Underwater high-pressure pneumatic uncovering mechanism

Abstract

The application discloses a kind of water bottom high-pressure pneumatic uncovering mechanism, including pneumatic cylinder cylinder body, push rod, piston, sealing ring, dust ring, air inlet device and pneumatic cylinder end cover;Pneumatic cylinder cylinder body both ends are open, one end is equipped with guide slot inside, push rod is along the guide slot sliding, and by the annular boss of pneumatic cylinder cylinder body inner wall limit;Push rod outer side end surface is used for with the end cover to be opened fixed;Pneumatic cylinder cylinder body other end is equipped with piston inside, piston inner side end surface and push rod inner side end surface abut;Sealing ring, dust ring are equipped between piston and pneumatic cylinder cylinder body inner wall, dust ring is close to push rod compared with sealing ring;Piston is limited by annular boss after moving in position;Pneumatic cylinder cylinder body other end is closed by pneumatic cylinder end cover, air inlet device is equipped on pneumatic cylinder end cover, for providing the power of driving piston movement.The application can solve the problem that uncovering is not sufficient under the condition that end cover is blocked by seabed silt burying, seabed topography etc.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underwater unmanned equipment, in particular to a high-pressure pneumatic uncovering mechanism on the sea floor. BACKGROUND

[0002] At present, there are many uncovering mechanisms for underwater use, but few for the sea floor. The uncovering mechanisms for underwater use include explosive bolts, pushers, gas generators and the like. The conventional underwater uncovering launching mechanism, as shown in Figure 1 , seals the underwater rocket in the cavity with an external pressure-resistant shell, the head of the shell is in a semispherical structure, and is connected with the shell through explosive bolts and a pin shaft. When launching is needed, the explosive bolts will work first, then the rocket propeller is ignited, the gas generated will cause the pressure in the cavity to rise sharply, and when the internal gas pressure is greater than the external water pressure, the semispherical head cover of the shell will be pushed open and turned around the pin shaft, and the thrust generated by the rocket head against the head cover crossbar will make the head cover turn further, as shown in Figure 2 . Finally, the rocket completely leaves the shell to complete the launching, and the shell sinks into the water. The uncovering method using high-pressure gas generated by a pyrotechnic device has a high risk coefficient and is not safe.

[0003] Another uncovering mechanism for the sea floor, as shown in Figure 3 , mainly consists of an air bag, a shell, an end cover and a sealing element. The shell, the end cover and the sealing element completely seal the air bag in the internal cavity, and the end cover is required to be opened and the air bag to be completely released from the shell during use. During use, the air source will inflate the air bag, and in order to prevent the air bag from rupturing due to excessive inflation, a pressure-limiting valve is installed on the surface of the air bag, which will open to release gas when the pressure difference between the inside and outside of the air bag reaches a certain value, so that the pressure difference between the inside and outside of the air bag is always maintained within a certain range. During the inflation of the air bag, the air bag expands to push open the end cover, and the air bag further inflates to squeeze out from the cavity to complete the whole action process, as shown in Figure 4 . Due to the seabed silt and terrain, the head of the product may be buried in the mud after falling into the seabed, causing insufficient uncovering stroke, insufficient uncovering, and difficulty in releasing the objects in the cabin after uncovering. The air source inflates the air bag, and due to the narrow space in which the air bag is squeezed in the cavity, the local pressure inside the air bag will quickly reach the opening pressure of the pressure-limiting valve, and the gas in the air bag is discharged into the cavity, causing the air bag in the cavity to rise sharply and push open the end cover. However, when the sealing element is pushed out, the gas in the cavity is discharged into the water, and the air bag continues to inflate, but the pressure-limiting valve discharges the gas in the air bag into the water until the air source is exhausted, so that the end cover cannot be completely opened and the air bag cannot be completely released from the cavity. The final state is shown in Figure 5 .

[0004] In summary, whether the cavity is inflated or the air bag is inflated, when there is sand or other obstacles outside the end cover, the sealing element on the end cover will be pushed out, and the cavity will no longer be a closed cavity, and the end cover and the cavity will only be pushed out of a gap, the end cover will be pushed out of the stroke, and the actual opening requirement (such as releasing the beacon, load, air bag, etc. in the cavity) cannot be met. SUMMARY

[0005] Therefore, the application provides a water bottom high-pressure pneumatic opening mechanism, which can solve the problem of insufficient opening under the condition that the end cover is blocked by seabed silt and seabed terrain.

[0006] The technical scheme adopted by the application is as follows:

[0007] A water bottom high-pressure pneumatic opening mechanism, comprising a pneumatic cylinder body, a push rod, a piston, a sealing ring, a dustproof ring, an air inlet device and a pneumatic cylinder end cover;

[0008] The pneumatic cylinder body is open at both ends, one end of the pneumatic cylinder body is provided with a guide groove, the push rod slides along the guide groove and is limited by the annular boss provided on the inner wall of the pneumatic cylinder body; the outer end surface of the push rod is used for fixing the end cover to be opened; the other end of the pneumatic cylinder body is provided with a piston, the inner end surface of the piston abuts against the inner end surface of the push rod; the sealing ring and the dustproof ring are arranged between the piston and the inner wall of the pneumatic cylinder body, and the dustproof ring is closer to the push rod than the sealing ring; the piston is limited by the annular boss after being moved into position; the other end of the pneumatic cylinder body is closed by the pneumatic cylinder end cover, and the pneumatic cylinder end cover is provided with an air inlet device for providing power to drive the piston to move.

[0009] Further, the butt joint end surface of the push rod has a larger cross-sectional area than the force receiving end of the piston.

[0010] Further, the butt joint end surface of the push rod is provided with a protrusion; the piston is a stepped shaft, the large-diameter section cooperates with the inner wall of the pneumatic cylinder body, and the small-diameter section is hollow inside and is clamped around the protrusion.

[0011] Further, the push rod is a three-jaw push rod.

[0012] Further, the push rod is a cylinder open at one end, and the open end faces outward.

[0013] Further, it further comprises a shell, an air bag and a sealing element; one end of the shell is open and used for sealing connection with the end cover to be opened through the sealing element, the other end of the shell is provided with a through hole in the middle for mounting the pneumatic cylinder end cover; the pneumatic cylinder body is integrated with the shell in the middle of the shell; the air bag is arranged in the shell and used for inflating and releasing after the end cover to be opened is completely opened, so as to drive the mechanism to float upwards.

[0014] Further, the air bag is two, symmetrically arranged in the shell.

[0015] Advantages:

[0016] 1. The air cylinder type cover opening method is adopted, the generated thrust can open the end cover and push it to a far stroke under the condition that the air pressure of the air source is sufficient, the problem of insufficient cover opening in the case of silt burying is solved, and the use of explosive is avoided, and the safety is improved.

[0017] Secondly, once the pressure in the air bag reaches the opening pressure of the upper limit pressure valve of the air bag, the air bag will exhaust to the outside, and the air source gas may be exhausted under the condition that the air bag is not completely released, and finally the cover cannot be opened. The air cylinder cover opening method needs less air, and the air cylinder is a closed structure without leakage, the air filled in the air cylinder does not leak into the water, and only a small amount of air is needed to push the piston away, and the air in the air cylinder after the action is completed can be used to inflate the air bag.

[0018] 2. The present application can be designed according to different use occasions to have different strokes, and the cover opening stroke is large; different cross-sectional areas of the piston can be designed according to the use requirement to achieve different cover opening thrust, and the cover opening force is large.

[0019] 3. The present application also includes an air bag, which is inflated and released after the end cover is completely opened, drives the mechanism to float and assists in recovery or serves as a beacon.

[0020] 4. The air bag of the present application is two, symmetrically arranged in the shell, which prevents one air bag from being damaged, and in this case, the other air bag can be used normally, and the reliability is high. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the prior art rocket launch cover opening mechanism.

[0022] Figure 2 It is a schematic diagram of the prior art rocket launch cover opening process.

[0023] Figure 3 It is a schematic diagram of the prior art air bag cover opening structure.

[0024] Figure 4 It is a schematic diagram of the prior art air bag cover opening process.

[0025] Figure 5 It is a schematic diagram of the final state of the air bag cover opening mechanism under the condition of silt burying.

[0026] Figure 6 It is a schematic diagram of the overall structure of the present application.

[0027] Figure 7 It is a schematic diagram of another embodiment of the present application.

[0028] Figure 8 The cover opening mechanism of the present application.

[0029] Figure 9 The push rod structure of the present application.

[0030] Wherein, 1-pneumatic cylinder body, 2-push rod, 3-dustproof ring, 4-sealing ring, 5-air inlet device, 6-piston, 7-pneumatic cylinder end cover, 8-silt. DETAILED DESCRIPTION

[0031] The present application will be described in detail below with examples and drawings.

[0032] The present application provides a kind of water bottom high pressure pneumatic cover opening mechanism, as shown in Figure 6 The pneumatic cover opening mechanism includes pneumatic cylinder body 1, push rod 2, piston 6, sealing ring 4, dustproof ring 3, air inlet device 5 and pneumatic cylinder end cover 7.

[0033] Pneumatic cylinder body 1 is open at both ends, one end is provided with a guide groove inside, push rod 2 slides along the guide groove, push rod 2 is installed from the left into the guide groove of the pneumatic cylinder, and is limited by the annular boss arranged on the inner wall of the pneumatic cylinder body 1;The outer end surface of push rod 2 is used to be fixed with the end cover to be opened;The other end of pneumatic cylinder body 1 is provided with piston 6 inside, piston 6 is installed from the right into the cylinder body, the inner end surface of piston 6 abuts against the inner end surface of push rod 2;Sealing ring 4 and dustproof ring 3 are arranged between piston 6 and the inner wall of pneumatic cylinder body 1, and dustproof ring 3 is closer to push rod 2 than sealing ring 4;The main function of dustproof ring 3 is to prevent the silt 8 under the sea from entering the position of sealing ring 4 and affecting the sealing. After piston 6 is moved into position, it is limited by the annular boss. The other end of pneumatic cylinder body 1 is closed by pneumatic cylinder end cover 7, pneumatic cylinder end cover 7 is connected on the pneumatic cylinder by screw, air inlet device 5 is arranged on pneumatic cylinder end cover 7, which is used to provide power to drive piston 6 to move, that is, to provide high pressure gas source. According to the use requirement, different cross-sectional area of piston 6 can be designed to achieve different cover opening thrust.

[0034] The cross-sectional area of the butt joint end surface of push rod 2 is greater than the cross-sectional area of the stress end of piston 6, so that the stress of the end cover to be opened is uniform. The butt joint end surface of push rod 2 is provided with a protrusion;Piston 6 is a stepped shaft, the large diameter section cooperates with the inner wall of pneumatic cylinder body 1, and the small diameter section is hollow inside, and the hollow part is clamped outside the protrusion. After piston 6 is moved into position, the step surface between the large diameter section and the small diameter section is limited on the right end surface of the annular boss. Different cover opening strokes can also be designed according to different use occasions, that is, the moving distance of piston 6, that is, the length between the right end surface of the annular boss and the step surface.

[0035] As shown in Figure 9As shown, the push rod 2 can be a three-prong push rod, including a butt joint circular table and three rod members, the butt joint circular table one end for butt joint with the piston 6, the other end circumferentially evenly provided with three rod members; the push rod 2 can also be a cylinder, one end of the cylinder is open, and the open end faces outward; the push rod 2 can also be a cylindrical rod.

[0036] In another embodiment, in order to save space, the pneumatic cover opening mechanism of the present application can be integrated into the air bag cover opening mechanism, as shown in Figure 7 As shown, the pneumatic cylinder body 1 can be integrated with the shell, and the end cover to be opened is fixed on the push rod 2 by screws. That is, the pneumatic cover opening mechanism of the present application further comprises a shell, an air bag and a sealing member; one end of the shell is open, used for sealing connection with the end cover to be opened through the sealing member, the other end of the shell is provided with a through hole in the middle for installing the pneumatic cylinder end cover 7; the pneumatic cylinder body 1 is arranged in the middle of the shell and integrated with the shell, the air bag is arranged in the shell and used for inflating and releasing after the end cover to be opened is completely opened, driving the mechanism to float up.

[0037] Preferably, the air bag is two, symmetrically arranged in the shell. Preventing one air bag from being damaged, in this case the other air bag can be used normally.

[0038] The working process is: the gas source fills the pneumatic cylinder through the air inlet device 5 to push the piston 6 to move to the left until it is limited by the annular boss, the push rod 2 is pushed by the piston 6 and the end cover to be opened is pushed open. After the end cover to be opened is completely pushed open, the air bag is inflated, and the air bag can be smoothly released from the cavity, as shown in Figure 8 After the action is completed, the gas in the pneumatic cylinder can be used to inflate the air bag, or the gas source is used to inflate the air bag.

[0039] In summary, the above is only a preferred embodiment of the present application, not for limiting the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A subsea high pressure pneumatic decap mechanism, characterized in that, The air cylinder body is open at both ends, one end of which is internally provided with a guide groove, the push rod slides along the guide groove and is limited by the annular boss provided on the inner wall of the air cylinder body; the outer end surface of the push rod is used for being fixed with the end cover to be opened; the other end of the air cylinder body is internally provided with a piston, the inner end surface of the piston abuts against the inner end surface of the push rod; the sealing ring and the dustproof ring are arranged between the piston and the inner wall of the air cylinder body, and the dustproof ring is closer to the push rod than the sealing ring; the piston is limited by the annular boss after being moved to the position; the other end of the air cylinder body is closed by the air cylinder end cover, the air cylinder end cover is provided with an air inlet device for providing power for driving the piston to move; The butt joint end surface of the push rod has a larger cross-sectional area than the force receiving end surface of the piston; The butt joint end surface of the push rod is provided with a protrusion; the piston is a stepped shaft, the large-diameter section cooperates with the inner wall of the air cylinder body, and the small-diameter section is hollow inside and is clamped on the outer periphery of the protrusion. The push rod is a three-jaw push rod.

2. The subsea high pressure pneumatic decap mechanism of claim 1, wherein, The push rod is a cylinder open at one end, and the open end faces outward.

3. The in-water high pressure pneumatic decap mechanism of claim 1, wherein, Further comprising a shell, an air bag and a sealing element; one end of the shell is open and is used for being sealingly connected with the end cover to be opened through the sealing element, the other end of the shell is provided with a through hole in the middle for mounting the air cylinder end cover; the air cylinder body is integrated with the shell in the middle of the shell; the air bag is arranged in the shell and is used for being inflated and released after the end cover to be opened is completely opened, thereby driving the mechanism to float up.

4. The in-water high pressure pneumatic decap mechanism of claim 1, wherein, The air bag is two and is symmetrically arranged in the shell.

5. The in-water high pressure pneumatic decap mechanism of claim 4, wherein, ​

Images