Electrically powered automatically controlled breather valve

Abstract

The application discloses an electric automatic control breathing valve and belongs to the field of breathing valves. The bottom end of a positive pressure valve shell of the breathing valve is arranged in a storage tank; a positive pressure valve seat is clamped in the positive pressure valve shell; a positive pressure valve disc is arranged on the positive pressure valve seat; a positive pressure valve cover is arranged on the top of the positive pressure valve shell; a negative pressure valve shell is communicated with the positive pressure valve shell; a negative pressure valve seat is clamped in the negative pressure valve shell; a negative pressure valve disc is arranged on the negative pressure valve seat; a negative pressure valve cover is arranged on the top of the negative pressure valve shell; a pressure sensor is arranged on the side wall between the positive pressure valve seat and the storage tank; a first lifting mechanism is inserted into the positive pressure valve cover; a first magnetic force generating piece is arranged at the bottom of the first lifting mechanism; a first magnetic absorbing piece is fixedly arranged on the top surface of the positive pressure valve disc; the first switch and the pressure sensor are electrically connected with a control mechanism; and a flowmeter is arranged at a positive pressure outlet. The application can solve the problem that the existing breathing valve is prone to causing the phenomenon that the storage tank is in overpositive pressure and overnegative pressure, and further causing the problem of the bottom warping or the storage tank being deflated.

Description

Technical Field

[0001] This application relates to the field of breathing valve technology, and more particularly to an electrically operated automatic control breathing valve. Background Technology

[0002] In the fields of petrochemical energy storage and transportation, breather valves are the main equipment in the breathing system of storage tanks. Due to the special nature of the storage tank operation process, breather valves play an important role in the safe operation and environmental protection requirements of the storage tanks. A breather valve ensures that the storage tank space is isolated from the atmosphere within a certain pressure range, while also allowing communication with the atmosphere when the pressure exceeds or falls below this range. Its function is to prevent damage to the storage tank due to overpressure or vacuum, and at the same time, to reduce evaporation losses during liquid injection.

[0003] Currently, the medium inside heavy oil storage tanks is prone to polymer formation. This polymer can easily cause the positive pressure valve disc and seat of the breather valve to stick together. When sticking occurs, existing mechanical breather valves can only overcome this sticking force by continuously increasing the internal pressure of the storage tank to open the positive pressure valve disc. This can easily lead to excessive positive pressure in the storage tank, which in turn can cause the tank to bottom out. Utility Model Content

[0004] This application provides an electrically operated automatic control breather valve, which solves the problem that existing breather valves are prone to causing excessive positive pressure in storage tanks, thereby leading to tank bottoming accidents.

[0005] To achieve the above objectives, the technical solution of this utility model embodiment is as follows:

[0006] This utility model provides an electrically operated automatic control breathing valve, including a positive pressure valve housing, a positive pressure valve seat, a positive pressure valve disc, a positive pressure valve cover, a negative pressure valve housing, a negative pressure valve seat, a negative pressure valve disc, a negative pressure valve cover, a pressure sensor, a first magnetic force generating element, a first lifting mechanism, a power supply, a first switch, a first magnetic attracting element, a flow meter, and a control mechanism;

[0007] The bottom end of the positive pressure valve body is located in the storage tank;

[0008] The positive pressure valve seat is engaged with the positive pressure valve body;

[0009] The positive pressure valve disc is disposed on the positive pressure valve seat;

[0010] The positive pressure valve cover is disposed on the top of the positive pressure valve housing;

[0011] The negative pressure valve housing is connected to the positive pressure valve housing;

[0012] The negative pressure valve seat is engaged with the negative pressure valve body;

[0013] The negative pressure valve disc is disposed on the negative pressure valve seat;

[0014] The negative pressure valve cover is disposed on the top of the negative pressure valve housing;

[0015] The pressure sensor is disposed on the side wall between the positive pressure valve seat and the storage tank;

[0016] The first lifting mechanism is inserted into the positive pressure valve cover;

[0017] The first magnetic force generating component is disposed at the bottom of the first lifting mechanism;

[0018] The power supply is sequentially connected to the first switch, the first lifting mechanism, and the first magnetic force generating component;

[0019] The first magnetic attracting element is fixed to the top surface of the positive pressure valve disc;

[0020] The first switch and the pressure sensor are both electrically connected to the control mechanism;

[0021] The flow meter is installed at the positive pressure outlet.

[0022] In conjunction with the first aspect, in one possible implementation, the electrically operated automatic control breathing valve further includes a second magnetic force generating element, a second lifting mechanism, a second switch, and a second magnetic attracting element;

[0023] The second lifting mechanism is inserted into the negative pressure valve cover;

[0024] The second magnetic force generating component is disposed at the bottom of the second lifting mechanism;

[0025] The power supply is sequentially connected to the second switch, the second lifting mechanism, and the second magnetic force generating component;

[0026] The second magnetic attracting element is fixed to the top surface of the negative pressure valve disc;

[0027] The second switch is electrically connected to the control mechanism.

[0028] In one possible implementation, the first magnetic force generating element and / or the second magnetic force generating element are magnetic coils.

[0029] In one possible implementation, the first magnetic element and / or the second magnetic element are made of a readily magnetic metal material.

[0030] In one possible implementation, the pressure sensor, the first magnetic attractor, and the second magnetic attractor are all explosion-proof.

[0031] In one possible implementation, when the first lifting mechanism moves down to its position, the distance between the bottom surface of the first magnetic force generating component and the top surface of the first magnetic attracting component is 10mm to 300mm.

[0032] And / or, when the second lifting mechanism moves down to its position, the distance between the bottom surface of the second magnetic force generating component and the top surface of the second magnetic attracting component is 10mm~300mm.

[0033] In one possible implementation, the weight of the negative pressure valve disc is 1 to 3 times the negative pressure opening pressure.

[0034] In one possible implementation, the weight of the positive pressure valve disc is 1 to 3 times the positive pressure opening pressure.

[0035] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0036] The electrically operated automatic control breathing valve provided in this embodiment of the invention uses a pressure sensor to measure the pressure value of the storage tank in real time and transmits the pressure value to the control mechanism. When the pressure value in the storage tank is lower than the opening pressure of the positive pressure valve disc, the first switch is in the open state, and the first magnetic force generating element does not work. When the pressure value is equal to or greater than the opening pressure of the positive pressure valve disc, the first magnetic force generating element is located at the bottom of the first lifting mechanism. The first lifting mechanism drives the first magnetic force generating element to move downward, and the control mechanism controls the first switch to open, supplying power to the first magnetic force generating element. At the same time, the first magnetic force generating element generates magnetic attraction force, attracting the first magnetic attractor. Then, the first lifting mechanism rises and drives the first magnetic attractor to rise. The first magnetic attractor drives the positive pressure valve disc to rise to the highest position, and the positive pressure valve seat is opened to the maximum, realizing rapid exhaust and pressure reduction, which can effectively and significantly reduce the pressure increase value. When the pressure value is less than the opening pressure of the positive pressure valve disc, the first lifting mechanism drives the first magnetic force generating element to move downward, the control mechanism controls the first switch to open, and the power supply to the first magnetic force generating element stops. As the magnetic force generated by the first magnetic force generator gradually decreases until it stops generating magnetic force, the positive pressure valve disc gradually falls back, sealing the positive pressure valve seat. Then, the first lifting mechanism drives the first magnetic force generator to rise. In this embodiment, the pressure sensor monitors the tank pressure in real time. The first lifting mechanism, the first magnetic force generator, the first magnetic attracting component, the power supply, and the first switch achieve magnetic control. The control mechanism receives the pressure sensor's measurement data and controls the start and stop of the magnetic system. The electromagnetic force generated by the first magnetic force generator directly attracts the first magnetic attracting component, which in turn attracts the positive pressure valve disc, overcoming adhesive forces. Actively applying magnetic force to the first magnetic attracting component results in a magnetic attraction force greater than the sum of the weight of the positive pressure valve disc, the first magnetic attracting component, and the adhesive force, instantly breaking the bond between the positive pressure valve disc and the positive pressure valve seat. By actively pulling the positive pressure valve disc with electromagnetic force, the "jamming" phenomenon caused by polymer adhesion is completely avoided, ensuring that the opening action is strictly synchronized with the pressure threshold. The pressure sensor continuously transmits data to the control mechanism. When the pressure value is greater than or equal to the opening pressure of the positive pressure valve disc, it immediately triggers the first lifting mechanism, the first magnetic force generating element, the first magnetic attraction element, the power supply, and the first switch, achieving a millisecond-level response. When the positive pressure valve disc needs to be opened, the electromagnetic force forcibly lifts the positive pressure valve disc, ensuring timely exhaust and pressure relief from the positive pressure outlet. After power failure, the positive pressure valve disc falls back to seal under its own weight without delay, avoiding the continuous pressure accumulation caused by the response lag of traditional mechanical breather valves. This strictly controls the tank pressure within the safe threshold, fundamentally preventing bottoming-out accidents caused by excessive positive pressure. The flow meter setting can count the amount of gas discharged from the tank each time the positive pressure valve disc is opened. This application embodiment yields a novel electric automatic control breather valve with high reliability, high sealing performance, low pressure build-up, anti-adhesion and freezing, and intelligent operation, greatly improving the probability of safe operation of the storage tank. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of an electrically operated automatic control breathing valve provided in an embodiment of this application.

[0039] Icons: 1-Positive pressure valve housing; 2-Positive pressure valve seat; 3-Positive pressure valve disc; 4-Positive pressure valve cover; 5-Negative pressure valve housing; 6-Negative pressure valve seat; 7-Negative pressure valve disc; 8-Negative pressure valve cover; 9-Pressure sensor; 10-First magnetic force generating element; 11-Power supply; 12-First switch; 13-First magnetic attraction element; 14-Control mechanism; 15-Second magnetic force generating element; 16-Second switch; 17-Second magnetic attraction element; 18-Negative pressure inlet; 19-Positive pressure outlet; 20-First lifting mechanism; 21-Second lifting mechanism; 22-Flow meter. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0041] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0042] Please refer to Figure 1 As shown, this utility model embodiment provides an electrically operated automatic control breathing valve, including a positive pressure valve housing 1, a positive pressure valve seat 2, a positive pressure valve disc 3, a positive pressure valve cover 4, a negative pressure valve housing 5, a negative pressure valve seat 6, a negative pressure valve disc 7, a negative pressure valve cover 8, a pressure sensor 9, a first magnetic force generating element 10, a first lifting mechanism 20, a power supply 11, a first switch 12, a first magnetic attracting element 13, a flow meter 22, and a control mechanism 14. The bottom end of the positive pressure valve housing 1 is fixed to the storage tank via a flange. The positive pressure valve seat 2 is engaged with the positive pressure valve housing 1. The positive pressure valve disc 3 is disposed on the positive pressure valve seat 2. The positive pressure valve cover 4 is disposed on the top of the positive pressure valve housing 1.

[0043] The negative pressure valve housing 5 is connected to the positive pressure valve housing 1. The negative pressure valve seat 6 is engaged with the negative pressure valve housing 5. The negative pressure valve disc 7 is disposed on the negative pressure valve seat 6. The negative pressure valve cover 8 is disposed on the top of the negative pressure valve housing 5. The pressure sensor 9 is disposed on the side wall between the positive pressure valve seat 2 and the storage tank, that is, on the upper part of the flange connection pipe of the positive pressure valve housing 1. The negative pressure valve housing 5 and the positive pressure valve housing 1 are arranged side by side, that is, the electric automatic control breather valve of this embodiment has a side-by-side structure.

[0044] The first lifting mechanism 20 is fixedly inserted into the positive pressure valve cover 4. The first magnetic force generating element 10 is disposed at the bottom of the first lifting mechanism 20. The first lifting mechanism 20 can be a hydraulic cylinder or a linear module, etc. The up and down movement of the first lifting mechanism 20 controls the up and down movement of the first magnetic force generating element 10, thereby controlling the opening and closing of the positive pressure valve disc 3. The power supply 11 is sequentially connected to the first switch 12, the first lifting mechanism 20, and the first magnetic force generating element 10. The power supply 11 is a 24V safety voltage or other safety voltage, and the input method is explosion-proof.

[0045] The first magnetic attracting component 13 is bolted and fixed to the top surface of the positive pressure valve disc 3. The total weight of the first magnetic attracting component 13 and the positive pressure valve disc 3 is greater than the weight required for the positive pressure valve disc 3 to open at pressure, but less than the weight required for the safe pressure of the storage tank. The first switch 12 and the pressure sensor 9 are both electrically connected to the control mechanism 14 via safety wires. The pressure sensor 9 continuously transmits the pressure data inside the storage tank to the control mechanism 14. The control mechanism 14 is electrically connected to the power supply 11 to control the power supply 11 to supply power to the first switch 12 and the first magnetic force generating component 10. The first lifting mechanism 20 drives the first magnetic force generating component 10 to rise or fall. When the first magnetic force generating component 10 is energized, the suction force generated by the first magnetic force generating component 10 is greater than or equal to the sum of the actual weights of the positive pressure valve disc 3 and the first magnetic attracting component 13. The configuration of the control mechanism 14, etc., enables remote and local alarms and real-time monitoring, significantly improving the safety management level of the storage tank and greatly reducing maintenance costs.

[0046] A flow meter 22 is installed at the positive pressure outlet. By installing the flow meter 22, the flow rate of exhaled gas in the storage tank can be counted when the positive pressure is activated. The data can be transmitted to the DCS of the system to calculate the daily VOCs emissions.

[0047] In the electric automatic control breathing valve provided in this embodiment, the pressure sensor 9 measures the pressure value of the storage tank in real time and transmits the pressure value to the control mechanism 14. When the pressure value in the storage tank is lower than the opening pressure of the positive pressure valve disc 3, the first switch 12 is in the open state, and the first magnetic force generating element 10 does not work. When the pressure value is equal to or greater than the opening pressure of the positive pressure valve disc 3, the first magnetic force generating element 10 is set at the bottom of the first lifting mechanism 20. The first lifting mechanism 20 drives the first magnetic force generating element 10 to move down, the control mechanism 14 controls the first switch 12 to connect, and the power supply 11 supplies power to the first magnetic force generating element 10. At the same time, the first magnetic force generating element 10 generates magnetic attraction force, attracting the first magnetic attracting element 13. Then the first lifting mechanism 20 rises and drives the first magnetic attracting element 13 to rise. The first magnetic attracting element 13 drives the positive pressure valve disc 3 to rise to the highest position, and the positive pressure valve seat 2 is opened to the maximum, realizing rapid exhaust and pressure reduction, which can effectively and significantly reduce the pressure increase value. When the pressure value is less than the opening pressure of the positive pressure valve disc 3, the first lifting mechanism 20 drives the first magnetic force generating element 10 to move downward, the control mechanism 14 controls the first switch 12 to open, and the power supply 11 stops supplying power to the first magnetic force generating element 10. The magnetic force of the first magnetic force generating element 10 gradually decreases until it stops generating magnetic force, the positive pressure valve disc 3 gradually falls back, and the positive pressure valve disc 3 closes the positive pressure valve seat 2. Then the first lifting mechanism 20 drives the first magnetic force generating element 10 to rise. In this embodiment of the utility model, the pressure sensor 9 monitors the pressure value of the storage tank in real time. The first lifting mechanism 20, the first magnetic force generating element 10, the first magnetic attracting element 13, the power supply 11, and the first switch 12 realize magnetic control. The control mechanism 14 receives the measurement data from the pressure sensor 9 and controls the start and stop of the magnetic system. The electromagnetic force generated by the first magnetic force generating element 10 directly attracts the first magnetic attracting element 13, and then attracts the positive pressure valve disc 3, which can overcome the adhesive force. Actively applying magnetic force to the first magnetic attractor 13, with a magnetic attraction greater than the sum of the weight of the positive pressure valve disc 3, the first magnetic attractor 13, and the adhesive force, can instantly break through the adhesion between the positive pressure valve disc 3 and the positive pressure valve seat 2. By actively pulling the positive pressure valve disc 3 through electromagnetic force, the "jamming" phenomenon caused by polymer adhesion is completely avoided, ensuring that the opening action is strictly synchronized with the pressure threshold. The pressure sensor 9 continuously transmits data to the control mechanism 14. When the pressure value is greater than or equal to the opening pressure of the positive pressure valve disc 3, the first lifting mechanism 20, the first magnetic force generator 10, the first magnetic attractor 13, the power supply 11, and the first switch 12 are immediately triggered, achieving a millisecond-level response. When the positive pressure valve disc 3 needs to be opened, electromagnetic force forcibly lifts the positive pressure valve disc 3, ensuring timely venting and pressure relief from the positive pressure outlet 19. After power failure, the positive pressure valve disc 3 falls back to seal under its own weight without delay, avoiding the continuous pressure accumulation caused by the lag in response of traditional mechanical breather valves. This strictly controls the tank pressure within the safe threshold, fundamentally preventing bottoming-out accidents caused by excessive positive pressure. The flow meter 22 is set to count the amount of gas discharged from the tank each time the positive pressure valve disc 3 is opened.This application provides a novel electric automatic control breather valve with high reliability, high sealing performance, low pressurization, anti-adhesion and freezing properties, and intelligent operation, which greatly improves the probability of safe operation of storage tanks.

[0048] In practice, polymers can easily cause the negative pressure valve disc 7 and negative pressure valve seat 6 of the breather valve to stick together, resulting in delayed air intake at the negative pressure inlet 18. When a vacuum forms in the storage tank, the air intake cannot be opened in time, which can easily lead to excessive negative pressure in the storage tank. The continuous action of external atmospheric pressure on the storage tank intensifies the internal vacuum and may even cause the storage tank to collapse. Traditional mechanical valves rely on the negative pressure inside the tank to overcome the adhesive force. When the adhesive force is greater than the negative pressure force, the negative pressure inlet 18 remains closed.

[0049] Continue to refer to Figure 1 As shown, the electrically operated automatic control breathing valve of this embodiment further includes a second magnetic force generating element 15, a second lifting mechanism 21, a second switch 16, and a second magnetic attracting element 17. The second lifting mechanism 21 is inserted and fixed to the negative pressure valve cover 8. The second magnetic force generating element 15 is disposed at the bottom of the second lifting mechanism 21. The second lifting mechanism 21 can be a hydraulic cylinder or a linear module, etc. The up and down movement of the second lifting mechanism 21 controls the up and down movement of the second magnetic force generating element 15, thereby controlling the opening and closing of the negative pressure valve disc 7. The power supply 11 is electrically connected to the second switch 16, the second lifting mechanism 21, and the second magnetic force generating element 15 in sequence. The second magnetic attracting element 17 is fixed to the top surface of the negative pressure valve disc 7. The total weight of the second magnetic attracting element 17 and the negative pressure valve disc 7 is greater than the weight required for the opening pressure of the negative pressure valve disc 7, but less than the weight required for the safe pressure of the storage tank. The second switch 16 is electrically connected to the control mechanism 14 through a safety wire. When the second magnetic force generating element 15 is energized, the suction force generated by the second magnetic force generating element 15 is greater than or equal to the sum of the actual weights of the negative pressure valve disc 7 and the second magnetic attracting element 17. Among them, the first switch 12, the second switch 16 and the control mechanism 14 are integrated explosion-proof structures, which are stable and reliable, and are installed on the outside of the positive pressure valve housing 1.

[0050] In actual use, when the pressure value is less than or equal to the opening pressure of the negative pressure valve disc 7, the second lifting mechanism 21 drives the second magnetic force generating element 15 to move downward. The second magnetic force generating element 15 is located at the bottom of the second lifting mechanism 21. The second lifting mechanism 21 drives the second magnetic force generating element 15 to move downward, and the control mechanism 14 controls the second switch 16 to connect, and the power supply 11 supplies power to the second magnetic force generating element 15. The second magnetic force generating element 15 generates magnetic attraction force, attracting the second magnetic attraction element 17. Then, the second lifting mechanism 21 rises and drives the second magnetic attraction element 15 and the second magnetic attraction element 17 to rise. The second magnetic attraction element 17 drives the negative pressure valve disc 7 to rise to the highest position, and the negative pressure valve seat 6 is opened to the maximum, realizing rapid air intake (air) pressure reduction, which can effectively and significantly reduce the pressure increase value, especially preventing tank collapse accidents caused by rapid over-negative pressure due to factors such as summer rainstorms. When the pressure value exceeds the opening pressure of the negative pressure valve disc 7, the second lifting mechanism 21 drives the second magnetic force generating element 15 to rise, the control mechanism 14 controls the second switch 16 to open, and the power supply 11 stops supplying power to the second magnetic force generating element 15. The magnetic force of the second magnetic force generating element 15 gradually decreases until it stops generating magnetic force, the second magnetic attraction element 17 and the negative pressure valve disc 7 gradually fall back, and the negative pressure valve disc 7 closes the negative pressure valve seat 6. Afterwards, the second lifting mechanism 21 drives the second magnetic force generating element 15 to rise.

[0051] In this embodiment of the invention, the pressure sensor 9 monitors the tank pressure in real time. The second lifting mechanism 21, the second magnetic force generating component 15, the second magnetic attracting component 17, the power supply 11, and the second switch 16 achieve magnetic control. The control mechanism 14 receives the measurement data from the pressure sensor 9 and controls the start and stop of the magnetic system. The electromagnetic force generated by the second magnetic force generating component 15 directly lifts the second magnetic attracting component 17, thereby lifting the negative pressure valve disc 7, which can overcome the adhesive force. When a magnetic force is actively applied to the second magnetic attracting component 17, the magnetic attraction force is greater than the sum of the weight of the negative pressure valve disc 7, the second magnetic attracting component 17, and the adhesive force. This can instantly break through the adhesion between the negative pressure valve disc 7 and the negative pressure valve seat 6. By actively pulling the negative pressure valve disc 7 with electromagnetic force, the "jamming" phenomenon of the valve disc caused by polymer adhesion is completely avoided, ensuring that the opening action is strictly synchronized with the pressure threshold. Pressure sensor 9 continuously transmits data to control mechanism 14. When the pressure value is less than or equal to the opening pressure of negative pressure valve disc 7, it immediately triggers the second lifting mechanism 21, the second magnetic force generating element 15, the second magnetic attracting element 17, the power supply 11, and the second switch 16, achieving millisecond-level response. When negative pressure valve disc 7 needs to be opened, electromagnetic force forcibly lifts it. After power failure, negative pressure valve disc 7 falls back to seal by its own weight, without delay. This avoids the continuous pressure accumulation caused by the lag in response of traditional mechanical breather valves, strictly controlling the tank pressure within the safe threshold and fundamentally preventing collapse accidents caused by excessive negative pressure. Currently, the negative pressure opening pressure is basically set at -295Pa. If the pressure is lower, it is difficult to manufacture negative pressure valve disc 7. However, the breather valve of this application can set the negative pressure opening pressure to 0Pa, which can completely avoid the accident of collapse due to excessive negative pressure.

[0052] Optionally, the first magnetic force generating element 10 and / or the second magnetic force generating element 15 are magnetic coils. The magnetic coils generate precise electromagnetic force through current control, enabling rapid response to signals from the control mechanism 14. The electromagnetic force can be generated instantaneously, overcoming the adhesion between the positive pressure valve disc 3 and the positive pressure valve seat 2, and between the negative pressure valve disc 7 and the negative pressure valve seat 6, avoiding the lag problem of traditional mechanical breather valves relying on tank pressure to slowly overcome adhesion. The magnetic coils have a simple structure, high reliability, and are easily integrated into the positive pressure valve disc 3 or the negative pressure valve disc 7, ensuring stable magnetic action and achieving air-to-air attraction without physical contact. The electromagnetic force of the magnetic coils can be precisely adjusted by controlling the current intensity to adapt to the weight and adhesion degree of the positive pressure valve disc 3 or the negative pressure valve disc 7, ensuring that the positive pressure valve disc 3 or the negative pressure valve disc 7 acts immediately when the opening pressure threshold is reached, ensuring precise synchronization of the breather valve's opening and closing. In the fault-redundancy design, the magnetic coil works in conjunction with other components (such as the control mechanism 14) to ensure that even if the pressure sensor 9 fails, the positive pressure valve disc 3 or the negative pressure valve disc 7 can still return to mechanical opening and closing by gravity. The active control of the magnetic coil significantly improves overall reliability. The electromagnetic coil uses low voltage, reducing electrical risks and making it suitable for flammable environments such as petrochemical plants. The durability and replaceability of the electromagnetic coil help reduce maintenance costs and increase the probability of long-term safe operation of the storage tank. This achieves efficient, rapid, and controllable magnetic force generation, fundamentally solving the adhesion problem of the positive pressure valve disc 3 or the negative pressure valve disc 7, and improving the system's response efficiency and reliability.

[0053] Furthermore, the first magnetic attracting element 13 and / or the second magnetic attracting element 17 are made of a readily magnetic metal material, such as an electromagnet. The readily magnetic material (such as a ferromagnetic material) has high permeability, enabling it to efficiently respond to the electromagnetic field of the magnetic coil and ensuring maximum magnetic attraction. This improves the lifting efficiency of the positive pressure valve disc 3 or the negative pressure valve disc 7, overcoming the "jamming" phenomenon caused by polymer adhesion. The readily magnetic metal requires only a weak magnetic field to generate strong attraction, optimizing energy efficiency and reducing the energy consumption of the power supply 11 (which operates at a safe 24V voltage).

[0054] The use of easily magnetically attracted metal materials ensures the stability of the opening and closing process (e.g., "the first magnetic attractor 13 lifts the positive pressure valve disc 3 to its highest position"), avoiding opening failures due to insufficient magnetic response of the material. Since the first magnetic attractor 13 is bolted to the top surface of the positive pressure valve disc 3, and the second magnetic attractor 17 is bolted to the top surface of the negative pressure valve disc 7, the strength of the easily magnetically attracted metal ensures durability during long-term use. The easily magnetically attracted metal is corrosion-resistant, and combined with the explosion-proof design, extends the component's lifespan. The easily magnetically attracted metal material is common and easy to process, reducing replacement frequency. In the event of magnetic failure, the positive pressure valve disc 3 or the negative pressure valve disc 7 can still fall back under its own weight. The first magnetic attractor 13 and the second magnetic attractor 17, made of easily magnetically attracted metal material, ensure absolute reliability during the active control phase, thus enhancing magnetic efficiency and system reliability. Material optimization ensures that the positive pressure valve disc 3 or the second negative pressure valve disc 7 can be instantly attracted even under adhesive conditions, preventing tank accidents.

[0055] Optionally, the pressure sensor 9, the first magnetic attractor 13, and the second magnetic attractor 17 are all explosion-proof. The explosion-proof design prevents the risk of explosion caused by electrical sparks or high temperatures. In petrochemical storage tank environments, flammable vapors may leak; explosion-proof components meet industry safety standards, eliminating potential ignition sources. The pressure sensor 9 is installed on the upper flange connection pipe of the positive pressure valve housing 1, directly contacting the interior of the storage tank. Its explosion-proof characteristics ensure that it will not fail under high pressure or vacuum conditions. Under extreme conditions (such as rapid pressure changes), the explosion-proof sensor can transmit data accurately in real time, avoiding control delays caused by false alarms or failures, and increasing system reliability. The explosion-proof design of the first magnetic attractor 13 works in conjunction with the first magnetic force generating element 10, and the explosion-proof design of the second magnetic attractor 17 works in conjunction with the second magnetic force generating element 15 to ensure that no sparks are generated even under adhesive or high-load conditions.

[0056] The pressure sensor 9, the first magnetic attracting element 13 and the second magnetic attracting element 17, as well as the first switch 12, the second switch 16 and the control mechanism 14 are integrated into an explosion-proof structure, ensuring the safety of the entire control chain and avoiding single-point failures. This significantly improves the safety of the electric automatic control breather valve in flammable environments, prevents explosion accidents through explosion-proof design, and ensures the long-term stable operation of the storage tank.

[0057] Furthermore, when the first lifting mechanism 20 moves down to its position, the distance between the bottom surface of the first magnetic force generating member 10 and the top surface of the first magnetic attracting member 13 is 10mm to 300mm. And / or, when the second lifting mechanism 21 moves down to its position, the distance between the bottom surface of the second magnetic force generating member 15 and the top surface of the second magnetic attracting member 17 is 10mm to 300mm.

[0058] A spacing range of 10mm to 300mm ensures optimal electromagnetic force strength, optimizes magnetic attraction efficiency, and guarantees rapid rise of the positive pressure valve disc 3 and negative pressure valve disc 7. This range covers the needs of tank pressure fluctuations (such as when the positive pressure opening pressure is at a set value) and still provides sufficient magnetic force even in cases of adhesion. The spacing setting prevents the positive pressure valve disc 3 or negative pressure valve disc 7 from getting stuck during retraction; the lower limit of 10mm ensures sensitive opening and closing response, while the upper limit of 300mm prevents opening delays caused by weakened attraction. In short, precise spacing control optimizes magnetic force transmission efficiency and system reliability, ensuring rapid and long-term stable response of the breather valve.

[0059] Optionally, the weight of the negative pressure valve disc 7 is 1 to 3 times the negative pressure opening pressure. Therefore, even if both the control mechanism 14 and the pressure sensor 9 fail, external pressure can still open the negative pressure valve disc 7, achieving the effect of opening the negative pressure valve seat 6. The entire structure reverts to mechanical opening and closing, ensuring that the negative pressure valve seat 6 can be opened smoothly under any circumstances. Components such as the second magnetic force generating element 15, the second magnetic attraction element 17, the pressure sensor 9, and the control mechanism 14 ensure the precise opening and closing of the negative pressure valve seat 6, while the weight of the negative pressure valve disc 7, being 1 to 3 times the negative pressure opening pressure, ensures safe and reliable operation even if the aforementioned components fail. Furthermore, complete sealing with zero leakage before reaching the opening pressure can be achieved, enabling a negative pressure opening pressure of 0 Pa, effectively preventing tank collapse accidents.

[0060] Optionally, the weight of the positive pressure valve disc 3 is 1 to 3 times the positive pressure opening pressure. Therefore, when both the control mechanism 14 and the pressure sensor 9 fail, the pressure within the tank itself can still push the positive pressure valve disc 3 open, achieving the effect of opening the positive pressure valve seat 2. The entire structure reverts to mechanical opening and closing, ensuring that the positive pressure valve seat 2 can be opened smoothly under any circumstances. Components such as the first magnetic force generating element 10, the first magnetic attracting element 13, the pressure sensor 9, and the control mechanism 14 ensure the precise opening and closing of the positive pressure valve seat 2, while the weight of the positive pressure valve disc 3, being 1 to 3 times the positive pressure opening pressure, ensures safe and reliable operation even if the aforementioned components fail. Furthermore, complete sealing with zero leakage before reaching the opening pressure can be achieved, effectively preventing tank bottoming accidents.

[0061] This utility model provides a method for using the above-mentioned electrically operated automatic control breathing valve, including:

[0062] Pressure sensor 9 measures the pressure value of the storage tank in real time and transmits the pressure value to the control mechanism 14.

[0063] When the pressure value is equal to or greater than the opening pressure of the positive pressure valve disc 3, the first lifting mechanism 20 drives the first magnetic force generating element 10 to move down, the control mechanism 14 controls the first switch 12 to connect, and the power supply 11 supplies power to the first magnetic force generating element 10.

[0064] The first magnetic force generating component 10 generates magnetic attraction force, which attracts the first magnetic attracting component 13. Then, the first lifting mechanism 20 rises and drives the first magnetic attracting component 13 to rise. The first magnetic attracting component 13 drives the positive pressure valve disc 3 to rise, and the positive pressure valve seat 2 is opened to achieve exhaust pressure reduction.

[0065] When the pressure value is less than the opening pressure of the positive pressure valve disc 3, the first lifting mechanism 20 drives the first magnetic force generating element 10 to move down, the control mechanism 14 controls the first switch 12 to open, and the power supply 11 stops supplying power to the first magnetic force generating element 10.

[0066] The magnetic force of the first magnetic force generating component 10 gradually decreases until it stops generating magnetic force. The first magnetic attraction component 13 and the positive pressure valve plate 3 gradually fall back. The positive pressure valve plate 3 closes the positive pressure valve seat 2. Then the first lifting mechanism 20 rises and drives the first magnetic force generating component 10 to rise.

[0067] Furthermore, the usage of the electrically operated automatic control breathing valve also includes:

[0068] When the pressure value is less than or equal to the opening pressure of the negative pressure valve disc 7, the second lifting mechanism 21 drives the second magnetic force generating element 15 to move down, the control mechanism 14 controls the second switch 16 to connect, and the power supply 11 supplies power to the second magnetic force generating element 15.

[0069] The second magnetic force generating component 15 generates magnetic attraction force, which attracts the second magnetic attracting component 17. Then, the second lifting mechanism 21 rises and drives the second magnetic attracting component 17 to rise. The second magnetic attracting component 17 drives the negative pressure valve disc 7 to rise, and the negative pressure valve seat 6 is opened, thereby realizing the intake pressure reduction.

[0070] When the pressure value is greater than the opening pressure of the negative pressure valve disc 7, the second lifting mechanism 21 drives the second magnetic force generating element 15 to move down, the control mechanism 14 controls the second switch 16 to open, and the power supply 11 stops supplying power to the second magnetic force generating element 15.

[0071] The magnetic force of the second magnetic force generating component 15 gradually decreases until it stops generating magnetic force. The second magnetic attraction component 17 and the negative pressure valve plate 7 gradually fall back. The negative pressure valve plate 7 closes the negative pressure valve seat 6. Then, the second lifting mechanism 21 drives the second magnetic force generating component 15 to rise.

[0072] Currently, gravity-type mechanical breather valves used in the domestic market mainly have the following problems: First, there is a leakage stroke. According to the SY / T0511—2024 standard "Accessories for Vertical Cylindrical Welded Steel Storage Tanks", although the leakage pressure detection point is increased from 75% to 85% of the set pressure, there is still a leakage stroke of 15% of the set pressure. Second, they do not have anti-adhesion and anti-freezing functions. Third, the boost pressure is not easy to control. Fourth, the lowest negative pressure opening pressure can only be set at -295Pa. If the negative pressure opening pressure is reduced, the sealing performance cannot be guaranteed due to the limitations of the structural principle. Fifth, there is no remote monitoring function, resulting in a large workload for inspection and maintenance. Sixth, it is impossible to count the amount of gas discharged from the tank each time it is opened.

[0073] The electrically operated automatic control breather valve of this application embodiment can effectively solve the above-mentioned problems. Its working principle is as follows: First, the weight of the positive pressure valve disc is made to reach 1 to 3 times the positive pressure opening pressure, and the weight of the negative pressure valve disc is made to reach 1 to 3 times the negative pressure opening pressure. The purpose is to reduce the leakage stroke of the gravity mechanical breather valve to zero. Furthermore, if the electrical control system of this electrically operated automatic control breather valve malfunctions, it will automatically switch to a normal gravity mechanical breather valve (with an alarm indicating maintenance). The maximum valve disc configuration is only 1.2 times the opening pressure, which is still within the safe operating pressure range of the storage tank, thus achieving the inherent safety of the storage tank's operation. Second, because this electrically operated automatic control breather valve opens by applying electromagnetic attraction when the opening pressure is reached, it has a certain anti-fouling and anti-freezing function. Third, this electrically operated automatic control breather valve... When the opening pressure is reached, the valve disc opens and reaches the rated ventilation volume, effectively reducing the pressure boost of the breather valve. In particular, under vacuum negative pressure, the valve disc can be set to open at zero negative pressure, and the rated ventilation volume is reached immediately upon opening. This can prevent tank collapse accidents caused by heavy rain in summer. Fourth, this electric automatic control breather valve can realize wired and wireless monitoring at both near and far distances, view historical data, and perform automatic detection as needed, greatly reducing the workload of detection and maintenance. Fifth, it can check the amount of medium consumed from the tank each time it is opened.

[0074] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0075] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. An electrically operated automatic control breathing valve, characterized in that, It includes a positive pressure valve housing, a positive pressure valve seat, a positive pressure valve disc, a positive pressure valve cover, a negative pressure valve housing, a negative pressure valve seat, a negative pressure valve disc, a negative pressure valve cover, a pressure sensor, a first magnetic force generating element, a first lifting mechanism, a power supply, a first switch, a first magnetic attracting element, a flow meter, and a control mechanism; The bottom end of the positive pressure valve body is located in the storage tank; The positive pressure valve seat is engaged with the positive pressure valve body; The positive pressure valve disc is disposed on the positive pressure valve seat; The positive pressure valve cover is disposed on the top of the positive pressure valve housing; The negative pressure valve housing is connected to the positive pressure valve housing; The negative pressure valve seat is engaged with the negative pressure valve body; The negative pressure valve disc is disposed on the negative pressure valve seat; The negative pressure valve cover is disposed on the top of the negative pressure valve housing; The pressure sensor is disposed on the side wall between the positive pressure valve seat and the storage tank; The first lifting mechanism is inserted into the positive pressure valve cover; The first magnetic force generating component is disposed at the bottom of the first lifting mechanism; The power supply is sequentially connected to the first switch, the first lifting mechanism, and the first magnetic force generating component; The first magnetic attracting element is fixed to the top surface of the positive pressure valve disc; The first switch and the pressure sensor are both electrically connected to the control mechanism; The flow meter is installed at the positive pressure outlet.

2. The electrically operated automatic control breathing valve according to claim 1, characterized in that, It also includes a second magnetic force generating component, a second lifting mechanism, a second switch, and a second magnetic attracting component; The second lifting mechanism is inserted into the negative pressure valve cover; The second magnetic force generating component is disposed at the bottom of the second lifting mechanism; The power supply is sequentially connected to the second switch, the second lifting mechanism, and the second magnetic force generating component; The second magnetic attracting element is fixed to the top surface of the negative pressure valve disc; The second switch is electrically connected to the control mechanism.

3. The electrically operated automatic control breathing valve according to claim 2, characterized in that, The first magnetic force generating element and / or the second magnetic force generating element are magnetic coils.

4. The electrically operated automatic control breathing valve according to claim 2 or 3, characterized in that, The first magnetic attracting element and / or the second magnetic attracting element are made of a metal material with easy magnetic attraction.

5. The electrically operated automatic control breathing valve according to claim 2, characterized in that, The pressure sensor, the first magnetic attractor, and the second magnetic attractor are all explosion-proof.

6. The electrically operated automatic control breathing valve according to claim 2, characterized in that, When the first lifting mechanism moves down to its position, the distance between the bottom surface of the first magnetic force generating component and the top surface of the first magnetic attracting component is 10mm~300mm. And / or, when the second lifting mechanism moves down to its position, the distance between the bottom surface of the second magnetic force generating component and the top surface of the second magnetic attracting component is 10mm~300mm.

7. The electrically operated automatic control breathing valve according to claim 2, characterized in that, The weight of the negative pressure valve disc is 1 to 3 times the negative pressure opening pressure.

8. The electrically operated automatic control breathing valve according to claim 1, characterized in that, The weight of the positive pressure valve disc is 1 to 3 times the positive pressure opening pressure.

Images