JP3568240B2 - Vacuum degassing tank immersion pipe mounting equipment - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a device for attaching a dipping pipe to a vacuum lower tank reflux pipe in a vacuum degassing tank of a type in which a molten steel reaction tank such as RH and DH is immersed in molten steel, and the present invention relates to other tanks. Applicable to flange mounting.
[0002]
[Prior art]
The number of installed vacuum degassing equipment for molten steel has been steadily increasing due to the recent trend toward upgrading steel products. Representative models include an RH type and a DH type. An immersion pipe is attached to the lower part of the RH type vacuum degassing apparatus via a reflux pipe in order to suck and discharge molten steel to and from a vacuum tank.
Since this immersion pipe is immersed in molten steel, the contact time with molten steel or slag is long, and the refractory is more severely damaged than vacuum chambers and other parts. It is converted into a dip tube with a re-placed object.
[0003]
In this exchange work, after placing a new immersion tube to be exchanged on the gantry, approach the two flange surfaces to mount the reflux tube of the vacuum tank to the immersion tube, and center the joint flange surface of both, Thereafter, each bolt was inserted into the flange bolt hole, and each bolt was individually tightened to complete the mounting.
[0004]
[Problems to be solved by the invention]
The mounting of the immersion tube on the reflux tube by the conventional method is manual and requires a large amount of labor because the bolts must be tightened while compressing the packing sandwiched between the flanges, resulting in an excessive work load. In addition, since each bolt must be tightened one by one at the time of bolt tightening, the tightening force is not equal for each bolt, the variation between the bolts is large, and a single tightening state may occur. Had occurred.
[0005]
[Means for Solving the Problems]
The present invention has been made in order to solve the above-mentioned problem, and the gist of the present invention is to provide a flange receiver having a hydraulic cylinder at a lower portion and a slide in a side plate so as to be positioned so as to face the flange receiver. A vacuum degassing tank immersion pipe mounting facility, characterized in that a crimping device comprising a hook and a lower portion slidable on a buffer member is provided. It is also characterized in that a plurality are provided at equal distances from each other.
[0006]
Embodiment and operation
1 and 2 show the device of the present invention. FIG. 1 is a front view of a mounting device with one part omitted, and FIG. 2 is a plan view with one part also omitted.
1 is an immersion tube, 2 is its flange, 3 is a reflux tube, 4 is its flange, 5 is packing, and 6 is a crimping device that is radially spaced from the shaft core 18 of the immersion tube mounting equipment at an equal distance. Several pieces are arranged on the base 7 so as to surround the periphery of the dip tube. The crimping device 6 is mounted on a buffer member 8 such as a spring so as to be slidable in the axial direction. Inside the crimping device 6, a hydraulic cylinder 9 having a flange receiver 10 at the top is provided. The hook 11 is sandwiched between the side plates 12 and can slide in the side plates around the rotation shaft 13. Reference numeral 14 denotes a fixing pin for fixing the hook 6, and reference numeral 15 denotes a rotation shaft of the flange receiver 10. Reference numeral 16 denotes a handle for sliding the crimping device.
[0007]
Hereinafter, the operation of the apparatus of the present invention will be described in accordance with the operation procedure of mounting a dip tube.
(1) In FIG. 3, the eight crimping devices 6 arranged in the immersion tube mounting equipment pull the handle 16 to receive the immersion tube, move the shaft 16 toward the outer side, and place the immersion tube in this state. 1 is suspended and transported by a crane (not shown) or the like, lowered into the immersion pipe mounting facility, and temporarily held at a predetermined position.
(2) Next, the flange receiver 10 is pushed forward by pressing the handle 16.
(3) In this state, the immersion tube 1 is lowered, and the immersion tube 11 is supported on the lower surface of the flange 2 by the individual flange receivers 10.
[0008]
(4) In FIG. 4, a refractory metal packing 5 made of a material such as C-Si is placed on the flange 2.
(5) Next, the reflux pipe 3 of the vacuum degassing tank is lowered from above, and the lower surface of the flange 4 is held at a predetermined distance from the upper surface of the flange 2.
(6) Next, the immersion pipe 1 of the vacuum degassing tank is raised via a wheel (not shown), and the upper surface of the flange 2 is pressed against the lower surface of the flange 4 via the packing 5.
(7) In this state, the hook 11 is raised and hooked on the upper surface of the flange 4.
(8) Then, the fixing pin 14 is inserted into the pin hole 17 to fix the hook 11.
(9) Next, the eight hydraulic cylinders 9 are simultaneously operated to push up the flange receiver 10, sandwich the packing 5 between the two flanges, and tighten tightly (FIG. 1).
(10) In this state, a bolt is attached to a bolt insertion hole penetrating both flanges 2 and 4, and a nut is tightened (not shown).
(11) After the attachment of the immersion pipe to the reflux pipe is completed, the pipe is lifted by a crane and transported to a predetermined place.
[0009]
【The invention's effect】
Since the present invention is configured as described above, the one-side tightening of the flange bolt, which has conventionally been a problem, has been greatly improved. Further, the packing is firmly and uniformly held between the flanges by tightening with the hydraulic cylinder and the hook, and the inconvenience in the contact surface between the two is eliminated. Further, since the crimping device is slidable in the axial direction, it also has an effect of being able to follow the size change of the immersion tube.
[Brief description of the drawings]
FIG. 1 is a view showing a state in which a flange is fixed by the apparatus of the present invention. FIG. 2 is a plan view of FIG. 1. FIG.
FIG. 4 is an explanatory view of a submerged pipe mounting process by the apparatus of the present invention (2).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Immersion pipe 2 Immersion pipe flange 3 Reflux pipe 4 Reflux pipe flange 5 Packing 6 Crimping device 7 Base 8 Buffer member 9 Hydraulic cylinder 10 Flange receiver 11 Hook 12 Side plate 13 Rotating shaft 14 Fixed pin 15 Rotating shaft 16 Handle 17 Pin hole 18 Shaft core of immersion pipe mounting equipment

Claims (2)

A crimping device comprising a flange receiver having a hydraulic cylinder at a lower portion and a hook slidable in the side plate and positioned so as to face the flange receiver, and slidable on a buffer member at a lower portion thereof. The installation equipment for immersion pipes in vacuum degassing tanks, characterized in that: 2. A vacuum degassing tank immersion pipe mounting equipment according to claim 1 , wherein a plurality of crimping devices are provided radially at an equal distance from the shaft core.

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