An air duct explosion-proof device for a saturated pressure chamber

Abstract

This application relates to an explosion-proof device for air ducts in a saturation pressure chamber, belonging to the field of saturation pressure chamber safety equipment. It includes a chamber body and an explosion-proof component. The chamber body is provided with a connection port for connecting the air duct, and the explosion-proof component includes a first mounting part, a second compression ring, etc., which are used to provide explosion-proof protection at the connection port. Through a unique structural design, this device realizes effective explosion-proof protection at the connection port of the pressure chamber, improving the safety performance of the equipment.

Description

Technical Field

[0001] This application relates to the field of safety equipment for saturation pressure chambers, and particularly to an explosion-proof device for air ducts used in saturation pressure chambers. Background Art

[0002] Deep saturation diving operations refer to long-term diving work where divers are directly exposed to depths exceeding 120 meters underwater. In this type of operation, divers first need to stay in a high-pressure environment chamber for a long time to adapt to the high-pressure environment at great depths underwater. Subsequently, they directly enter and exit the deep underwater to carry out work, with the duration lasting up to 1 month. Through diving medicine, it is known that the gas in such high-pressure environment chambers is generally composed of a mixture of helium, oxygen, and small amounts of carbon dioxide, water, and nitrogen. The pressure inside the chamber generally exceeds 120 atmospheres according to requirements (even up to 300 - 500 meters). When divers adapt to the high-pressure environment and rest in the high-pressure environment chamber, they need to intake oxygen and exhale carbon dioxide to maintain their own health needs; the environmental control machine is a device that realizes functions such as temperature control, harmful gas removal, dehumidification, etc. inside the high-pressure environment chamber.

[0003] The air inlet and air return port of the existing environmental control machine are connected to the chamber body through pipelines, and the environmental control machine forcibly pumps air into and out of the chamber, thereby realizing functions such as temperature control, harmful gas removal, dehumidification, etc. for the passing gas.

[0004] Due to the relatively high pressure inside the chamber body, and at the connection positions between the air inlet pipe and the air outlet pipe of the environmental control machine and the chamber body, communication ports need to be opened. Therefore, stress concentration occurs at the communication ports, and it is easy to burst under high-pressure environments, causing significant losses. Summary of the Invention

[0005] In order to prevent the bursting of the communication ports of the chamber body, this application provides an explosion-proof device for air ducts used in saturation pressure chambers, adopting the following technical solutions:

[0006] An explosion-proof device for air ducts used in saturation pressure chambers includes a chamber body, and two connection ports for connecting air ducts are opened on the chamber body;

[0007] And an explosion-proof component for explosion-proof at the connection ports. The explosion-proof component includes a first mounting member and a second pressing ring. The first mounting member includes an air pipe with one end inserted into the connection port. A fitting ring that fits with the inner wall of the chamber body is fixed at the end of the air pipe located inside the chamber body, and the other end is connected to the air duct; the second pressing ring is sleeved on the air pipe and fits with the outer peripheral wall of the chamber body, and the second pressing ring is detachably and fixedly connected to the air pipe.

[0008] By adopting the above technical solution, the personnel push the trachea out of the cabin body from the inside of the cabin body, so that the fitting ring fits against the inner wall of the cabin body. Subsequently, the second pressing ring is sleeved on the trachea from outside the cabin body. After the second pressing ring fits against the outer wall of the cabin body, the second pressing ring is fixed to the trachea, so that the cabin wall near the connection port is clamped between the second pressing ring and the fitting ring, improving the pressure-bearing capacity of the cabin wall at the connection port.

[0009] Optionally, a plurality of reinforcing rods are provided on one side of the second pressing ring close to the outer side wall of the cabin body. The plurality of reinforcing rods are circumferentially distributed with the axis of the trachea as the center line. A plurality of first insertion holes are circumferentially formed in the outer peripheral wall of the cabin body with the axis of the trachea as the center line. The reinforcing rods are inserted into the first insertion holes.

[0010] By adopting the above technical solution, when the cabin wall at the connection port is subjected to a radial stress with the connection port as the center of the circle, the reinforcing rods share the stress to the second pressing ring, reducing the pressure borne by the cabin wall.

[0011] Optionally, the first insertion holes penetrate through the wall thickness of the cabin body, and a plurality of second insertion holes are formed on one side of the fitting ring close to the inner wall of the cabin body. Each of the second insertion holes corresponds to each of the second insertion holes one by one, and the reinforcing rods are inserted into the second insertion holes.

[0012] By adopting the above technical solution, the fitting ring, the second pressing ring and the cabin wall are stressed simultaneously.

[0013] Optionally, a third mounting ring is further provided between the cabin body and the second pressing ring. A plurality of third insertion holes are formed in the third mounting ring. One of the third insertion holes is used to communicate one of the first insertion holes and one of the second insertion holes;

[0014] An extrusion cavity is formed inside the third mounting ring. The extrusion cavity is communicated with the third insertion holes. A plurality of first ventilation holes are formed on the circumferential side of the trachea. The extrusion cavity is communicated with the first ventilation holes. A sliding groove coaxial with the third insertion hole is formed on one side of the extrusion cavity close to the cabin body. One sliding groove is formed at each of the third insertion holes. A sliding ring that slides in the sliding groove is sleeved on each of the reinforcing rods. The circumferential wall of the sliding ring abuts against the circumferential wall of the sliding groove. A sliding cavity is formed by the side of the sliding ring away from the second pressing ring, the side wall of the sliding groove and the circumferential wall of the reinforcing rod. An exhaust passage is formed on the reinforcing rod. One end of the exhaust passage is communicated with the sliding cavity, and the other end is communicated with the outside;

[0015] A certain tolerance is left in the connection manner between the second pressing ring and the trachea so that the second pressing ring can slide along the axis of the trachea on the trachea.

[0016] By adopting the above technical solution, when the air pressure in the cabin rises, the air pressure in the extrusion chamber rises. Since the air pressure in the sliding chamber is connected to the outside, the sliding ring will slide towards the side where the volume of the sliding chamber becomes smaller, thereby driving the second pressing ring to slide towards the cabin side, so that the third mounting ring is pressed against the side wall of the cabin. Therefore, when there is pressure in the cabin, the second pressing ring is always subjected to the extrusion force moving towards the cabin, ensuring that the second pressing ring will not loosen.

[0017] Optionally, a sealing ring is embedded on the circumferential side of the sliding ring.

[0018] By adopting the above technical solution, it is possible to prevent the pressure in the cabin from decreasing due to the gap between the sliding ring and the sliding groove.

[0019] Optionally, a second ventilation hole communicating with the first ventilation hole is opened on the inner side wall of the extrusion chamber. A connecting pipe is provided at the second ventilation hole. The circumferential wall of the connecting pipe abuts against the side wall of the second ventilation hole, and the connecting pipe elastically slides along the axis direction of the second ventilation hole in the second ventilation hole. In the normal state, one end of the connecting pipe is located in the extrusion chamber, and the other end is located in the first ventilation hole.

[0020] By adopting the above technical solution, when installing the third mounting ring, the operator presses the connecting pipe into the third mounting ring, and then slews the third mounting ring onto the air pipe and slides it towards the cabin. When the third mounting ring abuts against the cabin, the connecting pipe automatically pops out and inserts into the first ventilation hole. The connecting pipe seals the gap between the third mounting ring and the air pipe at the first ventilation hole.

[0021] Optionally, an infrared emitter and an infrared receiver for receiving the light source emitted by the infrared emitter are installed in the exhaust passage. The infrared receiver transmits the received signal to an external controller in real time through a wireless signaler.

[0022] By adopting the above technical solution, when the cabin wall changes and causes the reinforcement rod to bend, and the infrared receiver cannot receive the infrared rays emitted by the infrared emitter, this information is sent to the controller through the wireless signaler, and the controller then sends this signal to external personnel through sound and light.

[0023] Optionally, a pressure relief valve communicating with the extrusion chamber is installed on the third mounting ring, and the pressure relief valve is controlled by a controller.

[0024] By adopting the above technical solution, after the infrared receiver transmits the signal to the controller, the controller judges and controls the pressure relief valve to relieve pressure in time to prevent further explosion. Description of the Drawings

[0025] Figure 1It is a schematic diagram of the overall structure of an explosion-proof device for an air duct of a saturation pressure chamber according to an embodiment of the present application;

[0026] Figure 2 It is a cross-sectional view of an explosion-proof device for an air duct of a saturation pressure chamber according to an embodiment of the present application;

[0027] Figure 3 It is Figure 2 An enlarged schematic view of part A.

[0028] Reference numerals: 01, environmental control machine; 02, air duct; 1, cabin body; 11, connection port; 12, first insertion hole; 2, explosion-proof component; 21, first mounting member; 211, air pipe; 2111, first ventilation hole; 212, fitting ring; 2121, second insertion hole; 22, second pressing ring; 221, fixing ring; 222, reinforcing rod; 2221, exhaust passage; 223, sliding ring; 224, sealing ring; 225, sliding cavity; 23, third mounting ring; 231, third insertion hole; 232, extrusion cavity; 233, sliding groove; 234, second ventilation hole; 235, connecting pipe; 24, infrared emitter; 25, infrared receiver; 26, pressure relief valve. Detailed implementation manners

[0029] The following Figures 1 - 3 Further detailed description will be made on the present application.

[0030] An embodiment of the present application discloses an explosion-proof device for an air duct of a saturation pressure chamber.

[0031] Referring to Figure 1 , Figure 2 and Figure 3 , an explosion-proof device for an air duct of a saturation pressure chamber includes a cabin body 1 and an explosion-proof component 2. A connection port 11 for connecting with the air duct of the environmental control machine is opened on the cabin body 1. In the present application, the cabin body 1 is a cylindrical cabin body 1, and the connection port 11 is opened on the peripheral wall;

[0032] The explosion-proof component 2 is installed at the connection port 11 for preventing the connection port 11 from bursting. The explosion-proof component 2 includes a first mounting member 21 and a second pressing ring 22. The first mounting member 21 includes an air pipe 211 with one end inserted into the connection port 11. A fitting ring 212 that fits with the inner wall of the cabin body 1 is fixed at one end of the air pipe 211 located inside the cabin body 1, and the other end is connected to the air duct. In the present application, flange connection is adopted; the second pressing ring 22 is sleeved on the air pipe 211 and fits with the outer peripheral wall of the cabin body 1, and the second pressing ring 22 is detachably and fixedly connected to the air pipe 211;

[0033] The personnel push the trachea 211 out of the cabin body 1 from the inside of the cabin body 1, so that the fitting ring 212 fits against the inner wall of the cabin body 1. Subsequently, the second pressing ring 22 is sleeved on the trachea 211 from outside the cabin body 1. After the second pressing ring 22 fits against the outer wall of the cabin body 1, the second pressing ring 22 is fixed to the trachea 211, so that the cabin wall of the cabin body 1 near the connection port 11 is clamped between the second pressing ring 22 and the fitting ring 212, improving the pressure-bearing capacity of the cabin wall of the cabin body 1 at the connection port 11.

[0034] Referring to Figure 3 , in the present application, a fixing ring 221 is fixed on the second pressing ring 22, and the fixing ring 221 and the trachea 211 are fixed by bolts.

[0035] Referring to Figure 3 , in order to improve the radial pressure-bearing capacity of the cabin wall at the connection port 11 with the connection port 11 as the center, a plurality of reinforcing rods 222 are provided on one side of the second pressing ring 22 close to the outer side wall of the cabin body 1. The plurality of reinforcing rods 222 are circumferentially distributed with the axis of the trachea 211 as the center line. In the present application, the number of the reinforcing rods 222 is preferably six. A plurality of first insertion holes 12 are circumferentially formed on the outer peripheral wall of the cabin body 1 with the axis of the trachea 211 as the center line, and the reinforcing rods 222 are inserted into the first insertion holes 12;

[0036] In this way, when the cabin wall at the connection port 11 is subjected to radial stress with the connection port 11 as the center, the stress is shared to the second pressing ring 22 through the reinforcing rods 222, reducing the pressure borne by the cabin wall.

[0037] Referring to Figure 3 , to further improve the radial pressure-bearing capacity of the cabin wall at the connection port 11 with the connection port 11 as the center, the first insertion holes 12 penetrate through the wall thickness of the cabin body 1, and a plurality of second insertion holes 2121 are formed on one side of the fitting ring 212 close to the inner wall of the cabin body 1. Each second insertion hole 2121 corresponds to each second insertion hole 2121 one by one, and the reinforcing rods 222 are inserted into the second insertion holes 2121;

[0038] So that the fitting ring 212, the second pressing ring 22 and the cabin wall are stressed simultaneously.

[0039] Referring to Figure 3 , during the use of the cabin body 1, the vibration of the machine body will cause the connection between the second pressing ring 22 and the cabin body 1 to gradually loosen. To prevent this phenomenon from occurring, the explosion-proof device further includes a third mounting ring 23 provided between the cabin body 1 and the second pressing ring 22. A plurality of third insertion holes 231 are formed on the third mounting ring 23, and one third insertion hole 231 is used to communicate one first insertion hole 12 with one second insertion hole 2121;

[0040] An extrusion cavity 232 is formed inside the third mounting ring 23. The extrusion cavity 232 communicates with the third insertion hole 231. A plurality of first ventilation holes 2111 are formed on the peripheral side of the air pipe 211. The extrusion cavity 232 communicates with the first ventilation holes 2111. A sliding groove 233 coaxial with the third insertion hole 231 is formed on the side of the extrusion cavity 232 close to the cabin body 1. One sliding groove 233 is formed at each third insertion hole 231. A sliding ring 223 that slides in the sliding groove 233 is sleeved on each reinforcing rod 222. The peripheral wall of the sliding ring 223 abuts against the peripheral wall of the sliding groove 233. A sliding cavity 225 is formed by the surface of the sliding ring 223 away from the second pressing ring 22, the side wall of the sliding groove 233 and the peripheral wall of the reinforcing rod 222. An exhaust passage 2221 is formed on the reinforcing rod 222. One end of the exhaust passage 2221 communicates with the sliding cavity 225, and the other end communicates with the outside;

[0041] There is a certain tolerance in the connection mode between the second pressing ring 22 and the air pipe 211 so that the second pressing ring 22 can slide along the axis direction of the air pipe 211 on the air pipe 211. The specific method of this application is to change the hole shape between the bolt and the fixing ring 221, changing the round hole into a waist-shaped hole;

[0042] Thus, when the air pressure in the cabin body 1 rises, the air pressure in the extrusion cavity 232 rises. Since the air pressure in the sliding cavity 225 communicates with the outside, the sliding ring 223 will slide towards the side where the volume of the sliding cavity 225 becomes smaller, and then drive the second pressing ring 22 to slide towards the cabin body 1 side, so that the third mounting ring 23 is pressed against the side wall of the cabin body 1. Therefore, when there is pressure in the cabin body 1, the second pressing ring 22 is always subjected to an extrusion force moving towards the cabin body 1, ensuring that the second pressing ring 22 will not loosen.

[0043] Refer to Figure 3 , in order to prevent the pressure in the cavity between the second insertion hole 2121 and the reinforcing rod 222 from increasing, a gas hole communicating with the exhaust passage 2221 is formed at one end of the reinforcing rod 222 away from the second pressing ring 22.

[0044] Refer to Figure 3 , in order to prevent the air pressure in the cabin body 1 from decreasing due to the gap between the sliding ring 223 and the sliding groove 233, a sealing ring 224 is embedded on the peripheral side of the sliding ring 223.

[0045] Refer to Figure 3, in order to prevent the pressure inside the cabin body 1 from decreasing due to the gap between the third mounting ring 23 and the air pipe 211, a second ventilation hole 234 communicating with the first ventilation hole 2111 is provided on the inner side wall of the extrusion cavity 232. A connecting pipe 235 is provided at the second ventilation hole 234. The peripheral wall of the connecting pipe 235 abuts against the side wall of the second ventilation hole 234, and the connecting pipe 235 elastically slides along the axial direction of the second ventilation hole 234 in the second ventilation hole 234. In the normal state, one end of the connecting pipe 235 is located inside the extrusion cavity 232, and the other end is located inside the first ventilation hole 2111;

[0046] When installing the third mounting ring 23, the operator presses the connecting pipe 235 into the third mounting ring 23, and then slews the third mounting ring 23 onto the air pipe 211 and slides it towards the cabin body 1. When the third mounting ring 23 abuts against the cabin body 1, the connecting pipe 235 automatically pops out and inserts into the first ventilation hole 2111. The connecting pipe 235 seals the gap between the third mounting ring 23 and the air pipe 211 at the first ventilation hole 2111.

[0047] Refer to Figure 3 , in order to enable the operator to detect the condition of the cabin wall at the connection port 11 in real time, an infrared emitter 24 and an infrared receiver 25 for receiving the light source emitted by the infrared emitter 24 are installed in the exhaust passage 2221. The infrared receiver 25 transmits the received signal to an external controller in real time through a wireless signaler;

[0048] Thus, when the cabin wall changes and causes the reinforcement rod 222 to bend, and the infrared receiver 25 cannot receive the infrared rays emitted by the infrared emitter 24, this information is sent to the controller through the wireless signaler, and the controller then sends this signal to external personnel through sound and light.

[0049] Refer to Figure 3 , to further prevent the cabin wall at the connection port 11 from bursting, a pressure relief valve 26 communicating with the extrusion cavity 232 is installed on the third mounting ring 23, and the pressure relief valve 26 is controlled by a controller;

[0050] After the infrared receiver 25 transmits the signal to the controller, the controller judges and controls the pressure relief valve 26 to relieve pressure in time to prevent further bursting.

[0051] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An air duct explosion-proof device for a saturation pressure chamber, characterized in that, Comprising: A cabin body (1), on which two connection ports (11) for connecting air ducts are provided; And an explosion-proof component (2) for explosion-proof at the connection port (11), the explosion-proof component (2) includes a first mounting member (21) and a second pressing ring (22), the first mounting member (21) includes an air pipe (211) with one end inserted into the connection port (11), a fitting ring (212) that fits against the inner wall of the cabin body (1) is fixed at one end of the air pipe (211) located inside the cabin body (1), and the other end is connected to the air duct; the second pressing ring (22) is sleeved on the air pipe (211) and fits against the outer peripheral wall of the cabin body (1), and the second pressing ring (22) is detachably and fixedly connected to the air pipe (211); On one side of the second pressing ring (22) close to the outer side wall of the cabin body (1), a plurality of reinforcing rods (222) are provided, and the plurality of reinforcing rods (222) are circumferentially distributed with the axis of the air pipe (211) as the center line, and a plurality of first insertion holes (12) are circumferentially formed on the outer peripheral wall of the cabin body (1) with the axis of the air pipe (211) as the center line, and the reinforcing rods (222) are inserted into the first insertion holes (12); The first insertion hole (12) penetrates through the wall thickness of the cabin body (1), and a plurality of second insertion holes (2121) are formed on one side of the fitting ring (212) close to the inner wall of the cabin body (1), and each second insertion hole (2121) corresponds to each second insertion hole (2121) one by one, and the reinforcing rods (222) are inserted into the second insertion holes (2121).

2. The explosion-proof device for the air duct of a saturated pressure chamber according to claim 1, wherein It further includes a third mounting ring (23) provided between the cabin body (1) and the second pressing ring (22), and a plurality of third insertion holes (231) are formed on the third mounting ring (23), and one third insertion hole (231) is used to communicate one first insertion hole (12) with one second insertion hole (2121); An extrusion cavity (232) is formed inside the third mounting ring (23). The extrusion cavity (232) communicates with the third insertion hole (231). A plurality of first ventilation holes (2111) are formed on the peripheral side of the air pipe (211). The extrusion cavity (232) communicates with the first ventilation holes (2111). A sliding groove (233) coaxial with the third insertion hole (231) is formed on one side of the extrusion cavity (232) close to the cabin body (1). One sliding groove (233) is formed at each third insertion hole (231). A sliding ring (223) that slides in the sliding groove (233) is sleeved on each reinforcing rod (222). The peripheral wall of the sliding ring (223) abuts against the peripheral wall of the sliding groove (233). A sliding cavity (225) is formed by the surface of the sliding ring (223) away from the second pressing ring (22), the side wall of the sliding groove (233), and the peripheral wall of the reinforcing rod (222). An exhaust passage (2221) is formed on the reinforcing rod (222). One end of the exhaust passage (2221) communicates with the sliding cavity (225), and the other end communicates with the outside; A certain tolerance is left in the connection mode between the second pressing ring (22) and the air pipe (211) so that the second pressing ring (22) can slide along the axis of the air pipe (211) on the air pipe (211).

3. The explosion-proof device for the air duct of a saturation pressure chamber according to claim 2, characterized in that, A sealing ring (224) is embedded on the peripheral side of the sliding ring (223).

4. The explosion-proof device for the air duct of a saturated pressure chamber according to claim 2, characterized in that, A second ventilation hole (234) communicating with the first ventilation hole (2111) is formed on the inner side wall of the extrusion cavity (232). A connecting pipe (235) is provided at the second ventilation hole (234). The peripheral wall of the connecting pipe (235) abuts against the side wall of the second ventilation hole (234), and the connecting pipe (235) elastically slides along the axis of the second ventilation hole (234) in the second ventilation hole (234). In the normal state, one end of the connecting pipe (235) is located inside the extrusion cavity (232), and the other end is located inside the first ventilation hole (2111).

5. The explosion-proof device for the air duct of a saturation pressurized chamber according to claim 2, wherein An infrared emitter (24) and an infrared receiver (25) that receives the light source emitted by the infrared emitter (24) are installed in the exhaust passage (2221). The infrared receiver (25) transmits the received signal to an external controller in real time through a wireless signaler.

6. The explosion-proof device for the air duct of a saturation pressure chamber according to claim 5, characterized in that, A pressure relief valve (26) communicating with the extrusion cavity (232) is installed on the third mounting ring (23). The pressure relief valve (26) is controlled by a controller.

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