Reciprocating type automatic unblocking coal dropping pipe

Abstract

The invention relates to the technical field of material conveying, and discloses a reciprocating type automatic unblocking coal falling pipe which comprises a pipe body, a telescopic cylinder, a scraper assembly arranged in the pipe body and a plurality of material receiving plates arranged in a step shape. The material receiving plates arranged in a stepped mode play a role in dispersing coal materials with different particle sizes, the flowing path and the distribution state of the coal materials in the falling process are changed, the viscous small-particle coal materials flow downwards along the plate faces of the material receiving plates in a wall attaching mode on the lowest layer, and the coal materials with medium and large particle sizes rapidly pass through the plate faces of the material receiving plates on the upper layer in a bouncing falling mode. The flux of the coal materials on the material receiving plate is reduced by about 40-70%, and the coal materials with different particle sizes fall in a layered manner, so that the gathering and accumulation of the coal materials in local areas are effectively reduced; in the aspect of material cleaning, the telescopic cylinder drives each scraper main body of the scraper assembly to do reciprocating motion to scrape coal adhered to each material receiving plate, so that the long-standing technical problem that a coal falling pipe is blocked by wet sticky coal is effectively solved, the whole process does not need to be stopped, and an efficient operation mode of continuous production is realized.

Description

Technical Field

[0001] This invention relates to the field of material conveying technology, specifically to a reciprocating automatic unblocking coal drop pipe. Background Technology

[0002] In industries such as thermal power generation, coal transportation, and metallurgy, coal chutes are key equipment for material conveying, and their operational stability directly affects the efficiency and safety of the entire production process. In actual production, traditional coal chutes use a single slab as the bottom wall, with lump coal and pulverized coal mixed together and sliding down the wall. Due to the high moisture content, strong viscosity, and numerous impurities in the coal, coal chutes often face clogging problems.

[0003] Currently, traditional solutions for coal chute blockage mainly include manual cleaning, vibrator-assisted cleaning, air cannon unblocking, and rotary scraper unblocking. However, these methods have many drawbacks: manual cleaning is inefficient and poses significant safety hazards; the effects of vibrator-assisted and air cannon unblocking are limited and cannot completely solve the blockage problem; rotary scraper unblocking has a complex structure, high maintenance costs, and cannot guarantee continuous production. Therefore, there is an urgent need to develop an efficient, unmanned, closed-loop unblocking solution. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a reciprocating automatic unblocking coal chute, comprising a chute body, a telescopic cylinder, a scraper assembly disposed within the chute body, and several receiving plates; Several inclined and spaced material receiving plates are arranged vertically inside the tube, with each material receiving plate having two ends protruding from the side wall of the tube and placed outside the tube. The inside of the pipe is divided into a material conveying chamber and a scraper working chamber by several receiving plates. A feed inlet is provided at the top of the pipe above the material conveying chamber. An mounting base is installed at the top of the pipe above the scraper working chamber. The telescopic cylinder is fixed on the mounting base. The cylinder body of the telescopic cylinder is fixed on the mounting base. The telescopic rod of the telescopic cylinder extends into the inside of the scraper working chamber, and the scraper assembly is connected to the end of the telescopic rod of the telescopic cylinder. The scraper assembly includes an ear plate, a fixed plate, and a scraper body; a scraper body is movably inserted between every two adjacent receiving plates, the bottom ends of each scraper body are arranged in a stepped shape, the top ends of each scraper body are fixedly connected to the bottom surface of the fixed plate, the ear plate is fixedly attached to the top surface of the fixed plate, and the ear plate is fixedly connected to the end of the telescopic rod of the telescopic cylinder.

[0005] Preferably, a roller is provided in the scraper working chamber, which rotates and abuts against the bottom surface of the lowest scraper body, and the fixed shaft of the roller is fixedly connected to the side wall of the tube body.

[0006] Preferably, the scraper assembly further includes a support plate, and the support plate is provided between each two adjacent scraper bodies on one side of the fixed plate. When the telescopic rod of the telescopic cylinder extends and drives the scraper body into the material conveying chamber, the bottom end of each support plate abuts against the top end of the corresponding receiving plate.

[0007] Preferably, each of the scraper bodies includes a scraper and a wear-resistant plate that is adhered to the bottom of the scraper.

[0008] Preferably, multiple sets of discharge holes are provided on each scraper body, and each set of discharge holes is provided through the scraper in a direction perpendicular to the scraper surface.

[0009] Preferably, a reinforcing plate is attached and fixed to the outside of each of the two side walls of the tube body. One end of the receiving plate passes through the tube body, and the reinforcing plate is welded and fixed to the first positioning plate. The other end of the receiving plate passes through the tube body, and a second positioning plate is fastened to the reinforcing plate. The first positioning plate and the second positioning plate are detachably connected to the adjacent reinforcing plates.

[0010] Preferably, a first baffle plate is vertically provided above several of the receiving plates inside the pipe. The upper end of the first baffle plate extends to the feed inlet, the two sides of the first baffle plate extend to be fixedly connected to the side wall of the pipe, and the lower end of the first baffle plate extends to abut against the topmost receiving plate.

[0011] Preferably, a second baffle plate is vertically provided below several of the receiving plates inside the pipe. The upper end of the second baffle plate extends to abut against the bottommost receiving plate, and both sides of the second baffle plate extend to be fixedly connected to the side wall of the pipe. The lower end of the second baffle plate extends to the bottom end of the pipe, and the bottom end of the pipe is open. The lower end of the second baffle plate divides the opening at the bottom end of the pipe in two.

[0012] Preferably, an inspection port is provided on the side wall of the tube body in the scraper working chamber, and a cover plate is fixedly connected to the inspection port by bolts.

[0013] Preferably, a discharge bend is fixedly connected to the inlet of the tube body.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The advantages of this invention are as follows: First, this invention has several stepped material receiving plates arranged inside the pipe. The material passing interface formed by these stepped material receiving plates can disperse coal of different particle sizes. Compared with the traditional method where all coal slides down the wall as a whole, this design changes the flow path and distribution state of the coal during its descent. Medium and large-sized coal particles bounce quickly to the contact point of the next material receiving plate after impacting and contacting the first material receiving plate. Medium and large-sized coal particles quickly pass through each material receiving plate in a bouncing manner. The design of the receiving plates reduces the contact area between medium and large-sized coal particles and the receiving plates. Meanwhile, sticky small-particle coal flows downward along the walls of the bottom layer of receiving plates. The coal throughput after passing through several receiving plates can be reduced by about 40-70%, which can effectively disperse the impact force of the coal and reduce the wear of the coal on the receiving plate surface, thereby extending the service life of the receiving plates. Furthermore, the stratified falling of coal of different particle sizes can effectively reduce the accumulation and buildup of coal in local areas, avoid blockage of the coal chute due to material accumulation, and ensure the stable operation of the material conveying system.

[0015] Secondly, the present invention is provided with a scraper assembly, wherein each scraper body of the scraper assembly is slidably inserted between two adjacent receiving plates, and together with the receiving plates to form a clearing interface. When material accumulates or piles up in the material conveying cavity, the telescopic cylinder drives each scraper body of the scraper assembly to extend along the receiving plate into the material conveying cavity to clear the blockage and avoid material adhesion and accumulation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of the pipe body, mounting base, and cutting bend after being cut open.

[0018] Figure 3 This is a schematic diagram of the tube structure.

[0019] Figure 4 This is a structural schematic diagram of the reinforcing plate.

[0020] Figure 5 This is a schematic diagram of the scraper assembly.

[0021] Figure 6 for Figure 5 Top view.

[0022] Figure 7 for Figure 5 AA sectional view.

[0023] Figure 8 for Figure 5 BB cross-sectional view.

[0024] Figure 9This is a schematic diagram showing the state of the scraper assembly of the present invention when it is retracted.

[0025] Figure 10 This is a schematic diagram showing the state of the scraper assembly of the present invention when it is extended.

[0026] Figure 11 This is a schematic diagram of the coal falling state according to the present invention.

[0027] Figure 12 for Figure 11 A magnified view of part A in the image.

[0028] In the diagram: 1. Pipe body, 1.1. Material conveying chamber, 1.2. Scraper working chamber, 1.3. Feed inlet, 1.4. Inspection port, 2. Reinforcing plate, 3. Welcoming plate, 4. First positioning plate, 5. First baffle plate, 6. Second baffle plate, 7. Telescopic cylinder, 8. Scraper assembly, 8.1. Ear plate, 8.2. Fixing plate, 8.3. Scraper body, 8.3.1. Wear-resistant plate, 8.3.2. Discharge hole, 8.3.3. Support plate, 8.4. Roller, 9. Discharge bend, 10. Mounting base, 11. Cover plate, 12. Second positioning plate, 13. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1-12 A reciprocating automatic unblocking coal chute includes a pipe body 1, a reinforcing plate 2, a positioning plate 4, a first baffle plate 5, a second baffle plate 6, a telescopic cylinder 7, a scraper assembly 8, rollers 9, and several receiving plates 3 disposed inside the pipe body 1. A reinforcing plate 2 is attached and fixed to the outer side of each of the opposite side walls of the tube body 1. Each reinforcing plate 2 has several through-holes. The reinforcing plates 2 enhance the strength of the side walls of the tube body 1, preventing deformation due to stress. Several inclined and spaced receiving plates 3 are vertically arranged inside the tube body 1 between the two reinforcing plates 2. The distance between any two adjacent receiving plates 3 is 80mm. The receiving plates 3 are mirror-finished lining plates made of CCrSiMnNbNiV-A alloy composite material, with a surface hardness of HRC58-63 and a surface roughness of Ra1.6um-Ra3.2um. The material interface formed by the several receiving plates 3 reduces material adhesion, improves self-cleaning ability, and enhances wear resistance. One end of each receiving plate 3 passes through the side wall of the tube body 1 and the through-holes of the reinforcing plate 2, and is welded and fixed to the first positioning plate 4. After the other end of the receiving plate 3 passes through the strip hole of the side wall of the pipe body 1 and the reinforcing plate 2, a second positioning plate 13 is fastened. The first positioning plate 4 and the second positioning plate 13 are respectively fixed to the adjacent reinforcing plate 2 by bolts. The first positioning plate 4 and the second positioning plate 13 fix each receiving plate 3 to the reinforcing plate 2 on the pipe body 1, so as to prevent the receiving plate 3 from moving and gradually detaching from the pipe body 1 when the material passes through it. The first positioning plate 4 and the second positioning plate 13 can cover the gap between the receiving plate 3 and the reinforcing plate 2 respectively to prevent the material from spilling. In addition, the first positioning plate 4 and the second positioning plate 13 are fixed to the adjacent reinforcing plate 2 by bolts. When a receiving plate 3 is damaged, it is only necessary to remove the corresponding bolt, remove the second positioning plate 13 on one side of the pipe body 1, and pull the receiving plate 3 out from the other side of the pipe body 1. It can be quickly disassembled and replaced.

[0031] A first baffle plate 5 is vertically arranged above several receiving plates 3 inside the pipe body 1. The upper end of the first baffle plate 5 extends to the top of the pipe body 1, and the two sides of the first baffle plate 5 extend to be fixedly connected to the side wall of the pipe body 1. The lower end of the first baffle plate 5 extends to abut against the topmost receiving plate 3. A second baffle plate 6 is vertically arranged below several receiving plates 3 inside the pipe body 1. The upper end of the second baffle plate 6 extends to abut against the bottommost receiving plate 3, and the two sides of the second baffle plate 6 extend to be fixedly connected to the side wall of the pipe body 1. The lower end of the second baffle plate 6 extends to the bottom of the pipe body 1. The bottom of the pipe body 1 is open. The interior of the pipe body 1 is vertically divided into a material conveying chamber 1.1 and a scraper working chamber 1.2 by a first baffle plate 5, several welcoming plates 3, and a second baffle plate 6. The material conveying chamber 1.1 maintains basic material conveying functions, while the scraper working chamber 1.2 collects the accumulated material after the scraper assembly 8 has cleaned the material. The first baffle plate 5 and the second baffle plate 6 prevent material from entering the scraper working chamber 1.2, thus avoiding impact on the scraper assembly 8. An inlet 1.3 is provided at the top of the pipe body 1 above the material conveying chamber 1.1. A discharge bend 10 is fixedly connected to the inlet 1.3 of the pipe body 1 via a flange. When the coal enters the material conveying chamber 1.1 from the discharge bend 10, the coal falls along the material interface formed by the several welcoming plates 3. Compared with the traditional coal drop pipe where all coal slides down the wall as a whole, this design changes the flow path of the coal during the falling process. In the actual material feeding process, due to the inclined and stepped arrangement of several receiving plates 3, coal of different particle sizes can be dispersed. Sticky small coal particles slide down the bottom layer along the stepped receiving plate 3. Medium and large coal particles bounce off the first receiving plate 3 after impacting it, reducing the contact area between medium and large coal particles and the receiving plate 3. The coal throughput through several receiving plates 3 can be reduced by about 40-70%, effectively dispersing the impact force of the coal and reducing wear on the receiving plate surface, thereby extending the service life of the receiving plates. Furthermore, the stratified falling of coal of various particle sizes can effectively reduce the accumulation and buildup of coal in local areas, preventing blockage of the coal chute due to material accumulation and ensuring the stable operation of the material conveying system. The bottom opening of the pipe body 1 below the material conveying chamber 1.1 is the discharge port; the top of the pipe body 1 above the scraper working chamber 1.2 is fixed with a mounting base 11 by bolts, and a telescopic cylinder 7 is fixed on the mounting base 11. The telescopic cylinder 7 adopts a one-stop double-cylinder hydraulic drive system and is equipped with 2×63 type hydraulic cylinders. The cylinder body of the telescopic cylinder 7 is fixed on the outside of the mounting base 11, and the telescopic rod of the telescopic cylinder 7 passes down through the mounting base 11 and is fixedly connected to the scraper assembly 8. The telescopic cylinder 7 drives the scraper assembly 8 to extend into the material conveying chamber 1.1 to efficiently clean and push the highly viscous material. After completing a single cleaning, it immediately returns to the initial position to ensure the continuity and stability of the cleaning process.

[0032] The scraper assembly 8 includes an ear plate 8.1, a fixing plate 8.2, and a scraper body 8.3; a scraper body 8.3 is movably inserted between every two adjacent receiving plates 3, such as... Figure 5As shown, the length of each scraper body 8.3 increases sequentially from top to bottom and the ends are arranged in a stepped shape. The top of each scraper body 8.3 is fixedly connected to the bottom surface of the fixed plate 8.2. The top surface of the fixed plate 8.2 is fixed with an ear plate 8.1, which is fixedly connected to the end of the telescopic rod of the telescopic cylinder 7. The scraper body 8.3 and the receiving plate 3 cooperate to form a blockage clearing interface. When material accumulates or piles up in the material conveying chamber 1.1, the telescopic cylinder 7 drives each scraper body 8.3 of the scraper assembly 8 to extend along the corresponding receiving plate 3 into the material conveying chamber 1.1 to clear the blockage and prevent material from adhering and accumulating. A support plate 84 is provided between each pair of adjacent scraper bodies 8.3 at the top of the fixed plate 8.2. The support plate 8.4 can increase the strength of the scraper body 8.3 and also serve as a limit. When the telescopic rod of the telescopic cylinder 7 extends and drives the scraper body 8.3 of the scraper assembly 8 into the material conveying chamber 1.1, the bottom end of each support plate 8.4 abuts against the top end of the corresponding receiving plate 3. Each receiving plate 3 provides multi-point support for the scraper assembly 8. Each scraper body 8.3 includes a scraper 8.3.1 and a wear-resistant plate 8.3.2 that is attached to the bottom of the scraper 8.3.1. The wear-resistant plate 8.3.2 can improve the wear resistance of the scraper body 8.3 and increase its strength. When the bottom surface of the scraper body 8.3 is severely worn, the wear-resistant plate 8.3.2 can be replaced separately to extend the service life of the scraper body 8.3. Multiple sets of discharge holes 8.3.1 are opened through each scraper body 8.3. Each set of discharge holes 8.3.1 is arranged in a direction perpendicular to the plate surface. After the scraper body 8.3 completes a single cleaning and retracts, a small amount of material will stick to the gap between the scraper body 8.3 and the receiving plate 3. When the telescopic cylinder 7 drives each scraper body 8.3 of the scraper assembly 8 to extend again, the material stuck on each scraper body 8.3 will be pushed to its top by the receiving plate 3 and squeezed into the scraper working chamber 1.2 through the discharge holes 8.3.1, so as to avoid the accumulation of sticky material between each scraper body 8.3 and affect the movement of the scraper assembly 8 along the receiving plate 3. A roller 9 is provided in the scraper working chamber 1.2, which rotates and abuts against the bottom surface of the lowest wear-resistant plate 8.3.2. The fixed shaft of the roller 9 is fixedly connected to the side wall of the tube body 1. The bottom surface of the wear-resistant plate 8.3.2 slides in contact with the wheel surface of the roller 9. By designing the roller 9, the smoothness of the scraper assembly 8 can be improved, and the roller 9 plays a certain supporting role for the scraper assembly 8. An inspection port 1.4 is provided on the side wall of the tube body 1 of the scraper working chamber 1.4. A cover plate 12 is fixedly connected to the inspection port 1.4 by bolts. Operators can clean and inspect the inside of the coal chutes through the inspection port 1.4, promptly identify and resolve potential problems, and facilitate cleaning and maintenance.

[0033] Installation and usage process: Install the coal chute at a 70° angle to the horizontal plane, connect the inlet 1.3 of the coal chute to the outlet of the upstream material conveying equipment through the discharge bend 10, and smoothly connect the discharge outlet of the coal chute to the downstream material conveying equipment. During the material conveying process, the material enters the material conveying chamber 1.1 through the feed inlet 1.3 of the coal drop pipe. The coal falls along the material interface formed by several receiving plates 3. After the medium and large-sized coal particles impact and contact the first receiving plate 3, they quickly bounce to the contact point of the next receiving plate 3. The medium and large-sized coal particles quickly pass through each receiving plate 3 in a bouncing manner. The sticky small-particle coal slides down along the wall of the stepped receiving plates 3 at the bottom layer and finally enters the downstream material conveying equipment through the discharge port of the coal drop pipe. During the coal feeding process, since sticky small coal particles tend to stick to each receiving plate 3, the scraper body 8.3 of the scraper assembly 8 is periodically driven by the telescopic cylinder 7 to extend and retract between each receiving plate 3 to efficiently clean and push the highly sticky coal. After each cleaning, the scraper body is reset to the initial position to ensure that the material conveying chamber 1.1 of the coal feeding pipe can convey materials normally.

[0034] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A reciprocating automatic unblocking coal chute, characterized in that, It includes a pipe body, a telescopic cylinder, a scraper assembly disposed inside the pipe body, and several receiving plates; Several inclined and spaced material receiving plates are arranged vertically inside the tube, with each material receiving plate having two ends protruding from the side wall of the tube and placed outside the tube. The inside of the pipe is divided into a material conveying chamber and a scraper working chamber by several receiving plates. A feed inlet is provided at the top of the pipe above the material conveying chamber. An mounting base is installed at the top of the pipe above the scraper working chamber. The telescopic cylinder is fixed on the mounting base. The cylinder body of the telescopic cylinder is fixed on the mounting base. The telescopic rod of the telescopic cylinder extends into the inside of the scraper working chamber, and the scraper assembly is connected to the end of the telescopic rod of the telescopic cylinder. The scraper assembly includes an ear plate, a fixed plate, and a scraper body; a scraper body is movably inserted between every two adjacent receiving plates, the bottom ends of each scraper body are arranged in a stepped shape, the top ends of each scraper body are fixedly connected to the bottom surface of the fixed plate, the ear plate is fixedly attached to the top surface of the fixed plate, and the ear plate is fixedly connected to the end of the telescopic rod of the telescopic cylinder.

2. The reciprocating automatic unblocking coal chute according to claim 1, characterized in that, A roller is provided in the working chamber of the scraper, which rotates and abuts against the bottom surface of the scraper body at the bottom. The fixed shaft of the roller is fixedly connected to the side wall of the tube body.

3. The reciprocating automatic unblocking coal chute according to claim 1, characterized in that, The scraper assembly also includes a support plate. The support plate is provided between each pair of adjacent scraper bodies on one side of the fixed plate. When the telescopic rod of the telescopic cylinder extends and drives the scraper body into the material conveying chamber, the bottom end of each support plate abuts against the top end of the corresponding receiving plate.

4. A reciprocating automatic unblocking coal chute according to any one of claims 1-3, characterized in that, Each of the scraper bodies includes a scraper and a wear-resistant plate that is adhered to the bottom of the scraper.

5. A reciprocating automatic unblocking coal chute according to claim 4, characterized in that, Multiple sets of discharge holes are provided on each scraper body, and each set of discharge holes is provided through the scraper in a direction perpendicular to the scraper surface.

6. The reciprocating automatic unblocking coal chute according to claim 1, characterized in that, A reinforcing plate is attached and fixed to the outside of each of the two side walls of the tube. One end of the receiving plate passes through the tube and the reinforcing plate is welded and fixed to the first positioning plate. The other end of the receiving plate passes through the tube and a second positioning plate is fastened to it. The first positioning plate and the second positioning plate are detachably connected to the adjacent reinforcing plates.

7. A reciprocating automatic unblocking coal chute according to claim 6, characterized in that, A first baffle plate is vertically provided above several welcoming plates inside the pipe. The upper end of the first baffle plate extends to the inlet, and the two sides of the first baffle plate extend to be fixedly connected to the side wall of the pipe. The lower end of the first baffle plate extends to abut against the topmost welcoming plate.

8. A reciprocating automatic unblocking coal chute according to claim 7, characterized in that, A second baffle plate is vertically provided below several of the receiving plates inside the pipe. The upper end of the second baffle plate extends to abut against the bottommost receiving plate. Both sides of the second baffle plate extend to be fixedly connected to the side wall of the pipe. The lower end of the second baffle plate extends to the bottom end of the pipe. The bottom end of the pipe is open, and the lower end of the second baffle plate divides the opening at the bottom end of the pipe in two.

9. A reciprocating automatic unblocking coal chute according to claim 1, characterized in that, An inspection port is provided on the side wall of the tube body in the scraper working chamber, and a cover plate is fixedly connected to the inspection port by bolts.

10. A reciprocating automatic unblocking coal chute according to claim 1, characterized in that, A feed bend is fixedly connected to the feed inlet of the tube body.

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