Test explosion venting device and test box

Abstract

The invention discloses a test explosion venting device and a test box. The test explosion venting device comprises a double-chain structure vacuum turning plate and a pneumatic pressing device. The double-chain structure vacuum turning plate is mounted on the box body pressure relief opening of the test box and is used for performing pressure relief operation on the interior of the test box; and the pneumatic pressing device is connected with the double-chain structure vacuum turning plate and is used for performing pressing operation on the double-chain structure vacuum turning plate, so that the sealing ring in the double-chain structure vacuum turning plate is in a pressed state. According to the test explosion venting device and the test box, the structural design is scientific, the test explosion venting device can reliably meet the requirements of repeated use and vacuum sealing performance assurance proposed by users of test boxes such as an explosion-proof environment test box and an explosive atmosphere test box, the sealing effect is excellent, the repeated use performance is high, and the test box is convenient to use. The method has great practical significance.

Description

Technical Field

[0001] The invention relates to the technical field of environmental testing and atmospheric testing, and in particular to a test explosion relief device and a test box. Background Art

[0002] At present, the explosion-proof environmental test chambers used in the existing explosion-proof design mostly adopt top hinged flip explosion-proof covers, while the explosion-proof atmosphere test chambers used in the existing explosion-proof designs mostly adopt side hinged flip explosion-proof covers or explosion-proof membranes. According to the test requirements, these explosion-proof designs must not only ensure the sealing performance of the test chamber, but also ensure timely and automatic explosion-proofing during the test.

[0003] However, the existing hinged explosion-proof cover has the problem of poor sealing, which may easily cause external water vapor to enter the interior of the test box, or easily cause the leakage rate of the test box to be too large, so that the vacuum degree inside the test box cannot reach the target vacuum degree, thereby causing the test failure. Although the existing explosion-proof membrane has excellent sealing performance, it is not reusable, which significantly increases the test cost.

[0004] Therefore, the existing explosion-proof design cannot meet the requirements of users of explosion-proof environmental test chambers, explosive atmosphere test chambers and other test chambers for reusability and ensuring vacuum sealing.

[0005] There is an urgent need to develop a technology that can solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a test explosion relief device and a test box in view of the technical defects in the prior art.

[0007] To this end, the present invention provides a test explosion relief device, which includes a double-chain structure vacuum flap and a pneumatic pressing device;

[0008] Double-chain structure vacuum flap, which is installed on the pressure relief port of the test chamber to relieve pressure inside the test chamber;

[0009] A pneumatic pressing device is connected to the double-chain structure vacuum flap and is used to perform a pressing operation on the double-chain structure vacuum flap so that the sealing ring inside the double-chain structure vacuum flap is in a pressed state;

[0010] For the double-chain structure vacuum flap, it includes a bottom plate and a flap;

[0011] The flap is placed on top of the base plate;

[0012] The vertical through hole at the center of the bottom plate is located directly above the pressure relief port of the box body and is directly connected to the pressure relief port of the box body;

[0013] A sealing ring is arranged around the top edge of the bottom plate;

[0014] A first connecting plate is provided on the circumferential outer side of the flap;

[0015] A second connecting plate is provided at the bottom of the base plate;

[0016] One end of the first connecting plate away from the flap is hinged to one end of the arc-shaped third connecting plate;

[0017] The other end of the third connecting plate is hinged to an end of the second connecting plate away from the bottom plate.

[0018] In addition, the present invention also provides a test box, which includes the test explosion relief device as described above.

[0019] It can be seen from the technical solution provided by the present invention that, compared with the prior art, the present invention provides a test explosion relief device and a test chamber with a scientific structural design. The test explosion relief device can reliably meet the requirements of users of explosion-proof environmental test chambers, explosive atmosphere test chambers and other test chambers for reusability and ensuring vacuum sealing. It has excellent sealing effect and strong reusability, and has great practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of a test explosion relief device provided by the present invention;

[0021] Figure 2 A schematic diagram of the top view of the structure of a sealing ring in a test explosion relief device provided by the present invention;

[0022] Figure 3 For along Figure 2 A cross-sectional view of line AA shown;

[0023] Figure 4 for Figure 3 An enlarged schematic diagram of portion B is shown;

[0024] Figure 5 A front view of an installation state of a double-chain structure vacuum flap in a test explosion relief device provided by the present invention;

[0025] Figure 6 A bottom view of the installation state of a double-chain structure vacuum flap in a test explosion relief device provided by the present invention;

[0026] Figure 7 A schematic diagram of the structure of a pneumatic clamping device provided in a test explosion relief device provided by the present invention;

[0027] Figure 8 A schematic structural diagram of an explosion relief buffer mechanism provided in an experimental explosion relief device provided by the present invention;

[0028] Fig. 9 A schematic diagram of the three-dimensional structure of a test box provided by the present invention when a test explosion relief device is installed on the test box;

[0029] Fig.10 A front structural schematic diagram of a test box provided by the present invention when a test explosion relief device is installed;

[0030] In the figure: 1 is a sealing ring, 2 is a double-chain structure vacuum flap, 3 is a pneumatic clamping device, 4 is an explosion relief buffer mechanism, 5 is a box pressure relief port, and 6 is a connecting cover plate;

[0031] 101 is a lip, 102 is a groove;

[0032] 201 is a bottom plate, 202 is a flap, 203 is a first connecting plate, 204 is a second connecting plate, and 205 is a third connecting plate;

[0033] 301 is a pressure rod cylinder, 302 is a pressing arm, and 303 is a rubber pressing block;

[0034] 401 is a rubber pad, 402 is a rubber pad mounting seat, and 403 is a fixing plate;

[0035] 100 is the test explosion relief device, and 200 is the test box body. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] See also Figures 1 to 10 , the present invention provides a test explosion relief device, including a double-chain structure vacuum flap 2 and a pneumatic pressing device 3;

[0041] A double-chain structure vacuum flap 2, which is installed on the box body pressure relief port 5 of the test box, and is used to relieve pressure inside the test box;

[0042] It should be noted that the box body pressure relief port 5 is connected to the inside of the box body of the test box (ie, the test cavity with the vacuum degree requirement).

[0043] The pneumatic pressing device 3 is connected to the double-chain structure vacuum flap 2 and is used to perform a pressing operation on the double-chain structure vacuum flap 2 so that the sealing ring 1 in the double-chain structure vacuum flap 2 is in a pressed state;

[0044] For the double-chain structure vacuum flap 2, it includes a bottom plate 201 and a flap 202;

[0045] The flap 202 is placed on the top of the bottom plate 201;

[0046] The vertical through hole at the center of the bottom plate 201 is located directly above the box body pressure relief port 5 and is directly connected to the box body pressure relief port 5;

[0047] It should be noted that the lower part of the vertical through hole at the center of the bottom plate 201 is sealed and fixedly connected to the top of the box body pressure relief port 5 .

[0048] A sealing ring 1 is arranged around the top edge of the bottom plate 201;

[0049] A first connecting plate 203 is provided on the circumferential outer side of the flap 202;

[0050] A second connecting plate 204 is provided at the bottom of the bottom plate 201;

[0051] One end of the first connecting plate 203 away from the flap 202 is hinged to one end of the arc-shaped third connecting plate 205;

[0052] The other end of the third connecting plate 205 is hinged to an end of the second connecting plate 204 away from the bottom plate 201;

[0053] In the present invention, in specific implementation, the pneumatic clamping device 3 includes a vertically distributed clamping rod cylinder 301 and a horizontally distributed clamping arm 302;

[0054] The top of the compression rod cylinder 301 is connected to one end of the bottom of a connecting cover plate 6;

[0055] The bottom of the connecting cover plate 6 is fixedly connected to the top of the flap 202 in the double-chain structure vacuum flap 2;

[0056] The output end (i.e., piston rod) below the compression rod cylinder 301 and the top end of the compression arm 302;

[0057] The other end of the top of the clamping arm 302 is located directly below the bottom plate 201;

[0058] The clamping arm 302 is used to cooperate with the connecting cover plate 6 on the top of the pressure rod cylinder 301 under the drive of the pressure rod cylinder 301, so that the flap 202 in the double-chain structure vacuum flap 2 presses the bottom plate 201 downward.

[0059] It should be noted that, for the present invention, the double-chain structure vacuum flap designed by the present invention has flexible adjustment capability compared to the existing flap structure, ensuring that the flap 202 is parallel to the top surface (i.e., the sealing end surface) of the bottom plate 201. The double-chain structure vacuum flap uses a pin shaft as a hinge axis, and the flap 202 is a blind plate.

[0060] In specific implementation, an elastic rubber pressing block 303 is provided at the other end of the top of the pressing arm 302;

[0061] The rubber pressing block 303 is located directly below the bottom plate 201 .

[0062] It should be noted that the rubber pressing block 303 is helpful to avoid damage to the bottom surface of the bottom plate 201 when squeezing the bottom plate 201 .

[0063] For specific implementation, see Figure 1 As shown, the first connecting plate 203 and the rubber pressing block 303 in the double-chain structure vacuum flap 2 are respectively located on the left and right sides of the box body pressure relief port 5 .

[0064] It should be noted that the pressure rod cylinder 301 is specifically a rotary pressure rod cylinder.

[0065] In the present invention, in a specific implementation, when the flap 202 is placed on the top of the bottom plate 201, the first connecting plate 203 is horizontally distributed, the second connecting plate 204 is vertically distributed, and the horizontal center line of the first connecting plate 203 and the vertical center line of the second connecting plate 204 are perpendicular to each other.

[0066] In the present invention, for specific implementation, see Figure 2 , Figure 3 , Figure 4 As shown, a lip 101 is provided around the top edge of the sealing ring 1 and protrudes outward;

[0067] A concave groove 102 is circumferentially provided on the top of the sealing ring 1;

[0068] The inner side of the groove 102 is used to accommodate the bottom surface of the flap 202 .

[0069] In a specific implementation, the circumferential outer edge of the groove 102 is connected to the circumferential inner edge of the lip 101 .

[0070] It should be noted that the sealing ring 1 is a lip-shaped integrated sealing ring made of silicone with a temperature resistance range of -80 to 150 degrees Celsius. It is characterized by no gaps and a large elastic sealing capacity.

[0071] In the present invention, in a specific implementation, the test explosion relief device further includes an explosion relief buffer mechanism 4;

[0072] The explosion relief buffer mechanism 4 is connected to the end of the bottom of the connecting cover plate 6 away from the pneumatic clamping device 3, and is located just above the top of the test box;

[0073] The explosion relief buffer mechanism 4 is used to prevent the flap 202 from hitting the top of the test box when the double-chain structure vacuum flap 2 performs a pressure relief operation on the inside of the test box and the flap 202 is rotated open (ie turned over).

[0074] In specific implementation, the explosion relief buffer mechanism 4 includes a rubber pad 401, a rubber pad mounting seat 402 and a fixing plate 403;

[0075] The rubber pad 401 is installed at the lower end of the rubber pad mounting seat 402;

[0076] The rubber pad 401 is located directly above the top of the test box;

[0077] The top of the rubber pad mounting seat 402 is mounted on the bottom surface of the fixing plate 403;

[0078] The top surface of the fixing plate 403 is fixedly connected to an end of the bottom of the connecting cover plate 6 away from the pneumatic pressing device 3 .

[0079] It should be noted that the rubber pad 401 is a high-strength rubber pad with certain elasticity.

[0080] Based on the test explosion relief device 100 provided by the present invention, the present invention further provides a test box, which includes the test explosion relief device 100 as described above.

[0081] In a specific implementation, the test box includes a hollow test box body 200;

[0082] A box pressure relief port 5 is provided on the box wall of the test box box 200;

[0083] The box body pressure relief port 5 is connected to the test cavity (ie, the test cavity with vacuum degree requirement, used for test operation) inside the test box body 200 .

[0084] In the present invention, in a specific implementation, the test chamber is preferably an explosion-proof environment test chamber or an explosive atmosphere test chamber which is mature in the prior art and has been widely promoted and applied.

[0085] In order to more clearly understand the technical solution of the present invention, the working principle of the present invention is explained below.

[0086] For the present invention, before use, the double-chain structure vacuum flap 2 is manually restored to the closed state, and the double-chain structure vacuum flap 2 is compressed by the pneumatic clamping device 3 to ensure that the sealing ring 1 is in a compressed state, and then, the interior of the test box is vacuumed by the equipment vacuum system provided on the test box such as the explosion-proof environmental test box and the explosive atmosphere test box until the vacuum index inside the box is met. At this time, the pneumatic clamping device is opened to ensure that the explosion relief mechanism can work normally.

[0087] During the test, if an explosion occurs inside the test box or the internal pressure suddenly increases, the double-chain structure vacuum flap 2 will urgently open the flap 202 by rotating the flap 202 to relieve the pressure in the box. At the same time, the explosion relief buffer mechanism 4 will reduce the impact strength of the double-chain structure vacuum flap 2 on the top of the box, and can protect the double-chain structure vacuum flap 2 from being damaged due to force, so that it can be reused.

[0088] Compared with the prior art, the test explosion relief device and test box provided by the present invention have the following beneficial effects:

[0089] 1. The manufacturing cost of the present invention is relatively low, and it can be configured as a separate explosion-proof functional component for explosion-proof environmental test chambers, explosive atmosphere test chambers and other test chambers. If an explosion occurs inside the chamber or the internal pressure rises suddenly during the test, the double-chain structure vacuum flap will open urgently to relieve the pressure of the chamber. At the same time, the explosion-proof buffer mechanism will reduce the impact strength of the double-chain structure vacuum flap on the chamber, and can protect the double-chain structure vacuum flap from being damaged by force, so that it can be reused.

[0090] 2. The test explosion relief device provided by the present invention is a reusable flap-type test explosion relief device. Compared with the existing explosion relief devices, it has the advantages of excellent sealing effect and strong reusability.

[0091] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A test explosion relief device, characterized in that: It comprises a double-chain structure vacuum flap (2) and a pneumatic pressing device (3); A double-chain structure vacuum flap (2) is installed on the pressure relief port (5) of the test box to relieve the pressure inside the test box; A pneumatic pressing device (3) is connected to the double-chain structure vacuum flap (2) and is used to perform a pressing operation on the double-chain structure vacuum flap (2) so that the sealing ring (1) inside the double-chain structure vacuum flap (2) is in a pressed state; The double-chain structure vacuum flap (2) comprises a bottom plate (201) and a flap (202); The flap (202) is placed on top of the bottom plate (201); The vertical through hole at the center of the bottom plate (201) is located directly above the box body pressure relief port (5) and is directly connected to the box body pressure relief port (5); A sealing ring (1) is arranged around the top edge of the bottom plate (201); A first connecting plate (203) is provided on the circumferential outer side of the flap (202); A second connecting plate (204) is provided at the bottom of the bottom plate (201); One end of the first connecting plate (203) away from the flap (202) is hinged to one end of the arc-shaped third connecting plate (205); The other end of the third connecting plate (205) is hinged to an end of the second connecting plate (204) away from the bottom plate (201).

2. The test explosion relief device according to claim 1, characterized in that: The pneumatic pressing device (3) comprises a vertically distributed pressing rod cylinder (301) and a horizontally distributed pressing arm (302); The top of the pressure rod cylinder (301) is connected to one end of the bottom of a connecting cover plate (6); The bottom of the connecting cover plate (6) is fixedly connected to the top of the flap (202) in the double-chain structure vacuum flap (2); The output end below the compression rod cylinder (301) and the top end of the compression arm (302); The other end of the top of the clamping arm (302) is located directly below the bottom plate (201); The pressing arm (302) is used to cooperate with the connecting cover plate (6) on the top of the pressing rod cylinder (301) under the drive of the pressing rod cylinder (301), so that the flap (202) in the double-chain structure vacuum flap (2) presses the bottom plate (201) downward.

3. The test explosion relief device according to claim 1, characterized in that: The other end of the top of the clamping arm (302) is provided with an elastic rubber clamping block (303); The rubber pressing block (303) is located directly below the bottom plate (201).

4. The test explosion relief device according to claim 3, characterized in that: The first connecting plate (203) and the rubber pressing block (302) in the double-chain structure vacuum flap (2) are respectively located on the left and right sides of the box body pressure relief port (5).

5. The test explosion relief device according to claim 1, characterized in that: When the flap (202) is placed on top of the bottom plate (201), the first connecting plate (203) is horizontally distributed, the second connecting plate (204) is vertically distributed, and the horizontal center line of the first connecting plate (203) and the vertical center line of the second connecting plate (204) are perpendicular to each other.

6. The test explosion relief device according to claim 1, characterized in that: The top edge of the sealing ring (1) is surrounded by a lip edge (101) protruding outwards; A concave groove (102) is circumferentially arranged on the top of the sealing ring (1); The inner side of the groove (102) is used to accommodate the bottom surface of the flap (202).

7. The test explosion relief device according to claim 6, characterized in that: The circumferential outer edge of the groove (102) is connected to the circumferential inner edge of the lip (101).

8. The test explosion relief device according to claim 2, characterized in that: It also includes an explosion relief buffer mechanism (4); The explosion relief buffer mechanism (4) is connected to an end of the bottom of the connecting cover plate (6) away from the pneumatic clamping device (3), and is located directly above the top of the test box; The explosion relief buffer mechanism (4) is used to prevent the flap (202) from impacting the top of the test box when the double-chain structure vacuum flap (2) performs a pressure relief operation on the inside of the test box and the flap (202) is rotated to open.

9. The test explosion relief device according to claim 8, characterized in that: The explosion relief buffer mechanism (4) comprises a rubber pad (401), a rubber pad mounting seat (402) and a fixing plate (403); The rubber pad (401) is mounted on the lower end of the rubber pad mounting seat (402); The rubber pad (401) is located directly above the top of the test box; The top of the rubber pad mounting seat (402) is mounted on the bottom surface of the fixing plate (403); The top surface of the fixing plate (403) is fixedly connected to an end of the bottom of the connecting cover plate (6) away from the pneumatic pressing device (3).

10. A test box, characterized in that: The method comprises a test explosion relief device as claimed in any one of claims 1 to 9.

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