Cleaning device for boiler flue gas sampling probe
By designing a boiler flue gas sampling probe cleaning device including a flue gas sampling probe, a pipe, a bracket, a barrier mechanism and a control mechanism, the problem of inaccurate detection caused by dust accumulation in the probe is solved, and efficient and timely cleaning and impact isolation on other devices are achieved.
Patent Information
- Application Number
- CN202421483683.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The detection accuracy of the boiler flue gas detection probe is affected due to ash accumulation and other reasons, and the existing manual cleaning methods are inefficient and cannot clean impurities in time.
A boiler flue gas sampling probe cleaning device is designed, including a flue gas sampling probe, a first through pipe, a second through pipe, a bracket, a barrier mechanism and a control mechanism. Clean up the dust on the probe by back-blowing compressed air, and avoid the impact on other detection devices through the baffle pushed out by the cylinder.
It is realized that the dust accumulation on the flue gas detection probe is cleaned at any time without disassembling the detection device, avoiding the impact on other detection devices during cleaning, and improving detection accuracy and cleaning efficiency.
Smart Images
Figure CN222856169U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of smoke detection, in particular to a boiler smoke sampling probe cleaning device. Background Art
[0002] During the production process in the power workshop of a cigarette factory, a large amount of flue gas will be generated by boiler combustion. The flue gas contains a large amount of harmful substances. The flue gas needs to be treated before being discharged into the atmosphere. During the discharge process, various indicators in the flue gas need to be detected in real time to ensure that it meets the emission requirements. In order to detect various indicators in the flue gas, different types of detection devices will be installed on the flue gas emission chimney. However, the flue gas often contains various impurities, which will accumulate on the detection probe and affect the detection accuracy, and even cause the probe to be blocked. At present, in order to ensure the accuracy of the detection, it is necessary to manually remove the detection probe for cleaning regularly. This method is inefficient and cannot clean up impurities such as dust in time, resulting in the detection accuracy being affected. Therefore, a built-in cleaning device for the detection probe is needed, which can clean the dust and other debris on the probe at any time, and because a variety of detection devices will be installed on the flue gas emission chimney, a certain device cannot affect other flue gas detection sensors during the cleaning process. Utility Model Content
[0003] In order to overcome at least one of the defects of the prior art, the utility model provides a boiler flue gas sampling probe cleaning device to solve the problem that the detection accuracy of the detection probe is affected due to dust accumulation and other reasons during the detection of boiler flue gas emissions in the power workshop of a cigarette factory.
[0004] The technical solution adopted by the utility model to solve the problem is:
[0005] A boiler flue gas sampling probe cleaning device comprises a flue gas sampling probe, one side of the flue gas sampling probe is fixedly connected to a first through pipe, the first through pipe is fixedly connected to a flue gas detector via a second through pipe, the first through pipe is fixedly connected to the second through pipe, a bracket is provided on the second through pipe, a blocking mechanism is fixedly connected to the bracket, and a control mechanism is connected to the blocking mechanism.
[0006] Through the above scheme, since in actual production, a number of sensors (such as temperature, pressure and flow sensors, etc.) are usually installed on the chimney, and due to the space limitations of the chimney, the installation positions of these sensors are usually close, which may cause abnormal fluctuations in the detection data of other sensors when detecting flue gas. Therefore, the control mechanism can avoid affecting other sensors through the blocking mechanism when cleaning the flue gas sampling probe.
[0007] Furthermore, the blocking mechanism includes a blocking plate and a cylinder, the cylinder is fixedly mounted on a bracket, the cylinder output shaft is fixedly connected to the blocking plate, a first air pipe and a second air pipe are respectively provided on the front and rear ends of the cylinder, and the first air pipe and the second air pipe are connected to a control mechanism.
[0008] Through the above further solution, when the cylinder is pushed outward, it drives the baffle to move below the flue gas sampling probe.
[0009] Furthermore, the control mechanism includes a two-position three-way solenoid valve, a three-way air pipe, a third air pipe, a one-way valve and a flow meter. The two-position three-way solenoid valve is provided with a working air port, an air inlet and an air outlet. The working air port is connected to the three-way air pipe, and the three-way air pipe is respectively connected to the first air pipe, the second air pipe and the third air pipe, the third air pipe and the three-way air pipe are connected end to end and are connected to the second through pipe. The third air pipe is provided with a one-way valve and a flow meter, the air inlet is connected to a compressed air pipeline, and the air outlet is connected to the outside air.
[0010] Through the above further scheme, when the two-position three-way solenoid valve is energized, compressed gas enters from the air inlet, enters the second through pipe through the third air pipe, and then is ejected outward from the flue gas sampling probe through the first through pipe. At the same time, the cylinder is pushed outward, and the cylinder is retracted when the solenoid valve is not energized.
[0011] Furthermore, it also includes a chimney, and the chimney is provided with an opening adapted to the first through pipe.
[0012] Through the above further solution, the first through-tube is located at the opening, so that the smoke sampling probe is located in the chimney, and the opening is adapted to the first through-tube, which can prevent the smoke in the chimney from flowing to the outside.
[0013] Furthermore, a through opening adapted to the baffle is provided on the chimney at the lower side of the opening.
[0014] Through the above further solution, the opening enables the baffle to enter the chimney. When the flue gas sampling probe is cleaned, the baffle enters the chimney to avoid affecting other sensors during cleaning.
[0015] Furthermore, a brush is provided on the through opening.
[0016] The above further solution can prevent debris from entering the chimney along with the baffle and affecting other detection devices, and can also reduce the flow of the chimney through the opening and the outside world.
[0017] Furthermore, the cylinder output direction is parallel to the axial direction of the flue gas sampling probe.
[0018] Through the above further solution, when the cylinder drives the baffle to move, the baffle can accurately pass through the opening to below the smoke sampling probe.
[0019] Furthermore, the baffle is L-shaped, one side of the baffle is parallel to the cylinder output direction, and the other side is fixedly connected to the cylinder output shaft, and a plurality of circular holes are provided on the side where the baffle is connected to the cylinder output shaft.
[0020] Through the above further solution, the circular holes are evenly arranged horizontally.
[0021] To sum up, the boiler flue gas sampling probe cleaning device provided by the utility model has the following technical effects: through compressed air backblowing, dust and other debris on the flue gas detection probe can be cleaned at any time without disassembling the detection device, and at the same time, the baffle pushed out by the cylinder effectively avoids the impact on other detection devices during cleaning, solving the problem of inaccurate detection caused by dust and other debris on the flue gas detection device, as well as the difficulty and untimely cleaning. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.
[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0024] Figure 2 For the utility model Figure 1 A schematic diagram of the partially enlarged structure at center A;
[0025] Figure 3 For the utility model Figure 1 A schematic diagram of the partially enlarged structure at B in the middle;
[0026] Figure 4 This is a schematic diagram of the connection structure between the bracket and the flange of the utility model;
[0027] Figure 5 This is a schematic diagram of the connection structure between the bracket and the cylinder of the utility model.
[0028] In the figure: 1. flue gas sampling probe; 11. first through pipe; 2. flue gas detector; 21. second through pipe; 3. bracket; 4. blocking mechanism; 41. blocking piece; 411. circular hole; 42. cylinder; 421. first air pipe; 422. second air pipe; 5. control mechanism; 51. two-position three-way solenoid valve; 511. working air port; 512. air inlet; 513. air outlet; 52. three-way air pipe; 53. third air pipe; 54. one-way valve; 55. flow meter; 6. compressed air pipeline; 7. chimney; 71. opening; 72. through port; 721. brush. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0032] Embodiment 1:
[0033] refer to Figure 1 As shown, a boiler flue gas sampling probe cleaning device includes a chimney 7, an opening 71 is provided on the chimney 7, a first through pipe 11 is connected to the opening 71, a flue gas sampling probe 1 is fixedly connected to the first through pipe 11, the flue gas sampling probe 1 is located in the chimney 7, the first through pipe 11 is fixedly connected to the flue gas detector 2 through the second through pipe 21, the first through pipe 11 and the second through pipe 21 are fixedly connected through a flange, the flue gas sampled by the flue gas sampling probe 1 enters the flue gas detector 2 through the first through pipe 11 and the second through pipe 21, and the smoke detector 2 detects the smoke.
[0034] refer to Figure 1 and Figure 2As shown, the second through pipe 21 is connected to the third air pipe 53, and the third air pipe 53 is provided with a one-way valve 54 and a flow meter 55. The third air pipe 53 is connected to the working air port 511 on the two-position three-way solenoid valve 51 through the three-way air pipe 52, the air inlet 512 of the two-position three-way solenoid valve 51 is connected to the compressed air pipeline 6, and the air outlet 513 of the two-position three-way solenoid valve 51 is connected to the outside air. When the two-position three-way solenoid valve 51 is energized, compressed gas enters from the air inlet 512, enters the second through pipe 21 through the third air pipe 53, and then is sprayed out from the flue gas sampling probe 1 through the first through pipe 11, thereby completing the cleaning of the flue gas sampling probe 1.
[0035] In this embodiment, the flow meter 55 is electrically connected to the PLC controller and the alarm indicator light in the central control room. When the solenoid valve is opened, if the reading of the flow meter 55 is lower than a certain threshold, it means that the flue gas sampling probe 1 is blocked and cannot be cleaned by backblowing with compressed gas. The PLC controller controls the alarm indicator light in the central control room to flash, reminding the operator to clean it in time.
[0036] refer to Figure 1 and Figure 3 As shown, a through hole 72 is provided on the chimney 7 at the lower side of the opening 71 , and a brush 721 is provided on the through hole 72 .
[0037] refer to Figure 1-Figure 5 As shown, a bracket 3 is provided on the second through pipe 21, a cylinder 42 is fixedly connected to the bracket 3, a baffle 41 is fixedly installed on the output shaft of the cylinder 42, a first air pipe 421 and a second air pipe 422 are respectively provided on the front and rear ends of the cylinder 42, the first air pipe 421 and the second air pipe 422 are connected with the three-way air pipe 52, and when the two-position three-way solenoid valve 51 is energized, compressed gas enters from the air inlet 512, passes through the first air pipe 421 and the second air pipe 422, and thus the cylinder 42 is pushed outward, driving the baffle 41 to move through the through port 72 to the bottom of the flue gas sampling probe 1. When the flue gas sampling probe 1 is cleaned, the baffle 41 enters the chimney 7 to avoid affecting other sensors during cleaning.
[0038] In this embodiment, in actual production, a plurality of sensors (such as temperature, pressure and flow sensors, etc.) are usually installed on the chimney 7. Due to the space limitation of the chimney 7, the installation positions of these sensors are usually close to each other. Therefore, when the compressed gas cleans the flue gas sampling probe 1, it may cause abnormal fluctuations in the detection data of other sensors. The baffle 41 is used to block it to avoid affecting other sensors during cleaning.
[0039] In this embodiment, the opening 71 is matched with the first through pipe 11 , so as to prevent the smoke in the chimney 7 from flowing to the outside, and the axial direction of the smoke sampling probe 1 is perpendicular to the axial direction of the chimney 7 .
[0040] In this embodiment, the installation direction of the brush 721 is perpendicular to the plane of the baffle 41, and the bristles are in direct contact with the plane of the baffle 41. The brush 721 on the opening 72 can prevent debris from entering the chimney 7 along with the baffle 41 and affecting other detection devices, and can also reduce the circulation between the chimney 7 and the outside world through the opening 72.
[0041] In this embodiment, the output direction of the cylinder 42 is parallel to the axial direction of the smoke sampling probe 1 , so that when the cylinder 42 drives the baffle 41 to move, the baffle 41 can accurately pass through the opening 72 to the bottom of the smoke sampling probe 1 .
[0042] Among them, the baffle 41 is L-shaped, one side of the baffle 41 is parallel to the output direction of the cylinder 42, and the other side is fixedly connected to the output shaft of the cylinder 42. A plurality of circular holes 411 are provided on the connection side of the baffle 41 and the output shaft of the cylinder 42. The circular holes 411 are evenly arranged horizontally. The circular holes 411 are directly the same as the diameter of the output shaft of the cylinder 42. The number of holes is an odd number. During installation, the output shaft of the cylinder 42 is connected to the circular hole 411 located in the center.
[0043] Among them, the bracket 3 is fixedly connected to the flange on the second through pipe 21, the upper part of the bracket 3 is semicircular, and the arc part has two mounting holes, which correspond to the mounting holes of the flanges of the first through pipe 11 and the second through pipe 21. The bracket 3 is connected to the flange through bolts and nuts, and the lower part of the bracket 3 is rectangular, and the rectangular part has four mounting holes, which correspond to the mounting holes on the cylinder 42. The bracket 3 is connected to the cylinder 42 through bolts.
[0044] It should be noted that the length of the air pipe between the two-position three-way solenoid valve 51 and the cylinder 42 is shorter than the length of the air pipe between the solenoid valve and the flue gas sampling probe 1 , and the baffle 41 can move to the bottom of the flue gas sampling probe 1 before the compressed air is ejected from the flue gas sampling probe 1 .
[0045] The specific implementation process of this embodiment is as follows:
[0046] When the two-position three-way solenoid valve 51 is energized, compressed gas enters from the air inlet 512, enters the second through pipe 21 through the third air pipe 53, and is sprayed toward the flue gas sampling probe 1. At the same time, the compressed gas passes through the first air pipe 421 and the second air pipe 422, thereby pushing the cylinder 42 outward, driving the baffle 41 to move. Since the air pipe length between the two-position three-way solenoid valve 51 and the cylinder 42 is shorter than the air pipe length between the solenoid valve and the flue gas sampling probe 1, the baffle 41 can move to the bottom of the flue gas sampling probe 1 before the compressed air is sprayed out from the flue gas sampling probe 1. After the high-pressure gas is sprayed out from the flue gas sampling probe 1, the cleaning of the flue gas sampling probe 1 is completed. At this time, the baffle 41 is located below the flue gas sampling probe 1, isolating the flue gas sampling probe 1 from other sensors below to avoid affecting other sensors during cleaning.
[0047] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A boiler flue gas sampling probe cleaning device, comprising a flue gas sampling probe (1), wherein one side of the flue gas sampling probe (1) is fixedly connected to a first through pipe (11), wherein the first through pipe (11) is fixedly connected to a flue gas detector (2) via a second through pipe (21), wherein the first through pipe (11) is fixedly connected to the second through pipe (21), and wherein: The second through pipe (21) is provided with a bracket (3), the bracket (3) is fixedly connected with a baffle mechanism (4), the baffle mechanism (4) is connected with a control mechanism (5), the baffle mechanism (4) comprises a baffle plate (41) and a cylinder (42), the cylinder (42) is fixedly mounted on the bracket (3), the output shaft of the cylinder (42) is fixedly connected with the baffle plate (41), the front end and the rear end of the cylinder (42) are respectively provided with a first air pipe (421) and a second air pipe (422), the first air pipe (421) and the second air pipe (422) are connected with the control mechanism (5), the control mechanism (5) comprises a two-position three-way solenoid valve (51), a three-way air pipe (52), a third air pipe ( The two-position three-way solenoid valve (51) is provided with a working air port (511), an air inlet (512) and an air outlet (513); the working air port (511) is communicated with a three-way air pipe (52); the three-way air pipe (52) is respectively connected with a first air pipe (421), a second air pipe (422) and a third air pipe (53); the third air pipe (53) and the three-way air pipe (52) are connected end to end and communicate with the second through pipe (21); the third air pipe (53) is provided with a one-way valve (54) and a flow meter (55); the air inlet (512) is communicated with a compressed air pipeline (6); and the air outlet (513) is communicated with the outside air.
2. A boiler flue gas sampling probe cleaning device according to claim 1, characterized in that: It also comprises a chimney (7), wherein the chimney (7) is provided with an opening (71) adapted to the first through pipe (11).
3. A boiler flue gas sampling probe cleaning device according to claim 2, characterized in that: The chimney (7) is provided with a through opening (72) matching with the baffle (41) at the lower side of the opening (71).
4. A boiler flue gas sampling probe cleaning device according to claim 3, characterized in that: The through opening (72) is provided with a brush (721).
5. The boiler flue gas sampling probe cleaning device according to claim 1, characterized in that: The output direction of the cylinder (42) is parallel to the axial direction of the smoke sampling probe (1).
6. The boiler flue gas sampling probe cleaning device according to claim 1, characterized in that: The baffle (41) is L-shaped, one side of the baffle (41) is parallel to the output direction of the cylinder (42), and the other side is fixedly connected to the output shaft of the cylinder (42), and a plurality of circular holes (411) are provided on the side where the baffle (41) is connected to the output shaft of the cylinder (42).