Cleaning device of matrix type air supply quantity measuring device

Abstract

The utility model relates to the technical field of deashing devices, in particular to a cleaning device of a matrix type air supply quantity measuring device, which comprises a rapping mechanism and an air supply mechanism, the rapping mechanism comprises a barrel, a striking rod, a handle and a striking head, the handle and the striking head are connected to two ends of the striking rod, and a mounting hole is formed in the side wall of a secondary air pipe and is coplanar with a supporting rod. The cylinder penetrates through the mounting hole and is obliquely mounted and fixed on the supporting rod, a sealing cover is arranged at the other end of the cylinder, the striking rod is slidably connected in the cylinder, and the striking head is close to the direction of the supporting rod; the air supply mechanism comprises an air supply fan, an air inlet nozzle and an air inlet pipe with a one-way valve, the air inlet nozzle is installed on the barrel, an air inlet hole is coaxially formed in the joint of the supporting rod and the barrel, an air outlet hole is formed in the joint of the supporting rod and the measuring device, the two ends of the air inlet pipe are connected with the supporting rod and the measuring device, and the air direction of the one-way valve faces the measuring device. By implementing the scheme, accumulated dust cleaning of the measuring device can be completed through rapid rapping and purging, and the accuracy of data measured by the measuring device is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of dust removal devices, specifically to a cleaning device for a matrix-type air volume measurement device. Background Technology

[0002] During power plant operation, the boiler secondary air supply volume is a critical parameter that must be accurately measured; otherwise, inaccurate air supply control will affect combustion efficiency and even cause environmental pollution. The air supply volume measuring device is installed inside the secondary air duct. Since the air delivered by the blower usually contains dust and other impurities, the measuring device is prone to ash accumulation and blockage after prolonged operation, severely affecting the accuracy of the air supply volume measurement. Typically, compressed air jetting is used to purge the sampling pipeline of the measuring device to clear the blockage. Some boiler secondary air supply volume measuring devices use a reverse-wind compensation matrix measuring device. This device has a vertical rod fixed to a support rod in the middle and has ten sampling holes equipped with a compensation anti-clogging probe. Theoretically, this design can effectively prevent ash accumulation and blockage during air volume measurement. However, in actual operation, due to the high dust content in the air supply system, this device has not completely solved the ash accumulation problem. Due to the characteristics of matrix measuring devices, compressed air enters from the top. Because the measuring device has many branch pipes, when using a purging method for dust removal, the purging pressure weakens and disperses after the airflow passes through the measuring device, making it impossible to completely remove accumulated dust, especially in the branch pipes. Therefore, dust accumulation and blockage will again affect the measurement in the short term, leading to deviations in airflow control, severely impacting combustion efficiency. Insufficient airflow can also cause incomplete combustion, resulting in environmental pollution.

[0003] To address the shortcomings of existing technologies, there is an urgent need for a cleaning device for matrix-type air volume measurement devices that can efficiently clean the accumulated dust from the measurement device, ensure the accuracy of the measurement data, and avoid environmental pollution problems. Utility Model Content

[0004] The present invention aims to provide a cleaning device for a matrix-type air volume measuring device, which can efficiently clean the dust accumulated in the measuring device, thereby ensuring the accuracy of the measuring data.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cleaning device for a matrix-type air volume measurement device includes a rapping mechanism and an air supply mechanism. The rapping mechanism includes a cylinder, a striking rod, and handles and striking heads connected to both ends of the striking rod. A mounting hole is provided on the side wall of the secondary air duct, coplanar with a support rod. The cylinder passes through the mounting hole and is obliquely mounted and fixed to the support rod. A cap is provided at the other end of the cylinder. The striking rod passes through the cap and is slidably connected within the cylinder. The striking head is located close to the support rod. The air supply mechanism includes a fan, an air inlet nozzle, and an air inlet pipe with a one-way valve. The air inlet nozzle is mounted on the cylinder. An air inlet hole is coaxially provided at the connection between the support rod and the cylinder. An air outlet hole is provided at the connection between the support rod and the measuring device. Both ends of the air inlet pipe are connected to the support rod and the measuring device, respectively. The airflow direction of the one-way valve is towards the measuring device.

[0007] The principles and advantages of this scheme are:

[0008] This solution provides a device with excellent dust removal effect and high efficiency, and features a simple structure and convenient operation and maintenance. Based on actual production conditions, the inventors carefully analyzed the blockage of the measuring device by examining its environment and the structure of the secondary air duct. After long-term tracking and analysis, they discovered that the blockage was caused by the fact that the original compressed air purging device's air supply position was at the very end of the measuring device. After passing through the long path and numerous straight pipes of the measuring device, the compressed air's blowing force decreased significantly, failing to directly blow away the accumulated dust. This blockage in the measuring device's branch pipes affected the measurement data.

[0009] After analyzing and identifying the problem, the inventors considered using a mechanical structure for rapid ash removal. Taking into account manufacturing and maintenance costs, they designed this device. Through minor modifications to existing secondary air ducts, measuring devices, and support rods, combined with a rapping mechanism and an air supply mechanism, ash removal is achieved quickly. The periodic impacts of the rapping mechanism transmit vibrations to the measuring device, loosening the ash inside. Combined with compressed air from the air supply mechanism (compressed air is used to improve efficiency due to the long overall air supply path), dust is effectively removed. The device has a simple overall structure, is easy to maintain, and has high reliability. Solving the ash accumulation problem ensures accurate measurement data from the measuring device, which not only improves the accuracy of the measurement data and ensures combustion efficiency but also reduces environmental pollution in the long run, achieving energy conservation and emission reduction.

[0010] Preferably, as an improvement, an impact-receiving cylinder is provided inside the connection between the cylinder body and the support rod. Several air holes are opened on the cylinder wall of the impact-receiving cylinder, and the impact-receiving cylinder is coaxial with the air inlet.

[0011] Since the impacted cylinder and the impactor head will stick together during the impact, the air supply channel will be partially blocked, which will affect the air intake effect of the air supply mechanism. Therefore, air holes are opened on the inner wall of the impacted cylinder to ensure smooth air supply, so that the rapping and air supply can be carried out simultaneously and efficiently, reducing energy consumption and improving dust removal efficiency.

[0012] Preferably, as an improvement, it includes at least three cylindrical sections, which are detachably connected.

[0013] Because the overall cylinder is too long, installation is very troublesome. Therefore, a multi-section cylinder design enhances the flexibility and adaptability of the device. For installers and maintenance personnel, the segmented design effectively reduces labor intensity, shortens working time, and improves work efficiency. In addition, the multi-section cylinder facilitates storage and transportation, reduces maintenance costs, and further enhances the economic efficiency and practicality of the device.

[0014] Preferably, as an improvement, the one-way valve is located at the connection between the air inlet pipe and the measuring device.

[0015] The original measuring device had no holes in its inner wall. Holes were added to enhance the dust removal effect. To avoid affecting the measurement accuracy of the measuring device, a one-way valve was placed at the end of the connection between the air inlet pipe and the measuring device. At this time, the one-way valve acts as a patch when the measuring device is working. The inner wall of the measuring device is flush with the one-way valve, filling in the hole. In this way, the impact on the measuring device is almost zero.

[0016] Preferably, as an improvement, it includes at least two air inlet nozzles, which are symmetrically mounted on the cover.

[0017] Although the single-sided air inlet nozzle has no problem supplying air, in actual use, the long duct causes uneven airflow distribution and vortices, resulting in a less than ideal overall dust removal effect. To further improve the dust removal effect, the air intake volume is increased by installing two air inlet nozzles symmetrically on the cover. The symmetrical design can effectively prevent the formation of vortices, ensure uniform airflow distribution, thereby improving air supply efficiency and enhancing the dust removal effect.

[0018] Preferably, as an improvement, the striking rod is provided with support wheels at 1 / 3 and 2 / 3 of its length. The support wheels are triangular in shape, with a bearing in the middle of the support wheel. The bearing is coaxially fixed to the striking rod, and pulleys are provided at the corners of the support wheels. The pulleys are slidably connected to the inner wall of the cylinder.

[0019] Because the striking rod is approximately 10 meters long, an excessively long rod is prone to bending and deformation, causing direct friction with the cylinder wall. This not only reduces the lifespan of the device but also generates high-frequency, sharp friction noise, affecting the working environment. Therefore, support wheels are installed at 1 / 3 and 2 / 3 of the length of the striking rod. These wheels provide support, preventing the striking rod from bending and deforming and directly contacting the inner wall of the cylinder. They also effectively reduce friction, making operation easier, reducing labor intensity, improving the stability of the device's operation, extending its service life, and ensuring a quiet and comfortable working environment.

[0020] Preferably, as an improvement, the support rod is provided with blockages at both ends, and the main air supply line is formed between the two blockages, with one blockage close to the air inlet and the other blockage close to the air outlet.

[0021] To achieve optimal cleaning performance, the striking point of the rod is close to the connection between the support rod and the measuring device. At this point, there is still a distance between the connection and the wall of the secondary air duct. This section of the duct from the wall to the connection is useless for air supply and will affect air supply efficiency and increase energy consumption. The same applies to the other end. Therefore, in order to make the main air supply line shorter and more efficient, the air supply line was deliberately shortened during the design process to reduce energy loss and further improve the dust removal effect and overall operating efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an embodiment of the present utility model.

[0023] Figure 2 This is a side view of an embodiment of the present invention.

[0024] Figure 3 for Figure 1 View A.

[0025] Figure 4 for Figure 1 View B.

[0026] Figure 5 for Figure 4 AA sectional view.

[0027] Figure 6 for Figure 1 The C view.

[0028] Figure 7 This is a schematic diagram of vibration transmission according to an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of the air supply path according to an embodiment of the present utility model. Detailed Implementation

[0030] The following detailed description illustrates the specific implementation method:

[0031] The reference numerals in the accompanying drawings include: secondary air duct 1, support rod 2, measuring device 3, cleaning device 4, air inlet 201, air outlet 202, air supply duct 203, one-way valve 204, block 205, cover 206, cylinder 401, striking rod 402, striking head 403, handle 404, striking cylinder 405, nozzle 406, and support wheel 407.

[0032] The basic implementation examples are as follows: Figure 1-8 As shown:

[0033] As attached Figure 1 As shown, a cleaning device for a matrix-type air volume measurement device is provided. The cleaning device 4 includes a rapping mechanism and an air supply mechanism, and its overall side view is shown in the attached figure. Figure 2 As shown, the rapping mechanism includes a cylinder 401, a striking rod 402, and handles 404 and striking heads 403 connected to both ends of the striking rod 402. The secondary air duct 1 has mounting holes on its side wall, which are coplanar with the support rod 2. It includes at least three cylinder sections 401, which are connected by threads. The cylinder 401 is obliquely mounted and fixed to the support rod 2 through the mounting holes. A cap 206 is provided at the upper end of the cylinder 401, which is fixedly connected to the upper end of the cylinder 401. The striking rod 402 is slidably connected to the cylinder 401 through the cap 206. The striking head 403 is connected to the lower end of the striking rod 402. (See attached diagram.) Figure 3 As shown, the impact head 403 is cylindrical, and an impact-receiving cylinder 405 is provided inside the connection between the cylinder body 401 and the support rod 2. Several air holes are opened on the cylinder wall of the impact-receiving cylinder 405. The cross-section of the impact-receiving cylinder 405 is shown in the attached figure. Figure 3 As shown in the lower right corner, the impacted cylinder 405 is coaxial with the air inlet 201. The diameter of the impact head 403 is smaller than the inner diameter of the cylinder 401 but larger than the inner diameter of the impacted cylinder 405. The impacted cylinder 405 is welded to the support rod 2. (See attached image) Figure 4 As shown, the striking lever 402 is provided with support wheels 407 at 1 / 3 and 2 / 3 of its length, as shown in the attached figure. Figure 5 As shown, the support roller 407 is triangular in shape. A bearing is provided in the middle of the support roller 407, and the bearing is coaxially fixed on the striking rod 402. Pulleys are provided at the corners of the support roller 407, and the pulleys are slidably connected to the inner wall of the cylinder 401.

[0034] Because the pedestrian and equipment maintenance access road is approximately 10 meters away from the secondary air duct, the overall installation structure is as shown in the attached diagram. Figure 1As shown, the handle is located in the pedestrian walkway for easy operation and management. The cylinder 401 is approximately 10 meters long, making whole-length installation cumbersome. Therefore, a multi-section cylinder 401 design enhances the device's flexibility and adaptability. During rapping operations, the impacted cylinder 405 and the impactor 403 come into contact, partially obstructing the air supply channel and affecting the air intake effect. Therefore, air holes are provided on the inner wall of the impacted cylinder 405 to ensure smooth air supply, allowing rapping and air supply to be performed simultaneously efficiently, reducing energy consumption and improving dust removal efficiency. Because the impactor 402 is quite long (approximately 10 meters), it is very prone to bending and deformation, directly rubbing against the cylinder 401 wall, reducing the device's lifespan. This friction also produces a high-frequency, sharp friction sound, affecting the working environment. Therefore, support wheels 407 are provided at 1 / 3 and 2 / 3 of the length of the striking rod 402. On the one hand, they can provide support and prevent the striking rod 402 from bending and deforming and directly contacting the inner wall of the cylinder 401. On the other hand, they can effectively reduce friction, improve the stability of the device operation, reduce labor intensity, extend service life, and ensure a quiet and comfortable working environment.

[0035] The air supply mechanism includes a blower, two symmetrically arranged air inlet nozzles 406, and an air inlet pipe with a one-way valve 204, as shown in the attached diagram. Figure 6 As shown, the blower is existing equipment and is not drawn in the figure. Two air inlet nozzles 406 are installed on the cover of the cylinder 401. An air inlet hole 201 is coaxially opened at the connection between the support rod 2 and the cylinder 401. An air outlet hole is opened at the connection between the support rod 2 and the measuring device 3. The two ends of the air inlet pipe are respectively connected to the support rod 2 and the measuring device 3. A one-way valve 204 is installed at the connection between the air inlet pipe and the measuring device 3, and the airflow direction of the one-way valve 204 is towards the measuring device 3. The two ends of the support rod 2 are provided with blocking blocks 205, and the positions of the blocking blocks 205 are shown in the attached figure. Figure 8 As shown, the main air supply line is formed between the two blocks 205. One block 205 is close to the air inlet 201, and the other block 205 is close to the air outlet of the rightmost air inlet pipe.

[0036] To ensure sufficient air intake, two air inlet nozzles 406 are designed. These, combined with high-velocity, high-pressure compressed air, guarantee overall air supply efficiency. The symmetrical design of the two nozzles 406 effectively prevents vortex formation, ensuring uniform airflow distribution, thereby improving air supply efficiency and enhancing dust removal. Since the cylinder's cover is located in the personnel maintenance passage, installing the air inlet nozzles 406 on the cover of the cylinder 401 facilitates maintenance and management. Because the measuring device 3 requires dust removal approximately every six months, the air supply device does not need to be fixed, avoiding unnecessary resource waste. Simply move the blower to the vicinity of the air inlet nozzles when dust removal is required, and connect the blower and nozzles with pipes to begin air supply. A one-way valve 204 is included to avoid affecting the normal operation of the measuring device 3. Furthermore, to shorten the main air supply line and increase efficiency, the air supply line was intentionally shortened during the design phase. A blocking block 205 is installed on the support rod 2 to reduce energy loss.

[0037] The specific implementation method is as follows:

[0038] First, install and position the device. Then, modify the side wall of the secondary air duct 1 and the support rod 2. Make openings in the upper part of the side wall of the secondary air duct 1 and the support rod 2 corresponding to the positions of the mounting cylinder 401, as per the attached... Figure 8 The block 205 is installed inside the support rod 2 at the indicated position. The measuring device 3 and the support rod 2 are welded together with the air supply pipe 203 equipped with a one-way valve 204. The impacted cylinder 405 is coaxially aligned with the opening of the support rod 2. The impacted cylinder 405 is welded to the support rod 2. Then, the first section of the cylinder 401 is passed through the hole in the side wall of the secondary air pipe 1 and coaxially aligned with the impacted cylinder 405 before being welded to the support rod 2. This completes the installation and fixation of the first section of the cylinder 401 and the impacted cylinder 405. Then, the remaining two sections of the cylinder 401 are installed in place by threading. The cover is slidably connected to the impact rod 402. One end of the impact head 403 is aligned with the cylinder 401, and the handle 404 is grasped to install the impact rod 402 in place. The cover is fixed to the upper end of the cylinder 401. The air supply equipment is connected and tested to complete the installation.

[0039] When cleaning accumulated dust, first grasp the handle 404 and lift the striking rod 402 to move the striking head 403 away from the impact cylinder 405. Continue lifting for a distance and then push the striking rod 402 forcefully to make the striking head 403 strike the impact cylinder 405 and generate vibration. The vibration is transmitted to the measuring device 3 through the support rod 2. The vibration path is shown in the attached figure. Figure 7 As shown, after repeated vibrations several times, the air supply fan is turned on, blowing compressed air through the cylinder 401 into the support rod 2, and then through the air supply pipe 203 connected to the support rod 2 into the measuring device 3. The air supply path is shown in the attached figure. Figure 8 As shown, continue to hold the handle 404 and vibrate it to loosen the accumulated dust. Combined with the air supply, the dust cleaning is completed quickly.

[0040] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A cleaning device for a matrix-type air volume measurement device, characterized in that: The device includes a rapping mechanism and an air supply mechanism. The rapping mechanism includes a cylinder, a striking rod, and handles and striking heads connected to both ends of the striking rod. The side wall of the secondary air duct has a mounting hole, which is coplanar with the support rod. The cylinder passes through the mounting hole and is obliquely installed and fixed on the support rod. The other end of the cylinder has a cap, and the striking rod passes through the cap and is slidably connected in the cylinder. The striking head is located close to the support rod. The air supply mechanism includes a fan, an air inlet nozzle, and an air inlet pipe with a one-way valve. The air inlet nozzle is installed on the cylinder. An air inlet hole is coaxially opened at the connection between the support rod and the cylinder. An air outlet hole is opened at the connection between the support rod and the measuring device. The two ends of the air inlet pipe are respectively connected to the support rod and the measuring device. The airflow direction of the one-way valve is towards the measuring device.

2. The cleaning device of the matrix-type air volume measuring device according to claim 1, characterized in that: The interior of the cylinder where it connects to the support rod is provided with an impact-receiving cylinder. Several air holes are opened on the cylinder wall of the impact-receiving cylinder, and the impact-receiving cylinder is coaxial with the air inlet.

3. The cleaning device for a matrix-type air volume measuring device according to claim 2, characterized in that: It consists of at least three cylindrical sections, which are detachably connected.

4. The cleaning device for a matrix-type air volume measuring device according to claim 3, characterized in that: The one-way valve is located at the connection between the air inlet pipe and the measuring device.

5. The cleaning device for a matrix-type air volume measuring device according to claim 4, characterized in that: It includes at least two air inlet nozzles, which are symmetrically mounted on the cover.

6. The cleaning device for a matrix-type air volume measuring device according to claim 5, characterized in that: The striking rod is equipped with support wheels at 1 / 3 and 2 / 3 of its length. The support wheels are triangular in shape and have a bearing in the middle. The bearing is coaxially fixed to the striking rod. Each corner of the support wheel is equipped with a pulley, which is slidably connected to the inner wall of the cylinder.

7. The cleaning device for a matrix-type air volume measuring device according to claim 6, characterized in that: The support rod has two end blocks inside, and the main air supply line is formed between the two end blocks. One end block is close to the air inlet, and the other end block is close to the air outlet.

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