Boiler tail flue gas oxygen content measuring mechanism

Abstract

The utility model relates to the technical field of boiler flue gas detection, in particular to a boiler tail flue gas oxygen content measuring mechanism which comprises a flue gas circulation pipe, a flue gas leading-out pipe, a filter screen and an oxygen content sensor arranged at the end of the flue gas leading-out pipe, and the flue gas circulation pipe is communicated with the flue gas leading-out pipe. The filter screen extends along the plane, the extending direction is inclined relative to the extending direction of the flue gas eduction pipe, and the filter screen is installed in the flue gas eduction pipe and located between the flue gas circulating pipe and the oxygen content sensor; the beating assembly is elastically and slidably mounted in the flue gas leading-out pipe, the sliding direction of the beating assembly is perpendicular to the filter screen, and the end, away from the filter screen, of the beating assembly extends outwards to form an extension part; the rotating shaft is rotationally mounted on the flue gas leading-out pipe; the filter screen cleaning device is simple in structure, the filter screen is cleaned in a striking mode, dust and particulate matter attached to the filter screen are shaken off through physical acting force, even impurities in pores can be cleaned, and the cleaning effect is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of boiler flue gas detection, and in particular to a mechanism for measuring the oxygen content of flue gas at the tail end of a boiler. Background Technology

[0002] Application No. 201921315706.1 discloses a device for measuring the oxygen content of flue gas at the tail end of a boiler. The device includes a flue gas inlet pipe, an ash removal box, an oxygen measuring tube, an oxygen sensor, and a flue gas outlet pipe. The upper end of the flue gas inlet pipe is fixedly connected to the lower left side of the ash removal box, the oxygen measuring tube is fixedly connected to the right end of the ash removal box, the oxygen sensor is fixedly connected to the right end of the oxygen measuring tube, and the lower end of the flue gas outlet pipe is fixedly connected to the right end of the upper side wall of the oxygen measuring tube. A vertically arranged rectangular frame is provided inside the ash removal box on the right side. A filter screen is fixedly installed inside the rectangular frame, and a sealing plate is fixedly connected to the upper side wall of the ash removal box through the upper side of the rectangular frame. This invention can filter the ash in the flue gas to be measured, avoiding affecting the accuracy of the oxygen sensor's measurement of the flue gas. It also facilitates cleaning of the filter screen, preventing clogging of the mesh, and allows for easy disassembly and replacement of the filter screen, making it convenient for users.

[0003] The above-mentioned device has the following shortcomings: using reciprocating bristles to clean the mesh of the filter screen may not be able to penetrate into each pore for thorough cleaning of small or closely spaced mesh, resulting in poor cleaning effect. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a boiler tail gas oxygen content measuring mechanism. It has a simple structure and uses an impact-type cleaning method to clean the filter screen. Through physical force, the dust and particles attached to the filter screen are shaken off, and even impurities in the pores can be cleaned, thus improving the cleaning effect.

[0005] The present invention relates to a boiler tail gas oxygen content measuring mechanism, comprising a flue gas flow pipe, a flue gas outlet pipe, a filter screen, and an oxygen sensor disposed at the end of the flue gas outlet pipe. The flue gas flow pipe is connected to the flue gas outlet pipe. The filter screen extends along a plane, and the extension direction is inclined relative to the extension direction of the flue gas outlet pipe. The filter screen is installed inside the flue gas outlet pipe and is located between the flue gas flow pipe and the oxygen sensor.

[0006] Also includes:

[0007] The striking component is elastically slidably installed inside the flue gas outlet pipe. The sliding direction of the striking component is perpendicular to the filter screen, and the end of the striking component away from the filter screen extends outward to form an extension.

[0008] A rotating shaft is rotatably mounted on the flue gas outlet pipe, and at least one end of the rotating shaft passes through the flue gas outlet pipe;

[0009] The connecting rod has one end fixedly connected to the rotating shaft, and the other end is rotatably mounted with a roller. The roller contacts the extension part for part of the time when it revolves once.

[0010] The power mechanism is fixed to one end of the rotating shaft.

[0011] As a preferred embodiment of this utility model, a through-hole is provided in a part of the flue gas outlet pipe to allow the filter screen to enter and exit the interior of the flue gas outlet pipe;

[0012] Also includes:

[0013] The limiting plate is fixed inside the flue gas outlet pipe, and the filter screen is inserted into the limiting plate;

[0014] A cover plate is placed at the notch.

[0015] As a preferred embodiment of this utility model, it also includes:

[0016] Locking components are respectively installed on both sides of the flue gas outlet pipe to fix the cover plate;

[0017] Locking components include:

[0018] A fixing block is fixed to the outer wall of the flue gas outlet pipe;

[0019] A ball bearing is elastically and slidably mounted inside a fixed block, with one end of the ball bearing protruding from the fixed block.

[0020] The cover plate has a groove at its end, and one end of the ball extends into the groove.

[0021] As a preferred embodiment of this utility model, a handle is provided on the top of the cover plate.

[0022] As a preferred embodiment of this utility model, it also includes:

[0023] The induced draft fan has its input end connected to the flue gas outlet pipe, and the input end of the induced draft fan is located between the filter screen and the oxygen sensor.

[0024] As a preferred embodiment of this utility model, it also includes:

[0025] The collection trough is connected to the bottom of the flue gas outlet pipe and is located below the filter screen.

[0026] As a preferred embodiment of this utility model, the striking component includes:

[0027] The sliding rod is slidably connected to the flue gas outlet pipe;

[0028] The striking plate is fixed to the end of the sliding rod near the filter screen.

[0029] The cross-sectional area of ​​the striking plate is larger than that of the sliding rod.

[0030] As a preferred embodiment of this utility model, it also includes:

[0031] A fixed rod is fixed to the inner wall of the flue gas outlet pipe, and a sliding rod is slidably connected to the fixed rod.

[0032] A retaining ring is fixed to the sliding rod;

[0033] The elastic element is fitted onto the sliding rod, with its two ends contacting the retaining ring and the retaining rod, respectively.

[0034] As a preferred embodiment of this utility model, the handle is provided with an anti-slip part.

[0035] Compared with the prior art, the beneficial effects of this utility model are as follows: by using the striking method, even impurities in the filter mesh pores can be effectively removed, while avoiding the situation where the brush bristles get stuck in the pores, thus improving the cleaning effect. During use, regularly striking the filter mesh can prevent the filter mesh from clogging due to the accumulation of impurities, ensuring the smooth flow of flue gas. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of this utility model;

[0037] Figure 2 This is a cross-sectional view of the flue gas outlet pipe;

[0038] Figure 3 It is a cross-sectional view of the flue gas outlet pipe, cover plate and locking parts;

[0039] Figure 4 yes Figure 3 Enlarged view of part A in the middle;

[0040] Figure 5 It is an exploded view of the flue gas outlet pipe, locking parts, filter screen, impact assembly, rotating shaft, and fixing rod;

[0041] The following are labels in the attached diagram: 1. Flue gas flow pipe; 2. Flue gas outlet pipe; 3. Filter screen; 4. Oxygen sensor; 5. Extension; 6. Rotating shaft; 7. Connecting rod; 8. Roller; 9. Power mechanism; 10. Notch; 11. Limiting plate; 12. Cover plate; 13. Locking element; 131. Fixing block; 132. Ball bearing; 133. Groove; 14. Handle; 15. Exhaust fan; 16. Collection trough; 17. Sliding rod; 18. Striking plate; 19. Fixing rod; 20. Fixing ring; 21. Elastic element. Detailed Implementation

[0042] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Secondly, the term "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0045] Example

[0046] Reference Figures 1-5 This embodiment provides a boiler tail gas oxygen content measurement mechanism, including a flue gas flow pipe 1, a flue gas outlet pipe 2, a filter screen 3, and an oxygen sensor 4 disposed at the end of the flue gas outlet pipe 2. The flue gas flow pipe 1 is connected to the flue gas outlet pipe 2 and is used to connect to the boiler tail. The flue gas outlet pipe 2 is used to allow flue gas to flow to the oxygen sensor 4 for oxygen content testing. The filter screen 3 extends along a plane, and the extension direction is inclined relative to the extension direction of the flue gas outlet pipe 2. The filter screen 3 is installed inside the flue gas outlet pipe 2 and is located between the flue gas flow pipe 1 and the oxygen sensor 4. Figure 2 As shown, the top of the filter screen 3 is inclined toward the flue gas flow pipe 1;

[0047] Also includes:

[0048] Reference Figure 2 and Figure 5 The striking component is elastically slidably installed inside the flue gas outlet pipe 2. The sliding direction of the striking component is perpendicular to the filter screen 3. The end of the striking component away from the filter screen 3 extends outward to form an extension 5.

[0049] A rotating shaft 6 is rotatably mounted on the flue gas outlet pipe 2, and at least one end of the rotating shaft 6 passes through the flue gas outlet pipe 2;

[0050] Reference Figure 2 and Figure 5 The connecting rod 7 has one end fixedly connected to the rotating shaft 6, and the other end is rotatably mounted with a roller 8. The roller 8 contacts the extension part 5 for part of the time when it revolves once.

[0051] Reference Figure 1 The power mechanism 9 is fixed to one end of the rotating shaft 6 and uses an electric motor.

[0052] The specific working process of this device is as follows: Flue gas flows along the flue gas flow pipe 1 at the tail end of the boiler, and some flue gas enters the flue gas outlet pipe 2. During this process, most of the solid particles in the flue gas are intercepted by the inclined filter screen 3, preventing these particles from affecting the normal operation of the oxygen sensor 4. When the particles in the flue gas gradually accumulate on the filter screen 3, it will affect the smooth flow of the flue gas and the accurate measurement of oxygen content. At this time, the striking component comes into play. When the power mechanism 9 drives the rotating shaft 6 to rotate clockwise, the connecting rod 7 drives the roller 8 to perform circular motion. During the revolution of the roller 8, there is a period of time when it interacts with the striking component. The extension 5 of the component contacts the filter screen 3. During the contact process, the distance between the striking component and the filter screen 3 gradually increases, and the elastic force on the striking component gradually increases. When the roller 8 disengages from the striking component, the striking component will quickly move closer to the filter screen 3 under the action of a large elastic force, thereby striking the filter screen 3 and removing the impurities on it. This keeps the filter screen 3 unobstructed and ensures that the flue gas can reach the oxygen sensor 4 smoothly, thereby ensuring the accuracy of the measurement results. Since the striking method is used, even impurities in the pores can be cleaned, and the bristles are prevented from getting stuck in the pores, thus improving the cleaning effect.

[0053] In practical applications, if filter 3 is inconvenient to disassemble, maintenance personnel need to spend more time and effort to clean or replace it. This not only reduces work efficiency but may also damage the equipment due to improper operation. This utility model provides an optimized solution, referring to... Figure 2 and Figure 5 The flue gas outlet pipe 2 has a through-hole 10 in a part, allowing the filter screen 3 to enter and exit the flue gas outlet pipe 2.

[0054] Also includes:

[0055] The limiting plate 11 is fixed inside the flue gas outlet pipe 2. The limiting plate 11 has a door-shaped cross section. The filter screen 3 is inserted into the limiting plate 11.

[0056] Cover plate 12 is provided at notch 10;

[0057] The filter screen 3 can enter and exit the flue gas outlet pipe 2 through the notch 10. When installing the filter screen 3, insert the filter screen 3 into the limiting plate 11 through the notch 10, and then lock the cover plate 12. When it is necessary to remove the filter screen 3, open the cover plate 12 and then pull out the filter screen 3. Through the design of the notch 10 and the limiting plate 11, maintenance personnel can quickly install and remove the filter screen 3, which greatly reduces maintenance time.

[0058] In practical applications, if the fixing method of the cover plate 12 is not convenient enough, maintenance personnel will encounter many inconveniences when cleaning or replacing the filter screen 3. This utility model provides an optimized solution, referring to... Figure 1 and Figure 4 It also includes:

[0059] Locking components 13 are respectively provided on both sides of the flue gas outlet pipe 2 to fix the cover plate 12;

[0060] Locking element 13 includes:

[0061] The fixing block 131 is fixed to the outer wall of the flue gas outlet pipe 2;

[0062] The ball 132 is elastically slidably installed in the fixed block 131, and one end of the ball 132 protrudes from the fixed block 131. More specifically, the fixed block 131 has a through hole, and a spring is installed in the through hole. One end of the spring abuts against the ball 132, and the inner wall of the through hole near the cover plate 12 is an arc shape that fits tightly against the ball 132, which can prevent the ball 132 from moving out of the fixed block 131.

[0063] Among them, a groove 133 is provided at the end of the cover plate 12, and one end of the ball 132 extends into the groove 133;

[0064] When installing the cover plate 12, align the cover plate 12 with the notch 10 and gently push it in, and align the groove 133 with the ball 132 of the fixing block 131. Under the pressure of the cover plate 12, the ball 132 will move away from the flue gas outlet pipe 2. When the cover plate 12 is pressed against the outer wall of the flue gas outlet pipe 2, under the action of elasticity, the ball 132 is in the groove 133, which plays a role in fixing the cover plate 12.

[0065] When it is necessary to remove the cover plate 12, pull the cover plate 12 outward. Under the action of external force, the cover plate 12 squeezes the ball 132 until the cover plate 12 and the ball 132 are separated. Then the ball 132 is reset under the action of elasticity.

[0066] With the design of the ball bearing 132 and the groove 133, the disassembly and assembly of the cover plate 12 becomes very simple, and maintenance personnel can complete the operation quickly.

[0067] If the cover 12 is not specifically designed to assist in its removal, maintenance personnel will find it very inconvenient to clean or replace the filter 3. As a preferred embodiment of this utility model, [referring to...] Figure 1 The top of the cover plate 12 is provided with a handle 14. By providing a handle 14 on the top of the cover plate 12, maintenance personnel can more easily pick up and operate the cover plate 12, reducing the difficulty and time of operation.

[0068] In practical applications, the lack of effective flue gas guidance measures may lead to inaccurate oxygen content measurements. As a preferred embodiment of this invention, [following the previous sentence]... Figure 2 It also includes:

[0069] The induced draft fan 15 has its input end connected to the flue gas outlet pipe 2, and its input end is located between the filter screen 3 and the oxygen sensor 4.

[0070] When it is necessary to test the oxygen content of flue gas, start the induced draft fan 15. The induced draft fan 15 draws the flue gas from the flue gas flow pipe 1 to the flue gas outlet pipe 2, so that the flue gas passes through the filter screen 3 and reaches the oxygen sensor 4, and then the test is performed. When the induced draft fan 15 is not running, a small amount of flue gas in the flue gas flow pipe 1 will enter the flue gas outlet pipe 2, which greatly reduces the load on the filter screen 3.

[0071] In practical applications, if effective impurity collection measures are lacking, impurities and particulate matter detached from the filter screen 3 during the cleaning process may scatter inside the flue gas outlet pipe 2, affecting not only the cleanliness of the equipment but also potentially causing secondary pollution. As a preferred embodiment of this utility model, refer to... Figure 2 It also includes:

[0072] The collection trough 16 is connected to the bottom of the flue gas outlet pipe 2. The collection trough 16 is located below the filter screen 3. In order to facilitate the disassembly and assembly of the collection trough 16, the collection trough 16 is connected to the flue gas outlet pipe 2 by a thread. Particles that detach from the filter screen 3 will fall into the collection trough 16. The collection trough 16 should be cleaned regularly.

[0073] As a preferred embodiment of this utility model, refer to Figure 2 and Figure 5 The striking components include:

[0074] The sliding rod 17 is slidably connected to the flue gas outlet pipe 2, wherein the extension 5 is fixed on the sliding rod 17;

[0075] The striking plate 18 is fixed to the end of the sliding rod 17 near the filter screen 3;

[0076] Among them, the cross-sectional area of ​​the striking plate 18 is larger than the cross-sectional area of ​​the sliding rod 17;

[0077] When the roller 8 revolves, the roller 8 drives the extension 5, the sliding rod 17 and the striking plate 18 away from the filter screen 3. After the roller 8 separates from the extension 5, the striking plate 18 strikes the filter screen 3. Since the cross-sectional area of ​​the striking plate 18 is larger than that of the sliding rod 17, the contact area between the striking plate 18 and the filter screen 3 is greatly increased, which plays a role in preventing damage to the filter screen 3.

[0078] As a preferred embodiment of this utility model, refer to Figure 2 and Figure 5 It also includes:

[0079] Fixed rod 19 is fixed to the inner wall of flue gas outlet pipe 2, and sliding rod 17 is slidably connected to fixed rod 19;

[0080] The retaining ring 20 is fixed to the sliding rod 17;

[0081] The elastic element 21 is fitted onto the sliding rod 17. The two ends of the elastic element 21 are in contact with the fixed ring 20 and the fixed rod 19, respectively. The elastic element 21 is a spring.

[0082] With the above configuration, the striking component slides elastically within the flue gas outlet pipe 2, such as... Figure 2 As shown, driven by the roller 8, the extension 5, sliding rod 17, striking plate 18, and fixing ring 20 are all moved away from the filter screen 3. At this time, the elastic element 21 is compressed. When the roller 8 is separated from the extension 5, under the elastic force of the elastic element 21, the extension 5, sliding rod 17, striking plate 18, and fixing ring 20 are pushed to quickly approach the filter screen 3 and strike the filter screen 3, thereby cleaning the filter screen 3.

[0083] As a preferred embodiment of this utility model, the handle 14 is provided with an anti-slip part, which can be covered with dot pattern, line pattern, grid pattern or soft rubber material. The purpose is to increase the friction between the hand and the handle, thereby making the grip more stable and reducing accidents caused by slipping.

[0084] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0085] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A boiler tail gas oxygen content measuring mechanism, comprising a flue gas flow pipe (1), a flue gas outlet pipe (2), a filter screen (3), and an oxygen sensor (4) disposed at the end of the flue gas outlet pipe (2), wherein the flue gas flow pipe (1) is connected to the flue gas outlet pipe (2); characterized in that, The filter (3) extends along the plane and the extension direction is inclined relative to the extension direction of the flue gas outlet pipe (2). The filter (3) is installed inside the flue gas outlet pipe (2) and the filter (3) is located between the flue gas flow pipe (1) and the oxygen sensor (4). Also includes: The striking component is elastically slidably installed inside the flue gas outlet pipe (2). The sliding direction of the striking component is perpendicular to the filter screen (3). The end of the striking component away from the filter screen (3) extends outward to form an extension (5). A rotating shaft (6) is rotatably mounted on the flue gas outlet pipe (2), and at least one end of the rotating shaft (6) passes through the flue gas outlet pipe (2); The connecting rod (7) has one end fixedly connected to the rotating shaft (6) and the other end rotatably mounted with a roller (8). The roller (8) contacts the extension (5) for part of the time when it revolves once. The power mechanism (9) is fixed to one end of the rotating shaft (6).

2. The boiler tail gas oxygen content measuring mechanism as described in claim 1, characterized in that, The flue gas outlet pipe (2) has a through notch (10) in a part, so that the filter screen (3) can enter and exit the flue gas outlet pipe (2); Also includes: The limiting plate (11) is fixed inside the flue gas outlet pipe (2), and the filter screen (3) is inserted into the limiting plate (11); A cover plate (12) is disposed at the notch (10).

3. The boiler tail gas oxygen content measuring mechanism as described in claim 2, characterized in that, Also includes: Locking components (13) are respectively disposed on both sides of the flue gas outlet pipe (2) for fixing the cover plate (12); Locking element (13) includes: A fixing block (131) is fixed to the outer wall of the flue gas outlet pipe (2); A ball (132) is elastically slidably mounted in the fixed block (131), and one end of the ball (132) protrudes from the fixed block (131); The cover plate (12) has a groove (133) at its end, and one end of the ball (132) extends into the groove (133).

4. The boiler tail gas oxygen content measuring mechanism as described in claim 2, characterized in that, A handle (14) is provided on the top of the cover plate (12).

5. The boiler tail gas oxygen content measuring mechanism as described in claim 1, characterized in that, Also includes: An induced draft fan (15) is provided, the input end of which is connected to the flue gas outlet pipe (2), and the input end of the induced draft fan (15) is located between the filter screen (3) and the oxygen sensor (4).

6. The boiler tail gas oxygen content measuring mechanism as described in claim 1, characterized in that, Also includes: The collection trough (16) is connected to the bottom of the flue gas outlet pipe (2) and is located below the filter screen (3).

7. The boiler tail gas oxygen content measuring mechanism as described in claim 1, characterized in that, The striking component includes: The sliding rod (17) is slidably connected to the flue gas outlet pipe (2); The striking plate (18) is fixed to the sliding rod (17) at one end near the filter screen (3); The cross-sectional area of ​​the striking plate (18) is larger than that of the sliding rod (17).

8. The boiler tail gas oxygen content measuring mechanism as described in claim 7, characterized in that, Also includes: A fixed rod (19) is fixed to the inner wall of the flue gas outlet pipe (2), and a sliding rod (17) is slidably connected to the fixed rod (19); A retaining ring (20) is fixed to the sliding rod (17); An elastic element (21) is fitted onto the sliding rod (17), and both ends of the elastic element (21) are in contact with the fixing ring (20) and the fixing rod (19) respectively.

9. The boiler tail gas oxygen content measuring mechanism as described in claim 4, characterized in that, The handle (14) is provided with an anti-slip part.

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