Micro-pressure adjustable pressure relief device on environmental experiment box

Abstract

The utility model discloses a micro-pressure adjustable pressure relief device on an environmental experiment box, which comprises a barrel-shaped container, a pressure relief channel is arranged on the barrel-shaped container, a perforated elastic film is arranged in the pressure relief channel, a light ball is positioned on an opening of the perforated elastic film and in the barrel-shaped container, and a pressure relief valve is arranged on the barrel-shaped container. Unification of pressure relief devices under the micro-pressure pressure relief condition can be achieved, pressure relief devices with different capacities do not need to be selected under different conditions, the pressure relief pressure can be adjusted according to requirements, the application range is wide, a complex pressure relief system is not needed during design, the specification is unified, and the variety of parts is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of environmental testing equipment, specifically relating to a micro-pressure adjustable pressure relief device for an environmental testing chamber. Background Technology

[0002] With the development of technology and the standardization of industrial production, many industries have established strict specifications and standards for the use and safety of environmental test chambers. For example, in the fields of aerospace, electronics, and automobiles, relevant standards clearly stipulate that environmental test chambers must have effective pressure relief devices to ensure the safety and reliability of the testing process. During the operation of environmental test chambers, due to the diversity of test conditions, such as the simulation of different environments like high temperature, low temperature, and high humidity, pressure may accumulate inside the chamber. If the pressure is too high and cannot be released in time, it may lead to deformation, rupture, or even explosion, posing a significant threat to surrounding personnel and equipment. Simultaneously, abnormal pressure changes within the test chamber may damage the samples being tested, affecting the accuracy and reliability of the test results. Furthermore, excessive pressure can also damage the structure of the test chamber itself and internal precision equipment such as sensors and controllers, shortening the equipment's lifespan. General pressure relief devices can only roughly control the pressure, with low pressure relief accuracy and unreliability, and are prone to problems such as spring fatigue and valve jamming, resulting in untimely or inaccurate pressure relief. Therefore, a new pressure relief structure needs to be designed to achieve highly reliable, high-precision, and variable pressure relief standards. Utility Model Content

[0003] To overcome the aforementioned shortcomings, the inventors of this utility model, through long-term exploration, experimentation, and continuous reform and innovation, have proposed a micro-pressure adjustable pressure relief device for an environmental test chamber. This device can achieve uniformity of pressure relief devices under micro-pressure relief conditions, eliminating the need to select different pressure relief devices under different conditions. The pressure relief pressure can be adjusted according to requirements, making it widely applicable. It eliminates the need for complex pressure relief systems during design, ensuring standardized specifications and reducing the variety of components.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a micro-pressure adjustable pressure relief device for an environmental test chamber. It includes a barrel-shaped container, a pressure relief channel on the barrel-shaped container, an open-pore elastic membrane in the pressure relief channel, and a lightweight ball located on the opening of the open-pore elastic membrane within the barrel-shaped container.

[0005] A further preferred technical solution of the micro-pressure adjustable pressure relief device for an environmental test chamber according to the present invention is as follows: the barrel-shaped container includes a base and a tensioning barrel, both the base and the tensioning barrel have a pressure relief channel in the middle, the edge of the perforated elastic film is fixed to the upper surface of the base, the opening of the perforated elastic film is located in the pressure relief channel, and a lightweight ball is located above the opening of the perforated elastic film.

[0006] A further preferred technical solution of the micro-pressure adjustable pressure relief device for an environmental test chamber according to the present invention is as follows: a groove is provided on the upper surface of the base, and a support is provided at the lower end of the tensioning barrel. The tensioning barrel and the base are movably installed together, and the support is located in the groove. The pressure on the perforated elastic film causes the size of the perforation of the perforated elastic film to change.

[0007] A further preferred technical solution of the micro-pressure adjustable pressure relief device for an environmental test chamber according to the present invention is as follows: an internal thread is provided on the upper inner wall of the base, and an external thread is provided on the lower outer wall of the tensioning barrel. The internal thread and the external thread cooperate to install the tensioning barrel on the base and realize the adjustment of the installation height of the tensioning barrel.

[0008] A further preferred embodiment of the micro-pressure adjustable pressure relief device for an environmental test chamber according to the present invention is as follows: the base is made of plastic, and the outer edge of the perforated elastic film is fixed to the base by ultrasonic welding.

[0009] A further preferred embodiment of the micro-pressure adjustable pressure relief device for an environmental test chamber according to the present invention is that the welded part is located on the outside of the groove on the upper surface of the base.

[0010] A further preferred technical solution of the micro-pressure adjustable pressure relief device for an environmental test chamber according to the present invention is: the pressure relief channel of the tensioning barrel is provided with a blocking structure at the top to prevent the lightweight small balls from falling out.

[0011] A further preferred embodiment of the micro-pressure adjustable pressure relief device for an environmental test chamber according to the present invention is: the pressure relief device is installed on the environmental test chamber perpendicular to the horizontal plane, so that a lightweight ball falls onto the opening of the perforated elastic membrane under the action of gravity.

[0012] Compared with the prior art, the technical solution of this utility model has the following advantages / benefits:

[0013] 1. Achieve standardization of pressure relief devices under low-pressure conditions, eliminating the need to select pressure relief devices with different capacities under different conditions. The pressure relief pressure can be adjusted according to requirements, making it widely applicable. The design does not require a complex pressure relief system, and the specifications are standardized, reducing the types of parts.

[0014] 2. The sealing is achieved by using an open-pore elastic diaphragm in combination with lightweight small balls, which to a certain extent realizes stepless adjustment of the pressure relief and can achieve precise pressure control. If necessary, a scale can be set between the base and the tensioning barrel to achieve quick adjustment. At the same time, the adjustment accuracy can be adjusted by the thread pitch. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a micro-pressure adjustable pressure relief device on an environmental test chamber according to this utility model.

[0017] The markings in the diagram are as follows: 1. Barrel-shaped container 101. Base 1011. Groove 102. Tensioning barrel 1021. Outlet 1022. Blocking structure 103. Pressure relief channel 2. Perforated elastic membrane 201. Perforation 3. Lightweight ball 4. Thread. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the detailed description of the embodiments of this utility model provided below is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0020] Example 1

[0021] like Figure 1As shown, a micro-pressure adjustable pressure relief device for an environmental test chamber is disclosed. It includes a barrel-shaped container 1 with a pressure relief channel 103. An open-pore elastic membrane 2 is disposed within the pressure relief channel 103. The size of the opening 201 of the open-pore elastic membrane 2 is adjustable. Generally, the size of the central opening is adjusted by externally pressing the open-pore elastic membrane 2. Adjustment can be achieved by using a ring ring for pressing, or by tightening or loosening the edges of the open-pore elastic membrane 2 using other methods. A lightweight ball 3 is located on the opening 201 of the open-pore elastic membrane 2 within the barrel-shaped container 1.

[0022] Example 2

[0023] Based on Embodiment 1, the barrel-shaped container 1 includes a base 101 and a tensioning barrel 102. Both the base 101 and the tensioning barrel 102 have a pressure relief channel 103 in the middle. The edge of the perforated elastic membrane 2 is fixed to the upper surface of the base 101. The opening 201 of the perforated elastic membrane 2 is located in the pressure relief channel 103. The lightweight ball 3 is located above the opening of the perforated elastic membrane 2. The pressure relief device is installed vertically on the environmental test chamber, so that the lightweight ball 3 falls on the opening of the perforated elastic membrane 2 under the action of gravity, thereby sealing the opening of the perforated elastic membrane 2 and achieving a seal under a certain pressure. The sealing pressure can be adjusted by adjusting the size of the opening 201.

[0024] The upper surface of the base 101 is provided with a groove 1011, and the lower end of the tensioning barrel 102 is provided with a support 1021. The tensioning barrel 102 and the base 101 are movably installed together, and the support 1021 is located in the groove 1011. There are various ways to move and install it, such as threaded or graduated, as long as the position can be moved and stopped. The pressure on the perforated elastic film 2 causes the size of the opening of the perforated elastic film 2 to change.

[0025] This embodiment uses a thread 4 structure. An internal thread is provided on the upper inner wall of the base 101, and an external thread is provided on the lower outer wall of the tensioning barrel 102. The internal thread and the external thread cooperate to install the tensioning barrel 102 on the base 101 and realize the installation height adjustment of the tensioning barrel 102. The adjustment accuracy can be controlled by adjusting the thread pitch.

[0026] The base 101 is made of plastic, and the outer edge of the perforated elastic film 2 is fixed to the base 101 by ultrasonic welding.

[0027] The welding area is located on the outer side of the groove 1011 on the upper surface of the base 101, that is, the outermost area of ​​the perforated elastic film 2. Ultrasonic welding is used to achieve complete fixation while avoiding affecting the structure of the perforated elastic film 2 for applying pressure and tensioning.

[0028] The pressure relief channel 103 of the tensioning barrel 102 has a blocking structure 1022 at the top to prevent the lightweight ball 3 from falling out. In this embodiment, the diameter of the pressure relief channel 103 at the top of the tensioning barrel 102 is reduced to form the blocking structure 1022. Of course, other blocking structures, such as mesh or blocking bars, can also be set.

[0029] Working principle: Based on the pressure formula: F is the force (F=mg), and S is the area of ​​force application; the pressure relief capacity is adjusted by continuously changing the area of ​​force application. The product is installed on the upper part of the environmental chamber and connected to the inner chamber. The external structure consists of a small ball of mass m placed inside a cylindrical container. The bottom of the cylindrical container is connected to the environmental chamber. Additionally, there is a baffle inside the cylindrical container with an adjustable hole. The pressure relief device is adjustable by changing the area of ​​force application through this hole.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A micro-pressure adjustable pressure relief device on an environmental test chamber, characterized in that, It includes a barrel-shaped container, a pressure relief channel is arranged on the barrel-shaped container, an elastic film with holes is arranged in the pressure relief channel, light small balls are arranged on the holes of the elastic film with holes, the light small balls are arranged in the barrel-shaped container, the barrel-shaped container includes a base and a tension barrel, the base and the tension barrel are both provided with a pressure relief channel in the middle, the edge of the elastic film with holes is fixed on the upper surface of the base, the holes of the elastic film with holes are located in the pressure relief channel, the light small balls are located on the upper part of the holes of the elastic film with holes, the upper surface of the base is provided with a groove, the tension barrel is movably installed between the base and the tension barrel and the discharge part is located in the groove, the elastic film with holes is extruded to change the size of the holes of the elastic film with holes.

2. The adjustable micro-pressure relief device on an environmental test chamber according to claim 1, wherein, An inner thread is arranged on the inner wall of the upper part of the base, an outer thread is arranged on the outer wall of the lower part of the tension barrel, the inner thread cooperates with the outer thread to install the tension barrel on the base and realize the installation height adjustment of the tension barrel.

3. The adjustable micro-pressure relief device on an environmental test chamber according to claim 1, wherein, The base is made of plastic material, the outer edge of the elastic film with holes is fixed on the base by ultrasonic welding.

4. The adjustable micro-pressure relief device on an environmental test chamber according to claim 3, wherein, The welded part is located outside the groove on the upper surface of the base.

5. The adjustable micro-pressure relief device on an environmental test chamber according to claim 1, wherein, The pressure relief channel of the tension barrel is provided with a blocking structure at the upper part to prevent the light small balls from falling out.

6. The adjustable micro-pressure relief device on an environmental test chamber according to claim 1, wherein, The pressure relief device is installed on the environmental test chamber perpendicular to the horizontal plane, so that the light small balls fall on the holes of the elastic film with holes under the action of gravity.

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