High-pressure gas cover opening device

Abstract

The present invention relates to a cover opening device, specifically a high-pressure gas cover opening device, in which the front end cover of the pressure cabin is sealed with the end frame to form a watertight pressure cabin structure; the pneumatic device realizes the high-pressure gas storage and release function, and when the high-pressure gas is released into the enclosed space composed of the front end cover, the end frame, the airtight flange and the load cabin, and the pressure reaches the shear strength of the shear strip, the shear strip is cut to realize the opening of the front end cover. By adapting different high-pressure gas pressures and the physical properties of the shear strip, the opening height of the front end cover can be controlled; by asymmetrically arranging the shear strip, the opening direction of the front end cover can be controlled. The present invention can open the cover by the action of high-pressure gas cutting the shear strip. The entire pneumatic device is arranged inside a normal pressure sealed environment, avoiding the influence of external environmental corrosion, etc., and can effectively control the opening height and direction of the rubber end cover as needed, and can realize the simultaneous opening of the front end cover and the load cabin cover, with good safety, reliability, controllability and environmental adaptability.

Description

Technical Field

[0001] The invention relates to a cover opening device, in particular to a high-pressure gas cover opening device, which can realize opening of one or more end covers at different heights and directions. Background Art

[0002] The ocean is rich in biological, mineral resources and energy, and has great economic and strategic value. The development and utilization of marine resources has led to the advancement of marine equipment technology. At present, marine robots have developed from single underwater vehicles to underwater unmanned system equipment that can carry a variety of mission payloads and perform specific missions and tasks. In order to adapt to mission payloads of different types and physical properties, the marine robot is equipped with a pressure cabin to provide a sealed storage environment for the mission payload at normal pressure. When the marine robot carries the mission payload and sails to the designated area, it needs to open the end cover safely and reliably, and then the mission payload completes the cabin action and performs the mission task.

[0003] At present, there are two ways to open the end cover: motor-driven and explosive bolt-driven. The motor-driven method to lock and open the end cover has a complex mechanical structure, low space utilization, poor system reliability, and a limited opening height of the end cover; if the end cover is opened to the side of the carrier through a hinge structure, not only is the mechanism complex, but it will also affect the static floating state of the carrier. The explosive bolt method to lock and open the end cover is dangerous to personnel during actual use due to the presence of pyrotechnics, and the safety of equipment transportation and storage is low; once an accident occurs, the consequences are disastrous, and the explosion process will cause certain damage to the carrier and mission payload equipment. Summary of the invention

[0004] In view of the above problems existing in the opening of the end cover of the pressure-resistant cabin of the existing marine robot, the purpose of the present invention is to provide a high-pressure gas cover opening device. The high-pressure gas cover opening device uses high-pressure gas to cut the shear strip to safely and reliably open the end cover.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] The present invention includes a pressure-resistant cabin, a pneumatic device, a load cabin and a shear strip, wherein the pneumatic device and the load cabin are respectively accommodated in a normal-pressure sealing environment in the pressure-resistant cabin, an end frame is fixedly connected to one end of the pressure-resistant cylinder of the pressure-resistant cabin, a conformal groove is provided between the front end cover of the pressure-resistant cabin and the outer side of the end frame, a shear strip is arranged in the groove, the front end cover is axially fixed by the shear strip, and the front end cover is sealed with the inner side of the end frame; the pneumatic device includes an airtight flange and at least one serial airtight structure installed on the airtight flange, the airtight flange is connected to the end frame, the load cabin is passed through the airtight flange and installed on the airtight flange, and the load cabin cover of the load cabin is connected to the front end cover; the serial airtight structure releases high-pressure gas into a closed space surrounded by the front end cover, the end frame, the airtight flange and one end of the load cabin, thereby generating internal pressure on the front end cover, the shear strip is cut when the internal pressure generated by the high-pressure gas on the front end cover is greater than the shear strength of the shear strip, and the front end cover and the load cabin cover connected to the front end cover are opened at the same time.

[0007] Wherein: the series airtight structure includes a transfer plug, a forward solenoid valve, a three-way ball valve and a high-pressure gas cylinder connected in series in sequence, the transfer plug is threadedly connected to the airtight flange, one end of the transfer plug is located in the enclosed space on one side of the airtight flange, the other end of the transfer plug is located on the other side of the airtight flange, and is connected to an interface of the forward solenoid valve, the other interface of the forward solenoid valve is connected to the first interface of the three-way ball valve, the second interface of the three-way ball valve is connected to the high-pressure gas cylinder, and the third interface of the three-way ball valve is used to release high-pressure gas to the pressure-resistant cylinder.

[0008] When there are multiple series-connected airtight structures, they are evenly distributed along the circumference of the airtight flange, and the gas pressure values ​​in the high-pressure gas cylinders in each series-connected airtight structure are the same, or different gas pressure values ​​are set in the high-pressure gas cylinders in each series-connected airtight structure.

[0009] The pneumatic device also includes a reverse solenoid valve and a pressure sensor respectively installed on the airtight flange, one end of the reverse solenoid valve is located in the closed space on one side of the airtight flange, and the other end of the reverse solenoid valve is located in the pressure-resistant cylinder on the other side of the airtight flange.

[0010] The front end cover and the inner side of the end frame are radially sealed by a pressure-resistant cabin sealing O-ring.

[0011] The load bay cover is connected to the front end cover via a rigid or flexible connector, the load bay cover and the load bay barrel are sealed via a load bay sealing O-ring, and the load bay barrel is filled with a mission payload.

[0012] The shear strip is in the shape of an integral ring, or is divided into multiple sections.

[0013] When the shear strip is divided into multiple sections, each of the shear strips is arranged asymmetrically in the groove, thereby controlling the opening direction of the front end cover.

[0014] The end of the front end cover in contact with the end frame extends radially inward, and an annular groove is provided on the side of the extension portion facing the end frame. One end of the end frame is inserted into the annular groove, and the other end is connected to the airtight flange. An O-ring sealing groove is provided on the inner side of the annular groove, and a pressure cabin sealing O-ring is placed in the O-ring sealing groove to achieve sealing with the inner side of the end frame. Conformal grooves are provided on the outer side of the end frame and the outer side of the annular groove.

[0015] The advantages and positive effects of the present invention are:

[0016] 1. The present invention adopts high-pressure gas to cut the shear strip to open the front cover, and has a reasonable structural design, high system reliability, good safety and stability.

[0017] 2. The pneumatic device composed of the high-pressure gas cylinder, solenoid valve, pressure sensor, airtight flange, etc. of the present invention is in the normal pressure sealed environment of the pressure cabin, which can effectively avoid the corrosion and other effects of the external environment on the pneumatic device, can be used for a long time, and has good environmental adaptability.

[0018] 3. The present invention sets different gas pressure values ​​in the high-pressure gas cylinder and adapts shear strips with different physical properties to achieve effective control of the opening height of the end cover; by arranging the shear strips asymmetrically in the groove, the opening direction of the end cover can be effectively controlled to prevent the end cover from falling back above the load compartment. Therefore, the system has good controllability.

[0019] 4. The present invention connects the front end cover and the payload compartment cover rigidly or flexibly, so that high-pressure gas can simultaneously open multiple end covers such as the front end cover and the payload compartment cover, thereby meeting the needs of the mission payload to go out of the cabin to perform the mission.

[0020] 5. The present invention is provided with a pressure sensor and a reverse solenoid valve. The system makes judgments and decisions based on the sensing information of the pressure sensor. When the preset judgment conditions are met, the reverse solenoid valve can be opened autonomously to release the high-pressure gas in the enclosed space, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the internal structure of the present invention;

[0022] Figure 2 It is a front view of the internal structure of the present invention;

[0023] Figure 3 It is a cross-sectional view of the internal structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the pneumatic device of the present invention;

[0025] Figure 5 for Figure 1 A partial enlarged view of the middle A;

[0026] Among them: 1 is a pressure cabin, 2 is a pneumatic device, 3 is a load cabin, 4 is a shear strip, 5 is a front end cover, 6 is a pressure cabin sealing O-ring, 7 is a switching plug, 8 is a load cabin cylinder, 9 is a gas-tight flange, 10 is a reverse solenoid valve, 11 is a high-pressure gas cylinder, 12 is a connector, 13 is a load cabin cover, 14 is an end frame, 15 is a forward solenoid valve, 16 is a three-way ball valve, 17 is a pressure sensor, 18 is a pressure cylinder, 19 is a load cabin sealing O-ring, and 20 is a groove. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] like Figures 1 to 5 As shown, the present invention includes a pressure-resistant cabin 1, a pneumatic device 2, a load cabin 3 and a shear strip 4. The pressure-resistant cabin 1 adopts a watertight pressure-resistant structure, including a pressure-resistant cylinder 18 and a front cover 5 and a rear cover respectively sealed to the front and rear ends of the pressure-resistant cylinder 18. The pneumatic device 2 and the load cabin 3 are respectively placed in a long-term reliable normal pressure sealing environment in the pressure-resistant cabin 1 to ensure normal operation; one end (i.e., the front end) of the pressure-resistant cylinder 18 of the pressure-resistant cabin 1 is fixedly connected to an end frame 14, and the front cover 5 of the pressure-resistant cabin 1 and the outer side of the end frame 14 are provided with a conformal groove 20 (i.e., the groove opened on the front cover 5 and the groove opened on the outer side of the end frame 14 together form the groove 20), and the shear strip 4 is arranged in the groove 20, and the front cover 5 is axially fixed by the shear strip 4, and the front cover 5 and the inner side of the end frame 14 are radially sealed by the pressure-resistant cabin sealing O-ring 6 to achieve a watertight pressure-resistant function. The cross section of the groove 20 in this embodiment can be designed to be rectangular or circular, which is used to fit and insert the shear strip 4.

[0029] The pneumatic device 2 of this embodiment includes an airtight flange 9 and at least one serial airtight structure installed on the airtight flange 9. The airtight flange 9 is connected to the end frame 14. The interior of the pressure-resistant cabin 1 is divided into two independent spaces by the airtight flange 9. The load cabin 3 passes through the airtight flange 9 and is installed on the airtight flange 9. The axial center line of the load cabin 3, the axial center line of the pressure-resistant cabin 1 and the axial center line of the airtight flange 9 are collinear. The load cabin cover 13 of the load cabin 3 is connected to the front end cover 5. The serial airtight structure can store high-pressure gas and release the high-pressure gas into the enclosed space surrounded by the front end cover 5, the end frame 14, the airtight flange 9 and one end of the load cabin 3, generating internal pressure on the front end cover 5. When the air pressure in the enclosed space reaches the set value, the internal pressure generated by the high-pressure gas on the front end cover 5 is greater than the shear strength of the shear strip 4, the shear strip 4 structure fails, the high-pressure gas completes the shear strip 4 in the groove 20 and is cut, and the front end cover 5 and the load cabin cover 13 connected to the front end cover 5 are opened at the same time. Since the front end cover 5 needs to be opened and cannot be fixed with screws, the shear strip 4 also serves the function of axially fixing the front end cover 5 .

[0030] The serial airtight structure of this embodiment includes a switching plug 7, a forward solenoid valve 15, a three-way ball valve 16 and a high-pressure gas cylinder 11 connected in series in sequence, the switching plug 7 is threadedly connected to the airtight flange 9, one end of the switching plug 7 is located in the closed space on one side of the airtight flange 9, the other end of the switching plug 7 is located on the other side of the airtight flange 9 and is connected to an interface of the forward solenoid valve 15, the other interface of the forward solenoid valve 15 is connected to the first interface of the three-way ball valve 16, the second interface of the three-way ball valve 16 is connected to the high-pressure gas cylinder 11, and the third interface of the three-way ball valve 16 is used to release the high-pressure gas to the pressure-resistant cylinder 18. The three-way ball valve 16 is used as a backup device. When the forward solenoid valve 15 fails and the high-pressure gas in the high-pressure gas cylinder 11 cannot be released, the third interface of the three-way ball valve 16 can be opened to release the high-pressure gas to prevent safety hazards. The high-pressure gas cylinder 11 is used to store high-pressure gas, such as air, nitrogen, etc. The pressure of the high-pressure gas can reach up to 30 MPa and is released through a serial airtight structure. The upper end of the adapter screw 7 can be directly connected to the external inflation pipe, and the inflation function of the high-pressure gas cylinder 11 can be realized without disassembling the pneumatic device 2.

[0031] The pneumatic device 2 of this embodiment also includes a reverse solenoid valve 10 and a pressure sensor 17 respectively installed on the airtight flange 9. One end of the reverse solenoid valve 10 is located in the closed space on one side of the airtight flange 9, and the other end of the reverse solenoid valve 10 is located in the pressure-resistant cylinder 18 on the other side of the airtight flange 9. The reverse solenoid valve 10, the forward solenoid valve 15, and the pressure sensor 17 are respectively connected to the system main control computer. In the normal cover opening working state, the pressure in the closed space between the airtight flange 9 and the front cover 5 should rise to a certain fixed value and then drop instantly; when the cover opening state is abnormal, when the pressure sensor 17 senses that the pressure in the closed space between the airtight flange 9 and the front cover 5 continues to rise and exceeds the threshold, it means that the cover opening device fails, and the system main control computer will autonomously decide to open the reverse solenoid valve 10 according to the preset conditions, and release the high-pressure gas in the closed space between the airtight flange 9 and the front cover 5 in reverse, so as to avoid safety hazards such as high-pressure gas explosion and improve system safety.

[0032] The pneumatic device 2 is entirely in the sealed environment of the pressure cabin 1, which prevents external environmental factors from adversely affecting the high-pressure gas cylinder 11, the three-way ball valve 16, the forward solenoid valve 15, the reverse solenoid valve 10 and the adapter plug 7. For example, it can effectively prevent the external seawater from corroding the metal structure and causing failure. Therefore, the pneumatic opening device has high reliability, good environmental adaptability, and can be used for a long time without failure.

[0033] When there are multiple series-type airtight structures, they are evenly distributed along the circumference of the airtight flange 9, and the gas pressure values ​​in the high-pressure gas cylinders 11 in each series-type airtight structure are the same, or different gas pressure values ​​are set in the high-pressure gas cylinders 11 in each series-type airtight structure. When different gas pressure values ​​are set in the high-pressure gas cylinders 11 in each series-type airtight structure, different pressure values ​​are released into the enclosed space between the airtight flange 9 and the front end cover 5, which can generate different pressures on the front end cover 5, and the shear strips 4 with different material properties, shapes and sizes are installed in the groove 20, which will generate different accelerations on the front end cover 5, and the instantaneous state of the front end cover 5 when opened is different, thereby effectively controlling the front end cover 5 to open at different heights.

[0034] The shear strip 4 of this embodiment is an integral ring shape, or the shear strip 4 is divided into multiple sections. When the shear strip 4 is divided into multiple sections, each shear strip 4 is arranged asymmetrically in the groove 20, and the opening direction of the front end cover 5 can be effectively controlled without adding complex mechanisms such as hinges, so as to prevent the front end cover 5 from falling back above the load cabin 3 and affecting the mission load from leaving the cabin. For example, a shear strip 4 can be arranged in the front, rear, and left directions of the groove 20, and after the high-pressure gas is released, the front end cover 5 will be thrown to the upper left of the pressure cabin 1.

[0035] The end of the front end cover 5 of the present embodiment that contacts the end frame 14 extends radially inward, and an annular groove is provided on the side of the extension portion facing the end frame 14. One end of the end frame 14 is inserted into the annular groove, and the other end is connected to the airtight flange 9. An O-ring sealing groove is provided on the inner side surface of the annular groove, and a pressure cabin sealing O-ring 6 is placed in the O-ring sealing groove to achieve radial sealing with the inner side of the end frame 14. A conformal groove 20 is provided on the outer side of the end frame 14 and the outer side surface of the annular groove.

[0036] The load bay cover 13 of this embodiment is connected to the front end cover 5 through a rigid or flexible connector 12 (such as a connecting ring), so that the high-pressure gas can open the front end cover 5 and the load bay cover 13 at the same time without causing additional impact on the mission payload, thereby meeting the need for the mission payload to go out of the cabin to perform the mission. The mission payload is installed in the payload bay tube 8, and the load bay cover 13 and the payload bay tube 8 are sealed by the load bay sealing O-ring 19 to prevent high-pressure gas from entering the payload bay 3 and damaging the electronic equipment of the internal mission payload.

[0037] The present invention opens the front end cover 5 by cutting the shear strip 4 with high-pressure gas, and arranges the pneumatic device 2 in the normal pressure sealed environment of the pressure cabin 1. At the same time, a high-pressure gas safety monitoring device (i.e., a pressure sensor) and a reverse release device (i.e., a reverse solenoid valve 10) are provided. Therefore, the present invention has good reliability, safety, stability and environmental adaptability.

[0038] The present invention can effectively control the opening height of the front end cover 5 by setting shear strips with different high-pressure gas pressures and different physical properties; the opening direction of the front end cover 5 can be effectively controlled by asymmetrically arranging the shear strips 4 in the groove 20; and the function of opening multiple end covers at one time can be realized by connecting the front end cover 5 and the load compartment cover 13 as a whole.

[0039] The working principle of the present invention is:

[0040] When there is a need to open the cover, the system main control computer opens the forward solenoid valve 15, and the high-pressure gas in the high-pressure gas cylinder 11 passes through the airtight channel composed of the three-way ball valve 16, the forward solenoid valve 15, and the adapter plug 7, filling the closed space composed of the front cover 5, the end frame 14, the airtight flange 9, the load compartment cover 13, and one end of the load compartment tube 8, generating internal pressure on the front cover 5, and the front cover 5 is simultaneously subjected to the axial fixing force of the shear strip 4; when the pressure generated by the high-pressure gas on the front cover 5 is greater than the shear strength of the shear strip 4, the shear strip 4 structure fails, the high-pressure gas completes the cutting of the shear strip 4 in the groove 20, and generates an acceleration process for the front cover 5, thereby realizing the opening of the front cover 5; during the opening process, if the pressure sensor 17 senses that the pressure in the closed space continues to rise and exceeds the threshold, the system main control computer will autonomously decide to open the reverse solenoid valve 10 according to the preset conditions, and release the high-pressure gas in reverse to the pressure-resistant cabin 1 on the other side of the airtight flange 9, and discharge it into the water through the one-way valve set in the pressure-resistant cabin 1 on the other side, so as to improve safety. When the front end cover 5 and the load compartment cover 13 are connected as one through the connector 12, the high-pressure gas can open the front end cover 5 and the load compartment cover 13 at the same time. Further, the shear strips 4 can be arranged asymmetrically in the grooves 20 as needed, and the gas cylinder pressure value and the physical properties of the shear strips can be set at the same time, so as to effectively control the opening direction and opening height of the front end cover 5, thereby meeting the needs of the mission payload to perform the mission out of the cabin.

[0041] The above description is only an embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A high-pressure gas cover opening device, characterized in that: The invention comprises a pressure-resistant cabin (1), a pneumatic device (2), a load cabin (3) and a shear strip (4), wherein the pneumatic device (2) and the load cabin (3) are respectively accommodated in a normal pressure sealed environment in the pressure-resistant cabin (1), one end of a pressure-resistant cylinder (18) of the pressure-resistant cabin (1) is fixedly connected to an end frame (14), a front end cover (5) of the pressure-resistant cabin (1) and the outer side of the end frame (14) are provided with a conformal groove (20), the groove (20) contains a shear strip (4), the front end cover (5) is axially fixed by the shear strip (4), and the front end cover (5) is sealed with the inner side of the end frame (14); the pneumatic device (2) comprises an airtight flange (9) and at least one series connection device installed on the airtight flange (9); The invention discloses a series-type airtight structure, wherein the airtight flange (9) is connected to the end frame (14), the load compartment (3) passes through the airtight flange (9) and is installed on the airtight flange (9), and the load compartment cover (13) of the load compartment (3) is connected to the front end cover (5); the series-type airtight structure releases high-pressure gas into a closed space surrounded by the front end cover (5), the end frame (14), the airtight flange (9) and one end of the load compartment (3), thereby generating internal pressure on the front end cover (5); the shear strip (4) is cut when the internal pressure generated by the high-pressure gas on the front end cover (5) is greater than the shear strength of the shear strip (4), and the front end cover (5) and the load compartment cover (13) connected to the front end cover (5) are opened at the same time.

2. The high-pressure gas cover opening device according to claim 1, characterized in that: The series airtight structure comprises a connecting plug (7), a forward solenoid valve (15), a three-way ball valve (16) and a high-pressure gas cylinder (11) which are connected in series in sequence. The connecting plug (7) is threadedly connected to the airtight flange (9). One end of the connecting plug (7) is located in a closed space on one side of the airtight flange (9). The other end of the connecting plug (7) is located on the other side of the airtight flange (9) and is connected to an interface of the forward solenoid valve (15). The other interface of the forward solenoid valve (15) is connected to a first interface of the three-way ball valve (16). The second interface of the three-way ball valve (16) is connected to the high-pressure gas cylinder (11). The third interface of the three-way ball valve (16) is used to release high-pressure gas to the pressure-resistant cylinder (18).

3. The high-pressure gas cover opening device according to claim 2, characterized in that: When there are multiple series-connected airtight structures, they are evenly distributed along the circumference of the airtight flange (9), and the gas pressure values ​​in the high-pressure gas cylinders (11) in each of the series-connected airtight structures are the same, or different gas pressure values ​​are set in the high-pressure gas cylinders (11) in each of the series-connected airtight structures.

4. The high-pressure gas cover opening device according to claim 1, characterized in that: The pneumatic device (2) also includes a reverse solenoid valve (10) and a pressure sensor (17) respectively mounted on the airtight flange (9), one end of the reverse solenoid valve (10) is located in a closed space on one side of the airtight flange (9), and the other end of the reverse solenoid valve (10) is located in a pressure-resistant cylinder (18) on the other side of the airtight flange (9).

5. The high-pressure gas cover opening device according to claim 1, characterized in that: The front end cover (5) and the inner side of the end frame (14) are radially sealed via a pressure-resistant cabin sealing O-ring (6).

6. The high-pressure gas cover opening device according to claim 1, characterized in that: The load compartment cover (13) is connected to the front end cover (5) via a rigid or flexible connector (12); the load compartment cover (13) and the load compartment cylinder (8) are sealed via a load compartment sealing O-ring (19); and the load compartment cylinder (8) contains a mission payload.

7. The high-pressure gas cover opening device according to claim 1, characterized in that: The shear strip (4) is in the shape of an integral circular ring, or the shear strip (4) is divided into multiple sections.

8. The high-pressure gas cover opening device according to claim 7, characterized in that: When the shear strip (4) is divided into multiple sections, each of the shear strips (4) is arranged asymmetrically in the groove (20), thereby controlling the opening direction of the front end cover (5).

9. The high-pressure gas cover opening device according to claim 1, characterized in that: The end of the front end cover (5) in contact with the end frame (14) extends radially inward, and an annular groove is provided on the side of the extension portion facing the end frame (14). One end of the end frame (14) is inserted into the annular groove, and the other end is connected to the airtight flange (9). An O-ring sealing groove is provided on the inner side of the annular groove, and a pressure-resistant cabin sealing O-ring (6) is arranged in the O-ring sealing groove to achieve sealing with the inner side of the end frame (14). A conformal groove (20) is provided on the outer side of the end frame (14) and the outer side of the annular groove.

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