CN217103981U - Furnace bottom structure of cast iron pipe continuous annealing furnace - Google Patents
Furnace bottom structure of cast iron pipe continuous annealing furnace Download PDFInfo
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- CN217103981U CN217103981U CN202220741820.6U CN202220741820U CN217103981U CN 217103981 U CN217103981 U CN 217103981U CN 202220741820 U CN202220741820 U CN 202220741820U CN 217103981 U CN217103981 U CN 217103981U
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Abstract
The utility model relates to a cast iron pipe production technical field provides a furnace bottom structure of cast iron pipe continuous annealing stove, include: furnace bottom masonry; the furnace bottom masonry is laid on a bottom plate of a furnace body steel structure; stove bottom brickwork includes: the heat insulation brick comprises a fiber machine plate, a plurality of layers of clay heat insulation refractory bricks and at least one layer of clay refractory bricks which are sequentially paved from bottom to top; a plurality of heat-resistant steel rails are arranged on the furnace bottom masonry; and a plurality of sand discharge devices are arranged on one side of the furnace bottom masonry. Two guide chain boxes are arranged on the furnace bottom masonry, and conveying chains in the furnace are arranged in the guide chain boxes; the arrangement direction of the chain guide box is consistent with that of the heat-resistant steel track. The chain guide box is laid with the chain guide box protecting bricks in a full-length mode, expansion gaps are reserved among the chain guide box protecting bricks, and the expansion gaps are filled with refractory fiber expansion strips. The utility model discloses can promote furnace bottom structure's thermal-insulated efficiency, improve furnace bottom structure's stability, improve the life of annealing stove.
Description
Technical Field
The utility model relates to a cast iron pipe production technical field especially relates to a furnace bottom structure of cast iron pipe continuous annealing stove.
Background
The continuous annealing furnace is used for spheroidizing annealing of cast iron pipes. The spheroidizing annealing of the ductile cast iron pipe is to anneal the pipe by heating, heat preservation and quick cooling. The cast iron pipe is shifted by a chain and rolls on a slide rail in the furnace, and the temperature in the furnace can reach more than 1000 ℃.
At present, the masonry mode of the bottom of the continuous annealing furnace is improper, the heat insulation effect is poor, and the high temperature easily causes the deformation of a steel structure of a furnace body, so that the service life of a mechanical structure of the furnace is short, and the mechanical structure of the furnace is easy to damage. In addition, the sliding rail arranged on the furnace bottom cannot be effectively fixed, so that the sliding rail can be displaced due to friction and impact of the pipe, the sliding rail can be displaced for a long time, the running deviation of the cast iron pipe is further caused, the cast iron pipe is cut and rubbed on a furnace wall, a conveying chain motor is stopped, even a furnace is disturbed, and the production of the cast iron pipe is seriously influenced.
Therefore, the furnace bottom masonry structure plays a vital role in stabilizing the operation of the cast pipe, protecting furnace bottom mechanical equipment from high-temperature radiation, saving energy and reducing consumption of the equipment and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses mainly solve prior art's continuous annealing stove bottom thermal-insulated effect poor, probably take place the slide rail and shift, lead chain box aversion or fracture, produce technical problem such as indiscriminate stove phenomenon, provide a cast iron pipe continuous annealing stove's furnace bottom structure to promote furnace bottom structure's thermal-insulated efficiency, improve furnace bottom structure's stability, improve the life of annealing stove.
The utility model provides a furnace bottom structure of cast iron pipe continuous annealing furnace, include: furnace bottom masonry;
the furnace bottom masonry is laid on a bottom plate of a furnace body steel structure;
stove bottom brickwork includes: the heat insulation brick comprises a fiber machine plate, a plurality of layers of clay heat insulation refractory bricks and at least one layer of clay refractory bricks which are sequentially paved from bottom to top;
a plurality of heat-resistant steel rails are arranged on the furnace bottom masonry; and a plurality of sand discharge devices are arranged on one side of the furnace bottom masonry.
Preferably, two chain guide boxes are arranged on the furnace bottom masonry, and conveying chains in the furnace are arranged in the chain guide boxes;
the arrangement direction of the chain guide box is consistent with that of the heat-resistant steel track.
Preferably, the chain guide box is laid with the chain guide box protecting bricks in a full length mode, expansion gaps are reserved among the chain guide box protecting bricks, and the expansion gaps are filled with refractory fiber expansion strips.
Preferably, a plurality of driving pulling claws are connected to the conveying chain in the furnace, and the driving pulling claws extend out of the chain guide box.
Preferably, the sand discharge device comprises: the sand glass prefabricated block, the sand discharge pipe, the shaft pin and the plate turnover device are arranged on the base;
the sand clock precast block is arranged in the furnace bottom masonry, and an outlet of the sand clock precast block is connected with the sand discharge pipe; the bottom of the sand discharge pipe is connected with the plate turnover device through a shaft pin; and a counterweight block is arranged on the plate turnover device.
Preferably, the heat-resistant steel rail is formed by sequentially connecting a plurality of steel rail sections;
refractory bricks for fixing the track are respectively arranged at two ends of the connecting position of the steel rail section;
the front end of the single steel rail section in the running direction of the cast iron pipe is also provided with refractory bricks for fixing the rail, and the rear end of the single steel rail section is a free end;
the height of the refractory bricks for the fixed track is lower than that of the steel track section.
The utility model provides a furnace bottom structure of a cast iron pipe continuous annealing furnace, a fiber mechanism plate is laid on the bottom layer, which can adjust the flatness and the heat insulation protection; the multilayer clay heat-insulation refractory bricks are laid on the fiber machine board, so that the heat-insulation effect can be well achieved, the high-temperature furnace gas in the furnace is prevented from leaking, and the service life of mechanical equipment is prevented from being influenced; the clay refractory brick is laid on the clay heat-insulating refractory brick, has good high-temperature refractory performance and high mechanical compression resistance, is not easy to burn and damage and break when directly exposed in a high-temperature environment in a furnace, ensures the service performance, and increases the wear resistance and compression resistance of the surface of the furnace bottom brickwork. The sand discharge device can ensure automatic sand discharge and can leave certain sand in the sand discharge pipe to play a role in heat insulation. The utility model discloses the science of stove bottom brickwork is arranged, guarantees that cast iron pipe straight line moves on whole stove track, can promote furnace bottom structure's thermal-insulated efficiency, improves furnace bottom structure's stability, improves the life of annealing stove.
Drawings
FIG. 1 is a front view of a furnace bottom structure of a continuous annealing furnace for cast iron pipes according to the present invention;
FIG. 2 is a plan view of a furnace bottom structure of a cast iron pipe continuous annealing furnace provided by the present invention;
FIG. 3 is a side view of a furnace bottom structure of a continuous annealing furnace for cast iron pipes according to the present invention;
FIG. 4 is a schematic structural view of the furnace bottom masonry provided by the present invention;
FIG. 5 is a schematic top view of the furnace bottom brickwork provided by the present invention;
fig. 6 is a schematic structural diagram of a sand discharge device provided by the present invention;
fig. 7 is a schematic top view of the sand discharge device provided by the present invention.
Reference numerals: 1. a furnace steel structure; 2. a fiberized board; 3. clay heat-insulating refractory bricks; 4. clay refractory bricks; 5. a heat resistant steel rail; 6. a chain guide box; 7. a sand discharge device; 8. a furnace roof masonry; 9. furnace side masonry; 10. a cast iron pipe; 11. a cast iron pipe socket; 12. driving the pulling claw; 13. a conveyor chain in the furnace; 14. protecting bricks by a guide chain box; 15. a refractory brick for fixing a rail; 16. an hourglass precast block; 17. sand; 18. a sand discharge pipe; 19. a shaft pin; 20. a plate turnover device.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present invention are shown in the drawings.
As shown in fig. 1-3, the embodiment of the present invention provides a furnace bottom structure of a continuous annealing furnace for cast iron pipes, comprising: furnace bottom brickwork.
The furnace bottom masonry is laid on the bottom plate of the furnace body steel structure 1. The furnace bottom brickwork belongs to a part of the brickwork in the furnace, and forms the brickwork in the furnace together with the furnace top brickwork 8 and the furnace side brickwork 9.
As shown in fig. 4 and 5, the hearth masonry includes: a fiber machine board 2, a plurality of layers of clay heat-insulating refractory bricks 3 and at least one layer of clay refractory bricks 4 which are laid in sequence from bottom to top.
In the embodiment, the fiber machine board 2 is laid on the bottommost layer for adjusting the flatness and insulating heat. Three layers of standard clay heat-insulating refractory bricks 3 are laid on the fiber mechanism plates 2, the bricks can well play a heat-insulating effect, high-temperature furnace gas in the furnace is prevented from leaking out, the service life of mechanical equipment is prevented from being influenced, the weight can be well lightened by using the bricks, and the load pressure is relieved for the bottom of the whole furnace body steel structure 1. The standard type clay refractory brick 4 is laid on the clay heat-insulating refractory brick 3, has good high-temperature refractory performance and high mechanical compression resistance, is not easy to burn and damage and break when being directly exposed in a high-temperature environment in a furnace, ensures the service performance, and increases the wear resistance and compression resistance of the surface of the furnace bottom masonry.
Wherein, the clay refractory bricks 4 on the uppermost layer can have different laying structures according to the requirements of different positions. Two clay refractory bricks 4 which are vertically placed are designed at the bell mouth 11 of the cast iron pipe, so that the nearby centering machine protecting brick can be well fixed, and residual sand at the bell mouth 11 of the cast iron pipe can be prevented from falling at the junction of the furnace side brickwork 9 and the furnace bottom brickwork, so that the residual sand falls near the sand discharge device 7.
A plurality of heat-resistant steel rails 5 are arranged on the furnace bottom masonry, and in the embodiment, five heat-resistant steel rails 5 are arranged in the full length as shown in fig. 2; the heat-resistant steel track 5 is formed by sequentially connecting a plurality of steel rail sections; refractory bricks 15 for fixing the rail are provided at both ends of the joint of the rail sections. The track-use refractory bricks 15 may be standard type clay refractory bricks. The clay refractory bricks 4 fix the heat-resistant steel rail 5 on the plane of the furnace bottom masonry, and the refractory bricks 15 for fixing the rail protrude out of the clay refractory bricks 4, but the height of the refractory bricks is lower than that of the steel rail section, so that the rolling of a cast iron pipe is not influenced, and the transverse movement or the tilting of the heat-resistant rail can be effectively prevented. The front end of the single steel rail section in the running direction of the cast iron pipe is provided with a refractory brick 15 for fixing the rail, and the rear end of the single steel rail section is a free end. Thus, the heat-resistant steel rail 5 can be prevented from moving along with the cast iron pipe, and a space for rail expansion is reserved, so that the furnace bottom and the heat-resistant steel rail 5 are prevented from being damaged.
Two guide chain boxes 6 are arranged on the furnace bottom masonry, and a furnace conveying chain 13 is arranged in each guide chain box 6; two guide chain boxes 6 are distributed on two sides of the middle position of the furnace bottom masonry, and the arrangement directions of the guide chain boxes 6 and the heat-resistant steel rails 5 are consistent. The chain guide box 6 is laid with the chain guide box protection bricks 14 in a full length mode, the chain guide box protection bricks 14 are made of nonstandard masonry modules through low cement pouring, expansion gaps are reserved among the chain guide box protection bricks 14, and the expansion gaps are filled with refractory fiber expansion strips. A plurality of driving pulling claws 12 are connected to the conveying chain 13 in the furnace, and the driving pulling claws 12 extend out of the chain guide box 6.
In the embodiment, the chain guide box 6 is a running track of a conveying chain 13 in the furnace, and when the conveying chain 13 in the furnace runs in the chain guide box 6, a driving claw 12 of the conveying chain 13 in the furnace pushes a cast iron pipe to roll on the heat-resistant steel track 5 in the furnace. The scientific arrangement of the furnace bottom masonry in the embodiment is very important for ensuring that the cast iron pipe linearly runs on the whole furnace track.
In the basis of the scheme, a plurality of sand discharging devices 7 are arranged on one side of the furnace bottom brickwork. As shown in fig. 6 and 7, the sand discharge device 7 includes: the sand glass precast block 16, the sand discharge pipe 18, the shaft pin 19 and the plate turnover device 20; the hourglass precast block 16 is arranged in the furnace bottom masonry, and the outlet of the hourglass precast block 16 is connected with a sand discharge pipe 18; the bottom of the sand discharge pipe 18 is connected with a plate turnover device 20 through a shaft pin 19; the plate turnover device 20 is provided with a balancing weight.
The sand discharge pipe 18 is welded on the bottom plate of the furnace steel structure 1, and when sand 17 falls from a sand discharge opening of the hourglass precast block 16, the sand is accumulated in the sand discharge pipe. When the sand 17 is fully piled up in the sand discharge pipe 18, the weight of the sand 17 is larger than the weight block at the rear side of the flap device 20, the flap device 20 is opened, and the sand 17 is discharged. When the sand 17 is in the remaining half of the sand discharge pipe 18, the weight of the sand 17 is smaller than that of the counterweight, and the sand is automatically closed. Therefore, automatic sand discharge can be ensured, and certain sand can be left in the sand discharge pipe 18 to play a role in heat insulation.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced, without substantially departing from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A furnace bottom structure of a cast iron pipe continuous annealing furnace is characterized by comprising: furnace bottom masonry;
the furnace bottom masonry is laid on a bottom plate of a furnace body steel structure (1);
stove bottom brickwork includes: a fiber machine-made plate (2), a plurality of layers of clay heat-insulating refractory bricks (3) and at least one layer of clay refractory bricks (4) which are sequentially paved from bottom to top;
a plurality of heat-resistant steel rails (5) are arranged on the furnace bottom masonry; and a plurality of sand discharge devices (7) are arranged on one side of the furnace bottom masonry.
2. The hearth structure of a cast iron pipe continuous annealing furnace according to claim 1, characterized in that two chain guiding boxes (6) are arranged on said hearth brickwork, and a conveying chain (13) in the furnace is arranged in said chain guiding boxes (6);
the arrangement direction of the chain guide box (6) is consistent with that of the heat-resistant steel track (5).
3. The hearth structure of the cast iron pipe continuous annealing furnace according to claim 2, wherein the chain box (6) is laid with chain box protective bricks (14) throughout, expansion gaps are left between the chain box protective bricks (14), and the expansion gaps are filled with refractory fiber expansion strips.
4. The hearth structure of a cast iron pipe continuous annealing furnace according to claim 3, characterized in that a plurality of driving claws (12) are connected to said in-furnace conveyor chain (13), said driving claws (12) protruding from the chain box (6).
5. The hearth structure of a continuous annealing furnace of cast iron pipes according to claim 1 or 4, characterized in that said sand discharging means (7) comprises: the sand glass prefabricated block (16), the sand discharge pipe (18), the shaft pin (19) and the plate turnover device (20);
the hourglass precast block (16) is arranged in the furnace bottom masonry, and an outlet of the hourglass precast block (16) is connected with a sand discharge pipe (18); the bottom of the sand discharge pipe (18) is connected with a plate turnover device (20) through a shaft pin (19); and a balancing weight is arranged on the plate turnover device (20).
6. The hearth structure of a cast iron pipe continuous annealing furnace according to claim 5, characterized in that said heat-resistant steel rail (5) is formed by connecting a plurality of steel rail sections in sequence;
refractory bricks (15) for fixing the track are respectively arranged at two ends of the connecting position of the steel rail section;
the front end of the single steel rail section in the running direction of the cast iron pipe is also provided with a refractory brick (15) for fixing the rail, and the rear end of the single steel rail section is a free end;
the height of the refractory bricks (15) for the fixed track is lower than that of the steel track section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220741820.6U CN217103981U (en) | 2022-04-01 | 2022-04-01 | Furnace bottom structure of cast iron pipe continuous annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220741820.6U CN217103981U (en) | 2022-04-01 | 2022-04-01 | Furnace bottom structure of cast iron pipe continuous annealing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217103981U true CN217103981U (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220741820.6U Active CN217103981U (en) | 2022-04-01 | 2022-04-01 | Furnace bottom structure of cast iron pipe continuous annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217103981U (en) |
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- 2022-04-01 CN CN202220741820.6U patent/CN217103981U/en active Active
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