Early warning and dredging safety device for blockage of coal ash transportation pipeline in thermal power plant

Abstract

The utility model provides power plant fly ash transportation pipeline blockage early warning and dredging safety device relates to pipeline control technical field, including the conveying pipeline, the rear end of conveying pipeline turns down, and the front end of conveying pipeline is provided with the curved branch pipeline above, the outside fixed setting of conveying pipeline's above is annular channel, and the top of annular channel is connected and is provided with six eccentric channels, and the number of each eccentric channel is two groups, the top of eccentric channel all sets up branch pipeline and is connected with check valve A and pressure limiter, and check valve A is connected to conveying pipeline, the utility model discloses blockage early warning precision high efficiency, through the combination structure of speed measuring impeller, trigger wheel and counting sensor, real -time monitoring fly ash delivery speed, and when being abnormal, quickly identify blockage or sensor failure, and the multi -sensor verification design further improves the early warning accuracy, and the problem of inconvenient real -time monitoring of prior art is solved.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline control technology, and more specifically, it relates to a safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants. Background Technology

[0002] Coal-fired power plants generate a large amount of fly ash, which accounts for more than 30% of the total industrial solid waste annually. As a recyclable resource, it needs to be efficiently transported to ash storage facilities or off-site transportation points via pipelines. Currently, the mainstream method is pneumatic conveying systems, which have been widely applied in the industry due to their small footprint, high efficiency, and good environmental performance.

[0003] Based on the above, the current conveying process is inconvenient to monitor whether the pipeline is blocked in real time, and to quickly clear the blockage after it occurs, lacking an automatic conveying structure. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants. This device solves the problems mentioned in the background art, such as the inconvenience of real-time monitoring of pipeline transport during the transport process, the inability to quickly unblock and relieve blockages after they occur, and the lack of an automatic transport structure.

[0005] The purpose and effectiveness of this utility model's safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants are achieved through the following specific technical means: A safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants includes a transport pipeline with a downward bend at its rear end and a curved branch pipe above its front end. An annular channel is fixedly installed on the upper exterior of the transport pipeline, and six rows of eccentric channels are connected to the top of the annular channel, with two sets of eccentric channels in each row. Each eccentric channel has a branch pipe at its top connected to a one-way valve A and a pressure limiter; one-way valve A is connected to the transport pipeline. Two sets of air rings are fixedly installed on the outer exterior of the middle of the transport pipeline. Two sets of pressure-boosting telescopic cylinders are fixedly installed below the middle of the transport pipeline, and two sets of one-way valves B are fixedly installed at the rear end of each pressure-boosting telescopic cylinder, with the upper one-way valve B connected to the air ring. A sealing plate is fixedly installed at the front end of the transport pipeline, and an electric cylinder is fixedly installed on the rear side of the sealing plate. An inner pipe mold is fixedly installed at the telescopic end of the electric cylinder, and the inner pipe mold fits against the inner wall of the transport pipeline. The upper rear end of the inner pipe mold matches the bend in the upper part of the transport pipeline.

[0006] Furthermore, six sets of rubber sealing frames are fixedly installed around the upper exterior of the conveying pipe, and each of the six sets of sealing frames is fixedly equipped with vibrating fins; the side of the vibrating fins inside the conveying pipe has a slope, and the side of the vibrating fins outside the conveying pipe is fixedly equipped with two sets of triangular fins with upward-sloping surfaces.

[0007] Furthermore, two sets of through holes are fixedly provided in the upper middle of the conveying pipe. A sponge plug is fixedly provided in the lower part of each through hole, and an air inlet is fixedly provided in the upper part of each through hole. The top of the air inlet is connected to an air ring.

[0008] Furthermore, a speed measuring channel is integrally provided at the front end of the rear bend of the conveying pipeline, a speed measuring impeller is rotatably arranged in the speed measuring channel, and a trigger wheel is fixedly arranged at one end of the rotating shaft of the speed measuring impeller through the speed measuring channel; a counting sensor is fixedly arranged outside the speed measuring channel, and a flange is integrally provided outside the trigger wheel to trigger the counting sensor.

[0009] Furthermore, an impeller is rotatably arranged inside the eccentric channel, and a striker is fixedly arranged outside the impeller shaft. The striker consists of two sets of spring telescopic rods, and a hammer is fixedly arranged at the end of each telescopic rod. When the striker rotates, the hammer can contact the triangular fin outside the vibrating fin.

[0010] Furthermore, two sets of guide plates are fixedly installed inside the lower part of the pressure limiter, and trapezoidal blocks are slidably installed outside the guide plates. A push screw is threadedly connected to the bottom of the pressure limiter. A movable step block is slidably installed inside the upper part of the pressure limiter. Two sets of guide rods are fixedly installed at the top of the pressure limiter. Springs are sleeved on the guide rods and they extend out of the top of the pressure limiter. An adjustment hole is opened at the top of the pressure limiter.

[0011] Furthermore, a dust cover is provided at the rear end of the one-way valve B below the rear side of the booster telescopic cylinder.

[0012] Furthermore, four sets of directional rods are fixedly installed at the front end of the inner mold of the pipe, and connecting rods are fixedly installed at the front ends of the four sets of directional rods.

[0013] Furthermore, the rear end of the connecting rod bends upward and is fixedly connected to the telescopic end of the front booster telescopic cylinder; the rear end of the connecting rod is provided with an extended L-shaped plate that is fixedly connected to the telescopic end of the rear booster telescopic cylinder.

[0014] Furthermore, an air pump is fixedly installed on the top front side of the conveying pipe, and the air outlet of the air pump is connected to the annular channel.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides accurate and efficient blockage early warning. Through a combination of a speed measuring impeller, a trigger wheel, and a counting sensor, it monitors the speed of fly ash conveying in real time. When an abnormality occurs, it quickly identifies blockages or sensor malfunctions. The multi-sensor verification design further improves the accuracy of the early warning and solves the problem of inconvenient real-time monitoring in existing technologies.

[0016] This utility model features a high degree of automation in unblocking, integrating a triple unblocking mechanism of mechanical propulsion of the inner pipe mold, air ring pressurization assistance, and vibration fins. An electric cylinder drives the inner pipe mold to directly pressurize and unblock, while a synchronously linked pressurizing telescopic cylinder supplements air pressure. An air pump drives the vibrator to achieve vibration-based unblocking, quickly relieving blockages without manual intervention.

[0017] This utility model features strong operational safety and stability. The pressure limiter can precisely adjust the outlet pressure to avoid pressure overload in the pipeline. The sponge plug filters impurities and protects the air intake structure. The dust cover prevents contamination of the one-way valve. The multiple protection designs ensure long-term stable operation of the device and reduce maintenance costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the axonal structure of this utility model.

[0020] Figure 3 This is a three-dimensional sectional view of the present invention.

[0021] Figure 4 This is a three-dimensional cross-sectional view of the pressure limiter of this utility model.

[0022] Figure 5 This is a utility model Figure 1 A magnified schematic diagram of the structure at point A.

[0023] Figure 6 This is a utility model Figure 3 A magnified schematic diagram of the structure at point B.

[0024] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Conveying pipe; 101. Sealing frame; 102. Vibrating fins; 103. Sponge plug; 104. Air inlet; 105. Speed ​​measuring channel; 106. Speed ​​measuring impeller; 107. Trigger wheel; 108. Counting sensor; 2. Annular channel; 3. Eccentric channel; 301. Impactor; 302. One-way valve A; 4. Pressure limiter; 401. Guide plate; 402. Trapezoidal block; 403. Propulsion screw; 404. Movable step block; 405. Guide rod; 5. Air ring; 6. Pressure boosting telescopic cylinder; 601. One-way valve B; 7. Sealing plate; 701. Electric cylinder; 702. Inner mold of the pipe; 703. Directional rod; 704. Connecting rod; 8. Air pump. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0026] Example 1: As attached Figure 1 To be continued Figure 6 As shown: This utility model provides a safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants, including a transport pipeline 1, the rear end of which bends downwards, and a curved branch pipe is provided above the front end of the transport pipeline 1; an annular channel 2 is fixedly provided on the upper exterior of the transport pipeline 1, and six rows of eccentric channels 3 are connected to the top of the annular channel 2, with two sets of eccentric channels 3 in each row; a branch pipe is provided at the top of each eccentric channel 3, connected to a one-way valve A302 and a pressure limiter 4, and the one-way valve A302 is connected to the transport pipeline 1; the middle exterior of the transport pipeline 1... Two sets of air rings 5 ​​are fixedly installed; two sets of pressure boosting telescopic cylinders 6 are fixedly installed at the lower middle of the conveying pipeline 1, and two sets of one-way valves B601 are fixedly installed at the rear end of each pressure boosting telescopic cylinder 6, with the upper one-way valves B601 connected to the air rings 5; a sealing plate 7 is fixedly installed at the front end of the conveying pipeline 1, and an electric cylinder 701 is fixedly installed at the rear side of the sealing plate 7. A pipe inner mold 702 is fixedly installed at the telescopic end of the electric cylinder 701, and the pipe inner mold 702 fits against the inner wall of the conveying pipeline 1; the rear upper part of the pipe inner mold 702 matches the upper bend of the conveying pipeline 1.

[0027] Among them, six sets of rubber sealing frames 101 are fixedly installed around the outside of the upper part of the conveying pipe 1, and each of the six sets of sealing frames 101 is fixedly installed with a vibrating fin 102; the vibrating fin 102 is located on the side of the conveying pipe 1 with a slope above it, and the vibrating fin 102 is located on the side of the conveying pipe 1 with two sets of triangular fins with the slope facing upwards.

[0028] Two sets of through holes are fixedly installed in the upper middle of the conveying pipe 1. A sponge plug 103 is fixedly installed in the lower part of each through hole, and an air inlet 104 is fixedly installed in the upper part of each through hole. The top of the air inlet 104 is connected to the air ring 5.

[0029] Among them, a speed measuring channel 105 is integrally provided at the front end of the rear bend of the conveying pipe 1, a speed measuring impeller 106 is rotatably provided in the speed measuring channel 105, and a trigger wheel 107 is fixedly provided at one end of the rotating shaft of the speed measuring impeller 106 through the speed measuring channel 105; a counting sensor 108 is fixedly provided outside the speed measuring channel 105, and a flange is integrally provided outside the trigger wheel 107 to trigger the counting sensor 108.

[0030] An impeller is rotatably installed inside the eccentric channel 3, and a striker 301 is fixedly installed outside the impeller shaft. The striker 301 is composed of two sets of spring telescopic rods. A hammer is fixedly installed at the end of each telescopic rod. When the striker 301 rotates, the hammer can contact the triangular fin outside the vibrating fin 102.

[0031] The pressure limiter 4 has two sets of guide plates 401 fixedly installed at the bottom inside, and trapezoidal blocks 402 slidably installed outside the guide plates 401. The bottom of the pressure limiter 4 is threadedly connected to a push screw 403. The pressure limiter 4 has a movable step block 404 slidably installed at the top inside, and two sets of guide rods 405 fixedly installed at the top of the pressure limiter 4. The guide rods 405 are fitted with springs and extend out of the top of the pressure limiter 4. The pressure limiter 4 has an adjustment hole at the top.

[0032] Among them, a dust cover is installed at the rear end of the one-way valve B601 located below the rear side of the booster telescopic cylinder 6.

[0033] Among them, four sets of directional rods 703 are fixedly installed at the front end of the inner mold of the pipe 702, and connecting rods 704 are fixedly installed at the front end of the four sets of directional rods 703.

[0034] The rear end of the connecting rod 704 is bent upward and fixedly connected to the telescopic end of the front booster telescopic cylinder 6; the rear end of the connecting rod 704 is provided with an extended L-shaped plate that is fixedly connected to the telescopic end of the rear booster telescopic cylinder 6.

[0035] An air pump 8 is fixedly installed on the top front side of the conveying pipe 1, and the air outlet of the air pump 8 is connected to the annular channel 2.

[0036] When conveying and judging the status of fly ash: Fly ash is discharged from the bottom of the conveying pipe 1 from top to bottom. When discharged, it drives the speed measuring impeller 106 and the trigger wheel 107 to rotate. The trigger counting sensor 108 calculates the speed to judge the conveying status. An abnormality indicates blockage or failure of the counting sensor 108. It can be verified by two or more sets of counting sensors 108. For example, counting sensors 108 are installed on both sides of the speed measuring channel 105, and trigger wheels 107 are installed at both ends of the rotating shaft of the speed measuring impeller 106 for double verification.

[0037] Propulsion and unblocking state: The electric cylinder 701 pushes the inner mold 702 of the pipe to increase pressure and unblock. During the movement, the pressure-boosting telescopic cylinder 6 is squeezed by the directional rod 703 and the connecting rod 704. The air in the pressure-boosting telescopic cylinder 6 is input into the air ring 5 through the upper one-way valve B601, and then enters the delivery pipe 1 through the air inlet 104 and the sponge plug 103 to assist in pressure boosting and unblocking. When the inner mold 702 of the pipe is reset, the pressure-boosting telescopic cylinder 6 extends and draws in air to replenish through the lower one-way valve B601.

[0038] Air pressure regulation and working condition: The push screw 403 lifts the trapezoidal block 402 and squeezes the movable trapezoidal block 404 to increase its spring pressure and improve the air pressure; the pressure limiter 4 ensures that air can still flow when the upper part of the conveying pipe 1 is severely blocked and air cannot enter, thus ensuring the normal rotation of the knocker 301.

[0039] Example 2: Air is pumped into the annular channel 2 by the air pump 8. The air is then pumped upward through the eccentric channel 3 and can be fed into the delivery pipe 1 through the one-way valve A302 or discharged to the outside through the pressure limiter 4. When the air passes through the eccentric channel 3, it drives the impeller inside to rotate, which in turn drives the knocker 301 to rotate synchronously, knocking the vibrating fins 102 to achieve vibration and unblocking.

[0040] The specific usage and function of this embodiment are as follows: In this utility model, when in use, fly ash is conveyed from top to bottom and discharged from the bottom of the conveying pipe 1; During the discharge process, the fly ash drives the speed measuring impeller 106 to rotate, which in turn drives the trigger wheel 107 to rotate, triggering the counting sensor 108 to calculate the rotation speed and determine whether the fly ash is being transported normally. If the counting sensor 108 provides abnormal feedback, it indicates a blockage or a malfunction. You can choose to install two or more sets of counting sensors 108 to verify this and ensure that the counting sensor 108 accurately reports the blockage information. If a blockage occurs, begin clearing it. The electric cylinder 701 is activated to push the inner mold 702 of the pipe, directly pressurizing and pushing it to clear the blockage. During the movement of the inner mold 702, the directional rod 703 and the connecting rod 704 also squeeze the pressurizing telescopic cylinder 6, and the air in the pressurizing telescopic cylinder 6 is fed into the air ring 5 through the upper one-way valve B601, and then into the conveying pipe 1 through the air inlet 104 and the sponge plug 103 to assist in pressurizing and clearing the blockage. When the inner mold 702 of the pipeline is reset, the pressurizing telescopic cylinder 6 extends and draws in air through the one-way valve B601 below for replenishment. Start the air pump 8 to deliver air into the annular channel 2. The air is delivered upward through the eccentric channel 3 and enters the delivery pipeline 1 through the one-way valve A302 or is discharged to the outside through the pressure limiter 4. When air passes through the eccentric channel 3, it drives the impeller inside to rotate, which in turn causes the knocker 301 to rotate synchronously, knocking and vibrating the fins 102 to clear the blockage. The push screw 403 lifts the trapezoidal block 402, which can compress the movable trapezoidal block 404, increasing the spring pressure of the movable trapezoidal block 404 and thus increasing the air pressure. The pressure limiter 4 can ensure that air can still flow even when the upper part of the conveying pipe 1 is severely blocked and air cannot enter, ensuring that the knocker 301 can rotate and work.

Claims

1. A safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants, characterized in that, include: The conveying pipeline (1) has a downward bend at its rear end and a curved branch pipe above its front end. An annular channel (2) is fixedly installed on the upper exterior of the conveying pipeline (1). Six rows of eccentric channels (3) are connected to the top of the annular channel (2), with two sets of eccentric channels (3) in each row. A branch pipe is installed at the top of each eccentric channel (3) and is connected to a one-way valve A (302) and a pressure limiter (4). The one-way valve A (302) is connected to the conveying pipeline (1). Two sets of air rings (5) are fixedly installed on the middle exterior of the conveying pipeline (1). (1) Two sets of pressure-boosting telescopic cylinders (6) are fixedly installed in the middle and lower part. Two sets of one-way valves B (601) are fixedly installed at the rear end of each pressure-boosting telescopic cylinder (6). The upper one-way valves B (601) are connected to the air ring (5). A sealing plate (7) is fixedly installed at the front end of the conveying pipe (1). An electric cylinder (701) is fixedly installed on the rear side of the sealing plate (7). A pipe inner mold (702) is fixedly installed at the telescopic end of the electric cylinder (701). The pipe inner mold (702) fits against the inner wall of the conveying pipe (1). The rear upper part of the pipe inner mold (702) matches the upper pipe bend of the conveying pipe (1).

2. The safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants as described in claim 1, characterized in that: Six sets of rubber sealing frames (101) are fixedly installed around the outside of the conveying pipe (1), and each of the six sets of sealing frames (101) is fixedly installed with a vibrating fin (102). The vibrating fin (102) is located on the side inside the conveying pipe (1) with a slope above it, and the vibrating fin (102) is located on the side outside the conveying pipe (1) with two sets of triangular fins with the slope facing upwards.

3. The safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants as described in claim 1, characterized in that: Two sets of through holes are fixedly installed in the middle upper part of the conveying pipe (1). A sponge plug (103) is fixedly installed in the lower part of each through hole, and an air inlet (104) is fixedly installed in the upper part of each through hole. The top of the air inlet (104) is connected to the air ring (5).

4. The safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants as described in claim 1, characterized in that: A speed measuring channel (105) is integrally provided at the front end of the rear bend of the conveying pipe (1). A speed measuring impeller (106) is rotatably provided in the speed measuring channel (105). One end of the rotating shaft of the speed measuring impeller (106) passes through the speed measuring channel (105) and a trigger wheel (107) is fixedly provided. A counting sensor (108) is fixedly provided outside the speed measuring channel (105). A flange is integrally provided outside the trigger wheel (107) and can trigger the counting sensor (108).

5. The safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants as described in claim 2, characterized in that: An impeller is rotatably arranged inside the eccentric channel (3), and a knocker (301) is fixedly arranged outside the impeller shaft. The knocker (301) is composed of two sets of spring telescopic rods. A hammer is fixedly arranged at the end of each telescopic rod. When the knocker (301) rotates, the hammer can contact the triangular fin outside the vibrating fin (102).

6. The safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants as described in claim 1, characterized in that: Two sets of guide plates (401) are fixedly installed inside the lower part of the pressure limiter (4). A trapezoidal block (402) is slidably installed outside the guide plate (401). A push screw (403) is threadedly connected to the bottom of the pressure limiter (4). A movable step block (404) is slidably installed inside the upper part of the pressure limiter (4). Two sets of guide rods (405) are fixedly installed on the top of the pressure limiter (4). A spring is sleeved on the guide rod (405) and it extends out of the top of the pressure limiter (4). An adjustment hole is opened on the top of the pressure limiter (4).

7. The safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants as described in claim 1, characterized in that: A dust cover is provided at the rear end of the one-way valve B (601) below the rear side of the booster telescopic cylinder (6).

8. The safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants as described in claim 1, characterized in that: The front end of the inner mold of the pipe (702) is fixedly provided with four sets of directional rods (703), and the front end of the four sets of directional rods (703) is fixedly provided with connecting rods (704).

9. The safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants as described in claim 8, characterized in that: The rear end of the connecting rod (704) is bent upward and fixedly connected to the telescopic end of the front booster telescopic cylinder (6); the rear end of the connecting rod (704) is provided with an extended L-shaped plate that is fixedly connected to the telescopic end of the rear booster telescopic cylinder (6).

10. The safety device for early warning and unblocking of fly ash transport pipelines in thermal power plants as described in claim 1, characterized in that: An air pump (8) is fixedly installed on the top front side of the conveying pipe (1), and the air outlet of the air pump (8) is connected to the annular channel (2).

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