Multi-channel sub-control gas turbine gas supply electromagnetic valve

Abstract

The invention provides a multi-channel sub-control gas turbine gas supply electromagnetic valve, and relates to the field of gas turbines. The multi-channel separately-controlled gas turbine gas supply electromagnetic valve comprises a valve body, the valve body is provided with a circular section structure, a plurality of independent sealing cavities, an arc-shaped groove A and an arc-shaped groove B are formed in the valve body, and an arc-shaped sealing plate A and a gas supply pipe which are used for sliding along the interiors of the arc-shaped groove A and the arc-shaped groove B are installed in the arc-shaped groove A and the arc-shaped groove B correspondingly; and elastic sheets A are mounted between the arc-shaped sealing plates A and the air supply pipes close to the arc-shaped sealing plates A. According to the multi-channel separately-controlled gas turbine gas supply electromagnetic valve, compressed air with different pressures is introduced through an air inlet hole, an arc-shaped sealing plate A is pushed to move in an arc-shaped groove A, the shielding area of the arc-shaped sealing plate A to a gas flow channel is changed, meanwhile, the arc-shaped sealing plate A can stay at any middle position of the flow channel in cooperation with the elastic balance force of an elastic piece A, and therefore the gas flow channel can be closed. Therefore, the size of the fuel gas through-flow section is continuously and smoothly changed, and stepless regulation of the fuel gas flow is achieved.

Description

Technical Field

[0001] This invention relates to the field of gas turbines, specifically to a multi-channel, separately controlled gas turbine gas supply solenoid valve. Background Technology

[0002] A gas turbine is a rotary power machine that uses gas as fuel. Its core relies on compressed air, a mixture of gas and fuel, combustion and expansion to drive a turbine rotation and generate power. Widely used in power generation, aviation, and industrial power applications, it is a highly efficient energy conversion device. The solenoid valve is a core control component of the gas turbine's gas supply system. Its function is to precisely control the on / off state, flow rate, and path switching of the gas, adapting to different operating conditions. Traditional solenoid valves are driven by electromagnetic force. When energized, the electromagnet generates an attractive force that pulls the valve core together, changing the on / off state of the internal flow path (opening or closing the corresponding gas path). When de-energized, the electromagnet's attractive force disappears, and the valve core returns to its initial position under the action of a return spring, cutting off or connecting the gas path, thus achieving on / off control.

[0003] Traditional electromagnetic drive structures are limited by the attraction characteristics of electromagnets, and the valve core can only achieve a fixed stroke of reciprocating motion, and cannot stop at any position. Therefore, it is impossible to control the gas flow area by adjusting the valve core opening. Traditional gas turbine gas supply solenoid valves are mostly electromagnetically driven two-position on or off control, which can only realize the complete opening or closing of the gas path, and it is difficult to steplessly regulate the gas flow. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-channel, separately controlled gas turbine gas supply solenoid valve, which solves the problem of difficulty in steplessly regulating gas flow.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a multi-channel gas turbine gas supply solenoid valve with separate control, including a valve body, the valve body having a circular cross-sectional structure, the valve body having a plurality of independent sealing chambers, an arc groove A and an arc groove B, and an arc sealing plate A and a gas supply pipe for sliding along the inside of the arc groove A and the arc groove B are respectively installed inside the arc sealing plate A and the arc groove B. An elastic plate A is installed between the arc-shaped sealing plate A and the adjacent air supply pipe. The air supply pipe moves the arc-shaped sealing plate A through the elastic plate A and controls the opening and closing of the arc-shaped groove A. An air inlet is provided at one end of the arc-shaped groove A. The position of the arc-shaped sealing plate A can be adjusted by injecting gas into the air inlet.

[0006] Preferably, the air supply pipe is L-shaped, a rotating plate is rotatably installed inside the valve body, and several air supply pipes pass through the rotating plate and are fixedly connected to the rotating plate.

[0007] Preferably, one end of the gas supply pipe is provided with an exhaust groove for conveying combustible gas into the corresponding sealed chamber.

[0008] Preferably, the arc-shaped sealing plate A includes a plate body and a sealing sleeve, with the plate body fixedly installed in the sealing sleeve.

[0009] Preferably, a protrusion is fixedly installed on the outer surface of the arc-shaped sealing plate A, and the protrusion is used to fix one end of the elastic sheet A.

[0010] Preferably, the outer peripheral surface of the valve body is provided with a plurality of air inlets, each air inlet being connected to an air inlet port adjacent to it.

[0011] Preferably, a number of chambers are fixedly installed on the outside of the valve body, each chamber is connected to an arc-shaped groove A adjacent to it, and the gas outlet end of the chamber is used to connect to the gas turbine fuel metal pipeline.

[0012] Preferably, the valve body is further provided with a sealing ring cavity through which several arc-shaped grooves B are formed. Several sealing plates B are installed in the sealing ring cavity and slide along it. The air supply pipe passes through the sealing plates B that are close to each other and is fixedly connected to them.

[0013] Preferably, an "L"-shaped master control rod is fixedly connected to the rotating plate, a fixing block is fixedly installed on one side of the valve body, an elastic plate B is fixedly connected between the master control rod and the fixing block, and an electromagnetic control mechanism is also provided on one side of the valve body. The electromagnetic control mechanism includes an electromagnetic coil, a stationary iron core and a moving iron core, and one end of the moving iron core forms an arc-shaped protrusion that abuts against the master control rod.

[0014] Preferably, the valve body, rotating plate, and main control rod are located at the same axis.

[0015] Compared with the prior art, the present invention has the following advantages: By introducing compressed air at different pressures through the air inlet, the arc-shaped sealing plate A moves within the arc-shaped groove A, changing the area of ​​the arc-shaped sealing plate A obstructing the gas flow channel. Simultaneously, the elastic balancing force of the elastic plate A allows the arc-shaped sealing plate A to remain at any midpoint of the flow channel, thereby continuously and smoothly changing the size of the gas flow cross-section and achieving stepless adjustment of the gas flow rate. By passing the gas supply pipe through and fixing it on the same rotating plate, centralized control and synchronous opening and closing of multiple gas supply paths are facilitated, simplifying the overall control structure and reducing control complexity. Multiple air inlets are provided around the valve body, allowing direct connection to existing centralized compressed air sources at the gas turbine site without the need for additional power equipment, resulting in convenient installation and low modification costs. Each air inlet corresponds to an air inlet hole, enabling independent pneumatic control of each path without interference. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the valve body and its internal structure according to the present invention; Figure 3This is a cross-sectional view of the valve body of the present invention; Figure 4 This is a side view of the valve body of the present invention; Figure 5 This is a partial structural diagram of the present invention; Figure 6 This is a cross-sectional view of the arc-shaped sealing plate A of the present invention; Figure 7 This is a sectional view of the side view of the arc-shaped sealing plate A of the present invention; Figure 8 This is a schematic diagram of the rotating plate and the main control rod of the present invention.

[0017] The components are as follows: 1. Valve body; 2. Sealing chamber; 3. Arc groove A; 4. Arc groove B; 5. Arc sealing plate A; 501. Plate body; 502. Sealing sleeve; 6. Air supply pipe; 7. Elastic plate A; 8. Air inlet; 9. Rotating plate; 10. Exhaust groove; 11. Protrusion; 12. Air inlet head; 13. Chamber body; 14. Sealing ring cavity; 15. Sealing plate B; 16. Main control rod; 17. Electromagnetic control mechanism. Detailed Implementation

[0018] like Figures 1-8 As shown, a multi-path gas turbine gas supply solenoid valve includes a valve body 1 with a circular cross-section. The valve body 1 contains several independent sealing chambers 2, an arc-shaped groove A3, and an arc-shaped groove B4. Arc-shaped sealing plates A5 for sliding along the interior of arc-shaped grooves A3 and B4 are respectively installed inside the latter. The gas supply pipes 6 are L-shaped. A rotating plate 9 is rotatably mounted inside the valve body 1. Several gas supply pipes 6 pass through the rotating plate 9 and are fixedly connected to it. By passing the L-shaped gas supply pipes 6 through and fixing them to the same rotating plate 9, the rotation of the rotating plate 9 can drive all the gas supply pipes 6 to move synchronously. This facilitates centralized control and synchronous opening and closing of multiple gas supply paths, simplifies the overall control structure, improves the consistency of multi-path actions, and reduces control complexity. One end of the gas supply pipe 6 is provided with an exhaust groove 10 for conveying combustible gas. The gas supply pipe 6 is installed at the end of the corresponding sealed chamber 2, and the gas supply pipe 6 is provided with an exhaust groove 10, which can directionally deliver the combustible gas to the corresponding sealed chamber 2, avoid gas turbulence and pressure fluctuation, ensure stable gas delivery, and improve the stability of the gas turbine combustion conditions. An "L"-shaped main control rod 16 is fixedly connected to the rotating plate 9. A fixed block is fixedly installed on one side of the valve body 1. An elastic plate B is fixedly connected between the main control rod 16 and the fixed block. An electromagnetic control mechanism 17 is also provided on one side of the valve body 1. The electromagnetic control mechanism 17 includes an electromagnetic coil, a stationary iron core and a moving iron core. One end of the moving iron core forms an arc-shaped protrusion and abuts against the main control rod 16. When the electromagnetic coil is energized, the stationary iron core attracts the moving iron core and moves linearly, pushing the main control rod 16 to rotate around the axis of the valve body 1. When the electromagnetic coil is de-energized, the moving iron core moves back under the reset action of the elastic plate B, driving the main control rod 16 to reset.

[0019] An elastic plate A7 is installed between the arc-shaped sealing plate A5 and the adjacent gas supply pipe 6. The gas supply pipe 6 moves the arc-shaped sealing plate A5 and controls the opening and closing of the arc-shaped groove A3 through the elastic plate A7. The arc-shaped sealing plate A5 includes a plate body 501 and a sealing sleeve 502. The plate body 501 is fixedly installed in the sealing sleeve 502. While ensuring structural strength, it improves sealing performance, effectively reduces the risk of gas leakage, adapts to the high-pressure and flammable working environment of the gas turbine, and improves the safety of valve use. A protrusion 11 is fixedly installed on the outer surface of the arc-shaped sealing plate A5. The protrusion 11 is used to fix one end of the elastic plate A7, so that the driving force of the elastic plate A7 can be stably transmitted to the arc-shaped sealing plate A5, ensuring reliable transmission and smooth operation, preventing the elastic element from slipping, and improving working reliability.

[0020] The outer circumference of the valve body 1 is provided with several air inlets 12, each air inlet 12 is connected to its adjacent air inlet 8. The air inlets 12 can be connected to the compressed air source at the gas turbine site through thin pipes. The compressed air source at the gas turbine site is a centralized gas supply system. The main system pipe will be arranged along the equipment area. According to the installation position of the multi-channel solenoid valve, a branch interface (i.e., "gas interface") can be led out from the main pipe near the valve body 1. The number of interfaces must match the number of air inlets 12 of the solenoid valve (one air inlet 12 corresponds to one interface). No additional gas source is required, only simple pipe connection is needed. Several chambers 13 are fixedly installed on the outer side of the valve body 1. Each chamber 13 is connected to an arc-shaped... The gas supply pipe 6 is connected to the gas supply pipe 6. The gas discharged from the gas supply pipe 6 enters the sealed chamber 2. The gas in the sealed chamber 2 enters the gas supply pipe 13 through the arc groove A3, and then enters the gas supply pipe 13 through the gas supply pipe 6. Then it enters the combustion chamber through the gas nozzle of the gas engine. The valve body 1 is also provided with a sealing ring cavity 14 that passes through several arc grooves B4. Several sealing plates B15 that slide along the sealing ring cavity 14 are installed in the sealing ring cavity 14. The gas supply pipe 6 passes through the adjacent sealing plates B15 and is fixedly connected to them. When the sealing plates B15 and the gas supply pipe 6 move, they always block the sealing grooves B to prevent the gas from leaking from the sealing grooves B.

[0021] An air inlet 8 is provided at one end of the arc-shaped groove A3. The position of the arc-shaped sealing plate A5 can be adjusted by injecting gas into the air inlet 8. The valve body 1, the rotating plate 9 and the main control rod 16 are located on the same axis. When the main control rod 16 rotates, it can drive several air supply pipes 6 to rotate synchronously through the rotating plate 9, thereby realizing the simultaneous closing or opening of several arc-shaped grooves A3.

[0022] By employing a valve body 1 with a circular cross-section structure, multiple independent sealed chambers 2, arc-shaped grooves A and B are internally arranged to achieve physical isolation of multiple gas passages and avoid crosstalk between gas sources. The arc-shaped sealing plate A5 slides along the arc-shaped groove A3 and is driven by the elastic plate A7. The structure is simple and compact, occupies little space, and the position of the arc-shaped sealing plate A5 can be adjusted by introducing compressed air through the air inlet 8, so as to achieve flexible control of the on / off state and opening degree of the arc-shaped groove A3, which meets the independent distribution and flow regulation requirements of the gas turbine's multiple gas passages.

[0023] In use, this solenoid valve has a circular cross-section valve body 1 as the main body, with multiple independent sealed chambers 2, arc grooves A3 and B inside, forming multiple independent gas channels to avoid crosstalk between the gas channels and ensure stable gas supply under different operating conditions of the gas turbine. The valve body 1 adopts a circular layout, which greatly reduces the overall space occupied while realizing multi-channel integration, and is suitable for dense installation environments of gas turbine equipment.

[0024] Gas is input through gas supply pipe 6 and directed and smoothly delivered into the corresponding sealed chamber 2 via exhaust groove 10 at one end of gas supply pipe 6. This avoids gas turbulence and pressure fluctuations, ensuring stable gas delivery and providing a basis for subsequent flow regulation and combustion. The sealed chamber 2 is connected to the arc-shaped groove A3. The gas is finally delivered to the gas outlet end of the chamber 13 via the arc-shaped groove A3 and the outer chamber 13, and then connected to the gas turbine fuel metal pipeline. It is then injected into the combustion chamber through the fuel nozzle to participate in combustion. The entire flow path is short and the pressure loss is small, allowing direct connection to the existing gas turbine pipeline system.

[0025] To achieve stepless adjustment of gas flow, an arc-shaped sealing plate A5 that can slide along the arc-shaped groove A3 is installed inside the arc-shaped groove A3. An air inlet 8 is opened at one end of the arc-shaped groove A3 and connects to an air inlet head 12 on the outer periphery of the valve body 1. The air inlet head 12 is connected to the centralized compressed air source at the gas turbine site through a thin pipe. No additional power equipment is required, resulting in low installation and modification costs. During operation, compressed air of different pressures is introduced into the air inlet 8, and the air pressure pushes the arc-shaped sealing plate A5 to move within the arc-shaped groove A3. The arc-shaped sealing plate A5 and the air supply pipe 6... An elastic plate A7 is provided between the gas pressure thrust and the elastic force of the elastic plate A7, so that the arc-shaped sealing plate A5 can be stably stopped at any intermediate position in the arc-shaped groove A3. This allows for continuous and smooth changes in the size of the gas flow cross section, thereby achieving stepless regulation of the gas flow rate. This precisely matches the continuously changing flow requirements under all operating conditions, such as gas turbine ignition, low load, variable load, and full load, ensuring a stable air-fuel ratio, improving combustion efficiency, reducing pollutant emissions, and avoiding the risks of flameout, backfire, and thermal shock caused by flow jumps.

[0026] The arc-shaped sealing plate A5 is composed of a plate body 501 and a sealing sleeve 502. While ensuring structural strength, it improves sealing performance and effectively reduces the risk of gas leakage. The outer surface is provided with protrusions 11 to fix the elastic sheet A7, so that the elastic force is stably transmitted, ensuring that the arc-shaped sealing plate A5 moves smoothly, is reliably positioned, and does not slip off.

[0027] The valve body 1 is also provided with a sealing ring cavity 14 that runs through multiple arc-shaped grooves B4. A sliding sealing plate B is installed in the ring cavity. The gas supply pipe 6 runs through and is fixed to the corresponding sealing plate B15. When the gas supply pipe 6 moves, the sealing plate B15 slides along with it and always blocks the arc-shaped grooves B4 to prevent gas from leaking out from the gap between the grooves, thereby further improving the overall sealing safety.

[0028] This valve can achieve two working modes: single-channel independent control and multi-channel centralized control. In single-channel control, each air inlet 12 is independently connected to compressed air, and the opening of the corresponding arc-shaped sealing plate A5 is adjusted to achieve independent stepless adjustment of the gas flow of each channel without interference. Centralized control is achieved by electromagnetic control mechanism 17 and synchronous transmission structure: L-shaped gas supply pipes 6 are all fixed on the same rotating plate 9, and the rotating plate 9 is connected to the L-shaped main control rod 16. The main control rod 16 is connected to the valve body 1 fixed block through elastic plate B. An electromagnetic control mechanism 17 consisting of an electromagnetic coil, a stationary iron core, and a moving iron core is set on one side of the valve body 1. The arc-shaped protrusion at the end of the moving iron core abuts against the main control rod 16. When the electromagnetic coil is energized, the stationary iron core attracts the moving iron core and moves it linearly. The moving iron core pushes the main control rod 16 to rotate around the axis of the valve body 1. When the electromagnetic coil is de-energized, the electromagnetic attraction disappears, and the main control rod 16 swings back under the reset action of elastic plate B, driving the moving iron core to reset, so as to realize the reciprocating swing of the main control rod 16. Since the valve body 1, the rotating plate 9 and the main control rod 16 are arranged coaxially, the transmission is smooth and efficient. When the main control rod 16 rotates, it drives all the air supply pipes 6 to rotate synchronously through the rotating plate 9, thereby driving the multi-channel arc groove A3 to open or close synchronously. This can realize the safety control functions of emergency cut-off and unified start-stop, simplify the control structure, improve the consistency of multi-channel actions, and reduce the complexity of system control.

[0029] In summary, this solenoid valve replaces the traditional on / off control with pneumatic stepless regulation and the multi-valve splicing scheme with a circular integrated structure. It not only meets the necessary requirements for continuous and precise regulation of gas in gas turbines, but also has the advantages of simple structure, small footprint, low cost, reliable sealing, and flexible control, making it fully compatible with the usage requirements of gas turbine gas supply systems.

[0030] It should be noted that traditional solenoid valves are mostly electromagnetically driven two-position on / off controls, which can only fully open or close the gas path. They are difficult to steplessly regulate the gas flow rate and require the addition of a flow control valve, and then the addition of flow or pressure feedback sensors. Miniature gas flow sensors and pressure sensors are added at the outlet of the solenoid valve or the inlet of the gas turbine combustion chamber to collect the actual gas flow or pressure data in real time, compare it with the set value, and dynamically correct the action of the drive components through the controller to form a closed-loop control, which increases the cost. In contrast, this solenoid valve can perform stepless regulation, saving costs. The gas demand changes continuously from ignition and low load to full load. Stepless regulation can accurately match the flow rate, avoid flow jumps, ensure a stable air-fuel ratio, more complete combustion, improve efficiency, reduce emissions, and smoothly transition the flow rate when the load changes, preventing flameout, backfire, and temperature shock, protecting the safe and stable operation of the gas turbine. It can be adapted to fuels with different calorific values ​​without stopping the machine to replace parts, making it more adaptable.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-channel, separately controlled gas turbine gas supply solenoid valve, comprising a valve body (1), characterized in that: The valve body (1) has a circular cross-sectional structure. The valve body (1) is provided with several independent sealing chambers (2), arc groove A (3) and arc groove B (4). Arc sealing plate A (5) and air supply pipe (6) for sliding along their interiors are respectively installed in the interiors of arc groove A (3) and arc groove B (4). An elastic plate A (7) is installed between the arc-shaped sealing plate A (5) and the air supply pipe (6) adjacent to it. The air supply pipe (6) moves the arc-shaped sealing plate A (5) through the elastic plate A (7) and controls the opening and closing of the arc-shaped groove A (3). An air inlet (8) is provided at one end of the arc groove A (3), and the position of the arc sealing plate A (5) is adjusted by injecting gas into the air inlet (8).

2. The multi-channel, separately controlled gas turbine gas supply solenoid valve according to claim 1, characterized in that: The air supply pipe (6) is L-shaped, and a rotating plate (9) is rotatably installed inside the valve body (1). Several air supply pipes (6) pass through the rotating plate (9) and are fixedly connected to the rotating plate (9).

3. The multi-channel, separately controlled gas turbine gas supply solenoid valve according to claim 1, characterized in that: One end of the gas supply pipe (6) is provided with an exhaust groove (10) for conveying combustible gas into the corresponding sealed chamber (2).

4. The multi-channel, separately controlled gas turbine gas supply solenoid valve according to claim 1, characterized in that: The arc-shaped sealing plate A (5) includes a plate body (501) and a sealing sleeve (502), with the plate body (501) fixedly installed in the sealing sleeve (502).

5. A multi-channel, separately controlled gas turbine gas supply solenoid valve according to claim 1, characterized in that: The outer surface of the arc-shaped sealing plate A (5) is fixedly fitted with a protrusion (11), which is used to fix one end of the elastic sheet A (7).

6. The multi-channel, separately controlled gas turbine gas supply solenoid valve according to claim 1, characterized in that: The outer circumferential surface of the valve body (1) is provided with a number of air inlets (12), and each air inlet (12) is connected to its adjacent air inlet (8).

7. A multi-channel, separately controlled gas turbine gas supply solenoid valve according to claim 1, characterized in that: Several chambers (13) are fixedly installed on the outside of the valve body (1). Each chamber (13) is connected to the arc-shaped groove A (3) adjacent to it. The gas outlet end of the chamber (13) is used to connect to the gas turbine fuel metal pipe.

8. A multi-channel, separately controlled gas turbine gas supply solenoid valve according to claim 1, characterized in that: The valve body (1) is also provided with a sealing ring cavity (14) that passes through several arc-shaped grooves B (4). Several sealing plates B (15) that slide along the sealing ring cavity (14) are installed inside the sealing ring cavity (14). The air supply pipe (6) passes through the sealing plate B (15) that is close to it and is fixedly connected to it.

9. A multi-channel, separately controlled gas turbine gas supply solenoid valve according to claim 2, characterized in that: The rotating plate (9) is fixedly connected to an "L"-shaped main control rod (16). A fixing block is fixedly installed on one side of the valve body (1). An elastic plate B is fixedly connected between the main control rod (16) and the fixing block. An electromagnetic control mechanism (17) is also provided on one side of the valve body (1). The electromagnetic control mechanism (17) includes an electromagnetic coil, a stationary iron core and a moving iron core. One end of the moving iron core forms an arc-shaped protrusion and abuts against the main control rod (16).

10. A multi-channel, separately controlled gas turbine gas supply solenoid valve according to claim 9, characterized in that: The valve body (1), rotating plate (9) and main control rod (16) are located on the same axis.

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