Energy-saving intelligent automatic air supplement system for ash conveying pipeline

Abstract

The utility model relates to an energy -conserving intelligent automatic air supplementing system of ash conveying pipeline, comprising an ash conveying pipeline, wherein the differential pressure of the pipeline between adjacent intelligent conveyors is used to directly drive the action of a cylinder, the opening and closing of an air supplementing valve is controlled through mechanical linkage, and the mechanical feedback mechanism based on pressure difference sensing is used to predict the risk of pipe blockage and open the air supplementing valve in time before the pipe blockage occurs, thereby significantly reducing the ash conveying resistance, effectively preventing the pipe blockage, keeping the ash conveying process in a low air demand state all the time, and achieving an energy saving effect of more than 50%.

Description

Technical Field

[0001] This utility model relates to the field of powder conveying technology, and in particular to an energy-saving intelligent automatic air replenishment system for ash conveying pipelines. Background Technology

[0002] In existing technologies, ash conveying pipelines typically employ air replenishment devices, such as purely mechanical air replenishment valves connected between pipelines. These valves are opened and closed by utilizing the pressure difference between their sampling ports to achieve air replenishment. While this approach can achieve basic air replenishment, it is essentially a passive response mechanism that only activates when a significant pressure difference is formed within the pipeline, i.e., when the material conveying resistance has increased. It cannot provide early warning or intervention before pipe blockage occurs, resulting in high energy consumption and the risk of pipe blockage.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model discloses an energy-saving intelligent automatic gas replenishment system for ash conveying pipelines, which solves the problem of high energy consumption and the risk of pipeline blockage caused by the inability to provide early warning and intervention before pipe blockage occurs.

[0005] The technical solution adopted in this utility model is as follows: An energy-saving intelligent automatic gas replenishment system for ash conveying pipelines, characterized in that it includes: The ash conveying pipeline has two ends connected to the main air source and the ash silo, respectively. Several silo pumps are connected in parallel to the end of the ash conveying pipeline near the main air source. Several intelligent conveyors are connected to the ash conveying pipeline. The ash conveying pipeline is also connected to a gas tracing pipeline. One end of the gas tracing pipeline is connected to the ash silo, and the other end is connected to the end of the ash conveying pipeline near the main air source. Several intelligent conveyors are connected to each other through the gas tracing pipeline. Each intelligent conveyor includes a cylinder seat, an upper valve body, a lower valve body, and a check valve body. The cylinder seat is connected to a cylinder. The drive end of the cylinder is connected to a plug, and the plug is also connected to the cylinder through a plug return spring. The plug seals the exhaust pipe opened on the upper valve body. The upper valve body also has a through hole communicating with the cylinder seat. The check valve body also has two sampling ports. One sampling port is connected to the high-pressure inlet on the lower side of the cylinder, and the other sampling port is connected to the low-pressure inlet on the upper side of the cylinder of the intelligent conveyor arranged adjacent to the main air source. The intelligent conveyor is configured to predict the risk of blockage based on the pressure in the ash conveying pipeline when a pressure difference occurs between two adjacent intelligent conveyors. When the risk is predicted, the pressure difference drives the cylinder to act. Through the cooperation of the plug and the exhaust pipe, the pressure balance between the upper and lower valve bodies is controlled, and the check valve core is opened to achieve automatic air replenishment to the ash conveying pipeline.

[0006] A further technical solution is that the silo pump is further configured to simultaneously limit the feeding speed to the ash conveying pipe when the risk of pipe blockage is anticipated, and to coordinate with the opening action of the intelligent conveyor to perform anti-blockage control.

[0007] A further technical solution is that the logic of the intelligent conveyor to predict the risk of pipe blockage is to determine whether the value of the pressure difference of the ash conveying pipeline exceeds a first preset threshold, and / or to determine whether the rate of increase of the pressure difference of the ash conveying pipeline exceeds a second preset threshold.

[0008] A further technical solution is that the intelligent conveyor is also configured to activate the unblocking mode when it is determined that the anti-blocking has failed and the pipeline is blocked, and to perform continuous or pulsed gas replenishment until the pipeline pressure is restored to the normal range.

[0009] A further technical solution is that a pneumatic discharge valve is also provided on the ash conveying pipeline, and the pneumatic discharge valve is connected to the end of the silo pump near the ash silo on the ash conveying pipeline.

[0010] A further technical solution is that the ash silo has three parts: a raw ash silo, a coarse ash silo, and a fine ash silo. The raw ash silo, the coarse ash silo, and the fine ash silo are connected in parallel to the end of the ash conveying pipeline. The top of the raw ash silo is connected to the ash conveying pipeline through a switching valve. The top of the coarse ash silo is connected to the ash conveying pipeline through a switching valve. The top of the fine ash silo is connected to the ash conveying pipeline through an ash discharge box.

[0011] A further technical solution is that the intelligent conveyor is short-circuited and inserted at an angle into the ash conveying pipeline during installation, and the angle between the intelligent conveyor and the ash conveying pipeline is 35°-45°.

[0012] A further technical solution is that a manual ball valve is connected at the connection between the intelligent conveyor and the gas tracing pipeline.

[0013] A further technical solution is that the main gas source also includes a gas source pipeline. The first end of the gas source pipeline is connected to the main gas source. The first ends of the ash conveying pipeline and the accompanying gas pipeline are respectively provided with a manual ball valve, a pneumatic ball valve and a check valve. The first ends of the ash conveying pipeline and the accompanying gas pipeline are connected to the end of the gas source pipeline. The gas source pipeline is respectively provided with a manual ball valve, an oil and water removal filter and another manual ball valve. A secondary pipeline is also connected in parallel to the outside of the two manual ball valves. A manual ball valve is connected to the secondary pipeline.

[0014] The beneficial effects of this utility model embodiment are as follows: (I) An energy-saving intelligent automatic air replenishment system for ash conveying pipelines includes an ash conveying pipeline. The cylinder is directly driven by the pipeline pressure difference between adjacent intelligent conveyors. The opening and closing of the air replenishment valve is controlled by mechanical linkage. Based on the mechanical feedback mechanism of pressure difference sensing, the system predicts the risk of pipe blockage and opens the air replenishment valve in time before the blockage occurs. This significantly reduces the ash conveying resistance, effectively prevents pipeline blockage, and keeps the ash conveying process at a low air demand state, achieving an energy saving effect of more than 50%. At the same time, by avoiding the pressure shock and frequent unblocking operations caused by pipe blockage, the operational stability of the entire system is guaranteed, the equipment wear rate is greatly reduced, the service life is extended, and the maximum processing capacity of the system is guaranteed.

[0015] (ii) Furthermore, the silo pump is further configured to simultaneously limit the feeding speed to the ash conveying pipeline when a risk of pipe blockage is anticipated, and coordinate with the activation of the intelligent conveyor for anti-blockage control. The silo pump collaborative control mechanism directly reduces the ash concentration in the pipeline by limiting the feeding speed, while simultaneously cooperating with the intelligent conveyor to precisely replenish air and increase the material flow rate, forming a synergistic effect of reducing material and increasing air. This intervention addresses the source of conveying resistance, effectively eliminating the risk of pipe blockage and avoiding the waste of air volume caused by a single air replenishment method. This allows the system to maintain stable operation under the lowest energy consumption state, while significantly reducing the impact wear of equipment caused by pipe blockage.

[0016] (III) Furthermore, the intelligent conveyor is also configured to activate a blockage-clearing mode when the anti-blocking measure fails and the pipeline becomes blocked, providing continuous or pulsed air replenishment until the pipeline pressure returns to the normal range. When the anti-blocking measure fails and the pipeline is completely blocked, a significant pressure difference will occur before and after the blockage point. This pressure difference will drive the nearest intelligent conveyor to continuously or forcefully activate, providing high-intensity air replenishment to impact the blockage point until the blockage is cleared, the pipeline pressure returns to normal, and the intelligent conveyor automatically shuts off. The blockage-clearing control mechanism can automatically activate when the anti-blocking measures fail and the pipeline is completely blocked. By providing continuous or pulsed high-intensity air replenishment through the intelligent conveyor, a powerful air impact is formed, effectively disrupting the structural balance of the blockage material. This not only quickly clears the pipeline, avoiding the lag of manual intervention, but also automatically determines the timing of blockage clearance based on real-time pressure. Once the pressure returns to the normal range, air replenishment is immediately stopped and normal conveying begins. This ensures blockage clearance efficiency while minimizing air consumption, achieving autonomous diagnosis and rapid recovery from pipe blockage faults. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the pipe layout of an energy-saving intelligent automatic air replenishment system for ash conveying pipelines according to this utility model.

[0018] Figure 2 This is a top view of the pipe layout of an energy-saving intelligent automatic air replenishment system for ash conveying pipelines according to this utility model.

[0019] Figure 3 This is a front view schematic diagram of the ash silo in an energy-saving intelligent automatic air replenishment system for ash conveying pipelines according to this utility model.

[0020] Figure 4 for Figure 1 Enlarged view at point A.

[0021] Figure 5 for Figure 1 Enlarged view at point B.

[0022] Figure 6 for Figure 2 Enlarged view at point C.

[0023] In the picture: 100. Ash conveying pipeline; 101. Pneumatic discharge valve; 201. Raw ash silo; 202. Coarse ash silo; 203. Fine ash silo; 204. Switching valve; 205. Ash unloading box; 300. Silo pump; 400. Intelligent conveyor; 500. Tracing air pipeline; 600. Manual ball valve; 700. Air source pipeline; 701. Secondary pipeline; 800. Pneumatic ball valve; 900. Check valve; 1000. Oil and water removal filter. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0025] First embodiment: An energy-saving intelligent automatic air replenishment system for ash conveying pipelines includes an ash conveying pipeline 100.

[0026] The two ends of the ash conveying pipeline 100 are connected to the main air source and the ash silo, respectively. For example, there are three ash silos: a raw ash silo 201, a coarse ash silo 202, and a fine ash silo 203. The raw ash silo 201, coarse ash silo 202, and fine ash silo 203 are connected in parallel to the ends of the ash conveying pipeline 100. The top end of the raw ash silo 201 is connected to the ash conveying pipeline 100 through a switching valve 204. The top end of the coarse ash silo 202 is connected to the ash conveying pipeline 100 through a switching valve 204. The top end of the fine ash silo 203 is connected to the ash conveying pipeline 100 through an ash discharge box 205. The system enables the classified storage and precise guidance of ash materials of different particle sizes. The switching valve 204 can quickly cut off the raw ash and coarse ash channels to ensure tight isolation of the ash silo. The fine ash silo 203 is connected by the ash discharge box 205, which can effectively mitigate the impact of airflow and prevent fine ash dust. This modular design allows the system to flexibly switch the conveying target according to the power plant's operating needs. It can achieve simultaneous ash feeding into the three silos to improve efficiency, or convey ash to a designated ash silo individually, which significantly improves the flexibility and reliability of the system operation and creates favorable conditions for the classified utilization of ash materials.

[0027] Several silo pumps 300 are connected in parallel to the end of the ash conveying pipeline 100 near the main air source, and several intelligent conveyors 400 are connected to the ash conveying pipeline 100. For example, the intelligent conveyors 400 are short-circuited and inserted at an angle into the ash conveying pipeline 100 during installation, and the angle between the intelligent conveyors 400 and the ash conveying pipeline 100 is 35°-45°. The ash conveying pipeline 100 is also connected to a gas tracing pipeline 500, one end of which is connected to the ash silo, and the other end is connected to the end of the ash conveying pipeline 100 near the main air source. The several intelligent conveyors 400 are connected to each other through the gas tracing pipeline 500. The intelligent conveyor 400 includes a cylinder seat, an upper valve body, a lower valve body, and a check valve body. The cylinder seat is connected to the cylinder, and the drive end of the cylinder is connected to a plug. The plug is also connected to the cylinder through a plug return spring. The plug blocks the exhaust pipe on the upper valve body. The upper valve body also has a through hole communicating with the cylinder seat. The check valve body also has two sampling ports. One sampling port is connected to the high-pressure inlet on the lower side of the cylinder, and the other sampling port is connected to the low-pressure inlet on the upper side of the cylinder of the intelligent conveyor 400, which is arranged adjacent to the main air source.

[0028] The intelligent conveyor 400 is configured to predict the risk of blockage based on the pressure within the ash conveying pipeline 100 when a pressure difference occurs between two adjacent intelligent conveyors 400. Upon prediction of a risk, the pressure difference drives a cylinder to operate, controlling the pressure balance between the upper and lower valve bodies through the cooperation of a plug and an exhaust pipe. This controls the opening of the check valve core, enabling automatic air replenishment to the ash conveying pipeline 100. For example, the logic for predicting the risk of blockage by the intelligent conveyor 400 involves determining whether the pressure difference in the ash conveying pipeline 100 exceeds a first preset threshold, and / or determining whether the rate of increase of the pressure difference exceeds a second preset threshold.

[0029] Furthermore, the silo pump 300 is further configured to simultaneously limit the feeding speed into the ash conveying pipeline when a risk of pipe blockage is anticipated, and coordinate with the activation of the intelligent conveyor 400 to perform anti-blockage control. The silo pump 300's collaborative control mechanism directly reduces the ash concentration in the pipeline by limiting the feeding speed, while simultaneously working with the intelligent conveyor 400 to precisely replenish air and increase the material flow rate, forming a synergistic effect of reducing material and increasing air. This intervention addresses the source of conveying resistance, effectively eliminating the risk of pipe blockage and avoiding the waste of air volume caused by a single air replenishment method. This allows the system to maintain stable operation with minimal energy consumption, while significantly reducing the impact wear on the equipment caused by pipe blockage.

[0030] Furthermore, the intelligent conveyor 400 is configured to activate a blockage-clearing mode when anti-blocking measures fail and the pipeline becomes blocked, providing continuous or pulsed air replenishment until the pipeline pressure returns to normal. When anti-blocking fails and the pipeline is completely blocked, a significant pressure difference will occur before and after the blockage point. This pressure difference will drive the nearest intelligent conveyor 400 to continuously or forcefully activate, providing high-intensity air replenishment to impact the blockage point until the blockage is cleared and the pipeline pressure returns to normal, at which point the intelligent conveyor 400 will automatically shut off. The blockage-clearing control mechanism can automatically activate when anti-blocking measures fail and the pipeline is completely blocked. Through continuous or pulsed high-intensity air replenishment via the intelligent conveyor 400, a powerful air impact is formed, effectively disrupting the structural balance of the blockage material. This not only quickly clears the pipeline, avoiding the lag of manual intervention, but also automatically determines the timing of blockage clearance based on real-time pressure. Once the pressure returns to normal, air replenishment immediately stops and normal conveying resumes, ensuring clearance efficiency while minimizing air consumption, achieving autonomous diagnosis and rapid recovery from pipe blockage faults.

[0031] Furthermore, a pneumatic discharge valve 101 is also installed on the ash conveying pipeline 100, which is connected to the end of the silo pump 300 near the ash silo on the ash conveying pipeline 100. The pneumatic discharge valve 101 can quickly and reliably shut off when the system ends conveying, effectively preventing the ash-air mixture in the ash silo from flowing back along the ash conveying pipeline 100 to the silo pump 300 area, thus avoiding pipeline contamination and equipment ash accumulation. The pneumatic discharge valve 101 automatically closes at the end of the conveying cycle, ensuring system sealing and preventing ash from settling and caking during shutdown, creating favorable conditions for the next start-up, and significantly reducing the workload of maintenance personnel in cleaning backflowed ash.

[0032] Furthermore, a manual ball valve 600 is connected at the connection point between the intelligent conveyor 400 and the gas tracing pipeline 500. This manual ball valve 600 allows maintenance personnel to quickly isolate the intelligent conveyor 400 from the gas tracing pipeline 500 by closing the valve when maintenance or replacement is needed. This avoids production interruptions caused by a complete system shutdown and ensures the safety of maintenance operations. Simultaneously, during system commissioning, this valve can be used to precisely adjust the inlet pressure of a single intelligent conveyor 400, providing a flexible means of system optimization. Its structure ensures long-term operational reliability and effectively prevents system performance degradation due to the failure of a single component.

[0033] Furthermore, the main gas source also includes a gas source pipeline 700. The first end of the gas source pipeline 700 is connected to the main gas source. The first ends of the ash conveying pipeline 100 and the accompanying gas pipeline 500 are respectively equipped with a manual ball valve 600, a pneumatic ball valve 800 and a check valve 900. The first ends of the ash conveying pipeline 100 and the accompanying gas pipeline 500 are connected to the end of the gas source pipeline 700. The gas source pipeline 700 is respectively equipped with a manual ball valve 600, an oil and water removal filter 1000 and another manual ball valve 600. A secondary pipeline is also connected in parallel to the outside of the two manual ball valves 600, and a manual ball valve 600 is connected to the secondary pipeline. The manual ball valve 600 provides a reliable mechanical isolation point for equipment maintenance, the pneumatic ball valve 800 enables remote automatic control of system start-up and shutdown, the check valve 900 effectively prevents backflow of ash-gas mixtures and contamination of the gas source system, and the oil and water removal filter 1000 ensures the quality of the delivered gas source and avoids pipe scaling and equipment corrosion caused by moisture and oil. The parallel secondary pipelines also form an emergency gas path, and the system can continue to operate through the backup pipeline when the main filter is under maintenance. The multi-level pipeline design 701 not only improves the reliability of the system, but also achieves a flexible balance between maintenance and operation.

[0034] In operation, this embodiment is as follows: When the system starts, the main air source supplies air to the ash conveying pipeline 100, and the silo pump 300 sends the ash material into the pipeline to begin conveying. In the initial stage, due to the concentration of materials, a large pressure difference is formed, which drives the cylinders of each intelligent conveyor 400 to operate. Through mechanical linkage, the intelligent conveyors 400 are opened to continuously replenish air. When the ash material and gas are fully mixed and enter a stable conveying state, the pipeline pressure tends to balance, and the intelligent conveyors 400 automatically close under the action of the return spring. When the pressure value exceeds the first preset threshold or the pressure rise rate exceeds the second preset threshold, the risk of pipe blockage is immediately predicted and anti-blockage control is executed simultaneously. The silo pump 300 limits the feeding speed to reduce the material-to-air ratio, and the intelligent conveyors 400 at the corresponding position open to replenish air. If the anti-blockage fails and a complete blockage occurs, the extreme pressure difference at both ends of the blockage point will cause the intelligent conveyors 400 to start the unblocking mode, continuously and forcefully opening to perform high-intensity unblocking and air replenishment until the blockage is cleared and the pressure returns to normal. After the conveying is completed, the pneumatic discharge valve 101 automatically closes to prevent backflow of ash and gas. Actual operating data shows that the system's gas source energy consumption was significantly reduced after the upgrade, with the average gas consumption of Unit 1 decreasing from 12403.4 m³ / s before the upgrade. 3 It dropped to 5852.1m 3 Energy savings reached 52.8%, and the gas consumption of Unit 2 was only 86% of that of Unit 1. The system achieved full pump and full pipe low flow rate conveying, and there was no 100% blockage in the ash conveying pipeline. The service life of each piece of equipment was significantly extended, achieving the dual goals of energy saving and stable operation.

[0035] In this embodiment, timely activation of supplemental air before pipe blockage occurs significantly reduces ash conveying resistance, effectively preventing pipe blockage and maintaining the ash conveying process at a low air volume requirement, resulting in greater energy savings. Simultaneously, by avoiding pressure shocks and frequent unblocking operations caused by pipe blockage, the overall system's operational stability is ensured, equipment wear is significantly reduced, and service life is extended. This achieves energy saving, blockage prevention, and extended equipment lifespan while ensuring maximum system processing capacity.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An energy-saving intelligent automatic gas replenishment system for ash conveying pipelines, characterized in that, include: The ash conveying pipeline has two ends connected to the main air source and the ash silo, respectively. Several silo pumps are connected in parallel to the end of the ash conveying pipeline near the main air source. Several intelligent conveyors are connected to the ash conveying pipeline. The ash conveying pipeline is also connected to a gas tracing pipeline. One end of the gas tracing pipeline is connected to the ash silo, and the other end is connected to the end of the ash conveying pipeline near the main air source. Several intelligent conveyors are connected to each other through the gas tracing pipeline. Each intelligent conveyor includes a cylinder seat, an upper valve body, a lower valve body, and a check valve body. The cylinder seat is connected to a cylinder. The drive end of the cylinder is connected to a plug, and the plug is also connected to the cylinder through a plug return spring. The plug seals the exhaust pipe opened on the upper valve body. The upper valve body also has a through hole communicating with the cylinder seat. The check valve body also has two sampling ports. One sampling port is connected to the high-pressure inlet on the lower side of the cylinder, and the other sampling port is connected to the low-pressure inlet on the upper side of the cylinder of the intelligent conveyor arranged adjacent to the main air source. The intelligent conveyor is configured to predict the risk of blockage based on the pressure in the ash conveying pipeline when a pressure difference occurs between two adjacent intelligent conveyors. When the risk is predicted, the pressure difference drives the cylinder to act. Through the cooperation of the plug and the exhaust pipe, the pressure balance between the upper and lower valve bodies is controlled, and the check valve core is opened to achieve automatic air replenishment to the ash conveying pipeline.

2. The energy-saving intelligent automatic gas replenishment system for ash conveying pipelines according to claim 1, characterized in that: The silo pump is further configured to simultaneously limit the feeding speed to the ash conveying pipe when a risk of pipe blockage is anticipated, and to coordinate with the opening action of the intelligent conveyor for anti-blockage control.

3. The energy-saving intelligent automatic gas replenishment system for ash conveying pipelines according to claim 1, characterized in that: The logic of the intelligent conveyor to predict the risk of pipe blockage is to determine whether the pressure difference of the ash conveying pipeline exceeds a first preset threshold, and / or whether the rate of increase of the pressure difference of the ash conveying pipeline exceeds a second preset threshold.

4. The energy-saving intelligent automatic gas replenishment system for ash conveying pipelines according to claim 1, characterized in that: The intelligent conveyor is also configured to activate the unblocking mode when it is determined that the anti-blocking has failed and the pipeline is blocked, and to perform continuous or pulsed gas replenishment until the pipeline pressure returns to the normal range.

5. The energy-saving intelligent automatic gas replenishment system for ash conveying pipelines according to claim 1, characterized in that: The ash conveying pipeline is also equipped with a pneumatic discharge valve, which is connected to the end of the silo pump near the ash silo on the ash conveying pipeline.

6. The energy-saving intelligent automatic gas replenishment system for ash conveying pipelines according to claim 1, characterized in that: The ash silos consist of three silos: a raw ash silo, a coarse ash silo, and a fine ash silo. The raw ash silo, the coarse ash silo, and the fine ash silo are connected in parallel to the end of the ash conveying pipeline. The top of the raw ash silo is connected to the ash conveying pipeline via a switching valve. The top of the coarse ash silo is connected to the ash conveying pipeline via a switching valve. The top of the fine ash silo is connected to the ash conveying pipeline via an ash discharge box.

7. The energy-saving intelligent automatic gas replenishment system for ash conveying pipelines according to claim 1, characterized in that: The intelligent conveyor is short-circuited and inserted at an angle into the ash conveying pipeline during installation, and the angle between the intelligent conveyor and the ash conveying pipeline is 35°-45°.

8. The energy-saving intelligent automatic gas replenishment system for ash conveying pipelines according to claim 1, characterized in that: A manual ball valve is connected at the connection point between the intelligent delivery device and the gas tracing pipeline.

9. The energy-saving intelligent automatic gas replenishment system for ash conveying pipelines according to claim 1, characterized in that: The main gas source also includes a gas source pipeline. The first end of the gas source pipeline is connected to the main gas source. The first ends of the ash conveying pipeline and the accompanying gas pipeline are respectively equipped with a manual ball valve, a pneumatic ball valve and a check valve. The first ends of the ash conveying pipeline and the accompanying gas pipeline are connected to the end of the gas source pipeline. The gas source pipeline is respectively equipped with a manual ball valve, an oil and water removal filter and another manual ball valve. A secondary pipeline is also connected in parallel to the outside of the two manual ball valves. A manual ball valve is connected to the secondary pipeline.

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