Leakage detection plugging device of air cooling system

Abstract

The utility model discloses an air cooling system leakage detection plugging device which comprises a steam exhaust pipe, a radiator, a condensation water valve and the like, the leakage detection plugging device further comprises a plugging assembly, the plugging assembly comprises an inflation air bag, a base, a hook, a tightening rope and a supporting net, and the inflation air bag is positioned through the base, the hook and the supporting net. After the inflatable air bag is inflated, the inflatable air bag and the plugging sealing curtain jointly seal a steam side channel of the air cooling system, the positive pressure or negative pressure state of the air cooling system is maintained, destructive power generated by the pressure difference of air in front of and behind the inflatable air bag is transmitted to the wall of the exhaust pipe through the supporting net, the tightening rope, the hook and the base, and it is guaranteed that the inflatable air bag cannot be damaged. The air cooling system leakage detection plugging device is simple in structure, low in investment, short in construction time, convenient and fast to arrange and capable of adapting to plugging leakage detection of units with different capacities and containers with irregular structures.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline and container leakage detection, and in particular to the technical field of air cooling system leakage detection in thermal power plants. Background Art

[0002] Coal-fired thermal power generation is still the main form of power generation in my country. Its working principle is to convert the chemical energy of coal into electrical energy and transmit the electrical energy to thousands of households through the transmission network. Water absorbs the heat released by coal combustion in the boiler and turns into high-temperature and high-pressure steam. The high-temperature and high-pressure steam drives the steam turbine to rotate and do work. The mechanical energy transmitted by the steam turbine is finally converted into electrical energy in the generator, and the exhaust steam after work is discharged into the air cooling system. It condenses into water in the air cooling system and re-enters the boiler for recycling. The volume of the air cooling system is very large, and some systems are more than 10,000 cubic meters. In order to improve energy utilization efficiency, the air cooling system always maintains a negative pressure state. Due to the large system, the air cooling system often leaks for various reasons. At this time, air will enter the air cooling system, and the leaked air will seriously affect the working efficiency of the cooling system. The oxygen in the air will accelerate the corrosion of the equipment, and in severe cases, it will cause the production process to be interrupted.

[0003] In the prior art, when there is a leak, it is necessary to isolate the air cooling system, extract or inject leak detection gas, maintain negative or positive pressure in the air cooling system, and facilitate finding the leak. The diameter of the condensate side pipe of the air cooling system is relatively small, and the system can be isolated on the water side by closing the condensate valve. However, the diameter of the steam side exhaust pipe for conveying exhausted steam is relatively large, and the exhaust pipe has a diameter of 6 meters, which makes it difficult to seal. When checking for leaks, welding of metal plugging plates requires a large amount of work and takes a long time, and it will also damage the exhaust pipe structure. The amount of funds required to install additional valves is huge, and the investment and sunk costs are large, with low cost-performance ratio. The above two solutions cannot complete the sealing work of the steam side of the air cooling system with high quality in a short period of time. Utility Model Content

[0004] To this end, the utility model provides a leak detection and plugging device for an air cooling system to solve the problem in the prior art that the exhaust pipe is difficult to plug and cannot be plugged for leak detection.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] An air cooling system leak detection and plugging device includes a hot well, exhaust steam, an exhaust steam pipe, an exhaust steam distribution header, a radiator, a condensate pipe, a condensate valve, and condensate. The hot well, the exhaust steam pipe, the exhaust steam distribution header, the radiator, the condensate valve, and the condensate pipe constitute a closed air cooling system. The hot well is used to collect and store condensate. The exhaust steam pipe is connected between the hot well and the exhaust steam distribution header to guide the exhaust steam after work to the exhaust steam distribution header. The exhaust steam distribution header is connected between the exhaust steam pipe and the radiator to evenly distribute the exhaust steam to the radiator. The radiator is connected between the exhaust steam distribution header and the condensate pipe. Used to cool the exhaust steam, the condensate pipe is connected between the radiator and the hot well, and is used to transport the condensate to the hot well. The leak detection and plugging device also includes a plugging component, which includes a base, a hook, a tightening rope, a tightener, a support net, an inflatable airbag, a plugging sealing curtain, a leak detection pressure gauge, a leak detection pumping and inflating pipe, a leak detection pumping and inflating valve, an airbag inflating hose, an airbag inflating joint, an airbag inflating valve, an airbag pressure gauge and a hanging belt. The base is connected to the inner wall of the exhaust pipe, and the hook is a hook with a straight handle. The hook is connected to the threaded blind hole of the base through a thread, the tightening rope is connected between the hook and the supporting net, the supporting net is a circular woven steel net, the outer edge of which is connected to the tightening rope, the tightener is connected to both ends of the tightening rope, the leak detection and inflating pipe is connected to the exhaust pipe, the leak detection and inflating valve is connected to the leak detection and inflating pipe, and is used to extract or fill the leak detection gas into the air cooling system, and the leak detection pressure gauge is connected to the exhaust pipe, and is used to monitor the leak detection gas in the air cooling system. Check for gas leakage pressure. The inflatable airbag is in a ring shape, the sealing curtain is in a circular shape, the airbag inflation connector is connected to the exhaust pipe, the airbag inflation hose is connected between the inflatable airbag and the airbag inflation connector, the airbag inflation valve is connected to the other end of the airbag inflation connector for inflating the inflatable airbag, the airbag inflation pressure gauge is connected to the middle of the airbag inflation connector for monitoring the inflatable airbag pressure, and the hanging strap is connected to the sealing curtain for fixing the inflatable airbag.

[0007] Preferably, a plurality of the bases are arranged on the inner wall of the exhaust pipe, and a threaded blind hole is provided in the middle of the base.

[0008] Preferably, the hook is processed with threads on the outer diameter of the straight handle.

[0009] Preferably, the diameter of the support mesh is smaller than the inner diameter of the exhaust pipe, and the mesh size of the support mesh is smaller than 300 mm.

[0010] Preferably, the tightening ropes are alternately connected to the hooks and the supporting net.

[0011] Preferably, the maximum outer diameter of the inflatable airbag is larger than the inner diameter of the exhaust pipe, and the surface of the inflatable airbag is coated with silicone.

[0012] Preferably, the outer edge of the blocking sealing curtain is sealingly connected to the inflatable airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more intuitively illustrate the prior art and the present application, several exemplary drawings are given below. It should be clear that the specific structures and shapes shown in the drawings should not generally be regarded as limiting conditions for implementing the present utility model; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, positional relationship, specific shape, dimensional ratio relationship, connection method, etc. of certain units (components) based on the technical concept and exemplary drawings disclosed in the present application.

[0014] Figure 1 A schematic diagram of the overall structure of a leak detection and plugging device for an air cooling system provided by one embodiment of the present application;

[0015] Figure 2 This is a schematic diagram of the arrangement of a leak detection and plugging device for an air cooling system in an exhaust pipe;

[0016] Figure 3 for Figure 2 A cross-sectional view of the middle AA;

[0017] Figure 4 The present invention is a schematic diagram of the installation position of an exhaust pipe, a base, a hook, a tightening rope, a tightener and a supporting net of an air cooling system leak detection and plugging device.

[0018] Description of reference numerals:

[0019] 11. Hot well; 12. Exhaust pipe; 13. Exhaust steam distribution manifold; 14. Radiator; 15. Condensate pipe; 16. Condensate; 17. Exhaust steam; 18. Condensate valve; 200. Sealing assembly; 211. Base; 212. Hook; 213. Tightening rope; 214. Tightener; 215. Support net; 216. Inflatable airbag; 217. Sealing curtain; 218. Leak detection pressure gauge; 219. Leak detection suction and inflation pipe; 220. Leak detection suction and inflation valve; 221. Airbag inflation hose; 222. Airbag inflation connector; 223. Airbag inflation valve; 224. Airbag pressure gauge; 225. Hanging strap; 30. Air cooling system. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] In the description of the present application: the terms "on" and "inside" refer to the inside and outside of the corresponding component contours; the terms "including", "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units that have been explicitly listed, but may also include other steps or units that are not explicitly listed but are inherent to these processes, methods, products or equipment, or steps added based on further optimization schemes conceived in the present application.

[0022] refer to Figure 1-4 The present application discloses a leak detection and plugging device for an air cooling system, comprising a hot well 11, an exhaust pipe 12, an exhaust steam distribution header 13, a radiator 14, a condensate pipe 15, condensate 16, and exhaust steam 17. 、 The condensate valve 18 and the exhaust pipe 12 are used to transport the exhaust steam 17 to the exhaust steam distribution header 13. The exhaust steam distribution header 13 is used to evenly distribute the steam to the radiator 14. The exhaust steam 17 after work completes heat exchange in the radiator 14 and re-condenses into condensate 16. Then, it returns to the hot well 11 through the condensate pipe 15 and enters the boiler for recycling again. The leak detection and plugging device also includes a plugging component 200. The plugging component 200 includes a base 211 arranged circumferentially on the inner wall of the exhaust pipe 12, and a hook 212 is connected to the exhaust pipe 12. The base 211 is connected to the base 211 by a thread, the tightening rope 213 is alternately connected between the hook 212 and the support net 215, and the tightener 214 is connected to both ends of the tightening rope 213. The tightener 214 can unfold and tighten the support net 215 through the tightening rope 213, and the inflatable airbag 216 and the sealing curtain 217 sealed with it can be fixed to one side of the support net 215 through the hanging belt 225, and the inflatable airbag 216 can be inflated through the airbag inflation valve 223, the airbag inflation connector 222 and the airbag inflation hose 221. The gas of appropriate pressure is filled in, and after the inflation, the inflatable airbag 216 and the plugging sealing curtain 217 are unfolded on one side of the support net 215, and the silicone coated on the surface of the inflatable airbag 216 is closely attached to the inner wall of the exhaust pipe 12, and the leak detection gas is extracted or filled into the air cooling system 30 through the leak detection pumping and charging valve 220 and the leak detection pumping and charging pipe 219. The inflatable airbag 216 and the plugging sealing curtain 217 are closely attached to the support net 215 under the action of the front and rear pressure difference. The function of the support net 215 is to support the inflatable airbag 216 and the plugging sealing curtain 217. 7, and withstand the pressure generated by the different front and rear differential pressures to prevent the inflatable airbag 216 and the plugging sealing curtain 217 from being damaged due to the large front and rear pressure difference. The pressure in the air cooling system 30 and the inflatable airbag 216 can be adjusted by the leak detection pressure gauge 218 and the airbag pressure gauge 334. The leak detection gas is sealed in the air cooling system 30 through the plugging component 200. By extracting or filling the leak detection gas into the air cooling system 30, the positive or negative pressure environment in the air cooling system 30 can be maintained, which is convenient for finding the leakage point.

[0023] The technology involved in this application can also be applied to irregular container sealing and leak detection operations.

[0024] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0025] The above is a relatively specific and detailed description of the present application through general description and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not deviate from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. A leak detection and plugging device for an air cooling system, comprising a hot well, exhaust steam, an exhaust pipe, an exhaust steam distribution header, a radiator, a condensate pipe, a condensate valve, and condensate, wherein the hot well, the exhaust pipe, the exhaust steam distribution header, the radiator, the condensate valve, and the condensate pipe constitute a closed air cooling system, wherein the hot well is used to collect and store condensate, the exhaust pipe is connected between the hot well and the exhaust steam distribution header, and is used to guide the exhaust steam after work to the exhaust steam distribution header, the exhaust steam distribution header is connected between the exhaust pipe and the radiator, and is used to evenly distribute the exhaust steam to the radiator, the radiator is connected between the exhaust steam distribution header and the condensate pipe, and is used to cool the exhaust steam, the condensate pipe is connected between the radiator and the hot well, and is used to transport the condensate to the hot well, characterized in that: The leak detection and plugging device also includes a plugging component, which includes a base, a hook, a tightening rope, a tightener, a support net, an inflatable airbag, a plugging sealing curtain, a leak detection pressure gauge, a leak detection and suction inflation tube, a leak detection and suction inflation valve, an airbag inflation hose, an airbag inflation joint, an airbag inflation valve, an airbag pressure gauge and a hanging strap. The base is connected to the inner wall of the exhaust pipe, the hook is in the shape of a hook with a straight handle, the hook is connected to the threaded blind hole of the base through a thread, the tightening rope is connected between the hook and the support net, the support net is a circular woven steel net, the outer edge of which is connected to the tightening rope, the tightener is connected to both ends of the tightening rope, the leak detection and suction inflation tube is connected to the exhaust pipe, the leak detection and suction inflation valve is connected to the exhaust pipe, and the airbag inflation hose is connected to the exhaust pipe. The leak extraction and inflation valve is connected to the leak detection extraction and inflation pipe, and is used to extract or inject leak detection gas into the air cooling system. The leak detection pressure gauge is connected to the exhaust pipe, and is used to monitor the leak detection gas pressure in the air cooling system. The inflatable airbag is in a circular ring shape, and the blocking sealing curtain is in a circular shape. The airbag inflation connector is connected to the exhaust pipe, and the airbag inflation hose is connected between the inflatable airbag and the airbag inflation connector. The airbag inflation valve is connected to the other end of the airbag inflation connector, and is used to inflate the inflatable airbag. The airbag inflation pressure gauge is connected to the middle part of the airbag inflation connector, and is used to monitor the inflatable airbag pressure. The hanging strap is connected to the blocking sealing curtain, and is used to fix the inflatable airbag.

2. The air cooling system leak detection and plugging device according to claim 1, characterized in that: A plurality of bases are arranged on the inner wall of the exhaust pipe, and a blind hole with a thread is provided in the middle of the base.

3. The air cooling system leak detection and plugging device according to claim 1, characterized in that: The hook is processed with threads on the outer diameter of the straight handle.

4. The air cooling system leak detection and plugging device according to claim 1, characterized in that: The diameter of the support net is smaller than the inner diameter of the exhaust pipe, and the mesh size of the support net is smaller than 300 mm.

5. The air cooling system leak detection and plugging device according to claim 1, characterized in that: The tightening ropes are alternately connected to the hooks and the supporting net.

6. The air cooling system leak detection and plugging device according to claim 1, characterized in that: The maximum outer diameter of the inflatable airbag is greater than the inner diameter of the exhaust pipe, and the surface of the inflatable airbag is coated with silica gel.

7. The air cooling system leak detection and plugging device according to claim 1, characterized in that: The outer edge of the blocking sealing curtain is sealingly connected to the inflatable airbag.

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