Method for pre-burying irregular-shaped lower injection pipe in coke oven foundation top plate

Abstract

The present application relates to the field of coke oven construction technology, in particular to a method for pre-burying a special-shaped lower injection pipe in a coke oven foundation top plate, which can quickly and accurately install the lower injection pipe to the designated installation position, ensure the installation accuracy of the lower injection pipe, speed up the installation speed of the lower injection pipe, reduce the construction time of the coke oven reconstruction, improve the efficiency, and indirectly save the construction cost.

Description

Technical Field

[0001] This invention relates to the field of coke oven construction technology, specifically a method for pre-embedding irregularly shaped lower nozzles within the top slab of a coke oven foundation. Background Technology

[0002] With the development of my country's metallurgical industry, environmental protection requirements are becoming increasingly stringent. Coking plants are constantly being upgraded and renovated, transforming old furnace types into new ones that meet national environmental standards. The lower nozzle is one of the most crucial embedded components of a coking oven. During coking oven renovation, the lower nozzle's position must first be fixed before concrete is poured. However, since lower nozzles are mostly castings and irregularly shaped, and a single coking oven may have thousands of lower nozzles, the installation workload is substantial. Furthermore, the precision requirements for pre-embedding are high; the maximum allowable deviation of the centerline of each lower nozzle is ±5mm. Therefore, lower nozzle installation is one of the most difficult and time-consuming steps in coking oven renovation. Consequently, improving the construction process to make lower nozzle installation more convenient and efficient has become a crucial issue for industry professionals. Summary of the Invention

[0003] The present invention aims to solve the above problems, thereby providing a method for pre-embedding irregularly shaped lower nozzles in the top plate of a coke oven foundation.

[0004] The technical solution adopted by the present invention to solve the aforementioned problem is as follows:

[0005] A method for pre-embedding an irregularly shaped lower nozzle within the top slab of a coke oven foundation, comprising the following steps:

[0006] Step 1: Before pouring the concrete structure of the coke oven foundation roof slab, mark the baseline on the formwork of the coke oven foundation roof slab concrete structure according to the installation position of the lower spray pipe on the drawings, and determine the center point of the installation position of the lower spray pipe.

[0007] Step 2: Using an electric drill with the same diameter as the lower nozzle, and an electric drill, make the first hole by taking the center point of the determined lower nozzle installation position as the center. Then, make the second hole by taking any point on the outer edge of the first hole as the center.

[0008] Step 3: Install a fixing frame above the formwork of the concrete structure of the coke oven foundation roof slab;

[0009] Step 4: Install the irregularly shaped lower nozzle. The irregularly shaped end of the lower nozzle can easily pass through the mounting hole formed by the first hole and the second hole, and ensure that the depth deviation of the irregularly shaped lower nozzle inserted into the mounting hole is kept within ±3mm. Then, tie the upper end of the irregularly shaped lower nozzle to the fixing frame. After tying, the irregularly shaped lower nozzle is in a vertical position.

[0010] Step 5: Seal the installation holes with thin iron sheets and fix them to the formwork of the coke oven foundation roof concrete structure with iron nails;

[0011] Step 6: Pour the concrete structure of the coke oven foundation roof slab.

[0012] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art:

[0013] The construction method described in this invention can quickly and accurately install the lower spray pipe to the designated installation position, ensuring the installation accuracy of the lower spray pipe, speeding up the installation speed of the lower spray pipe, reducing the construction time of coke oven modification, improving efficiency, and indirectly saving construction costs.

[0014] As a preferred embodiment, a further technical solution of the present invention is:

[0015] The fixing frame consists of multiple horizontal bars, vertical bars, and vertical rods. The vertical rods are located at the bottom of the vertical bars to support them. The horizontal bars are horizontal and perpendicular to the vertical bars, overlapping the vertical bars and located on one side directly above the mounting holes. The height of the vertical bars is higher than the upper surface of the concrete structure of the coke oven foundation top plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the layout structure above the formwork of the concrete structure of the coke oven foundation roof slab according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the template opening structure of the concrete structure of the coke oven foundation roof slab according to an embodiment of the present invention;

[0018] Figure 3 This is a top view of the mounting hole structure according to an embodiment of the present invention;

[0019] Figure 4 This is a top view schematic diagram of the mounting structure of the fixing bracket according to an embodiment of the present invention;

[0020] Figure 5 This is a side view of the nozzle after installation according to an embodiment of the present invention.

[0021] Figure 6 This is a top view schematic diagram of the thin sheet metal sealing structure for the mounting hole in an embodiment of the present invention;

[0022] The markings in the diagram are as follows: 1. Template for the concrete structure of the coke oven foundation roof; 2. Baseline; 3. Center point of the installation position of the lower spray pipe; 4. Electric drill opening tool; 5. Electric drill; 6. Installation hole; 7. Sheet iron; 8. Lower spray pipe; 9. Iron nail; 10. Concrete structure of the coke oven foundation roof; 11. Fixing frame; 11. First hole 6-1; Second hole 6-2; 11. Horizontal bar 11-1; 11. Vertical bar 11-2; 11. Vertical bar 11-3. Implementation

[0023] The present invention will be further described below with reference to embodiments, which are intended only to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0024] See Figures 1-6 A method for pre-embedding irregularly shaped lower nozzles within the top slab of a coke oven foundation, comprising the following steps:

[0025] Step 1: See Figure 1 Before pouring the concrete structure 10 of the coke oven foundation top slab, according to the installation position of the lower spray pipe 8 on the drawing, place the baseline 2 on the template 1 of the coke oven foundation top slab concrete structure to determine the center point 3 of the installation position of the lower spray pipe 8.

[0026] Step Two: See Figure 2 , Figure 3 Using an electric drill with the same diameter as the lower spray nozzle 8, and an electric drill 5, the first hole 6-1 is opened with the center point 3 of the determined lower spray nozzle installation position as the center. Then, the second hole 6-2 is opened with any point on the outer edge of the first hole 6-1 as the center.

[0027] Step 3: See Figure 4 A fixing frame 11 is installed above the template 1 of the concrete structure of the coke oven foundation top plate. The fixing frame 11 consists of multiple horizontal bars 11-1, vertical bars 11-2 and vertical bars 11-3. The vertical bars 11-3 are located at the bottom of the vertical bars 11-2 to support the vertical bars 11-2. The horizontal bars 11-1 are horizontal and perpendicular to the vertical bars 11-2, overlap the vertical bars 11-2, and are located on one side directly above the mounting hole 6. The height of the vertical bars 11-2 is higher than the height of the upper surface of the concrete structure 10 of the coke oven foundation top plate.

[0028] Step 4: See Figure 5 Install the irregularly shaped lower spray pipe 8. The irregularly shaped end of the lower spray pipe 8 can easily pass through the mounting hole 6 formed by the first hole 6-1 and the second hole 6-2, and ensure that the depth deviation of the irregularly shaped lower spray pipe 8 inserted into the mounting hole 6 is kept within ±3mm. Then, the upper end of the irregularly shaped lower spray pipe 8 is tied to the fixing frame 11. After the tying is completed, the irregularly shaped lower spray pipe 8 is in a vertical state.

[0029] Step 5: See Figure 5 , Figure 6 Thin iron 7 is used to seal the mounting hole 6, and iron nails 9 are used to fix it to the formwork 1 of the concrete structure of the coke oven foundation top plate.

[0030] Step 6: Pour the concrete structure of the coke oven foundation roof slab 10.

[0031] The construction method described in this invention can quickly and accurately install the lower spray pipe to the designated installation position, ensuring the installation accuracy of the lower spray pipe, speeding up the installation speed of the lower spray pipe, reducing the construction time of coke oven modification, improving efficiency, and indirectly saving construction costs.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A method for embedding a special-shaped lower injection pipe in a coke oven base roof, characterized in that, The following steps are taken: Step one: before pouring the coke oven foundation top plate concrete structure, according to the installation position of the lower injection pipe on the drawing, a reference line is placed on the formwork of the coke oven foundation top plate concrete structure to determine the center point of the installation position of the lower injection pipe; Step two: using a drill bit with the same diameter as the lower injection pipe and an electric drill, the first hole is drilled at the center point of the installation position of the lower injection pipe, and then the second hole is drilled at an arbitrary point on the outer edge line of the first hole; Step three: a fixed frame is installed above the formwork of the coke oven foundation top plate concrete structure, the fixed frame is composed of multiple horizontal rods, vertical rods, and vertical rods, the vertical rods support the vertical rods at the bottom of the vertical rods, the horizontal rods are perpendicular to the vertical rods and are located above the vertical rods, and one side of the horizontal rods is located directly above the installation hole, and the height of the vertical rods is higher than the height of the upper surface of the coke oven foundation top plate concrete structure; Step four: the special-shaped lower injection pipe is installed, the special-shaped end of the lower injection pipe can easily pass through the installation hole formed by the first hole and the second hole, and the depth deviation of the special-shaped lower injection pipe inserted into the installation hole is kept within ±3mm, then the upper end of the special-shaped lower injection pipe is tied with the fixed frame, after the tying is completed, the special-shaped lower injection pipe is in a vertical state as a whole; Step five: thin iron sheets are used to seal the installation hole, and iron nails are used to fix the formwork of the coke oven foundation top plate concrete structure; Step six: pouring the coke oven foundation top plate concrete structure.

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