Anti-explosion camera shell negative pressure detection device

Abstract

The utility model discloses a negative pressure detection device for an explosion-proof camera shell. The negative pressure detection device comprises a front end cover, a rear end cover and a middle body, the front end cover and the rear end cover are located at two ports of the middle body respectively, the middle body is of a columnar structure, the middle body is a containing cavity, and the containing cavity is communicated with the two ports of the middle body. The front end cover is provided with two through holes which are respectively a first through hole and a second through hole, and the first through hole and the second through hole are respectively provided with a detection joint. The device has the characteristics of simple structure, convenience in installation and good detection effect.

Description

Technical Field

[0001] The utility model relates to the field of detection devices, in particular to a negative pressure detection device for an explosion-proof camera housing. Background Art

[0002] Explosion-proof cameras are monitoring equipment designed for high-risk flammable and explosive sites. Explosion-proof cameras are widely used in the fields of petroleum, chemical, coal, scientific research, military, etc. to monitor flammable and explosive substances and prevent explosion accidents.

[0003] It is very important to test the air tightness and sealing of the explosion-proof camera housing to ensure that when the camera is working in a flammable, explosive and other high-risk environment, the internal electronic components will not be damaged by the intrusion of external gas or liquid, thereby avoiding safety accidents. Prevent dust, water vapor, etc. from entering the camera to affect its imaging quality and normal operation, and ensure that the camera can provide clear images stably for a long time. Good air tightness and sealing can extend the service life of the camera and reduce the cost of repair and replacement due to environmental factors.

[0004] Currently, most of the explosion-proof camera housing detection devices available on the market are positive pressure detection. The detection equipment is complex and the equipment cost is high. The system design provided is complex and requires professional design and maintenance, which has certain technical difficulties. Currently, a negative pressure detection device for the explosion-proof camera housing has not been found. Summary of the invention

[0005] The utility model aims to provide a negative pressure detection device for an explosion-proof camera housing.

[0006] The utility model solves the problem that there is a lack of explosion-proof camera housing negative pressure detection devices in the market.

[0007] The technical solution adopted by the utility model to solve its technical problems is: the utility model comprises a front end cover, a rear end cover and an intermediate body; the front end cover and the rear end cover are respectively located at two ends of the intermediate body, the intermediate body is a columnar structure, and the middle is a containing cavity, and the containing cavity is communicated with the two ends of the intermediate body; the front end cover is provided with two through holes, which are a first through hole and a second through hole, and detection connectors are respectively installed at the first through hole and the second through hole.

[0008] Furthermore, a first connecting member is provided on the outer side of the front end cover at the first through-hole, and the first connecting member is an annular columnar structure. A first guide block and a second connecting member are installed inside the first connecting member, and the outer side wall of the second connecting member is threadedly connected to the inner wall of the first connecting member. A part of the second connecting member is installed inside the first connecting member, and the other part is exposed to the outside.

[0009] Furthermore, a first conducting hole is provided in the middle of the first guide block, and the first conducting hole is communicated with the outside; sealing gaskets are provided on both end surfaces of the first guide block; the interior of the second connecting member is a conducting groove, one end of the conducting groove is an open end, and the other end is a closed end; the open end is communicated with the conducting hole; and an air inlet and a detection port are provided on the side wall of the second connecting member exposed to the outside of the first connecting member.

[0010] Furthermore, the air inlet and the detection port are both connected to the conduction groove; a throttle valve is installed at the air inlet, one end of the high-pressure air inlet inside the throttle valve is connected to the air inlet, and the other end is connected to the air compressor; the detection port is connected to a pressure gauge.

[0011] Furthermore, a third connecting member is provided on the outer side of the front end cover at the second through hole, and the third connecting member is an annular columnar structure, and a second guide block and a fourth connecting member are installed inside the third connecting member, and the outer side wall of the fourth connecting member is threadedly connected to the inner wall of the third connecting member.

[0012] Furthermore, a second conducting hole is provided in the middle of the second guide block, and the second conducting hole is communicated with the outside; sealing gaskets are provided on both end surfaces of the second guide block; and a channel is provided in the middle of the fourth connecting member, which communicates the front and rear end surfaces.

[0013] Furthermore, a conduit is provided in the channel on the fourth connecting member, and the conduit passes through the channel, the second conducting hole and the second through hole and extends to the accommodating cavity of the intermediate body, and the conduit is in close contact with the sealing gasket.

[0014] Furthermore, the accommodating cavity of the intermediate body is a high-pressure sealed cabin.

[0015] The beneficial effects of the utility model are: compared with the prior art, the utility model has the following advantages:

[0016] 1. The overall structure of the utility model is simple and easy to install and maintain.

[0017] 2. The utility model can timely discover the sealing problem of the shell during the detection process, the detection process is safe, and the detection effect is good.

[0018] 3 The utility model helps to maintain the stability of the internal environment of the shell, reduce equipment failures caused by environmental factors, and thus extend the service life of the explosion-proof camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the utility model.

[0020] Figure 2 It is a side schematic diagram of the utility model.

[0021] Figure 3 It is a schematic diagram of the use state of the utility model.

[0022] In the figure: 1. rear end cover; 2. intermediate body; 20. accommodating chamber; 3. front end cover; 30. first through hole; 31. second through hole; 4. first connecting piece; 5. first guide block; 50. first conducting hole; 6. sealing gasket; 7. throttle valve; 8. second connecting piece; 80. air inlet; 81. detection port; 82. conducting groove; 9. conduit; 10. fourth connecting piece; 100. channel; 11. third connecting piece; 12. second guide block; 120. second conducting hole. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 , 2 As shown, the utility model provides a negative pressure detection device for explosion-proof camera housing, which mainly generates and maintains a negative pressure environment and performs an airtightness test on the explosion-proof camera housing. The device includes a front cover 3, a rear cover 1 and an intermediate body 2. The front cover 3 and the rear cover 1 are respectively located at the two ends of the intermediate body 2, and the intermediate body 2 is a columnar structure with a receiving chamber 20 in the middle. The receiving chamber 20 is connected to the two ends of the intermediate body 2. The receiving chamber 20 of the intermediate body 2 is a high-pressure sealed cabin, and high-pressure gas will enter here. The receiving chamber 20 serves as the main detection space, and the explosion-proof camera housing is mainly placed here. Two perforations are provided on the front cover 3, namely a first perforation 30 and a second perforation 31, and detection connectors are respectively installed at the first perforation 30 and the second perforation 31. The detection connector is used to connect various detection instruments, valve bodies, etc.

[0025] A first connecting member 4 is provided on the outer side of the front end cover 3 at the first through hole 30. The first connecting member 4 is an annular columnar structure. A first guide block 5 and a second connecting member 8 are installed inside the first connecting member 4. The outer side wall of the second connecting member 8 is threadedly connected to the inner side wall of the first connecting member 4. Figure 1 As shown, a portion of the second connecting member 8 is installed in the first connecting member 4, and the other portion is exposed to the outside.

[0026] A first conducting hole 50 is provided in the middle of the first guide block 5, and the first conducting hole 50 is communicated with the outside; sealing gaskets 6 are provided at both end surfaces of the first guide block 5 to ensure that there is no leakage during the detection process, and a through hole is provided in the middle of the sealing gasket 6. The interior of the second connecting member 8 is a conducting groove 82, one end of the conducting groove 82 is an open end, and the other end is a closed end; the open end is communicated with the conducting hole 50.

[0027] The side wall of the second connecting member 8 exposed outside the first connecting member 4 is provided with an air inlet 80 and a detection port 81. The air inlet 80 and the detection port 81 are both connected to the conduction groove 82. The throttle valve 7 is installed at the air inlet 80, and one end of the high-pressure air inlet inside the throttle valve 7 is connected to the air inlet 80, and the other end is connected to the air compressor. The detection port 81 is connected to a pressure gauge.

[0028] A third connecting member 11 is provided on the outer side of the front end cover 3 at the second through hole 31. The third connecting member 11 is an annular columnar structure. A second guide block 12 and a fourth connecting member 10 are installed inside the third connecting member 11. The outer side wall of the fourth connecting member 10 is threadedly connected to the inner wall of the third connecting member 11.

[0029] A second conducting hole 120 is provided in the middle of the second guide block 12, and the second conducting hole 120 communicates with the outside. Sealing gaskets 6 are also provided on both end surfaces of the second guide block 12. A channel 100 communicating with the front and rear end surfaces is provided in the middle of the fourth connecting member 10.

[0030] A conduit 9 is provided in the channel 100 on the fourth connector 10, and the conduit 9 extends through the channel 100, the second conducting hole 120 and the second through hole 31 to the receiving chamber 20 of the intermediate body. The conduit 9 cooperates with the sealing gasket 6 to ensure that the connection is tight and leak-free.

[0031] like Figure 3 As shown, the use of the utility model is as follows: before testing, the explosion-proof housing to be tested is placed in the high-pressure sealed cabin of the intermediate body 2. Then, the high-pressure air of the calibrated pressure is injected into the high-pressure sealed cabin through the second connecting piece 8, the first connecting piece 4, and the first perforated pipe 30 through the throttle valve 7, and then the throttle valve is closed. The test port 81 is connected to a pressure gauge to confirm whether the pressure meets the calibrated value.

[0032] Since the inside of the explosion-proof housing under test is connected to the outside air by the conduit 9 (low-pressure exhaust pipe), if there is a leak in the housing, the pressure on the test gauge will decrease, otherwise the pressure value is stable.

Claims

1. A negative pressure detection device for an explosion-proof camera housing, comprising a front cover, a rear cover and an intermediate body; the front cover and the rear cover are respectively located at two ends of the intermediate body, the intermediate body is a columnar structure, the middle of which is a receiving cavity, and the receiving cavity is communicated with the two ends of the intermediate body; characterized in that The front end cover is provided with two through holes, namely a first through hole and a second through hole, and detection connectors are respectively installed at the first through hole and the second through hole.

2. The explosion-proof camera housing negative pressure detection device according to claim 1, characterized in that A first connecting member is provided at the first through-hole located on the outer side of the front end cover. The first connecting member is an annular columnar structure. A first guide block and a second connecting member are installed inside the first connecting member. The outer side wall of the second connecting member is threadedly connected to the inner wall of the first connecting member. A part of the second connecting member is installed inside the first connecting member, and the other part is exposed to the outside.

3. The explosion-proof camera housing negative pressure detection device according to claim 2, characterized in that A first conducting hole is provided in the middle of the first guide block, and the first conducting hole is communicated with the outside; sealing gaskets are provided on both end surfaces of the first guide block; the interior of the second connecting member is a conducting groove, one end of the conducting groove is an open end, and the other end is a closed end; the open end is communicated with the conducting hole; an air inlet and a detection port are provided on the side wall of the second connecting member exposed outside the first connecting member.

4. The explosion-proof camera housing negative pressure detection device according to claim 3, characterized in that The air inlet and the detection port are both connected to the conduction groove; a throttle valve is installed at the air inlet, one end of the high-pressure air inlet inside the throttle valve is connected to the air inlet, and the other end is connected to the air compressor; the detection port is connected to a pressure gauge.

5. The explosion-proof camera housing negative pressure detection device according to claim 1, characterized in that The second through hole is located on the outer side of the front end cover and a third connecting piece is provided. The third connecting piece is an annular columnar structure. The second guide block and the fourth connecting piece are installed inside the third connecting piece. The outer side wall of the fourth connecting piece is threadedly connected to the inner wall of the third connecting piece.

6. The explosion-proof camera housing negative pressure detection device according to claim 5, characterized in that A second conducting hole is provided in the middle of the second guide block, and the second conducting hole is communicated with the outside; sealing gaskets are provided on both end surfaces of the second guide block; and a channel is provided in the middle of the fourth connecting member, where the front and rear end surfaces communicate with each other.

7. The explosion-proof camera housing negative pressure detection device according to claim 6, characterized in that A conduit is provided in the channel on the fourth connecting member. The conduit passes through the channel, the second conducting hole and the second through hole and extends to the accommodating cavity of the intermediate body. The conduit is in close contact with the sealing gasket.

8. The explosion-proof camera housing negative pressure detection device according to claim 1, characterized in that The accommodating cavity of the intermediate body is a high-pressure sealed cabin.

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