Low-pressure-loss wear-resistant wind speed measuring device

Abstract

The utility model discloses a low-pressure-loss wear-resistant wind speed measuring device, which relates to the technical field of wind speed measurement, and comprises a measuring assembly and a shunting piece, the measuring assembly comprises an air pipe and an eddy current detection mechanism, and the eddy current detection mechanism is connected with the air pipe and is positioned between an air inlet and an air outlet of the air pipe. The flow dividing piece is arranged in the air pipe and located between the air inlet and the eddy current detection mechanism, the flow dividing piece comprises a first flow dividing plate and a second flow dividing plate which are connected with each other and form an included angle, the thickness direction of the first flow dividing plate is parallel to the center axis of the air pipe, and the second flow dividing plate is located on the side, opposite to the air inlet, of the first flow dividing plate. The air flow in the air pipe sequentially passes through the first splitter plate and the second splitter plate to form vortex, pulverized coal is not prone to being accumulated in the air pipe, the accumulated pulverized coal can be taken out through the vortex even if the pulverized coal is accumulated, the measurement precision of the vortex detection mechanism on the pulverized coal cannot be disturbed, and meanwhile the risk of spontaneous combustion of the pulverized coal in the air pipe is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wind speed measurement technology, specifically to a low-pressure-loss, wear-resistant wind speed measuring device. Background Technology

[0002] Pulverized coal refers to coal with a particle size of less than 0.5 mm. It is the most commonly used additive in cast iron molding sand. Pulverized coal can be introduced into the boiler through air ducts to provide fuel for combustion. The conveying speed of pulverized coal in the air ducts directly affects the uniformity of coal delivery, the stability of the furnace operating conditions, and the boiler combustion efficiency.

[0003] The prior art disclosed in CN209416427U is a vortex air volume meter for measuring pulverized coal air, including a connecting pipe and T-bolts. Flanges are installed at both ends of the connecting pipe, and a wear-resistant ceramic layer is installed on the inner wall of the connecting pipe. A joint is connected to the center of the top pipe of the connecting pipe. A flow probe and a pressure sensor are installed in the joint. An upper disc is provided at the top of the joint. The upper disc is connected to the joint by four T-bolts. A support column is installed at the center of the top of the upper disc, and a control box is installed at one end of the support column.

[0004] However, the existing pulverized coal duct still has shortcomings. For example, when the power generation needs to be adjusted in response to national policies, resulting in a lower conveying speed of the pulverized coal duct, pulverized coal is prone to accumulate inside the duct. This not only interferes with the measurement accuracy of pulverized coal, but also poses a risk of spontaneous combustion in high-temperature environments. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a low-pressure-loss, wear-resistant wind speed measuring device. This addresses the technical problem in the prior art where, when the conveying speed of pulverized coal ducts is low, pulverized coal tends to accumulate inside the duct, which not only interferes with the measurement accuracy of pulverized coal but also poses a risk of spontaneous combustion in high-temperature environments.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a low-pressure-loss, wear-resistant wind speed measuring device, comprising:

[0008] A measuring component includes a duct and an eddy current detection mechanism, the eddy current detection mechanism being connected to the duct and located between the duct's air inlet and outlet; and

[0009] A flow divider is disposed inside the duct and located between the air inlet and the vortex detection mechanism. The flow divider includes a first flow divider plate and a second flow divider plate that are connected to each other and arranged at an angle. The thickness direction of the first flow divider plate is parallel to the central axis of the duct, and the second flow divider plate is located on the side of the first flow divider plate facing away from the air inlet.

[0010] In some embodiments, the second diverter plate is perpendicular to the first diverter plate, and the thickness direction of the second diverter plate is perpendicular to the central axis of the duct.

[0011] In some embodiments, one end of the first diverter plate is connected to the inner wall of the duct, and the other end of the first diverter plate forms a notch with the inner wall of the duct.

[0012] In some embodiments, the two ends of the second diverter plate are connected to the opposite inner walls of the duct, and the two sides of the first diverter plate are symmetrically arranged with respect to the second diverter plate.

[0013] In some embodiments, the eddy current detection mechanism includes an eddy current detector, a transmitter, and a handle. The eddy current detector is located inside the duct, and the handle is located on the outer wall of the duct. The two ends of the handle are respectively connected to the eddy current detector and the transmitter.

[0014] In some embodiments, the eddy current detection mechanism further includes an adjusting nut, the eddy current detector is threadedly connected to the handle, and the adjusting nut is threadedly sleeved on the eddy current detector.

[0015] In some embodiments, the eddy current detection mechanism further includes a probe seat and a graphite gasket, the probe seat being disposed on the outer wall of the duct, and the graphite gasket being disposed between the probe seat and the eddy current detector.

[0016] In some embodiments, the periphery of the probe holder is detachably connected to the outer wall of the duct via multiple screws, and the periphery of the graphite gasket is detachably connected to the eddy current detector via multiple screws.

[0017] In some embodiments, the number of the diverting components is multiple, and the multiple diverting components are spaced apart along the length extension direction of the duct, and the multiple second diverting plates all have the same orientation.

[0018] In some embodiments, the outer wall of the duct is provided with a lifting ring, and the lifting ring itself has a lifting through hole.

[0019] Compared with the prior art, the low-pressure-loss wear-resistant wind speed measuring device provided by this utility model has an air duct that can be used to connect a blower and a pulverized coal storage frame. The blower continuously blows air, which blows the pulverized coal in the pulverized coal storage frame into the air inlet of the air duct. The airflow acts on the first and second diverter plates in sequence. Since the first and second diverter plates are set at an angle and the thickness direction of the first diverter plate is parallel to the central axis of the air duct, and the second diverter plate is located on the side of the first diverter plate facing away from the air inlet, this structural arrangement allows the airflow to form a vortex after passing through the first and second diverter plates in sequence. Pulverized coal is not easy to accumulate inside the air duct. Even when the airflow velocity is low, the accumulated pulverized coal can be carried out by the vortex, which will not interfere with the measurement accuracy of the vortex detection mechanism for pulverized coal. At the same time, it also reduces the risk of spontaneous combustion of pulverized coal inside the air duct. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the wind speed measuring device provided in this embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the diversion component provided in this embodiment of the utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] To address the technical problem in existing pulverized coal ducts where coal dust tends to accumulate inside at low conveying speeds, interfering with measurement accuracy and posing a risk of spontaneous combustion under high temperatures, this invention provides a low-pressure-loss, wear-resistant wind speed measuring device. This device can create eddies within the duct at low conveying speeds, preventing coal dust accumulation and ensuring accurate measurement by the eddy current detection mechanism. It also reduces the risk of spontaneous combustion of coal dust inside the duct.

[0024] Please see Figure 1 and Figure 2 , Figure 1This is a schematic diagram of the structure of a low-pressure-loss wear-resistant wind speed measuring device according to an embodiment of the present invention. The low-pressure-loss wear-resistant wind speed measuring device includes a measuring component 1 and a flow divider 2. The measuring component 1 includes a duct 11 and an eddy current detection mechanism 12. The eddy current detection mechanism 12 is connected to the duct 11 and located between the air inlet 111 and the air outlet 112 of the duct 11. The flow divider 2 is disposed inside the duct 11 and located between the air inlet 111 and the eddy current detection mechanism 12. The flow divider 2 includes a first flow divider plate 21 and a second flow divider plate 22 that are connected and arranged at an angle. The thickness direction of the first flow divider plate 21 is parallel to the central axis of the duct 11, and the second flow divider plate 22 is located on the side of the first flow divider plate 21 that faces away from the air inlet 111.

[0025] In this embodiment, the air inlet 111 of the duct 11 can be used to connect the blower and the material frame containing pulverized coal. The material frame can be controlled to gradually release pulverized coal while the blower is started to blow air. The airflow mixes with the pulverized coal and blows towards the duct 11. The pulverized coal mixed airflow enters the interior of the duct 11 from the air inlet 111. The pulverized coal mixed airflow acts on the diverter 2. According to the Karman vortex street principle, when the pulverized coal mixed airflow passes through the diverter 2, it will be separated by the diverter 2 to form two vortices. The formed vortices will remix on the other side of the diverter 2 and the number of vortices generated will be detected by the vortex detection mechanism 12 fixed on the inner wall of the duct 11, forming a pulse signal. The pulse signal is converted into an electrical signal by the vortex detection mechanism 12 and output to the corresponding display device. The parameters of the pulverized coal mixed airflow are displayed through the display device. Because the coal powder mixed airflow can form a vortex after passing through the diverter 2, it is not easy for coal powder to accumulate inside the duct. Even if coal powder accumulates, it can be carried out by the vortex, which will not interfere with the measurement accuracy of the vortex detection mechanism for coal powder. At the same time, it also reduces the risk of spontaneous combustion of coal powder inside the duct.

[0026] In one embodiment, please refer to Figure 2 The second diverter plate 22 is perpendicular to the first diverter plate 21, and the thickness direction of the second diverter plate 22 is perpendicular to the central axis of the duct 11. In this embodiment, the second diverter plate 22 is arranged perpendicularly to the first diverter plate 21, so that the coal powder mixed airflow can form a stable vortex after acting on the second diverter plate 22 and the first diverter plate 21, which can more effectively carry out the residual coal powder.

[0027] In one embodiment, please refer to Figure 1 and Figure 2One end of the first diverter plate 21 is connected to the inner wall of the duct 11, and the other end of the first diverter plate 21 forms a gap 23 with the inner wall of the duct 11. In this embodiment, the length of the first diverter plate 21 is less than the length of the second diverter plate 22, so that the first diverter plate 21 forms a gap 23 with the inner wall of the duct 11. It can also be understood that the gap 23 is formed between the first diverter plate 21 and the second diverter plate 22. This structure allows the vortex formed when the coal powder mixed airflow blows toward the gap to have a large flow velocity at the bottom of the duct 11, which can quickly blow out the coal powder remaining at the bottom of the duct 11.

[0028] In one embodiment, please refer to Figure 2 The two ends of the second diverter plate 22 are connected to the opposite inner walls of the duct 11, and the two sides of the first diverter plate 21 are symmetrically arranged about the second diverter plate 22. In this embodiment, the two sides of the first diverter plate 21 are symmetrically arranged about the second diverter plate 22, so that the coal powder mixed airflow can form a symmetrical vortex after acting on the first diverter plate 21 and the second diverter plate 22 in sequence, which is beneficial to carry out the coal powder remaining on the inner wall of the duct.

[0029] In one embodiment, please refer to Figure 1 The eddy current detection mechanism 12 includes an eddy current detector 121, a transmitter 122, and a handle 123. The eddy current detector 121 is located inside the air duct 11, and the handle 123 is located on the outer wall of the air duct 11. The two ends of the handle 123 are connected to the eddy current detector and the transmitter, respectively. In this embodiment, the eddy current detector 121 is connected to the transmitter 122 via a data cable. The eddy current signal detected by the eddy current detector 121 is transmitted to the transmitter 122 via the data cable. The transmitter 122 organizes the received eddy current signal into readable data, which is displayed on the display panel of the transmitter 122 for reference by the operator.

[0030] In one embodiment, please refer to Figure 1 The eddy current detection mechanism 12 also includes an adjusting nut 124. The eddy current detector 121 is threadedly connected to a handle 123, and the adjusting nut 124 is threadedly fitted onto the eddy current detector 121. In this embodiment, the eddy current detector 121 is threadedly connected to the handle 123, allowing the eddy current detector 121 to rotate relative to the handle 123. This allows the eddy current detector 121 to move closer to or further away from the handle 123 via the thread, adjusting the space occupied by the wind speed measuring device to suit the current installation environment. The adjusting nut 124 can rotate to abut against the handle 123 to lock the eddy current detector 121. Furthermore, the handle 123 is hollow with openings at both ends to facilitate the threading of wires, allowing the two ends of the wires to connect the eddy current detector 121 and the transmitter 122.

[0031] In one embodiment, please refer to Figure 1The eddy current detection mechanism 12 also includes a probe holder 125 and a graphite gasket (not shown in the figure). The probe holder 125 is disposed on the outer wall of the duct 11, and the graphite gasket is disposed between the probe holder 125 and the eddy current detector 121. In this embodiment, the graphite gasket of the probe holder 125 is installed between the eddy current detector 121 and the probe holder 125, which can effectively seal the connection between the two and prevent the coal powder gas flow from leaking from the gap. This is crucial to ensuring the accuracy of the measurement by the eddy current detector 121, because any gas leakage may lead to deviation in the measurement data.

[0032] In one embodiment, please refer to Figure 1 The probe holder 125 is detachably connected to the outer wall of the duct 11 via multiple screws, and the graphite gasket is detachably connected to the eddy current detector 121 via multiple screws. In this embodiment, the probe holder 125 can be connected to the outer wall of the duct 11 via multiple screws, allowing for easy and quick assembly and disassembly of the probe holder 125 from the duct 11. The graphite gasket is detachably connected to the eddy current detector 121 via multiple screws, facilitating quick assembly and disassembly of the graphite gasket and the eddy current detector 121.

[0033] In one embodiment, please refer to Figure 1 The number of diverting components 2 is multiple, and these components are spaced apart along the length of the duct 11, with all the second diverting plates 22 facing the same direction. In this embodiment, if the duct 11 is long, multiple diverting components 2 can be arranged along it. The distance between adjacent diverting components 2 is set appropriately to avoid the influence of adjacent vortices, thus forming multiple vortices inside the duct 11 and preventing the accumulation of excessive coal dust inside the duct 11.

[0034] In one embodiment, please refer to Figure 1 The outer wall of the duct 11 is provided with lifting rings 113, each with a lifting through hole. In this embodiment, there are four lifting rings 113, arranged in pairs on both sides of the duct 11. The main purpose of the lifting rings 113 is to facilitate the lifting and handling of the equipment. When installing or dismantling the anemometer, the lifting rings 113 can serve as lifting points, allowing the entire anemometer to be lifted by a crane or other lifting equipment, thus facilitating its installation in a predetermined position or removal from the duct.

[0035] In one embodiment, please refer to Figure 1 The inner wall of the duct 11 is fitted with wear-resistant ceramic 114. During the high-speed flow of coal dust, the inner wall of the duct 11 will experience strong impact and wear. The wear-resistant ceramic, with its high hardness and wear resistance, can effectively reduce the wear of coal dust on the inner wall of the duct 11 and extend the service life of the duct 11.

[0036] To better understand this utility model, the following is combined with... Figures 1 to 2 The technical solution of this utility model is described in detail below:

[0037] The low-pressure-loss, wear-resistant wind speed measuring device provided by this utility model has an air duct 11 that can be used to connect a blower and a pulverized coal storage frame. The blower continuously blows air, which blows the pulverized coal in the pulverized coal storage frame into the air duct through the air inlet 111. The airflow acts on the first diverter plate 21 and the second diverter plate 22 in sequence. Since the first diverter plate 21 and the second diverter plate 22 are set at an angle and the thickness direction of the first diverter plate 21 is parallel to the central axis of the air duct 11, and the second diverter plate 22 is located on the side of the first diverter plate 21 away from the air inlet 111, this structural arrangement allows the airflow to form a vortex after passing through the first diverter plate 21 and the second diverter plate 22 in sequence. Pulverized coal is not easily accumulated inside the air duct 11. Even when the airflow velocity is low, the accumulated pulverized coal can be carried out by the vortex, which will not interfere with the measurement accuracy of the vortex detection mechanism for pulverized coal. At the same time, it also reduces the risk of spontaneous combustion of pulverized coal inside the air duct 11.

[0038] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A low pressure loss wear resistant wind speed measuring device, characterized in that, include: The measuring component includes a duct and an eddy current detection mechanism, the eddy current detection mechanism being connected to the duct and located between the air inlet and air outlet of the duct; and A flow divider is disposed inside the duct and located between the air inlet and the vortex detection mechanism. The flow divider includes a first flow divider plate and a second flow divider plate that are connected to each other and arranged at an angle. The thickness direction of the first flow divider plate is parallel to the central axis of the duct, and the second flow divider plate is located on the side of the first flow divider plate facing away from the air inlet.

2. The low pressure-loss wear-resistant wind speed measuring device according to claim 1, characterized in that, The second diverter plate is perpendicular to the first diverter plate, and the thickness direction of the second diverter plate is perpendicular to the central axis of the duct.

3. The low pressure-loss wear-resistant wind speed measuring device according to claim 2, characterized in that, One end of the first diverter plate is connected to the inner wall of the duct, and the other end of the first diverter plate forms a gap with the inner wall of the duct.

4. The low pressure-loss wear-resistant wind speed measuring device according to claim 3, characterized in that, The two ends of the second diverter plate are connected to the opposite inner walls of the duct, and the two sides of the first diverter plate are symmetrically arranged about the second diverter plate.

5. The low pressure-loss wear-resistant wind speed measuring device according to claim 1, characterized in that, The eddy current detection mechanism includes an eddy current detector, a transmitter, and a handle. The eddy current detector is located inside the duct, and the handle is located on the outer wall of the duct. The two ends of the handle are respectively connected to the eddy current detector and the transmitter.

6. The low pressure-loss wear-resistant wind speed measuring device according to claim 5, characterized in that, The eddy current detection mechanism also includes an adjusting nut, the eddy current detector is threadedly connected to the handle, and the adjusting nut is threadedly sleeved on the eddy current detector.

7. The low pressure-loss wear-resistant wind speed measuring device according to claim 5, characterized in that, The eddy current detection mechanism also includes a probe holder and a graphite gasket. The probe holder is located on the outer wall of the duct, and the graphite gasket is located between the probe holder and the eddy current detector.

8. The low pressure-loss wear-resistant wind speed measuring device according to claim 7, characterized in that, The probe holder is detachably connected to the outer wall of the duct via multiple screws, and the graphite gasket is detachably connected to the eddy current detector via multiple screws.

9. The low pressure-loss wear-resistant wind speed measuring device according to claim 1, characterized in that, The number of the diverting components is multiple, and the multiple diverting components are spaced apart along the length extension direction of the air duct, and the multiple second diverting plates all have the same orientation.

10. The low pressure-loss wear-resistant wind speed measuring device according to claim 1, characterized in that, The outer wall of the duct is provided with a lifting ring, and the lifting ring itself forms a lifting through hole.

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