A laboratory low-temperature testing and monitoring device

Abstract

This invention relates to the field of monitoring equipment technology, specifically a laboratory low-temperature testing monitoring device, comprising two longitudinal beams that are parallel to each other and symmetrically distributed from left to right; and a movable crossbeam perpendicular to the longitudinal beams, with both ends of the crossbeam slidingly engaged with the two longitudinal beams respectively. Through the arrangement of the longitudinal beams and the movable crossbeam, and via two drive components, this invention can control a monitoring camera to move cyclically along a U-shaped path, thereby monitoring several compressors located on both sides. Compared to traditional methods of manual visual observation or monitoring via multiple cameras, this invention can simultaneously meet the oil level monitoring needs of multiple compressors at a lower cost.

Description

Technical Field

[0001] This invention relates to the field of monitoring equipment technology, specifically to a laboratory low-temperature testing monitoring device. Background Technology

[0002] In the field of compressor performance testing, monitoring operating parameters under low-temperature conditions is a crucial step in assessing equipment reliability. Among these parameters, the compressor's oil level directly affects its lubrication performance, operational stability, and service life; therefore, continuous and precise monitoring of the oil level is essential during low-temperature testing.

[0003] Currently, low-temperature testing of compressors is typically conducted in dedicated cryogenic laboratories, where the ambient temperature is strictly controlled between -45°C and -50°C to simulate equipment operation under extreme low-temperature conditions. However, existing oil level monitoring methods have significant drawbacks. These methods rely on personnel entering the laboratory and visually observing the compressor's oil level markings. Because the laboratory temperature is extremely low, far exceeding human tolerance, personnel are limited to a few minutes at a time, making real-time tracking and recording of oil level changes impossible. This operating mode not only struggles to capture dynamic fluctuations in oil levels but also risks missing abnormal oil level conditions due to excessively long observation intervals, affecting the completeness and accuracy of the test data. Furthermore, frequent entry and exit from the cryogenic environment poses a potential threat to the health of personnel.

[0004] To address the aforementioned issues, the industry has attempted to use video equipment to replace manual observation. However, in practical applications, it has been found that multiple compressors of different models or batches are typically tested simultaneously in cryogenic laboratories, with dozens of compressors being tested at once. Configuring a separate camera and corresponding image transmission and storage module for each compressor would significantly increase equipment procurement costs, installation and commissioning costs, and subsequent maintenance costs. In summary, existing technologies, whether manual visual observation or multi-camera monitoring solutions, cannot achieve real-time, efficient, and stable monitoring of oil levels in multiple compressors in cryogenic laboratories while meeting low-cost requirements. Therefore, we propose a laboratory cryogenic testing monitoring device to effectively address the aforementioned drawbacks. Summary of the Invention

[0005] The purpose of this invention is to provide a laboratory low-temperature testing and monitoring device to solve the problems mentioned in the background art.

[0006] This invention is achieved through the following technical solution: a laboratory low-temperature testing and monitoring device, comprising:

[0007] Two longitudinal beams, which are parallel to each other and symmetrically distributed from left to right;

[0008] A movable crossbeam is perpendicular to the longitudinal beams, and both ends of the movable crossbeam are slidably engaged with the two longitudinal beams respectively.

[0009] A support frame, which is movably mounted on a movable crossbeam, is equipped with a monitoring camera and a supplementary light on one side of its top.

[0010] A first drive assembly is disposed between two longitudinal beams, and the first drive assembly is used to drive the movable crossbeam to slide longitudinally.

[0011] The second drive assembly is disposed on the movable crossbeam and is used to drive the support frame to slide laterally.

[0012] When the support frame moves from one end of the movable crossbeam to the other, the support frame can rotate 180° so that the surveillance camera and the fill light are both facing the side away from the center of the movable crossbeam.

[0013] Optionally, the support frame includes an outer protective tube and a lifting tube, the lifting tube being movably nested inside the outer protective tube, a connecting seat being provided on one side of the top of the lifting tube, and a mounting bracket being provided on the connecting seat, with the monitoring camera and the supplementary light both mounted on the mounting bracket.

[0014] Optionally, two connecting ribs are provided between the two longitudinal beams, and the two connecting ribs are distributed in a front-to-back manner; the first driving assembly includes a driving motor and a driving screw, the driving motor is disposed on one of the connecting ribs, one end of the driving screw is coaxially connected to the output shaft of the driving motor, and the driving screw is also threadedly engaged with the moving crossbeam.

[0015] Optionally, the movable crossbeam is a hollow square tube structure, the second drive assembly is located inside the movable crossbeam, the movable end of the second drive assembly is provided with a column, the top wall of the movable crossbeam is provided with a strip-shaped opening for the column to pass through, and the bottom of the support frame is rotatably connected to the column.

[0016] Optionally, the top front and rear sides of the movable crossbeam are symmetrically provided with guard plates, and through openings are provided at the diagonal positions of the two guard plates. A storage part is provided on the back of the two guard plates and at the through openings. A rack is movably provided in the storage part. A driven gear is fitted at the bottom of the support frame. When the support frame passes through any of the racks, the support frame can rotate 180°.

[0017] Optionally, the inner end of the rack is provided with a guide post, which movably passes through the storage part. A return spring is sleeved on the outside of the guide post. The two ends of the return spring are respectively connected to the inner wall of the storage part and the rack. When the return spring is not subjected to external force, the rack retracts into the storage part.

[0018] There are blocking parts on both sides of the diagonal between the two longitudinal beams. The two blocking parts correspond one-to-one with the two guide posts. When the moving cross frame moves to the side close to one of the blocking parts, the blocking part abuts against the corresponding guide post, and the corresponding rack extends out of the through-hole so that the rack can mesh with the driven gear when the support frame passes by.

[0019] Optionally, the supplementary light includes a lampshade and a bulb, the bulb being slidably fitted to the lampshade along its axial direction, a lamp holder being provided inside the lampshade, the bulb being mounted on the lamp holder, an iron ring being provided on the lamp holder, and an electromagnet being provided at the inner end of the lampshade, the electromagnet and the iron ring being distributed opposite to each other.

[0020] Optionally, conductive strips are provided on both the front and rear sides above the movable crossbar, and a power supply is also provided on the movable crossbar. The positive and negative terminals of the power supply are connected to the two conductive strips through wires.

[0021] Both leads of the electromagnet are connected to conductive posts, which are located on both sides of the bottom of the support frame. When the support frame passes between the two conductive strips, the two conductive posts can abut against the two conductive strips respectively.

[0022] Optionally, the lampshade is further provided with several light rods distributed along its own axis. The light rods are slidably engaged with the lamp holder. A push spring is sleeved on the outside of the light rod. In its natural state, the push spring is in a compressed state.

[0023] Optionally, the top surface of the connecting seat is also provided with a rotating seat, and the mounting bracket is fixedly mounted on the rotating seat.

[0024] Compared with the prior art, the present invention provides a laboratory low-temperature testing and monitoring device, which has the following features:

[0025] Beneficial effects:

[0026] 1. This invention, through the setting of longitudinal beams and movable crossbeams, and through two drive components, can control the monitoring camera to move cyclically along a U-shaped path, thereby monitoring several compressors located on both sides. Compared with the traditional method of manual observation or monitoring by multiple sets of cameras, this invention can meet the oil level monitoring needs of multiple compressors at the same time with lower cost.

[0027] 2. The present invention has two racks that are diagonally staggered, and when the moving crossbeam is located on one side of the longitudinal beam, only one rack is in the extended state. Therefore, when the support frame moves from one end of the moving crossbeam to the other end, the monitoring camera can automatically turn.

[0028] 3. The illumination range of the supplementary light in this invention is adjustable. Specifically, when the monitoring camera moves from one side away from the compressor to the other, the illumination range of the supplementary light is small and the brightness is high. When the monitoring camera is located close to the compressor, the illumination range of the supplementary light is large and the brightness is relatively weak, thereby meeting the supplementary lighting needs at different locations so that the staff can observe the compressor oil level more timely and accurately. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the longitudinal beam and movable crossbeam of the present invention;

[0031] Figure 3 This is a schematic diagram of the protective plate structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the support frame structure of the present invention;

[0033] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0034] Figure 6 for Figure 3 Enlarged view of point B in the image;

[0035] Figure 7 for Figure 4 Enlarged view of the corresponding area at point C;

[0036] Figure 8 This is a patrol path diagram of the surveillance camera of the present invention.

[0037] In the diagram: 100, longitudinal beam; 101, connecting rib; 102, slide rail; 103, slide block; 104, blocking part; 200, moving crossbeam; 201, strip opening; 202, guard plate; 203, storage part; 204, rack; 205, guide post; 206, return spring; 207, conductive strip; 208, power supply; 300, first drive assembly; 301, drive motor; 302, drive screw; 400, support. Frame; 401, outer protective tube; 402, lifting tube; 403, connecting seat; 404, mounting bracket; 405, rotating seat; 406, driven gear; 500, second drive assembly; 501, column; 600, surveillance camera; 700, supplementary light; 701, lampshade; 702, bulb; 703, lamp holder; 704, electromagnet; 705, iron ring; 706, light rod; 707, push spring; 708, conductive column. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] Currently, during low-temperature testing of multiple compressors in cryogenic laboratories, to save space and facilitate manual inspection, the compressors are typically arranged in a matrix, meaning they are divided into several rows, with each row containing several compressors. Traditionally, workers visually inspect the compressor oil levels inside the laboratory. However, due to the low temperatures, workers cannot remain in the laboratory for extended periods, making it impossible to monitor real-time oil level changes.

[0040] Furthermore, while remote observation via cameras can avoid workers entering the laboratory, each compressor requires an independent camera, significantly increasing testing costs. To address these issues, this invention proposes the following technical solution:

[0041] Example 1: Please refer to Figure 1 - Figure 5 A laboratory low-temperature testing and monitoring device includes two longitudinal beams 100, which are parallel to each other and symmetrically distributed from left to right; two connecting ribs 101 are provided between the two longitudinal beams 100, which are distributed front to back; therefore, the two longitudinal beams 100 and the two connecting ribs 101 together form an opening-shaped structure.

[0042] like Figure 1 and Figure 2 As shown, a movable crossbeam 200 is provided between the two longitudinal beams 100. The movable crossbeam 200 is perpendicular to the longitudinal beams 100, and both ends of the movable crossbeam 200 are slidably engaged with the two longitudinal beams 100 respectively. Specifically, the top surface of the longitudinal beam 100 is provided with a slide rail 102 distributed along its own length direction. A slide block 103 is slidably provided on the slide rail 102. The slide block 103 is bolted to the bottom surface of the movable crossbeam 200 to enhance the stability of the movable crossbeam 200 when it slides back and forth.

[0043] This embodiment also includes a first driving component 300, which is disposed between the two longitudinal beams 100. The first driving component 300 is used to drive the movable crossbeam 200 to slide longitudinally. Figure 2As shown, the first drive assembly 300 includes a drive motor 301 and a drive screw 302. The drive motor 301 is mounted on one of the connecting ribs 101. One end of the drive screw 302 is coaxially connected to the output shaft of the drive motor 301. The axial direction of the drive screw 302 is consistent with the length direction of the slide rail 102. The drive screw 302 is also threadedly engaged with the movable crossbeam 200. It should be noted that the bottom wall of the movable crossbeam 200 is provided with a mating block, which is threadedly connected to the drive screw 302; therefore, when the drive motor 301 controls the screw to rotate, it can control the movable crossbeam 200 to slide back and forth.

[0044] This embodiment also includes a support frame 400 and a second drive assembly 500. The support frame 400 is movably mounted on the movable crossbeam 200, and a monitoring camera 600 and a supplementary light 700 are provided on one side of the top of the support frame 400. The second drive assembly 500 is mounted on the movable crossbeam 200 and is used to drive the support frame 400 to slide laterally. Specifically, the movable crossbeam 200 is a hollow square tube structure. The second drive assembly 500 is located inside the movable crossbeam 200. A column 501 is provided at the movable end of the second drive assembly 500. A strip-shaped opening 201 for the column 501 to pass through is opened on the top wall of the movable crossbeam 200. The bottom of the support frame 400 is rotatably connected to the column 501. The second drive assembly 500 can be a linear slide, which directly controls the left and right lateral movement of the support frame 400.

[0045] Furthermore, when the support frame 400 moves from one end of the movable crossbeam 200 to the other, the support frame 400 can rotate 180° so that both the surveillance camera 600 and the supplementary light 700 face the side away from the center of the movable crossbeam 200. That is, when the support frame 400 is at both ends of the movable crossbeam 200, its surveillance camera 600 and supplementary light 700 face the side away from the center of the movable crossbeam 200.

[0046] In summary, in practical application, both longitudinal beams 100 are positioned between the two rows of compressors to be monitored, and the length of the longitudinal beams 100 is approximately equal to the length of a single row of compressors to be monitored. During actual monitoring, in order for the camera to sequentially monitor multiple compressors, the support frame 400 needs to carry the camera along the two longitudinal beams 100 and the two connecting ribs 101 in a U-shaped path.

[0047] Specifically, in the initial state, the movable crossbeam 200 is located on one side of the longitudinal beam 100, and the support frame 400 is located at one end of the movable crossbeam 200, while the monitoring camera 600 and the supplementary light 700 are both pointed at one of the compressors; then, the first drive assembly 300 controls the movable crossbeam 200 to slide longitudinally a certain distance, so that the monitoring camera 600 is aimed at the next compressor; after the movable crossbeam 200 moves from one side of the longitudinal beam 100 to the other side, the second drive assembly 500 drives the support frame 400 to move laterally, and during this process, the support frame 400 automatically rotates half a turn, so that the monitoring camera 600 is aimed at the compressor on the other side, and so on, so that the support frame 400 moves back and forth along the zigzag path, thereby monitoring the oil level of multiple compressors in sequence.

[0048] On the other hand, this embodiment also includes a terminal monitoring device, which includes a host and a display screen. The host is used to receive the images captured by the monitoring camera 600 and display the images on the display screen so that the user can observe them.

[0049] Example 2: Please refer to Figure 1 - Figure 6 This application also proposes a laboratory low-temperature testing and monitoring device. The difference between this embodiment and Embodiment 1 is that:

[0050] The support frame 400 includes an outer protective tube 401 and a lifting tube 402. The lifting tube 402 is movably nested inside the outer protective tube 401. A connecting seat 403 is provided on one side of the top of the lifting tube 402, and a mounting bracket 404 is provided on the connecting seat 403. The monitoring camera 600 and the supplementary light 700 are both mounted on the mounting bracket 404. The side wall of the outer protective tube 401 is also provided with fixing bolts. When the fixing bolts are tightened so that their inner ends abut against the lifting tube 402, the height of the lifting tube 402 can be fixed.

[0051] The following is a detailed description of how the support frame 400 achieves automatic rotation:

[0052] The top front and rear sides of the movable crossbeam 200 are symmetrically provided with guard plates 202. Each guard plate 202 has a through opening at a diagonal position. The back of the two guard plates 202 and located at the through opening is provided with a storage part 203. A rack 204 is movably installed in the storage part 203. The outer protective tube 401 is rotatably sleeved on the outside of the column 501 through a damping bearing. The bottom of the outer protective tube 401 is fixedly sleeved with a driven gear 406. When the support frame 400 passes through any of the racks 204, the support frame 400 can rotate 180°. The inner end of the rack 204 is provided with a guide post 205, which movably passes through the storage part 203. A return spring 206 is sleeved on the outside of the guide post 205. The two ends of the return spring 206 are connected to the inner wall of the storage part 203 and the rack 204, respectively. When the return spring 206 is not subjected to external force, the rack 204 is retracted into the storage part 203. That is, when the rack 204 is not subjected to external force, the rack 204 cannot mesh with the driven gear 406. Only when the rack 204 extends outward and the support frame 400 passes through the rack 204 can meshing occur.

[0053] Furthermore, two blocking parts 104 are provided on opposite sides between the two longitudinal beams 100. The two blocking parts 104 correspond one-to-one with the two guide posts 205. Specifically, in this embodiment, the blocking parts 104 are fixedly installed on the connecting ribs 101. When the moving crossbeam 200 moves to the side close to one of the blocking parts 104, the blocking part 104 abuts against the corresponding guide post 205, and the corresponding rack 204 extends out of the through opening so that when the support frame 400 passes by, the rack 204 can mesh with the driven gear 406.

[0054] Therefore, in practical application, in the initial state, the movable crossbeam 200 can be located in front of the longitudinal beam 100, and the support frame 400 can be located at the left end of the movable crossbeam 200. At this time, the monitoring camera 600 is used to monitor the compressor located at the corresponding position on the left. When the movable crossbeam 200 moves backward under the control of the first drive assembly 300, the monitoring camera 600 can monitor several compressors located on the left in sequence. When the movable crossbeam 200 moves to the rearmost position, a rack 204 located on the left extends outward under the push of the blocking part 104. At this time, the support frame 400 moves to the right, and the support frame 400 can rotate half a turn under the action of the rack 204.

[0055] Since the distance between the two rows of compressors is typically several meters, the length of the moving crossbeam 200 is also roughly equivalent to the distance between the two rows of compressors. If the monitoring camera 600 cannot immediately rotate to face the opposite direction during the movement of the support frame 400 from one end of the moving crossbeam 200 to the other, the user's waiting time will inevitably increase during long-distance transfers, preventing the user from immediately obtaining the oil level information of the compressor on the other side. In this embodiment, the two racks 204 are diagonally staggered, enabling the support frame 400 to immediately rotate to face the opposite direction during lateral movement, thus helping staff to respond immediately when the oil level is abnormal.

[0056] Example 3: Please refer to Figure 1 - Figure 8 This application also proposes a laboratory low-temperature testing and monitoring device. The difference between this embodiment and Embodiment 2 is that:

[0057] The supplementary lighting 700 includes a lampshade 701 and a bulb 702. The bulb 702 slides along the axial direction of the lampshade 701. Inside the lampshade 701, there is a lamp holder 703. The bulb 702 is mounted on the lamp holder 703, which has an iron ring 705. An electromagnet 704 is located at the inner end of the lampshade 701, with the electromagnet 704 and the iron ring 705 distributed opposite each other. Specifically, inside the lampshade 701, there are several light rods 706 distributed along their own axial direction. The light rods 706 slide along the lamp holder 703, and a push spring 707 is sleeved on the outside of each light rod. In its natural state, the push spring 707 is compressed. When the electromagnet 704 is de-energized, the bulb 702 is located away from the electromagnet 704; conversely, when the electromagnet 704 is energized, the magnetic force overcomes the push spring 707, causing the bulb 702 to be located closer to the electromagnet 704.

[0058] It should be noted that when the bulb 702 moves from the side away from the electromagnet 704 to the side closer to the electromagnet 704, it is equivalent to the bulb 702 entering a deeper position inside the lamp cover 701. Therefore, the light emitted by the supplementary light 700 is more concentrated, that is, the illumination range of the supplementary light 700 will become smaller, but the intensity will increase.

[0059] Furthermore, conductive strips 207 are provided on both the front and rear sides of the upper part of the movable crossbeam 200, and a power supply 208 is also provided on the movable crossbeam 200. The positive and negative terminals of the power supply 208 are connected to the two conductive strips 207 through wires. In this embodiment, the two conductive strips 207 are located on the facing surfaces of the two protective plates 202. The two leads of the electromagnet 704 are connected to conductive posts 708, and the two conductive posts 708 are located on both sides of the bottom of the support frame 400. Specifically, the two conductive posts 708 are located on the front and rear sides of the column 501, respectively. When the support frame 400 passes between the two conductive strips 207, the two conductive posts 708 can abut against the two conductive strips 207 respectively. In this embodiment, the conductive strips 207 and conductive posts 708 are both made of copper, which has good conductivity. When the two conductive posts 708 abut against the two conductive strips 207 respectively, the electromagnet 704 is in an energized state; otherwise, the electromagnet 704 is always in an unenergized state.

[0060] It is worth mentioning that, in some embodiments, the top surface of the connecting seat 403 is also provided with a rotating seat 405, and the mounting bracket 404 is fixedly mounted on the rotating seat 405. The rotating seat 405 includes a base plate and a bottom cylinder, which are rotatably connected by a damping bearing. The bottom cylinder is used to fix the connecting seat 403, while the mounting bracket 404 is fixed to the base plate. The function of the rotating seat 405 is to facilitate the adjustment of the orientation of the surveillance camera 600.

[0061] In summary, in practical application, during the movement of the support frame 400 from one end of the movable crossbeam 200 to the other, the conductive post 708 can abut against the conductive strip 207, thereby energizing the electromagnet 704 and attracting the bulb 702, thus reducing the illumination range and increasing the illumination brightness. This is because when the supplementary light 700 is far from the compressor, if it is in a large-area low-brightness illumination mode, the user may not be able to clearly see the oil level information on the compressor. Therefore, in this embodiment, the supplementary light 700 is in a small-area high-brightness illumination mode, and the supplementary light 700 is always aligned with the oil level scale on the compressor, so that the user can accurately and promptly observe the oil level information.

[0062] Furthermore, when the supplementary light is close to the compressor, the oil level mark can be clearly seen even at low brightness. This also expands the illumination range of the supplementary light, which is beneficial for users to observe the operation of other components of the testing equipment. In other words, the supplementary light 700 in this embodiment can automatically switch supplementary lighting modes according to the distance of the monitoring camera 600 to adapt to the corresponding operating conditions.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laboratory cryogenic test monitoring device, characterized by, The utility model relates to a kind of monitoring camera support frame, including: Two longitudinal beams, two The longitudinal beam is parallel with each other and is distributed left and right symmetrically; Mobile crossbar, the mobile crossbar is perpendicular to longitudinal beam, two ends of the mobile crossbar are slidably connected with two longitudinal beams respectively; Support frame, the support frame is movably arranged on mobile crossbar, and the top side of the support frame is equipped with monitoring camera and light supplement lamp; First drive assembly, it is arranged between two longitudinal beams, and the first drive assembly is used to drive the mobile crossbar along longitudinal direction sliding; Second drive assembly, it is arranged on mobile crossbar, and the second drive assembly is used to drive support frame along transverse direction sliding; Wherein, when the support frame moves from one end of the mobile crossbar to the other end, the support frame can rotate 180 °, so that monitoring camera and light supplement lamp are all towards the side away from the center of mobile crossbar; The top surface of the mobile crossbar is symmetrically provided with a guard plate on the front and back sides, and a through hole is formed at the diagonal position of the two guard plates. A storage part is provided on the back surface of the two guard plates and at the through hole. A rack is movably arranged in the storage part. A driven gear is arranged on the bottom of the support frame. When the support frame passes through any one of the racks, the support frame can rotate 180 °. The inner end of the rack is provided with a guide column, the guide column movably penetrates the storage part, the outer part of the guide column is sleeved with a return spring, and the two ends of the return spring are connected with the inner wall of the storage part and the rack respectively. When the return spring is not affected by external force, the rack is retracted into the storage part. The diagonal sides between the two longitudinal beams are each provided with a blocking part, and the two blocking parts are one-to-one corresponding to the two guide columns. When the mobile crossbar moves to the side close to one of the blocking parts, the blocking part abuts against the corresponding guide column, and the corresponding rack protrudes outside the through hole, so that the rack can engage with the driven gear when the support frame passes through.

2. A laboratory cryogenic test monitoring apparatus as claimed in claim 1, wherein: The support frame includes an outer protective tube and a lifting tube, the lifting tube is movably nested in the inner part of the outer protective tube, the top side of the lifting tube is provided with a connecting seat, the connecting seat is provided with a mounting frame, and the monitoring camera and the light supplement lamp are arranged on the mounting frame.

3. A laboratory cryogenic test monitoring device according to either of claims 1 or 2, characterised in that: Two connecting ribs are arranged between the two longitudinal beams, and the two connecting ribs are distributed in front and back. The first drive assembly includes a drive motor and a drive screw. The drive motor is arranged on one of the connecting ribs. One end of the drive screw is coaxially connected with the output shaft of the drive motor. The drive screw is also threadedly connected with the mobile crossbar.

4. A laboratory cryogenic test monitoring device according to any one of claims 1 or 2, characterized in that: The mobile crossbar is a hollow square tube structure. The second drive assembly is located inside the mobile crossbar. The movable end of the second drive assembly is provided with a stand. The top wall of the mobile crossbar is provided with a strip-shaped opening for the stand to pass through. The bottom of the support frame is rotationally connected with the stand.

5. A laboratory cryogenic test monitoring apparatus as claimed in claim 1, wherein: The light supplement lamp includes a lampshade and a bulb. The bulb is slidably connected with the lampshade along the axial direction of the lampshade. The inner part of the lampshade is further provided with a lamp holder. The bulb is arranged on the lamp holder. The lamp holder is provided with an iron ring. The inner end of the lampshade is provided with an electromagnet. The electromagnet and the iron ring are oppositely arranged.

6. A laboratory cryogenic test monitoring apparatus as claimed in claim 5, wherein: The upper front and back sides of the mobile crossbar are each provided with a conductive strip. The mobile crossbar is further provided with a power supply. The positive and negative electrodes of the power supply are connected with the two conductive strips through wires. The two lead wires of the electromagnet are connected with conductive columns, and the two conductive columns are arranged on the bottom of the support frame.

7. A laboratory cryogenic test monitoring apparatus as claimed in claim 6, wherein: The lampshade is internally provided with a plurality of light rods distributed along the axial direction of the lampshade, the light rods are in sliding fit with the lamp holder, and the outer part of the light rods is provided with a pushing spring, and in the natural state, the pushing spring is in the compressed state.

8. A laboratory cryogenic test monitoring apparatus as claimed in claim 2, wherein: The top surface of the connecting seat is further provided with a rotating seat, and the mounting frame is fixedly arranged on the rotating seat.

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