Device for quickly pulling out broken drill rod in iron notch of blast furnace tapping machine

Abstract

The utility model discloses a device for quickly pulling out a broken drill rod in an iron notch of a blast furnace tapping machine. The device comprises a forcing device and a pre-tightening device, the forcing device comprises a forcing rod, one end of the forcing rod is fixedly provided with a metal shaft sleeve coplanar with the forcing rod, and a key groove is formed in an inner ring of the metal shaft sleeve. The pre-tightening device is clamped in the key groove, and a knocking panel is arranged at the bottom of the end, close to the iron notch, of the pre-tightening device. When the broken drill rod is pulled out, the broken drill rod is sleeved with the metal shaft sleeve, the knocking panel of the pre-tightening device is knocked through a sledge hammer, the pre-tightening device and the broken drill rod are clamped tightly, knocking is continued, and the drill rod can be pulled out rapidly. By using the device, the pulling-out time of the broken drill rod can be controlled to be 3-5 minutes, the labor intensity of personnel is reduced, and the situation that the time for pulling out the broken drill rod is long, and the tapping punctuality rate is affected is avoided. In addition, due to the fact that the stressed area of the knocked part is large, the hammer sliding phenomenon does not exist, and the stress application rod is long and has a certain distance from the main channel of the blast furnace, the slipping phenomenon caused by unstable standing of the personnel is prevented, and the burning accident of the personnel is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary equipment for blast furnace taphole machines, and particularly relates to a device for quickly pulling out a broken drill rod inside the taphole of a blast furnace taphole machine. Background Art

[0002] At present, due to the single taphole iron tapping of the 450m³ blast furnace, the interval time is relatively short (30 - 35min). During daily production, if a drill rod breaks inside the taphole of the taphole machine, usually a pipe wrench is first used to clamp the broken drill rod, and then a sledgehammer is used to strike the pipe wrench to pull out the broken drill rod inside the taphole passage. This operation method has the following technical problems: 1. During the knocking process, the operator may be accidentally injured due to the slippage of the pipe wrench. When the broken drill rod cannot be pulled out, oxygen burning operation is used to burn off the broken large drill rod so that the taphole passage can be opened for iron tapping. This series of drill rod pulling processes causes the iron tapping to be delayed by 5 - 15 minutes, affecting the on-time iron tapping rate, resulting in blast furnace air choking and affecting production. 2. In addition, since the pipe wrench is close to the main trough of the blast furnace when pulling out the drill rod, it may cause a burning accident. And if the drill rod is pulled out in the later stage of the main trough pouring, there may be a risk that the personnel's standing position is unstable and they may slip and fall, causing a serious burning accident. 3. During the oxygen burning process, it is easy to burn out the taphole passage, causing furnace door fluctuations and affecting production. Content of the Utility Model

[0003] The utility model provides a device for quickly pulling out a broken drill rod inside the taphole of a blast furnace taphole machine to solve the above technical problems and achieve the purpose of quickly pulling out the broken drill rod inside the taphole of the blast furnace taphole machine, being able to operate safely and not affecting production.

[0004] To achieve its purpose, the utility model adopts the following technical scheme:

[0005] A device for quickly pulling out a broken drill rod inside the taphole of a blast furnace taphole machine includes a force - adding device and a pre - tightening device;

[0006] The force - adding device includes a force - adding rod. One end of the force - adding rod is fixedly provided with a metal bushing, and the metal bushing is sleeved on the outer periphery of the broken drill rod; the metal bushing and the force - adding rod are coplanar, and a keyway is provided on the inner circle of the metal bushing;

[0007] The pre - tightening device is clamped in the keyway on the inner circle of the metal bushing, and a knocking panel is provided at the bottom of one end of the pre - tightening device close to the taphole of the blast furnace taphole machine.

[0008] As a further improvement of the technical scheme of the utility model, the cross - section of the pre - tightening device is a right - angled trapezoid, and a slideway is provided on the right - angled surface of the trapezoid, and the slideway is slidably connected with the keyway on the inner circle of the metal bushing.

[0009] Furthermore, a snap ring extending from the top to the bottom is provided on the pre - tightening device, and the snap ring is sleeved between the inner circle and the outer circle of the metal bushing.

[0010] Further, a percussion panel is provided on the bottom surface of the right trapezoid.

[0011] Further, the force - increasing rod is a steel pipe with a diameter of φ20mm.

[0012] Further, the outer diameter of the metal bushing is φ75mm, the inner diameter is 45mm, the width of the keyway is 20mm, and the depth is 15mm.

[0013] The beneficial effects of the utility model compared with the prior art are as follows:

[0014] 1. When breaking a drill pipe in the iron notch channel of the taphole opener, only need to adjust the position of the pre - tightening device in the keyway of the metal bushing, sleeve the metal bushing on the broken drill pipe, and use a sledgehammer to strike the percussion panel of the pre - tightening device, so that the pre - tightening device is clamped with the broken drill pipe. Continuing to strike the percussion panel of the pre - tightening device can quickly pull out the drill pipe. Using the device of the utility model, the time for pulling out the broken drill pipe can be controlled within 3 - 5 minutes, reducing the labor intensity of workers, and avoiding the influence of the long time for pulling out the broken drill pipe on the punctuality rate of tapping. In addition, since the percussion part is the percussion panel, the stress area is large, there is no phenomenon of the hammer slipping, and because the force - increasing rod is long and has a certain distance from the main trough of the blast furnace, it prevents the phenomenon of workers standing unsteadily and slipping, and avoids the occurrence of personal scalding accidents.

[0015] 2. The device of the utility model has high reliability, avoiding the phenomenon of damaging the iron notch channel due to the inability to pull out the broken drill pipe from the iron notch, being able to better maintain the iron notch mud package, making the iron notch stable, ensuring the qualification rate of the iron notch, and avoiding the situation of the blast furnace being stuffy due to the long time of pulling out the drill pipe, escorting the safe, stable and smooth operation of the blast furnace.

[0016] 3. The pre - tightening device of the utility model is provided with a snap ring extending from the top to the bottom, and the snap ring is sleeved between the inner and outer circles of the metal bushing, making the metal bushing and the pre - tightening device form an integral structure, preventing the risk of personal injury caused by the fall of the pre - tightening device during the process of pulling out the broken drill pipe.

[0017] 4. The utility model has a simple structure, ingenious design, simple manufacturing and maintenance, low manufacturing cost, high safety and reliability, long service life, and has significant social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the device for quickly pulling out a broken drill pipe in the iron notch of the blast furnace taphole opener of the utility model;

[0019] Figure 2 It is a working state diagram of the device for quickly pulling out a broken drill pipe in the iron notch of the blast furnace taphole opener of the utility model;

[0020] The meanings of the reference numerals are as follows: 1. Force - increasing rod; 2. Pre - tightening device; 3. Metal bushing; 4. Percussion panel; 5. Broken drill pipe; 6. Keyway; 7. Snap ring. Detailed implementation mode

[0021] The structure and working process of the device for quickly pulling out the broken drill rod inside the taphole of the blast furnace taphole machine of the present utility model will be further described below in conjunction with the accompanying drawings.

[0022] As Figure 1-2 shown, a device for quickly pulling out a broken drill rod inside the taphole of a blast furnace taphole machine includes a force - adding device and a pre - tightening device 2.

[0023] The force - adding device includes a force - adding rod 1. One end of the force - adding rod 1 is welded with a metal bushing 3, and the metal bushing 3 is sleeved on the outer periphery of the broken drill rod 5; the metal bushing 3 and the force - adding rod 1 are coplanar, and a keyway 6 is provided on the inner ring of the metal bushing 3.

[0024] The cross - section of the pre - tightening device 2 is a right - angled trapezoid with an upper base of 15 mm, a lower base of 40 mm, and a height of 200 mm. A slideway (prior art, not shown in the figure) is provided on the right - angled surface of the trapezoid, and the slideway is slidably connected with the keyway 6 on the inner ring of the metal bushing 3. A percussion panel 4 is arranged on the bottom surface of the right - angled trapezoid. The percussion part changes from a point to a surface, increasing the force - bearing area and preventing the hammer from slipping.

[0025] Specifically, a snap ring 7 extending from the top to the bottom is provided on the pre - tightening device 2, and the snap ring 7 is sleeved between the inner ring and the outer ring of the metal bushing 3, so that the metal bushing and the pre - tightening device form an integral structure, preventing the risk of personal injury caused by the fall of the pre - tightening device during the process of pulling out the broken drill rod.

[0026] Specifically, the force - adding rod 1 is a steel pipe with a length of 1000 mm and a diameter of φ20 mm, which is convenient for obtaining materials locally and reducing costs.

[0027] Specifically, the outer diameter of the metal bushing 3 is φ75 mm, the inner diameter is 45 mm, the width of the keyway 6 is 20 mm, and the depth is 15 mm.

[0028] When pulling out the broken drill rod 5, only need to adjust the position of the pre - tightening device 2 in the keyway 6 of the metal bushing 3 and sleeve the metal bushing 3 on the broken drill rod 5, and use a sledgehammer to strike the percussion panel 4 of the pre - tightening device 2, on the side close to the taphole. First, gently strike for pre - tightening, and then gradually increase the striking force, so that the broken drill rod 5 can be quickly pulled out from the taphole passage. After pulling out the broken drill rod 5, strike the pre - tightening device 2 in the reverse direction to remove the metal bushing 3 from the broken drill rod 5.

Claims

1. A device for quickly pulling out a broken drill rod in the tapping machine of a blast furnace, characterized in that: It includes a force adding device and a pre-tightening device (2); The force adding device comprises a force adding rod (1), one end of which is fixedly provided with a metal sleeve (3), the metal sleeve (3) being sleeved on the outer circumference of the broken drill rod (5); the metal sleeve (3) and the force adding rod (1) are coplanar, and the inner ring of the metal sleeve (3) is provided with a keyway (6); The pre-tightening device (2) is clamped in the keyway (6) of the inner ring of the metal sleeve (3), and a knocking panel (4) is provided at the bottom of one end of the pre-tightening device close to the iron mouth of the blast furnace opening machine.

2. A device for quickly extracting a broken drill rod in the iron mouth of a blast furnace opening machine as claimed in claim 1, characterized in that: The cross section of the preload device (2) is a right-angled trapezoid, and a slideway is provided on the right-angled surface of the trapezoid. The slideway is slidably connected to the keyway (6) of the inner ring of the metal sleeve (3).

3. A device for quickly extracting a broken drill rod in the iron mouth of a blast furnace opening machine as claimed in claim 2, characterized in that: The pre-tightening device (2) is provided with a clamping ring (7) extending from the top to the bottom, and the clamping ring (7) is sleeved between the inner ring and the outer ring of the metal sleeve (3).

4. A device for quickly extracting a broken drill rod in the iron mouth of a blast furnace opening machine as claimed in claim 2, characterized in that: The right-angled trapezoidal bottom surface is provided with a knocking panel (4).

5. A device for quickly extracting a broken drill rod in the iron mouth of a blast furnace opening machine according to any one of claims 1 to 4, characterized in that: The reinforcing rod (1) is a steel pipe with a diameter of 20 mm.

6. A device for quickly extracting a broken drill rod in the iron mouth of a blast furnace opening machine according to any one of claims 1 to 4, characterized in that: The outer ring diameter of the metal sleeve (3) is φ75 mm, the inner ring diameter is 45 mm, and the keyway (6) is 20 mm wide and 15 mm deep.

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