A furnace bottom roller changing device

Abstract

The present invention relates to a furnace bottom roller changing device, which belongs to the technical field of steel strip production equipment, and solves the technical problem that the existing furnace bottom roller changing device is difficult to operate. The furnace bottom roller changing device includes a hanger and a lifting lug, the lifting lug is connected to the top of the hanger, and the hanger has a first side and a second side opposite to each other; a fixed frame for mounting the furnace bottom roller, which is connected to the bottom of the hanger and is located on the first side of the hanger; a support block, which is arranged at the lower part of the hanger; a counterweight, which is slidably mounted on the support block, the counterweight is located on the second side of the hanger, and the lifting lug is located between the hanger and the fixed frame; a driving mechanism, which is connected between the counterweight and the support block to drive the counterweight to move back and forth between the first side and the second side. When the furnace bottom roller changing device of the structure replaces the furnace bottom roller, there is no need to worry about the lifting lug and the hanger colliding with the pipeline above the tunnel furnace, and it is more convenient to adjust the posture of the furnace bottom roller on it, so it is simpler to operate and the efficiency of replacing the furnace bottom roller is higher.

Description

Technical Field

[0001] The invention belongs to the technical field of steel strip production equipment, and in particular relates to a furnace bottom roll changing device. Background Art

[0002] The roller bottom tunnel heating furnace is a key equipment to support the transportation of steel billets. It is an open flame heating furnace. When the steel billets from the continuous casting machine pass through the furnace rollers, the iron oxide scale on the steel billets will stick to the furnace bottom rollers and form "nodules". When the nodules are not serious, thick steel plates can be loaded and run at high speed to hit the furnace rollers to make them fall off. When the nodules are serious enough to affect the transportation of steel batches, the furnace must be stopped and the rollers must be replaced. In addition, since the furnace bottom rollers are used in the furnace under high temperature for a long time, the furnace bottom rollers must be stopped and the rollers must be replaced when they are damaged by oxidation. Therefore, the furnace bottom rollers in the tunnel furnace need to be replaced irregularly. Since the weight of the furnace bottom rollers is heavy, the furnace bottom rollers need to be replaced with the help of a roller changing device. However, the furnace bottom roller changing device in the prior art has the technical problem of being difficult to operate and resulting in low roller changing efficiency. Summary of the invention

[0003] The invention provides a furnace bottom roller changing device, which is used to solve the technical problem that the furnace bottom roller changing device in the prior art has great difficulty in operation.

[0004] The present invention is achieved through the following technical solution: a furnace bottom roller changing device, comprising:

[0005] a hanger and a lifting lug, the lifting lug being connected to a top end of the hanger, and the hanger having opposing first and second sides;

[0006] A fixing frame, used for mounting the furnace bottom roller, the fixing frame being connected to the bottom of the hanging frame, and the fixing frame being located at a first side of the hanging frame;

[0007] A support block, arranged at the lower part of the hanger;

[0008] a counterweight block, slidably mounted on the support block, the counterweight block being located on the second side of the hanger, and the lifting lug being located between the hanger and the fixing frame;

[0009] A driving mechanism is connected between the counterweight block and the support block to drive the counterweight block to move back and forth between the first side and the second side of the hanger.

[0010] Further, in order to better implement the present invention, the support block is a straight long strip block, and the length direction of the support block is parallel to the first direction, and the first direction is the moving direction of the counterweight block;

[0011] The counterweight block is provided with a first sleeve, and the first sleeve is sleeved on the support block.

[0012] Furthermore, in order to better realize the present invention, the driving mechanism includes a screw and a seat body with a threaded through hole, the axial direction of the threaded through hole is parallel to the first direction, the seat body is fixed to the support block, the screw is screwed in the threaded through hole, and one end of the screw is rotatably connected to the counterweight block.

[0013] Furthermore, in order to better realize the present invention, the seat body is located between the counterweight block and the hanger, a bearing seat is provided on a side wall of the counterweight block close to the seat body, a bearing is installed in the bearing seat, and one end of the lead screw is inserted into the inner hole of the bearing.

[0014] Furthermore, in order to better implement the present invention, the other end of the lead screw extends out of the seat body, and the other end of the lead screw is provided with a block for clamping a wrench.

[0015] Furthermore, in order to better realize the present invention, the hanger includes an upper bracket and a lower bracket, the upper portion of the lower bracket is provided with a plurality of first blind holes evenly distributed along a second direction, the second direction being a direction perpendicular to the moving direction of the counterweight block, the lower portion of the upper bracket is provided with a second blind hole, the hanger also includes a first bolt and a first nut, the first bolt is passed through the second blind hole and one of the first blind holes and is fastened by the first nut, the lifting ear is connected to the upper bracket, and the fixing frame and the support block are both connected to the lower bracket.

[0016] Furthermore, in order to better realize the present invention, the lower bracket includes a first straight rod, an oblique rod and a second straight rod, the length direction of the first straight rod is parallel to the second direction, the length direction of the second straight rod is parallel to the first direction, the oblique rod connects the first straight rod and the second straight rod, the first blind hole is opened on the first straight rod, the fixing frame is connected to an end of the second straight rod away from the first straight rod, and the support block is arranged on the first straight rod.

[0017] Furthermore, in order to better realize the present invention, a plurality of third blind holes are opened on the fixed frame along the first direction, a fourth blind hole is opened on the second straight rod, and the furnace bottom roller changing device also includes a second bolt and a second nut, and the second bolt is passed through the fourth blind hole and one of the third blind holes and is fastened by the second nut.

[0018] Furthermore, in order to better realize the present invention, the upper bracket includes a third straight rod and a fourth straight rod, the length direction of the third straight rod is parallel to the first direction, the length direction of the fourth straight rod is parallel to the second direction, one end of the third straight rod is connected to the fourth straight rod, a second sleeve is provided on the lifting ear, the second sleeve is sleeved on the third straight rod, the second blind hole is opened on the fourth straight rod, and one end of the third straight rod away from the fourth straight rod is located on the second side of the fixing frame.

[0019] Furthermore, in order to better implement the present invention, the lifting ear is provided with a plurality of lifting holes, and the plurality of lifting holes are evenly distributed in the first direction.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The furnace bottom roller changing device provided by the present invention includes a hanger, a lifting ear, a fixed frame, a support block, a counterweight block and a driving mechanism. The lifting ear is connected to the top end of the hanger, and the hanger has a first side and a second side opposite to each other. The fixed frame is used to install the furnace bottom roller. The fixed frame is installed at the bottom of the hanger and is located on the first side of the hanger. At this time, the furnace bottom roller installed on the fixed frame is located on the first side of the hanger. The support block is arranged at the lower part of the hanger, and the counterweight block is slidably installed on the support block. The counterweight block is located on the second side of the hanger. In this way, the counterweight block and the furnace bottom roller are respectively located on two opposite sides of the hanger, and the above-mentioned lifting ear is located between the hanger and the fixed frame. At this time, the lifting ear is located on the second side of the fixed frame, that is, on the second side of the furnace bottom roller. In the furnace bottom roller changing device of the above structure, the counterweight block and the fixing frame for fixing the furnace bottom roller are respectively located on two opposite sides of the hanger, and the lifting lug is located at the top of the hanger and between the fixing frame and the counterweight block. In this way, by means of the lever principle, the furnace bottom roller can maintain the best posture to enter and exit the tunnel furnace, and the lifting lug and the hanger are located on the side of the second side of the furnace bottom roller, that is, in the process of the furnace bottom roller entering and exiting the tunnel furnace, the lifting lug and the hanger do not need to move to the top of the tunnel furnace, so they will not cause collisions to the gas pipeline above the tunnel furnace, and the above driving mechanism can drive the counterweight block to move back and forth between the first side and the second side, so that the furnace bottom roller can be adjusted to the best posture more conveniently. Therefore, the furnace bottom roller changing device provided by the present invention does not need to worry about the lifting lug and the hanger damaging the pipeline above the tunnel furnace when the furnace bottom roller is sent in or taken out, and it is easier to adjust the posture of the furnace bottom roller carried thereon, and it is simpler to operate, thereby improving the furnace bottom roller changing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a structural schematic diagram of a furnace bottom roller changing device in an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of the connection structure between the counterweight block and the driving structure in an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of the connection structure between the first straight rod and the fourth straight rod in an embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of the connection structure between the fixing frame and the first straight rod in an embodiment of the present invention.

[0027] In the figure:

[0028] 1-hanging bracket; 101-first straight rod; 102-second straight rod; 103-third straight rod; 104-fourth straight rod; 105-diagonal rod; 106-first bolt; 107-first nut; 2-lifting ear; 21-lifting hole; 3-fixed frame; 4-bottom roller; 5-support block; 6-counterweight block; 7-screw; 8-seat body; 9-first sleeve; 10-bearing seat; 11-bearing; 12-block; 13-second bolt; 14-second nut; 16-second sleeve; 17-tunnel furnace. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] Embodiment 1:

[0031] This embodiment provides a furnace bottom roller replacement device, which is used to solve the technical problem that the furnace bottom roller replacement device in the prior art is difficult to operate. Specifically, the lifting lug of the furnace bottom roller replacement device in the prior art is arranged above the middle of the furnace bottom roller it carries. In the process of conveying the furnace bottom roller into the tunnel furnace, since the lifting lug is located above the middle of the furnace bottom roller, and the furnace bottom roller needs to enter the bottom of the tunnel furnace with its entire body, the lifting lug and the hanger connected to the lifting lug need to be moved above the tunnel furnace. Therefore, the lifting lug and the hanger are easy to collide with the gas pipeline on the top of the tunnel furnace. Therefore, when using the replacement device in the prior art to replace the furnace bottom roller, the operator needs to drive the furnace bottom roller in and out of the tunnel furnace very carefully and slowly, otherwise it is easy to cause collision damage to the Meiqi pipeline, which leads to the technical problems of the difficulty of operation and low roller replacement efficiency of the furnace bottom roller replacement device in the prior art.

[0032] The furnace bottom roller changing device provided in this embodiment comprises a hanger 1, a hanger 2, a fixing frame 3, a support block 5, a counterweight block 6 and a driving mechanism. Among them:

[0033] The hanger 1 is a frame structure, specifically, a steel frame structure. The above-mentioned lifting lug 2 is connected to the top of the hanger 1. The lifting lug 2 is provided with a lifting hole 21 for connecting with a lifting device (such as a crane), that is, the hook of the lifting device can act on the lifting hole 21 of the lifting lug 2 to transport the entire furnace bottom roller changing device. The hanger 1 is a three-dimensional structure. Therefore, in addition to the top and the bottom, the hanger 1 has at least a first side and a second side opposite to each other. The above-mentioned fixing frame 3 is used to install the furnace bottom roller 4. Specifically, the fixing frame 3 is the same as the furnace bottom roller fixing frame structure in the prior art, so it will not be described in detail here. The fixing frame 3 is installed at the bottom of the hanger 1 and is located on the first side of the hanger 1. At this time, the furnace bottom roller 4 installed on the fixing frame 3 is located on the first side of the hanger 1. For ease of explanation, the first side in this embodiment can be understood as the right side of the hanger 1, and the second side can be understood as the left side of the hanger 1, that is, the above-mentioned fixed frame 3 and the furnace bottom roller 4 loaded thereon are located on the left side of the above-mentioned hanger 1.

[0034] The above-mentioned support block 5 is welded or set at the lower part of the above-mentioned fixed frame 3 by screws or integral molding, and the above-mentioned counterweight block 6 is installed on the support block 5, and the counterweight block 6 is located on the second side of the above-mentioned hanger 1, that is, the counterweight block 6 is located on the left side of the above-mentioned hanger 1. At this time, the above-mentioned counterweight block 6 and the furnace bottom roller 4 are respectively located on the left and right sides of the above-mentioned hanger 1, and the above-mentioned lifting ear 2 is located between the hanger 1 and the fixed frame 3. At this time, the lifting ear 2 is actually also located on the left side of the fixed frame 3 and the furnace bottom roller 4 thereon.

[0035] In the furnace bottom roller changing device of the above structure, the counterweight 6 and the fixing frame 3 for fixing the furnace bottom roller 4 are respectively located on two opposite sides of the hanger 1, and the lifting lug 2 is located at the top of the hanger 1 and between the fixing frame 3 and the counterweight 6. In this way, by means of the lever principle, the furnace bottom roller 4 can maintain the best posture (i.e., horizontal posture) to enter and exit the tunnel furnace 17, and the lifting lug 2 and the hanger 1 are located to the right of the furnace bottom roller 4, that is, during the process of the furnace bottom roller 4 entering and exiting the tunnel furnace 17, the lifting lug 2 and the hanger 1 do not need to move to the top of the tunnel furnace 17, so they will not cause collisions to the gas pipeline above the tunnel furnace 17. The above driving mechanism can drive the counterweight 6 to move back and forth between the first side and the second side (i.e., the left and right directions), so that the furnace bottom roller 4 can be adjusted to the best posture more conveniently. Therefore, the furnace bottom roller changing device provided by the present invention does not need to worry about the lifting lugs 2 and the hanger 1 damaging the pipeline above the tunnel furnace 17 when sending the furnace bottom roller 4 into or taking it out of the tunnel furnace 17, and it is easier to adjust the posture of the furnace bottom roller 4 carried thereon, and the operation is simpler, thereby improving the efficiency of changing the furnace bottom roller 4.

[0036] As an optional implementation of this embodiment, the support block 5 in this embodiment is a straight long strip block, one end of which is connected to the lower left side wall of the above-mentioned hanger 1, and the support block 5 extends to the left, that is, the support block 5 as a whole is located on the left side of the hanger 1, so that the length direction of the above-mentioned support block 5 is parallel to the first direction, and the first direction is the moving direction of the counterweight block 6 driven by the driving mechanism. It should be noted that the support block 5 in this embodiment is a steel plate, which has sufficient strength to support the counterweight block 6. A first sleeve 9 is provided on the above-mentioned counterweight block 6, and the first sleeve 9 is welded to the bottom wall of the counterweight block 6 and the axial direction of the first sleeve 9 is the above-mentioned first direction, and the first sleeve 9 is sleeved on the above-mentioned support block 5, so that the counterweight block 6 can only translate in the first direction, that is, close to or away from the above-mentioned fixed frame 3. When the counterweight 6 is close to the fixed frame 3, the counterweight 6 is close to the hanger 1, so the torque applied by the counterweight 6 on the hanger 1 becomes smaller. When the counterweight 6 is away from the fixed frame 3, the counterweight 6 is away from the hanger 1, so the torque applied by the counterweight 6 on the hanger 1 becomes larger. By adjusting the position of the counterweight 6, the posture of the furnace bottom roller 4 located on the other side of the hanger 1 can be adjusted. It can be understood that, as another implementation of this embodiment, a guide rail can also be laid on the support block 5 along the length direction of the support block 5, a slider can be slidably installed on the guide rail, and the counterweight 6 can be installed on the slider, so that the sliding of the counterweight 6 on the support block 5 can also be achieved.

[0037] As an optional implementation of this embodiment, the driving mechanism in this embodiment includes a lead screw 7 and a seat body 8 with a threaded through hole, the axial direction of the threaded through hole is parallel to the first direction, and the seat body 8 is welded or connected to the support block 5 by screws, the lead screw 7 is screwed in the threaded through hole, and one end of the lead screw 7 is rotatably connected to the counterweight 6. In this way, when the lead screw 7 is rotated, the counterweight 6 can be driven to translate on the support block 5. It can be understood that the driving mechanism in this embodiment can also be a device that can output linear motion, such as a cylinder, a hydraulic cylinder or a linear motor.

[0038] As a more preferred implementation of this embodiment, in this embodiment, a block 12 is provided at the other end of the lead screw 7, and the block 12 is welded to the other end of the lead screw 7, so that the user can rotate the lead screw 7. Specifically, the user can clamp the block 12 with a wrench, and then rotate the wrench to drive the lead screw 7 to rotate. Of course, the lead screw 7 can also be driven to rotate by a motor.

[0039] As a specific implementation of this embodiment, the seat body 8 in this embodiment is installed between the counterweight block 6 and the hanger 1, and a bearing seat 10 is welded or integrally formed on the outer wall of the counterweight block 6 on one side close to the hanger 1, and a bearing 11 is installed in the bearing seat 10, and one end of the screw 7 is inserted into the inner hole of the bearing 11, so as to realize the rotational connection between the screw 7 and the counterweight block 6. It can be understood that the matching mode between one end of the screw 7 and the inner hole of the bearing 11 is an interference fit. As another implementation of this embodiment, in this embodiment, a box body with an open top can also be welded on the outer wall of the side of the counterweight block 6 close to the hanger 1, and a baffle is provided at one end of the screw 7, and a notch is opened on the side wall of the box body close to the hanger 1, and the baffle is inserted in the box body, and the screw 7 passes through the notch, and the baffle can rotate in the box body, and the screw 7 can rotate in the notch, and the outer diameter of the baffle is larger than the caliber of the notch.

[0040] As an optional implementation of this embodiment, the hanger 1 in this embodiment can be a straight beam, and the length direction of the straight beam is set to be perpendicular to the moving direction of the above-mentioned counterweight block 6.

[0041] As a better implementation of this embodiment, the hanger 1 in this embodiment includes an upper bracket and a lower bracket, a second blind hole is provided at the lower part of the upper bracket, a first blind hole is provided at the upper part of the lower bracket, the number of the first blind holes is several, and the several first blind holes are evenly distributed along the second direction, and the second direction is a direction perpendicular to the moving direction of the counterweight 6 (i.e., the up and down direction). The hanger 1 in this embodiment also includes a first bolt 106 and a first nut 107, the first bolt 106 is inserted into the second blind hole and one of the first blind holes, and the first bolt 106 is screwed with the first nut 107 and fastened by the first nut 107, that is, the first bolt 106 is screwed with the first nut 107 after passing through the second blind hole and one of the first blind holes, thereby connecting the upper bracket and the lower bracket. Through this structure, the user can choose to use a certain first blind hole to cooperate with the first bolt 106 as needed, so as to adjust the height of the entire hanger 1, so that the furnace bottom roller changing device provided in this embodiment can be applied to more scenes to replace the furnace bottom roller 4. In addition, the above-mentioned lifting lug 2 is connected to the upper bracket, and the fixing frame 3 and the supporting block 5 are both connected to the lower bracket.

[0042] As an optional implementation of this embodiment, the lower bracket in this embodiment includes a first straight rod 101, a second straight rod 102 and an inclined rod 105. The length direction of the first straight rod 101 is parallel to the second direction, and the length direction of the second straight rod 102 is parallel to the first direction. The inclined rod 105 connects the first straight rod 101 and the second straight rod 102. As an optimal implementation of this embodiment, the second straight rod 102 in this embodiment is located obliquely below the first straight rod 101. The first blind hole is opened on the upper part of the first straight rod 101, the fixing frame 3 is connected to the end of the second straight rod 102 away from the first straight rod 101, and the support block 5 is arranged in the middle of the first straight rod 101. Through this structure, the fixing frame 3 can be located away from the first straight rod 101, so that the fixing frame 3 can be installed on the fixing frame 3. It is easier to extend under the tunnel furnace 17 to take and place the furnace bottom roller 4. It should be noted that the first straight rod 101 , the second straight rod 102 and the diagonal rod 105 are all structural members made of steel, and the diagonal rod 105 is connected to the first straight rod 101 and the second straight rod 102 by welding.

[0043] As an optional implementation of the present embodiment, a plurality of third blind holes are opened on the fixing frame 3 in the present embodiment along the first direction, a fourth blind hole is opened at a position of the second straight rod 102 away from the first straight rod 101, the second bolt 13 is passed through the fourth blind hole and one of the third blind holes and is fastened by the second nut 14, that is, the second bolt 13 passes through the fourth blind hole and one of the third blind holes and is screwed to the second nut 14, so that the fixing frame 3 is installed on the second straight rod 102 by using the second nut 14, and by selecting different third blind holes to cooperate with the second bolt 13, the installation position of the fixing frame 3 on the second straight rod 102 can be adjusted.

[0044] As an optional implementation of this embodiment, the upper bracket in this embodiment includes a third straight rod 103 and a fourth straight rod 104, the length direction of the third straight rod 103 is parallel to the first direction, the length direction of the fourth straight rod 104 is parallel to the second direction, and one end of the third straight rod 103 is welded or integrally formed on the fourth straight rod 104, and the third straight rod 103 is located at the top of the fourth straight rod 104. A second sleeve 16 is sleeved on the lifting ear 2, and the second sleeve 16 is sleeved on the third straight rod 103, so as to achieve the purpose of installing the lifting ear 2 on the top of the hanger 1, and the user can adjust the position of the second sleeve 16 on the third straight rod 103 as needed, so as to adjust the position of the lifting ear 2 installed on the top of the hanger 1. Therefore, the furnace bottom roller changing device provided in this embodiment can more flexibly adjust the furnace bottom roller 4 installed on the fixing frame 3 to the optimal posture. In this embodiment, the second blind hole is opened at the lower part of the fourth straight rod 104, and the end of the third straight rod 103 away from the fourth straight rod 104 is located on the second side of the fixed frame 3, that is, the third straight rod 103 does not extend out of the right side of the fixed frame 3, thereby ensuring that when the furnace bottom roller 4 is replaced, the third straight rod 103 will not even be above the tunnel furnace 17.

[0045] As an optional implementation of the present embodiment, in the present embodiment, the number of the hanging holes 21 arranged on the above-mentioned lifting ears 2 is not limited, and the plurality of hanging holes 21 are evenly distributed in the above-mentioned first direction, so that the user can use one of the hanging holes 21 or more to connect the hook of the lifting equipment, which has higher flexibility, and by selecting different hanging holes 21, it can be more suitable for furnace bottom rollers 4 of different weights, and it can also be easier to adjust the furnace bottom roller 4 to the optimal posture.

[0046] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A furnace bottom roller changing device, characterized in that: include: A hanger and a lifting ear, wherein the lifting ear is connected to the top end of the hanger, a lifting hole is provided on the lifting ear, the number of the lifting holes is several, and the several lifting holes are evenly distributed in the first direction, the hanger has a first side and a second side opposite to each other, the hanger comprises an upper bracket and a lower bracket, a plurality of first blind holes evenly distributed along a second direction are provided on the upper portion of the lower bracket, the second direction is a direction perpendicular to the moving direction of the counterweight, a second blind hole is provided on the lower portion of the upper bracket, the hanger further comprises a first bolt and a first nut, the first bolt is passed through the second blind hole and one of the first blind holes and is fastened by the first nut, the lifting ear is connected to the upper bracket, and the fixing frame and the support block are both connected to the lower bracket; The upper bracket includes a third straight rod and a fourth straight rod, the length direction of the third straight rod is parallel to the first direction, the length direction of the fourth straight rod is parallel to the second direction, one end of the third straight rod is connected to the fourth straight rod, the lifting ear is provided with a second sleeve, the second sleeve is sleeved on the third straight rod, the second blind hole is opened on the fourth straight rod, and one end of the third straight rod away from the fourth straight rod is located on the second side of the fixing frame; The lower bracket includes a first straight rod, an oblique rod and a second straight rod, the length direction of the first straight rod is parallel to the second direction, the length direction of the second straight rod is parallel to the first direction, the oblique rod connects the first straight rod and the second straight rod, the first blind hole is opened on the first straight rod, the fixing frame is connected to an end of the second straight rod away from the first straight rod, and the support block is arranged on the first straight rod; A fixing frame, used for installing the furnace bottom roller, the fixing frame is connected to the bottom of the hanger, the fixing frame is located on the first side of the hanger, a plurality of third blind holes are opened on the fixing frame along the first direction, a fourth blind hole is opened on the second straight rod, the furnace bottom roller changing device further comprises a second bolt and a second nut, the second bolt is passed through the fourth blind hole and one of the third blind holes and is fastened by the second nut; A support block, arranged at the lower part of the hanger; a counterweight block, slidably mounted on the support block, the counterweight block being located on the second side of the hanger, and the lifting lug being located between the hanger and the fixing frame; A driving mechanism is connected between the counterweight block and the support block to drive the counterweight block to move back and forth between the first side and the second side of the hanger.

2. A furnace bottom roller changing device according to claim 1, characterized in that: The support block is a straight long strip block, and the length direction of the support block is parallel to the first direction, and the first direction is the moving direction of the counterweight block; The counterweight block is provided with a first sleeve, and the first sleeve is sleeved on the support block.

3. A furnace bottom roller changing device according to claim 2, characterized in that: The driving mechanism includes a lead screw and a seat body with a threaded through hole, the axial direction of the threaded through hole is parallel to the first direction, the seat body is fixed to the support block, the lead screw is screwed in the threaded through hole, and one end of the lead screw is rotatably connected to the counterweight block.

4. A furnace bottom roller changing device according to claim 3, characterized in that: The seat body is located between the counterweight block and the hanger. A bearing seat is arranged on a side wall of the counterweight block close to the seat body. A bearing is installed in the bearing seat. One end of the lead screw is inserted into the inner hole of the bearing.

5. A furnace bottom roller changing device according to claim 4, characterized in that: The other end of the lead screw extends out of the seat body, and the other end of the lead screw is provided with a block for clamping a wrench.

Images