Sealing structure of high-low-temperature damp-heat low-pressure test box

Abstract

The utility model relates to the technical field of test boxes, and particularly discloses a sealing structure of a high-low-temperature damp-heat low-pressure test box, which comprises a bottom plate and a test box body fixedly connected to the upper end of the bottom plate, a supporting plate is fixedly connected in the test box body, a vertical rod is fixedly connected to the upper end of the supporting plate, and a placing plate is fixedly connected to the upper end of the vertical rod. A movable cover is arranged above the bottom plate, and a rectangular sealing gasket abutting against the upper edge of the test box body is mounted at the lower end of the movable cover; the self-locking characteristic of the worm gear and double protection of the anti-contact cylinder are utilized, it is ensured that the movable cover keeps constant pressing force under the extreme working condition, and therefore the purposes of preventing the movable cover from being accidentally opened, improving sealing stability and preventing sealing failure are achieved, an electronic timer is arranged before a test, an audible and visual alarm is in linkage, and through precise time sequence control and an alarm feedback mechanism, the reliability of the test is improved. The purposes of avoiding timing errors, warning test termination in time and effectively guaranteeing test data accuracy and result reliability are achieved.

Description

Technical Field

[0001] This utility model relates to the field of test chamber technology, and specifically discloses a sealing structure for a high and low temperature humidity and low pressure test chamber. Background Technology

[0002] In numerous fields such as aerospace, electronics, and materials science, products need to operate stably in complex and ever-changing environments. Therefore, environmental adaptability testing, including high and low temperature, humidity and heat, and low pressure tests, is crucial. High and low temperature, humidity and heat, and low pressure test chambers are key equipment for simulating these complex environments, and their performance directly affects the accuracy and reliability of test results. The sealing structure is an important component of the test chamber; its function is to ensure an independent and stable environment inside the chamber, preventing external environmental interference with parameters such as temperature, humidity, and air pressure.

[0003] Existing test chambers primarily rely on sealed doors for sealing. These doors typically use magnetic sealing strips (such as rubber-based magnetic sealing strips), achieving a closed seal through the attraction between the magnetic strip and the metal frame of the chamber. However, this sealing method has significant drawbacks: under high-temperature environments, the magnetic strip is prone to magnetic attenuation, and when the attraction force weakens below a critical value, it directly causes seal failure. Furthermore, the door lacks any auxiliary fixing devices, relying solely on the magnetic strip's attraction to maintain the seal, making it susceptible to accidental opening under external force. This results in poor seal stability and an inability to meet the sealing requirements of complex environments.

[0004] Furthermore, existing test chambers generally do not integrate timing mechanisms, and test personnel can only rely on external devices such as clocks and mobile phones or manually record test time. This method is prone to problems such as misrecording of duration and interruption of timing. More importantly, there is no effective alarm mechanism to remind staff when the test reaches the preset time, and the test data loses traceability, which seriously affects the reliability and accuracy of test results.

[0005] Therefore, a sealed structure for a high and low temperature humidity and low pressure test chamber is needed to solve the above problems. Utility Model Content

[0006] This invention proposes a sealing structure for a high and low temperature humidity and low pressure test chamber, which prevents the movable cover from being accidentally opened, improves the stability of the seal, and prevents seal failure. At the same time, it avoids timing errors and alerts staff through an alarm, thereby preventing any impact on the accuracy and reliability of the test results.

[0007] This utility model is implemented as follows: a sealing structure for a high and low temperature humidity and low pressure test chamber includes a base plate and a test chamber body fixedly connected to the upper end of the base plate. A support plate is fixedly connected inside the test chamber body, a vertical rod is fixedly connected to the upper end of the support plate, and a placement plate is fixedly connected to the upper end of the vertical rod.

[0008] A movable cover is provided above the base plate, and a rectangular sealing gasket that abuts against the upper edge of the test chamber is installed at the lower end of the movable cover. An auxiliary sealing mechanism is provided at the rear of the test chamber.

[0009] The auxiliary sealing mechanism includes two connecting plates fixedly connected to the rear end of the test chamber. A rotating shaft is rotatably connected between the two connecting plates. A movable plate is fixedly connected between the outer wall of the rotating shaft and the movable cover. A drive box is fixedly connected to the outer wall of one of the connecting plates. A worm gear is rotatably connected inside the drive box. A worm wheel is meshed with the outer wall of the worm gear. A transmission shaft is fixedly connected between the worm wheel and the rotating shaft. A shaft penetrating the drive box is fixedly connected to the upper end of the worm gear. A disc is fixedly connected to the upper end of the shaft. An anti-contact cylinder located outside the disc is fixedly connected to the upper end of the drive box.

[0010] An electronic timer is installed at the upper end of the movable cover, and an audible and visual alarm electrically connected to the upper end of the electronic timer is installed thereon.

[0011] As a preferred sealing structure of the high and low temperature humidity and low pressure test chamber of this utility model, a heating plate is installed at the bottom of the test chamber, an ultrasonic humidifier is installed at the top of the bottom plate, and the two steam outlets of the ultrasonic humidifier extend into the interior of the test chamber. A rotary vane vacuum pump with an air inlet extending into the interior of the test chamber is installed on the outer wall of the test chamber. An embedded groove is formed through the outer wall of the test chamber, and a copper sheet is installed inside the embedded groove. A semiconductor refrigeration chip is installed at the left end of the copper sheet, and the cooling end of the semiconductor refrigeration chip is in contact with the copper sheet.

[0012] As a preferred sealing structure of the high and low temperature humidity and low pressure test chamber of this utility model, a rectangular groove is provided at the upper end of the disc, and a matching rectangular block is inserted into the inside of the rectangular groove, and a handle is installed at the upper end of the rectangular block.

[0013] As a preferred sealing structure of the high and low temperature humidity and low pressure test chamber of this utility model, the part of the support plate located on the outside of the vertical rod has a mesh structure.

[0014] As a preferred sealing structure of the high and low temperature humidity and low pressure test chamber of this utility model, a plurality of connecting rods are fixedly connected to the left end of the test chamber body, and the left ends of the plurality of connecting rods are jointly fixedly connected to a mounting plate. A heat dissipation fan with its air outlet facing the heating end of the semiconductor cooling chip is installed on the left end of the mounting plate.

[0015] As a preferred sealing structure for a high and low temperature humidity and low pressure test chamber according to this utility model, the rectangular sealing gasket is made of modified silicone rubber.

[0016] As a preferred sealing structure of the high and low temperature humidity and low pressure test chamber of this utility model, a conical guide head is provided at the lower end of the rectangular block.

[0017] The beneficial effects of this utility model are:

[0018] 1. During operation, the worm gear is driven by the handle to engage the transmission, which drives the movable plate to press the rectangular sealing gasket. The self-locking characteristic of the worm gear and the double protection of the anti-touch cylinder ensure that the movable cover maintains a constant pressing force under extreme working conditions, thereby preventing the movable cover from being opened accidentally, improving sealing stability and preventing sealing failure.

[0019] 2. Before the test, set an electronic timer and link it with an audible and visual alarm. Through precise timing control and alarm feedback mechanism, the test can be terminated in a timely manner, thus effectively ensuring the accuracy of test data and the reliability of results. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a front cross-sectional view of the overall sealing structure of a high and low temperature humidity and low pressure test chamber according to the present invention.

[0022] Figure 2 This is a partial left-side cross-sectional view of the present invention;

[0023] Figure 3 This is a partial front sectional view of the present invention;

[0024] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a partially exploded structural diagram of the present invention.

[0026] The markings in the diagram are: 1. Base plate; 2. Test chamber body; 3. Movable cover; 4. Rectangular sealing gasket; 5. Electronic timer; 6. Audible and visual alarm; 7. Connecting plate; 8. Rotating shaft; 9. Movable plate; 10. Drive box; 11. Worm gear; 12. Worm wheel; 13. Drive shaft; 14. Shaft; 15. Disc; 16. Anti-touch cylinder; 17. Rectangular groove; 18. Rectangular block; 19. Handle; 20. Support plate; 21. Vertical rod; 22. Placement plate; 23. Heating plate; 24. Ultrasonic humidifier; 25. Embedded groove; 26. Copper sheet; 27. Semiconductor cooling chip; 28. Mounting plate; 29. ​​Cooling fan; 30. Rotary vane vacuum pump. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0028] Please see Figure 1-5 A sealing structure for a high and low temperature humidity and low pressure test chamber includes a base plate 1 and a test chamber body 2 fixedly connected to the upper end of the base plate 1. A support plate 20 is fixedly connected inside the test chamber body 2. A vertical rod 21 is fixedly connected to the upper end of the support plate 20. A placement plate 22 is fixedly connected to the upper end of the vertical rod 21.

[0029] A movable cover 3 is provided above the base plate 1. A rectangular sealing gasket 4 that abuts against the upper edge of the test chamber 2 is installed at the lower end of the movable cover 3. An auxiliary sealing mechanism is provided on the rear side of the test chamber 2.

[0030] The auxiliary sealing mechanism includes two connecting plates 7 fixedly connected to the rear end of the test chamber 2. A rotating shaft 8 is rotatably connected between the two connecting plates 7. A movable plate 9 is fixedly connected between the outer wall of the rotating shaft 8 and the movable cover 3. A drive box 10 is fixedly connected to the outer wall of one of the connecting plates 7. A worm gear 11 is rotatably connected inside the drive box 10. A worm wheel 12 is meshed with the outer wall of the worm gear 11. A transmission shaft 13 is fixedly connected between the worm wheel 12 and the rotating shaft 8. A shaft 14 that passes through the drive box 10 is fixedly connected to the upper end of the worm gear 11. A disc 15 is fixedly connected to the upper end of the shaft 14. An anti-contact cylinder 16 located outside the disc 15 is fixedly connected to the upper end of the drive box 10.

[0031] An electronic timer 5 is installed on the upper end of the movable cover 3, and an audible and visual alarm 6 is installed on the upper end of the electronic timer 5, which is electrically connected to it.

[0032] In this embodiment: When in use, the product to be tested is placed on the upper end of the placement plate 22. At this time, the support plate 20, the vertical rod 21 and the placement plate 22 provide a stable support structure for the placement of the product.

[0033] When the movable cover 3 needs to be closed, the operator rotates the disc 15 through the handle 19, which drives the shaft 14 to rotate, which in turn drives the worm gear 11 in the drive box 10 to rotate. The worm gear 11 meshes with the worm wheel 12, which drives the rotating shaft 8 to rotate through the transmission shaft 13. The movable plate 9 on the outside of the rotating shaft 8 pushes the movable cover 3 to press against the test chamber 2, so that the rectangular sealing gasket 4 is tightly against the upper edge of the test chamber 2. The elastic deformation of the rectangular sealing gasket 4 fills the tiny gaps and forms a sealing effect.

[0034] After the drive is completed, remove the handle 19. The anti-touch cylinder 16 on the outside of the disc 15 prevents accidental contact that could cause the shaft 14 to rotate. The meshing transmission between the worm gear 11 and the worm wheel 12 has a self-locking characteristic, ensuring that the movable cover 3 remains locked under low air pressure differential or external force impact. In this way, the movable cover 3 is prevented from being opened accidentally, the stability of the seal is improved, and the seal is prevented from failing.

[0035] Before the test, the preset test duration is entered through the operation interface of the electronic timer 5. The electronic timer 5 starts timing in real time and displays the remaining time. When the test time reaches the preset value, the electronic timer 5 sends an electrical signal to the audible and visual alarm 6. The audible and visual alarm 6 activates the buzzer alarm and flashing lights to remind the staff that the test has ended. This avoids timing errors and reminds the staff through an alarm, thereby avoiding any impact on the accuracy and reliability of the test results.

[0036] It should be noted that the recommended model for electronic timer 5 is SUHED UP4S-S, and the model for audible and visual alarm 6 is SD5501.

[0037] As a technical optimization of this utility model, a heating plate 23 is installed at the bottom of the test chamber 2, and an ultrasonic humidifier 24 is installed at the top of the bottom plate 1. Both steam outlets of the ultrasonic humidifier 24 extend into the interior of the test chamber 2. A rotary vane vacuum pump 30 with an air inlet extending into the interior of the test chamber 2 is installed on the outer wall of the test chamber 2. An embedded groove 25 is opened through the outer wall of the test chamber 2. A copper thin plate 26 is installed inside the embedded groove 25. A semiconductor cooling chip 27 is installed at the left end of the copper thin plate 26. The cooling end of the semiconductor cooling chip 27 is in contact with the copper thin plate 26.

[0038] In this embodiment: During the test, the heating plate 23 at the bottom of the chamber can provide a high-temperature environment. The semiconductor cooling chip 27 on the outside of the chamber can conduct cold energy into the chamber through the copper plate 26. The cooling fan 29 forces heat dissipation at the hot end of the semiconductor cooling chip 27. The rotary vane vacuum pump 30 draws air into the test chamber 2 through the air inlet to achieve air pressure regulation. The ultrasonic humidifier 24 releases water mist into the chamber through two steam outlets to achieve humidity regulation. Thus, high temperature, low temperature, humid heat and low air pressure conditions can be simulated respectively.

[0039] As a technical optimization of this utility model, a rectangular groove 17 is provided at the upper end of the disc 15, and a rectangular block 18 that is compatible with it is inserted into the rectangular groove 17. A handle 19 is installed at the upper end of the rectangular block 18.

[0040] In this embodiment: by setting the rectangular groove 17 and the rectangular block 18, the handle 19 can be removed after the sealing is completed, preventing the disc 15 from being accidentally rotated by the handle 19.

[0041] As a technical optimization of this utility model, the part of the support plate 20 located outside the vertical rod 21 is a mesh structure.

[0042] In this embodiment, the mesh structure of the support plate 20 can prevent the heat generated by the heating plate 23 from being blocked.

[0043] As a technical optimization of this utility model, multiple connecting rods are fixedly connected to the left end of the test chamber 2, and the left ends of the multiple connecting rods are fixedly connected to the mounting plate 28. A heat dissipation fan 29 with its air outlet facing the heating end of the semiconductor cooling chip 27 is installed on the left end of the mounting plate 28.

[0044] In this embodiment, the cooling fan 29 forces heat dissipation at the hot end of the semiconductor cooling chip 27 to avoid affecting the cooling effect.

[0045] As a technical optimization of this utility model, the rectangular sealing gasket 4 is made of modified silicone rubber.

[0046] In this embodiment: the modified silicone rubber material has the characteristics of high temperature and low temperature resistance, and can maintain a good sealing effect in an environment of -70℃ to 260℃.

[0047] As a technical optimization of this utility model, a tapered guide head is provided at the lower end of the rectangular block 18.

[0048] In this embodiment: by setting a tapered guide head, which has a guiding function, it is convenient for the rectangular block 18 to enter the rectangular groove 17.

[0049] The working principle and usage process of this utility model: When in use, the product to be tested is placed on the upper end of the placement plate 22. At this time, the support plate 20, the vertical rod 21 and the placement plate 22 provide a stable support structure for the placement of the product.

[0050] When the movable cover 3 needs to be closed, the operator inserts the rectangular block 18 into the rectangular groove 17 of the disc 15 through the handle 19, rotates the disc 15 through the handle 19, drives the shaft 14 to rotate, drives the worm gear 11 in the drive box 10 to rotate, the worm gear 11 meshes with the worm wheel 12, drives the rotating shaft 8 to rotate through the transmission shaft 13, and the movable plate 9 on the outside of the rotating shaft 8 pushes the movable cover 3 to press against the test chamber 2, so that the rectangular sealing gasket 4 is tightly against the upper edge of the test chamber 2, and the elastic deformation of the rectangular sealing gasket 4 fills the tiny gaps to form a sealing effect;

[0051] After the drive is completed, remove the handle 19. The anti-touch cylinder 16 on the outside of the disc 15 prevents accidental contact that could cause the shaft 14 to rotate. The meshing transmission between the worm gear 11 and the worm wheel 12 has a self-locking characteristic, ensuring that the movable cover 3 remains locked under low air pressure differential or external force impact. In this way, the movable cover 3 is prevented from being opened accidentally, the stability of the seal is improved, and the seal is prevented from failing.

[0052] Before the test, the preset test duration is entered through the operation interface of the electronic timer 5. The electronic timer 5 starts timing in real time and displays the remaining time. When the test time reaches the preset value, the electronic timer 5 sends an electrical signal to the audible and visual alarm 6. The audible and visual alarm 6 activates the buzzer alarm and flashing lights to remind the staff that the test has ended. This avoids timing errors and reminds the staff through an alarm, thereby avoiding any impact on the accuracy and reliability of the test results.

[0053] During the test, the heating plate 23 at the bottom of the chamber can provide a high-temperature environment. The semiconductor cooling chip 27 on the outside of the chamber can conduct cold energy into the chamber through the copper plate 26. The cooling fan 29 on the left side can force heat dissipation from the hot end of the semiconductor cooling chip 27. The rotary vane vacuum pump 30 draws air into the test chamber 2 through the air inlet to achieve air pressure regulation. The ultrasonic humidifier 24 releases water mist into the chamber through two steam outlets to achieve humidity regulation. The mesh structure of the support plate 20 can avoid blocking heat, thus simulating high temperature, low temperature, humid heat and low air pressure conditions respectively.

[0054] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0055] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A sealing structure for a high and low temperature humidity and low pressure test chamber, comprising a base plate (1) and a test chamber body (2) fixedly connected to the upper end of the base plate (1), characterized in that: The test chamber (2) is fixedly connected to a support plate (20), and a vertical rod (21) is fixedly connected to the upper end of the support plate (20). A placement plate (22) is fixedly connected to the upper end of the vertical rod (21). A movable cover (3) is provided above the base plate (1), and a rectangular sealing gasket (4) that abuts against the upper edge of the test chamber (2) is installed at the lower end of the movable cover (3). An auxiliary sealing mechanism is provided on the rear side of the test chamber (2). The auxiliary sealing mechanism includes two connecting plates (7) fixedly connected to the rear end of the test chamber (2), a rotating shaft (8) rotatably connected between the two connecting plates (7), a movable plate (9) fixedly connected between the outer wall of the rotating shaft (8) and the movable cover (3), a drive box (10) fixedly connected to the outer wall of one of the connecting plates (7), a worm gear (11) rotatably connected inside the drive box (10), a worm wheel (12) meshing with the outer wall of the worm gear (11), a transmission shaft (13) fixedly connected between the worm wheel (12) and the rotating shaft (8), a shaft (14) penetrating the drive box (10) fixedly connected to the upper end of the worm gear (11), a disc (15) fixedly connected to the upper end of the shaft (14), and an anti-touch cylinder (16) located outside the disc (15) fixedly connected to the upper end of the drive box (10). An electronic timer (5) is installed on the upper end of the movable cover (3), and an audible and visual alarm (6) electrically connected to the upper end of the electronic timer (5).

2. The sealing structure of a high and low temperature humidity and low pressure test chamber according to claim 1, characterized in that: A heating plate (23) is installed at the bottom of the test chamber (2), and an ultrasonic humidifier (24) is installed at the top of the base plate (1). The two steam outlets of the ultrasonic humidifier (24) extend into the interior of the test chamber (2). A rotary vane vacuum pump (30) with an air inlet extending into the interior of the test chamber (2) is installed on the outer wall of the test chamber (2). An embedded groove (25) is opened through the outer wall of the test chamber (2). A copper thin plate (26) is installed inside the embedded groove (25). A semiconductor cooling chip (27) is installed on the left end of the copper thin plate (26). The cooling end of the semiconductor cooling chip (27) is in contact with the copper thin plate (26).

3. The sealing structure of a high and low temperature humidity and low pressure test chamber according to claim 1, characterized in that: The upper end of the disc (15) is provided with a rectangular groove (17), and a rectangular block (18) that is adapted to it is inserted into the interior of the rectangular groove (17). A handle (19) is installed on the upper end of the rectangular block (18).

4. The sealing structure of a high and low temperature humidity and low pressure test chamber according to claim 1, characterized in that: The portion of the support plate (20) located outside the vertical rod (21) is a mesh structure.

5. The sealing structure of a high and low temperature humidity and low pressure test chamber according to claim 2, characterized in that: The left end of the test chamber (2) is fixedly connected to multiple connecting rods, and the left ends of the multiple connecting rods are fixedly connected to a mounting plate (28). The left end of the mounting plate (28) is equipped with a heat dissipation fan (29) with its air outlet facing the heating end of the semiconductor cooling chip (27).

6. The sealing structure of a high and low temperature humidity and low pressure test chamber according to claim 1, characterized in that: The rectangular sealing gasket (4) is made of modified silicone rubber.

7. The sealing structure of a high and low temperature humidity and low pressure test chamber according to claim 3, characterized in that: The lower end of the rectangular block (18) is provided with a tapered guide head.

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