Ventilation type aging test box

Abstract

The utility model provides a ventilation type aging test box, which comprises a test box and is characterized in that the inner wall of the test box is rotatably connected with a bidirectional screw rod, the bidirectional screw rod is in threaded fit with two symmetrically arranged driving plates, and the opposite sides of the two driving plates are respectively provided with a clamping mechanism; a driving motor is arranged outside the test box, a sleeve is fixed at the output end of the driving motor, a U-shaped frame is fixed at the bottom of the test box, a rotating shaft is rotatably connected to the top of the test box, and fan blades are fixed at the upper end of the rotating shaft. By arranging linkage type two-way lead screw drive, when a knob is rotated to adjust the distance between clamping mechanisms, extrusion plates on the two sides of a sample can synchronously apply balanced pressure, meanwhile, clamping plates assist in supporting from the outer side, a stable fixing mode of center extrusion and outer side surrounding is formed, through arrangement of a transmission mechanism, when fan blades rotate, the clamping mechanisms can be driven to rotate, and the clamping efficiency is improved. Circulating airflow is in uniform contact with the surface of the sample, so that the consistency and reliability of aging test results are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of aging test chamber technology, specifically an air-exchange aging test chamber. Background Technology

[0002] As an important piece of equipment in the field of materials science and engineering, aging test chambers are widely used to simulate environmental conditions such as high temperature, high humidity, and light exposure to evaluate the durability and reliability of materials or products. In recent years, air-exchange aging test chambers have gradually become a research hotspot. By introducing a gas circulation system, they can achieve dynamic adjustment of the gas composition in the test environment, significantly improving the authenticity and efficiency of aging tests.

[0003] Utility Model Patent Application No. CN202222679640.2 discloses a ventilation-type aging test chamber, including a chamber body. The lower two side walls of the chamber body are provided with heat dissipation holes. A hinge rod is provided at the front end of the chamber body, and a door panel is provided at the front end of the chamber body. The door panel is hinged to the chamber body via the hinge rod. An observation window is provided inside the door panel. A controller is provided at the front end of the chamber body. An experimental chamber is provided inside the chamber body, and a placement plate is provided inside the experimental chamber and fixedly connected to the two side walls inside the experimental chamber. A heating plate is provided on the right side wall of the experimental chamber. A partition is provided at the right end of the chamber body, and a heating device is provided at the upper end of the partition. The heating device is electrically connected to the heating plate. An air pump is provided at the lower end of the partition.

[0004] The aforementioned patent uses a motor to drive the fan blades, which allows high-temperature gas to test the test material. However, the fixed sample holder design has obvious defects. It not only makes it difficult to ensure that the sample is in full-range and uniform contact with the circulating airflow, but also forms eddies or dead zones in some areas due to the fixed relative position of the airflow and the sample surface. This results in uneven airflow distribution on the sample surface and affects the consistency of the aging results. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide an air-exchange aging test chamber to solve the problems mentioned in the background. This invention features a novel structure. By setting up a linkage-type bidirectional screw drive, when the distance between the clamping mechanisms is adjusted by rotating the knob, the pressing plates on both sides of the sample can apply balanced pressure simultaneously. At the same time, the clamping plates provide auxiliary support from the outside, forming a stable fixing method of central compression and outer encirclement. Through the setting of the transmission mechanism, the clamping mechanism can be driven to rotate when the fan blades rotate, so that the circulating airflow can make uniform contact with the sample surface, improving the consistency of aging results.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an air-exchange aging test chamber, including a test box, characterized in that: a bidirectional lead screw is rotatably connected to the inner wall of the test box, and two symmetrically arranged drive plates are threaded onto the bidirectional lead screw, and clamping mechanisms are provided on the opposite sides of the two drive plates;

[0007] The test box is equipped with a drive motor on the outside, with a fixed sleeve at its output end. A U-shaped frame is fixed at the bottom of the test box, and a rotating shaft is rotatably connected to its top. A fan blade is fixed at the upper end of the rotating shaft.

[0008] The test box is equipped with a transmission mechanism inside, and a mounting groove is provided on one side of the inner wall of the test box. A circulation mechanism is provided inside the mounting groove.

[0009] Furthermore, the clamping mechanism includes an arc-shaped frame rotatably connected to the drive plate; a slide rod slidably passing through the arc-shaped frame; a mounting block fixedly connected to the slide rod; a rotating groove rod fixedly connected to one side of the arc-shaped frame; one end of the slide rod is fixedly connected to a pressing plate, and the outer end is inserted into the groove of the rotating groove rod; a spring sleeved on the slide rod, with its two ends abutting against the mounting block and the arc-shaped frame respectively; connecting arms hinged to both ends of the arc-shaped frame, with their free ends rotatably connected to clamping plates; connecting rods hinged to both ends of the mounting block, with the opposite end of the connecting rod hinged to the connecting arm; and a sleeve slidingly engaging with one side of the rotating groove rod.

[0010] Furthermore, the transmission mechanism includes a drive sprocket fixed to the sleeve, a driven shaft rotatably mounted on the U-shaped frame, a driven sprocket and a drive bevel gear fixed to both ends of the driven shaft, and a driven bevel gear fixed to the lower end of the rotating shaft and meshing with the drive bevel gear; the drive sprocket and the driven sprocket are connected by a chain, and the chain tension is adjustable.

[0011] Furthermore, the circulation mechanism includes an air pump disposed in the mounting slot, a connecting pipe connected to the air pump, a U-shaped pipe connected to one end of the connecting pipe, a heating component disposed in the mounting slot, and a circulation pipe with its two ends respectively connected to the test box and the mounting slot.

[0012] Furthermore, a limiting rod is fixed to the top of the test box, and the two drive plates are slidably sleeved on the limiting rod; one end of the bidirectional lead screw extends out of the test box and is fixed to a knob.

[0013] Furthermore, the heating component is a resistance heater, located on the air inlet path of the U-shaped tube.

[0014] Furthermore, the outlet direction of the circulation pipe is perpendicular to the airflow direction generated by the fan blades.

[0015] The beneficial effects of this utility model are:

[0016] 1. This invention utilizes a linkage-driven bidirectional lead screw, allowing for simultaneous adjustment of the distance between the two clamping mechanisms by rotating a knob. The sample is subjected to balanced pressure from the central compression plate, while the outer clamping plates adaptively provide auxiliary support under the action of the linkage mechanism, forming a composite clamping structure of "central compression + outer encirclement," ensuring the stable fixation of samples of different shapes. The drive motor rotates the entire clamping mechanism through a transmission mechanism, ensuring that the sample surface is uniformly exposed to the circulating airflow from all directions, significantly improving the consistency and reliability of aging test results.

[0017] 2. This invention utilizes a drive motor to rotate the sample while simultaneously driving a bottom impeller via a sprocket-bevel gear transmission mechanism, generating a vertically upward airflow. The circulation mechanism (vacuum pump, heating element, circulation pipe) creates a horizontal circulating airflow. The vertical and horizontal airflows converge perpendicularly, forming a three-dimensional circulation system that completely eliminates the dead zones common in traditional single-duct designs. This system significantly improves the ventilation efficiency and gas mixing uniformity within the test chamber, ensuring a highly uniform temperature field and thus simulating the aging environment more realistically and efficiently. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an air-exchange aging test chamber according to the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of a ventilation-type aging test chamber according to the present invention.

[0020] Figure 3 This is a schematic diagram of the transmission mechanism of a ventilation-type aging test chamber according to the present invention.

[0021] Figure 4 This is a schematic diagram of the clamping mechanism connection structure of a ventilation-type aging test chamber according to the present invention.

[0022] Figure 5 This is a schematic diagram of the semi-circular limiting rod connection structure of an air-exchange aging test chamber according to the present invention.

[0023] Figure 6 This is a schematic diagram of the clamping mechanism of a ventilation-type aging test chamber according to the present invention.

[0024] In the diagram: 1. Test box; 2. Bidirectional lead screw; 3. Drive plate; 4. Clamping mechanism; 41. Arc frame; 42. Connecting arm; 43. Clamping plate; 44. Slide rod; 45. Mounting block; 46. Extrusion plate; 47. Spring; 48. Rotating groove rod; 49. Connecting rod; 5. Drive motor; 6. Sleeve; 7. U-shaped frame; 8. Rotating shaft; 9. Fan blade; 10. Transmission mechanism; 101. Drive sprocket; 102. Driven shaft; 103. Driven sprocket; 104. Driven bevel gear; 105. Driven bevel gear; 11. Mounting slot; 12. Circulation mechanism; 121. Air pump; 122. Connecting pipe; 123. U-shaped pipe; 124. Heating component; 125. Circulation pipe; 13. Limiting rod; 14. Knob. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] Please refer to Figures 1 to 6 This utility model provides a technical solution: a ventilation-type aging test chamber, including a test box 1. A bidirectional lead screw 2 is rotatably connected to the inner wall of the test box 1. Two symmetrically arranged drive plates 3 are threaded onto the bidirectional lead screw 2, and clamping mechanisms 4 are provided on opposite sides of the two drive plates 3. A drive motor 5 is provided on the outside of the test box 1, with a sleeve 6 fixed at its output end. A U-shaped frame 7 is fixed at the bottom of the test box 1, and a rotating shaft 8 is rotatably connected to its top. A fan blade 9 is fixed at the upper end of the rotating shaft 8. A transmission mechanism 10 is provided inside the test box 1. An installation groove 11 is opened on one side of the inner wall of the test box 1, and a circulation mechanism 12 is provided inside the installation groove 11. A limit rod 13 is fixed at the top of the test box 1, and the two drive plates 3 are slidably sleeved on the limit rod 13. One end of the bidirectional lead screw 2 extends out of the test box 1 and is fixed with a knob 14. By rotating the knob 14, the bidirectional lead screw 2 is driven to rotate, causing the two drive plates 3 to move towards or away from each other along the limit rod 13. After adjusting to a suitable distance, the clamping mechanism 4 is used to fix the sample, and the sealing door is closed to form a sealed test environment. The bidirectional lead screw 2 and the limiting rod 13 work together to ensure the smooth movement of the drive plate 3, realize the rapid positioning and clamping of the sample, adapt to different size testing requirements, and improve the versatility of the equipment.

[0027] In this embodiment, the clamping mechanism 4 includes an arc-shaped frame 41 rotatably connected to the drive plate 3; a slide rod 44 that slides through the arc-shaped frame 41; a mounting block 45 fixedly connected to the slide rod 44; a rotating groove rod 48 fixedly connected to one side of the arc-shaped frame 41; a pressing plate 46 fixedly connected to one end of the slide rod 44; and an outer end inserted into the groove of the rotating groove rod 48; a spring 47 sleeved on the slide rod 44, with its two ends abutting against the mounting block 45 and the arc-shaped frame 41 respectively; a connecting arm 42 hinged to both ends of the arc-shaped frame 41, with its free end rotatably connected to a clamping plate 43; connecting rods 49 hinged to both ends of the mounting block 45, with the opposite end of the connecting rod 49 hinged to the connecting arm 42; and a sleeve 6 slidingly engaged with the rotating groove rod 48 on one side. The sample is placed between the two clamping mechanisms 4. Rotating the knob 14 drives the bidirectional lead screw 2 to rotate, causing the two drive plates 3 to move towards each other along the limiting rod 13 until the two sides of the sample contact the extrusion plate 46. Continue rotating the knob 14. When the extrusion plate 46 contacts the sample, the slide rod 44 slides relative to the arc frame 41 and compresses the spring 47. The mounting block 45 moves synchronously and pushes the connecting arm 42 to rotate through the connecting rod 49, causing the clamping plate 43 to move towards the outside of the sample, forming a composite fixing structure of central extrusion plus external auxiliary support. The clamping plate 43 and the extrusion plate 46 work together to adapt to the fixing needs of samples of different shapes, increase the contact area, and prevent the sample from shaking in the high-temperature airflow.

[0028] In this embodiment, the transmission mechanism 10 includes a drive sprocket 101 fixed to the sleeve 6, a driven shaft 102 rotatably mounted on the U-shaped frame 7, driven sprockets 103 and a drive bevel gear 104 fixed to both ends of the driven shaft 102, and a driven bevel gear 105 fixed to the lower end of the rotating shaft 8 and meshing with the drive bevel gear 104; the drive sprocket 101 and the driven sprocket 103 are connected by a chain, and the chain tension is adjustable. The circulation mechanism 12 includes a vacuum pump 121 located in the mounting groove 11, a connecting pipe 122 connected to the vacuum pump 121, a U-shaped pipe 123 connected to one end of the connecting pipe 122, a heating component 124 located in the mounting groove 11, and a circulation pipe 125 whose two ends are respectively connected to the test box 1 and the mounting groove 11. The heating component 124 is a resistance heater and is located on the air inlet path of the U-shaped pipe 123. The outlet direction of the circulation pipe 125 is perpendicular to the airflow direction generated by the fan blade 9. The drive motor 5 synchronously drives the rotating groove rod 48 and the transmission mechanism 10 through the sleeve 6. The rotating groove rod 48 drives the arc frame 41 to rotate accordingly. The clamping mechanism 4 set on the other side rotates with the material and rotates on the drive plate 3 on the other side. The transmission mechanism 10 drives the fan blade 9 to generate a vertical upward airflow, which works together with the horizontal airflow formed by the circulation mechanism 12 to enhance the gas exchange on the sample surface.

[0029] When using the device, the sample is placed between the two extrusion plates 46. Rotating the knob 14 drives the bidirectional lead screw 2 to move the two drive plates 3 towards each other. The extrusion plates 46 contact the sample, causing the mounting block 45 to move with the slide rod 44. The connecting rod 49 pushes the clamping plate 43 for external auxiliary support. After the drive motor 5 starts, the sleeve 6 drives the left rotating groove rod 48 to rotate, driving the sample to rotate through friction. The right rotating groove rod 48 follows to support the sample, ensuring stable rotation. The sleeve 6 synchronously drives the drive sprocket 101, which drives the fan blade 9 to generate a vertical airflow through the chain and bevel gear pair. The air pump 121 extracts the gas from the chamber, heats it through the heating component 124, and returns it through the circulation pipe 125, forming a three-dimensional circulating airflow. This facilitates the testing of the sample and achieves uniform aging of the sample in a controllable high-temperature airflow, improving testing accuracy and efficiency.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A ventilation-type aging test chamber, comprising a test chamber (1), characterized in that: The inner wall of the test box (1) is rotatably connected to a bidirectional lead screw (2), and the bidirectional lead screw (2) has two symmetrically arranged drive plates (3) threadedly engaged. Clamping mechanisms (4) are provided on the opposite sides of the two drive plates (3). The test box (1) is equipped with a drive motor (5) on the outside, with a fixed sleeve (6) at its output end. The bottom of the test box (1) is fixed with a U-shaped frame (7), and the top of the frame is rotatably connected to a rotating shaft (8). The upper end of the rotating shaft (8) is fixed with a fan blade (9). The test box (1) is equipped with a transmission mechanism (10) inside, and a mounting groove (11) is provided on one side of the inner wall of the test box (1). A circulation mechanism (12) is provided inside the mounting groove (11).

2. The air-exchange aging test chamber according to claim 1, characterized in that: The clamping mechanism (4) includes an arc-shaped frame (41) rotatably connected to the drive plate (3); a slide rod (44) slidably passing through the arc-shaped frame (41); a mounting block (45) fixedly connected to the slide rod (44); a rotating groove rod (48) fixedly connected to one side of the arc-shaped frame (41); a pressing plate (46) fixedly connected to one end of the slide rod (44); an outer end inserted into the groove of the rotating groove rod (48); a spring (47) sleeved on the slide rod (44); two ends abutting against the mounting block (45) and the arc-shaped frame (41) respectively; a connecting arm (42) hinged to both ends of the arc-shaped frame (41); a clamping plate (43) rotatably connected to the free end of the connecting arm (42); a connecting rod (49) hinged to both ends of the mounting block (45); the opposite end of the connecting rod (49) hinged to the connecting arm (42); and a sleeve (6) slidingly engaged with the rotating groove rod (48) on one side.

3. The air-exchange aging test chamber according to claim 1, characterized in that: The transmission mechanism (10) includes a drive sprocket (101) fixed to the sleeve (6), a driven shaft (102) rotatably mounted on the U-shaped frame (7), a driven sprocket (103) and a drive bevel gear (104) fixed to both ends of the driven shaft (102), and a driven bevel gear (105) fixed to the lower end of the rotating shaft (8) and meshing with the drive bevel gear (104); the drive sprocket (101) and the driven sprocket (103) are connected by a chain, and the chain tension is adjustable.

4. The air-exchange aging test chamber according to claim 1, characterized in that: The circulation mechanism (12) includes a vacuum pump (121) located in the mounting slot (11), a connecting pipe (122) connected to the vacuum pump (121), a U-shaped pipe (123) connected to one end of the connecting pipe (122), a heating component (124) located in the mounting slot (11), and a circulation pipe (125) whose two ends are respectively connected to the test box (1) and the mounting slot (11).

5. The air-exchange aging test chamber according to claim 1, characterized in that: The test box (1) is fixed with a limiting rod (13) at the top, and the two drive plates (3) are slidably sleeved on the limiting rod (13); one end of the bidirectional screw (2) extends out of the test box (1) and is fixed with a knob (14).

6. The air-exchange aging test chamber according to claim 4, characterized in that: The heating component (124) is a resistance heater and is located on the air inlet path of the U-shaped tube (123).

7. The air-exchange aging test chamber according to claim 4, characterized in that: The outlet direction of the circulation pipe (125) is perpendicular to the airflow direction generated by the fan blade (9).

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