A dual-channel shut-off valve

Abstract

The present invention discloses a dual-channel shut-off valve, which relates to the technical field of shut-off valves and comprises: an inner tube; a mechanical iris mechanism, which is sleeved on the outer side of the inner tube; the mechanical iris mechanism comprises a shell, a plurality of shut-off pieces and an operating ring; the shell is annular and coaxial with the inner tube; the shut-off pieces are movably arranged inside the shell; the operating ring is rotatably connected to the shell; when the operating ring rotates relative to the shell, it can drive the plurality of shut-off pieces to move in a direction close to the inner tube until they contact the outer wall of the inner tube; an inner tube is arranged inside the shut-off valve, and when shut-off occurs, only the outer space of the inner tube is shut off, while the material inside the inner tube is kept flowing, thereby meeting the use requirements of partial shut-off.

Description

Technical Field

[0001] The present invention belongs to the technical field of cut-off valves, and more particularly, relates to a dual-channel cut-off valve. Background Art

[0002] For long-distance energy transmission pipelines, according to the "Code for the Design of Oil Pipeline Engineering" (GB50253-2014), block valves are required depending on regional levels. When closed, conventional block valves create a solid internal block, blocking all material flow and preventing it from flowing. However, in practice, some specialized energy transmission pipelines require partial blockage, with specific requirements for the blockage method. For example, a block valve may be required to reduce the inner diameter of the pipeline to achieve partial blockage. Traditional block valves cannot meet these requirements. Summary of the Invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art and provide a dual-channel shut-off valve, which has an inner tube inside. When shutting off, only the outer space of the inner tube is cut off, while the material flow inside the inner tube is maintained, meeting the use requirements of partial shut-off.

[0004] In order to achieve the above object, the present invention provides a dual-channel shut-off valve, comprising:

[0005] inner tube;

[0006] A mechanical iris mechanism is sleeved on the outside of the inner tube. The mechanical iris mechanism includes a shell, multiple truncation pieces and an operating ring. The shell is annular and coaxial with the inner tube. The truncation pieces are movably arranged inside the shell. The operating ring is rotatably connected to the shell. When the operating ring rotates relative to the shell, it can drive the multiple truncation pieces to move toward the inner tube until they contact the outer wall of the inner tube.

[0007] Optionally, a receiving groove is provided on one side of the shell, and the receiving groove is open on the side close to the inner tube. The truncation piece is arc-shaped, and one end of the truncation piece is rotatably connected to the bottom of the receiving groove through a first rotating shaft, and a second rotating shaft is provided at the other end of the truncation piece. The operating ring covers the top of the receiving groove, and a plurality of sliding grooves are opened on the side of the operating ring close to the receiving groove, and a plurality of second rotating shafts are respectively slidably provided in the plurality of sliding grooves.

[0008] Optionally, a cover plate is provided on the side of the operating ring away from the shell, the cover plate is annular, an arc-shaped through groove is opened on the operating ring, a sliding rod is slidably provided in the through groove, and both ends of the sliding rod are respectively connected to the shell and the cover plate.

[0009] Optionally, a first connecting tube is provided on the side of the shell away from the cover plate, and a second connecting tube is provided on the side of the cover plate away from the shell. The first connecting tube and the second connecting tube are respectively connected to the inner periphery of the shell and the inner periphery of the cover plate, and the first connecting tube and the second connecting tube are used to connect to the pipeline.

[0010] Optionally, an operating rod is provided on the outer periphery of the operating ring along the radial direction of the operating ring.

[0011] Optionally, a ring gear is provided on the outer circumference of the operating ring, a driving motor is provided on the outer circumference of the housing, a driving gear is provided on the output end of the driving motor, and the driving gear is meshed with the ring gear.

[0012] Optionally, a sealing portion is provided on an edge of one side of the truncation piece close to the inner tube.

[0013] Optionally, the sealing portion is made of rubber.

[0014] Optionally, a plurality of connecting rods are evenly distributed on the outer circumference of the inner tube along the radial direction of the inner tube, and the connecting rods are connected to the inner circumference of the shell or the cover plate.

[0015] Optionally, a bracket is provided inside the inner tube, and the bracket includes an annular piece coaxial with the inner tube, and the outer periphery of the annular piece is connected to the inner periphery of the inner tube through a plurality of connecting pieces.

[0016] The present invention provides a dual-channel cut-off valve, which has the following beneficial effects:

[0017] 1. The shut-off valve is equipped with an inner tube. When shutting off, only the outer space of the inner tube is cut off, while the material inside the inner tube is kept flowing, meeting the use requirements of partial shut-off.

[0018] 2. The shut-off valve uses a mechanical iris mechanism to cut off the outer space of the inner tube, and the opening can be easily adjusted during use;

[0019] 3. The shut-off valve has an electric operation function, which can control the action of the shut-off valve through the cooperation of the drive motor and gear.

[0020] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0022] Figure 1A schematic diagram of the main structure of a dual-channel shut-off valve according to the first embodiment of the present invention is shown.

[0023] Figure 2 A schematic side view of the structure of a dual-channel shut-off valve according to the first embodiment of the present invention is shown.

[0024] Figure 3 A schematic diagram of the internal structure of a dual-channel shut-off valve according to embodiment 1 of the present invention is shown.

[0025] Figure 4 A schematic structural diagram of a housing of a dual-channel shut-off valve according to a first embodiment of the present invention is shown.

[0026] Figure 5 A schematic structural diagram of an operating ring of a dual-channel shut-off valve according to a first embodiment of the present invention is shown.

[0027] Figure 6 A schematic structural diagram of a cut-off piece of a dual-channel cut-off valve according to a first embodiment of the present invention is shown.

[0028] Figure 7 A schematic structural diagram of an operating ring of a dual-channel shut-off valve according to a second embodiment of the present invention is shown.

[0029] Description of reference numerals:

[0030] 1. Inner tube; 2. Shell; 3. Cut-off piece; 4. Operating ring; 5. Accommodating groove; 6. First rotating shaft; 7. Second rotating shaft; 8. Slide groove; 9. Cover plate; 10. Through groove; 11. Slide rod; 12. First connecting tube; 13. Second connecting tube; 14. Operating rod; 15. Connecting rod; 16. Bracket; 17 Annular piece; 18. Connecting piece; 19. Annular gear; 20. Drive motor; 21. Drive gear. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0032] The present invention provides a dual-channel cut-off valve, comprising:

[0033] inner tube;

[0034] The mechanical iris mechanism is sleeved on the outside of the inner tube. The mechanical iris mechanism includes a shell, multiple truncation pieces and an operating ring. The shell is annular and coaxial with the inner tube. The truncation pieces are movably arranged inside the shell. The operating ring is rotatably connected to the shell. When the operating ring rotates relative to the shell, it can drive the multiple truncation pieces to move toward the inner tube until they contact the outer wall of the inner tube.

[0035] Specifically, the shut-off valve is suitable for a delivery pipeline with an inner pipeline that does not need to be cut off. When such a delivery pipeline is in use, only the space outside the inner pipeline needs to be cut off. When the shut-off valve is in use, the inner periphery of the shell is connected to the delivery pipeline, and the inner tube is connected to the inner tube. The operating ring is operated to rotate the operating ring, driving the multiple cut-off pieces to move in the direction close to the inner tube, thereby cutting off the space outside the inner tube of the delivery pipeline. In addition, the shut-off valve uses a mechanical iris mechanism to achieve cut-off, which is convenient for adjusting the opening of the shut-off valve, and can ensure that the fluid on the outer circumference of the inner tube can flow evenly during adjustment. This is of great significance for some special delivery pipelines. Taking the co-transmission pipeline of liquefied natural gas and superconducting energy as an example, a cold insulation medium pipeline is installed inside the liquefied natural gas pipeline. Liquid nitrogen can be used as the cold insulation medium. A superconducting cable is installed inside the cold insulation medium pipeline. Liquefied natural gas and the cold insulation medium are used together as refrigerants for the superconducting cable to realize superconducting power transmission of the superconducting cable. For the above-mentioned co-transmission pipeline, when the opening of the shut-off valve is adjusted, the liquefied natural gas outside the cold insulation medium pipeline is still evenly distributed and flows in the circumference of the cold insulation medium, and uniform heat exchange can still be carried out in the circumference of the cold insulation medium, so that the liquefied natural gas and the cold insulation medium can be used as refrigerants for the superconducting cable at the same time. This has very important progressive significance for the co-transmission of liquefied natural gas and superconducting energy.

[0036] Optionally, a receiving groove is provided on one side of the shell, and the receiving groove is open on the side close to the inner tube. The truncation piece is arc-shaped, and one end of the truncation piece is rotatably connected to the bottom of the receiving groove through a first rotating shaft. A second rotating shaft is provided at the other end of the truncation piece. The operating ring covers the top of the receiving groove, and a plurality of sliding grooves are provided on the side of the operating ring close to the receiving groove, and the plurality of second rotating shafts are respectively slidably provided in the plurality of sliding grooves.

[0037] Specifically, the accommodating groove is annular, and a plurality of first rotating shaft holes are evenly distributed on the bottom of the accommodating groove along its circumferential direction. One end of the plurality of truncation pieces is rotatably connected to the first rotating shaft hole through the first rotating shaft, and the other end of one of the plurality of truncation pieces presses one end of its adjacent truncation piece and is stacked in the accommodating groove in sequence, and the second rotating shaft faces the top of the accommodating groove and slides through the respective sliding grooves; when the operating ring rotates relative to the shell, the sliding groove moves, driving the second rotating shaft to slide in the sliding groove and move relative to the shell, the truncation piece rotates around the first rotating shaft, and the other end of the truncation piece moves toward the direction close to the inner tube, thereby cutting off the space inside the inner circumference of the shell.

[0038] Optionally, a cover plate is provided on the side of the operating ring away from the shell, the cover plate is annular, and an arc-shaped through groove is opened on the operating ring. A sliding rod is slidably provided in the through groove, and both ends of the sliding rod are respectively connected to the shell and the cover plate.

[0039] Specifically, the slide rod can slide along the through groove, the barrel groove serves as a guide groove for the slide rod, the arc center of the arc-shaped through groove is concentric with the operating ring, and the slide rod connects the cover plate and the shell together.

[0040] Optionally, a first connecting pipe is provided on the side of the shell away from the cover plate, and a second connecting pipe is provided on the side of the cover plate away from the shell. The first connecting pipe and the second connecting pipe are respectively connected to the inner periphery of the shell and the inner periphery of the cover plate, and the first connecting pipe and the second connecting pipe are used to connect to the pipeline.

[0041] Specifically, the first connecting pipe and the second connecting pipe are used to connect the shut-off valve to the pipeline, and connecting flanges may be provided on the first connecting pipe and the second connecting pipe.

[0042] Optionally, an operating rod is provided on the outer periphery of the operating ring along the radial direction of the operating ring.

[0043] Specifically, the operating lever can be easily turned by the operator when the operating ring is rotated, thereby saving effort.

[0044] Optionally, a ring gear is provided on the outer periphery of the operating ring, a driving motor is provided on the outer periphery of the shell, a driving gear is provided on the output end of the driving motor, and the driving gear is meshed with the ring gear.

[0045] Specifically, the drive motor drives the drive gear to rotate, and the meshing transmission between the drive gear and the ring gear drives the operating ring to rotate, thereby realizing the electric operation of the shut-off valve.

[0046] Optionally, a sealing portion is provided on an edge of one side of the truncation piece close to the inner tube.

[0047] Specifically, the sealing portion is in contact with the outer wall of the inner tube to improve the cutting effect.

[0048] In one example, a sealing layer is provided on one side of the truncation piece, and the sealing layer is provided between two adjacent truncation pieces. The sealing layer is clamped between the two adjacent truncation pieces to improve the truncation effect.

[0049] Optionally, the sealing portion is made of rubber.

[0050] Optionally, a plurality of connecting rods are evenly distributed on the outer circumference of the inner tube along the radial direction of the inner tube, and the connecting rods are connected to the inner circumference of the shell or the cover plate.

[0051] Specifically, the inner tube is connected to the shell or the cover plate through a connecting rod to ensure that the inner tube is coaxial with the inner circumference of the shell.

[0052] Optionally, a bracket is provided inside the inner tube, and the bracket includes an annular sheet coaxial with the inner tube, and the outer periphery of the annular sheet is connected to the inner periphery of the inner tube through a plurality of connecting sheets.

[0053] Specifically, the bracket can limit the superconducting cable passing through the bracket through its annular piece, keep the superconducting cable in the center of the inner tube, and improve the cooling effect of the superconducting cable.

[0054] Example 1

[0055] like Figures 1 to 6 As shown, the present invention provides a dual-channel shut-off valve, comprising:

[0056] Inner tube 1;

[0057] The mechanical iris mechanism is sleeved on the outside of the inner tube 1. The mechanical iris mechanism includes a shell 2, multiple truncation pieces 3 and an operating ring 4. The shell 2 is annular and coaxial with the inner tube 1. The truncation pieces 3 are movably arranged inside the shell 2. The operating ring 4 is rotatably connected to the shell 2. When the operating ring 4 rotates relative to the shell 2, it can drive the multiple truncation pieces 3 to move toward the direction close to the inner tube 1 until they contact the outer wall of the inner tube 1.

[0058] In this embodiment, a receiving groove 5 is provided on one side of the shell 2, and the receiving groove 5 is open on the side close to the inner tube 1. The truncation piece 3 is arc-shaped, and one end of the truncation piece 3 is rotatably connected to the bottom of the receiving groove 5 through a first rotating shaft 6. A second rotating shaft 7 is provided at the other end of the truncation piece 3. The operating ring 4 covers the top of the receiving groove 5. A plurality of sliding grooves 8 are opened on the side of the operating ring 4 close to the receiving groove 5, and a plurality of second rotating shafts 7 are respectively slidably set in the plurality of sliding grooves 8.

[0059] In this embodiment, a cover plate 9 is provided on the side of the operating ring 4 away from the shell 2. The cover plate 9 is annular and a circular arc-shaped through groove 10 is opened on the operating ring 4. A sliding rod 11 is slidably provided in the through groove 10. The two ends of the sliding rod 11 are respectively connected to the shell 2 and the cover plate 9.

[0060] In this embodiment, a first connecting pipe 12 is provided on the side of the shell 2 away from the cover plate 9, and a second connecting pipe 13 is provided on the side of the cover plate 9 away from the shell 2. The first connecting pipe 12 and the second connecting pipe 13 are respectively connected to the inner periphery of the shell 2 and the inner periphery of the cover plate 9. The first connecting pipe 12 and the second connecting pipe 13 are used to connect to the pipeline.

[0061] In this embodiment, an operating rod 14 is provided on the outer periphery of the operating ring 4 along the radial direction of the operating ring 4 .

[0062] In this embodiment, a sealing portion is provided on an edge of the truncation piece 3 close to the inner tube 1 .

[0063] In this embodiment, the material of the sealing portion is rubber.

[0064] In this embodiment, a plurality of connecting rods 15 are evenly distributed on the outer circumference of the inner tube 1 along the radial direction of the inner tube 1 , and the connecting rods 15 are connected to the inner circumference of the shell 2 or the cover plate 9 .

[0065] In this embodiment, a bracket 16 is provided inside the inner tube 1 . The bracket 16 includes an annular piece 17 coaxial with the inner tube 1 . The outer periphery of the annular piece 17 is connected to the inner periphery of the inner tube 1 via a plurality of connecting pieces 18 .

[0066] In summary, taking the co-transmission pipeline of liquefied natural gas and superconducting energy as an example, the co-transmission pipeline has a cold insulation medium pipeline inside the liquefied natural gas pipeline, and the cold insulation medium can be selected from liquid nitrogen. A superconducting cable is passed through the cold insulation medium pipeline, and liquefied natural gas and the cold insulation medium are used together as the refrigerant of the superconducting cable to realize superconducting power transmission of the superconducting cable; when the co-transmission pipeline is in use, it is sometimes necessary to cut off the transportation of liquefied natural gas. In order not to affect the power transmission of the superconducting cable, the cold insulation medium needs to be continuously supplied. Based on the above-mentioned co-transmission pipeline, when the dual-channel shut-off valve provided by the present invention is used, the shut-off valve is connected to the liquefied natural gas pipeline through the first connecting pipe 12 and the second connecting pipe 13, and at the same time, the inner pipe 1 is connected to the cold insulation medium pipeline, so that the superconducting cable passes through the inner pipe 1. When it is necessary to stop the transportation of liquefied natural gas, the operating lever 14 is pulled and the operating ring 4 is rotated. The slide groove 8 on the operating ring 4 is displaced relative to the second rotating shaft 7. The second rotating shaft 7 slides in the slide groove 8, driving the other end of the truncation piece 3 to move toward the inner tube 1. Through the stacking and simultaneous movement of multiple truncation pieces 3, the distance between the truncation piece 3 and the outer wall of the inner tube 1 is gradually reduced until the sealing portion on the truncation piece 3 contacts the outer wall of the inner tube 1, thereby realizing the cutoff of the transportation of liquefied natural gas.

[0067] Example 2

[0068] like Figure 7 As shown, the main differences between this embodiment and the first embodiment are:

[0069] In this embodiment, a ring gear 19 is provided on the outer periphery of the operating ring 4 , a driving motor 20 is provided on the outer periphery of the housing 2 , a driving gear 21 is provided on the output end of the driving motor 20 , and the driving gear 21 is meshed with the ring gear 19 .

[0070] Specifically, the driving motor 20 drives the driving gear 21 to rotate, and the meshing transmission between the driving gear 21 and the annular gear 19 drives the operating ring 4 to rotate, thereby realizing the electric operation of the shut-off valve.

[0071] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A dual-channel shut-off valve, characterized in that: include: inner tube; a mechanical iris mechanism, sleeved on the outer side of the inner tube, comprising a housing, a plurality of truncation pieces, and an operating ring; the housing is annular and coaxial with the inner tube; the truncation pieces are movably disposed within the housing; the operating ring is rotatably connected to the housing; when the operating ring rotates relative to the housing, it can drive the plurality of truncation pieces to move toward the inner tube until they contact the outer wall of the inner tube; A cover plate is provided on the side of the operating ring away from the housing. The cover plate is annular. A circular arc-shaped through groove is provided on the operating ring. A sliding rod is slidably inserted into the through groove. The two ends of the sliding rod are respectively connected to the housing and the cover plate. A first connecting pipe is provided on a side of the shell away from the cover plate, and a second connecting pipe is provided on a side of the cover plate away from the shell. The first connecting pipe and the second connecting pipe are connected to the inner periphery of the shell and the inner periphery of the cover plate, respectively, and are used to connect to pipelines. A plurality of connecting rods are evenly distributed on the outer circumference of the inner tube along the radial direction of the inner tube, and the connecting rods are connected to the inner circumference of the shell or the cover plate; A bracket is provided inside the inner tube, and the bracket includes an annular sheet coaxial with the inner tube, and the outer periphery of the annular sheet is connected to the inner periphery of the inner tube through a plurality of connecting sheets; The shut-off valve is connected to the liquefied natural gas pipeline through the first connecting pipe and the second connecting pipe. The inner pipe is connected to the cold medium pipeline so that the superconducting cable passes through the inner pipe. The annular piece limits the superconducting cable passing through it.

2. The dual-channel shut-off valve according to claim 1, characterized in that: A receiving groove is provided on one side of the shell, and the receiving groove is open on a side close to the inner tube. The truncation piece is arc-shaped, and one end of the truncation piece is rotatably connected to the bottom of the receiving groove through a first rotating shaft, and a second rotating shaft is provided on the other end of the truncation piece. The operating ring covers the top of the receiving groove, and a plurality of sliding grooves are provided on a side of the operating ring close to the receiving groove, and a plurality of second rotating shafts are respectively slidably provided in the plurality of sliding grooves.

3. The dual-channel shut-off valve according to claim 1, characterized in that: An operating rod is provided on the outer periphery of the operating ring along the radial direction of the operating ring.

4. The dual-channel shut-off valve according to claim 1, characterized in that: An annular gear is provided on the outer periphery of the operating ring, a driving motor is provided on the outer periphery of the housing, a driving gear is provided on the output end of the driving motor, and the driving gear is meshed with the annular gear.

5. The dual-channel shut-off valve according to claim 1, characterized in that: A sealing portion is provided on an edge of one side of the truncation piece close to the inner tube.

6. The dual-channel shut-off valve according to claim 5, characterized in that: The sealing part is made of rubber.

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