Double-support type temperature field switching mechanism

Abstract

The utility model discloses a double-support type temperature field switching mechanism, which comprises a first support plate and a second support plate which are sequentially and fixedly arranged on a bedplate of a test device along the transverse direction, a first connecting rod is arranged on the first support plate, a second connecting rod is arranged on the second support plate, and a tray is arranged between the first connecting rod and the second connecting rod. The number of mechanical parts is greatly reduced, and the structure is simple. Besides, when the position of the tray is switched, only the end parts of the first connecting rod and the second connecting rod are close to the first constant-temperature port and the second constant-temperature port, so that the first connecting rod and the second connecting rod can be prevented from being corroded by water vapor emitted by the first constant-temperature port and the second constant-temperature port, and the failure rate of mechanical parts can be greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of temperature sensor detection technology, and in particular to a dual-support temperature field switching mechanism. Background Technology

[0002] Temperature sensors are key components of heat meters, and durability tests are required to assess their reliability. The current national standard GB / T 32224-2020 "Heat Meters" requires temperature sensors to undergo 4000 cycles of high and low temperature durability testing. The test requires the temperature sensor to be placed in both high and low temperature baths for 30 seconds each, with a switching time between baths not exceeding 4 seconds.

[0003] The current testing setup uses two constant-temperature baths, one with a lower temperature and the other with a higher temperature. Each bath has a temperature-controlled opening on its top platform, creating two distinct temperature fields. Above the platform are two vertical and two longitudinal sliding stages, each equipped with a track, lead screw, and motor. The temperature sensor to be calibrated is placed on a tray. When switching the temperature field of the sensor, the tray moves upwards along the vertical guide rail from one temperature opening, then moves along the longitudinal track above the other temperature opening, and finally descends along the track to the other temperature opening, thus switching positions between the two openings. This structure requires two motors and matching guide rails that pass above the temperature openings. Multiple position switches are also installed on the rails to detect the tray's position. In this environment, where the constant-temperature bath primarily contains water, corrosion of the guide rails can easily lead to problems such as sluggish movement, poor contact of the position switches, or even malfunction. The numerous mechanical and electronic components also increase the failure rate. Patent CN216559435U discloses a portable flow meter temperature sensor durability testing device, including a bracket and a constant temperature bath located below the bracket. A positioning slide rail is provided on the bracket, and a sliding plate is slidably connected to the positioning slide rail. A vertical cylinder is mounted on the sliding plate, and a temperature sensor is mounted on the cylinder rod head of the vertical cylinder. A horizontal cylinder is also mounted on the bracket, with its cylinder seat fixed to the bracket. The cylinder rod of the horizontal cylinder is connected to the sliding plate, driving the sliding plate to move left and right along the positioning slide rail. Its structure is complex, with many components, and requires an air source, thus resulting in a higher probability of failure.

[0004] Patent CN214843344U discloses a sensor durability testing device, which uses a transfer component in the top frame to move the sensor within the testing chamber to experience different temperature settings. However, this device also suffers from a complex structure, requires a corresponding hydraulic station and hydraulic equipment, has a high failure rate, and is costly. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a dual-support temperature field switching mechanism to solve the problems of complex structure, easy corrosion and high failure rate of current temperature sensor durability testing devices.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A dual-support temperature field switching mechanism includes a first support plate and a second support plate fixedly mounted transversely on a test device platform. A first connecting rod is provided on the first support plate, and a second connecting rod is provided on the second support plate. A tray is provided between the first and second connecting rods. The two ends of the first connecting rod are a first end and a second end, respectively, and the two ends of the second connecting rod are a third end and a fourth end, respectively. The first end is rotatably connected to the first support plate, the second end is rotatably connected to one side of the tray, the third end is rotatably connected to the other side of the tray, and the fourth end is rotatably connected to the second support plate. The first, second, third, and fourth ends, when projected onto the same longitudinal vertical plane and connected sequentially, form a parallelogram.

[0008] Furthermore, a reinforcing member is provided between the first link and the second link, and the first link and the second link are rotatably connected to the side corresponding to the reinforcing member.

[0009] Furthermore, the reinforcing component is a horizontally arranged Z-shaped anti-rotation rod, one end of which is rotatably connected to the first connecting rod, and the other end of which is rotatably connected to the second connecting rod.

[0010] Furthermore, a motor for driving the first link to swing is fixedly installed on the first support plate, and / or a motor for driving the second link to swing is fixedly installed on the second support plate.

[0011] The positive effects of this utility model are:

[0012] This invention uses the swinging motion of the first and second connecting rods to switch the tray between the first and second constant temperature ports, significantly reducing the number of mechanical parts and simplifying the structure. Furthermore, during tray position switching, since only the ends of the first and second connecting rods are close to the first and second constant temperature ports, corrosion from water vapor emitted by these ports is avoided, greatly reducing the failure rate of mechanical parts. Because the tray is moved only by the staggered first and second connecting rods on both sides, interference between the first and second connecting rods prevents the tray from failing to move to the first and second constant temperature ports. Compared to the traditional XY-axis motion requiring three starts and stops (i.e., the temperature sensor needs to rise vertically from one constant temperature port, then move horizontally above another constant temperature port, then descend vertically to that port), switching the temperature sensor between the two temperature baths is converted to a circular motion requiring only one start and stop, reducing the number of starts and stops, making control easier, and reducing equipment wear. Because only one motor is used, eliminating the need for guide rails and lead screws, costs are saved. This not only reduces costs but also minimizes component wear and corrosion, lowering the probability of malfunctions. When the first and second links swing, they drive the tray to move stably, ensuring the temperature sensor placed on the tray remains horizontal during temperature field switching, avoiding the problem of tangled temperature sensor wiring. The control principle of this invention is simple; the tray moves in an arc, and the movement of the tray and the temperature sensor placed on it can be precisely controlled simply by controlling the swing arm to make an arc-shaped movement via the motor. Furthermore, this invention involves fewer start-stop actions, reducing equipment wear. Attached Figure Description

[0013] Figure 1 These are perspective views of Examples 1 and 2;

[0014] Figure 2 These are side views of the tray when it is located at the first constant temperature port in Examples 1 and 2;

[0015] Figure 3 These are side views of the tray after it has been lifted in Examples 1 and 2;

[0016] Figure 4 These are side views of the tray when it is located at the second constant temperature port in Examples 1 and 2;

[0017] In the picture:

[0018] 1. Platform; 2. First thermostatic inlet; 3. First support plate; 4. Motor; 5. First end; 6. First connecting rod; 7. Anti-rotation rod; 8. Tray; 9. Second end; 10. Third end; 11. Second connecting rod; 12. Second thermostatic inlet; 13. Second support plate; 14. Fourth end. Detailed Implementation

[0019] For ease of description, in the following description, the direction that is consistent with the line connecting the center of the first constant temperature port 2 and the center of the second constant temperature port 12 is "longitudinal", and the direction that is perpendicular to the line connecting the center of the first constant temperature port 2 and the center of the second constant temperature port 12 in the horizontal plane is "transverse".

[0020] Example 1

[0021] like Figure 1 As shown, the rectangular platform 1 of the durability testing device is provided with a first constant temperature port 2 and a second constant temperature port 12 in sequence along the longitudinal direction from left to right. The temperatures of the first constant temperature port 2 and the second constant temperature port 12 are different.

[0022] A dual-support temperature field switching mechanism is disposed on a platform 1 and located between a first constant temperature port 2 and a second constant temperature port 12. The temperature field switching mechanism includes a first support plate 3 and a second support plate 13 fixedly disposed on the platform 1 from back to front in a transverse direction. The first support plate 3 and the second support plate 13 are both rectangular and parallel to each other. A first connecting rod 6 is provided on the first support plate 3, and a second connecting rod 11 is provided on the second support plate 13. The first connecting rod 6 and the second connecting rod 11 are of equal length, parallel to each other, and staggered longitudinally.

[0023] A tray 8 is provided between the first connecting rod 6 and the second connecting rod 11. The tray 8 is rectangular, with a rectangular groove on its top for placing the temperature sensor to be calibrated, and through holes evenly distributed at the bottom of the groove. The two ends of the first connecting rod 6 are the first end 5 and the second end 9, respectively, and the two ends of the second connecting rod 11 are the third end 10 and the fourth end 14, respectively. The first end 5 is hinged to the inner side of the first support plate 3, the second end 9 is hinged to the rear side of the tray 8, the third end 10 is hinged to the front side of the tray 8, and the fourth end 14 is hinged to the inner side of the second support plate 13. The first end 5, the second end 9, the third end 10, and the fourth end 14 are projected onto the same longitudinal vertical plane and connected sequentially to form a parallelogram.

[0024] A motor 4 is fixedly mounted on the first support plate 3, and the output shaft of the motor 4 is fixedly connected to the first end 5. It is used to drive the first connecting rod 6 to swing.

[0025] Combination Figures 2 to 4As shown, when motor 4 runs, it drives the first connecting rod 6 to swing, thereby moving the tray 8 from the first constant temperature port 2 to the second constant temperature port 12, realizing the switching of the temperature sensor placed on the tray 8 between the first constant temperature port 2 and the second constant temperature port 12. In actual use, only two position switches need to be set on the inner side of the first support plate 3 to detect the position of the first connecting rod 6 when the tray 8 is located at the first constant temperature port 2 and the second constant temperature port 12, which can reduce the number of position switches used. Moreover, the position switches are far away from the first constant temperature port 2 and the second constant temperature port 12 to avoid corrosion from the water vapor emitted by the first constant temperature port 2 and the second constant temperature port 12, thereby reducing the failure rate of electrical components. If motor 4 is a stepper motor or an electric angler with angular position feedback, the position switches can be removed, which can further reduce the failure rate of electrical components.

[0026] Because only the swinging motion of the first link 6 and the second link 11 drives the tray 8 to switch between the first thermostatic port 2 and the second thermostatic port 12, the number of mechanical parts is greatly reduced, resulting in a simpler structure. Furthermore, when the tray 8 switches positions, only the ends of the first link 6 and the second link 11 are close to the first thermostatic port 2 and the second thermostatic port 12, preventing corrosion from water vapor emitted from these ports and thus significantly reducing the failure rate of the mechanical parts.

[0027] Since the first constant temperature port 2 and the second constant temperature port 12 are lower than the installation positions of the first connecting rod 6 and the second connecting rod 11, if two connecting rods are respectively set on both sides of the tray 8 to form a parallelogram four-bar linkage, when the tray 8 moves downwards towards the first constant temperature port 2 or the second constant temperature port 12, the two connecting rods located on the same side of the tray 8 will inevitably interfere with each other, thus preventing the tray 8 from moving further downwards. In this embodiment, the first connecting rod 6 and the second connecting rod 11 are respectively set on both sides of the tray 8, and the first connecting rod 6 and the second connecting rod 11 are staggered longitudinally, which perfectly solves this problem.

[0028] Example 2

[0029] The difference between this embodiment and Embodiment 1 is that:

[0030] A reinforcing component is provided between the first link 6 and the second link 11. The reinforcing component is a horizontally arranged Z-shaped anti-rotation rod 7. One end of the anti-rotation rod 7 is hinged to the first link 6, and the other end is hinged to the second link 11.

[0031] Because the first link 6 and the second link 11 are staggered longitudinally, the movement of the tray 9 is a translational motion to avoid tangling of the temperature sensor wires. However, this generates torque on the first link 6 and the second link 11, which tends to twist the first link 6 and the second link 11 like a twisting drill. The anti-rotation rod 7 is installed to withstand some of the torque, preventing the first link 6 and the second link 11 from deforming due to the torque.

[0032] The above-described embodiments are detailed and specific, illustrating preferred embodiments of the present utility model. They are only used to illustrate the technical ideas and features of the present utility model, with the aim of enabling those skilled in the art to understand the content of the present utility model and implement it accordingly. However, they are not limited to the present utility model, and the patent scope of the present utility model cannot be limited by this embodiment alone. That is, any equivalent changes or modifications made to the spirit disclosed in the present utility model, without departing from the structure of the present utility model, such as local improvements within the system and modifications or transformations between subsystems, are still within the patent scope of the present utility model.

Claims

1. A dual-support temperature field switching mechanism, characterized in that, The apparatus includes a first support plate (3) and a second support plate (13) fixedly mounted on the test platform (1) in a transverse direction. The first support plate (3) is provided with a first connecting rod (6), and the second support plate (13) is provided with a second connecting rod (11). A tray (8) is provided between the first connecting rod (6) and the second connecting rod (11). The two ends of the first connecting rod (6) are a first end (5) and a second end (9), respectively. The two ends of the second connecting rod (11) are a third end (10) and a fourth end (14), respectively. The first end (5) is rotatably connected to the first support plate (3), the second end (9) is rotatably connected to one side of the tray (8), the third end (10) is rotatably connected to the other side of the tray (8), and the fourth end (14) is rotatably connected to the second support plate (13). The first end (5), the second end (9), the third end (10), and the fourth end (14) are projected into the same longitudinal vertical plane and connected in sequence to form a parallelogram.

2. The dual-support temperature field switching mechanism according to claim 1, characterized in that, A reinforcing member is provided between the first link (6) and the second link (11), and the first link (6) and the second link (11) are rotatably connected to the side corresponding to the reinforcing member.

3. The dual-support temperature field switching mechanism according to claim 2, characterized in that, The reinforcing component is a horizontally arranged Z-shaped anti-rotation rod (7), one end of which is rotatably connected to the first connecting rod (6), and the other end is rotatably connected to the second connecting rod (11).

4. The dual-support temperature field switching mechanism according to claim 1, characterized in that, A motor (4) for driving the first link (6) to swing is fixedly installed on the first support plate (3), and / or a motor (4) for driving the second link (11) to swing is fixedly installed on the second support plate (13).

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