CN212133991U - Safety pressure relief mechanism of closed cabin of underwater detector - Google Patents

Abstract

The invention discloses a safe pressure relief mechanism of a closed cabin body of an underwater detector, which solves the problem of how to ensure that the pressure relief of the closed cabin body is carried out in time when the pressure in the cabin is over-pressure. The hole seat is arranged on the closed shell, the pressure relief barrel is installed on the hole seat, a barrel opening of the pressure relief barrel is arranged on the hole seat, a barrel body of the pressure relief barrel is arranged in the closed shell, a fire plug is arranged in the barrel opening of the pressure relief barrel, a pre-pressing spring is arranged between the barrel bottom and the fire plug, the purpose that the barrel opening is sealed by a piston is achieved by means of the tensile force of the pre-pressing spring, a pressure relief channel is arranged on the piston, an air inlet hole is formed in the barrel bottom, when the pressure in the barrel exceeds the preset tension force during assembly of the pre-pressing spring, the pressure in the barrel pushes out the piston outwards along the barrel body, the pressure relief channel arranged on the piston communicates the inside and the outside of the shell for pressure relief, when the pressure drops to be smaller than the tensile force of the pre-pressing spring, the pre-pressing spring.

Description

Safety pressure relief mechanism of closed cabin of underwater detector

Technical Field

The invention relates to a mechanical pressure relief mechanism of a closed cabin, in particular to a safe pressure relief mechanism and a pressure relief method of a closed cabin of an underwater detector.

Background

The underwater detector undertakes the task of underwater signal acquisition, a signal acquisition and processing circuit is assembled in a sealed shell of the underwater detector, and the circuits are powered by batteries; when the detector works in underwater service, when a circuit system has a short circuit, a water leakage short circuit or a battery fault, the abnormal discharge and exhaust of the battery in the cabin are easily caused, the discharged gas is quickly accumulated, huge internal pressure is formed in a sealed shell, the shell is cracked by expansion, and an explosion accident can be caused in serious cases; in addition, after the production of the closed cabin of the underwater detector is finished, an air tightness test is required to be carried out, high-pressure gas with certain pressure is injected into the closed cabin, whether the cabin is leaked or not is judged, and when the pressure of the gas filled in the closed cabin exceeds the limit pressure value which can be borne by the shell if an air pressure indicator is accidentally damaged or other accidents happen in the process of injecting the pressure gas, the cabin is also burst if the cabin is not provided with an emergency pressure relief mechanism; therefore, an underwater safety pressure relief mechanism suitable for the closed cabin needs to be designed to ensure the structural safety of the cabin.

Disclosure of Invention

The invention provides a safe pressure relief mechanism and a pressure relief method for a closed cabin of an underwater detector, and solves the technical problem of how to ensure that the pressure of the closed cabin is relieved in time when the pressure in the cabin is over-pressure.

The invention solves the technical problems by the following technical scheme:

the general concept of the invention is as follows: the pressure relief barrel comprises a closed shell, a hole seat is arranged on the closed shell, a pressure relief barrel is installed on the hole seat, a barrel opening of the pressure relief barrel is arranged on the hole seat, a barrel body of the pressure relief barrel is arranged in the closed shell, a piston is arranged in the barrel opening of the pressure relief barrel, a pre-pressing spring is arranged between a barrel bottom and the piston, the purpose that the piston seals the barrel opening is achieved by means of the tensile force of the pre-pressing spring, a pressure relief channel is arranged on the piston, an air inlet hole is formed in the barrel bottom, when the pressure in a cabin exceeds the preset tension force during assembly of the pre-pressing spring, the pressure in the cabin pushes the piston outwards along the barrel body, the pressure relief channel arranged on the piston enables the interior and the exterior of the shell to be communicated for pressure relief, when the pressure is reduced to be smaller than the tensile force of the.

A safety pressure relief mechanism of a closed cabin body of an underwater detector comprises a closed cabin shell, wherein a hole seat is arranged on the closed cabin shell, a pressure relief barrel body is embedded in the hole seat, a barrel body of the pressure relief barrel body is arranged in the closed cabin shell, a barrel opening of the pressure relief barrel body is fixedly connected with the hole seat, an annular barrel cover is fixedly arranged on the barrel opening of the pressure relief barrel body, a piston body is movably arranged in a central hole of the annular barrel cover, an annular step is arranged on the outer side end of the piston body, an O-shaped sealing ring is arranged between the annular step and the annular barrel cover, a pre-tightening spring upper end connecting bolt is fixedly arranged at the center of the inner side end face of the piston body, a pre-tightening spring lower end connecting bolt is arranged at the center of the barrel bottom of the pressure relief barrel body, a pre-tightening spring is connected between the pre-tightening spring upper end connecting bolt, a horizontal air release channel is arranged, a vertical air release hole is communicated between the horizontal air release channel and the inner side end surface of the piston body, and a barrel bottom air inlet hole is formed in the barrel bottom of the pressure release barrel body.

A barrel cover sealing ring is arranged between the annular barrel cover and the convex eaves of the barrel opening of the pressure relief barrel body, and connecting bolts are arranged between the annular barrel cover, the convex eaves of the barrel opening of the pressure relief barrel body and the hole seat; the piston body is provided with a cylindrical outer side surface, and the cylindrical outer side surface is provided with a cylindrical outer side surface.

A pressure relief method of a safety pressure relief mechanism of a closed cabin of an underwater detector is characterized by comprising the following steps:

when high-pressure gas is generated in the closed cabin shell, the high-pressure gas enters the pressure release barrel body through the barrel bottom air inlet hole and generates outward thrust on the piston body, when the outward thrust is larger than the pre-tightening tension of the pre-tightening spring, the piston body is pushed up outwards, the horizontal air release channel is pushed up outwards along with the piston body and is exposed to the outer side of the annular barrel cover, and the high-pressure gas in the closed cabin shell sequentially passes through the barrel bottom air inlet hole, the vertical air release hole and the horizontal air release channel and is discharged out of the closed cabin shell to be released; when the outward thrust generated by the pressure of high-pressure gas in the chamber on the piston body is smaller than the tension of the pre-tightening spring, the piston body falls back inwards under the action of the pre-tightening spring, so that the horizontal air release channel returns back to the pressure release barrel body again, the O-shaped sealing ring arranged between the annular step and the annular barrel cover seals the central hole of the annular barrel cover again, the whole pressure release process is completed, and the safety of the closed chamber body of the underwater detector is ensured.

The invention independently completes the pressure relief, the exhaust and the return sealing, solves the potential safety hazard caused by the fact that high-pressure gas in the inner cavity of the closed cabin body cannot be released, simultaneously solves the sealing problem of the inner cavity of the closed cabin body after the internal pressure is released, and provides important guarantee for the safety of the inner cavity of the closed cabin body.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the present invention in a pressure relief configuration;

fig. 3 is a structural schematic view of the piston body 8 of the present invention.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings:

a safety pressure relief mechanism of a closed cabin body of an underwater detector comprises a closed cabin shell 1, a hole seat 2 is arranged on the closed cabin shell 1, a pressure relief barrel body 3 is embedded in the hole seat 2, a barrel body of the pressure relief barrel body 3 is arranged in the closed cabin shell 1, a barrel opening of the pressure relief barrel body 3 is fixedly connected with the hole seat 2, an annular barrel cover 4 is fixedly arranged on the barrel opening of the pressure relief barrel body 3, a piston body 8 is movably arranged in a central hole 7 of the annular barrel cover 4, an annular step 17 is arranged at the outer side end of the piston body 8, an O-shaped sealing ring 9 is arranged between the annular step 17 and the annular barrel cover 4, the piston body 8 is equivalent to a sealing plug arranged on the hole seat 2, a plug body of the sealing plug is arranged in the pressure relief barrel body 3, a connecting bolt 14 for connecting the upper end of a pre-tightening spring is fixedly arranged at the center of the inner side end surface of the piston body, a connecting bolt 16 at the lower end of a pre-tightening spring is arranged, a pre-tightening spring 15 is connected between a connecting bolt 14 at the upper end of the pre-tightening spring and the connecting bolt 16 at the lower end of the pre-tightening spring, the barrel opening of the piston body 8 is sealed by means of pre-tightening tension of the pre-tightening spring 15, so that the whole closed cabin shell 1 is in a closed state, a gap between the piston body 8 and the annular barrel cover 4 is sealed by an O-shaped sealing ring 9, and when the closed cabin shell 1 is underwater, water pressure is also beneficial to the compression and sealing of the barrel opening; a horizontal air release channel 10 is arranged on the plug body of the piston body 8, a vertical air release hole 11 is communicated between the horizontal air release channel 10 and the inner side end surface of the piston body 8, and a barrel bottom air inlet 18 is arranged on the barrel bottom of the pressure release barrel body 3.

A barrel cover sealing ring 5 is arranged between the annular barrel cover 4 and the convex brim of the barrel opening of the pressure relief barrel body 3, a connecting bolt 6 is arranged between the annular barrel cover 4 and the convex brim of the barrel opening of the pressure relief barrel body 3 and the hole seat 2, and the barrel opening and the barrel cover can be fixed together with the hole seat 2 through the connecting bolt 6 during assembly; a limiting plate 12 is connected to the inner side end surface of the piston body 8, and an annular limiting step 13 is arranged between the limiting plate 12 and the cylindrical outer side surface of the piston body 8, wherein the annular limiting step 13 is used for preventing the piston body 8 from being separated from the decompression barrel body 3.

A pressure relief method of a safety pressure relief mechanism of a closed cabin of an underwater detector is characterized by comprising the following steps:

when high-pressure gas is generated in the closed cabin shell 1, the high-pressure gas enters the pressure relief barrel body 3 through the barrel bottom air inlet hole 18 to generate outward thrust on the piston body 8, when the outward thrust is greater than the pre-tightening tension of the pre-tightening spring 15, the piston body 8 is pushed up outwards, the horizontal air release channel 10 is pushed up outwards along with the piston body 8 and is exposed to the outer side of the annular barrel cover 4, the high-pressure gas in the closed cabin shell 1 sequentially passes through the barrel bottom air inlet hole 18, the vertical air release hole 11 and the horizontal air release channel 10 and is discharged out of the closed cabin shell 1 to be relieved, when the piston body 8 is lifted outwards, a gap is also generated between the cylindrical vertical surface of the piston body 8 and the central hole of the annular barrel cover 4, the high-pressure gas can also be discharged from the gap, and the pressure relief is finished in an underwater bubble blowing mode due to the high pressure of the gas in the cabin; when the outward thrust generated by the pressure of the high-pressure gas in the chamber on the piston body 8 is smaller than the tension of the pre-tightening spring 15, the piston body 8 falls back inwards under the action of the pre-tightening spring 15, so that the horizontal air release channel 10 returns to the pressure release barrel body 3 again, the O-shaped sealing ring 9 arranged between the annular step 17 and the annular barrel cover 4 seals the central hole 7 of the annular barrel cover 4 again, the whole pressure release process is completed, the safety of the closed chamber body of the underwater detector is ensured, and no water enters the chamber in the pressure release process.

Claims (2)

1. A safe pressure relief mechanism of a closed cabin body of an underwater detector comprises a closed cabin shell (1), wherein a hole seat (2) is arranged on the closed cabin shell (1), a pressure relief barrel body (3) is embedded in the hole seat (2), a barrel body of the pressure relief barrel body (3) is arranged in the closed cabin shell (1), a barrel opening of the pressure relief barrel body (3) is fixedly connected with the hole seat (2), the safe pressure relief mechanism is characterized in that an annular barrel cover (4) is fixedly arranged on the barrel opening of the pressure relief barrel body (3), a piston body (8) is movably arranged in a central hole (7) of the annular barrel cover (4), an annular step (17) is arranged at the outer side end of the piston body (8), an O-shaped sealing ring (9) is arranged between the annular step (17) and the annular barrel cover (4), a connecting bolt (14) at the upper end of a pre-tightening spring is fixedly arranged at the center of the inner side end face of, a lower end connecting bolt (16) of a pre-tightening spring is arranged at the center of the barrel bottom of the pressure relief barrel body (3), a pre-tightening spring (15) is connected between an upper end connecting bolt (14) of the pre-tightening spring and the lower end connecting bolt (16) of the pre-tightening spring, a horizontal air release channel (10) is arranged on the plug body of the piston body (8), a vertical air release hole (11) is communicated between the horizontal air release channel (10) and the inner side end face of the piston body (8), and a barrel bottom air inlet hole (18) is arranged at the barrel bottom of the pressure relief barrel body (3).

2. The safety pressure relief mechanism of the closed cabin of the underwater detector as claimed in claim 1, wherein a barrel cover sealing ring (5) is arranged between the annular barrel cover (4) and the outer convex brim of the barrel opening of the pressure relief barrel body (3), and a connecting bolt (6) is arranged between the annular barrel cover (4) and the outer convex brim of the barrel opening of the pressure relief barrel body (3) and the hole seat (2); a limiting plate (12) is connected to the inner side end face of the piston body (8), and an annular limiting step (13) is arranged between the limiting plate (12) and the cylindrical outer side face of the piston body (8).

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