A temperature detection and regulation device in a gas turbine combustion chamber

Abstract

The present invention discloses a temperature detection and regulation device in a gas turbine combustion chamber, which relates to the technical field of temperature detection. It includes a compressor, a combustion section is installed on one side of the compressor, a turbine is installed on one side of the combustion section, and a plurality of combustion tubes with equal distances between each other are installed on one side of the combustion section. A processing tube is fixedly installed on the outer circle of the combustion section. In this temperature detection and regulation device in the gas turbine combustion chamber, if the thermally expandable material gradually expands due to excessive temperature, it will block through the cavity, causing the first piston to slide along the sliding cavity, and then driving the connecting pipe to move the sliding rheostat. After the resistance value of the sliding rheostat increases, the opening degree of the solenoid valve on the main pipeline decreases, and then the jet pressure of the main pipeline or the amount of other materials is reduced, changing the value of the dependent variable, reducing the temperature of the device, improving the automatic regulation ability of the device, providing guarantee for emergency rescue of some circuits, and not requiring manual participation.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature regulation and control, and specifically relates to a temperature detection and regulation device in a gas turbine combustion chamber. Background Art

[0002] The temperature at the combustion chamber outlet is an important performance index of a gas turbine and is an important state parameter for the combustion control and adjustment of a low-emission combustion chamber. When the gas turbine is operating, the working state of the low-emission combustion chamber can be judged by the magnitude of the temperature at the combustion chamber outlet, and then the mixing ratio of fuel and air can be adjusted to achieve the purpose of low emissions of the gas turbine. With the development of gas turbines, the temperature at the combustion chamber outlet has gradually increased. The traditional calculation method for the temperature at the combustion chamber outlet of a gas turbine is generally based on the energy balance equation of the combustion chamber. When calculating, it depends on component characteristics and requires atmospheric temperature, compressor inlet pressure, compressor pressure ratio, compressor efficiency, air system bleed air volume, fuel flow rate, and combustion efficiency. There are many parameters and none of them can be missing. When the combustion section of the combustion chamber is working, when a detection line fault occurs in the electrical well part or when the operator temporarily leaves the post, the operator cannot give various indicators at the back end in a short time. Generally, the temperature inside the combustion chamber is affected by the fuel injection volume, injection pressure, and fuel ratio of the nozzle. When a branch line fault occurs, it is necessary for the operator to go to the site for inspection, and the operator cannot timely regulate the temperature of the combustion chamber according to the actual situation; someone needs to be on duty 24 hours a day, increasing the labor burden. Therefore, we propose a temperature detection and regulation device in a gas turbine combustion chamber. Summary of the Invention

[0003] The purpose of the present invention is to provide a temperature detection and regulation device in a gas turbine combustion chamber to solve the problems raised in the above background art.

[0004] To achieve the above object, the present invention provides the following technical solution: A temperature detection and regulation device in a gas turbine combustion chamber, including a compressor, a combustion section is installed on one side of the compressor, a turbine is installed on one side of the combustion section, and a plurality of combustion tubes with equal distances between each other are installed on one side of the combustion section. A bias tube is fixedly installed at one end of the combustion section, one end of the bias tube is fixedly connected to a suction tube, one end of the suction tube is fixedly installed with a processing tube, an air inlet is provided at the outer end of the processing tube, and an air outlet is provided at the other outer end of the processing tube. An air flow distribution channel is provided at the bottom of the air inlet of the processing tube, and a first distribution hole is provided on the side of the air flow distribution channel. A sliding cavity is provided at the bottom of the air outlet; moreover, the air flow distribution channel is communicated with the first distribution hole through the sliding cavity, a first piston is slidably connected to the sliding cavity, a pair of through cavities are provided on the first piston, and an opening and closing cavity is installed in the middle of each through cavity. The opening and closing cavity is filled with a thermal expansion material. When hot air enters the sliding cavity, it penetrates into the first distribution hole and impacts the inside of the opening and closing cavity, driving the first piston to slide along the inside of the sliding cavity; a fixed tube is fixedly installed on one side of the first piston, a connecting tube extending outside the processing tube is installed at one end of the fixed tube, and a sliding rheostat is rotatably connected to one end of the connecting tube. The sliding rheostat is electrically connected to the combustion tube; a gas reset structure for releasing the gas inside the sliding cavity is installed at the top of the air outlet. The gas reset structure includes a pressure chamber installed at the top of the air outlet, a third spring is installed at the inner top of the pressure chamber, a second piston is suspended at one end of the third spring, a return pipeline is connected to the middle of the pressure chamber, and one end of the return pipeline is connected to the inside of the turbine; a first spring is installed at the bottom of the air flow distribution channel, a moving ball is fixedly connected to one end of the first spring, a second spring is installed inside the fixed tube at one end of the connecting tube, and a movable ball is fixedly connected to one end of the second spring. The bottom of the air flow distribution channel is communicated with a second distribution hole.

[0005] Preferably, the number of the combustion tubes is at least six, and the multiple combustion tubes are divided into two groups that are symmetric with each other about the axis of the combustion section. A distribution pipeline is installed at one end of each group of combustion tubes, one end of the distribution pipeline is connected to a main pipeline, and an electromagnetic valve is fixedly installed on each main pipeline. Moreover, the electromagnetic valve and the sliding rheostat are connected by an electric circuit.

[0006] Preferably, a thermocouple connected to a temperature tester is installed between the suction tube and the processing tube. Moreover, the thermocouple is hermetically fixed to the suction tube through a flange.

[0007] Preferably, a steam inlet pipe is installed outside the combustion section near the suction tube, and the steam inlet pipe is electrically connected to the sliding rheostat.

[0008] Preferably, the air flow distribution channel is divided into two sections, the upper section having a smaller diameter than the lower section, and the moving ball is slidably connected to the lower section of the air flow distribution channel.

[0009] Preferably, an air vent connected to the fixed tube is provided at one end of the connecting tube, and the air vent is transmission-connected to the sliding rheostat.

[0010] Preferably, a drainage hole is provided inside the combustion section near the bottom of the suction pipe.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention installs a processing tube on the outer ring of the combustion section. When the ignition temperature inside the combustion section gradually rises, the high-temperature gas pressure inside the combustion section rushes to the top, enters the air flow distribution channel through the air inlet, and then enters the first distribution hole. Then, the high-temperature gas pressure contacts the first piston, and the gas enters the thermal expansion material inside the cavity. If the thermal expansion material is subjected to excessive temperature, it gradually expands and blocks the cavity, causing the first piston to slide along the sliding cavity. Then, the connecting tube is driven to move the slice of the sliding rheostat. After the resistance value of the sliding rheostat increases, the opening and closing degree of the solenoid valve on the main pipeline is reduced, and then the jet pressure or the amount of other materials in the main pipeline is reduced, thereby changing the value of the dependent variable, reducing the temperature of the device, and improving the automatic control capability of the device, providing protection for emergency rescue of some lines without the need for human intervention;

[0013] 2. The present invention also installs a steam inlet pipe on the outer ring of the combustion section to facilitate the backflow of the gas discharged from the combustion section, which plays a preheating role inside the combustion section and prevents the machine from starting slowly when it is not in use;

[0014] 3. The present invention installs an air pressure chamber on the processing tube. When the third spring is reset, the gas between the sliding cavity and the air pressure chamber is driven to reversely drive the first piston to reset, thereby changing and reducing the resistance value of the sliding rheostat, and then increasing the jet pressure of the main pipeline or the amount of other materials, thereby increasing the internal temperature of the combustion section, and at the same time gradually increasing the amount of reflux steam entering the steam inlet pipe, thereby achieving a rapid heating effect, improving the performance of the device, and bringing convenience to the production of electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the internal structure of the processing tube of the present invention;

[0017] Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0018] Figure 4Schematic diagram of the internal structure of the combustion section of the present invention;

[0019] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure at position B in the present invention;

[0020] Figure 6 Schematic diagram of the gas reset structure of the present invention;

[0021] Figure 7 For the present invention Figure 4 Schematic diagram of the enlarged structure at position C in the present invention;

[0022] Figure 8 Schematic diagram of the specific working process of the present invention.

[0023] In the figure: 1 - compressor; 2 - combustion section; 3 - turbine; 4 - combustion tube; 5 - distribution pipeline; 6 - main pipeline; 7 - solenoid valve; 8 - rheostat; 9 - treatment tube; 901 - air inlet; 902 - air outlet; 903 - sliding cavity; 904 - suction tube; 905 - offset tube; 906 - first distribution hole; 10 - air pressure chamber; 11 - steam inlet pipe; 12 - return pipeline; 13 - thermocouple; 14 - air flow distribution channel; 15 - first spring; 16 - first piston; 17 - fixed tube; 1701 - second spring; 18 - connecting tube; 19 - movable ball; 20 - second distribution hole; 21 - through cavity; 22 - opening and closing cavity; 23 - second piston; 24 - third spring. Specific implementation mode

[0024] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0025] Please refer to Figures 1-8, the present invention provides a technical solution: a temperature detection and regulation device in a gas turbine combustion chamber, including a compressor 1, a combustion section 2 is installed on one side of the compressor 1, and a turbine 3 is installed on one side of the combustion section 2. It is characterized in that: a plurality of combustion tubes 4 with equal distances between each other are installed on one side of the combustion section 2. A bias tube 905 is fixedly installed at one end of the combustion section 2. One end of the bias tube 905 is fixedly connected to a suction tube 904. One end of the suction tube 904 is fixedly installed with a processing tube 9. An air inlet 901 is opened at the outer end of the processing tube 9, and an air outlet 902 is opened at the other outer end of the processing tube 9. An air flow distribution channel 14 is opened at the bottom of the air inlet 901 of the processing tube 9. A first distribution hole 906 is opened at the side of the air flow distribution channel 14. A sliding cavity 903 is opened at the bottom of the air outlet 902. When the device is started, the combustion tubes 4 on the combustion section 2 are ignited to drive the turbine 3 to rotate and generate electricity for the generator. During the startup process or when the device has a line fault, since the temperature inside the combustion section 2 gradually rises and the internal air pressure increases, the air pressure can enter the suction tube 904 and gradually rise along the inner wall of the suction tube 904 into the processing tube 9. Then the gas enters the air inlet 901 into the air flow distribution channel 14, and the high-temperature gas enters the first distribution hole 906 and enters the sliding cavity 903 for storage;

[0026] As an example, the air flow distribution channel 14 is communicated with the sliding cavity 903 through the first distribution hole 906. A first piston 16 is slidably connected to the sliding cavity 903. A pair of through cavities 21 are opened on the first piston 16. An opening and closing cavity 22 is installed in the middle of each through cavity 21. The opening and closing cavity 22 is filled with a thermal expansion material. When hot air enters the sliding cavity 903, it penetrates into the first distribution hole 906 and impacts the inside of the opening and closing cavity 22, driving the first piston 16 to slide along the inside of the sliding cavity 903. Before the thermal expansion material expands, it is placed inside the opening and closing cavity 22 without contacting the inner wall of the opening and closing cavity 22, facilitating the gas to enter from one end of the first piston 16 to the other end and into the sliding cavity 903. During this process, a part of the gas can drive the first piston 16 a certain distance. Subsequently, after the thermal expansion material expands completely, the gas on both sides of the first piston 16 is unbalanced, enabling the gas located inside the first distribution hole 906 to drive the first piston 16 to slide completely within the sliding cavity 903;

[0027] The thermal expansion material can also be one of the expansion fireproof glue, sealing tape, fireproof ring and hollow ball used for fire protection. When the hollow ball is heated, the gas inside expands and the volume increases. When it cools, the gas inside contracts and the volume decreases;

[0028] As an example, a fixed pipe 17 is fixedly installed on one side of the first piston 16. One end of the fixed pipe 17 is provided with a connecting pipe 18 extending outside the processing pipe 9. One end of the connecting pipe 18 is rotatably connected to a sliding rheostat 8. The sliding rheostat 8 is electrically connected to the combustion pipe 4. When the first piston 16 slides in the sliding cavity 903, the first piston 16 can drive the fixed pipe 17 and the connecting pipe 18 to move towards the outside of the processing pipe 9. During the movement of the fixed pipe 17 and the connecting pipe 18, the resistance value of the sliding rheostat 8 increases, reducing the medium and materials entering the combustion pipe 4, and reducing the excessive temperature of the combustion section 2 caused by too much medium and materials, thereby affecting the use of the machine and causing the turbine 3 to surge.

[0029] Specifically, a gas reset structure for the gas inside the sliding cavity 903 is installed at the top of the air outlet 902. The gas reset structure includes a pneumatic chamber 10 installed at the top of the air outlet 902. A third spring 24 is installed at the inner top of the pneumatic chamber 10. One end of the third spring 24 is suspended with a second piston 23. The middle of the pneumatic chamber 10 is connected with a return pipe 12. One end of the return pipe 12 is connected to the inside of the turbine 3. When the temperature of the combustion section 2 decreases after being regulated, the third spring 24 rebounds and resets to drive the second piston 23 to reset. During the reset process of the second piston 23, the gas in the sliding cavity 903 and the bottom of the second piston 23 is squeezed, so that after the second piston 23 resets, the temperature of the thermal expansion material slowly returns to the previous state during the temperature reduction process. The pneumatic chamber 10, the sliding cavity 903 and the air flow distribution channel 14 can reach the previous gas balance state. During this process, the sliding rheostat 8 decreases, increasing the medium and materials entering the combustion pipe 4 and raising the internal temperature of the combustion section 2 to make the machine reach a balanced state.

[0030] A bias pipe 905 is fixedly installed at the bottom of the suction pipe 904. One end of the bias pipe 905 faces the inside of the combustion section 2. In order to assist the suction pipe 904 to absorb a relatively high temperature beside the combustion pipe 4, the bias pipe 905 is arranged close to the combustion pipe 4.

[0031] A first spring 15 is installed at the bottom of the air flow distribution channel 14. One end of the first spring 15 is fixedly connected to a moving ball. One end of the connecting pipe 18 is installed with a second spring 1701 inside the fixed pipe 17. One end of the second spring 1701 is fixedly connected to a movable ball 19. The bottom of the air flow distribution channel 14 communicates with a second distribution hole 20. When high-temperature gas enters the suction pipe 904, the air pressure increases, causing the moving ball to compress the first spring 15, exposing the position of the second distribution hole 20, increasing the air flow rate, and assisting the gas to push the first piston 16. At the same time, when the thermally expandable material expands due to heat, the gas between the first piston 16 and the first distribution hole 906 cannot be discharged. Therefore, the movable ball 19 can compress the second spring 1701 when the gas cannot be discharged, and instantaneously discharge part of the gas through the fixed pipe 17 to the outside of the connecting pipe 18 in a short time. Then, as the resistance value of the sliding rheostat 8 increases, the medium and material entering the combustion tube 4 are reduced, and after the temperature of the machine body is lowered, the air pressure chamber 10 needs to be balanced, and the thermally expandable material returns to its original position, and the second spring 170 gradually returns to its original position. Therefore, the elastic coefficient of the second spring 1701 needs to be greater than that of the first spring 15.

[0032] As an example, the number of the combustion tubes 4 is at least six, and the multiple combustion tubes 4 are divided into two groups that are axisymmetric with respect to the axis of the combustion section 2. One end of each group of combustion tubes 4 is installed with a distribution pipeline 5. One end of the distribution pipeline 5 is connected to a main pipeline 6. Each main pipeline 6 is fixedly installed with an electromagnetic valve 7, and the electromagnetic valve 7 and the sliding rheostat 8 are connected by an electric circuit. In one embodiment, the gas injection volume can be connected to one end of the main pipeline 6.

[0033] In the second embodiment, the gas injection pressure can be connected to one end of the main pipeline 6.

[0034] In the third embodiment, the fuel ratio can be connected to one end of the main pipeline 6.

[0035] When the electromagnetic valve 7 works, it is connected to the sliding rheostat 8. The size of the resistance value of the sliding rheostat 8 has a linear relationship with the suction strength of the magnetic head of the electromagnetic valve 7.

[0036] A thermocouple 13 connected to the temperature tester is installed between the suction pipe 904 and the processing pipe 9. The thermocouple 13 is fixedly sealed on the suction pipe 904 through a flange to assist manual data reading on site. When necessary, each valve can be manually adjusted to bring convenience to the on-site construction.

[0037] An inlet pipe 11 for steam is installed outside the combustion section 2 near the suction pipe 904. The inlet pipe 11 for steam is electrically connected to the sliding rheostat 8. Another solenoid valve needs to be installed on the inlet pipe 11 for steam. This solenoid valve... The solenoid valve 7 on the main pipeline 6 and the solenoid valve on the inlet pipe 11 for steam are in parallel. The current distribution for the two is different. The current passing through the solenoid valve 7 on the main pipeline 6 needs to be greater than the current passing through the solenoid valve on the inlet pipe 11 for steam. This is because the solenoid valve 7 on the main pipeline 6 needs to do more work and can be connected to different media simultaneously. Additionally, the inlet pipe 11 for steam needs to absorb the exhausted gas, and the flow rate also needs to be controlled by a solenoid valve to prevent excessive gas backflow from disturbing the gas in the turbine 3 compartment. One end of the inlet pipe 11 for steam can be connected to one end of the turbine 3.

[0038] The air flow distribution channel 14 is divided into upper and lower sections, and the diameter of the upper section is smaller than that of the lower section. The moving ball is slidably connected to the lower section of the air flow distribution channel 14, facilitating the moving ball to easily block the air flow distribution channel 14 directly.

[0039] A drainage hole is provided at the bottom of the combustion section 2 near the suction pipe 904 to stabilize the gas flow direction in the combustion section 2 and facilitate the bias pipe 905 to suck.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article or device.

[0041] As used herein, unless otherwise specified, the use of ordinal numbers "first", "second", "third", etc. to describe ordinary objects only indicates different instances of similar objects and does not intend to imply that the objects so described must have a given order in terms of time, space, ranking or any other way.

[0042] Although the present invention has been described in terms of a limited number of embodiments, those skilled in the art in this technical field will understand that other embodiments can be conceived within the scope of the present invention as thus described. Additionally, it should be noted that the language used in this specification is mainly selected for readability and teaching purposes rather than for explaining or limiting the subject matter of the present invention.

Claims

1. A temperature detection and regulation device in a gas turbine combustion chamber, comprising a compressor (1), a combustion section (2) is installed on one side of the compressor (1), and a turbine (3) is installed on one side of the combustion section (2), characterized in that: On one side of the combustion section (2), a plurality of combustion tubes (4) with equal distances between them are installed. At one end of the combustion section (2), an offset tube (905) is fixedly installed. One end of the offset tube (905) is fixedly connected to a suction tube (904). One end of the (904) is fixedly installed with a treatment tube (9). An air inlet (901) is opened at the outer end of the treatment tube (9), and an air outlet (902) is opened at the other outer end of the treatment tube (9). An air flow distribution channel (14) is opened at the bottom of the air inlet (901) of the treatment tube (9). A first distribution hole (906) is opened at the side of the air flow distribution channel (14). A sliding cavity (903) is opened at the bottom of the air outlet (902). Moreover, the air flow distribution channel (14) is communicated with the first distribution hole (906) through the sliding cavity (903). A first piston (16) is slidably connected to the sliding cavity (903). A pair of through cavities (21) are opened on the first piston (16). An opening and closing cavity (22) is installed in the middle of each through cavity (21). The opening and closing cavity (22) is filled with a thermal expansion material. The thermal expansion material has a reset function. When hot air enters the sliding cavity (903), it penetrates into the first distribution hole (906) and impacts the inside of the opening and closing cavity (22), driving the first piston (16) to slide inside the sliding cavity (903). A fixed tube (17) is fixedly installed on one side of the first piston (16). One end of the fixed tube (17) is installed with a connecting tube (18) extending outside the treatment tube (9). One end of the connecting tube (18) is rotatably connected to a sliding rheostat (8). The sliding rheostat (8) and the combustion tube (4) are electrically connected together. At the top of the air outlet (902), a gas reset structure for releasing the gas inside the sliding cavity (903) is installed. The gas reset structure includes a pneumatic chamber (10) installed at the top of the air outlet (902). A third spring (24) is installed at the inner top of the pneumatic chamber (10). One end of the third spring (24) is suspended with a second piston (23). The middle of the pneumatic chamber (10) is connected with a return pipeline (12). One end of the return pipeline (12) is connected to the inside of the turbine (3). A first spring (15) is installed at the bottom of the air flow distribution channel (14). One end of the first spring (15) is fixedly connected to a moving ball. One end of the connecting tube (18) is installed inside the fixed tube (17) with a second spring (1701). One end of the second spring (1701) is fixedly connected to a movable ball (19). The bottom of the air flow distribution channel (14) is communicated with a second distribution hole (20). The number of the combustion tubes (4) is at least six. Moreover, the multiple combustion tubes (4) are divided into two groups that are symmetric with each other about the axis of the combustion section (2). One end of each group of combustion tubes (4) is installed with a distribution pipeline (5). One end of the distribution pipeline (5) is connected to a main pipeline (6). An electromagnetic valve (7) is fixedly installed on each main pipeline (6). Moreover, the electromagnetic valve (7) and the sliding rheostat (8) are connected by an electric circuit.

2. The temperature detection and regulation device in the combustion chamber of a gas turbine according to claim 1, characterized in that: A thermocouple (13) connected to a temperature tester is installed between the suction pipe (904) and the treatment pipe (9), and the thermocouple (13) is fixedly sealed on the suction pipe (904) through a flange.

3. The temperature detection and regulation device in the combustion chamber of a gas turbine according to claim 1, characterized in that: A steam inlet pipe (11) is installed outside the combustion section (2) near the suction pipe (904), and the steam inlet pipe (11) is electrically connected to a sliding rheostat (8).

4. A temperature detection and regulation device in a gas turbine combustion chamber according to claim 1, characterized in that: The air flow distribution channel (14) is divided into upper and lower sections, and the diameter of the upper section is smaller than that of the lower section. The moving ball is slidably connected to the lower section of the air flow distribution channel (14).

5. A temperature detection and regulation device in a gas turbine combustion chamber according to claim 1, characterized in that: One end of the connecting pipe (18) is provided with a vent hole for connecting the fixed pipe (17), and the vent hole is drivingly connected to the sliding rheostat (8).

6. A temperature detection and regulation device in a gas turbine combustion chamber according to claim 1, characterized in that: A drainage hole is provided at the bottom inside the combustion section (2) near the suction pipe (904).

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