Oil and gas recovery valve with on-off monitoring

Abstract

The utility model discloses a kind of oil gas recovery valve with opening and closing monitoring, belong to oil gas recovery valve technical field, including valve body, valve rod, valve flap, spring, gland, bonnet and inductive device;Its innovation lies in that inductive device includes inductive element and inductor, inductive element is embedded in valve rod head, inductor is installed in gland, and the opening and closing state of valve flap is monitored by the position change of non-contact inductive element.The utility model can accurately monitor valve flap state in real time, structure is stable, good sealing, can guarantee that oil gas recovery system is safely and efficiently operated.

Description

Technical Field

[0001] This application relates to the field of oil and gas recovery valve technology, specifically to an oil and gas recovery valve with opening and closing monitoring. Background Technology

[0002] In the storage and transportation of oil and gas, oil and gas recovery systems have become essential facilities to reduce energy waste and environmental pollution caused by oil and gas volatilization. The oil and gas recovery valve is a key component in this system, regulating oil and gas pressure and controlling the flow direction. Through the opening and closing of the valve disc, it balances the pressure inside and outside the storage tank, ensuring the safe operation of unloading and refueling processes. Simultaneously, it recovers volatilized oil and gas to designated devices, achieving the dual goals of environmental protection and energy conservation.

[0003] However, existing oil and gas recovery valves generally lack effective means of monitoring the opening and closing status of the valve disc. They can usually only rely on periodic manual inspections or indirect changes in system pressure to infer the working status of the valve disc. They cannot directly and accurately obtain specific position information such as whether the valve disc is open, closed, or stuck. Once a malfunction occurs, it may lead to problems such as oil and gas leakage and system pressure imbalance, which not only affects the oil and gas recovery efficiency but also poses safety hazards.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0005] The purpose of this application is to provide an oil and gas recovery valve with opening and closing monitoring, which has the function of real-time monitoring of the valve disc opening and closing status.

[0006] This application provides an oil and gas recovery valve with opening and closing monitoring, the technical solution of which is as follows:

[0007] It includes a recovery valve and a sensing device; wherein, the recovery valve includes a valve body, a valve stem, a valve disc, and a pressure cap; the valve body is provided with an inlet, an outlet, and a piston chamber; the valve disc abuts against the inlet; the valve stem is movably disposed in the piston chamber, with a shoulder at its upper end and the valve disc connected at its lower end; the pressure cap is installed at the piston chamber port;

[0008] The sensing device includes a sensing element and a sensor; the sensing element is fixedly connected to the valve stem and moves synchronously with the valve stem; the sensor is fixedly installed on the gland and monitors the opening and closing status of the valve disc by detecting the position change of the sensing element.

[0009] Furthermore, this application proposes that the sensor is a Hall displacement sensor and the sensing element is a magnetic block; the Hall displacement sensor is fixedly installed in the sensor mounting groove provided on the gland, with its detection end facing the magnetic block; the magnetic block is embedded in the sensing element mounting groove provided on the valve stem shoulder; the Hall displacement sensor monitors the opening and closing state of the valve disc by sensing the change in the magnetic field position of the magnetic block.

[0010] Furthermore, this application also proposes that it includes a valve cap, which is installed on the upper end face of the gland and fixedly connected to the valve body by bolts; the valve cap is provided with a lead-in port, through which the signal line of the Hall displacement sensor passes; the signal line is connected to a signal processing terminal externally placed on the valve body, and the signal processing terminal is used to convert the magnetic field position change signal detected by the Hall displacement sensor into an electrical signal of valve disc opening and closing status.

[0011] Furthermore, this application also proposes that the signal processing terminal integrates an alarm unit, which can issue an alarm signal when an abnormal opening or closing state of the valve disc is detected.

[0012] Furthermore, this application also proposes that the valve body sidewall is provided with an air inlet, an auxiliary air inlet and an exhaust port; the air inlet is externally connected to an air inlet connector and communicates with the upper chamber formed by the gland, valve stem shoulder and piston chamber wall; the auxiliary air inlet is externally connected to an auxiliary air inlet connector and communicates with the piston chamber; the exhaust port communicates with the piston chamber and the outside atmosphere.

[0013] Furthermore, this application also proposes that the bottom of the piston chamber is provided with a through hole, and the bottom of the piston chamber is provided with a shoulder surface around the through hole; the lower end of the valve stem passes through the through hole and is fixedly connected to the center of the valve disc by a locking nut, and an anti-loosening washer is provided between the locking nut and the valve disc; it also includes a spring, which is sleeved on the outside of the valve stem, with one end abutting against the shoulder surface and the other end abutting against the bottom surface of the shoulder.

[0014] Furthermore, this application also proposes that a groove be provided at the contact point between the edge of the valve disc and the feed inlet, and an elastic sealing ring be provided in the groove.

[0015] Furthermore, this application also proposes that a first annular groove is provided at the contact point between the side of the shoulder and the inner wall of the piston cavity, and a first elastic sealing ring is fitted inside the first annular groove;

[0016] A second annular groove is provided at the contact surface between the side of the gland and the inner wall of the piston chamber, and a second elastic sealing ring is provided in the second annular groove;

[0017] A third annular groove is provided at the contact surface between the top surface of the gland and the valve cap, and a third elastic sealing ring is provided in the third annular groove.

[0018] Furthermore, this application also proposes that an assembly flange be provided at one end of the feed inlet, with multiple assembly holes evenly distributed circumferentially on the assembly flange; and a conical filter screen be provided at the discharge outlet, with the bottom snap-fit ​​part of the conical filter screen snapping into the groove on the inner wall of the discharge outlet, and the conical surface facing the inside of the valve body.

[0019] The beneficial effect of this application is that it provides an oil and gas recovery valve with opening and closing monitoring, which monitors the valve stem displacement change in real time through a sensing device and accurately feeds back the valve disc opening and closing status. This effectively solves the problems of lagging monitoring and insufficient reliability of traditional oil and gas recovery valves, and has the advantages of real-time monitoring, timely fault warning and high operational stability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0021] Figure 1 This is a cross-sectional structural diagram of an embodiment of the application;

[0022] Figure 2 This is a three-dimensional structural diagram of an embodiment of the application;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of an embodiment of the application;

[0024] Figure 4 for Figure 1 Enlarged view of a portion of region A in the middle;

[0025] Figure 5 This is a schematic diagram of the capping structure according to an embodiment of the application;

[0026] The following are the labeling elements in the figure:

[0027] 1. Valve body; 11. Inlet; 12. Outlet; 13. Piston chamber; 131. Shoulder surface; 132. Upper chamber; 133. Lower chamber; 14. Oil-gas passage; 15. Through hole; 16. Air inlet; 17. Auxiliary air inlet; 18. Exhaust port; 19. Assembly flange; 191. Assembly hole; 2. Valve stem; 21. Shoulder; 211. First annular groove; 212. First elastic sealing ring; 213. Sensing element 1. Mounting slot; 24. Locking nut; 25. Anti-loosening washer; 3. Valve disc; 31. Groove; 32. Elastic sealing ring; 4. Spring; 5. Pressure cap; 51. Sensor mounting slot; 52. Second annular groove; 53. Second elastic sealing ring; 54. Third annular groove; 55. Third elastic sealing ring; 6. Valve cap; 61. Lead wire port; 7. Sensing device; 71. Sensing element; 72. Sensor; 9. Conical filter screen. Detailed Implementation

[0028] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In traditional oil and gas recovery systems, real-time monitoring of valve opening and closing status has technical limitations. Existing technology relies on manual inspection to determine valve operation, which cannot promptly detect abnormal displacements caused by valve jamming or sealing failure. Due to the lack of a precise displacement feedback mechanism, oil and gas recovery valves are prone to valve movement obstruction due to oil buildup or mechanical wear during long-term operation, but such faults are difficult to identify in a timely manner. When the valve is in an abnormal opening position, the flow cross-sectional area of ​​the oil and gas passage deviates from the preset value, leading to inaccurate system pressure regulation, which in turn causes a decrease in oil and gas recovery efficiency and pressure fluctuations within the tank exceeding the safety threshold.

[0031] Please refer to the following for details. Figure 1 This application proposes an oil and gas recovery valve with opening and closing monitoring, including a recovery valve and a sensing device 7. The recovery valve includes a valve body 1, a valve stem 2, a valve disc 3, and a pressure cap 5. The valve body 1 has an inlet 11, an outlet 12, and a piston chamber 13. The valve disc 3 is sealed against the inlet 11. The upper end of the valve stem 2 has a shoulder 21, and the lower end is fixedly connected to the valve disc 3. The pressure cap 5 is installed at the port of the piston chamber 13, and the shoulder 21 slides against the inner wall of the piston chamber 13 under air pressure. The valve also includes a sensing device 7. A sensing element 71 is fixed to the valve stem 2 and moves synchronously with it. A sensor 72 is fixed to the pressure cap 5. The axial displacement information of the valve stem 2 is obtained by detecting the position change of the sensing element 71, reflecting the opening and closing state of the valve disc 3.

[0032] It can be understood that valve stem 2, as a transmission component, is used to transmit the displacement of valve disc 3, and can be made of stainless steel. Valve disc 3 is used to control the opening and closing of feed inlet 11. The gland 5 is the end sealing component of piston chamber 13, used to form an independent air chamber. The sensing element refers to a magnetic or conductive body rigidly connected to the valve stem, and can be implemented using a permanent magnet or metal target. Its displacement trajectory is synchronized with the axial movement of the valve stem. The sensor refers to a non-contact displacement detection device, and can be implemented using a Hall sensor or an inductive proximity switch. Its installation position corresponds to the movement trajectory of the sensing element. The axial displacement information of the valve stem refers to the linear distance of the valve stem relative to the gland, which can be converted into an electrical signal output through changes in magnetic field strength or inductance. The sliding fit of the piston chamber inner wall refers to the formation of a sealed sliding pair between the shoulder and the chamber, allowing the valve stem to move smoothly under air pressure.

[0033] As a preferred embodiment, please refer to Figures 1 to 5The specific implementation of the scheme in this application is as follows: An oil and gas recovery valve with opening and closing monitoring includes a valve body 1, a valve stem 2, a valve disc 3, a spring 4, a pressure cap 5, a valve cap 6, and a sensing device 7. The valve body 1 includes an inlet 11 and an outlet 12. A piston chamber 13 and an oil and gas passage 14 are provided inside the valve body 1. A through hole 15 is provided at the bottom of the piston chamber 13, and a shoulder surface 131 is provided around the through hole 15 at the bottom of the piston chamber 13. A shoulder 21 is provided at the upper end of the valve stem 2. The oil and gas passage 14 is used to connect the inlet 11 to an external pipeline. The valve stem 2 is movably disposed in the piston chamber 13, and its lower end passes through the through hole 15. It is fixedly connected to the center of the valve disc 3 by a locking nut 24, and an anti-loosening washer 25 is provided between the locking nut 24 and the valve disc 3. The valve disc 3 abuts against the inlet 11. A groove 31 is provided at the contact point between the edge of the valve disc 3 and the inlet 11 of the valve body 1, and an elastic sealing ring 32 is provided in the groove. Spring 4 is sleeved on the outside of valve stem 2, with one end abutting against shoulder surface 131 and the other end abutting against bottom surface of shoulder 21. Pressure cap 5 is installed at the port of piston chamber 13 and cooperates with the top surface of shoulder 21 and the wall of piston chamber 13 to form upper chamber 132. Valve cap 6 is installed on the upper end face of pressure cap 5 and is fixedly connected to valve body 1 by bolts. Sensing device 7 includes sensing element 71 and sensor 72. Sensing element 71 is fixedly connected to valve stem 2 and embedded in sensing element mounting groove 213 at its head. Sensor 72 is fixedly installed in sensor mounting groove 51 on the upper end face of pressure cap 5, and monitors the opening and closing state of valve disc 3 by sensing changes in the position of sensing element 71.

[0034] It is understood that the valve body 1, as the main structure, has a piston chamber 13 and an oil-gas passage 14 to accommodate internal components and form an oil-gas flow path. It can be made of cast or machined metal. The through hole 15 at the bottom of the piston chamber 13 guides the movement of the valve stem 2. The valve stem 2, as a transmission component, transmits the displacement of the valve disc 3. It can be made of stainless steel. The anti-loosening washer 25 prevents the locking nut 24 from loosening due to vibration, ensuring the connection stability between the valve disc 3 and the valve stem 2. The valve disc 3 controls the opening and closing of the feed inlet 11. The elastic sealing ring 32 on the valve disc 3 is made of rubber or polytetrafluoroethylene. The groove 31 fixes the position of the sealing ring, ensuring the sealing performance of the valve disc 3 when closed and preventing oil-gas leakage. The spring 4, as an elastic element, applies preload to reset the valve disc 3. It can be implemented using a helical compression spring 4. The shoulder surface 131 and the bottom surface of the shoulder 21 limit the compression stroke of the spring 4, maintaining the normal seal between the valve disc 3 and the feed inlet 11. The gland 5 is the end seal of the piston chamber 13, used to form an independent gas chamber. The upper chamber 132 is used to introduce external gas to regulate the pressure balance inside the valve body 1. The valve cap 6 is an external protective structure used to protect internal components. It can be implemented using a metal shell, and bolted connections ensure the stability of the valve cap 6 and the valve body 1. The sensing device 7 is used to monitor the displacement of the valve disc 3 in real time. It can be implemented using a Hall displacement sensor and a magnetic block. The sensing element mounting slot 213 and the sensor mounting slot 51 respectively fix the positions of the magnetic block and the sensor. The magnetic field change signal is converted into valve disc 3 displacement information to achieve accurate feedback of the opening and closing status.

[0035] Through the above-described scheme, this application achieves precise monitoring of the opening and closing status of the oil and gas recovery valve disc. By directly integrating the sensing element into the shoulder 21 at the upper end of the valve stem, the displacement signal is ensured to be synchronized with the movement of the valve disc 3, eliminating the signal lag problem caused by the installation gap of traditional external sensors. The non-contact magnetic induction technology avoids wear caused by physical contact, improving the accuracy and stability of monitoring. This design can promptly capture abnormal displacements caused by valve disc 3 jamming or sealing failure, effectively solving the problem that traditional oil and gas recovery valves cannot monitor the status of valve disc 3 in real time. By monitoring the opening and closing status of valve disc 3 in real time, abnormal situations such as valve disc 3 jamming and sealing failure can be detected and dealt with in a timely manner, preventing oil and gas leakage and system pressure imbalance, and improving the operational safety and recovery efficiency of the oil and gas recovery system.

[0036] Further, please refer to Figure 1 and Figure 4 This application proposes that it also includes a valve cap 6, which is installed on the upper end face of the pressure cover 5 and fixedly connected to the valve body 1 by bolts; the valve cap 6 is provided with a lead-in port 61, through which the signal line of the Hall displacement sensor passes; the signal line is connected to a signal processing terminal externally placed on the valve body, and the signal processing terminal is used to convert the magnetic field position change signal detected by the Hall displacement sensor into an electrical signal of valve disc opening and closing status.

[0037] It can be understood that the lead-in port 61 refers to a through-hole structure that penetrates the side wall or top of the valve cap 6, providing a path for the signal line to extend from inside the valve cap 6 to external devices. The signal processing terminal refers to an electronic device installed independently of the valve body 1. Specifically, it can be implemented using an industrial controller with signal conversion function, such as a programmable logic controller or an embedded microcontroller, used to receive the analog signal output by the Hall displacement sensor and perform digital processing.

[0038] Specifically, after the Hall displacement sensor detects the change in the magnetic field generated by the movement of the magnetic block with valve stem 2, it converts the continuously changing magnetic field signal into a voltage signal and transmits it to the signal processing terminal via a shielded cable. The signal processing terminal has an internal signal conditioning circuit that filters and amplifies the voltage signal, and then converts the analog signal into a digital signal via an analog-to-digital converter. The digital signal is input to a logic judgment unit and compared with preset opening and closing thresholds. When the signal exceeds the threshold range, a corresponding valve disc 3 status electrical signal is generated. This electrical signal can be transmitted to an external monitoring system via a communication interface to achieve real-time monitoring of the valve disc 3's opening and closing status.

[0039] Further, please refer to Figure 4 This application proposes to use a Hall displacement sensor as the sensor 72 and a magnetic block as the sensing element 71. The Hall displacement sensor is fixedly installed in the sensor mounting groove 51 by bolts, with its detection end facing the magnetic block. The magnetic block is embedded in the sensing element mounting groove 213 and moves synchronously with the valve stem 2. The change in distance between the Hall displacement sensor and the magnetic block corresponds to different opening and closing positions of the valve disc 3. The Hall displacement sensor monitors the opening and closing state of the valve disc 3 by sensing the change in the magnetic field position of the magnetic block.

[0040] As can be understood, a Hall displacement sensor is a sensor that measures the positional changes of a magnetic object based on the Hall effect principle. Specifically, it can be implemented using a structure that integrates a linear Hall element with a signal processing circuit. Its detection end outputs an electrical signal by detecting changes in magnetic field strength. The magnetic block refers to a block of metallic material with permanent magnet properties, specifically neodymium iron boron magnets or samarium cobalt magnets. Its magnetic field distribution produces a identifiable gradient as displacement changes. "Detection end facing the magnetic block" means that the sensitive area of ​​the Hall displacement sensor and the magnetic block are on the same axis. This can be achieved by adjusting the bolt tightening position to keep the sensor and magnetic block parallel and aligned.

[0041] Specifically, when valve stem 2 drives valve disc 3 to move, the magnetic block moves axially synchronously with valve stem 2. The Hall displacement sensor detects the change in the magnetic field strength of the magnetic block and outputs a voltage signal proportional to the displacement. The signal processing terminal receives the voltage signal and determines whether valve disc 3 is in an open, closed, or intermediate state based on a preset threshold. The signal processing terminal compares the voltage signal with a preset range; if it exceeds the threshold, an alarm unit is triggered.

[0042] Furthermore, this application proposes that the signal processing terminal integrates an alarm unit, which can issue an audible and visual alarm signal when an abnormal opening or closing state of valve disc 3 is detected.

[0043] It is understandable that the alarm unit refers to the module that emits audible and visual signals. Specifically, it can be implemented by combining a buzzer and an LED light. It is used to trigger an alarm when the opening and closing state of valve disc 3 deviates from a preset threshold, such as when valve disc 3 is stuck or the seal fails, an immediate warning is issued.

[0044] Specifically, sensor 72 detects changes in the position of sensing element 71 in real time and transmits the signal to the signal processing terminal. The signal processing terminal analyzes the received signal, and if it detects that the opening or closing position of valve disc 3 exceeds a preset range, it determines it to be an abnormal state and immediately sends a command to the alarm unit. Upon receiving the command, the alarm unit simultaneously activates an audible and visual alarm, such as a continuous buzzer and high-frequency flashing LEDs, to remind the operator to handle the fault promptly.

[0045] Further, please refer to Figures 1 to 5 This application proposes that the valve body 1 has an air inlet 16, an auxiliary air inlet 17, and an exhaust port 18 on its side wall. The air inlet 16 is externally connected to an air inlet connector and communicates with the upper chamber 132 formed by the pressure cap 5, the shoulder 21, and the inner wall of the piston chamber 13. The auxiliary air inlet 17 is externally connected to an auxiliary air inlet connector and communicates with the lower chamber 133 formed by the piston chamber 13 and the shoulder 21. The auxiliary air inlet 17 serves as an emergency air intake channel, and can replenish air to the lower chamber 133 when necessary to avoid excessive pressure difference between the upper and lower chambers, which could lead to sealing failure. The exhaust port 18 connects the piston chamber 13 to the outside atmosphere to balance the pressure in the piston chamber 13.

[0046] It is understood that the air inlet 16 is connected to an external air source through an air inlet connector to ensure that oil and gas can enter the upper chamber 132 normally; the exhaust port 18 is connected to the outside atmosphere through the piston chamber 13 to avoid excessively high or low internal pressure. The air inlet 16, the auxiliary air inlet 17 and the exhaust port 18 are distributed along the side wall of the valve body 1, located at different heights, and are connected to the corresponding chambers through internal channels.

[0047] Specifically, the main air inlet 16 is connected to the upper chamber 132. Oil and gas enter the valve body 1 through the air inlet connector, increasing the pressure in the upper chamber 132 and pushing the valve stem 2 downward, thereby opening the valve disc 3. At this time, the gas in the lower chamber 133 is discharged through the exhaust port 18. When the pressure at the main air inlet 16 is too high, causing an excessive pressure difference between the upper chamber 132 and the lower chamber 133, the auxiliary air inlet 17 introduces external oil and gas through the auxiliary air inlet connector to balance the pressure in the two chambers and ensure continuous system operation. The exhaust port 18 is connected to the outside atmosphere through the lower chamber 133 and regulates the internal pressure during the opening and closing of the valve disc 3 to prevent sealing failure or oil and gas leakage caused by abnormal pressure. The air inlet 16 and the auxiliary air inlet 17 use connectors of the same specification for easy switching. By setting up a backup air inlet channel and a pressure regulation structure, the system's operational stability is improved, and the risk of failure is significantly reduced.

[0048] Further, please refer to Figure 1 This application proposes that the bottom of the piston chamber 13 is provided with a through hole 15, and the bottom of the piston chamber 13 is provided with a shoulder surface 131 around the through hole 15; the lower end of the valve stem 2 passes through the through hole 15 and is fixedly connected to the center of the valve disc 3 by a locking nut 24, and an anti-loosening washer 25 is provided between the locking nut 24 and the valve disc 3; it also includes a spring 4, which is sleeved on the outside of the valve stem 2, with one end abutting against the shoulder surface 131 and the other end abutting against the bottom surface of the shoulder 21.

[0049] It can be understood that the through hole 15 and the shoulder surface 131 form an axial guiding structure for the valve stem 2, restricting the radial displacement of the valve stem 2; the locking nut 24 cooperates with the anti-loosening washer 25 to fix the connection between the valve stem 2 and the valve disc through mechanical locking, preventing the threads from loosening; the spring 4 is sleeved on the outside of the valve stem 2, using its elastic deformation to provide preload force, pushing the shoulder 21 to drive the valve stem 2 to reset. The design of the lower end of the valve stem 2 passing through the through hole 15 allows the valve stem 2 to move freely along the axial direction, while the inner wall of the through hole 15 and the outer wall of the valve stem 2 have a clearance fit to avoid motion interference. The two ends of the spring 4 abut against the shoulder surface 131 and the bottom surface of the shoulder 21 respectively, forming a compressed state. When the valve disc 3 is opened, the spring is compressed and stores energy; when the valve disc 3 is closed, the spring 4 releases energy to assist in reset. An anti-loosening washer 25 is set between the locking nut 24 and the valve disc 3 to increase frictional resistance and prevent the nut from loosening due to vibration or impact.

[0050] Please refer to Figure 1 This application further proposes that a groove 31 is provided at the contact point between the edge of the valve disc 3 and the feed inlet 11, and an elastic sealing ring 32 is provided in the groove.

[0051] It is understood that the groove 31 is continuously opened circumferentially along the edge of the valve disc 3, and its cross-sectional shape is rectangular or trapezoidal; the elastic sealing ring 32 is made of fluororubber or nitrile rubber, and its cross-sectional shape matches the groove, with its outer diameter exceeding the groove opening plane after installation; when the valve disc 3 is in the closed state, the elastic sealing ring is compressed and undergoes radial deformation, filling the assembly gap between the valve disc and the feed port. When the valve disc 3 is driven by the valve stem 2 to abut against the feed port, the elastic sealing ring 32 is subjected to the axial pressure of the contact surface between the valve disc 3 and the feed port 11, and expands radially outward along the groove to form an annular sealing band.

[0052] Further, please refer to Figure 4 This application proposes that a first annular groove 211 is provided at the contact point between the side of the shoulder 21 and the inner wall of the piston cavity 13, and a first elastic sealing ring 212 is fitted inside the first annular groove 211. A second annular groove 52 is provided at the contact point between the side of the gland 5 and the inner wall of the piston cavity 13, and a second elastic sealing ring 53 is provided inside the second annular groove 52. A third annular groove 54 is provided at the contact point between the top surface of the gland 5 and the valve cap 6, and a third elastic sealing ring 55 is provided inside the third annular groove 54.

[0053] It can be understood that the first annular groove 211 is formed on the side of the shoulder 21, and its position corresponds to the contact area between the valve stem 2 and the piston chamber 13 wall; the first elastic sealing ring 212 is embedded in the first annular groove 211, and its outer diameter is larger than the depth of the groove 31, so that the outer surface of the sealing ring forms an interference fit with the piston chamber 13 wall; the first elastic sealing ring 212 is made of oil-resistant rubber or fluororubber material, has elastic deformation capability, and can adapt to the friction and compression during the axial movement of the valve stem 2. Please refer to... Figure 5 The second annular groove 52 is circumferentially formed along the side of the gland 5. After the second elastic sealing ring 53 is embedded in the groove 31, it forms an interference fit with the inner wall of the piston chamber 13, preventing oil and gas from leaking from the gap between the side of the gland 5 and the piston chamber 13. The third annular groove 54 is circumferentially formed along the top surface of the gland 5. After the third elastic sealing ring 55 is embedded in the groove 31, it forms a compression contact with the lower end face of the valve cap 6, preventing oil and gas from escaping from the gap between the top surface of the gland 5 and the valve cap 6. The two sealing rings correspond to contact surfaces in different directions, working together to achieve bidirectional sealing between the gland 5 and the valve body 1 and the valve cap 6.

[0054] Further, please refer to Figure 1 This application proposes that one end of the feed inlet 11 is provided with an assembly flange 19, and the assembly flange 19 is provided with a plurality of assembly holes 191, which are evenly distributed around the circumference of the assembly flange 19, for fixing the valve body 1 to the oil storage tank by bolts; a conical filter screen 9 is also provided at the discharge port 12, and the bottom of the conical filter screen 9 is provided with a snap-fit ​​part, and the inner wall of the discharge port 12 is provided with a snap-fit ​​groove that matches the snap-fit ​​part. The conical filter screen 9 is snapped into the snap-fit ​​groove through the snap-fit ​​part, and its conical filter screen faces the oil and gas channel 14.

[0055] It is understandable that the assembly flange 19 forms a symmetrical bolt fixing structure through the circumferentially evenly distributed assembly holes 191, ensuring uniform stress on the connection surface between the valve body 1 and the oil storage tank. The number of assembly holes 191 is configured according to the flange diameter and connection strength requirements, for example, using 8 M12 bolt holes distributed at 45-degree intervals along the flange circumference. The conical surface of the tapered filter screen 9 faces the oil and gas channel 14, which can expand the filtration area and guide impurities to accumulate at the bottom; the engagement of the snap-fit ​​part and the slot enables quick installation and fixing of the filter screen, preventing displacement of the filter screen under fluid impact; the bottom snap-fit ​​structure of the tapered filter screen 9 facilitates disassembly, cleaning, or replacement.

[0056] Specifically, the assembly flange 19 and the end of the inlet 11 are fixedly connected by welding or integral casting. Bolts pass through the assembly holes 191 and engage with the threaded holes of the oil tank flange. Pre-tightening force is applied symmetrically to ensure uniform pressure on the flange connection surface. The circumferentially distributed assembly holes 191 eliminate localized stress concentration and prevent sealing failure due to flange deformation. The conical filter screen 9 is installed inside the outlet 12, its conical surface covering the inlet of the oil and gas channel 14. When oil and gas enter the outlet 12, they are intercepted by the filter screen to remove solid particles. The snap-fit ​​part is embedded in the slot to form a mechanical lock, ensuring the filter screen remains stable under high pressure. The conical structure allows impurities to slide down the inclined surface to the bottom of the filter screen, preventing accumulation on the filter screen surface and clogging. When maintenance is required, the filter screen can be removed by applying axial force to disengage the snap-fit ​​part from the slot. This solution effectively solves the problem of impurity clogging through filter screen structure optimization and snap-fit ​​fixing, while also improving filter screen disassembly and assembly efficiency.

[0057] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An oil and gas recovery valve with opening and closing monitoring, comprising a valve body, a valve stem, a valve disc, and a gland, wherein, The valve body is provided with an inlet, an outlet and a piston chamber. The valve disc is sealed against the inlet. The upper end of the valve stem is provided with a shoulder and the lower end is fixedly connected to the valve disc. The pressure cap is installed at the piston chamber port. The shoulder slides in the piston chamber with the inner wall of the piston chamber under air pressure. The valve body is characterized by further including a sensing device for monitoring the axial displacement of the valve stem. The sensing device includes a sensing element and a sensor; the sensing element is fixedly installed on the valve stem and moves synchronously with the valve stem; the sensor is fixedly installed on the pressure plate, and obtains the axial displacement information of the valve stem by detecting the position change of the sensing element relative to the sensor, thereby reflecting the opening and closing state of the valve disc.

2. The oil and gas recovery valve with opening and closing monitoring according to claim 1, characterized in that, It also includes a valve cap, which is installed on the upper end face of the gland and fixedly connected to the valve body by bolts; the valve cap is provided with a lead wire port, through which the signal wire of the sensor passes and is connected to a signal processing terminal externally placed on the valve body.

3. The oil and gas recovery valve with opening and closing monitoring according to claim 1 or 2, characterized in that, The sensor is a Hall displacement sensor, and the sensing element is a magnetic block; the top surface of the cover that does not come into contact with oil or gas is provided with a sensor mounting groove; the shoulder is provided with a sensing element mounting groove; the magnetic block is embedded in the sensing element mounting groove; the Hall displacement sensor is fixedly installed in the sensor mounting groove, and its detection end faces the magnetic block.

4. The oil and gas recovery valve with opening and closing monitoring according to claim 2, characterized in that, The signal processing terminal integrates an alarm unit, which can issue an alarm signal when an abnormal valve opening / closing state is detected.

5. The oil and gas recovery valve with opening and closing monitoring according to claim 1, characterized in that, The valve body sidewall is provided with an air inlet, an auxiliary air inlet, and an exhaust port; the air inlet is externally connected to an air inlet connector and communicates with the upper chamber formed by the pressure cap, the shoulder, and the inner wall of the piston chamber; the auxiliary air inlet is externally connected to an auxiliary air inlet connector and communicates with the lower chamber formed by the piston chamber and the valve stem shoulder; the exhaust port connects the lower chamber to the outside atmosphere.

6. The oil and gas recovery valve with opening and closing monitoring according to claim 1, characterized in that, The piston chamber has a through hole at the bottom, and a shoulder surface is provided around the through hole at the bottom of the piston chamber; the lower end of the valve stem passes through the through hole and is fixedly connected to the center of the valve disc by a locking nut, and an anti-loosening washer is provided between the locking nut and the valve disc; it also includes a spring, which is sleeved on the outside of the valve stem, with one end abutting against the shoulder surface and the other end abutting against the bottom surface of the shoulder.

7. The oil and gas recovery valve with opening and closing monitoring according to claim 1, characterized in that, A groove is provided at the contact point between the edge of the valve disc and the feed inlet, and an elastic sealing ring is provided in the groove.

8. The oil and gas recovery valve with opening and closing monitoring according to claim 3, characterized in that, A first annular groove is provided where the side of the shoulder contacts the inner wall of the piston chamber, and a first elastic sealing ring is fitted inside the first annular groove. A second annular groove is provided at the contact surface between the side of the pressure cap and the inner wall of the piston chamber, and a second elastic sealing ring is provided in the second annular groove; A third annular groove is provided at the contact surface between the top surface of the gland and the valve cap, and a third elastic sealing ring is provided in the third annular groove.

9. The oil and gas recovery valve with opening and closing monitoring according to claim 1, characterized in that, The feed inlet is provided with an assembly flange at one end, and multiple assembly holes are evenly distributed along the circumference of the assembly flange.

10. The oil and gas recovery valve with opening and closing monitoring according to claim 1, characterized in that, A conical filter screen is provided at the discharge port. The bottom of the conical filter screen is engaged with the groove on the inner wall of the discharge port, and the conical surface faces the inside of the valve body.

Images