Pressure relief box assembly of high and low temperature test box
By designing the pressure relief box components of the T-shaped positive pressure relief chamber and the negative pressure relief chamber, the self-sealed rubber plate and grille structure are used to achieve automatic pressure adjustment, which solves the problem of pressure changes in the high and low temperature test chambers during the switching between high and low temperatures, and achieves a simple structure and low cost pressure relief effect.
Patent Information
- Application Number
- CN202420923027.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-29
AI Technical Summary
During the switching between high and low temperature test chambers, pressure relief is required due to pressure changes caused by air expansion and contraction, but the existing electronic valves are costly and complex in structure.
A pressure relief box assembly including a T-shaped positive pressure relief chamber and a negative pressure relief chamber is designed, and adopts a self-closed rubber plate and grille structure to achieve automatic pressure regulation through the main pressure relief passage and the secondary pressure relief port.
It realizes a simple structure and low cost pressure relief effect, which can effectively adjust the pressure inside the test chamber and avoid the large pressure problems caused by air expansion and contraction caused by high and low temperature conversion.
Smart Images
Figure CN222633925U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of experimental equipment, in particular to a pressure relief box component of a high and low temperature test box. Background Art
[0002] High and low temperature test chamber is an industrial testing instrument, suitable for high and low temperature reliability test of industrial products. It can test various performance indicators of parts and materials of related products such as electronics and electrical, automobiles and motorcycles, aerospace, ships and weapons, colleges and universities, scientific research institutions, etc. under high and low temperature (alternating) cycle changes.
[0003] During the high and low temperature switching process, the expansion and contraction of the air causes a large pressure to be generated when the high and low temperature conversion is performed, so the air in the working room of the high and low temperature test chamber needs to be depressurized. Currently, electronic valves are mostly used for the pressure relief process, which are easy to control but have a high cost.
[0004] Therefore, those skilled in the art are committed to developing a pressure relief box assembly for a high and low temperature test chamber with a simple structure and low cost. Summary of the invention
[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is to provide a pressure relief box assembly of a high and low temperature test box with a simple structure and low cost.
[0006] To achieve the above-mentioned purpose, the utility model provides a pressure relief box assembly of a high and low temperature test chamber, comprising a T-shaped positive pressure relief chamber and two negative pressure relief chambers respectively located at the lower ends of the ribs on both sides of the T-shaped positive pressure relief chamber, a main pressure relief channel running through the upper and lower parts is arranged in the middle of the T-shaped positive pressure relief chamber, a main pressure relief port is arranged on the top of the main pressure relief channel, and a first self-sealing rubber plate is installed on the main pressure relief port; a secondary pressure relief port which can be connected to the inside of the T-shaped positive pressure relief chamber is arranged on the top of the negative pressure relief chamber, and a second self-sealing rubber plate is installed on the secondary pressure relief port, and negative pressure air inlets connected to the outside are respectively arranged on both sides of the negative pressure relief chamber.
[0007] Furthermore, the bottom of the T-shaped positive pressure relief chamber and the negative pressure relief chamber are connected to a water receiving tray, and the lower end of the water receiving tray is provided with a drainage port connected to the outside.
[0008] Furthermore, the main pressure relief port is installed with a main grille, and the first self-sealing rubber plate is installed on the top of the main grille. In a natural state, the first self-sealing rubber plate seals the main grille.
[0009] Furthermore, a first threaded hole is provided in the center of the main grille, a first cross frame is installed in the center of the top of the first self-sealing rubber plate, and a bolt threadedly connected to the first threaded hole is provided in the center of the first cross frame.
[0010] Furthermore, a plurality of first counterweights are installed on the edge of the first self-sealing rubber plate.
[0011] Furthermore, the auxiliary pressure relief port is installed with an auxiliary grille, and the second self-sealing rubber plate is installed on the top of the auxiliary grille. In a natural state, the second self-sealing rubber plate seals the auxiliary grille.
[0012] Furthermore, a second threaded hole is provided in the center of the auxiliary grille, a second cross frame is installed in the center of the top of the second self-sealing rubber plate, and a bolt threadedly connected to the second threaded hole is provided in the center of the second cross frame.
[0013] Furthermore, a plurality of second counterweights are installed on the edge of the second self-sealing rubber plate.
[0014] Furthermore, a connecting flange is installed at the bottom of the main pressure relief channel.
[0015] Furthermore, a negative pressure air inlet grille is installed on the negative pressure air inlet.
[0016] The beneficial effects of the utility model are as follows: the pressure relief box assembly of the high and low temperature test box of the utility model comprises a T-shaped positive pressure relief chamber and two negative pressure relief chambers respectively located at the lower ends of the ribs on both sides of the T-shaped positive pressure relief chamber, a main pressure relief channel running through from top to bottom is arranged in the middle of the T-shaped positive pressure relief chamber, a main pressure relief port is arranged on the top of the main pressure relief channel, and a first self-sealing rubber plate is installed on the main pressure relief port; a secondary pressure relief port which can be communicated with the inside of the T-shaped positive pressure relief chamber is arranged on the top of the negative pressure relief chamber, a second self-sealing rubber plate is installed on the secondary pressure relief port, negative pressure air inlets communicating with the outside are respectively arranged on both sides of the negative pressure relief chamber, and the pressure relief box assembly of the utility model is as follows: Installed on the high and low temperature test chamber, the first self-sealing rubber plate and the second self-sealing rubber plate seal the main pressure relief port and the auxiliary pressure relief port respectively. During the high and low temperature switching process, when the internal pressure is too high, the first self-sealing rubber plate opens, the second self-sealing rubber plate closes, and the main pressure relief port is vented and pressure relieved; when the internal pressure is lower than the external pressure, the first self-sealing rubber plate closes, the second self-sealing rubber plate opens, and the external air enters the high and low temperature test chamber from the negative pressure air inlet, the auxiliary pressure relief port and the main pressure relief channel. It has a simple structure and good pressure regulation effect, and solves the problem of high pressure generated by the expansion and contraction of air in the working room of the test chamber due to the conversion between high and low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model;
[0018] Figure 2 It is a structural side view of the utility model;
[0019] Figure 3 yes Figure 2 Schematic diagram of the structure at AA in the middle;
[0020] Figure 4 It is a schematic diagram of the structural decomposition of the utility model. DETAILED DESCRIPTION
[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific manner, and therefore cannot be understood as a limitation on the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0022] like Figures 1 to 4 As shown, a pressure relief box assembly of a high and low temperature test chamber comprises a T-shaped positive pressure relief chamber 1 and two negative pressure relief chambers respectively located at the lower ends of the ribs on both sides of the T-shaped positive pressure relief chamber 1. A main pressure relief channel 3 running through the upper and lower parts is arranged in the middle of the T-shaped positive pressure relief chamber 1. A connecting flange 11 is installed at the bottom of the main pressure relief channel 3 for connecting the high and low temperature test chamber. A main pressure relief port is arranged at the top of the main pressure relief channel 3. A first self-sealing adhesive is installed on the main pressure relief port. Plate 5; a secondary pressure relief port which can be communicated with the inside of the T-shaped positive pressure relief tank 1 is arranged on the top of the negative pressure relief tank, a second self-sealing rubber plate 7 is installed on the secondary pressure relief port, negative pressure air inlets 8 which are communicated with the outside are respectively arranged on both sides of the negative pressure relief tank, a negative pressure air inlet grille 81 is installed on the negative pressure air inlet 8, the pressure relief box assembly is installed on a high and low temperature test box, and the first self-sealing rubber plate and the second self-sealing rubber plate respectively seal the main pressure relief port and the secondary pressure relief port.
[0023] During the high and low temperature conversion process, there are two working states in the working room of the high and low temperature test box. One is that when the temperature rises from low temperature, the air in the working room expands. At this time, the internal pressure is too large, and the expanded gas in the box needs to be discharged outside the working room. The first self-sealing rubber plate is opened, and the second self-sealing rubber plate is closed. The gas in the working room is discharged and pressure relieved through the main pressure relief channel 3 and the main pressure relief port. The other state is when the temperature drops from high temperature, the air in the working room will shrink, and negative pressure will appear in the working room. At this time, the first self-sealing rubber plate is closed, and the second self-sealing rubber plate is opened. External air enters the high and low temperature test box from the negative pressure air inlet, the auxiliary pressure relief port and the main pressure relief channel to avoid problems such as deformation of the working room due to pressure. The structure is simple and the pressure regulation effect is good. It solves the problem of large pressure generated by the expansion and contraction of air in the working room of the test box due to the conversion between high temperature and low temperature, and ensures that the pressure in the working room is always consistent with the atmospheric pressure.
[0024] The pressure relief box assembly can also be used in wet heat high and low temperature test chambers, etc.
[0025] The bottom of the T-shaped positive pressure relief chamber 1 and the negative pressure relief chamber are connected with a water receiving pan 9, the lower end of the water receiving pan 9 is provided with a drain port 10 connected to the outside, and the bottom of the negative pressure relief chamber is provided with a penetrating water flow hole 12, and the water in the negative pressure relief chamber can flow into the water receiving pan 9 from the water flow hole 12, and then be discharged from the drain port 10.
[0026] In this embodiment, the main pressure relief port is installed with a main grille 41, and the first self-sealing rubber plate 5 is installed on the top of the main grille 41. In a natural state, the first self-sealing rubber plate 5 seals the main grille 41; a first threaded hole is provided in the center of the main grille 41, and a first cross frame 51 is provided in the center of the top of the first self-sealing rubber plate 5, and a bolt threadedly connected to the first threaded hole is provided in the center of the first cross frame 51; a plurality of first counterweights 52 are also installed on the edge of the first self-sealing rubber plate 5. Due to the gravity of the first counterweight 52 and the elasticity of the first self-sealing rubber plate 5 itself, the first self-sealing rubber plate 5 can better seal the main pressure relief port in a natural state.
[0027] The auxiliary pressure relief port is installed with an auxiliary grille 61, and the second self-sealing rubber plate 7 is installed on the top of the auxiliary grille 61. In a natural state, the second self-sealing rubber plate 7 seals the auxiliary grille 61; a second threaded hole is provided in the center of the auxiliary grille 61, and a second cross frame 71 is installed in the center of the top of the second self-sealing rubber plate 7, and a bolt threadedly connected to the second threaded hole is provided in the center of the second cross frame 71; a plurality of second counterweights 72 are also installed on the edge of the second self-sealing rubber plate 7; due to the gravity of the second counterweight 72 and the elasticity of the second self-sealing rubber plate 7 itself, the second self-sealing rubber plate 7 can better seal the auxiliary pressure relief port in a natural state.
[0028] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.
Claims
1. A pressure relief box assembly for a high and low temperature test chamber, characterized in that: The invention comprises a T-shaped positive pressure relief chamber (1) and two negative pressure relief chambers respectively located at the lower ends of the ribs on both sides of the T-shaped positive pressure relief chamber (1); a main pressure relief channel (3) running through the upper and lower parts is arranged in the middle of the T-shaped positive pressure relief chamber (1); a main pressure relief port is arranged at the top of the main pressure relief channel (3); a first self-sealing rubber plate (5) is installed on the main pressure relief port; a secondary pressure relief port which can communicate with the inside of the T-shaped positive pressure relief chamber (1) is arranged at the top of the negative pressure relief chamber; a second self-sealing rubber plate (7) is installed on the secondary pressure relief port; and negative pressure air inlets (8) which communicate with the outside are respectively arranged on both sides of the negative pressure relief chamber.
2. The pressure relief box assembly of the high and low temperature test chamber according to claim 1 is characterized in that: The bottoms of the T-shaped positive pressure relief chamber (1) and the negative pressure relief chamber are connected to a water receiving pan (9), and the lower end of the water receiving pan (9) is provided with a drainage port (10) communicating with the outside.
3. The pressure relief box assembly of the high and low temperature test chamber according to claim 1 is characterized in that: The main pressure relief port is provided with a main grille (41), and the first self-sealing rubber plate (5) is installed on the top of the main grille (41). In a natural state, the first self-sealing rubber plate (5) seals the main grille (41).
4. The pressure relief box assembly of the high and low temperature test chamber according to claim 3 is characterized in that: A first threaded hole is arranged at the center of the main grille (41), a first cross frame (51) is installed at the center of the top of the first self-sealing rubber plate (5), and a bolt threadedly connected to the first threaded hole is arranged at the center of the first cross frame (51).
5. The pressure relief box assembly of the high and low temperature test chamber according to claim 4, characterized in that: A plurality of first counterweights (52) are also installed on the edge of the first self-sealing rubber plate (5).
6. The pressure relief box assembly of the high and low temperature test chamber according to claim 1, characterized in that: The secondary pressure relief port is provided with a secondary grille (61), and the second self-sealing rubber sheet (7) is installed on the top of the secondary grille (61). In a natural state, the second self-sealing rubber sheet (7) seals the secondary grille (61).
7. The pressure relief box assembly of the high and low temperature test chamber according to claim 6, characterized in that: A second threaded hole is arranged at the center of the auxiliary grille (61), a second cross frame (71) is installed at the center of the top of the second self-sealing rubber plate (7), and a bolt threadedly connected to the second threaded hole is arranged at the center of the second cross frame (71).
8. The pressure relief box assembly of the high and low temperature test chamber according to claim 7, characterized in that: A plurality of second counterweights (72) are also installed on the edge of the second self-sealing rubber plate (7).
9. The pressure relief box assembly of the high and low temperature test chamber according to claim 1, characterized in that: A connecting flange (11) is installed at the bottom of the main pressure relief channel (3).
10. The pressure relief box assembly of the high and low temperature test chamber according to claim 1, characterized in that: A negative pressure air intake grille (81) is installed on the negative pressure air intake port (8).