Test explosion venting device and test box

Abstract

The utility model 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. The test explosion venting device and the test box disclosed by the utility model are scientific in structural design, the test explosion venting device can reliably meet the requirements of users of test boxes such as an explosion-proof environment test box, an explosive atmosphere test box and the like on reusability and vacuum sealing performance guarantee, the sealing effect is excellent, the reusability is strong, and the test box is convenient to use. The method has great practical significance.

Description

Technical Field

[0001] The utility model relates to the technical fields of environmental testing and atmospheric testing, and particularly relates to a test explosion venting device and a test chamber. Background Art

[0002] At present, for existing explosion-proof environmental test chambers, most of the explosion venting designs adopted are top-hinged flip-up explosion vent covers, and for existing explosive atmosphere test chambers, most of the explosion venting designs adopted are side-hinged flip-up explosion vent covers or explosion vent membranes. According to the requirements of the test, these explosion venting designs should not only ensure the sealing performance of the test chamber, but also ensure timely automatic explosion venting during the test process.

[0003] However, the existing above-mentioned hinged explosion vent covers have the problem of poor sealing, which is likely to cause external water vapor to enter the interior of the test chamber body, or is likely to cause the leakage rate of the test chamber to be too large, resulting in the vacuum degree inside the test chamber unable to reach the target vacuum degree, and further leading to test failure. Although the existing explosion vent membranes have excellent sealing performance, due to their non-reusability, the test cost is significantly increased.

[0004] Therefore, the existing explosion venting designs cannot meet the requirements of reusability and ensuring vacuum tightness put forward by users of test chambers such as explosion-proof environmental test chambers and explosive atmosphere test chambers.

[0005] At present, there is an urgent need to develop a technology that can solve the above technical problems. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a test explosion venting device and a test chamber in view of the technical defects existing in the prior art.

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

[0008] The double-chain structure vacuum flap is installed on the pressure relief opening of the test chamber body and is used for performing a pressure relief operation on the interior of the test chamber;

[0009] The pneumatic pressing device is connected to the double-chain structure vacuum flap and is used for performing 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 the top of the bottom plate;

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

[0013] A sealing ring is disposed around the top four peripheral edges of the bottom plate;

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

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

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

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

[0018] In addition, the present utility model further provides a test chamber, which includes the test explosion relief device as described above.

[0019] As can be seen from the technical solutions provided by the present utility model above, compared with the prior art, the present utility model 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 repeatable use and ensuring vacuum tightness put forward by users of test chambers such as explosion-proof environmental test chambers and explosive atmosphere test chambers, has an excellent sealing effect, strong reusability, and has great practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an overall structural schematic diagram of a test explosion relief device provided by the present utility model;

[0021] Figure 2 is a top view structural schematic diagram of the sealing ring in a test explosion relief device provided by the present utility model;

[0022] Figure 3 is a sectional view along Figure 2 the A-A line shown;

[0023] Figure 4 is Figure 3 an enlarged schematic diagram of part B shown;

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

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

[0026] Figure 7 is a structural schematic diagram of a pneumatic pressing device in a test explosion relief device provided by the present utility model;

[0027] Figure 8Schematic structural diagram of an explosion venting buffer mechanism in a test explosion venting device provided by the present utility model;

[0028] Figure 9 Stereoscopic structural diagram of a test chamber when a test explosion venting device is installed thereon, provided by the present utility model;

[0029] Figure 10 Front structural diagram of a test chamber when a test explosion venting device is installed thereon, provided by the present utility model;

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

[0031] 101 is a lip, and 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 pressing 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 a test explosion venting device, and 200 is a test chamber box body. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0038] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, 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 only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "a plurality of" means two or more unless otherwise clearly and specifically defined.

[0040] See Figures 1 to 10 , this utility model provides a test explosion relief device, which includes a double-chain structure vacuum flap 2 and a pneumatic pressing device 3;

[0041] The double-chain structure vacuum flap 2 is installed on the pressure relief opening 5 of the box body of the test chamber for performing pressure relief operations on the interior of the test chamber;

[0042] It should be noted that the pressure relief opening 5 of the box body is connected to the interior of the box body of the test chamber (i.e., the test cavity with vacuum requirements).

[0043] The pneumatic pressing device 3 is connected to the double-chain structure vacuum flap 2 for performing 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;

[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 central position of the bottom plate 201 is directly above the pressure relief opening 5 of the box body and is directly connected and communicated with the pressure relief opening 5 of the box body;

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

[0048] The sealing ring 1 is disposed around the top peripheral edge of the bottom plate 201;

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

[0050] The second connecting plate 204 is disposed 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 one end of the second connecting plate 204 away from the bottom plate 201;

[0053] In the present utility model, specifically, for the pneumatic pressing device 3, it includes a vertically distributed pressure rod cylinder 301 and a horizontally distributed pressing arm 302;

[0054] The top of the pressure 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., the piston rod) below the pressure rod cylinder 301 and one end of the top of the pressing arm 302;

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

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

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

[0060] Specifically, 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 through the rubber pressing block 303, it is beneficial to avoid damaging the bottom surface of the bottom plate 201 when pressing the bottom plate 201.

[0063] Specifically, as shown in Figure 1 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 relief port 5.

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

[0065] In the present utility model, specifically in 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 is perpendicular to the vertical center line of the second connecting plate 204.

[0066] In the present utility model, specifically in implementation, refer to Figure 2 、 Figure 3 、 Figure 4 As shown, a lip 101 is circumferentially and outwardly protruded around the top peripheral edge of the sealing ring 1;

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

[0068] Inside the groove 102 is for accommodating the bottom surface of the flap 202.

[0069] Specifically in 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 silica gel, with a temperature resistance range of -80 to 150, and its characteristics are seamless and large elastic sealing amount.

[0071] In the present utility model, specifically in implementation, the test explosion venting device further includes an explosion venting buffer mechanism 4;

[0072] The explosion venting buffer mechanism 4 is connected to one end of the bottom of the connection cover plate 6 far from the pneumatic pressing device 3, and is located directly above the top of the test chamber body;

[0073] The explosion venting buffer mechanism 4 is used to prevent the flap 202 from hitting the top of the test chamber body when the double-chain structure vacuum flap 2 vents the inside of the test chamber and causes the flap 202 to rotate and open (i.e., flip).

[0074] Specifically in implementation, the explosion venting 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 chamber body;

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

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

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

[0080] Based on the test explosion relief device 100 provided by the above-mentioned utility model, the utility model 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 wall of the test box body 200;

[0083] The box body pressure relief port 5 is connected to the test cavity (ie, the test cavity with vacuum requirements, used for performing test operations) 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 that is mature in existing technology 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 described below.

[0086] For the utility model, 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. Then, the interior of the test box is vacuumed by the equipment vacuum system 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 rises suddenly, 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 utility model have the following beneficial effects:

[0089] 1. The manufacturing cost of the utility model is relatively low. It can be configured as a separate explosion relief functional component for test chambers such as explosion-proof environmental test chambers and explosive atmosphere test chambers. If an explosion occurs inside the chamber or the internal pressure suddenly rises during the test, the double-chain structure vacuum flap will open emergently to relieve the pressure of the chamber. At the same time, the explosion relief 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, meeting the requirement of repeated use.

[0090] 2. The test explosion relief device provided by the utility model 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 are only the preferred embodiments of the utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. An experimental explosion relief device, characterized in that, It includes a double-chain structure vacuum flap (2) and a pneumatic pressing device (3); The double-chain structure vacuum flap (2) is installed on the box body pressure relief port (5) of the test chamber and is used for performing a pressure relief operation on the interior of the test chamber; The pneumatic pressing device (3) is connected to the double-chain structure vacuum flap (2) and is used for performing 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; For the double-chain structure vacuum flap (2), it includes a bottom plate (201) and a flap (202); The flap (202) is placed on the top of the bottom plate (201); The vertical through hole at the center position of the bottom plate (201) is 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 peripheral edge of the bottom plate (201); A first connecting plate (203) is arranged on the circumferential outer side of the flap (202); A second connecting plate (204) is arranged at the bottom of the bottom plate (201); One end of the first connecting plate (203) far from the flap (202) is hinged to one end of an arc-shaped third connecting plate (205); The other end of the third connecting plate (205) is hinged to the end of the second connecting plate (204) far from the bottom plate (201).

2. The test explosion venting device according to claim 1, wherein, For the pneumatic pressing device (3), it includes a vertically distributed pressure rod cylinder (301) and a horizontally distributed pressing arm (302); The top of the pressure rod cylinder (301) is connected to the bottom end of a connecting cover plate (6); The bottom of this 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 pressure rod cylinder (301) is connected to the top end of the pressing arm (302); The other top end of the pressing arm (302) is located directly below the bottom plate (201); The pressing arm (302) is used, under the drive of the pressure rod cylinder (301), to cooperate with the connecting cover plate (6) at the top of the pressure rod cylinder (301) to press the flap (202) in the double-chain structure vacuum flap (2) downward against the bottom plate (201).

3. The test explosion venting device according to claim 1, characterized in that, An elastic rubber pressing block (303) is arranged at the other top end of the pressing arm (302); This rubber pressing block (303) is located directly below the bottom plate (201).

4. The test explosion venting device according to claim 3, characterized in that, 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).

5. The test explosion venting device according to claim 1, characterized in that, 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) is perpendicular to the vertical center line of the second connecting plate (204).

6. The test explosion venting device according to claim 1, characterized in that, A circle of lips (101) protrudes outward around the top peripheral edge of the sealing ring (1); A concave groove (102) is arranged around 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 venting 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 lips (101).

8. The test explosion venting device according to claim 2, characterized in that, It further includes an explosion relief buffer mechanism (4); The explosion relief buffer mechanism (4) is connected to one end of the bottom of the connection cover plate (6) away from the pneumatic pressing device (3), and is located directly above the top of the test chamber body; The explosion relief buffer mechanism (4) is used to prevent the flap (202) from hitting the top of the test chamber body when the double-chain structure vacuum flap (2) relieves pressure inside the test chamber and causes the flap (202) to rotate and open.

9. The test explosion venting device according to claim 8, characterized in that, The explosion relief buffer mechanism (4) includes a rubber pad (401), a rubber pad mounting seat (402), and a fixing plate (403); The rubber pad (401) is installed at the lower end of the rubber pad mounting seat (402); The rubber pad (401) is located directly above the top of the test chamber body; The top of the rubber pad mounting seat (402) is installed on the bottom surface of the fixing plate (403); The top surface of the fixing plate (403) is fixedly connected to one end of the bottom of the connection cover plate (6) away from the pneumatic pressing device (3).

10. A test chamber, characterized in that, It includes the test explosion relief device according to any one of claims 1 to 9.

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