted disc. An upper fixing disc is connected to the inner wall of the top end of the refrigeration chamber; two groups of ventilation pipes are arranged at the top of the test box body; a liquid nitrogen tank is arranged on the outer wall of the left side of the test box body; a refrigeration pipe and a plurality of groups of nozzles are connected to the inner wall of the left side of the refrigeration chamber; a conveying mechanism is arranged between the refrigeration pipe and the liquid nitrogen tank and can drive an experimental article in the test box to rotate, the rotating experimental article can be in full contact with heat generated by the electric heating lamp and liquid nitrogen sprayed out of the spray head, rapid refrigeration and heating of the experimental article are achieved, the temperature change of the test box is rapid, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of test boxes, in particular to a rapid temperature change test box with liquid nitrogen. Background Art

[0002] A test chamber is an experimental instrument used for experiments and tests. It is generally designed to simulate certain specific environments or situations. When conducting experiments, the temperature, humidity, wind speed and other parameters can be adjusted through the control system so that the test can be carried out under different experimental conditions and the experimental results can be obtained. Test chambers are widely used in various experimental fields.

[0003] Publication number CN210935007U proposes a rapid temperature change test box. The utility model provides a screw rod, a slider, a hand wheel, and a push plate. By rotating the hand wheel, the slider slides on the screw rod and drives the push plate to move, so that objects of different sizes can be fixed in the placement table. This structure is simple and easy to operate for staff, solving the problem of short service life of the electric push rod used in the patent.

[0004] When the above-mentioned test chamber cools or heats the experimental items, the experimental items are fixed by moving two sets of push plates in relative directions. The two sets of push plates block both sides of the experimental items. When cooling or heating the experimental items, the cooling or heating speed of the experimental items that are in contact with one side of the push plates is slow, and the cooling or heating of the experimental items is not uniform, which causes the test chamber to require longer cooling or heating time, increases power consumption, and increases production costs. For this reason, we propose a rapid temperature change test chamber with liquid nitrogen. Utility Model Content

[0005] The purpose of the utility model is to provide a rapid temperature change test box with liquid nitrogen to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A rapid temperature change test box with liquid nitrogen comprises a test box body, a front end surface of the test box body is provided with two groups of sealing doors, a controller is installed at the bottom of the two groups of sealing doors, an inner cavity of the test box body is provided with a refrigeration chamber, an electric heating lamp is provided on the right inner wall of the refrigeration chamber, and a rotating clamping assembly is provided at the bottom of the refrigeration chamber, the rotating clamping assembly comprises a driven gear plate which is rotatably connected, and an electric telescopic rod is installed on the top of the driven gear plate, the telescopic end of the electric telescopic rod is connected with a lower supporting plate, an upper fixed plate is connected to the top inner wall of the refrigeration chamber, two groups of ventilation pipes connected with the refrigeration chamber are provided on the top of the test box body, and a control valve is provided on the ventilation pipe, a liquid nitrogen tank is connected to the left outer wall of the test box body, a refrigeration pipe is connected to the left inner wall of the refrigeration chamber, and a plurality of nozzles are connected to the refrigeration pipe, and a conveying mechanism is provided between the refrigeration pipe and the liquid nitrogen tank.

[0008] Further: the conveying mechanism includes a conveying pump, which is located on the left outer wall of the test chamber body, and the liquid inlet of the conveying pump is installed with a connecting pipe, the bottom end of the connecting pipe is connected to the liquid nitrogen tank, an electromagnetic valve is provided on the connecting pipe, the liquid outlet of the conveying pump is connected with a conveying pipe, and the bottom end of the conveying pipe is connected to the refrigeration pipe.

[0009] Further: the rotary clamping assembly also includes a fixing frame, the fixing frame is located on the left inner wall of the test box body, and a servo motor is connected to one side of the fixing frame, a rotating shaft is installed at the output end of the servo motor, a driving gear is connected to the bottom of the rotating shaft, the outer wall of the driving gear is meshed with the driven gear disc, and a bearing is provided in the middle of the lower surface of the driven gear disc, and the bottom of the bearing is connected to the bottom wall of the inner cavity of the test box body.

[0010] Furthermore: portholes are provided on both sets of sealed doors, and an insulation layer is provided between the outer surface of the refrigeration chamber and the inner wall of the test chamber body.

[0011] Furthermore: handles are installed on the front end surfaces of the two sets of sealed doors, and sealing strips are provided at the connection between the sealed doors and the test box body.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model can generate heat through the electric heating lamp to quickly heat up the refrigeration chamber, and can transport the liquid nitrogen in the liquid nitrogen tank to the nozzle through the delivery pump, thereby realizing rapid refrigeration of the refrigeration chamber. The operation of the servo motor can drive the rotating shaft and the driving gear at the bottom to rotate. Since the driving gear is meshed and connected with the driven gear plate, the electric telescopic rod at the top and the lower supporting plate can be driven to rotate. The movement of the lower supporting plate cooperates with the upper fixed plate to fix the position of the experimental object and drive the experimental object to rotate. The rotating experimental object can fully contact with the heat generated by the electric heating lamp and the liquid nitrogen sprayed from the nozzle, thereby realizing rapid refrigeration and heating of the experimental object. The temperature of the test box changes quickly, thereby improving work efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a front structural cross-sectional schematic diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the rotary clamping assembly of the utility model.

[0017] In the figure: 1. test chamber body; 2. sealed door; 3. porthole; 4. controller; 5. ventilation pipe; 6. liquid nitrogen tank; 7. delivery pump; 8. connecting pipe; 9. delivery pipe; 10. refrigeration chamber; 11. insulation layer; 12. electric heating lamp; 13. refrigeration pipe; 14. nozzle; 15. rotating clamping assembly; 150. fixing frame; 151. servo motor; 152. rotating shaft; 153. driving gear; 154. bearing; 155. driven gear plate; 156. electric telescopic rod; 157. lower support plate; 16. upper fixed plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Embodiment 1:

[0020] See also Figure 1-3 The utility model provides a technical solution: a rapid temperature change test box with liquid nitrogen. The test box is an experimental instrument. The publication number CN210935007U proposes a rapid temperature change test box. When the test box in the comparative document cools or heats the experimental items, the experimental items are fixed by moving two sets of push plates in relative directions. The two sets of push plates block the two sides of the experimental items. When cooling or heating the experimental items, the experimental items that are in contact with one side of the push plates are cooled or heated slowly. The cooling or heating of the experimental items is not uniform enough, which results in the need to extend the time for cooling or heating the test box, increasing power consumption and raising production costs. The test box comprises a test box body 1. The front end surface of the test box body 1 is provided with two sets of sealing doors 2. A controller is installed at the bottom of the two sets of sealing doors 2. 4. A refrigeration chamber 10 is provided in the inner cavity of the test box body 1, an electric heating lamp 12 is provided on the right inner wall of the refrigeration chamber 10, and a rotating clamping assembly 15 is provided at the bottom of the refrigeration chamber 10. The rotating clamping assembly 15 includes a driven gear plate 155 that is rotatably connected, and an electric telescopic rod 156 is installed on the top of the driven gear plate 155, and the telescopic end of the electric telescopic rod 156 is connected to a lower supporting plate 157, and an upper fixed plate 16 is connected to the top inner wall of the refrigeration chamber 10. Two groups of ventilation pipes 5 connected to the refrigeration chamber 10 are provided on the top of the test box body 1, and a control valve is provided on the ventilation pipe 5. A liquid nitrogen tank 6 is connected to the left outer wall of the test box body 1, and a refrigeration pipe 13 is connected to the left inner wall of the refrigeration chamber 10, and a plurality of nozzles 14 are connected to the refrigeration pipe 13, and a conveying mechanism is provided between the refrigeration pipe 13 and the liquid nitrogen tank 6.

[0021] Before using the utility model, first, the electrical ends of each electrical device are electrically connected to the external power supply and the electrical ends of the controller 4. When in use, open the two sets of sealed doors 2 movably connected by hinges, place the experimental objects on the lower support plate 157, and start the electric telescopic rod 156. The operation of the electric telescopic rod 156 drives the lower support plate 157 to move up, and cooperates with the fixed upper fixed plate 16 to fix the position of the experimental objects, and then close the sealed door 2, and rotate the clamping assembly 15 to make the driven gear plate 155 rotate. Since the driven gear plate 155 is fixedly connected to the electric telescopic rod 156, the lower support plate 157 and the upper fixed plate 16 can be fixed. The experimental items between the disks 16 rotate, and the electric heating lamp 12 can generate heat to quickly heat up the refrigeration chamber 10. The liquid nitrogen in the liquid nitrogen tank 6 can be transported to the nozzle 14 through the delivery pump 7, thereby realizing rapid refrigeration of the refrigeration chamber 10. Since the driven gear disk 155 can rotate, the experimental items rotate, and the experimental items can fully contact with the heat generated by the electric heating lamp 12 and the liquid nitrogen sprayed from the nozzle 14, thereby realizing rapid refrigeration and heating of the experimental items. The temperature of the test box changes quickly, which improves work efficiency and reduces production costs. After the liquid nitrogen is cooled in the refrigeration chamber 10, the control valve on the ventilation pipe 5 is opened to discharge the vaporized liquid nitrogen through the ventilation pipe 5.

[0022] Among them, preferably, the conveying mechanism includes a conveying pump 7, which is located on the left outer wall of the test box body 1, and the liquid inlet of the conveying pump 7 is installed with a connecting pipe 8, the bottom end of the connecting pipe 8 is connected to the liquid nitrogen tank 6, and a solenoid valve is provided on the connecting pipe 8. The liquid outlet of the conveying pump 7 is connected with a conveying pipe 9, and the bottom end of the conveying pipe 9 is connected to the refrigeration pipe 13; when the conveying pump 7 is started, the solenoid valve on the connecting pipe 8 is opened, and the operation of the conveying pump 7 can convey the liquid nitrogen in the liquid nitrogen tank 6 to the refrigeration pipe 13, and the liquid nitrogen is then sprayed out through multiple groups of nozzles 14.

[0023] Preferably, the rotary clamping assembly 15 also includes a fixing frame 150, the fixing frame 150 is located on the left inner wall of the test box body 1, and a servo motor 151 is connected to one side of the fixing frame 150, a rotating shaft 152 is installed at the output end of the servo motor 151, a driving gear 153 is connected to the bottom of the rotating shaft 152, the outer wall of the driving gear 153 is meshed and connected with a driven gear plate 155, and a bearing 154 is provided in the middle of the lower surface of the driven gear plate 155, and the bottom of the bearing 154 is connected to the bottom wall of the inner cavity of the test box body 1;

[0024] The fixing frame 150 is fixedly connected to the inner wall of the test box body 1, and the operation of the servo motor 151 can drive the rotating shaft 152 and the driving gear 153 at the bottom to rotate. Since the driving gear 153 is meshed and connected with the driven gear plate 155, the bottom of the driven gear plate 155 is rotationally connected to the inner wall of the test box body 1 through the bearing 154, so that the electric telescopic rod 156 fixedly connected to the driven gear plate 155 rotates.

[0025] Preferably, both sets of sealed doors 2 are provided with portholes 3, and an insulation layer 11 is provided between the outer surface of the refrigeration chamber 10 and the inner wall of the test box body 1; the portholes 3 facilitate observation of the state of the internal experimental items, and the insulation layer 11 plays a role in heat preservation to prevent heat loss.

[0026] Embodiment 2:

[0027] Reference Figure 1 This embodiment is different from the first embodiment in that handles are installed on the front end surfaces of the two sets of sealing doors 2, and sealing strips are provided at the connection between the sealing doors 2 and the test box body 1.

[0028] 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 rapid temperature change test chamber with liquid nitrogen, comprising a test chamber body (1), characterized in that: The front end surface of the test box body (1) is provided with two sets of sealed doors (2), and the bottom of the two sets of sealed doors (2) is provided with a controller (4). The inner cavity of the test box body (1) is provided with a refrigeration chamber (10), and the right inner wall of the refrigeration chamber (10) is provided with an electric heating lamp (12), and the bottom of the refrigeration chamber (10) is provided with a rotating clamping assembly (15), and the rotating clamping assembly (15) includes a driven gear plate (155) that is rotatably connected, and an electric telescopic rod (156) is installed on the top of the driven gear plate (155), and the electric telescopic rod (156) is The telescopic end is connected to a lower support plate (157), the top inner wall of the refrigeration chamber (10) is connected to an upper fixed plate (16), the top of the test box body (1) is provided with two groups of ventilation pipes (5) connected to the refrigeration chamber (10), and the ventilation pipes (5) are provided with control valves, the left outer wall of the test box body (1) is connected to a liquid nitrogen tank (6), the left inner wall of the refrigeration chamber (10) is connected to a refrigeration pipe (13), and the refrigeration pipe (13) is connected to a plurality of nozzles (14), and a conveying mechanism is provided between the refrigeration pipe (13) and the liquid nitrogen tank (6).

2. A rapid temperature change test chamber with liquid nitrogen according to claim 1, characterized in that: The delivery mechanism comprises a delivery pump (7), the delivery pump (7) is located on the left outer wall of the test box body (1), and a connecting pipe (8) is installed at the liquid inlet of the delivery pump (7), and the bottom end of the connecting pipe (8) is connected to the liquid nitrogen tank (6).

3. A rapid temperature change test chamber with liquid nitrogen according to claim 2, characterized in that: The connecting pipe (8) is provided with a solenoid valve, the liquid outlet of the delivery pump (7) is connected to a delivery pipe (9), and the bottom end of the delivery pipe (9) is connected to a refrigeration pipe (13).

4. The rapid temperature change test chamber with liquid nitrogen according to claim 1, characterized in that: The rotating clamping assembly (15) further comprises a fixing frame (150), the fixing frame (150) being located on the left inner wall of the test box body (1), and a servo motor (151) being connected to one side of the fixing frame (150), and a rotating shaft (152) being installed at the output end of the servo motor (151).

5. A rapid temperature change test chamber with liquid nitrogen according to claim 4, characterized in that: The bottom of the rotating shaft (152) is connected to a driving gear (153), the outer wall of the driving gear (153) is meshed with a driven gear disc (155), and a bearing (154) is provided in the middle of the lower surface of the driven gear disc (155), and the bottom of the bearing (154) is connected to the bottom wall of the inner cavity of the test box body (1).

6. The rapid temperature change test chamber with liquid nitrogen according to claim 1, characterized in that: Portholes (3) are provided on both sets of sealed doors (2), and a heat-insulating layer (11) is provided between the outer surface of the refrigeration chamber (10) and the inner wall of the test box body (1).

7. The rapid temperature change test chamber with liquid nitrogen according to claim 1, characterized in that: Handles are installed on the front end surfaces of the two sets of sealing doors (2), and sealing strips are provided at the connection between the sealing doors (2) and the test box body (1).

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