JPS6310209B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is a high-temperature working machine that removes slag and base metal adhering to the mouth of a converter. The present invention relates to a cooling structure for a working device having a working attachment.

(Prior art) For example, in a steel mill, removing slag and metal (hereinafter referred to as deposits) adhering to the mouth of a converter, and removing bricks when replacing refractory bricks on the inner wall of a converter or ladle. Work under high heat such as stripping is performed periodically or as needed.

Conventionally, such high-heat work has been done manually by workers, such as by scraping off deposits with the tip of a log held in their hands, which is extremely inefficient and extremely dangerous. It was hot.

Therefore, there has been a need for the development of a high-temperature work machine that can efficiently and safely perform this type of work using mechanical force from a position away from the workpiece. The structure of this high-heat work machine consists of a long-reach work arm and a work attachment that scrapes and removes deposits at the tip of this work arm, on a machine stand that is installed at a distance from the workpiece. One possibility is to attach a working device. However, in the case of this working device, there is a problem in cooling the tip of the device, such as the tip of the working arm, the working attachment, and the operating mechanism of this attachment, which are directly exposed to high heat.

As a cooling means for the tip of the device, it is possible to interrupt the operation at regular intervals and wait for natural cooling, or to inject water from outside, but this will reduce work efficiency due to the interruption of work. Further, as the working time becomes longer, the down time of the converter, etc. becomes longer, and the temperature of the converter, etc. decreases, causing problems such as increased heat loss and deterioration of the operating rate.

(Object of the Invention) Therefore, the present invention provides a cooling structure for a working device in a high-temperature working machine, which can efficiently cool the tip portion of the working device by an internal water cooling system.

(Structure of the Invention) The present invention is characterized in that a working arm having a hollow tip block at its tip is attached to the machine base, and a working attachment is rotated via a pivot to the tip block of the working arm. A high heat tool is movably mounted and configured such that the working attachment is driven by an actuating mechanism having a cylinder provided within the tip block and a connecting rod connecting the cylinder and the working attachment. In the working machine, the working arm has a first cooling water passage that circulates around the tip block.
a cooling system flow path, a second cooling system flow path that serves as an outbound and return path for cooling water passing through the tip block toward the work attachment;
Water supply and drainage pipes for both cooling system flow paths are provided, and an outgoing communication path is connected to the axis of the work attachment, one end communicating with the interior of the attachment, and the other end communicating with the outgoing path of the second cooling system flow path. , one end is inside the attachment and the other end is inside the attachment.
A return path communicating with each return path of the cooling system flow path is provided, and a cooling water flow path for the working mechanism extends between the connecting rod of the operating mechanism and the shaft connecting the connecting rod and the working attachment. A cooling structure for a working device in a high-temperature working machine has one end of the cooling water flow path communicated with the interior of the work attachment and the other end communicated with the drain pipe.

(Example) In this example, the present invention is applied to a working device of a high-temperature working machine used for scraping and removing the above-mentioned deposits or bricks.

1 is a machine base, and this machine base 1 has a crawler-type lower running body 1a, similar to a base machine such as a hydraulic excavator.
The rotating upper body 1c is mounted on the lower traveling body 1a via a swing bearing 1b, and the working device A is mounted on the upper part of the upper rotating body 1c.

This working device A consists of a boom B as a working arm which is configured to be extendable and retractable in a telescopic manner by both outer and inner boom bodies 2 and 3, a boom support body 4 that supports this boom 2, and a boom B that supports the boom B. It is composed of a ripper 5 for scraping off deposits and the like as a work attachment attached to the tip (the tip of the inner boom body 3).

The lower end of the boom support 4 is pivotally connected to the bracket 15 of the upper revolving structure 1c via a horizontal axis 16, and the boom support 4 can be rotated up and down about the horizontal axis 16 by means of a hoisting cylinder _C1 . That's what I do. This boom support 4 has a cylindrical boom holder 41 on the upper part, and as shown in FIG. The drum is fitted rotatably around the axis of the drum while being supported by a plurality of support rollers 43. In FIGS. 3 and 4, m is a motor for rotationally driving this rolling drum 6, and is attached to the outer periphery of the boom holder 41. A pinion gear g ₁ is attached to the rotating shaft of this motor m, and this pinion gear g ₁ is meshed with a ring gear g ₂ fixed to the outer circumference of the outer ring of the rolling drum support bearing 42, so that the rotation of the motor m is controlled by these gears. The signal is transmitted to the rolling drum 6 via g ₁ and g ₂ . The outer boom body 2 of the boom B is formed into a square tube shape, and the outer boom body 2 is fitted onto the rolling drum 6 so as to be able to rotate integrally around the boom axis, and is fixed in the axial direction by a fixing means (not shown). are doing.

The inner boom body 3 is made up of a main body portion 3a that is slidably fitted into the outer boom body 2 in the axial direction, and a hollow tip block 3b is integrally provided at the tip of the main body portion 3a. The main body part 3a has four pipes 31a~
31d is formed into a rectangular tube shape corresponding to the outer boom body 2 with four corner portions, and each pipe 31a to 31d of this main body portion 3a is connected to eight guide rollers 2 at two locations on the front of the outer boom body 2.
1. It is supported by... This guide roller 2
1 supports the inner boom body 3 so as to be slidable in the axial direction, and the rotation of the outer boom body 2 is transmitted to the inner boom body 3, so that both boom bodies 2 and 3 rotate integrally around the boom axis. In Fig. 3, C ₂ is a boom telescopic cylinder provided at the axial center of the boom B. Its cylinder bottom is fixed inside the rear end of the outer boom body 2, and the rod end is attached inside the inner boom main body 3a. Bracket 3
It is stopped through 2. Due to this telescopic operation of the cylinder _C2 , the inner boom body 3 slides in the axial direction, and the boom B is extended and retracted.

The tip block 3b of the inner boom body 3 includes a box-shaped portion 3b ₁ fixed to the tip of the main body portion 3a, and a pair of lipper attachment portions 3b ₂ , 3b ₂ protruding from the tip of the box-shaped portion 3b ₁ in a bifurcated manner. This ripper mounting part 3
A ripper 5 is rotatably mounted (angle adjustable) between b ₂ and 3b ₂ via a pivot 51. Reference numeral 7 denotes a ripper operating mechanism for driving the ripper 5, and a ripper cylinder 71 is provided at the axial center of the inner boom body, spanning the main body part 3a and the tip block box-shaped part _3b1 .
It consists of a connecting rod 72 connected to the rod end of the ripper cylinder 71, and an idler link 73 installed between the connecting rod 72 and the inner surface of the tip block box-shaped portion _3b1 . It is attached to the top of 5. 74 is a shaft connecting this ripper 5 and the connecting rod 72; 75
76 is a shaft that connects the connecting rod 72 and the idler link 73, and 76 is the shaft that connects the idler link 73 to the box-shaped portion 3b ₁
This is the shaft that fastens it to.

The ripper 5 has a straight front claw 5a and a rear claw 5b that is bent backwards.
a and 5b can be used appropriately.

Here, the operation of this working device A will be explained with reference to FIG. 10, taking as an example the case of removing deposits from the converter mouth. , the mouth of converter D that was tipped over
After directing it toward D ₁ , the ripper 5 is attempted to be removed by the operations of telescoping, elevating, and rotating the boom B around the boom axis by the boom telescoping cylinder C ₂ , the luffing cylinder C ₁ , and the boom rotation motor m. The ripper 5 is set at a position and attitude corresponding to the deposit E, and the angle of the ripper 5 is adjusted by the ripper operating mechanism 7. After this, the ripper 5 is rotated by the ripper operating mechanism 7, or the ripper 5 is rotated and the boom B is rotated.
In combination with the reduction operation, the deposits E are removed from the furnace mouth _D1
scrape it off.

The work of scraping off refractory bricks when repairing the inner wall of a converter or a ladle can also be carried out in the same manner as described above.

Next, the tip of the working device, that is, the boom B
The cooling structure of the tip portion of the inner boom body 3, the ripper 5, and the ripper operating mechanism 7 will be explained.

Among the four pipes 31a to 31d constituting the main body 3a of the inner boom body 3, the _lower left pipe 31a in FIG. is used as the first drain pipe, the pipe 31c on the lower right is used as the second water supply pipe for cooling rippers, etc., and the pipe 31d on the upper left is used as the second drain pipe. A supply and drainage hose (not shown) is connected to the rear end of each of these pipes (duct lines) 31a to 31d. This hose is led out of the boom B along with the hydraulic piping of the boom telescoping cylinder C ₂ and the lipper cylinder 71 via a swivel joint J shown in FIGS. 1 to 3 provided at the rear end of the outer boom body 2. , connected to a water supply source such as a pump or a drainage system.

As shown in FIG. 7, the box-shaped portion _3b1 of the tip block 3b has a double box structure with a space S formed around it, and this space S is partitioned by a number of partition walls 33... As a result, a large number of tunnel-like channels are formed. In addition, in FIG. 7, the box-shaped part 3
b Illustration of the ripper operating mechanism 7 in ₁ is omitted.
This flow path includes a first cooling system that cools the periphery of the box-shaped portion 3b ₁ , a ripper mounting portion 3b ₂ , 3b _2, and a ripper 5.
and a second cooling system for cooling the ripper operating mechanism 7. That is, in FIG. 7, 35... is the cooling water outgoing path of the second cooling system, and 36 is the cooling water outgoing path of the second cooling system.
...indicates the same return path, and all other flow paths 3
4... are the flow paths of the first cooling system.

The first cooling system flow paths 34 are formed in a meandering shape so as to surround the box-shaped portion _3b1 and communicate with each other at one end, with the starting end connected to the first water supply pipe 31a and the terminal end connected to the first drain pipe. The passages 31b are communicated with each other via headers 37. In FIG. 7, reference numerals 38 and 39 are auxiliary channels for communicating the separated channels 34 and 34 with each other. Also, in Figure 7, ○† straw paper 竸紊

Claims (1)

[Claims] 1. A working arm having a hollow tip block at its tip is attached to the machine base, a working attachment is rotatably attached to the tip block of the working arm via a pivot, and this working attachment is attached to the tip of the working arm. In a high-temperature working machine configured to be driven by an actuation mechanism having a cylinder provided in a block and a connecting rod that connects the cylinder and a work attachment, the work arm has the tip block attached to the work arm. a first cooling system flow path that serves as a flow path for cooling water circulating around the workpiece; a second cooling system flow path that serves as an outbound and return path for cooling water passing through the tip block toward the work attachment; and water supply and drainage pipes for both the second cooling system flow paths, one end communicating with the pivot of the work attachment, one end communicating with the inside of the attachment, and the other end communicating with the outgoing path of the second cooling system flow path. An outgoing communication passage and a return communication passage whose one end communicates with the interior of the attachment and whose other end communicates with the return passage of the second cooling system flow path are provided, and a connecting rod of the operating mechanism and a connecting rod and a working attachment are provided. A cooling water flow path for the operating mechanism is provided across the shaft connecting the work attachment, and one end of the cooling water flow path is connected to the inside of the work attachment, and the other end is connected to the drain pipe. Cooling structure for working equipment in high-temperature working machines.