Fluid sealing device and sealing method suitable for large and extra-large hatch covers

Abstract

A fluid sealing device and sealing method suitable for large and extra-large hatch covers, comprising a surrounding wall of the hatch cover, a door panel is installed on the surrounding wall through multiple hinges, the inner surface of the door panel is provided with a circle of frame, the inner edge of the frame is cooperated with a sealing oil bag, the sealing oil bag is a circular ring structure, when the door panel is closed, the sealing oil bag and the surrounding wall are tightly fitted; a hydraulic source is also fixed on the surrounding wall, the hydraulic source and the sealing oil bag are connected through two parallel oil inlet pipes and oil return pipes, a No. 1 switch valve and a No. 1 pressure sensor are installed on the oil inlet pipe, and a No. 2 switch valve and a No. 2 pressure sensor are installed on the oil return pipe, breaking through the spherical configuration of existing deep-sea hatch covers and the sealing form of conical surface fitting and O-ring compression, greatly improving the passability of the deep-sea hatch cover inlet and outlet passage, thereby enhancing the ability of high-value targets to enter the cabin.

Description

Technical Field

[0001] The present invention relates to the technical field of hatch cover sealing devices, and in particular to a fluid sealing device and a sealing method suitable for large and super-large hatch covers. Background Art

[0002] At present, the development of technologies such as marine resource development and national maritime security is gradually evolving towards the deep sea. The utilization and development of the deep seabed is an important part of deep-sea activities. The deep seabed is the main support for resource exploitation and scientific research in the civilian field, and in the field of marine security, the utilization of the deep seabed plays an irreplaceable role. There are a large number of high-value targets scattered on the deep seabed, including local mineral samples, biological samples, submarine information engineering equipment and other items with salvage value. Some high-value targets need to be transferred to manned deep-sea diving equipment in real time for analysis and research. In the deep sea, the only channel that can serve as the above-mentioned high-value targets from high-pressure seawater to manned deep-sea diving equipment is the deep-sea automatic opening and closing hatch cover.

[0003] The deep-sea automatic hatch cover can be opened and closed automatically in high-pressure seawater, and can withstand the seawater pressure of several thousand meters deep without leakage. Once leaked, it will cause seawater to flow into the manned deep-sea diving equipment at the least, and may cause a major accident in which the boat is destroyed and people are killed. The sealing structure of the hatch cover is the key to ensure safety. Due to the extremely high safety and reliability requirements of deep-sea hatch covers, the current mature practice is to adopt a hemispherical hatch cover configuration, in which the hatch cover plate and the surrounding wall are matched with a conical surface, and an O-ring is installed on the hatch cover plate. In the locked state, the O-ring is pressed against the conical surface of the surrounding wall to achieve sealing. The above method has extremely high requirements on the processing accuracy of the hatch cover and the surrounding wall, and requires close matching of the end faces. It can only be applied to hemispherical hatch covers, and the size is limited, which greatly limits the net space of the access channel and cannot complete the transfer of large high-value targets into the cabin. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a fluid sealing device and a sealing method with a reasonable structure that are suitable for large and extra-large hatch covers. Through this device, the current sealing form of hatch cover conical surface matching and O-ring compression is replaced, and a sealing structure of a fluid sealing oil bag is adopted. This structure has low processing requirements for the hatch cover end face and the surrounding wall, and can reduce the size limit of the hatch cover, which can greatly expand the passability of high-value targets in and out of the channel. Through this device, the recovery capacity of our underwater high-value targets can be greatly improved, and it has extremely strong application value.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A fluid sealing device suitable for large and extra-large hatch covers, comprising a surrounding wall of the hatch cover, a door panel is mounted on the surrounding wall via a plurality of hinges, the inner surface of the door panel is provided with a circle of frame, the inner edge of the frame is cooperated with a sealing oil bag, the sealing oil bag is in a circular ring structure, when the door panel is closed, the sealing oil bag is tightly fitted to the surrounding wall; a hydraulic source is also fixed on the surrounding wall, the hydraulic source is connected to the sealing oil bag via two parallel oil inlet pipes and oil return pipes, a No. 1 switch valve and a No. 1 pressure sensor are installed on the oil inlet pipe, and a No. 2 switch valve and a No. 2 pressure sensor are installed on the oil return pipe.

[0007] As a further improvement of the above technical solution:

[0008] The sealing oil bag and the door panel are bonded by vulcanization.

[0009] The opening in the middle of the surrounding wall is a circular, elliptical, long strip, oblong or rectangular structure.

[0010] The shape of the sealing oil bag matches the shape of the opening in the middle of the surrounding wall.

[0011] When the door panel is closed, the sealing oil bag and the surrounding wall are completely pressed and fitted together. When the door panel is opened, the sealing oil bag and the surrounding wall gradually form a linear contact and then separate.

[0012] The sealing oil bag is an integrated structure, and an interface connected with the oil inlet pipe and the oil return pipe is arranged on the sealing oil bag.

[0013] The hydraulic source adopts a hydraulic cylinder.

[0014] The hydraulic source is fixed on the surrounding wall by bolts.

[0015] A sealing method for a fluid sealing device of a large-mouth and super-large-mouth hatch cover, comprising the following steps:

[0016] Step 1: Preparation:

[0017] Open the hydraulic source and the No. 1 switch valve, fill the oil in the sealing oil bag through the oil inlet pipe, and adjust the oil pressure inside the sealing oil bag through the No. 1 pressure sensor;

[0018] Step 2: Sealing:

[0019] When the sample transfer is completed and the door panel is closed, the sealing oil bag first contacts the surrounding wall until a larger contact area is formed;

[0020] At this time, due to the pressure difference between the inside and outside of the cabin, the seawater outside the cabin will exert pressure on the door plate of the hatch cover, further compressing the sealing oil bag. At the same time, the No. 2 switch valve is opened to properly discharge some oil in the sealing oil bag through the oil return pipe, so that the sealing oil bag and the surrounding wall are completely pressed and fitted into position;

[0021] When the sealing oil bag is completely fitted with the surrounding wall and the fitting surface is large enough, stop draining the oil and close the No. 2 switch valve to keep the sealing oil bag between the door panel and the surrounding wall stable and tight, so as to achieve the sealing of the hatch cover;

[0022] Step 3: Start working:

[0023] When the door panel needs to be opened, open the hydraulic source and the No. 1 switch valve on the oil inlet pipe, and continue to inject oil into the sealing oil bag. At this time, the pressure in the sealing oil bag rises, and the interface of the sealing oil bag is deformed, causing the contact area between the sealing oil bag and the surrounding wall to gradually decrease, and finally forming a line contact. The surrounding wall and the sealing oil bag have been partially separated, and seawater can enter through the detached part, achieving pressure balance inside and outside the cabin, and the door panel can be opened.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention has a compact and reasonable structure and is easy to operate. Through the design of the sealing oil bag and implementation according to the operating method, it can break through the spherical configuration of the existing deep-sea hatch cover and the sealing form of conical surface fitting and O-ring compression, greatly improving the passability of the deep-sea hatch cover inlet and outlet channels, thereby enhancing the ability of high-value targets to enter the cabin.

[0026] The overall system composition of this device is simple, mature and reliable, and the cost of use is low, and it has strong engineering application potential.

[0027] The sealing oil bag of the present invention is an integrated structure, has a large contact area with the door panel and the surrounding wall, and has a good sealing effect.

[0028] A frame is arranged at the bottom of the door panel of the present invention, so that the frame and the sealing oil bag can be more stably fitted, the stability of the sealing surface is ensured, and the sealing effect is improved.

[0029] The sealing oil bag of the present invention can be designed and adapted according to the shape of the actual hatch enclosure, and is flexible and convenient to use.

[0030] The hydraulic system of the present invention is easy to control and flexible and convenient to use.

[0031] The invention is mainly used in the sealing device of large deep-sea hatch cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention (closed state).

[0033] Figure 2 It is the front view (closed state) of the present invention.

[0034] Figure 3 It is the hydraulic principle diagram of the present invention.

[0035] Figure 4 The hydraulic principle diagram of the present invention (the sealing oil bag is omitted).

[0036] Figure 5 It is a structural schematic diagram of the present invention (open state).

[0037] Figure 6 It is the front view (opened state) of the present invention.

[0038] Among them: 1. Door panel; 2. Hinge; 3. Frame; 4. Sealing oil bag; 5. Wall; 6. Hydraulic source; 7. Oil inlet pipe; 8. Oil return pipe; 9. Switch valve No. 1; 10. Switch valve No. 2; 11. Pressure sensor No. 1; 12. Pressure sensor No. 2. DETAILED DESCRIPTION

[0039] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0040] like Figure 1-Figure 6 As shown, the fluid sealing device of this embodiment is suitable for large-mouth and extra-large-mouth hatch covers, including a surrounding wall 5 of the hatch cover, a door panel 1 is installed on the surrounding wall 5 through a plurality of hinges 2, the inner surface of the door panel 1 is provided with a circle of frame 3, the inner edge of the frame 3 is cooperated with a sealing oil bag 4, the sealing oil bag 4 is a circular ring structure, when the door panel 1 is closed, the sealing oil bag 4 and the surrounding wall 5 are tightly fitted; a hydraulic source 6 is also fixed on the surrounding wall 5, the hydraulic source 6 is connected to the sealing oil bag 4 through two parallel oil inlet pipes 7 and oil return pipes 8, a No. 1 switch valve 9 and a No. 1 pressure sensor 11 are installed on the oil inlet pipe 7, and a No. 2 switch valve 10 and a No. 2 pressure sensor 12 are installed on the oil return pipe 8.

[0041] The sealing oil bag 4 and the door panel 1 are bonded by vulcanization.

[0042] The opening in the middle of the surrounding wall 5 is a circular, elliptical, long strip, oblong or rectangular structure.

[0043] The shape of the sealing oil bag 4 matches the shape of the opening in the middle of the surrounding wall 5 .

[0044] When the door panel 1 is closed, the sealing oil bag 4 and the surrounding wall 5 are completely pressed and fitted together. When the door panel 1 is opened, the sealing oil bag 4 and the surrounding wall 5 gradually come into linear contact and then separate.

[0045] The sealing oil bag 4 is an integrated structure, and an interface connected to the oil inlet pipe 7 and the oil return pipe 8 is provided on the sealing oil bag 4 .

[0046] The hydraulic source 6 is a hydraulic cylinder.

[0047] The hydraulic source 6 is fixed to the surrounding wall 5 by means of bolts.

[0048] The specific structure and function of the fluid sealing device for large and extra-large hatch covers of the present invention are as follows:

[0049] It mainly includes a sealing oil bag 4, a hydraulic source 6, two pressure sensors, two switch valves, an oil inlet pipe 7, an oil return pipe 8 and corresponding accessories.

[0050] The sealing oil bag 4 is bonded to the hatch cover plate (ie, the door plate 1) by vulcanization.

[0051] Among them, one end of the oil inlet pipe 7 and the oil return pipe 8 is connected to the sealing oil bag 4, and the other end is connected to the hydraulic source 6.

[0052] Among them, the switch valve and the pressure sensor are connected in series to the oil inlet pipe 7 and the oil return pipe 8.

[0053] The hydraulic source 6 is installed on the surrounding wall 5 of the hatch cover and is connected to the surrounding wall 5 by bolts.

[0054] In actual work, Figure 1 , Figure 2 and Figure 3 As shown, the sealing oil bag 4 is filled with oil through the hydraulic source 6, the switch valve, and the pressure sensor to adjust the oil pressure and oil volume in the sealing oil bag 4.

[0055] When the sample transfer is completed and the hatch cover is closed, the sealing oil bag 4 first contacts the surrounding wall 5 until a larger contact area is formed.

[0056] At this time, due to the pressure difference between inside and outside the cabin, the seawater outside the cabin will generate pressure on the door panel 1 of the hatch cover, further compressing the sealing oil bag 4. At the same time, some oil in the sealing oil bag 4 is properly discharged through the return oil pipe 8, so that the sealing oil bag 4 and the surrounding wall 5 are completely pressed and fitted into position.

[0057] When the sealing oil bag 4 is completely fitted with the surrounding wall 5 and the fitting surface is large enough, the oil discharge is stopped and the No. 2 switch valve 10 is closed to maintain the stable compression of the sealing oil bag 4 between the hatch cover door panel 1 and the surrounding wall 5 to achieve the sealing work of the hatch cover.

[0058] At the same time, the pressure of the oil in the sealing oil bag 4 is monitored in real time through the pressure sensor. If the oil pressure in the sealing oil bag 4 drops, the hydraulic source 6 is immediately opened to appropriately replenish oil to maintain the stability of the sealing surface.

[0059] When the hatch cover needs to be opened, the hydraulic source 6 and the No. 1 switch valve 9 on the oil inlet pipe 7 are opened at the same time, and the sealing oil bag 4 is continuously filled with oil. At this time, the pressure in the sealing oil bag 4 rises, and the interface of the sealing oil bag 4 is deformed, resulting in a gradual decrease in the contact area between the sealing oil bag 4 and the surrounding wall 5, and finally forming a line contact. However, due to the actual engineering processing accuracy problem, the surrounding wall 5 and the sealing oil bag 4 have been partially separated, and seawater can enter through the separated part to achieve pressure balance inside and outside the cabin, and the hatch cover can be opened.

[0060] The overall operation is convenient, and the corresponding sealing oil bag 4 can be matched according to the shape of the actual hatch cover. Due to the design of this sealing device, the hatch cover can be enlarged, thereby improving the ability of high-value targets to enter the cabin.

[0061] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A sealing method for a fluid sealing device for large and extra-large hatch covers, comprising a surrounding wall (5) of the hatch cover, characterized in that: The door panel (1) is mounted on the surrounding wall (5) via a plurality of hinges (2); the inner surface of the door panel (1) is provided with a frame (3); the inner edge of the frame (3) is provided with a sealing oil bag (4); the sealing oil bag (4) is in a circular ring structure; when the door panel (1) is closed, the sealing oil bag (4) is tightly fitted with the surrounding wall (5); a hydraulic source (6) is also fixed on the surrounding wall (5); the hydraulic source (6) is connected to the sealing oil bag (4) via two parallel oil inlet pipes (7) and an oil return pipe (8); a No. 1 switch valve (9) and a No. 1 pressure sensor (11) are mounted on the oil inlet pipe (7); a No. 2 switch valve (10) and a No. 2 pressure sensor (12) are mounted on the oil return pipe (8); The steps are as follows: Step 1: Preparation: The hydraulic source (6) and the No. 1 switch valve (9) are opened, and the oil inlet pipe (7) is used to fill the inside of the sealing oil bag (4) with oil, and the oil pressure inside the sealing oil bag (4) is adjusted through the No. 1 pressure sensor (11); Step 2: Sealing: When the sample transfer is completed and the door panel (1) is closed, the sealing oil bag (4) first contacts the surrounding wall (5) until a larger contact area is formed; At this time, due to the pressure difference between the inside and outside of the cabin, the seawater outside the cabin will exert pressure on the hatch cover door plate (1), further compressing the sealing oil bag (4). At the same time, the No. 2 switch valve (10) is opened to appropriately discharge some oil in the sealing oil bag (4) through the oil return pipe (8), so that the sealing oil bag (4) and the surrounding wall (5) are completely pressed and fitted into position; When the sealing oil bag (4) and the surrounding wall (5) are completely fitted together and the fitting surface is large enough, the oil discharge is stopped and the No. 2 switch valve (10) is closed to keep the sealing oil bag (4) between the door plate (1) and the surrounding wall (5) stably pressed, thereby achieving the sealing work of the hatch cover; Step 3: Start working: When the door panel (1) needs to be opened, the hydraulic source (6) and the No. 1 switch valve (9) on the oil inlet pipe (7) are opened to continue to inject oil into the sealing oil bag (4). At this time, the pressure in the sealing oil bag (4) rises, and the interface of the sealing oil bag (4) is deformed, resulting in a gradual decrease in the contact area between the sealing oil bag (4) and the surrounding wall (5), and finally forming a line contact. The surrounding wall (5) and the sealing oil bag (4) are partially separated, and seawater can enter through the separated part, achieving pressure balance inside and outside the cabin, and the door panel (1) can be opened.

2. The sealing method of the fluid sealing device for large and extra-large hatch covers according to claim 1, characterized in that: The sealing oil bag (4) and the door panel (1) are bonded together by vulcanization.

3. The sealing method of the fluid sealing device for large and extra-large hatch covers according to claim 1, characterized in that: The opening in the middle of the surrounding wall (5) is in the shape of a circle, an ellipse, a long strip, an oblong or a rectangular structure.

4. The sealing method of the fluid sealing device for large and extra-large hatch covers according to claim 1, characterized in that: The shape of the sealing oil bag (4) matches the shape of the opening in the middle of the surrounding wall (5).

5. The sealing method of the fluid sealing device for large and extra-large hatch covers according to claim 1, characterized in that: When the door panel (1) is closed, the sealing oil bag (4) and the surrounding wall (5) are completely pressed and fitted together; when the door panel (1) is opened, the sealing oil bag (4) and the surrounding wall (5) gradually come into linear contact and then separate.

6. The sealing method of the fluid sealing device for large and extra-large hatch covers according to claim 1, characterized in that: The sealing oil bag (4) is an integrated structure, and an interface connected to the oil inlet pipe (7) and the oil return pipe (8) is provided on the sealing oil bag (4).

7. The sealing method of the fluid sealing device for large and extra-large hatch covers according to claim 1, characterized in that: The hydraulic source (6) is a hydraulic cylinder.

8. The sealing method of the fluid sealing device for large and extra-large hatch covers according to claim 1, characterized in that: The hydraulic source (6) is fixed to the surrounding wall (5) by means of bolts.

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