JPS5830805B2 - Nozzle rotation structure in fireproof material spraying equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a nozzle rotation structure in a refractory material spraying device used for repairing electric furnaces, converters, ladles, tundishes, and other various furnaces, and aims to improve spraying efficiency. It is something.

Conventionally, nozzles generally used in fireproof spraying equipment are consumable items, so they are straight pipes as they are, or pipes with bent or oblique ends, and they are mainly of extremely simple shapes and structures.

Moreover, when performing spray repairs using these nozzles, the spraying range is limited to the front of the nozzle and its angle, and if there is a damaged area in front of it, the direction of the nozzle must be changed, so the work position must be changed each time. This was not only extremely inconvenient, but also reduced work efficiency.

In addition, as another method, spraying repairs may be performed using a horizontal rotating nozzle, but in this case, spraying is performed on areas other than the intended areas, resulting in loss of spraying material and being uneconomical. Ta.

Therefore, a universal joint is used to connect the refractory material spraying inlet pipe and the nozzle section so that work can be carried out freely according to the usage conditions at the spraying point from the nozzle, and the universal joint is cooled to withstand hot work. A nozzle was developed that
3-39844).

However, since the nozzle rotation mechanism and the cooling mechanism in the same nozzle are constructed as completely separate entities, the universal joint has a very complicated structure, resulting in high manufacturing costs and complicated repairs.

The present invention solves these problems, and by adding a universal joint cooling mechanism to the nozzle rotation mechanism in the universal joint, the universal joint structure can be made extremely compact, reducing manufacturing costs and making repairs easier. It is an object of the present invention to provide a nozzle rotation structure that can be used in various ways.

The present invention provides a nozzle rotation structure in which an inlet pipe for spraying refractory material and a nozzle are connected by a universal joint having an axis that is substantially perpendicular to the axes of both. an outer tube communicating with the tube, an inner tube whose one end communicates with the nozzle and whose other end rotatably fits into the other end of the outer tube, and c) an inner tube formed on the fitting circumferential surface of the outer tube and inner tube. an annular cooling medium inflow space;
2) A flow path regulating plate protruding from the inner circumferential surface of the outer tube in the same inflow space. This invention relates to a nozzle rotation structure in a refractory material spraying device characterized by a pair of cooling medium inlets and outlets provided in an outer tube at the same positions.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a feed pipe for spraying refractory material for repair, and it is usually operated by a worker holding it in his hand, or mounted on a trolley and operated by remote control.

The distal end of the feed pipe 1 is bent at a substantially right angle to form a bent portion 2, and a mounting flange 4 is integrally provided at the distal end of the bent portion for connecting a universal joint 3.

The configuration of the universal joint 3 is that, as is normally done, an inner tube 7 and an outer tube 8, each having a mounting flange 6.5 at the proximal end, are fitted coaxially and sealed with a seal ring 9 as appropriate so that it can rotate freely. This is what is done.

In order to connect the nozzle 10 to the universal joint 3, the mounting flange 11 provided at the base end of the universal joint 3 and the mounting flange 6 of the universal joint 3 are removably communicated with each other by bolts, nuts, etc.

As shown in FIG. 3, several types of nozzles 10 are available, each having a tip bent at an arbitrary angle, and can be replaced as needed.

The universal joint 3 is surrounded by a cooling medium A such as water in order to prevent deformation in a high-temperature atmosphere and maintain the function of the universal joint 3.

In addition, the universal joint 3 has a rotating blade 13 protruding from the outer circumferential surface of the inner tube 7 and a flow path regulating plate 14 protruding from the inner circumferential surface of the outer tube 8. By flowing a cooling medium into either of the compartments C and D formed in the universal joint 3 by the plate 14, the rotary blade 13 and the inner tube 7 and nozzle 10 that are integral therewith are connected to the outer tube 8. rotates as one,
This provides a configuration in which the cooling action and rotation angle adjustment action for the universal joint 3 can be performed simultaneously.

Various known mechanisms can be considered as a mechanism for causing a cooling medium such as water to flow into and out of the universal joint 3, but in the illustrated embodiment, a pair of water inlets 15 provided in the outer tube 8 are used.
．． 16 is connected to a water pressure source 18 via a directional control valve 17.

With this configuration, when the directional control valve 17 is operated to switch the water supply path, the nozzle 10 rotates in the switched direction, and the cooling water in the universal joint 3 is moved and replaced with new cooling water. , the universal joint 3 can be constantly cooled with cooling water having a sufficient cooling capacity, and the nozzle 10 can be prevented from clogging due to adhesion and accumulation of the sprayed material at the bent part 2, and the nozzle according to the present invention Regarding the spraying work using the rotating structure, after the nozzle 10 is communicated and connected to the refractory material spraying inlet pipe 1 by intervening the universal joint 3, it is inserted through the working opening of the furnace, and the damaged parts of the furnace wall are sprayed. This is for carrying out repairs, etc.

Even if the damaged part exists not only in the front in the direction of insertion of the nozzle 10 but also in the front (near the working day),
By operating the direction control valve 17, the cooling medium flows into one of the compartments CD, rotates the rotating blade 13, rotates the inner pipe 7 and the nozzle 10 that are integral with it, and changes the direction of the nozzle 10. It can be rotated to the opposite side about the axis of the universal joint 3 to face the damaged area.

At this time, the rotation of the rotary blade 13 can move and exchange the cooling water in the universal joint 3, and the universal joint 3 can also be effectively cooled.

As described above, the nozzle rotation structure according to the present invention can freely adjust the rotation angle of the nozzle only by the inflow of cooling medium, and can also cool the universal joint with the rotation of the nozzle. It is possible to improve work efficiency, prevent the sprayed refractory from accumulating or adhering within the nozzle, and furthermore prevent thermal damage to the universal joint.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of a refractory spraying device with a trolley according to the present invention having a rotating nozzle structure, FIG. 2 is an enlarged cross-sectional front view of the same nozzle, and FIG. 3 shows two ports. C is an explanatory diagram of a modified example of the nozzle, FIG. 4 is a cross-sectional view taken along the line II in FIG. 1, and FIG. 5 is an explanatory diagram of the operating state of the universal joint.

Claims (1)

[Claims] 1. In a nozzle rotation structure in which a refractory material spraying feed pipe and a nozzle are connected by a universal joint having an axis that is approximately perpendicular to the axes of both, the same universal joint is connected to a) one end of which is connected to the spraying feed pipe A communicating outer tube, an inner tube whose one end communicates with the nozzle and whose other end rotatably fits into the other end of the outer tube, and c) an annular shape formed on the fitting circumferential surface of the outer tube and inner tube. Coolant inflow space, 2)
A) A flow path regulating plate protruding from the inner circumferential surface of the outer tube in the same inflow space; A nozzle rotation structure in a fireproof spraying device characterized by comprising a pair of cooling medium inlets and outlets provided in an outer tube.