KR101235938B1 - Apparatus for cleaning of nozzle in cooling bed and the cleaning method using thereof - Google Patents

Abstract

Disclosed are a cooling bed nozzle cleaning apparatus and a method for spraying dry ice particles and high pressure air to effectively remove foreign substances adsorbed inside a nozzle.
The cooling bed nozzle cleaning apparatus according to the present invention includes a moving carriage moving along one side of the nozzle of the cooling bed, and a branch pipe and a branch pipe connected to supply dry ice particles and high pressure air received from the moving carriage to the nozzle position of the cooling bed. It consists of a configuration comprising a spray nozzle provided to vertically spray the dry ice particles or high-pressure air supplied through the nozzle in the cooling phase.

Description

Cooling bed nozzle cleaning device and its cleaning method {APPARATUS FOR CLEANING OF NOZZLE IN COOLING BED AND THE CLEANING METHOD USING THEREOF}

The present invention relates to an apparatus for cleaning a cold bed nozzle and a method for cleaning the same, and in particular, by effectively peeling off foreign substances in the nozzle using dry ice and then removing them by using pneumatic pressure, it is possible to smooth the flow of cooling water. It is a technique regarding a cooling bed nozzle cleaning apparatus and its cleaning method.

Thick plate is a steel used as a material for large bridges and ships, building structures, pressure vessels, etc., commonly referred to as a relatively thick hot rolled steel sheet.

In particular, the thick plate TMCP material ensures high strength and high toughness properties as it is accelerated and cooled through a cooling phase after rolling.

Here, TMCP (Thermo Mechanical Control Process), which is called the processing heat treatment or heat processing control method, in rolling production of the thick plate, based on the control rolling, refers to a method of securing the mechanical properties of the thick plate through cooling control.

The coolant injected for cooling the thick plate may contain foreign matter, which may be adsorbed onto the nozzles and hinder the flow of coolant.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling bed nozzle cleaning apparatus and a cleaning method thereof, which can clean foreign substances inside the nozzle without damaging or damaging the nozzle in order to smooth the flow of cooling water.

According to the spirit of the present invention, a moving carriage moving along one side of the nozzle in the cooling phase; Branch pipes are connected to supply the dry ice particles and the high-pressure air received from the moving carriage to the nozzle position of the cooling phase; It provides a cooling bed nozzle cleaning apparatus comprising; and a spray nozzle provided to vertically spray the dry ice particles or high-pressure air supplied through the branch pipe toward the inside of the nozzle of the cooling bed.

At this time, the control unit for selectively controlling the supply of dry ice particles or high-pressure air to be injected into the nozzle of the cooling phase through the injection nozzle;

And a dry ice storage chamber formed in the moving carriage and storing dry ice particles; A high pressure air storage chamber which is partitioned with the dry ice storage chamber and formed in the mobile carriage and stores the high pressure air; And a flow path control valve configured to selectively open and close a flow path from each of the dry ice storage chamber and the high pressure air storage chamber to the branch pipe according to a command of the controller.

In addition, the dry ice storage tank for storing the dry ice particles to be supplied to the dry ice storage chamber; And a dry ice control valve connected between the dry ice storage tank and the dry ice storage chamber to regulate a supply of dry ice particles.

In addition, a high pressure air storage tank for storing the high pressure air to be supplied to the high pressure air storage chamber; And a high pressure air control valve connected between the high pressure air storage tank and the high pressure air storage chamber to control the supply of the high pressure air.

At this time, the moving carriage, the driving wheel is provided so as to be able to travel linearly along the rail installed in the direction perpendicular to the rolling progress direction from one nozzle of the cooling phase; And a traveling motor which is formed to generate the driving force necessary in the wheel part.

And it is preferable that the limit switch is provided on both ends of the rail to prevent the moving carriage from being separated from the cooling phase.

On one side of the injection nozzle, when the injection nozzle is located above the nozzle of the cooling phase, a proximity sensor may be provided to stop the movement of the moving carriage for the injection of dry ice particles or high pressure air.

In addition, according to another aspect of the present invention, (a) moving the moving carriage to the nozzle position so that the dry ice particles or high-pressure gas is vertically injected toward the inside of the nozzle of the cooling phase; (b) spraying dry ice particles onto the nozzle of the cooling phase to exfoliate foreign matter adsorbed inside the nozzle; And (c) spraying a high pressure gas over the nozzles of the cooling bed to remove the exfoliated foreign matters.

According to the present invention, the cooling bed nozzle cleaning apparatus and its cleaning method generate pellets of fine dry ice granules and spray them toward the foreign substances adsorbed to the nozzle, thereby forming a gap due to rapid freezing and shrinking of the foreign substances. And, by using a pneumatic easily peeled off, there is an advantageous effect that only the foreign matter can be removed cleanly without damage or damage to the nozzle.

1 is a view schematically showing a rolling process of a thick plate TMCP material,
2 is a view showing a schematic configuration of a cooling bed nozzle cleaning apparatus according to a first embodiment of the present invention;
3 is a view showing a schematic configuration of a cooling bed nozzle cleaning apparatus according to a second embodiment of the present invention;
Figure 4 is a flow chart illustrating a cooling bed nozzle cleaning method according to an embodiment of the present invention.

Hereinafter, a cooling bed nozzle cleaning apparatus and a cleaning method thereof according to a preferred embodiment of the present invention will be described.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Before describing the cooling bed nozzle cleaning apparatus and cleaning method thereof according to an embodiment of the present invention, a rolling process of the thick plate TMCP material will be briefly described with reference to FIG. 1.

Thick plate TMCP material refers to the steel plate which secured the mechanical properties of steel materials by the method of control rolling which controls temperature at the time of rolling production, and air-cooling or water-cooling at the time of cooling.

Such a thick plate TMCP material can be welded at room temperature without preheating, the yield strength is higher than that of general steel, and the design strength of the building can be improved, and as a high strength, the weight can be reduced compared to general steel.

This thick plate TMCP material is rolled through the finishing mill 10, as shown, and then accelerated cooling by a cooling facility (hereinafter referred to as 'cooling phase') (20). In particular, in the cooling phase 20, the degree of cooling of the thick plate is controlled by spraying the cooling water (W) to the surface of the hot plate (S) of high temperature after rolling.

Thereafter, the cooled thick plate enters the hot calibrator 30 and is calibrated into a shape targeted for production.

However, at the time of the accelerated cooling process, a phenomenon such as adsorption of foreign matter contained in the cooling water to the nozzle side of the cooling bed 20 may occur, and as a result, it may act as a cause of obstructing the cooling water injection flow.

2 is a view showing a schematic configuration of a cooling bed nozzle cleaning apparatus according to a first embodiment of the present invention, Figure 3 is a schematic configuration of a cooling bed nozzle cleaning apparatus according to a second embodiment of the present invention One drawing.

2 and 3 clearly indicate only the main features in order to conceptually clearly understand the present invention, and as a result, various modifications of the drawings are expected, and the scope of the present invention is determined by the specific shapes shown through the drawings. Need not be limited.

First Embodiment

2 is a view schematically showing a cooling bed nozzle cleaning apparatus according to a first embodiment of the present invention.

Referring to FIG. 2, the illustrated cooling bed nozzle cleaning apparatus includes a moving carriage 110 moving along a cooling bed, and a branch pipe extending from the moving carriage toward the nozzle side to supply dry ice particles or high pressure air ( 130, and the injection nozzle 150 formed in the longitudinal direction from the branch pipe lower portion.

First, the mobile carriage 110 will be described.

The moving carriage 110 refers to a bogie means for moving along one side of a cooling nozzle.

The inside of the mobile carriage 110 may be provided with a dry ice storage chamber (111a) for storing the dry ice particles, and a high pressure air storage chamber (11b) for storing the high pressure air.

In addition, an internal flow path for receiving the dry ice particles from the separately provided dry ice storage tank 112a and flowing them into the nozzle N may be formed. Similarly, an internal flow path for receiving high pressure air from the separately provided high pressure air storage tank 112b and flowing it into the nozzle N may be formed.

And these internal flow paths are formed to be partitioned with each other, it is preferable that a flow path control valve (not shown) is provided on the flow path toward the nozzle (N) through the exit side.

The flow path control valve selectively opens and adjusts a flow path from each of the dry ice storage chamber 110a and the high pressure air storage chamber 110b to the branch pipe 130 to be described later, thereby sequentially spraying the dry ice particles and spraying the high pressure air. To be done.

On the other hand, since a plurality of nozzles N aligned in the cooling phase are provided in predetermined rows and columns, it is difficult to clean all of the nozzles N once.

Therefore, by moving the moving carriage 110 along one side of the nozzle on the cooling, it is possible to perform the cleaning for all the nozzle (N) in sequence.

To this end, the driving wheel 121 is provided on the lower surface of the moving carriage 110, the driving motor 123 for generating a driving force required for the driving wheel 121 is provided.

A rail is formed at one side of the nozzle of the cooling phase along a predetermined section, and the rail is preferably formed long in a direction perpendicular to the rolling progress direction at one side of the nozzle of the cooling phase. The driving wheel 121 is guided along the rail to implement linear driving of the moving carriage 110.

The driving motor 123 may be a general electric motor, that is, a DC / AC motor as a specific example, and preferably, a DC / AC servo motor capable of servo control.

The driving motor 123 receives the power introduced from the outside to generate a rotational force, and the generated rotational force is smoothly transmitted to the driving wheel 121 through an axis / gear means (not shown).

And the moving carriage 110 is made of a structure that runs linearly along the rail, but should not be separated to the outside of the rail, that is, the cooling phase, limit switches 125 for intermittent running of the mobile carriage 110 on both ends of the rail. Are respectively provided.

On the other hand, the dry ice storage chamber (110a) and the high-pressure air storage chamber (110b) built in the mobile carriage 110, the dry ice storage tank (112a) and the high-pressure air storage tank (112b) and piping line of a separate configuration Connections may be made via 113a and 113b.

At this time, the dry ice storage chamber 110a and the high pressure air storage chamber 110b serve as a temporary storage space for temporarily storing dry ice particles and high pressure air to be supplied to the nozzle N side. In contrast, the dry ice storage tank 112a and the high pressure air storage tank 112b are devices capable of continuously storing a predetermined amount of dry ice particles and high pressure air which are constantly required.

On the pipe line 113a connected from the dry ice storage tank 112a to the dry ice storage chamber 110a, a dry ice control valve 114a for controlling the supply of dry ice particles is provided.

Similarly, on the pipe line 113b connected from the high pressure air storage tank 112b to the high pressure air storage chamber 110b, a high pressure air control valve 114b for controlling the supply of high pressure air is provided.

As such, when the externally configured dry ice storage tank 112a and the high pressure air storage tank 112b are additionally provided, the service life of the apparatus may be long, and a large cooling bed may be used.

Next, the branch pipe 130 will be described.

The branch pipe 130 is a manifold-shaped tubular member which receives dry ice particles and high pressure air from the moving carriage 110 and supplies dry ice particles or high pressure air to the nozzle N position of the cooling phase. .

The shape and number of the branch pipes 130 need not be limited to the exemplary shape and number shown in FIG. 2, and may be slightly changed for various embodiments without departing from the scope of the present invention.

The branch pipe 130 is formed in communication with the above-described moving carriage 110, it is made of a structure that is also connected to the dry ice storage chamber (110a) and the high-pressure air storage chamber (110b).

Next, the injection nozzle 150 will be described.

The injection nozzle 150 serves to inject the dry ice particles and the high pressure air supplied through the moving carriage 110 and the branch pipe 130 toward the inside of the nozzle N of the cooling phase.

To this end, the injection nozzle 150 is formed in a plurality of arrangement forms spaced apart from each other in the longitudinal direction of the branch pipe 130, the lower side of the branch pipe (130). In addition, each of the injection nozzles 150 preferably has an outlet shape for vertically injecting dry ice particles and high-pressure air toward the nozzle N of the cooling bed 20.

Foreign substances such as rust in the nozzle N have a form that is not easily peeled off after being adsorbed. That is, according to this reason, it may be difficult to remove the foreign matter by simply spraying only the high pressure washing water into the nozzle (N).

The injection nozzle 150 according to the present invention is made of a form capable of high-pressure spraying the dry ice particles in the form of pellets into the nozzle (N), or injecting high-pressure air, it is easy to peel off and remove the foreign matter.

In particular, the dry ice particles injected through the injection nozzle 150 are forcibly collided with the foreign matter. First, foreign matters may be rapidly frozen or shrink cracked due to temperature differences. At this time, the dry ice particles penetrate through the gaps and rapidly evaporate.

Rapidly evaporated dry ice particles expand about 1000 times in volume to exfoliate foreign matter. Next, the high pressure air injected through the injection nozzle 150 effectively removes the foreign substances peeled off as described above.

 On the other hand, one side of the injection nozzle 150, the position detecting means for detecting the position of the nozzle to stop the linear running of the moving carriage 110 is provided. As the preferred position detecting means, the proximity sensor 152 may be used.

Referring to FIG. 2, although the proximity sensor 152 is illustrated as being provided for each injection nozzle 150, this is merely an exemplary form and the present invention is not limited thereto.

The proximity sensor 152 quickly detects that each injection nozzle 150 is positioned above the nozzle N of the cooling phase while the moving carriage 110 moves, and stops the operation of the moving carriage 110. As a result, the injection nozzles 150 may be vertically disposed above the nozzles N of the cooling bed 20.

Second Embodiment

3 is a view showing a schematic configuration of a cooling bed nozzle cleaning apparatus according to a second embodiment of the present invention.

This second embodiment is an embodiment in which active control of the device is implemented by adding a control unit to the configuration of the above-described first embodiment.

Therefore, redundant description of the same configuration as that of the first embodiment described above with reference to FIG. 2 will be omitted.

Referring to FIG. 3, the cooling bed nozzle cleaning apparatus includes a moving carriage 110 moving along the cooling bed, and a branch pipe 130 extending from the moving carriage toward the nozzle to supply dry ice particles or high pressure air. And, the injection nozzle 150 formed in the longitudinal direction from the branch pipe lower, and consists of a configuration further comprising a control unit 180 there.

In this case, the controller 180 selectively controls the supply flow of the dry ice particles or the high-pressure air injected into the nozzle N of the cooling bed through the injection nozzle 150, and selectively controls the supply amount.

In particular, the controller 180 controls the opening and closing of the dry ice control valve 114a provided on the pipe line 113a connected from the dry ice storage tank 112a to the dry ice storage chamber 110a.

In addition, the controller 180 controls the opening and closing of the high pressure air control valve 114b provided on the pipe line 113b connected from the high pressure air storage tank 112b to the high pressure air storage chamber 110b.

In addition, the controller 180 adjusts the driving range of the moving carriage 110 in conjunction with the limit switch 125 and receives a signal from the proximity sensor 152 provided on the injection nozzle 150 to move the carriage. The driving motor 123 is controlled to stop the 110.

According to various control operations of the controller 180, the cooling bed nozzle cleaning apparatus according to the present invention may have a form that can be actively controlled by itself without requiring a separate management manpower.

On the other hand, although not shown separately, the control unit 180, the flow control valve (not shown) provided on the passage exit side connected to the branch pipe 130 from the dry ice storage chamber (111a) and the high-pressure air storage chamber (111b) Can be controlled.

Thus, by utilizing the same branch pipe 130 and the injection nozzle 150, it is possible to sequentially spray two injection media, that is, dry ice particles and high pressure air, it is possible to control the injection operation.

Next, a cooling bed nozzle cleaning method according to a preferred embodiment of the present invention will be described with reference to FIG. 5.

First, the moving carriage is moved to the nozzle position so that dry ice particles or high pressure gas is vertically injected toward the inside of the nozzle of the cooling phase (ST100).

Next, the dry ice particles are sprayed onto the nozzle of the cooling phase to release foreign substances adsorbed inside the nozzle (ST200).

In this step ST200, the dry ice particles sprayed toward the foreign matter are forcedly collided with the foreign matter. The foreign matter forcedly collided with the dry ice particles shrinks and cracks by the rapid freezing and the temperature difference to form a gap between the adsorbed nozzles. Furthermore, through these gaps, dry ice particles penetrate and rapidly evaporate.

Here, the rapidly evaporated dry ice particles are expanded about 1000 times compared to the case where the volume of the dry ice particles is solid, thereby easily peeling off foreign matters.

Next, the high pressure gas is injected onto the nozzle of the cooling bed to remove foreign substances peeled off in the previous step (ST300). The foreign substance peeled off in the previous step ST200 is removed due to the injection of high pressure gas.

As described above, according to the present invention, the cooling bed nozzle cleaning apparatus and the cleaning method thereof have a method of generating fine dry ice pellets in pellet form and spraying them toward foreign substances adsorbed to the nozzle.

In particular, dry ice grains injected toward the foreign matter adsorbed by the nozzle rapidly freeze and shrink the foreign matter to form a gap. And as the dry ice grains rapidly evaporate between the gaps, foreign matters are easily peeled off.

Peeled foreign matter is removed by pneumatic injection, the nozzle cleaning can be completed without any damage or damage to the nozzle.

Due to the nozzle cleaning action of the present invention, it is possible to smoothly induce the flow of cooling water poured from the cooling bed, and as a result, the effect of improving the quality of the thick plate, especially the thick plate TMCP material, is obtained.

In the above, the preferable embodiment regarding the cooling bed nozzle cleaning apparatus which concerns on this invention, and its cleaning method was demonstrated.

It is to be understood that the above-described embodiments are illustrative in all aspects and should not be construed as limiting, the scope of the invention being indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

N: nozzle
110: moving carriage
130: branch pipe
150: spray nozzle
180:

Claims (9)

A moving carriage moving along the nozzle side of the cooling phase;
Branch pipes are connected to supply the dry ice particles and the high-pressure air received from the moving carriage to the nozzle position of the cooling phase;
A spray nozzle provided to vertically spray the dry ice particles or the high pressure air supplied through the branch pipe toward the inside of the nozzle of the cooling phase; And
And a position detecting means installed at one side of the spray nozzle and detecting a position of the nozzle of the cooling phase to stop linear movement of the moving carriage for spraying dry ice particles or high pressure air.
The method of claim 1,
And a control unit for selectively controlling the supply of dry ice particles or high pressure air to be injected into the nozzle of the cooling bed through the injection nozzle.
The method of claim 2,
A dry ice storage chamber embedded in the moving carriage and storing dry ice particles;
A high pressure air storage chamber which is partitioned with the dry ice storage chamber and formed in the mobile carriage and stores the high pressure air; And
And a flow path control valve for selectively opening and closing a flow path from each of the dry ice storage chamber and the high pressure air storage chamber to the branch pipe according to a command of the controller.
The method of claim 3, wherein
A dry ice storage tank storing dry ice particles to be supplied to the dry ice storage chamber; And
And a dry ice control valve formed between the dry ice storage tank and the dry ice storage chamber to regulate a supply of dry ice particles.
The method of claim 3, wherein
A high pressure air storage tank for storing high pressure air to be supplied to the high pressure air storage chamber; And
And a high pressure air control valve formed between the high pressure air storage tank and the high pressure air storage chamber to control the supply of the high pressure air.
The method of claim 1,
The moving carriage,
A driving wheel provided to be able to travel linearly along a rail installed in a direction perpendicular to the rolling progress direction at one side of the nozzle in the cooling phase; And
Cooling nozzle cleaning apparatus comprising a; a driving motor is formed to generate the required driving force in the driving wheel.
The method according to claim 6,
Cooling nozzle cleaning device, characterized in that the limit switch is provided on both ends of the rail to prevent the moving carriage from being separated from the cooling bed.
The method of claim 1,
And said position detecting means is a proximity sensor.
(a) detecting the position of the cooling phase and stopping the linear running of the moving carriage such that dry ice particles or high pressure gas is vertically injected into the nozzle of the cooling phase;
(b) spraying dry ice particles onto the nozzle of the cooling phase to exfoliate foreign matter adsorbed inside the nozzle; And
(c) spraying a high pressure gas over the nozzle of the cooling bed to remove the exfoliated foreign matter.

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