A low pressure test chamber

Abstract

This utility model provides a low-pressure test chamber, comprising: a low-pressure test chamber body; a guide rod fixedly connected to the left side inside the low-pressure test chamber body; a sample rack installed in the center of the guide rod; a guide hole through the center of the left side of the sample rack, fitting the guide rod; the guide rod installed in the guide hole; a mounting groove on the right side of the sample rack; an internal height adjustment device installed in the mounting groove; a rotating rod installed on the right side of the sample rack; the top end of the rotating rod rotatably connected to the top of the inner wall of the low-pressure test chamber body; and an external height adjustment device installed at the bottom end of the rotating rod. This low-pressure test chamber, by incorporating the internal and external height adjustment devices, can quickly adjust the height of the sample rack and allows for external adjustment of the sample rack height.

Description

Technical Field

[0001] This utility model belongs to the field of low-pressure testing technology, and more specifically, relates to a low-pressure testing chamber. Background Technology

[0002] Low-pressure test chambers are mainly used in aviation, aerospace, information, and electronics fields to determine the environmental adaptability and reliability of instruments, electrical products, materials, components, and equipment under single or simultaneous low-pressure, high-temperature, and low-temperature conditions, and to measure electrical performance parameters of the test specimens by energizing them simultaneously. Existing low-pressure test chambers consist of a chamber body and a vacuum system. The chamber body contains a vacuum chamber with several sample racks evenly spaced inside. The objects to be tested are placed on the sample racks. When placing larger test objects, the sample racks need to be removed, possibly more than one rack, to accommodate the size of the test object. This inevitably increases the operation time and makes the operation cumbersome.

[0003] To address the aforementioned issue of existing low-pressure test chambers' inconvenience in adjusting the distance between adjacent sample racks according to the size of the tested object, extensive searching revealed a low-pressure test chamber with patent publication number CN221638166U. This chamber includes a housing with a vacuum chamber. A sample rack is installed within the vacuum chamber, and an adjustment mechanism and a locking mechanism are mounted on the sample rack. The adjustment mechanism includes a vertical plate fixed inside the vacuum chamber, a sliding groove on the vertical plate, a sliding rod fixedly installed inside the groove, and a slider movably installed outside the sliding rod. A U-shaped... The present invention facilitates the up-and-down movement of the sample holder through the cooperation between the slider and the slide rod. Furthermore, the cooperation between the inner rod, the slide plate, and the spring allows two positioning blocks to be inserted into two corresponding positioning slots, thereby fixing the sample holder after movement. This facilitates adjusting the distance between adjacent sample holders according to the size of the test object. However, the technical solution provided by this patent does not allow for external adjustment of the sample holder height. This means that the sample holder height can only be adjusted before the experiment, and cannot be adjusted during low-pressure tests, making it inconvenient to observe the test specimen from different angles.

[0004] This invention enables rapid adjustment of the sample rack height and allows for adjustment of the sample rack height from outside the low-pressure test chamber. Utility Model Content

[0005] The present invention aims to solve the technical problems mentioned in the background art and provide a low-pressure test chamber that achieves the effect of quickly adjusting the height of the sample rack and being able to adjust the height of the sample rack from outside the low-pressure test chamber.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-pressure test chamber, comprising: a low-pressure test chamber body, wherein a guide rod is fixedly connected to the left side of the interior of the low-pressure test chamber body, a sample rack is installed in the center of the guide rod, a guide hole that fits the guide rod is opened through the center of the left side of the sample rack, the guide rod is installed in the guide hole, an installation groove is opened on the right side of the sample rack, an internal height adjustment device is installed in the installation groove, a rotating rod is installed on the right side of the sample rack, the top end of the rotating rod is rotatably connected to the top end of the inner wall of the low-pressure test chamber body, and an external height adjustment device is installed at the bottom end of the rotating rod;

[0007] The internal height adjustment device includes: a handle, a rod, a spring, a locking block, a rotating block, and a limiting ball; a rotating block is sleeved on the outer side of the center of the rotating rod, a locking block is installed at the front end of the rotating block, a rod is fixedly connected to the front end of the center of the locking block, a handle is rotatably connected to the front end of the rod, several springs are also connected to the front end of the locking block, the front end of the springs is fixedly connected to the front end of the inner wall of the mounting groove, a spiral groove is opened on the outer side of the rotating rod, and a limiting ball that fits the spiral groove is fixedly connected to the center of the rotating block.

[0008] A further preferred embodiment: the pull handle consists of a pull plate, a round rod, and a connecting rod; the front end of the pull rod is rotatably connected to the connecting rod, the outer side of the connecting rod is fitted with a round rod, the front end of the round rod is fixedly connected to the pull plate, and the center of the connecting rod is located 5 mm behind the center of the round rod.

[0009] A further preferred embodiment: the outer side of the rotating block is provided with several locking teeth, and the front end of the locking block is provided with several locking grooves that engage with the locking teeth of the rotating block.

[0010] A further preferred embodiment: the external height adjustment device includes: a driven tooth, a driving tooth, a drive rod, and a handle; the driven tooth is fixedly connected to the bottom end of the handle, the driving tooth is engaged at the front end of the bottom end of the driven tooth, the drive rod is fixedly connected to the front end of the driving tooth, and a handle is installed at the front end of the drive rod.

[0011] A further preferred embodiment: a plurality of first limiting blocks are sleeved on the outer side of the drive rod, and the bottom end of the first limiting blocks is fixedly connected to the body of the low-pressure test chamber.

[0012] A further preferred embodiment: between the drive rod and the handle, there are also: a driven rotor, a partition, an active rotor, an active magnetic pole, and a driven magnetic pole. The driven rotor is fixedly connected to the front end of the drive rod. A partition is sleeved in the center of the driven rotor. The low-pressure test chamber body is fixedly connected to the outer end of the partition. An active rotor is sleeved in the center of the partition. A handle is fixedly connected to the front end of the active rotor. Several active magnetic poles are installed inside the rear end of the active rotor. Several driven magnetic poles that match the active magnetic poles are installed inside the front end of the driven rotor.

[0013] A further preferred embodiment: a second limiting block is sleeved in the center of the active rotor, and a partition is fixedly connected to the rear end of the second limiting block.

[0014] A further preferred embodiment: a protective top cover is installed on the top of the external height adjustment device.

[0015] A further preferred embodiment: a limiting ring is fixedly connected to the bottom end of the rotating rod, and the limiting ring is installed on the top shell of the protective top plate.

[0016] A further preferred embodiment: the number of teeth of the driven tooth is twice the number of teeth of the driving tooth.

[0017] Beneficial effects:

[0018] 1. The internal height adjustment device allows for quick adjustment of the sample holder height. In use, pull the handle to move the lever forward, which in turn moves the locking block forward, separating it from the rotating block, allowing the rotating block to rotate freely. Then, move the sample holder up and down to adjust its position. After adjustment, pull the handle back to move the lever backward, causing the locking block to move forward and lock the rotating block, preventing it from rotating. The limiting ball is then locked in the spiral groove, preventing the sample holder from moving up and down, thus completing the adjustment of the sample holder position.

[0019] 2. By incorporating an external height adjustment device, the height of the sample rack can be adjusted from outside the low-pressure test chamber. Rotating the handle drives the active rotor, which, under the mutual attraction of the active and driven magnetic poles, drives the driven rotor to rotate. This, in turn, drives the drive rod to rotate, which in turn drives the active gear to rotate, thus driving the driven gear to rotate. The rotating rod then rotates, and the helical groove and limiting ball limit the movement of the limiting ball upwards. This, in turn, moves the sample rack via the rotating block, adjusting its height and allowing staff to observe the experimental samples from different angles.

[0020] 3. In summary, these low-pressure test chambers, by incorporating internal and external height adjustment devices, can quickly adjust the height of the sample rack and allow for external adjustment of the sample rack height from outside the low-pressure test chamber. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the overall internal structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the external height adjustment device of this utility model.

[0024] Figure 4 This is a cross-sectional structural diagram of part of the external height adjustment device of this utility model.

[0025] Figure 5 This is a schematic diagram of the internal height adjustment device of this utility model.

[0026] Figure 6 This is a cross-sectional view of the sample holder of this utility model.

[0027] Figure 7 For the present utility model Figure 6 Enlarged structural diagram at point A in the middle.

[0028] Figure 8 This is a schematic diagram of the pull handle structure of this utility model.

[0029] Figure 1-8 Components: 1. Low-pressure test chamber body; 2. External height adjustment device; 3. Observation door; 4. Sample rack; 5. Guide rod; 6. Limiting ring; 7. Internal height adjustment device; 8. Rotating rod; 201. Driven gear; 202. Active gear; 203. First limiting block; 204. Drive rod; 205. Driven rotor; 206. Partition plate; 207. Second limiting block; 208. Active rotor; 209. Rotating handle; 210. Active magnetic pole; 211. Driven magnetic pole; 401. Guide hole; 402. Mounting slot; 701. Pull handle; 702. Pull rod; 703. Spring; 704. Locking block; 705. Rotating block; 706. Limiting ball; 7011. Pull plate; 7012. Round rod; 7013. Connecting rod. Detailed Implementation

[0030] The following will refer to the appendix in the embodiments of this utility model. Figures 1-8 The technical solutions in the embodiments of this utility model will be clearly and completely described.

[0031] Please see Figure 1-8 In this embodiment of the utility model, a low-pressure test chamber includes: a low-pressure test chamber body 1, a guide rod 5 fixedly connected to the left side inside the low-pressure test chamber body 1, a sample rack 4 installed in the center of the guide rod 5, a guide hole 401 that fits the guide rod 5 through the center of the left side of the sample rack 4, the guide rod 5 installed in the guide hole 401, an installation groove 402 opened on the right side of the sample rack 4, an inner height adjustment device 7 installed in the installation groove 402, a rotating rod 8 installed on the right side of the sample rack 4, the top end of the rotating rod 8 being rotatably connected to the top end of the inner wall of the low-pressure test chamber body 1, and an outer height adjustment device 2 installed at the bottom end of the rotating rod 8;

[0032] The internal height adjustment device includes: a handle 701, a rod 702, a spring 703, a locking block 704, a rotating block 705, and a limiting ball 706; a rotating block 705 is sleeved on the outer side of the center of the rotating rod 8, a locking block 704 is installed at the front end of the rotating block 705, a rod 702 is fixedly connected to the front end of the center of the locking block 704, a handle 701 is rotatably connected to the front end of the rod 702, and several springs 703 are also connected to the front end of the locking block 704. The front ends of the springs 703 are fixedly connected to the front end of the inner wall of the mounting groove 402. A spiral groove is opened on the outer side of the rotating rod 8, and a limiting ball 706 that fits the spiral groove is fixedly connected to the center of the rotating block 705.

[0033] To achieve rapid height adjustment of the sample holder 4, pull the handle 701 to move the lever 702 forward, which in turn moves the locking block 704 forward. The locking block 704 separates from the rotating block 705, allowing the rotating block 705 to rotate freely. Then, move the sample holder 4 up and down to adjust its position. After adjustment, pull the handle 701 back to move the lever 702 backward, which in turn moves the locking block 704 forward to lock the rotating block 705, preventing it from rotating. The limiting ball 706 is then locked in the spiral groove, preventing the sample holder 4 from moving up and down, thus completing the adjustment of the sample holder 4's position.

[0034] In this embodiment of the utility model, the pull handle 701 is composed of a pull plate 7011, a round rod 7012, and a connecting rod 7013. The front end of the pull rod 702 is rotatably connected to the connecting rod 7013, and the round rod 7012 is sleeved on the outside of the connecting rod 7013. The front end of the round rod 7012 is fixedly connected to the pull plate 7011. The center of the connecting rod 7013 is located 5 mm behind the center of the round rod 7012, so that rotating the pull handle 701 can pull the pull rod 702. Pulling the pull plate 7011 to rotate causes the round rod 7012 to rotate. At this time, the round rod 7012 is close to the front end of the sample holder 4 and only rotates, while the connecting rod 7013 rotates around the center of the round rod 7012. Because the center of the connecting rod 7013 and the center of the round rod 7012 are located at different positions, the pull rod 702 will be displaced.

[0035] In this embodiment of the utility model, the outer side of the rotating block 705 is provided with a plurality of locking teeth, and the front end of the locking block 704 is provided with a plurality of locking grooves that fit with the locking teeth of the rotating block 705, so as to better restrict the displacement of the rotating block 705.

[0036] In this embodiment of the present invention, the external height adjustment device 2 includes: a driven tooth 201, a driving tooth 202, a drive rod 204, and a handle 209; the driven tooth 201 is fixedly connected to the bottom end of the handle 8, the driving tooth 202 is engaged at the front end of the bottom end of the driven tooth 201, the drive rod 204 is fixedly connected to the front end of the driving tooth 202, and the handle 209 is installed at the front end of the drive rod 204.

[0037] To achieve the effect of adjusting the height of the sample holder 4 from outside the low-pressure test chamber, in use, rotating the handle 209 drives the drive rod 204 to rotate, which in turn drives the active gear 202 to rotate, thereby driving the driven gear 201 to rotate, causing the rotating rod 8 to rotate. Under the limitation of the spiral groove and the limiting ball 706, the limiting ball 706 moves upward, thereby driving the sample holder 4 to move through the rotating block 705, thus adjusting the height of the sample holder 4.

[0038] In this embodiment of the utility model, a plurality of first limiting blocks 203 are sleeved on the outer side of the drive rod 204, and the bottom end of the first limiting block 203 is fixedly connected to the low pressure test chamber body 1, so as to provide support for the drive rod 204.

[0039] In this embodiment of the utility model, the following components are also installed between the drive rod 204 and the handle 209: a driven rotor 205, a partition 206, an active rotor 208, an active magnetic pole 210, and a driven magnetic pole 211. The driven rotor 205 is fixedly connected to the front end of the drive rod 204. The partition 206 is sleeved in the center of the driven rotor 205. The low-pressure test chamber body 1 is fixedly connected to the outer end of the partition 206. The active rotor 208 is sleeved in the center of the partition 206. The handle 209 is fixedly connected to the front end of the active rotor 208. Several active magnetic poles 210 are installed inside the rear end of the active rotor 208. Several driven magnetic poles 211 that match the active magnetic poles 210 are installed inside the front end of the driven rotor 205. To achieve the effect of ensuring the airtightness of the device while driving the drive rod 204 to rotate, the handle 209 is rotated, which drives the active rotor 208 to rotate. Under the mutual attraction of the active magnetic pole 210 and the driven magnetic pole 211, the driven rotor 205 will rotate, thereby driving the drive rod 204 to rotate. In addition, the arrangement of the active magnetic pole 210 and the driven magnetic pole 211 is existing technology, which enables the driven rotor 205 to rotate when the active rotor 208 rotates. This method can separate the driven rotor 205 and the active rotor 208 through the partition 206, without the need for the driven rotor 205 and the active rotor 208 to be connected together, thereby ensuring the airtightness of the device.

[0040] In this embodiment of the utility model, a second limiting block 207 is sleeved in the center of the active rotor 208, and a partition 206 is fixedly connected to the rear end of the second limiting block 207 to provide support for the active rotor 208 and prevent the active rotor 208 from moving out of the device.

[0041] In this embodiment of the utility model, a protective top shell is installed on the top of the external height adjustment device 2 to protect the internal parts of the external height adjustment device 2.

[0042] In this embodiment of the invention, a limiting ring 6 is fixedly connected to the bottom end of the rotating rod 8, and the limiting ring 6 is installed on the top shell of the protective top plate. This achieves the effect of providing support for the rotating rod 8.

[0043] In this embodiment of the present invention, the number of teeth of the driven tooth 201 is twice the number of teeth of the driving tooth 202, so as to facilitate the rotation of the driven tooth 201. The driving tooth 202 has fewer teeth, so it can drive the driven tooth 201 to rotate with less force and can control the rotation of the driven tooth 201 more precisely.

[0044] Working principle: In use, pulling the handle 701 moves the lever 702 forward, which in turn moves the locking block 704 forward, separating the locking block 704 from the rotating block 705, allowing the rotating block 705 to rotate freely. Then, the sample holder 4 is moved up and down to adjust its position. After adjustment, the handle 701 is pulled back, causing the lever 702 to move backward, which in turn moves the locking block 704 forward to lock the rotating block 705, preventing it from rotating. The limiting ball 706 is then locked in the spiral groove, preventing the sample holder 4 from moving up and down, thus completing the adjustment of the sample holder 4's position. (Note: The last sentence appears to be a separate, unrelated instruction and is not translated.) When adjusting the height of the sample holder 4, rotating the handle 209 causes the active rotor 208 to rotate. Under the mutual attraction of the active magnetic pole 210 and the driven magnetic pole 211, the driven rotor 205 rotates, which in turn drives the drive rod 204 to rotate. This drives the active gear 202 to rotate, which in turn drives the driven gear 201 to rotate, causing the rotating rod 8 to rotate. Under the limitation of the spiral groove and the limiting ball 706, the limiting ball 706 moves upward, thereby driving the sample holder 4 to move through the rotating block 705. This adjusts the height of the sample holder 4, making it easier for staff to observe the experimental sample from different angles.

Claims

1. A low-pressure test chamber, comprising: The low pressure test chamber body (1) is characterized in that: a guide rod (5) is fixedly connected to the left side inside the low pressure test chamber body (1), a sample rack (4) is installed in the center of the guide rod (5), a guide hole (401) that fits the guide rod (5) is opened through the center of the left side of the sample rack (4), the guide rod (5) is installed in the guide hole (401), an installation groove (402) is opened on the right side of the sample rack (4), an inner height adjustment device (7) is installed in the installation groove (402), a rotating rod (8) is installed on the right side of the sample rack (4), the top end of the rotating rod (8) is rotatably connected to the top end of the inner wall of the low pressure test chamber body (1), and an outer height adjustment device (2) is installed at the bottom end of the rotating rod (8). The internal height adjustment device includes: a handle (701), a rod (702), a spring (703), a locking block (704), a rotating block (705), and a limiting ball (706); a rotating block (705) is sleeved on the outer side of the center of the rotating rod (8), a locking block (704) is installed at the front end of the rotating block (705), a rod (702) is fixedly connected to the front end of the center of the locking block (704), a handle (701) is rotatably connected to the front end of the rod (702), and several springs (703) are also connected to the front end of the locking block (704). The front end of the springs (703) is fixedly connected to the front end of the inner wall of the mounting groove (402). A spiral groove is opened on the outer side of the rotating rod (8), and a limiting ball (706) that fits the spiral groove is fixedly connected to the center of the rotating block (705).

2. The low-pressure test chamber according to claim 1, characterized in that: The pull handle (701) is composed of a pull plate (7011), a round rod (7012) and a connecting rod (7013); the front end of the pull rod (702) is rotatably connected to the connecting rod (7013), the outer side of the connecting rod (7013) is fitted with the round rod (7012), the front end of the round rod (7012) is fixedly connected to the pull plate (7011), and the center of the connecting rod (7013) is located 5 mm behind the center of the round rod (7012).

3. A low-pressure test chamber according to claim 1, characterized in that: The rotating block (705) has several locking teeth on its outer side, and the front end of the locking block (704) has several locking grooves that fit with the locking teeth of the rotating block (705).

4. A low-pressure test chamber according to claim 1, characterized in that: The external height adjustment device (2) includes: a driven tooth (201), a driving tooth (202), a drive rod (204), and a handle (209); the driven tooth (201) is fixedly connected to the bottom end of the handle (8), the driving tooth (202) is engaged at the front end of the bottom end of the driven tooth (201), the drive rod (204) is fixedly connected to the front end of the driving tooth (202), and the handle (209) is installed at the front end of the drive rod (204).

5. A low-pressure test chamber according to claim 4, characterized in that: The drive rod (204) is fitted with several first limiting blocks (203) on its outer side, and the bottom end of the first limiting block (203) is fixedly connected to the body of the low pressure test chamber (1).

6. A low-pressure test chamber according to claim 4, characterized in that: Between the drive rod (204) and the handle (209), there are also the following components: driven rotor (205), partition plate (206), active rotor (208), active magnetic pole (210), and driven magnetic pole (211). The driven rotor (205) is fixedly connected to the front end of the drive rod (204). The partition plate (206) is sleeved in the center of the driven rotor (205). The low pressure test chamber body (1) is fixedly connected to the outer end of the partition plate (206). The active rotor (208) is sleeved in the center of the partition plate (206). The handle (209) is fixedly connected to the front end of the active rotor (208). Several active magnetic poles (210) are installed inside the rear end of the active rotor (208). Several driven magnetic poles (211) that match the active magnetic poles (210) are installed inside the front end of the driven rotor (205).

7. A low-pressure test chamber according to claim 6, characterized in that: The active rotor (208) is fitted with a second limiting block (207) in the center, and a partition plate (206) is fixedly connected to the rear end of the second limiting block (207).

8. A low-pressure test chamber according to claim 4, characterized in that: The top of the external height adjustment device (2) is equipped with a protective top shell.

9. A low-pressure test chamber according to claim 8, characterized in that: The bottom end of the rotating rod (8) is fixedly connected to a limiting ring (6), which is installed on the top shell of the protective top plate.

10. A low-pressure test chamber according to claim 4, characterized in that: The number of teeth of the driven tooth (201) is twice the number of teeth of the driving tooth (202).

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