A new type of self-acting emergency safety shut-off valve

Abstract

The present invention discloses a novel self-acting emergency safety cut-off valve. By providing a shuttle-shaped valve seat and a valve sleeve inside the valve body, when the pressure behind the valve abnormally rises, it can push the piston rod of the cylinder to achieve self-acting rapid safety cut-off, or push the push rod of the electromagnet to achieve manual safety cut-off, or achieve remote safety cut-off through a remote control system, thereby controlling the valve sleeve to quickly cut off and close the valve under the combined action of the medium force and the spring, and the shuttle-shaped valve seat is fixed on the umbrella-shaped grille. In the present invention, a streamlined channel is formed inside the valve body, the closing stroke of the valve sleeve moving to the shuttle-shaped valve seat is short, greatly reducing the pressure loss. Multiple cut-off methods are integrated on the same cut-off valve, ensuring the safety factor of pipeline transportation, improving the applicability of the cut-off valve, effectively enhancing the safety performance of the cut-off safety valve, and enhancing the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of safety cut-off valves, and particularly to a novel self-acting emergency safety cut-off valve. Background Art

[0002] The pressure control system of a natural gas transmission station mainly consists of a safety cut-off valve, a monitoring pressure regulating valve, and a working pressure regulating valve. Under normal circumstances, the safety cut-off valve is in the fully open position, and the downstream pressure is controlled by the working pressure regulating valve. When the working pressure regulating valve fails and the monitoring pressure regulating valve cannot control the downstream pressure, the safety cut-off valve automatically cuts off the gas source to ensure the safety of the downstream pipeline and equipment.

[0003] The cut-off control system of existing safety cut-off valves is generally of a mechanical or electronic structure, among which:

[0004] (1) The mechanical structure has a long closing time, and the electronic structure will be affected by power failure and affect normal operation, with poor safety performance;

[0005] (2) It has a large flow resistance, a slow closing speed, and poor applicability to large-diameter pipelines.

[0006] In view of this, it is urgent to improve the structure of the existing safety cut-off valve to reduce pressure loss and enhance safety performance and applicability. Summary of the Invention

[0007] The technical problem to be solved by the present invention is the large flow resistance, poor safety and applicability of the existing safety cut-off valve.

[0008] To solve the above technical problem, the technical solution adopted by the present invention is to provide a novel self-acting emergency safety cut-off valve, including a valve body assembly, a pneumatic control system, and a remote control system. The valve body assembly is connected to the remote control system through a valve stem. The remote control system is connected to the pneumatic control system through an electromagnet push rod. An umbrella-shaped grid is arranged in the valve body, and a spindle-shaped valve seat is fixed on the umbrella-shaped grid. A valve sleeve is also arranged in the valve body. The valve sleeve moves in the valve body assembly along a guide rod. A spring groove is arranged on the outer side of the valve sleeve, and a spring is embedded in the spring groove. The other end of the spring abuts against the valve body. The bottom end of the spring groove is a hemispherical protrusion, and the plane at the end of the valve stem abuts against the hemispherical protrusion. The top end of the valve stem is fixedly connected to a rotating plate of the pneumatic control system. A cylinder is also arranged on the pneumatic control system. The cylinder is communicated with a pressure regulating valve. The piston rod of the cylinder is connected to a driving plate through a pin shaft. The rotating plate is movably connected to a locking plate through a pin shaft. One end of the locking plate is clamped in a groove at one end of a balance plate, and the other end of the balance plate is slidably connected to the driving plate.

[0009] In the above technical solution, the valve stem has a cam-shaped structure, and its vertical part passes through the valve body and is connected to the rotating plate, and is also connected to the indicator switch of the remote control system.

[0010] In the above technical solution, the valve body is composed of a first-stage valve body, a second-stage valve body, and a third-stage valve body that are sequentially connected and fixed. The umbrella-shaped grille is arranged in the first-stage valve body, one end of the valve sleeve is arranged in the second-stage valve body, and the other end extends into the third-stage valve body.

[0011] In the above technical solution, the pneumatic control system further includes a pressure-regulating spring, and the pressure-regulating spring forms a dynamic balance state with the cylinder through the piston rod.

[0012] In the above technical solution, the remote control system further includes an electromagnet, an electromagnetic push rod, a valve position indication switch, and a remote cut-off signal receiver. The remote cut-off signal receiver commands through a cable. The electromagnet controls the electromagnetic push rod through an attracting action. The valve position indication switch can remotely or directly indicate the valve opening and closing position. The electromagnetic push rod passes through the electromagnet and is connected to the cut-off rod. The cut-off rod is connected to the balance plate through a pin shaft.

[0013] In the above technical solution, the first-stage valve body and the second-stage valve body are fixed by bolts, and the second-stage valve body and the third-stage valve body are fixed by bolts.

[0014] In the above technical solution, the groove at one end of the balance plate in contact with the locking plate is a right-angle groove, and an arc-shaped groove is provided at one end of the balance plate in contact with the driving plate. The right-angle groove and the arc-shaped groove are arranged back to back, and the groove openings face in opposite directions.

[0015] In the above technical solution, a connecting rod is arranged on the balance plate near the right-angle groove, one end of the connecting rod is fixed on the box body of the pneumatic control system, and a separating spring is arranged on the balance plate near the arc-shaped groove.

[0016] In the above technical solution, a limiting boss is arranged in the third-stage valve body and is adapted to the limiting groove arranged on the outer side of the valve sleeve.

[0017] In the above technical solution, a limiting column is further arranged on the box body of the pneumatic control system to limit the rotation angle of the locking plate.

[0018] Compared with the prior art, a novel self-acting emergency safety cut-off valve of the present invention can achieve self-acting rapid safety cut-off by pushing the piston rod of the cylinder when the pressure behind the valve abnormally rises through the spindle-shaped valve seat and valve sleeve arranged in the valve body, or can achieve manual safety cut-off by pushing the push rod of the electromagnet, or can achieve remote safety cut-off through a remote control system, so as to control the valve sleeve to quickly cut off and close the valve under the combined action of the medium force and the spring, and the spindle-shaped valve seat is fixed on the umbrella-shaped grid, so as to form a streamlined channel in the valve body. The closing stroke of the valve sleeve moving to the spindle-shaped valve seat is short, greatly reducing the pressure loss. Multiple cut-off methods are integrated on the same cut-off valve, ensuring the safety factor of pipeline transportation, improving the applicability of the cut-off valve, effectively enhancing the safety performance of the cut-off safety valve, and enhancing the user experience. Description of the Drawings

[0019] Figure 1 It is a cross-sectional view of the novel self-acting emergency safety cut-off valve in the present invention;

[0020] Figure 2 It is a cross-sectional view of the valve body assembly of the novel self-acting emergency safety cut-off valve in the present invention;

[0021] Figure 3 It is a cross-sectional view of the pneumatic control system of the novel self-acting emergency safety cut-off valve in the present invention;

[0022] Figure 4 It is a cross-sectional view of the remote control system of the novel self-acting emergency safety cut-off valve in the present invention;

[0023] Figure 5 It is a cross-sectional view of the tripping and unlocking state of the pneumatic control system of the novel self-acting emergency safety cut-off valve in the present invention.

[0024] Among them, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names in the drawings is as follows:

[0025] 10 Valve body assembly, 20 Pneumatic control system, 30 Remote control system, 11 Valve body, 12 Valve seat, 13 Guide rod, 14 Valve sleeve, 15 Spring, 16 Valve rod, 21 Rotating plate, 22 Locking plate, 23 Balancing plate, 24 Pressure regulating spring, 25 Cutting rod, 26 Piston rod, 27 Cylinder, 28 Driving plate, 31 Valve position indicating switch, 32 Electromagnet, 33 Remote cut-off signal receiver, 34 Electromagnet push rod. Detailed Embodiments

[0026] The present invention provides a novel self-acting emergency safety cut-off valve, which can achieve the effects of reducing pressure loss, improving safety performance and applicability. The following makes a detailed description of the present invention in conjunction with the specification drawings and specific embodiments.

[0027] Such as Figures 1 to 4As shown in the figure, a new type of self-acting emergency safety cut-off valve provided by the present invention includes a valve body assembly 10, a pneumatic control system 20, and a remote control system 30. The valve body assembly 10 is connected to the remote control system 30 through a valve stem 16. The remote control system 30 is connected to the pneumatic control system 20 through an electromagnet 32 push rod 34. An umbrella-shaped grille is arranged inside the valve body 11, and a shuttle-shaped valve seat 12 is fixed on the umbrella-shaped grille. A valve sleeve 14 is also arranged inside the valve body 11. The valve sleeve 14 moves inside the valve body assembly 10 along a guide rod 13. A spring 15 groove is arranged on the outer side of the valve sleeve 14, and a spring 15 is embedded in the spring 15 groove. The other end of the spring 15 abuts against the valve body 11. The bottom end of the spring 15 groove is a hemispherical protrusion. The plane at the end of the valve stem 16 abuts against the hemispherical protrusion. The top end of the valve stem 16 is fixedly connected to a rotating plate 21 of the pneumatic control system 20. A cylinder 27 is also arranged on the pneumatic control system 20. The cylinder 27 is communicated with a pressure regulating valve. The piston rod 26 of the cylinder 27 is connected with a driving plate 28 through a pin shaft. The rotating plate 21 is movably connected with a locking plate 22 through a pin shaft. One end of the locking plate 22 is clamped in a groove at one end of a balance plate 23. The other end of the balance plate 23 is slidably connected with the driving plate 28.

[0028] In this embodiment, through the shuttle-shaped valve seat 12 and the valve sleeve 14 arranged inside the valve body 11, when the pressure behind the valve rises abnormally, the piston rod 26 of the cylinder 27 can be pushed to achieve self-acting rapid safety cut-off, or the electromagnet 32 push rod 34 can be pushed to achieve manual safety cut-off, or remote safety cut-off can be achieved through the remote control system 30, so as to control the valve sleeve 14 to quickly cut off and close the valve under the combined action of the medium force and the spring 15. Moreover, the shuttle-shaped valve seat 12 is fixed on the umbrella-shaped grille, so that a streamlined channel is formed inside the valve body 11. The closing stroke of the valve sleeve 14 moving to the shuttle-shaped valve seat 12 is short, greatly reducing the pressure loss. Multiple cut-off methods are integrated on the same cut-off valve, ensuring the safety factor of pipeline transportation, improving the applicability of the cut-off valve, effectively enhancing the safety performance of the cut-off safety valve, and enhancing the user experience.

[0029] In an embodiment of the present invention, preferably, the valve stem 16 has a cam-shaped structure. Its vertical part passes through the valve body 11 and is connected to the rotating plate 21, and is also connected to the indicator switch of the remote control system 30.

[0030] In this embodiment, the valve sleeve 14 quickly cuts off and closes the valve along the guide rod 13 under the combined push of the medium force and the spring 15. At the same time, the valve stem 16 rotates under the drive of the valve sleeve 14, and the valve stem 16 rotates to control the valve position indicator switch 31 to indicate closed.

[0031] In an embodiment of the present invention, preferably, the valve body 11 is composed of a first-stage valve body 11, a second-stage valve body 11, and a third-stage valve body 11 that are sequentially connected and fixed. The umbrella-shaped grille is arranged inside the first-stage valve body 11. One end of the valve sleeve 14 is arranged inside the second-stage valve body 11, and the other end extends into the third-stage valve body 11.

[0032] In this embodiment, by setting the valve body 11 as a three-stage valve body 11, it is beneficial to the assembly and maintenance of the valve body 11. The umbrella-shaped grille is arranged inside the first-stage valve body 11, the valve seat 12 can be welded and fixed on the umbrella-shaped grille, one end of the valve sleeve 14 is arranged inside the second-stage valve body 11, and the other end extends into the third-stage valve body 11 and moves between the first-stage valve body 11 and the second-stage valve body 11.

[0033] In an embodiment of the present invention, preferably, the pneumatic control system 20 further includes a pressure regulating spring 24. The pressure regulating spring 24 and the cylinder 27 form a dynamically balanced state through the piston rod 26.

[0034] As Figure 3 and Figure 4 shown, in an embodiment of the present invention, preferably, the remote control system 30 further includes an electromagnet 32, an electromagnetic push rod 34, a valve position indicating switch 31, and a remote cut-off signal receiver 33. The remote cut-off signal receiver 33 commands through a cable. The electromagnet 32 controls the electromagnetic push rod 34 through a suction action. The valve position indicating switch 31 can remotely or directly indicate the valve opening and closing position. The electromagnetic push rod 34 passes through the electromagnet 32 and is connected to the cut-off rod 25. The cut-off rod 25 and the balance plate 23 are connected together by a pin shaft.

[0035] In this embodiment, remote safe cut-off can be achieved through the remote cut-off signal receiver 33. After the remote cut-off signal receiver 33 receives the cut-off instruction, it commands the electromagnet 32 to perform a suction action to push the electromagnetic push rod 34. The electromagnetic push rod 34 pushes the balance plate 23. The other end of the balance plate 23 is released, the locking plate 22 jumps up, and the valve sleeve 14 quickly cuts off and closes the valve under the combined action of the medium force and the spring 15 along the guide rod 13.

[0036] In an embodiment of the present invention, preferably, the first-stage valve body 11 and the second-stage valve body 11 are fixed by bolts, and the second-stage valve body 11 and the third-stage valve body 11 are fixed by bolts.

[0037] As Figure 3 shown, in an embodiment of the present invention, preferably, the groove at one end of the balance plate 23 in contact with the locking plate 22 is a right-angle groove, and an arc-shaped groove is provided at one end of the balance plate 23 in contact with the driving plate 28. The right-angle groove and the arc-shaped groove are arranged back to back, and the notch directions are opposite.

[0038] In this embodiment, the groove at one end of the balance plate 23 in contact with the locking plate 22 is a right-angle groove, and the end of the locking plate 22 is clamped on the right-angle groove. The driving plate 28 needs to control the rotation of the balance plate 23, and the end of the balance plate 23 in contact with the driving plate 28 is set as an arc-shaped groove. The end of the driving plate 28 is arc-shaped and is adapted to the arc-shaped groove.

[0039] In an embodiment of the present invention, preferably, a connecting rod is provided on the balance plate 23 near the right-angle groove. One end of the connecting rod is fixed to the box body of the pneumatic control system 20, and a separating spring 15 is provided on the balance plate 23 near the arc-shaped groove.

[0040] In an embodiment of the present invention, preferably, a limiting boss is provided in the third-stage valve body 11 and is adapted to the limiting groove provided on the outer side of the valve sleeve 14.

[0041] In this embodiment, a limiting boss is provided in the third-stage valve body 11, and a limiting groove is provided on the outer side of the valve sleeve 14. When the valve sleeve 14 moves, the stroke of the valve sleeve 14 is limited by the limiting boss.

[0042] In an embodiment of the present invention, preferably, a limiting post is further provided on the box body of the pneumatic control system 20 to limit the rotation angle of the locking plate 22.

[0043] In this embodiment, by further providing a limiting post on the box body of the pneumatic control system 20, the rotation angle of the locking plate 22 is limited when the locking plate 22 and the balance plate 23 bounce directly.

[0044] The working process of the present invention is as follows:

[0045] During normal operation, the new self-acting safety cut-off valve is in the fully open state as Figure 1 and Figure 3 shown. The pneumatic control system 20 is in a balanced locking state. When the pressure behind the valve rises abnormally, the thrust generated by the cylinder 27 is greater than the thrust generated by the pressure regulating spring 24, pushing the piston rod 26 in the direction of the pressure regulating spring 24. The piston rod 26 drives the driving rod to move together. The driving rod pushes the balance plate 23 to one side, the other end of the balance plate 23 is released, the locking plate 22 jumps up, and the valve sleeve 14 is quickly cut off and closed along the guide rod 13 under the combined action of the medium force and the spring 15. At the same time, the valve stem 16 rotates driven by the valve sleeve 14, and the valve position indicating switch 31 indicates closed.

[0046] When the pressure behind the valve drops abnormally, the thrust generated by the cylinder 27 is lower than the thrust generated by the pressure regulating spring 24. The pressure regulating spring 24 pushes the piston rod 26 towards the cylinder 27. The piston rod 26 drives the driving rod to move together. The driving rod pushes the balance plate 23 to one side. The other end of the balance plate 23 becomes unlatched, and the locking plate 22 pops up. The valve sleeve 14 is quickly pushed along the guide rod 13 by the combined action of the medium force and the spring 15 to cut off and close the valve. At the same time, the valve stem 16 rotates driven by the valve sleeve 14, and the valve position indicating switch 31 indicates "closed" when the valve stem 16 rotates. As Figure 5 shown, it is the tripping and unlocking state of the pneumatic control system 20.

[0047] When the pressure behind the valve is normal and emergency cut-off is required on-site, manually push the electromagnetic push rod 34. The electromagnetic push rod 34 pushes the balance plate 23. The other end of the balance plate 23 becomes unlatched, and the locking plate 22 pops up. The valve sleeve 14 is quickly pushed along the guide rod 13 by the combined action of the medium force and the spring 15 to cut off and close the valve. At the same time, the valve stem 16 rotates driven by the valve sleeve 14, and the valve position indicating switch 31 indicates "closed" when the valve stem 16 rotates.

[0048] When the pressure behind the valve is normal and emergency cut-off is required on-site, remote operation can be used to cut off and close. After the remote cut-off signal receiver 33 receives the cut-off instruction, it commands the electromagnet 32 to perform a suction action to push the electromagnetic push rod 34. The electromagnetic push rod 34 pushes the balance plate 23. The other end of the balance plate 23 becomes unlatched, and the locking plate 22 pops up. The valve sleeve 14 is quickly pushed along the guide rod 13 by the combined action of the medium force and the spring 15 to cut off and close the valve. At the same time, the valve stem 16 rotates driven by the valve sleeve 14, and the valve position indicating switch 31 indicates "closed" when the valve stem 16 rotates.

[0049] A new type of self-acting emergency safety cut-off valve of the present invention, by arranging a spindle-shaped valve seat and a valve sleeve in the valve body, when the pressure behind the valve rises abnormally, it can achieve self-acting rapid safety cut-off by pushing the piston rod of the cylinder, or manual safety cut-off can be achieved by pushing the electromagnetic push rod of the electromagnet, or remote safety cut-off can be achieved through the remote control system, so as to control the valve sleeve to quickly cut off and close the valve under the combined action of the medium force and the spring, and the spindle-shaped valve seat is fixed on the umbrella-shaped grid, so that a streamlined channel is formed in the valve body. The closing stroke of the valve sleeve moving to the spindle-shaped valve seat is short, greatly reducing the pressure loss. Multiple cut-off methods are integrated on the same cut-off valve, ensuring the safety factor of pipeline transportation, improving the applicability of the cut-off valve, effectively enhancing the safety performance of the cut-off safety valve, and improving the user experience.

[0050] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "plural" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The present invention is not limited to the above-described best mode. Anyone should know that structural changes made under the inspiration of the present invention, as long as they have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims

1. A new type of self-acting emergency safety shut-off valve, comprising a valve body assembly, a pneumatic control system and a remote control system, characterized in that, It further includes a valve body. The valve body assembly is connected to the remote control system through a valve stem. The remote control system is connected to the pneumatic control system through an electromagnet push rod. An umbrella-shaped grid is arranged inside the valve body. A shuttle-shaped valve seat is fixed on the umbrella-shaped grid. A valve sleeve is also arranged inside the valve body. The valve sleeve moves inside the valve body assembly along a guide rod. A spring groove is arranged on the outer side of the valve sleeve. A spring is embedded in the spring groove. The other end of the spring abuts against the valve body. The bottom end of the spring groove is a hemispherical protrusion. The plane at the end of the valve stem abuts against the hemispherical protrusion. The top end of the valve stem is fixedly connected to the rotating plate of the pneumatic control system. A cylinder is also arranged on the pneumatic control system. The cylinder is communicated with a pressure regulating valve. The piston rod of the cylinder is connected with a driving plate through a pin shaft. The rotating plate is movably connected with a locking plate through a pin shaft. One end of the locking plate is clamped in a groove at one end of the balance plate. The other end of the balance plate is slidably connected with the driving plate; The valve stem has a cam-shaped structure. Its vertical part passes through the valve body and is connected to the rotating plate, and is also connected to the indicator switch of the remote control system; The pneumatic control system further includes a pressure regulating spring. The pressure regulating spring forms a dynamically balanced state with the cylinder through the piston rod.

2. The novel self-acting emergency safety shut-off valve according to claim 1, characterized in that, The remote control system further includes an electromagnet, an electromagnetic push rod, a valve position indicator switch, and a remote cut-off signal receiver. The remote cut-off signal receiver commands through a cable. The electromagnet controls the electromagnetic push rod through a suction action. The valve position indicator switch can remotely or directly indicate the valve opening and closing position. The electromagnetic push rod passes through the electromagnet and is connected to a cut-off rod. The cut-off rod and the balance plate are connected together through a pin shaft.

3. The novel self-acting emergency safety shut-off valve according to claim 1, wherein, The groove at one end of the balance plate in contact with the locking plate is a right-angle groove. An arc-shaped groove is arranged at one end of the balance plate in contact with the driving plate. The right-angle groove and the arc-shaped groove are arranged in opposite directions, and the groove openings face in opposite directions.

4. The novel self-acting emergency safety shut-off valve according to claim 3, characterized in that, A connecting rod is arranged on the balance plate near the right-angle groove. One end of the connecting rod is fixed on the box body of the pneumatic control system. A separating spring is arranged on the balance plate near the arc-shaped groove.

5. The novel self-acting emergency safety shut-off valve according to claim 1, wherein, A limiting column is also arranged on the box body of the pneumatic control system to limit the rotation angle of the locking plate.

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