Gas power generation concentration self-adaptive voltage stabilizing device

Abstract

The present application relates to gas power generation technical field, specifically to a kind of gas power generation concentration self-adaptive voltage stabilizing device, applied to gas source is transported to the gas supply pipeline of gas generator set, including main regulating valve, it is set on the gas supply pipeline, movable valve core is arranged in the main regulating valve, for adjusting the gas supply flow of gas supply pipeline;Heat value sensing component, it is set in sampling pipe, the inlet end of the sampling pipe is communicated with gas supply pipeline, the outlet end of the sampling pipe is communicated with external environment, to form the gas flow in the sampling pipe through the surface of heat value sensing component.This application realizes the full mechanical type, self-adaptive regulation of gas flow, simplifies system structure, reduces cost, while realizing the automatic cleaning of heat bimetallic spiral belt, ensures the long-term use performance of heat bimetallic spiral belt, and hysteresis is small, can respond to the rapid fluctuation of gas concentration in time.

Description

Technical Field

[0001] This invention relates to the field of gas power generation technology, and more specifically to a gas power generation concentration adaptive voltage stabilization device. Background Technology

[0002] Methane-fired power generation utilizes coal mine methane for combustion, the main component of which is methane, to drive a gas-fired generator set to generate electricity. However, the concentration and pressure of the methane source, especially the extracted methane, are often unstable and fluctuate frequently due to factors such as coal mining operations and geological conditions. Gas-fired generator sets have strict requirements for the concentration of inlet methane; excessively high concentrations may lead to deflagration and increased unit vibration, while excessively low concentrations may cause ignition difficulties, reduced power output, or even shutdown.

[0003] Existing technologies typically employ independent concentration sensors to detect methane concentration, and then a controller adjusts the opening of regulating valves based on the concentration signal to maintain stable methane concentration and pressure entering the unit. While this electronic control method offers high precision, its complex system structure, comprising multiple components such as sensors, controllers, and actuators, results in high costs. Furthermore, in harsh environments such as underground mines, the electronic equipment is susceptible to moisture and vibration, leading to reduced reliability and a significant maintenance workload. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a gas power generation concentration adaptive voltage stabilization device, which can effectively solve the problems of complex structure, high cost, and poor reliability in harsh environments of existing electronic control voltage stabilization systems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a gas power generation concentration adaptive voltage stabilization device, applied to a gas supply pipeline for transporting gas to a gas generator set, comprising: A main regulating valve is installed on the gas supply pipeline, and a movable valve core is installed inside the main regulating valve for regulating the gas supply flow rate of the gas supply pipeline. A calorific value sensing component is installed inside a sampling tube. The inlet end of the sampling tube is connected to a gas supply pipe, and the outlet end of the sampling tube is connected to the external environment, so as to form a gas flow that passes through the surface of the calorific value sensing component inside the sampling tube. The transmission component has its first end connected to the movable part of the heat value sensing component and its second end connected to the valve core. Specifically, when the gas concentration flowing through the surface of the calorific value sensing component decreases, the drive valve core moves in the direction of increasing the opening of the main regulating valve; when the gas concentration flowing through the surface of the calorific value sensing component increases, the drive valve core moves in the direction of decreasing the opening of the main regulating valve.

[0006] Furthermore, the calorific value sensing component is a thermal bimetallic spiral strip extending along the axial direction of the sampling tube; One end of the thermal bimetallic spiral strip is a fixed end, which is fixed to the inner wall of the sampling tube, and the other end of the thermal bimetallic spiral strip is a free end, which constitutes a movable part and is connected to the first end of the transmission component.

[0007] Furthermore, the inlet end of the sampling tube is positioned facing the direction of gas flow in the gas supply pipeline; The inner wall of the sampling tube is provided with a spiral guide groove, and the spiral direction of the spiral guide groove is opposite to the spiral direction of the hot bimetallic spiral strip when the concentration decreases.

[0008] Furthermore, the main regulating valve also includes a valve seat and an elastic reset member. The valve core is movably disposed in the valve seat. One end of the elastic reset member abuts against the valve core, and the other end abuts against the valve seat, for applying a preload force to the valve core to make it tend to reduce the opening of the main regulating valve.

[0009] Furthermore, a perforation is provided on the side wall of the sampling tube, and the first end of the transmission component passes through the perforation and is connected to the movable part of the calorific value sensing component; An isolation sleeve is provided inside the perforation. One end of the isolation sleeve is sealed to the wall of the perforation, and the other end of the isolation sleeve is connected to the gas supply pipe.

[0010] Furthermore, the transmission component is a connecting rod inside a sealed cavity, which is disposed within a sealed cavity formed by the isolation sleeve and the wall of the perforated hole.

[0011] Furthermore, the transmission component includes a first transmission rod, a second transmission rod, and a heat-insulating connecting block connecting the first transmission rod and the second transmission rod; The end of the first transmission rod away from the heat insulation connecting block constitutes the first end, which is connected to the movable part of the heat value sensing component; The end of the second transmission rod furthest from the heat-insulating connecting block forms the second end, which is connected to the valve core; The thermal conductivity of the heat-insulating connecting block is lower than that of the first transmission rod and the second transmission rod.

[0012] Furthermore, the main regulating valve also includes a valve port bushing disposed within the valve seat, wherein the inner circumferential surface of the valve port bushing is a tapered sealing surface that gradually narrows along the gas flow direction. The outer circumferential surface of the valve core is a tapered mating surface adapted to the tapered sealing surface; The conical sealing surface has multiple axially extending pressure relief grooves along the circumferential direction, and the cross-sectional area of ​​the pressure relief grooves gradually decreases along the gas flow direction.

[0013] Furthermore, an axially extending guide rod is provided inside the sampling tube, between the fixed end and the free end of the thermal bimetallic spiral strip; The hot bimetallic spiral strip is sleeved on the outside of the guide core rod, and a gap is left between the inner edge of the hot bimetallic spiral strip and the outer peripheral surface of the guide core rod. The outer circumferential surface of the guide core rod is provided with spiral buffer fins, and the spiral direction of the buffer fins is the same as the twisting direction of the hot bimetallic spiral strip when the concentration changes.

[0014] The technical solution provided by this invention has the following advantages compared with the known prior art: 1. In this invention, the calorific value sensing component, i.e., the bimetallic spiral belt, directly senses the temperature change caused by the change in gas concentration, and directly drives the valve core through the transmission component, realizing a fully mechanical and adaptive adjustment of gas flow. It does not require external power supply, sensors, controllers and actuators, which simplifies the system structure and reduces costs.

[0015] 2. In this invention, a spiral guide groove is provided. When the gas flow is flowing at high speed in the sampling tube, it will be guided by the spiral guide groove to generate rotation. This rotating airflow will continuously wash the surface of the hot bimetallic spiral belt, roll up the condensate or impurities attached to the surface of the hot bimetallic spiral belt, realize automatic cleaning, and ensure the long-term performance of the hot bimetallic spiral belt.

[0016] 3. Since no electronic components are included in this invention, it is suitable for harsh environments such as underground coal mines that are humid, dusty, vibrating, and contain explosive gases. It is not easily affected by environmental factors, operates stably and reliably, and requires minimal maintenance.

[0017] 4. In this invention, the calorific value sensing component is directly installed in the sampling tube and comes into direct contact with the gas flow. Temperature changes can be quickly sensed and converted into mechanical displacement. The adjustment action is direct, with little lag, and can respond promptly to rapid fluctuations in gas concentration. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the gas supply pipeline and sampling pipe structure in this invention; Figure 3This is a schematic diagram of the internal structure of the gas supply pipeline and sampling pipe in this invention. Figure 1 ; Figure 4 This is a schematic diagram of the internal structure of the gas supply pipeline and sampling pipe in this invention. Figure 2 ; Figure 5 This is a schematic diagram of the internal structure of the gas supply pipeline and sampling pipe in this invention. Figure 3 ; Figure 6 This is a schematic diagram of the guide core rod in this invention; Figure 7 This is an exploded view of the main regulating valve section of the present invention; Figure 8 This is a cross-sectional view of the valve seat and valve core structure in this invention.

[0020] Reference numerals: 1. Gas source; 2. Gas generator set; 3. Gas supply pipeline; 4. Main regulating valve; 41. Valve core; 42. Valve seat; 43. Elastic reset component; 44. Valve port bushing; 411. Conical mating surface; 441. Conical sealing surface; 442. Pressure relief groove; 5. Calorific value sensing component; 51. Sampling tube; 52. Bimetallic spiral band; 53. Guide core rod; 511. Spiral guide groove; 512. Perforation; 521. Fixed end; 522. Free end; 531. Buffer fin; 6. Transmission component; 61. Isolation sleeve; 62. Connecting rod inside the sealing cavity; 63. Sealing cavity; 65. First transmission rod; 66. Second transmission rod; 67. Thermal insulation connecting block; 71. Fixed rod; 72. Sliding bracket; 73. Compression spring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] The present invention will be further described below with reference to embodiments.

[0023] Reference Figures 1 to 8 An adaptive voltage stabilizing device for gas power generation is applied to a gas supply pipeline 3 that delivers gas source 1 to gas generator set 2, and includes a main regulating valve 4, a calorific value sensing component 5 and a transmission component 6.

[0024] Specifically, the main regulating valve 4 is installed on the gas supply pipeline 3, and its interior is equipped with a valve core 41 that can move axially. By changing the flow cross-sectional area between the valve core 41 and the valve seat, the gas supply flow rate of the gas supply pipeline 3 is adjusted.

[0025] A calorific value sensing component 5 is installed inside a sampling tube 51. The inlet end of the sampling tube 51 is connected to the gas supply pipe 3, and the outlet end of the sampling tube 51 is connected to the external environment. Due to the pressure difference between the two ends of the sampling tube 51, a continuous gas flow is formed inside the sampling tube 51, flowing over the surface of the calorific value sensing component 5. This allows the calorific value sensing component 5 to sense changes in the concentration of gas in the main gas flow in real time. The gas concentration directly determines its calorific value; the higher the concentration, the more heat is released during combustion under the same conditions, and the higher the gas flow temperature. Conversely, a lower concentration results in a lower gas flow temperature. Therefore, the calorific value sensing component 5 indirectly senses changes in gas concentration by sensing temperature.

[0026] The transmission component 6 is a mechanical transmission component, with its first end connected to the movable part of the heat value sensing component 5 and its second end connected to the valve core 41.

[0027] Specifically, the calorific value sensing component 5 is a bimetallic spiral strip 52 extending along the axial direction of the sampling tube 51. The bimetallic spiral strip 52 is composed of two layers of metal sheets with different coefficients of thermal expansion. The active layer, i.e., the high coefficient of expansion layer, is made of high manganese alloy, and the passive layer, i.e., the low coefficient of expansion layer, is made of Invar alloy. The spiral strip is rolled into a spiral shape. One end is a fixed end 521, which is fixedly connected to the inner wall of the sampling tube 51. The other end is a free end 522, which constitutes the aforementioned movable part and is connected to the first end of the transmission component 6.

[0028] In particular, the spiral structure of the calorific value sensing component 5 has an amplification effect on displacement. Compared with a flat bimetallic strip, under the same temperature change, the spiral structure can generate a larger axial stroke at the free end 522, thereby effectively amplifying the temperature sensing signal. This ensures that even small temperature fluctuations, such as a temperature change of ±2 degrees Celsius to ±5 degrees Celsius in the gas flow, can drive the transmission component 6 to generate a displacement sufficient to change the opening of the valve core 41. This effectively overcomes the problem that the small displacement of the calorific value sensing component 5 is easily canceled out by friction or valve core preload.

[0029] It should be noted that the characteristics of the thermal bimetallic spiral strip 52 are as follows: when the temperature changes, due to the different thermal expansion of its two metal layers, the thermal bimetallic spiral strip 52 will twist, thereby changing its spiral curvature radius. In this embodiment, when the gas concentration flowing through the surface of the thermal bimetallic spiral strip 52 decreases, resulting in a decrease in the airflow temperature, its spiral curvature radius increases, that is, the spiral becomes looser, causing the free end 522 to move axially towards the outlet end of the sampling tube 51, i.e., away from the fixed end 521; when the gas concentration increases, resulting in an increase in the airflow temperature, the spiral curvature radius of the thermal bimetallic spiral strip 52 decreases, that is, the spiral becomes tighter, driving the free end 522 to move axially towards the inlet end of the sampling tube 51, i.e., closer to the fixed end 521. The spiral structure of the thermal bimetallic spiral strip 52 efficiently converts the torsional motion of the thermal bimetallic strip into axial linear displacement, which facilitates the driving of the valve core 41.

[0030] It should also be noted that, considering the potential presence of moisture and impurities in the gas, this embodiment also incorporates a self-cleaning structure to prevent these substances from adhering to the surface of the hot bimetallic spiral belt 52 and affecting its sensitivity and lifespan. Specifically, the inlet end of the sampling tube 51 is oriented towards the gas flow direction within the gas supply pipe 3, i.e., facing the airflow direction. A spiral guide groove 511 is provided on the inner wall of the sampling tube 51. In particular, the rotation direction of the spiral guide groove 511 is designed to be opposite to the rotation direction of the hot bimetallic spiral belt 52 when the gas concentration decreases, i.e., the temperature decreases, causing the spiral belt to loosen. When the gas flow is flowing at high speed within the sampling tube 51, it will be guided by the spiral guide groove 511 and rotate. This rotating airflow continuously washes the surface of the hot bimetallic spiral belt 52, lifting up any condensate or impurities adhering to its surface and discharging them along the spiral guide groove 511 towards the outlet end of the sampling tube 51. This achieves automatic cleaning and ensures the long-term performance of the hot bimetallic spiral belt 52.

[0031] Specifically, the outlet end of the sampling tube 51 is connected to the external environment. To ensure a stable and continuous gas flow inside the tube, a flow-limiting and pressure-relief structure can be installed at the outlet end of the sampling tube 51 to control the outflow rate of the gas flow and prevent a sudden drop in pressure inside the sampling tube 51. At the same time, an anti-backflow one-way structure is configured to prevent external air or impurities from entering the sampling tube 51 in reverse, thereby avoiding interference with the sensing accuracy of the calorific value sensing component 5 for gas concentration. Furthermore, condensate and impurities carried by the gas flow can be smoothly discharged through the outlet end of the sampling tube 51.

[0032] Specifically, the main regulating valve 4 also includes a valve seat 42 and an elastic reset member 43. In this embodiment, the elastic reset member 43 includes several fixed rods 71 ​​fixedly connected to the valve seat 42, and a sliding bracket 72 slidably connected to the several fixed rods 71. Several compression springs 73 are fixedly connected between the sliding bracket 72 and the valve seat 42. The sliding bracket 72 is fixedly connected to the end of the valve core 41 away from the valve seat 42. The second transmission rod 66 is rotatably connected to the sliding bracket 72. The valve core 41 is movably disposed within the valve seat 42. The elastic reset member 43 always applies a preload force to the valve core 41, which tends to reduce the opening of the main regulating valve 4, i.e., tends to close the valve seat 42. When the heat sensing member 5 is cooled and elongated, the transmission member 6 pushes the valve core 41 to overcome the preload force of the elastic reset member 43, thereby increasing the opening of the valve seat 42. When the heat sensing member 5 is heated and contracted, the preload force of the elastic reset member 43 will push the valve core 41 back to its original position following the transmission member 6, thereby reducing the opening of the valve seat 42, thus ensuring the stability and reversibility of the valve opening and closing action.

[0033] It should be noted that, in order to prevent gas leakage from the location where the transmission component 6 passes through, an isolation sleeve 61 is installed inside the perforation 512 opened on the side wall of the sampling tube 51. The isolation sleeve 61 is made of nitrile rubber that is resistant to gas corrosion and high temperature, which is suitable for the harsh working conditions of coal mines that are humid and contain explosive gases. It avoids the problem of ordinary rubber aging or failing easily in harsh environments, and takes into account both sealing performance and environmental adaptability. One end of the isolation sleeve 61 is sealed to the wall of the perforation 512, and the other end is sealed to the outer circumference of the transmission component 6. The isolation sleeve 61 not only completely isolates the inside of the sampling tube 51 from the external environment to prevent gas leakage, but also allows the transmission component 6 to move within a certain range.

[0034] To further improve transmission flexibility and sealing performance, the transmission component 6 can be designed as a connecting rod 62 inside the sealed cavity. Specifically, the connecting rod 62 inside the sealed cavity is set inside the sealed cavity 63 formed by the isolation sleeve 61 and the hole wall of the through hole 512.

[0035] It should be noted that the ambient temperature of the pipeline where the main regulating valve 4 is located may be different from the temperature inside the sampling tube 51. To prevent the temperature on the valve core 41 side from being conducted to the calorific value sensing component 5 through the transmission component 6 and causing interference, in this embodiment, the transmission component 6 specifically includes a first transmission rod 65, a second transmission rod 66, and a heat-insulating connecting block 67 connected between the two. The heat-insulating connecting block 67 is slidably connected in a sealed cavity 63. The first transmission rod 65 is connected to the free end 522 of the calorific value sensing component 5, and the second transmission rod 66 is connected to the valve core 41. The heat-insulating connecting block 67 is made of a material with a thermal conductivity much lower than that of metal, such as ceramics or high-temperature resistant plastics. The heat-insulating connecting block 67 can effectively block the heat from the valve core 41 side from being transferred to the calorific value sensing component 5 side, ensuring that the calorific value sensing component 5 only senses the gas temperature inside the sampling tube 51, thereby improving the accuracy of gas concentration sensing.

[0036] It should also be noted that a transverse limiting groove 54 is provided on the side wall of the sampling tube 51. The end of the first transmission rod 65 connected to the free end 522 of the hot bimetallic spiral belt 52 is slidably engaged with the sampling tube 51 through the transverse limiting groove 54 to limit the torsional motion generated by the hot bimetallic spiral belt 52 when the spiral curvature changes, so that the free end 522 of the hot bimetallic spiral belt 52 can generate linear axial motion.

[0037] Specifically, to improve the flow control characteristics of the main regulating valve 4 under small opening conditions and avoid sudden pressure changes, the main regulating valve 4 also includes a valve port bushing 44 disposed in the valve seat 42. The inner circumferential surface of the valve port bushing 44 is a tapered sealing surface 441 that gradually narrows along the gas flow direction. Correspondingly, the outer circumferential surface of the valve core 41 is a tapered mating surface 411 that matches it. In particular, multiple axially extending pressure relief grooves 442 are provided on the tapered sealing surface 441 along the circumferential direction. The cross-sectional area of ​​the pressure relief grooves 442 is designed to gradually decrease along the gas flow direction. When the valve core 41 is at a small opening and the gap with the valve port bushing 44 is extremely small, this part of the gas can flow through the pressure relief grooves 442. Since the cross-sectional area of ​​the pressure relief grooves 442 is gradually narrowing, it can play a certain role in throttling and stabilizing pressure, so that even when the main regulating valve 4 is at a small opening, the downstream pressure can remain relatively stable, avoiding the phenomenon of drastic flow fluctuations caused by small displacement of the valve core.

[0038] It should be noted that under the impact of gas flow, the hot bimetallic spiral belt 52 may generate high-frequency micro-vibrations, which may not only generate noise but also affect its connection life with the transmission component 6. In this embodiment, an axially extending guide rod 53 is also provided inside the sampling tube 51 between the fixed end 521 and the free end 522 of the hot bimetallic spiral belt 52. The hot bimetallic spiral belt 52 is sleeved on the outside of the guide rod 53, and a small gap is left between the hot bimetallic spiral belt 52 and the guide rod 53 to avoid affecting the normal torsion of the hot bimetallic spiral belt 52 with temperature.

[0039] Specifically, a spiral buffer fin 531 is provided on the outer peripheral surface of the guide core rod 53. The spiral direction of the buffer fin 531 is the same as the twisting direction of the hot bimetallic spiral strip 52 when the concentration changes. When the airflow passes through, the buffer fin 531 guides the airflow to flow in a spiral shape, enhancing the heat exchange with the hot bimetallic spiral strip 52. On the other hand, when the hot bimetallic spiral strip 52 generates micro-vibration, its inner edge will have slight contact friction with the buffer fin 531, thereby absorbing the vibration energy and playing the role of suppressing high-frequency micro-vibration and stabilizing the position of the hot bimetallic spiral strip 52.

[0040] The working principle of this invention is as follows: When the gas concentration flowing through sampling pipe 51 decreases, the gas flow temperature decreases, and the calorific value sensing component 5 expands or elongates due to cooling. Specifically, the moving part of the calorific value sensing component 5 displaces. This displacement is transmitted to the valve core 41 via the transmission component 6, driving the valve core 41 to move in the direction of increasing the opening of the main regulating valve 4, thereby increasing the gas supply flow and maintaining a relatively stable total calorific value of the gas entering the generator set. Conversely, when the gas concentration increases, the gas flow temperature increases, and the calorific value sensing component 5 contracts or shortens due to heat. This, via the transmission component 6, drives the valve core 41 to move in the direction of decreasing the opening of the main regulating valve 4, reducing the gas supply flow. This achieves the function of automatically adjusting the intake flow according to the gas concentration and stabilizing the inlet calorific value of the generator set.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas power generation concentration adaptive voltage stabilizing device, applied to a gas supply pipeline (3) for conveying a gas source (1) to a gas generator set (2), characterized in that, include: A main regulating valve (4) is installed on the gas supply pipeline (3). The main regulating valve (4) is equipped with a movable valve core (41) for regulating the gas supply flow of the gas supply pipeline (3). A calorific value sensing component (5) is installed inside a sampling tube (51). The inlet end of the sampling tube (51) is connected to the gas supply pipe (3), and the outlet end of the sampling tube (51) is connected to the external environment, so as to form a gas flow that flows through the surface of the calorific value sensing component (5) inside the sampling tube (51). The transmission component (6) has its first end connected to the movable part of the heat value sensing component (5) and its second end connected to the valve core (41). When the gas concentration flowing through the surface of the calorific value sensing component (5) decreases, the drive valve core (41) moves in the direction of increasing the opening of the main regulating valve (4); when the gas concentration flowing through the surface of the calorific value sensing component (5) increases, the drive valve core (41) moves in the direction of decreasing the opening of the main regulating valve (4).

2. The gas power generation concentration adaptive voltage stabilizing device according to claim 1, characterized in that, The heat value sensing component (5) is a thermal bimetallic spiral strip (52) extending along the axial direction of the sampling tube (51); One end of the thermal bimetallic spiral strip (52) is a fixed end (521) which is fixed to the inner wall of the sampling tube (51). The other end of the thermal bimetallic spiral strip (52) is a free end (522), which constitutes a movable part and is connected to the first end of the transmission component (6).

3. The gas power generation concentration adaptive voltage stabilization device according to claim 2, characterized in that, The inlet end of the sampling tube (51) is positioned facing the gas flow direction in the gas supply pipe (3); The inner wall of the sampling tube (51) is provided with a spiral guide groove (511), and the spiral guide groove (511) has the opposite direction of rotation to the hot bimetallic spiral strip (52) when the concentration decreases.

4. The gas power generation concentration adaptive voltage stabilization device according to claim 1, characterized in that, The main regulating valve (4) also includes a valve seat (42) and an elastic reset member (43). The valve core (41) is movably disposed in the valve seat (42). One end of the elastic reset member (43) abuts against the valve core (41) and the other end abuts against the valve seat (42), and is used to apply a preload force to the valve core (41) to make it tend to reduce the opening of the main regulating valve (4).

5. The gas power generation concentration adaptive voltage stabilizing device according to claim 1, characterized in that, A perforation (512) is provided on the side wall of the sampling tube (51), and the first end of the transmission component (6) passes through the perforation (512) and is connected to the movable part of the calorific value sensing component (5). An isolation sleeve (61) is provided inside the perforation (512). One end of the isolation sleeve (61) is sealed to the wall of the perforation (512), and the other end of the isolation sleeve (61) is connected to the gas supply pipe (3).

6. The gas power generation concentration adaptive voltage stabilization device according to claim 5, characterized in that, The transmission component (6) is a connecting rod (62) inside the sealed cavity, which is set inside the sealed cavity (63) formed by the isolation sleeve (61) and the hole wall of the perforation (512).

7. The gas power generation concentration adaptive voltage stabilization device according to claim 1, characterized in that, The transmission component (6) includes a first transmission rod (65), a second transmission rod (66), and a heat-insulating connecting block (67) connecting the first transmission rod (65) and the second transmission rod (66); The end of the first transmission rod (65) away from the heat insulation connecting block (67) constitutes the first end, which is connected to the movable part of the heat value sensing component (5); The end of the second transmission rod (66) away from the heat insulation connecting block (67) constitutes the second end, which is connected to the valve core (41); The thermal conductivity of the heat-insulating connecting block (67) is lower than that of the first transmission rod (65) and the second transmission rod (66).

8. The gas power generation concentration adaptive voltage stabilizing device according to claim 1, characterized in that, The main regulating valve (4) also includes a valve port bushing (44) disposed in the valve seat (42), the inner circumferential surface of the valve port bushing (44) being a tapered sealing surface (441) that gradually narrows along the gas flow direction; The outer peripheral surface of the valve core (41) is a tapered mating surface (411) that is adapted to the tapered sealing surface (441); The conical sealing surface (441) has multiple axially extending pressure relief grooves (442) along the circumferential direction, and the cross-sectional area of ​​the pressure relief grooves (442) gradually decreases along the gas flow direction.

9. The gas power generation concentration adaptive voltage stabilization device according to claim 2, characterized in that, An axially extending guide rod (53) is also provided inside the sampling tube (51) between the fixed end (521) and the free end (522) of the hot bimetallic spiral strip (52); The thermal bimetallic spiral strip (52) is sleeved on the outside of the guide core rod (53), and there is a gap between the inner edge of the thermal bimetallic spiral strip (52) and the outer peripheral surface of the guide core rod (53). The outer circumferential surface of the guide core rod (53) is provided with a spiral buffer fin (531), and the spiral direction of the buffer fin (531) is the same as the twisting direction of the hot bimetallic spiral strip (52) when the concentration changes.

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