A high temperature check valve for steam system with anti-deformation sealing surface

Abstract

The present invention discloses a high-temperature check valve for a steam system with an anti-deformation sealing surface. The high-temperature check valve comprises a valve body, a flow guide device, a regulating device and an air inlet pipe. The air inlet pipe is connected to the valve body pipeline, the flow guide device is connected to the valve body, the regulating device is connected to the valve body, the regulating device and the flow guide device are transmission-connected, and the flow guide device is used to adjust the flow opening according to the steam intake. The air inlet pipe is used to connect the steam source and introduce the steam into the valve body. The built-in flow guide device performs one-way check to prevent steam backflow. The amount of steam transported by the air inlet pipe is detected in real time by the regulating device, and the flow guide device is controlled to adjust the flow opening in real time according to the detected steam amount. The larger the flow opening, the more steam that passes instantaneously. The flow opening of the flow guide device is automatically adjusted by the regulating device.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature check valves, in particular to a high-temperature check valve for a steam system with an anti-deformation sealing surface. Background Art

[0002] High temperature check valve is generally used in steam system. It is a valve that cuts off the flow path by its own gravity or elastic parts to prevent the backflow of the medium.

[0003] At present, when the high-temperature steam in the steam system is cut off, it will form a backflow, which is easy to impact the sealing surface of the valve body cavity through the valve plate, causing the sealing surface to deform and affecting the continuous service life of the sealing surface. During the use of the existing high-temperature check valve, due to different opening requirements, when the valve plate is opened, a margin will be formed, and the impact of steam on the valve plate is the main force for opening and closing the valve plate. In order to ensure the shut-off quality of the check valve, the valve plate is quickly reset through an elastic member. The elastic support method easily causes the valve plate to swing in a larger range when it is opened, and the accuracy is not high, and it cannot be automatically reset in a short time.

[0004] In addition, when the valve plate is not fully opened, it is impossible to limit the position of the valve plate, and the valve plate is prone to swing along the axis of rotation. The impact caused by the swinging process can easily cause the valve plate to deform, affecting the quality of the valve plate. Summary of the invention

[0005] The object of the present invention is to provide a high-temperature check valve for a steam system with a sealing surface that prevents deformation, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A high-temperature check valve for a steam system with an anti-deformation sealing surface. The high-temperature check valve comprises a valve body, a flow guide device, a regulating device and an air inlet pipe. The air inlet pipe is connected to a valve body pipeline, the flow guide device is connected to the valve body, the regulating device is connected to the valve body, the regulating device and the flow guide device are transmission-connected, and the flow guide device is used to adjust the flow opening according to the steam intake.

[0008] The air inlet pipe is used to connect the steam source and guide the steam into the valve body. The built-in guide device performs one-way check to prevent steam backflow. The amount of steam transported by the air inlet pipe is detected in real time through the regulating device, and the guide device is controlled to adjust the flow opening in real time according to the detected steam amount. The larger the flow opening, the more steam passes through instantly. The flow opening of the guide device is automatically adjusted through the regulating device.

[0009] Furthermore, a check chamber is provided on the valve body, an air inlet is provided on the side of the check chamber close to the air inlet pipe, a transmission groove is provided on the upper side of the check chamber, the flow guiding device comprises a valve plate, a lead screw, a nut and a transmission assembly, the valve plate and the check chamber are rotatably connected, the adjusting device and the lead screw are transmission-connected, the lead screw and the transmission groove are rotatably connected, the nut and the lead screw are threadedly connected, the nut and the transmission groove are slidingly connected, a clamping groove is provided on the nut, the transmission assembly and the clamping groove are movably connected, a valve plate is movably connected at one end of the transmission assembly away from the nut, a limit groove is provided on the valve body, the limit groove is located between the check chamber and the transmission groove, the limit groove is used to limit the transmission assembly, and the transmission assembly is used to limit the valve plate.

[0010] The check chamber serves as the main space for one-way check and is used to install the valve plate. The valve plate rotates on a fixed axis in the check chamber. The air inlet is connected to the air inlet pipe to introduce steam into the check chamber. The rotation angle of the valve plate is the flow opening, which is used to adjust the instantaneous steam passing cross-sectional area. The adjusting device is used to output torque to drive the lead screw to rotate. During the fixed-axis rotation of the lead screw in the transmission groove, the nut is driven to slide along the transmission groove through thread transmission. The transmission component adopts a telescopic structure. The lateral position of the nut drives the transmission component to rotate along the limit groove. The lower end of the transmission component is connected to the valve plate to drive the valve plate to rotate and limit the valve plate at the same time. During the process of adjusting the flow opening, the lead screw can only be driven to rotate by the adjusting device to input the angle. This is the positive input, and the impact force of the steam on the valve plate will produce a reverse input. When the reverse input is generated, since the nut and the lead screw are threadedly connected and the pitch is small, the nut cannot be pushed to move laterally, so that the reverse input is terminated, and the flow opening is adjusted in the form of a unidirectional input. During the adjustment process, it is equivalent to rigidly supporting the valve plate. At the same time, when the steam flows back, the valve plate is stressed through the transmission component to reduce the force between the valve plate and the sealing surface in the check chamber, prevent the sealing surface from deforming, and affect the check quality.

[0011] Furthermore, the transmission assembly includes a sliding rod and a push rod, one end of the sliding rod is connected to the card slot ball joint, a limiting ball is sleeved on the push rod, the limiting ball is placed in the limiting groove, the limiting ball and the limiting groove are rotatably connected, a sliding groove is provided on the push rod, the end of the sliding rod away from the nut is inserted into the sliding groove, the sliding rod and the sliding groove are slidably connected, and the end of the push rod away from the sliding rod is movably connected to the valve plate.

[0012] One end of the sliding rod is connected to the slot with a ball joint, that is, the hinge ball is inserted into the slot so that when the nut slides, the sliding rod can be driven to rotate, and the other end of the sliding rod is inserted into the sliding slot of the push rod, and the push rod is rotationally limited by the limiting ball. The push rod and the sliding rod form a telescopic rod structure. The length of the push rod is fixed, and the relative distance between the nut and the push rod can be adjusted. When the push rod rotates around a fixed axis, the valve plate is driven to rotate, and the push rod rotates and slides along the valve plate, thereby driving the valve plate to rotate and adjust the flow opening.

[0013] Furthermore, an abutment groove is provided on the valve plate, the abutment groove is a "T"-shaped groove, and an axle pin is provided on the side of the abutment rod close to the valve plate. The axle pin is inserted into the abutment groove, and the axle pin and the abutment groove are slidably connected.

[0014] The abutment groove adopts a T-shaped structure, and the bottom end of the abutment rod is inserted into the abutment groove through an axle pin. The axle pin is limited by the T-shaped structure, so that when the abutment rod rotates along a fixed axis, the valve plate is rotated by the axle pin, and the rotation direction of the abutment rod is opposite to that of the valve plate.

[0015] Furthermore, the regulating device includes an induction component, an induction cavity is provided on the upper side of the air inlet, the induction component includes a transmission plate, a connecting rod and a coil, the transmission plate is placed in the air inlet, one side of the transmission plate is tightly connected to the connecting rod, the transmission plate is arranged at an angle, the upper end of the connecting rod is inserted into the induction cavity, the connecting rod and the induction cavity are slidably connected, the coil is placed in the induction cavity, the upper end of the connecting rod is located on the inner side of the coil, and the connecting rod is made of a magnetic material.

[0016] The steam intake is detected by setting up an induction component. The transmission plate is inserted into the air inlet and fixed to the connecting rod. When the air intake pipe transports steam to the air inlet, the transmission plate is tilted to drive the transmission plate to move up. The distance the transmission plate moves up is positively correlated with the steam volume. That is, the more steam there is, the greater the vertical component force generated by the energy conversion through the impact on the transmission plate. When the transmission plate drives the connecting rod to move up, the coil cuts the magnetic flux lines and generates an induced current, which is the steam volume monitoring current.

[0017] Furthermore, the regulating device also includes an regulating motor, the regulating motor and the valve body are tightly connected, the output end of the regulating motor is inserted into the transmission groove, and the output end of the regulating motor is connected to the lead screw transmission.

[0018] The regulating motor is fixed on the valve body and serves as the main power source for the rotation of the valve plate. It is used to output torque and drive the lead screw to rotate, so as to facilitate the adjustment of the flow opening.

[0019] As an optimization, the coil and the regulating motor are electrically connected, and the regulating motor and the air outlet are located on the same side of the check chamber;

[0020] When the steam increases: the output torque of the regulating motor drives the nut to move closer to the regulating motor. The circuit where the coil is located is a monitoring circuit, which is used to monitor the steam volume and transmit the obtained current signal to the controller. The controller controls the current sent to the regulating motor, and automatically adjusts the output torque and torque direction of the regulating motor according to the current signal to improve the steam transmission quality.

[0021] As an optimization, the transmission plate is located at the low end near the non-return chamber. The end of the transmission plate near the air inlet pipe is located at the high end, and the end near the non-return chamber is located at the low end, which is convenient for energy exchange with steam. When the steam hits the transmission plate, it exchanges energy with the transmission plate, generating two components of force vertically upward and along the steam delivery direction, which is convenient for real-time monitoring of the steam volume, so as to adjust the subsequent flow opening.

[0022] As an optimization, an air outlet is provided on the valve body, and the end of the check chamber is connected to the air outlet. After the flow opening is adjusted by the valve plate, the steam enters the check chamber along the valve plate, and enters the air outlet along the check chamber, and is transported to the subsequent stroke. When the steam supply is no longer carried out, the transmission plate moves down under the action of its own weight, and controls the valve plate to close according to the current signal, and seals with the sealing surface of the check chamber.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the adjusting device of the present invention is used to output torque to drive the lead screw to rotate. During the fixed-axis rotation of the lead screw in the transmission groove, the nut is driven to slide along the transmission groove through thread transmission. The transmission component adopts a telescopic structure. The nut is laterally located to drive the transmission component to rotate along the limit groove. The lower end of the transmission component is connected to the valve plate to drive the valve plate to rotate and limit the valve plate at the same time. During the process of adjusting the flow opening, the lead screw can only be driven to rotate by the adjusting device to perform angle input, which is a positive input, and the impact force of steam on the valve plate will generate a reverse input. When the reverse input is generated, since the nut and the lead screw are threadedly connected and the pitch is small, the nut cannot be pushed The lateral movement terminates the reverse input and adjusts the flow opening through the form of unidirectional input. During the adjustment process, it is equivalent to rigidly supporting the valve plate. At the same time, when the steam flows back, the stress of the valve plate is dispersed through the transmission component to reduce the force between the valve plate and the sealing surface in the check chamber, prevent the sealing surface from deforming and affecting the check quality; when the intake pipe conveys steam to the air inlet, the transmission plate is tilted to drive the transmission plate to move up. The distance the transmission plate moves up is positively correlated with the amount of steam, that is, the more steam there is, the greater the vertical component force generated by the energy conversion through the impact on the transmission plate. When the transmission plate drives the connecting rod to move up, the coil cuts the magnetic flux lines and generates an induced current, thereby monitoring the steam amount in real time to facilitate the adjustment of the flow opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2It is a schematic diagram of the transmission assembly structure of the present invention;

[0027] Figure 3 yes Figure 1 A magnified view of a part of the view;

[0028] Figure 4 yes Figure 1 A magnified view of a part B of the view;

[0029] Figure 5 It is a schematic diagram of regulating the flow opening of the valve plate of the present invention;

[0030] Figure 6 yes Figure 5 A partial C magnified view of the view;

[0031] In the figure: 1-valve body, 11-air inlet, 12-sensing chamber, 13-check chamber, 14-transmission groove, 15-limiting groove, 16-air outlet, 2-guiding device, 21-valve plate, 211-abutment groove, 22-screw, 23-nut, 231-slot, 24-transmission assembly, 241-slide rod, 242-abutment rod, 2421-slide groove, 243-limiting ball, 244-axle pin, 3-adjusting device, 31-sensing assembly, 311-transmission plate, 312-connecting rod, 313-coil, 32-adjusting motor, 4-intake pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention provides a technical solution:

[0034] like Figure 1~2 As shown, a high-temperature check valve for a steam system with an anti-deformation sealing surface is provided. The high-temperature check valve comprises a valve body 1, a flow guide device 2, an adjusting device 3 and an air inlet pipe 4. The air inlet pipe 4 is connected to the valve body 1 through a pipeline. The flow guide device 2 is connected to the valve body 1, the adjusting device 3 is connected to the valve body 1, the adjusting device 3 is transmission-connected to the flow guide device 2, and the flow guide device 2 is used to adjust the flow opening according to the steam intake.

[0035] The air inlet pipe 4 is used to connect the steam source and introduce the steam into the valve body 1. The built-in guide device 2 performs a one-way check to prevent steam backflow. The amount of steam delivered by the air inlet pipe 4 is detected in real time by the regulating device 3, and the guide device 2 is controlled to adjust the flow opening in real time according to the detected steam amount. The larger the flow opening, the more steam passes through instantly. The flow opening of the guide device 2 is automatically adjusted by the regulating device 3.

[0036] like Figure 1~2 As shown, a check chamber 13 is provided on the valve body 1, and an air inlet 11 is provided on the side of the check chamber 13 close to the air inlet pipe 4, and a transmission groove 14 is provided on the upper side of the check chamber 13. The flow guide device 2 includes a valve plate 21, a lead screw 22, a nut 23 and a transmission assembly 24. The valve plate 21 is rotatably connected to the check chamber 13, the adjusting device 3 is transmission-connected to the lead screw 22, the lead screw 22 is rotatably connected to the transmission groove 14, the nut 23 is threadedly connected to the lead screw 22, the nut 23 is slidingly connected to the transmission groove 14, a clamping groove 231 is provided on the nut 23, the transmission assembly 24 is movably connected to the clamping groove 231, and the transmission assembly 24 is movably connected to the valve plate 21 at one end away from the nut 23. A limiting groove 15 is provided on the valve body 1, and the limiting groove 15 is located between the check chamber 13 and the transmission groove 14. The limiting groove 15 is used to limit the transmission assembly 24, and the transmission assembly 24 is used to limit the valve plate 21.

[0037] The check chamber 13 is the main space for one-way check, and is used to install the valve plate 21. The valve plate 21 rotates on a fixed axis in the check chamber 13. The air inlet 11 is connected to the air inlet pipe 4 to introduce steam into the check chamber 13. The rotation angle of the valve plate 21 is the flow opening, which is used to adjust the instantaneous steam passing cross-sectional area. The adjusting device 3 is used to output torque to drive the lead screw 22 to rotate. During the fixed-axis rotation of the lead screw 22 in the transmission groove 14, the nut 23 is driven to slide along the transmission groove 14 through threaded transmission. The transmission assembly 24 adopts a telescopic structure. The nut 23 is laterally located to drive the transmission assembly 24 to rotate on a fixed axis along the limit groove 15. The lower end of the transmission assembly 24 is connected to the valve plate 21, which is used to drive the valve plate 21 to rotate and limit the valve plate 21 at the same time. During the flow opening adjustment process, the lead screw 22 can only be driven to rotate by the adjusting device 3 to input the angle. This is Forward input, and the impact force of steam on the valve plate 21 will produce reverse input. When reverse input is generated, since the nut 23 and the screw 22 are threadedly connected, the pitch is small and the nut 23 cannot be pushed to move laterally, so that the reverse input is terminated, and the flow opening is adjusted in the form of unidirectional input. During the adjustment process, it is equivalent to rigidly supporting the valve plate 21. At the same time, when the steam flows back, the transmission assembly 24 disperses the stress of the valve plate 21, thereby reducing the force between the valve plate 21 and the sealing surface in the check chamber 13, preventing the sealing surface from deforming and affecting the check quality.

[0038] like Figures 1 to 4As shown, the transmission assembly 24 includes a sliding rod 241 and a push rod 242. One end of the sliding rod 241 is connected to the card slot 231 with a ball joint. A limiting ball 243 is sleeved on the push rod 242. The limiting ball 243 is placed in the limiting groove 15. The limiting ball 243 and the limiting groove 15 are rotatably connected. A sliding groove 2421 is provided on the push rod 242. The end of the sliding rod 241 away from the nut 23 is inserted into the sliding groove 2421. The sliding rod 241 and the sliding groove 2421 are slidably connected. The end of the push rod 242 away from the sliding rod 241 is movably connected to the valve plate 21.

[0039] One end of the slide rod 241 is connected to the slot 231 by a ball joint, that is, the hinge ball is inserted into the slot 231, so that when the nut 23 slides, the slide rod 241 can be driven to rotate, and the other end of the slide rod 241 is inserted into the slide slot 2421 of the push rod 242, and the push rod 242 is rotationally limited by the limiting ball 243. The push rod 242 and the slide rod 241 constitute a telescopic rod structure. The length of the push rod 242 is fixed, and the relative distance between the nut 23 and the push rod 242 can be adjusted. When the push rod 242 rotates around the fixed axis, the valve plate 21 is driven to rotate, and the push rod 242 rotates and slides along the valve plate 21, thereby driving the valve plate 21 to rotate and adjust the flow opening.

[0040] like Figures 1 to 5 As shown, the valve plate 21 is provided with an abutment groove 211, which is a "T"-shaped groove. The abutment rod 242 is provided with an axle pin 244 on the side close to the valve plate 21. The axle pin 244 is inserted into the abutment groove 211, and the axle pin 244 and the abutment groove 211 are slidably connected.

[0041] The abutment groove 211 adopts a T-shaped structure, and the bottom end of the abutment rod 242 is inserted into the abutment groove 211 through the axle pin 244. The axle pin 244 is limited by the T-shaped structure, so that when the abutment rod 242 rotates around a fixed axis, the valve plate 21 is adjusted to rotate through the axle pin 244, and the rotation direction of the abutment rod 242 is opposite to the rotation direction of the valve plate 21.

[0042] like Figures 5 and 6 As shown, the regulating device 3 includes an induction component 31, and an induction chamber 12 is provided on the upper side of the air inlet 11. The induction component 31 includes a transmission plate 311, a connecting rod 312 and a coil 313. The transmission plate 311 is placed in the air inlet 11, and one side of the transmission plate 311 is fastened to the connecting rod 312. The transmission plate 311 is arranged at an angle, and the upper end of the connecting rod 312 is inserted into the induction chamber 12. The connecting rod 312 and the induction chamber 12 are slidably connected. The coil 313 is placed in the induction chamber 12, and the upper end of the connecting rod 312 is located on the inner side of the coil 313. The connecting rod 312 is made of a magnet.

[0043] The steam intake is detected by setting up the induction component 31, the transmission plate 311 is inserted into the air inlet 11 and fixedly connected to the connecting rod 312. When the air inlet pipe 4 transports steam to the air inlet 11, the transmission plate 311 is tilted to drive the transmission plate 311 to move upward. The upward movement distance of the transmission plate 311 is positively correlated with the steam volume, that is, the more steam volume, the greater the vertical component force generated by the energy conversion by impacting the transmission plate 311. When the transmission plate 311 drives the connecting rod 312 to move upward, the coil 313 cuts the magnetic flux lines and generates an induced current, which is the steam volume monitoring current.

[0044] like Figures 5 and 6 As shown, the regulating device 3 also includes an regulating motor 32 , the regulating motor 32 is firmly connected to the valve body 1 , the output end of the regulating motor 32 is inserted into the transmission groove 14 , and the output end of the regulating motor 32 is transmission-connected to the lead screw 22 .

[0045] The regulating motor 32 is fixed on the valve body 1 and serves as the main power source for the rotation of the valve plate 21. It is used to output torque and drive the lead screw 22 to rotate, so as to facilitate the flow opening adjustment.

[0046] As an optimization, the coil 313 is electrically connected to the regulating motor 32, and the regulating motor 32 and the air outlet 16 are located on the same side of the check chamber 13;

[0047] When the steam increases: the output torque of the regulating motor 32 drives the nut 23 to move closer to the regulating motor 32. The circuit where the coil 313 is located is a monitoring circuit, which is used to monitor the steam volume and transmit the obtained current signal to the controller. The controller controls the current sent to the regulating motor 32, and automatically adjusts the output torque and torque direction of the regulating motor 32 according to the current signal to improve the steam transmission quality.

[0048] As an optimization, the transmission plate 311 is located at the low end near the non-return chamber 13. The end of the transmission plate 311 near the air inlet pipe 4 is located at the high end, and the end near the non-return chamber 13 is located at the low end, which is convenient for energy exchange with steam. When the steam impacts the transmission plate 311, it exchanges energy with the transmission plate 311, generating two components of force vertically upward and along the steam delivery direction, which is convenient for real-time monitoring of the steam volume, so as to adjust the subsequent flow opening.

[0049] As an optimization, the valve body 1 is provided with an air outlet 16, and the end of the check chamber 13 is connected to the air outlet 16. After the flow opening is adjusted by the valve plate 21, the steam enters the check chamber 13 along the valve plate 21, and enters the air outlet 16 along the check chamber 13, and is transported to the subsequent stroke. When the steam supply is no longer carried out, the transmission plate 311 moves down under the action of its own weight, and controls the valve plate 21 to close according to the current signal, and seals with the sealing surface of the check chamber 13.

[0050] The working principle of the present invention is as follows: the adjusting device 3 is used to output torque to drive the lead screw 22 to rotate. During the fixed-axis rotation of the lead screw 22 in the transmission groove 14, the nut 23 is driven to slide along the transmission groove 14 through thread transmission. The transmission component 24 adopts a telescopic structure. The nut 23 is laterally located to drive the transmission component 24 to rotate along the limiting groove 15. The lower end of the transmission component 24 is connected to the valve plate 21 to drive the valve plate 21 to rotate and limit the valve plate 21 at the same time. During the process of adjusting the flow opening, the lead screw 22 can only be driven to rotate by the adjusting device 3 to perform angle input. This is a positive input, and the impact force of steam on the valve plate 21 will produce a reverse input. When the reverse input is generated, since the nut 23 and the lead screw 22 are threadedly connected, the pitch is small and the nut 23 cannot be pushed to move laterally. The reverse input is terminated, and the flow opening is adjusted through the form of unidirectional input. During the adjustment process, it is equivalent to rigidly supporting the valve plate 21. At the same time, when the steam flows back, the valve plate 21 is stressed by the transmission component 24, so as to reduce the force between the valve plate 21 and the sealing surface in the check chamber 13, and prevent the sealing surface from deforming and affecting the check quality; when the intake pipe 4 transports steam to the air inlet 11, the transmission plate 311 is tilted and arranged to drive the transmission plate 311 to move upward. The upward movement distance of the transmission plate 311 is positively correlated with the steam volume, that is, the more steam volume, the greater the vertical component force generated by the energy conversion by impacting the transmission plate 311. When the transmission plate 311 drives the connecting rod 312 to move upward, the coil 313 cuts the magnetic flux lines and generates an induced current, thereby monitoring the steam volume in real time, which is convenient for adjusting the flow opening.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-temperature check valve for a steam system with an anti-deformation sealing surface, characterized in that: The high-temperature check valve comprises a valve body (1), a flow guide device (2), a regulating device (3) and an air inlet pipe (4); the air inlet pipe (4) and the valve body (1) are connected by a pipeline; the flow guide device (2) and the valve body (1) are connected; the regulating device (3) and the valve body (1) are connected; the regulating device (3) and the flow guide device (2) are transmission-connected; and the flow guide device (2) is used to adjust the flow opening according to the steam intake; The valve body (1) is provided with a check chamber (13), a side of the check chamber (13) close to the air inlet pipe (4) is provided with an air inlet port (11), a transmission groove (14) is provided on the upper side of the check chamber (13), the flow guide device (2) comprises a valve plate (21), a lead screw (22), a nut (23) and a transmission assembly (24), the valve plate (21) and the check chamber (13) are rotatably connected, the adjustment device (3) and the lead screw (22) are transmission-connected, the lead screw (22) and the transmission groove (14) are rotatably connected, and the nut (23) and the lead screw (22) are threadedly connected. The nut (23) and the transmission groove (14) are slidably connected, the nut (23) is provided with a slot (231), the transmission assembly (24) and the slot (231) are movably connected, the transmission assembly (24) is provided with a valve plate (21) movably connected at one end away from the nut (23), the valve body (1) is provided with a limit groove (15), the limit groove (15) is located between the check cavity (13) and the transmission groove (14), the limit groove (15) is used to limit the transmission assembly (24), and the transmission assembly (24) is used to limit the valve plate (21); The regulating device (3) comprises an induction component (31), an induction chamber (12) is provided on the upper side of the air inlet (11), the induction component (31) comprises a transmission plate (311), a connecting rod (312) and a coil (313), the transmission plate (311) is placed in the air inlet (11), one side of the transmission plate (311) is tightly connected to the connecting rod (312), the transmission plate (311) is arranged obliquely, the upper end of the connecting rod (312) is inserted into the induction chamber (12), the connecting rod (312) and the induction chamber (12) are slidably connected, the coil (313) is placed in the induction chamber (12), the upper end of the connecting rod (312) is located inside the coil (313), and the connecting rod (312) is made of a magnetic material; The transmission assembly (24) comprises a sliding rod (241) and a supporting rod (242), one end of the sliding rod (241) is connected to the slot (231) by a ball joint, a limiting ball (243) is sleeved on the supporting rod (242), the limiting ball (243) is placed in the limiting slot (15), the limiting ball (243) and the limiting slot (15) are rotatably connected, a sliding groove (2421) is provided on the supporting rod (242), one end of the sliding rod (241) away from the nut (23) is inserted into the sliding groove (2421), the sliding rod (241) and the sliding groove (2421) are slidably connected, and one end of the supporting rod (242) away from the sliding rod (241) is movably connected to the valve plate (21); The valve plate (21) is provided with an abutment groove (211), the abutment groove (211) being a "T"-shaped groove, and the abutment rod (242) is provided with an axle pin (244) on a side close to the valve plate (21), the axle pin (244) being inserted into the abutment groove (211), and the axle pin (244) and the abutment groove (211) being slidably connected.

2. A high-temperature check valve for a steam system with a sealing surface that prevents deformation according to claim 1, characterized in that: The regulating device (3) further comprises an regulating motor (32), wherein the regulating motor (32) and the valve body (1) are tightly connected, the output end of the regulating motor (32) is inserted into the transmission groove (14), and the output end of the regulating motor (32) is transmission-connected to the lead screw (22).

3. A high-temperature check valve for steam system with sealing surface deformation prevention according to claim 2, characterized in that: The coil (313) is electrically connected to the regulating motor (32), and the regulating motor (32) and the air outlet (16) are located on the same side of the check chamber (13); When the steam increases, the regulating motor (32) outputs a torque to drive the nut (23) to move toward the side close to the regulating motor (32).

4. A high-temperature check valve for a steam system with a sealing surface that prevents deformation according to claim 3, characterized in that: The transmission plate (311) is located at a low end on a side close to the non-return chamber (13).

5. A high-temperature check valve for a steam system with a sealing surface that prevents deformation according to claim 4, characterized in that: The valve body (1) is provided with an air outlet (16), and the end of the check chamber (13) is in communication with the air outlet (16).

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