An oil and gas recovery valve and tank truck

Abstract

The utility model belongs to the technical field of industrial production and transportation, specifically relates to an oil gas recovery valve and tank wagon, including valve body, ball valve core, valve rod and cylinder, the lateral wall on the export end of valve body is fixed with the positioning axis that extends outward along the direction perpendicular to valve body central axis, the cylinder body of cylinder is fixedly connected in the side portion of valve body export end through positioning axis, the protruding end of valve rod is sleeved with drive arm, the first arm end of drive arm is hinged connection through the pin shaft with the piston rod end of cylinder, the cylinder drives the first arm through its piston rod telescopic drive drive arm and rotates around valve rod axis, further rotates ball valve core through valve rod linkage. The utility model fundamentally solves the structural hidden danger and the problem of inconvenient operation brought by built-in cylinder, realizes the comprehensive breakthrough of oil gas recovery valve in safety, reliability, maintainability and environmental protection, provides efficient, durable technical solution for tank wagon transportation industry.

Description

Technical Field

[0001] This utility model belongs to the technical field of industrial production and transportation, and specifically relates to an oil and gas recovery valve and a tank truck. Background Technology

[0002] In the fields of industrial production and transportation, valves are key components for controlling the flow and direction of fluids, and their performance and reliability directly affect the operating efficiency and safety of the entire system. In particular, in the tank truck transportation industry, oil and gas recovery valves are important devices for controlling oil and gas emissions and recovery, and their design and application are especially important. Currently, most oil and gas recovery valves use a design where the cylinder is built into the valve body. This means the cylinder's actuator (such as the piston) is in direct contact with the medium inside the valve chamber. Although rubber O-rings are used for isolation, rubber materials are prone to aging and failure when in contact with corrosive media for extended periods, resulting in poor corrosion resistance and increasing the risk of media leakage. If the cylinder fails, the medium is highly likely to leak directly into the environment, causing safety hazards and environmental pollution. Furthermore, the cylinder's actuator (such as the piston) can easily carry the medium outside the valve body during operation, wasting the medium and posing health hazards to operators. Because the medium is carried out, operators cannot directly observe the situation inside the valve chamber, increasing the blindness and risk of operation. Due to the limitations of the built-in cylinder and sealing structure, the sealing performance of the valve components cannot often be directly tested during tank pressure tests; the valve components must be disassembled for inspection, increasing workload and affecting the valve's service life and accuracy. Moreover, after the valve is vented, operators cannot directly observe its opening and closing status and must rely on other indirect methods, which reduces the accuracy and timeliness of operation and increases the risk of misoperation.

[0003] Existing technologies include research on the problems of using built-in cylinders in oil and gas recovery valves. For example, patent CN209725398U - an anti-loosening structure for a water circuit ball valve in a sanitation vehicle, connects the ball valve to the cylinder mounting seat by adding a ball valve retainer and a connecting rod. Although the cylinder is externally mounted, it relies on a complex anti-loosening structure (such as the ball valve retainer and connecting rod), resulting in installation redundancy and high maintenance costs. Another example is patent CN111911665A - a three-way pneumatic ball valve, which protects the flange through a sealing mechanism, but the cylinder is still fixed to the top of the valve body, failing to solve the sealing defects of built-in cylinders.

[0004] In summary, existing improvements to oil and gas recovery valves fail to fundamentally resolve the structural hazards and operational inconveniences caused by the built-in cylinder, and still exhibit significant shortcomings in terms of safety, reliability, maintainability, and ease of operation. Therefore, a new technical solution is needed to address these issues. Utility Model Content

[0005] The purpose of this utility model is to provide an oil and gas recovery valve and a tank truck, so as to solve the problem that the current improvement schemes of oil and gas recovery valves proposed in the background art have failed to fundamentally solve the structural hidden dangers and operational inconvenience caused by the built-in cylinder, and still have significant deficiencies in terms of safety, reliability, maintainability and ease of operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an oil and gas recovery valve, comprising a valve body, a ball valve core disposed within the valve body, a valve stem for driving the ball valve core to rotate, and a cylinder. The ball valve core of the valve body and its outlet end form an L-shaped ball valve. A positioning shaft extending outward in a direction perpendicular to the central axis of the valve body is fixed on the outer wall of the outlet end of the valve body. An ear seat is fixed at the end of the cylinder body. The ear seat is vertically sleeved on the end of the positioning shaft, so that the cylinder is fixedly connected to the side of the outlet end of the valve body through the ear seat and the positioning shaft. The extended end of the valve stem is fitted with a drive arm. The drive arm has a central hole that is fitted onto the extended end of the valve stem and connected to a key to transmit torque. It also branches from the central hole to form a first arm and a second arm with an obtuse angle. The end of the first arm is hinged to the end of the piston rod of the cylinder via a pin. The cylinder drives the first arm to rotate around the valve stem axis by extending and retracting its piston rod. This, in turn, causes the valve stem to rotate the ball valve core. A limit plate is fixed on the outer wall of the valve body. The limit plate has a limit boss corresponding to the movement trajectory of the first and second arms.

[0007] Furthermore, a valve seat is provided between the outer wall of the ball valve core and the inner wall of the valve body; a valve seat ring is provided on the outer axial direction of the bottom of the valve seat, and two O-rings A are provided radially between the outer wall of the valve seat ring and the inner wall of the valve body.

[0008] Furthermore, the connecting end of the valve stem is fixedly connected to the ball valve core, and the protruding end of the valve stem passes through the valve body and extends to the outside of the valve body; an O-ring B and a bushing are sequentially provided between the outer side wall of the valve stem and the inner side wall of the through hole of the valve body from the inside to the outside; two nuts are threadedly connected to the protruding end of the valve stem, and the drive arm is clamped and fixed between the two nuts.

[0009] In addition to the above technical solutions, there are also tank trucks equipped with this oil and gas recovery valve.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This utility model significantly improves the overall performance of valves through core improvements such as external cylinder placement, optimized media flow, enhanced operational visibility, simplified maintenance procedures, and a robust drive arm structure. It addresses the pain points of existing improved designs in terms of safety, corrosion resistance, efficiency, and maintenance, resulting in significant economic and social benefits. Specifically: By fixing the cylinder to the side of the valve body outlet end via a positioning shaft, direct contact between the cylinder actuator (piston rod) and the media within the valve cavity is effectively avoided, significantly improving the valve's corrosion resistance and reducing the risk of media leakage. Placing the cylinder actuator outside the valve body optimizes the media flow path, reduces resistance, and improves flow efficiency. It also prevents the media from being carried out of the valve body by the cylinder's movement. Even if the cylinder fails, the media remains sealed within the valve cavity, eliminating environmental pollution and safety hazards. This external cylinder design effectively simplifies the maintenance process, allowing direct testing of valve tightness during tank pressure tests. The valve offers superior sealing performance, eliminating the need to disassemble valve components, reducing maintenance costs, and improving valve lifespan and precision. It employs a drive arm with a central hole and a forked section forming an obtuse angle, hinged to the cylinder piston rod via a pin. This efficiently converts the linear motion of the cylinder piston rod into a 90° rotation of the ball valve core. The obtuse-angle forked structure optimizes the torque transmission path, reduces energy loss, and improves transmission efficiency. The hinged connection enhances structural flexibility and reduces the risk of failure caused by rigid connections. This allows operators to directly observe the valve's opening and closing status, effectively determining whether the valve is functioning correctly, improving operational accuracy and timeliness, and reducing the risk of misoperation.

[0012] 2. This utility model forms an L-shaped ball valve by combining the outlet end of the valve body with the ball valve core, achieving a 90° switching of the medium flow direction. This makes operation more intuitive, reduces the risk of misoperation, reduces medium flow resistance, and improves flow efficiency. It is especially suitable for tank truck loading and unloading scenarios that require rapid switching of flow direction. The design incorporates a valve seat between the ball valve core and the valve body, with a valve seat ring at the bottom of the valve seat. This creates a radial gap between the valve seat ring and the valve body, reducing stress concentration caused by thermal expansion and contraction and lowering the risk of seal failure. Furthermore, two O-rings A are radially positioned between the outer wall of the valve seat ring and the inner wall of the valve body to form a double sealing barrier, effectively preventing medium leakage. This design is particularly suitable for high-pressure or corrosive media environments.

[0013] 3. This utility model adopts an O-ring B and bushing combination design, which effectively isolates the gap between the valve stem and the valve body, preventing the medium from leaking along the valve stem. The design of double nut clamping the drive arm ensures the reliability of cylinder torque transmission and avoids loosening caused by vibration. The limiting boss restricts the rotation range of the drive arm, ensuring that the ball valve core can reach the preset angle every time it is opened and closed, avoiding seal damage caused by excessive rotation. It also effectively prevents the valve from being over-opened or over-closed due to cylinder runaway, thereby ensuring the stable operation of the system.

[0014] 4. This utility model disperses the force on the cylinder piston rod by vertically connecting the ear hole seat to the positioning shaft, reduces the lateral stress on the valve body, avoids deformation caused by long-term use, and also facilitates quick disassembly and assembly of the cylinder, reducing maintenance difficulty.

[0015] 5. This utility model, through the design of L-type ball valve, multiple sealing, limit control, etc., constructs a complete technical solution from media flow to drive control, solving the core problems of traditional built-in cylinder valves such as corrosion resistance, sealing performance, and operation visibility. On this basis, through structural optimization and system integration, it achieves a comprehensive breakthrough in the safety, reliability, maintainability, and environmental protection of the oil and gas recovery valve, providing an efficient and durable technical solution for the tank truck transportation industry, with significant economic benefits and social value. Attached Figure Description

[0016] Figure 1 This is a top view of the oil and gas recovery valve of this utility model.

[0017] Figure 2 for Figure 1 A schematic diagram of the side cross-section structure (excluding the cylinder);

[0018] Figure 3 This is a schematic diagram of the drive arm of this utility model;

[0019] Figure 4 This is a side view of the oil and gas recovery valve of this utility model in the open state.

[0020] Figure 5 This is a side view of the oil and gas recovery valve of this utility model in the closed state.

[0021] The components are: 1. Valve body; 101. Outlet end; 2. Ball valve core; 3. Valve stem; 4. Cylinder; 5. Ear seat; 6. Positioning shaft; 7. Valve seat; 8. Valve seat ring; 9. O-ring A; 10. Nut; 11. O-ring B; 12. Bushing; 13. Drive arm; 1301. Center hole; 1302. First arm; 1303. Second arm; 14. Pin; 15. Limiting plate; 16. Limiting boss. Detailed Implementation

[0022] The following embodiments are used to further illustrate the content of this utility model, and do not limit the application of this utility model. Example 1:

[0023] Please see Figures 1-5 This embodiment provides an oil and gas recovery valve, including a valve body 1, a ball valve core 2 disposed in the valve body 1, a valve stem 3 for driving the ball valve core 2 to rotate, and a cylinder 4. The cylinder body end of the cylinder 4 is fixed with an ear seat 5. The valve body 1 has a positioning shaft 6 fixed on the outer side wall of the outlet end 101, which extends outward in a direction perpendicular to the central axis of the valve body 1. The end of the positioning shaft 6 is vertically sleeved with the ear hole of the ear seat 5, so that the cylinder 4 is fixedly connected to the side of the outlet end 101 through the ear seat 5 and the positioning shaft 6 and is arranged parallel to the valve body 1. The outlet end 101 and the ball valve core 2 form an L-shaped ball valve, realizing a 90° switching of the medium flow direction. A valve seat 7 is disposed between the outer side wall of the ball valve core 2 and the inner side wall of the valve body 1. A valve seat ring 8 is provided on the outer axis of the bottom of the valve seat 7. Two O-rings A9 are provided radially between the outer side wall of the valve seat ring 8 and the inner side wall of the valve body 1 to form a double sealing barrier, effectively preventing medium leakage.

[0024] The ball valve core 2 is fixedly connected to the valve stem 3, and the protruding end of the valve stem 3 passes through the valve body 1 and extends to the outside of the valve body 1, and two nuts 10 are threaded on it. An O-ring B11 and a bushing 12 are provided from the inside to the outside between the outer wall of the valve stem 3 and the inner wall of the through hole of the valve body 1, which effectively isolates the gap between the valve stem 3 and the valve body 1 and prevents the medium from leaking along the valve stem 3.

[0025] A drive arm 13 is clamped and fixed between two nuts 10. The drive arm 13 has a central hole 1301 that is sleeved on the extended end of the valve stem 3 and connected by a key to transmit torque. At the same time, it branches from the central hole 1301 to form a first arm 1302 and a second arm 1303 with an obtuse angle. The end of the first arm 1302 is hinged to the end of the piston rod of the cylinder 4 through a pin 14. The cylinder 4 drives the first arm 1302 to rotate the drive arm 13 around the axis of the valve stem 3 through the extension and retraction of its piston rod. In turn, the valve stem 3 links the ball valve core 2 to rotate. A limit plate 15 is also fixed on the outer wall of the valve body 1. The limit plate 15 has a limit boss 16 that corresponds to the movement trajectory of the first arm 1302 and the second arm 1303. This ensures that the ball valve core 2 can reach the preset angle every time it is opened and closed, avoiding seal damage caused by excessive rotation. It also effectively prevents the valve from being over-opened or over-closed due to the loss of control of the cylinder 4, thereby ensuring the stable operation of the system.

[0026] The working principle and usage process of this embodiment are as follows: Figures 1-5As illustrated, after the oil and gas recovery valve is assembled, it is integrated into the tank truck (the functions and structures of conventional equipment such as tank trucks are well known in the field, and the connection settings are also common knowledge, so they will not be explained in detail here, nor are they shown in the attached drawings). The purpose is to fundamentally solve the structural hazards and operational inconvenience caused by built-in cylinders. It solves the core problems of corrosion resistance, sealing performance, and operational visibility of traditional built-in cylinder valves, and achieves a comprehensive breakthrough in the oil and gas recovery valve in terms of safety, reliability, maintainability, and environmental protection. It provides an efficient and durable technical solution for the tank truck transportation industry, with significant economic benefits and social value.

[0027] When the oil and gas recovery valve needs to be opened, the operator only needs to connect cylinder 4 to a compressed air source. After the air is supplied, cylinder 4 extends its piston rod, driving the first arm 1302 to rotate the drive arm 13 90° around the axis of valve rod 3. This, in turn, causes the valve rod 3 to rotate the ball valve core 2 90°, opening the oil and gas recovery valve (e.g., ...). Figure 4 As shown), allowing the medium to flow; when the oil and gas recovery valve needs to be closed, the operator only needs to disconnect the air supply to cylinder 4. After the air supply is cut off, cylinder 4 retracts its piston rod, driving the first arm 1302 to rotate the drive arm 13 90° in the opposite direction around the axis of valve rod 3. This, in turn, causes the valve rod 3 to simultaneously rotate the ball valve core 2 90° in the opposite direction, closing the valve of the oil and gas recovery valve (as shown). Figure 5 As shown in the figure, this prevents the medium from flowing. Example 2:

[0028] Please see Figures 1-5 As another objective of this utility model, a tank truck is provided, which is equipped with the above-mentioned oil and gas recovery valve. Therefore, the tank truck can obtain any of the beneficial effects of the oil and gas recovery valve described above, which will not be repeated here.

Claims

1. An oil and gas recovery valve, comprising a valve body, a ball valve core disposed within the valve body, a valve stem for driving the ball valve core to rotate, and a cylinder, characterized in that, The valve body has a positioning shaft fixed on the outer side wall of the outlet end, extending outward in a direction perpendicular to the central axis of the valve body. The cylinder body is fixedly connected to the side of the outlet end of the valve body through the positioning shaft. The protruding end of the valve stem is sleeved with a drive arm. The drive arm has a central hole that is sleeved on the protruding end of the valve stem and connected to a key to transmit torque. It also branches from the central hole to form a first arm and a second arm with an obtuse angle. The end of the first arm is hinged to the end of the piston rod of the cylinder through a pin. The cylinder drives the first arm to rotate around the valve stem axis by extending and retracting its piston rod, thereby rotating the ball valve core through the valve stem linkage.

2. The oil and gas recovery valve according to claim 1, characterized in that, The outlet end of the valve body and its ball valve core form an L-shaped ball valve.

3. The oil and gas recovery valve according to claim 2, characterized in that, A valve seat is provided between the outer wall of the ball valve core and the inner wall of the valve body.

4. The oil and gas recovery valve according to claim 3, characterized in that, The valve seat has a valve seat ring on its outer axial direction at the bottom, and two O-rings A are provided radially between the outer wall of the valve seat ring and the inner wall of the valve body.

5. The oil and gas recovery valve according to claim 1, characterized in that, The connecting end of the valve stem is fixedly connected to the ball valve core, and the protruding end of the valve stem passes through the valve body and extends to the outside of the valve body.

6. The oil and gas recovery valve according to claim 5, characterized in that, An O-ring B and a bushing are arranged sequentially from the inside to the outside between the outer wall of the valve stem and the inner wall of the valve body through hole.

7. An oil and gas recovery valve according to claim 5, characterized in that, Two nuts are threaded onto the extended end of the valve stem, and the drive arm is clamped and fixed between the two nuts.

8. The oil and gas recovery valve according to claim 1, characterized in that, A limiting plate is fixed on the outer wall of the valve body, and the limiting plate is provided with limiting bosses corresponding to the movement trajectories of the first arm and the second arm.

9. An oil and gas recovery valve according to claim 1, characterized in that, The cylinder body is fixed with an ear hole seat at its end, and the ear hole seat is vertically sleeved on the end of the positioning shaft.

10. A tank truck, characterized in that, The oil and gas recovery valve includes any one of claims 1-9.

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