Low-impact, waterproof and sealing integrated and reusable ventilation device for spacecraft

Abstract

A low-impact, waterproof and sealing integrated and reusable ventilation device for a spacecraft is characterized in that a vent hole is formed in a sealed cabin, a valve cover is installed in the vent hole in a sealed mode, an inner sleeve is fixedly connected with the valve cover and arranged outside the cabin, an outer sleeve is of a two-section cylinder structure and is arranged outside the inner sleeve in a sleeving mode, and the small-diameter section cylinder and the inner sleeve are sealed; a cavity is formed between the large-diameter section cylinder and the inner sleeve, an outboard bent pipe is arranged on the side wall of the cavity, and a separation spring is arranged on the inner sleeve in a sleeving mode and is in a compressed state through structural limitation on the inner sleeve and the outer sleeve before ventilation; the pressing rod penetrates through an inner hole of the inner sleeve, one end of the pressing rod is connected with the pyrotechnic separation nut, the other end of the pressing rod is sleeved with the pulling rod spring and arranged in an inner cavity of the inner sleeve, and the pressing rod tensions the inner sleeve through a limiting part on the pressing rod under the action of the pyrotechnic separation nut before ventilation and enables the pulling rod spring to be in a compressed state; a buffer pad is mounted between the end part of the cylinder at the small-diameter end of the outer sleeve and the pyrotechnic separation nut; the in-cabin end cover is arranged at the position corresponding to the sealed cabin vent hole, and a vent valve hole channel is formed in the in-cabin end cover.

Description

TECHNICAL FIELD

[0001] The application relates to a low-impact, waterproof sealing integrated reusable ventilation and air exchange device for a spacecraft, which can be widely applied to ventilation and air exchange of a manned spacecraft sealed cabin after landing and belongs to the technical field of spacecrafts. BACKGROUND

[0002] The China Space Station has entered a comprehensive operation stage, and at least two manned spacecrafts need to be launched every year to go back and forth between the space station and the ground.

[0003] Due to the ignition of various pyrotechnic devices during the return process of the sealed cabin of the manned spacecraft, harmful gases generated in the process may leak into the cabin and cause air pollution in the cabin. After the sealed cabin lands, its own air circulation system can only maintain for a limited time, so fresh air must be supplied to the cabin in time to ensure the safety of astronauts.

[0004] The ventilation valve of the Shenzhou spacecraft is installed on the top of the sealed cabin and is composed of a ventilation pipeline, a sealing device, a cover throwing mechanism and a locking mechanism. When the sealed cabin is in orbit, the sealing device ensures the air tightness of the ventilation valve. The locking device locks the movable parts of the valve to prevent the valve from being accidentally opened due to vibration, impact and the like. When the sealed cabin returns to the ground at a height of about 5 km, the cover throwing mechanism throws the cover according to the instruction to ventilate the inside and outside of the cabin.

[0005] The ventilation valve of the foreign manned spacecraft currently also locks the valve cover in orbit through a shear pin type or steel ball type locking mechanism. When the valve cover needs to be opened, an igniter is ignited to generate high-pressure gas to push a piston to shear the shear pin or a steel ball to be unlocked, and the valve cover is thrown out, thereby opening the ventilation valve.

[0006] Therefore, the existing technology of the ventilation valve is to throw the valve cover by high-temperature and high-pressure gas generated by the ignition of the pyrotechnics to realize ventilation and air exchange, which has the following problems:

[0007] 1) The gas will be accumulated in the heat-resistant layer outside the metal shell for a long time after the valve cover is thrown, which may cause the harmful gas in the cabin to exceed the standard and endanger the safety of astronauts;

[0008] 2) The valve cover is thrown at too high a speed, which may cause unpredictable damage to the heat-resistant layer;

[0009] 3) The valve cover is thrown at a large impact, which may affect the normal work of the surrounding equipment;

[0010] 4) The product is complex to install, requires personnel with pyrotechnic operation qualifications to assemble and can only be used once, and has a high use cost.

[0011] Therefore, it is necessary to redesign the form of locking and opening the valve cover while considering low impact, waterproof sealing and reusability, and to improve the environmental protection and reliability of the ventilation and air exchange device. SUMMARY

[0012] The technical problem solved by the present application is to overcome the shortcomings of the prior art and provide a low-impact, waterproof sealing integrated and reusable ventilation device for spacecraft.

[0013] The technical solution of the present application is a low-impact, waterproof sealing integrated and reusable ventilation device for spacecraft, comprising a valve body and a compression assembly; the valve body comprises an inner sleeve, an outer sleeve, an outboard elbow, a separation spring, a valve cover and an inboard end cover; the compression assembly comprises a pyrotechnic separation nut, a buffer pad, a compression rod and a pull rod spring.

[0014] The compression assembly is located outside the sealed cabin, the sealed cabin is provided with a vent hole, the valve cover is sealingly installed in the vent hole, the inner sleeve is fixedly connected with the valve cover and placed outside the cabin, the outer sleeve is a two-section cylindrical sleeve structure, is sleeved outside the inner sleeve, the small-diameter section of the cylindrical sleeve is sealingly connected with the inner sleeve, the large-diameter section of the cylindrical sleeve forms a cavity with the inner sleeve, the side wall of the cavity is provided with the outboard elbow, the separation spring is sleeved on the inner sleeve and is limited by the structure on the inner and outer sleeves to be in a compressed state before the vent hole is opened; the compression rod passes through the inner hole of the inner sleeve, one end of the compression rod is connected with the pyrotechnic separation nut, the other end of the compression rod is sleeved with the pull rod spring and placed in the inner cavity of the inner sleeve, before the vent hole is opened, the compression rod is pulled tightly to the inner sleeve by the pyrotechnic separation nut and the pull rod spring is in a compressed state; the buffer pad is installed between the small-diameter end of the cylindrical sleeve of the outer sleeve and the pyrotechnic separation nut; the inboard end cover is arranged at a position corresponding to the vent hole of the sealed cabin, and a ventilation valve channel is arranged on the inboard end cover; when the valve cover needs to be opened, the pyrotechnic separation nut unlocks the compression rod, releases the inner sleeve and the valve cover, and pushes the inner sleeve and the valve cover to be unlocked and enter the inboard end cover under the action of the separation spring, to form a gas path from the outboard elbow to the inboard end cover, thereby realizing ventilation between the inside and outside of the cabin.

[0015] Preferably, the valve body further comprises a water blocking sleeve and a water bag; the inboard end cover is provided with a water outlet at the bottom, the bottom surface of the inboard end cover is provided with an inclined surface facing the water outlet, the water blocking sleeve is screwed with the inner wall of the inboard end cover; the water bag is sleeved with the water outlet and is sealingly connected with the inboard end cover through a ball head conduit and an outer sleeve nut; a labyrinth channel is formed by the outboard elbow, the outer sleeve, the water blocking sleeve and the water bag, thereby realizing waterproof.

[0016] Preferably, the upper end of the water blocking sleeve is in a ring structure for connection with the inboard end cover, the lower part of the ring structure is in a funnel structure, and the lowermost part is a flange with holes for increasing the ventilation area and reducing the flow resistance; the funnel structure and the flange are in a cylindrical barrel structure, one side of the funnel structure and the cylindrical barrel structure is provided with an opening, and the opening is reversely corresponding to the ventilation valve channel.

[0017] Preferably, the valve cover bottom is provided with a groove penetrating through the edge of the valve cover bottom, and the groove is preferably a cross groove.

[0018] Preferably, the water bag set is sealed and connected with the cabin end cover through a 37° ball head conduit and a sleeve nut.

[0019] Preferably, the sealed cabin water baffle, the cabin end cover and the water bag do not need to be disassembled and replaced, and can be reused, and the sealed cabin can be restored to use by disassembling and replacing the pyrotechnic separation nut and reassembling.

[0020] Preferably, the pressing assembly further comprises a spherical pad mounted on the inner sleeve and located at a position opposite to the limiting position on the pressing rod, so as to avoid the influence of external load bending moment on the bearing capacity of the pressing rod and the movement of the valve cover.

[0021] Preferably, the device comprises four sealing links, one of which is located between the pyrotechnic separation nut and the outer sleeve, one of which is located between the outer wall of the inner sleeve and the inner wall of the small diameter section of the outer sleeve, one of which is located between the inner sleeve and the valve cover, and one of which is located between the side wall of the valve cover and the air hole on the sealed cabin.

[0022] Preferably, the outer sleeve inside the sealed cabin and the cabin end cover are connected with the sealed cabin through fasteners.

[0023] An assembly method of the low-impact, waterproof sealing integrated and reusable ventilation device for the spacecraft, comprising:

[0024] Assembling the sealed cabin valve body: after the separation spring is mounted on the inner sleeve, the inner sleeve is pressed into the outer sleeve by a spring pressing tool, and is limited by a preset step of the outer sleeve; at this time, the inner sleeve is fixed on the outer sleeve by a tool; the separation nut and the buffer pad are installed on the top of the outer sleeve through fasteners; the combined body of the spherical pad, the pressing rod and the pull rod spring is loaded into the inner sleeve and screwed into the pyrotechnic separation nut to exert a preset torque after limiting; the valve cover is installed at the bottom of the inner sleeve through fasteners, and a preset torque is exerted; the outer bend pipe is installed on the outer sleeve using fasteners.

[0025] The sealed cabin valve body is fixed with the sealed cabin, and the valve cover is installed in the air hole of the sealed cabin and sealed.

[0026] Assembling the sealed cabin valve body: the water baffle is screwed with the cabin end cover using a water baffle installation tool; the water bag is sealed and connected with the cabin end cover through a ball head conduit and a sleeve nut.

[0027] The sealed cabin valve body is fixed with the sealed cabin.

[0028] Compared with the prior art, the beneficial effects of the present application are:

[0029] The invention is located outside the sealed cabin and avoids the high-pressure gas generated by the firecracker directly acting on the bomb-throwing valve cover, thereby solving the problems of large bomb-throwing impact and gas pollution in the traditional scheme from the source.

[0030] The invention locks the valve cover through the firecracker separation nut compression device in the single-piece ventilation device product, and when the valve cover needs to be opened, the firecracker separation nut releases the valve cover, and the valve cover is pushed and unlocked under the action of the spring, thereby realizing the ventilation function of the product, avoiding the high-pressure gas generated by the firecracker directly acting on the bomb-throwing valve cover, and avoiding the possible harm to other equipment after the valve cover is unlocked;

[0031] The invention has the remarkable feature of low impact, and according to the unlocking working characteristics of the compression assembly, the energy of the firecracker only needs to overcome the friction of the compression rod pulling out, rather than the traditional mechanical damage to the product connection structure by the firecracker energy, and the demand for firecracker energy is smaller. The product has a small amount of charge, which indicates that the impact output by the firecracker is smaller. In addition, the invention also sets a buffer pad at the installation position of the separation nut for absorbing the energy generated by the recoil force after the unlocking action, thereby further reducing the working impact of the product;

[0032] The invention adopts a lightweight design scheme, and through the firecracker compression and waterproof sealing integrated design, the product can withstand various impact and vibration loads, and can also be waterproof and sealed, so that the technical scheme is more compact.

[0033] The invention sets a spherical pad at the compression rod to avoid the influence of external load moment on the bearing capacity of the compression rod and the movement of the valve cover, thereby further improving the connection and unlocking reliability of the ventilation device.

[0034] The invention is a labyrinth channel enclosed by the cabin outside elbow, sleeve, water blocking sleeve and water bag, and four sealing links are also set, thereby realizing in-orbit sealing and waterproof function in the case of rain or falling into the sea.

[0035] The invention has a two-body type design inside and outside the sealed cabin, and the operator can complete the assembly of the ventilation device by installing four M5 fastening screws respectively when boarding the ship. After the product is used, the inside part of the sealed cabin does not need to be disassembled and replaced, and only the outside part of the sealed cabin needs to be disassembled and the firecracker separation nut needs to be replaced, so that the product can be reused, thereby greatly reducing the assembly difficulty and use cost. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1(a) is a perspective view of the invention;

[0037] Fig. 1(b) is a schematic view of the composition of the invention;

[0038] Figure 2is the front and rear state contrast chart of the invention;

[0039] Figure 3 is the labyrinth waterproof schematic diagram of the invention;

[0040] Figure 4 is the water blocking sleeve structure schematic diagram of the invention;

[0041] Figure 5 is the four sealing link schematic diagram of the invention. DETAILED DESCRIPTION

[0042] The invention is further described below in combination with examples.

[0043] As shown in Figures 1 and 2, a configuration schematic diagram of a low-impact, waterproof sealing integrated and reusable ventilation device for a spacecraft is shown in Figure 1, which comprises a valve body and a compression assembly. The valve body specifically comprises an inner sleeve 6, an outer sleeve 7, an outboard elbow 8, a separation spring 9, a valve cover 10, a water blocking sleeve 11, an inboard end cover 12, a water bag 13, and a sealing ring 14. The compression assembly specifically comprises a pyrotechnic separation nut 1, a buffer pad 2, a spherical pad 3, a compression rod 4, and a pull rod spring 5. There is also a peripheral device comprising a sealed cabin structure plate 15. The compression assembly is located outside the sealed cabin, and the sealed cabin is provided with a ventilation hole, in which the valve cover is sealingly installed. The inner sleeve is fixedly connected with the valve cover and placed outside the cabin. The outer sleeve is a two-segment cylindrical sleeve structure, which is sleeved outside the inner sleeve. The small-diameter segment of the cylindrical sleeve is sealed with the inner sleeve, and the large-diameter segment of the cylindrical sleeve forms a cavity with the inner sleeve. The side wall of the cavity is provided with the outboard elbow. The separation spring is sleeved on the inner sleeve and is in a compressed state before ventilation through the structure limiting position on the inner and outer sleeves. The compression rod passes through the inner hole of the inner sleeve, one end of which is connected with the pyrotechnic separation nut, and the other end of which is sleeved with the pull rod spring and placed in the inner cavity of the inner sleeve. Before ventilation, the compression rod is pulled tightly to the inner sleeve by the pyrotechnic separation nut and makes the pull rod spring in a compressed state. The pyrotechnic separation nut 1 of the invention is arranged outside the sealed cabin, which completely eliminates the hidden danger of harmful gas leakage into the cabin.

[0044] The buffer pad is installed between the small-diameter end of the cylindrical sleeve of the outer sleeve and the pyrotechnic separation nut, which is used to absorb the energy generated by the recoil force after the completion of the unlocking action, further reducing the working impact of the product. The inboard end cover is arranged at a position corresponding to the ventilation hole of the sealed cabin, and a ventilation valve channel is arranged on the inboard end cover. When the valve cover needs to be opened, the pyrotechnic separation nut unlocks the compression rod, releases the inner sleeve and the valve cover, and pushes the inner sleeve and the valve cover to unlock and enter the inboard end cover under the action of the separation spring, forming a gas path from the outboard elbow to the inboard end cover, and realizing the ventilation between the inside and outside of the cabin.

[0045] As Figure 2As shown, the present invention uses a pyrotechnic release nut 1, a buffer pad 2, a spherical pad 3, a clamping rod 4, and a pull rod spring 5 to lock the inner sleeve 6 and the valve cover 10 assembly. When the valve cover 10 needs to be opened, the pyrotechnic release nut 1 unlocks and releases the inner sleeve 6 and the valve cover 10. Under the action of the spring, the inner sleeve 6 and the valve cover 10 are pushed to unlock, ensuring that the ventilation and air exchange device is reliably sealed before the sealed cabin lands. This avoids the high-pressure gas generated by the gunpowder from directly acting on the ejection valve cover 10, and the unlocking impact is reduced to below 1000g. Furthermore, after the valve cover 10 is unlocked, it remains inside the valve body, avoiding potential damage to other equipment.

[0046] If the ventilation device has rainproof / waterproof requirements, the valve body of this invention also includes a water-retaining sleeve and a water bag; the bottom of the inner end cover is provided with a water outlet, and the bottom surface of the inner end cover is provided with an inclined surface facing the water outlet; the water-retaining sleeve is screwed to the inner wall of the inner end cover; the water bag is fitted onto the water outlet and sealed and connected to the inner end cover through a 37° ball-head conduit and an outer nut; a labyrinthine channel is formed by the outer bend, outer sleeve, water-retaining sleeve, and water bag, such as Figure 3 As shown. Simultaneously, four sealing elements and five sealing rings (14 in total) are integrated to achieve both sealing and waterproofing functions; specifically as follows... Figure 5 As shown, there are four sealing links: one between the pyrotechnic separation nut and the outer sleeve, one between the outer wall of the inner sleeve and the inner wall of the small-diameter cylindrical section of the outer sleeve, one between the inner sleeve and the valve cover, and one between the side wall of the valve cover and the vent hole on the sealing chamber.

[0047] like Figure 4 As shown, the upper end of the water-retaining sleeve has a ring structure, which is used for connection with the end cover inside the cabin (see below). Figure 4 The ring structure is followed by a funnel-shaped structure below, and a perforated flange at the bottom (to increase ventilation area and reduce flow resistance). Between the funnel-shaped structure and the flange is a cylindrical barrel structure. An opening is provided on one side of the funnel-shaped structure and the cylindrical barrel structure, and the opening corresponds to the ventilation valve channel.

[0048] Benfamin installed a spherical pad 3 at the clamping rod 4 to avoid the influence of external load bending moment on the bearing capacity of the clamping rod 4 and the movement of the valve cover 10, further improving the connection reliability of the ventilation and air exchange device inner sleeve 6 and valve cover 10 assembly, thereby improving the reliability of the seal.

[0049] During shipboard assembly, the ventilation device can be assembled by installing four M5 screws at the outer sleeve 7 and the inner end cover 12 on the inside and outside of the sealed compartment, respectively, which improves the convenience of shipboard assembly. After the ventilation device is working, the inner part of the sealed compartment, namely the water-blocking sleeve 11, the inner end cover 12, and the water bag 13, does not need to be disassembled or replaced and can be reused. The outer part of the sealed compartment can be disassembled and replaced with the pyrotechnic separation nut 1 and reassembled to restore its use, which greatly reduces the assembly difficulty and product cost.

[0050] The application further provides an assembling method of the device, comprising:

[0051] The assembling method of the sealing cabin outer valve body is as follows: after the separation spring 9 is sleeved on the inner sleeve 6, the inner sleeve 6 is pressed into the outer sleeve 7 by a spring pressing tool, and is limited by the preset step of the outer sleeve 7. At this time, the inner sleeve 6 is fixed on the outer sleeve 7 by the tool. The pyrotechnic separation nut 1 and the buffer pad 2 are installed on the top of the outer sleeve 7 by four M4*25 internal hexagonal titanium nails. The combined body of the spherical pad 3, the pressing rod 4 and the pull rod spring 5 is loaded into the inner sleeve and screwed into the separation nut 1 to limit and apply a torque of 7.5 Nm. The valve cover 10 is installed at the bottom of the inner sleeve by two M4*12 internal hexagonal titanium nails and a torque of 4.5 Nm is applied. Four cabin outer elbow pipes 8 are installed on the outer sleeve by using 16 M3*8 screws. The sealing cabin outer valve body is fixed with the upper plate of the peripheral device structure 15 (the sealing cabin structure plate).

[0052] The assembling method of the sealing cabin inner valve body is as follows: the water baffle 11 is screwed with the cabin inner end cover 12 by using a water baffle installation tool. The water bag 13 is sealed and connected with the cabin inner end cover 12 by a 37° spherical head conduit and a sleeve nut. The sealing cabin inner valve body is fixed with the lower plate of the peripheral device structure.

[0053] The working principle of the low-impact, waterproof sealing integrated and reusable ventilation and air exchange device for a spacecraft is described in detail as follows by taking the working of a single set ventilation and air exchange device as an example.

[0054] The working principle of the low-impact, waterproof sealing integrated and reusable ventilation and air exchange device for a spacecraft is described in detail as follows by taking the working of a single set ventilation and air exchange device as an example.

[0055] To sum up, the above is only a preferred embodiment of the application, and is not used to limit the protection scope of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

[0056] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application using the disclosed methods and technical contents without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solutions of the present application shall fall within the protection scope of the technical solutions of the present application.

Claims

1. A low-impact, waterproof, and reusable ventilation and air exchange device for spacecraft, characterized in that: It includes a valve body and a clamping assembly; the valve body includes an inner sleeve, an outer sleeve, an outer bend, a separation spring, a valve cover, and an inner end cover; the clamping assembly includes a pyrotechnic separation nut, a buffer pad, a clamping rod, and a pull rod spring; The clamping assembly is located outside the sealed chamber. A vent is provided on the sealed chamber, and a valve cover is sealed and installed inside the vent. The inner sleeve is fixedly connected to the valve cover and placed outside the chamber. The outer sleeve is a two-section cylindrical structure, fitted over the inner sleeve. The smaller diameter section of the cylindrical section is sealed to the inner sleeve, while the larger diameter section forms a cavity with the inner sleeve. An external bend is provided on the side wall of the cavity. The release spring is fitted onto the inner sleeve and is in a compressed state before ventilation due to structural constraints on the inner and outer sleeves. The clamping rod passes through the inner hole of the inner sleeve, with one end connected to the pyrotechnic release nut and the other end fitted with a pull rod spring. The spring is placed inside the inner sleeve. Before ventilation, the clamping rod is tightened by the limit on the clamping rod under the action of the pyrotechnic separation nut, and the spring is compressed. A buffer pad is installed between the small diameter end of the outer sleeve and the pyrotechnic separation nut. The inner end cover is set at the position corresponding to the vent of the sealed compartment, and a ventilation valve channel is set on it. When the valve cover needs to be opened, the pyrotechnic separation nut unlocks the clamping rod, releases the inner sleeve and valve cover, and pushes the inner sleeve and valve cover to unlock and enter the inner end cover under the action of the separation spring, forming an air passage from the outer bend to the inner end cover, realizing ventilation between the inside and outside of the compartment.

2. The apparatus according to claim 1, characterized in that: The valve body also includes a water-retaining sleeve and a water bag; the bottom of the inner end cover is provided with a water outlet, and the bottom surface of the inner end cover is provided with an inclined surface facing the water outlet; the water-retaining sleeve is screwed to the inner wall of the inner end cover; the water bag is fitted onto the water outlet and is sealed and connected to the inner end cover through a ball-headed conduit and an outer nut; waterproofing is achieved through a labyrinthine channel formed by the outer bend, outer sleeve, water-retaining sleeve and water bag.

3. The apparatus according to claim 2, characterized in that: The upper end of the water-blocking sleeve is a ring structure for connecting with the end cover inside the cabin. Below the ring structure is a funnel-shaped structure, and at the bottom is a perforated flange to increase the ventilation area and reduce flow resistance. Between the funnel-shaped structure and the flange is a cylindrical barrel structure. An opening is provided on one side of the funnel structure and the cylindrical barrel structure, and the opening corresponds to the ventilation valve channel in the opposite direction.

4. The apparatus according to claim 2, characterized in that: The bottom of the valve cover is provided with a groove that runs through the bottom edge of the valve cover, and the groove is preferably a cross groove.

5. The apparatus according to claim 2, characterized in that: The water outlet of the water bag kit is sealed and connected to the inner end cap of the chamber via a 37° ball-head conduit and an outer nut.

6. The apparatus according to claim 2, characterized in that: The water-blocking sleeve, end cap, and water bag inside the sealed chamber do not need to be disassembled or replaced and can be reused. The outer parts of the sealed chamber can be disassembled, replaced with pyrotechnic separation nuts, and reassembled to restore their use.

7. The apparatus according to claim 1, characterized in that: The clamping assembly also includes a spherical pad, which is installed on the inner sleeve and located at a position opposite to the limit on the clamping rod, so as to avoid the influence of external load bending moment on the bearing capacity of the clamping rod and the movement of the valve cover.

8. The apparatus according to claim 1, characterized in that: It includes four sealing links: one between the pyrotechnic separation nut and the outer sleeve, one between the outer wall of the inner sleeve and the inner wall of the small-diameter cylindrical section of the outer sleeve, one between the inner sleeve and the valve cover, and one between the side wall of the valve cover and the vent hole on the sealing chamber.

9. The apparatus according to claim 1, characterized in that: The outer sleeve and inner end cap of the sealed chamber are connected to the sealed chamber by fasteners.

10. A method for assembling a low-impact, waterproof, sealed, reusable ventilation and air exchange device for spacecraft as described in claim 1, characterized in that... include: Assemble the outer valve body of the sealing chamber: After the release spring is in place on the inner sleeve, press the inner sleeve into the outer sleeve using the spring compression fixture, and limit it using the preset step on the outer sleeve; at this time, fix the inner sleeve on the outer sleeve using the fixture; install the release nut and buffer pad to the top of the outer sleeve using fasteners; after the ball pad, clamping rod, and pull rod spring are assembled, install them into the inner sleeve and screw in the fire-resistant release nut to the limit, and then apply the preset torque; remove the spring compression fixture, install the valve cover at the bottom of the inner sleeve using fasteners, and apply the preset torque; Use fasteners to install the outer bend onto the outer sleeve; The valve body outside the sealed chamber is fixed to the sealed chamber, and the valve cover is installed in the vent hole on the sealed chamber and sealed. Assemble the valve body inside the sealed compartment: Use the water-retaining sleeve installation tool to screw the water-retaining sleeve to the end cover inside the compartment; The water bag is sealed and connected to the inner end cap of the cabin via a ball-headed conduit and an outer nut; The valve body is fixed to the sealed chamber.

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