Bypass valve arrangement for a steam turbine system

Abstract

The application discloses a bypass valve device for a steam turbine system and relates to the field of bypass valves, which comprises a bypass valve body, a valve inlet pipe and two water injection pipes are connected to the bypass valve body, a plurality of water injection heads are connected to the water injection pipes, the water injection heads are installed on the bypass valve body, water inlet pipes are connected to the two water injection pipes, and an uninterrupted transfer box is installed on the bypass valve body. It should be noted that in the application, when steam is input into the bypass valve body, the steam is used to push the blades to rotate to achieve preliminary speed reduction, the multiple buffer push plates are used to disperse impact load, the buffer push plates need to overcome elastic resistance when rotating, steam kinetic energy is further consumed, controllable speed reduction is achieved, and the bypass valve body can be fully protected; when the buffer push plates are damaged, steam directly impacts the plates to trigger the transfer inner box to switch, system failure is prevented, and through synchronous driving of two groups of desuperheating water injection heads to alternately work, the problem of long-term use and wear of a single group of nozzles is avoided.

Description

Technical Field

[0001] This invention relates to the field of bypass valve technology, and more particularly to a bypass valve device for a steam turbine system. Background Technology

[0002] Bypass valves are key regulating devices in steam turbine systems. They are used to bypass the turbine and directly introduce steam generated by the boiler into the reheater or condenser during unit start-up, shutdown, or sudden load changes, in order to balance steam flow and protect equipment. During normal operation of the high-pressure heater, the inlet and outlet bypass valves are closed, the high-pressure heater channel is open, and feedwater enters the boiler through the high-pressure heater.

[0003] Turbine bypass valves operate under conditions of high temperature, high pressure, high speed steam medium, and frequent opening and closing with partial opening adjustment. Due to factors such as medium erosion, corrosion, alternating loads, and thermal fatigue, a series of structural and performance problems may occur, leading to a comprehensive deterioration of the bypass valve's regulating performance. For example, internal leakage may prevent the valve from closing completely, erosion and deformation may cause nonlinear flow characteristics, and valve stem jamming may cause regulation lag. Ultimately, this manifests as an inability to stably control the main steam pressure and reheat steam temperature during turbine start-up and shutdown, affecting the safe start-up, shutdown, and normal operation of the unit. In addition, long-term use of a single set of nozzles may lead to a decrease in atomization effect and nozzle deformation due to continuous erosion. This will directly damage the atomization angle and particle size of the desuperheating water, resulting in a series of problems caused by deterioration of the atomization effect, which will ultimately threaten the safe operation of the bypass system. Summary of the Invention

[0004] The purpose of this invention is to provide a bypass valve device for a steam turbine system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A bypass valve device for a steam turbine system includes a bypass valve body, a valve inlet pipe and two water spray pipes connected to the bypass valve body, multiple water spray heads connected to the water spray pipes and the water spray heads mounted on the bypass valve body, water inlet pipes connected to the two water spray pipes, an uninterrupted transfer box mounted on the bypass valve body, and the valve inlet pipe mounted on the uninterrupted transfer box;

[0007] It also includes a buffer and rust prevention device, which is installed inside the uninterrupted transfer box and is used to buffer the steam. The buffer and rust prevention device includes two transfer inner boxes, both of which are movably installed inside the uninterrupted transfer box. An impact shaft is rotatably installed inside the transfer inner box, and multiple buffer push plates are installed on the impact shaft. A buffer push groove is opened on the inner wall of the top side of the transfer inner box, and a blocking push plate is slidably installed in the buffer push groove. The blocking push plate abuts against one of the buffer push plates. A buffer spring is installed on the inner wall of the buffer push groove and is installed on the blocking push plate.

[0008] An uninterrupted switching device is installed inside the uninterrupted transfer box. The uninterrupted switching device is used to switch the buffer and rust prevention device. The uninterrupted switching device includes a switching locking rod, which is movably installed inside the transfer inner box. A switching push plate is movably installed inside the transfer inner box, and the switching push plate is throttle-connected to the switching locking rod.

[0009] Furthermore, in a preferred embodiment of the present invention, the buffer rust prevention device further includes two air outlet funnels, which are respectively installed on the two transfer inner boxes;

[0010] A filter plate is installed inside the transfer box, and the filter plate is located inside the air outlet funnel.

[0011] Furthermore, in a preferred embodiment of the present invention, a switching air intake box is installed on the transfer inner box, and the switching air intake box is connected to the valve inlet pipe;

[0012] A switching outlet box is installed on the outlet funnel, and a transfer pipe is installed on the bottom side of the uninterrupted transfer box. The transfer pipe is installed on the bypass valve, and the switching outlet box is connected to the transfer pipe.

[0013] Furthermore, in a preferred embodiment of the present invention, the uninterrupted switching device further includes a switching box, in which two switching slides are slidably installed, and each of the two transfer inner boxes is equipped with an installation strip, and the transfer inner box is inserted into the switching slide through the installation strip;

[0014] A switching spring is installed on the switching slide, and the switching spring is installed on the inner wall of the switching box.

[0015] Furthermore, in a preferred embodiment of the present invention, a limiting sleeve is installed on the inner wall of the transfer inner box, and a limiting push rod is installed on the switching push plate, the limiting push rod being slidably installed inside the limiting sleeve;

[0016] A push-back spring is installed at one end of the limiting push rod, and the push-back spring is installed on the inner wall of the limiting sleeve.

[0017] Furthermore, in a preferred embodiment of the present invention, a drive push plate is mounted on the switching push plate, and the switching locking rod is movably mounted on the drive push plate;

[0018] A switching locking groove is provided on the top inner wall of the uninterrupted transfer box, and the switching locking rod is inserted into the switching locking groove.

[0019] Furthermore, in a preferred embodiment of the present invention, a drive push hole is provided on the drive push plate, and a switching push shaft is installed on the switching locking rod, the switching push shaft being movably installed in the drive push hole.

[0020] Furthermore, in a preferred embodiment of the present invention, a nozzle switching device is also included. The nozzle switching device is installed on the two water spray pipes, and the water inlet pipe is installed on the nozzle switching device. The nozzle switching device is used to switch the two water spray pipes.

[0021] The nozzle switching device includes a switching water inlet tank, which is installed on the two spray pipes. The water inlet pipes are installed on the switching water inlet tank, and a switching baffle is movably installed inside the switching water inlet tank. The switching baffle is used to close the spray pipes.

[0022] Furthermore, in a preferred embodiment of the present invention, a switching push bar is movably installed on one side of the uninterrupted transfer box, a switching connecting rod is installed on the switching push bar, and the switching connecting rod is installed on the switching blocking frame;

[0023] The switching push bar has two vertical pressure grooves, and a limit frame is movably installed in each of the two vertical pressure grooves. The limit frame is installed on the uninterrupted transfer box. A vertical spring is installed on the inner wall of the vertical pressure groove, and the vertical spring is installed on the limit frame.

[0024] Furthermore, in a preferred embodiment of the present invention, an L-shaped switching plate is slidably installed on the uninterrupted transfer box, and an arc-shaped pusher is installed on the L-shaped switching plate. The L-shaped switching plate pushes the switching pusher to move vertically through the arc-shaped pusher.

[0025] A transverse push rod is installed on the blocking push plate, and the movement of the blocking push plate pushes the L-shaped switching plate to move through the transverse push rod.

[0026] The beneficial effects of the bypass valve device for a steam turbine system proposed in this invention are:

[0027] In this invention, by setting up a buffer anti-rust device, when steam is input into the bypass valve body, the steam directly impacts the buffer push plate to rotate. The buffer push plate rotates in the transfer inner box via an impact shaft, and the rotation of the buffer push plate pushes the blocking push plate to move, so that the blocking push plate slides horizontally in the buffer push groove, and the buffer spring is subjected to force. When multiple buffer push plates rotate, they all need to push the blocking push plate to move and overcome the rebound force of the buffer spring, thereby achieving effective deceleration of the steam. In addition, by setting up multiple rotatable buffer push plates, the corrosion and damage of the buffer push plate by the steam can be dispersed, ensuring the durability of the buffer push plate. Therefore, the steam drives the blade to rotate to achieve initial deceleration, the multiple buffer push plate design disperses the impact load, and the rotation of the buffer push plate needs to overcome elastic resistance, further consuming the steam kinetic energy to achieve controllable deceleration, thereby fully protecting the bypass valve body.

[0028] Furthermore, in this invention, by setting up an uninterrupted switching device, when a buffer push plate is damaged due to long-term use, steam directly passes through the buffer push plate and pushes the switching push plate to move. The movement of the switching push plate drives the drive push plate to move, and the drive push plate drives the switching push shaft to move through the drive push hole. The switching push shaft drives the switching locking rod to disengage from the switching locking groove, thereby unlocking the transfer inner box and the uninterrupted transfer box. At this time, under the pulling force of the switching spring, the two transfer inner boxes move synchronously, realizing the function of automatic switching, continuously decelerating the steam, and preventing system failure.

[0029] Furthermore, in this invention, by setting up a nozzle switching device, when the steam impact buffer push plate rotates, causing the buffer push plate to push the blocking push plate to move, the blocking push plate drives the lateral push rod to move, the lateral push rod drives the L-shaped switching plate to move, the L-shaped switching plate drives the arc-shaped push bar to move, the arc-shaped push bar drives the switching push bar to move, the switching push bar moves downwards and drives the switching connecting rod to move, the switching connecting rod drives the switching blocking frame to move, so that the switching blocking frame exposes one water spray pipe while closing the other water spray pipe; in addition, when the buffer push plate disengages from the blocking push plate, the blocking push plate resets, thereby causing the switching push bar to drive the switching connecting rod to reset, realizing the switching of the two water spray pipes again, realizing the follow-up switching of the water spray pipes, and by synchronously driving the two sets of desuperheating water nozzles to work alternately, the problem of wear and tear of a single set of nozzles after long-term use is avoided. Attached Figure Description

[0030] Figure 1 A three-dimensional structural schematic diagram of a bypass valve device for a steam turbine system provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of an uninterrupted transfer box for a bypass valve device used in a steam turbine system, provided in an embodiment of the present invention.

[0032] Figure 3This is a partial structural diagram illustrating the connection between the transfer inner box and the switching linkage of a bypass valve device for a steam turbine system, as provided in an embodiment of the present invention.

[0033] Figure 4 This is a schematic diagram illustrating the connection between the intermediate inner box and the switching intake box of a bypass valve device for a steam turbine system, as provided in an embodiment of the present invention.

[0034] Figure 5 This is a partial cross-sectional view of the connection between the buffer push plate and the blocking push plate of a bypass valve device for a steam turbine system, provided in an embodiment of the present invention.

[0035] Figure 6 This is a partial cross-sectional view of the connection between the switching locking rod and the drive push plate of a bypass valve device for a steam turbine system, as provided in an embodiment of the present invention.

[0036] Figure 7 This is a partial structural diagram of the connection between the switching locking rod and the switching push plate of a bypass valve device for a steam turbine system, provided in an embodiment of the present invention.

[0037] Figure 8 This is a schematic diagram of the connection between the limiting push rod and the limiting sleeve of a bypass valve device for a steam turbine system, provided in an embodiment of the present invention.

[0038] Figure 9 This is a schematic diagram illustrating the connection between the switching box and the switching slide of a bypass valve device for a steam turbine system, as provided in an embodiment of the present invention.

[0039] Figure 10 This is a partial cross-sectional view of the connection between the switching pusher and the limiting frame of a bypass valve device for a steam turbine system, as provided in an embodiment of the present invention.

[0040] Figure 11 This is a partial cross-sectional view of the connection between the switching inlet tank and the switching baffle of a bypass valve device for a steam turbine system, as provided in an embodiment of the present invention.

[0041] In the diagram: 1-Bypass valve body; 2-Valve inlet pipe; 3-Spray head; 4-Spray pipe; 5-Inlet pipe; 6-Uninterrupted transfer box; 7-Buffer and rust prevention device; 701-Inner transfer box; 702-Impact shaft; 703-Buffer push plate; 704-Blocking push plate; 705-Buffer push groove; 706-Buffer spring; 707-Filter plate; 708-Transfer pipe; 709-Outlet funnel; 710-Switching inlet box; 711-Switching outlet box; 8-Uninterrupted switching device; 801-Switching locking rod; 802-Switching locking groove; 803-Switching push plate ; 804-Drive push plate; 805-Switching push shaft; 806-Restricting push rod; 807-Restricting sleeve; 808-Push-back spring; 809-Drive push hole; 810-Switching box; 811-Switching slide; 812-Installation strip; 813-Switching spring; 9-Nozzle switching device; 901-Switching water inlet tank; 902-Switching blocking frame; 903-Switching connecting rod; 904-Switching push bar; 905-Vertical pressure groove; 906-Limiting frame; 907-Vertical spring; 908-Horizontal push rod; 909-L-shaped switching plate; 910-Arc-shaped push bar. Detailed Implementation

[0042] 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 embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] Furthermore, in the description of this invention, it should be noted that the term "inner" indicates the positional relationship based on the positional relationship shown in the accompanying drawings, or the positional relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the invention.

[0046] Furthermore, in the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] Please refer to the attached instruction manual. Figures 1-11 The present invention provides a bypass valve device for a steam turbine system, which includes a bypass valve body 1, a valve inlet pipe 2 and two water spray pipes 4 connected to the bypass valve body 1, a plurality of water spray heads 3 connected to the water spray pipes 4 and the water spray heads 3 installed on the bypass valve body 1, a water inlet pipe 5 connected to the two water spray pipes 4, and an uninterrupted transfer box 6 installed on the bypass valve body 1, and the valve inlet pipe 2 installed on the uninterrupted transfer box 6.

[0048] Further, please refer to the appendix to the instruction manual. Figures 3-5 The present invention provides a bypass valve device for a steam turbine system, which further includes a buffer rust prevention device 7. The buffer rust prevention device 7 is installed in an uninterrupted transfer box 6 and is used to buffer steam. Specifically, the buffer rust prevention device 7 includes two transfer inner boxes 701, both of which are movably installed in the uninterrupted transfer box 6. An impact shaft 702 is rotatably installed in the transfer inner box 701. Multiple buffer push plates 703 are installed on the impact shaft 702. A buffer push groove 705 is opened on the inner wall of the top side of the transfer inner box 701. A blocking push plate 704 is slidably installed in the buffer push groove 705 and abuts against a buffer push plate 703. A buffer spring 706 is installed on the inner wall of the buffer push groove 705 and is installed on the blocking push plate 704.

[0049] It should be noted that in this embodiment of the invention, when steam enters a transfer inner box 701, the steam directly impacts the buffer push plate 703 to rotate. The buffer push plate 703 rotates within the transfer inner box 701 via the impact shaft 702. The rotation of the buffer push plate 703 pushes the blocking push plate 704 to move, causing the blocking push plate 704 to slide horizontally within the buffer push groove 705, and causing the buffer spring 706 to be stressed. Furthermore, when multiple buffer push plates 703 rotate, they all need to push the blocking push plate 704 to move and overcome the rebound force of the buffer spring 706, thereby achieving effective deceleration of the steam. In addition, by setting multiple rotatable buffer push plates 703, the corrosion and damage of the buffer push plate 703 by the steam can be dispersed, ensuring the durability of the buffer push plate 703.

[0050] More specifically, in this embodiment of the invention, an uninterrupted switching device 8 is installed inside the uninterrupted transfer box 6. The uninterrupted switching device 8 is used to switch the buffer rust prevention device 7. The uninterrupted switching device 8 includes a switching locking rod 801, which is movably installed inside the transfer inner box 701. A switching push plate 803 is movably installed inside the transfer inner box 701, and the switching push plate 803 is connected to the switching locking rod 801 in a transmission connection. It should be noted that in this embodiment of the invention, when the steam passes directly through the buffer push plate 703 and pushes the switching push plate 803 to move, it causes the switching locking rod 801 to disengage from the switching locking groove 802, thereby unlocking the transfer inner box 701 from the uninterrupted transfer box 6. At this time, under the pulling force of the switching spring 813, the two transfer inner boxes 701 move synchronously, and one switching air inlet box 710 disengages from the valve inlet pipe 2, while the other switching air inlet box 710 is connected to the valve inlet pipe 2. One switching air outlet box 711 disengages from the transfer pipe 708, and the other switching air outlet box 711 is connected to the transfer pipe 708, thereby realizing the function of automatic switching and continuously decelerating the steam.

[0051] Please continue to refer to the instruction manual appendix. Figures 3-5 Furthermore, the bypass valve device for a steam turbine system provided in this embodiment of the invention includes a buffer and rust prevention device 7, which further comprises two outlet funnels 709, respectively installed on two intermediate transfer chambers 701; a filter plate 707 is installed inside the intermediate transfer chamber 701, and the filter plate 707 is located inside the outlet funnels 709. It should be noted that, in this embodiment of the invention, the filter plate 707 is used to pre-filter the steam, thereby further ensuring the safety of the bypass valve body 1.

[0052] More specifically, in this embodiment of the invention, a switching air inlet box 710 is installed on the transfer inner box 701, and the switching air inlet box 710 is connected to the valve inlet pipe 2; in addition, a switching air outlet box 711 is installed on the air outlet funnel 709, and a transfer pipe 708 is installed on the bottom side of the uninterrupted transfer box 6, the transfer pipe 708 is installed on the bypass valve body 1, and the switching air outlet box 711 is connected to the transfer pipe 708. It should be noted that, in this embodiment of the invention, when the two transfer inner boxes 701 move synchronously to switch, one switching air inlet box 710 is disengaged from the valve inlet pipe 2, while the other switching air inlet box 710 is connected to the valve inlet pipe 2, and one switching air outlet box 711 is disengaged from the transfer pipe 708, while the other switching air outlet box 711 is connected to the transfer pipe 708, thereby realizing the function of automatic switching and continuously slowing down the steam.

[0053] Please refer to the instruction manual attached. Figure 3 and Figures 6-9Furthermore, the bypass valve device for a steam turbine system provided in this embodiment of the invention, the uninterrupted switching device 8 also includes a switching box 810, two switching slides 811 are slidably installed in the switching box 810, and mounting strips 812 are installed on both intermediate transfer boxes 701. The intermediate transfer boxes 701 are inserted into the switching slides 811 through the mounting strips 812.

[0054] Furthermore, a switching spring 813 is installed on the switching slide 811, and the switching spring 813 is installed on the inner wall of the switching box 810. It should be noted that, in this embodiment of the invention, when the transfer inner box 701 and the uninterrupted transfer box 6 are unlocked, the two transfer inner boxes 701 move synchronously under the pulling force of the switching spring 813, thereby achieving the purpose of switching the two transfer inner boxes 701.

[0055] More specifically, in this embodiment of the invention, a limiting sleeve 807 is installed on the inner wall of the transfer inner box 701, and a limiting push rod 806 is installed on the switching push plate 803. The limiting push rod 806 is slidably installed inside the limiting sleeve 807; a push-back spring 808 is installed at one end of the limiting push rod 806, and the push-back spring 808 is installed on the inner wall of the limiting sleeve 807. It should be noted that, in this embodiment of the invention, when the switching push plate 803 is blown by the tube, the limiting push rod 806 moves within the limiting sleeve 807, causing the push-back spring 808 to be subjected to force.

[0056] Please continue to refer to the instruction manual appendix. Figure 3 and Figures 6-9 More specifically, in this embodiment of the invention, a drive push plate 804 is installed on the switching push plate 803, and the switching locking rod 801 is movably installed on the drive push plate 804.

[0057] Furthermore, a switching locking groove 802 is provided on the top inner wall of the uninterrupted transfer box 6, and the switching locking rod 801 is inserted into the switching locking groove 802. It should be noted that, in this embodiment of the invention, when the switching push plate 803 is directly blown and moved by steam, the movement of the switching push plate 803 simultaneously drives the drive push plate 804 to move, and the drive push plate 804 drives the switching locking rod 801 to disengage from the switching locking groove 802, thereby achieving the purpose of automatically unlocking the transfer inner box 701 from the uninterrupted transfer box 6.

[0058] More specifically, in this embodiment of the invention, a drive push hole 809 is provided on the drive push plate 804, and a switching push shaft 805 is installed on the switching locking rod 801. The switching push shaft 805 is movably installed within the drive push hole 809. It should be noted that, in this embodiment of the invention, when the drive push plate 804 moves, the driving push hole 809 drives the switching push shaft 805 to move, causing the switching push shaft 805 to disengage the switching locking rod 801 from the switching locking groove 802.

[0059] It should be emphasized that the cross-section of the drive push hole 809 is V-shaped and one side is set horizontally, which provides buffer space for the slight movement of the switching push plate 803, and avoids the problem of accidental disengagement caused by the leakage of local steam pushing the switching push plate 803 to move locally.

[0060] Please refer to the instruction manual attached. Figure 3 and Figures 10-11 Furthermore, the bypass valve device for a steam turbine system provided in this embodiment of the invention also includes a nozzle switching device 9. The nozzle switching device 9 is installed on two water spray pipes 4, and the water inlet pipe 5 is installed on the nozzle switching device 9. The nozzle switching device 9 is used to switch the two water spray pipes 4.

[0061] Specifically, the nozzle switching device 9 includes a switching water inlet tank 901, which is installed on two spray pipes 4. A water inlet pipe 5 is installed on the switching water inlet tank 901, and a switching blocking frame 902 is movably installed inside the switching water inlet tank 901. The switching blocking frame 902 is used to close the spray pipes 4. It should be noted that in this embodiment of the invention, when the steam impact buffer push plate 703 rotates, the switching connecting rod 903 drives the switching blocking frame 902 to move, causing the switching blocking frame 902 to expose one spray pipe 4 while closing the other. When the buffer push plate 703 disengages from the blocking push plate 704, the blocking push plate 704 resets, thereby causing the switching push bar 904 to drive the switching connecting rod 903 to reset, thus achieving the switching of the two spray pipes 4 again, realizing the follow-up switching of the spray pipes 4.

[0062] More specifically, in this embodiment of the invention, a switching pusher 904 is movably installed on one side of the uninterrupted transfer box 6. A switching connecting rod 903 is installed on the switching pusher 904, and the switching connecting rod 903 is installed on the switching blocking frame 902. In addition, two vertical pressure grooves 905 are formed on the switching pusher 904, and a limit frame 906 is movably installed in each of the two vertical pressure grooves 905. The limit frame 906 is installed on the uninterrupted transfer box 6, and a vertical spring 907 is installed on the inner wall of the vertical pressure groove 905. The vertical spring 907 is installed on the limit frame 906. It should be noted that in this embodiment of the invention, when the switching pusher 904 is pushed, the two vertical pressure grooves 905 move vertically on the two limit frames 906, and the two vertical springs 907 are stressed. The switching pusher 904 moves downward, causing the switching connecting rod 903 to move, which in turn causes the switching connecting rod 903 to move the switching blocking frame 902, thereby achieving the purpose of switching the water spray pipe 4 through the switching blocking frame 902.

[0063] Please continue to refer to the instruction manual appendix. Figure 3 and Figures 10-11More specifically, in this embodiment of the invention, an L-shaped switching plate 909 is slidably installed on the uninterrupted transfer box 6, and an arc-shaped pusher 910 is installed on the L-shaped switching plate 909. The L-shaped switching plate 909 pushes the switching pusher 904 to move vertically through the arc-shaped pusher 910.

[0064] Furthermore, a transverse push rod 908 is installed on the blocking push plate 704. The movement of the blocking push plate 704 drives the L-shaped switching plate 909 to move via the transverse push rod 908. It should be noted that, in this embodiment of the invention, when the steam impact buffer push plate 703 rotates, causing the buffer push plate 703 to push the blocking push plate 704 to move, the blocking push plate 704 drives the transverse push rod 908 to move. The transverse push rod 908 drives the L-shaped switching plate 909 to move, causing the L-shaped switching plate 909 to drive the arc-shaped push bar 910 to move. The arc-shaped push bar 910 drives the switching push bar 904 to move. Moreover, when multiple buffer push plates 703 rotate, the vertical lifting and lowering of the switching push bar 904 can be achieved.

[0065] In summary, the working principle of the bypass valve device for a steam turbine system provided in this embodiment of the invention is as follows:

[0066] When steam is input into the bypass valve body 1, it first enters the uninterrupted transfer box 6 through the valve inlet pipe 2, and then enters a transfer inner box 701 through the switching air inlet box 710. This allows the steam to directly impact the buffer push plate 703 to rotate. The buffer push plate 703 rotates in the transfer inner box 701 through the impact shaft 702. The rotation of the buffer push plate 703 pushes the blocking push plate 704 to move, so that the blocking push plate 704 slides horizontally in the buffer push groove 705, and the buffer spring 706 is subjected to force. It should be noted that when multiple buffer push plates 703 rotate, they all need to push the blocking push plate 704 to move and overcome the rebound force of the buffer spring 706, thereby achieving effective deceleration of the steam. Furthermore, the setting of multiple rotatable buffer push plates 703 can disperse the corrosion and damage of the steam to the buffer push plate 703, ensuring the durability of the buffer push plate 703.

[0067] Furthermore, when a buffer push plate 703 is damaged due to long-term use, steam directly passes through the buffer push plate 703 and pushes the switching push plate 803 to move. The switching push plate 803 moves within the limiting sleeve 807 via the limiting push rod 806, causing the push-back spring 808 to be stressed. The movement of the switching push plate 803 simultaneously drives the drive push plate 804 to move. The drive push plate 804 drives the switching push shaft 805 to move via the drive push hole 809. The switching push shaft 805 drives the switching locking rod 801 to disengage from the switching locking groove 802, thereby unlocking the transfer inner box 701 from the uninterrupted transfer box 6. At this time, the switching... Under the pulling force of the spring 813, the two intermediate transfer boxes 701 move synchronously, and one switching air inlet box 710 is disconnected from the valve inlet pipe 2; at the same time, the other switching air inlet box 710 is connected to the valve inlet pipe 2, one switching air outlet box 711 is disconnected from the transfer pipe 708, and the other switching air outlet box 711 is connected to the transfer pipe 708, realizing the automatic switching function, continuously decelerating the steam, and after damage, the uninterrupted transfer box 6 can be opened, and then the damaged intermediate transfer box 701 can be taken out for repair, and can be reinstalled after repair;

[0068] Furthermore, when the steam impact buffer push plate 703 rotates, causing it to push the blocking push plate 704 to move, the blocking push plate 704 drives the transverse push rod 908 to move. The transverse push rod 908 then drives the L-shaped switching plate 909 to move, causing the L-shaped switching plate 909 to drive the arc-shaped push bar 910 to move. The arc-shaped push bar 910 then drives the switching push bar 904 to move. The switching push bar 904 moves vertically on the two limit brackets 906 via the two vertical pressure grooves 905, and causes the two vertical springs 906 to move vertically. 07. Force; It should be noted that when the switching push bar 904 moves down, it drives the switching linkage 903 to move, which in turn drives the switching blocking frame 902 to move. The switching blocking frame 902 exposes one water spray pipe 4 while closing the other water spray pipe 4. When the buffer push plate 703 disengages from the blocking push plate 704, the blocking push plate 704 resets, which in turn causes the switching push bar 904 to drive the switching linkage 903 to reset, thus realizing the switching of the two water spray pipes 4 again, thereby realizing the follow-up switching of the water spray pipes 4.

[0069] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bypass valve device for a steam turbine system, characterized in that, It includes a bypass valve body, a valve inlet pipe and two water spray pipes connected to the bypass valve body, multiple water spray heads connected to the water spray pipes and the water spray heads installed on the bypass valve body, water inlet pipes connected to the two water spray pipes, an uninterrupted transfer box installed on the bypass valve body, and the valve inlet pipe installed on the uninterrupted transfer box. It also includes a buffer and rust prevention device, which is installed inside the uninterrupted transfer box and is used to buffer the steam. The buffer and rust prevention device includes two transfer inner boxes, both of which are movably installed inside the uninterrupted transfer box. An impact shaft is rotatably installed inside the transfer inner box, and multiple buffer push plates are installed on the impact shaft. A buffer push groove is opened on the inner wall of the top side of the transfer inner box, and a blocking push plate is slidably installed in the buffer push groove. The blocking push plate abuts against one of the buffer push plates. A buffer spring is installed on the inner wall of the buffer push groove and is installed on the blocking push plate. An uninterrupted switching device is installed inside the uninterrupted transfer box. The uninterrupted switching device is used to switch the buffer and rust prevention device. The uninterrupted switching device includes a switching locking rod, which is movably installed inside the transfer inner box. A switching push plate is movably installed inside the transfer inner box, and the switching push plate is throttle-connected to the switching locking rod. The uninterrupted switching device also includes a switching box, in which two switching slides are slidably installed. Each of the two transfer inner boxes is equipped with an installation strip, and the transfer inner box is inserted into the switching slide through the installation strip. A switching spring is installed on the switching slide, and the switching spring is installed on the inner wall of the switching box.

2. A bypass valve device for a steam turbine system according to claim 1, characterized in that, The buffer and rust prevention device also includes two air outlet funnels, which are respectively installed on the two transfer inner boxes; A filter plate is installed inside the transfer box, and the filter plate is located inside the air outlet funnel.

3. A bypass valve device for a steam turbine system according to claim 2, characterized in that, The transfer inner box is equipped with a switching air intake box, which is connected to the valve inlet pipe; A switching outlet box is installed on the outlet funnel, and a transfer pipe is installed on the bottom side of the uninterrupted transfer box. The transfer pipe is installed on the bypass valve, and the switching outlet box is connected to the transfer pipe.

4. A bypass valve device for a steam turbine system according to claim 1, characterized in that, A limiting sleeve is installed on the inner wall of the transfer box, and a limiting push rod is installed on the switching push plate. The limiting push rod is slidably installed inside the limiting sleeve. A push-back spring is installed at one end of the limiting push rod, and the push-back spring is installed on the inner wall of the limiting sleeve.

5. A bypass valve device for a steam turbine system according to claim 4, characterized in that, A drive push plate is mounted on the switching push plate, and the switching locking rod is movably mounted on the drive push plate. A switching locking groove is provided on the top inner wall of the uninterrupted transfer box, and the switching locking rod is inserted into the switching locking groove.

6. A bypass valve device for a steam turbine system according to claim 5, characterized in that, The drive push plate has a drive push hole, and the switching lock rod is equipped with a switching push shaft, which is movably installed in the drive push hole.

7. A bypass valve device for a steam turbine system according to claim 1, characterized in that, It also includes a nozzle switching device, which is installed on the two water spray pipes and the water inlet pipe is installed on the nozzle switching device. The nozzle switching device is used to switch the two water spray pipes. The nozzle switching device includes a switching water inlet tank, which is installed on the two spray pipes. The water inlet pipes are installed on the switching water inlet tank, and a switching baffle is movably installed inside the switching water inlet tank. The switching baffle is used to close the spray pipes.

8. A bypass valve device for a steam turbine system according to claim 7, characterized in that, A switching push bar is movably installed on one side of the uninterrupted transfer box, a switching connecting rod is installed on the switching push bar, and the switching connecting rod is installed on the switching blocking frame; The switching push bar has two vertical pressure grooves, and a limit frame is movably installed in each of the two vertical pressure grooves. The limit frame is installed on the uninterrupted transfer box. A vertical spring is installed on the inner wall of the vertical pressure groove, and the vertical spring is installed on the limit frame.

9. A bypass valve device for a steam turbine system according to claim 8, characterized in that, An L-shaped switching plate is slidably installed on the uninterrupted transfer box, and an arc-shaped pusher is installed on the L-shaped switching plate. The L-shaped switching plate pushes the switching pusher to move vertically through the arc-shaped pusher. A transverse push rod is installed on the blocking push plate, and the movement of the blocking push plate pushes the L-shaped switching plate to move through the transverse push rod.

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