Protective device for heating surface pipeline of boiler in power plant
By designing a special protective device, the heating surface pipeline is wrapped in a narrow space with arc-shaped hooks and semicircular connections, the problem of the heating surface pipeline in the tail flue of the boiler of the thermal power plant is not effectively protected, and all-round protection of the internal pipeline of the pipe line is achieved, reducing the maintenance period.
Patent Information
- Application Number
- CN202421444252.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-24
AI Technical Summary
In the tail flue of boiler at the thermal power plant, due to the small space of the heating surface pipeline, it is difficult to install conventional anti-wear devices, resulting in the inability to effectively protect the internal pipes of the pipes and easily blown by high-pressure steam, affecting the unit maintenance period.
A protective device including protective body 1, protective body 2 and protective body 3 is designed. Through arc-shaped hooks and semicircular connections, it can wrap the heating surface pipes in a narrow space and prevent damage from high-pressure steam and flue gas.
This device can effectively protect the heating surface pipes in the tail flue of the boiler, avoid damage to high-pressure steam and flue gas, reduce maintenance period, and solve the problem that the pipe drainage internal pipes cannot be effectively protected in the prior art.
Smart Images
Figure CN222824340U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of boiler equipment, and in particular to a protective device for heating surface pipelines of a boiler in a power plant. Background Art
[0002] The boiler is one of the three main machines in a thermal power plant. The inspection and maintenance quality of the boiler equipment is the guarantee for the safe and stable operation of the unit. The heating surface tubes are the main components of the boiler. The quality of the heating surface tubes is directly related to whether the boiler can operate normally.
[0003] During the normal operation of the unit, the operating environment of the heating surface pipes is relatively harsh. In the high temperature and high pressure environment, they must not only withstand the wear of fly ash carried by high temperature flue gas, but also withstand the blow damage of high pressure steam ejected by steam soot blowers and other damages. Therefore, in order to prevent the heating surface pipe wall from being damaged in such a harsh operating environment, certain measures must be taken to protect the heating surface pipes. At present, the conventional protection method for the heating surface is to install semicircular anti-wear tiles in the direction where the pipe is easily damaged.
[0004] As the boiler system of modern thermal power plants is huge and complex, especially the dense arrangement of the heating surface pipes of the flue at the tail of the boiler and the small maintenance space, it is often only possible to conduct a comprehensive inspection of the pipes with large outer working space and install semi-circular anti-wear tiles for single-sided protection, while the pipes inside the pipe row cannot be protected by conventional anti-wear devices (circular anti-wear tiles) due to the small space. This results in the pipes inside the pipe row not being effectively protected, and being damaged by the high-pressure steam sprayed by the soot blower. After the pipes inside the pipe row are damaged, they are often unable to be inspected and discovered in time due to space limitations. At the same time, due to the small maintenance space, it is difficult to replace them and it is time-consuming and labor-intensive, which seriously affects the maintenance period of the unit. Utility Model Content
[0005] The present application provides a protective device for heating surface pipes of a boiler in a power plant, which can effectively protect the heating surface pipes in the difficult-to-protect position in the boiler tail flue.
[0006] The above-mentioned purpose of the present application is achieved through the following technical solutions:
[0007] A protective device for a heating surface pipeline of a boiler in a power plant, comprising a protective body 1, a protective body 2 and a protective body 3, wherein one end of the protective body 1 and the protective body 2 are connected together, and the other end of the protective body 1 and the protective body 2 are fixedly connected together through the protective body 3;
[0008] The length and width of the first and second protective bodies are equal, and the sizes of the first and second protective bodies match the number of boiler heating surface pipes to be protected;
[0009] The thickness of the overall structure of the protective body 1 and the protective body 2 is smaller than the gap width of adjacent boiler heating surface pipes.
[0010] Furthermore, one end of the protective body 1 and the protective body 2 connected to each other is in an arc-shaped hook shape, and the diameter of the arc-shaped hook part of the protective body 1 and the protective body 2 is equal to the diameter of a single boiler heating pipe.
[0011] Furthermore, the three cross sections of the protective body are in the shape of a semicircle, and the diameter of the semicircle is equal to the diameter of a single boiler heating pipe.
[0012] Furthermore, the end of the arc-shaped hook portion of the protective body one is evenly provided with a plurality of protrusions, and the end of the arc-shaped hook portion of the protective body two is evenly provided with a plurality of penetrating grooves, and the number of the grooves is equal to the number of the protrusions; when the protective body one and the protective body two are assembled together, the plurality of protrusions can be respectively inserted into the plurality of grooves.
[0013] Furthermore, the protective body three is fixed to the protective body one and the protective body two by welding.
[0014] Furthermore, the arc lengths of the arc-shaped hook portions of the protective body 1 and the protective body 2 are not less than one quarter of the circumference of a single boiler heating surface pipe.
[0015] Furthermore, the protective body 1, the protective body 2 and the protective body 3 are all made of 3mm thick 304 stainless steel.
[0016] In summary, the present application includes at least one of the following beneficial technical effects:
[0017] When it is necessary to protect the heating surface pipes of the tail flue of the boiler in a thermal power plant, the workers will use their hands to support the protective body one and the protective body two and insert them into the narrow gaps on both sides of the pipe row to be protected, and overlap the front ends of the protective body one and the protective body two to temporarily form a whole, and then connect the two ends of the protective body three to the other ends of the protective body one and the protective body two respectively. In this way, the protective body one, the protective body two and the protective body three can achieve all-round wrapping protection for the pipe row to be protected, avoiding the heating surface pipe row from being damaged by the high-pressure soot blowing steam in the boiler. Compared with the semi-circular anti-wear tiles in the prior art, the present application can also effectively protect the pipes inside the pipe row, thereby avoiding the pipes inside the pipe row from being damaged by high-pressure steam due to lack of effective protection, thereby increasing the subsequent maintenance period. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 It is a schematic diagram of the overall structure of the protective device of the present application after being assembled together;
[0020] Figure 2 yes Figure 1 The structural diagram of the middle protection body 1;
[0021] Figure 3 This is the main view of the protection body 1 of the present application;
[0022] Figure 4 yes Figure 1 A schematic diagram of the structure of the second protection body of the present application;
[0023] Figure 5 It is a top view of the second protection body of the present application;
[0024] Figure 6 yes Figure 1 Schematic diagram of the structure of the middle protection body 3;
[0025] Figure 7 This is the main view of the protection body three of this application;
[0026] Figure 8 It is a state diagram of a portion of the heating surface pipes in the boiler when being used after being protected by the protective device of the present application.
[0027] Figure numerals: 1. Protective body one; 2. Protective body two; 3. Protective body three; 4. Bump; 5. Groove. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.
[0029] like Figure 1-Figure 8As shown, a protective device for the heating surface pipelines of a power plant boiler disclosed in the present application includes a protective body 1, a protective body 2 2 and a protective body 3 3, wherein one end of the protective body 1 and the protective body 2 2 are connected together, and the other end of the protective body 1 and the protective body 2 2 are fixedly connected together through the protective body 3 3; the length and width of the protective body 1 and the protective body 2 2 are equal, and the dimensions of the protective body 1 and the protective body 2 2 match the number of boiler heating surface pipelines to be protected; the thickness of the overall structure of the protective body 1 and the protective body 2 2 is smaller than the gap width between adjacent boiler heating surface pipelines.
[0030] In the above embodiments, the heating surface pipes at the flue at the rear of the boiler are usually arranged in multiple rows in a serpentine shape. When the boiler is in use, the high-pressure steam blown out by the soot blower and the fly ash carried by the high-temperature flue gas in the furnace will pass through these heating surface pipes. As time accumulates, these heating surface pipes are easily damaged, affecting their normal use. Therefore, protection is generally performed on the outside of the heating surface pipes. A commonly used method is to install semicircular anti-wear tiles at the vulnerable end of each row of heating surface pipes (which can be called a tube row). Although these semicircular anti-wear tiles can protect the heating surface pipes at the end of each row, due to the narrow space between adjacent tube rows, it is difficult to install the semicircular anti-wear tiles on the pipes in the middle of the tube row. The semicircular anti-wear tiles can only block the high-pressure steam and the flue gas with fly ash for the heating surface pipes with installation conditions at the end of the tube row. When passing over the tube row, these high-pressure steam and flue gas will still contact with the heating surface pipes inside the tube row and damage them.
[0031] The length, width and thickness of the overall structure of the protective body 1 in this application can be referred to as Figure 2 and Figure 3 The length, width and thickness of the protective body 2 are marked in the area, and the length, width and thickness of the protective body 2 are marked in the area. Figure 4 and Figure 5 .
[0032] Since the thickness of the overall structure of the protective body 1 and the protective body 2 of the present application is smaller than the gap width between adjacent tube rows (the gap size is equal to the gap width between adjacent boiler heating surface pipes), the protective body 1 and the protective body 2 2 can both pass through the gaps between adjacent boiler heating surface pipes smoothly. When the protective body 1 and the protective body 2 2 extend to the outside of the deepest boiler heating surface pipe to be protected, one end of the protective body 1 and the protective body 2 2 can be temporarily overlapped. Since the sizes of the protective body 1 and the protective body 2 2 match the number of boiler heating surface pipes to be protected (the number of boiler heating surface pipes to be protected can be adaptively selected according to site conditions in actual production), after the other ends of the protective body 1 and the protective body 2 2 are fixedly connected together with the protective body 3 3, a full-range wrapping protection can be formed for the boiler heating surface pipes in the range to be protected (the effect after installation is as follows: Figure 8 As shown in the figure, in this way, neither the flue gas nor the high-pressure steam in the boiler will cause wear or blow damage to the wrapped boiler heating surface pipes. Correspondingly, the problem that the pipes that are difficult to be protected by traditional semi-circular anti-wear tiles need to be repaired in a small maintenance space due to damage, which is time-consuming and labor-intensive, is effectively solved.
[0033] Furthermore, if Figure 1 , Figure 2 , Figure 4 and Figure 8 As shown, the ends of the protective body 1 and the protective body 2 2 connected to each other are both in the shape of arc hooks, and the diameters of the arc hook parts of the protective body 1 and the protective body 2 2 are equal to the diameter of a single boiler heating pipe.
[0034] In the above embodiments, the protective body 1 and the protective body 2 of the present application are arranged in the above manner, so that when the protective body 1 and the protective body 2 are overlapped, they can better fit with the surface of the deep heating surface pipe, thereby providing better protection for the heating surface pipe at the end in the narrow gap between the pipe rows.
[0035] Furthermore, if Figure 1 , Figure 6 , Figure 7 and Figure 8 As shown, the cross-section of the protective body 3 is in the shape of a semicircle, and the diameter of the semicircle is equal to the diameter of a single boiler heating pipe.
[0036] In the above embodiments, in order to ensure that high-temperature steam and flue gas can pass smoothly through the gaps between the heating surface pipes, a protective device composed of a protective body 1, a protective body 2 2 and a protective body 3 3 only isolates and protects one row of pipes in the flow direction of flue gas and high-temperature steam. Since the arc-shaped hook parts of the protective body 1 and the protective body 2 2 can just wrap half of the heating surface pipe on the same side after overlapping, the distance between the other ends of the protective body 1 and the protective body 2 2 is equal to the diameter of the heating surface pipe. In order to ensure that the overlapping protective body 1 and the protective body 2 2 can be connected together, the lengths of the two ends of the protective body 3 3 of the present application are equal to the diameter of a single boiler heating pipe. The protective body 3 3 of the present application is set in a semicircular shape, which can reduce its space occupancy rate in the gap between the heating surface pipes, and at the same time ensure its fit with the heating surface pipe on the corresponding side, thereby improving the fixing effect between them.
[0037] Furthermore, if Figure 1-Figure 5 As shown, the end of the arc-shaped hook portion of the protective body 1 is evenly provided with a plurality of protrusions 4, and the end of the arc-shaped hook portion of the protective body 2 is evenly provided with a plurality of penetrating grooves 5, and the number of the grooves 5 is equal to the number of the protrusions 4; when the protective body 1 and the protective body 2 are assembled together, the plurality of protrusions 4 can be respectively inserted into the plurality of grooves 5.
[0038] In the above embodiments, since the arc-shaped hook parts of the protective body 1 and the protective body 2 2 need to penetrate deep into the pipe row, it is difficult to weld them together. Therefore, the method adopted in the present application is to extend the protective body 1 and the protective body 2 2 from both sides of one row of the heating surface pipes in the direction of flue gas flow to suitable positions, and then adjust the positions of the protective body 1 and the protective body 2 2 so that the protrusion 4 on the protective body 1 is inserted into the groove 5 on the protective body 2 2, so that the arc-shaped hook ends of the protective body 1 and the protective body 2 2 are temporarily overlapped together, so that they can limit each other to prevent deviation from affecting subsequent welding, and the operation is also very simple.
[0039] Furthermore, the protective body three 3 is fixed to the protective body one 1 and the protective body two 2 by welding.
[0040] In the above embodiments, the two ends of the protective body three 3 are fixed together with the protective body one 1 and the protective body two 2 respectively by welding, so that not only a stable connection relationship can be formed between the three, but also the gaps at their connections are filled with welding materials, which can make the sealing of the protective device surrounded by them better, preventing steam flow and the like from entering from the gaps at their connections and affecting the protective effect of the entire protective device.
[0041] Furthermore, if Figure 1 and Figure 8As shown, the arc lengths of the arc-shaped hook parts of the protective body 1 and the protective body 2 2 are not less than one quarter of the circumference of a single boiler heating surface pipe.
[0042] In the above embodiment, since the protrusion 4 at the end of the arc-shaped hook part on the protective body 1 needs to be inserted into the groove 5 at the end of the arc-shaped hook part of the protective body 2, a certain overlap is required between the two. If the arc lengths of the arc-shaped hook parts of the protective body 1 and the protective body 2 are both less than one-fourth of the circumference of a single heating surface pipe, it is difficult to complete the overlap operation between the two. In actual use, the length of the hook parts of the protective body 1 and the protective body 2 should not be too long. When it exceeds one-half of the circumference of the heating surface pipe, it will be difficult for the hook parts of the protective body 1 and the protective body 2 to be hung on the outside of the deep heating surface pipe.
[0043] Furthermore, the protective body 1, the protective body 2 and the protective body 3 are all made of 3 mm thick 304 stainless steel.
[0044] In the above embodiments, the present application uses 3mm 304 stainless steel to make protective body 1, protective body 2 and protective body 3, so that they can ensure that they have sufficient corrosion resistance while not being too bulky, and the 3mm thick stainless steel plate is also relatively easy to process.
[0045] The implementation principle of this embodiment is as follows: before use, determine the number of pipes to be protected, and then find the protective body 1 and protective body 2 2 that are made in advance and match the number of pipes to be protected from the warehouse; during installation and use, the worker will use his hands to support the protective body 1 and protective body 2 and insert them into the narrow gaps on both sides of the pipe row to be protected, and after extending them to the appropriate position, insert the protrusion 4 on the arc-shaped hook end of the protective body 1 into the groove 5 of the arc-shaped hook part of the protective body 2 2, so that the two are overlapped together to form a temporary whole, and then place the protective body 3 3 at the other end of the protective body 1 and the protective body 2 2, and weld them together, so that the protective body 1, the protective body 2 2 and the protective body 3 3 form an all-round wrapping protection effect on the outside of the pipe row to be protected, thereby preventing these pipe rows from being damaged by high-pressure soot blowing steam or flue gas during use, and increasing the burden of subsequent maintenance work. Compared with the prior art, the assembled protective device of the present application can provide better protection for several tubes in the serpentine tube array in the boiler tail flue which cannot be protected by conventional semicircular anti-wear tiles due to space limitations.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A protective device for heating surface pipelines of a power plant boiler, characterized in that: It comprises a protective body 1 (1), a protective body 2 (2) and a protective body 3 (3), wherein one end of the protective body 1 (1) and the protective body 2 (2) are connected together, and the other end of the protective body 1 (1) and the protective body 2 (2) are fixedly connected together through the protective body 3 (3); The length and width of the protective body 1 (1) and the protective body 2 (2) are equal, and the dimensions of the protective body 1 (1) and the protective body 2 (2) match the number of boiler heating surface pipes to be protected; The thickness of the overall structure of the protective body 1 (1) and the protective body 2 (2) is smaller than the gap width of adjacent boiler heating surface pipes.
2. The protective device for heating surface pipelines of a power plant boiler according to claim 1, characterized in that: One end of the protective body 1 (1) and the protective body 2 (2) connected to each other is in the shape of an arc hook, and the diameter of the arc hook portion of the protective body 1 (1) and the protective body 2 (2) is equal to the diameter of a single boiler heating pipe.
3. The protective device for heating surface pipelines of a power plant boiler according to claim 2, characterized in that: The shape of the cross section of the protective body three (3) is semicircular, and the diameter of the semicircle is equal to the diameter of a single boiler heating pipe.
4. The protective device for heating surface pipelines of a power plant boiler according to claim 2, characterized in that: The end of the arc-shaped hook portion of the protective body one (1) is evenly provided with a plurality of protrusions (4), and the end of the arc-shaped hook portion of the protective body two (2) is evenly provided with a plurality of penetrating grooves (5), and the number of the grooves (5) is equal to the number of the protrusions (4); when the protective body one (1) and the protective body two (2) are assembled together, the plurality of protrusions (4) can be respectively inserted into the plurality of grooves (5).
5. The protective device for heating surface pipelines of a power plant boiler according to claim 1, characterized in that: The protective body three (3) is fixed to the protective body one (1) and the protective body two (2) by welding.
6. The protective device for heating surface pipelines of a power plant boiler according to any one of claims 1 to 5, characterized in that: The arc lengths of the arc-shaped hook portions of the protective body 1 (1) and the protective body 2 (2) are not less than one quarter of the circumference of a single boiler heating surface pipe.
7. The protective device for heating surface pipelines of a power plant boiler according to any one of claims 1 to 5, characterized in that: The protective body 1 (1), the protective body 2 (2) and the protective body 3 (3) are all made of 304 stainless steel with a thickness of 3 mm.