KR102497249B1 - Detachable siphon pipe connection bushing for cooling system of hot-rolling rollers in steelmaking facilities - Google Patents

Abstract

The present technology relates to a separable siphon pipe connection bushing for a hot-rolling roller cooling device in a steelmaking facility, which connects separable siphon pipes, which are composed of two bodies mounted on a roller shaft, to each other to prevent leakage and facilitate maintenance. More specifically, the separable siphon pipe connection bushing for a hot-rolling roller cooling device in a steelmaking facility includes: a connection pipe composed of two bodies that are separable from each other, wherein an upper body is connected to a first siphon pipe, and a lower body is connected to a second siphon pipe; a gap maintenance means fastened to the connection pipe or provided on the outer surface of the second siphon pipe to face the inner surface of the roller shaft and maintain the verticality of the first siphon pipe and the second siphon pipe; and a clamp composed of a first body and a second body and fixing the connection pipe composed of the two bodies. The gap maintenance means includes: a first spacer screwed to the connection pipe; one or more second spacers installed in the longitudinal direction of the second siphon pipe to be located below the first spacer; and a support plate protruding radially from at least one of the inner and outer sides of the first spacer as well as the second spacer.

Description

Detachable siphon pipe connection bushing for cooling system of hot-rolling rollers in steelmaking facilities}

The present technology relates to a detachable siphon pipe connecting bushing for a hot-roller cooling system in steelmaking facilities, which connects a detachable siphon pipe composed of two bodies mounted on a roller shaft to prevent leakage and provide convenience in maintenance.

In general, during continuous casting using steelmaking facilities, molten iron is slid and moved by rollers that supply water for cooling by using the drop method with high production volume. At this time, the roller rotates to supply cooling water The rotary joint constituting is installed at the end of the roller (roller shaft).

As shown in FIG. 1, the conventional cooling device 1 of a hot-rolling roller for steelmaking facilities is connected to one end of a roller shaft 11 and supplies cooling water using a rotary joint 12 and a siphon pipe 13. and it was to be released.

In the cooling device (1), one end of the siphon pipe (13) is inserted into the cooling water inlet of the rotary joint (12) and the other end is inserted into the inner diameter of the roller shaft (11). 13) Since it is impossible to produce accurate straightness and concentricity of the siphon pipe 13 at this time, water leaks due to run out at the position where the siphon pipe 13 is connected to the rotary joint 12 Since water pressure is generated inside the rotary joint 12, water leaks from the contact surfaces S of the mechanical chambers 14 and 15, and the bearing 12a of the rotary joint 12 is damaged early. There is a problem.

In order to solve this problem, as shown in FIG. 2, a cooling device 2 using a separable siphon pipe has been proposed in the prior art, and the first siphon pipe 27a installed in the rotary joint 23 is installed in a state where one end is inserted into the bushing 21 installed inside the roller shaft 22, and communicates with the second siphon pipe 27b installed inside the roller shaft 22 through the bushing 21 installed as possible.

Therefore, the cooling water flowing into one side of the rotary joint 23 is introduced into the inner diameter of the roller shaft 22 through the inner diameters of the first siphon pipe 27a and the second siphon pipe 27b, and the roller shaft 22 and flows through the outer circumferential surface of the second siphon pipe (27b) to cool the roller shaft (22), and then the first siphon pipe (27a) on the rotary joint (23) side of the rotary joint (23) side ) and the inner circumferential surface of the rotor 23a and discharged to the cooling water outlet 24 of the rotary joint 23 to achieve cooling.

However, although there is a slight difference in the cooling device having such a separate siphon pipe, leakage occurs at the bushing 21 by about 40% over time, so that the cooling water cannot be supplied to the end of the roller shaft 22. .

As a result, due to the lack of cooling water at the end of the roller shaft, high-pressure steam of 7-8 kg at a temperature of about 150 degrees is generated inside the roller shaft, and is momentarily discharged to the cooling water outlet 24 on the side of the rotary joint 23, and at this time, thermal shock There is a problem that cracks occur on the contact surfaces (Q) of the mechanical seals (25, 26) having high hardness and the rotary joint (23) is damaged, and the bushing (21) is very difficult to replace even after being worn. There is a problem that makes it difficult.

Domestic Patent Registration No. 10-0602942 (Announcement date: 2006.07.20.)

In order to solve the above-mentioned conventional problems, the present invention is a connection that can prevent the risk of leakage by supplementing a bushing connecting separable siphon pipes so that they can communicate with each other, and further ensure the ease of replacement of the bushing. The purpose is to provide a bushing.

In order to solve the above-described technical problem, the detachable siphon pipe connection bushing for the cooling device for the hot-rolled roller of the steelmaking facility according to the present invention is composed of two bodies that are detachable from each other, but the upper body 110 is connected to the first siphon pipe 27a. And, the lower body 120 is coupled to the connection pipe 100 connected to the second siphon pipe 27b, and is fastened with the connection pipe 100 or provided on the outer surface of the second siphon pipe 27b to form a roller shaft ( 22) The distance maintenance means 200 for maintaining the verticality of the first siphon pipe 27a and the second siphon pipe 27b by interviewing the inner surface, and the first body 310 and the second body 320 It includes a clamp 300 fixing the connecting pipe 100 composed of two bodies, but the space maintaining means 200 includes a first spacer 210 screwed to the connecting pipe 100, One or more second spacers 220 installed in the longitudinal direction of the second siphon pipe 27b to be located below the first spacer 210, the first spacer 210, as well as the inside of the second spacer 220 Or, it is characterized in that it includes a support plate 250 protruding radially from at least one side of the outer side.

In addition, the upper body 110 communicates with the second siphon pipe 27b therein so that the cooling water supplied to the first siphon pipe 27a can be supplied to the second siphon pipe 27b. A first hollow part 111, a first groove part 113 adjacent to the first hollow part 111 but connected to the first siphon pipe 27a, and formed on the outer surface of the upper body 110 and the clamp It is preferable to include a first insertion groove 115 into which 300 is inserted.

In addition, the lower body 120 communicates with the first siphon pipe 27a therein so that the cooling water supplied from the first siphon pipe 27a can be supplied to the second siphon pipe 27b. The second hollow part 121 and the second groove part 123 adjacent to the second hollow part 121 but connected to the second siphon pipe 27b are formed on the outer surface of the lower body 120, and the It is preferable to include a second insertion groove 125 into which the clamp 300 is inserted and a screw thread G formed on the lower outer surface of the lower body 120 and screwed to the first spacer 210.

In addition, the first spacer 210 and the second spacer 220 are formed in a ring shape to pass through the outside of the second siphon pipe 27b, respectively, and are arranged as a pair adjacent to each other at a predetermined distance in the vertical direction. It includes a fitting body 230 and one or more connecting bars 240 provided so that a pair of adjacent fitting bodies 230 can be connected to each other, but the support plate on the outer and inner surfaces of the fitting body 230 ( 250) is formed, but it is preferable that the support plate 250 is omitted on the inner surface of the fitting body 230 coupled to the connection pipe 100, and a thread G is formed.

In addition, the first body 310 and the second body 320 each have an arc shape in which a coupling groove 330 is inserted into the inside so that the outer surface of the connector 100 can be interviewed in a shape-fitting manner. After being molded into and fitted to surround the outer surface of the connecting pipe 100, it is fixed by a fastening means, and the upper and lower ends are preferably inserted into and fixed to the inside of the connecting pipe 100.

In addition, the inner wall of the coupling groove 330 further includes an absorbent 340 that absorbs the cooling water leaking from the joint C and at the same time seals the joint C prior to leakage, but the absorbent 340 It is preferable to be connected to the water leakage sensor 350 provided in the first body 310 or the second body 320 so that the controller 400 can detect whether or not water leakage occurs in the connection pipe 100. .

According to the present invention, unlike the prior art, while maintaining the verticality of the siphon pipe within the space of the roller shaft, the risk of leakage is prevented by a clamp fixed to surround the connecting pipe and the connecting pipe, and furthermore Even if water leakage occurs at the joint, the control unit detects whether water leakage occurs quickly through the absorber and the water leakage sensor, and the effect of performing maintenance is expected.

In addition, unlike the prior art, after the siphon pipe 27 is pulled out of the roller shaft, it is possible to separate the first siphon pipe and the second siphon pipe only by dismantling the clamp composed of two bodies, so maintenance Convenience also has the expected effect.

1 is a view showing a roller shaft equipped with a conventional non-separable siphon pipe.
2 is a view showing a state in which a conventional separable siphon pipe is coupled by a bushing and installed on a roller shaft.
Figure 3 is a perspective view showing a separate siphon pipe connection bushing for a cooling device for a hot-rolled roller in steelmaking facilities according to the present invention.
Figure 4 is an exploded perspective view of Figure 3;
Figure 5 is a cross-sectional view showing a detachable siphon pipe connected to each other by a detachable siphon pipe connection bushing for a cooling device for a hot-rolled roller in steelmaking facilities according to the present invention.
6 is an enlarged view of part 'A' of FIG. 5;
7 is an enlarged view of part 'B' of FIG. 5;
8 is a state diagram of use with a roller shaft to which a separate siphon pipe connection bushing for a cooling device for a hot-rolled roller for steelmaking facilities according to the present invention is applied.

Hereinafter, various embodiments will be described in more detail with reference to the accompanying drawings. The embodiments described in this specification may be modified in various ways. Certain embodiments may be depicted in the drawings and described in detail in the detailed description. However, specific embodiments disclosed in the accompanying drawings are only intended to facilitate understanding of various embodiments. Therefore, the technical idea is not limited by the specific embodiments disclosed in the accompanying drawings, and it should be understood to include all equivalents or substitutes included in the spirit and technical scope of the invention.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but these components are not limited by the above terms. The terminology described above is only used for the purpose of distinguishing one component from another.

In this specification, terms such as "comprise" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded. It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

In addition, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be abbreviated or omitted.

Hereinafter, with reference to the accompanying drawings, a separate siphon pipe connection bushing (hereinafter, simply referred to as a 'connection bushing') for a cooling device for a hot-rolled roller in steelmaking facilities according to the present invention will be described in detail.

Prior to the description, in the connection bushing 1 according to the present invention, as mentioned in the prior art, the first and second siphon pipes 27a and 27b having a separate form are included in the roller shaft 22 (see FIG. 2). In the connection bushing (1) installed in the cooling device of a hot-rolled roller in a typical steelmaking facility for cooling the corresponding roller shaft through cooling water discharge and fastened to prevent cooling water from flowing out between the first and second siphon pipes. In order not to obscure the subject matter of the present invention, the description of the operation and structure of the hot rolling roller cooling device will be omitted below.

First, as shown in FIGS. 3 to 5, the connecting bushing 1 according to the present invention largely includes a connecting pipe 100, a gap maintaining means 200 and a clamp 300.

In more detail, the connection pipe 100 is configured so that the first and second siphon pipes 27b formed in a separate form are vertically interconnected and inserted into the roller shaft, so that the upper body ( 110) and a lower body 120.

For example, as shown in the upper body 110, a first hollow part 111 with open top and bottom is formed in the longitudinal direction, and the inside of the upper body 110 is close to the first hollow part 111. As a result, a belt-shaped first groove 113 for inserting and fixing the lower end of the first siphon pipe 27a is formed.

The first siphon pipe 27a inserted into the first groove 113 can be coupled to the inside of the first groove 113 in the form of an interference fit. A tightening clamp (not shown) is provided to press the outer surface of the upper body 110 inward so that the first siphon pipe 27a inserted into the first groove 113 can be fixed by pressing. do.

At this time, a first insertion groove 115 is provided on the outer surface of the upper body 110 so that the upper end of the clamp 300 to be described later is inserted to improve the fixing force between the upper body 110 and the clamp 300. It is desirable to form

In addition, as shown in the figure, the lower body 120 has a second hollow part 121 with an open top and bottom formed in the longitudinal direction, and the lower body 120 close to the second hollow part 121. A second groove 123 in the form of a belt for inserting and fixing the upper end of the second siphon pipe 27b is formed inwardly.

The second siphon pipe 27b inserted into the second groove 123 can be coupled to the inside of the second groove 123 in the form of an interference fit, and if necessary, a separate pipe is installed outside the lower body 120. A tightening clamp (not shown) is provided to press the outer surface of the lower body 120 inward so that the second siphon pipe 27b inserted into the second groove 123 can be fixed by pressing. do.

At this time, the lower end of the clamp 300 to be described later is inserted into the outer surface of the lower body 120 so that the fixing force between the lower body 120 and the clamp 300 can be improved. It is desirable to form

In this way, the connection pipe 100 composed of two bodies including the upper body 110 and the lower body 120 is combined so that the outer surface can be pressed by the clamp 300 to be described later, preventing separation and at the same time The first and second siphon pipes 27b inserted into the first hollow part 111 and the second hollow part 121 communicate with each other so that the cooling water supplied to the first siphon pipe 27a is formed in a plurality of hollow holes. After discharging the cooling water to the roller shaft by moving into the second siphon pipe 27b through the second siphon pipe 27b, the discharge port 24 of the rotary joint 23 (see FIG. 2) along the inner wall of the space S of the roller shaft 2) to be discharged (see FIG. 8).

In addition, the gap maintaining means 200 is a first spacer configured to maintain the verticality of the separable siphon pipes 27: 27a and 27b inserted into the space portion S formed inside the roller shaft 22. (210) and a second spacer (220).

For example, the first spacer 210 is inserted through the outside of the second siphon pipe 27b so as to be screwed with the screw thread G formed on the lower outer surface of the lower body 120 described above.

To this end, the first spacer 210 has a pair of fittings 230 adjacent to each other in the longitudinal direction of the second siphon pipe 27b so as to have a tubular shape with an open top and bottom, in a ring shape. It is molded and inserted through, and a pair of the fitting body 230 is connected to each other through the upper and lower portions of the connecting bars 240 provided in a plurality of radially to form one body.

At this time, it is preferable that a screw thread (G) for screwing with the screw thread (G) formed on the lower body 120 is formed on the inner surface of the fitting body 230 located above the first spacer 210.

Here, the reason for using a plurality of connecting bars 240 in a pair of fitting bodies 230 so that they can be integrated with each other is that the first and second siphon pipes ( This is to minimize interference with the flow of cooling water moving within the space S when maintaining the verticality of 27b).

In addition, the inner wall of the roller shaft 22 forming the space S on the outer and inner surfaces of the pair of fitting bodies 230 constituting the first spacer 210, as well as the outer surface of the second siphon pipe 27b A plurality of support plates 250 for being supported and maximizing the verticality effect may be formed to protrude radially, and the support plate 250 formed on the first spacer 210 is, as shown, the lower body ( 120) and the inner wall of the upper side fitting body 230 screwed together so that it can be omitted, and this shape difference is used for distinguishing the second spacer 220.

In addition, the second spacer 220 is molded so that a pair of fitting bodies 230 made of a ring shape can be integrated through a plurality of connecting bars 240 in the same way as the first spacer 210 described above. It satisfies the structure of being inserted through the outside of the siphon pipe 27b, and the support plate 250 is protrudingly formed on both the outer and inner walls of the pair of fittings 230, different from the above-described first spacer 210. It has a structure supported by both the inner wall of the space portion (S) and the outer surface of the second siphon pipe (27b).

On the other hand, the protruding ends of the support plate 250 formed on the first spacer 210 and the second spacer 220 are molded of a flexible material that is free to bend and unfold, so that the inner wall of the space S and the second siphon pipe (27b) It can be easily supported on the outer surface, and if necessary, it is also formed on the outer surface of the connecting bar 240 so that the verticality of the entire siphon pipe 27 can be improved.

In addition, the clamp 300 fixes the above-described upper body 110 and lower body 120 composed of two parts so that they do not separate from each other, but the joint portion (C) of the upper body 110 and the lower body 120 ), when a leak of cooling water occurs, it is quickly detected so that maintenance of the connection bushing 1 according to the present invention can be smoothly performed, and the first body 310, the second body 320 and It includes a water leak sensor 350.

Prior to description, the first body 310 and the second body 320 are fastened to have the same shape as each other so as to surround the outside of the connector 100 in a donut shape by fastening means such as bolts or screws. Note that the description of the second body (0) is borrowed from the description of the first body 310 so as not to obscure the gist of the present invention with the configuration.

For example, as shown, the first body 310 is molded to have a semicircular shape symmetrically with the second body 320 having the same shape.

The inner side of the first body 310 is formed with a coupling groove 330 for inserting the outer surface of the connector 100 in a shape-fitting state in which the upper body 110 and the lower body 120 are coupled to each other.

At this time, as shown, the inner wall of the coupling groove 330 performs the function of a gasket capable of maintaining airtightness inside the connection pipe 100 composed of two bodies, and at the same time, when leakage of coolant occurs at the joint (C), etc., leakage occurs. It is preferable that an absorber 340 for quickly absorbing the is further provided (see FIG. 6).

Of course, the absorber 340 can also be additionally applied and used to the joint portion C of the connecting pipe 100 as needed (see FIG. 7 ).

In addition, the absorber 340 is provided in the lower part of the first body 310 or the second body 320 and is installed connected to the water leakage sensor 350 electrically connected to the control unit 400, and absorbed through the absorber 340. The moisture of the cooling water is measured by the water leakage sensor 350 so that the controller 400 can check whether water leakage has occurred.

To this end, the absorbent 340 provided on the inner wall of the coupling groove 330 penetrates the first body 310 or the second body 320 in which the leak sensor 350 exists, as shown, and the leak sensor ( 350) to have a structure that can be connected.

As described above, the connecting bushing 1 according to the present invention maintains the verticality of the siphon pipe 27 within the space S of the roller shaft 22, and at the same time, the connecting pipe 100 is differentiated from the prior art. ) and the clamp 300 fixed to surround the connection pipe 100 to prevent the risk of leakage, and furthermore, even if leakage occurs at the joint (C), the absorber 340 and the leak sensor 350 Through this, the control unit 400 quickly detects whether or not water leakage occurs, and an effect of performing maintenance is expected.

In addition, after the siphon pipe 27 is drawn out of the roller shaft 22 differently from the prior art, the first siphon pipe 27a and the second siphon pipe 27a and the second siphon pipe can be removed only by dismantling the clamp 300 composed of two bodies. (27b), it is possible to separate, so that the convenience of maintenance can also be expected.

As described above, the present invention has been described by specific details such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , Those skilled in the art in the field to which the present invention belongs can make various modifications and variations from these descriptions.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and it will be said that not only the claims to be described later, but also all modifications equivalent or equivalent to these claims belong to the scope of the present invention. .

1: Detachable siphon pipe connection bushing for cooling device for hot-rolled rollers in steelmaking facilities according to the present invention
100: connector
110: upper body 111: first hollow part
113: first groove 115: first insertion groove
120: lower body 121: second hollow part
123: second groove 125: second insertion groove
200: interval maintaining means
210: first spacer 220: second spacer
230: fitting body 240: connecting bar
250: support plate
300: clamp
310: first body 320: second body
330: coupling groove 340: absorbent
350: water leak sensor
400: control unit

Claims (6)

Consisting of two separate bodies, the upper body 110 is connected to the first siphon pipe 27a, and the lower body 120 connects to the second siphon pipe 27b.
The verticality of the first siphon pipe 27a and the second siphon pipe 27b by being fastened to the connection pipe 100 or provided on the outer surface of the second siphon pipe 27b and interviewing the inner surface of the roller shaft 22 Interval maintenance means 200 for maintaining; and
A clamp 300 configured of a first body 310 and a second body 320 and fixing the connecting pipe 100 composed of two bodies;
At least one spacer 200 is installed in the longitudinal direction of the second siphon pipe 27b so as to be positioned below the first spacer 210 screwed to the connection pipe 100 and the lower portion of the first spacer 210. The second spacer 220, the first spacer 210, as well as a support plate 250 protruding radially from at least one side of the inner or outer side of the second spacer 220, Detachable siphon pipe connection bushing for hot-rolling roller cooling system of steel making facility.
According to claim 1,
The upper body 110 is
a first hollow part 111 formed inside to communicate with the second siphon pipe 27b so that the cooling water supplied to the first siphon pipe 27a can be supplied to the second siphon pipe 27b;
a first groove portion 113 adjacent to the first hollow portion 111 and to which the first siphon pipe 27a is connected; and
A first insertion groove 115 formed on the outer surface of the upper body 110 and into which the clamp 300 is inserted; a separating type siphon pipe connection bushing for a cooling device for a hot-rolled roller in steelmaking facilities, characterized in that it comprises.
According to claim 1,
The lower body 120 is
a second hollow part 121 formed inside to communicate with the first siphon pipe 27a so that the cooling water supplied from the first siphon pipe 27a can be supplied to the second siphon pipe 27b;
a second groove portion 123 adjacent to the second hollow portion 121 and to which the second siphon pipe 27b is connected;
A second insertion groove 125 formed on an outer surface of the lower body 120 and into which the clamp 300 is inserted; and
A thread (G) formed on the lower outer surface of the lower body 120 and screwed with the first spacer 210; Separate type siphon pipe connection bushing for steel facility hot-rolled roller cooling device, characterized in that it comprises.
According to claim 1,
The first spacer 210 and the second spacer 220 are respectively
Fitting bodies 230 formed in a ring shape to pass through the outside of the second siphon pipe 27b and arranged in pairs at a predetermined distance in the vertical direction; and
Including; connecting bars 240 provided with one or more so that a pair of neighboring fittings 230 can be connected to each other,
The support plate 250 is formed on the outer and inner surfaces of the fitting body 230, but the support plate 250 is omitted on the inner surface of the fitting body 230 coupled to the connection pipe 100, and the screw thread (G) Detachable siphon pipe connection bushing for steel facility hot-rolled roller cooling device, characterized in that formed.
According to claim 1,
The first body 310 and the second body 320 are respectively
After being molded into an arc shape in which a coupling groove 330 is inserted to be inserted so that the outer surface of the connector 100 can be interviewed in a shape-fitting manner on the inside and wrapped around the outer surface of the connector 100, the fastening means It is fixed by, and the upper and lower ends are a separate siphon pipe connection bushing for the steel facility hot-roller cooling device, characterized in that the structure is inserted and fixed into the connecting pipe (100).
According to claim 5,
In the inner wall or joint (C) of the coupling groove 330
An absorbent 340 that absorbs the cooling water leaking from the joint (C) and at the same time seals the joint (C) before leakage; further comprising,
The absorber 340 is connected to the water leakage sensor 350 provided in the first body 310 or the second body 320 so that the controller 400 can detect whether or not water leakage occurs in the connection pipe 100. Detachable siphon pipe connection bushing for steel facility hot-rolled roller cooling device, characterized in that to enable.

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