Pneumatic valve of oil and gas storage and distribution station

Abstract

The utility model relates to the technical field of safety control of storage tanks of liquefied gas stations, in particular to a pneumatic valve of an oil-gas storage and distribution station. The pneumatic valve of the oil and gas storage and distribution station comprises a valve body, a valve element, a rotating shaft, a shell, a first gear, a barrel, a gas inlet, a piston, a sliding frame, a movable frame, a first rack and a reset assembly, the rotating shaft is rotationally connected into the valve body, the valve element is connected to the rotating shaft, the valve element is in sealing contact with a channel in the valve body, and the shell is connected to the top of the valve body. When the air compressor or the barrel structure breaks down and compressed air cannot be normally injected, the torsion spring and the return spring provide an automatic reset function, the first rack and the first gear are disengaged through the reset assembly, the rotating shaft and the valve element can rotate reversely under the action of the torsion spring, the valve element can be rapidly closed, and the service life of the air compressor or the barrel structure is prolonged. The fluid can be quickly cut off even if the air source is lost, and the safety and the response speed of the system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquefied gas station storage tank safety control technical field especially relates to oil gas storage and distribution station pneumatic valve. BACKGROUND

[0002] Oil gas storage and distribution station is the facility for receiving, storing and distributing petroleum and natural gas. Pneumatic valve is one of the commonly used control devices in such facilities, which uses compressed air as power source to open or close the valve, or adjust the flow rate of fluid through the valve.

[0003] The operation of pneumatic valve depends on an actuator, which converts the pressure of compressed air into mechanical movement to open or close the valve, but if the air compressor or air path system fails, resulting in failure to inject compressed air normally, the pneumatic valve will not be able to perform the opening and closing operation, which may lead to fluid out of control and cause safety hazards. SUMMARY

[0004] In order to overcome the above-mentioned shortcomings, the technical problem of the utility model is to provide an oil gas storage and distribution station pneumatic valve.

[0005] The technical implementation scheme of the utility model is: an oil gas storage and distribution station pneumatic valve, comprising a valve body, a valve core, a rotating shaft, a shell, a first gear, a cylinder, an air inlet, a piston, a sliding frame, a movable frame, a first rack and a reset assembly, the rotating shaft is rotatably connected in the valve body, the valve core is connected on the rotating shaft, the valve core is in sealing contact with the passage in the valve body, the shell is connected on the top of the valve body, the rotating shaft penetrates out of the valve body and into the inside of the shell, the first gear is connected on the upper end of the rotating shaft inside the shell, the cylinder is connected and communicated on the right side of the front of the shell, the air inlet is formed on the front end of the cylinder, the air inlet is connected with the external air compressor, the piston is slidably connected in the cylinder, the sliding frame is connected on the rear side of the piston, the movable frame is slidably connected on the sliding frame, the first rack is connected on the movable frame, the first rack is engaged with the first gear, and the reset assembly is arranged on the shell.

[0006] Further, the reset assembly comprises a torsion spring, a return spring, a first screw and a pushing frame, the first screw is threadedly connected on the upper side of the shell, the pushing frame is rotatably connected on the left end of the first screw inside the shell, the top surface of the pushing frame abuts against the top inside the shell, the torsion spring is connected between the rotating shaft and the inside of the shell, two return springs are connected between the movable frame and the sliding frame, the pushing frame abuts against the movable frame, and the return spring is in tension state.

[0007] Further, the torsion spring is made of spring steel with high elastic modulus.

[0008] Further, it further comprises a plurality of rollers arranged in a line on the left side wall of the pushing frame, and the pushing frame abuts against the movable frame through the rollers.

[0009] Furthermore, it also includes a fixed frame, a second screw, a connecting frame, a third screw, a second rack, and a second gear. The fixed frame is connected to the bottom right side of the housing. The second screw is threadedly connected to the fixed frame. The connecting frame is rotatably connected to the left end of the second screw. The connecting frame is close to the bottom of the housing. The third screw is threadedly connected to the connecting frame. The second rack is threadedly connected to the third screw. The right side wall of the second rack is flat and is close to the connecting frame. The second gear is connected to the upper end of the rotating shaft at the bottom of the housing. The second rack can mesh with the second gear when it moves to the left.

[0010] Furthermore, the right ends of the first and second screws are both connected to knobs, while the front end of the third screw is connected to a rotating wheel.

[0011] Beneficial effects: 1. When the air compressor or cylinder structure malfunctions and cannot inject compressed air normally, the torsion spring and return spring provide an automatic reset function. The reset component disengages the first rack from the first gear, and the rotating shaft and valve core can then reverse under the action of the torsion spring, realizing the rapid closure of the valve core. This ensures that the fluid can be quickly cut off even if the air source is lost, improving the safety and response speed of the system.

[0012] 2. In order to open the valve core normally even without an air supply, a second screw and a third screw are set, and the position of the second rack is adjusted to drive the second gear to rotate, which in turn drives the rotating shaft and the valve core to rotate, so that the valve core can be opened normally, ensuring the normal operation of the equipment and preventing production from being affected by air supply problems.

[0013] 3. Through the above two beneficial effects, a dual safety mechanism is achieved. It is equipped with a manual emergency operation function to ensure effective control of the valve core under any circumstances, thereby improving the reliability and adaptability of the system. In particular, in emergency situations, it can quickly take measures to avoid potential safety hazards. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a first partial sectional view of the valve body and housing components of this utility model.

[0016] Figure 3 This is a cross-sectional view of the shell and cylindrical components of this utility model.

[0017] Figure 4 This is a second partial sectional view of the valve body and housing components of this utility model.

[0018] The above-mentioned figures include the following reference numerals: 1. Valve body, 2. Valve core, 3. Rotating shaft, 4. Housing, 5. First gear, 6. Torsion spring, 7. Cylinder, 8. Air inlet, 9. Piston, 10. Sliding frame, 11. Return spring, 12. Movable frame, 13. First rack, 14. First screw, 15. Push frame, 16. Roller, 17. Fixed frame, 18. Second screw, 19. Connecting frame, 20. Third screw, 21. Second rack, 22. Second gear. Detailed Implementation

[0019] 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 embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: Pneumatic valves in oil and gas storage and distribution stations, such as Figures 1-3 As shown, the device includes a valve body 1, a valve core 2, a rotating shaft 3, a housing 4, a first gear 5, a cylinder 7, an air inlet 8, a piston 9, a sliding frame 10, a movable frame 12, a first rack 13, and a reset assembly. The rotating shaft 3 is rotatably connected inside the valve body 1, and the valve core 2 is connected to the rotating shaft 3. The valve core 2 is in sealed contact with the inner channel of the valve body 1 and is used to control the fluid flow. The housing 4 is connected to the top of the valve body 1. The top of the rotating shaft 3 extends out of the valve body 1 and into the housing 4. The first gear 5 located inside the housing 4 is connected to the upper end of the rotating shaft 3. The cylinder 7 is connected and communicates with the front right side of the housing 4. The air inlet 8 is opened at the front end of the cylinder 7 and is connected to an external air compressor. The piston 9 is slidably connected inside the cylinder 7. The sliding frame 10 is connected to the rear side of the piston 9. The movable frame 12 is slidably connected to the sliding frame 10. The first rack 13 is welded to the movable frame 12 and meshes with the first gear 5. The reset assembly is provided on the housing 4.

[0021] like Figures 2-3As shown, the reset assembly includes a torsion spring 6, a return spring 11, a first screw 14, a pusher frame 15, and a roller 16. The first screw 14 is threadedly connected to the upper side of the housing 4. The pusher frame 15, located inside the housing 4, is rotatably connected to the left end of the first screw 14. The top surface of the pusher frame 15 abuts against the top of the housing 4, ensuring that the pusher frame 15 can only move linearly and cannot rotate. A torsion spring 6 is connected between the rotating shaft 3 and the inside of the housing 4. The torsion spring 6 is made of spring steel with a high elastic modulus, which can ensure that the torsion spring... 6. To maintain stable elastic characteristics within a large deformation range and reduce the influence of nonlinear factors, two return springs 11 are connected between the movable frame 12 and the sliding frame 10. Multiple rollers 16 are rotatably connected in a row on the left side wall of the push frame 15. The push frame 15 abuts against the movable frame 12 through the rollers 16, while the return springs 11 are in a stretched state. The first rack 13 remains engaged with the first gear 5. When the movable frame 12 moves alone, the rollers 16 can play an auxiliary role in movement and avoid friction between the two.

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, it also includes a fixed frame 17, a second screw 18, a connecting frame 19, a third screw 20, a second rack 21, and a second gear 22. The fixed frame 17 is welded to the bottom right side of the housing 4. The second screw 18 is threadedly connected to the fixed frame 17. The connecting frame 19 is rotatably connected to the left end of the second screw 18. The connecting frame 19 is close to the bottom of the housing 4 and can only move linearly due to the limitation of the bottom of the housing 4, and cannot rotate. The third screw 20 is threadedly connected to the connecting frame 19. The second rack 21 is threadedly connected to the third screw 20. The right side wall of the second rack 21 is flat and its right side wall is close to the connecting frame 19. The connecting frame 19 can ensure that the second rack 21 can move linearly and cannot rotate. The second gear 22 is connected to the upper end of the rotating shaft 3 at the position below the housing 4. The second rack 21 can mesh with the second gear 22 when it moves to the left.

[0023] like Figure 2 and Figure 4 As shown, knobs are welded to the right ends of the first screw 14 and the second screw 18, while a rotating wheel is welded to the front end of the third screw 20. The rotating wheel and knobs facilitate the operator to rotate the first screw 14, the second screw 18 and the third screw 20.

[0024] The valve body 1 is connected to the liquefied gas station storage tank equipment. The fluid flow can be controlled by adjusting the valve core 2. An external air compressor is connected at the air inlet 8. When in use, if it is necessary to open the valve body 1 channel, the air compressor generates and maintains a certain pressure of compressed air. This compressed air is delivered into the cylinder 7 through the air inlet 8. The compressed air pushes the piston 9 in the cylinder 7 to move backward, which drives the sliding frame 10 and the movable frame 12 to move backward together. This drives the first rack 13 to move backward. The first rack 13 meshes with the first gear 5, which drives the rotating shaft 3 and the valve core 2 to rotate, thereby controlling the valve core 2 to rotate and open. The opening angle of the valve core 2 is adjusted according to the input air volume to control the fluid flow. During the rotation of the rotating shaft 3, the torsion spring 6 deforms and stores energy for subsequent reset. When the internal air passage structure of the air compressor or cylinder 7 is damaged, causing the gas inside the cylinder 7 to be unable to be discharged normally and the valve core 2 to be unable to close normally, the operator can rotate the first screw 14 to move the push frame 15 and roller 16 to the right, disengaging from the movable frame 12. The return spring 11 rebounds and resets, driving the movable frame 12 and the first rack 13 to move to the right, disengaging the first rack 13 from the first gear 5. Under the strong elastic force, the torsion spring 6 quickly drives the rotating shaft 3, the first gear 5, and the valve core 2 to reverse, achieving rapid closure of the valve core 2. After completing the above operations, the operator can inspect the structure of the air compressor or cylinder 7. After the inspection is completed, rotate the first screw 14 in the opposite direction to move the push frame 15 and roller 16 to the left and reset, causing the roller 16 to push the movable frame 12 and the first rack 13 again. The return spring 11 returns to the stretched state, and the first rack 13 re-engages with the first gear 5, restoring normal operation.

[0025] If a malfunction occurs in the air compressor or the internal air passage structure of the cylinder 7, preventing the normal injection of compressed gas into the cylinder 7 and thus preventing the valve core 2 from opening properly, firstly, the control push frame 15 disengages from the movable frame 12, disengaging the first rack 13 from the first gear 5. Then, the third screw 20 is rotated, causing the connecting frame 19, the third screw 20, and the second rack 21 to move to the left. After the second rack 21 engages with the second gear 22, the third screw 20 is rotated again, causing the second rack 21 to move backward. The second rack 21 then drives the second gear 22 to rotate, which in turn rotates the rotating shaft 3, thereby controlling the opening of the valve core 2. After equipment maintenance, the positions of the second rack 21 and the first rack 13 are returned to their original positions in the reverse order to ensure the system returns to normal operation.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. Pneumatic valves for oil and gas storage and distribution stations, characterized by: The device includes a valve body (1), a valve core (2), a rotating shaft (3), a housing (4), a first gear (5), a cylinder (7), an air inlet (8), a piston (9), a sliding frame (10), a movable frame (12), a first rack (13), and a reset assembly. The rotating shaft (3) is rotatably connected inside the valve body (1), and the valve core (2) is connected to the rotating shaft (3). The valve core (2) is in sealed contact with the internal passage of the valve body (1). The housing (4) is connected to the top of the valve body (1). The top of the rotating shaft (3) extends out of the valve body (1) and into the housing (4). The upper end is connected to a first gear (5) located inside the housing (4). The front right side of the housing (4) is connected to and communicates with a cylinder (7). An air inlet (8) is opened at the front end of the cylinder (7). The air inlet (8) is connected to an external air compressor. A piston (9) is slidably connected inside the cylinder (7). A sliding frame (10) is connected to the rear side of the piston (9). A movable frame (12) is slidably connected on the sliding frame (10). A first rack (13) is connected on the movable frame (12). The first rack (13) meshes with the first gear (5). A reset assembly is provided on the housing (4).

2. The pneumatic valve for oil and gas storage and distribution stations according to claim 1, characterized in that: The reset assembly includes a torsion spring (6), a return spring (11), a first screw (14), and a pusher (15). The first screw (14) is threadedly connected to the upper side of the housing (4). The pusher (15) located inside the housing (4) is rotatably connected to the left end of the first screw (14). The top surface of the pusher (15) abuts against the top of the housing (4). A torsion spring (6) is connected between the rotating shaft (3) and the inside of the housing (4). Two return springs (11) are connected between the movable frame (12) and the sliding frame (10). The pusher (15) abuts against the movable frame (12), and the return springs (11) are in a stretched state.

3. The pneumatic valve for oil and gas storage and distribution stations according to claim 2, characterized in that: The torsion spring (6) is made of spring steel with a high elastic modulus.

4. The pneumatic valve for oil and gas storage and distribution stations according to claim 3, characterized in that: It also includes rollers (16), and multiple rollers (16) are arranged in a row and rotated on the left side wall of the push frame (15). The push frame (15) abuts against the movable frame (12) through the rollers (16).

5. The pneumatic valve for oil and gas storage and distribution stations according to claim 4, characterized in that: It also includes a fixed frame (17), a second screw (18), a connecting frame (19), a third screw (20), a second rack (21), and a second gear (22). The fixed frame (17) is connected to the bottom right side of the housing (4). The second screw (18) is threadedly connected to the fixed frame (17). The connecting frame (19) is rotatably connected to the left end of the second screw (18). The connecting frame (19) is close to the bottom of the housing (4). The third screw (20) is threadedly connected to the connecting frame (19). The second rack (21) is threadedly connected to the third screw (20). The right side wall of the second rack (21) is flat and its right side wall is close to the connecting frame (19). The second gear (22) is connected to the upper end of the rotating shaft (3) at the position below the housing (4). The second rack (21) can mesh with the second gear (22) when it moves to the left.

6. The pneumatic valve for oil and gas storage and distribution stations according to claim 5, characterized in that: The right ends of the first screw (14) and the second screw (18) are both connected to knobs, while the front end of the third screw (20) is connected to a wheel.

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