Repair assembly based on the protruding parts of the surface hardfacing of the wear roller of a coal mill

Abstract

The utility model relates to coal mill technical field especially is based on the repair assembly of the protruding position of surfacing welding of wear -resistant roller surface of coal mill, including bottom plate, support rod, adjusting cap and mill roller body, the outer side of support rod is equipped with the loop, the outer side fixedly connected with the net frame of loop, the upper end of net frame is bonded with the velvet band, the upper end fixedly connected with the viewing platform subassembly of bottom plate, the inside of viewing platform subassembly is installed with locking mechanism, and the inside of viewing platform subassembly includes the placing table and is equipped with the air hole, the inside of air hole is installed with long air inlet pipe, the inside of air hole is installed with short air inlet pipe, and locking mechanism includes the sleeve, the outer side welded fixedly with the fixed link of sleeve, the inside of sleeve is inserted with the breather pipe, and the breather pipe penetrates and connects the limit pivot, in the utility model, can detect when to surfacing welding protruding position of wear -resistant roller surface, introduce airflow visual viewing mechanism, the distribution and obstruction situation of invisible airflow are converted into clear visual signal.

Description

Technical Field

[0001] This utility model relates to the field of coal mill technology, specifically to a repair component based on the overlay welding of protruding parts on the surface of the wear-resistant roller of a coal mill. Background Technology

[0002] A coal mill is a specialized piece of equipment that grinds raw coal into pulverized coal. It is widely used in industrial fields such as thermal power plants, cement plants, and steel plants. It crushes and grinds raw coal into pulverized coal that meets the requirements for combustion particle size by squeezing, impacting, or rolling the coal blocks through high-speed rotating grinding components. At the same time, it uses hot air to dry the pulverized coal so that the fuel can be fully burned in the boiler and improve energy utilization efficiency.

[0003] In coal mills, wear-resistant rollers are one of the core grinding components. They are usually made of high-chromium cast iron, nickel hard cast iron, or wear-resistant alloys with overlay welding. They directly participate in the crushing and grinding of raw coal. Their surface is usually treated with overlay welding to enhance their gripping force and crushing effect on coal blocks. Through overlay welding repair technology, "grinding and repairing at the same time" can be achieved, which greatly reduces maintenance costs and downtime.

[0004] However, in actual repair operations, it is difficult to accurately locate the area to be repaired, and it is difficult to verify the degree of repair in real time during the repair process. There are even problems that the repair position needs to be searched again due to positioning deviation during the repair, which is time-consuming and labor-intensive. Therefore, in order to address the above problems, a repair component based on the surface overlay welding of protruding parts of the wear-resistant roller of the coal mill is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a repair component based on the overlay welding of protruding parts on the surface of the wear-resistant roller of a coal mill, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A repair component for protruding parts welded onto the surface of a wear-resistant roller in a coal mill includes a base plate, a support rod, an adjusting cap, and the roller body. A collar is fitted around the outside of the support rod, and a mesh frame is fixedly connected to the outside of the collar. A soft fleece is adhered to the upper end of the mesh frame. An inspection platform assembly is fixedly connected to the upper end of the base plate. A locking mechanism is installed inside the inspection platform assembly. The inspection platform assembly includes a placement platform with an air hole on its inner side. A long air inlet pipe and a short air inlet pipe are installed inside the air hole. The locking mechanism includes a sleeve with a fixing rod welded to its outer side. A vent pipe is inserted into the inner side of the sleeve, and a limit shaft is connected through the vent pipe. A rotating block is rotatably connected to the outer side of the limit shaft. A sliding tube is slidably connected to the inner side of the sleeve, and an anti-detachment block is welded to the upper end of the sliding tube.

[0008] As a further optimization of this utility model, the following features are provided: support rods are fixedly connected to the four corner areas at the upper end of the base plate, and adjustment caps are threadedly connected to the outer side of the support rods, with the upper end face of the adjustment caps fitting against the bottom end face of the collar.

[0009] As a further optimization of this utility model, the inspection platform assembly has a grinding roller body placed on its upper end, a gap is provided between the grinding roller body and the mesh frame, and the grinding roller body and the mesh frame are parallel to each other.

[0010] As a further optimization of this utility model, the following features are provided: multiple air holes are provided and are evenly and equidistantly distributed in a ring array on the inner side of the placement platform; the shape of each air hole is composed of a section of cylinder and a section of frustum; and the inner side of the placement platform is connected to the outside through the air holes.

[0011] As a further optimization of this utility model, the long air inlet pipe and the short air inlet pipe are each equipped with a one-way air inlet nozzle at one end outside the placement platform, the end of the long air inlet pipe inside the placement platform is directly below the sleeve, and an arc-shaped groove is provided at the top inside the placement platform.

[0012] As a further optimization of this utility model, the following features are provided: a gap is provided between the outer side of the sliding tube and the inner side of the sleeve; the lateral projection of the sliding tube is an isosceles trapezoid; the top of the anti-detachment block is arc-shaped; and the bottom of the anti-detachment block is attached to the upper end of the sleeve.

[0013] As a further optimization of this utility model, the inner side of the sleeve is connected to the inside of the rotating block through a vent pipe, an airbag rubber ring is bonded to the outer side of the rotating block, a placement platform is fixedly connected to the bottom end of the limiting rotating shaft, the vertical projection shape of the rotating block is elliptical, and the rotating block and the limiting rotating shaft are eccentrically set.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the inspection platform assembly, the mesh frame, and the soft cloth belt enable the introduction of an airflow visualization inspection mechanism when inspecting the protruding parts welded to the surface of the wear-resistant roller. This transforms the invisible airflow distribution and obstruction into clearly visible visual signals. Furthermore, during the grinding and repair process, the visualization system provides a dynamic feedback mechanism. As the protruding parts are gradually ground down, their covering effect on the air holes below weakens, and the soft cloth belt in the corresponding area will return from a static state to normal movement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the inspection platform assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the locking mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the installation position of the sliding tube of this utility model.

[0021] In the diagram: 1. Base plate; 2. Support rod; 3. Adjusting cap; 4. Collar; 5. Space frame; 6. Soft fleece belt;

[0022] 7. Inspection stand assembly; 71. Placement platform; 72. Air vent; 73. Long air inlet pipe; 74. Short air inlet pipe;

[0023] 8. Locking mechanism; 81. Sleeve; 82. Fixing rod; 83. Vent pipe; 84. Limiting pivot; 85. Rotating block; 86. Sliding tube; 87. Anti-detachment block;

[0024] 9. Grinding roller body. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Please see Figures 1-5 This utility model provides a technical solution:

[0028] The repair component based on the surface overlay of the wear-resistant roller of the coal mill includes a base plate 1, a support rod 2, an adjusting cap 3, and a grinding roller body 9. A collar 4 is sleeved on the outside of the support rod 2, and a mesh frame 5 is fixedly connected to the outside of the collar 4. A soft velvet strip 6 is glued to the upper end of the mesh frame 5. An inspection platform assembly 7 is fixedly connected to the upper end of the base plate 1. A locking mechanism 8 is installed inside the inspection platform assembly 7. The inspection platform assembly 7 includes a placement platform 71. An air hole 72 is opened inside the placement platform 71. A long air inlet pipe 73 and a short air inlet pipe 74 are installed inside the air hole 72. The locking mechanism 8 includes a sleeve 81. A fixing rod 82 is welded and fixed to the outside of the sleeve 81. A vent pipe 83 is inserted into the inside of the sleeve 81. A limit shaft 84 is connected through the vent pipe 83. A rotating block 85 is rotatably connected to the outside of the limit shaft 84. A sliding tube 86 is slidably connected to the inside of the sleeve 81. An anti-detachment block 87 is welded and fixed to the upper end of the sliding tube 86.

[0029] As a further implementation of this scheme, support rods 2 are fixedly connected to the four corner areas of the upper end of the base plate 1. Adjusting caps 3 are threadedly connected to the outside of the support rods 2. The upper end face of the adjusting caps 3 is in contact with the bottom end face of the collar 4. Through the connection and cooperation between the adjusting caps 3 and the support rods 2, the relative position of the adjusting caps 3 and the support rods 2 can be changed, thereby changing the support height of the adjusting caps 3 on the collar 4.

[0030] As a further implementation of this solution, a grinding roller body 9 is placed on the upper end of the inspection stand assembly 7. A gap is provided between the grinding roller body 9 and the mesh frame 5, and the grinding roller body 9 and the mesh frame 5 are parallel to each other. The gap provided between the grinding roller body 9 and the mesh frame 5 can prevent the mesh frame 5 from contacting the grinding roller body 9 and causing deformation, so that the spacing between the soft velvet strips 6 bonded on the mesh frame 5 is uneven.

[0031] As a further implementation of this solution, multiple air holes 72 are provided and are evenly and equidistantly distributed in a ring array inside the placement platform 71. The shape of the air holes 72 consists of a section of cylinder and a section of frustum. The inside of the placement platform 71 is connected to the outside through the air holes 72. The shape of the air holes 72 increases the flow rate of the air entering from its bottom end after being guided by it, thereby better cooperating with the other components.

[0032] As a further implementation of this solution, one-way air inlets are installed at the ends of both the long air inlet pipe 73 and the short air inlet pipe 74 located outside the placement platform 71. The end of the long air inlet pipe 73 inside the placement platform 71 is directly below the sleeve 81. An arc-shaped groove is formed at the top of the interior of the placement platform 71. A gap is provided between the outer side of the sliding pipe 86 and the inner side of the sleeve 81. The lateral projection of the sliding pipe 86 is an isosceles trapezoid. The top of the anti-detachment block 87 is arc-shaped, and the bottom of the anti-detachment block 87 is attached to the top of the sleeve 81. The inner side of the sleeve 81 is connected to the inside of the rotating block 85 via the vent pipe 83. An airbag rubber ring is bonded to the outer side of the rotating block 85. A placement platform 71 is fixedly connected to the bottom end of the limiting shaft 84. The vertical projection shape of the rotating block 85 is elliptical. The rotating block 85 and the limiting shaft 84 are eccentrically positioned. One-way air inlets installed on the long air inlet pipe 73 and the short air inlet pipe 74 prevent gas supplied to the placement platform 71 from flowing back to the outside through them. One end of the long air inlet pipe 73 inside the placement platform 71 is... The placement of the sleeve 81 directly below the sleeve allows the gas supplied through the long air inlet pipe 73 to enter the sleeve 81 first, pushing the sliding tube 86, which is slidably disposed within the sleeve 81, to slide upwards. This allows the gas to first enter the gap between the outer side of the sliding tube 86 and the inner side of the sleeve 81, and then be supplied to the rotating block 85 through the vent pipe 83. The shape of the rotating block 85 and its interaction with the limiting rotating shaft 84 enable it to better adapt to grinding roller bodies 9 with different inner diameters. Combined with the airbag rubber ring bonded to its outer side, it can produce a stable and flexible expansion and positioning effect on the grinding roller body 9. The shape of the sliding tube 86 makes it easy to be lifted when subjected to airflow from the bottom. When it is not subjected to the lifting force of the airflow from the bottom, the force generated by the gas flowing back from the vent pipe 83 on its side can drive the anti-detachment block 87 to press firmly onto the sleeve 81, thus preventing the backflowing gas from flowing out from the gap between the outer side of the sliding tube 86 and the inner side of the sleeve 81.

[0033] Working process: When using the device, firstly, the grinding roller body 9 is hoisted onto the upper end of the placement platform 71, with the rotating block 85 positioned inside the grinding roller body 9. Then, the rotating block 85 is rotated until it rotates around the limiting shaft 84 at a certain angle and contacts the inner wall of the grinding roller body 9. The rotating block 85 is then locked. Next, the adjusting cap 3 is screwed onto the support rod 2 from the top, ensuring that the relative positions of each adjusting cap 3 and the support rod 2 are the same. Then, the collar 4 is fitted onto the support rod 2 from top to bottom, so that the collar 4 is supported by the adjusting cap 3. At this time, gas is first supplied to the interior of the placement platform 71 through the one-way air inlet nozzle installed at one end of the long air inlet pipe 73 outside the placement platform 71. Since the end of the long air inlet pipe 73 inside the placement platform 71 is positioned within the collar... Directly below tube 81, the gas entering the placement platform 71 first enters the sleeve 81. At this time, the gas being transported upward enters the sliding tube 86 that is slidably installed inside the sleeve 81, and also enters the anti-detachment block 87 connected to the sliding tube 86. The gas pushes the sliding tube 86 upward. When the sliding tube 86 moves upward a certain distance, it will no longer block the input of gas from the sleeve 81 into the vent pipe 83. At this time, the gas enters the rotating block 85 through the vent pipe 83, causing the airbag rubber ring bonded to the outside of the rotating block 85 to bulge, thereby stably limiting the position of the grinding roller body 9. When the long air inlet pipe 73 stops transporting gas, the sliding tube 86 falls back, blocking the flow of gas between the sleeve 81 and the vent pipe 83 again.

[0034] Next, gas is supplied to the interior of the placement platform 71 through a one-way air inlet installed at one end of the short air inlet pipe 74 on the outside of the placement platform 71. The gas entering the placement platform 71 impacts the arc-shaped groove at the top of the placement platform 71 and disperses to the surroundings. It is then guided by the air holes 72 and flows out to the outside. The air flowing out of the air holes 72 blows upwards the soft cloth strip 6 attached to the upper end of the mesh frame 5. Since part of the air holes 72 is covered by the grinding roller body 9, the airflow pattern is visualized by the difference in the shape of the soft cloth strip 6. When there are protruding parts welded on the surface of the grinding roller body 9, the specific parts can be seen intuitively by the shape of the soft cloth strip 6, saving a lot of inspection time. When grinding the protruding parts, it can be determined whether the grinding is in place by observing the intermittently penetrating soft cloth strip 6. At the same time, when grinding the protruding parts, the air blown out of the air holes 72 can prevent the residue from falling into the interior of the placement platform 71 and affecting the next use of the device.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A repair assembly for protruding parts welded onto the surface of a wear-resistant roller in a coal mill, comprising a base plate (1), a support rod (2), an adjusting cap (3), and a roller body (9), characterized in that: The support rod (2) is fitted with a collar (4) on the outside, and a mesh frame (5) is fixedly connected to the outside of the collar (4). A soft velvet strip (6) is glued to the upper end of the mesh frame (5). An inspection platform assembly (7) is fixedly connected to the upper end of the base plate (1). A locking mechanism (8) is installed inside the inspection platform assembly (7). The inspection platform assembly (7) includes a placement platform (71). An air hole (72) is opened inside the placement platform (71). A long air inlet pipe (73) is installed inside the air hole (72). A short air inlet pipe (74) is installed inside the air hole (72). The locking mechanism (8) includes a sleeve (81), a fixing rod (82) is welded and fixed on the outside of the sleeve (81), a vent pipe (83) is inserted into the inside of the sleeve (81), the vent pipe (83) is connected through a limit pivot (84), a rotating block (85) is rotatably connected to the outside of the limit pivot (84), a sliding tube (86) is slidably connected to the inside of the sleeve (81), and an anti-detachment block (87) is welded and fixed at the upper end of the sliding tube (86).

2. The repair component based on the weld overlay protrusion on the surface of the wear-resistant roller of a coal mill according to claim 1, characterized in that: The four corner areas of the upper end of the base plate (1) are respectively fixedly connected to support rods (2), and the outer side of the support rods (2) is threaded with an adjusting cap (3). The upper end face of the adjusting cap (3) is in contact with the bottom end face of the collar (4).

3. The repair component based on the weld overlay protrusion on the surface of the wear-resistant roller of a coal mill according to claim 1, characterized in that: The inspection stand assembly (7) has a grinding roller body (9) placed on its upper end. There is a gap between the grinding roller body (9) and the mesh frame (5), and the grinding roller body (9) and the mesh frame (5) are parallel to each other.

4. The repair component based on the weld overlay protrusion on the surface of the wear-resistant roller of a coal mill according to claim 1, characterized in that: The air holes (72) are provided in multiple ways and are evenly distributed in a ring array on the inner side of the placement platform (71). The shape of the air holes (72) is composed of a section of cylinder and a section of frustum. The inner side of the placement platform (71) is connected to the outside through the air holes (72).

5. The repair component based on the weld overlay protrusion on the surface of the wear-resistant roller of a coal mill according to claim 1, characterized in that: The long air intake pipe (73) and the short air intake pipe (74) are each equipped with a one-way air intake nozzle at one end outside the placement platform (71). The end of the long air intake pipe (73) inside the placement platform (71) is directly below the sleeve (81). An arc-shaped groove is provided at the top of the interior of the placement platform (71).

6. The repair component based on the weld overlay protrusion on the surface of the wear-resistant roller of a coal mill according to claim 1, characterized in that: A gap is provided between the outer side of the sliding tube (86) and the inner side of the sleeve (81). The horizontal projection of the sliding tube (86) is an isosceles trapezoid. The top of the anti-detachment block (87) is arc-shaped. The bottom of the anti-detachment block (87) is attached to the upper end of the sleeve (81).

7. The repair component based on the weld overlay protrusion on the surface of the wear-resistant roller of a coal mill according to claim 1, characterized in that: The inner side of the sleeve (81) is connected to the inside of the rotating block (85) through the vent pipe (83). An airbag rubber ring is bonded to the outer side of the rotating block (85). A placement platform (71) is fixedly connected to the bottom end of the limiting rotating shaft (84). The vertical projection shape of the rotating block (85) is elliptical. The rotating block (85) and the limiting rotating shaft (84) are eccentrically set.

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