Space cabin door system and rapid leak rate detection method thereof

Abstract

The invention discloses a space cabin door system and a rapid leak rate detection method thereof, and belongs to the technical field of reliability and safety design of space cabin doors. The cabin door system comprises a sealed cabin door, a pressure point switch and a cabin door rapid leak detector, the end face of a door body of the sealed cabin door is sleeved with a sealing ring inner ring and a sealing ring outer ring, when the cabin door is closed, the two sealing rings make contact with the sealing face of the door frame in a pressed mode, and a sealed cavity is formed between the two sealing rings and the sealing face of the door frame. The pressure point switch is arranged on the door frame and detects whether the cabin door switch acts in place or not. And the cabin door rapid leak detector inflates the sealed cavity and performs leak rate test to obtain the sealing condition of the sealing ring. Through the application of the invention, the in-place action of the cabin door can be reliably detected, the sealing performance of the cabin door can be quickly given, and a quantitative basis is provided for reliably closing the cabin door.

Description

Technical Field

[0001] The invention relates to a space hatch system and a rapid leakage rate detection method thereof, belonging to the technical field of reliability and safety design of space hatches. Background Art

[0002] As a movable component, the hatch is sealed by non-metallic sealing materials, and its sealing performance has become a very important part of the sealing performance of the entire space station. Therefore, a special testing equipment for the sealing performance of manned spacecraft hatches came into being, namely the hatch rapid leak detector. After the hatch is closed, a small space will be formed between the two sealing rings on the door body and the door frame. The leak detector innovatively utilizes the unique structure of the hatch. When working, a certain amount of detection gas is filled into the small space, and the sealing condition of the hatch is judged by monitoring the pressure change in the small space. At present, from the existing public information, there are no hatch rapid leak detector products on foreign space stations and aircraft. Only on the Russian TM spacecraft, in order to monitor the leakage of the docking point of the two spacecraft, a "docking point sealing monitoring device" was developed, which uses a pressure sensor to measure the sealing condition of the docking point. Its principle should be roughly the same as that of the hatch rapid leak detector.

[0003] In order to avoid leakage in the hatch in the space, it is necessary to check the two sealing rings after the hatch is closed. The existing leak detection device needs to fill the entire cabin with sufficient gas, which takes a long time, is complicated to operate, and the reliability of the leak detection result is low. Summary of the invention

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to propose a space hatch system and a rapid leakage rate detection method thereof, and to reliably detect whether the hatch is closed in place and its sealing performance through the design of a pressure point switch and a portable hatch rapid leak detector.

[0005] The technical solution of the present invention is:

[0006] A space hatch system, comprising a sealed hatch, a pressure point switch and a hatch rapid leak detector;

[0007] The sealed hatch door comprises a door body assembly, a door frame and a door shaft assembly; the end face of the door frame is provided with a sealing surface and a leak detection pipeline with one end located on the surface of the sealing surface; the door body assembly comprises an inner ring of a sealing ring, an outer ring of a sealing ring, a connecting rod mechanism and a door body, the inner ring of the sealing ring and the outer ring of the sealing ring are sleeved on the end face of the door body from the inside out, and when the hatch door is closed, the two sealing rings are in contact and pressed against the sealing surface of the door frame, and a sealed cavity is formed between the two sealing rings and the sealing surface of the door frame; the door shaft assembly is connected to the door body;

[0008] The pressure point switch is set on the door frame to detect whether the hatch door is fully opened or closed;

[0009] The hatch door quick leak detector is connected to the other end of the leak detection pipeline. After the sealed hatch door is closed, air is inflated into the sealed cavity through the leak detection pipeline and a leak rate test is performed to obtain the sealing condition of the sealing ring and confirm whether the sealed hatch door is reliably closed.

[0010] Furthermore, the pressure point switch includes a lever gear, a shaft, a torsion spring, a touch rod, a base, a roller, a gear shaft, and a micro switch;

[0011] The roller is connected to the lever end of the lever gear, and the lever gear rotates around the axis; the gear end of the lever gear meshes with the gear on the gear shaft, and a torsion spring is installed on the shaft of the gear shaft, and a touch rod is connected to the torsion spring;

[0012] The micro switch is mounted on a base, and the base is mounted on a door frame assembly; one end of the touch rod contacts the micro switch, and the torque of the torsion spring is greater than the force generated by the micro switch contact on the touch rod.

[0013] Furthermore, when the cabin door is in the open state, the lever end of the lever gear of the cabin door pressure point switch is not pressed by the cabin door body assembly, the touch rod maintains its initial position under the action of the torsion spring, and the microswitch sends an electrical signal that the cabin door is open; when the cabin door is closed, the cabin door body assembly contacts and presses the roller of the pressure point switch, the lever gear rotates around the axis, and the displacement and torque are transmitted to the gear shaft through the gear end. The gear shaft is pressed against the touch rod through the torsion spring, and the rotation of the gear shaft drives the rotation of the touch rod. The touch rod compresses the contacts of the microswitch, and the microswitch sends an electrical signal of the closed state.

[0014] Furthermore, the rapid leak detector for the hatch door includes a housing, a gas storage bottle, a solenoid valve, a pressure sensor, an electronic control unit, an inflatable component and an external component;

[0015] The gas cylinder, solenoid valve, pressure sensor, electronic control unit, and charging assembly are located inside the shell. The external assembly is the external interface of the shell. The external assembly is connected to the leak detection pipeline on the door frame. The outlet of the gas cylinder is connected to the external assembly through the internal pipeline. The solenoid valve is arranged on the internal pipeline and works in a pulse mode under the control of the electronic control unit.

[0016] The pressure sensor is used to detect the pressure of the leak detection chamber after the inflation reaches the threshold pressure;

[0017] The inflation assembly is connected to the inlet of the gas cylinder, and the atmosphere in the cabin is compressed and then filled into the gas cylinder.

[0018] Furthermore, the external component includes a quick-disconnect interface and a leak detection hose; the gas cylinder outlet is connected to the leak detection hose and the quick-disconnect interface in sequence through an internal pipeline, and the other end of the quick-disconnect interface is connected to the leak detection pipeline located on the door frame.

[0019] Furthermore, the hatch door rapid leak detector also includes a one-way valve installed on the pipeline between the inflation component and the gas storage cylinder to prevent gas backflow.

[0020] Furthermore, the door shaft assembly includes a door shaft, a torsion spring, and a floating retaining spring; the door shaft is connected to the door body through the torsion spring, and the floating retaining spring supports the door shaft. When the cabin door is closed, the door shaft presses the floating retaining spring to contract, causing the door body to move horizontally, and the two sealing rings are in contact and pressed against the sealing surface of the door frame assembly.

[0021] Furthermore, when closing the door, the door body first rotates and then moves horizontally. The specific method is as follows:

[0022] When a closing command is issued, the external force compresses the torsion spring, and the door body rotates along the door axis until it is in a pre-compression state;

[0023] In the pre-tightening state, the connecting rod mechanism rotates, and a cam is provided at the end of the connecting rod mechanism. The cam slides into the slideway, and the door body generates a downward pressing force. The door shaft compresses the floating retaining spring to contract, and the door body moves horizontally, evenly compressing the double-pass sealing ring to press the sealing surface of the door frame assembly.

[0024] Furthermore, a plurality of pressure point switches are placed on the door frame assembly to improve the accuracy of detecting whether the door has been moved into place.

[0025] A method for rapid leak rate detection of a space hatch system, comprising:

[0026] Step 1: First, pulse-inflate the sealed cavity formed by the two sealing rings and the sealing surface of the door frame, and judge whether the cavity pressure can be filled to the pre-charge pressure within the specified number of times, so as to make the fastest judgment on the maximum leakage rate. If it is judged that the sealing is abnormal, the detection is terminated and the conclusion of incomplete closure is given; if it is judged that the sealing is good, execute step 2;

[0027] Step 2: Maintain the pressure of the sealed cavity. By comparing the pressure drop of the sealed cavity pressure collected within the set time period, a relatively fast judgment of serious leakage rate exceeding the standard is completed; if it is judged that the seal is abnormal, the detection is terminated and a conclusion of inadequate closure is given; if it is judged that the seal is good, step 3 is executed;

[0028] Step 3: After judging that the leakage rate is seriously exceeded, start the leakage rate calculation and judgment; the rapid leak detector of the cabin door continues to collect the pressure of the sealed cabin within the specified time period and calculates the real-time leakage rate; compare the real-time leakage rate with the over-limit leakage rate index. If five consecutive real-time leakage rates exceed the over-limit leakage rate, it is considered that the leakage rate exceeds the standard, the detection is terminated and the conclusion of inadequate closure is given; if the leakage rate does not exceed the standard, the detection is terminated and the conclusion of inadequate closure is given.

[0029] The advantages of the present invention compared with the prior art are:

[0030] (1) The present invention constructs a hatch system that can detect whether the hatch is closed and sealed, which consists of a sealed hatch, a pressure point switch and a portable hatch rapid leak detector. The advantages of this system are: the three pressure point switches can reliably detect whether the hatch is in place through "three out of two", and then the rapid leak detector can quickly give the sealing performance of the hatch through a leak rate test, providing a quantitative basis for whether the hatch is reliably closed.

[0031] (2) The present invention realizes the action sequence of "rotation first and then translation" during the closing process of the hatch door through the hatch door mechanism design: first, the astronaut rotates the hatch door to the locking preparation position through the hatch door handle, and the switch rotation handle drives the connecting rod mechanism to move. The cam mechanism at the end of the connecting rod causes the hatch door body to translate. The hatch door translates and uniformly compresses the double-pass end face sealing ring to ensure the sealing performance. At the same time, the hatch door translates and triggers the three hatch door pressure point switches to give signals;

[0032] (3) The present invention adopts a "two-stage lever + torsion spring force limiter" pressure point switch design, which has an over-travel protection function, that is, it has the function of being able to adapt to different compression amounts of the door body and still stably give an in-place signal. This function can ensure that the door can stably give an in-place signal under different pressure differences;

[0033] (4) The rapid leak detector designed by the present invention is a portable plug-and-play device with its own gas cylinder and power supply, and its own display function. It does not require external power supply and gas supply. It is connected to the object to be tested through a quick disconnect, and can achieve a "one-to-many" detection function;

[0034] (5) The rapid leak detector designed by the present invention uses the space formed by the double-seal ring on the end face of the hatch to detect the leak rate. The detection time is controlled in minutes, which is short and efficient. At the same time, the product is designed with a soft portable bag with a handle, which can be hung inside the space station or fixed by Velcro, which is convenient to use and meets the ergonomic design.

[0035] (6) The portable rapid leak detector designed by the present invention can be inflated in the cabin by an air pump, and the battery can be replaced, so the product has the characteristic of being reusable. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0037] Figure 1 This is a schematic diagram of a space hatch system according to an embodiment of the present invention;

[0038] Figure 2This is a cross-sectional schematic diagram of the hatch door system in the open state A according to an embodiment of the present invention;

[0039] Figure 3 This is a cross-sectional schematic diagram of a door system in a pre-compression state B according to an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the installation position of the pressure point switch according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the working principle of the pressure point switch according to an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of the appearance of a portable leak detector according to an embodiment of the present invention;

[0043] Figure 7 This is a schematic diagram of the connection relationship between the portable leak detector and the cabin door according to an embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of the principle of a fast-acting device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0046] The present invention proposes a space hatch system, such as Figure 1 As shown, it includes a sealed cabin door 10, a pressure point switch 20 and a portable cabin door rapid leak detector 30.

[0047] The sealed cabin door 10 includes a cabin door body 16 , a door shaft 131 , a sealing ring inner ring 11 , a sealing ring outer ring 12 , a torsion spring 133 , a floating retaining spring 132 , a cabin door handle 14 , a cabin door frame 15 , a handle 181 , a connecting rod mechanism 182 , a cam 183 , and a slide 19 .

[0048] The door body 16 is connected to the door shaft 131 through a torsion spring 133, so that the door can rotate along the door shaft. Figure 2 The door shaft is supported by the floating retaining spring 132. When the door is in a closed state, applying pressure can compress the floating retaining spring 132, so that the door moves horizontally.

[0049] The inner ring 11 and the outer ring 12 of the sealing ring are installed on the door body 16. Figure 3As shown, the hatch door repeatedly contacts and presses against the sealing surface of the hatch door frame 15 as the hatch door is opened and closed, so that the cabin is sealed when the hatch door is closed. This design simplifies the sealing process, and through the redundant design of the double-channel sealing ring, a long seal is achieved during the repeated switching of the sealing state during the closing and opening of the hatch door, thereby improving the reliability and stability of the seal.

[0050] When the hatch needs to be closed, the astronaut pulls the handle 14 on the hatch so that the hatch is opened. Figure 3 Turn the open state to Figure 2 Pre-tightening state. Turn the handle 181 on the cabin door, the handle drives the connecting rod mechanism 182 to rotate, and pushes the cam 183 at the end of the connecting rod mechanism to slide into the slide 19. At this time, a downward pressing force will be generated on the entire cabin door, and the cabin door shaft 131 compresses the floating retaining spring 132 to contract, and the cabin door is tightened. This design solves the problem that the cabin door can only rotate but not move horizontally and cannot achieve uniform compression, ensures the stability and airtightness of the chamber to be tested, and thus improves the accuracy of the test. Through the application of the cabin door shaft, the rotation during opening and closing and the compound movement during the compression process are realized, and the uniform sealing of the double-layer sealing ring is achieved.

[0051] The pressure point switch 20 is installed on the door frame 15. Figure 4 , Figure 5 As shown, it includes a lever gear 21, a shaft 22, a torsion spring 23, a feeler rod 24, a base 25, a roller 26, a gear shaft 27, a micro switch 28, and a housing 29. The roller 26 is connected to the rod end of the lever gear 21, and the lever gear rotates around the shaft 22. The gear end of the lever gear 21 is meshed with the gear on the gear shaft 27, and a torsion spring 23 is installed on the shaft of the gear shaft 27, and a feeler rod 24 is connected to the torsion spring. The micro switch 28 is installed on the base 25, and one end of the feeler rod 24 contacts the micro switch 28. When the cabin door is in the open state, the lever end of the lever gear 21 of the cabin door pressure point switch is not pressed by the cabin door, and the feeler rod 24 maintains the initial position under the action of the internal torsion spring 23, and the micro switch 28 sends an electrical signal that the cabin door is open. When the door is closed, the door contacts and presses the roller 26 of the pressure point switch, the lever gear 21 rotates around the shaft 22, and the displacement and torque are transmitted to the gear shaft 27 through the gear end. The gear shaft 27 is pressed against the feeler rod 24 by a torsion spring 23. The torque of the torsion spring 23 is slightly greater than the torque generated by the contact of the micro switch 28 on the feeler rod 24, so that the contact is good, so that the rotation of the gear shaft 27 drives the rotation of the feeler rod 24, and the feeler rod 24 compresses the contact of the micro switch 28, and when the door is closed, an electrical signal of the closed state is sent.

[0052] The appearance of the portable leak detector 30 includes a quick-disconnect interface 32, a leak detection hose 33, an outer handle 34, a buckle 35, a shell 36, a display screen and an indicator light 37, a switch 38, and a battery compartment 39. The leak detector has a one-way valve, a small gas storage bottle, a solenoid valve, a pressure sensor, an electronic control unit, a leak detection pipeline, and an air charging component. Figure 2 , Figure 6 When in use, the leak detector is hung at any suitable position by a handle or a buckle, and the quick-disconnect interface is inserted into the leak detection pipe 31 reserved on the door frame 15, as shown. Figure 2 , Figure 7 As shown, the leak detection chamber 17 can be quickly leak-checked. At the same time, the pressure point switch 20 is used to timely reflect the signal of the door opening and closing status. The working principle of the quick-break interface is as follows Figure 8 As shown, the device is in a ventilated state when connected and is a self-sealing device when disconnected. When inflating, the one-way valve is used to prevent gas backflow. The electronic control unit controls the solenoid valve to inflate the leak detection chamber 17 of the inspected object in a pulse manner. After the inflation reaches the threshold pressure, leak detection begins. Since the internal pressure is higher than the outside of the leak detection chamber 17, the sealing condition of the sealing ring is detected by monitoring the change in the pressure of the leak detection chamber 17. If any of the two sealing rings leaks, it is judged as a leak when the leakage rate exceeds the given over-limit leakage rate. However, in fact, as long as one of the sealing rings is sealed properly, the sealing of the hatch / dock surface can be guaranteed. Therefore, the rapid leak detector is strict in judging the hatch / sealing surface.

[0053] In the atmospheric environment, the astronauts use the inflation assembly to compress the atmosphere in the cabin and fill the "high-pressure" gas into a small gas cylinder. After the inflation work is completed, the inflation assembly is disconnected from the leak detector. The inflated leak detector can be held by the astronauts for use in the atmosphere or vacuum environment. The leak detector and the leak detection hose 33 are connected before ascending, and the other end of the leak detection hose is a quick-break type. After connecting this end of the leak detection hose quick-break to the interface of the object to be inspected, the leak detector is turned on. The leak detector is powered by a disposable battery, and the working status and detection results are fed back through the display screen and indicator light on the panel.

[0054] The present invention realizes uniform sealing of the double-layer sealing ring between the flanges by designing the translation of the hatch, thereby ensuring the stability and airtightness of the chamber to be tested, thereby improving the accuracy of the test. After the hatch is closed and the docking surface is locked, a small annular cavity is formed between the two flange surfaces and the two sealing rings for leak detection, which shortens the detection time and improves the efficiency and effect of the detection. The hatch closing indicator switch is designed to timely reflect the signal of the hatch opening and closing status.

[0055] The method for rapid leak rate detection of the hatch system comprises:

[0056] Step 1: First, pulse-inflate the sealed cavity to determine whether the small cavity pressure can be inflated to the pre-charge pressure within the specified number of times, so as to make the fastest large leak rate determination;

[0057] Step 2: After the inflation is completed, the sealed cavity is pressurized, and a simple pressure comparison is performed within a short period of time to quickly determine whether the leakage rate exceeds the standard;

[0058] Step 3: After the serious leakage rate exceeds the limit, the leakage rate calculation and judgment begins. The cabin door rapid leak detector collects the small chamber pressure within the specified time period and calculates the real-time leakage rate based on the collection time; the real-time leakage rate is compared with the over-limit leakage rate index. If five consecutive real-time leakage rates exceed the over-limit leakage rate, the leakage rate is considered to exceed the limit;

[0059] Step 4: If the test passes the three judgment procedures of inflation judgment, serious exceeding of standard judgment and leakage rate judgment in sequence, it is considered that the leakage rate of the sealing cavity meets the requirements. Otherwise, as long as a certain stage is judged as abnormal, an abnormal result will be given and the detection process will be terminated.

[0060] The above-described embodiments are only preferred specific implementations of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A space hatch system, characterized in that: Including sealed hatch, pressure point switch and hatch quick leak detector; The sealed hatch door comprises a door body assembly, a door frame and a door shaft assembly; the end face of the door frame is provided with a sealing surface and a leak detection pipeline with one end located on the surface of the sealing surface; the door body assembly comprises an inner ring of a sealing ring, an outer ring of a sealing ring, a connecting rod mechanism and a door body, the inner ring of the sealing ring and the outer ring of the sealing ring are sleeved on the end face of the door body from the inside out, and when the hatch door is closed, the two sealing rings are in contact and pressed against the sealing surface of the door frame, and a sealed cavity is formed between the two sealing rings and the sealing surface of the door frame; the door shaft assembly is connected to the door body; The pressure point switch is set on the door frame to detect whether the hatch door is fully opened or closed; The hatch door quick leak detector is connected to the other end of the leak detection pipeline. After the sealed hatch door is closed, air is inflated into the sealed cavity through the leak detection pipeline and a leak rate test is performed to obtain the sealing condition of the sealing ring and confirm whether the sealed hatch door is reliably closed.

2. A space hatch system according to claim 1, characterized in that: The pressure point switch includes a lever gear, a shaft, a torsion spring, a contact rod, a base, a roller, a gear shaft, and a micro switch; The roller is connected to the lever end of the lever gear, and the lever gear rotates around the axis; the gear end of the lever gear meshes with the gear on the gear shaft, and a torsion spring is installed on the shaft of the gear shaft, and a touch rod is connected to the torsion spring; The micro switch is mounted on a base, and the base is mounted on a door frame assembly; one end of the touch rod contacts the micro switch, and the torque of the torsion spring is greater than the force generated by the micro switch contact on the touch rod.

3. A space hatch system according to claim 2, characterized in that: When the cabin door is in the open state, the lever end of the lever gear of the cabin door pressure point switch is not pressed by the cabin door body assembly, the touch rod maintains its initial position under the action of the torsion spring, and the micro switch sends an electrical signal that the cabin door is open; when the cabin door is closed, the cabin door body assembly contacts and presses the roller of the pressure point switch, the lever gear rotates around the axis, and the displacement and torque are transmitted to the gear shaft through the gear end. The gear shaft is pressed against the touch rod through the torsion spring, and the rotation of the gear shaft drives the rotation of the touch rod. The touch rod compresses the contacts of the micro switch, and the micro switch sends an electrical signal of the closed state.

4. A space hatch system according to claim 1, characterized in that: The hatch door rapid leak detector includes a housing, a gas storage bottle, a solenoid valve, a pressure sensor, an electronic control unit, an inflatable component and an external component; The gas cylinder, solenoid valve, pressure sensor, electronic control unit, and charging assembly are located inside the shell. The external assembly is the external interface of the shell. The external assembly is connected to the leak detection pipeline on the door frame. The outlet of the gas cylinder is connected to the external assembly through the internal pipeline. The solenoid valve is arranged on the internal pipeline and works in a pulse mode under the control of the electronic control unit; The pressure sensor is used to detect the pressure of the leak detection chamber after the inflation reaches the threshold pressure; The inflation assembly is connected to the inlet of the gas cylinder, and the atmosphere in the cabin is compressed and then filled into the gas cylinder.

5. A space hatch system according to claim 4, characterized in that: The external component includes a quick-disconnect interface and a leak detection hose; the outlet of the gas cylinder is connected to the leak detection hose and the quick-disconnect interface in sequence through an internal pipeline, and the other end of the quick-disconnect interface is connected to the leak detection pipeline located on the door frame.

6. A space hatch system according to claim 4, characterized in that: The hatch door rapid leak detector also includes a one-way valve installed on the pipeline between the inflation component and the gas storage cylinder to prevent gas backflow.

7. A space hatch system according to claim 1, characterized in that: The door shaft assembly includes a door shaft, a torsion spring, and a floating retaining spring; the door shaft is connected to the door body through the torsion spring, and the floating retaining spring supports the door shaft. When the cabin door is closed, the door shaft presses the floating retaining spring to contract, causing the door body to move horizontally, and the two sealing rings contact and press against the sealing surface of the door frame assembly.

8. A space hatch system according to claim 7, characterized in that: When closing the door, the door body first rotates and then moves horizontally. The specific method is as follows: When a closing command is issued, the external force compresses the torsion spring, and the door body rotates along the door axis until it is in a pre-compression state; In the pre-tightening state, the connecting rod mechanism rotates, and a cam is provided at the end of the connecting rod mechanism. The cam slides into the slideway, and the door body generates a downward pressing force. The door shaft compresses the floating retaining spring to contract, and the door body moves horizontally, evenly compressing the double-pass sealing ring to press the sealing surface of the door frame assembly.

9. A space hatch system according to claim 1, characterized in that: Multiple pressure point switches are placed on the door frame assembly to improve the accuracy of detecting whether the door is in place.

10. A method for rapid leak rate detection of the space hatch system according to claim 1, characterized in that: include: Step 1: First, pulse-inflate the sealed cavity formed by the two sealing rings and the sealing surface of the door frame, and judge whether the cavity pressure can be filled to the pre-charge pressure within the specified number of times, so as to make the fastest judgment on the maximum leakage rate. If it is judged that the sealing is abnormal, the detection is terminated and the conclusion of incomplete closure is given; if it is judged that the sealing is good, execute step 2; Step 2: Maintain the pressure of the sealed cavity. By comparing the pressure drop of the sealed cavity pressure collected within the set time period, a relatively fast judgment of serious leakage rate exceeding the standard is completed; if it is judged that the seal is abnormal, the detection is terminated and a conclusion of inadequate closure is given; if it is judged that the seal is good, step 3 is executed; Step 3: After judging that the leakage rate is seriously exceeded, start the leakage rate calculation and judgment; the rapid leak detector of the cabin door continues to collect the pressure of the sealed cabin within the specified time period and calculates the real-time leakage rate; compare the real-time leakage rate with the over-limit leakage rate index. If five consecutive real-time leakage rates exceed the over-limit leakage rate, it is considered that the leakage rate exceeds the standard, the detection is terminated and the conclusion of inadequate closure is given; if the leakage rate does not exceed the standard, the detection is terminated and the conclusion of inadequate closure is given.

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