Auxiliary tool for quickly replacing blast furnace coal lance

Abstract

The utility model relates to an auxiliary tool for quickly replacing a blast furnace coal lance, which comprises a tile sleeve, one side of the tile sleeve is provided with an opening with a preset width, the upper part of the interior of the tile sleeve is used for accommodating the coal lance, the lower part of the interior of the tile sleeve is used for accommodating a wedge, and the wedge is of a regular structure with a gradually increased sectional area. And a groove matched with the outer diameter of a coal gun is formed along one side of the wedge. When the worn coal gun is replaced, the coal gun and the valve on the coal injection pipeline are closed, the metal hose is detached, the coal gun is pulled out, the tile sleeve is sleeved on the coal gun, the modified wedge is inserted, the wedge is hit by a sledge hammer to quickly pull out the coal gun, the marble valve is automatically closed after the coal gun is pulled out, and then the coal gun is replaced by a new coal gun. The device can realize online replacement, is simple in process and convenient to operate, saves labor cost, and reduces the cost of spare parts.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace coal lance replacement technology, and more specifically, to an auxiliary tool for quickly replacing blast furnace coal lances. Background Technology

[0002] Currently in China, most blast furnace smelting injection processes involve pulverized coal injection. This is achieved by inserting a coal lance into the fire tube. Because the lance is subjected to high temperature, high pressure, and the scouring effect of pulverized coal, it inevitably becomes damaged after a period of use, requiring online replacement. Technologies such as "An Online Replacement Device for Blast Furnace Pulverized Coal Lance" (201921658818.7) and "A Ball Valve for Blast Furnace Coal Lance" (201420539875.4) address the connection between the lance and the blast furnace during lance replacement. However, these methods still involve using pipe wrenches or large wrenches to clamp the lance and manually pulling it out, or using a sledgehammer to strike the pipe wrench. This method is time-consuming and labor-intensive, and the frequent damage to the pipe wrench when struck with a sledgehammer increases costs. Utility Model Content

[0003] In response to the aforementioned technical problems, an auxiliary tool for quickly changing blast furnace coal guns is provided.

[0004] The technical means adopted in this utility model are as follows:

[0005] An auxiliary tool for quickly changing blast furnace coal guns includes a sleeve with an opening of a preset width on one side. The upper part of the sleeve is used to accommodate the coal gun, and the lower part is used to accommodate a wedge. The wedge has a regular structure with a gradually increasing cross-sectional area, and a groove matching the outer diameter of the coal gun is provided along one side of the wedge.

[0006] Furthermore, the sleeve is fitted onto the outside of the coal gun, and its fitting position is on the outside of the coal gun between the coal gun valve and the ball valve.

[0007] Furthermore, the length of the wedge is greater than the length of the sleeve.

[0008] Furthermore, the wedge is a right-angled trapezoidal structure, with its upper and lower bases being planes, its height line being a plane, and a groove with a gradually increasing cross-sectional area being opened on the height line. The projections of its left and right sides are trapezoidal, and the surface where its hypotenuse is located is an arc surface.

[0009] The specific method of using this utility model includes the following steps:

[0010] Step 1: Place the sleeve onto the coal gun from the valve side and insert the wedge into the sleeve;

[0011] Step 2: Use a hammer to strike the wedge until the coal gun is pulled out of the fire tube.

[0012] Furthermore, before step 1, the following steps are also included: when the coal gun is damaged and needs to be replaced, first close the valves on the coal injection branch pipe and the coal gun; remove the metal hose or rubber hose connecting the coal injection branch pipe and the coal gun.

[0013] Furthermore, after step 2, the following steps are taken:

[0014] Insert the new coal nozzle into the fire tube; connect the coal injection branch pipe to the coal nozzle with a metal hose or rubber hose; open the valves on the coal injection branch pipe and the coal nozzle to complete the replacement.

[0015] Compared with existing technologies, this invention has the following advantages: When replacing a worn coal gun, close the valves on the coal gun and the coal injection pipe, remove the metal hose, pull out the coal gun, put the sleeve on the coal gun, insert the modified wedge, and use a sledgehammer to strike the wedge to quickly pull out the coal gun. After pulling out the coal gun, the ball valve automatically closes, and then a new coal gun is installed. This invention enables online replacement, has a simple process, is easy to operate, saves labor costs, and reduces spare parts costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure during disassembly when applying this utility model.

[0018] Figure 2 This is a side view of the present invention installed behind the coal gun.

[0019] Figure 3 This is a schematic diagram of the wedge structure of this utility model.

[0020] Figure 4 This is a front view of the present invention installed after the coal gun.

[0021] Figure 5 This is a schematic diagram of the normal working state of the coal gun.

[0022] In the diagram: 1. Tile sleeve; 2. Coal gun; 3. Coal gun valve; 4. Ball valve; 5. Coal injection pipeline valve; 6. Metal hose; 7. First pipe clamp; 8. Second pipe clamp; 9. Wedge. Detailed Implementation

[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] 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 the present 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.

[0026] 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 this 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.

[0027] In the description of this utility model, 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 usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model 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 utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] 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.

[0029] 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 cannot be construed as limiting the scope of protection of this utility model.

[0030] like Figures 1-4 As shown in the figure, this utility model embodiment discloses an auxiliary tool for quickly changing blast furnace coal guns, including a sleeve. The sleeve has an opening of a preset width on one side. The upper part of the sleeve is used to accommodate the coal gun, and the lower part of the sleeve is used to accommodate a wedge. The wedge has a regular structure with a gradually increasing cross-sectional area, and a groove matching the outer diameter of the coal gun is provided along one side of the wedge.

[0031] Furthermore, the sleeve is fitted onto the outside of the coal gun, and its fitting position is on the outside of the coal gun between the coal gun valve and the ball valve.

[0032] Furthermore, the length of the wedge is greater than the length of the tile sleeve. In this embodiment, the length reference is along the direction of the coal gun.

[0033] Furthermore, the wedge is a right-angled trapezoidal structure, with its upper and lower bases being planes, its height line being a plane, and a groove with a gradually increasing cross-sectional area being opened on the height line. The projections of its left and right sides are trapezoidal, and the surface where its hypotenuse is located is an arc surface.

[0034] By forming a self-locking effect on the inclined plane, the pressure increases exponentially, and the final locking force can reach 20-30kN, which meets the requirements for pulling out the coal gun.

[0035] This utility model also provides a method for using the auxiliary tool, including the following steps:

[0036] Step 1: Place the sleeve onto the coal gun from the valve side and insert the wedge into the sleeve; ensure the opening faces the operating side;

[0037] Step 2: Use a hammer to strike the wedge until the coal gun is pulled out of the fire tube.

[0038] During the specific disassembly and assembly process, wedges are inserted to the initial positioning mark line, and explosion-proof copper hammers are used to perform stepped impacts, with the impact energy being increased in stages. The displacement of the wedges is monitored by visual inspection or by marking. Based on different coal gun lengths, disassembly is completed when the cumulative displacement reaches the preset standard.

[0039] like Figure 5 As shown, before step 1, the following steps are also included: When the coal gun is damaged and needs to be replaced, first close the valves on the coal injection branch pipe and the coal gun; remove the metal hose or rubber hose connecting the coal injection branch pipe and the coal gun. During the disassembly process, use an explosion-proof wrench to disassemble the metal hose flange connection, leaving two bolts diagonally unremoved; slowly release the residual pressure in the pipe through a special pressure relief valve until the safety standard is reached.

[0040] After step 2, the following steps are followed:

[0041] Insert the new coal nozzle into the fire tube; connect the coal injection branch pipe to the coal nozzle with a metal hose or rubber hose; open the valves on the coal injection branch pipe and the coal nozzle to complete the replacement.

[0042] As an optional implementation, the outer surface of the sleeve is provided with anti-slip texture and knurled. The wedge is forged from high-carbon tool steel and surface nitrided, forming a composite mechanical structure. This ensures that the device does not deform severely under repeated hammering during disassembly.

[0043] As an optional implementation, a buffer pad mounting groove can be provided at the impact end of the wedge, in which a polyurethane buffer pad can be embedded or a polyurethane buffer pad can be directly placed at the impact end to further improve the service life and deformation resistance of the wedge.

[0044] At a certain 3200m 3In blast furnace applications: Raw coal lance disassembly time: 127 minutes; after using this tool: 19 minutes; number of impacts: traditional methods require 300-400 hammer blows, now only 12-15 staged impacts are needed; coal lance damage rate decreases from 28% to 1.5%. A single operation saves approximately 2500 yuan in maintenance costs, and annually saves 36-48 hours of blast furnace downtime, corresponding to an increased production benefit of approximately 800,000 yuan.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 therein. Such 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 this utility model.

Claims

1. An auxiliary tool for quick replacement of a blast furnace coal gun, characterized in that, The utility model discloses a tile sleeve, which is provided with an opening with a preset width on one side, and the upper part of the inside of the tile sleeve is used for accommodating a coal gun, and the lower part of the inside of the tile sleeve is used for accommodating a wedge.

2. The aid according to claim 1, characterized in that The tile sleeve is sleeved on the outside of the coal gun, and the sleeving position is the outside of the coal gun between a valve and a poppet valve.

3. The aid according to claim 1, characterized in that The length of the wedge is greater than the length of the tile sleeve.

4. The aid according to claim 1, characterized in that The wedge is a right trapezoidal body structure, the upper and lower bottom surfaces are planes, the surface where the hypotenuse is located is an arc surface, and the groove with gradually increasing cross-sectional area is arranged on the surface where the hypotenuse is located. The projection of the left and right side surfaces is a trapezoid, and the surface where the hypotenuse is located is an arc surface.

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