Coking coal charging and leveling rod and method

Abstract

The present application provides a kind of coke coal charging flat coal rod and flat coal method, the front end surface of the flat coal rod is arc surface, the lower part of the arc surface is fixedly installed with roller, and the roller is rotatably installed with rolling roller;The front end of the flat coal rod is provided with coal scraping plate and shaft sleeve;The shaft sleeve is fixedly installed on the flat coal rod, and the coal scraping plate is arranged along the width direction of the flat coal rod and one end is fixedly installed with rotating shaft, the rotating shaft is rotatably installed on the shaft sleeve;The two ends of the rotating shaft are respectively provided with connecting ear ring;The connecting ear ring is fixedly installed on the rotating shaft, one end is fixedly connected to the traction chain of motor output end, the other end is connected to the connecting ear ring, and the motor is used to drive the traction chain to control the angle α between the coal scraping plate and vertical direction.The technical scheme of the present application can reduce the coal material taken out when the flat coal rod is withdrawn, and compact the coal material loaded in the carbonization chamber after flat coal.

Description

Technical Field

[0001] This invention relates to the field of coking coal blending technology, and more particularly to a coking coal charging leveling rod and a leveling method. Background Technology

[0002] In the coking process of top-charged coke ovens, a leveling rod is installed on the coke pusher to ensure uniform coal loading inside the carbonization chamber. The leveling rod enters the carbonization chamber via a transmission mechanism and levels the coal inside, a process commonly known as "coal leveling." The leveling rod is typically a box-shaped frame with vertical tie plates distributed on both sides and ends. These tie plates move horizontally within the carbonization chamber as the leveling rod moves, leveling the coal pile left after loading, thereby increasing the amount of coal charged into the coke oven and improving coke production.

[0003] However, since the end of the leveling rod is generally vertical, it is easily obstructed by protruding corners during the leveling process, causing uneven leveling. Furthermore, when the leveling rod retracts from the carbonization chamber, it carries some coking coal out, affecting charging efficiency. Typically, a 6m coke oven charges 28.5 tons of dry coal per hole, and a 7m coke oven charges 41.2 tons of dry coal per hole. Additionally, the leveling rod is usually fixed to the coke pusher and can only move horizontally; it cannot apply pressure vertically. Therefore, the leveling rod can only spread the coal, resulting in relatively loose coal in the carbonization chamber. The coal can only be compacted by its own weight, causing uneven stress on coal at different heights and uneven coke quality. Because the leveling rod's own weight is entirely loaded on the end connected to the coke pusher, and the high temperature inside the carbonization chamber, long-term use can easily cause fatigue deformation of the iron parts of the leveling rod, leading to bending and affecting its service life. Summary of the Invention

[0004] In view of the technical problem that the existing coal leveling rod cannot achieve both compaction and smooth coal leveling, in order to ensure the smooth operation of the coal leveling rod during the coal leveling process, so that the coal in the carbonization chamber is loaded as evenly and evenly as possible, and to reduce the amount of coal carried out when the coal leveling rod is withdrawn, while also ensuring the coal in the carbonization chamber is compacted after leveling, this invention provides a coking coal leveling rod and a coal leveling method.

[0005] The technical means employed in this invention are as follows:

[0006] A coking coal charging leveling rod, wherein the front end face of the leveling rod is an arc-shaped surface, a roller is fixedly installed at the lower part of the arc-shaped surface, and a rolling roller is rotatably installed on the roller;

[0007] The front end of the coal leveling rod is provided with a coal scraper and a bushing; the bushing is fixedly installed on the coal leveling rod, the coal scraper is arranged along the width direction of the coal leveling rod and a rotating shaft is fixedly installed at one end, and the rotating shaft is rotatably installed on the bushing.

[0008] Connecting lugs are provided at both ends of the rotating shaft. The connecting lugs are fixedly installed on the rotating shaft, with one end fixedly connected to the traction chain at the output end of the motor and the other end connected to the connecting lug. The motor is used to drive the traction chain to pull the connecting lug and drive the rotating shaft to rotate, thereby controlling the angle α between the coal scraper and the vertical direction. The width of the coal scraper is greater than the distance between the axis of the rotating shaft and the surface of the coal seam. When the traction chain is under force, it can effectively reduce the vibration of the leveling rod.

[0009] Furthermore, a reinforcing rib is fixedly installed at the front end of the coal scraper.

[0010] Furthermore, the contact surface between the scraper plate and the coal seam surface has a multi-tooth structure.

[0011] Furthermore, the rotating shaft is equipped with a blocking valve to limit the rotation angle.

[0012] Furthermore, the surface of the rolling roller is uniformly provided with a number of protrusions along the circumference, and the included angle between two adjacent protrusions is 10 to 50°.

[0013] Furthermore, the angle α between the scraper plate and the vertical direction ranges from 5° to the angle between the tangent of the arc surface passing through the center point of the rotating bushing and the vertical direction.

[0014] Furthermore, it includes two traction chains and two motors, each traction chain being connected to one motor and one connecting lug. When controlling the angle α between the coal scraper and the vertical direction, the two motors simultaneously drive the corresponding traction chain to work.

[0015] This invention also provides a coal leveling method, which uses the above-mentioned coking coal leveling rod, specifically including the following steps:

[0016] Step 1: Before the coal leveling rod enters the coke oven carbonization chamber, the motor is turned on to make the output end of the motor rotate, thereby winding the traction chain. The traction chain pulls the connecting lug to drive the rotating shaft to rotate, so that the coal scraper rotates to an angle α between it and the vertical direction greater than 90°, and then the motor is turned off.

[0017] Step 2: During the process of the coal leveling rod entering the coke oven carbonization chamber, the coal is leveled by the front end of the leveling rod and the scraper plate, and the rolling roller rolls along the surface of the coal layer after leveling to compact the coal. When the leveling rod enters the deepest part of the coke oven carbonization chamber, the motor is turned on, the wound traction chain is released, and the scraper plate rotates, reducing the angle α between it and the vertical direction until it contacts the surface of the coal layer. At this time, the traction chain is no longer under force. The leveling rod withdraws from the deepest part of the coke oven carbonization chamber, and the rolling roller rolls along the surface of the coal layer after leveling to compact the coal.

[0018] Step 3: Repeat steps 1 to 2 2 to 5 times until the coal seam surface is flat. Turn on the motor, and the output end of the motor will rotate to wind the traction chain, causing the coal scraper to rotate. The angle α between the scraper and the vertical direction will gradually increase until the lower end of the coal scraper leaves the coal seam surface. Turn off the motor, and then remove the coal leveling rod from the coke oven carbonization chamber. The coal leveling operation is now complete.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The coking coal charging leveling rod and method provided by this invention, compared with traditional leveling rods and methods, not only reduce the vibration of the leveling rod and the friction between the leveling rod and the coal and furnace wall, preventing coal from being carried out and touching the furnace wall during retraction, but also allow the scraper to effectively level and compact the coal charged in the carbonization chamber after leveling. In particular, the adjustment of the convex angle of the rolling roller for coking coal of different fineness effectively improves the degree of coal compaction, thereby increasing the coal charging capacity per hole of the carbonization chamber by more than 1.5%, increasing coke production, and improving coke quality.

[0021] Based on the above reasons, this invention can be widely promoted in the field of coking coal blending. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram showing the state of the scraper plate when the coal leveling rod enters the carbonization chamber according to the present invention.

[0024] Figure 2 This is a top view schematic diagram of the coal scraper structure described in this invention.

[0025] Figure 3 This is a side view of the coal scraper structure described in this invention.

[0026] Figure 4 This is a schematic diagram of the rolling roller structure with protrusions described in this invention.

[0027] Figure 5 This is a schematic diagram of the state of the scraper plate when the coal leveling rod is withdrawn from the carbonization chamber according to the present invention.

[0028] In the diagram: 1. Coal leveling rod; 2. Traction chain; 3. Coal scraper; 4. Roller; 5. Rolling roller; 6. Connecting lug; 7. Blocking valve; 8. Rotating shaft; 9. Rotating bushing; 10. Reinforcing rib; 11. Protrusion; 12. Coal material; 13. Carbonization chamber. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] 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 scope of exemplary embodiments according to the invention. 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.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0033] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0035] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0036] like Figure 1-4 As shown, the present invention provides a coking coal leveling rod 1. The front end face of the leveling rod 1 is an arc-shaped surface. A roller 4 is fixedly installed on the lower part of the arc-shaped surface. A rolling roller 5 is rotatably installed on the roller 4. The lower end face of the rolling roller 5 is on the same plane as the lower end face of the leveling rod 1. It can roll along the surface of the coal layer during the leveling process.

[0037] The front end of the coal leveling rod 1 is provided with a coal scraper 3 and a bushing 9; the bushing 9 is fixedly installed on the coal leveling rod 1, the coal scraper 3 is arranged along the width direction of the coal leveling rod 1 and a rotating shaft 8 is fixedly installed at one end, the rotating shaft 8 is rotatably installed on the bushing 9, so that the coal scraper 3 can rotate relative to the coal leveling rod 1 in the vertical direction.

[0038] The rotating shaft 8 is provided with connecting lugs 6 at both ends; the connecting lugs 6 are fixedly installed on the rotating shaft 8, one end of which is fixedly connected to the traction chain 2 at the output end of the motor, and the other end is connected to the connecting lugs 6. The motor is used to drive the traction chain 2 (by rotating the output end, the traction chain 2 is wound or unwound on the output end) to pull the connecting lugs 6 to drive the rotating shaft 8 to rotate, thereby controlling the angle α between the coal scraper 3 and the vertical direction; the motor is set on the coke pusher car; the width of the coal scraper 3 is greater than the distance between the axis of the rotating shaft 8 and the surface of the coal seam.

[0039] Furthermore, the scraper plate 3 has a bottom-heavy and top-light structure. A reinforcing rib 10 is fixedly installed at the front end of the scraper plate 3 to increase the weight at the front end. When the scraper plate 3 retracts, it can scrape the surface coal material flat under its own weight and the traction force of the leveling rod 1.

[0040] Furthermore, the contact surface between the scraper plate 3 and the coal seam surface has a multi-tooth structure, which can reduce the resistance during the scraping process of the scraper plate 3, prevent the coal material 12 from being carried out, and at the same time scrape the coal material 12 flat.

[0041] Furthermore, the rotating shaft 8 is equipped with a blocking valve 7 to limit the rotation angle, which is used to prevent the coal scraper 3 from rotating too much under the traction of the traction chain 2.

[0042] Furthermore, the surface of the rolling roller 5 is uniformly provided with a plurality of protrusions 11 along the circumference. On the one hand, the protrusions 11 can increase the compaction effect of the coal leveling rod 1 on the coal material. On the other hand, the protrusions 11 can prevent the rolling roller 5 from not rolling due to slippage during the movement of the coal leveling rod 1. The included angle between two adjacent protrusions is 10 to 50°.

[0043] Furthermore, the number of protrusions 11 depends on the fineness of the coal 12: when the fineness of the coal 12 is <72%, the included angle between two adjacent protrusions 11 is 45°; when the fineness of the coal 12 is between 72% and 76%, the included angle between two adjacent protrusions 11 is 30°; and when the fineness of the coal 12 is >76%, the included angle between two adjacent protrusions 11 is 10°.

[0044] Furthermore, the angle α between the scraper plate 3 and the vertical direction ranges from 5° to the angle between the tangent of the arc-shaped surface passing through the axis of the rotating sleeve 9 and the vertical direction (e.g., ...). Figure 1 (As shown).

[0045] Furthermore, it includes two traction chains 2 and two motors, each traction chain 2 is connected to one motor and one connecting lug 6, and when controlling the angle α between the coal scraper plate 3 and the vertical direction, the two motors simultaneously drive the corresponding traction chain 2 to work.

[0046] Furthermore, it includes a traction chain 2 and a motor, one end of the traction chain 2 is fixedly connected to the output end of the motor, and the other end is connected to the two connecting earrings 6 respectively through pulleys.

[0047] like Figure 5 As shown, the present invention also provides a coal leveling method, which uses the above-mentioned coking coal leveling rod, specifically including the following steps:

[0048] Step 1: Before the coal leveling rod 1 enters the coke oven carbonization chamber 13, the motor is turned on to make the output end of the motor rotate, thereby winding the traction chain 2. The traction chain 2 pulls the connecting lug 6 to drive the rotating shaft 8 to rotate, so that the coal scraper 3 rotates to an angle α between it and the vertical direction greater than 90°, and then the motor is turned off.

[0049] Step 2: During the process of the coal leveling rod 1 entering the coke oven carbonization chamber 13, the coal is leveled by the front end of the coal leveling rod 1 and the coal scraper 3, and the rolling roller 5 rolls along the surface of the coal layer after leveling to compact the coal.

[0050] When the coal leveling rod 1 enters the deepest part of the coke oven carbonization chamber 13, the motor is turned on, the wound traction chain 2 is released, and the coal scraper 3 rotates, the angle α between it and the vertical direction gradually decreases until it contacts the coal seam surface. At this time, the traction chain 2 is not under force.

[0051] The coal leveling rod 2 exits from the deepest part of the coke oven carbonization chamber 13, and the rolling roller 5 rolls along the coal seam surface after leveling to compact the coal material; the coal scraper 3 with a multi-tooth structure can scrape and compact the coal seam surface after leveling again under the action of the reinforcing rib 10 and its own weight.

[0052] Step 3: Repeat steps 1 to 2 2 to 5 times until the coal seam surface is flat. Turn on the motor and the output end of the motor rotates and winds the traction chain 2, causing the coal scraper 3 to rotate. The angle α between the scraper 3 and the vertical direction gradually increases until the lower end of the coal scraper 3 leaves the coal seam surface. Turn off the motor and then remove the leveling rod 1 from the coke oven carbonization chamber 13. The leveling operation is over.

[0053] Using the coking coal charging leveling rod and leveling method provided by this invention, when the coal scraper 3 enters with the leveling rod 1, it together with the front end of the leveling rod 1 to push the coal tip flat. During the coal leveling process, the coal scraper 3 contacts the coal bed surface as the leveling rod 1 exits. Until the leveling rod 1 is completely exited from the carbonization chamber for the last time, the coal scraper 3 moves away from the coal bed surface to ensure that the coal bed surface is leveled, while avoiding scraping the coking oven leveling rod doorway during exit.

[0054] The following describes the coal leveling rod and coal leveling method provided by the present invention in further detail with reference to specific embodiments 1-3.

[0055] Example 1

[0056] For a 6m top-loading coke oven, based on the technical solution of the coking coal leveling rod provided by the present invention, the leveling rod 1 provided in this embodiment has a weight of 100kg for the scraper plate 3 and the reinforcing rib 10, a coal fineness of 77% for the coal material 12, an included angle of 10° between two adjacent protrusions 11 on the surface of the rolling roller 5, and a maximum angle α between the scraper plate 3 and the vertical direction of 120°.

[0057] By using the coal leveling rod provided in this embodiment to implement the coal leveling method of the present invention, repeating the coal leveling operation three times can increase the coal loading capacity by 0.5t, achieving a bulk density of 0.78t / m³. 3 The coal loading increased by 1.75%, the coke reactivity decreased by 2.0%, and the post-reaction strength increased by 3.0%.

[0058] Example 2

[0059] For a 7m top-loading coke oven, based on the technical solution of the coking coal charging leveling rod provided by the present invention, the leveling rod 1 provided in this embodiment has a coal scraper 3 and a reinforcing rib 10 with a weight of 150kg, a coal material 12 with a fineness of 71%, an included angle between two adjacent protrusions 11 on the surface of the rolling roller 5 with a value of 45°, and a maximum angle α between the coal scraper 3 and the vertical direction with a value of 145°.

[0060] By using the coal leveling rod provided in this embodiment to implement the coal leveling method provided by the present invention, and repeating the coal leveling operation four times, an additional 0.8t of coal can be loaded, and the bulk density can reach 0.79t / m³. 3 The coal loading increased by 1.94%, the coke reactivity decreased by 1.0%, and the post-reaction strength increased by 2.3%.

[0061] Example 3

[0062] For a 6m top-loading coke oven, based on the technical solution of the coking coal charging leveling rod provided by the present invention, the leveling rod 1 provided in this embodiment has a weight of 200kg for the scraper plate 3 and the reinforcing rib 10, a coal fineness of 74% for the coal material 12, an included angle of 30° between two adjacent protrusions 11 on the surface of the rolling roller 5, and a maximum angle α between the scraper plate 3 and the vertical direction of 95°.

[0063] By using the coal leveling rod provided in this embodiment to implement the coal leveling method provided by the present invention, and repeating the coal leveling operation three times, an additional 0.45t of coal can be loaded, and the bulk density can reach 0.80t / m³. 3 The coal loading increased by 1.57%, the coke reactivity decreased by 2.5%, and the post-reaction strength increased by 2.4%.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coking coal charging leveling rod, characterized in that, The front end face of the coal leveling rod is an arc-shaped surface, and a roller is fixedly installed at the lower part of the arc-shaped surface. A rolling roller is rotatably installed on the roller. The front end of the coal leveling rod is provided with a coal scraper and a bushing; the bushing is fixedly installed on the coal leveling rod, the coal scraper is arranged along the width direction of the coal leveling rod and a rotating shaft is fixedly installed at one end, and the rotating shaft is rotatably installed on the bushing. Connecting lugs are provided at both ends of the rotating shaft; the connecting lugs are fixedly installed on the rotating shaft, one end of the traction chain is fixedly connected to the motor output end, and the other end of the traction chain is connected to the connecting lugs. The motor is used to drive the traction chain to pull the connecting lugs and drive the rotating shaft to rotate, thereby controlling the angle α between the coal scraper and the vertical direction; the width of the coal scraper is greater than the distance between the axis of the rotating shaft and the surface of the coal seam.

2. The coking coal charging leveling rod according to claim 1, characterized in that, The front end of the scraper plate is fixedly equipped with reinforcing ribs.

3. The coking coal charging leveling rod according to claim 1, characterized in that, The contact surface between the scraper and the coal seam surface has a multi-tooth structure.

4. The coking coal charging leveling rod according to claim 1, characterized in that, The rotating shaft is equipped with a blocking valve that limits the rotation angle.

5. The coking coal charging leveling rod according to claim 1, characterized in that, The surface of the rolling roller is uniformly provided with a number of protrusions along the circumference, and the included angle between two adjacent protrusions is 10 to 50°. Furthermore, when the coal fineness is <72%, the included angle between two adjacent protrusions is 45°; when the coal fineness is between 72% and 76%, the included angle between two adjacent protrusions is 30°; and when the coal fineness is >76%, the included angle between two adjacent protrusions is 10°.

6. The coking coal charging leveling rod according to claim 1, characterized in that, The angle α between the scraper plate and the vertical direction is in the range of 5° to the angle between the tangent of the arc surface through the center point of the bushing and the vertical direction.

7. The coking coal charging leveling rod according to claim 1, characterized in that, It includes two traction chains and two motors. Each traction chain is connected to one motor and one connecting lug. When the angle α between the coal scraper and the vertical direction is controlled, the two motors simultaneously drive the corresponding traction chain to work.

8. A method for leveling coal, characterized in that, The coking coal charging leveling rod as described in any one of claims 1-7 specifically includes the following steps: Step 1: Before the coal leveling rod enters the coke oven carbonization chamber, the motor is turned on to make the output end of the motor rotate, thereby winding the traction chain. The traction chain pulls the connecting lug to drive the rotating shaft to rotate, so that the coal scraper rotates to an angle α between it and the vertical direction greater than 90°, and then the motor is turned off. Step 2: During the process of the coal leveling rod entering the coke oven carbonization chamber, the coal is leveled by the front end of the leveling rod and the scraper plate, and the rolling roller rolls along the surface of the coal layer after leveling to compact the coal. When the leveling rod enters the deepest part of the coke oven carbonization chamber, the motor is turned on, the wound traction chain is released, and the scraper plate rotates, reducing the angle α between it and the vertical direction until it contacts the surface of the coal layer. At this time, the traction chain is no longer under force. The leveling rod withdraws from the deepest part of the coke oven carbonization chamber, and the rolling roller rolls along the surface of the coal layer after leveling to compact the coal. Step 3: Repeat steps 1 to 2 2 to 5 times until the coal seam surface is flat. Turn on the motor, and the output end of the motor will rotate to wind the traction chain, causing the coal scraper to rotate. The angle α between the scraper and the vertical direction will gradually increase until the lower end of the coal scraper leaves the coal seam surface. Turn off the motor, and then remove the coal leveling rod from the coke oven carbonization chamber. The coal leveling operation is now complete.

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