Double-valve-plate adjustable gate valve used on steam pipeline

Abstract

The invention belongs to the technical field of valves, particularly relates to a double-valve-plate adjustable gate valve used on a steam pipeline, and aims to overcome the defects that a related pressure detection device is not arranged in a gate valve used in the prior art and the pressure in the gate valve cannot be released in time, the double-valve-plate adjustable gate valve comprises a valve body, and an air inlet end and an air outlet end are arranged on the two sides of the valve body respectively. A lining frame is welded in the valve body, two flowing holes are symmetrically formed in the lining frame, a supporting valve pipe is further fixedly installed at the top of the valve body through bolts, and a valve deck is fixedly installed at the top end of the supporting valve pipe through bolts. After the air pressure reaches the maximum critical value capable of being borne by the valve body, pressure relief can be conducted on the interior of the valve body, the valve body is protected, meanwhile, condensate water existing in the valve body can be conveniently treated, and therefore the valve has good use convenience.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a double-valve-plate adjustable gate valve used on a steam pipeline. Background Art

[0002] In steam pipeline systems, gate valves are critical flow control devices used to regulate and shut off steam flow. Traditional gate valves have several shortcomings in steam pipeline applications. For example, some gate valves have a relatively simple structure, making it difficult to achieve precise control when regulating steam flow, affecting the stability and efficiency of steam delivery. Furthermore, pressure changes within steam pipelines are crucial to the proper operation of gate valves. However, most existing gate valves lack effective pressure monitoring methods and are unable to obtain real-time pipeline pressure data. This results in a delay in taking timely action when pressure anomalies occur, increasing the risk of pipeline system operation.

[0003] In addition, when the steam pipeline is in operation, if the gas pressure inside the gate valve is too high, or even exceeds the maximum critical value that the valve body can withstand, then if the gate valve cannot be quickly relieved of pressure, it is easy to cause damage to the gate valve, which may cause a safety accident. However, the pressure relief function of existing gate valves is not perfect and it is difficult to meet the safety requirements in actual production.

[0004] In view of the above problems, the present invention document proposes a double-valve-plate adjustable gate valve for use on a steam pipeline. Summary of the Invention

[0005] The present invention provides a double-valve plate adjustable gate valve for use on a steam pipeline, which solves the shortcomings of the gate valve used in the prior art that no relevant pressure detection device is provided in the gate valve and the pressure inside the gate valve cannot be relieved in time.

[0006] The present invention provides the following technical solutions:

[0007] A double-valve-plate adjustable gate valve for use on a steam pipeline comprises a valve body, with an air inlet and an air outlet provided on either side of the valve body, a liner frame welded inside the valve body, two flow holes symmetrically provided on the liner frame, a support valve pipe fixedly mounted on the top of the valve body by bolts, and a valve cover fixedly mounted on the top end of the support valve pipe by bolts, and the gate valve further comprises:

[0008] A valve stem mechanism is installed in the supporting valve tube. The bottom end of the valve stem mechanism extends into the valve body and is installed with a movable plate. The movable plate is slidably connected to the inner wall of the valve body. Valve plates are fixedly installed on both sides of the movable plate. The two valve plates are used to block the two flow holes respectively. The top of the valve stem mechanism extends above the valve cover and is connected to the top of the valve cover.

[0009] A pressure measuring mechanism is installed on the top inner wall of the valve body. The pressure measuring mechanism includes a pressure measuring cover that passes through the top inner wall of the valve body and is welded to the top inner wall of the valve body. The pressure measuring cover is equipped with a pressing assembly. A pressure sensor is fixedly installed on the top inner wall of the pressure measuring cover. The pressing assembly cooperates with the pressure sensor.

[0010] In one possible design, the valve stem mechanism includes a screw and a threaded tube, and multiple support rings are welded at equal intervals in the support valve tube. The threaded tubes pass through the multiple support rings and are rotatably connected to the multiple support rings. The screw is welded to the top of the movable plate, and the top of the screw extends into the threaded tube. The screw is threadably connected to the threaded tube, and the top of the threaded tube is also connected to a drive assembly for driving the threaded tube to rotate. The top of the drive assembly passes through the valve cover and extends to above the valve cover, and the drive assembly is connected to the top of the valve cover.

[0011] In one possible design, the drive assembly includes a mounting shaft welded to the top of the threaded tube, the top of the valve cover is fixedly connected to the mounting cover by bolts, a handwheel rod is rotatably connected through the inner wall of one side of the mounting cover, a driving bevel gear is fixedly installed on the handwheel rod by a key connection, and a driven bevel gear is fixedly installed on the top of the mounting shaft by a key connection, and the driving bevel gear is meshed with the driven bevel gear.

[0012] In a possible design, the pressure measuring mechanism further includes a display screen fixedly mounted on one side of the valve body, wherein a processor is embedded in the display screen, and the processor is electrically connected to the pressure sensor.

[0013] In one possible design, a pressure relief end is welded through the inner wall of one side of the valve body, one end of the pressure relief end is connected to a pipe for conveying steam, a mounting ring is welded on the inner wall of the pressure relief end, a docking tube is welded on one side of the mounting ring, a baffle for sealing the docking tube is provided on the opening side of the docking tube, a plurality of moving components are installed at equal intervals on one side of the baffle, one side of the moving component is connected to one side of the mounting ring, and the moving component is electrically connected to the processor.

[0014] In one possible design, the moving assembly includes a support cover fixedly mounted on one side of the mounting ring, a moving rod is slidably connected inside the support cover, one end of the moving rod extends into the pressure relief end and is welded to one side of the baffle, and a tension spring located inside the support cover is sleeved on the moving rod, and both ends of the tension spring are fixedly connected to the other end of the moving rod and the inner wall of the support cover, respectively.

[0015] In one possible design, a first electromagnet is fixedly installed on the inner wall of one side of the support cover by bolts, and a second electromagnet is fixedly installed on the other end of the movable rod. The sides of the first electromagnet and the second electromagnet close to each other are respectively set as the N pole and the S pole, and the first electromagnet and the second electromagnet are both electrically connected to the processor.

[0016] In one possible design, two water covers are symmetrically fixedly installed on the bottom inner wall of the valve body, and the bottom of the water covers extends to the bottom of the valve body. The same U-shaped tube located below the valve body is welded through the inner wall of one side of the two water covers, and a joint is welded through the inner wall of one side of the U-shaped tube, and a sealing plug is sealed in the joint. One side of the sealing plug extends into the U-shaped tube and fits tightly with the inner wall of the U-shaped tube.

[0017] In a possible design, sealing gaskets are installed on the sides of the two valve plates that are away from each other by means of bolts, and the two sealing gaskets are respectively sealed and fitted with the corresponding flow holes.

[0018] When the gate valve needs to be closed, the handwheel rod can be rotated in the opposite direction. According to the above transmission principle, the threaded tube can be rotated in the opposite direction, and the movable plate can be moved downward under the action of the threaded transmission, and the movable plate drives the valve plates on both sides to move downward, blocking the two flow holes and closing the gate valve. When the gate valve is closed, the air pressure in the area connected to the valve body and the air inlet end increases, and the force-bearing plate pushes the pressure rod upward under the action of the air pressure. The pressure rod moves upward and applies pressure to the pressure sensor, and the pressure sensor measures the pressure. The obtained pressure value information is transmitted to the processor in the display screen, and the processor converts the pressure value into a digital signal and transmits it to the display screen, thereby displaying the air pressure value. When the pressure sensor measures that the air pressure in the valve body is too high, the information is transmitted to the processor. The processor determines that the air pressure value has reached a critical state, and the processor cuts off the power to the first electromagnet and the second electromagnet. The attraction between the two disappears, and the limit on the moving rod is released. The elastic force of multiple tension springs pulls the corresponding moving rod to move, and the moving rod drives the baffle away from the docking pipe, so that the docking pipe remains connected. Steam is discharged from the docking pipe, and the pressure inside the valve body is relieved. When the gate valve is used to transport steam, condensed water is formed inside the gate valve and falls into the two water hoods. At this time, the sealing plug is used to seal the joint and block the U-shaped tube to prevent steam from flowing through the U-shaped tube. When the condensed water in the water hood needs to be discharged later, the sealing plug is pulled out from the joint, and the condensed water accumulated in the water hood flows out from the U-shaped tube and the joint, making it convenient to clean the inside of the valve body.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention.

[0020] Beneficial effects: In the present invention, the valve stem mechanism is provided, and the threaded tube can be driven to rotate by operating the driving assembly. At this time, under the action of the threaded transmission with the screw, the movable plate can be driven to move longitudinally. When the movable plate moves upward, the gate valve can be opened to keep the gate valve in a flow state. When the movable plate moves downward, the two flow holes can be blocked by the two valve plates, so that the gate valve can be closed.

[0021] In the present invention, by setting up a pressure measuring mechanism, after the pressure sensor receives the pressure, the measured pressure value information can be transmitted to the processor. Then, under the processing of the processor, the pressure value can be converted into a digital signal and transmitted to the display screen, so that the air pressure value can be displayed on the display screen.

[0022] The present invention can detect the air pressure inside the valve body after the gate valve is closed, and can relieve the pressure inside the valve body after the air pressure reaches the maximum critical value that the valve body can withstand, so as to protect the valve body. At the same time, it can facilitate the treatment of condensed water inside the valve body, so it has good ease of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional schematic diagram of the first-view structure of a double-valve-plate adjustable gate valve for a steam pipeline provided by an embodiment of the present invention;

[0024] Figure 2 A three-dimensional schematic diagram of the structure of a double-valve-plate adjustable gate valve for a steam pipeline provided by an embodiment of the present invention from a second perspective;

[0025] Figure 3 A three-dimensional schematic diagram of the structure of a double-valve-plate adjustable gate valve for a steam pipeline provided by an embodiment of the present invention from a third perspective;

[0026] Figure 4 A three-dimensional schematic diagram of the cross-sectional structure of a supporting valve pipe of a double-valve-plate adjustable gate valve for a steam pipeline provided by an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of a cross-sectional structure of a double-valve plate adjustable gate valve for a steam pipeline provided by an embodiment of the present invention, as viewed from a main perspective;

[0028] Figure 6 A three-dimensional schematic diagram of the connection structure of a handwheel rod, a driving bevel gear, a driven bevel gear, a threaded pipe, a screw, and a movable plate for a double-valve plate adjustable gate valve on a steam pipeline provided by an embodiment of the present invention;

[0029] Figure 7 A three-dimensional schematic diagram of the cross-sectional structure of the pressure relief end of a double-valve plate adjustable gate valve for use on a steam pipeline provided by an embodiment of the present invention;

[0030] Figure 8 A three-dimensional schematic diagram of the cross-sectional structure of a pressure measuring cover of a double-valve-plate adjustable gate valve for a steam pipeline provided by an embodiment of the present invention;

[0031] Figure 9 This is a schematic cross-sectional view of a U-shaped tube, a joint, and a sealing plug of a double-valve plate adjustable gate valve for a steam pipeline provided by an embodiment of the present invention.

[0032] Reference numerals:

[0033] 1. Valve body; 2. Air inlet end; 3. Air outlet end; 4. Liner frame; 5. Moving plate; 6. Valve plate; 7. Sealing gasket; 8. Screw; 9. Threaded pipe; 10. Mounting shaft; 11. Driven bevel gear; 12. Support valve pipe; 13. Support ring; 14. Valve cover; 15. Mounting cover; 16. Handwheel rod; 17. Active bevel gear; 18. Pressure measuring cover; 19. Support ring; 20. Pressure rod; 21. Snap ring; 22. Force plate; 23. Pressure sensor; 24. Display; 25. Pressure relief end; 26. Mounting ring; 27. Docking pipe; 28. Baffle; 29. Support cover; 30. Moving rod; 31. First electromagnet; 32. Second electromagnet; 33. Tension spring; 34. Drain cover; 35. U-shaped pipe; 36. Connector; 37. Sealing plug. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0035] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0036] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0037] Example 1: Reference Figure 1-9 A gate valve includes a valve body 1, an air inlet end 2 and an air outlet end 3 are respectively provided on both sides of the valve body 1, an inner liner frame 4 is welded inside the valve body 1, and two flow holes are symmetrically opened on the inner liner frame 4, the top of the valve body 1 is fixedly installed with a supporting valve pipe 12 by bolts, and the top end of the supporting valve pipe 12 is fixedly installed with a valve cover 14 by bolts.

[0038] The valve stem mechanism is installed in the support valve tube 12, and its specific structure is as follows: multiple support rings 13 are welded at equal intervals in the support valve tube 12, the threaded tubes 9 respectively pass through the multiple support rings 13 and are rotatably connected to the multiple support rings 13, the screw 8 is welded to the top of the movable plate 5, the top end of the screw 8 extends into the threaded tube 9, the screw 8 is threadedly connected to the threaded tube 9, the top end of the threaded tube 9 is connected to the drive assembly, the top end of the drive assembly passes through the valve cover 14 and extends to the top of the valve cover 14, and the drive assembly is connected to the top of the valve cover 14. Among them, the drive assembly includes a mounting shaft 10 welded to the top end of the threaded tube 9, the top end of the valve cover 14 is fixedly connected to the mounting cover 15 by bolts, a handwheel rod 16 is rotatably connected to the inner wall of one side of the mounting cover 15, an active bevel gear 17 is fixedly installed on the handwheel rod 16 by a key connection, the top end of the mounting shaft 10 is fixedly installed on the driven bevel gear 11 by a key connection, and the active bevel gear 17 is meshed with the driven bevel gear 11. During operation, the active bevel gear 17 is driven to rotate by rotating the handwheel rod 16, and the mounting shaft 10 is driven to rotate under the meshing transmission action with the driven bevel gear 11, and then the threaded tube 9 is driven to rotate, and the movable plate 5 is driven to move longitudinally under the threaded transmission action with the screw 8. When the movable plate 5 moves upward, the gate valve is opened to keep the gate valve in a flowing state; when the movable plate 5 moves downward, the two flow holes are blocked by the two valve plates 6 to close the gate valve.

[0039] The movable plate 5 is slidably connected to the inner wall of the valve body 1. Valve plates 6 are fixedly installed on both sides of the movable plate 5 by bolts. The two valve plates 6 are respectively used to seal the two flow holes. Sealing gaskets 7 are installed on the sides of the two valve plates 6 away from each other by bolts. The two sealing gaskets 7 are respectively sealed and fit with the corresponding flow holes. When the movable plate 5 moves downward to use the two valve plates 6 to seal the flow holes, the sealing gaskets 7 can fit tightly with the flow holes to achieve tight sealing of the gate valve.

[0040] The pressure measuring mechanism is mounted on the top inner wall of the valve body 1. It includes a pressure measuring cover 18 that passes through and is welded to the top inner wall of the valve body 1. The pressure measuring cover 18 is equipped with a pressing assembly. A pressure sensor 23 is fixedly mounted on the top inner wall of the pressure measuring cover 18. The pressing assembly cooperates with the pressure sensor 23. The pressing assembly includes a supporting ring 19 welded to the inner wall of the pressure measuring cover 18. A sliding pressure rod 20 passes through the supporting ring 19. The pressure rod 20 is used to apply pressure to the pressure sensor 23. A collar 21 is fixedly sleeved on the pressure rod 20 by welding. The collar 21 is mounted on the supporting ring 19. A force plate 22 is welded to the bottom end of the pressure rod 20. The force plate 22 is tightly and slidingly connected to the inner wall of the pressure measuring cover 18. After the gate valve is closed, the air pressure in the area where the valve body 1 and the air inlet end 2 remain connected increases. The force-bearing plate 22 pushes the pressure rod 20 upward under the action of the air pressure, and the pressure rod 20 applies pressure to the pressure sensor 23, and the pressure sensor 23 is used to detect the air pressure in the valve body 1.

[0041] The pressure measuring mechanism also includes a display screen 24 fixedly mounted on one side of the valve body 1. A processor is embedded in the display screen 24 and electrically connected to the pressure sensor 23. After the pressure sensor 23 receives pressure, it transmits the measured pressure value information to the processor. The processor converts the pressure value into a digital signal and transmits it to the display screen 24, which then displays the air pressure value.

[0042] A pressure relief end 25 is welded through the inner wall of one side of the valve body 1. One end of the pressure relief end 25 is connected to a steam delivery pipe. A mounting ring 26 is welded to the inner wall of the pressure relief end 25. A docking pipe 27 is welded to one side of the mounting ring 26. A baffle 28 for sealing the docking pipe 27 is provided on the open side of the baffle 28. Multiple moving assemblies are evenly spaced on one side of the baffle 28. One side of the moving assembly is connected to one side of the mounting ring 26. The moving assembly is electrically connected to the processor. The moving assembly includes a support cover 29 fixedly mounted on one side of the mounting ring 26. A moving rod 30 is slidably connected within the support cover 29. One end of the moving rod 30 extends into the pressure relief end 25 and is welded to one side of the baffle 28. A tension spring 33 located within the support cover 29 is sleeved on the moving rod 30. The two ends of the tension spring 33 are fixedly connected to the other end of the moving rod 30 and the inner wall of the support cover 29, respectively. A first electromagnet 31 is fixedly installed on the inner wall of one side of the support cover 29 by bolts, and a second electromagnet 32 is fixedly installed on the other end of the moving rod 30. The sides where the first electromagnet 31 and the second electromagnet 32 are close to each other are set as N pole and S pole respectively, and the first electromagnet 31 and the second electromagnet 32 are both electrically connected to the processor. When the pressure sensor 23 is used to measure that the air pressure in the valve body 1 is too high, the processor controls multiple moving components to move. When the air pressure value in the valve body 1 reaches a critical state, the processor cuts off the power to the first electromagnet 31 and the second electromagnet 32. The attraction between the first electromagnet 31 and the second electromagnet 32 disappears, and the limit on the moving rod 30 is released. The moving rod 30 is pulled by the elastic force of the tension spring 33, driving the baffle 28 away from the docking pipe 27, so that the docking pipe 27 remains connected, and the steam is discharged, thereby achieving the purpose of relieving the pressure inside the valve body 1; when the first electromagnet 31 and the second electromagnet 32 remain energized, they attract each other, driving the moving rod 30 to move into the support cover 29, and the baffle 28 is used to seal the docking pipe 27.

[0043] The present application can be used in the field of valve technology, and can also be used in other fields applicable to the present application.

[0044] Example 2: Reference Figure 2 、 4and 9, improvements based on Example 1: a double-valve plate adjustable gate valve for a steam pipe, which is applied to the field of valve technology, wherein two water covers 34 are symmetrically fixedly installed on the bottom inner wall of the valve body 1, and the bottom of the water cover 34 extends to the bottom of the valve body 1, and the same U-shaped tube 35 located below the valve body 1 is welded through the inner wall of one side of the two water covers 34, and a joint 36 is welded through the inner wall of one side of the U-shaped tube 35, and a sealing plug 37 is sealed and inserted in the joint 36, and one side of the sealing plug 37 extends into the U-shaped tube 35 and fits tightly against the inner wall of the U-shaped tube 35. When the gate valve is used to transport steam, condensed water is formed inside the gate valve and falls into the two water covers 34. The joint 36 is sealed with a sealing plug 37, and the U-shaped tube 35 is blocked at the same time to prevent steam from flowing through the U-shaped tube 35. When the condensed water in the water cover 34 needs to be discharged later, the sealing plug 37 is pulled out from the joint 36, and the condensed water accumulated in the water cover 34 can flow out from the U-shaped tube 35 and the joint 36, making it convenient to clean the inside of the valve body 1.

[0045] However, as is well known to those skilled in the art, the working principles and wiring methods of the pressure sensor 23, display screen 24, first electromagnet 31, second electromagnet 32 and processor are commonplace, and are all conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any optional selections according to their needs or convenience.

[0046] The drawings in this application are for illustrative purposes only. The sizes and shapes of the components shown are not intended to be limiting, but are merely for illustrative purposes. In actual implementation, the components may be appropriately configured and adjusted based on specific needs and actual conditions.

[0047] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. The embodiments of the present invention and the features therein can be combined with each other unless there is a conflict. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A double-valve plate adjustable gate valve for use on a steam pipeline, comprising a valve body (1), an air inlet end (2) and an air outlet end (3) being respectively provided on both sides of the valve body (1), an inner liner frame (4) being welded inside the valve body (1), and two flow holes being symmetrically provided on the inner liner frame (4), characterized in that: The top of the valve body (1) is also fixedly mounted with a supporting valve pipe (12) by means of bolts, and the top end of the supporting valve pipe (12) is also fixedly mounted with a valve cover (14) by means of bolts. The gate valve further comprises: A valve stem mechanism is installed in the supporting valve tube (12), the bottom end of the valve stem mechanism extends into the valve body (1) and is installed with a movable plate (5), the movable plate (5) is slidably connected to the inner wall of the valve body (1), valve plates (6) are fixedly installed on both sides of the movable plate (5), the two valve plates (6) are used to block the two flow holes respectively, and the top of the valve stem mechanism extends to the top of the valve cover (14) and is connected to the top of the valve cover (14); A pressure measuring mechanism is installed on the top inner wall of the valve body (1), the pressure measuring mechanism includes a pressure measuring cover (18) that penetrates the top inner wall of the valve body (1) and is welded to the top inner wall of the valve body (1), the pressure measuring cover (18) is installed with a pressing assembly, a pressure sensor (23) is fixedly installed on the top inner wall of the pressure measuring cover (18), and the pressing assembly cooperates with the pressure sensor (23).

2. The double-valve plate adjustable gate valve for steam pipeline according to claim 1, characterized in that: The valve stem mechanism includes a screw (8) and a threaded tube (9), and a plurality of support rings (13) are welded at equal intervals in the support valve tube (12). The threaded tube (9) passes through the plurality of support rings (13) and is rotatably connected to the plurality of support rings (13). The screw (8) is welded to the top of the movable plate (5), and the top end of the screw (8) extends into the threaded tube (9). The screw (8) is threadably connected to the threaded tube (9). The top end of the threaded tube (9) is also connected to a drive assembly for driving the threaded tube (9) to rotate. The top end of the drive assembly passes through the valve cover (14) and extends to the top of the valve cover (14), and the drive assembly is connected to the top of the valve cover (14).

3. The double-valve plate adjustable gate valve for steam pipeline according to claim 2, characterized in that: The drive assembly comprises a mounting shaft (10) welded to the top of a threaded tube (9); a mounting cover (15) is fixedly connected to the top of a valve cover (14) by means of bolts; a handwheel rod (16) is rotatably connected to the inner wall of one side of the mounting cover (15); a driving bevel gear (17) is fixedly mounted on the handwheel rod (16) by means of a key connection; a driven bevel gear (11) is fixedly mounted on the top of the mounting shaft (10) by means of a key connection; and the driving bevel gear (17) is meshed with the driven bevel gear (11).

4. The double-valve plate adjustable gate valve for steam pipeline according to claim 1, characterized in that: The pressing assembly includes a supporting ring (19) welded to the inner wall of the pressure measuring cover (18), a pressure rod (20) is slidably connected through the supporting ring (19), and the pressure rod (20) is used to apply pressure to the pressure sensor (23). A collar (21) is fixedly sleeved on the pressure rod (20) by welding, and the collar (21) is mounted on the supporting ring (19). A force plate (22) is welded to the bottom end of the pressure rod (20), and the force plate (22) is tightly slidably connected to the inner wall of the pressure measuring cover (18).

5. The double-valve plate adjustable gate valve for steam pipeline according to claim 1, characterized in that: The pressure measuring mechanism further comprises a display screen (24) fixedly mounted on one side of the valve body (1), wherein a processor is embedded in the display screen (24), and the processor is electrically connected to the pressure sensor (23).

6. The double-valve plate adjustable gate valve for steam pipeline according to claim 1, characterized in that: A pressure relief end (25) is welded through the inner wall of one side of the valve body (1), one end of the pressure relief end (25) is connected to a steam conveying pipe, a mounting ring (26) is welded on the inner wall of the pressure relief end (25), a butt joint (27) is welded to one side of the mounting ring (26), a baffle (28) for sealing the butt joint (27) is provided on one side of the opening of the butt joint (27), a plurality of moving components are installed at equal intervals on one side of the baffle (28), one side of the moving component is connected to one side of the mounting ring (26), and the moving component is electrically connected to the processor.

7. The double-valve plate adjustable gate valve for steam pipeline according to claim 6, characterized in that: The moving assembly includes a support cover (29) fixedly mounted on one side of the mounting ring (26), a moving rod (30) being slidably connected in the support cover (29), one end of the moving rod (30) extending into the pressure relief end (25) and being welded to one side of the baffle (28), a tension spring (33) located in the support cover (29) being sleeved on the moving rod (30), and two ends of the tension spring (33) being fixedly connected to the other end of the moving rod (30) and the inner wall of the support cover (29), respectively.

8. The double-valve plate adjustable gate valve for steam pipeline according to claim 7, characterized in that: A first electromagnet (31) is fixedly mounted on an inner wall of one side of the support cover (29) by means of bolts, and a second electromagnet (32) is fixedly mounted on the other end of the moving rod (30). The sides of the first electromagnet (31) and the second electromagnet (32) close to each other are respectively set as an N pole and an S pole, and the first electromagnet (31) and the second electromagnet (32) are both electrically connected to the processor.

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