A gas downcomer embedding and fixing structure and embedding method in the basic roof of a coke oven

Abstract

The present invention relates to a buried and fixed structure and a burying method of a gas down-spray pipe in a coke oven foundation roof slab. The embedded casing is buried in the foundation roof slab, and the top of the expansion bolt extends out of the foundation roof slab and is connected to the fixed cross beam; the fixed cross beam is fixedly connected to the upper fixed frame, and a plurality of control round holes are formed in the upper fixed frame, and grouting holes are arranged outside the control round holes; after the upper fixed frame is fixed, the axis of the control round hole is coaxial with the axis of the embedded casing; a bottom formwork is arranged at the bottom of the foundation roof slab, and the lower fixing frame is fixedly connected to the bottom formwork; when burying the gas down-spray pipe, the lower end of the gas down-spray pipe sequentially passes through the control round holes on the upper fixed frame, the embedded casing, and the through holes on the bottom formwork and then extends to the set position, and the lower fixing frame is detachably fixedly connected to the lower part of the gas down-spray pipe. The present invention can realize the precise positioning and fixation during the post-burial of the gas down-spray pipe, and ensure that the installation position of the gas down-spray pipe meets the design requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of coke oven construction, and particularly to a buried and fixed structure and method for gas downspray pipes in the coke oven foundation roof slab. Background Art

[0002] At present, during the construction of the coke oven foundation roof slab, the construction method of post-burial of gas downspray pipes is often adopted, that is, embedded sleeves are set in the foundation roof slab and concrete is poured, and then the coke oven gas downspray pipes are post-buried in the foundation roof slab as required, and the post-burial is completed through secondary grouting. The requirements for the burial of gas downspray pipes are accurate horizontal position (allowable error ±1 mm) and accurate pipe top elevation (allowable error 3 mm). During the burial process of gas downspray pipes, it is difficult to ensure that the installation position accuracy of gas downspray pipes meets the requirements of relevant technical documents without adopting positioning and reinforcement measures. Summary of the Invention

[0003] The present invention provides a buried and fixed structure and method for gas downspray pipes in the coke oven foundation roof slab, which can realize precise positioning and fixation during the post-burial of gas downspray pipes and ensure that the installation position of gas downspray pipes meets the design requirements.

[0004] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0005] A buried and fixed structure for gas downspray pipes in the coke oven foundation roof slab includes embedded sleeves, expansion bolts, fixed crossbeams, upper fixed frames and lower fixed brackets; a plurality of the embedded sleeves are buried in the foundation roof slab, and the axes of the embedded sleeves correspond one by one to the center lines of the installation positions of the gas downspray pipes; a plurality of the expansion bolts are fixedly arranged at intervals on the upper part of the foundation roof slab, and the tops of the expansion bolts extend out of the foundation roof slab and are connected to the fixed crossbeams; the fixed crossbeams are fixedly connected to the upper fixed frames, and a plurality of control round holes are opened on the upper fixed frames, and grouting holes are arranged outside the control round holes; after the upper fixed frames are fixed, the axes of the control round holes are coaxial with the axes of the embedded sleeves; a bottom formwork is arranged at the bottom of the foundation roof slab, and through holes are opened on the bottom formwork at the corresponding installation positions of the gas downspray pipes; the lower fixed brackets are fixedly connected to the bottom formwork; when burying the gas downspray pipes, the lower ends of the gas downspray pipes sequentially pass through the control round holes on the upper fixed frames, the embedded sleeves, and the through holes on the bottom formwork and then extend to the set positions, and the lower fixed brackets are detachably fixedly connected to the lower parts of the gas downspray pipes.

[0006] The upper fixed frames are made of steel strips; along the transverse direction of the coke oven, the gas downspray pipes in the same row are taken as a group, and at least one upper fixed frame is used to connect the gas downspray pipes in a group when they are fixed; the control round holes on the upper fixed frames are arranged in a row, and the center distance between two adjacent control round holes is equal to the transverse center distance of the gas downspray pipes.

[0007] The diameter of the control round hole is the outer diameter of the gas downcomer+(0.5 to 1.5)mm.

[0008] On the outside of the control round hole, 2 grouting holes are symmetrically arranged. The grouting holes are crescent-shaped through holes; the maximum distance between the outer edges of the 2 grouting holes is less than the inner diameter of the embedded casing.

[0009] The spacing distance of the expansion bolts is 0.8 to 1.2m.

[0010] The fixed cross beam is a threaded steel bar.

[0011] The lower fixing frame is a frame body composed of steel pipes and fasteners. The lower fixing frame and the gas downcomer are fixedly connected through fasteners.

[0012] A method for burying a gas downcomer in the foundation roof of a coke oven includes the following steps:

[0013] 1) Fabricate the upper fixing frame; open a control round hole on the steel strip. The center distance of the control round hole is the transverse center distance of the gas downcomer. The diameter of the control round hole is the outer diameter of the gas downcomer+(0.5 to 1.5)mm; then open grouting holes on both sides of the control round hole; the length of the upper fixing frame is determined according to the on-site situation;

[0014] 2) Install the upper fixing frame; perform the layout operation of the installation position of the gas downcomer on the top of the foundation roof, and draw a cross center line; then drill holes at the set intervals on the top of the foundation roof and bury the expansion bolts; weld the exposed parts of the fixed cross beam and the expansion bolts firmly, and finally weld the fabricated upper fixing frame on the fixed cross beam, and align the center line of the control round hole on the upper fixing frame with the cross center line;

[0015] 3) Install the gas downcomer; sequentially pass the lower end of the gas downcomer through the control round hole of the upper fixing frame, the embedded casing and the through hole on the bottom formwork and extend it to the set position; the lower part of the gas downcomer and the lower fixing frame are firmly connected through fasteners;

[0016] 4) Adjust the installation position of the gas downcomer; manually use a tape measure and a spirit level to adjust and verify the installation position of the gas downcomer to meet the design requirements;

[0017] 5) Grouting operation; after all the installation positions of the gas downcomer are inspected and accepted, perform the grouting operation; pour high-strength grouting material into the gap between the gas downcomer and the embedded casing from the grouting hole, and finally pour the gas downcomer and the foundation roof together;

[0018] 6) Remove the temporary fixing structure; when the strength of the grouting material meets the requirements, remove the upper fixing frame and the lower fixing frame; the burial of a group of gas downcomers is completed;

[0019] 7) Carry out the embedding of the next group of gas lower injection pipes, or carry out the embedding construction of multiple groups of gas lower injection pipes simultaneously until the embedding of all gas lower injection pipes is completed.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] It can achieve precise positioning and fixation during the post-embedding of the gas lower injection pipes, ensuring that the installation positions of the gas lower injection pipes meet the design requirements. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the upper fixing frame described in the present invention.

[0023] Figure 2 It is a front view of a gas lower injection pipe embedding and fixing structure in the coke oven foundation top plate described in the present invention.

[0024] Figure 3 It is Figure 2 An enlarged view of part A in

[0025] Figure 4 It is Figure 2 View B-B in

[0026] Figure 5 It is Figure 4 An enlarged view of part C in

[0027] In the figure: 1. Upper fixing frame; 2. Control round hole; 3. Grouting hole; 4. Foundation top plate; 5. Expansion bolt; 6. Fixed cross beam; 7. Bottom formwork; 8. Lower fixing frame; 9. Gas lower injection pipe; 10. Fastener; 11. Embedded sleeve Detailed Embodiment

[0028] The following further describes the detailed embodiment of the present invention in conjunction with the drawings:

[0029] As Figures 2 - 5 shown, a gas lower injection pipe embedding and fixing structure in the coke oven foundation top plate described in the present invention includes an embedded sleeve 11, an expansion bolt 5, a fixed cross beam 6, an upper fixing frame 1 and a lower fixing frame 8; a plurality of the embedded sleeves 11 are embedded in the foundation top plate 4, and the axes of the embedded sleeves 11 correspond one by one to the center lines of the installation positions of the gas lower injection pipes 9; a plurality of the expansion bolts 5 are fixedly arranged at intervals on the upper part of the foundation top plate 4, and the tops of the expansion bolts 5 extend out of the foundation top plate 4 and are connected to the fixed cross beam 6; the fixed cross beam 6 is fixedly connected to the upper fixing frame 1, as Figure 1As shown in the figure, a plurality of control round holes 2 are opened on the upper fixing frame 1, and grouting holes 3 are arranged on the outer side of the control round holes 2; after the upper fixing frame 1 is fixed, the axis of the control round hole 2 is coaxial with the axis of the embedded casing 11; a bottom formwork 7 is arranged at the bottom of the foundation top plate 4, and a through hole is opened on the bottom formwork 7 at the installation position corresponding to the gas lower spray pipe 9; the lower fixing frame 8 is fixedly connected with the bottom formwork 7; when burying the gas lower spray pipe 9, the lower end of the gas lower spray pipe 9 sequentially passes through the control round hole 2 on the upper fixing frame 1, the embedded casing 11, and the through hole on the bottom formwork 7 and then extends to the set position, and the lower fixing frame 8 is detachably fixedly connected with the lower part of the gas lower spray pipe 9.

[0030] The upper fixing frame 1 is made of steel strip; along the transverse direction of the coke oven, the gas lower spray pipes 9 in the same row are taken as a group, and a group of gas lower spray pipes 9 are connected by at least one upper fixing frame 1 during fixation; the control round holes 2 on the upper fixing frame 1 are arranged in a row, and the center distance between two adjacent control round holes 2 is equal to the transverse center distance of the gas lower spray pipe 9.

[0031] The diameter of the control round hole 2 is the outer diameter of the gas lower spray pipe 9+(0.5 - 1.5)mm.

[0032] Two grouting holes 3 are symmetrically opened on the outer side of the control round hole 2, and the grouting holes 3 are crescent through holes; the maximum distance between the outer edges of the two grouting holes 3 is less than the inner diameter of the embedded casing 11.

[0033] The spacing distance of the expansion bolts 5 is 0.8 - 1.2m.

[0034] The fixed cross beam 6 is a threaded steel bar.

[0035] The lower fixing frame 8 is a frame body composed of steel pipes and fasteners 10, and the lower fixing frame 8 is fixedly connected with the gas lower spray pipe 9 through the fasteners 10.

[0036] A method for burying the gas lower spray pipe in the foundation top plate of a coke oven includes the following steps:

[0037] 1) Fabricate the upper fixing frame 1; open control round holes 2 on the steel strip, the center distance of the control round holes 2 is the transverse center distance of the gas lower spray pipe 9, and the diameter of the control round hole 2 is the outer diameter of the gas lower spray pipe 9+(0.5 - 1.5)mm; then open grouting holes 3 on both sides of the control round hole 2; the length of the upper fixing frame 1 is determined according to the on-site situation;

[0038] 2) Install the upper fixed frame; conduct layout operations for the installation position of the gas lower injection pipe 9 on the top of the foundation top plate 4, and lay a cross center line; then drill holes at set intervals on the top of the foundation top plate 4 and embed the expansion bolts 5; weld the exposed parts of the fixed cross beam 6 and the expansion bolts 5 firmly, and finally weld the fabricated upper fixed frame 1 onto the fixed cross beam 6, and align the center line of the control round hole 2 on the upper fixed frame 1 with the cross center line;

[0039] 3) Install the gas lower injection pipe; sequentially pass the lower end of the gas lower injection pipe 9 through the control round hole 2 of the upper fixed frame 1, the embedded casing 11 and the through hole on the bottom formwork 7 and extend it to the set position; firmly connect the lower part of the gas lower injection pipe 9 and the lower fixed frame 8 through the fasteners 10;

[0040] 4) Adjust the installation position of the gas lower injection pipe; manually use a tape measure and a spirit level to adjust and verify the installation position of the gas lower injection pipe 9 to meet the design requirements;

[0041] 5) Grouting operation; after all inspections and acceptances of the installation position of the gas lower injection pipe 9 are qualified, conduct the grouting operation; pour the high-strength grouting material into the gap between the gas lower injection pipe 9 and the embedded casing 11 from the grouting hole 3, and finally pour the gas lower injection pipe 9 and the foundation top plate 4 together;

[0042] 6) Remove the temporary fixing structure; when the strength of the grouting material meets the requirements, remove the upper fixed frame 1 and the lower fixed frame 8; the embedding of a group of gas lower injection pipes 9 is completed;

[0043] 7) Conduct the embedding of the next group of gas lower injection pipes, or conduct the embedding construction of multiple groups of gas lower injection pipes simultaneously until the embedding of all gas lower injection pipes is completed.

[0044] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A buried and fixed structure for gas down-spray pipes inside the basic roof slab of a coke oven, characterized in that It includes embedded sleeves, expansion bolts, fixed crossbeams, upper fixed frames and lower fixed brackets; the embedded sleeves are multiple and buried in the foundation top plate, and the axes of the embedded sleeves correspond one by one to the installation position center lines of the gas downspray pipes; the expansion bolts are multiple and are fixedly arranged at intervals on the upper part of the foundation top plate, and the tops of the expansion bolts extend outside the foundation top plate and are connected to the fixed crossbeams; the fixed crossbeams are threaded steel bars, the fixed crossbeams are fixedly connected to the upper fixed frames, and multiple control round holes are opened on the upper fixed frames, and grouting holes are arranged outside the control round holes; the upper fixed frames are made of steel strips; along the transverse direction of the coke oven, the gas downspray pipes in the same row are in a group, and a group of gas downspray pipes are connected by at least one upper fixed frame during fixation; the control round holes on the upper fixed frame are in a row, and the center distance between adjacent two control round holes is equal to the transverse center distance of the gas downspray pipes; the diameter of the control round holes is 0.5 - 1.5 mm larger than the outer diameter of the gas downspray pipes; after the upper fixed frame is fixed, the axis of the control round holes is coaxial with the axis of the embedded sleeves; a bottom formwork is arranged at the bottom of the foundation top plate, and through holes are opened on the bottom formwork at the corresponding installation positions of the gas downspray pipes; the lower fixed brackets are fixedly connected to the bottom formwork; when burying the gas downspray pipes, the lower ends of the gas downspray pipes sequentially pass through the control round holes on the upper fixed frame, the embedded sleeves, and the through holes on the bottom formwork and then extend to the set positions, and the lower fixed brackets are detachably fixedly connected to the lower parts of the gas downspray pipes; the lower fixed brackets are frame bodies composed of steel pipes and fasteners, and the lower fixed brackets and the gas downspray pipes are fixedly connected through fasteners.

2. A buried and fixed structure of a gas downcomer in the coke oven foundation roof according to claim 1, characterized in that, Two grouting holes are symmetrically opened outside the control round holes, and the grouting holes are crescent-shaped through holes; the maximum distance between the outer edges of the two grouting holes is less than the inner diameter of the embedded sleeve.

3. The gas downcomer embedding and fixing structure in the coke oven foundation top plate according to claim 1, wherein The spacing distance of the expansion bolts is 0.8 - 1.2 m.

4. A method for burying and fixing a gas downcomer in the coke oven foundation roof, which uses the gas downcomer burying and fixing structure in the coke oven foundation roof according to any one of claims 1 to 3, characterized in that, It includes the following steps: 1) Fabricate the upper fixed frame: Open control round holes on the steel strip, the center distance of the control round holes is the transverse center distance of the gas downspray pipes, and the diameter of the control round holes is 0.5 - 1.5 mm larger than the outer diameter of the gas downspray pipes; then open grouting holes on both sides of the control round holes; the length of the upper fixed frame is determined according to the on-site situation. 2) Install the upper fixed frame: Conduct layout operations for the installation positions of the gas downspray pipes on the top of the foundation top plate, and lay out the cross center line; then drill holes at the set intervals on the top of the foundation top plate and bury the expansion bolts; weld the exposed parts of the fixed crossbeams and the expansion bolts firmly, and finally weld the fabricated upper fixed frame on the fixed crossbeams and align the center line of the control round holes on the upper fixed frame with the cross center line. 3) Install the gas downspray pipes: Sequentially pass the lower ends of the gas downspray pipes through the control round holes of the upper fixed frame, the embedded sleeves and the through holes on the bottom formwork and then extend them to the set positions; firmly connect the lower parts of the gas downspray pipes and the lower fixed brackets through fasteners. 4) Adjust the installation positions of the gas downspray pipes: Adopt manual methods and use a tape measure and a spirit level to adjust and calibrate the installation positions of the gas downspray pipes to meet the design requirements. 5) Grouting operation: After all the installation positions of the gas downspray pipes are inspected and accepted as qualified, carry out the grouting operation. Pour high-strength grouting material into the gap between the gas lower spray pipe and the embedded casing from the grouting hole, and finally pour the gas lower spray pipe and the foundation top plate together; 6) Remove the temporary fixing structure: When the strength of the grouting material meets the requirements, remove the upper fixing frame and the lower fixing bracket; the embedding of a group of gas lower spray pipes is completed; 7) Carry out the embedding of the next group of gas lower spray pipes, or carry out the embedding construction of multiple groups of gas lower spray pipes simultaneously until the embedding of all gas lower spray pipes is completed.

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