Leakage detection device for low-temperature economizer of thermal power plant
By designing a low-temperature economizer leakage detection device with rod body, sampler, camera and cooling device, the problem of inconvenience in leakage detection of low-temperature economizer is solved, and accurate and flexible leakage judgment and operation convenience are achieved.
Patent Information
- Application Number
- CN202422219411.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The leakage detection of medium and low temperature economizers in the prior art is inconvenient, especially small leakage points are difficult to detect and there is a false alarm, resulting in poor leakage detection effect.
A low-temperature economizer leakage detection device in thermal power plants is designed, including a rod body, a sampler, a camera and a cooling device. The leakage is judged through the sampler sampling, the camera observes the dust accumulation, and the camera is protected by the cooling device. The rod body can be retracted to adapt to complex environments.
Accurate detection of low-temperature economizer leakage is achieved, detection flexibility and applicability is improved, camera damage is reduced, and operation convenience and safety is enhanced.
Smart Images
Figure CN223154570U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of low-temperature economizers, and particularly to a leakage detection device for low-temperature economizers in thermal power plants. Background Art
[0002] A low-temperature economizer is a device used to improve the thermal efficiency of a boiler and is usually installed in the tail flue of the boiler. Its main function is to utilize the waste heat of the flue gas discharged from the boiler to preheat the feed water or air of the boiler, thereby reducing fuel consumption. This device can effectively recover the heat in the flue gas, improve the overall thermal efficiency of the boiler, reduce the flue gas discharge temperature, and thus reduce energy waste and environmental pollution.
[0003] During the use of the low-temperature economizer, due to the low flow rate of the flue gas in its flue, the ability of the flue gas to carry fly ash is weakened, resulting in serious ash accumulation in this horizontal section. At the same time, if the low-temperature economizer leaks, the accumulated ash will coagulate into lumps when it meets water, which will exacerbate the blockage of the low-temperature economizer flue, not only reducing the boiler thermal efficiency but also affecting the operation of the boiler induced draft fan. Therefore, it is necessary to regularly detect the leakage of the low-temperature economizer.
[0004] In related technologies, an acoustic detector is usually used to detect the leakage of the low-temperature economizer. Under pressurized conditions, high-frequency sounds emitted by the leakage point are captured through the acoustic detection equipment.
[0005] In view of the above-mentioned related technologies, since the acoustic detector cannot directly detect small leakage points and even has false alarm situations, it is relatively inconvenient to detect the leakage of the low-temperature economizer. Utility Model Content
[0006] In order to improve the problem of relatively inconvenient leakage judgment of the low-temperature economizer, this application provides a leakage detection device for low-temperature economizers in thermal power plants.
[0007] The leakage detection device for low-temperature economizers in thermal power plants provided by this application adopts the following technical solutions:
[0008] A leakage detection device for low-temperature economizers in thermal power plants includes a rod body and a sampler for shoveling coal ash, and the sampler is located at the end of the rod body.
[0009] Furthermore, it also includes a camera and a cooling device arranged on the rod body. The camera is located at one end of the rod body close to the sampler, and the cooling device is used to cool the camera.
[0010] Furthermore, it is characterized in that the cooling device includes an air vent hose, a compressed air source, and an air vent valve. The air vent hose is connected to the compressed air source, and the air vent valve is arranged on the air vent hose and is used to control the air vent hose to blow air at the camera.
[0011] Furthermore, the rod body is hollow, one end of the air hose away from the compressed air source is located inside the rod body, and a plurality of ventilation holes are provided on the rod body around the camera.
[0012] Furthermore, a sticker for indicating the orientation of the sampler is provided at one end of the rod body away from the sampler.
[0013] Furthermore, a heat insulation layer is sleeved at one end of the rod body away from the sampler.
[0014] Furthermore, the rod body is a telescopic rod.
[0015] Furthermore, the rod body includes a plurality of sliding rods and a locking component provided between adjacent sliding rods. The plurality of sliding rods are coaxially sleeved in sequence from the end close to the sampler to the end away from the sampler, and adjacent sliding rods are slidably connected to each other. The locking component is used to lock or release the sliding rods.
[0016] Furthermore, the locking component includes a bolt and a return spring. The bolt is slidably connected to one of the adjacent two sliding rods, and a plurality of slots are spaced along the length direction of the other of the adjacent two sliding rods. The return spring is used to drive the bolt to be inserted into the slot.
[0017] Furthermore, a limiting strip is arranged on one of the adjacent two sliding rods along its sliding direction, and a limiting groove adapted to the limiting strip is provided on the other of the adjacent two sliding rods. The limiting strip slides in the limiting groove.
[0018] In summary, the present application includes at least one of the following beneficial technical effects:
[0019] 1. By providing the rod body and the sampler, when the staff conducts leakage detection on the low-temperature economizer, they hold the rod body and insert the sampler into the low-temperature economizer to take coal ash samples. Through the state of the coal ash, it can be accurately judged whether there is leakage near the sampling position. The staff can flexibly select the sampling point by moving the rod body, with high flexibility, thus facilitating the leakage detection of the low-temperature economizer;
[0020] 2. By providing the camera and the cooling device, the internal ash accumulation situation in the flue of the low-temperature economizer can be observed through the camera, thus facilitating the sampler to sample the ash accumulation area. The cooling device can provide cold air to the camera, reducing the possibility of damage to the camera due to high temperature;
[0021] 3. By setting the rod body as a plurality of sliding rods and locking the adjacent sliding rods through the locking component, the length of the rod body can be flexibly adjusted, so that the detection device can adapt to relatively narrow and complex environments, improving the applicability of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.
[0024] Figure 2 is Figure 1 An enlarged schematic diagram of part A in
[0025] Figure 3 is Figure 1 An enlarged schematic diagram of part B in
[0026] Reference numerals: 1, rod body; 11, first sliding rod; 12, second sliding rod; 121, ventilation hole; 122, slot; 123, limiting strip; 2, sampler; 3, camera; 4, locking assembly; 41, bolt; 42, return spring. Specific embodiments
[0027] To make the purpose, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0028] An embodiment of the present application discloses a leakage detection device for a low-temperature economizer in a thermal power plant. Please refer to Figure 1 , the leakage detection device for the low-temperature economizer in the thermal power plant includes a rod body 1 and a sampler 2. The sampler 2 is arranged at the end of the rod body 1. The sampler 2 is in the shape of a shovel or a spoon. The sampler 2 is fixedly connected to the end of the rod body 1 through bolts. When the staff detects the leakage of the low-temperature economizer, they hold the rod body 1 and insert the sampler 2 into the flue of the low-temperature economizer (the gap between the pipes of the low-temperature economizer) to take samples of the accumulated coal ash in the flue. By observing the state of the coal ash, it can be judged whether there is a leakage at this position. The staff can flexibly select the sampling point by moving the rod body 1, with high flexibility, thus facilitating the leakage detection of the low-temperature economizer.
[0029] Please refer to Figure 2, To facilitate the determination of the position of the sampler 2 inside the flue and the ash accumulation situation, and thus facilitate the sampler 2 to sample the coal ash, a camera 3 and a cooling device are provided at one end of the rod body 1 close to the sampler 2. The camera 3 is fixedly connected to the side wall of the rod body 1 by bolts. The camera 3 adopts an endoscope camera 3 equipped with LED lighting, so that the camera 3 can provide a clear field of view inside the narrow flue, and the camera 3 is connected to the display screen in a wired or wireless manner. The staff can see the picture inside the flue in real time through the display screen. Since the low-temperature economizer is usually in a high-temperature state, in order to reduce the possibility of the camera 3 being damaged due to high temperature, the cooling device can perform air-cooling on the camera 3.
[0030] The cooling device includes an air vent hose, a compressed air source and an air vent valve. The air vent hose is communicated with the compressed air source. The compressed air source can be a compressed gas cylinder or an air compressor. One end of the air vent hose away from the compressed air source can blow air to the camera 3. The air vent valve is arranged on the air vent hose for opening or closing the air vent of the air vent hose.
[0031] In order to further improve the cooling efficiency of the gas in the air hose and make the compressed air concentrate on the periphery of the camera 3, the rod body 1 is provided with a hollow structure, and a plurality of air vent holes 121 are opened on the periphery of the camera 3. The air vent hose ventilates into the rod body 1, so that the air inside the rod body 1 is concentrated and ejected from the air vent holes 121, thereby realizing efficient cooling of the camera 3.
[0032] Since the rod body 1 needs to be rotated frequently during the process of sampling the coal ash to make the camera 3 face different directions to clearly judge the coal ash situation inside the flue, it is difficult for the staff to judge the orientation of the sampler 2. To solve the above problem, a sticker is set at one end of the rod body 1 away from the sampler 2 (i.e., the end held by the staff). The sticker is arrow-shaped, and the orientation of the sticker on the cross-section of the rod body 1 is consistent with the feeding direction of the sampler 2, so that the staff can quickly judge the orientation of the sampler 2 by observing the position of the sticker, thus facilitating the sampling of the coal ash.
[0033] As the sampling time increases, the rod body 1 gradually absorbs heat and conducts heat to the holding part of the rod body 1, making the rod body 1 hot, which causes discomfort when the staff holds the rod body 1. To improve the comfort of the staff's holding, an insulating layer is wrapped at one end of the rod body 1 away from the sampler 2. The insulating layer is made of insulating materials such as rubber or silicone. By setting the insulating layer, the possibility of the staff being scalded can be reduced, and the staff can also be more comfortable and steady when holding the rod body 1.
[0034] The ambient environment around the low-temperature economizer may be relatively limited. It may be difficult for the fixed-length rod 1 to find a suitable angle to extend into the flue of the low-temperature economizer due to the limited space. Therefore, in this embodiment, the rod 1 is set as a telescopic rod. During actual use, the rod 1 is adjusted to a suitable length, and when reaching the position to be detected, the sampler 2 is extended into the flue, and the rod 1 is extended to further improve the flexibility of this detection device.
[0035] Specifically, please refer to 1 and Figure 3 , the rod 1 includes multiple sliding rods. The multiple sliding rods are coaxially sleeved in sequence from the end close to the sampler 2 to the end far from the sampler 2. Adjacent sliding rods are slidably connected to each other, and a locking component 4 is provided between the adjacent sliding rods. The locking component 4 is used to lock or release the relative sliding of the sliding rods. In this embodiment, there are two sliding rods, namely the first sliding rod 11 and the second sliding rod 12. The first sliding rod 11 is located at the end of the second sliding rod 12 far from the sampler 2. The sampler 2 is fixedly connected to the second sliding rod 12. The first sliding rod 11 is a cylinder with an opening facing the second sliding rod 12. One end of the second sliding rod 12 close to the first sliding rod 11 extends into the first sliding rod 11 and slides along the length direction of the first sliding rod 11. The locking component 4 is arranged on the first sliding rod 11. The second sliding rod 12 is locked at different positions on the first sliding rod 11 through the locking component 4, so as to realize the adjustment of the length of the rod 1. As an alternative embodiment, the rod 1 can also include three sections, four sections, five sections, etc. of the rod 1 to further improve the flexibility of the rod 1, but the operation will be relatively more troublesome.
[0036] The locking component 4 includes a bolt 41 and a return spring 42. The bolt 41 is vertically arranged and slidably connected to the second sliding rod 12, and the sliding direction is along the length direction of the bolt 41. One end of the bolt 41 far from the second sliding rod 12 is coaxially provided with an abutting ring. The return spring is arranged between the abutting ring and the second sliding rod 12. One end of the return spring 42 is fixedly welded to the abutting ring, and the other end is fixedly welded to the second sliding rod 12. The second sliding rod 12 is provided with a through hole corresponding to the bolt 41, so that the bolt 41 can pass through the through hole under the action of the return spring 42. The first sliding rod 11 is provided with a plurality of slots 122 at equal intervals along its own length direction. The size of the slots 122 is adapted to the bolt 41. The bolt 41 slides towards the slots 122 under the action of the return spring 42. When it is necessary to adjust the length of the rod 1, the bolt 41 is pulled to disengage the bolt 41 from the slot 122, the second sliding rod 12 is slid to the required position, and the bolt 41 is released, so that the bolt 41 is inserted into the slot 122 under the action of the return spring 42, thereby realizing the adjustment of the length of the rod 1, and the operation is relatively simple.
[0037] During the process of the second sliding rod 12 sliding relative to the first sliding rod 11, the second sliding rod 12 may rotate relative to the first sliding rod 11, causing the slot 122 on the second sliding rod 12 to be misaligned with the bolt 41 on the first sliding rod 11, resulting in inconvenience in use. In this embodiment, a limiting strip 123 is provided on the second sliding rod 12. The limiting strip 123 is in the shape of a rectangular strip, and the limiting strip 123 is welded and fixed to the second sliding rod 12 along the length direction of the second sliding rod 12. A limiting groove adapted to the size of the limiting strip 123 is opened at a position on the inner wall of the first sliding rod 11 corresponding to the limiting strip 123. When the second sliding rod 12 slides relative to the first sliding rod 11, the limiting strip 123 slides in the limiting groove, thereby realizing the limitation of the second sliding rod 12 to improve the convenience of use.
[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A leakage detection device for a low-temperature economizer in a thermal power plant, characterized in that, It includes a rod body and a sampler for shoveling coal ash, and the sampler is located at the end of the rod body.
2. The leakage detection device for the low-temperature economizer of a thermal power plant according to claim 1, characterized in that, It further includes a camera and a cooling device provided on the rod body. The camera is located at one end of the rod body close to the sampler, and the cooling device is used to cool the camera.
3. The leakage detection device for the low-temperature economizer of a thermal power plant according to claim 2, characterized in that, The cooling device includes an air vent hose, a compressed air source, and an air vent valve. The air vent hose is connected to the compressed air source, and the air vent valve is provided on the air vent hose and used to control the air vent hose to blow air at the camera.
4. The leakage detection device for the low-temperature economizer of a thermal power plant according to claim 3, wherein, The rod body is hollowly arranged. One end of the air hose away from the compressed air source is located inside the rod body, and the rod body is provided with a plurality of air vent holes around the camera.
5. A leakage detection device for a low-temperature economizer in a thermal power plant according to any one of claims 4, characterized in that, A sticker for showing the orientation of the sampler is provided at one end of the rod body away from the sampler.
6. The leakage detection device for the low-temperature economizer of a thermal power plant according to claim 5, characterized in that, A heat insulation layer is sleeved at one end of the rod body away from the sampler.
7. A leakage detection device for a low-temperature economizer in a thermal power plant according to any one of claims 1-6, characterized in that, The rod body is a telescopic rod.
8. The leakage detection device for the low-temperature economizer of a thermal power plant according to claim 7, characterized in that, The rod body includes multiple sliding rods and a locking assembly provided between adjacent sliding rods. The multiple sliding rods are coaxially sleeved in sequence from the end close to the sampler to the end away from the sampler, and adjacent sliding rods are slidably connected to each other. The locking assembly is used to lock or release the sliding rods.
9. The leakage detection device for the low-temperature economizer of a thermal power plant according to claim 8, characterized in that, The locking assembly includes a bolt and a return spring. The bolt is slidably connected to one of the adjacent two sliding rods, and the other of the adjacent two sliding rods is provided with a plurality of slots at intervals along its own length direction. The return spring is used to drive the bolt to be inserted into the slots.
10. A leakage detection device for a low-temperature economizer in a thermal power plant according to claim 9, characterized in that, One of the adjacent two sliding rods is provided with a limiting strip along its own sliding direction, and the other of the adjacent two sliding rods is provided with a limiting groove adapted to the limiting strip, and the limiting strip slides in the limiting groove.