Sealing environment bin with multi-layer sealing structure

Abstract

The utility model relates to the technical field of environment simulation test equipment, and particularly discloses a sealing environment bin with a multilayer sealing structure, which comprises a box body, a box door with a double-open structure is arranged at the front end of the box body, a silica gel sealing ring is embedded in the inner side of the box door, and a fluororubber sealing ring is embedded in the outer side of the box door. An air cylinder is installed at the top of the front end face of the box body, the side wall of the box body communicates with a connecting pipe, and through the design of a multi-layer sealing box door, a pipeline composite sealing connector and an optimized air duct circulating system, the overall sealing reliability and the temperature field uniformity of the environment bin under extreme temperature alternation are remarkably improved; the cold and hot dual-mode temperature control system achieves more efficient and accurate temperature regulation and control, the heat preservation box wall reduces energy consumption, the operability and safety of the equipment are improved through the convenient control system and the safety observation window, the problems that traditional equipment is prone to failure in sealing, low in temperature control efficiency and lack of protection are solved, and the service life of the equipment is prolonged. And the accuracy and the reliability of sealing performance testing of products such as fasteners are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of environmental simulation testing equipment, and specifically discloses a sealed environmental chamber with a multi-layer sealing structure. Background Technology

[0002] Sealing environment chambers are core equipment for testing the sealing performance of fasteners such as elastic clamps and worm gear hose clamps. They verify the sealing reliability of products under real-world operating conditions by simulating extreme temperature and humidity conditions (e.g., -45℃ to 180℃). This type of equipment is widely used in the automotive, aerospace, and pipeline engineering industries, playing a crucial role in preventing safety accidents caused by media leaks. Traditional environment chambers typically consist of a sealed enclosure, a temperature and humidity control system, and an air circulation unit. Cooling / heating modules alter the environmental parameters inside the chamber, and forced airflow circulation via fans achieves a uniform temperature distribution.

[0003] However, existing sealed environmental chamber doors mostly use single-layer rubber sealing rings, which are prone to aging and cracking under extreme temperature changes. Pipeline interfaces rely solely on ordinary flange connections, which create gaps during thermal expansion and contraction, leading to media leakage. Furthermore, temperature control is inconvenient and inefficient. The chamber lacks real-time monitoring of internal temperature and humidity and an automatic over-limit protection mechanism, making it easy to damage samples when the equipment overheats. Utility Model Content

[0004] This invention proposes a sealed environment chamber with a multi-layer sealing structure, which solves the problems of easy seal failure, low temperature control efficiency, and lack of protection in traditional equipment, and improves the accuracy and reliability of sealing performance testing for products such as fasteners.

[0005] This utility model is implemented as follows: a sealed environment chamber with a multi-layer sealing structure includes a box body. The front end of the box body is provided with a double-opening door. A silicone sealing ring is embedded on the inner side of the door, and a fluororubber sealing ring is embedded on the outer side. A cylinder is installed on the top of the front end face of the box body. The output end of the cylinder is fixedly connected to a locking plate located at the front end of the door. A connecting pipe is connected to the side wall of the box body. From the inside to the outside, a metal gasket, an expanded graphite ring, and a compression flange are sequentially fitted at the connection between the connecting pipe and the box body.

[0006] The air duct structure includes an air duct located on the right side inside the housing. A first fan and a second fan are respectively installed on the upper and lower sides inside the air duct. An air supply pipe is fixedly connected to the air outlet of the second fan.

[0007] The temperature and humidity control module includes an evaporator, a compressor, a condenser, and a capillary tube installed in the interlayer of the rear wall of the housing. The evaporator, compressor, condenser, and capillary tube are connected in series via copper pipes. It also includes an electric heating element installed inside the air duct.

[0008] As a preferred embodiment of the sealed environment chamber with a multi-layer sealing structure of this utility model, a temperature and humidity sensor is provided at the top of the interior of the chamber.

[0009] As a preferred embodiment of the sealed environment chamber with a multi-layer sealing structure of this utility model, the upper surface of the air supply pipe is provided with a plurality of air supply holes with a diameter of 5-8mm and a spacing of 20-30mm.

[0010] As a preferred embodiment of the sealed environment chamber with a multi-layer sealing structure of the present invention, a control box is fixedly connected to the right side wall of the chamber, a controller is installed inside the control box, and a control panel is installed on the outer wall of the control box.

[0011] As a preferred embodiment of the sealed environment chamber with a multi-layer sealing structure of this utility model, the outer wall of the control box is also equipped with an audible and visual alarm.

[0012] As a preferred embodiment of the sealed environment chamber with a multi-layer sealing structure of the present invention, two observation windows are embedded in the outer wall of the chamber door, and the observation windows are double-layered tempered glass.

[0013] As a preferred example of a sealed environmental chamber with a multi-layer sealing structure according to this utility model, the chamber wall comprises, from the outside to the inside, a flame-retardant fiberglass layer, a stainless steel heat insulation board, and a polyurethane insulation layer, with adjacent layers bonded together by an adhesive.

[0014] The beneficial effects of this utility model are:

[0015] Through multi-layer sealed door design, composite sealed pipeline interfaces, and an optimized air circulation system, the overall sealing reliability and temperature field uniformity of the environmental chamber under extreme temperature fluctuations are significantly improved. The dual-mode temperature control system, combined with real-time temperature and humidity monitoring and an automatic over-limit protection mechanism, achieves more efficient and precise temperature control and effectively prevents overheating and damage to samples. The composite insulated chamber wall reduces energy consumption, and the convenient control system and safety observation window improve the operability and safety of the equipment. It solves the problems of easy seal failure, low temperature control efficiency, and lack of protection in traditional equipment, and improves the accuracy and reliability of sealing performance testing for products such as fasteners. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a front view of the overall external structure of this utility model;

[0018] Figure 2 This is a front view of the overall internal structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the interlayer structure of the rear wall of the box body of this utility model;

[0020] Figure 4 This is a cross-sectional structural diagram of the door of this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of the sealing structure of this utility model;

[0022] Figure 6 This is a cross-sectional structural diagram of the box wall of this utility model.

[0023] The markings in the diagram are as follows: 1. Cabinet; 2. Cabinet door; 3. Silicone sealing ring; 4. Fluororubber sealing ring; 5. Connecting pipe; 6. Metal gasket; 7. Expanded graphite ring; 8. Compression flange; 9. Cylinder; 10. Locking plate; 11. Evaporator; 12. Compressor; 13. Condenser; 14. Capillary tube; 15. Electric heating element; 16. Air duct; 17. First fan; 18. Second fan; 19. Air supply duct; 20. Air supply hole; 21. Temperature and humidity sensor; 22. Control box; 23. Control panel; 24. Audible and visual alarm; 25. Observation window; 26. Flame-retardant fiberglass layer; 27. Stainless steel insulation board; 28. Polyurethane insulation layer; 29. ​​Copper pipe. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-6 A sealed environment chamber with a multi-layer sealing structure includes a chamber body 1. The front end of the chamber body 1 is provided with a double-opening door 2. The inner side of the door 2 is fitted with a silicone sealing ring 3, and the outer side is fitted with a fluororubber sealing ring 4. A cylinder 9 is installed on the top of the front end face of the chamber body 1. The output end of the cylinder 9 is fixedly connected to a locking plate 10 located at the front end of the door 2. A connecting pipe 5 is connected to the side wall of the chamber body 1. The connection between the connecting pipe 5 and the chamber body 1 is sequentially fitted with a metal gasket 6, an expanded graphite ring 7, and a compression flange 8 from the inside to the outside.

[0026] The air duct structure includes an air duct 16 located on the right side inside the housing 1. A first fan 17 and a second fan 18 are installed on the upper and lower sides of the air duct 16 respectively. An air supply pipe 19 is fixedly connected to the air outlet of the second fan 18.

[0027] The temperature and humidity control module includes an evaporator 11, a compressor 12, a condenser 13, and a capillary tube 14 installed in the interlayer of the rear wall of the housing 1. The evaporator 11, compressor 12, condenser 13, and capillary tube 14 are connected in series via copper pipe 29. It also includes an electric heating tube 15 installed inside the air duct 16.

[0028] In this embodiment: a silicone sealing ring 3 is provided on the inner side of the door 2, which has good elasticity and reliable low-temperature sealing. A fluororubber sealing ring 4 is provided on the outer side, which is resistant to high temperature and aging. Together with the cylinder 9 driving the locking plate 10, a constant pressure is applied to the door 2 to ensure reliable sealing under extreme temperature changes and effectively prevent leakage caused by aging and cracking of the sealing ring or thermal expansion and contraction.

[0029] Metal gaskets 6 are sequentially fitted at the interface between the connecting pipe 5 and the housing 1 to provide basic support and initial sealing. Expanded graphite rings 7 expand at high temperature to fill the gap, and clamping flanges 8 are used to press and fix the pipe. By utilizing the properties of different materials, the gap is dynamically compensated during thermal expansion and contraction, which significantly improves the sealing reliability of the pipeline interface.

[0030] A first fan 17 is installed in the air duct 16 to introduce fresh air from outside or circulate air from inside the chamber, and a second fan 18 drives the airflow. The outlet of the second fan 18 is connected to the air supply pipe 19, and air supply holes 20 are evenly opened on its surface to make the airflow evenly dispersed and make the airflow circulate at high speed in the box 1, which greatly improves the uniformity of the temperature field.

[0031] Evaporator 11, compressor 12, condenser 13 and capillary tube 14 are connected in series through copper tube 29 to form a refrigeration system that absorbs heat from inside the box to cool down and dehumidify. An electric heating tube 15 is installed in the air duct 16 to heat the air and raise its temperature. The controller can precisely switch or combine the refrigeration and heating modes to achieve efficient and rapid control of the internal temperature of the box 1.

[0032] As a technical optimization of this utility model, a temperature and humidity sensor 21 is provided at the top of the inside of the box 1.

[0033] In this embodiment: a temperature and humidity sensor 21 is arranged at the top inside the box 1 to monitor the temperature and humidity parameters of the core area inside the box 1 in real time and accurately, providing direct feedback for precise control.

[0034] As a technical optimization of this utility model, the upper surface of the air supply pipe 19 is evenly provided with a plurality of air supply holes 20, the hole diameter is 5-8mm and the hole spacing is 20-30mm.

[0035] In this embodiment, uniform air supply holes 20 with a diameter of 5-8mm and a spacing of 20-30mm are opened on the air supply duct 19 to optimize airflow distribution, generate fine and uniform airflow bundles, and ensure high uniformity of temperature and humidity in space.

[0036] As a technical optimization of this utility model, a control box 22 is fixedly connected to the right side wall of the box 1. The control box 22 is equipped with a controller inside and a control panel 23 is provided on the outer wall of the control box 22.

[0037] In this embodiment: the control box 22 integrates a controller, and a control panel 23 is set on the outer wall to realize centralized management and convenient human-machine interaction operation of equipment temperature and humidity setting, start and stop, mode selection, and status display. It should be noted that the controller (such as a PLC or microprocessor) and its basic logic and circuit connection method for realizing the coordinated control of temperature and humidity setting, start and stop, mode selection, and status display of components in the temperature and humidity control module and air duct structure are common knowledge and mature existing technology in the field of automation control. Therefore, the claims and specification focus on describing the unique mechanical structure innovation of this device and its functional implementation method. The specific circuit structure, programming logic and electrical connection principle between various components (such as wiring method, interface protocol, etc.) of the controller are not described in detail. Its core function of realizing automation control can be understood and implemented by those skilled in the art based on the structural description of this device.

[0038] As a technical optimization of this utility model, the outer wall of the control box 22 is also equipped with an audible and visual alarm 24.

[0039] In this embodiment: an audible and visual alarm 24 is installed on the outer wall of the control box 22. When the temperature and humidity sensor 21 detects that the parameters are out of limit or the equipment is faulty, the audible and visual alarm is automatically triggered to promptly remind the operator to intervene and provide an automatic protection mechanism for exceeding the limit.

[0040] As a technical optimization of this utility model, two observation windows 25 are embedded in the outer wall of the door 2, and the observation windows 25 are double-layered tempered glass.

[0041] In this embodiment: the door 2 is embedded with a double-layered tempered glass observation window 25, providing a safe and clear internal view, facilitating real-time observation of the sample status, while the double-layered structure enhances the thermal insulation performance.

[0042] As a technical optimization of this utility model, the box wall of the box body 1 includes, from the outside to the inside, a flame-retardant fiberglass layer 26, a stainless steel heat insulation board 27, and a polyurethane insulation layer 28, with adjacent layers bonded together by an adhesive.

[0043] In this embodiment: the wall of the box 1 is made of flame-retardant fiberglass layer 26, stainless steel heat insulation board 27 and polyurethane heat insulation layer 28 bonded together from the outside to the inside, which significantly improves the overall heat insulation performance, enhances safety, and provides structural strength and corrosion resistance.

[0044] The working principle and usage process of this utility model are as follows: After the operator sets the target parameters through the control panel 23, the controller starts the corresponding working mode. During cooling, the compressor 12 compresses the refrigerant into a high-temperature and high-pressure gas, which is then liquefied by the condenser 13 and throttled through the capillary tube 14 to form a low-temperature and low-pressure mixture that enters the evaporator 11. The evaporator 11 absorbs heat from the air inside the chamber 1 to achieve cooling and dehumidification. During heating, the electric heating tube 15 in the air duct 16 is activated to directly heat the air. The first fan 17 draws in fresh air from outside or recirculated air from inside the chamber into the air duct 16, which flows through the evaporator 11 or the electric heating tube 15 for temperature and humidity adjustment. The second fan 18 pressurizes the processed air and sends it into the air supply pipe 19, which forms a fine airflow through the evenly distributed air supply holes 20 and is evenly delivered into the interior of the chamber 1. After the airflow circulates inside the chamber and exchanges heat and moisture with the sample, it is drawn back into the air duct 16 by the first fan 17, forming a forced circulation. The temperature and humidity sensor 21 on the top of the chamber 1 continuously monitors the environmental parameters and feeds them back to the controller. The controller dynamically adjusts the operation of the compressor 12, the electric heating tube 15, the first fan 17, and the second fan 18 to achieve precise control. If an over-limit is detected (such as overheating), the controller will cut off the relevant power supply and trigger the audible and visual alarm 24. When the chamber door 2 is closed, the inner silicone sealing ring 3 and the outer fluororubber sealing ring 4 fit against the chamber opening. The cylinder 9 drives the locking plate 10 to press the chamber door 2 to provide a constant locking force. At the interface of the connecting pipe 5, the metal gasket 6 and the expanded graphite ring 7 form a seal under the action of the clamping flange 8, which together ensures the reliability of the seal under extreme temperatures.

[0045] 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.

[0046] 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 sealed environment chamber with a multi-layer sealing structure, characterized in that: The enclosure includes a housing (1), the front end of which is provided with a double-opening door (2). The inner side of the door (2) is fitted with a silicone sealing ring (3), and the outer side is fitted with a fluororubber sealing ring (4). A cylinder (9) is installed on the top of the front end of the housing (1). The output end of the cylinder (9) is fixedly connected to a locking plate (10) located at the front end of the door (2). A connecting pipe (5) is connected to the side wall of the housing (1). The connection between the connecting pipe (5) and the housing (1) is fitted with a metal gasket (6), an expanded graphite ring (7), and a clamping flange (8) from the inside to the outside. The air duct structure includes an air duct (16) located on the right side inside the box (1). A first fan (17) and a second fan (18) are installed on the upper and lower sides of the air duct (16) respectively. An air supply pipe (19) is fixedly connected to the air outlet of the second fan (18). The temperature and humidity control module includes an evaporator (11), a compressor (12), a condenser (13) and a capillary tube (14) installed in the interlayer of the rear wall of the housing (1). The evaporator (11), compressor (12), condenser (13) and capillary tube (14) are connected in series through a copper tube (29). It also includes an electric heating tube (15) installed inside the air duct (16).

2. The sealed environment chamber with a multi-layer sealing structure according to claim 1, characterized in that: A temperature and humidity sensor (21) is installed at the top of the inside of the box (1).

3. A sealed environmental chamber with a multi-layer sealing structure according to claim 1, characterized in that: The upper surface of the air supply pipe (19) is uniformly provided with multiple air supply holes (20), with a hole diameter of 5-8mm and a hole spacing of 20-30mm.

4. A sealed environmental chamber with a multi-layer sealing structure according to claim 1, characterized in that: A control box (22) is fixedly connected to the right side wall of the box (1). A controller is installed inside the control box (22), and a control panel (23) is installed on the outer wall of the control box (22).

5. A sealed environment chamber with a multi-layer sealing structure according to claim 4, characterized in that: The outer wall of the control box (22) is also equipped with an audible and visual alarm (24).

6. A sealed environment chamber with a multi-layer sealing structure according to claim 1, characterized in that: The outer wall of the box door (2) is fitted with two observation windows (25), which are double-layered tempered glass.

7. A sealed environmental chamber with a multi-layer sealing structure according to claim 1, characterized in that: The box wall of the box body (1) consists of a flame-retardant fiberglass layer (26), a stainless steel heat insulation board (27), and a polyurethane insulation layer (28) from the outside to the inside, and the adjacent two layers are bonded together with adhesive.

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