Magnetic type hydrostatic pressure release device

Abstract

The invention discloses a magnetic type hydrostatic pressure release device, which comprises a base, a bandage, a locking seat, a cover plate, a magnet, a water inlet switch, a valve, a power supply control module, an electromagnet and a pressure sensor, and is characterized in that the cover plate and the base form a piston structure, and the locking seat, the magnet and the electromagnet form a magnet locking structure; whether the power supply control module supplies power to the electromagnet or not is controlled through the water inlet switch and the pressure sensor, locking and unlocking of the magnet clamping and locking structure are achieved through whether the power supply control module supplies power to the electromagnet or not, and triggering conditions are set through the valve. The invention has the advantages of no failure or abnormal triggering problem caused by material performance reduction, longer service life, higher reliability, reusability, capability of quickly recovering to a normal use state even under the condition of personnel misoperation or false triggering caused by environment, capability of reducing navigation hidden dangers and periodic maintenance cost consumption, and capability of improving the working efficiency. And the triggering condition can be accurately set, and the application range is wide.

Description

Technical Field

[0001] The invention relates to a hydrostatic pressure release device, in particular to a magnetic hydrostatic pressure release device. Background Art

[0002] A hydrostatic release is a device used to attach free-floating devices such as life rafts and satellite emergency radio beacons to ships, and can be released automatically or manually when the ship sinks or otherwise needs to be released. As the hydrostatic release is related to the safety of ship navigation, its design requires reliability and stability, sensitive triggering, and the ability to withstand general wave impact without being triggered.

[0003] The traditional hydrostatic pressure releaser is a mechanical structure device, which is formed by opening a chamber on a base and arranging a diaphragm, a spring and a blade in the chamber. In the initial state, the spring presses the blade, and the diaphragm contacts the spring and does not apply force to the spring. When water enters the chamber, the diaphragm is deformed under the action of water pressure and acts on the spring, lifting the spring. At this time, the blade is released and bounces up to cut off the rope that suspends the free-floating device set on the base, thereby realizing the automatic release of the free-floating device.

[0004] However, the traditional hydrostatic pressure releaser has the following disadvantages: 1) The diaphragm, the main component for detecting pressure, has a service life. As time goes by, its material properties will gradually decay, which may cause the hydrostatic pressure releaser to fail or be abnormally triggered. It has a short service life and low reliability. In addition, since the diaphragm triggering and the blade cutting the rope are both consumable actions, the hydrostatic pressure releaser can only be used once and cannot be reused. Abnormal false triggering will cause the hydrostatic pressure releaser to be scrapped, bringing subsequent hidden dangers to navigation; 2) Regular maintenance is required to reduce the safety hazards caused by the failure or abnormal triggering of the hydrostatic pressure releaser, and regular maintenance requires the direct replacement of a new hydrostatic pressure releaser, which is costly; 3) Due to the large error in the diaphragm deformation, the triggering condition is vague, so that the triggering range of the traditional hydrostatic pressure releaser is wide, and it is difficult to adjust the parameters according to actual conditions, and the scope of use is single. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a magnetic hydrostatic pressure release device which does not have failure or abnormal triggering problems caused by reduced material properties, has a long service life, high reliability, and can be reused. Even in the event of false triggering caused by human error or the environment, it can quickly return to normal use, can reduce navigation hazards and regular maintenance costs, and the triggering conditions can be accurately set, with a wide range of uses.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a magnetic hydrostatic pressure release device, including a cylindrical base and a strap, one end of the strap is fixed to the top of the base, a chamber with an opening at the lower end is provided on the base, and the chamber is cylindrical coaxial with the base. The magnetic hydrostatic pressure release device also includes a cylindrical locking seat, a cover plate, a magnet, a water entry switch, a valve, a power supply control module, an electromagnet and a pressure sensor; a locking cavity with an opening at the lower end is provided on the locking seat, the locking cavity is coaxial with the locking block, the locking seat is coaxially fixed to the top of the base, and the base The top of the seat closes the lower end opening of the locking cavity, the magnet is in the shape of a disc, the magnet is arranged in the locking cavity, the other end of the strap is fixed to the upper end surface of the magnet, and the side wall of the locking seat is provided with an arc opening coaxial with the magnet, the height of the arc opening is greater than the thickness of the magnet, and the arc opening is used for the magnet to enter and exit the locking cavity; the power supply control module, the electromagnet and the pressure sensor are all located in the cavity and are respectively installed on the top of the cavity, the electromagnet is composed of a cylindrical iron core and a coil wound on the iron core, and the iron The core is coaxially arranged with the chamber, two blocks are arranged at intervals on the lower side wall of the chamber, the cover plate is a circular plate, the cover plate is coaxially arranged in the chamber, and is located below the pressure sensor, the outer side surface of the cover plate is in contact with the side wall of the chamber, the cover plate can move up and down in the chamber under force, the chamber is located above the cover plate to form a closed air pressure chamber, when the air pressure in the air pressure chamber is equal to the air pressure outside it, the lower end surface of the cover plate contacts with the two blocks and is supported by the two blocks, and the upper end surface of the cover plate contacts with the pressure sensor, the pressure sensor The pressure received by the device from the cover plate is 0, the power supply control module is respectively connected to the water inlet switch, the electromagnet and the pressure sensor, and a threshold voltage is set at the power supply control module. When the water inlet switch is closed and the voltage signal output by the pressure sensor is greater than or equal to the threshold voltage, the power supply control module can supply power to the electromagnet; the valve is arranged on the side wall of the base, when the valve is opened, the air pressure chamber is connected to the outside, and when the valve is closed, the air pressure chamber is isolated from the outside; the base and the locking seat are both made of non-magnetic materials.

[0007] Compared with the prior art, the advantage of the present invention lies in that by arranging a locking seat, a cover plate, a magnet, a water entry switch, a valve, a power supply control module, an electromagnet and a pressure sensor, the cover plate and the base form a piston structure. When the pressure inside and outside the cover plate is unbalanced, the cover plate will move up and down in the chamber, so that the pressure sensor generates a corresponding voltage signal output. When the free floating device is not hung on the strap and the water entry switch is not closed, the electromagnet is not energized and the magnet will not be subjected to the tension from the strap, that is, the tension of the strap on the magnet is 0, the magnet will remain horizontal in the locking cavity, supported by the top of the base, and at the same time the magnet will attract the iron core, and mutual attraction will be generated between the magnet and the iron core, that is, the magnet will also be subjected to the attraction from the iron core; when the free floating device is hung on the strap and the water entry switch is not closed, the electromagnet is not energized and the magnet will be subjected to the attraction from the iron core. The magnet is pulled by the tension from the strap, but because the strap is a belt-like object with a changeable shape, the direction of the tension applied by the strap to the magnet is uncertain. At the same time, the magnet will attract the iron core, and mutual attraction will be generated between the magnet and the iron core, that is, the magnet will also be attracted by the iron core, and the magnet as a whole will be unbalanced. Since the tension will be greater than the attraction of the iron core, the magnet will rotate clockwise in the locking cavity until one end of the magnet rests on the top of the locking cavity and the other end rests on the top of the base and is fixed. At this time, the magnetic hydrostatic pressure release device is in a locked state, and the free floating device is locked by the magnetic hydrostatic pressure release device and cannot be detached; when the free floating device is hung on the strap, the water entry switch is closed, but the voltage signal output by the pressure sensor is less than the threshold voltage, the electromagnet is not energized at this time, and the magnetic hydrostatic pressure release device remains in a locked state;When the free floating device is hung on the strap, the water entry switch is closed, and the voltage signal output by the pressure sensor is greater than or equal to the threshold voltage, the power supply control module supplies power to the electromagnet, and the electromagnet is energized. According to the principle of electromagnetic induction, the iron core of the electromagnet will be magnetized to produce the same magnetic polarity as the magnet. Like poles repel each other, and the end of the magnet that was originally adsorbed against the top of the base will be pushed up. At this time, the magnet rotates counterclockwise and moves upward. When the magnet rotates to a horizontal state, it will align with the arc opening. At this time, the magnet is pulled out of the arc opening by the strap, and the free floating device is released, unlocked, and carried on the ship to float freely. When installing, the base of the magnetic hydrostatic pressure release device is fixed to the side of the hull, and the free floating device is hung on the strap. At this time, the magnetic hydrostatic pressure release device has not entered the water, the water entry switch is not closed, the electromagnet is not energized, the magnetic hydrostatic pressure release device is in a locked state, and the free floating device is locked by the magnetic hydrostatic pressure release device. When the ship sinks, the magnetic hydrostatic pressure release device is submerged in water, the water entry switch is closed, and as the water entry depth increases, the external pressure will also increase. At this time, the force balance of the cover plate is broken, and the cover plate moves upward to squeeze the pressure sensor. The pressure sensor detects the pressure in real time. The pressure sensor generates force and outputs a corresponding voltage signal to the power supply control module. When the voltage signal output by the pressure sensor is greater than or equal to the voltage threshold, the power supply control module supplies power to the electromagnet. At this time, the electromagnet is energized. According to the principle of electromagnetic induction, the iron core of the electromagnet will be magnetized to produce the same magnetic polarity as the magnet. Like poles repel each other, and the end of the magnet originally adsorbed on the top of the base will be pushed up. At this time, the magnet rotates counterclockwise and moves upward. When the magnet rotates to a horizontal state, it will align with the arc opening. At this time, the magnet is pulled out of the arc opening by the strap, and the free floating device is released to complete the unlocking. The present invention adopts an electromagnetic structure to obtain It replaces the traditional diaphragm spring mechanical structure, and there is no failure or abnormal triggering problem caused by reduced material performance. It has a long service life and high reliability. In dry conditions, it can be unlocked by changing the magnet position through tools. It can be reused. Even if there is a false trigger caused by human error or the environment, it can quickly return to normal use, which can reduce navigation hazards and regular maintenance costs. In addition, through the setting of the valve, the air pressure in the air pressure chamber can be adjusted, thereby changing the water depth at which the cover is touched and moves upward. The triggering conditions can be set accurately, which greatly increases flexibility and has a wide range of uses. ;

[0008] Furthermore, the power supply control module includes a power supply module and a switch control circuit, the power supply module has a positive output terminal and a negative output terminal, the switch control circuit has an input terminal, an output terminal, a control terminal and a ground terminal, the pressure sensor has an input terminal, an output terminal and a ground terminal, the positive output terminal of the power supply module is connected to the input terminal of the switch control circuit, the negative output terminal of the power supply module is connected to one end of the water inlet switch, the control terminal of the switch control circuit is connected to the output terminal of the pressure sensor, the input terminal of the pressure sensor is in contact with the cover plate, the output terminal of the switch control circuit is connected to one end of the coil, and the other end of the water inlet switch is connected to the control terminal of the switch control circuit. The end, the ground end of the switch control circuit, the ground end of the pressure sensor and the other end of the coil are all grounded; when the water inlet switch is closed, a path is formed between the positive output end and the negative output end of the power module, and when the water inlet switch is not closed, a circuit is formed between the positive output end and the negative output end of the power module, and the voltage threshold is set at the switch control circuit. When the voltage signal output by the pressure sensor is greater than or equal to the voltage threshold, the input end and the output end of the switch control circuit are connected, and when the voltage signal output by the pressure sensor is less than the voltage threshold, the input end and the output end of the switch control circuit are cut off.

[0009] Furthermore, the power module includes a battery and a first capacitor, the first capacitor is an electrolytic capacitor, the positive electrode of the battery is connected to the positive electrode of the first capacitor, and the connection end thereof is the positive output end of the power module, and the negative electrode of the battery is connected to the negative electrode of the first capacitor, and the connection end thereof is the negative output end of the power module.

[0010] Furthermore, the switch control circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor and a second transistor, the first transistor is a PNP transistor, the second transistor is an NPN transistor, one end of the first resistor is connected to the emitter of the first transistor, and its connection end is the input end of the switch control circuit, the other end of the first resistor, the base of the first transistor and one end of the fourth resistor are connected, and their connection end is the ground end of the switch control circuit, the collector of the first transistor, one end of the second resistor and one end of the third resistor are connected, the other end of the second resistor is connected to the base of the second transistor, and its connection end is the control end of the switch control circuit, the other end of the third resistor is connected to the collector of the second transistor, the emitter of the second transistor is connected to the other end of the fourth resistor, and its connection end is the output end of the switch control circuit.

[0011] Furthermore, one end of the binding strap is fixed to the top of the base by a rivet, and the other end of the binding strap is fixed to the upper end surface of the magnet by a rivet.

[0012] Furthermore, the other end of the binding strap is fixed at a position on the upper end surface of the magnet that deviates from the center of the upper end surface of the magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The three-dimensional magnetic hydrostatic pressure release device of the present invention is Figure 1 ;

[0014] Figure 2 The three-dimensional magnetic hydrostatic pressure release device of the present invention is Figure 2 ;

[0015] Figure 3 It is a cross-sectional view of the magnetic hydrostatic pressure release device of the present invention after removing the straps and magnets;

[0016] Figure 4 is a cross-sectional view of the magnetic hydrostatic pressure release device of the present invention in an initial state;

[0017] Figure 5 It is a cross-sectional view of the magnetic hydrostatic pressure release device of the present invention in a locked state;

[0018] Figure 6 It is a cross-sectional view of the magnetic hydrostatic pressure release device of the present invention in an unlocked state;

[0019] Figure 7 It is a schematic diagram of the electrical connection principle of the magnetic hydrostatic pressure release device of the present invention;

[0020] Figure 8 The present invention is a circuit connection diagram of a water entry switch, a power supply control module, an electromagnet and a pressure sensor of the magnetic hydrostatic pressure release device. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] Embodiment 1: Figures 1 to 6As shown, a magnetic hydrostatic pressure release device comprises a cylindrical base 1 and a strap 2, one end of the strap 2 is fixed to the top of the base 1, a chamber with an opening at the lower end is provided on the base 1, and the chamber is cylindrical coaxial with the base 1, and the magnetic hydrostatic pressure release device also comprises a cylindrical locking seat 3, a cover plate 4, a magnet 5, a water entry switch S1, a valve 6, a power supply control module 11, an electromagnet YA and a pressure sensor PT; a locking cavity 31 with an opening at the lower end is provided on the locking seat 3, and the locking cavity 31 is coaxial with the locking block, and the locking seat 3 is coaxially fixed to the top of the base 1, and the base The top of the seat 1 closes the lower end opening of the locking cavity 31. The magnet 5 is in the shape of a disc and is arranged in the locking cavity 31. The other end of the strap 2 is fixed to the upper end surface of the magnet 5. An arc opening 32 coaxial with the magnet 5 is provided on the side wall of the locking seat 3. The height of the arc opening 32 is greater than the thickness of the magnet 5. The arc opening 32 is used for the magnet 5 to enter and exit the locking cavity 31. The power supply control module 11, the electromagnet YA and the pressure sensor PT are all located in the cavity and are respectively installed on the top of the cavity. The electromagnet YA is composed of a cylindrical iron core 7 and a coil 8 wound on the iron core 7. The core 7 is coaxially arranged with the chamber, and two stoppers 9 are arranged at intervals on the lower side wall of the chamber. The cover plate 4 is a circular plate, which is coaxially arranged in the chamber and is located below the pressure sensor PT. The outer side surface of the cover plate 4 is in contact with the side wall of the chamber. The cover plate 4 can move up and down in the chamber under force. The chamber is located above the cover plate 4 to form a closed air pressure chamber 10. When the air pressure in the air pressure chamber 10 is equal to the air pressure outside it, the lower end surface of the cover plate 4 contacts with the two stoppers 9 and is supported by the two stoppers 9, and the upper end surface of the cover plate 4 contacts with the pressure sensor PT. The pressure sensor PT The pressure from the cover plate 4 is 0, and the power supply control module 11 is connected to the water inlet switch S1, the electromagnet YA and the pressure sensor PT respectively. A threshold voltage is set at the power supply control module 11. When the water inlet switch S1 is closed and the voltage signal output by the pressure sensor PT is greater than or equal to the threshold voltage, the power supply control module 11 can supply power to the electromagnet YA; the valve 6 is set on the side wall of the base 1, when the valve 6 is opened, the air pressure chamber 10 is connected to the outside, and when the valve 6 is closed, the air pressure chamber 10 is isolated from the outside; the base 1 and the locking seat 3 are both made of non-magnetic materials.

[0023] In this embodiment, the cover plate 4 and the base 1 form a piston structure. When the pressure inside and outside the cover plate 4 is unbalanced, the cover plate 4 will move up and down in the chamber, so that the pressure sensor PT generates a corresponding voltage signal output. When the free floating device is not hung on the strap 2 and the water entry switch S1 is not closed, the electromagnet YA is not energized, and the magnet 5 will not be subjected to the tension from the strap 2, that is, the tension of the strap 2 on the magnet 5 is 0, and the magnet 5 will remain horizontal in the locking cavity 31 and be supported by the top of the base 1. At the same time, the magnet 5 will attract the iron core 7, and generate mutual attraction between the iron core 7, that is, the magnet 5 will also be subjected to the attraction from the iron core 7; when the free floating device is hung on the strap 2 and the water entry switch S1 is not closed, the electromagnet YA is not energized, and the magnet 5 will be pulled by the tension from the strap 2, but because the strap 2 is The belt-shaped object has various shapes, and the direction of the pulling force applied by the strap 2 to the magnet 5 is uncertain. At the same time, the magnet 5 will attract the iron core 7, and a mutual attraction will be generated between the magnet 5 and the iron core 7, that is, the magnet 5 will also be attracted by the iron core 7, and the magnet 5 as a whole will be unbalanced. Since the pulling force will be greater than the attraction of the iron core 7, the magnet 5 will rotate clockwise in the locking cavity 31 until one end of the magnet 5 is against the top of the locking cavity 31 and the other end is against the top of the base 1 and is fixed. At this time, the magnetic hydrostatic pressure release device is in a locked state, and the free floating device is locked by the magnetic hydrostatic pressure release device and cannot be detached; when the free floating device is hung on the strap 2, the water entry switch S1 is closed, but the voltage signal output by the pressure sensor PT is less than the threshold voltage, the electromagnet YA is not energized, and the magnetic hydrostatic pressure release device remains in a locked state;When the free floating device is hung on the strap 2, the water entry switch S1 is closed, and the voltage signal output by the pressure sensor PT is greater than or equal to the threshold voltage, the power supply control module 11 supplies power to the electromagnet YA, and the electromagnet YA is energized. According to the principle of electromagnetic induction, the iron core 7 of the electromagnet YA will be magnetized to produce the same magnetic polarity as the magnet 5. Like poles repel each other, and the end of the magnet 5 originally adsorbed on the top of the base 1 is pushed up. At this time, the magnet 5 rotates counterclockwise and moves upward. When the magnet 5 rotates to a horizontal state, it will align with the arc opening 32. At this time, the magnet 5 is pulled out of the arc opening 32 by the strap 2, and the free floating device is released, completing the unlocking. When the free floating device is carried on board, the base 1 of the magnetic hydrostatic pressure release device is fixed on the side of the hull, and the free floating device is hung on the strap 2. At this time, the magnetic hydrostatic pressure release device has not entered the water, the water entry switch S1 is not closed, the electromagnet YA is not energized, the magnetic hydrostatic pressure release device is in a locked state, and the free floating device is locked by the magnetic hydrostatic pressure release device. When the ship sinks, the magnetic hydrostatic pressure release device is submerged in the water, the water entry switch S1 is closed, and as the water entry depth increases, the external pressure will also increase. At this time, the force balance of the cover plate 4 is broken, and the cover plate 4 moves upward to squeeze the pressure sensor PT, and the pressure sensor P T detects the pressure in real time and outputs the corresponding voltage signal to the power supply control module 11. When the voltage signal output by the pressure sensor PT is greater than or equal to the voltage threshold, the power supply control module 11 supplies power to the electromagnet YA. At this time, the electromagnet YA is energized. According to the principle of electromagnetic induction, the iron core 7 of the electromagnet YA will be magnetized to produce the same magnetic polarity as the magnet 5. Like poles repel each other, and the end of the originally adsorbed magnet 5 against the top of the base 1 is pushed up. At this time, the magnet 5 rotates counterclockwise and moves upward. When the magnet 5 rotates to a horizontal state, it will align with the arc opening 32. At this time, the magnet 5 is pulled out of the arc opening 32 by the strap 2, and the free floating device is released, completing Unlocking, the present invention adopts electromagnetic structure to replace the traditional diaphragm spring mechanical structure, there is no failure or abnormal triggering problem caused by reduced material performance, long service life, high reliability, and can be unlocked by changing the magnet orientation by tools in dry conditions, can be reused, even if there is a false trigger caused by human misoperation or environment, it can quickly restore to normal use, can reduce navigation hazards and regular maintenance cost consumption, and through the setting of valve 6, the air pressure in the air pressure chamber 10 can be adjusted, thereby changing the water depth at which the cover plate 4 is touched and moves upward, the triggering condition can be accurately set, greatly increasing flexibility, and a wide range of use. ;

[0024] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that: in this embodiment, Figure 7As shown, the power supply control module 11 includes a power supply module and a switch control circuit, the power supply module has a positive output terminal and a negative output terminal, the switch control circuit has an input terminal, an output terminal, a control terminal and a ground terminal, the pressure sensor PT has an input terminal, an output terminal and a ground terminal, the positive output terminal of the power supply module is connected to the input terminal of the switch control circuit, the negative output terminal of the power supply module is connected to one end of the water inlet switch S1, the control terminal of the switch control circuit is connected to the output terminal of the pressure sensor PT, the input terminal of the pressure sensor PT is in contact with the cover plate 4, the output terminal of the switch control circuit is connected to one end of the coil 8, and the other end of the water inlet switch S1 is connected to the control terminal of the switch control circuit. The end, the ground end of the switch control circuit, the ground end of the pressure sensor PT and the other end of the coil 8 are all grounded; when the water inlet switch S1 is closed, a path is formed between the positive output end and the negative output end of the power module, and when the water inlet switch S1 is not closed, a short circuit is formed between the positive output end and the negative output end of the power module. The voltage threshold is set at the switch control circuit. When the voltage signal output by the pressure sensor PT is greater than or equal to the voltage threshold, the input end and the output end of the switch control circuit are connected. When the voltage signal output by the pressure sensor PT is less than the voltage threshold, the input end and the output end of the switch control circuit are cut off.

[0025] In the present embodiment, a path is formed between the positive output terminal and the negative output terminal of the power module only when the water entry switch S1 is closed. Therefore, when the magnetic hydrostatic pressure release device is not placed in water, i.e., not in use, the power module is in a non-working state, thereby avoiding waste of power and ensuring sufficient electrical energy during actual use.

[0026] Embodiment 3: This embodiment is basically the same as Embodiment 2, except that: in this embodiment, Figure 8 As shown, the power module includes a battery BT1 and a first capacitor C1, the first capacitor C1 is an electrolytic capacitor, the positive electrode of the battery BT1 is connected to the positive electrode of the first capacitor C1, and the connection end thereof is the positive output end of the power module, and the negative electrode of the battery BT1 is connected to the negative electrode of the first capacitor C1, and the connection end thereof is the negative output end of the power module.

[0027] In this embodiment, the switch control circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first transistor Q1, and a second transistor Q2. The first transistor Q1 is a PNP transistor, and the second transistor Q2 is an NPN transistor. One end of the first resistor R1 is connected to the emitter of the first transistor Q1, and the connection end thereof is the input end of the switch control circuit. The other end of the first resistor R1, the base of the first transistor Q1, and one end of the fourth resistor R4 are connected, and the connection end thereof is the ground end of the switch control circuit. The collector of the first transistor Q1, one end of the second resistor R2, and one end of the third resistor R3 are connected. The other end of the second resistor R2 is connected to the base of the second transistor Q2, and the connection end thereof is the control end of the switch control circuit. The other end of the third resistor R3 is connected to the collector of the second transistor Q2. The emitter of the second transistor Q2 is connected to the other end of the fourth resistor R4, and the connection end thereof is the output end of the switch control circuit.

[0028] In this embodiment, the water inlet switch S1 is closed to control the formation of a loop between the positive and negative electrodes of the battery BT1, so that the battery BT1 can output voltage for power supply. By using the conduction voltage of the second transistor Q2 as the threshold voltage, when the voltage signal output by the pressure sensor PT is greater than or equal to the threshold voltage, the collector and emitter of the second transistor Q2 are turned on, and the electromagnet YA can be powered. Therefore, the power supply control module 11 is realized by using simple separation components, which is cost-effective and has high reliability.

[0029] Embodiment 4: This embodiment is basically the same as Embodiment 1, except that: in this embodiment, one end of the strap 2 is fixed to the top of the base 1 by a rivet, and the other end of the strap 2 is fixed to the upper end surface of the magnet 5 by a rivet.

[0030] In this embodiment, the connection between the strap 2, the base 1 and the magnet 5 is achieved by rivets, which makes assembly and disassembly more convenient.

[0031] Embodiment 5: This embodiment is basically the same as Embodiment 1, except that: in this embodiment, the other end of the strap 2 is deviated from the center of the upper end surface of the magnet 5 at the fixed position on the upper end surface of the magnet 5.

[0032] In this embodiment, the eccentric setting of the fixing point between the binding strap 2 and the magnet 5 further promotes the unbalanced force on the magnet 5, thereby achieving a fast and reliable locking process.

[0033] To sum up, the magnetic hydrostatic pressure release device of the present invention adopts an electromagnetic structure to replace the traditional diaphragm spring mechanical structure. There is no failure or abnormal triggering problem caused by reduced material properties. It has a long service life and high reliability. In dry conditions, it can be unlocked by changing the orientation of the magnet through tools. It can be reused. Even if it is triggered by human error or the environment, it can quickly return to normal use. It can reduce navigation hazards and regular maintenance costs. Through the setting of valve 6, the air pressure in the air pressure chamber 10 can be adjusted, thereby changing the water depth at which the cover plate 4 is touched and moves upward. The triggering conditions can be set accurately, which greatly increases flexibility and has a wide range of uses.

Claims

1. A magnetic hydrostatic pressure release device, comprising a cylindrical base and a strap, one end of the strap is fixed to the top of the base, a chamber with an open lower end is formed on the base, and the chamber is cylindrical and coaxial with the base, characterized in that The magnetic hydrostatic pressure release device also includes a cylindrical locking seat, a cover plate, a magnet, a water entry switch, a valve, a power supply control module, an electromagnet and a pressure sensor; a locking cavity with a lower end opening is provided on the locking seat, the locking cavity is coaxial with the locking block, the locking seat is coaxially fixed to the top of the base, the top of the base closes the lower end opening of the locking cavity, the magnet is disc-shaped, the magnet is arranged in the locking cavity, the other end of the strap is fixed to the upper end surface of the magnet, the side wall of the locking seat is provided with an arc opening coaxial with the magnet, the height of the arc opening is greater than the thickness of the magnet, and the arc opening is used for the magnet to enter and exit the locking cavity; The power supply control module, the electromagnet and the pressure sensor are all located in the chamber and are respectively installed on the top of the chamber. The electromagnet is composed of a cylindrical iron core and a coil wound on the iron core. The iron core is coaxially arranged with the chamber. Two blocks are arranged at intervals on the lower side wall of the chamber. The cover plate is a circular plate. The cover plate is coaxially arranged in the chamber and is located below the pressure sensor. The outer side surface of the cover plate is in contact with the side wall of the chamber. The cover plate can move up and down in the chamber under force. The chamber is located above the cover plate to form a closed air pressure chamber. When the air pressure in the air pressure chamber is equal to the air pressure outside it, the lower end surface of the cover plate is in contact with the two blocks. The cover plate is in contact with the pressure sensor, the pressure on the pressure sensor from the cover plate is 0, the power supply control module is respectively connected with the water inlet switch, the electromagnet and the pressure sensor, a threshold voltage is arranged at the power supply control module, when the water inlet switch is closed and the voltage signal output by the pressure sensor is greater than or equal to the threshold voltage, the power supply control module can supply power to the electromagnet; the valve is arranged on the side wall of the base, when the valve is opened, the air pressure chamber is communicated with the outside, when the valve is closed, the air pressure chamber is isolated from the outside; the base and the locking seat are both made of non-magnetic materials.

2. A magnetic hydrostatic pressure release device according to claim 1, characterized in that The power supply control module includes a power supply module and a switch control circuit. The power supply module has a positive output terminal and a negative output terminal. The switch control circuit has an input terminal, an output terminal, a control terminal and a ground terminal. The pressure sensor has an input terminal, an output terminal and a ground terminal. The positive output terminal of the power supply module is connected to the input terminal of the switch control circuit. The negative output terminal of the power supply module is connected to one end of the water inlet switch. The control terminal of the switch control circuit is connected to the output terminal of the pressure sensor. The input terminal of the pressure sensor is in contact with the cover plate. The output terminal of the switch control circuit is connected to one end of the coil. The other end of the water inlet switch, the The ground terminal of the switch control circuit, the ground terminal of the pressure sensor and the other end of the coil are all grounded; when the water inlet switch is closed, a path is formed between the positive output terminal and the negative output terminal of the power module, and when the water inlet switch is not closed, a short circuit is formed between the positive output terminal and the negative output terminal of the power module. The voltage threshold is set at the switch control circuit. When the voltage signal output by the pressure sensor is greater than or equal to the voltage threshold, the input terminal and the output terminal of the switch control circuit are connected. When the voltage signal output by the pressure sensor is less than the voltage threshold, the input terminal and the output terminal of the switch control circuit are cut off.

3. A magnetic hydrostatic pressure release device according to claim 2, characterized in that The power module includes a battery and a first capacitor, the first capacitor is an electrolytic capacitor, the positive electrode of the battery is connected to the positive electrode of the first capacitor, and the connection end is the positive output end of the power module, and the negative electrode of the battery is connected to the negative electrode of the first capacitor, and the connection end is the negative output end of the power module.

4. A magnetic hydrostatic pressure release device according to claim 2, characterized in that The switch control circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor and a second transistor. The first transistor is a PNP transistor, the second transistor is an NPN transistor, one end of the first resistor is connected to the emitter of the first transistor, and its connection end is the input end of the switch control circuit, the other end of the first resistor, the base of the first transistor and one end of the fourth resistor are connected, and the connection end is the ground end of the switch control circuit, the collector of the first transistor, one end of the second resistor and one end of the third resistor are connected, the other end of the second resistor is connected to the base of the second transistor, and its connection end is the control end of the switch control circuit, the other end of the third resistor is connected to the collector of the second transistor, the emitter of the second transistor is connected to the other end of the fourth resistor, and its connection end is the output end of the switch control circuit.

5. The magnetic hydrostatic pressure release device according to claim 1, characterized in that One end of the binding strap is fixed to the top of the base through a rivet, and the other end of the binding strap is fixed to the upper end surface of the magnet through a rivet.

6. A magnetic hydrostatic pressure release device according to claim 1, characterized in that The other end of the binding strap is deviated from the center of the upper end surface of the magnet at a fixing position on the upper end surface of the magnet.

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