Pulverized coal sampling device

Abstract

The utility model relates to the technical field of pulverized coal sampling, and discloses a pulverized coal sampling device which comprises a pulverized coal bin powder discharging pipe, a pulverized coal returning device is arranged at one end of the pulverized coal bin powder discharging pipe, a sample collector is arranged at the lower end of the pulverized coal returning device, and a limiting assembly is arranged at the lower end of the pulverized coal returning device; the pulverized coal returning device comprises a forward conveying pipe, a powder receiving hopper is arranged at one end of the forward conveying pipe, a forward spiral conveying mechanism is arranged at one end of the forward conveying pipe, a reverse spiral conveying pipe is arranged at the lower end of the forward conveying pipe, a connecting pipeline is arranged at the lower end of the forward conveying pipe, and the lower end of the connecting pipeline is communicated with the reverse spiral conveying pipe. A sample collecting pipeline is arranged at the lower end of the forward conveying pipe, a sample collector is arranged at the lower end of the sample collecting pipeline, and a limiting assembly is arranged at the lower end of the sample collecting pipeline. According to the utility model, the pulverized coal returning device is arranged, so that redundant pulverized coal generated in the sampling process can be returned and conveyed into the pulverized coal discharging pipe of the pulverized coal bunker, and the waste of the pulverized coal can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coal powder sampling, in particular to a coal powder sampling device. Background Art

[0002] For industrial pulverized coal boilers, pulverized coal fineness is a crucial parameter for combustion optimization. It not only significantly impacts the economic efficiency of the pulverizing system but also plays a crucial role in the safe and stable operation of the boiler. Measuring pulverized coal fineness relies on sampling. Based on this analysis and reference to the optimal economic curve, various operating parameters of the pulverizing system can be adjusted, which is crucial for the safe, economical, and stable operation of industrial pulverized coal boilers.

[0003] The existing pulverized coal sampling device is not convenient for returning excess samples during the sampling process, which easily causes waste of pulverized coal and increases sampling costs. Therefore, we propose a pulverized coal sampling device. Utility Model Content

[0004] The main purpose of the utility model is to provide a coal powder sampling device, which can effectively solve the technical problems in the background technology.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a coal powder sampling device includes a powder pipe under the coal powder bin, a coal powder return device is provided at one end of the coal powder pipe under the coal powder bin, a sample collector is provided at the lower end of the coal powder return device, a limit assembly is provided at the lower end of the coal powder return device, and the upper end of the sample collector is installed inside the limit assembly; the coal powder return device includes a forward conveying pipe, one end of the forward conveying pipe extends to the inside of the powder pipe under the coal powder bin, one end of the forward conveying pipe is provided with a powder receiving hopper, one end of the forward conveying pipe is provided with a forward spiral conveying mechanism, and the forward spiral conveying mechanism One end extends to the inside of the forward conveying pipe, and a reverse spiral conveying pipe is provided at the lower end of the forward conveying pipe. One end of the reverse spiral conveying pipe extends to the inside of the powder pipe under the pulverized coal bin, and one end of the reverse spiral conveying pipe is provided with a reverse spiral conveying mechanism. A connecting pipe is provided at the lower end of the forward conveying pipe, and the lower end of the connecting pipe is connected with the reverse spiral conveying pipe. A discharge port is provided at the lower end of the reverse spiral conveying pipe, a sample collecting pipe is provided at the lower end of the forward conveying pipe, a sample collector is provided at the lower end of the sample collecting pipe, a limit assembly is provided at the lower end of the sample collecting pipe, and the upper end of the sample collector is installed inside the limit assembly.

[0006] Preferably, the installation direction of the forward conveying pipe is perpendicular to the falling direction of the coal powder inside the lower powder pipe of the coal powder bin, and the installation direction of the reverse spiral conveying pipe is parallel to the forward conveying pipe.

[0007] Preferably, the limiting assembly includes a connecting seat, two sets of positioning plates are provided inside the connecting seat, a positioning ball is provided at one end of the positioning plate, the positioning ball is a hard steel ball, one end of the positioning ball is fixedly connected to the positioning plate, a limiting groove is provided on the outside of the sample collector, the limiting groove is adapted to the positioning ball, an adjusting screw is provided at one end of the outside of the connecting seat, the adjusting screw is threadedly connected to the connecting seat, and one end of the adjusting screw is movably connected to the positioning plate.

[0008] Preferably, the connecting seat is an annular hard metal ring, the connecting seat is sleeved on the outside of the sample collecting pipe, and the inside of the connecting seat is fixedly connected to the sample collecting pipe.

[0009] Preferably, the positioning plates are arc-shaped metal strips, and two sets of positioning plates are symmetrically installed on both sides of the interior of the connecting seat, and the shape of the positioning plates is adapted to the sample collector.

[0010] Preferably, a protective net and a metal protective plate are provided inside the powder receiving hopper, a coal powder falling hole is provided on the upper end of the protective net, and the protective net is fixedly connected to the powder receiving hopper.

[0011] The utility model provides a coal powder sampling device, which has the following beneficial effects:

[0012] 1. The pulverized coal sampling device is provided with a pulverized coal return device, which can return the excess pulverized coal generated during the sampling process to the inside of the pulverized coal bin powder pipe during the sampling process, thereby effectively avoiding the waste of pulverized coal and reducing the sampling cost.

[0013] 2. The pulverized coal sampling device can simplify the disassembly and assembly process of the sample collector by setting a limit component, shorten the disassembly and assembly time of the sample collector, improve the sampling efficiency, and facilitate daily use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art.

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the pulverized coal return device of the utility model;

[0017] Figure 3 It is a schematic diagram of the local structure of the utility model;

[0018] Figure 4 For this utility model Figure 3 Enlarged schematic diagram of point A in the middle.

[0019] Legend:

[0020] 1. Powder pipe under pulverized coal silo; 2. Powdered coal return device; 3. Limiting assembly; 4. Sample collector; 5. Forward conveying pipe; 6. Forward spiral conveying mechanism; 7. Powder receiving hopper; 8. Reverse spiral conveying pipe; 9. Reverse spiral conveying mechanism; 10. Discharge port; 11. Connecting pipe; 12. Sample collecting pipe; 13. Protective net; 14. Connecting seat; 15. Positioning plate; 16. Positioning ball; 17. Adjusting screw; 18. Limiting groove. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] Example 1: Coal dust sampling device, such as Figure 1 - Figure 3 As shown, it includes a powder pipe 1 under the coal powder bin, which is a hollow pipe. The upper end of the powder pipe 1 under the coal powder bin is fixedly connected to the coal powder bin, and a coal powder return device 2 is provided at one end of the outer side of the powder pipe 1 under the coal powder bin, and one end of the coal powder return device 2 is connected to the inside of the powder pipe 1 under the coal powder bin. The coal powder return device 2 can take samples from the inside of the powder pipe 1 under the coal powder bin during the material discharge process, and return the samples to the inside of the powder pipe 1 under the coal powder bin. A sample collector 4 is provided on one side of the lower end of the coal powder return device 2. The sample collector 4 is a hollow tank body with an opening at the center of the upper end. A limiting component 3 is provided at the lower end of the coal powder return device 2 relative to the position of the sample collector 4. The inner side of the limiting component 3 is fixedly connected to the coal powder return device 2, and the opening at the upper end of the sample collector 4 can be disassembled and installed inside the limiting component 3.

[0023] Furthermore, the coal powder return device 2 includes a forward conveying pipe 5, which is a cylindrical hollow pipe. The installation direction of the forward conveying pipe 5 is perpendicular to the falling direction of the coal powder inside the powder pipe 1 under the coal powder bin. One end of the forward conveying pipe 5 extends to the inside of the powder pipe 1 under the coal powder bin. The end of the forward conveying pipe 5 located inside the powder pipe 1 under the coal powder bin is provided with a powder receiving hopper 7. The powder receiving hopper 7 is a funnel-shaped hollow shell. The lower end of the powder receiving hopper 7 is fixedly connected to the forward conveying pipe 5. The internal cavity of the powder receiving hopper 7 is communicated with the inside of the forward conveying pipe 5. A forward spiral conveying mechanism 6 is provided at one end of the outer side of the forward conveying pipe 5. One end of the forward spiral conveying mechanism 6 passes through the forward conveying pipe 5 and extends to the inside of the forward conveying pipe 5. The forward spiral conveying mechanism 6 can be aligned The pulverized coal is transported to the inside of the conveying pipe 5. A reverse spiral conveying pipe 8 is provided at the lower end of the forward conveying pipe 5. The reverse spiral conveying pipe 8 is a cylindrical hollow pipe. The installation direction of the reverse spiral conveying pipe 8 is parallel to the forward conveying pipe 5. One end of the reverse spiral conveying pipe 8 extends to the inside of the powder pipe 1 under the coal powder bin. The reverse spiral conveying pipe 8 is fixedly connected to the powder pipe 1 under the coal powder bin. A reverse spiral conveying mechanism 9 is provided at one end of the outer side of the reverse spiral conveying pipe 8. One end of the reverse spiral conveying mechanism 9 extends to the inside of the reverse spiral conveying pipe 8. A connecting pipe 11 is provided on one side of the lower end of the forward conveying pipe 5. The upper end of the connecting pipe 11 is fixedly connected to the forward conveying pipe 5, and the lower end of the connecting pipe 11 is fixedly connected to the reverse spiral conveying pipe 8. The spiral conveying pipe 8 is located at the lower end of the powder pipe 1 under the coal powder bin and is provided with a discharge port 10. The upper end of the discharge port 10 is fixedly connected to the reverse spiral conveying pipe 8. When in use, the coal powder enters the forward conveying pipe 5 through the powder receiving hopper 7, falls into the reverse spiral conveying pipe 8 through the connecting pipe 11 under the conveyance of the forward spiral conveying mechanism 6, is conveyed by the reverse spiral conveying mechanism 9 inside the reverse spiral conveying pipe 8, and is returned to the powder pipe 1 under the coal powder bin through the discharge port 10. The lower end of the forward conveying pipe 5 is located between the powder pipe 1 under the coal powder bin and the connecting pipe 11. A sample collecting pipe 12 is provided. The upper end of the sample collecting pipe 12 is fixedly connected to the forward conveying pipe 5. The sample collecting pipe 12 is connected to the inside of the forward conveying pipe 5. An electromagnetic valve is provided inside the channel 12, and the electromagnetic valve is controlled by a time relay and can be automatically and intermittently opened or closed. A sample collector 4 is provided at the lower end of the sample collecting pipeline 12, and a limit assembly 3 is provided at the lower end of the sample collecting pipeline 12 relative to the position of the sample collector 4. The inner side of the limit assembly 3 is fixedly connected to the sample collecting pipeline 12, and the upper end of the sample collector 4 can be detachably installed inside the limit assembly 3. A protective net 13 is provided inside the powder receiving hopper 7, and the protective net 13 is a metal protective plate. The upper end of the protective net 13 is evenly provided with feeding holes for coal powder to fall. The outer side of the protective net 13 is fixedly connected to the powder receiving hopper 7. The protective net 13 can protect the powder hopper 7 to prevent larger coal blocks and stones inside the coal powder from entering the forward conveying pipe 5 and causing damage to the conveying equipment.

[0024] Example 2: Coal powder sampling device, based on Example 1 Figure 1 - Figure 4 As shown, the limiting component 3 includes a connecting seat 14, which is an annular hard metal ring. The connecting seat 14 is sleeved on the outside of the sample collecting pipe 12, and the inner side of the connecting seat 14 is fixedly connected to the sample collecting pipe 12. The internal cavity of the connecting seat 14 is provided with two groups of positioning plates 15, and the positioning plates 15 are arc-shaped hard metal strips. The two groups of positioning plates 15 are symmetrically installed on both sides of the inside of the connecting seat 14. The arc curvature of the positioning plates 15 is adapted to the shape of the sample collector 4. A positioning ball 16 is provided at one end of the positioning plate 15 close to the sample collector 4. The positioning ball 16 is a hard metal steel ball. One end of the positioning ball 16 is fixedly welded to the positioning plate 15. A limiting groove 18 is provided on the outside of the sample collector 4 relative to the position of the positioning ball 16. The shape of the limiting groove 18 is consistent with the positioning ball 16. The ball 16 is adapted in shape, and the positioning ball 16 can be inserted into the limiting groove 18 to limit the sample collector 4. A sealing ring is provided at the upper end of the sample collector 4, and the lower end of the sealing ring is fixedly bonded to the sample collector 4. The sealing ring can increase the sealing between the sample collector 4 and the sample collecting pipe 12 to avoid coal powder leakage during sampling. An adjusting screw 17 is provided on the outer side of the connecting seat 14 relative to one end of the positioning plate 15. One end of the adjusting screw 17 is threadedly connected to the connecting seat 14, and one end of the adjusting screw 17 extends to the inside of the connecting seat 14 and is movably connected to the positioning plate 15. By rotating the adjusting screw 17, the positioning plate 15 can be pushed to move. During the movement, the positioning plate 15 inserts the positioning ball 16 into the limiting groove 18 to limit the sample collector 4.

[0025] It should be noted that the present invention is a coal powder sampling device. When in use, first set the solenoid valve on the outside of the sample collecting pipe 12, automatically and intermittently open and close the time, and then open the forward spiral conveying mechanism 6. The coal powder inside the powder pipe 1 under the coal powder bin will enter the forward conveying pipe 5 through the powder receiving hopper 7 during the falling process. During the conveying process, the coal powder will fall into the sample collector 4 through the sample collecting pipe 12 for collection. The excess coal powder will be conveyed to the reverse spiral conveying pipe 8 through the connecting pipe 11 at the lower end of the forward conveying pipe 5, and will be conveyed through the reverse spiral conveying mechanism 9 inside the reverse spiral conveying pipe 8. , and finally it is transported back to the inside of the powder pipe 1 under the coal powder bin through the discharge port 10, and the protective net 13 is set inside the powder hopper 7. The protective net 13 can prevent large coal blocks and stones inside the coal powder from entering the inside of the forward conveying pipe 5, causing damage to the conveying equipment. After the sampling is completed, the forward spiral conveying mechanism 6 and the reverse spiral conveying mechanism 9 are closed, and then the adjusting screw 17 is rotated in the opposite direction. The adjusting screw 17 moves with the positioning ball 16 at one end of the positioning plate 15, and moves out from the inside of the limit groove 18, canceling the limit on the sample collector 4, and then the sample collector 4 is removed from the inside of the connecting seat 14, and the sample inside the sample collector 4 is sampled. By setting the coal powder return device 2, the excess coal powder generated during the sampling process can be returned to the inside of the powder pipe 1 under the coal powder bin during the sampling process, which can effectively avoid the waste of coal powder and reduce the sampling cost. By setting the limit component 3, the disassembly and assembly process of the sample collector 4 can be simplified, the disassembly and assembly time of the sample collector 4 can be shortened, the sampling efficiency can be improved, and it is convenient for daily use.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A pulverized coal sampling device, comprising a pulverized coal silo lower pulverized coal pipe (1), characterized in that: A pulverized coal silo lower powder pipe (1) is provided at one end with a pulverized coal silo return device (2), a sample collector (4) is provided at the lower end of the pulverized coal silo return device (2), a limit assembly (3) is provided at the lower end of the pulverized coal silo return device (2), and the upper end of the sample collector (4) is installed inside the limit assembly (3); the pulverized coal silo return device (2) comprises a forward conveying pipe (5), one end of the forward conveying pipe (5) extends into the pulverized coal silo lower powder pipe (1), one end of the forward conveying pipe (5) is provided with a powder receiving hopper (7), one end of the forward conveying pipe (5) is provided with a forward spiral conveying mechanism (6), one end of the forward spiral conveying mechanism (6) extends into the pulverized coal silo, and the lower end of the forward conveying pipe (5) is provided with a A reverse spiral conveying pipe (8) is provided, one end of which extends to the interior of the pulverized coal bin lower powder pipe (1), one end of which is provided with a reverse spiral conveying mechanism (9), a connecting pipe (11) is provided at the lower end of the forward conveying pipe (5), the lower end of which is connected to the reverse spiral conveying pipe (8), a discharge port (10) is provided at the lower end of the reverse spiral conveying pipe (8), a sample collecting pipe (12) is provided at the lower end of the forward conveying pipe (5), a sample collector (4) is provided at the lower end of the sample collecting pipe (12), a position limiting assembly (3) is provided at the lower end of the sample collector (4), and the upper end of the sample collector (4) is installed inside the position limiting assembly (3).

2. The pulverized coal sampling device according to claim 1, characterized in that: The installation direction of the forward conveying pipe (5) is perpendicular to the falling direction of the coal powder inside the coal powder bin lower powder pipe (1), and the installation direction of the reverse spiral conveying pipe (8) is parallel to the forward conveying pipe (5).

3. The pulverized coal sampling device according to claim 1, characterized in that: The limiting assembly (3) includes a connecting seat (14), two groups of positioning plates (15) are provided inside the connecting seat (14), one end of the positioning plate (15) is provided with a positioning ball (16), the positioning ball (16) is a hard steel ball, one end of the positioning ball (16) is fixedly connected to the positioning plate (15), the outer side of the sample collector (4) is provided with a limiting groove (18), the limiting groove (18) is adapted to the positioning ball (16), one end of the outer side of the connecting seat (14) is provided with an adjusting screw (17), the adjusting screw (17) is threadedly connected to the connecting seat (14), and one end of the adjusting screw (17) is movably connected to the positioning plate (15).

4. The pulverized coal sampling device according to claim 3, characterized in that: The connecting seat (14) is an annular hard metal ring. The connecting seat (14) is sleeved on the outside of the sample collecting pipe (12), and the inside of the connecting seat (14) is fixedly connected to the sample collecting pipe (12).

5. The pulverized coal sampling device according to claim 3, characterized in that: The positioning plates (15) are arc-shaped metal strips. Two groups of the positioning plates (15) are symmetrically mounted on both sides of the interior of the connecting seat (14). The shape of the positioning plates (15) is adapted to the sample collector (4).

6. The pulverized coal sampling device according to claim 1, characterized in that: A protective net (13) is provided inside the powder receiving hopper (7), the protective net (13) is a metal protective plate, a coal powder falling hole is provided at the upper end of the protective net (13), and the protective net (13) is fixedly connected to the powder receiving hopper (7).

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