Laboratory low-temperature test monitoring device

Abstract

The invention relates to the technical field of monitoring equipment, in particular to a laboratory low-temperature test monitoring device which comprises two longitudinal beams which are parallel to each other and are distributed in a bilateral symmetry mode. The movable transverse frame is perpendicular to the longitudinal beams, and the two ends of the movable transverse frame are in sliding fit with the two longitudinal beams respectively; through the arrangement of the longitudinal beam and the movable transverse frame and through the two driving assemblies, the monitoring cameras can be controlled to circularly move along the square-shaped path, so that the multiple compressors located on the two sides are monitored, and compared with a traditional mode of manual visual inspection or monitoring through multiple sets of cameras, on the premise that the cost is low, the monitoring efficiency is improved, and the working efficiency is improved. And meanwhile, the oil level monitoring requirements of a plurality of compressors are met.

Description

Technical Field

[0001] The present invention relates to the technical field of monitoring equipment, in particular to a laboratory low-temperature testing monitoring device. Background Art

[0002] In the field of compressor performance testing, monitoring operating parameters under low-temperature conditions is a key step in evaluating equipment reliability. The compressor's oil level is directly related to its lubrication effectiveness, operational stability, and service life. Therefore, continuous and accurate oil level monitoring is essential during low-temperature testing.

[0003] Currently, low-temperature operating tests for compressors are usually conducted in dedicated low-temperature laboratories, with the experimental environment temperature strictly controlled between -45°C and -50°C to simulate the equipment's operating status under extreme low-temperature conditions. However, the existing oil level monitoring method has significant flaws, requiring staff to enter the laboratory and directly observe the compressor's oil level scale with the naked eye. Because the temperature in the laboratory is extremely low, far exceeding the human tolerance range, the staff's stay time is strictly limited to a few minutes each time, making it impossible to track and record oil level changes in real time. This operating mode not only makes it difficult to capture dynamic fluctuations in the oil level, but may also cause abnormal oil level conditions to be missed due to long observation intervals, affecting the integrity and accuracy of the test data. At the same time, frequent entry and exit of low-temperature environments also poses a potential threat to the health of staff.

[0004] In order to solve the above problems, the industry has tried to use video equipment instead of manual observation. However, in actual applications, it is found that multiple compressors of different models or batches are usually tested in parallel in low-temperature laboratories at the same time, and the number of compressors tested at one time can reach dozens. If a camera and a corresponding image transmission and storage module are separately configured for each compressor, the equipment procurement cost, installation and commissioning cost, and subsequent maintenance cost will increase significantly. In summary, in the existing technology, whether it is manual visual observation or multi-camera monitoring solutions, it is impossible to achieve real-time, efficient and stable monitoring of the oil levels of multiple compressors in a low-temperature laboratory while meeting low-cost requirements. To this end, we propose a laboratory low-temperature test monitoring device to effectively solve the above-mentioned drawbacks. Summary of the Invention

[0005] The object of the present invention is to provide a laboratory low-temperature test monitoring device for solving the problems raised in the above background technology.

[0006] The present invention is achieved through the following technical solutions: A laboratory low-temperature test monitoring device, comprising:

[0007] Two longitudinal beams, the two longitudinal beams are parallel to each other and are symmetrically distributed;

[0008] A movable horizontal frame, wherein the movable horizontal frame is perpendicular to the longitudinal beams, and both ends of the movable horizontal frame are respectively slidably engaged with the two longitudinal beams;

[0009] A support frame, the support frame is movably arranged on the movable horizontal frame, and a monitoring camera and a fill light are provided on one side of the top of the support frame;

[0010] A first driving assembly is provided between the two longitudinal beams, and is used to drive the movable cross frame to slide longitudinally;

[0011] A second driving assembly is provided on the movable horizontal frame, and the second driving assembly is used to drive the support frame to slide in the horizontal direction;

[0012] When the support frame moves from one end of the movable horizontal frame to the other end, the support frame can rotate 180 degrees so that the monitoring camera and the fill light are both directed to the side away from the center of the movable horizontal frame.

[0013] Optionally, the support frame includes an outer protective tube and a lifting tube, the lifting tube is movably nested inside the outer protective tube, a connecting seat is provided on one side of the top of the lifting tube, a mounting frame is provided on the connecting seat, and the surveillance camera and fill light are both arranged on the mounting frame.

[0014] Optionally, two connecting ribs are provided between the two longitudinal beams, and the two connecting ribs are distributed front to back; the first driving assembly includes a driving motor and a driving screw, the driving motor is arranged 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 threaded with the movable cross frame.

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

[0016] Optionally, guard plates are symmetrically provided on the front and rear sides of the top face of the movable horizontal frame, through openings are provided at the diagonal positions of the two guard plates, and storage parts are provided on the back sides of the two guard plates at the through openings, and racks are movably provided in the storage parts; a driven gear is provided at the bottom of the support frame, and when the support frame passes through any of the racks, the support frame can rotate 180°.

[0017] Optionally, a guide post is provided at the inner end of the rack, the guide post movably passes through the storage portion, a return spring is sleeved on the outer portion of the guide post, and the two ends of the return spring are respectively connected to the inner wall of the storage portion and the rack, and when the return spring is not affected by external force of the system, the rack is retracted into the storage portion;

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

[0019] Optionally, the fill light includes a lampshade and a bulb, the bulb slidingly cooperates with the lampshade along its axial direction, a lamp holder is also provided inside the lampshade, the bulb is provided on the lamp holder, an iron ring is provided on the lamp holder, an electromagnet is provided at the inner end of the lampshade, and the electromagnet and the iron ring are relatively distributed.

[0020] Optionally, conductive strips are provided on both the front and rear sides of the upper portion of the movable horizontal frame, and a power supply is also provided on the movable horizontal frame, and the positive and negative poles of the power supply are connected to the two conductive strips via wires;

[0021] The two leads of the electromagnet are both connected with conductive posts, which are arranged 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 respectively abut against the two conductive strips.

[0022] Optionally, the lampshade is further provided with a plurality of optical rods distributed along its own axis, the optical rods are slidably matched with the lamp holder, and the outer sleeve of the optical rods is provided with a push spring, and in a natural state, the push spring is in a compressed state.

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

[0024] Compared with the prior art, the present invention provides a laboratory low temperature test monitoring device with the following features:

[0025] Beneficial effects:

[0026] 1. The present invention utilizes longitudinal beams and a movable horizontal frame, along with two drive assemblies, to control the circular movement of a surveillance camera along a U-shaped path, thereby monitoring multiple compressors located on both sides. Compared to traditional manual observation or monitoring using multiple cameras, the present invention can simultaneously meet the oil level monitoring needs of multiple compressors at a lower cost.

[0027] 2. The present invention has two diagonally staggered racks, and when the movable crossbar is located on one side of the longitudinal beam, only one rack is extended. Therefore, when the support frame moves from one end of the movable crossbar to the other, the surveillance camera can automatically complete the steering;

[0028] 3. The light supplement lamp in the present application has adjustable illumination range, specifically, when the monitoring camera moves from one side far away from the monitored compressor to the other side, the illumination range of the light supplement lamp is small and the brightness is high, when the monitoring camera is located at the position close to the compressor, the illumination range of the light supplement lamp is large and the brightness is relatively weak, thereby meeting the light supplement demand at different positions, so that the staff can more timely and accurately observe the oil level of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present application;

[0030] Figure 2 It is a longitudinal beam and a moving cross frame schematic diagram of the present application;

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

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

[0033] Figure 5 It is Figure 2 the corresponding enlarged view at A in the figure;

[0034] Figure 6 It is Figure 3 the corresponding enlarged view at B in the figure;

[0035] Figure 7 It is Figure 4 the corresponding enlarged view at C in the figure;

[0036] Figure 8 It is a monitoring camera patrol path diagram of the present application.

[0037] In the figure: 100, longitudinal beam; 101, connecting rib; 102, slide rail; 103, slide base; 104, blocking part; 200, moving cross frame; 201, strip-shaped opening; 202, protective plate; 203, storage part; 204, rack; 205, guide column; 206, reset spring; 207, conductive strip; 208, power supply; 300, first driving assembly; 301, driving motor; 302, driving screw; 400, support frame; 401, outer protective tube; 402, lifting tube; 403, connecting seat; 404, mounting frame; 405, rotating seat; 406, driven gear; 500, second driving assembly; 501, stand column; 600, monitoring camera; 700, light supplement lamp; 701, lampshade; 702, bulb; 703, lamp holder; 704, electromagnet; 705, iron ring; 706, light pole; 707, pushing spring; 708, conductive column. DETAILED DESCRIPTION

[0038] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] Currently, when testing multiple compressors under low-temperature conditions in a cryogenic laboratory, to save space and facilitate manual inspections, the compressors are typically arranged in a matrix configuration. This means the compressors are divided into several rows, with each row containing several compressors. Traditionally, this involves manually inspecting the compressor oil level within the laboratory. However, due to the low temperature inside the laboratory, workers cannot remain there for extended periods, making it difficult to monitor oil level changes in real time.

[0040] In addition, if remote observation is performed using a camera, although workers can be prevented from entering the laboratory, each compressor needs to be equipped with an independent camera, which greatly increases the testing cost. In order to solve the above problem, the present invention proposes the following technical solutions:

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

[0042] like Figure 1 and Figure 2 As shown, a movable cross frame 200 is provided between the two longitudinal beams 100. The movable cross frame 200 is perpendicular to the longitudinal beams 100, and the two ends of the movable cross frame 200 slide 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, and a slide seat 103 is provided on the slide rail 102 for sliding. The slide seat 103 is bolted and fixed to the bottom surface of the movable cross frame 200 to enhance the stability of the movable cross frame 200 when sliding back and forth.

[0043] This embodiment further includes a first driving assembly 300, which is disposed between the two longitudinal beams 100 and is used to drive the movable cross frame 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 aligned with the length of the slide rail 102. The drive screw 302 also engages with the movable horizontal frame 200 in a threaded manner. It should be noted that the bottom wall of the movable horizontal frame 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 horizontal frame 200 to slide forward and backward.

[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 horizontal frame 200. A surveillance camera 600 and a fill light 700 are mounted on one side of the top of the support frame 400. The second drive assembly 500 is mounted on the movable horizontal frame 200 and is used to drive the support frame 400 to slide laterally. Specifically, the movable horizontal frame 200 is a hollow square tubular structure. The second drive assembly 500 is located within the movable horizontal frame 200. A column 501 is mounted on the movable end of the second drive assembly 500. The top wall of the movable horizontal frame 200 has a strip-shaped opening 201 through which the column 501 passes. 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 horizontal frame 200 to the other, the support frame 400 can rotate 180 degrees so that the surveillance camera 600 and the fill light 700 are both facing away from the center of the movable horizontal frame 200. In other words, when the support frame 400 is located at either end of the movable horizontal frame 200, the surveillance camera 600 and the fill light 700 are both facing away from the center of the movable horizontal frame 200.

[0046] In summary, in actual use of this embodiment, both longitudinal beams 100 are positioned between two rows of monitored compressors, and the length of each longitudinal beam 100 is comparable to the length of a single row of monitored compressors. In actual monitoring, to enable the camera to sequentially monitor multiple compressors, the support frame 400 must carry the camera along a U-shaped path along the two longitudinal beams 100 and the two connecting ribs 101.

[0047] Specifically, in the initial state, the movable horizontal frame 200 is located on one side of the longitudinal beam 100, and the support frame 400 is located at one end of the movable horizontal frame 200, and the monitoring camera 600 and the fill light 700 are both directed at one of the compressors; then, the first drive component 300 controls the movable horizontal frame 200 to slide a certain distance longitudinally, so that the monitoring camera 600 is aimed at the next compressor; when the movable horizontal frame 200 moves from one side of the longitudinal beam 100 to the other side, the second drive component 500 drives the support frame 400 to move horizontally, and in this process, the support frame 400 automatically rotates half a circle, so that the monitoring camera 600 is aimed at the compressor on the other side, and this cycle causes the support frame 400 to reciprocate along the hole-shaped path, thereby monitoring the oil levels of multiple compressors in turn.

[0048] On the other hand, this embodiment also includes a terminal monitoring device, which includes a host and a display screen, wherein the host is used to receive the shooting images of the monitoring camera 600 and feed the images back to the display screen to facilitate user observation.

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

[0050] The support frame 400 includes an outer protective tube 401 and an elevating tube 402. The elevating tube 402 is movably nested within the outer protective tube 401. A connecting seat 403 is provided on one side of the top of the elevating tube 402. A mounting bracket 404 is mounted on the connecting seat 403. The surveillance camera 600 and the fill light 700 are both mounted on the mounting bracket 404. The sidewalls of the outer protective tube 401 are also provided with fixing bolts. When the fixing bolts are tightened until their inner ends abut against the elevating tube 402, the height of the elevating tube 402 is fixed.

[0051] The following describes how the support frame 400 realizes automatic rotation:

[0052] Guard plates 202 are symmetrically provided on the front and rear sides of the top face of the movable horizontal frame 200, and through openings are opened at the diagonal positions of the two guard plates 202. Storage parts 203 are provided on the back sides of the two guard plates 202 and at the through openings, and a rack 204 is movably provided in the storage part 203; the outer protective tube 401 is rotatably sleeved on the outside of the column 501 through a damping bearing, and a driven gear 406 is fixedly sleeved on the bottom of the outer protective tube 401. When the support frame 400 passes through any of the racks 204, the support frame 400 can rotate 180°. A guide post 205 is provided at the inner end of the rack 204, and the guide post 205 is movable through the storage portion 203. A return spring 206 is provided on the outer sleeve of the guide post 205, and the two ends of the return spring 206 are respectively connected to the inner wall of the storage portion 203 and the rack 204. When the return spring 206 is not affected by external forces of the system, the rack 204 is retracted into the storage portion 203; that is, when the rack 204 is not affected by external forces of the system, the rack 204 cannot form an engagement with the driven gear 406. Only when the rack 204 extends outward and the support frame 400 passes through the rack 204, can engagement occur.

[0053] Furthermore, blocking portions 104 are provided on both diagonal sides between the two longitudinal beams 100, and the two blocking portions 104 correspond one-to-one to the two guide columns 205 respectively. Specifically in this embodiment, the blocking portions 104 are fixedly arranged on the connecting rib 101; when the movable cross frame 200 moves to a side close to one of the blocking portions 104, the blocking portion 104 abuts against the corresponding guide column 205, and the corresponding rack 204 extends out of the outside of the through-opening, so that when the support frame 400 passes by, the rack 204 can engage with the driven gear 406.

[0054] Therefore, in actual application of this embodiment, in the initial state, the movable cross frame 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 cross frame 200. In this case, the monitoring camera 600 is used to monitor the compressor located at the corresponding position on the left side. When the movable cross frame 200 moves backward under the control of the first drive assembly 300, the monitoring camera 600 can sequentially monitor the compressors located on the left side. When the movable cross frame 200 moves to the rearmost position, the rack 204 on the left side extends outward under the push of the blocking portion 104. At this time, the support frame 400 further translates to the right, and the support frame 400 can rotate half a circle under the action of the rack 204.

[0055] Since the distance between two rows of compressors is typically several meters, the length of the movable horizontal frame 200 is also comparable to the distance between the two rows of compressors. If the monitoring camera 600 cannot immediately rotate its orientation during the movement of the support frame 400 from one end of the movable horizontal frame 200 to the other, the user's waiting time will inevitably increase during long-distance transfer, and the user will not be able to immediately obtain oil level information from the compressors on the other side. In this embodiment, the two racks 204 are diagonally staggered, which enables the support frame 400 to rotate its orientation immediately during horizontal movement, thereby facilitating immediate response to oil level abnormalities.

[0056] Example 3: Please refer to Figure 1 - Figure 8 The present application also provides a laboratory low-temperature test monitoring device. The difference between this embodiment and the second embodiment is that:

[0057] The fill light 700 includes a lampshade 701 and a bulb 702. The bulb 702 slides along the axial direction of the lampshade 701. A lamp holder 703 is located inside the lampshade 701. The bulb 702 is mounted on the lamp holder 703. The lamp holder 703 is equipped with an iron ring 705. An electromagnet 704 is located at the inner end of the lampshade 701. The electromagnet 704 and the iron ring 705 are arranged relative to each other. Specifically, the lampshade 701 also has several optical rods 706 arranged along its axial direction. The optical rods 706 slide along the lamp holder 703. The outer sleeves of the optical rods 706 are equipped with push springs 707. In their natural state, the push springs 707 are compressed. When the electromagnet 704 is de-energized, the bulb 702 is positioned away from the electromagnet 704. Conversely, when the electromagnet 704 is energized, the magnetic force overcomes the push springs 707, causing the bulb 702 to move 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 close to the electromagnet 704, it is equivalent to the bulb 702 entering a deeper position in the lampshade 701, so the light emitted by the fill light 700 is also more concentrated, that is, the illumination range of the fill light 700 will become smaller, but the intensity will increase.

[0059] Furthermore, conductive bars 207 are provided on both the front and rear sides of the upper portion of the movable horizontal frame 200. A power supply 208 is also provided on the movable horizontal frame 200, with the positive and negative poles of the power supply 208 connected to the two conductive bars 207 via wires. In this embodiment, the two conductive bars 207 are located on the facing surfaces of the two guard plates 202. The two leads of the electromagnet 704 are connected to conductive posts 708, which 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 uprights 501. When the support frame 400 passes between the two conductive bars 207, the two conductive posts 708 can respectively abut against the two conductive bars 207. In this embodiment, the conductive bars 207 and the conductive posts 708 are both made of copper, which has good electrical conductivity. When the two conductive posts 708 abut against the two conductive bars 207, the electromagnet 704 is energized; otherwise, the electromagnet 704 is always de-energized.

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

[0061] In summary, in actual use, when the support frame 400 moves from one end of the movable horizontal frame 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, thereby narrowing the illumination range and increasing the illumination brightness. This is because when the fill light 700 is far from the compressor, if the fill light 700 is in a wide-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 fill light 700 is set to a narrow-area, high-brightness illumination mode at this time, and the fill 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 fill light is closer to the compressor, the oil level indicator can be clearly seen even at a lower brightness. This also expands the fill light's illumination range, facilitating observation of the operating conditions of other components of the test equipment. In other words, the fill light 700 in this embodiment automatically switches fill light modes based on the distance from the surveillance camera 600 to accommodate the operating conditions.

[0063] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. The scope of the present application shall be limited only by the claims.

[0064] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to these embodiments. Rather, numerous modifications are possible without departing from the spirit and scope of the present application as delineated by the claims and their equivalents.

Claims

1. A laboratory low temperature test monitoring device, characterized in that: include: Two longitudinal beams, the two longitudinal beams are parallel to each other and are symmetrically distributed; A movable horizontal frame, wherein the movable horizontal frame is perpendicular to the longitudinal beams, and both ends of the movable horizontal frame are respectively slidably engaged with the two longitudinal beams; A support frame, the support frame is movably arranged on the movable horizontal frame, and a monitoring camera and a fill light are provided on one side of the top of the support frame; A first driving assembly is provided between the two longitudinal beams, and is used to drive the movable cross frame to slide longitudinally; A second driving assembly is provided on the movable horizontal frame, and the second driving assembly is used to drive the support frame to slide in the horizontal direction; When the support frame moves from one end of the movable horizontal frame to the other end, the support frame can rotate 180 degrees so that the monitoring camera and the fill light are both directed to the side away from the center of the movable horizontal frame.

2. A laboratory low temperature test monitoring device according to claim 1, characterized in that: The support frame includes an outer protective tube and a lifting tube. The lifting tube is movably nested inside the outer protective tube. A connecting seat is provided on one side of the top of the lifting tube. A mounting frame is provided on the connecting seat. The monitoring camera and the fill light are both arranged on the mounting frame.

3. A laboratory low temperature test monitoring device according to any one of claims 1 or 2, characterized in that: Two connecting ribs are provided between the two longitudinal beams, and the two connecting ribs are distributed front to back; the first driving assembly includes a driving motor and a driving screw, the driving motor is arranged 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 threaded with the movable cross frame.

4. A laboratory low temperature test monitoring device according to any one of claims 1 or 2, characterized in that: The movable horizontal frame is a square tube structure with a hollow interior. The second driving assembly is located inside the movable horizontal frame. A column is provided at the movable end of the second driving assembly. A strip opening is provided on the top wall of the movable horizontal frame for the column to pass through. The bottom of the support frame is rotatably connected to the column.

5. A laboratory low temperature test monitoring device according to claim 4, characterized in that: The top surface of the movable horizontal frame is symmetrically provided with guard plates on the front and rear sides, and the diagonal positions of the two guard plates are provided with through holes. The back sides of the two guard plates are provided with storage parts at the through holes, and a rack is movably provided in the storage part; the bottom of the support frame is provided with a driven gear, and when the support frame passes through any of the racks, the support frame can rotate 180°.

6. A laboratory low temperature test monitoring device according to claim 5, characterized in that: A guide post is provided at the inner end of the rack, and the guide post is movable through the storage portion. A return spring is sleeved on the outer portion of the guide post, and the two ends of the return spring are respectively connected to the inner wall of the storage portion and the rack. When the return spring is not affected by external force of the system, the rack is retracted into the storage portion. There are blocking parts on both diagonal sides between the two longitudinal beams, and the two blocking parts correspond to the two guide columns one by one. When the movable cross frame moves to the side close to one of the blocking parts, the blocking part abuts against the corresponding guide column, and the corresponding rack extends out of the through-hole so that when the support frame passes by, the rack can engage with the driven gear.

7. A laboratory low temperature test monitoring device according to any one of claims 1 or 5, characterized in that: The fill light includes a lampshade and a bulb. The bulb slides with the lampshade along its axial direction. A lamp holder is also provided inside the lampshade. The bulb is provided on the lamp holder. An iron ring is provided on the lamp holder. An electromagnet is provided at the inner end of the lampshade. The electromagnet and the iron ring are relatively distributed.

8. A laboratory low temperature test monitoring device according to claim 7, characterized in that: Conductive strips are provided on both the front and rear sides of the upper portion of the movable horizontal frame. A power supply is also provided on the movable horizontal frame. The positive and negative poles of the power supply are connected to the two conductive strips via wires. The two leads of the electromagnet are both connected with conductive posts, which are arranged 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 respectively abut against the two conductive strips.

9. A laboratory low temperature test monitoring device according to claim 8, characterized in that: The lampshade is further provided with a plurality of light rods distributed along its own axis, the light rods are slidably matched with the lamp holder, and the outer sleeve of the light rods is provided with a push spring, which is in a natural state and is in a compressed state.

10. A laboratory low temperature test monitoring device according to claim 2, characterized in that: The top surface of the connecting seat is further provided with a rotating seat, and the mounting bracket is fixedly arranged on the rotating seat.

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