CN215103412U - Heating furnace hearth roll - Google Patents
Heating furnace hearth roll Download PDFInfo
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- CN215103412U CN215103412U CN202120609479.4U CN202120609479U CN215103412U CN 215103412 U CN215103412 U CN 215103412U CN 202120609479 U CN202120609479 U CN 202120609479U CN 215103412 U CN215103412 U CN 215103412U
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Abstract
The utility model relates to a heating furnace hearth roll belongs to metallurgical industry heating furnace technical field. The technical scheme is as follows: the furnace wall (3) is anchored on the furnace shell (2) through anchoring nails, the furnace roller (4) penetrates through the furnace shell (2) and the furnace wall (3), two ends of the furnace roller (4) are exposed outside the furnace shell (2), two ends of the furnace roller (4) are supported on bearing blocks (1), the bearing blocks (1) are fixed on a support (7), and the support (7) is fixed on the furnace shell (2); an expansion joint (6) with a flange is sleeved on a furnace roller (4) outside a furnace shell (2), two ends of the expansion joint (6) with the flange are respectively connected with a bearing seat (1) and a furnace shell flange (8), the furnace shell flange (8) is fixed on the furnace shell (2), a refractory sleeve (5) is sleeved on the furnace roller (4) in the furnace shell (2), and the refractory sleeve (5) is positioned between a furnace wall (3) and the furnace roller (4). The utility model has the advantages that: the phenomenon of furnace bottom roller rotation blocking caused by the furnace bottom roller being heated and bent can be effectively avoided.
Description
Technical Field
The utility model relates to a heating furnace hearth roll belongs to metallurgical industry heating furnace technical field.
Background
The heating furnace is important equipment in the industrial production heat treatment process, the heating furnace is used for isolating the heat in the furnace from transferring outwards and protecting a furnace shell, and the inner wall of the furnace shell of the heating furnace is lined with refractory materials. The refractory materials are divided into two types, one is a refractory fiber module with lower density, and the other is a refractory brick with higher density. The heating furnace is generally provided with a hearth roll for continuously conveying heat-treated parts, the hearth roll is generally arranged on the side wall of the heating furnace, a hearth roll bearing seat is arranged outside the furnace shell of the heating furnace, and a roll body penetrates through the furnace wall.
The hearth roll is generally in a high-temperature state, the temperature in the heating furnace can reach 1300 ℃ at most, in order to avoid the hearth roll from being heated and deformed, the hearth roll is made of heat-resistant steel with better hardness, and the hearth roll in a high-temperature area is cooled by cooling water. The bearing seats are installed at two ends of the hearth roll, the bearing seats are generally fixed on a furnace shell of the heating furnace, in order to prevent high temperature in the furnace from entering the bearing seats to damage the running and lubrication of the bearings, accessories including a refractory sleeve and an expansion joint are further installed between the bearing seats of the hearth roll and the furnace shell, the refractory sleeve can bear the temperature of the furnace, the gap between the refractory sleeve and the furnace roll is small, and the conduction of heat in the furnace to the bearing seats of the hearth roll can be reduced.
The furnace bottom roller needs to keep continuous rotation or intermittent positive and negative rotation after the furnace temperature is higher than a certain temperature so as to avoid the deformation of the furnace bottom roller caused by high temperature in the furnace after long-time stop. When equipment failure or operation error occurs, the furnace bottom roller does not rotate according to the program setting or the operation program, the furnace bottom roller stops rotating for a long time to cause the furnace bottom roller to be heated and bent, and the furnace bottom roller is blocked when the furnace bottom roller is serious in rotation and needs to be replaced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a heating furnace bottom roller can effectively avoid the bottom roller of furnace bottom roller heated bending to cause to rotate the card phenomenon of hindering, solves the problem that exists among the background art.
The technical scheme of the utility model is that:
a heating furnace hearth roll comprises a bearing seat, a furnace shell, a furnace wall, a furnace roll, a refractory sleeve, an expansion joint with a flange, a support and a furnace shell flange, wherein the furnace wall is anchored on the furnace shell through an anchoring nail, the furnace roll penetrates through the furnace shell and the furnace wall, two ends of the furnace roll are exposed outside the furnace shell, two ends of the furnace roll are supported on the bearing seat, the bearing seat is fixed on the support, and the support is fixed on the furnace shell; the expansion joint with the flange is sleeved on a furnace roller outside the furnace shell, two ends of the expansion joint with the flange are respectively connected with the bearing seat and the furnace shell flange, the furnace shell flange is fixed on the furnace shell, the fire-resistant sleeve is sleeved on the furnace roller in the furnace shell, and the fire-resistant sleeve is positioned between the furnace wall and the furnace roller.
The furnace wall is a high-temperature resistant refractory brick or a refractory fiber module.
The fire-resistant sleeve is in a ring shape matched with the furnace roller.
The utility model has the advantages that: the phenomenon that the furnace bottom roller is rotated and blocked after being heated and bent can be effectively avoided, and the normal work of the furnace bottom roller is ensured.
Drawings
FIG. 1 is a schematic view of the installation of the present invention;
FIG. 2 is a schematic view showing the up-and-down positioning of a furnace shell flange;
FIG. 3 is a schematic view of the left and right positioning of the furnace shell flange;
FIG. 4 is a schematic view of the furnace shell installation;
FIG. 5 is a schematic view of a bracket mounting;
FIG. 6 is a schematic view of furnace roller installation;
FIG. 7 is a schematic view of the refractory jacket installation;
FIG. 8 is a schematic view of furnace shell flange mounting;
FIG. 9 is a schematic view of the installation of an expansion joint with a flange;
FIG. 10 is a schematic view of a bearing block installation;
in the figure: 1. a bearing seat; 2. a furnace shell; 3. a furnace wall; 4. a furnace roller; 5. a refractory jacket; 6. an expansion joint with a flange; 7. a support; 8. a furnace shell flange; 11. the upper limit center of the furnace shell flange; 12. the lower limit center of a furnace shell flange; 13. the furnace shell flange is positioned at the center up and down; 14. the left limit center of a furnace shell flange; 15. the furnace shell flange right limit center; 16. the furnace shell flange is horizontally positioned at the center.
Detailed Description
The invention will be further explained by way of example with reference to the accompanying drawings.
Referring to the attached drawings 1-10, a heating furnace hearth roll comprises a bearing seat 1, a furnace shell 2, a furnace wall 3, a furnace roller 4, a refractory sleeve 5, an expansion joint 6 with a flange, a support 7 and a furnace shell flange 8, wherein the furnace wall 3 is anchored on the furnace shell 2 through an anchoring nail, the furnace roller 4 penetrates through the furnace shell 2 and the furnace wall 3, two ends of the furnace roller 4 are exposed outside the furnace shell 2, two ends of the furnace roller 4 are supported on the bearing seat 1, the bearing seat 1 is fixed on the support 7, and the support 7 is fixed on the furnace shell 2; the expansion joint 6 with the flange is sleeved on the furnace roller 4 outside the furnace shell 2, two ends of the expansion joint 6 with the flange are respectively connected with the bearing seat 1 and the furnace shell flange 8, the furnace shell flange 8 is fixed on the furnace shell 2, the fire-resistant sleeve 5 is sleeved on the furnace roller 4 in the furnace shell 2, and the fire-resistant sleeve 5 is positioned between the furnace wall 3 and the furnace roller 4.
In this embodiment, referring to fig. 1, the bearing housing 1 is installed outside the heating furnace, the bearing is installed inside the heating furnace for supporting the furnace roller, and the bearing housing 1 is fixed on the bracket 7 by bolts.
The furnace shell 2 is a common steel shell with the thickness of 5mm, a furnace shell flange 8 is arranged at the position where the furnace roller 4 is arranged, and the furnace shell flange 8 is connected with an expansion joint 6 with a flange plate. The furnace shell 2 provides a support or mounting fixing point for the refractory and the upper furnace part in the heating furnace.
High temperature atmosphere in the 3 direct contact stoves of brickwork plays isolated temperature conduction effect, prevents that the accessory on stove interior high temperature flame burns out stove outer covering and the stove outer covering, generally is high temperature resistant firebrick or refractory fiber module, relies on the anchor nail attached on stove outer covering 2.
The furnace roller 4 is used for lifting a heating workpiece such as strip steel or plate blank in the furnace.
The refractory cover 5 is ring-shaped, and its material is refractory material, and the refractory cover overlaps on the stove roller 4, relies on the furnace wall 3 and the stove outer covering 2 to support fixedly, plays mechanical seal effect, reduces the interior high temperature gas of stove and gets into the stove roller bearing frame, prevents that the bearing lubrication from being destroyed.
The expansion joint 6 with the flange plate is hollow and round, the expansion joint 6 with the flange plate is arranged between the furnace shell 2 and the bearing seat 1 and used for connecting the furnace shell flange 8 and the bearing seat 1, the sealing performance of the heating furnace is kept, reducing atmosphere is required in the heating furnace, and meanwhile, the overflow of overheated gas in the furnace is prevented.
The support 7 is made of steel and is fixed on the furnace shell 2 through bolts, and the bearing seat 1 is fixed on the bearing seat support 7 through bolts.
The furnace shell flange 8 is connected with the expansion joint 6 with a flange plate to fix the expansion joint. The furnace shell flange 8 is welded on the furnace shell 2.
The specific installation steps are as follows:
step 1: installing the furnace shell 2, as shown in FIG. 4;
step 2: installing a furnace bottom roller bearing seat support 7, and connecting and installing the furnace bottom roller bearing seat support 7 with the furnace shell 2 by using bolts, as shown in FIG. 5;
and step 3: mounting the furnace roller 4, and penetrating the furnace roller 4 through the furnace shell 2, as shown in FIG. 6;
and 4, step 4: sleeving the refractory sleeves 5 on the furnace rollers 4, as shown in fig. 7;
and 5: the furnace shell flange 8 is sleeved on the furnace roller 4, as shown in fig. 8;
step 6: sleeving the expansion joint 6 with the flange plate on the furnace roller 4, as shown in fig. 9;
and 7: mounting the furnace bottom roller bearing seat 1 on a furnace bottom roller, adjusting the level and the axis of the furnace bottom roller 4, requiring that the levelness of the furnace bottom roller 4 and the verticality of the axis of the furnace bottom roller and the central line of a production line meet the requirement of +/-0.20 mm/m, and fastening the furnace bottom roller bearing seat 1 on a furnace bottom roller bearing seat support 7 by using bolts after the adjustment is finished, as shown in figure 10;
and 8: determining 4 direction limit position centers of a furnace shell flange 8, enabling the furnace shell flange 8 to be in a free state and move in four directions of up, down, left and right, and recording the positions of an upper limit center 11 of the furnace shell flange, a lower limit center 12 of the furnace shell flange, a left limit center 14 of the furnace shell flange and a right limit center 15 of the furnace shell flange;
and step 9: the method comprises the following steps of (1) positioning the upper position and the lower position of a furnace shell flange 8, setting the maximum gap activity amount above and below the furnace shell flange 8 as the distance between an upper limit center 11 and a lower limit center 12, marked as a, a ≦ 30mm, setting the lowest part of the maximum gap activity amount as a point 0, and adjusting the upper position and the lower position of the furnace shell flange at the position of b = a/2+ (2-6 mm), namely the upper positioning center 13 and the lower positioning center of the furnace shell flange, as shown in fig. 2, so that the minimum distance between the bottom of a furnace roller 4 and the inner wall of the furnace shell flange 8 is a-b;
step 10: the left and right positions of a furnace shell flange 8 are positioned, the maximum gap activity between a left limit center 14 of the furnace shell flange and a right limit center 15 of the furnace shell flange is c, c is less than or equal to 30mm, the position of the furnace shell flange is adjusted, and the furnace shell flange is adjusted at a middle position c/2 of the left and right maximum gap activity c, namely a furnace shell flange horizontal positioning center 16, as shown in fig. 3;
step 11: the left and right position location and the up and down position location of the furnace shell flange 8 are adjusted. Comparing c/2 with a-b, satisfying (a-b) ≦ c/2, if the condition is not satisfied, continuing to raise the height of the furnace shell flange until (a-b) ≦ c/2; the purpose of the step is to ensure that the distance between the inner wall of the furnace shell flange and the bottom of the furnace bottom roller in the vertical direction reaches the minimum circumferential distance;
step 12: fixing a furnace shell flange 8, and welding and fixing the furnace shell flange 8 and the furnace shell 2;
step 13: fixing an expansion joint 6 with a flange plate, and fixing two ends of the expansion joint 6 with the flange plate with bolts with a furnace shell flange 8 and a furnace bottom roller bearing seat 1 respectively;
step 14: according to the method in the step 8-step 11, the refractory sleeve 5 is positioned, the refractory sleeve 5 is installed and fixed on the furnace shell by using the anchoring nails, and then the furnace wall 3 is installed on the furnace shell 2 by using the anchoring nails.
Step 15: and (4) finishing the installation of the hearth roller, checking the rotation condition of the hearth roller, and checking whether the rotation is flexible.
The method can prevent the furnace bottom roller from being blocked and incapable of rotating after being heated and bent because the heat deformation amount of the furnace roller 4 is controlled within a proper range by adjusting the positions of the furnace shell flange 8 and the refractory sleeve 5, and because the heat deformation amount of the furnace roller 4 is the deformation amount in the downward direction, the deformation amount is smaller than the possible deformation amount of the furnace roller 4 in other directions of the circumference, and when the furnace roller 4 which is slightly deformed and bent rotates, no part which can block the rotation of the furnace roller 4 exists.
Claims (3)
1. The utility model provides a heating furnace hearth roll which characterized in that: the furnace wall is anchored on the furnace shell (2) through anchoring nails, the furnace roller (4) penetrates through the furnace shell (2) and the furnace wall (3), two ends of the furnace roller (4) are exposed outside the furnace shell (2), two ends of the furnace roller (4) are supported on the bearing seats (1), the bearing seats (1) are fixed on the supports (7), and the supports (7) are fixed on the furnace shell (2); an expansion joint (6) with a flange is sleeved on a furnace roller (4) outside a furnace shell (2), two ends of the expansion joint (6) with the flange are respectively connected with a bearing seat (1) and a furnace shell flange (8), the furnace shell flange (8) is fixed on the furnace shell (2), a refractory sleeve (5) is sleeved on the furnace roller (4) in the furnace shell (2), and the refractory sleeve (5) is positioned between a furnace wall (3) and the furnace roller (4).
2. The hearth roll of a heating furnace according to claim 1, wherein: the furnace wall (3) is a high-temperature resistant refractory brick or a refractory fiber module.
3. The hearth roll of a heating furnace according to claim 1, wherein: the refractory sleeve (5) is in a ring shape matched with the furnace roller (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120609479.4U CN215103412U (en) | 2021-03-25 | 2021-03-25 | Heating furnace hearth roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120609479.4U CN215103412U (en) | 2021-03-25 | 2021-03-25 | Heating furnace hearth roll |
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| Publication Number | Publication Date |
|---|---|
| CN215103412U true CN215103412U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120609479.4U Active CN215103412U (en) | 2021-03-25 | 2021-03-25 | Heating furnace hearth roll |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115368148A (en) * | 2022-07-18 | 2022-11-22 | 包头钢铁（集团）有限责任公司 | Novel method for prolonging service life of furnace roller of roller-hearth heating furnace |
-
2021
- 2021-03-25 CN CN202120609479.4U patent/CN215103412U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115368148A (en) * | 2022-07-18 | 2022-11-22 | 包头钢铁（集团）有限责任公司 | Novel method for prolonging service life of furnace roller of roller-hearth heating furnace |
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