JPH0741230B2 - Pipe cleaning device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-pipe cleaning device for efficiently removing hard adhered substances such as carbon that are adhered to the inner surface of a pipe and are difficult to remove by high pressure water.

[0002]

2. Description of the Related Art Carbon having a thickness of 4 to 6 cm is fixed to the entire inner surface of an overhead pipe of an FCC facility in an oil refining facility. Overhead tube has an inner diameter of 400 to 900 mm
Yes, at the time of the periodic inspection, the worker rides on the lifting platform that is hung up and down by a rope and carries the picking machine, and operates the picking machine in 2-3 shifts to remove carbon. There is.

[0003]

The length of the horizontal pipe portion is about 1
In the case of an overhead pipe with a length of 8 m and a vertical pipe length of about 28 m, it takes about 2 to 3 weeks to remove the carbon in the pipe with a shaving machine in a two-shift system. Also, the work is narrow,
It must be done in a hot pipe, and the carbon dust that is generated is stuffy, difficult, and harsh. Moreover, its complete removal is very difficult.

[0004]

According to the present invention, the above-described work is performed by a machine rather than manually, and it has a nozzle on the outer periphery and is connected to a high-pressure water feed hose.
It consists of a rotating body that rotates in reaction to eject high-pressure water supplied by a water supply hose from an outer peripheral nozzle, and a hammering member that is provided with a claw on the outer surface and is provided on the rotation trajectory of the ejected water ejected by the nozzle. It is characterized by

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, 10 has a nozzle 11 on the outer circumference and is connected to a water supply hose 12 for high pressure water to supply high pressure water supplied by the water supply hose to the nozzle 11 on the outer circumference.
Reference numeral 20 denotes a hammering member which has a claw on its outer surface and which is provided on the rotation locus of jetted water ejected from the nozzle 11 and which is rotated by a reaction force ejected from the nozzle.

The rotating body 10 is a winch 1 which is pneumatically operated.
The upper end is supported by a bearing on an upper support 15 connected to the end of a wire rope 14 to be unwound or wound up by 3 and is concentrically rotatable, and the lower end is similarly supported by a lower part. The body 16 is supported by bearings and can rotate concentrically. Then, the water supply cylinder 17 whose upper end communicates with the nozzle 11 penetrates the center of the lower support 16 downward, and the water supply hose 12 is connected to the lower end thereof. As shown in FIG. 3, two nozzles 11 are provided in the tangential direction opposite to the water supply cylinder 17, whereby the rotating body 10 is rotated in the arrow direction by the reaction of the jet water spouted from both nozzles 11. To do. When super high-pressure water is sent to the water supply hose 12 with a super high-pressure pump of 750 kg / cm ² × 60 vertical / min, 195 PS, the rotating body 10 rotates 10 to 20 times per minute.

A sleeve 22 is fitted and fixed to the lower end of the wire rope 14. This sleeve is provided with four upper arms 23 radially protruding from the outer circumference at equal intervals in the circumferential direction. Further, the lower support 16 of the rotating body is provided with four lower arms 24 radially protruding from the outer periphery of the lower end portion at equal intervals in the circumferential direction. The upper arm 23 and the lower arm 24 have the same orientation and are aligned in the vertical direction. The hammering member 2 described above
Reference numeral 0 denotes an annular shape, and four pieces are arranged on the rotation trajectory of the spouted water ejected from the nozzle 11 of the rotating body 10. The upper end of each one of them is attached to the upper arm 23, and the lower end is attached to the lower arm 24.
Are connected by. The claws 2 of each hammering member 20
1 projects from the left and right of the outer surface. Then, the water jetted from the nozzle 11 traverses the annular center portion of the hammering member 20 in the left and right diametrical directions, and at that time, the water flow strikes the back of the portion where the claw 21 projects.

In this embodiment, a part of the ball 26 projects from the tip, and immediately after that, an outer cylinder 28 having a collar 27 is placed on the upper arms 23 and the lower arms 24 from the tip, and the outer cylinder 28 and the upper arm are covered. , And the coil spring 2 between the lower arm
9 is interposed, the outer cylinder is pushed outward in the radial direction by this coil spring, and the balls 26 are brought into contact with the inner surface of the pipe 1 to be cleaned. In order to prevent the outer cylinder 28 from coming out of each arm, an axial long hole 30 is opened in the outer cylinder, and a bolt 31 protruding from the long hole 30 to the outside of the outer cylinder is fixed to each arm. The outer cylinder 28 has a ball 26 partially protruding from the tip.
When the carbon that is in contact with the inner surface of the pipe 1 and adheres to the inner surface of the pipe is thick, it is pulled back against the coil spring 29, and the whole device suspended by the wire rope 14 is prevented from swinging largely inside the pipe. It is for. The upper and lower rings 25 'of the chain 25 that connects the upper and lower parts of the hammer ring member 20 to the upper arm 23 and the lower arm 24 are fitted to the upper arm and the outer cylinder 28 attached to the lower arm, Tsuba 27,
It is movable along the outer cylinder with the head of the bolt 31. The upper arm 23 and the lower arm 24 described above and the outer cylinder 28 that is fixed by covering the upper arm 23 and the lower arm 24 are steady rests that also serve to connect the hammering members 20. A similar steady rest 32 may be constructed by providing an arm and covering the outer cylinder. Further, a sleeve having a similar arm may be fixed to the water supply hose 12, and the arm may be covered with an outer cylinder to form a similar steadying device 32.

To remove carbon adhering to the inside of the overhead pipe 1, a winch mount 13 'is installed on the upper end of the vertical pipe portion 2 of the overhead pipe, and the winch 13 and the wire rope 14 are used to rotate the rotor 10 and the upper support. 15, the lower support 16 is suspended in the pipe, and the high pressure pump car 4 is provided with a water supply hose 12
The other end of the vertical pipe part is connected to the water pipe 17 by penetrating from the horizontal pipe part 3 communicating with the lower end of the vertical pipe part, and then the whole device is pulled up to the upper end part in the vertical pipe part 2 by a winch, and the Start water supply and gradually lower the entire equipment.

A high-pressure water stream is jetted from the nozzle 11 by the start of the water supply, and the rotating body 10 is heated by 10 to 10 in response to the jet water.
Rotate 20 times / minute. Due to the rotation, as described above, the water flow crosses the central portion of the hammering member 20, and when hitting the hammering member, the claw 21 protruding from the outer surface thereof is strongly pressed against the carbon, and crosses the annular inside of the hammering member. Sometimes the water stream hits the carbon directly.
The action of pressing the claw 21 strongly against the carbon and the action of the water flow directly irradiating the carbon repeatedly cause a crack to be generated in the carbon by the claw 21, and the high pressure water penetrates into the carbon layer from the generated crack to remove the carbon. Float from the inner surface of the pipe and break it. Therefore, the carbon fragments separated from the inner surface of the pipe and crushed fall into the horizontal pipe portion 3. The falling pieces are collected in a sedimentation separation tank 5 using a scraping tool or the like, water is separated from carbon, and the carbon is put in a drum or the like.

As described above, the vertical pipe portion 2 is gradually lowered to remove carbon in the pipe, and when the apparatus reaches the horizontal pipe portion 3, the water hose is pulled by the pump car 4 while unwinding the wire rope with the winch. Alternatively, an operator manually pulls the water supply hose, gradually moves the device in the horizontal pipe portion, and similarly, carbon which adheres to the pipe is peeled off to be broken pieces and removed. In this case, since the downward steadying device 32 comes into contact with the inner surface of the lower peripheral portion of the pipe and separates the rotating body 10, the nozzle 11, and the hammering member 20 from the lower peripheral surface, the rotating body 10 and the nozzle No. 11 rotates without any trouble and peels off carbon to form fragments.

[0012]

As is apparent from the above, according to the present invention, the worker can be freed from the difficult and harsh work performed by operating the picking machine in the pipe, and the high pressure ejected from the rotating nozzle. Using the water jetted from, the nail of the hammering member is strongly pressed against the carbon to generate a crack, and high-pressure water that directly irradiates the carbon penetrates into the carbon layer from the crack, and the carbon is peeled off while crushing it from the inner surface of the pipe. And can be efficiently removed and washed. Of course, the present invention can be used not only for the overhead pipe but also for scale removal and cleaning of the inner surface of a large-diameter pipe, and since the apparatus itself is operated by the water pressure of high-pressure water, it can be cleaned without power.

[Brief description of drawings]

FIG. 1 is a partially omitted front view showing a main part of an embodiment of an apparatus of the present invention.

FIG. 2 is a view taken along the line AA of FIG. 1 showing a relationship between a rotating body and a hammering member.

FIG. 3 is a plan view showing a relationship between a nozzle and a hammering member.

FIG. 4 is an explanatory diagram showing a situation where cleaning is performed.

[Explanation of symbols]

 1 Pipe to be Washed 4 High Pressure Pump Car 10 Rotating Body 11 Nozzle 12 Water Supply Hose 13 Winch 14 Wire Rope 15 Upper Support 16 Lower Support 20 Hammering Member 21 Claw 25 Chain

Claims (1)

[Claims] 1. A rotary body which has a nozzle on its outer circumference, is connected to a high-pressure water feed hose, and rotates in reaction to eject high-pressure water supplied by the water feed hose from a nozzle on the outer circumference, and a claw on its outer surface, An in-pipe cleaning device comprising: a hammering member provided on a rotation locus of ejected water ejected from the nozzle.