Pulverized coal fineness detection device based on constant-speed sampling

Abstract

The utility model relates to the technical field of pulverized coal fineness detection, in particular to a pulverized coal fineness detection device based on constant-speed sampling, which comprises a pulverized coal pipeline, a pulverized coal sampling gun and a communicating pipe communicated with the pulverized coal pipeline, and the sampling end of the pulverized coal sampling gun extends into the communicating pipe; one end of the pulverized coal sampling gun outside the communicating pipe is communicated with a cyclone separator through a hose; the fixed plate is fixed on the outer wall of the pulverized coal pipeline; the fixed block is fixed on the pulverized coal sampling gun; the fixing block is in linear sliding connection with the fixing plate; the fixed block is fixedly connected with a driving shaft; the gate valve comprises a main body and a valve plate linearly sliding relative to the main body, the linear sliding direction of the valve plate is perpendicular to the linear sliding direction of the fixing block, and the main body is arranged on the communicating pipe; the device is simple in structure, the position of the pulverized coal sampling gun and the state of the valve can be automatically controlled, the fineness of pulverized coal can be automatically detected, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of coal powder fineness detection, and in particular to a coal powder fineness detection device based on isokinetic sampling. Background Technology

[0002] Utility model patent application number 201420864216.8 relates to an on-site coal powder sampling device capable of isokinetic sampling. It includes a flat-headed isokinetic coal powder sampling gun, a cyclone separator and a coal powder collection tank connected to the tail of the sampling gun, a support arm with a hole drilled at the lower end to pass through the differential pressure measuring tube at the tail of the sampling gun and clamp the outer wall of the sampling gun, and a pulley mounted on the upper end of the support arm that rolls on a support track. The support track is arranged parallel to the upper side of the sampling gun. The sampling end of the sampling gun is inserted into a graphite sealing packing, and a ball valve and a pipe seat are sequentially connected after the sealing packing. Due to the implementation of the above technical solution, this application can perform coal powder sampling according to the relevant provisions of the power standard "Performance Test of Coal Mill and Pulverizing System in Power Plants" DL / T467-2004, and the obtained coal powder sample can accurately reflect the fineness of the coal powder.

[0003] The following problems were found when using the above device: the valve needs to be manually closed when pushing the coal powder sampling gun to the sampling position, which is inconvenient for operation. At the same time, the above device cannot detect the fineness of coal powder, and other devices are required for detection, which increases the workload. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a coal powder fineness detection device based on isokinetic sampling. It has a simple structure, can automatically control the position of the coal powder sampling gun and the state of the valve, and can also automatically detect the fineness of coal powder, thereby improving the detection efficiency.

[0005] The present invention relates to a coal powder fineness detection device based on isokinetic sampling, comprising a coal powder pipeline, a coal powder sampling gun, and a connecting pipe connected to the coal powder pipeline. The sampling end of the coal powder sampling gun extends into the connecting pipe. The end of the coal powder sampling gun located outside the connecting pipe is connected to a cyclone separator via a flexible hose.

[0006] Also includes:

[0007] A fixing plate is fixed to the outer wall of the pulverized coal pipeline;

[0008] A fixing block is fixed to the coal powder sampling gun; the fixing block and the fixing plate are linearly slidably connected; a drive shaft is fixedly connected to the fixing block;

[0009] A gate valve includes a main body and a valve plate that slides linearly relative to the main body. The linear sliding direction of the valve plate is perpendicular to the linear sliding direction of the fixed block. The main body is mounted on a connecting pipe.

[0010] A connecting plate is connected to the valve plate; the connecting plate has a guide hole, which includes an inclined section and a straight section; the inclined section has an angle with the movement trajectory of the drive shaft, and the straight section is parallel to the movement trajectory of the drive shaft;

[0011] When no sampling is being performed, the drive shaft passes through the inclined section and the valve plate closes; when sampling is being performed, the drive shaft passes through the straight section and the valve plate slides linearly to the position where the coal powder sampling gun passes through.

[0012] It also includes a detection component, which is installed at the bottom of the cyclone separator.

[0013] As a preferred embodiment of this utility model, the detection component includes:

[0014] The discharge end of the cyclone separator passes through the testing box; and the cyclone separator inside the testing box is made of transparent material.

[0015] The detection assembly also includes a light source and a camera assembly, both of which are located inside the detection chamber; the light source and camera assembly are located on opposite sides of the cyclone separator.

[0016] As a preferred embodiment of this utility model, it also includes:

[0017] The power mechanism is fixed to the fixed plate; the power mechanism is used to drive the fixed block to move.

[0018] As a preferred embodiment of this utility model, it also includes:

[0019] Two flow rate sensors are located inside the pulverized coal pipeline and the pulverized coal sampling gun, respectively.

[0020] As a preferred embodiment of this utility model, it also includes:

[0021] The top of the collection pipe is connected to the discharge end of the cyclone separator.

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

[0023] A blower, the output end of which is connected to one end of the collection pipe;

[0024] The other end of the collection pipe is connected to the pulverized coal pipeline;

[0025] Among them, valve one is installed between the discharge end of the cyclone separator and the collection pipe; valve two is installed on the collection pipe.

[0026] As a preferred embodiment of this utility model, a bearing is fixed to the drive shaft; the outer wall of the bearing is in contact with the inner wall of the guide hole.

[0027] In a preferred embodiment of this utility model, the connecting plate and the gate valve plate are connected by two symmetrically arranged transition plates.

[0028] As a preferred embodiment of this utility model, a sealing element is provided between the connecting pipe and the coal powder sampling gun.

[0029] As a preferred embodiment of this utility model, the testing box is rotatably connected to a door.

[0030] Compared with the prior art, the beneficial effects of this utility model are as follows: This device solves the problem of inconvenience of manual operation by introducing a fixed block and a design that links the drive shaft with the gate valve, realizing the function of automatically opening the gate valve when the coal powder sampling gun is inserted into the coal powder pipeline, simplifying the operation steps; at the same time, this device integrates the detection component at the bottom of the cyclone separator, which can directly detect the fineness of coal powder during the sampling process, eliminating the need for additional devices, reducing workload, and ensuring the consistency and accuracy of the test results. This not only improves the ease of operation, but also enhances the automation level of the entire sampling process and the immediacy of data acquisition, thereby effectively improving the inconvenience caused by manually closing the valve and the increased workload caused by using additional detection devices mentioned in the background art. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 yes Figure 1 Enlarged view of part A in the middle;

[0033] Figure 3 yes Figure 1 The front view;

[0034] Figure 4 This is a cross-sectional view of the pulverized coal pipeline, pulverized coal sampling gun, connecting pipe, and gate valve before sampling.

[0035] Figure 5 yes Figure 1 Rear view;

[0036] Figure 6 This is a structural schematic diagram of the cyclone separator and detection components;

[0037] The following are labels in the attached diagram: 1. Pulverized coal pipeline; 2. Pulverized coal sampling gun; 3. Connecting pipe; 4. Flexible hose; 5. Cyclone separator; 6. Fixing plate; 7. Fixing block; 8. Drive shaft; 9. Gate valve; 10. Connecting plate; 11. Inclined section; 12. Straight section; 13. Detection assembly; 131. Detection box; 132. Light source; 133. Camera assembly; 14. Power mechanism; 15. Flow sensor; 16. Collection pipe; 17. Blower; 18. Valve 1; 19. Valve 2; 20. Transition plate; 21. Seal. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Example

[0042] Reference Figures 1-6 This embodiment provides a coal powder fineness detection device based on isokinetic sampling, including a coal powder pipeline 1, a coal powder sampling gun 2, and a connecting pipe 3 connected to the coal powder pipeline 1. The connecting pipe 3 is arranged in the radial direction of the coal powder pipeline 1, and the sampling end of the coal powder sampling gun 2 extends into the connecting pipe 3. One end of the coal powder sampling gun 2 located outside the connecting pipe 3 is connected to a cyclone separator 5 through a flexible hose 4.

[0043] Also includes:

[0044] Fixing plate 6 is fixed to the outer wall of pulverized coal pipeline 1;

[0045] Fixed block 7 is fixed to coal powder sampling gun 2; fixed block 7 is linearly slidably connected to the track on fixed plate 6; drive shaft 8 is fixedly connected to fixed block 7.

[0046] The gate valve 9 includes a main body and a valve plate that slides linearly relative to the main body. The linear sliding direction of the valve plate is perpendicular to the linear sliding direction of the fixed block 7. The main body is mounted on the connecting pipe 3.

[0047] The connecting plate 10 is connected to the valve plate; the connecting plate 10 has a guide hole, which includes an inclined section 11 and a straight section 12; the inclined section 11 has an angle with the moving trajectory of the drive shaft 8, and the straight section 12 is parallel to the moving trajectory of the drive shaft 8.

[0048] When no sampling is performed, the drive shaft 8 passes through the inclined section 11 and the valve plate is closed; when sampling is performed, the drive shaft 8 passes through the straight section 12 and the valve plate slides straight to the position where the sampling end of the coal powder sampling gun 2 passes.

[0049] It also includes a detection component 13, which is installed at the bottom of the cyclone separator 5;

[0050] The specific working process of this device is as follows: When no sample is taken, such as... Figure 2 As shown, when the gate valve 9 is closed, the drive shaft 8 passes through one end of the inclined section 11. The gate valve 9 is located between the coal powder pipeline 1 and the sampling end of the coal powder sampling gun 2, and there is a certain distance between the sampling end of the coal powder sampling gun 2 and the gate valve 9. The medium in the coal powder pipeline 1 cannot flow into the connecting pipe 3. When sampling is required, the fixed block 7 and the drive shaft 8 move closer to the coal powder pipeline 1 along the track on the fixed plate 6, thereby driving the coal powder sampling gun 2 to extend into the coal powder pipeline 1. Since the connecting plate 10 and the valve plate of the gate valve 9 can only move vertically, when the drive shaft 8 passes through the inclined section 11, there is an angle between the inclined section 11 and the movement trajectory of the drive shaft 8, causing the connecting plate 10 and the valve plate to move up and open the connecting pipe 3. After the gate valve 9 is opened, the external power is used to backflush the coal powder sampling gun 2 and the connecting pipe 3. Then, the shaft 8 is driven through the straight section 12. At this time, the movement trajectory of the shaft 8 coincides with the straight section 12, which will not affect the height of the valve plate and the connecting plate 10, keeping the gate valve 9 open. During the process of the shaft 8 passing through the straight section 12, the coal powder sampling gun 2 gradually extends into the coal powder pipeline 1. When it reaches the sampling position, the fixing block 7 stops. The external power is used to draw air into the cyclone separator 5, the hose 4, the coal powder sampling gun 2 and the connecting pipe 3. When the flow velocity in the coal powder sampling gun 2 and the coal powder pipeline 1 is consistent, sampling is performed. The coal powder particles and air flow along the sampling pipe and the hose 4 into the cyclone separator 5. The cyclone separator 5 performs gas-solid separation. The coal powder leaves the cyclone separator 5 from the output end of the cyclone separator 5. During the separation process, the fineness of the coal powder is detected by the detection component 13.

[0051] As a preferred embodiment of this utility model, refer to Figure 6 The detection component 13 includes:

[0052] The discharge end of the cyclone separator 5 passes through the test box 131; and the cyclone separator 5 inside the test box 131 is made of transparent material.

[0053] The detection assembly 13 also includes a light source 132 and a camera assembly 133, both of which are located inside the detection box 131; the light source 132 and the camera assembly 133 are located on both sides of the cyclone separator 5.

[0054] The specific working process of the detection component 13 is as follows: The part of the cyclone separator 5 inside the detection chamber 131 is made of transparent material, which allows light to pass through. The light source 132 is located inside the detection chamber 131 and is arranged on one side of the cyclone separator 5. When coal powder particles fall from the cyclone separator 5, the light emitted by the light source 132 will illuminate these particles. The camera component 133 is arranged on the other side of the cyclone separator 5, opposite to the light source 132. When the light source 132 illuminates the falling coal powder particles, the camera component 133 can capture the image formed by the shadow or reflected light of these particles. The collected image data is transmitted to an external processing system for analysis. Based on image processing technology, such as edge detection and morphological operations, the external processing system can identify the size information of each particle and then calculate the overall fineness distribution of the coal powder sample. Finally, based on the data obtained from the analysis, the external processing system can provide specific values ​​or distribution maps of the coal powder fineness to help staff understand the current quality status of the coal powder.

[0055] Without a power source, the fixed block 7 needs to be moved manually, which undoubtedly increases the labor intensity. As a preferred solution of this utility model, refer to Figure 5 It also includes:

[0056] The power mechanism 14 is fixed on the fixed plate 6. The power mechanism 14 is used to drive the fixed block 7 to move. The power mechanism 14 can be a cylinder, hydraulic cylinder or electric telescopic rod, etc. When the power mechanism 14 is activated, it drives the fixed block 7 and the drive shaft 8 to slide along the track.

[0057] As a preferred embodiment of this utility model, refer to Figures 3-4 It also includes:

[0058] Two flow rate sensors 15 are located inside the pulverized coal pipeline 1 and the pulverized coal sampling gun 2, respectively. When pulverized coal flows through these two locations, the flow rate sensors 15 can accurately measure the flow velocity of the pulverized coal in their respective areas. Based on the obtained pulverized coal flow velocity, the external control system can adjust the working parameters of the external power source to control the flow velocity in the pulverized coal sampling gun 2, making it as close as possible to the actual flow velocity in the pulverized coal pipeline 1, thereby ensuring the accuracy of sampling.

[0059] Without a collection device, coal dust spilled on the ground is difficult to clean up and will cause chaos. As a preferred solution of this utility model, [referring to...] Figure 1 and Figure 3 It also includes:

[0060] The top end of the collection pipe 16 is connected to the discharge end of the cyclone separator 5. After detection, the coal powder particles fall into the collection pipe 16, effectively recycling the collected coal powder, reducing material waste, and helping to reduce production costs.

[0061] After testing, the coal dust particles are collected by collection pipe 16, and then need to be processed manually or by other means. This not only increases the workload but may also lead to a waste of coal dust resources. As a preferred solution of this utility model, refer to Figure 1 and Figure 3 It also includes:

[0062] Blower 17, the output end of blower 17 is connected to one end of collection pipe 16;

[0063] The other end of the collection pipe 16 is connected to the pulverized coal pipe 1;

[0064] Among them, valve 18 is provided between the discharge end of cyclone separator 5 and collection pipe 16; valve 219 is provided in collection pipe 16.

[0065] During sampling and testing, valve 18 is opened and valve 29 is closed, preventing airflow from the coal powder pipeline 1 from entering the collection pipe 16, and allowing coal powder to fall into the collection pipe 16. After sampling and testing are completed, valve 18 is closed and valve 29 is opened, and the blower 17 is turned on to blow the coal powder in the collection pipe 16 back into the coal powder pipeline 1, thus achieving the reuse of coal powder.

[0066] If the drive shaft 8 is in direct contact with the inner wall of the guide hole, it will eventually lead to severe wear on the drive shaft 8 or the inner wall of the guide hole. As a preferred embodiment of this utility model, [referring to...] Figure 2 The drive shaft 8 is fixed with a bearing; the outer wall of the bearing contacts the inner wall of the guide hole. The presence of the bearing can significantly reduce the friction between the drive shaft 8 and the guide hole, making the drive shaft 8 move more smoothly, reducing wear, and extending the service life of the equipment.

[0067] As a preferred embodiment of this utility model, refer to Figure 2 The connecting plate 10 and the valve plate of the gate valve 9 are connected by two symmetrically arranged transition plates 20. The design of the symmetrical transition plates 20 ensures that the synchronous movement between the connecting plate 10 and the valve plate is more precise, reducing the deviation caused by uneven connection, thereby improving the accuracy of the opening and closing action of the gate valve 9.

[0068] As a preferred embodiment of this utility model, a sealing element 21 is provided between the connecting pipe 3 and the coal powder sampling gun 2; the sealing element 21 can be an O-ring, a bellows or other structure. By providing the sealing element 21 between the two, gas leakage in the gap between the two can be prevented, thus affecting the air quality outside.

[0069] As a preferred embodiment of this utility model, the testing box 131 is rotatably connected to a door; the door is rotatably connected to the testing box 131 via a hinge, and the door can be opened for maintenance when internal components of the testing box 131 are damaged.

[0070] 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 coal powder fineness detection device based on isokinetic sampling, comprising a coal powder pipeline (1), a coal powder sampling gun (2), and a connecting pipe (3) communicating with the coal powder pipeline (1), wherein the sampling end of the coal powder sampling gun (2) extends into the connecting pipe (3); characterized in that, The coal powder sampling gun (2) is located outside the connecting pipe (3), and one end is connected to a cyclone separator (5) through a flexible hose (4); Also includes: A fixing plate (6) is fixed to the outer wall of the pulverized coal pipe (1); A fixing block (7) is fixed on the coal powder sampling gun (2); the fixing block (7) is linearly slidably connected to the fixing plate (6); a drive shaft (8) is fixedly connected to the fixing block (7); The gate valve (9) includes a main body and a valve plate that slides linearly relative to the main body. The linear sliding direction of the valve plate is perpendicular to the linear sliding direction of the fixed block (7). The main body is disposed on the connecting pipe (3). A connecting plate (10) is connected to the valve plate; the connecting plate (10) has a guide hole, the guide hole includes an inclined section (11) and a straight section (12); the inclined section (11) has an angle with the movement trajectory of the driving shaft (8), and the straight section (12) is parallel to the movement trajectory of the driving shaft (8); When no sampling is performed, the drive shaft (8) passes through the inclined section (11) and the valve plate is closed; when sampling is performed, the drive shaft (8) passes through the straight section (12) and the valve plate slides straight to the position where the sampling end of the coal powder sampling gun (2) can pass through. It also includes a detection component (13) which is installed at the bottom of the cyclone separator (5).

2. The coal powder fineness detection device based on isokinetic sampling as described in claim 1, characterized in that, The detection component (13) includes: The cyclone separator (5) has its discharge end passing through the test box (131); and the cyclone separator (5) inside the test box (131) is made of transparent material. The detection component (13) also includes a light source (132) and a camera component (133), both of which are located inside the detection box (131); the light source (132) and the camera component (133) are located on both sides of the cyclone separator (5).

3. The coal powder fineness detection device based on isokinetic sampling as described in claim 1, characterized in that, Also includes: A power mechanism (14) is fixed to the fixed plate (6); the power mechanism (14) is used to drive the fixed block (7) to move.

4. The coal powder fineness detection device based on isokinetic sampling as described in claim 1, characterized in that, Also includes: Two flow rate sensors (15) are located inside the pulverized coal pipeline (1) and the pulverized coal sampling gun (2), respectively.

5. The coal powder fineness detection device based on isokinetic sampling as described in claim 1, characterized in that, Also includes: The top end of the collection pipe (16) is connected to the discharge end of the cyclone separator (5).

6. The coal powder fineness detection device based on isokinetic sampling as described in claim 5, characterized in that, Also includes: A blower (17) is provided, the output end of which is connected to one end of the collection pipe (16); The other end of the collecting pipe (16) is connected to the pulverized coal pipe (1); Among them, a valve one (18) is provided between the discharge end of the cyclone separator (5) and the collection pipe (16); a valve two (19) is provided on the collection pipe (16).

7. The coal powder fineness detection device based on isokinetic sampling as described in claim 1, characterized in that, The drive shaft (8) is fixed with a bearing; the outer wall of the bearing is in contact with the inner wall of the guide hole.

8. The coal powder fineness detection device based on isokinetic sampling as described in claim 1, characterized in that, The connecting plate (10) and the valve plate are connected by two symmetrically arranged transition plates (20).

9. The coal powder fineness detection device based on isokinetic sampling as described in claim 1, characterized in that, A sealing element (21) is provided between the connecting pipe (3) and the coal powder sampling gun (2).

10. The coal powder fineness detection device based on isokinetic sampling as described in claim 2, characterized in that, The testing box (131) is rotatably connected to a door.

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