Marine air pressure reducing valve with airtight detection function

Abstract

The marine air pressure reducing valve with the airtight detection function comprises a valve body assembly, a valve deck, a valve element mechanism, an adjusting mechanism and an airflow sensor, the valve body assembly is fixedly connected with the valve deck and the valve element mechanism, the valve element mechanism is fixedly connected with the adjusting mechanism, the valve deck is fixedly connected with the adjusting mechanism, and the airflow sensor is fixedly connected with the valve deck. The valve body assembly comprises an air inlet pipe and an air outlet pipe, the number of the airflow sensors is two, each airflow sensor comprises an outer cylinder and a Hall sensor, one outer cylinder is fixedly connected with the air inlet pipe, the other outer cylinder is fixedly connected with the air outlet pipe, and the Hall sensors are connected with the valve element mechanism and the adjusting mechanism through electric signals; the invention relates to the technical field of air pressure reducing valves, and discloses an air pressure reducing valve which adjusts adaptive spring force according to gas types, so that air pressure at an outlet is balanced with the spring force, downstream equipment can be emergently locked and protected, and whether the sealing performance of the pressure reducing valve is qualified or not is judged by comparing the gas flow at an inlet and the gas flow at the outlet.

Description

Technical Field

[0001] The invention relates to the technical field of air pressure reducing valves, in particular to a marine air pressure reducing valve with a sealing detection function. Background Art

[0002] As a key part of the ship's pneumatic system, the marine air pressure reducing valve plays a vital role in ensuring the stable operation of gas-using equipment. It accurately controls the compressed air pressure, and for the diversified gas needs of ship precision instruments, automation equipment, etc., it uses high-precision pressure conversion capabilities to accurately adjust the inlet pressure to an adaptive stable outlet pressure, with the error controlled within a very small range, effectively ensuring the stable output of equipment performance. For example, the ship radar system, which has extremely high requirements for air supply stability, its stable operation is highly dependent on the precise regulation of the pressure reducing valve.

[0003] Current pressure reducing valves are generally equipped with overpressure protection mechanisms. Given the complex operating conditions of ships, once the outlet pressure soars out of control, the pressure reducing valve can quickly and automatically cut off the airflow to prevent damage to downstream equipment due to overpressure and maintain system safety. Furthermore, ship operations involve a variety of airflows, and different airflows have different physical properties and compression characteristics, which requires frequent adjustment of the internal spring force of the pressure reducing valve to dynamically adapt it to different airflows to ensure stable air supply. Summary of the invention

[0004] The object of the present invention is to provide a marine air pressure reducing valve with a sealing detection function to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A marine air pressure reducing valve with a sealing detection function comprises a valve body assembly, a valve cover, a valve core mechanism, an adjusting mechanism and an airflow sensor, the valve body assembly is fixedly connected to the valve cover and the valve core mechanism, the valve core mechanism is fixedly connected to the adjusting mechanism, the valve cover is fixedly connected to the adjusting mechanism, the valve body assembly comprises an air inlet pipe and an air outlet pipe, two groups of airflow sensors are provided, the airflow sensors comprise an outer tube and a Hall sensor, one group of outer tubes is fixedly connected to the air inlet pipe, and the other group of outer tubes is fixedly connected to the air outlet pipe, and the Hall sensor is connected to the valve core mechanism and the adjusting mechanism through electrical signals.

[0006] The present invention is a device for reducing pressure for various fluid systems of ships. High-pressure gas enters the valve body assembly from an air intake pipe, and the flow rate of the gas is identified by an air flow sensor located in the air intake pipe. In the initial state, according to the type of the passing air flow, the regulating mechanism adjusts the initial position of the valve core mechanism according to the spring force of the adapted air flow. If the air pressure of the high-pressure air flow acting on the bottom of the valve core mechanism is greater than the spring force, the valve core mechanism will move downward to increase the valve opening, so that the air flow can pass through and flow to the outlet. As the air continues to flow out, the outlet pressure gradually rises until the air pressure at the outlet reaches a balance with the spring force, the valve core mechanism stops moving and stabilizes at a specific opening, and the outlet pressure is maintained at a corresponding value. If the inlet pressure decreases and the outlet pressure is less than the spring force, the valve core mechanism moves upward, the opening is reduced, and the air outflow is restricted. The outlet pressure will rise again and always approach the pressure value preset by the spring. The regulating mechanism actively closes the pressure reducing valve, and by comparing the air flow sensors at the air intake pipe and the air outlet pipe, it is judged whether the sealing of the pressure reducing valve is qualified.

[0007] Furthermore, the valve body assembly also includes an annular slope, an annular chamber, a bottom hole seat and a valve body part. The air inlet pipe, the air outlet pipe, the annular slope, the annular chamber and the bottom hole seat are all fixedly connected to the valve body part. The valve core mechanism includes a sealing mechanism, a sealing member and a butterfly wing plate. The sealing mechanism includes a middle plate and a bottom plate. The sealing member is fixedly connected to the annular chamber and the butterfly wing plate. The butterfly wing plate is fixedly connected to the valve body part. The middle plate is slidably connected to the sealing member. A main hole is provided on the annular slope, and the bottom plate is in contact with the main hole.

[0008] High-pressure gas enters the valve body from the intake pipe. If the air pressure of the high-pressure airflow acting on the chassis is greater than the spring force, the middle plate slides downward in the seal, and the distance between the chassis and the main hole increases, so that the valve opening increases, and the air flow can pass to the outlet. As the air continues to flow out, the outlet pressure gradually rises until the air pressure at the outlet reaches a balance with the spring force, and the middle plate stops moving; the inlet pressure decreases, and the outlet pressure is less than the spring force, the middle plate moves up in the seal, the opening decreases, and the air outflow is restricted, and the outlet pressure will rise again.

[0009] Furthermore, the sealing mechanism also includes a top plate and a main shaft, the main shaft is fixedly connected to the top plate, the middle plate and the bottom plate, the main shaft is slidably connected to the bottom hole seat, and the adjustment mechanism includes a compression spring, and the top plate is fixedly connected to the compression spring.

[0010] If the air pressure of the high-pressure airflow acting on the bottom plate is greater than the spring force, the compression spring is pulled through the top plate, and the middle plate slides downward in the seal. The distance between the bottom plate and the main hole increases, so that the valve opening increases and the airflow can pass through to the outlet.

[0011] Furthermore, the valve core mechanism also includes an overpressure mechanism, the annular slope and the annular chamber, the valve body, the seal, the overpressure mechanism, the middle plate, and the bottom plate constitute an air intake chamber, the butterfly wing plate and the annular chamber, the valve body, the seal, and the bottom plate constitute an exhaust chamber, and the top plate and the annular chamber, the valve body, the seal, the middle plate, and the valve cover constitute a pressure chamber.

[0012] High-pressure gas enters the valve body from the intake pipe. If the air pressure of the high-pressure airflow in the intake chamber acting on the chassis is greater than the spring force, the valve opening increases, and the airflow is able to pass through and flow to the outlet. As the air continues to flow out, the outlet pressure in the exhaust chamber gradually rises. The exhaust chamber is connected to the pressure chamber through the butterfly plate, and the air pressure acts on the top plate until the air pressure at the outlet is balanced with the spring force, and the middle plate stops moving; the inlet pressure decreases, and the outlet pressure is less than the spring force, the middle plate moves up in the seal, the opening decreases, and the air outflow is restricted, and the outlet pressure will rise again.

[0013] Furthermore, the overpressure mechanism includes a first motor, a first gear and a semi-annular table, a first side hole and a semi-annular groove are provided on the annular chamber, the first motor is fixedly connected to the annular chamber, the output end of the first motor is rotatably connected to the first side hole, the output end of the first motor is fixedly connected to the first gear, an internal tooth groove is provided on the semi-annular table, the first gear is meshed with the tooth surface of the internal tooth groove, the semi-annular table is slidably connected to the semi-annular groove, the semi-annular table is in contact with the intake pipe, and the first motor is connected to the Hall sensor through electrical signals.

[0014] When the upstream pressure suddenly surges and the pressure reducing valve fails to adjust, the airflow sensor detects that the flow rate is out of range, and the first motor outputs a fixed-axis torque to the first gear, which engages with the inner tooth surface of the semi-annular table through the first gear. The semi-annular table slides downward along the semi-annular groove to contact and block the intake pipe, thereby urgently locking the pressure reducing valve to ensure that downstream equipment will not be damaged due to overpressure.

[0015] Furthermore, the regulating mechanism also includes a second motor, a worm, a cylinder and a liquid control mechanism. The second motor is fixedly connected to the valve cover, the output end of the second motor is fixedly connected to the worm, the valve cover is provided with a slide rail, the cylinder is provided with a threaded hole, a first bottom hole and a slide groove, the worm is connected to the threaded hole by a thread, the slide groove is slidably connected to the slide rail, the liquid control mechanism includes a bottom chamber and a third motor, the bottom chamber is fixedly connected to the first bottom hole, the cylinder is fixedly connected to the compression spring, the cylinder and the bottom chamber form an upper oil chamber, the second motor and the third motor are connected to the Hall sensor through electrical signals, and the top plate, the valve cover and the cylinder form a lower oil chamber.

[0016] Before the pressure reducing valve is ventilated, the valve core mechanism needs to be moved to a specified position, and the second motor outputs a fixed-axis torque to the worm. Through the threaded connection between the worm and the threaded hole, the cylinder slides and moves along the slide rail, and the top plate is pushed by the cylinder and the compression spring assembly to move the valve core mechanism to a specified position. If the air pressure of the high-pressure airflow in the intake chamber acting on the chassis is greater than the spring force, the pressure of the high-pressure airflow is greater than the elastic force of the compression spring and the force of the hydraulic oil moving in the upper oil chamber and the lower oil chamber.

[0017] Furthermore, the liquid control mechanism also includes an inner cover and an outer cover, the third motor is fixedly connected to the bottom chamber, the output end of the third motor is fixedly connected to the inner cover, the outer cover is fixedly connected to the cylinder, the inner cover is provided with a second side hole, the outer cover is provided with a third side hole, the second side holes and the third side holes are provided with several groups, several groups of second side holes are evenly distributed along the circumference of the inner cover, several groups of third side holes are evenly distributed along the circumference of the outer cover, and the second side holes are in contact with the third side holes.

[0018] In the initial state, the spring force that adapts to the airflow is adjusted according to the type of airflow passing through, and the third motor outputs a fixed-axis torque to the inner cover. The inner cover rotates, so that the overlapping area of ​​several groups of second side holes and third side holes evenly distributed along the circumference of the inner cover is reduced, thereby reducing the gas flow through the outer cover and the inner cover, and changing the force of the hydraulic oil moving in the upper oil chamber and the lower oil chamber.

[0019] Furthermore, the airflow sensor also includes an impeller, a magnetic wheel and a side frame. The impeller is rotatably connected to the outer cylinder, the impeller is fixedly connected to the magnetic wheel, the side frame is fixedly connected to the outer cylinder and the Hall sensor, and the magnetic wheel is connected to the Hall sensor through a magnetic field.

[0020] The high-pressure gas drives the impeller to rotate. The impeller is fixed with a magnetic wheel. The high-pressure gas passes through the outer cylinder and the Hall sensor identifies the changes in the magnetic field caused by the rotation of the magnetic wheel. The Hall sensor converts the magnetic field rotation speed into an electrical signal.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention designs an overpressure mechanism. When the upstream pressure suddenly surges and the pressure reducing valve fails to adjust, and the airflow sensor detects that the flow rate exceeds the range, the first motor outputs a fixed-axis torque to the first gear, and the first gear engages with the inner tooth groove surface on the semi-annular platform. The semi-annular platform slides downward along the semi-annular groove to contact and block the intake pipe, and the pressure reducing valve is urgently locked to ensure that the downstream equipment will not be damaged due to overpressure; the present invention designs an adjustment mechanism. In the initial state, the spring force adapted to the airflow is adjusted according to the type of airflow passing through. The third motor outputs a fixed-axis torque to the inner cover. The inner cover rotates to reduce the overlapping area of ​​the second side holes and the third side holes evenly distributed along the circumference of the inner cover, thereby reducing the gas flow through the outer cover and the inner cover, and changing the hydraulic The force of the oil moving in the upper oil chamber and the lower oil chamber requires the valve core mechanism to be moved to a specified position before the pressure reducing valve is ventilated. The second motor outputs a fixed-axis torque to the worm. Through the threaded connection between the worm and the threaded hole, the cylinder slides and moves along the slide rail. The cylinder and the compression spring are assembled to push the top plate to move the valve core mechanism to a specified position. If the air pressure of the high-pressure airflow in the air intake chamber acting on the chassis is greater than the spring force, the pressure of the high-pressure airflow is greater than the elastic force of the compression spring and the force of the hydraulic oil moving in the upper oil chamber and the lower oil chamber. The present invention adjusts the adaptive spring force according to the type of gas to balance the air pressure at the outlet with the spring force, and can perform emergency locking to protect downstream equipment. By comparing the gas flow at the inlet and outlet, it is possible to determine whether the sealing of the pressure reducing valve is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a partial cross-sectional view of the present invention;

[0024] Figure 3 It is a schematic diagram of the valve body assembly structure of the present invention;

[0025] Figure 4 for Figure 3 A schematic diagram of a local A enlargement;

[0026] Figure 5 It is a schematic diagram of the structure of the regulating mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the liquid control mechanism of the present invention;

[0028] Figure 7 for Figure 6 A partial enlarged schematic diagram of B;

[0029] Figure 8 It is a schematic diagram of the structure of the airflow sensor of the present invention.

[0030] In the figure: 1, valve body assembly; 11, air inlet pipe; 12, air outlet pipe; 13, ring slope; 131, main hole; 14, ring chamber; 141, first side hole; 142, semi-ring groove; 15, bottom hole seat; 16, valve body; 2, valve cover; 21, slide rail; 3, valve core mechanism; 31, sealing mechanism; 311, top plate; 312, main shaft; 313, middle plate; 314, bottom plate; 32, sealing member; 33, butterfly plate; 34, overpressure mechanism; 341, first motor; 342, first gear; 343, semi-ring platform; 3431, inner tooth groove; 35, air inlet Air chamber; 36, exhaust chamber; 37, pressure chamber; 4, adjustment mechanism; 41, second motor; 42, worm; 43, cylinder; 431, threaded hole; 432, first bottom hole; 433, slide groove; 434, upper oil chamber; 44, liquid control mechanism; 441, bottom chamber; 442, third motor; 443, inner cover; 4431, second side hole; 444, outer cover; 4441, third side hole; 45, compression spring; 46, lower oil chamber; 5, air flow sensor; 51, outer cylinder; 52, impeller; 53, magnetic wheel; 54, side frame; 55, Hall sensor. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1 , Figure 2 , Figure 8 As shown, the present invention provides a technical solution of a marine air pressure reducing valve with a sealing detection function, including a valve body assembly 1, a valve cover 2, a valve core mechanism 3, an adjusting mechanism 4 and an airflow sensor 5. The valve body assembly 1 is fixedly connected to the valve cover 2 and the valve core mechanism 3, the valve core mechanism 3 is fixedly connected to the adjusting mechanism 4, the valve cover 2 is fixedly connected to the adjusting mechanism 4, the valve body assembly 1 includes an air inlet pipe 11 and an air outlet pipe 12, and the airflow sensor 5 is provided with two groups, the airflow sensor 5 includes an outer tube 51 and a Hall sensor 55, one group of outer tubes 51 is fixedly connected to the air inlet pipe 11, and the other group of outer tubes 51 is fixedly connected to the air outlet pipe 12, and the Hall sensor 55 is connected to the valve core mechanism 3 and the adjusting mechanism 4 through electrical signals.

[0033] The present invention is a device for reducing pressure for various fluid systems of ships. High-pressure gas enters the valve body assembly 1 from the air inlet pipe 11. The flow rate of the gas is identified by the air flow sensor 5 located in the air inlet pipe 11. In the initial state, according to the type of air flow, the regulating mechanism 4 adjusts the initial position of the valve core mechanism 3 according to the spring force of the adapted air flow. If the air pressure of the high-pressure air flow acting on the bottom of the valve core mechanism 3 is greater than the spring force, the valve core mechanism 3 will move downward to increase the valve opening, so that the air flow can pass through and flow to the outlet. As the air continues to flow out, the outlet pressure gradually rises until the air pressure at the outlet reaches a balance with the spring force, the valve core mechanism 3 stops moving and stabilizes at a specific opening, and the outlet pressure is maintained at the corresponding value. If the inlet pressure decreases and the outlet pressure is less than the spring force, the valve core mechanism 3 moves upward, the opening is reduced, and the air outflow is restricted. The outlet pressure will rise again and always approach the pressure value preset by the spring. The regulating mechanism 4 actively closes the pressure reducing valve. By comparing the air flow sensors 5 at the air inlet pipe 11 and the air outlet pipe 12, it is judged whether the sealing of the pressure reducing valve is qualified.

[0034] like Figure 1 , Figure 2 , Figure 3As shown, the valve body assembly 1 also includes an annular slope 13, an annular chamber 14, a bottom hole seat 15 and a valve body part 16. The air inlet pipe 11, the air outlet pipe 12, the annular slope 13, the annular chamber 14, and the bottom hole seat 15 are all fixedly connected to the valve body part 16. The valve core mechanism 3 includes a sealing mechanism 31, a sealing member 32 and a butterfly plate 33. The sealing mechanism 31 includes a middle plate 313 and a bottom plate 314. The sealing member 32 is fixedly connected to the annular chamber 14 and the butterfly plate 33. The butterfly plate 33 is fixedly connected to the valve body part 16. The middle plate 313 is slidably connected to the sealing member 32. A main hole 131 is provided on the annular slope 13, and the bottom plate 314 is in contact with the main hole 131.

[0035] High-pressure gas enters the valve body 16 from the intake pipe 11. If the air pressure of the high-pressure airflow acting on the bottom plate 314 is greater than the spring force, the middle plate 313 slides downward in the seal 32, and the distance between the bottom plate 314 and the main hole 131 increases, so that the valve opening increases, and the air flow can pass to the outlet. As the air continues to flow out, the outlet pressure gradually rises until the air pressure at the outlet reaches a balance with the spring force, and the middle plate 313 stops moving; the inlet pressure decreases, and the outlet pressure is less than the spring force, the middle plate 313 moves up in the seal 32, the opening decreases, and the air outflow is restricted, and the outlet pressure will rise again.

[0036] like Figure 3 , Figure 4 As shown, the sealing mechanism 31 also includes a top plate 311 and a main shaft 312. The main shaft 312 is fixedly connected to the top plate 311, the middle plate 313, and the bottom plate 314. The main shaft 312 is slidably connected to the bottom hole seat 15. The adjustment mechanism 4 includes a compression spring 45. The top plate 311 is fixedly connected to the compression spring 45.

[0037] If the air pressure of the high-pressure airflow acting on the bottom plate 314 is greater than the spring force, the compression spring 45 is pulled through the top plate 311, and the middle plate 313 slides downward in the seal 32, and the distance between the bottom plate 314 and the main hole 131 increases, so that the valve opening increases, and the airflow can pass to the outlet.

[0038] like Figure 3 , Figure 4 As shown, the valve core mechanism 3 also includes an overpressure mechanism 34, the annular slope 13 and the annular chamber 14, the valve body 16, the seal 32, the overpressure mechanism 34, the middle plate 313, and the bottom plate 314 form an intake chamber 35, the butterfly plate 33 and the annular chamber 14, the valve body 16, the seal 32, and the bottom plate 314 form an exhaust chamber 36, and the top plate 311 and the annular chamber 14, the valve body 16, the seal 32, the middle plate 313, and the valve cover 2 form a pressure chamber 37.

[0039] High-pressure gas enters the valve body 16 from the intake pipe 11. If the air pressure of the high-pressure airflow in the intake chamber 35 acting on the bottom plate 314 is greater than the spring force, the valve opening increases, and the airflow is able to pass through and flow to the outlet. As the air continues to flow out, the outlet pressure in the exhaust chamber 36 gradually rises. The exhaust chamber 36 is connected to the pressure chamber 37 through the butterfly plate 33, and the air pressure acts on the top plate 311 until the air pressure at the outlet reaches a balance with the spring force, and the middle plate 313 stops moving; the inlet pressure decreases, and the outlet pressure is less than the spring force, the middle plate 313 moves up in the sealing member 32, and the opening decreases, restricting the outflow of air, and the outlet pressure will rise again.

[0040] like Figure 3 , Figure 4 As shown, the overpressure mechanism 34 includes a first motor 341, a first gear 342 and a semi-annular platform 343. The annular chamber 14 is provided with a first side hole 141 and a semi-annular groove 142. The first motor 341 is fixedly connected to the annular chamber 14. The output end of the first motor 341 is rotatably connected to the first side hole 141. The output end of the first motor 341 is fixedly connected to the first gear 342. An inner tooth groove 3431 is provided on the semi-annular platform 343. The first gear 342 meshes with the tooth surface of the inner tooth groove 3431. The semi-annular platform 343 is slidably connected to the semi-annular groove 142. The semi-annular platform 343 contacts the intake pipe 11. The first motor 341 is connected to the Hall sensor 55 through an electrical signal.

[0041] When the upstream pressure suddenly surges and the pressure reducing valve fails to adjust, the airflow sensor 5 detects that the flow rate is out of range, and the first motor 341 outputs a fixed-axis torque to the first gear 342. The first gear 342 engages with the tooth surface of the inner tooth groove 3431 on the semi-annular platform 343, and the semi-annular platform 343 slides downward along the semi-annular groove 142 to contact and block the intake pipe 11, thereby urgently locking the pressure reducing valve to ensure that downstream equipment will not be damaged due to overpressure.

[0042] like Figure 5 , Figure 6 , Figure 7 As shown, the regulating mechanism 4 also includes a second motor 41, a worm 42, a cylinder 43 and a liquid control mechanism 44. The second motor 41 is fixedly connected to the valve cover 2, and the output end of the second motor 41 is fixedly connected to the worm 42. The valve cover 2 is provided with a slide rail 21, and the cylinder 43 is provided with a threaded hole 431, a first bottom hole 432 and a slide groove 433. The worm 42 is connected to the threaded hole 431 by threads, and the slide groove 433 is slidably connected to the slide rail 21. The liquid control mechanism 44 includes a bottom chamber 441 and a third motor 442. The bottom chamber 441 is fixedly connected to the first bottom hole 432, the cylinder 43 is fixedly connected to the compression spring 45, and the cylinder 43 and the bottom chamber 441 form an upper oil chamber 434. The second motor 41 and the third motor 442 are connected to the Hall sensor 55 through electrical signals, and the top plate 311, the valve cover 2 and the cylinder 43 form a lower oil chamber 46.

[0043] Before the pressure reducing valve is ventilated, the valve core mechanism 3 needs to be moved to a specified position, and the second motor 41 outputs a fixed-axis torque to the worm 42. Through the threaded connection between the worm 42 and the threaded hole 431, the cylinder 43 slides along the slide rail 21, and the top plate 311 is pushed by the assembly of the cylinder 43 and the compression spring 45 to move the valve core mechanism 3 to a specified position. If the air pressure of the high-pressure airflow in the air intake chamber 35 acting on the bottom plate 314 is greater than the spring force, the pressure of the high-pressure airflow is greater than the elastic force of the compression spring 45 and the force of the hydraulic oil moving in the upper oil chamber 434 and the lower oil chamber 46.

[0044] like Figure 7 As shown, the liquid control mechanism 44 also includes an inner cover 443 and an outer cover 444, the third motor 442 is fixedly connected to the bottom chamber 441, the output end of the third motor 442 is fixedly connected to the inner cover 443, the outer cover 444 is fixedly connected to the cylinder 43, the inner cover 443 is provided with a second side hole 4431, the outer cover 444 is provided with a third side hole 4441, the second side holes 4431 and the third side holes 4441 are both provided with a plurality of groups, the plurality of groups of second side holes 4431 are evenly distributed along the circumference of the inner cover 443, the plurality of groups of third side holes 4441 are evenly distributed along the circumference of the outer cover 444, and the second side holes 4431 are in contact with the third side holes 4441.

[0045] In the initial state, the spring force that adapts to the airflow is adjusted according to the type of airflow passing through, and the third motor 442 outputs a fixed-axis torque to the inner cover 443. The inner cover 443 rotates to reduce the overlapping area between several groups of second side holes 4431 and third side holes 4441 evenly distributed along the circumference of the inner cover 443, thereby reducing the gas flow through the outer cover 444 and the inner cover 443 and changing the force of the hydraulic oil moving in the upper oil chamber 434 and the lower oil chamber 46.

[0046] like Figure 8 As shown, the airflow sensor 5 also includes an impeller 52, a magnetic wheel 53 and a side frame 54. The impeller 52 is rotatably connected to the outer cylinder 51, the impeller 52 is fixedly connected to the magnetic wheel 53, the side frame 54 is fixedly connected to the outer cylinder 51 and the Hall sensor 55, and the magnetic wheel 53 is connected to the Hall sensor 55 through a magnetic field.

[0047] The high-pressure gas drives the impeller 52 to rotate. The impeller 52 is fixed with a magnetic wheel 53. The high-pressure gas passes through the outer cylinder 51 and identifies the magnetic field changes caused by the rotation of the magnetic wheel 53 through the Hall sensor 55. The Hall sensor 55 converts the magnetic field rotation speed into an electrical signal.

[0048] Working principle of the present invention: The present invention is a device for reducing pressure for various fluid systems of ships. High-pressure gas enters the valve body assembly 1 from the air intake pipe 11, and the flow rate of the gas is identified by the air flow sensor 5 located in the air intake pipe 11. In the initial state, the spring force adapted to the air flow is adjusted according to the type of the air flow passing through. The third motor 442 outputs a fixed-axis torque to the inner cover 443, and the inner cover 443 rotates to reduce the overlapping area of ​​the plurality of groups of second side holes 4431 and the third side holes 4441 uniformly distributed along the circumference of the inner cover 443, thereby reducing the gas flow through the outer cover 444 and the inner cover 443, changing the force of the hydraulic oil moving in the upper oil chamber 434 and the lower oil chamber 46, and adjusting the initial position of the valve core mechanism 3. High-pressure gas enters the valve body 16 from the air intake pipe 11. If the air pressure of the high-pressure air flow in the air intake chamber 35 acting on the chassis 314 is greater than the spring force, the valve opening increases, and the air flow is able to pass through and flow to the outlet. As the air continues to flow out, the outlet pressure in the exhaust chamber 36 gradually increases. Gradually rise, the exhaust chamber 36 is connected to the pressure chamber 37 through the butterfly plate 33, and the air pressure acts on the top plate 311 until the air pressure at the outlet is balanced with the spring force, and the middle plate 313 stops moving; the inlet pressure decreases, the outlet pressure is less than the spring force, the middle plate 313 moves up in the seal 32, the opening is reduced, and the air outflow is restricted. The outlet pressure will rise again, and it will always approach the pressure value preset by the spring. The regulating mechanism 4 actively closes the pressure reducing valve, and judges whether the sealing of the pressure reducing valve is qualified by comparing the air flow sensor 5 at the air inlet pipe 11 and the air outlet pipe 12. When the upstream pressure suddenly surges and the pressure reducing valve fails to adjust, the air flow sensor 5 detects that the flow rate exceeds the range, and the first motor 341 outputs a fixed shaft torque to the first gear 342, and the first gear 342 is meshed with the tooth surface of the inner tooth groove 3431 on the semi-annular platform 343, and the semi-annular platform 343 slides downward along the semi-annular groove 142 to contact and block the air inlet pipe 11, and the pressure reducing valve is urgently locked to ensure that the downstream equipment will not be damaged due to overpressure.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A marine air pressure reducing valve with a sealing detection function, characterized in that: The pressure reducing valve comprises a valve body assembly (1), a valve cover (2), a valve core mechanism (3), an adjusting mechanism (4) and an air flow sensor (5); the valve body assembly (1) is fixedly connected to the valve cover (2) and the valve core mechanism (3); the valve core mechanism (3) is fixedly connected to the adjusting mechanism (4); the valve cover (2) is fixedly connected to the adjusting mechanism (4); the valve body assembly (1) comprises an air inlet pipe (11) and an air outlet pipe (12); two groups of air flow sensors (5) are provided; the air flow sensors (5) comprise an outer tube (51) and a Hall sensor (55); one group of the outer tubes (51) is fixedly connected to the air inlet pipe (11); the other group of the outer tubes (51) is fixedly connected to the air outlet pipe (12); the Hall sensor (55) is connected to the valve core mechanism (3) and the adjusting mechanism (4) via electrical signals.

2. The marine air pressure reducing valve with airtightness detection function according to claim 1, characterized in that: The valve body assembly (1) further comprises an annular slope (13), an annular chamber (14), a bottom hole seat (15) and a valve body member (16); the air inlet pipe (11), the air outlet pipe (12), the annular slope (13), the annular chamber (14) and the bottom hole seat (15) are all fixedly connected to the valve body member (16); the valve core mechanism (3) comprises a sealing mechanism (31), a sealing member (32) and a butterfly plate (33); the sealing mechanism (31) comprises a middle plate (313) and a bottom plate (314); the sealing member (32) is fixedly connected to the annular chamber (14) and the butterfly plate (33); the butterfly plate (33) is fixedly connected to the valve body member (16); the middle plate (313) is slidably connected to the sealing member (32); a main hole (131) is provided on the annular slope (13); and the bottom plate (314) is in contact with the main hole (131).

3. The marine air pressure reducing valve with airtightness detection function according to claim 2, characterized in that: The sealing mechanism (31) further comprises a top plate (311) and a main shaft (312); the main shaft (312) is fixedly connected to the top plate (311), the middle plate (313), and the bottom plate (314); the main shaft (312) is slidably connected to the bottom hole seat (15); the adjustment mechanism (4) comprises a compression spring (45); and the top plate (311) is fixedly connected to the compression spring (45).

4. The marine air pressure reducing valve with airtightness detection function according to claim 3, characterized in that: The valve core mechanism (3) further comprises an overpressure mechanism (34); the annular slope (13) and the annular chamber (14), the valve body (16), the sealing member (32), the overpressure mechanism (34), the middle plate (313) and the bottom plate (314) form an air intake chamber (35); the butterfly plate (33) and the annular chamber (14), the valve body (16), the sealing member (32) and the bottom plate (314) form an air exhaust chamber (36); and the top plate (311) and the annular chamber (14), the valve body (16), the sealing member (32), the middle plate (313) and the valve cover (2) form a pressure chamber (37).

5. The marine air pressure reducing valve with airtightness detection function according to claim 4, characterized in that: The overpressure mechanism (34) comprises a first motor (341), a first gear (342) and a semi-annular platform (343); the annular chamber (14) is provided with a first side hole (141) and a semi-annular groove (142); the first motor (341) is fixedly connected to the annular chamber (14); the output end of the first motor (341) is rotatably connected to the first side hole (141); the output end of the first motor (341) is fixedly connected to the first gear (342); an inner tooth groove (3431) is provided on the semi-annular platform (343); the first gear (342) and the inner tooth groove (3431) are meshed with each other; the semi-annular platform (343) is slidably connected to the semi-annular groove (142); the semi-annular platform (343) is in contact with the intake pipe (11); and the first motor (341) is connected to the Hall sensor (55) via an electrical signal.

6. The marine air pressure reducing valve with airtightness detection function according to claim 3, characterized in that: The regulating mechanism (4) further comprises a second motor (41), a worm (42), a cylinder (43) and a liquid control mechanism (44); the second motor (41) is fixedly connected to the valve cover (2); the output end of the second motor (41) is fixedly connected to the worm (42); a slide rail (21) is provided on the valve cover (2); a threaded hole (431), a first bottom hole (432) and a slide groove (433) are provided on the cylinder (43); the worm (42) is connected to the threaded hole (431) by threads; the slide groove (433) is connected to the slide rail (21) is slidably connected, the liquid control mechanism (44) comprises a bottom chamber (441) and a third motor (442), the bottom chamber (441) is fixedly connected to the first bottom hole (432), the cylinder (43) is fixedly connected to the compression spring (45), the cylinder (43) and the bottom chamber (441) form an upper oil chamber (434), the second motor (41) and the third motor (442) are connected to the Hall sensor (55) through electrical signals, and the top plate (311) and the valve cover (2) and the cylinder (43) form a lower oil chamber (46).

7. The marine air pressure reducing valve with airtightness detection function according to claim 6, characterized in that: The liquid control mechanism (44) further comprises an inner cover (443) and an outer cover (444); the third motor (442) is fixedly connected to the bottom chamber (441); the output end of the third motor (442) is fixedly connected to the inner cover (443); the outer cover (444) is fixedly connected to the cylinder (43); a second side hole (4431) is provided on the inner cover (443); a third side hole (4441) is provided on the outer cover (444); the second side hole (4431) and the third side hole (4441) are both provided in a plurality of groups; the plurality of groups of the second side holes (4431) are evenly distributed along the circumference of the inner cover (443); the plurality of groups of the third side holes (4441) are evenly distributed along the circumference of the outer cover (444); and the second side holes (4431) are in contact with the third side holes (4441).

8. The marine air pressure reducing valve with airtightness detection function according to claim 1, characterized in that: The airflow sensor (5) further comprises an impeller (52), a magnetic wheel (53) and a side frame (54); the impeller (52) is rotationally connected to the outer cylinder (51); the impeller (52) is fixedly connected to the magnetic wheel (53); the side frame (54) is fixedly connected to the outer cylinder (51) and the Hall sensor (55); and the magnetic wheel (53) is connected to the Hall sensor (55) via a magnetic field.

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