Method for sensing leakage in advance and quickly processing leakage in transportation process of solid particle materials

Abstract

The invention discloses a method for sensing and quickly processing leakage in advance in the transportation process of solid particle materials. Comprising a pipeline frame, a buckle plate, a sensor, a limiting locking strip, a corner filling strip and a quick replacement method. The pipeline frame is a multi-window-shaped rigid frame made of carbon steel and is a fixed basic framework for forming the pipeline, and windows of the pipeline frame provide positions for installing the pinch plates and restrain the pinch plates; the pinch plate comprises a pinch plate base body formed by an airtight cavity, a sealing groove, a positioning frame, a dismounting handle, an inflating valve, a pressure sensor mounting threaded hole and the like; the limiting locking bar is made of carbon steel and cannot rotate under the constraint of the window frame after being mounted; the corner filling strips are made of carbon steel, can protect the window frame from being impacted by materials after being installed, do not affect replacement of the pinch plate, and can be detached and replaced after being abraded. When the airtight cavity on the pinch plate is locally abraded, the pressure in the airtight cavity is suddenly reduced to normal pressure, the pressure sensor sends a switch early warning signal to the control system, short-time short-time stop can be arranged in production scheduling, and the pinch plate can be rapidly replaced.

Description

TECHNICAL FIELD

[0001] Leakage early sensing and rapid treatment method in solid particle material transportation process BACKGROUND

[0002] The leakage problem in solid particle material transportation process, especially in the metallurgical industry, has been a very troublesome problem. Due to the need of production process, a high difference is artificially caused in the solid particle material (especially ore) transportation process. The friction of the transported material to the inner wall of the conveying pipeline or chute is inevitable, and some specific parts are rapidly worn out. Since the time of wear and tear cannot be predicted in advance, once the wear and tear occurs, the material leaks, which not only wastes the material but also pollutes the environment, and the production cannot be stopped. Sometimes it is in the middle of the night, and the repair environment is very poor, the efficiency is low, and sometimes it even directly causes the production to stop. Therefore, if the wear and tear of the conveying pipeline can be predicted in advance, the damaged parts can be replaced (only replacement, not repair) in a short time according to the wear and tear, the loss can be minimized, the waste and pollution to the environment caused by material leakage can be avoided, the repair engineering cost can be saved, and the maintenance construction environment can be greatly improved.

[0003] Figure 1 It is a coal conveying system layout of a power plant (coal gas station) of an alumina plant in the metallurgical industry. Since the calorific value requirement of raw coal is very high, the raw coal is hard, and the particle size is strictly required, too large or too small is not allowed. Therefore, a process layout like Figure 1 is generated. The raw coal is relayed by several obliquely placed belt conveyors to a crushing layer dozens of meters high. The raw coal enters the crusher 02 from the crusher inlet pipe 01. The crusher is provided with a screen mesh. The raw coal larger than the screen mesh is repeatedly crushed until it passes through the screen mesh (filtered out of the large ones) to enter the coal chute 03. The raw coal filtered out of the rotary screen 04 enters the waste bin 05 (for reuse in the boiler). Finally, the raw coal passing through the rotary screen enters the finished product bin 06 and then enters the coal gasifier.

[0004] The specific part of this scheme is the lower section of the coal chute 03. The cross-sectional size needs to be reduced to enter the rotary screen, and the flow rate is accelerated. The wear and tear of the lower and both sides of the plate is serious. Once the wear and tear occurs, the production needs to be repaired. The wear and tear part is as thin as a cicada's paper, and coal powder continuously pours out. The welding is very difficult, and the scene is full of coal powder and high temperature. The repair environment is very poor, and the efficiency is low. SUMMARY

[0005] The present application is aimed at the above-mentioned situation, and a leakage early sensing and rapid treatment method in solid particle material transportation process is invented. It mainly includes a pipeline frame, a buckle plate, a sensor, a limiting lock strip, a corner filling strip, a gas tight detection method, and a rapid replacement method.

[0006] The material sliding pipe of the case adopts three full-section installation buckling plates, but in practice, local installation buckling plate scheme can be adopted according to the actual situation on site, which solves the actual problem and saves the cost.

[0007] The pipe frame is a multi-window rigid frame composed of carbon steel, which is a fixed basic framework of the material sliding pipe, the window provides the position for buckling plate installation and constrains it, and in the structural design, it is ensured that the window frame (protected by the buckling plate) will not be directly impacted by the material in any case; The buckling plate is composed of a buckling plate base body with an airtight cavity, a sealing groove, a positioning frame, a disassembly handle, an air valve, a pressure sensor mounting thread hole and the like; The pressure sensor, here is a pressure switch, will output a switch signal to the outside when the pressure in the airtight cavity changes suddenly; The limiting lock bar is locked by a fastening nut and cannot rotate under the constraint of the window frame; The corner filler plays a role in protecting the window frame from material impact without affecting the replacement of the buckling plate, and can be replaced after severe wear and tear; The airtight detection method ensures that the airtight cavity is worn and leaks first when impacted by the particulate material, and the pressure sensor outputs a switch signal to the control system; The quick replacement method produces at least two buckling plates of each specification for rotation replacement, the frame window should be designed in a rectangular shape for easy disassembly, the lock nut is unscrewed, the limiting lock bar is removed, the disassembly handle is held and sent in a little bit, and then it is taken out from the diagonal line of the rectangle, and the new buckling plate is installed in the opposite steps, the replaced buckling plate is filled and welded by surfacing, and the four sides should be roughly ground before air pressure test, and the qualified one is reserved.

[0008] The beneficial effects of the present application are: (1) The buckling plate of the present application adopts an inverted installation method, i.e. from inside to outside, which has the advantages that: 1. The material will not impact and rub the pipe frame, keeping the pipe frame from being worn and deformed. 2. The impact force of the material will only make the buckling plate tighter, and the fastening bolt pair will not be impacted. 3. The fastening bolt and the lock nut do not come into contact with the material, which is convenient for disassembly and maintenance; (2) When the buckling plate airtight cavity is worn out, the pressure sensor sends a signal, at this time, since the airtight cavity is a sandwich design, it will not leak material to the outside, and the buckling plate can be replaced quickly in a short time with planned local shutdown, which minimizes the impact on normal production; (3) The frame corners are protected by installing corner fillers, which can protect the window frame from material impact without affecting the replacement of the buckling plate, and can be replaced after wear and tear; (4) The buckle plate and the corner filler replacement process does not need to be fired, does not produce waste, avoids the waste caused by material leakage and the pollution to the environment, saves the repair engineering cost, greatly improves the maintenance construction environment, is safe and efficient; (5) The buckle plate is recycled, saving cost. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a schematic diagram of a coal conveying system layout of a power plant (coal gas station) of a certain alumina plant in the metallurgical industry.

[0010] Figure 2 is a schematic diagram of the structure of the material sliding pipe (three sides of the whole section are installed with buckle plates).

[0011] Figure 3 is a schematic diagram of the frame structure of the material sliding pipe (three sides).

[0012] Figure 4 is a schematic diagram of the local disassembly of the material sliding pipe.

[0013] Figure 5 is a schematic diagram of the buckle plate structure.

[0014] Figure 6 is a detailed cross-sectional schematic diagram of the buckle plate structure.

[0015] Figure 7 is a local cross-sectional view of the material sliding pipe (three sides).

[0016] Figure 8 is a schematic diagram of the limiting lock strip structure.

[0017] Among them: 1 - pipe frame; 2 - buckle plate, 21 - buckle plate base body, 22 - sealing groove, 23 - positioning frame, 24 - disassembly handle, 25 - air valve, 26 - pressure sensor mounting thread hole; 3 - pressure sensor, the pressure sensor switch signal sending mode can be wired or wireless (environment is clean, convenient to replace); 4 - limiting lock strip, 41 - acute angle limiting lock strip, 42 - right angle limiting lock strip, 43 - obtuse angle limiting lock strip, which is locked by a fastening nut and cannot be rotated by the constraint of the window frame; 5 - corner filler, which can protect the window frame from material impact after installation and does not affect the replacement of the buckle plate, and can be replaced after serious wear. DETAILED DESCRIPTION

[0018] According to the specific embodiment of the present application, the early perception and rapid processing method of material leakage is provided, such as Figure 2As shown, the working surfaces (material scouring surfaces) of all the clamping plates 2 clamped on the frame 1 are arranged in parallel on the inner side of the chute pipe in three directions, and only a small gap exists between the upper and lower and left and right clamping plates 2, and only a small gap exists between the clamping plates 2 and the corner fillets 5 at the corners, so that only the working surfaces of the clamping plates 2 and the corner edges of the corner fillets 5 can be directly scoured by the material during the movement of the material, and the window frame is strictly protected. The working surfaces of the clamping plates 2 are directly scoured by the material and are abraded, and when the abrasion degree reaches a degree that the air-tight cavity on the clamping plate 2 is partially abraded, the pressure in the air-tight cavity is suddenly reduced to the normal pressure, and the pressure sensor 3 sends a switch warning signal to the control system. At this time, since the clamping plate 2 is designed as a cavity sandwich, the material will not leak, and after receiving the warning signal, the production scheduling room will arrange a temporary short-term stop according to the actual production situation, replace the clamping plate quickly (when replacing, the clamping plate 2 must be bound with a stay rope to prevent the clamping plate 2 from sliding into the chute pipe during the replacement process), and resume production.

[0019] The above only describes the preferred embodiments of the present application and is not used to limit the present application. The present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. This invention provides a method for early leakage detection during the transportation of solid particulate materials, characterized in that, The method for early detection of leakage during the transportation of solid particulate materials includes a pipe frame 1, a buckle plate 2, a limit lock strip 3, and a corner filler strip 5.

2. The method for early leakage detection during the transportation of solid particulate materials according to claim 1, characterized in that, The pipe frame 1 is a multi-window rigid frame made of carbon steel, which is the fixed basic structure of the chute. Its windows provide the position for the buckle plate 2 to be installed and constrain it.

3. The method for early leakage detection during the transportation of solid particulate materials according to claim 1, characterized in that, The buckle plate 2 consists of a buckle plate base 21 with an airtight cavity, a sealing groove 22, a positioning frame 23, a disassembly handle 24, a valve 25, and a pressure sensor mounting threaded hole 26.

4. The method for early leakage detection during the transportation of solid particulate materials according to claim 1, characterized in that, The limiting lock bar 3 is made of carbon steel and, after being locked by the fastening nut, is constrained by the window frame 1 and cannot rotate.

5. The method for early leakage detection during the transportation of solid particulate materials according to claim 1, characterized in that, The corner filler strip 5 is used to protect the pipe frame 1 from direct impact from materials without affecting the replacement of the buckle plate 2. It can be replaced when the wear is severe.

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