A sleeve valve for a steam line

Abstract

This invention relates to the field of fluid control valve technology and discloses a sleeve valve for steam pipelines, including a valve body and an electric mechanism. A valve cover is provided on the top of the valve body, and an air inlet pipe is provided on the valve body. A sleeve is fixedly connected to the inner cavity of the valve body, and a valve core is slidably arranged inside the sleeve. A valve stem is fixedly connected to the top of the valve core. The electric mechanism drives the valve core to rise or fall through the valve stem to determine whether the steam needs to pass through a labyrinth throttling structure for pressure reduction and regulation. By adjusting the axial position of the valve core in the sleeve, the number of times the steam passes through the labyrinth throttling structure can be increased or decreased in a targeted manner, thereby adapting to different pressure values ​​of the steam entering the valve body. This effectively solves the technical problem that the pressure reduction value of the sleeve regulating valve in the prior art is fixed, and it is impossible to dynamically adjust the flow resistance according to the change of steam pressure, thus failing to meet different usage requirements.

Description

Technical Field

[0001] This invention relates to the field of fluid control valve technology, and more specifically to a sleeve valve for a steam pipeline. Background Technology

[0002] A sleeve control valve, or simply a sleeve valve, is a type of valve used to regulate process parameters such as flow rate, pressure, temperature, and liquid level of fluids within pipelines. With the widespread application of thermal power plants, chemical boilers, and steam turbines, steam is frequently used for heating, heat tracing, or direct reaction. This necessitates the construction of steam pipelines and the installation of sleeve control valves on these pipelines to regulate and reduce the pressure of the steam.

[0003] However, in practical applications, the pressure values ​​at different locations in the steam pipeline vary, while the pressure reduction value of the existing sleeve regulating valve is fixed. It cannot dynamically adjust the flow channel resistance according to changes in steam pressure, thus failing to meet diverse application requirements. Specifically, when the steam pressure is low, the fixed flow channel structure of the existing sleeve regulating valve generates significant resistance, resulting in excessively low medium flow velocity, making it difficult to meet the system's discharge efficiency requirements. Conversely, if the flow channel is designed to adapt to low-pressure conditions, insufficient resistance at high pressures can easily lead to excessively high flow velocities and accelerated component wear. Summary of the Invention

[0004] Technical problems to be solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a sleeve valve for steam pipelines, which can effectively solve the technical problem that the reduced pressure value of the sleeve regulating valve in the prior art is fixed, and it is impossible to dynamically adjust the flow resistance according to the change of steam pressure, thus failing to meet different usage requirements.

[0006] Technical solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a sleeve valve for a steam pipeline, comprising a valve body and an electric mechanism. A valve cover is provided on the top of the valve body. A sleeve is fixedly connected to the inner cavity of the valve body. A valve core is slidably disposed within the sleeve. A valve stem is fixedly connected to the top of the valve core. The valve stem passes through the valve cover and slidably seals with the valve cover. The upper end of the valve stem extends out of the valve cover and connects to the electric mechanism. An air inlet pipe is provided on the valve body. A sliding groove is formed on the sleeve. A direct-flow pressure reducing component is provided inside the air inlet pipe. An adjusting cylinder is fixedly connected to the inner cavity of the valve body. A throttling and pressure reducing component and a guiding component are provided inside the inner cavity of the valve body.

[0009] Furthermore, the direct-fire pressure-reducing assembly includes a fixed block and a piston slide plate. The fixed block is sealed and fixedly connected to the intake pipe, and the piston slide plate is sealed and slidably connected to the intake pipe. A pressure sensor is fixedly installed on the side of the fixed block near the piston slide plate. A piston tube is fixedly connected to the side of the piston slide plate near the fixed block. A guide tube is fixedly connected to the side of the fixed block near the piston slide plate. An air inlet is provided on the piston slide plate. A spring is provided inside the guide tube. One end of the spring abuts against the piston slide plate, and the other end of the spring abuts against the pressure sensor. An air inlet chamber is formed between the fixed plate and the piston slide plate.

[0010] Furthermore, the throttling and pressure reducing assembly includes an outlet cylinder body, which is fixedly connected to the inner wall of the regulating cylinder. An outlet pipe is connected to one side of the outlet cylinder body. The outlet pipe passes through the valve body, and the end of the outlet pipe away from the outlet cylinder body is located outside the valve body. Several throttling sections are connected to one side of the outlet cylinder body.

[0011] Furthermore, the throttling section includes a support frame plate, a support plate, a fixing frame, and a connecting plate. One side of the support frame plate is fixedly connected to the inner wall of the regulating cylinder. The other side of the support frame plate is fixedly connected to a labyrinth-type throttling structure and a hollow tube one. The upper side of the labyrinth-type throttling structure is fixedly connected to a vertical tube one. The lower side of the labyrinth-type throttling structure is fixedly connected to a vertical tube two. The lower end of the vertical tube two is fixedly connected to the hollow tube one. One end of the hollow tube one is fixedly connected to the hollow tube two. The side of the hollow tube two away from the hollow tube one is fixedly connected to a hollow tube three. The end of the hollow tube three away from the hollow tube two is fixedly connected to the air outlet cylinder.

[0012] Furthermore, one end of the support plate is fixedly connected to the inner wall of the adjusting cylinder, a guide rail is fixedly connected to the upper surface of the support plate, a sliding plate is slidably connected to the upper surface of the guide rail, a piston plate and a straight rod are fixedly connected to one side of the sliding plate, the end of the piston plate away from the sliding plate is sealed and slidably connected inside the hollow tube, and a ball is rotatably connected to the end of the straight rod away from the sliding plate.

[0013] Furthermore, one end of the fixed frame is fixedly connected to the inner wall of the adjusting cylinder, a threaded rod is rotatably installed on the inner side of the fixed frame, the threaded rod moves through the adjusting cylinder, a gear is fixedly connected to the end of the threaded rod located on the outer side of the adjusting cylinder, a threaded hole is opened on the sliding plate, and the threaded rod is threadedly connected to the sliding plate.

[0014] Furthermore, two connecting plates are provided. One end of each connecting plate is fixedly connected to the inner wall of the adjusting cylinder. A second spring is fixedly connected to the side of each connecting plate that is close to each other. An arc plate is fixedly connected to the side of each of the two springs that is close to each other. The ball can be inserted between the arc convex surfaces of the two arc plates. A vertical plate is fixedly connected to the side of each of the two arc plates that is far from each other. A horizontal plate is fixedly connected to the side of each of the two vertical plates that is far from each other. A piston plate is fixedly connected to the side of each of the two horizontal plates that is close to each other. The side of each of the two piston plates that is close to each other is sealed and slidably connected inside the hollow tube.

[0015] Furthermore, the guiding assembly includes an air guide pipe and a fixing plate. The upper end of the air guide pipe is fixedly connected to the air inlet pipe, and the lower end of the air guide pipe is fixedly connected to a horizontal pipe one. One end of the horizontal pipe one is fixedly connected to a vertical pipe one, and the other end of the horizontal pipe one is fixedly connected to a vertical pipe two. The side of the vertical pipe one away from the horizontal pipe one is fixedly connected to the horizontal pipe two, and the side of the vertical pipe two away from the horizontal pipe one is fixedly connected to a horizontal pipe three. The end of the horizontal pipe two away from the vertical pipe one is fixedly connected to the air outlet cylinder.

[0016] Furthermore, one side of the fixing plate is fixedly connected to the inner wall of the valve body, a telescopic rod is fixedly connected to the lower surface of the fixing plate, a lifting plate is fixedly connected to the lower end of the telescopic rod, a spring is provided between the fixing plate and the lifting plate, a piston rod and a piston rod are fixedly connected to the upper surface of the lifting plate, the upper end of the piston rod is slidably and sealingly connected to the vertical tube, the upper end of the piston rod is slidably and sealingly connected to the vertical tube, a magnetic plate is embedded in the lower surface of the lifting plate, and a venting groove is provided on the piston rod.

[0017] Furthermore, a drive mechanism is connected to one side of the valve core. The drive mechanism includes a vertical rod, a connecting rod is fixedly connected to the lower end of the vertical rod, one end of the connecting rod is fixedly connected to the valve core, the connecting rod passes through a slide groove, a rack is fixedly connected to one side of the connecting rod, a push plate is fixedly connected to the upper end of the vertical rod, and a second magnetic plate is embedded in the upper surface of the push plate. The first magnetic plate and the second magnetic plate are opposite magnetic poles that attract each other.

[0018] Beneficial effects

[0019] The technical solution provided by this invention has the following advantages compared with the prior art:

[0020] 1. A sleeve valve for a steam pipeline according to the present invention, by providing a direct-impact pressure reducing component in the inlet pipe, the steam entering the inlet pipe will first directly impact the piston slide plate, causing the piston tube to slide towards the fixed block and compress the spring. The spring reduces the impact of steam pressure on the valve body before the steam enters the valve body. At the same time, when the spring is compressed, the pressure sensor can detect pressure changes in real time, which facilitates pressure reduction and regulation of steam after it enters the valve body.

[0021] 2. A sleeve valve for a steam pipeline according to the present invention includes a throttling and pressure reducing component and a guiding component in the inner cavity of the valve body. A driving mechanism is connected to one side of the valve core. The electric mechanism drives the valve core to descend through the valve stem, thereby connecting the first transverse pipe to the second transverse pipe through the vent groove. At this time, the second piston rod is still blocked between the first transverse pipe and the third transverse pipe. Steam enters the inner vent cylinder through the first transverse pipe and the second transverse pipe in sequence, and finally flows out through the vent pipe. This realizes that the steam entering the valve body can easily flow out without passing through the labyrinth throttling structure, so as to adapt to low pressure conditions.

[0022] 3. The present invention provides a sleeve valve for a steam pipeline. The electric mechanism drives the valve core to rise or fall through the valve stem to determine whether the steam needs to pass through a labyrinth throttling structure for pressure reduction and regulation. By adjusting the axial position of the valve core in the sleeve, the number of times the steam passes through the labyrinth throttling structure can be increased or decreased, thereby adapting to different pressure values ​​of the steam entering the valve body. This effectively solves the technical problem in the prior art where the pressure reduction value of the sleeve regulating valve is fixed, and the flow resistance cannot be dynamically adjusted according to changes in steam pressure, thus failing to meet different usage requirements. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a front sectional view of a sleeve valve for a steam pipeline according to the present invention;

[0025] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle;

[0026] Figure 3 This is a three-dimensional structural diagram of the connection between the cut-open intake pipe and the direct-flow pressure-reducing assembly of the present invention.

[0027] Figure 4This is a three-dimensional structural diagram of the direct-acting pressure-reducing assembly of the present invention after both the piston tube and the guide tube have been cut open.

[0028] Figure 5 This is a three-dimensional structural diagram of the connection between the cut-open regulating cylinder and the throttling and pressure reducing assembly of the present invention;

[0029] Figure 6 for Figure 5 A magnified structural diagram of section B in the middle;

[0030] Figure 7 This is a three-dimensional structural schematic diagram of the throttling and pressure-reducing component of the present invention;

[0031] Figure 8 for Figure 7 A magnified structural diagram of section C in the middle;

[0032] Figure 9 for Figure 7 A magnified structural diagram of part D in the middle;

[0033] Figure 10 This is a three-dimensional structural diagram of the throttling section of the present invention;

[0034] Figure 11 This is a three-dimensional structural diagram of the hollow tube 2 of the throttling section of the present invention after it has been cut open.

[0035] Figure 12 for Figure 11 A magnified structural diagram of section E in the middle;

[0036] Figure 13 This is a three-dimensional structural diagram of the guide component of the present invention;

[0037] Figure 14 This is a three-dimensional structural diagram of the guide assembly of the present invention after the vertical tube 1 and vertical tube 2 have been cut open.

[0038] Figure 15 A three-dimensional structural diagram showing the connection between the sleeve, valve core, valve stem, and drive mechanism;

[0039] Figure 16 for Figure 15 A magnified structural diagram of section F in the middle;

[0040] The labels in the diagram represent: 1. Valve body; 2. Direct-flow pressure reducing assembly; 3. Adjusting cylinder; 4. Valve cover; 5. Throttling and pressure reducing assembly; 6. Throttling section; 7. Guide assembly; 8. Drive mechanism; 11. Inlet pipe; 12. Sleeve; 13. Valve core; 14. Valve stem; 15. Slide groove; 21. Fixing block; 22. Piston slide plate; 23. Pressure sensor; 24. Piston tube; 25. Guide tube; 26. Inlet port; 27. Spring one; 28. Inlet chamber; 51. Outlet cylinder; 52. Outlet pipe; 61. Support plate; 62. Labyrinth throttling structure; 63. Hollow tube one; 64. Vertical tube one; 65. Vertical tube two; 66. Hollow tube two; 67. Hollow tube three; 68. Support plate; 69. Guide rail; 610. 611. Sliding plate; 612. Piston plate 1; 613. Straight rod; 614. Ball; 615. Fixing frame; 616. Threaded rod; 617. Gear; 618. Connecting plate; 619. Spring 2; 620. Arc plate; 621. Vertical plate; 622. Horizontal plate; 623. Piston plate 2; 71. Air guide pipe; 72. Horizontal pipe 1; 73. Vertical pipe 1; 74. Vertical pipe 2; 75. Horizontal pipe 2; 76. Horizontal pipe 3; 77. Fixing plate; 78. Telescopic rod 1; 79. Lifting plate; 710. Spring 3; 711. Piston rod 1; 712. Piston rod 2; 713. Magnetic plate 1; 81. Vertical rod; 82. Connecting rod; 83. Rack; 84. Push plate; 85. Magnetic plate 2. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0042] The present invention will be further described below with reference to embodiments.

[0043] Please see Figures 1-16 A sleeve valve for a steam pipeline includes a valve body 1 and an electric mechanism (not shown in the figure). A valve cover 4 is provided on the top of the valve body 1, and a sleeve 12 is fixedly connected to the inner cavity of the valve body 1, with the sleeve 12 being vertically arranged. A valve core 13 is slidably arranged inside the sleeve 12, and a valve stem 14 is fixedly connected to the top of the valve core 13. The valve stem 14 passes through the valve cover 4 and slides to seal with the valve cover 4. The upper end of the valve stem 14 extends out of the valve cover 4 and connects to the electric mechanism. An air inlet pipe 11 is provided on the valve body 1, with the inlet end of the air inlet pipe 11 located outside the valve body 1. In this embodiment, a filter screen can be provided inside the air inlet pipe 11 to filter dust and other impurities in the steam. A sliding groove 15 is provided on the sleeve 12, with the sliding groove 15 being vertically arranged.

[0044] A direct-flow pressure-reducing assembly 2 is installed inside the intake pipe 11. An adjusting cylinder 3 is fixedly connected to the inner cavity of the valve body 1, and the top of the adjusting cylinder 3 is open. A throttling and pressure-reducing assembly 5 and a guide assembly 7 are installed inside the inner cavity of the valve body 1.

[0045] The direct-injection pressure reduction assembly 2 includes a fixing block 21, a piston slide plate 22, a pressure sensor 23, a piston tube 24, a guide tube 25, an air inlet 26, a spring 27, and an air inlet chamber 28. The fixing block 21 is sealed and fixedly connected to the air inlet tube 11, and the piston slide plate 22 is sealed and slidably connected to the air inlet tube 11. The pressure sensor 23 is fixedly installed on the side of the fixing block 21 near the piston slide plate 22.

[0046] A piston tube 24 is fixedly connected to the side of the piston slide plate 22 near the fixing block 21, and the piston tube 24 is horizontally positioned. A guide tube 25 is fixedly connected to the side of the fixing block 21 near the piston slide plate 22, and the guide tube 25 is horizontally positioned. The end of the piston tube 24 away from the piston slide plate 22 is sealed and slidably connected inside the guide tube 25, and the pressure sensor 23 is located inside the guide tube 25.

[0047] A spring 27 is installed on the inner side of the guide tube 25. The spring 27 is horizontally positioned, with one end abutting against the piston slide plate 22 and the other end abutting against the pressure sensor 23. The spring 27 is located inside the piston tube 24. The piston slide plate 22 has multiple air inlets 26. An air inlet chamber 28 is formed between the fixing block 21 and the piston slide plate 22. Steam enters the air inlet chamber 28 through the air inlets 26.

[0048] In this embodiment, the pressure sensor 23 transmits the pressure value to the electric mechanism. Based on the pressure value, the electric mechanism drives the valve stem 14 to move axially up and down, thereby determining the position of the valve core 13 within the sleeve 12. The pressure sensor 23 and the electric mechanism can be wirelessly connected. Both the electric mechanism and the pressure sensor 23 are existing devices, and their structures will not be described in detail here. Alternatively, this embodiment may also include a position sensor installed within the sleeve 12 for real-time monitoring of the valve core 13's position within the sleeve 12.

[0049] The throttling and pressure-reducing assembly 5 includes an outlet cylinder 51, an outlet pipe 52, and a throttling section 6. The outlet cylinder 51 is fixedly connected to the inner wall of the regulating cylinder 3, and is vertically arranged with a certain length. An outlet pipe 52 is connected to one side of the outlet cylinder 51. The outlet pipe 52 is arranged horizontally, passes through the valve body 1, and the end of the outlet pipe 52 away from the outlet cylinder 51 is located outside the valve body 1. In this embodiment, a pressure measuring device can also be installed in the outlet pipe 52. The pressure measuring device is used to collect the steam pressure in the outlet pipe 52 and send it to the electric mechanism. The pressure measuring device is existing equipment, and its structure will not be described in detail here.

[0050] A plurality of throttling sections 6 are connected to one side of the air outlet cylinder 51 (three are used as an example in this embodiment). The throttling section 6 includes a support frame plate 61, a labyrinthine throttling structure 62, a hollow tube 1 63, a vertical tube 1 64, a vertical tube 2 65, a hollow tube 2 66, a hollow tube 3 67, a support plate 68, a guide rail 69, a sliding plate 610, a piston plate 1 611, a straight rod 612, a ball 613, a fixing frame 614, a threaded rod 615, a gear 616, a connecting plate 617, a spring 2 618, an arc plate 619, a vertical plate 620, a horizontal plate 621, a piston plate 2 622, and a telescopic rod 2 623.

[0051] One side of the support plate 61 is fixedly connected to the inner wall of the regulating cylinder 3, and the other side of the support plate 61 is fixedly connected to a labyrinth-type throttling structure 62 and a hollow tube 63. The hollow tube 63 is arranged horizontally.

[0052] In this embodiment, the labyrinthine throttling structure 62 can be configured to be composed of multiple coaxially stacked discs, with each disc circumferentially positioned by pins, and a channel for repeated deflection formed between adjacent discs. After the steam undergoes multiple stages of continuous throttling and deflection, the pressure gradually decreases. The labyrinth-type throttling structure 62 can be configured with a pressure ring, a gasket, an isolation plate, a first-stage outer disc, a second-stage outer disc, an isolation disc, a graphite sealing ring, a spiral wound gasket, pins, studs, nuts, and a flange connection. The stacked disc assembly is axially clamped at both ends by the pressure ring and the gasket. The pressure ring fits against the outermost disc, while the gasket helps adjust the axial clearance to ensure that the disc assembly does not loosen after clamping. Subsequently, the labyrinth-type throttling structure 62 is stably connected to the flange connection by the stud and nut through the preset holes in the pressure ring, disc assembly, gasket, and flange connection. The flange connection serves as the connection between the labyrinth-type throttling structure 62 and the external pipeline, ensuring the sealing of the medium transport. At the same time, a graphite sealing ring and a spiral wound gasket are set at the connection between the flange connection and the disc assembly. The graphite sealing ring is suitable for high-temperature conditions, while the spiral wound gasket further compensates for the assembly gap. Through double sealing, high-pressure steam is prevented from leaking from the component connection, avoiding the impact of sealing failure on the pressure reduction effect or damage to the downstream structure. When high-temperature and high-pressure steam enters the internal channel of the labyrinth-type throttling structure 62, it needs to change its flow direction multiple times during the repeated deflection process. Each deflection will achieve initial pressure reduction due to fluid kinetic energy loss. At the same time, the multi-stage discs form continuous throttling nodes, which can continuously reduce the steam pressure.

[0053] A vertical pipe 64 is fixedly connected to the upper side of the labyrinth-type throttling structure 62, and the labyrinth-type throttling structure 62 and the vertical pipe 64 are interconnected. A vertical pipe 65 is fixedly connected to the lower side of the labyrinth-type throttling structure 62, and the labyrinth-type throttling structure 62 and the vertical pipe 65 are interconnected.

[0054] The lower end of vertical tube 2 65 is fixedly connected to hollow tube 1 63, and vertical tube 2 65 and hollow tube 1 63 are interconnected. Hollow tube 2 66 is fixedly connected to one end of hollow tube 1 63. Hollow tube 2 66 is vertically installed, and hollow tube 1 63 and hollow tube 2 66 are interconnected.

[0055] Hollow tube 2 66 is fixedly connected to hollow tube 3 67 on the side away from hollow tube 1 63. Hollow tube 3 67 is arranged horizontally, and hollow tube 2 66 and hollow tube 3 67 are interconnected. The end of hollow tube 3 67 away from hollow tube 2 66 is fixedly connected to the air outlet cylinder 51, and hollow tube 3 67 and air outlet cylinder 51 are interconnected.

[0056] One end of the support plate 68 is fixedly connected to the inner wall of the adjusting cylinder 3. A guide rail 69 is fixedly connected to the upper surface of the support plate 68, and the guide rail 69 is horizontally arranged. A sliding plate 610 is slidably connected to the upper surface of the guide rail 69. A piston plate 611 and a straight rod 612 are fixedly connected to one side of the sliding plate 610. Both the piston plate 611 and the straight rod 612 are horizontally arranged. The end of the piston plate 611 away from the sliding plate 610 is slidably and sealed inside the hollow tube 63. The end of the straight rod 612 away from the sliding plate 610 is rotatably connected to a ball 613, which can rotate.

[0057] One end of the fixed bracket 614 is fixedly connected to the inner wall of the adjusting cylinder 3. A threaded rod 615 is rotatably installed on the inner side of the fixed bracket 614. The threaded rod 615 is horizontally positioned and movably passes through the adjusting cylinder 3. A gear 616 is fixedly connected to the outer end of the threaded rod 615 located in the adjusting cylinder 3. A threaded hole is opened on the sliding plate 610. The threaded rod 615 is threadedly connected to the sliding plate 610. When the threaded rod 615 rotates, it can make the sliding plate 610 move horizontally along the guide rail 69.

[0058] Two connecting plates 617 are provided. The connecting plates 617 are horizontally positioned, and one end of each connecting plate 617 is fixedly connected to the inner wall of the adjusting cylinder 3. A second spring 618 is fixedly connected to the side of each connecting plate 617 that is close to each other. The second spring 618 is vertically positioned. An arc plate 619 is fixedly connected to the side of each second spring 618 that is close to each other. The convex arc surfaces of the two arc plates 619 are positioned opposite each other.

[0059] A telescopic rod 623 is provided on the inner side of the spring 618. The telescopic rod 623 is set vertically. One end of the telescopic rod 623 is fixedly connected to the concave surface of the arc plate 619, and the other end of the telescopic rod 623 is fixedly connected to the connecting plate 617.

[0060] The sphere 613 can be inserted between the convex surfaces of two arc plates 619. A vertical plate 620 is fixedly connected to the side of the two arc plates 619 that is far apart from each other. A horizontal plate 621 is fixedly connected to the side of the two vertical plates 620 that is far apart from each other. A piston plate 622 is fixedly connected to the side of the two horizontal plates 621 that is close to each other. The piston plate 622 is vertically arranged. The ends of the two piston plates 622 that are close to each other are sealed and slidably connected inside the hollow tube 66.

[0061] The guide assembly 7 includes an air guide tube 71, a horizontal tube 1 72, a vertical tube 1 73, a vertical tube 2 74, a horizontal tube 2 75, a horizontal tube 3 76, a fixing plate 77, a telescopic rod 1 78, a lifting plate 79, a spring 3 710, a piston rod 1 711, a piston rod 2 712, and a magnetic plate 1 713.

[0062] The air duct 71 is vertically arranged, and its upper end is fixedly connected to the air inlet pipe 11. The upper port of the air duct 71 is located inside the air inlet chamber 28, and the air duct 71 and the air inlet chamber 28 are interconnected. The lower end of the air duct 71 is fixedly connected to a horizontal pipe 72, and the air duct 71 and the horizontal pipe 72 are interconnected.

[0063] One end of the horizontal pipe 72 is fixedly connected to the vertical pipe 73, and the other end of the horizontal pipe 72 is fixedly connected to the vertical pipe 74. The horizontal pipe 72 and the vertical pipe 73 are interconnected, and the horizontal pipe 72 and the vertical pipe 74 are interconnected.

[0064] A horizontal pipe 75 is fixedly connected to the side of vertical pipe 73 furthest from horizontal pipe 72, and vertical pipe 73 and horizontal pipe 75 are interconnected. A horizontal pipe 76 is fixedly connected to the side of vertical pipe 74 furthest from horizontal pipe 72, and vertical pipe 74 and horizontal pipe 76 are interconnected. The end of horizontal pipe 75 furthest from vertical pipe 73 is fixedly connected to the air outlet cylinder 51, and horizontal pipe 75 and air outlet cylinder 51 are interconnected. The central axis of horizontal pipe 75 is collinear with the central axis of air outlet pipe 52.

[0065] One side of the fixed plate 77 is fixedly connected to the inner wall of the valve body 1. Two telescopic rods 78 are fixedly connected to the lower surface of the fixed plate 77. The telescopic rods 78 are vertically arranged, and a lifting plate 79 is fixedly connected to the lower end of the telescopic rods 78. Two springs 710 are arranged between the fixed plate 77 and the lifting plate 79. The telescopic rods 78 are located inside the springs 710. The springs 710 are vertically arranged, with their upper ends connected to the fixed plate 77 and their lower ends connected to the lifting plate 79. A magnetic plate 713 is embedded in the lower surface of the lifting plate 79.

[0066] Piston rod 1 711 and piston rod 2 712 are fixedly connected to the upper surface of the lifting plate 79. Both piston rod 1 711 and piston rod 2 712 are vertically arranged. The upper end of piston rod 1 711 is sealed and slidably connected inside vertical tube 1 73. The upper end of piston rod 2 712 is sealed and slidably connected inside vertical tube 2 74.

[0067] A venting groove 714 is provided on piston rod 711, and the venting groove 714 is a rectangular groove. The length of piston rod 711 is greater than the length of piston rod 712, and the height of the top of piston rod 711 is greater than the height of the top of piston rod 712. The height of the top of piston rod 712 is greater than the height of the inner top surface of the venting groove 714. Therefore, when piston rod 711 moves downward from its highest point, and when the lower half of the venting groove 714 is located between transverse pipe 72 and transverse pipe 75, steam can flow from transverse pipe 72 into transverse pipe 75 through the lower half of the venting groove 714. At this time, piston rod 712 can also be completely blocked between transverse pipe 72 and transverse pipe 76.

[0068] In this embodiment, three throttling sections 6 are connected end to end. The hollow tube 63 of the upper throttling section 6 is fixedly connected to and communicates with the vertical tube 64 of the lower throttling section 6. The vertical tube 64 of the uppermost throttling section 6 is fixedly connected to and communicates with the horizontal tube 76. In this embodiment, the effect of the three labyrinthine throttling structures 62 in reducing steam pressure may vary.

[0069] A drive mechanism 8 is connected to one side of the valve core 13. The drive mechanism 8 includes a vertical rod 81, a connecting rod 82, a rack 83, a push plate 84, and a second magnetic plate 85. The lower end of the vertical rod 81 is fixedly connected to the connecting rod 82, one end of which is fixedly connected to the valve core 13. The connecting rod 82 passes through the slide groove 15. A rack 83 is fixedly connected to one side of the connecting rod 82, and the rack 83 is vertically arranged. The upper end of the vertical rod 81 is fixedly connected to the push plate 84, and a second magnetic plate 85 is embedded in the upper surface of the push plate 84. The first magnetic plate 813 and the second magnetic plate 85 are opposite magnetic poles and attract each other.

[0070] Working principle and usage process of this invention:

[0071] When steam enters the intake pipe 11, it will first directly impact the piston slide plate 22, causing the piston extension pipe 24 to slide towards the fixed block 21 and compress the spring 27. The spring 27 reduces the impact of steam pressure on the valve body 1 before the steam enters the valve body 1. At the same time, when the spring 27 is compressed, the pressure sensor 23 can detect pressure changes in real time, which facilitates pressure reduction and regulation of steam after it enters the valve body 1.

[0072] The electric mechanism drives the valve core 13 to rise to its highest position via the valve stem 14. The valve core 13 drives the push plate 84 to rise to its highest position, which in turn pushes the lifting plate 79 to its highest position. This causes the telescopic rod 78 to retract to its shortest position, and the spring 710 to be compressed. At this time, the magnetic plate 713 and the magnetic plate 85 magnetically attract each other, causing the push plate 84 and the lifting plate 79 to stick tightly together. The lifting plate 79 drives the piston rod 711 and the piston rod 712 to rise to their highest positions, causing the piston rod 711 to block between the transverse pipe 72 and the transverse pipe 75 (at this time, the vent groove 714 is located on the upper side between the transverse pipe 72 and the transverse pipe 75). This causes the piston rod 712 to block between the transverse pipe 72 and the transverse pipe 76, thus preventing steam from entering the transverse pipe 75 and the transverse pipe 76, thereby achieving the closure of the sleeve valve of the present invention.

[0073] When the sleeve valve of the present invention needs to be opened and the labyrinth throttling structure 62 is not required to reduce the steam pressure, the electric mechanism drives the valve core 13 to descend through the valve stem 14. Due to the tension of the spring three 710 and the magnetic attraction between the magnetic plate one 713 and the magnetic plate two 85, the push plate 84 can drive the lifting plate 79 to descend synchronously. The lifting plate 79 drives the piston rod one 711 and the piston rod two 712 to descend synchronously. When the vent groove 714 is located between the horizontal pipe one 72 and the horizontal pipe two 75, the driving of the valve core 13 to descend stops, thereby connecting the horizontal pipe one 72 with the horizontal pipe two 75 through the vent groove 714. At this time, the piston rod two 712 is still blocked between the horizontal pipe one 72 and the horizontal pipe three 76. The steam enters the gas outlet cylinder 51 through the horizontal pipe one 72 and the horizontal pipe two 75 in sequence, and finally flows out through the gas outlet pipe 52. This realizes that the steam entering the valve body 1 can easily flow out without passing through the labyrinth throttling structure 62, so as to adapt to low pressure conditions.

[0074] When the sleeve valve of the present invention needs to be opened and the labyrinth throttling structure 62 needs to reduce the steam pressure, the electric mechanism drives the valve core 13 to descend via the valve stem 14. Due to the tension of the spring three 710 and the magnetic attraction between the magnetic plate one 713 and the magnetic plate two 85, the push plate 84 can drive the lifting plate 79 to descend synchronously. The lifting plate 79 drives the piston rod one 711 and the piston rod two 712 to descend synchronously. When the telescopic rod one 78 is extended to its longest length, it stops driving the valve core 13 to descend, thereby causing the piston rod one 711 to block between the transverse pipe one 72 and the transverse pipe two 75 (at this time, the vent groove 714 is located on the lower side between the transverse pipe one 72 and the transverse pipe two 75), thereby causing the piston rod two 711 to block between the transverse pipe one 72 and the transverse pipe two 75. 2. The steam descends to the lower side between the first horizontal pipe 72 and the third horizontal pipe 76, thereby connecting the first horizontal pipe 72 with the third horizontal pipe 76 through the second vertical pipe 74. The steam sequentially passes through the first horizontal pipe 72 and the third horizontal pipe 76 into the first vertical pipe 64 of the uppermost throttling section 6. Then, the steam sequentially passes through the labyrinthine throttling structure 62 of the uppermost throttling section 6, the second vertical pipe 65, the first hollow pipe 63, the second hollow pipe 66, and the third hollow pipe 67 into the exhaust cylinder 51, and finally flows out through the exhaust pipe 52. This allows the steam to undergo pressure reduction and regulation through the labyrinthine throttling structure 62. Since the first telescopic rod 78 is extended to its maximum length at this time, the push plate 84 cannot drive the lifting plate 79 to continue descending.

[0075] When the electric mechanism drives the valve core 13 to descend via the valve stem 14, the valve core 13 drives the rack 83 to descend together via the connecting rod 82. As the rack 83 descends, it gradually and smoothly engages with the gear 616 of one of the throttling sections 6, thereby driving the gear 616 to rotate in the forward direction, which in turn causes the threaded rod 615 to rotate in the forward direction. This causes the sliding plate 610 to move away from the hollow tube 63, preventing the piston plate 611 from blocking the connection between the hollow tube 63 of this throttling section 6 and the vertical tube 64 of the other throttling section 6 (this throttling section 6 is located above the other throttling section 6, hence the hollow tube 63 of this throttling section 6 is located above the vertical tube 64 of the other throttling section 6). This causes the sliding plate 610 to drive the ball 613 to move out between the arcuate convex surfaces of the two arcuate plates 619 via the straight rod 612, thereby causing the two arcuate plates 619 to move closer to each other. This causes the two vertical plates 620 to move closer to each other, which in turn causes the two horizontal plates 621 to move closer to each other, which in turn causes the two piston plates 622 to move closer to each other, which in turn causes the two piston plates 622 to press and block one end of each other, thus blocking the hollow tube 63 and the hollow tube 67. This prevents the hollow tube 63 from connecting with the hollow tube 67 through the hollow tube 66, and allows the steam to enter the vertical tube 64 of another throttling section 6 below it from the hollow tube 63 of this throttling section 6 (after the steam flows into the vertical tube 64 of the other throttling section 6, the steam can pass through the labyrinth throttling structure 62, the vertical tube 65, the hollow tube 63, the hollow tube 66, and the hollow tube 67 in sequence to enter the exhaust cylinder 51, and finally flow out from the exhaust pipe 52), thus enabling the steam to pass through a labyrinth throttling structure 62 again for further pressure reduction and regulation.

[0076] When the electric mechanism drives the valve core 13 to rise via the valve stem 14, the valve core 13 drives the rack 83 to rise together via the connecting rod 82. As the rack 83 rises, it gradually and smoothly engages with the gear 616 of one of the throttling sections 6, thereby driving this gear 616 to rotate in the opposite direction, which in turn causes the threaded rod 615 to rotate in the opposite direction, causing the sliding plate 610 to move towards the hollow tube 63. This causes the piston plate 611 to block the connection between the hollow tube 63 of this throttling section 6 and the vertical tube 64 of the other throttling section 6 (this throttling section 6 is located above the other throttling section 6, therefore the hollow tube 63 of this throttling section 6 is located above the vertical tube 64 of the other throttling section 6). This causes the sliding plate 610 to drive the ball 613 to insert between the arcuate convex surfaces of the two arcuate plates 619 via the straight rod 612, thereby causing the two arcuate plates 619 to move away from each other, and causing the two vertical plates 620 to move away from each other. The movement of the two horizontal plates 621 causes them to move further apart, which in turn causes the two piston plates 622 to move further apart. This prevents the ends of the two piston plates 622 from blocking the space between the hollow tube 63 and the hollow tube 67. The hollow tube 63 is then connected to the hollow tube 67 via the hollow tube 66, allowing steam to enter the outlet cylinder 51 through the hollow tube 67 of this throttling section 6. The steam does not need to pass through a labyrinth throttling structure 62 for pressure reduction and regulation again. By adjusting the axial position of the valve core 13 within the sleeve 12, the amount of steam passing through the labyrinth throttling structure 62 can be increased or decreased to adapt to different pressure values ​​of the steam entering the valve body 1. This effectively solves the technical problem in the prior art where the pressure reduction value of the sleeve regulating valve is fixed and the flow resistance cannot be dynamically adjusted according to changes in steam pressure, thus failing to meet different usage requirements.

[0077] In summary, by providing a direct-impact pressure-reducing component 2 inside the intake pipe 11, steam entering the intake pipe 11 will first directly impact the piston slide plate 22, causing the piston extension tube 24 to slide towards the fixed block 21 and compress the spring 27. The spring 27 reduces the impact of steam pressure on the valve body 1 before the steam enters the valve body 1. At the same time, when the spring 27 is compressed, the pressure sensor 23 can detect pressure changes in real time, which facilitates pressure reduction and regulation of steam after it enters the valve body 1. By providing a throttling and pressure reducing component 5 and a guide component 7 in the inner cavity of the valve body 1, and connecting a drive mechanism 8 to one side of the valve core 13, the electric mechanism drives the valve core 13 to descend through the valve stem 14, thereby connecting the first transverse pipe 72 to the second transverse pipe 75 through the vent groove 714. At this time, the second piston rod 712 is still blocked between the first transverse pipe 72 and the third transverse pipe 76. Steam enters the inner outlet cylinder 51 through the first transverse pipe 72 and the second transverse pipe 75 in sequence, and finally flows out through the outlet pipe 52, so that the steam entering the valve body 1 can easily flow out without passing through the labyrinth throttling structure 62, in order to adapt to low pressure working conditions. The electric mechanism drives the valve core 13 to rise or fall via the valve stem 14, determining whether the steam needs to pass through a labyrinth throttling structure 62 again for pressure reduction regulation. By adjusting the axial position of the valve core 13 within the sleeve 12, the number of steam passing through the labyrinth throttling structure 62 can be increased or decreased accordingly, thus adapting to different pressure values ​​of the steam entering the valve body 1. This effectively solves the technical problem in the prior art where the pressure reduction value of the sleeve regulating valve is fixed, and the flow resistance cannot be dynamically adjusted according to changes in steam pressure, failing to meet different usage requirements.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sleeve valve for a steam pipeline, comprising a valve body (1) and an electric mechanism, characterized in that, The valve body (1) is provided with a valve cover (4) at the top and an air inlet pipe (11) on the valve body (1). A sleeve (12) is fixedly connected in the inner cavity of the valve body (1). A valve core (13) is slidably arranged in the sleeve (12). A valve stem (14) is fixedly connected to the top of the valve core (13). The valve stem (14) passes through the valve cover (4) and slides and seals with the valve cover (4). The upper end of the valve stem (14) extends out of the valve cover (4) and is connected to the electric mechanism. A sliding groove (15) is provided on the sleeve (12). The intake pipe (11) is provided with a direct pressure reducing component (2), the valve body (1) is fixedly connected with an adjusting cylinder (3), the valve body (1) is provided with a throttling pressure reducing component (5) and a guide component (7), and a drive mechanism (8) is connected to one side of the valve core (13).

2. A sleeve valve for a steam pipeline according to claim 1, characterized in that, The direct-fire pressure reduction assembly (2) includes a fixed block (21) and a piston slide plate (22). The fixed block (21) is sealed and fixedly connected to the intake pipe (11). The piston slide plate (22) is sealed and slidably connected to the intake pipe (11). A pressure sensor (23) is fixedly installed on the side of the fixed block (21) near the piston slide plate (22). A piston tube (24) is fixedly connected on the side of the piston slide plate (22) near the fixed block (21). A guide tube (25) is fixedly connected on the side of the fixed block (21) near the piston slide plate (22). An air inlet (26) is provided on the piston slide plate (22). A spring (27) is provided on the inner side of the guide tube (25). One end of the spring (27) abuts against the piston slide plate (22), and the other end of the spring (27) abuts against the pressure sensor (23). An air inlet chamber (28) is formed between the fixed block (21) and the piston slide plate (22).

3. A sleeve valve for a steam pipeline according to claim 1, characterized in that, The throttling and pressure reducing assembly (5) includes an outlet cylinder (51), which is fixedly connected to the inner wall of the regulating cylinder (3). An outlet pipe (52) is connected to one side of the outlet cylinder (51). The outlet pipe (52) passes through the valve body (1), and the end of the outlet pipe (52) away from the outlet cylinder (51) is located outside the valve body (1). Several throttling sections (6) are connected to one side of the outlet cylinder (51).

4. A sleeve valve for a steam pipeline according to claim 3, characterized in that, The throttling section (6) includes a support frame plate (61), a support plate (68), a fixing frame (614), and a connecting plate (617). One side of the support frame plate (61) is fixedly connected to the inner wall of the regulating cylinder (3). The other side of the support frame plate (61) is fixedly connected to a labyrinth throttling structure (62) and a hollow tube (63). The upper side of the labyrinth throttling structure (62) is fixedly connected to a vertical tube (64). The lower side of the labyrinth throttling structure (62) is fixedly connected to a vertical tube (65). The lower end of the vertical tube (65) is fixedly connected to the hollow tube (63). One end of the hollow tube (63) is fixedly connected to a hollow tube (66). The side of the hollow tube (66) away from the hollow tube (63) is fixedly connected to a hollow tube (67). The end of the hollow tube (67) away from the hollow tube (66) is fixedly connected to the air outlet cylinder (51).

5. A sleeve valve for a steam pipeline according to claim 4, characterized in that, One end of the support plate (68) is fixedly connected to the inner wall of the adjusting cylinder (3). A guide rail (69) is fixedly connected to the upper surface of the support plate (68). A sliding plate (610) is slidably connected to the upper surface of the guide rail (69). A piston plate (611) and a straight rod (612) are fixedly connected to one side of the sliding plate (610). The end of the piston plate (611) away from the sliding plate (610) is sealed and slidably connected inside the hollow tube (63). A ball (613) is rotatably connected to the end of the straight rod (612) away from the sliding plate (610).

6. A sleeve valve for a steam pipeline according to claim 5, characterized in that, One end of the fixed frame (614) is fixedly connected to the inner wall of the adjusting cylinder (3). A threaded rod (615) is rotatably installed on the inner side of the fixed frame (614). The threaded rod (615) moves through the adjusting cylinder (3). A gear (616) is fixedly connected to one end of the threaded rod (615) located on the outer side of the adjusting cylinder (3). A threaded hole is opened on the sliding plate (610). The threaded rod (615) is threadedly connected to the sliding plate (610).

7. A sleeve valve for a steam pipeline according to claim 5, characterized in that, Two connecting plates (617) are provided. One end of the connecting plate (617) is fixedly connected to the inner wall of the adjusting cylinder (3). A second spring (618) is fixedly connected to the side of the two connecting plates (617) that are close to each other. An arc plate (619) is fixedly connected to the side of the two second springs (618) that are close to each other. The ball (613) can be inserted between the arc convex surfaces of the two arc plates (619). A vertical plate (620) is fixedly connected to the side of the two arc plates (619) that are far from each other. A horizontal plate (621) is fixedly connected to the side of the two vertical plates (620) that are far from each other. A piston plate (622) is fixedly connected to the side of the two horizontal plates (621) that are close to each other. The side of the two piston plates (622) that are close to each other is sealed and slidably connected inside the hollow tube (66).

8. A sleeve valve for a steam pipeline according to claim 7, characterized in that, The guiding assembly (7) includes an air guide pipe (71) and a fixing plate (77). The upper end of the air guide pipe (71) is fixedly connected to the air inlet pipe (11). The lower end of the air guide pipe (71) is fixedly connected to a horizontal pipe (72). One end of the horizontal pipe (72) is fixedly connected to a vertical pipe (73). The other end of the horizontal pipe (72) is fixedly connected to a vertical pipe (74). The side of the vertical pipe (73) away from the horizontal pipe (72) is fixedly connected to a horizontal pipe (75). The side of the vertical pipe (74) away from the horizontal pipe (72) is fixedly connected to a horizontal pipe (76). The end of the horizontal pipe (75) away from the vertical pipe (73) is fixedly connected to the air outlet cylinder (51).

9. A sleeve valve for a steam pipeline according to claim 8, characterized in that, One side of the fixed plate (77) is fixedly connected to the inner wall of the valve body (1). A telescopic rod (78) is fixedly connected to the lower surface of the fixed plate (77). A lifting plate (79) is fixedly connected to the lower end of the telescopic rod (78). A spring (710) is provided between the fixed plate (77) and the lifting plate (79). A piston rod (711) and a piston rod (712) are fixedly connected to the upper surface of the lifting plate (79). The upper end of the piston rod (711) is sealed and slidably connected to the vertical tube (73). The upper end of the piston rod (712) is sealed and slidably connected to the vertical tube (74). A magnetic plate (713) is embedded in the lower surface of the lifting plate (79). A venting groove (714) is provided on the piston rod (711).

10. A sleeve valve for a steam pipeline according to claim 9, characterized in that, The drive mechanism (8) includes a vertical rod (81), the lower end of which is fixedly connected to a connecting rod (82), one end of which is fixedly connected to a valve core (13), the connecting rod (82) passes through a slide groove (15), a rack (83) is fixedly connected to one side of the connecting rod (82), a push plate (84) is fixedly connected to the upper end of the vertical rod (81), and a second magnetic plate (85) is embedded in the upper surface of the push plate (84). The first magnetic plate (713) and the second magnetic plate (85) are opposite magnetic poles that attract each other.

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