An automatic steam pressure regulating device and method for a waste heat power generation steam turbine

Abstract

The present application relates to the technical field of waste heat power generation, and particularly relates to a steam pressure automatic regulating device and method for a waste heat power generation steam turbine. The automatic regulating device comprises a steam regulating assembly, which is installed between a steam pipeline and a steam input pipeline of the waste heat power generation steam turbine. Pressure detection assemblies are respectively installed on the steam regulating assembly corresponding to the steam pipeline and the steam input pipeline. The pressure detection assemblies are in communication connection with a controller, and the controller is in communication connection with the steam regulating assembly. A steam buffer assembly is installed on the steam regulating assembly and is in communication connection with the controller. The automatic regulating method is to use the pressure detection assemblies to measure pressure in real time and transmit the pressure to the controller. The controller compares the pressure with a preset threshold value, controls the steam regulating assembly to increase or decrease flow, and ensures stable pressure. The present application can stabilize system operation when waste heat fluctuates, improve power generation efficiency and equipment safety, and automatically and accurately regulate steam pressure according to working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat power generation, and in particular to a device and method for automatically regulating steam pressure of a waste heat power generation steam turbine. Background Art

[0002] In the field of waste heat power generation, steam turbines are key equipment, and stable control of their steam pressure is crucial to power generation efficiency and safe operation of equipment.

[0003] Currently, traditional methods for regulating steam pressure in waste heat power generation steam turbines rely primarily on manual adjustment or simple mechanical adjustment devices. Manual adjustment suffers from slow response speed and low adjustment accuracy, making it difficult to adapt to fluctuations in the waste heat source in real time. This leads to unstable steam pressure, which in turn affects power generation efficiency and increases energy waste. While simple mechanical adjustment devices can achieve a certain degree of automatic adjustment, their fixed adjustment logic prevents them from flexibly adjusting to complex and changing operating conditions. When the waste heat source experiences large fluctuations or the turbine load changes, it is difficult to stabilize the steam pressure within the ideal range. Furthermore, they suffer from poor reliability and high maintenance costs, which limit the efficient and stable operation of waste heat power generation systems.

[0004] Therefore, how to automatically and accurately adjust the steam pressure according to actual working conditions is an urgent problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In order to be able to automatically and accurately adjust the steam pressure according to actual working conditions, the present application provides a device and method for automatically adjusting the steam pressure of a waste heat power generation turbine.

[0006] This application provides a device and method for automatically regulating steam pressure of a waste heat power generation steam turbine, which adopts the following technical solutions:

[0007] First aspect

[0008] A steam pressure automatic regulating device for a waste heat power generation steam turbine comprises a steam regulating component, which is installed between the steam pipe and the steam input pipe of the waste heat power generation steam turbine; pressure detection components are installed on the steam regulating component corresponding to the steam pipe and the steam input pipe respectively, the pressure detection component is communicatively connected to a controller, the controller is communicatively connected to the steam regulating component, a steam buffer component is installed on the steam regulating component, and the steam buffer component is communicatively connected to the controller.

[0009] Through the above technical solution, the waste heat power generation steam turbine steam pressure automatic regulating device disclosed in this application achieves the goal of automatically and accurately regulating the steam pressure according to the actual working conditions through a closed-loop process of pressure monitoring, signal transmission, intelligent decision-making and execution. By adopting a multi-component collaborative working method, combined with the real-time monitoring of the pressure detection component and the intelligent calculation of the controller, compared with the traditional single adjustment method, it can more accurately control the steam pressure and achieve stable regulation. At the same time, the steam buffer component can act quickly when the steam pressure changes, absorb or release steam, effectively shorten the system response time, quickly respond to pressure fluctuations, and enable the device to quickly adapt to changes in working conditions during waste heat power generation.

[0010] Furthermore, the steam regulating component includes a cylinder, a regulating valve seat is fixedly and sealedly installed inside the cylinder, an end of the cylinder corresponding to the outlet of the regulating valve seat is sealed and connected to the steam pipe, and an end of the cylinder corresponding to the inlet of the regulating valve seat is sealed and connected to the steam input pipe, and a regulating valve disc is sealingly and rotatably connected inside the regulating valve seat, and regulating valve holes are provided on the regulating valve disc and the regulating valve seat, and a first drive component is installed on the cylinder with a transmission connection to the regulating valve disc, and the first drive component is communicatively connected to the controller.

[0011] The above technical solution, utilizing the unique design of the regulating valve disc and the regulating valve hole on the regulating valve seat, as well as the precise control of the regulating valve disc by the first drive assembly, enables refined regulation of steam flow. Compared to traditional regulation methods, this solution can more flexibly respond to different pressure regulation requirements and achieve more accurate steam pressure regulation. Furthermore, the first drive assembly is connected to the controller in communication, quickly and accurately actuating the regulating valve disc according to the controller's instructions, achieving automated control, reducing manual intervention, improving regulation efficiency and stability, and meeting the requirements of automated operation of waste heat power generation systems.

[0012] Furthermore, the cylinder is fixedly and sealedly connected to a plurality of loading pipes arranged in parallel at both ends of the regulating valve seat, one end of the loading pipe is sealed and connected to the steam pipe through the cylinder, the outer side of the loading pipe is fixedly and sealedly connected to a connecting pipe, the connecting pipe is sealed and connected to the steam input pipe through the cylinder, a loading valve assembly is sealed and installed inside the loading pipe, and the loading valve assembly is communicatively connected to the controller.

[0013] With this technical solution, a loading pipe connects the areas inside the cylinder corresponding to the steam pipe and the steam input pipe, forming a steam bypass channel parallel to the regulating valve seat. The steam flow in the bypass channel can be adjusted by controlling the opening degree of the loading valve assembly installed inside the loading pipe using controller signals.

[0014] Furthermore, the first drive assembly includes a first drive shaft, which is rotatably connected to the inside of the cylinder, one end of the first drive shaft is fixedly connected to the regulating valve disc, and a worm gear is fixedly installed on the end of the first drive shaft away from the regulating valve disc. A worm is rotatably connected to the inside of the cylinder corresponding to the worm gear, and the worm gear is transmission-connected to the worm gear. The worm gear is transmission-connected to a driving member, and the driving member is fixedly and sealedly mounted on the cylinder, and the driving member is communicatively connected to the controller.

[0015] The above technical solution, utilizing the characteristics of the worm-turbine transmission structure with a large transmission ratio, smooth transmission, and low noise, can stably transmit the power of the driving member to the regulating valve disc, avoiding jitter or sticking during the adjustment process, and ensuring the accuracy and stability of steam pressure regulation. In addition, the worm-turbine transmission also has a self-locking function. When the driving member stops working, the turbine cannot reverse drive the worm, allowing the regulating valve disc to stably maintain its current adjustment position, preventing the regulating valve disc from rotating due to factors such as steam pressure fluctuations, ensuring the stability of the steam pressure after adjustment, and improving the safety of the device operation.

[0016] Furthermore, the loading valve assembly includes a loading valve seat, which is fixedly and sealingly installed inside the loading pipe at a position between the steam pipe and the steam input pipe. A loading valve body is sealingly and slidingly connected to the loading valve seat inside the loading pipe. A loading valve stem is connected to the loading valve body. A loading valve mounting seat is fixedly and sealingly installed on the end of the loading pipe corresponding to the loading valve stem. The loading valve mounting seat is sealingly and slidingly connected to the loading valve stem. A first telescopic member is fixedly installed on the loading valve mounting seat, and the telescopic end of the first telescopic member is fixedly connected to the loading valve stem.

[0017] The above technical solution utilizes the loading valve assembly and other components, such as the regulating valve disc, to work together to form a multi-stage regulation mechanism. By controlling the opening and closing state of the loading valve body and adjusting the regulating valve orifice, precise control of steam flow can be achieved under different operating conditions. Compared with a single regulation structure, the accuracy and stability of steam pressure regulation can be significantly improved.

[0018] Furthermore, the pressure detection assembly includes a first pressure sensor and a second pressure sensor. The first pressure sensor is fixedly and sealedly installed at a position on the steam regulating assembly that is sealed and connected to the steam pipe. The second pressure sensor is fixedly and sealedly installed at a position on the steam regulating assembly that is sealed and connected to the steam input pipe. The first pressure sensor and the second pressure sensor are both communicatively connected to the controller.

[0019] This technical solution, through the installation of pressure sensors on both the steam pipeline and the steam input pipeline, enables dual monitoring of steam pressure before and after regulation. This provides the controller with more comprehensive and accurate pressure data, ensuring the accuracy of regulation decisions. Furthermore, based on the pressure difference between the two sensors, the controller analyzes the throttling effect of the valve assembly and the system resistance characteristics, further optimizing the regulation algorithm for more refined steam pressure control and improved waste heat power generation efficiency.

[0020] Furthermore, the steam buffer assembly includes an air guide pipe, and the end of the cylinder away from the steam input pipe is sealed and fixedly connected to a mounting plate, the air guide pipe is sealingly and slidingly connected to the mounting plate, and a piston push plate is sealingly and slidingly connected to the air guide pipe, and a buffer spring is abutted and connected between the piston push plate and the mounting plate.

[0021] The above technical solution utilizes the mechanical linkage between the piston push plate and the buffer spring, allowing the device to automatically expand and contract according to steam pressure without the need for additional power, absorbing or releasing steam energy in real time. When the pressure rises suddenly, the compression process of the buffer spring can delay the impact of the pressure peak on the pipeline; when the pressure drops suddenly, the spring resets and releases the cached energy, avoiding excessive pressure attenuation and significantly improving the system's anti-interference ability. It operates solely on the balance between steam pressure and spring elasticity, without the need for electrical or hydraulic drive, reducing the device's energy consumption while avoiding regulation failures caused by power system failures. It is particularly suitable for scenarios with unstable energy in waste heat power generation, improving system reliability.

[0022] Furthermore, the air duct is sealed and slidably connected with a high-pressure sealing sleeve and a low-pressure sealing sleeve respectively, the high-pressure sealing sleeve and the air duct are both provided with a high-pressure air guide port, and the low-pressure sealing sleeve and the air duct are both provided with a low-pressure air guide port; the outer ends of the air duct located away from the high-pressure sealing sleeve and the low-pressure sealing sleeve are respectively fixedly connected with a first spring and a second spring, and a cache tank sealed and connected with the air duct is sealed and installed on the cylinder.

[0023] Through the above technical solution, the nested sliding structure of high-pressure and low-pressure sealing sleeves and air ducts and the double spring preload design are utilized to achieve precise control of the dual thresholds of steam pressure and automatic switching of cache. When the pressure exceeds the high-pressure threshold, the piston push plate pushes the high-pressure sealing sleeve to align the air port, and the steam enters the cache tank; when the pressure is lower than the low-pressure threshold, the buffer spring resets and pushes the low-pressure sealing sleeve, and the cached steam is replenished to the cylinder. The spring preload ensures that the air port is sealed under normal pressure to avoid leakage. This design does not require a power source and realizes automatic adjustment through a mechanical structure. It has the advantages of adjustable thresholds, smooth response, and compact structure. It can also form passive protection when the control system fails, thereby improving system reliability and applicability.

[0024] Second aspect

[0025] A method for automatically regulating steam pressure of a waste heat power generation steam turbine based on the device of the first aspect comprises the following steps:

[0026] Step 1: The pressure detection component detects the steam pressure in the steam pipe and steam input pipe of the waste heat power generation turbine in real time, and converts the pressure data into an electrical signal and transmits it to the controller;

[0027] Step 2: The controller receives the pressure data transmitted by the pressure detection component and compares and analyzes it with the preset pressure threshold range; if the steam pressure in the steam pipe is higher than the preset upper pressure threshold, the controller proceeds to step 3; if the steam pressure in the steam pipe is lower than the preset lower pressure threshold, the controller proceeds to step 4; if the steam pressure in the steam pipe is within the preset pressure threshold range, the controller returns to step 1 and continues to monitor the steam pressure in real time;

[0028] Step 3: The controller calculates the steam flow rate that needs to be reduced based on the pressure deviation value and the regulation control algorithm, and sends a control signal to the steam regulation component to reduce the steam flow rate. After receiving the control signal, the driving mechanism of the steam regulation component reduces the opening, thereby reducing the steam flow rate and lowering the steam pressure. After the steam pressure is reduced, the process returns to step 1 and re-tests the steam pressure until the steam pressure in the steam pipe stabilizes within the preset pressure threshold range.

[0029] Step 4: The controller calculates the steam flow regulation amount that needs to be increased based on the pressure deviation value and the regulation control algorithm, and sends a control signal to the steam regulation component to increase the steam flow; after receiving the control signal, the driving mechanism of the steam regulation component increases the opening, thereby increasing the steam flow and raising the steam pressure; after the steam pressure increases, return to step 1 and re-check the steam pressure until the steam pressure in the steam pipe stabilizes within the preset pressure threshold range.

[0030] Furthermore, step two includes: if the steam pressure in the steam pipe and the steam input pipe is higher than the upper limit of the preset pressure threshold, the steam buffer component absorbs the steam while entering step three to reduce the steam pressure in the steam input pipe; if the steam pressure in the steam pipe and the steam input pipe is lower than the lower limit of the preset pressure threshold, the steam buffer component releases the steam while entering step four to maintain the steam pressure in the steam input pipe.

[0031] Beneficial effects achieved:

[0032] The application realizes automatic and accurate adjustment of steam pressure through closed-loop control design of multi-component cooperation. The pressure detection component monitors the pressure of the double pipeline in real time to provide decision basis for the controller; the steam adjustment component realizes fine control of flow through composite adjustment of the adjusting valve disc and the bypass of the loading pipe; the self-locking characteristic of the worm turbine transmission ensures the stability of adjustment; the steam buffer component realizes energy-free pressure buffering through mechanical structure, and the double-threshold sealing sleeve design improves the adjustment accuracy. The application can still maintain stable operation of the system under the scene of waste heat fluctuation, significantly improves the waste heat power generation efficiency and equipment safety, and can automatically and accurately adjust the steam pressure according to the actual working condition. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic diagram of the overall structure of an embodiment of the application.

[0034] Figure 2 is a schematic diagram of the structure of an embodiment of the application.

[0035] Figure 3 is a schematic diagram of the first internal structure of an embodiment of the application.

[0036] Figure 4 is a schematic diagram of the second internal structure of an embodiment of the application.

[0037] Figure 5 is a schematic diagram of the installation structure of the steam buffer component in an embodiment of the application.

[0038] Figure 6 is a schematic diagram of the installation structure of the first driving component in an embodiment of the application.

[0039] Figure 7 is a logic block diagram of the pressure automatic adjustment method in an embodiment of the application.

[0040] Explanation of reference numerals: 100, steam regulating assembly; 101, cylinder; 102, first connecting seat; 103, regulating valve seat; 104, regulating valve disc; 105, regulating valve hole; 106, loading pipe; 107, connecting pipe; 108, end cover; 200, pressure detection assembly; 201, first pressure sensor; 202, second pressure sensor; 300, steam buffer assembly; 301, air guide pipe; 302, mounting plate; 303, sealing end; 304, opening end; 307, piston push plate; 308, buffer spring; 305, high-pressure sealing sleeve Tube; 306, low-pressure sealing sleeve; 309, high-pressure air guide port; 310, low-pressure air guide port; 311, first spring; 312, second spring; 314, cache tank; 315, second telescopic member; 500, first drive assembly; 501, first drive shaft; 502, worm gear; 503, worm; 504, drive member; 600, loading valve assembly; 601, loading valve seat; 602, loading valve body; 603, loading valve stem; 604, loading valve mounting seat; 605, first telescopic member; 800, steam pipe; 900, steam input pipe. DETAILED DESCRIPTION

[0041] The following is combined with Figures 1-7 This application is described in further detail.

[0042] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0044] The embodiments of the present application disclose a device and method for automatically regulating steam pressure of a waste heat power generation steam turbine.

[0045] Example 1

[0046] Please refer to Figures 1 to 6In one embodiment of the present application, a steam pressure automatic regulating device for a waste heat power generation steam turbine includes a steam regulating component 100, which is installed between the steam pipe 800 and the steam input pipe 900 of the waste heat power generation steam turbine; pressure detection components 200 are installed on the steam regulating component 100 corresponding to the steam pipe 800 and the steam input pipe 900 respectively, and the pressure detection component 200 is communicatively connected to the controller, and the controller is communicatively connected to the steam regulating component 100; a steam buffer component 300 is installed on the steam regulating component 100, and the steam buffer component 300 is communicatively connected to the controller.

[0047] During operation, pressure detection assembly 200 collects real-time pressure data from steam pipe 800 and steam input pipe 900, converts the data into electrical signals, and transmits them to the controller. The controller compares the received pressure data with a preset pressure threshold to determine the current steam pressure status.

[0048] When the steam pressure in the steam pipe 800 is higher than the preset threshold upper limit, the controller sends a control signal to the steam regulating component 100 to control the steam regulating component 100 to reduce the steam flow; when the steam pressure of the steam pipe 800 and the steam input pipe 900 are both higher than the preset threshold upper limit, the controller controls the steam buffer component 300 to start, and the steam buffer component 300 absorbs excess steam to relieve the pressure in the pipe.

[0049] When the steam pressure in steam pipe 800 falls below a preset lower threshold, the controller sends a control signal to steam regulating assembly 100, causing it to increase steam flow. When the steam pressure in both steam pipe 800 and steam input pipe 900 falls below the preset lower threshold, the controller activates steam buffer assembly 300, which releases stored steam to maintain stable steam pressure. This entire regulation process continues in a continuous cycle, dynamically adjusting according to pressure changes in real time to ensure that steam pressure remains stable within a reasonable range.

[0050] Please refer to Figures 1 to 6In a specific embodiment of the present application, the steam regulating component 100 includes a cylinder 101, and a regulating valve seat 103 is fixedly and sealedly installed inside the cylinder 101. The end of the cylinder 101 corresponding to the outlet of the regulating valve seat 103 is sealed and connected to the steam pipe 800, and the end of the cylinder 101 corresponding to the inlet of the regulating valve seat 103 is fixedly and sealedly connected to the first connecting seat 102. The first connecting seat 102 is sealed and connected to the steam input pipe 900. The regulating valve seat 103 is internally sealed and rotatably connected to the regulating valve disc 104. The regulating valve disc 104 and the regulating valve seat 103 are each provided with a plurality of regulating valve holes 105 arranged in a centrally symmetrical manner. The distance between two adjacent regulating valve holes 105 is greater than the maximum width of the regulating valve hole 105. A first drive component 500 that is transmission-connected to the regulating valve disc 104 is installed on the cylinder 101, and the first drive component 500 is communicatively connected to the controller.

[0051] In the steam regulating component 100, steam enters the cylinder 101 through the steam input pipe 900 and the first connecting seat 102. After receiving the pressure data transmitted by the pressure detection component, the controller analyzes and judges according to the preset pressure threshold. When it is necessary to adjust the steam flow to control the pressure, the controller sends a control signal to the first drive component 500. The first drive component 500 can drive the regulating valve disc 104 to rotate in the regulating valve seat 103. Since the regulating valve disc 104 and the regulating valve seat 103 are provided with centrally symmetrical regulating valve holes 105, and the distance between adjacent regulating valve holes 105 is greater than their maximum width, during the rotation of the regulating valve disc 104, the overlapping area of ​​the regulating valve disc 104 and the regulating valve hole 105 on the regulating valve seat 103 is changed, thereby achieving the regulation of the steam flow rate. When the steam flow needs to be reduced, the first drive assembly 500 drives the regulating valve disc 104 to rotate, thereby reducing the overlapping area of ​​the regulating valve hole 105 and limiting the amount of steam passing through; when the steam flow needs to be increased, the regulating valve disc 104 is rotated in the opposite direction to increase the overlapping area of ​​the regulating valve hole 105 and allow more steam to pass through, thereby ultimately achieving effective regulation of the steam pressure of the waste heat power generation turbine.

[0052] Please refer to Figures 1 to 6 In a specific embodiment of the present application, the outer side of the cylinder 101 is located at both ends of the regulating valve seat 103 and is fixedly and sealedly connected with a plurality of loading pipes 106 arranged in parallel. One end of the loading pipe 106 is sealed and connected to one end of the corresponding steam pipe 800 inside the cylinder 101. The outer side of the loading pipe 106 is fixedly and sealedly connected to a connecting pipe 107 that is sealed and connected to the corresponding steam input pipe 900 inside the cylinder 101. The loading valve assembly 600 is sealed and installed through the other end of the loading pipe 106, which is located between the steam pipe 800 and the steam input pipe 900. The loading valve assembly 600 is communicatively connected to the controller.

[0053] During operation, when the pressure in the steam pipe 800 is higher than the preset threshold upper limit, the controller not only controls the regulating valve disc 104 to reduce the steam flow, but also reduces the opening of the loading valve assembly 600 or partially closes the loading valve assembly 600 according to the pressure difference, thereby further reducing the steam flow.

[0054] When the pressure in the steam pipe 800 is lower than the preset threshold, the controller controls the regulating valve disc 104 to increase the steam flow. If the pressure still does not meet the standard, the steam buffer assembly 300 and the loading valve assembly 600 can be opened to increase the bypass channel and maintain pressure stability.

[0055] Please refer to Figures 1 to 6 In a specific embodiment of the present application, the first drive assembly 500 includes a first drive shaft 501, which is rotatably connected to the inside of the cylinder 101, and one end of the first drive shaft 501 is fixedly connected to the regulating valve disc 104. A worm gear 502 is fixedly installed on the end of the first drive shaft 501 away from the regulating valve disc 104, and a worm 503 is rotatably connected to the corresponding worm gear 502 inside the cylinder 101. The worm 503 and the worm gear 502 are matched with each other for transmission connection, and one end of the worm 503 passes through the side wall of the cylinder 101 and is fixedly connected to a driving member 504. The driving member 504 is fixedly installed on the cylinder 101, and the driving member 504 is communicatively connected to the controller.

[0056] When the controller receives the steam pressure data from the pressure detection component and determines through analysis that the steam flow needs to be adjusted, it will send a control signal to the driver 504. After receiving the signal, the driver 504 starts working and drives the worm 503 to rotate. Since the worm 503 and the worm wheel 502 cooperate in transmission, the rotation of the worm 503 will drive the worm wheel 502 to rotate. The worm wheel 502 is fixedly mounted on the first drive shaft 501, causing the first drive shaft 501 to rotate accordingly. One end of the first drive shaft 501 is fixedly connected to the regulating valve disc 104, thereby driving the regulating valve disc 104 to rotate in the regulating valve seat 103. By changing the overlapping area of ​​the regulating valve disc 104 and the regulating valve hole 105 on the regulating valve seat 103, the steam flow is regulated, and ultimately the purpose of controlling the steam pressure is achieved.

[0057] Please refer to Figures 1 to 6In a specific embodiment of the present application, the loading valve assembly 600 includes a loading valve seat 601, which is fixedly and sealingly installed inside the loading pipe 106 at a position between the steam pipe 800 and the steam input pipe 900. The loading valve body 602 is sealingly and slidingly connected to the loading valve seat 601 inside the loading pipe 106, and the loading valve body 602 is connected to the loading valve stem 603. The end of the loading pipe 106 is fixedly and sealingly installed with a loading valve mounting seat 604 corresponding to the loading valve stem 603. The loading valve mounting seat 604 is sealingly and slidingly connected to the loading valve stem 603. A first telescopic member 605 is fixedly installed on the loading valve mounting seat 604, and the telescopic end of the first telescopic member 605 is fixedly connected to the loading valve stem 603.

[0058] When the controller determines that the steam flow needs to be adjusted based on the feedback signal from the pressure detection component, it sends a control instruction to the first telescopic member 605. The telescopic end of the first telescopic member 605 drives the loading valve stem 603 to slide along the loading valve mounting seat 604, thereby driving the loading valve body 602 to move relative to the loading valve seat 601 in the loading tube 106. When the first telescopic member 605 shortens, it pulls the loading valve stem 603 to move the loading valve body 602 away from the loading valve seat 601, increasing the flow gap between the loading valve seat 601 and the loading valve body 602, and the steam flows through the connecting pipe 107 and the loading tube 106 into the portion of the cylinder 101 connected to the steam pipe 800. When the first telescopic member 605 extends, it pushes the loading valve stem 603 to bring the loading valve body 602 close to the loading valve seat 601, reducing the flow gap or completely closing the channel, blocking the flow of steam through the loading tube 106.

[0059] Please refer to Figures 1 to 6 In a specific embodiment of the present application, the pressure detection assembly 200 includes a first pressure sensor 201 and a second pressure sensor 202. The first pressure sensor 201 is fixedly and sealedly installed on the steam regulating assembly 100 at a position where it is sealed and connected to the steam pipe 800. The second pressure sensor 202 is fixedly and sealedly installed on the steam regulating assembly 100 at a position where it is sealed and connected to the steam input pipe 900. The first pressure sensor 201 and the second pressure sensor 202 are both communicatively connected to the controller.

[0060] In this waste heat power generation steam turbine automatic steam pressure regulation system, the first pressure sensor 201 and the second pressure sensor 202 of the pressure detection assembly 200 respectively monitor the steam pressure in the steam pipe 800 and the steam input pipe 900 in real time. The first pressure sensor 201 is installed at the connection point between the steam regulation assembly 100 and the steam pipe 800, directly obtaining steam pressure data at the steam turbine outlet; the second pressure sensor 202 is installed at the connection point between the steam regulation assembly 100 and the steam input pipe 900, collecting steam pressure data before entering the regulation device.

[0061] The first pressure sensor 201 and the second pressure sensor 202 convert the collected pressure signals into electrical signals and transmit them to the controller in real time via a communication line. The controller analyzes and compares the two sets of pressure data, calculates the pressure difference and change trend, and then sends adjustment instructions to the steam regulating component 100 and the steam buffer component 300 according to the preset control strategy. For example, when the first pressure sensor 201 detects that the pressure in the steam pipe 800 is too high, the controller will drive the regulating valve disc 104 to reduce the opening and start the loading valve assembly 600 or the steam buffer assembly 300 to reduce the pressure; otherwise, the regulating valve opening will be increased or the buffered steam will be released, forming a closed-loop control.

[0062] Please refer to Figures 1 to 6 In a specific embodiment of the present application, the steam buffer assembly 300 includes an air guide tube 301, and the end of the cylinder 101 away from the steam input pipe 900 is sealed and fixedly connected to the mounting plate 302. The air guide tube 301 is sealed and slidably connected to the mounting plate 302. The end of the air guide tube 301 close to the steam input pipe 900 is a sealed end 303, and the end of the air guide tube 301 that passes through the mounting plate 302 is an open end 304. A piston push plate 307 is sealed and slidably connected to the air guide tube 301, and a buffer spring 308 is abutted against the piston push plate 307 and the mounting plate 302.

[0063] The steam buffer assembly 300 implements dynamic steam caching based on the principle of pressure balance. When the pressure in the steam input pipeline 900 increases, the high-pressure steam pushes the piston push plate 307 to compress the buffer spring 308, causing the air guide tube 301 to slide toward the open end 304. At this point, the buffer spring 308 absorbs the steam pressure and converts it into elastic force to buffer the steam, thereby alleviating the steam pressure in the pipeline. When the steam pressure decreases, the buffer spring 308 pushes the piston push plate 307 back to its original position. At this point, the buffer spring 308 releases the absorbed steam pressure, thereby maintaining the steam pressure in the pipeline.

[0064] Please refer to Figures 1 to 6In a specific embodiment of the present application, a high-pressure sealing sleeve 305 and a low-pressure sealing sleeve 306 are respectively sealed and slidably connected at the positions outside the two ends of the piston push plate 307 on the air guide pipe 301, and a high-pressure air guide port 309 is opened on the high-pressure sealing sleeve 305 and the air guide pipe 301, and a low-pressure air guide port 310 is opened on the low-pressure sealing sleeve 306 and the air guide pipe 301; the outer ends of the high-pressure sealing sleeve 305 and the low-pressure sealing sleeve 306 on the air guide pipe 301 away from each other are respectively fixedly connected with a first spring 311 and a second spring 312, the first spring 311 pushes the high-pressure sealing sleeve 305 to make the high-pressure air guide ports 309 staggered to form a seal with the air guide pipe 301, and the second spring 312 pushes the low-pressure sealing sleeve 306 to make the low-pressure air guide ports 310 staggered to form a seal with the air guide pipe 301; a cache tank 314 is sealed and installed on the cylinder 101, which is sealed and connected to the air guide pipe 301.

[0065] During operation, when the steam pressure rises abnormally, the high-pressure steam pushes the piston push plate 307 toward the mounting plate 302, compressing the buffer spring 308. When the pressure reaches the high-pressure threshold, the displacement of the piston push plate 307 overcomes the elastic force of the first spring 311 and pushes the high-pressure sealing sleeve 305, aligning the high-pressure gas port 309 on the high-pressure sealing sleeve 305 with the high-pressure gas port 309 of the gas pipe 301. The steam then enters the buffer tank 314 through the gas pipe 301.

[0066] When the steam pressure drops to the low-pressure threshold, the buffer spring 308 pushes the piston push plate 307 to reset. Pushing the piston push plate 307 will push the low-pressure sealing sleeve 306, and the low-pressure air port 310 on the low-pressure sealing sleeve 306 will be aligned with the low-pressure air port 310 on the air pipe 301. The steam in the buffer tank 314 is released through the air pipe 301, thereby replenishing the steam pressure inside the cylinder 101.

[0067] The preload force of the first spring 311 and the second spring 312 ensures that within the normal pressure range, the high-pressure air port 309 and the low-pressure air port 310 remain in a staggered sealed state and are opened only when the pressure is abnormal, thereby achieving dual-threshold precise control of the steam pressure.

[0068] Please refer to Figures 1 to 6 In a specific embodiment of the present application, a second telescopic member 315 is hingedly connected to the air guide tube 301, the outer end of the cylinder 101 is fixedly and sealedly connected to the end cover 108, the second telescopic member 315 is installed on the end cover 108, and the second telescopic member 315 is communicatively connected to the controller.

[0069] Under different steam working conditions, the steam buffer assembly 300 can be adjusted by intervention, and the controller can send a control signal to the second telescopic member 315. After receiving the controller signal, the second telescopic member 315 can directly drive the air guide tube 301 to slide on the mounting plate 302 by extending or shortening.

[0070] When the rated working pressure of the steam is designed to be low, the controller controls the extension of the second telescopic member 315 to push the air duct 301 away from the end cover 108, so that the piston push plate 307 can push the high-pressure sealing sleeve 305 by moving a shorter distance, prompting the high-pressure air duct 309 to align faster, accelerating the speed at which steam enters the cache tank 314, and enhancing the cache effect.

[0071] When the rated working pressure of the steam is designed to be higher, the controller controls the second telescopic part 315 to shorten, pulling the air guide tube 301 to move toward the end cover 108, so that the piston push plate 307 can push the low-pressure sealing sleeve 306 by moving a shorter distance, prompting the low-pressure air guide port 310 to be aligned faster, accelerating the release of steam in the buffer tank 314, and thus adjusting the steam pressure more quickly.

[0072] Therefore, the second telescopic member 315 can actively adjust the initial position of the air duct 301, thereby pre-calibrating steam systems with different rated working pressures. The high-pressure cache triggering conditions are optimized in advance under low-pressure conditions, and the low-pressure release response is accelerated under high-pressure conditions, which significantly broadens the scope of application of the device and eliminates the need for customized designs for systems with different pressure levels. At the same time, the pre-adjustment function of the second telescopic member 315 also shortens the action stroke of the piston push plate 307, significantly reducing the alignment time of the high-pressure air port 309 and the low-pressure air port 310, greatly improving the cache or release efficiency during sudden pressure changes, which is especially suitable for scenarios with frequent residual heat fluctuations.

[0073] In one embodiment of the present application, a waste heat power generation turbine steam pressure automatic regulating device also includes a hydraulic system, the hydraulic system is communicatively connected to the controller, the driving member 504 is configured as a hydraulic motor, the first telescopic member 605 and the second telescopic member 315 are both configured as hydraulic cylinders, and the driving member 504, the first telescopic member 605 and the second telescopic member 315 are all connected to the hydraulic system.

[0074] During operation, the hydraulic system, serving as the power source, precisely drives the steam regulating device through closed-loop control. Based on data from the pressure sensing component, the controller calculates the optimal operating parameters for the regulating valve disc, loading valve, and steam buffer assembly, and converts the electrical signals into hydraulic control commands. The hydraulic system drives the hydraulic motor (driver 504), which, via a worm-turbine transmission, rotates the regulating valve disc. This adjusts flow by varying the overlap of the regulating valve orifices. The smoothness of the hydraulic transmission ensures smooth adjustment and improves flow control accuracy. The controller, through the hydraulic system, drives the hydraulic cylinder (first telescopic element 605) to adjust the clearance between the loading valve body and the valve seat, achieving dynamic control of the bypass steam flow. The hydraulic cylinder's linear motion enables more direct and efficient valve opening adjustment. The hydraulic system also drives the hydraulic cylinder (second telescopic element 315) to adjust the position of the air guide tube, optimizing the triggering threshold for the piston push disc. This prevents pressure fluctuations by proactively intervening in steam buffering and release timing, enhancing the system's anti-interference capabilities.

[0075] The hydraulic system employed in this design provides torque far exceeding that of electric drives, ensuring smooth rotation of the regulating valve disc even under high-pressure differentials, thus avoiding the hysteresis or failure of conventional motors due to excessive loads. Furthermore, the hydraulic system incorporates protective devices such as relief valves, which automatically unload when the load exceeds the set value, preventing component damage and extending equipment life. Furthermore, the incompressibility of hydraulic oil allows for virtually zero delay in power transmission. Compared to the electromagnetic hysteresis associated with electric control, this shortens system response time and allows for rapid response to sudden changes in steam pressure. Hydraulic flow can also be precisely controlled through proportional valves or servo valves, enabling micron-level adjustment of the valve disc angle and load valve opening, effectively ensuring pressure control accuracy.

[0076] Example 2

[0077] Please refer to Figures 1 to 7 In one embodiment of the present application, a method for automatically regulating steam pressure of a waste heat power generation steam turbine based on the device of Example 1 includes the following steps:

[0078] Step 1: The pressure detection component 200 detects the steam pressure in the steam pipe 800 and the steam input pipe 900 of the waste heat power generation turbine in real time, and converts the pressure data into an electrical signal and transmits it to the controller;

[0079] Step 2: The controller receives the pressure data transmitted by the pressure detection component 200 and compares and analyzes it with the preset pressure threshold range. If the steam pressure in the steam pipe 800 is higher than the preset upper pressure threshold, the process proceeds to step 3. If the steam pressure in the steam pipe 800 is lower than the preset lower pressure threshold, the process proceeds to step 4. If the steam pressure in the steam pipe 800 is within the preset pressure threshold range, the process returns to step 1 and continues to monitor the steam pressure in real time.

[0080] Step 3: The controller calculates the steam flow rate that needs to be reduced based on the pressure deviation value and the regulation control algorithm, and sends a control signal to the steam regulation component 100 to reduce the steam flow rate. After receiving the control signal, the driving mechanism of the steam regulation component 100 reduces the opening, thereby reducing the steam flow rate and lowering the steam pressure. After the steam pressure is reduced, the process returns to step 1 and re-tests the steam pressure until the steam pressure in the steam pipe 800 stabilizes within the preset pressure threshold range.

[0081] Step 4: The controller calculates the steam flow regulation amount that needs to be increased based on the pressure deviation value and the regulation control algorithm, and sends a control signal to increase the steam flow to the steam regulating component 100; the driving mechanism of the steam regulating component 100 increases the opening after receiving the control signal, thereby increasing the steam flow and raising the steam pressure; after the steam pressure increases, return to step 1 and re-check the steam pressure until the steam pressure in the steam pipe 800 stabilizes within the preset pressure threshold range.

[0082] This automatic regulation method uses pressure detection as a starting point and achieves stable steam pressure regulation through closed-loop control. First, the first pressure sensor 201 and the second pressure sensor 202 in the pressure detection assembly 200 monitor the steam pressure in the steam pipe 800 and the steam input pipe 900 in real time, converting the physical pressure signal into an electrical signal and transmitting it to the controller.

[0083] After receiving the pressure data, the controller compares and analyzes it with the pre-set pressure threshold range. When the steam pressure in the steam pipe 800 is higher than the preset pressure threshold upper limit, the controller calculates the required steam flow reduction based on the pressure deviation value and the internal regulation control algorithm, and sends a control signal to the drive mechanism of the steam regulation component 100 (such as the first drive component 500 and the first telescopic member 605 of the loading valve component 600). After receiving the signal, the drive mechanism drives the regulating valve disc 104 to reduce the opening, or closes part of the loading valve component 600, reducing the steam flow and thereby reducing the steam pressure. When the steam pressure decreases, the system returns to step one and continues to monitor the pressure until the steam pressure stabilizes within the preset threshold range.

[0084] Conversely, when the steam pressure in steam pipe 800 falls below the preset lower pressure threshold, the controller calculates the required steam flow rate adjustment and sends a flow rate increase control signal to steam regulating assembly 100. The drive mechanism activates, increasing the opening of regulating valve disc 104 or partially opening loading valve assembly 600, increasing steam flow and raising steam pressure. The system then returns to step 1, continuously monitoring and adjusting to ensure stable steam pressure. This entire process, through continuous monitoring, analysis, adjustment, and feedback, forms a closed-loop control system, achieving automatic steam pressure regulation.

[0085] Please refer toFigures 1 to 7 In a specific embodiment of the present application, step two includes: if the steam pressure in the steam pipe 800 and the steam input pipe 900 is higher than the upper limit of the preset pressure threshold, the steam buffer component 300 absorbs the steam while entering step three to reduce the steam pressure in the steam input pipe 900; if the steam pressure in the steam pipe 800 and the steam input pipe 900 is lower than the lower limit of the preset pressure threshold, the steam buffer component 300 releases the steam while entering step four to maintain the steam pressure in the steam input pipe 900.

[0086] This automatic regulation method, centered on dual-end pressure monitoring and coordinated regulation, achieves precise steam pressure control. The first and second pressure sensors 201 and 202 in the pressure detection assembly 200 collect real-time pressure data from the steam pipe 800 and steam input pipe 900, respectively, and convert these data into electrical signals for transmission to the controller.

[0087] The controller compares and analyzes the received pressure data with the preset pressure threshold range. When the steam pressure in both steam pipe 800 and steam input pipe 900 exceeds the preset upper pressure threshold, the controller sends a control signal to the drive mechanism of steam regulating assembly 100 to reduce the steam flow rate, driving the regulating valve disc 104 to reduce its opening and partially closing the loading valve assembly 600, thereby reducing steam input at the source. Furthermore, the controller sends a command to steam buffer assembly 300, causing the second telescopic member 315 to move the air guide pipe 301, aligning the high-pressure air guide port 309 on the high-pressure sealing sleeve 305. Steam enters the buffer tank 314 for storage, thus reducing the pressure in the steam input pipe 900.

[0088] When the steam pressure in both steam pipeline 800 and steam input pipeline 900 falls below the preset lower pressure threshold, the controller sends a control signal to steam regulating assembly 100 to increase steam flow, driving regulating valve disc 104 to increase its opening and partially opening loading valve assembly 600. Simultaneously, the steam buffer assembly 300 is controlled, with the second telescopic member 315 pulling on the air guide tube 301, aligning the low-pressure air guide port 310 on the low-pressure sealing sleeve 306. The buffer tank 314 releases stored steam, replenishing it to the steam input pipeline 900 and maintaining pressure stability. After adjustment, the system returns to the pressure detection phase, continuously monitoring and adjusting the system in a closed-loop control loop.

[0089] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A steam pressure automatic regulating device for a waste heat power generation steam turbine, characterized by: The invention comprises a steam regulating component (100), wherein the steam regulating component (100) is installed between a steam pipe (800) and a steam input pipe (900) of a waste heat power generation steam turbine; a pressure detection component (200) is installed on the steam regulating component (100) corresponding to the steam pipe (800) and the steam input pipe (900), respectively; the pressure detection component (200) is communicatively connected to a controller, and the controller is communicatively connected to the steam regulating component (100); a steam buffer component (300) is installed on the steam regulating component (100), and the steam buffer component (300) is communicatively connected to the controller; the steam regulating component (100) comprises a cylinder (101), The cylinder (101) is fixedly and sealedly installed with a regulating valve seat (103) inside. One end of the cylinder (101) corresponding to the outlet of the regulating valve seat (103) is sealedly connected to the steam pipe (800). One end of the cylinder (101) corresponding to the inlet of the regulating valve seat (103) is sealedly connected to the steam input pipe (900). The regulating valve seat (103) is sealed and rotatably connected with a regulating valve disc (104). The regulating valve disc (104) and the regulating valve seat (103) are both provided with regulating valve holes (105). The cylinder (101) is installed with a first drive component (500) that is transmission-connected to the regulating valve disc (104). The first drive component (500) ) is communicatively connected to the controller; a plurality of loading pipes (106) arranged in parallel are fixedly and sealedly connected at both ends of the regulating valve seat (103) on the cylinder (101), one end of the loading pipe (106) is sealedly connected to the steam pipe (800) through the cylinder (101), and a connecting pipe (107) is fixedly and sealedly connected to the outside of the loading pipe (106), and the connecting pipe (107) is sealedly connected to the steam input pipe (900) through the cylinder (101), and a loading valve assembly (600) is sealedly installed inside the loading pipe (106), and the loading valve assembly (600) is communicatively connected to the controller; the first drive assembly (500) includes a first drive assembly (500) The first drive shaft (501) is rotatably connected to the inside of the cylinder (101), one end of the first drive shaft (501) is fixedly connected to the regulating valve disc (104), and a worm gear (502) is fixedly installed on the end of the first drive shaft (501) away from the regulating valve disc (104). A worm (503) is rotatably connected to the inside of the cylinder (101) corresponding to the worm gear (502), the worm gear (503) and the worm gear (502) are matched and transmission-connected, the worm gear (503) is transmission-connected to a driving member (504), the driving member (504) is fixedly and sealingly mounted on the cylinder (101), and the driving member (504) is communicatively connected to the controller.

2. The automatic steam pressure regulating device for a waste heat power generation steam turbine according to claim 1, characterized in that: The loading valve assembly (600) includes a loading valve seat (601), which is fixedly and sealingly installed inside the loading pipe (106) at a position between the steam pipe (800) and the steam input pipe (900). The loading pipe (106) is sealed and slidably connected to a loading valve body (602) corresponding to the loading valve seat (601). The loading valve body (602) is connected to a loading valve stem (603). The end of the loading pipe (106) is fixedly and sealingly installed with a loading valve mounting seat (604) corresponding to the loading valve stem (603). The loading valve mounting seat (604) is sealed and slidably connected to the loading valve stem (603). A first telescopic member (605) is fixedly installed on the loading valve mounting seat (604), and the telescopic end of the first telescopic member (605) is fixedly connected to the loading valve stem (603).

3. The automatic steam pressure regulating device for a waste heat power generation steam turbine according to claim 1, characterized in that: The pressure detection assembly (200) comprises a first pressure sensor (201) and a second pressure sensor (202); the first pressure sensor (201) is fixedly and sealedly mounted on the steam regulating assembly (100) at a position in sealed communication with the steam pipe (800); the second pressure sensor (202) is fixedly and sealedly mounted on the steam regulating assembly (100) at a position in sealed communication with the steam input pipe (900); and both the first pressure sensor (201) and the second pressure sensor (202) are communicatively connected to the controller.

4. The automatic steam pressure regulating device for a waste heat power generation steam turbine according to claim 1, characterized in that: The steam buffer assembly (300) includes an air guide tube (301), an end of the cylinder (101) away from the steam input pipe (900) is sealed and fixedly connected to a mounting plate (302), the air guide tube (301) is sealed and slidably connected to the mounting plate (302), a piston push plate (307) is sealed and slidably connected to the air guide tube (301), and a buffer spring (308) is abutted and connected between the piston push plate (307) and the mounting plate (302).

5. The automatic steam pressure regulating device for a waste heat power generation steam turbine according to claim 4, characterized in that: The air duct (301) is sealed and slidably connected with a high-pressure sealing sleeve (305) and a low-pressure sealing sleeve (306), and the high-pressure sealing sleeve (305) and the air duct (301) are both provided with a high-pressure air guide port (309), and the low-pressure sealing sleeve (306) and the air duct (301) are both provided with a low-pressure air guide port (310); the outer ends of the air duct (301) that are located away from each other and the high-pressure sealing sleeve (305) and the low-pressure sealing sleeve (306) are respectively fixedly connected with a first spring (311) and a second spring (312), and the cylinder (101) is sealed and installed with a buffer tank (314) that is sealed and connected with the air duct (301).

6. A method for automatically regulating steam pressure of a waste heat power generation steam turbine based on the regulating device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: The pressure detection component (200) detects the steam pressure in the steam pipe (800) and the steam input pipe (900) of the waste heat power generation steam turbine in real time, and converts the pressure data into an electrical signal and transmits it to the controller; Step 2: The controller receives the pressure data transmitted by the pressure detection component (200), and compares and analyzes the data with the preset pressure threshold range; if the steam pressure in the steam pipe (800) is higher than the preset pressure threshold upper limit, the controller proceeds to step 3; if the steam pressure in the steam pipe (800) is lower than the preset pressure threshold lower limit, the controller proceeds to step 4; if the steam pressure in the steam pipe (800) is within the preset pressure threshold range, the controller returns to step 1 and continues to monitor the steam pressure in real time; Step 3: The controller calculates the steam flow rate adjustment amount that needs to be reduced based on the pressure deviation value and the adjustment control algorithm, and sends a control signal to the steam adjustment component (100) to reduce the steam flow rate; after receiving the control signal, the driving mechanism of the steam adjustment component (100) reduces the opening, thereby reducing the steam flow rate and lowering the steam pressure; after the steam pressure is reduced, return to step 1 and re-detect the steam pressure until the steam pressure in the steam pipe (800) is stabilized within a preset pressure threshold range; Step 4: The controller calculates the steam flow regulation amount that needs to be increased based on the pressure deviation value and the regulation control algorithm, and sends a control signal for increasing the steam flow to the steam regulation component (100); after receiving the control signal, the driving mechanism of the steam regulation component (100) increases the opening, thereby increasing the steam flow and raising the steam pressure; after the steam pressure increases, the controller returns to step 1 and re-detects the steam pressure until the steam pressure in the steam pipe (800) stabilizes within the preset pressure threshold range.

7. The method for automatically regulating steam pressure of a waste heat power generation steam turbine according to claim 6, characterized in that: The step 2 includes: if the steam pressure in the steam pipe (800) and the steam input pipe (900) is higher than the upper limit of the preset pressure threshold, the steam buffer component (300) absorbs the steam while entering step 3 to reduce the steam pressure in the steam input pipe (900); if the steam pressure in the steam pipe (800) and the steam input pipe (900) is lower than the lower limit of the preset pressure threshold, the steam buffer component (300) releases the steam while entering step 4 to maintain the steam pressure in the steam input pipe (900).

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