Pressure differential driven pipeline blasting emergency blocking system

Abstract

This invention is a differential pressure driven pipeline rupture emergency shut-off system, solving the problem that existing devices cannot immediately detect and achieve emergency shut-off when the external control power source or control signal is missing. The valve body has flanges at both axial ends. A cylindrical valve sleeve connects to the inner wall of one flange end. The valve sleeve wall has through holes, and the valve sleeve wall dynamically engages with a valve core with a U-shaped cross-section. The medium through hole on the valve sleeve communicates with the internal cavity of the valve body or is closed by the cylindrical surface of the valve core. A horizontal push rod dynamically engages with the center hole at the left end of the valve core. Both ends of the horizontal push rod dynamically engage with the axial holes of the left and right support seats inside the valve body, respectively. A spring is fitted on the horizontal push rod, located between the left side of the vertical plane of the right support seat and the right side of the vertical plane of the valve core. The lower end of the crank is hinged to the horizontal push rod, and the upper end of the slide rod has a handle that dynamically engages with the axial groove on the cylindrical wall. Low-power wireless pressure transmitters are installed at the left and right ends of the valve body, respectively.

Description

Technical Field

[0001] This invention relates to an automatic emergency shut-off device for pipeline rupture during fluid transport. Background Technology

[0002] Existing automated shut-off protection devices rely on external power sources and sensitive control signals to drive the shut-off protection. In the event of war, accidents, disasters, or information disruptions, the external power source and control signals may be missing, rendering the emergency shut-off function ineffective. Existing automated shut-off protection devices cannot provide forward or reverse burst protection for pressure pipeline storage and transportation and process control; they cannot provide rapid on-site manual assistance for shut-off and system locking; they cannot display the system's operating pressure status on-site; they cannot transmit the device's normal operating pressure, upstream and downstream pipeline burst pressures to higher levels; they cannot simultaneously issue alarm signals for pipeline burst emergency shutdown; and they lack devices for balancing and venting upstream and downstream pipelines after pipeline burst repair and restoration. Summary of the Invention

[0003] The purpose of this invention is to provide a simple structure that requires no external power source or external input signal, relies on the fluid system's own energy, and uses a differential pressure driven shutdown system to achieve forward and reverse burst protection for pressure pipeline storage, transportation, and process control. It also allows for rapid on-site manual assistance in shutting off and locking the system, displays the system's operating pressure status on-site, transmits the normal operating pressure of the device and the burst pressure of upstream and downstream pipelines to higher levels, simultaneously issues an alarm signal for emergency pipeline burst shutdown, and includes a differential pressure driven pipeline burst emergency shutdown system with upstream and downstream pipeline balancing and venting devices after pipeline burst repair and maintenance.

[0004] This invention is implemented as follows:

[0005] This is a differential pressure driven pipeline rupture emergency shut-off system. The valve body has flanges at both ends of its horizontal axis. A cylindrical valve sleeve, open at both ends, connects to the inner wall of the right flange at its right end. The right end of the cylindrical valve sleeve becomes the only passageway on the right side of the valve body. The valve sleeve wall has a medium passage hole. The valve sleeve wall is dynamically fitted with a valve core with a U-shaped cross-section. The medium passage hole on the valve sleeve communicates with the internal cavity of the valve body or is closed by the cylindrical surface of the valve core. A horizontal push rod 8 is dynamically fitted with the vertical plane center hole at the left end of the valve core. Both ends of the horizontal push rod are dynamically fitted with axial holes on the vertical surfaces of the left and right support seats inside the valve body, respectively. The right limiting block 9, rigidly connected to the horizontal push rod, is located on the right side of the vertical plane of the right support seat. The left limiting block 10, rigidly connected to the horizontal push rod, is located on the left side of the valve core's vertical plane. The rigidly connected left limiting block 10 at the left end of the horizontal push rod is used to manually lock the valve core in a stable closed position when the differential pressure drive closes. Alternatively, in case of differential pressure drive failure, the handle can be used to operate the left limiting block 10 to push the valve core to the right, blocking the medium passage on the valve sleeve. The rigidly connected right limiting block 9 at the right end of the horizontal push rod is used to limit the leftward movement of the horizontal push rod. A spring 4 is fitted on the upper part of the valve body. The spring is located between the left side of the vertical plane of the right support and the right side of the vertical plane of the valve core. The medium inlet end of the valve body has a cylinder perpendicular to the horizontal push rod. The inner cavity of the cylinder is dynamically engaged with a slide rod. The lower end of the slide rod is located inside the valve body and hinged to the upper end of a crank. The lower end of the crank is hinged to the horizontal push rod. The upper end of the slide rod has a handle, which dynamically engages with an axial groove on the cylindrical wall and locks with a horizontal groove on the cylindrical wall. Low-power wireless pressure transmitters are installed on the left and right ends of the valve body, respectively, to display the operating pressure status of the device. Battery power is used. The line signal transmits the normal operating pressure of the valve body, the burst pressure of the upstream pipeline, and the burst pressure of the downstream pipeline to the upper level. At the same time, it issues an alarm signal for emergency shutdown in case of pipeline burst. The left and right flange ends of the valve body have left cavity connecting holes and right cavity connecting holes, respectively. There are connecting valves in the middle of the left and right cavity connecting pipes. There are left and right discharge pipes at both ends of the connecting valves. The left and right discharge pipes have left cavity discharge valves, left cavity discharge outlets, right cavity discharge valves, and right cavity discharge outlets, respectively. One or more valve bodies are installed in series in the same or opposite directions in a multi-stage series pipeline system upstream and downstream of the pipeline.

[0006] This is a differential pressure driven pipeline rupture emergency shut-off system. The valve body has flanges at both ends of its horizontal axis. A cylindrical valve sleeve, open at both ends, connects its right end to the inner wall of the right flange. The right end of the cylindrical valve sleeve becomes the only passageway on the right side of the valve body. The valve sleeve wall has a medium passage hole. The valve sleeve wall is dynamically fitted with a valve core with a U-shaped cross-section. The medium passage hole on the valve sleeve communicates with the internal cavity of the valve body or is closed by the cylindrical surface of the valve core. A horizontal slide rod is dynamically fitted with the center of the vertical plane at the left end of the valve core. Both ends of the horizontal slide rod are fitted with axial holes on the vertical surfaces of the left and right support seats inside the valve body, respectively. A spring is fitted on the horizontal slide rod, located between the left side of the vertical plane of the right support seat and the right side of the vertical plane of the valve core. The right limit block of the horizontal slide rod is located on the right side of the vertical plane of the right support seat. The left limit block of the slide bar is located on the left side of the vertical plane of the left support seat. The left and right ends of the valve body are respectively equipped with low-power wireless pressure transmitters, which display the operating pressure status of the device on site. They are powered by batteries and transmit the normal operating pressure of the device, the burst pressure of the upstream pipeline of the valve body, and the burst pressure of the downstream pipeline of the valve body to the upper level via wireless signals. At the same time, they issue an alarm signal for emergency blocking of pipeline burst. The left and right flange ends of the valve body have left cavity connecting holes and right cavity connecting holes, respectively. There are connecting valves in the middle of the left and right cavity connecting pipes. There are left and right discharge pipes at both ends of the connecting valves, respectively. The left and right discharge pipes have left cavity discharge valves, left cavity discharge outlets, right cavity discharge valves, and right cavity discharge outlets, respectively. One or more valve bodies are connected in series and installed upstream and downstream of pipelines without reverse flow.

[0007] This is a differential pressure driven pipeline rupture emergency shut-off system. The valve body has flanges at both ends of its horizontal axis. A cylindrical valve sleeve connects to the inner walls of the left and right ends of the valve body, respectively, serving as the sole passageway for the left and right flange ends. The valve sleeve has medium passage holes on both end walls. The valve sleeve wall and its cross-section are connected by a central axis to two symmetrical U-shaped valve cores in a dynamic fit. The medium passage holes on the valve sleeve communicate with the bidirectional fluid passages within the valve body cavity or are sealed by the cylindrical surface of the valve cores. The central axis is fixedly connected to the plane center of the valve cores. The left horizontal push rod 10 is dynamically fitted with the axial holes of the left first and second supports 14 and 13 within the left end of the valve body, respectively. The right horizontal push rod 27 is dynamically fitted with the axial holes of the right first and second supports 30 and 31 within the right end of the valve body, respectively. The first and second supports have medium passage holes connecting to the inner cavity of the valve sleeve 2 and the left and right valve body cavities 5 and 22. The two first support sections 14 and 30 are symmetrically shaped (U-shape). The two ends of the first spring 4 are respectively sleeved on the outer end of the valve core shaft and the left horizontal push rod 10 in the U-shaped cavity of the left first support 14. When the forward flow pressure difference drives the left valve core 1 to move to the left and close the medium passage 3 at the left end of the valve sleeve, the right manual assist handle 28 and the right horizontal push rod 27 are used to push against the right outer end of the valve core shaft to achieve locking. Alternatively, when the pressure difference drive fails to close, the right assist handle 28 and the horizontal push rod 27 can be used in an emergency to push against the right outer end of the valve core shaft, pushing the left valve core 1 to move to the left to achieve closure and locking. 2. The two ends of spring 21 are respectively fitted onto the right extended end of the valve core shaft and the right horizontal push rod 27 in the U-shaped cavity of the right first support 30. When the reverse flow pressure difference drives the right valve core 19 to move to the right and close the medium passage 20 at the right end of the valve sleeve, the left manual assist handle 11 and the left horizontal push rod 10 are used to push against the left extended end of the valve core shaft to achieve locking. Alternatively, in case the pressure difference drive fails to close, the left assist handle 11 and the left horizontal push rod 10 can be used in an emergency to push against the left extended end of the valve core shaft, pushing the right valve core 19 to the right to achieve closure and locking. The valve body has cylinders perpendicular to the horizontal push rod at both ends. The inner cavity of the column is dynamically fitted with the slide rod. The lower end of the slide rod is located inside the valve body and hinged to the upper end of the crank. The lower end of the crank is hinged to the horizontal push rod. The upper end of the slide rod has a handle, which dynamically fits with the axial groove on the cylindrical wall and locks with the horizontal groove on the cylindrical wall. The left and right horizontal push rods on both sides of the crank have left and right limit blocks respectively. The first and second left limit blocks 8 and 9 are rigidly connected to the left horizontal push rod, and the first and second right limit blocks 25 and 26 are rigidly connected to the right horizontal push rod. The left and right ends of the valve body are respectively equipped with low-power wireless pressure transmitters to display the valve body's operating pressure status on site. Powered by battery, the valve body transmits its normal operating pressure, upstream pipeline burst pressure, and downstream pipeline burst pressure to the host computer via wireless signal. Simultaneously, it issues an alarm signal for emergency pipeline burst interruption. The valve body has a left-cavity connecting hole and a right-cavity connecting hole at the left and right flange ends, respectively. A connecting valve is located in the middle of the left and right cavity connecting pipes. Left and right discharge pipes are located at both ends of the connecting valves, with a left-cavity discharge valve, a left-cavity discharge outlet, a right-cavity discharge valve, and a right-cavity discharge outlet on each pipe. One or more valve bodies are connected in series in the same or opposite directions in a multi-stage pipeline system upstream and downstream of the pipeline.

[0008] The advantages of this invention are as follows:

[0009] 1. The present invention has a simple structure, and the spring ensures that the valve body remains in the open state within the permissible flow range.

[0010] 2. No external control power source or external input signal is required. It relies on the pressure difference of the fluid system itself to achieve forward and reverse burst protection for pressure pipeline storage and transportation and process control systems. It is also equipped with a field-based quick manual assisted shut-off and locking device.

[0011] 3. The manual quick-assist structure of the present invention can independently cut off in an emergency, and can also serve as a backup cut-off protection in case of pressure differential drive cut-off failure. It enhances the reliability and stability of pressure differential drive emergency blocking, while meeting the reliability requirement that the first opening after maintenance must be done manually on site.

[0012] When a burst occurs at point G in the system, the differential pressure driven shut-off of this device located upstream and downstream of point G, along with manual rapid-assisted shut-off and locking, limits the loss and impact to the pipe section between A1 and A2. If point G is close to device A1 or A2, causing the protection to fail, the differential pressure driven shut-off of the same model connected in series upstream and downstream of device A1 or A2 can still be automatically activated to implement differential pressure driven shut-off and manual rapid-assisted shut-off and locking, ensuring the normal operation of the pipeline network with forward and reverse flow pressure sources upstream and downstream of A1 or A2, limiting the loss and impact to a minimum, and achieving greater protection.

[0013] 5. The transmission for this on-site rapid manual assisted cutting adopts a crank-connecting rod mechanism, which is faster than the gear and rack, screw and nut, worm gear and worm wheel transmissions used in existing technologies, increasing the manual assisted cutting speed several times;

[0014] 6. The left and right ends of the valve body are respectively equipped with low-power wireless pressure transmitters (model: MGTR-S5x71) to display the operating pressure status of the device. They are battery powered and transmit the normal operating pressure of the device, the burst pressure of the upstream pipeline, and the burst pressure of the downstream pipeline to the upper level via wireless signal. At the same time, they issue an alarm signal for emergency shutdown in case of pipeline burst.

[0015] 7. To facilitate repair and maintenance of the pipeline after a rupture, pressure balance between the upstream and downstream of the unit, and removal of pipeline residue, a complete system was designed, including balancing pipelines and balancing valves at both ends of the unit, and residue discharge outlets and control valves at both ends of the unit.

[0016] 8. Three different systems were specially designed for different usage environments and operating conditions. Attached Figure Description

[0017] Figure 1This is a structural diagram of Embodiment 1 of the present invention.

[0018] Figure 2 This is a structural diagram of Embodiment 1 of the present invention.

[0019] Figure 3 This is a structural diagram of Embodiment 2 of the present invention.

[0020] Figure 4 This is a structural diagram of Embodiment 2 of the present invention.

[0021] Figure 5 This is a structural diagram of Embodiment 3 of the present invention.

[0022] Figure 6 This is a structural diagram of embodiment 3 of the present invention.

[0023] Figure 7 Existing technology similar system layout structure diagram

[0024] (System layout diagram similar to the Dalian XX major accident on July 16, 2010). Detailed Implementation

[0025] Example 1

[0026] The valve body has flanges at both ends of the horizontal axis. The right end of the cylindrical valve sleeve 2, which is open at both ends, is connected to the inner wall of the right flange end. The right end of the cylindrical valve sleeve becomes the only passage at the right end of the valve body. There is a medium passage hole 3 on the valve sleeve wall. The valve sleeve wall is dynamically fitted with the valve core 1, which has a cross-section of U. The passage hole on the valve sleeve is connected to the inner cavity of the valve body or is closed by the cylindrical surface of the valve core. The horizontal push rod 8 is dynamically fitted with the axial hole at the center of the vertical plane of the left end of the valve core. The two ends of the horizontal push rod are dynamically fitted with the axial holes on the vertical surfaces of the left and right support seats 13 and 14 in the valve body, respectively. The right limit block 9 of the horizontal push rod is located on the right side of the vertical plane of the right support seat. The left limit block 10 of the horizontal push rod is located on the left side of the vertical plane of the valve core. A spring 4 is sleeved on the horizontal push rod. The spring is located between the left side of the vertical plane of the right support seat and the right side of the vertical plane of the valve core.

[0027] The medium inlet end of the valve body has a cylinder perpendicular to the horizontal push rod. The inner cavity of the cylinder is dynamically engaged with the slide rod. The lower end of the slide rod is located inside the valve body and is hinged to the upper end of the crank. The lower end of the crank is hinged to the horizontal push rod 8. The upper end of the slide rod has a handle 11. The handle 11 is dynamically engaged with the axial groove on the cylindrical wall and locked with the horizontal groove 12 on the cylindrical wall.

[0028] This invention provides an emergency shut-off protection device for unidirectional flow fluid transmission pipelines in the event of a pressure differential-driven pipeline burst. The device includes a manual, rapid-assisted shut-off and locking mechanism.

[0029] This device operates as a unidirectional flow system during normal fluid transmission. When a pipeline ruptures downstream of the device, a pressure difference is generated between the upstream and downstream ends, driving valve core 1 to move to the right, closing valve sleeve orifice 3 to cut off forward flow and prevent upstream media from continuing to leak to the downstream rupture site. To prevent pressure fluctuations and oscillations in the upstream and downstream systems after the pipeline rupture device closes, affecting the sealing, a manually assisted cutting handle 11 and a locking device 12 are installed on-site to ensure reliable closure. During normal operation, the manually assisted cutting handle 11 and locking device 12 are in the open position to ensure that pressure difference-driven cutting, without the need for external power or control signals, takes priority, while manually assisted cutting and locking are delayed. This manual quick-acting assisted structure can also serve as backup protection in case of pressure differential drive cut-off failure. When a burst occurs at point G in the pipeline between the two cut-off devices (A1 and A2) installed during normal operation of the forward flow system, the pressure differential drive cut-off of device A1 takes priority, and manual quick-acting assisted cut-off and locking are applied to promptly stop the forward flow from leaking to the burst point G. To prevent the reverse pressure generated by the downstream pipeline containing the medium and the terrain from leaking to the burst point G, the manual quick-acting cut-off and locking mechanism is applied in an emergency to shut down device A2, thereby ensuring that the pipeline burst loss is limited to between A1 and A2.

[0030] After the pipeline rupture repair, to restore the normal operation of the device and achieve pressure balance between the left and right ends, a left cavity connecting hole 16 and a right cavity connecting hole 17, a left-right cavity connecting pipe 18, and a left-right cavity connecting valve 19 were designed. During normal operation, valve 19 is closed; it is opened when balance is required. After pipeline rupture repair, non-polluting water and gas are released into the atmosphere or rivers through the left cavity connecting hole 16 and the right cavity connecting hole 17, respectively. Harmful gases and water are discharged into sealed containers. Left cavity discharge valve 20, right cavity discharge valve 22, left cavity discharge outlet 21, and right cavity discharge outlet 23 are all normally closed during normal operation of the device.

[0031] After a pipeline rupture, low-power wireless pressure transmitters (model: MGTR-S5x71) are installed on the left and right ends of the valve body to display the operating pressure status of the device. Powered by batteries, they wirelessly transmit the normal operating pressure, the upstream pipeline rupture pressure, and the downstream pipeline rupture pressure to the upper-level system, while simultaneously issuing an alarm signal for emergency pipeline rupture shutdown. This facilitates decisive handling by the upper-level system and preserves data for post-accident analysis. For example, if the left gauge shows normal pressure while the right gauge shows a rapid drop to near zero ("0"), this indicates a downstream pipeline rupture. Conversely, if the right gauge shows normal pressure while the left gauge shows a rapid drop to near zero ("0"), this indicates an upstream pipeline rupture.

[0032] Figure 1The device of this invention is in the closed state after the downstream pipeline bursts. The pressure difference drives the compression spring 4, which pushes the valve core 1 to the right, closing the valve sleeve hole 3 and cutting off the discharge to the downstream burst opening. At the same time, the manual handle assists in closing and locking.

[0033] Figure 1 Unidirectional flow pressure differential driven pipeline burst emergency blocking device (equipped with manual assistance for closing and locking).

[0034] 1. Valve core 2. Valve sleeve 3. Valve sleeve bore 4. Spring

[0035] 5. Valve body cavity; 6. Crank; 7. Slide rod; 8. Horizontal push rod

[0036] 9. Right limit block; 10. Left limit block; 11. Assisted closing handle

[0037] 12. Assisted closing handle lock 13. Left support base 14. Right support base 15. Low-power wireless pressure transmitter (Model: MGTR-S5x71) 16. Left cavity connecting port 17. Right cavity connecting hole; 18. Left and right cavity connecting tube 19. Left and right chamber connecting valve; 20. Left chamber discharge valve; 21. Left chamber discharge outlet. 22. Right chamber discharge valve 23. Right chamber discharge outlet.

[0038] Figure 2 Diagram of an emergency blocking system for pipeline bursting driven by unidirectional flow pressure difference.

[0039] When the device operates normally as a unidirectional flow system, it enters an emergency shut-off protection state after a pipe rupture at point G between devices A and B in the system.

[0040] Figure 2 This device (including manual rapid assisted cutting and locking) system application principle diagram.

[0041] The device of the present invention is arranged at point A1.

[0042] The device of the present invention is arranged at point A2.

[0043] The device of the present invention is arranged at point A3.

[0044] Location G of the blasting point.

[0045] Function and role of the point: When a blast occurs at point G downstream of point A1, the device A1 is shut down in time by passive differential pressure to prevent the forward flow from continuing to leak to the blast point G. At the same time, manual assistance is provided to quickly cut off and lock the flow.

[0046] Function and role of the point: When a blast occurs at point G upstream of point A2, it is quickly cut off and locked by manual assistance to prevent the flow from continuing to leak towards the blast point G.

[0047] Implementation effect: Ensure that the impact of the G-point blast is controlled within the A1-A2 pipe section.

[0048] Example 2

[0049] The differential pressure driven pipeline burst emergency blocking system has flanges at both ends of the valve body in the horizontal axis. The right end of the cylindrical valve sleeve, which is open at both ends, is connected to the inner wall of the right flange end. The right end of the cylindrical valve sleeve becomes the only channel at the right end of the valve body. There is a medium passage hole 3 on the wall of the valve sleeve 2. The valve sleeve wall is dynamically fitted with the valve core 1, which has a cross-section of U. The passage hole on the valve sleeve is connected to the inner cavity of the valve body or is closed by the cylindrical surface of the valve core. The horizontal slide rod 8 is dynamically fitted with the axial hole at the center of the vertical plane of the left end of the valve core. The two ends of the horizontal slide rod are respectively fitted with the axial holes on the vertical surfaces of the left and right support seats 6 in the valve body. A spring 4 is sleeved on the horizontal slide rod 8. The spring 4 is located between the left side of the vertical surface of the right support seat and the right side of the vertical plane of the valve core.

[0050] The right limiting block of the horizontal slide bar 8 is located on the right side of the vertical plane of the right support seat, and the left limiting block of the horizontal slide bar 8 is located on the left side of the vertical plane of the left support seat.

[0051] This invention's device is suitable for emergency shut-off protection in systems with unidirectional fluid flow and continuously stable pressure. It provides differential pressure-driven unidirectional protection in pipeline networks or fluid control systems with stable forward flow and pressure. It also provides differential pressure-driven unidirectional protection at the end of the fluid control system or in systems without reverse flow. A low-power wireless pressure transmitter (model: MGTR-S5x71) is installed on the left and right ends of the valve body to display the device's operating pressure status. Powered by battery, it wirelessly transmits the device's normal operating pressure, upstream pipeline burst pressure, and downstream pipeline burst pressure to the upstream unit, while simultaneously issuing an emergency shut-off signal for pipeline burst. The alarm signals facilitate decisive handling by the upper-level system and preserve data for post-accident analysis. For example, if the left gauge shows normal pressure while the right gauge shows a rapid drop in pressure close to zero ("0"), this indicates a downstream pipeline rupture. If the right gauge shows normal pressure while the left gauge shows a rapid drop in pressure close to zero ("0"), this indicates an upstream pipeline rupture. To ensure pressure balance between upstream and downstream of the device after pipeline rupture repair and restoration, and to remove pipeline residues, a balancing pipeline and balancing valve are designed at both ends of the device. Pipelines and control valves at both ends of the device discharge residues, releasing unpolluted water and gas into the atmosphere or rivers, and harmful gases and water into sealed containers. This is a complete system.

[0052] Figure 3When the device of this invention is in a stable unidirectional flow state for fluid transmission, the spring 4 and valve core 1 are in the open state, and the valve sleeve hole 3 is in the fully open position, smoothly and normally conveying fluid to the downstream pipeline; when the downstream pipeline bursts, the pressure difference drives the valve core 1 to compress the spring 4, push the valve core 1 to the right, close the valve sleeve hole 3, and cut off the release to the downstream burst opening. Because there is a reliable and lasting stable pressure upstream, continuous and reliable cut-off is guaranteed.

[0053] Figure 3 Unidirectional flow pressure differential driven pipeline burst emergency blocking device.

[0054] 1. Valve core 2. Valve sleeve 3. Valve sleeve bore 4. Spring

[0055] 5. Valve body cavity; 6. Support seat; 7. Low-power wireless pressure transmitter (model: MGTR-S5x71) 8. Horizontal slide bar; 9. Right limit block; 10. Left limit block; 11. Valve sleeve limit ring. 12. Right cavity connecting hole; 13. Left cavity connecting hole; 14. Left and right cavity connecting pipe; 15. Left and right cavity connecting valve. 16. Left chamber release valve 17. Left chamber outlet 18. Right chamber release valve 19. Right chamber outlet

[0056] Figure 4 This diagram illustrates a unidirectional flow pressure differential-driven emergency shut-off system. It shows the application of this invention in a system where the unidirectional flow pressure is continuously stable and there is no reverse flow.

[0057] : Arrangement point A of the device of the present invention.

[0058] Application terminal deployment point B.

[0059] Location G of the blasting point.

[0060] The function and role of the point: When a blast occurs at point G downstream of point A, the pressure difference drives the timely shut-off device A to prevent the forward flow from continuing to leak towards the blast point G.

[0061] Function and role of point B: When point G upstream of point B is blasted, the end user will stop operating due to lack of fluid supply. At this time, even though there is no reverse flow, the device at point B should be shut down and the user should wait for repair before use.

[0062] Implementation effect: Ensured that the impact of the G-point blast was controlled within the AB pipe section.

[0063] Example 3

[0064] This is a differential pressure driven pipeline rupture emergency shut-off device. The valve body has flanges at both ends of its horizontal axis. A cylindrical valve sleeve connects to the inner walls of the valve body at its left and right ends, respectively, serving as the sole passageway for the left and right flange ends. The valve sleeve has medium passage holes on both ends of its sleeve. The valve sleeve wall and its cross-section are connected by two symmetrical U-shaped valve cores via a central axis. The medium passage holes on the valve sleeve communicate with the bidirectional fluid channel within the valve body cavity or are sealed by the cylindrical surface of the valve cores. The central axis is fixedly connected to the plane center of the valve cores. The left horizontal push rod 10 engages with the axial holes of the first and second supports 14 and 13 within the left end of the valve body, respectively. The right horizontal push rod 27 engages with the axial holes of the first and second supports 30 and 31 within the right end of the valve body, respectively. The first and second supports have axial holes connecting to the inner cavity of the valve sleeve 2 and the left and right valve body cavities 5 and 22. The two first support sections 14 and 30 are symmetrically shaped (U-shape). The two ends of the first spring 4 are respectively fitted onto the extended end of the valve core shaft and the left horizontal push rod 10 in the U-shaped cavity of the left first support 14. The two ends of the second spring 21 are respectively fitted onto the extended end of the valve core shaft and the right horizontal push rod 27 in the U-shaped cavity of the right first support 30.

[0065] The valve body has cylinders perpendicular to the horizontal push rods at both ends. The inner cavity of the cylinders is dynamically engaged with the slide rod. The lower end of the slide rod is located inside the valve body and hinged to the upper end of the crank. The lower end of the crank is hinged to the horizontal push rod. The upper end of the slide rod has a handle, which is dynamically engaged with the axial groove on the cylindrical wall and locked with the horizontal groove on the cylindrical wall. The horizontal push rods on both sides of the crank have left and right limit blocks 8 and 9 or left and right limit blocks 25 and 26 respectively. The left and right ends of the valve body are equipped with low-power wireless pressure transmitters (model: MGTR-S5x71) to display the operating pressure status of the device. They are battery powered and transmit the normal operating pressure of the device and the burst pressure of the upstream pipeline to the upper level via wireless signals. This device detects the pressure of a downstream pipeline burst and simultaneously issues an alarm signal for emergency pipeline rupture shutdown. This facilitates decisive handling by the upper-level system and preserves data for post-accident analysis. For example, if the left gauge shows normal pressure while the right gauge shows a rapid drop to near zero ("0"), this indicates a downstream pipeline burst. If the right gauge shows normal pressure while the left gauge shows a rapid drop to near zero ("0"), this indicates an upstream pipeline burst. The valve body has left and right flanges with left and right cavity connecting holes, respectively. Connecting valves are located in the middle of the left and right cavity connecting pipes, with left and right discharge pipes at both ends. Each discharge pipe has a left cavity discharge valve, a left cavity discharge outlet, a right cavity discharge valve, and a right cavity discharge outlet, respectively.

[0066] The bidirectional flow pressure differential driven pipeline burst protection device is equipped with a bidirectional manual rapid-assisted closing and locking mechanism.

[0067] The present invention provides a bidirectional flow differential pressure driven explosion protection device, which provides reliable bidirectional emergency shut-off protection for systems that require bidirectional flow in pipeline transmission of annular supply fluid and process control pipeline systems.

[0068] Differential pressure drive + quick manual assistance + locking + pressure signal display + system balancing (two-way protection).

[0069] Figure 5 It is a bidirectional pressure differential driven pipeline rupture emergency blocking device (including bidirectional manual rapid-assisted cutting and locking).

[0070] 1. Left valve core 2. Valve sleeve 3. Left end through hole of valve sleeve 4. Left spring 5. Left valve body cavity 6. Left crank 7. Left slide rod 8. Left horizontal push rod A limit block 9. Left horizontal push rod B limit block 10. Left horizontal push rod 11. Left assisted closing handle 12. Left assisted closing handle lock 13. Left horizontal push rod support A 14. Left horizontal push rod support B 15. Bidirectional fluid passage 16. Bidirectional flow valve body 17. Left end connecting flange 18. Right end connecting flange 19. Right valve core 20. Right end through hole of valve sleeve 21. Right spring 22. Right valve body cavity 23. Right crank 24. Right slide rod 25. Right horizontal push rod A limit block 26. Right horizontal push rod B limit block 27. Right horizontal push rod 28. Right assisted closing handle 29. Right assisted closing handle lock 30. Right horizontal push rod support A 31. Right horizontal push rod support B 32. Left cavity connecting pipe; 33. Right cavity connecting pipe; 34. Left and right cavity connecting pipe; 35. Left and right cavity connecting valve; 36. Left cavity pressure relief valve; 37. Left cavity pressure relief outlet; 38. Right cavity pressure relief valve; 39. Right cavity pressure relief outlet.

[0071] 40. Low-power wireless pressure transmitter (Model: MGTR-S5x71)

[0072] 41. Low-power wireless pressure transmitter (model: MGTR-S5x71).

[0073] Figure 5 This device is in the unloaded position. The left spring 4 and the right spring 21 are in symmetrical balance. The left valve core 1 and the right valve core 19 are in the middle position. The left end through hole 3 and the right end through hole 20 of the valve sleeve are in the open position, ready for forward or reverse flow.

[0074] When the upstream flow passes through at the designed normal flow rate, the fluid is transmitted to the downstream pipeline of this device through the right valve body cavity 22, the right valve sleeve hole 20, the bidirectional fluid channel 15, the valve sleeve left end through hole 3, and the left valve body cavity 5. Under normal flow conditions, the pressure difference thrust at both ends of this device cannot overcome the thrust of the left spring 4, and the valve sleeve left end through hole 3 is always open, and the system is in normal operation. When a pipeline bursts downstream of this device, the flow velocity rises instantaneously, causing the pressure difference between the right valve core 19 and the left valve core 1 to suddenly increase. The pressure difference pushes the left valve core 1 to move to the left against the thrust of the left spring 4, closing the valve sleeve left end through hole 3 and achieving device shut-off. To prevent further leakage to the burst opening and to prevent pressure fluctuations and oscillations in the upstream and downstream systems from affecting the shut-off seal after the pipeline burst device is closed, the right assisted shut-off handle 28 and the left assisted shut-off handle locking 29 are immediately used to achieve manual quick-assisted shut-off and locking, ensuring the reliability of this device.

[0075] When reverse flow occurs downstream, the fluid passes through the left valve body cavity 5, the left end through hole 3 of the valve sleeve, the bidirectional fluid channel 15, the right valve sleeve hole 20, and the right valve body cavity 22, and is transmitted to the upstream pipeline of this device. During normal flow, the pressure difference thrust at both ends of this device cannot overcome the thrust of the right spring 21, and the right valve sleeve hole 20 is always in the open state, and the system is in normal operation. When a pipeline bursts upstream of this device, the flow velocity rises instantaneously, causing the pressure difference between the left valve core 1 and the right valve core 19 to suddenly increase. The pressure difference pushes the right valve core 19 to move to the right against the thrust of the right end spring 21, closing the right valve sleeve hole 20 and achieving device cut-off. To prevent further leakage to the burst opening and to prevent pressure fluctuations and oscillations in the upstream and downstream systems from affecting the sealing after the pipeline burst device is closed, the left assisted closing handle 11 and the right assisted closing handle locking 12 are immediately used to achieve manual and rapid assisted cut-off and locking, ensuring the reliability of this device.

[0076] Figure 6 This is a diagram of a two-way flow pressure differential-driven blasting emergency blocking system.

[0077] The device of the present invention is arranged at point A1.

[0078] The device of the present invention is arranged at point A2.

[0079] The device of the present invention is arranged at point A3.

[0080] Location G of the blasting point.

[0081] Location E of the blasting point.

[0082] Function and role of the point: When a burst occurs at point G downstream of point A1, the valve core at the left end of A1 is shut off in time by pressure difference to prevent the forward flow from continuing to leak to the burst point G. At the same time, manual assistance is applied to quickly cut off and lock the valve.

[0083] Function and role of the point: When the explosion occurs at point G upstream of point A2, the reverse flow is driven by the pressure difference to cut off and close the valve core at the right end of A2 in time, preventing the reverse flow from continuing to leak to the explosion point G. At the same time, manual assistance is applied to quickly cut off and lock the flow.

[0084] The function and role of the point: to limit the damage and impact of the explosion at point E to the section between pipe A2 and A3; to quickly and reliably block the explosion and ensure the safety of the oil tank.

[0085] Reverse flow: originates from the fluid capacity within the pipeline, the potential energy generated by the terrain downstream of the burst point; inherent reverse pressure flow in the design of the process control system; and reverse flow permitted in the design of systems such as annular heating, water supply, gas supply, and oil supply.

[0086] Implementation results:

[0087] 1) The device of the present invention realizes pipeline burst protection with complete differential pressure driven control (driven by the system's own energy) for bidirectional flow pipeline systems, and at the same time realizes bidirectional manual rapid-assisted cutting off and locking, thereby improving the stability and reliability of differential pressure driven pipeline burst protection device.

[0088] The device of this invention ensures that the damage and impact of the explosion at point G are controlled within the A1-A2 pipe section. It also ensures the normal operation of the pipe network upstream of point A1 with a positive flow source and the normal operation of the pipe network downstream of point A2 with a reverse flow source.

[0089] The device of this invention ensures that the damage and impact of the explosion at point E are controlled within the A2-A3 pipe section, providing rapid and reliable blocking and ensuring the safety of the oil tank.

[0090] The manual quick cut-off and locking system of the present invention enhances the reliability and stability of differential pressure drive, while meeting the reliability requirement that the first opening after maintenance must be done manually on site.

[0091] This invention displays the operating status on-site, wirelessly transmits normal operating pressure, upstream pipeline burst pressure, and downstream pipeline burst pressure, and issues an alarm signal for emergency pipeline burst shutdown. This facilitates decisive handling by the superior system and preserves data for post-accident analysis.

[0092] Comparative analysis of the layout structure diagram of similar systems in Embodiment 3 of the present invention and the prior art.

[0093] like Figure 7 As shown.

[0094] 1. Simplified introduction of the complex system in the Dalian XX major accident on July 16, 2010, based on existing technology: According to reports from Xinhua News Agency and other media: "On July 16, 2010, an operational error occurred during the unloading operation of the Dalian XX oil tanker, causing crude oil leakage and fire in the pipeline, which triggered the rupture of pipelines in the pipeline corridor. Two pipelines (900mm and 700mm) exploded."5 m 3 The oil tank burned out, and the fire was completely extinguished on the 18th. Storage and transportation equipment for special media such as oil and gas, toxic, flammable, explosive, and radioactive substances are extremely prone to leakage. If careful precautions are not taken, similar incidents may occur again.

[0095] 1) The oil pipeline from the unloading point to the tank inlet should be equipped with a three-stage shut-off device: a pump outlet shut-off valve, an emergency shut-off valve, and a tank inlet shut-off valve. Figure 7 The explosions caused by B1, B2, and B3 start from the pump outlet. Under normal circumstances, the electric shut-off valve should close in 2-5 minutes, and manually in 5-10 minutes. After power failure, it relies entirely on manual closing, which cannot interrupt the flow instantaneously, and the explosion will spread rapidly.

[0096] 2) The tank burned out only when all three levels of shut-off valves (B1, B2, and B3) failed. The electric shut-off valves and emergency shut-off valves lost power due to the fire and could not be closed electrically. The tank inlet shut-off valve was closed manually by hand for more than ten hours. The manual closing was too slow and the high temperature of the explosion caused deformation, which prevented it from completely stopping the fire. This caused the last line of defense to collapse, and the burning oil flow ignited the 100,000 cubic meter oil tank...

[0097] 3) The storage area has an external pumping station, an independent fire water supply ring network, and fixed sprinkler and foam fire extinguishing systems for the oil tanks. However, these systems cannot operate due to power failure during a fire (no power source), rendering them useless.

[0098] 2. Embodiment 3 of the pressure differential driven pipeline rupture emergency blocking system of the present invention can overcome the shortcomings of the prior art.

[0099] 1) The oil pipeline from the unloading point to the tank inlet should be equipped with a three-stage differential pressure driven pipeline rupture emergency shut-off device, at the pump outlet, pipeline mid-section, and tank inlet; if Figure 6 If the explosion in A1, A2, and A3 originates from the outlet of the unloading ship's pump, it requires a three-stage differential pressure-driven shut-off followed by a three-stage rapid manual-assisted shut-off and locking. Each stage involves transient differential pressure shut-off and flow interruption, followed by locking to achieve zero leakage. It is impossible for the explosion to extend to the oil tank through these three stages of interruption.

[0100] 2) Pressure differential driven pipeline rupture emergency shut-off device, such as Figure 6 The tank burns out only if all three levels of shut-off (A1, A2, and A3) fail. The pump outlet, pipeline section, and tank inlet are all equipped with differential pressure-driven automatic shut-off, plus three levels of rapid manual assisted shut-off and locking. The differential pressure-driven shut-off is very fast, taking 0.8-5 seconds, while the rapid assisted shut-off and locking takes 5-10 seconds. The accelerated shut-off speed promptly blocks the transmission of the flammable and explosive flow, preventing its spread and minimizing damage and impact.

[0101] 3) The response speed of differential pressure driven emergency shutdown is an advantage, and the rapid manual assisted cut-off and locking structure is an advantage of backup protection. The differential pressure transient shutdown and flow interruption + rapid manual backup protection ensure the reliability of emergency shutdown.

Claims

1. A differential pressure driven pipeline rupture emergency shut-off system, characterized in that, The valve body has flanges at both ends of its horizontal axis. The right end of a cylindrical valve sleeve, open at both ends, connects to the inner wall of the right flange. The right end of the cylindrical valve sleeve becomes the only passageway on the right side of the valve body. The valve sleeve wall has a medium passage hole. The valve sleeve wall is dynamically fitted with a valve core with a U-shaped cross-section. The medium passage hole on the valve sleeve communicates with the internal cavity of the valve body or is closed by the cylindrical surface of the valve core. The horizontal push rod is dynamically fitted with the vertical plane center hole at the left end of the valve core. Both ends of the horizontal push rod are dynamically fitted with axial holes on the vertical surfaces of the left and right support seats inside the valve body. The right limit is rigidly connected to the horizontal push rod. The position block is located on the right side of the vertical plane of the right support seat, and the left limit block, which is rigidly connected to the horizontal push rod, is located on the left side of the vertical plane of the valve core. The left limit block, which is rigidly connected to the left end of the horizontal push rod, is used to manually lock the valve core in a stable closed position when the differential pressure drive is closed, or, in case of differential pressure drive failure, to use the handle to assist in operating the left limit block to push the valve core to the right to the medium passage hole blocking position on the valve sleeve. The right limit block, which is rigidly connected to the right end of the horizontal push rod, is used to limit the leftward movement of the horizontal push rod. A spring (4) is sleeved on the horizontal push rod, and the spring is located on the right side. Between the left side of the vertical plane of the support base and the right side of the vertical plane of the valve core, there is a cylinder perpendicular to the horizontal push rod at the medium inlet end of the valve body. The inner cavity of the cylinder is dynamically engaged with a slide rod. The lower end of the slide rod is located inside the valve body and is hinged to the upper end of the crank. The lower end of the crank is hinged to the horizontal push rod. There is a handle at the upper end of the slide rod. The handle is dynamically engaged with the axial groove on the cylindrical wall and locked with the horizontal groove on the cylindrical wall. Low-power wireless pressure transmitters are installed on the left and right ends of the valve body, respectively, to display the operating pressure status of the device. It is battery powered and transmits wireless signals to the upper level. It transmits the normal operating pressure of the valve body, the burst pressure of the upstream pipeline, and the burst pressure of the downstream pipeline, and simultaneously issues an alarm signal for emergency shutdown in case of pipeline burst. The left and right flange ends of the valve body have left cavity connecting holes and right cavity connecting holes, respectively. There are connecting valves in the middle of the left and right cavity connecting pipes. There are left and right discharge pipes at both ends of the connecting valves, respectively. The left and right discharge pipes have left cavity discharge valves, left cavity discharge outlets, right cavity discharge valves, and right cavity discharge outlets, respectively. One or more valve bodies are installed in series in the same or opposite directions in a multi-stage series pipeline system upstream and downstream of the pipeline.

2. A differential pressure driven pipeline rupture emergency shut-off system, characterized in that, The valve body has flanges at both ends of its horizontal axis. A cylindrical valve sleeve, open at both ends, connects its right end to the inner wall of the right flange. The right end of the cylindrical valve sleeve becomes the only passageway on the right side of the valve body. The valve sleeve wall has a medium passage hole. The valve sleeve wall is dynamically fitted with a valve core with a U-shaped cross-section. The medium passage hole on the valve sleeve communicates with the internal cavity of the valve body or is closed by the cylindrical surface of the valve core. The horizontal slide rod is dynamically fitted with the center of the vertical plane at the left end of the valve core. Both ends of the horizontal slide rod are fitted with axial holes on the vertical surfaces of the left and right support seats inside the valve body, respectively. A spring is fitted on the horizontal slide rod, located between the left side of the vertical plane of the right support seat and the right side of the vertical plane of the valve core. The right limit block of the horizontal slide rod is located on the right side of the vertical plane of the right support seat, and the left limit block of the horizontal slide rod... Located on the left side of the vertical plane of the left support, the valve body is equipped with a low-power wireless pressure transmitter on the left and right ends respectively. It displays the operating pressure status of the device on site. It is powered by battery and transmits the normal operating pressure of the device, the burst pressure of the upstream pipeline and the burst pressure of the downstream pipeline to the upper level via wireless signal. At the same time, it issues an alarm signal for emergency blocking of pipeline burst. The left and right flange ends of the valve body have left cavity connecting holes and right cavity connecting holes respectively. There are connecting valves in the middle of the left and right cavity connecting pipes. There are left and right discharge pipes at both ends of the connecting valves respectively. The left and right discharge pipes have left cavity discharge valve, left cavity discharge outlet, right cavity discharge valve and right cavity discharge outlet respectively. One or more valve bodies are connected in series and installed upstream and downstream of the pipeline without reverse flow.

3. A differential pressure driven pipeline rupture emergency shut-off system, characterized in that, The valve body has flanges at both ends of the horizontal axis. The left and right ends of the cylindrical valve sleeve are connected to the inner walls of the left and right ends of the valve body, respectively. The left and right ends of the valve sleeve become the only channels of the left and right flange ends, respectively. There are medium passage holes on the walls of both ends of the valve sleeve. The valve sleeve wall and the cross section are two symmetrical C-shaped valve cores connected by the central axis. The medium passage holes on the valve sleeve are connected to the bidirectional fluid channel of the valve body cavity or are closed by the cylindrical surface of the valve core. The central axis is fixedly connected to the plane center of the valve core. The left horizontal push rod (10) is dynamically engaged with the axial holes of the left first and second supports in the left end of the valve body, respectively. The right horizontal push rod (27) is dynamically engaged with the axial holes of the right first and second supports in the right end of the valve body, respectively. The first and second supports have medium passage holes and are connected to the inner cavity of the valve sleeve (2) and the left and right valve body cavities (5) and (22). The two first supports are connected, and the two first supports are symmetrically shaped. The two ends of the first spring are respectively sleeved on the extended end of the valve core shaft and the left horizontal push rod (10) in the shaped cavity of the left first support (14). When the forward flow pressure difference drives the left valve core (1) to move to the left and close the medium passage hole (3) at the left end of the valve sleeve, the right auxiliary handle (28) and the right horizontal push rod (27) are manually pushed against the right extended end of the valve core shaft to achieve locking. Or, when the pressure difference drive fails to close, the right auxiliary handle and the right horizontal push rod are used in an emergency. The push rod pushes against the right extended end of the valve core shaft, pushing the left valve core (1) to the left to achieve closure and locking. The two ends of the second spring (21) are respectively sleeved on the right extended end of the valve core shaft and the right horizontal push rod (27) in the U-shaped cavity of the right first support (30). When the reverse flow pressure difference drives the right valve core (19) to move to the right to close the medium passage (20) at the right end of the valve sleeve, the manual left assist handle (11) and the left horizontal push rod (10) push against the left extended end of the valve core shaft to achieve locking, or in When the differential pressure drive fails to close, the left auxiliary handle and the left horizontal push rod are used to push the left extension end of the valve core shaft to push the right valve core (19) to the right to achieve closure and locking. There are cylinders perpendicular to the horizontal push rods at both ends of the valve body. The inner cavity of the cylinder is in dynamic fit with the slide rod. The lower end of the slide rod is located in the valve body and is hinged to the upper end of the crank. The lower end of the crank is hinged to the horizontal push rod. There is a handle at the upper end of the slide rod. The handle is in dynamic fit with the axial groove on the cylindrical wall and locked fit with the horizontal groove on the cylindrical wall. There are left and right limit blocks on the left and right horizontal push rods on both sides of the crank. The first and second left limit blocks (8) and (9) are rigidly connected to the left horizontal push rod. The first and second right limit blocks (25) and (26) are rigidly connected to the right horizontal push rod. The left and right ends of the valve body are equipped with low power wireless pressure transmitters to display the valve body operating pressure status on site. Battery power is used to transmit the normal operating pressure of the valve body, the burst pressure of the upstream pipeline of the valve body, and the burst pressure of the downstream pipeline of the valve body to the host computer via wireless signal.Simultaneously, an alarm signal for emergency interruption of pipeline rupture is issued. The valve body has a left cavity connecting hole and a right cavity connecting hole at the left and right flange ends, respectively. A connecting valve is located in the middle section of the left and right cavity connecting pipes. Left and right discharge pipes are located at both ends of the connecting valves, respectively. Each discharge pipe has a left cavity discharge valve, a left cavity discharge outlet, a right cavity discharge valve, and a right cavity discharge outlet. One or more valve bodies are installed in series in the upstream and downstream multi-stage pipeline system, either in the same direction or in opposite directions.

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