Boiler bottom heating valve anti-erosion pressure reduction protection device

Abstract

The utility model discloses an anti-erosion pressure-reducing protection device for a heating valve at the bottom of a boiler, which belongs to the technical field of pressure-reducing protection and comprises a protection pipeline, a pressure-reducing valve and an anti-impact pipe, the pressure-reducing valve is arranged at an inlet of the protection pipeline, and the protection pipeline is arranged between a heating main pipe and a heating main valve of a boiler heating system. An anti-impact pipe is arranged at the joint of the heating main valve and the protection pipeline, and a plurality of flow guide plates are installed in the anti-impact pipe. The protection pipeline has the advantages that the protection pipeline is arranged between the heating main pipe and the heating main valve of the boiler heating system, high-pressure steam reaching the heating main valve through the pipeline can be subjected to pressure reduction through the pressure reducing valve arranged on the protection pipeline, the pressure difference between the front portion and the rear portion of the heating main valve is greatly reduced, and meanwhile the protection pipeline is convenient to use. An anti-impact pipeline is further arranged at the front end of the heating main valve, the impact strength of high-temperature steam can be reduced under the action of a flow guide plate in the pipeline, and the anti-erosion pressure reduction capacity of the device to the main valve is further improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure reduction protection technology, specifically to a pressure reduction protection device for boiler bottom heating valve to prevent erosion. Background Technology

[0002] Boiler heating systems have numerous valves, and the valve cores and seats commonly suffer from severe erosion and wear. Frequent valve replacements not only increase labor costs for inspection and maintenance, but more importantly, severe internal leakage in the valves often significantly reduces steam temperature and increases the risk of water erosion in turbine blades, posing a significant threat to the safe and economical operation of the unit. Due to the high pressure before the main valve, when high-pressure media pass through the valve, the high pressure differential will cause strong erosion and wear on the valve core and seat, leading to obvious internal leakage in a short period of time. Therefore, it is necessary to implement anti-erosion and pressure-reducing protection for the main heating valve at the bottom of the boiler.

[0003] Existing boiler bottom heating valve erosion and pressure reduction protection devices are mostly simple in structure, lacking a safe and stable pressure reduction protection structure, and unable to monitor and warn of the pressure conditions before the valve. Their practicality and durability need improvement. Furthermore, a utility model patent with publication number CN211232423U discloses an erosion and pressure reduction protection device for valves in a power plant boiler desuperheating water system. This device features a pressure reducing protector, a remote pressure transmitter, and a desuperheating water electric main valve sequentially installed on the desuperheating water header. The desuperheating water header is divided into a primary desuperheating unit and a secondary desuperheating unit via two desuperheating water branch pipes. Each primary and secondary desuperheating unit includes two desuperheating unit branch pipes. Each branch pipe is equipped with a first desuperheating water control valve, a desuperheating water pneumatic regulating valve, a second desuperheating water control valve, and a desuperheater. However, this device lacks a safe and stable pressure reduction protection structure and cannot monitor and warn of the pressure conditions before the valve. Its practicality and durability also need improvement. Utility Model Content

[0004] To overcome the problems of existing technologies lacking a safe and stable pressure-reducing protection structure, being unable to monitor and warn of pressure conditions before the valve, and having limited practicality and durability, this utility model provides a boiler bottom heating valve anti-erosion pressure-reducing protection device, including a protection pipe, a pressure-reducing valve, and an anti-impact pipe. The pressure-reducing valve is located at the inlet of the protection pipe, and the protection pipe is located between the heating main pipe and the main heating valve of the boiler heating system. An anti-impact pipe is installed at the connection between the main heating valve and the protection pipe, and several guide plates are installed inside the anti-impact pipe.

[0005] The protective pipeline is installed between the heating header and the main heating valve of the boiler heating system. The pressure reducing valve installed on the protective pipeline can reduce the pressure of the high-pressure steam that reaches the main heating valve through the pipeline, which can significantly reduce the pressure difference before and after the main heating valve. At the same time, an anti-impact pipeline is also installed in front of the main heating valve. Under the action of the guide plate inside the pipeline, the impact force of the high-temperature steam can be reduced, which further improves the device's anti-erosion and pressure reducing capability of the main valve.

[0006] Preferably, a spare pressure reducing valve is provided in the middle of the protective pipeline.

[0007] Preferably, a pressure warning component is installed on the protective pipeline at the outlet of the pressure reducing valve. The pressure warning component includes a monitoring box, an alarm, and a barometer. The barometer is installed inside the monitoring box, and a protective pipeline is inserted inside the barometer. The detection end of the barometer is located on the inner wall of the protective pipeline, and the alarm is installed on the top of the monitoring box.

[0008] By installing a pressure warning component on the protective pipeline, the pressure of high-pressure steam passing through the protective pipeline and being reduced in pressure by a pressure reducing valve can be monitored by a pressure detector. When the pressure is abnormal, an alarm can be triggered to facilitate timely handling by staff.

[0009] Preferably, the monitoring box has a display on the front, and both the display and the alarm are electrically connected to the barometer.

[0010] Preferably, a safety valve is installed on the protective pipeline.

[0011] Preferably, the protective pipe is provided with a reinforcing sleeve, and the outer surface of the reinforcing sleeve is provided with an insulation sleeve.

[0012] Preferably, the protective pipe is provided with a wear-resistant inner tube, and the inner wall of the wear-resistant inner tube is provided with a corrosion-resistant coating.

[0013] By installing a reinforcing sleeve on the outside of the pipeline, the pipeline strength can be improved, giving it good pressure resistance. By installing a wear-resistant inner tube on the inner wall of the pipeline, the wear resistance and erosion resistance of the pipeline can be further improved.

[0014] Preferably, the protective pipe is made of galvanized steel pipe.

[0015] Preferably, a plurality of the guide plates are evenly distributed along the circumferential direction of the inner wall of the protective pipe, and the guide plates are made of high pressure resistant and impact resistant metal material.

[0016] Preferably, the protective pipe is provided with a sealing connection pipe at the connection between it and the heating header and the main heating valve of the boiler heating system.

[0017] By installing a sealed connection pipe, the sealing performance at the connection between protective pipes can be improved. The sealed connection pipe is made of high-temperature and high-pressure resistant material.

[0018] Beneficial effects:

[0019] The beneficial effects of adopting the technical solution of this utility model are as follows:

[0020] (1) The protective pipeline is installed between the heating main pipe and the heating main valve of the boiler heating system. The pressure reducing valve installed on the protective pipeline can reduce the pressure of the high-pressure steam that reaches the heating main valve through the pipeline, greatly reducing the pressure difference before and after the heating main valve. At the same time, an anti-impact pipeline is also installed at the front end of the heating main valve. Under the action of the guide plate inside the pipeline, the impact force of the high-temperature steam can be reduced, further improving the device's anti-erosion and pressure reducing capability of the main valve.

[0021] (2) By installing a pressure warning component on the protective pipeline, the pressure of high-pressure steam passing through the protective pipeline and reduced by the pressure reducing valve can be monitored under the action of the pressure detector. When the pressure is abnormal, an alarm can be issued by the alarm device, which is convenient for staff to handle in time.

[0022] (3) By installing a reinforcing sleeve on the outside of the pipeline, the strength of the pipeline can be improved, giving it good pressure resistance. By installing a wear-resistant inner tube on the inner wall of the pipeline, the wear resistance of the pipeline can be further improved, and the erosion resistance can be enhanced. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the anti-erosion and pressure-reducing protection device for the boiler bottom heating valve of this utility model;

[0025] Figure 2 This is a schematic diagram of the internal connection structure of the anti-erosion and pressure-reducing protection device for the bottom heating valve of the boiler according to this utility model;

[0026] Figure 3 This is a schematic diagram of the anti-impact tube on the anti-erosion and pressure-reducing protection device for the bottom heating valve of the boiler according to this utility model;

[0027] Figure 4This is a schematic diagram of the structure of the protective pipe on the boiler bottom heating valve anti-erosion pressure relief protection device of this utility model.

[0028] In the diagram: 1. Protective pipe; 2. Pressure reducing valve; 3. Main heating valve; 4. Monitoring box; 5. Display; 6. Alarm; 7. Backup pressure reducing valve; 8. Safety valve; 9. Air pressure detector; 10. Impact-resistant pipe; 11. Baffle plate; 12. Reinforcing sleeve; 13. Insulation sleeve; 14. Wear-resistant inner tube; 15. Corrosion-resistant coating. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0030] This embodiment places a protective pipeline between the boiler heating system's main heating pipe and the main heating valve. A pressure-reducing valve on the protective pipeline reduces the pressure of the high-pressure steam reaching the main heating valve, significantly decreasing the pressure difference before and after the valve. Simultaneously, an anti-impact pipeline is installed upstream of the main heating valve, which, with the help of internal baffles, reduces the impact force of the high-temperature steam, further enhancing the device's erosion-resistant and pressure-reducing capabilities against erosion. The specific implementation method is as follows:

[0031] like Figures 1 to 4 As shown, a boiler bottom heating valve anti-erosion and pressure reduction protection device includes a protection pipe 1, a pressure reducing valve 2, and an anti-impact pipe 10. The pressure reducing valve 2 is located at the inlet of the protection pipe 1. The protection pipe 1 is located between the heating main pipe and the main heating valve 3 of the boiler heating system. The anti-impact pipe 10 is installed at the connection between the main heating valve 3 and the protection pipe 1, and several guide plates 11 are installed inside the anti-impact pipe 10. By placing the protection pipe between the heating main pipe and the main heating valve of the boiler heating system, the pressure reducing valve 2 on the protection pipe 1 can reduce the pressure of the high-pressure steam reaching the main heating valve 3 through the pipe, significantly reducing the pressure difference before and after the main heating valve 3. At the same time, the anti-impact pipe 10 is also provided at the front end of the main heating valve 3, which, under the action of the guide plates 11 inside the pipe, reduces the impact force of the high-temperature steam, further improving the device's anti-erosion and pressure reduction capability of the main valve.

[0032] A pressure reducing valve is a valve that reduces the inlet pressure to a desired outlet pressure by adjustment, and automatically maintains a stable outlet pressure by relying on the energy of the medium itself.

[0033] A backup pressure reducing valve 7 is installed in the middle of the protection pipeline 1. The backup pressure reducing valve 7 can be activated when the pressure reducing valve 2 is unavailable, or it can be used as a second-stage pressure reducing structure in conjunction with the pressure reducing valve 2 to perform double pressure reduction, which can significantly improve the pressure reducing effect.

[0034] A pressure warning component is installed on the protective pipeline 1 at the outlet of the pressure reducing valve 2. This component includes a monitoring box 4, an alarm 6, and a pressure detector 9. The pressure detector 9 is housed inside the monitoring box 4, and the protective pipeline 1 is inserted into the pressure detector 9. The detection end of the pressure detector 9 is located on the inner wall of the protective pipeline 1. The alarm 6 is installed on the top of the monitoring box 4. Through the pressure warning component on the protective pipeline 1, the pressure of the high-pressure steam passing through the protective pipeline 1 and pressure-reducing valve 2 can be monitored under the action of the pressure detector 9. In case of abnormal pressure, the alarm 6 will sound an alarm, allowing personnel to handle the situation promptly.

[0035] The front of the monitoring box 4 is equipped with a display 5, and both the display 5 and the alarm 6 are electrically connected to the barometer 9. The display 5 shows the monitoring structure of the barometer 9, which is convenient for staff to view and manage.

[0036] A safety valve 8 is installed on the protective pipeline 1. The safety valve 8 can open to divert and relieve pressure when the pipeline pressure exceeds the specified value. The safety valve 8 is equipped with an external discharge pipeline interface, which serves as a safety protection function.

[0037] A reinforcing sleeve 12 is installed on the outside of the protective pipe 1, and an insulation sleeve 13 is installed on the outer surface of the reinforcing sleeve 12. By installing the reinforcing sleeve 12 on the outside of the pipe, the strength of the pipe can be improved, giving it good pressure resistance. The insulation sleeve 13 can maintain the steam temperature inside the protective pipe 1, preventing heat loss and affecting the operation of the heating system.

[0038] The protective pipe 1 is equipped with a wear-resistant inner tube 14, and the inner wall of the wear-resistant inner tube 14 is coated with a corrosion-resistant coating 15. The wear-resistant inner tube 14 installed on the inner wall of the pipe can further improve the wear resistance of the pipe. At the same time, with the cooperation of the corrosion-resistant coating 15, the erosion resistance can be enhanced.

[0039] The material of the protective pipe 1 is galvanized steel pipe.

[0040] Several guide vanes 11 are evenly distributed along the circumference of the inner wall of the protective pipe 1. The guide vanes 11 are made of high-pressure resistant and impact-resistant metal material. The extension height of the guide vanes 11 on the inner wall of the pipe increases sequentially from the side facing the inlet of the protective pipe 1 to the side near the guide vanes 11, which can absorb steam through the impact at the tip.

[0041] Sealed connecting pipes are installed at the connection points between the protective pipe 1 and the heating header pipe and the main heating valve 3 of the boiler heating system. The sealing connecting pipes improve the sealing performance at the connection points between the protective pipes 1 and 2. The sealing connecting pipes are made of high-temperature and high-pressure resistant materials.

[0042] Working Principle: The protective pipeline is installed between the heating header and the main heating valve of the boiler heating system. A pressure-reducing valve on the protective pipeline reduces the pressure of the high-pressure steam reaching the main heating valve, significantly reducing the pressure difference before and after the valve. Simultaneously, an anti-impact pipeline is installed upstream of the main heating valve, which, with the help of internal baffles, reduces the impact force of the high-temperature steam, further enhancing the device's anti-erosion and pressure-reducing capabilities for the main valve. A pressure warning component on the protective pipeline, monitored by a pressure detector, tracks the pressure of the high-pressure steam passing through the protective pipeline and after being reduced by the pressure-reducing valve. In case of abnormal pressure, an alarm is triggered for timely intervention. A reinforcing sleeve on the outside of the pipeline increases its strength, providing excellent pressure resistance. A wear-resistant inner tube on the inner wall further enhances the pipeline's wear resistance and erosion resistance.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A boiler bottom heating valve anti-erosion pressure relief protection device, characterized in that, Including the protection pipeline (1), pressure reducing valve (2) and anti-impact pipe (10), the pressure reducing valve (2) is arranged at the inlet of protection pipeline (1), the protection pipeline (1) is arranged between the heating main pipe of boiler heating system and heating total valve (3), the connection place of heating total valve (3) and protection pipeline (1) is provided with anti-impact pipe (10), the inside of anti-impact pipe (10) is installed with several guide vanes (11).

2. A boiler bottom heating valve anti-erosion pressure reducing protection device according to claim 1, characterized in that, The middle part of the protection pipeline (1) is provided with a backup pressure reducing valve (7).

3. The anti-erosion and pressure-reducing protection device for the heating valve of the boiler bottom according to claim 1, characterized in that, The protection pipeline (1) is provided with a pressure warning assembly at the outlet of the pressure reducing valve (2), the pressure warning assembly comprises a monitoring box (4), an alarm (6) and a gas pressure detector (9), the inside of the monitoring box (4) is provided with the gas pressure detector (9), the gas pressure detector (9) is provided with the protection pipeline (1) in the inside, and the detection end of the gas pressure detector (9) is arranged on the inner wall of the protection pipeline (1), and the alarm (6) is installed on the top of the monitoring box (4).

4. The anti-erosion and pressure-reducing protection device for the heating valve of the boiler bottom according to claim 3, characterized in that, The front of the monitoring box (4) is provided with a display (5), and the display (5) and the alarm (6) are electrically connected with the gas pressure detector (9).

5. The anti-erosion and pressure-reducing protection device for the heating valve of the boiler bottom according to claim 1, characterized in that, The protection pipeline (1) is provided with a safety valve (8).

6. A boiler bottom heating valve anti-erosion pressure reducing protection device according to claim 1, characterized in that, The outside of the protection pipeline (1) is provided with a reinforcing sleeve (12), and the outer surface of the reinforcing sleeve (12) is provided with a heat preservation sleeve (13).

7. The anti-erosion and pressure-reducing protection device for the heating valve of the boiler bottom as claimed in claim 1, characterized in that, The inside of the protection pipeline (1) is provided with a wear-resistant inner tube (14), and the inner wall of the wear-resistant inner tube (14) is provided with a corrosion-resistant coating (15).

8. The anti-erosion and pressure-reducing protection device for a boiler bottom heating valve according to claim 1, characterized in that, The material of the protection pipeline (1) is galvanized steel pipe.

9. The anti-erosion and pressure-reducing protection device for a boiler bottom heating valve according to claim 1, characterized in that, Several guide vanes (11) are uniformly distributed along the circumferential direction of the inner wall of the protection pipeline (1), and the material of the guide vane (11) is high-pressure-resistant and impact-resistant metal material.

10. The anti-erosion and pressure-reducing protection device for a boiler bottom heating valve according to claim 1, characterized in that, The connection places of the protection pipeline (1) and the heating main pipe and the heating total valve (3) of the boiler heating system are respectively provided with sealing connection pipes.

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