CN112224452A - Multiplexing type millisecond-level rapid pressure relief vacuum mechanism and rapid pressure relief test system - Google Patents
Multiplexing type millisecond-level rapid pressure relief vacuum mechanism and rapid pressure relief test system Download PDFInfo
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- CN112224452A CN112224452A CN202011124207.1A CN202011124207A CN112224452A CN 112224452 A CN112224452 A CN 112224452A CN 202011124207 A CN202011124207 A CN 202011124207A CN 112224452 A CN112224452 A CN 112224452A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
- B64G2007/005—Space simulation vacuum chambers
Abstract
The invention discloses a multiplex millisecond-level rapid pressure relief vacuum mechanism for a rapid pressure relief environment ground simulation device, which comprises a valve seat sealing component, an overturning pressure relief component and a traction energy storage component, wherein a lower fixing plate of the traction energy storage component is integrally installed with a valve main body of the valve seat sealing component in a bolt connection mode, an integrated valve rod on a sealing valve plate in the valve seat sealing component is connected with an ejector rod in the traction energy storage component in a bolt connection mode, and the overturning pressure relief component is arranged on an upper fixing plate of the traction energy storage component in a bolt connection or welding mode. The invention has the advantages of no dynamic sealing structure in the whole structure, adjustable opening time, good sealing property, easy operation, high automation degree, strong reliability and stronger functionality.
Description
Technical Field
The invention belongs to the technical field of environmental simulation and test, and particularly relates to a multiplexing millisecond-level rapid pressure relief vacuum mechanism for high-altitude or space rapid pressure relief environmental simulation of products and systems, and a corresponding rapid pressure relief test system.
Background
The rapid decompression is a phenomenon that the pressure inside an outer cabin is directly contacted (instantaneously decompressed) due to high atmospheric pressure inside the outer cabin and low atmospheric pressure outside the outer cabin of aircrafts such as airplanes and spaceships and spacecraft for some reason or condition in high altitude or space.
The successive appearance and development of aerospace vehicles such as airplanes, rockets, space shuttles and the like greatly promote the progress of human civilization over the last century, not only accelerate the convergence and promotion of economy, politics, culture and science and technology among different countries and different regions in the world, but also expand the field of vision and footprint of human beings to the outer space. However, the development of the current aerospace craft is not complete, and the aerospace craft has the possibility of danger from the time when a pilot enters a cockpit, flies in the air, enters an orbit and returns to the air until the pilot leaves the cockpit after landing. The safety of the aerospace vehicle depends on the safety and reliability of the aerospace vehicle, a transmitting device, a measurement and control device, a search and rescue facility and other systems, and depends on the quality of a pilot, the harmony of a man-machine system and the reliability of the work of ground personnel. The problem of cabin decompression which may occur in the flight process of the aerospace craft directly affects the safety and reliability of airborne equipment, and endangers the life safety of airborne personnel such as pilots and astronauts.
The problem of rapid decompression caused by the pressure loss is frequent in the aerospace development history, the most famous one-time decompression accident occurs in 30.6 th 1971, and when the Suyi alliance No. 11 airship returns to the atmosphere, a pressure valve is shaken off due to mechanical failure, and a sealed cabin is instantaneously decompressed, so that 3 astronauts sacrifice the pressure loss. For a civil aviation passenger plane, due to the pressure loss of an aircraft cabin, the return flight, the emergency landing and even the crash of the passenger plane are caused, so that immeasurable personnel and property losses are caused, for example, 5 and 14 days in 2018, a front windshield glass of a right seat of a cockpit in the process of flying of a 3U8633 passenger plane in Sichuan aviation is suddenly cracked and falls off, and the instantaneous pressure loss of the aircraft cabin is accompanied by low temperature, oxygen deficiency and strong airflow impact, so that not only is the human body of a pilot seriously damaged and difficult to operate, but also part of airborne equipment is failed, and serious accidents are caused; in the same year, the pressure loss accidents of three aircraft cabins occur in the southwest aviation of the United states within one month, and a plurality of passengers are injured and killed.
Therefore, the research of the rapid decompression process and the evaluation and response protection technology thereof are the problems which must be faced by the exploration engineering of important countries such as the near space exploration, the deep space exploration, the moon or the Mars living base and the like in the future. In order to better research the rapid decompression process, scientific researchers build a rapid decompression environment simulation device on the ground for researching the influence of cabin decompression on airborne equipment and training emergency treatment and escape capability of pilots and astronauts when the cabins are subjected to decompression, so that the equipment is an important link for improving the safety and reliability of the flight of aerospace vehicles. At present, aiming at a rapid decompression environment effect test, the aviation industry standard HB 6167/6167A and the national military standard GJB 150/150A have corresponding standards. The pressure reduction time required by the rapid pressure reduction test is extremely short, the time for reducing the pressure from 75.2kPa to 18.8kPa/4.4kPa is 15s, the explosive pressure reduction is less than 0.1s, the conventional vacuum pumping mode is difficult to realize, and the related environment simulation technology at the present stage mostly adopts the structure shown in FIG. 1. Fig. 1 shows a conventional rapid decompression environment simulation test system, which includes a vacuum reserve chamber and a rapid decompression chamber, both of which are controlled by a decompression mechanism. During the test, the sample test piece is placed in the rapid decompression chamber, the air pressure in the vacuum storage chamber cavity and the rapid decompression chamber is respectively pumped to be below 18.8kPa and 75.2kPa, and the rapid decompression environment simulation is realized by rapidly opening the decompression mechanism. Therefore, the rapid pressure relief mechanism is one of the core components of the rapid pressure reduction environment simulation device. According to the requirements of the national military standard, the requirement of extremely fast pressure reduction can be completed within 0.1s, so that the fast pressure reducing mechanism is required to be instantly opened within the millisecond range, the previous tests are mostly realized by impacting glass or a membrane and the like, but the problems of poor repeatability, high pollutant, inaccurate controllable time and the like exist at the same time.
Disclosure of Invention
The invention aims to provide a multiplexing type millisecond-level rapid pressure relief vacuum mechanism applied to a rapid pressure relief environment ground simulation device, wherein the pressure relief vacuum mechanism has the advantages of high sealing performance, repeated opening, high control precision, high reliability and the like, and can effectively realize the instantaneous opening of the mechanism in a millisecond-level range and the effective simulation of a rapid pressure relief environment. The invention also aims to provide a multiplexing-type millisecond-level rapid decompression test system applied to a rapid decompression environment ground simulation device, which can realize the instant opening of a mechanism in a millisecond-level range, is used for checking the adaptability and reliability of airborne equipment to a rapid decompression environment, and carrying out relevant emergency treatment and escape capacity training of pilots and astronauts.
The purpose of the invention is realized by the following technical scheme:
a quick pressure release vacuum mechanism of multiplexing formula millisecond level for quick decompression environment ground analogue means, including disk seat seal subassembly, upset pressure release subassembly, pull energy storage subassembly, the bottom plate that pulls energy storage subassembly passes through bolted connection mode and disk seat seal subassembly's valve main part installation integration in an organic whole, and the integral type valve rod on the sealed valve plate passes through the mode of spiro union and is connected with the ejector pin in pulling the energy storage subassembly among the disk seat seal subassembly, and upset pressure release subassembly passes through bolted connection or welded mode and sets up in the upper fixed plate who pulls the energy storage subassembly.
Wherein, valve seat seal assembly includes: valve main body, sealing valve plate, valve plate vacuum sealing ring, welding corrugated pipe and valve seat vacuum seal
The valve body is in an integrally welded vacuum angle valve form, a vacuum flange connector is reserved at the side part and the bottom part, a sealing groove is reserved at the top part, and a valve seat vacuum sealing ring is arranged in the sealing groove; a sealing valve plate is arranged in the valve main body, an integrated valve rod is arranged at the upper part of the sealing valve plate, a sealing groove is arranged on the lower sealing surface, and a valve plate vacuum sealing ring is arranged in the sealing groove; the sealing valve plate and the welding corrugated pipe are in a lower welding mode, the valve main body and the welding corrugated pipe are connected through bolts and clamp the valve seat vacuum sealing ring in the middle, and the corrugated pipe can be welded after connection to realize complete sealing of the valve main body and the outer space of the upper side.
When the sealing valve plate is subjected to downward pretightening force, the valve plate vacuum sealing ring is compressed to realize sealing, and the two welding flanges of the valve main body can be completely separated.
Wherein, upset pressure release subassembly includes: the turnover base, the circular top plate, the turnover rotating shaft, the turnover cover plate, the belt shaft adjusting hand wheel, the bearing, the locking push block, the electromagnetic push rod, the locking support and the bearing retainer ring, the turnover base, the electromagnetic push rod and the locking support in the turnover pressure relief assembly are fixed on the upper fixing plate of the traction energy storage assembly in a bolt connection or direct welding mode, the turnover base and the turnover cover plate in the turnover pressure relief assembly are connected by the turnover rotating shaft to form a turnover mechanism, the circular top plate and the belt shaft adjusting hand wheel are connected and integrated through bolts, the rotating shaft of the belt shaft adjusting hand wheel and the turnover cover plate are also in a threaded connection mode, the height stroke adjustment is realized through rotating the belt shaft adjusting hand wheel, the bearing, the locking push block, the locking support and the bearing retainer ring are assembled and integrated, and the locking push block is linked with.
Wherein, pull energy storage subassembly includes: the traction energy storage assembly is characterized by comprising a lower fixing plate, an upright post fixing seat, a valve rod fixing seat, a supporting upright post, an upper fixing plate, a traction air cylinder, an ejector rod, a damping cushion block, an energy storage spring and a traction disc, wherein the lower fixing plate, the supporting upright post and the upper fixing plate are connected into a whole through the upright post fixing seat; two sets of traction cylinders are arranged above the upper fixing plate, the upper end of the energy storage spring is connected to the upper fixing plate, the lower end of the energy storage spring is fixed to the traction disc, and the traction disc is connected with the ejector rod into a whole in a welding mode.
When the mechanism needs to be closed, the traction cylinder moves downwards to draw the ejector rod and the traction disc to move downwards linearly, meanwhile, the energy storage spring realizes stretching energy storage, and after the traction cylinder moves downwards in place, the turnover cover plate is rotated to a closed state, so that the bearing is pressed above the turnover cover plate; at the moment, the closing of the mechanism is realized by downward force transmission through the bearing, the turnover cover plate, the ejector rod and the sealing valve plate, the pretightening force of the sealing valve plate can be adjusted until the valve is completely closed by adjusting the belt shaft adjusting hand wheel after the closing, and the traction cylinder is lifted upwards to the original position after the valve is completely closed.
When the mechanism needs to be opened, the electromagnetic push rod retracts to drive the locking push block and the bearing to retract simultaneously, so that the bearing does not apply pressure to the rotary turnover cover plate any more, the pressure of the rotary turnover cover plate above the push rod and the sealing valve plate is lost, the sealing valve plate can be opened by upward movement within a millisecond range due to the superposition of the pressure of the air pressure on the sealing valve plate and the stretching energy storage of the energy storage spring, and the opening action of the whole mechanism is finished by stopping the resistance when the traction disc moves to the shock absorption cushion block.
The invention relates to a multiplex millisecond-level rapid decompression test system for a rapid decompression environment ground simulation device, which mainly comprises a multiplex millisecond-level rapid decompression vacuum mechanism, a safety protection valve, a vacuum storage cabin, a rapid decompression cabin, a pressure sensor and a high-frequency data acquisition system, wherein a connecting flange of the rapid decompression vacuum mechanism is respectively arranged on a reserved vacuum flange of the rapid decompression cabin and the vacuum storage cabin in a bolt connection mode, the closing movement direction of the valve is the high-pressure side of the rapid decompression cabin, a side flange is connected with the low-pressure side vacuum storage cabin, the middle part of the rapid decompression vacuum mechanism is connected with a decompression (pipeline) channel and the safety protection valve in a bolt connection mode, the pressure sensor is arranged on the rapid decompression cabin and the vacuum storage cabin, the data of the pressure sensor is acquired by the high-frequency data acquisition system, when the rapid decompression test is required, after the valve is closed according to the flow before, and adjusting the high-speed pressure relief cabin and the vacuum storage cabin to required pressure according to a flow required by a test, and instantly opening the mechanism to realize quick pressure relief of the airflow after giving an instruction to the quick pressure relief vacuum mechanism.
The multiplexing millisecond-level rapid pressure relief vacuum mechanism has the following beneficial effects:
(1) when the device is opened, the air pressure and the pulling force generated by the energy storage of a plurality of groups of springs are used as power sources, so that the power source of the mechanism can be ensured when the mechanism is opened, the mechanism is ensured to be opened within millisecond-order time, the strength of the power source can be changed by replacing the strength of the springs subsequently, and the function of adjusting the opening time is achieved;
(2) the device overcomes larger air pressure and spring tension by adopting a mode that the ejector rod vertically applies pressure to the sealing valve plate, is provided with the adjusting hand wheel to adjust pretightening force, uses the welding corrugated pipe to complete sealing, has no dynamic sealing structure in the whole structure, and has the advantages of good sealing performance, easy operation and the like;
(3) the device is provided with the air cylinder to complete the auxiliary closing of the mechanism, and the electromagnetic push rod is used for completing the opening action of the mechanism, so that the automation degree is high; the linear motion mode of the mechanism sealing valve plate opening and closing is high in reliability, and compared with the modes such as a turning plate and the like, the mechanism sealing valve plate is simple in structure and stronger in functionality.
Drawings
FIG. 1 is a schematic structural diagram of a rapid decompression environmental simulation test system in the prior art;
FIG. 2a is a front view of a reusable millisecond-scale rapid pressure relief vacuum mechanism for a rapid pressure relief environment ground simulation apparatus according to an embodiment of the present invention;
FIG. 2b is a side view of a reusable millisecond-scale rapid decompression vacuum mechanism for a rapid decompression environment ground simulation apparatus according to an embodiment of the present invention;
FIG. 2c is a cross-sectional view A-A of a reusable millisecond-scale vacuum mechanism for rapidly decompressing an environmental ground simulator, according to an embodiment of the present invention;
FIG. 2d is an isometric view of a reusable millisecond level rapid decompression vacuum mechanism for use in a rapid decompression environment floor simulating assembly in accordance with an embodiment of the present invention;
wherein, 11-valve seat seal assembly; 12-a roll-over relief assembly; 13-traction energy storage assembly.
FIG. 3 is a schematic diagram of a seat seal assembly in accordance with one embodiment of the present invention;
wherein, 111-the valve body; 112-a sealing valve plate; 113-valve plate vacuum seal ring; 114-welding the bellows; 115-valve seat vacuum seal ring;
FIG. 4 is a schematic diagram of a flip-flop pressure relief assembly according to an embodiment of the present invention;
wherein, 121-overturning the base; 122-circular top plate; 123-turning over the rotating shaft; 124-flip cover plate; 125-belt shaft adjusting handwheel; 126-a bearing; 127-locking push block, 128-electromagnetic push rod; 129-locking support; 130-bearing retainer ring.
FIG. 5 is a schematic diagram of a traction energy storage assembly according to an embodiment of the present invention;
wherein, 131-lower fixed plate; 132-upright post fixing base; 133-valve stem fixing seat; 134-support columns; 135-upper fixing plate; 136-a traction cylinder; 137-ejector rod, 138-damping cushion block; 139-energy storage spring; 140-pulling the disks.
FIG. 6 is a schematic structural diagram of a rapid pressure relief vacuum test system for a rapid pressure relief environment ground simulation apparatus according to an embodiment of the present invention;
wherein, 1-multiplex millisecond level rapid decompression vacuum mechanism; 2-rapid pressure relief; 3-a pressure relief channel; 4-a safety protection valve; 5-a pressure sensor; 6-a high frequency data acquisition system; 7-vacuum storage cabin.
Detailed Description
The reusable millisecond-scale rapid decompression vacuum mechanism and the rapid decompression testing system of the present invention are described in detail below with reference to the accompanying drawings, but the description is only exemplary and is not intended to limit the scope of the present invention in any way.
Referring to fig. 2, fig. 2a is a front view of a reusable millisecond-level rapid pressure relief vacuum mechanism for a rapid pressure relief environment ground simulation apparatus according to an embodiment of the present invention; FIG. 2b is a side view of a reusable millisecond-scale rapid decompression vacuum mechanism for a rapid decompression environment ground simulation apparatus according to an embodiment of the present invention; FIG. 2c is a cross-sectional view A-A of a reusable millisecond-scale vacuum mechanism for rapidly decompressing an environmental ground simulator, according to an embodiment of the present invention; fig. 2d is an isometric view of a multiplexed millisecond level rapid decompression vacuum mechanism for a rapid decompression environmental floor simulation apparatus according to an embodiment of the present invention. As shown in the figure, the multiplex millisecond-level rapid pressure relief vacuum mechanism for the rapid pressure relief environment ground simulation device comprises a valve seat sealing component 11; inverting the pressure relief assembly 12; a traction energy storage assembly 13. Referring to fig. 2, the valve seat sealing assembly 11 is an integral welded vacuum angle valve structure, a lower fixing plate of the traction energy storage assembly 13 is integrally installed with a valve body of the valve seat sealing assembly 11 in a bolt connection manner, and an integral valve rod on a sealing valve plate in the valve seat sealing assembly 11 is connected with an ejector rod in the traction energy storage assembly 13 in a bolt connection manner. The overturning pressure relief assembly 12 is mounted on an upper fixing plate of the traction energy storage assembly 13 in a bolt connection or welding mode.
FIG. 3 is a schematic diagram of the valve seat seal assembly of the present invention, including: a valve body (111); a seal valve plate (112); a valve plate vacuum seal ring (113); welding the bellows (114); a valve seat vacuum sealing ring (115). The valve body (111) is in an integrally welded vacuum angle valve form, a vacuum flange connector is reserved at the side part and the bottom part, a sealing groove is reserved at the top part, and a valve seat vacuum sealing ring (115) is installed in the sealing groove; a sealing valve plate (112) is arranged in the valve main body (111), an integrated valve rod is arranged at the upper part of the sealing valve plate, a sealing groove is arranged on the lower sealing surface, and a valve plate vacuum sealing ring (113) is arranged in the sealing groove; the sealing valve plate (112) and the welding corrugated pipe (114) are welded at the lower part, the valve main body (111) and the welding corrugated pipe (114) are connected through bolts and clamp the valve seat vacuum sealing ring (115) in the middle, and the welding corrugated pipe (114) can realize complete sealing of the valve main body (111) and the upper outer space after connection. When the sealing valve plate (112) is subjected to downward pretightening force, the valve plate vacuum sealing ring (113) is compressed to realize sealing, and two welding flanges of the valve main body (111) can be completely separated.
Fig. 4 is a schematic structural view of the roll-over pressure relief assembly (12) of the present invention, comprising: a turning base (121); a circular top plate (122); a turning rotating shaft (123); a flip cover (124); a belt shaft adjusting hand wheel (125); a bearing (126); a locking push block (127); an electromagnetic pushrod (128); a locking support (129); a bearing retainer ring (130). The overturning base (121), the electromagnetic push rod (128) and the locking support (129) in the overturning pressure relief assembly (12) are fixed on a fixing plate (135) on the traction energy storage assembly (13) in a bolt connection or direct welding mode. Upset base (121) and upset apron (124) in upset pressure release subassembly (12) are connected by upset pivot (123) and are constituteed the tilting mechanism, and circular roof (122), tape spool adjusting hand wheel (125) pass through bolted connection and an organic whole, and tape spool adjusting hand wheel (125) pivot also is threaded connection mode with upset apron (124), and the accessible is rotatory tape spool adjusting hand wheel (125) and is realized the height stroke and adjust. The bearing (126), the locking push block (127), the locking support (129) and the bearing retainer ring (130) are assembled and integrated, and the locking push block (127) is linked with the electromagnetic push rod (128) and realizes the left and right movement of the bearing (126) through the electromagnetic push rod (128).
Fig. 5 is a schematic structural view of the traction energy storage assembly (13) of the invention, comprising: a lower fixing plate (131); a column fixing base (132); a valve rod fixing seat (133); a support column (134); an upper fixing plate (135); a traction cylinder (136); a top bar (137); a cushion block (138); an energy storage spring (139); a traction disc (140). Wherein the traction energy storage component (13) is formed by connecting a lower fixing plate (131), 4 supporting upright posts (134) and an upper fixing plate (135) into a whole through an upright post fixing seat (132). The valve rod fixing seat (133) is installed on the upper portion of the lower fixing plate (131), the damping cushion block (138) is installed on the lower portion of the upper fixing plate (135), the ejector rod (137) penetrates through the valve rod fixing seat (133) and the damping cushion block (138) to be installed in the middle, and the valve rod fixing seat and the damping cushion block are connected with the integrated valve rod of the sealing valve plate (112) in a threaded mode and integrated after the valve seat sealing assembly (11) and the traction energy storage assembly (13) are installed in a. 2 sets of traction cylinders (136) are arranged above the upper fixing plate (135). The upper ends of the 4 energy storage springs (139) are connected to the upper fixing plate (135), the lower ends of the 4 energy storage springs are fixed to the traction disc (140), and the traction disc (140) is connected with the ejector rod (137) into a whole in a welding mode.
When the mechanism needs to be closed, the traction cylinder (136) moves downwards to draw the mandril (137) and the traction disc (140) to move downwards in a linear mode integrally, and meanwhile the energy storage spring (139) achieves stretching energy storage. After the drag cylinder (136) is moved downward into position, the roll-over cover (124) is rotated to a closed position such that the bearing (126) is pressed over the roll-over cover (124). At the moment, the closing of the mechanism is realized by downward force transmission of the bearing (126), the turnover cover plate (124), the ejector rod (137) and the sealing valve plate (112), and after the closing, the pre-tightening force of the sealing valve plate (112) can be adjusted until the valve is completely closed by adjusting the belt shaft adjusting hand wheel (125). After the valve is completely closed, the traction cylinder (136) is lifted upwards to the original position.
When the mechanism needs to be opened, the electromagnetic push rod (128) retracts to drive the locking push block (127) and the bearing (126) to retract simultaneously, so that the bearing (126) does not press the rotating flip cover plate (124) any more. At the moment, the ejector rod (137) and the sealing valve plate (112) lose the pressure of the upper rotating turnover cover plate (124), the sealing valve plate (112) can finish upward movement and opening within a millisecond range due to the superposition of the pressure of air pressure on the sealing valve plate (112) and the stretching energy storage of the energy storage spring (139), and the opening action of the whole mechanism is finished by stopping resistance force when the traction disc (140) moves to the damping cushion block (138).
FIG. 6 is a schematic diagram of a rapid decompression test system of the present invention, comprising: a multiplex millisecond-level rapid pressure relief vacuum mechanism (1); a rapid relief chamber (2); a pressure relief (pipe) channel (3); a safety protection valve (4); a pressure sensor (5); a high frequency data acquisition system (6); a vacuum reserve tank (7). Wherein two flange joints of quick pressure release vacuum mechanism (1) are installed respectively on vacuum flange is reserved in quick pressure release cabin (2) and vacuum storage cabin (7) through bolted connection mode, the direction of general valve closure motion is quick pressure release cabin (2) high pressure side, side flange joint low pressure side vacuum storage cabin (7), the centre is connected with pressure release (pipeline) passageway (3) and safety protection valve (4) through bolted connection's mode, install pressure sensor (5) on quick pressure release cabin (2) and the vacuum storage cabin (7), pressure sensor (5) data are gathered through high frequency data acquisition system (6).
When a rapid decompression test is required, after the valve is closed according to the flow before the test, the high-speed decompression chamber (2) and the vacuum storage chamber (7) are adjusted to required pressure according to the flow required by the test, and the mechanism is opened instantly after the rapid decompression vacuum mechanism (1) is instructed to realize rapid decompression of air flow.
The invention discloses a multiplexing millisecond-level rapid pressure relief vacuum mechanism and a rapid pressure relief test system, which are oriented to the requirements of a rapid pressure relief environment ground simulation device, wherein the mechanism has the advantages of high sealing performance, repeated opening, high control precision, high reliability and the like. The rapid decompression environment ground simulation device formed by the invention can realize the instant opening of the mechanism within the millisecond range, and is used for checking the adaptability and reliability of airborne equipment to the rapid decompression environment, developing relevant emergency treatment and escape capability training of pilots and astronauts, and the like. The device can be extended and applied to other related test or test equipment needing to control the instantaneous on-off of the air flow.
Although particular embodiments of the invention have been described and illustrated in detail, it should be understood that various equivalent changes and modifications could be made to the above-described embodiments in accordance with the spirit of the invention, and the resulting functional effects would still fall within the scope of the invention, without departing from the spirit of the description and the accompanying drawings.
Claims (8)
1. A quick pressure release vacuum mechanism of multiplexing formula millisecond level for quick decompression environment ground analogue means, including disk seat seal subassembly, upset pressure release subassembly, pull energy storage subassembly, the bottom plate that pulls energy storage subassembly passes through bolted connection mode and disk seat seal subassembly's valve main part installation integration in an organic whole, and the integral type valve rod on the sealed valve plate passes through the mode of spiro union and is connected with the ejector pin in pulling the energy storage subassembly among the disk seat seal subassembly, and upset pressure release subassembly passes through bolted connection or welded mode and sets up in the upper fixed plate who pulls the energy storage subassembly.
2. The multiplexed millisecond rapid venting vacuum mechanism of claim 1, wherein the seat seal assembly comprises: the valve comprises a valve body, a sealing valve plate, a valve plate vacuum sealing ring, a welding corrugated pipe and a valve seat vacuum sealing ring, wherein the valve body is in an integrated welding vacuum angle valve form, a vacuum flange connector is reserved at the side part and the bottom part, a sealing groove is reserved at the top part, and the valve seat vacuum sealing ring is arranged in the sealing groove; a sealing valve plate is arranged in the valve main body, an integrated valve rod is arranged at the upper part of the sealing valve plate, a sealing groove is arranged on the lower sealing surface, and a valve plate vacuum sealing ring is arranged in the sealing groove; the sealing valve plate and the welding corrugated pipe are in a lower welding mode, the valve main body and the welding corrugated pipe are connected through bolts and clamp the valve seat vacuum sealing ring in the middle, and the corrugated pipe can be welded after connection to realize complete sealing of the valve main body and the outer space of the upper side.
3. The multiplexing millisecond rapid pressure relief vacuum mechanism of claim 1, wherein when the sealing valve plate is subjected to a downward pre-tightening force, the valve plate vacuum sealing ring is compressed to realize sealing, so that the two welding flanges of the valve main body can be completely separated.
4. The multiplexed millisecond rapid venting vacuum mechanism of any one of claims 1 to 3, wherein the rollover venting assembly comprises: the turnover base, the circular top plate, the turnover rotating shaft, the turnover cover plate, the belt shaft adjusting hand wheel, the bearing, the locking push block, the electromagnetic push rod, the locking support and the bearing retainer ring, the turnover base, the electromagnetic push rod and the locking support in the turnover pressure relief assembly are fixed on the upper fixing plate of the traction energy storage assembly in a bolt connection or direct welding mode, the turnover base and the turnover cover plate in the turnover pressure relief assembly are connected by the turnover rotating shaft to form a turnover mechanism, the circular top plate and the belt shaft adjusting hand wheel are connected and integrated through bolts, the rotating shaft of the belt shaft adjusting hand wheel and the turnover cover plate are also in a threaded connection mode, the height stroke adjustment is realized through rotating the belt shaft adjusting hand wheel, the bearing, the locking push block, the locking support and the bearing retainer ring are assembled and integrated, and the locking push block is linked with.
5. The multiplexing millisecond rapid decompression vacuum mechanism of any one of claims 1 to 3, wherein the traction energy storage assembly comprises: the traction energy storage assembly is characterized by comprising a lower fixing plate, an upright post fixing seat, a valve rod fixing seat, a supporting upright post, an upper fixing plate, a traction air cylinder, an ejector rod, a damping cushion block, an energy storage spring and a traction disc, wherein the lower fixing plate, the supporting upright post and the upper fixing plate are connected into a whole through the upright post fixing seat; two sets of traction cylinders are arranged above the upper fixing plate, the upper end of the energy storage spring is connected to the upper fixing plate, the lower end of the energy storage spring is fixed to the traction disc, and the traction disc is connected with the ejector rod into a whole in a welding mode.
6. The multiplexing millisecond-level rapid pressure relief vacuum mechanism according to claim 5, wherein when the mechanism needs to be closed, the traction cylinder moves downwards to pull the ejector rod and the traction disc to move linearly downwards integrally, meanwhile, the energy storage spring realizes stretching energy storage, and after the traction cylinder moves downwards to a proper position, the turnover cover plate is rotated to a closed state, so that the bearing is pressed above the turnover cover plate; at the moment, the closing of the mechanism is realized by downward force transmission through the bearing, the turnover cover plate, the ejector rod and the sealing valve plate, the pretightening force of the sealing valve plate can be adjusted until the valve is completely closed by adjusting the belt shaft adjusting hand wheel after the closing, and the traction cylinder is lifted upwards to the original position after the valve is completely closed.
7. A multiplex millisecond vacuum relief mechanism according to any one of claims 1 to 3, wherein when the mechanism needs to be opened, the electromagnetic push rod retracts to drive the locking push block and the bearing to retract simultaneously, so that the bearing does not apply pressure to the rotating flip cover plate any more, at this time, the push rod and the sealing valve plate lose the pressure of the rotating flip cover plate above, due to the superposition of the pressure of the air pressure on the sealing valve plate and the tensile energy storage of the energy storage spring, the sealing valve plate can be opened by moving upwards within the millisecond range, and when the traction disc moves to the shock absorption cushion block, the opening of the whole mechanism is stopped by the resistance force.
8. A multiplex millisecond rapid decompression test system for a rapid decompression environment ground simulation device mainly comprises the multiplex millisecond rapid decompression vacuum mechanism, a safety protection valve, a vacuum storage cabin, a rapid decompression cabin, a pressure sensor and a high-frequency data acquisition system according to any one of claims 1 to 7, wherein a connecting flange of the rapid decompression vacuum mechanism is respectively installed on a reserved vacuum flange of the rapid decompression cabin and the vacuum storage cabin in a bolt connection mode, the direction of valve closing movement is the high-pressure side of the rapid decompression cabin, a side flange is connected with the vacuum storage cabin at the low-pressure side, the middle part of the rapid decompression vacuum mechanism is connected with a decompression (pipeline) channel and a safety protection valve in a bolt connection mode, the pressure sensor is installed on the rapid decompression cabin and the vacuum storage cabin, the data of the pressure sensor is acquired through the high-frequency data acquisition system, when a rapid decompression test is required, after the valve is closed according to the flow before the test, the high-speed pressure relief cabin and the vacuum storage cabin are adjusted to the required pressure according to the flow required by the test, and the mechanism is opened instantly after the rapid pressure relief vacuum mechanism is instructed to achieve rapid pressure relief of the air flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011124207.1A CN112224452B (en) | 2020-10-20 | 2020-10-20 | Multiplexing type millisecond-level rapid pressure relief vacuum mechanism and rapid pressure relief test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011124207.1A CN112224452B (en) | 2020-10-20 | 2020-10-20 | Multiplexing type millisecond-level rapid pressure relief vacuum mechanism and rapid pressure relief test system |
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