Blast furnace tuyere

Abstract

The utility model relates to the technical field of blast furnace air supply equipment, especially to a blast furnace air supply branch pipe, which comprises a middle section, a lower section and a compensator, the compensator is installed between the middle section and the lower section, the compensator comprises two flanges, a corrugated pipe is installed between the middle parts of the two flanges, a hydraulic cylinder is hinged between the edges of the two flanges through a connecting mechanism, and the hydraulic cylinder is uniformly provided with four around the corrugated pipe. When the angle between the middle section and the lower section needs to be adjusted, the relative inclination of the two flanges can be adjusted by controlling the extension and retraction of the hydraulic cylinder, the four hydraulic cylinders in each compensator are controlled in linkage, the adjustment precision is high, the staff is easy to operate, and the installation working condition of the large deformation of the hot air pipeline after aging is effectively adapted.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace air supply equipment, and in particular to a blast furnace air supply branch pipe. Background Technology

[0002] Currently, the bellows compensators of blast furnace air supply devices in China are generally adjusted manually, that is, by adjusting the position of the nut on the screw, thereby changing the spatial angle and distance between the upper and lower flanges. This adjustment operation has problems such as large workload, poor on-site working environment and low adjustment accuracy.

[0003] Especially at the air outlets where the hot air duct has deformed significantly after aging, the installation angle has changed considerably due to the deformation. Therefore, when replacing the middle section of the branch pipe later, a large amount of space angle needs to be adjusted to complete the installation. Due to the structural limitations of the corrugated pipe compensator, the installation of the air supply device is difficult and poses a production safety hazard. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the present invention provides a blast furnace air supply branch pipe.

[0005] The technical solution for a blast furnace air supply branch pipe provided by this utility model is as follows:

[0006] A blast furnace air supply branch pipe includes a middle section, a lower section, and an compensator. The compensator is installed between the middle section and the lower section. The compensator includes two flanges, an upper flange and a bellows pipe installed between the middle of the two flanges. A hydraulic cylinder is hinged between the edges of the two flanges through a connecting mechanism. Four hydraulic cylinders are evenly arranged around the bellows.

[0007] By adopting the above technical solution, when it is necessary to adjust the angle between the middle section and the lower section, the relative tilt angle of the upper and lower flanges can be adjusted by controlling the extension and retraction of the hydraulic cylinder. The four hydraulic cylinders in each compensator are linked for control, resulting in high adjustment accuracy and easy operation for staff. This effectively adapts to the installation conditions where hot air pipelines deform greatly after aging.

[0008] Preferably, the connecting mechanism includes a connecting lug one that is vertically fixed to the surface of the flange, a connecting lug two that is installed at the end of the hydraulic cylinder, and a pin that passes through the connecting lug one and the connecting lug two.

[0009] By adopting the above technical solution, the connecting ear plate one, connecting ear plate two and the pin shaft cooperate with each other to achieve the effect of hinged connection between the hydraulic cylinder and the flange. The connection mechanism has a simple structure and is easy to manufacture.

[0010] Preferably, the connecting mechanism includes a first connecting ear plate, a second connecting ear plate, and a pin. The pin passes between the first connecting ear plate and the second connecting ear plate. A C-shaped clamp is vertically fixed to the end of the first connecting ear plate. The C-shaped clamp is detachably fastened to the edge of the flange. A through-hole is vertically opened on the C-shaped clamp. Multiple through holes are provided on the flange. Bolt pairs for fixing the C-shaped clamp to the flange are inserted in the through holes and the through holes.

[0011] By adopting the above technical solution, the connecting ear plate is fixed to the C-type clamp plate. The C-type clamp plate is fastened to the edge of the flange and fixed by bolts. If the hydraulic cylinder or connecting mechanism needs to be disassembled later, the hydraulic cylinder or the hydraulic cylinder together with the connecting mechanism can be easily removed without damaging the flange. The connecting mechanism can be reused, effectively reducing the cost of use.

[0012] Preferably, the top and bottom plates of the C-type clamp are respectively threaded with set screws, which are then tightened and fixed to the flange.

[0013] By adopting the above technical solution, if there is a large gap between the C-type clamp and the flange due to manufacturing errors, and this gap affects the adjustment accuracy, then set screws are threaded onto the top and bottom plates of the C-type clamp respectively. The set screws are used to tighten and fix with the flange so that the C-type clamp and the flange form a synchronized whole.

[0014] Preferably, the C-shaped clamp has two clearance holes, which correspond to any two adjacent through holes on the flange.

[0015] By adopting the above technical solution and using two bolt pairs installed into two adjacent through holes, the fixing effect of the C-shaped clamp can be further improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the blast furnace air supply branch pipe of Embodiment 1 of this utility model.

[0017] Figure 2 This is a structural schematic diagram of the compensator according to Embodiment 1 of this utility model.

[0018] Figure 3 This is a top view of the compensator of Embodiment 2 of this utility model.

[0019] Figure 4 yes Figure 3 Sectional view along the AA direction.

[0020] Figure 5 This is a schematic diagram of the connection mechanism in Embodiment 2 of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Middle section; 2. Lower section; 3. Compensator; 30. Flange; 300. Through hole; 31. Bellows; 32. Hydraulic cylinder; 33. Connecting mechanism; 330. Connecting ear plate one; 331. Connecting ear plate two; 332. Pin; 333. C-type clamp; 3330. Displacement hole; 334. Bolt pair; 335. Set screw. Detailed Implementation

[0022] The following combination Figures 1-5 The present invention will be described in further detail below.

[0023] This utility model discloses a blast furnace air supply branch pipe. Example 1

[0024] Reference Figure 1 and Figure 2 The blast furnace air supply branch pipe includes a middle section 1, a lower section 2, and an compensator 3. One compensator 3 is installed between the middle section 1 and the lower section 2. The compensator 3 includes two flanges 30, an upper and a lower flange 30, a bellows 31 installed between the middle of the two flanges 30, and four hydraulic cylinders 32 are arranged between the edges of the two flanges 30. The four hydraulic cylinders 32 are evenly distributed around the bellows 31. The hydraulic cylinders 32 are hinged to the flanges 30 through a connecting mechanism 33.

[0025] Reference Figure 1 and Figure 2 The connecting mechanism 33 includes a connecting lug 330 that is vertically fixed to the surface of the flange 30, a connecting lug 331 that is installed at the end of the hydraulic cylinder 32, and a pin 332 that passes through the connecting lug 330 and the connecting lug 331.

[0026] The implementation principle of Embodiment 1 of this utility model is as follows: When it is necessary to adjust the angle between the middle section 1 and the lower section 2, the relative tilt angle of the upper and lower flanges 30 can be adjusted by controlling the extension and retraction of the hydraulic cylinder 32. The four hydraulic cylinders 32 in each compensator 3 adopt linkage control, which has high adjustment accuracy, is easy for operators to operate, and effectively adapts to the installation conditions of large deformation after the aging of hot air pipeline. Example 2

[0027] Reference Figures 3-5 The difference between this embodiment and embodiment 1 is that, in this embodiment, a C-shaped clamp 333 is vertically fixed to the end of the connecting ear plate 330. The C-shaped clamp 333 is detachably fastened to the edge of the flange 30. Multiple through holes 300 are evenly arranged around the center of the flange 30. The through holes 300 are holes that come with the flange 30 from the factory. Two clearance holes 3330 are vertically opened on the C-shaped clamp 333, and the two clearance holes 3330 correspond to two adjacent through holes 300 respectively.

[0028] Reference Figures 3-5 A bolt pair 334 is detachably inserted into the clearance hole 3330 and the through hole 300. The C-type clamp 333 is fixed to the flange 30 by the bolt pair 334. If there is a large gap between the C-type clamp 333 and the flange 30 due to manufacturing error, and the gap affects the adjustment accuracy, two set screws 335 are threaded on the top plate and the bottom plate of the C-type clamp 333 respectively. The set screws 335 are used to abut and fix with the flange 30 so that the C-type clamp 333 and the flange 30 form a synchronous whole.

[0029] The implementation principle of Embodiment 2 of this utility model is as follows: In this embodiment, it is not necessary to weld and fix the connecting ear plate 330 to the flange 30. Instead, the connecting ear plate 330 is fixed to the C-shaped clamp 333. The C-shaped clamp 333 is fastened to the edge of the flange 30 and fixed by bolt pair 334 and set screw 335. If it is necessary to disassemble the hydraulic cylinder 32 or the connecting mechanism 33 in the future, the hydraulic cylinder 32 or the hydraulic cylinder 32 together with the connecting mechanism 33 can be easily removed without causing damage to the flange 30. Moreover, the connecting mechanism 33 can be reused, effectively reducing the cost of use.

[0030] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A blast furnace air supply branch pipe, characterized in that: It includes a middle section (1), a lower section (2) and a compensator (3). The compensator (3) is installed between the middle section (1) and the lower section (2). The compensator (3) includes two flanges (30) and a bellows (31) is installed between the middle of the two flanges (30). A hydraulic cylinder (32) is hinged between the edges of the two flanges (30) through a connecting mechanism (33). Four hydraulic cylinders (32) are evenly arranged around the bellows (31).

2. The blast furnace air supply branch pipe according to claim 1, characterized in that: The connecting mechanism (33) includes a connecting lug one (330) that is vertically fixed to the surface of the flange (30), a connecting lug two (331) that is installed at the end of the hydraulic cylinder (32), and a pin (332) that passes through the connecting lug one (330) and the connecting lug two (331).

3. The blast furnace air supply branch pipe according to claim 1, characterized in that: The connecting mechanism (33) includes a first connecting ear plate (330), a second connecting ear plate (331), and a pin (332). The pin (332) passes between the first connecting ear plate (330) and the second connecting ear plate (331). A C-shaped clamp (333) is vertically fixed to the end of the first connecting ear plate (330). The C-shaped clamp (333) is detachably fastened to the edge of the flange (30). A through-hole (3330) is vertically opened on the C-shaped clamp (333). A plurality of through holes (300) are provided on the flange (30). Bolt pairs (334) for fixing the C-shaped clamp (333) to the flange (30) are passed through the through holes (300) and the through holes (3330).

4. The blast furnace air supply branch pipe according to claim 3, characterized in that: The top plate and bottom plate of the C-type clamp (333) are respectively threaded with a set screw (335), and the set screw (335) is tightened and fixed with the flange (30).

5. The blast furnace air supply branch pipe according to claim 3 or 4, characterized in that: The C-type clamp (333) has two clearance holes (3330), which correspond to any two adjacent through holes (300) on the flange (30).

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