KR100959071B1 - Slide gate - Google Patents

Abstract

The present invention is a slide gate for adjusting the flow rate of the molten steel, more specifically, the slide is to adjust the molten steel flow rate in such a way to change the open area of the molten steel flow path while moving the pair of the upper and lower valve plate facing each other It's about the gate.

The present invention is the upper housing 110, the upper valve plate 101 is mounted on the inside;

A lower housing 120 mounted inside the lower valve plate, the lower housing 120 positioned below the upper housing;

A pair of elastic hinge members 130 installed vertically through the left and right sides of the upper housing or the lower housing to connect the lower housing or the upper housing to be opened and closed while elastically lifting and lowering the lower housing or the upper housing;

A slider 140 positioned inside the lower housing and slidingly moved in the front-rear direction by receiving a moving force from the driving cylinder C while supporting the lower valve plate 102;

A guide track 150 installed on the bottom of the slider 140 along the moving direction of the slider 140 and having a groove 151 formed at one side thereof; And

It is configured to include a pair of rollers 160 respectively installed on the left and right sides of the lower housing so as to be in contact with the guide track.

Slide Gate, Valve Plate, Compression Spring, Stopper

Description

Slide gate

The present invention is a slide gate for adjusting the flow rate of the molten steel, more specifically, the slide is to adjust the molten steel flow rate in such a way to change the open area of the molten steel flow path while moving the pair of the upper and lower valve plate facing each other It's about the gate.

In general, the continuous casting process for manufacturing the slab is a process of transferring the molten steel refined in the ladle (Tundish). At this time, in order to adjust the flow rate of the molten steel between the ladle and the tundish, a slide gate is typically mounted on the outer bottom surface of the ladle.

The molten steel flow path hole is drilled in the slide gate to move the molten steel. The slide gate is installed so that a pair of upper and lower valve plates face each other to slide in contact with each other. The slide gate acts as a valve while controlling the flow rate of the molten steel by changing the open area of the molten steel flow path while the pair of upper and lower valve plates overlapping each other move.

Here, a contact surface formed by a pair of upper and lower valve plates provided inside the slide gate slides in close contact with each other by a strong surface pressure during operation.

Usually, an elastic member such as a spring is used to maintain a surface pressure acting on a pair of upper and lower valve plates. For example, when the valve plate maintains the surface pressure by using the plurality of coil springs as the elastic member, the coil spring may be compressed to a predetermined length to generate the surface pressure or maintain the generated surface pressure by pressing the valve plate.

Therefore, when the surface pressure between the valve plates does not work normally, air flows in through the gaps between the valve plates, resulting in deterioration of the steel quality or conversely, an accident in which molten steel leaks through the gaps. It is very important to maintain a proper surface pressure on the contact surface.

As a conventional slide gate which maintains the surface pressure on the valve plate by using the elastic force of the spring as described above, the "slide gate valve for molten metal container" disclosed in Korean Patent Registration No. 551476 is known.

As shown in Figures 1 and 2, the slide gate valve is fixed to the metal container portion and the housing 10, the upper valve plate 1 is inserted inward, and the lower valve plate 2 inserted therein; Along the slider unit 20 and the guide track 30 formed on the slider unit 20 or the housing 10 while being fixed to the slider unit 20 and the housing unit 10 or the slider unit 20, which are installed to move forward and backward and up and down together. It is installed on the support means 50 and the support means 50 and the roller 40 which is slid in the front and rear direction, perpendicularly to the housing 10 or the slider unit 20 and connected to the roller 40 Compression spring 60 for providing adhesion to the refractory valve plates (1,2).

In addition, the guide track 30 is provided with a groove portion 31 and an opening 32.

Therefore, the roller 40 is located in the groove portion 31 during the operation of the slide gate. When the roller 40 is located in the groove portion 31, the support means 50 is lowered while compressing the compression spring 60, and as a result, the slider unit 20 is lowered due to the elastic force of the compression spring 60. Since the valve plate 2 is strongly adhered to the upper valve plate 1 side, a strong surface pressure is generated between the valve plates 1 and 2.

On the other hand, the upper and lower valve plates (1, 2) mounted on the slide gate is a refractory material and is a consumable part. Therefore, when the slide gate is used repeatedly, the parts wear out or fall off, and these parts are replaced with new parts at appropriate intervals. In this case, when replacing the new parts, the surface pressure, which was maintained at a constant size, during the operation of the slide gate should be removed.

As shown in Figs. 3 and 4, in order to remove the surface pressure between the valve plates, first, the slider unit 20 must be slid in the front and rear directions. In the process of moving the slider unit 20 in the front-back direction, the roller 40 is located in the opening 32. When the roller 40 is positioned in the opening 32, the elastic force applied to the slider unit 20 side is removed while the compression spring 60 in the compressed state is relaxed. When the repulsion force is removed, the support means 50 is pushed up to the compression spring 60 is relaxed, the surface pressure between the upper, lower valve plate (1, 2) is removed.

When the surface pressure between the upper and lower valve plates 1 and 2 is removed, the closed slide gate is opened, after replacing these refractory consumables, the open slide gate is closed and the slider unit 20 is slid and moved to its original position. The work can be resumed with the proper surface pressure again.

However, the conventional slide gate has a structure in which the slider unit 20 moves back and forth while moving up and down, so that the support means 50, the compression spring 60, and the roller 40 have a slider unit 20. A large external force is encountered in the process of operating to generate and maintain the surface pressure or to remove the surface pressure. In particular, a large transverse pressure in the front-rear direction is applied to the connection portion between the support means 50 and the roller 40, and the transverse pressure is also transmitted to the compression spring 60. When the lateral pressure is applied to the compression spring 60 as described above, a problem arises in that normal surface pressure is not generated between the valve plates while the elastic force applied perpendicularly to the lower valve plate 2 side decreases or becomes uneven.

In addition, if the compression spring 60 repeatedly compresses and tensions in an abnormal state as described above, the compression spring 60 is easily damaged or deformed, and molten steel is easily moved between the valve plates 1 and 2 during operation. There is a high risk of causing a large accident that leaks.

In addition, the conventional slide gate has a structure in which the slider unit 20 moves up and down at the same time as the slider unit 20 moves back and forth, so that the slider unit 20 and the housing 10 are not connected to each other and are necessarily separate hinge members 70. It must be connected through, and should be provided with a locking member 80 such as a hook on the opposite side of the hinge member 70 to be fixed to each other. Accordingly, the size of the slide gate is increased, the structure is complicated, and opening and closing of the slide gate is cumbersome.

In addition, the conventional slide gate has a problem that the surface pressure is removed while the slider unit 20 is slid due to the operator's mistake or malfunction of the device during the molten steel discharge operation, there is always a problem inherent in the risk of safety accident Have

The present invention has been made to solve the above problems, and an object of the present invention is to provide a slide gate which improves reliability of surface pressure retention, which has a simple structure, minimizes size, and facilitates opening and closing operations.

Another object of the present invention is to provide a slide gate in which an accident in which surface pressure is removed during the molten steel discharge operation is prevented.

In order to achieve the above object, the slider gate of the present invention has an upper housing with an upper valve plate mounted therein, a lower housing with a lower valve plate mounted therein and positioned at a lower portion of the housing, and an upper housing or a lower housing. And a pair of elastic hinge members installed vertically through the right side to connect the lower housing or the upper housing so as to elastically move up and down, and to connect the lower housing so as to be opened and closed, and positioned inside the lower housing to support the lower valve plate. The slider is provided with a moving force from the driving cylinder in a state to slide in the front and rear direction, the guide track is provided on the bottom surface of the slider along the moving direction of the slider, and has a groove formed on one side thereof, so that the guide track is in contact with the guide track. Consists of a pair of rollers installed on the left and right sides of the lower housing The features.

The elastic hinge member may include a pair of compression shafts installed vertically through the left and right sides of the upper housing or the lower housing, and a pair of hinge pins penetrating the left and right sides of the lower housing or the upper housing in the front and rear directions. It may be composed of a connection block for connecting the compression shaft and the hinge pin, and a compression spring that is pressed by the compression shaft when the compression shaft is lowered.

In this case, when the roller is located in the groove portion of the guide track, the lower housing is raised and the compression spring is relaxed to remove the surface pressure. When the roller is out of the groove of the guide track, the lower housing is lowered and the compression spring is lowered. This is compressed to produce and maintain the surface pressure.

In addition, the elastic hinge member is preferably disposed in plurality in the front and rear directions of the upper housing or the lower housing.

On the other hand, the stopper pin for limiting the movement of the slider may be detachably coupled to the shaft of the drive cylinder by interfering with the lower housing in the process of pushing the slider.

In this case, when a plurality of stopper pin coupling pinholes are formed on the axis of the drive cylinder, the stopper pin may selectively perform interference with the housing while changing the coupling position with the pinhole.

The present invention configured as described above allows the lower housing to be lifted and connected to the upper housing via an elastic hinge member, and at the same time, the roller is installed inside the lower housing while positioning the slider supporting the lower valve plate while moving back and forth inside the housing. By configuring the roller to support the slider, the lower housing only lifts and lowers the slider while the surface pressure is generated, maintained or removed.

Therefore, as in the prior art, in the process of generating and maintaining or removing the surface pressure, the lateral pressure is not acted between the compression spring and the roller, and the elastic force applied vertically to the lower valve plate side is always applied constantly, thereby improving the reliability of the surface pressure. In addition, there is an effect that can prevent a large accident that the molten steel leaks between the valve plate during operation because the damage and damage of the related parts does not occur.

In addition, since the present invention does not need to connect and fasten the upper housing and the lower housing through a separate hinge member or hook member as in the prior art, the structure of the slide gage is simple and the opening and closing operation can be easily and conveniently performed.

In addition, the present invention, by coupling the stopper pin interfered with the lower housing so that the roller is not located in the groove portion of the guide track when the drive cylinder pushes the slider on the axis of the drive cylinder, during the molten steel discharge operation, There is an effect that can prevent the accident that the surface pressure is removed while the slider unit is sliding due to a malfunction.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

As shown in Figure 5 to 10, the present invention is the upper housing 110 is mounted with an upper valve plate 101 inward; A lower housing 120 mounted to the inner side and having a lower housing 120 positioned below the upper housing 110; Vertically penetrating through the left and right sides of the upper housing 110 or the lower housing 120, respectively, so that the lower housing 120 or the upper housing 110 is elastically lifted and lowered to open and close the lower housing 120. A pair of elastic hinge members 130 for connecting; A slider 140 positioned inside the lower housing 120 and slidingly moved in the front-rear direction by receiving a moving force from the driving cylinder C while supporting the lower valve plate 102; A guide track 150 installed on the bottom of the slider 140 along the moving direction of the slider 140 and having a groove 151 formed at one side thereof; It is composed of a pair of rollers 160 installed on the left and right sides of the lower housing 120 so as to be in contact with the guide track 150.

The upper housing 110 is a rectangular plate (Plate) through which a communication hole (not shown) is formed, is fitted to the outside of the bottom of the molten steel outlet, such as ladle. And inside the upper housing 110, the upper valve plate 101 is mounted in close contact with the bottom surface of the molten steel outlet. The upper valve plate 101 is formed through the molten steel flow path corresponding to the molten steel discharge port.

The lower housing 120 has a plate shape corresponding to the upper housing 110 and is fitted to the outside of the molten steel inlet such as a tundish.

The upper housing 110 and the lower housing 120 are connected to the opening and closing of the lower housing 120 through the elastic hinge member 130. The elastic hinge member 130 is vertically installed on the left and right sides of the upper housing 110 or the lower housing 120 so as to reliably connect the upper housing 110 and the lower housing 120.

On the other hand, the elastic hinge member 130 may be provided in plurality along the front and rear directions of the upper housing 110 and the lower housing 120.

5 to 9 illustrate that the elastic hinge member 130 is installed perpendicular to the upper housing 110, and FIG. 10 illustrates that the elastic hinge member 130 is installed perpendicular to the lower housing 120.

In the present embodiment will be described with reference to Figs.

5 to 8, the elastic hinge member 130 has a pair of compression shafts 131 vertically installed on the left and right sides of the upper housing 110 and the left of the lower housing 120. A pair of hinge pins 132 penetrating in the front-rear direction on the right side, a connecting block 133 connecting the compression shaft 131 and the hinge pin 132, and the compression shaft 131 descends; It may be composed of a compression spring 134 is pressed by the compression shaft 131.

To this end, compression shaft mounting holes 111 are formed at both sides of the upper housing 110.

Therefore, the lower housing 120 may be elastically lifted in the state connected with the upper housing 110 by the elastic hinge member 130. That is, as shown in FIGS. 5 and 6, when the compression shaft 131 descends while compressing the compression spring 134 under an external force, the compression shaft 131 descends along the compression shaft 131, as shown in FIGS. 7 and 8. As described above, when the external force applied to the compression shaft 131 is removed, it is lifted along the compression shaft 131 which rises to the original position by the elastic force of the compression spring 134.

In addition, when the hinge pin 132 of one side of the hinge pins 132 inserted to pass through the left and right sides of the lower housing 120 is removed, the lower housing 120 pivots about the hinge pin 132 of the other side. While the slide gate 100 is open. Meanwhile, when the hinge pins 132 on both sides are removed at the same time, the entire lower housing 120 may be separated from the connection block 133.

The slider 140 is positioned inside the lower housing 120. The end of the slider 140 is connected to the drive cylinder (C) installed on the outside, and receives the sliding force from the drive cylinder (C) is moved in the forward and backward direction.

Guide tracks 150 are installed on the bottom surface of the slider 140 along the moving direction of the slider 140, and rollers 160 are disposed on the left and right sides of the lower housing 120 to correspond to the guide tracks 150. Is installed. The roller 160 helps to move the slider 140 in a stable state in the guide track 150 when the slider 140 is moved. Reference numeral 161 is a rotation axis of the roller 160 fixed to the lower housing 120.

A groove portion 151 is formed inside the guide track 150. Accordingly, when the slider 140 is moved so that the roller 160 is positioned in the groove 151 of the guide track 150, the compression shaft 131 is lifted and the compression spring 134 is relaxed to remove the surface pressure. do. Then, when the slider 140 moves so that the roller 160 leaves the groove 151 of the guide track 150, the compression shaft 131 is lowered and the compression spring 134 is compressed to generate or maintain a surface pressure. do.

On the other hand, as shown in Figure 9, the stopper pin 170 may be detachably coupled to the axis of the drive cylinder (C). When the drive cylinder C pushes the slider 140 while the stopper pin 170 is coupled on the drive cylinder C axis, the stopper pin 170 moves toward the slider 140 along the drive cylinder C axis. While moving it interferes with one side of the lower housing (120).

When the stopper pin 170 and the lower housing 120 interfere with each other, the movement of the slider 140 is stopped because the axis of the driving cylinder C no longer pushes the slider 140. When the movement of the slider 140 is stopped, the roller 160 may not enter the groove 151 of the guide track 150, and thus, the slider 140 may be damaged due to an operator's mistake or malfunction of the device during the molten steel discharge operation. Even if the unit is slid, since the movement of the slider 140 is limited so that the roller 160 is not positioned in the groove 151 of the guide track 150, the accident that the surface pressure is removed can be prevented in advance.

In this case, the first pin hole 180 and the roller 160 limiting the movement of the slider 140 so that the roller 160 can be located in the groove 151 of the guide track on the axis of the drive cylinder C. May be formed in a plurality of second pin holes 190 to restrict the movement of the slider 140 so that they cannot be positioned in the groove 151 of the guide track. In this way, while the operator is operating the stopper pin 170 may be located in the second pin hole 190 to prepare for an accident.

Meanwhile, in FIG. 9, a connection bar 200 is installed on the slider 140 to facilitate maintenance between the drive cylinder C and the slider 140, and the drive cylinder C and the slider are provided through the connection bar 200. The first and second pin holes 180 and the second pin holes 190 formed on the axis of the driving cylinder C are formed in the connection bar 200. As shown in the example, the coupling with the stopper pin 170 is made with the drive cylinder (C).

The operation of the slide gate 100 of the present embodiment configured as described above is as follows.

First, as shown in FIGS. 7 and 8, in the state where the roller 160 is located in the groove 151 on the guide track 150, the initial pressure is not applied, and the upper housing 110 and the lower housing are not. Since 120 is connected through the elastic hinge member 130, a separate fastening means such as a hook for connecting the upper housing 110 and the lower housing 120 is not required as in the related art.

When the driving cylinder C pulls the slider 140 in this state, as shown in FIGS. 5 and 6, the roller 160 is pushed up the slider 140 while being separated from the groove 151. The lower valve plate 102 inside the 140 is raised together with the slider 140. Since the lower valve plate 102 is already in close contact with the upper valve plate 101 in this state, no further rise is made and the roller 160 descends along the guide track 150. When the roller 160 is lowered, the compression housing connected to the roller 160 is lowered while compressing the compression spring 134 by the distance that the roller 160 is lowered, by the elastic force of the increased compression spring 134 The surface pressure of the lower valve plate 102 and the upper valve plate 101 is greatly increased.

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On the other hand, in order to replace the refractory components, the surface pressure acting between the upper valve plate 101 and the lower valve plate 102 should be removed.

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In order to remove the surface pressure, the driving cylinder C may be operated to push the slider 140 so that the roller 160 is positioned in the groove 151 of the original guide track 150. As shown in FIG. 7 and FIG. 8, when the roller 160 is located in the groove 151, the roller 160 that has been lowered is raised and the compression shaft 131 is compressed by the distance of the roller 160 lowered. As it relaxes 134, it rises and the surface pressure is removed.

When the hinge pin 132 of one side is removed from the hinge pins 132 inserted to penetrate the left and right sides of the lower housing 120 in the state where the surface pressure is removed, the lower housing is centered on the hinge pin 132 of the other side. As the 120 is rotated downward, the slide gate 100 is opened.

In addition, both of the hinge pins 132 may be simultaneously removed to open the slide gate 100. That is, when the hinge pins 132 on both sides are removed at the same time, the lower housing 120 is separated from the connection block 133 and dropped from the upper housing 110.

Thus, the operator can open the slide gate 100 very easily to replace refractory parts such as valve plates.

Meanwhile, as shown in FIG. 9, when the stopper pin 170 is inserted into the second pin hole 190 and the second catching groove 202 in the operating state, the slider may be damaged due to an operator's mistake or malfunction of the device. Even if the 140 is moved, the stopper pin 170 interferes with the lower housing 120 so that the movement of the slider 140 is blocked so that the roller 160 is not positioned in the groove 151 of the guide track 150. Be prepared for an accident.

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10 is another embodiment of the present invention, the elastic hinge member 130 is configured to be installed perpendicular to the lower housing 120, compared with the present embodiment, except that the configuration and action is all made in reverse Since the same, detailed description thereof will be omitted.

Hereinafter, a preferred embodiment of the present invention with reference to the drawings, but the scope of the present invention is not limited thereto.

As such, the present invention is not limited to the above-described embodiments, and can be modified by those skilled in the art without departing from the spirit of the present invention, and such modifications will fall within the scope of the present invention.

1 is a state diagram of a general slide gate in use, a front sectional view showing a state in which the surface pressure is applied.

Figure 2 is a side cross-sectional view of the state of Figure 1;

Fig. 3 is a side cross-sectional view showing a state in which surface pressure is removed as a state diagram of use of a general slide gate.

4 is a side cross-sectional view of the state of FIG. 2;

5 is a state diagram showing the use of the slide gate according to the present invention, a front sectional view showing a state in which the surface pressure is applied.

6 is a side cross-sectional view of the state of FIG. 5;

7 is a side view showing the state in which the surface pressure is removed, using the slide gate according to the present invention.

8 is a side cross-sectional view of the state of FIG. 7.

Figure 9 is a side cross-sectional view showing a state in which the stopper pin is coupled to the axis of the drive cylinder so that the roller constituting the present invention is not positioned in the groove portion of the guide track.

Figure 10 is a front cross-sectional view of the use state showing another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100 ... slide gate 101 ... upper valve plate

102 Lower valve plate 110 Upper housing

120 ... lower housing 130 ... elastic hinge member

131 Compression shaft 132 Hinge pin

133 ... Connection block 134 ... Compression spring

140 ... slider 150 ... guide track

151 groove 160 roller

170 ... stopper pin 180 ... 1 pin hole

190 ... 2nd pin hole 200 ... Connecting member

201,202 ... jamming groove C ... drive cylinder

Claims (6)

An upper housing having an upper valve plate mounted therein; A lower housing having a lower valve plate mounted therein and positioned below the upper housing; A pair of elastic hinge members installed vertically through the left and right sides of the upper housing or the lower housing to connect the lower housing or the upper housing to be opened and closed while elastically lifting and lowering the lower housing or the upper housing; A slider positioned inside the lower housing and slidingly moved in the front-rear direction by receiving a moving force from a driving cylinder while supporting a lower valve plate; A guide track installed on the bottom of the slider along a moving direction of the slider and having a groove formed at one side thereof; And And a pair of rollers respectively installed on the left and right sides of the lower housing so as to be in contact with the guide track. The method of claim 1, The elastic hinge member A pair of compression shafts vertically penetrated to the left and right sides of the upper and lower housings; A pair of hinge pins penetrating the left and right sides of the lower housing or the upper housing in the front-rear direction; A connection block connecting the compression shaft and the hinge pin; And And a compression spring compressed by the compression shaft when the compression shaft descends. The method of claim 2, When the roller is located in the groove portion of the guide track, the lower housing is raised and the compression spring is relaxed to remove the surface pressure. And the compression spring is compressed while the lower housing is lowered when the roller is out of the groove of the guide track, thereby generating and maintaining a surface pressure. The method of claim 1, The elastic hinge member is a slide gate, characterized in that disposed in plurality in the front and rear directions of the upper housing or the lower housing. The method of claim 1, Slider pins on the shaft of the drive cylinder is detachably coupled to the lower housing in the process of pushing the slider, the stopper pin for limiting the movement of the slider so that the roller is not located in the groove portion of the guide track. gate. The method of claim 5, A plurality of stopper pin coupling pinholes are formed on the axis of the drive cylinder, The stopper pin is a slide gate, characterized in that for selectively performing interference with the lower housing while changing the engagement position with the pin hole.

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