Special clamping fixture for furnace cap refractory bricks

Abstract

The present application relates to the technical field of blast furnace ironmaking, and particularly relates to a special clamping fixture for furnace cap refractory bricks. The clamping fixture comprises a connecting rod and two supporting rods. The two ends of the connecting rod are respectively provided with connecting ports. The one ends of the two supporting rods are respectively provided with butt joints matched with the corresponding connecting ports. The connecting ports and the butt joints are jointly provided with fasteners. The ends of the two supporting rods away from the connecting rod are respectively provided with clamping seats. The clamping seats can axially slide and be locked on the supporting rods. The two clamping seats are respectively used for supporting the upper and lower furnace cap closing silica bricks. The opposite sides of the two clamping seats are provided with rubber blocks. The connecting rod and the supporting rods are connected through the fasteners to realize the angle-adjustable assembly connection. The ends of the supporting rods are respectively provided with the slidable and lockable clamping seats. The upper clamping seat presses the top surface of the outer first layer of silica bricks, and the lower clamping seat supports the bottom of the inner second layer of silica bricks. The clamping fixture can be used for the temporary clamping operation of the furnace cap closing silica bricks with various radii. The clamping fixture can improve the shortcomings of the traditional wooden wedge single-point support, such as the limited adjustment, the easy damage to the brick body and the complicated operation.

Description

Technical Field

[0001] This invention relates to the field of blast furnace ironmaking technology, specifically a special clamping fixture for furnace cap refractory bricks. Background Technology

[0002] The blast furnace hot blast stove is a core heat exchange device in steel production. The furnace cap area adopts a conical constriction structure, with a high-temperature refractory lining formed by layers of silica bricks laid circumferentially. The construction quality of the furnace cap directly affects the long-term operational stability of the hot blast stove. The silica bricks in the furnace cap are constructed using a staggered stacking method. During construction, the first ring of silica bricks at the bottom is laid out completely. After this layer is neatly arranged, the second layer of silica bricks is laid inwards, with the second layer partially overlapping the first layer. After the entire ring of silica bricks is completed, the circumferential mutual compression forms a self-stabilizing structure, preventing the bricks from slipping after the ring is fully closed.

[0003] During the second layer of silica brick laying, the bricks lack reliable temporary support before the mortar hardens, making them prone to shifting and sagging under their own weight. Currently, simple wooden wedges are often used on-site to temporarily restrain the bricks. However, these wedges can only support a single silica brick at a single point, limiting their adjustment space to accommodate different tapers of the furnace cap. It is difficult to flexibly adjust the support position and angle for furnace caps with different curvatures. Furthermore, the small contact area of ​​the wooden wedges leads to concentrated stress, easily causing damage to the edges and corners of the silica bricks. The temporary support assembly and disassembly process is cumbersome, requiring multiple adjustments to the wedge position to match the brick placement height. The overall construction process is subject to many constraints and cannot meet the temporary clamping requirements of silica bricks at the furnace cap closure for different specifications. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a special clamping fixture for furnace cap refractory bricks that can provide temporary support for the brick body before the mortar solidifies.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A special clamping fixture for furnace cap refractory bricks includes a connecting rod and two support rods. The two ends of the connecting rod are respectively provided with connection ports. One end of each of the two support rods is provided with a mating interface that mates with the corresponding connection port. Fasteners are passed through the connection ports and mating interfaces. The ends of the two support rods away from the connecting rod are equipped with locking seats. The locking seats can slide along the axial direction of the support rods and lock. The two locking seats are respectively used to hold the upper and lower layers of furnace cap refractory bricks. Rubber blocks are provided on the opposite sides of the two locking seats.

[0007] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art:

[0008] This clamp features a connecting rod and two support rods forming a support frame. The connecting rod and support rods are connected by fasteners to achieve an adjustable angle. The ends of the support rods are equipped with sliding and locking brackets. The upper bracket presses against the top surface of the outer first layer of silica bricks, while the lower bracket supports the bottom of the inner second layer of silica bricks, forming a two-way clamping support structure across the two layers of silica bricks. During construction, one set of clamps is placed for each silica brick. After the entire circle of silica bricks is laid, the entire set of clamps is removed. It can replace traditional wooden wedges to provide temporary limiting support before mortar solidification. The frame as a whole can flexibly adjust the support angle according to different tapers of the furnace cap. The brackets can slide along the support rods to adapt to the placement height of silica bricks of different specifications. The brackets are equipped with a rubber structure to increase the contact area with the refractory bricks, disperse the supporting force, and reduce the possibility of damage to the brick edges and corners. The overall assembly and disassembly operation is simple and can adapt to the temporary clamping operation of silica bricks with various curvature furnace caps. It improves the shortcomings of traditional wooden wedges, such as limited adjustment of single-point support, easy damage to the bricks, and cumbersome operation.

[0009] As a preferred embodiment, a further technical solution of the present invention is:

[0010] Preferably, the connecting rod includes an upper rod and a lower rod. The lower rod has multiple lower adjustment holes spaced apart along its length, and the upper rod has at least two upper adjustment holes that can be aligned with the lower adjustment holes. Fasteners are inserted into the aligned upper and lower adjustment holes to lock the overall length of the connecting rod. By locking the overall length with the alignment holes and fasteners, the overall span of the support frame can be adjusted, adapting to the clamping conditions of double-layer silica bricks with different radial spacing, and expanding the adaptability range of the clamp.

[0011] Preferably, a positioning groove adapted to the support rod is opened in the middle of the card seat. Multiple sets of positioning holes are opened along the length of the support rod away from the connecting rod. Through holes are opened on both sides of the positioning groove. Fasteners are inserted into the through holes and the corresponding positioning holes. The support point of the upper and lower card seats can be flexibly changed by sliding along the support rod and the groove. It can adapt to refractory bricks of different thicknesses. The locking structure can maintain the stability of the clamping point and prevent displacement during the support process.

[0012] Preferably, the end of the support rod mounting bracket has a beveled structure. The bevel can guide the bracket, making it easy for the bracket to fit into the support rod and slide smoothly, reducing jamming during assembly and adjustment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0014] Figure 2 This is a side view cross-sectional structural diagram of the card holder according to an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the front cross-sectional structure of the card holder according to an embodiment of the present invention;

[0016] Figure 4This is a schematic diagram of the fastener structure according to an embodiment of the present invention;

[0017] Figure 5 This is a schematic diagram of the support rod structure according to an embodiment of the present invention;

[0018] Figure 6 This is a schematic diagram of the lower rod structure according to an embodiment of the present invention;

[0019] Figure 7 This is a schematic diagram of the upper rod structure according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached drawings: support rod 1, positioning hole 11, fastener 2, card seat 3, positioning groove 31, through hole 32, rubber block 4, upper rod 5, upper adjustment hole 51, lower rod 6, lower adjustment hole 61, connection port 7. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. The purpose of this illustration is solely to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0022] As shown in Figures 1-7, this embodiment provides a special clamping fixture for furnace cap refractory bricks, including a connecting rod and two support rods 1. The two ends of the connecting rod are respectively provided with connection ports 7. One end of each of the two support rods 1 is provided with a mating interface that mates with the corresponding connection port 7. Fasteners 2 are passed through the connection port 7 and the mating interface. The fasteners 2 are uniformly made of a single screw with locking nuts located at both ends of the screw. After the screw passes through the connection port 7 and the mating interface in sequence, the nuts at both ends are tightened to complete the compression and locking. Loosening the nuts on both sides can release the fixed state between the holes, which is convenient for changing different alignment holes and adjusting the assembly angle. The ends of the two support rods 1 away from the connecting rod are equipped with a retaining seat 3. The retaining seat 3 can slide and lock along the axial direction of the support rod 1. The two retaining seats 3 are respectively used to hold the upper and lower layers of furnace cap refractory bricks. Rubber blocks 4 are provided on the opposite sides of the two retaining seats 3. The rubber blocks 4 can deform to fit the inclined surface of the refractory bricks to prevent the retaining seats 3 from damaging the brick surface.

[0023] Preferably, the connecting rod includes an upper rod 5 and a lower rod 6. The lower rod 6 has multiple lower adjustment holes 61 spaced along its length. The upper rod 5 has at least two upper adjustment holes 51 that can be aligned with the lower adjustment holes 61. Fasteners 2 are inserted into the aligned upper adjustment holes 51 and lower adjustment holes 61 to lock the overall length of the connecting rod. The structure of the fasteners 2 used here is consistent with the fasteners 2 connecting the connecting rod and the support rod 1. The relative position between the upper rod 5 and the lower rod 6 is locked by the screw and the nuts at both ends. After loosening the nuts and pulling out the screw, the upper rod 5 and the lower rod 6 can be pulled to change the overall length of the connecting rod. After realigning the holes, the overall length of the connecting rod can be fixed. By locking the overall length with the alignment holes and fasteners 2, the overall span of the support frame can be adjusted, adapting to the clamping conditions of double-layer silica bricks with different radial spacing, and expanding the adaptability range of the clamp.

[0024] Preferably, the mounting base 3 has a positioning groove 31 in the middle to accommodate the support rod 1. The section of the support rod 1 away from the connecting rod has multiple sets of positioning holes 11 along its length. Through holes 32 are opened on both sides of the positioning groove 31. Fasteners 2 are inserted into the through holes 32 and the corresponding positioning holes 11. During assembly, the screw of the fastener 2 passes laterally through the through holes 32 on both sides of the groove and the positioning holes 11 of the support rod 1. After the nuts at both ends are tightened, the mounting base 3 and the outer wall of the support rod 1 are clamped, restricting the axial sliding of the mounting base 3. After the nuts are loosened, the groove can slide freely along the support rod 1. By sliding the groove along the support rod 1, the support points of the upper and lower mounting bases 3 can be flexibly changed to accommodate refractory bricks of different thicknesses. The locking structure can maintain the stability of the clamping point and prevent displacement during the support process.

[0025] Preferably, the end of the mounting bracket 3 of the support rod 1 has an inclined structure. The inclined surface can guide the bracket 3, making it easy for the bracket 3 to fit into the support rod 1 and slide smoothly, reducing jamming during assembly and adjustment.

[0026] During construction and assembly, first align the connecting ports 7 at both ends of the connecting rod with the mating interfaces at the ends of the two support rods 1 and insert the fasteners 2 to complete the hinged assembly. The angle between the connecting rod and the support rod 1 can be adjusted by changing the alignment hole position according to the taper of the furnace cap. If it is necessary to change the overall support span, the upper rod 5 and the lower rod 6 of the connecting rod can be pulled to align the upper adjustment holes 51 and the lower adjustment holes 61 of the two rods, and then the fasteners 2 are inserted to lock the total length of the connecting rod. Then, the card holder 3 is inserted into the support rod 1 body from the end with the inclined surface through its own central positioning groove 31. The card holder 3 is slid along the axis of the support rod 1 to the support point that matches the current thickness of the silica brick. Align the through holes 32 on both sides of the groove with the corresponding positioning holes 11 on the support rod 1 and insert the fasteners 2 to lock the card holder 3. After the assembly is completed, press the upper card holder 3 against the top surface of the first layer of silica bricks and the lower card holder 3. Supporting the bottom of the second layer of silica bricks, a set of clamps is arranged for each silica brick. After the entire circle of silica bricks is laid, remove the fasteners 2, separate the brackets 3, support rods 1 and connecting rods, and remove the entire set of clamps.

[0027] The above description is merely a preferred embodiment of the present invention and does not limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A special clamping fixture for furnace cap refractory bricks, characterized in that: It includes a connecting rod and two support rods. The connecting rod has a connection port at both ends. One end of each support rod has a mating interface that mates with the corresponding connection port. Fasteners are inserted between the connection port and the mating interface. The ends of the two support rods away from the connecting rod are equipped with retaining seats. The retaining seats can slide along the axis of the support rod and lock. The two retaining seats are used to support the upper and lower layers of furnace cap sealing silica bricks. Rubber blocks are provided on the opposite sides of the two retaining seats.

2. The special clamping fixture for furnace cap refractory bricks according to claim 1, characterized in that: The connecting rod includes an upper rod and a lower rod. The lower rod has multiple lower adjustment holes spaced apart along its length. The upper rod has at least two upper adjustment holes that can be aligned with the lower adjustment holes. Fasteners are inserted into the aligned upper and lower adjustment holes to lock the overall length of the connecting rod.

3. The special clamping fixture for furnace cap refractory bricks according to claim 1, characterized in that: A positioning groove for the support rod is provided in the middle of the card slot. Multiple positioning holes are provided along the length of the support rod away from the connecting rod. Through holes are provided on both sides of the positioning groove, and fasteners are inserted into the through holes and the corresponding positioning holes.

4. The special clamping fixture for furnace cap refractory bricks according to claim 3, characterized in that: The end of the support rod mounting bracket has a beveled structure.

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