EA044095B1 - SLIDING VALVE FOR A CONTAINER CONTAINING MOLTEN METAL - Google Patents

Description

Field of technology

The invention relates to a sliding valve for a container functionally containing molten metal, as well as to a method for operating said sliding valve.

State of the art

Sliding clamping devices are often installed on sliding valves for containers containing molten metal. The clamping devices are designed to hold opposing fireproof shutter plates inserted into a given sliding body in a prestressed state so that possible cracks formed in the respective fireproof shutter plates due to extreme operating conditions do not expand further.

Examples of sliding clamping devices are known from US 4,717,128; EP 587485; DE 19615696 C2. The use of pre-stressed fireproof valve plates prevents molten metal from leaking through potential cracks, ensuring proper sealing of the sliding valve. Typically, the prestressed state of each refractory closure plate is achieved by means of a spring element that is prestressed. A disadvantage of this known crack prevention solution is that said spring element can only be adjusted during maintenance. However, these slide elements remain very hot during servicing, making pre-adjustment of the spring element particularly laborious. To overcome this drawback, EP 2906376 B1 proposes automatic clamping of fireproof bolt plates by pressing the sliding block against the sliding body, the clamping mechanism being actuated by the interaction between the sliding block and the sliding body. The disadvantage of this solution is that clamping occurs when the fireproof shutter plates are pressed against each other. The shear forces resulting from the relative displacement between the refractory shutter plates disrupt the simultaneous automatic pretensioning of the refractory shutter plates.

Purpose of the invention

The purpose of the invention is to provide a solution to at least one disadvantage of the method provided by the prior art.

More specifically, the object of the invention is to provide a solution for improving the clamping process of refractory closure plates.

The essence of the invention

To achieve the above object, the invention is directed to a sliding seal for a container that functionally contains molten metal, comprising a sliding body comprising a recess for receiving a first refractory seal plate comprising a first surface with a first flow hole; a sliding block comprising an opening for receiving a second refractory shutter plate comprising a second surface with a second flow opening; wherein said sliding gate is positioned in such a way that the sliding block can be displaced relative to the sliding body in the longitudinal direction; wherein said sliding valve is further positioned such that the gap or pressure between the opposing first and second surfaces of the first and second refractory valve plates is adjustable by parallel displacement in the axial direction; wherein at least one clamping mechanism is located in the sliding body and/or sliding block, and at least one clamping mechanism is configured to clamp a corresponding fireproof shutter plate; wherein the at least one clamping mechanism is configured to begin clamping the corresponding refractory closure plate by actuating the at least one clamping mechanism when the sliding block is offset relative to the sliding body and the first and second refractory closure plates are spaced substantially apart from each other as the first and second surfaces of the respective first and second refractory closure plates are in contact under pressure.

In accordance with specific embodiments of the invention, said device comprises one of the following technical features, taken individually or in any combination thereof:

the at least one clamping mechanism is configured to stop operating the at least one clamping mechanism of the respective refractory closure plate before the first and second surfaces of the respective first and second refractory closure plates are in contact under pressure;

said sliding gate comprises at least one ramp engaged with at least one corresponding guide element located on the sliding block, said ramp and said guide element being configured to move the sliding block away from the sliding body when the sliding block reaches a certain parts of the stroke of the sliding block, in particular the end of the stroke;

at least one clamping mechanism comprises first and second clamping mechanisms, wherein the first clamping mechanism is located on the sliding body and is actuated first

- 1 044095 an interacting element located on the sliding block, and a second clamping mechanism is located on the sliding block and is driven by a second interacting element located on the sliding body;

at least one clamping mechanism comprises at least one spring element;

at least one spring element has the shape of a U-shaped spring clip, wherein two ends of said spring element correspond to two branches of said U-shaped spring clip;

at least one spring element of the sliding body or block comprises a spring element comprising one end of opposite ends abutting a portion of the side wall of a corresponding first or second refractory closure plate, and the other end of opposite ends abutting a pre-tensioning element located on a corresponding sliding body or block;

at least one spring element of the sliding body or block includes an additional spring element comprising one end of opposite ends abutting another part of the side wall of the corresponding first or second refractory closure plate, and the other end of opposite ends abutting an abutment element mounted on the corresponding sliding body or block, or another portion of the side wall of the corresponding first or second refractory closure plate, abuts directly against an abutment element mounted on the corresponding sliding body or block;

each pre-tension element is a sliding element comprising a side wall in sliding contact with the other end of a corresponding at least one spring element of the sliding body or block, wherein both said side wall and the shape of said spring element are configured such that the longitudinal the displacement of said sliding element forces said plate into its recess;

each of the first or second interacting elements includes a gripping profile element;

each gripping profile element contains a ramp adjacent to at least one gripper, preferably two grippers;

each gripping profile element is elastically connected to a corresponding sliding body or block in such a way that said gripping profile element can be displaced in the axial direction;

the sliding element of the sliding body or block contains a protrusion configured to interact with a gripping profile element located on a corresponding opposite sliding block or body, wherein each gripping profile element is configured to push the corresponding sliding element by means of the specified protrusion in the longitudinal direction when the sliding block is displaced relative to the sliding body.

The invention also relates to a method for placing fireproof valve plates in a sliding valve, comprising the following steps:

providing, respectively, first and second clamping mechanisms for the sliding body and the sliding block; inserting, respectively, the first fireproof shutter plate and the second fireproof shutter plate into the recesses of the sliding body and the sliding block when the sliding shutter is in an accessible position;

closing the sliding gate so that the sliding block faces the sliding body;

the initiation of clamping of the first and/or second refractory closure plates when the sliding block is displaced relative to the sliding body and the first and second surfaces of the respective first and second refractory closure plates move away from each other, before the first and second surfaces of the respective first and second refractory closure plates are under operating pressure.

The present invention is also advantageous in that it reduces the time required to replace the refractory closure plates since there is no need to manually tighten the refractory closure plates. In addition, the use of the fireproof shutter plates can be extended due to better compression of the fireproof shutter plate in the corresponding recesses. Moreover, the automatic clamping design allows for more systematic clamping in which the tension can be finely adjusted in a repeatable manner. Finally, the device according to the invention can be configured with different sliding gate and container sizes.

In general, preferred embodiments of each aspect of the invention also apply to other aspects of the invention. As far as possible, each subject of the invention is combined with another subject. The features of the invention are also combined with the embodiments presented in the description, which are also combined with each other.

Brief description of the figures

Preferred aspects of the invention will now be described in more detail with reference to the accompanying drawings, in which like reference numerals denote like features and in which the following is presented:

in fig. 1 is a perspective schematic view of a sliding gate;

in fig. 2 shows a schematic sectional view of a sliding gate;

in fig. 3 is a schematic side view of a sliding gate;

in fig. 4A-4E show a simplified representation of the various stages of displacement of the sliding block relative to the sliding body;

in fig. 5A illustrates a schematic front view of a first embodiment of a sliding body receiving a first fireproof closure plate with two spring elements;

in fig. 5B is a schematic front view of a second embodiment of a sliding body receiving a first fireproof closure plate with one single spring member;

in fig. 6 shows an enlarged schematic view of the interacting element and the gripping profile element.

List of symbols

- Sliding shutter;

6A - sliding body;

6B - sliding block;

6C - guide frame;

8A, 8B - fireproof shutter plate;

22A, 22B - (first) spring element;

24A, 24B - (second) spring element;

26A, 26B - pre-tensioning element;

28A, 28B - thrust element, thrust insert;

- ramp;

- guide element;

40A, 40B - interacting element, capturing the profile element;

42A, 42B - protrusion;

- rollers.

Description of Preferred Embodiments of the Invention

Fig. 1 is a perspective view of a sliding gate 2 for a container containing molten metal (not shown). The sliding gate 2 includes a sliding body 6A attached to said container and a sliding block 6B which is movable relative to the sliding body 6A during operation. The relative displacement between the sliding block 6B and the sliding body 6A allows the flow of molten metal to be controlled.

In fig. 1 sliding valve 2 is in an open, deployed (accessible) position for its maintenance and runs in the vertical direction. To facilitate maintenance, said container can be rotated 90° so that the sliding valve 2, which is usually located horizontally on the bottom of the container, is positioned vertically. The sliding block 6A may slide in a guide frame 6C, which may be connected to the sliding body 6A via a hinge, as shown in FIG. 1. The sliding body 6A and the sliding block 6B include recesses for receiving the first fireproof shutter plate 8A and the second fireproof shutter plate 8B. The first refractory closure plate 8A and the second refractory closure plate 8B respectively comprise a first surface with a first flow hole and a second surface with a second flow hole. In use, the relative positioning of the first flow hole relative to the second flow hole allows the flow of molten metal to be cast to be controlled. Said control can be effected gradually between a fully open position, in which the two holes coincide with each other, and a fully closed position, in which the two holes are completely offset from each other.

In fig. 2 shows the sliding gate 2 in a closed position after the guide frame 6C has been rotated from its open position for servicing, as shown in FIG. 1. In the closed position, the sliding block 6B faces the sliding body 6A. Here, there is a gap between the first and second fireproof shutter plates 8A, 8B. This gap extending in the axial direction can be adjusted by parallel displacement of the sliding block 6B.

The choice of connecting the guide frame 6C to the sliding body 6A is not limited to the hinge connection, but any other suitable connection can be provided. For example, the guide frame 6C is not needed in some cases where the slide block 6B is directly attached to the slide body 6A.

The sliding block 6B is configured to move, in addition to the axial direction, in the longitudinal direction. The displacement along the longitudinal direction is used not only to control the flow of molten metal poured when using the container, but also to adjust the gap or pressure between the first and second refractory closure plates 8A, 8B. Indeed, in FIG. 3 shows that parallel displacement of the sliding block 6B can be achieved

- 3 044095 by at least one ramp 30 located, for example, on a guide frame 6C engaged with corresponding guide elements 32 located on the sliding block 6B. The longitudinal displacement of the sliding block 6B relative to the sliding body is provided by a driving element (not shown), such as a hydraulic actuator or the like. Said drive element may be located on a guide frame. The movable end of the drive element may be attached to the sliding block 6B in a form fit manner (not shown). The ramps 30 and guide members 32 may be configured to increase the clearance between the sliding block 6B and the sliding body 6A when the sliding block 6B reaches a certain portion of the stroke of the sliding block 6B. This specific portion represents the end of the stroke (overlap stroke) of the sliding block 6B, as shown in FIG. 3.

In fig. 4A-4E show a schematic representation of the various stages of displacement of the sliding block 6B relative to the sliding body 6A attached to a container (not shown).

In fig. 4A shows the sliding block 6B and the sliding body 6A spaced apart from each other, with the sliding body 6A being in the end-of-stroke position. In this position, the first and second refractory plates are weakened so much that the spring elements 22A, 22B are not yet under tension of the corresponding pretension elements 26A, 26B, which do not yet interact with the corresponding gripping profile element 40A, 40B. The corresponding clamping mechanisms on each part include at least one spring element 22A, 22B and a corresponding pre-tension element 26A, 26B.

After the first and second refractory plates 8A, 8B are inserted into their respective recesses, the clamping process begins by moving the sliding body 6B to the right as indicated by the arrow in FIG. 4A.

In fig. 4B shows the moment just before the end of the clamping process. The spring members 22A, 22B are symbolically represented as compressed, indicating that the first and second refractory plates 8A, 8B are clamped in their respective recesses. The clamping process preferably ends when the sliding block 6B and the sliding body 6A are still spaced apart, allowing each refractory board 8A, 8B to be correctly positioned without having to overcome shear forces between both refractory boards 8A, 8B.

Between the steps shown in FIG. 4A and 4B, the sliding block 6B moves relative to the sliding body 6A in the longitudinal direction (indicated by the arrow) and optionally in the axial direction. One skilled in the art will know how to perform the longitudinal direction and/or the axial direction by adjusting, for example, the inclination of the ramp 30 and the guide member 32.

After the clamping of the first and second refractory plates 8A, 8B is actuated, the gripping profiles 40A and 40B are released from the pretensioning member 26A, 26B so that no further pressure is applied (not shown). The pre-tensioning elements 26A, 26B are designed such that they are locked in place after engagement with the corresponding gripping profile elements 40A, 40B. To achieve this, the pretensioner 26A, 26B may be pretensioned frictionally or by a one-way clutch system.

In fig. 4C shows the moment when the first and second refractory plates 8A, 8B, despite being in direct contact with each other, are still not under operating pressure. Between the steps shown in FIG. 4B and 4C, the sliding block 6A is moved relative to the sliding body 6B in the longitudinal direction (indicated by the arrow) and the axial direction to close the gap between the two fireproof shutter plates 8A, 8B.

In fig. 4D shows the moment when the pressure between the first and second refractory plates reaches an operating level (operating pressure) sufficient to properly seal the sliding gate 2. Between the steps shown in FIG. 4C and 4D, the sliding block 6B moves relative to the sliding body 6A in the longitudinal direction. During this linear movement, the pressure between the first and second refractory plates 8A, 8B is increased by a special mechanism, which preferably includes a plurality of rollers 50 offset relative to the sliding block 6B, as shown in FIG. 3. The rollers 50 are preferably in direct contact with the opposite surface of the sliding block 6B. The profile of the opposite surface of the sliding block 6B is designed such that the operating pressure remains within a predetermined pressure range. During this linear movement, the shear forces between the two refractory shutter plates 8A, 8B also increase. Since the onset of clamping of the refractory shutter plates 8A, 8B occurs as they move away from each other, the positioning and preloading of each refractory shutter plate remains stable even under shearing forces. It should be noted that the positioning of the fireproof shutter plates 8A, 8B is facilitated when the clamping process is completed before both plates 8A, 8B touch each other.

In fig. 4E shows the moment when the openings of the first and second refractory closure plates 8A, 8B coincide, providing maximum pouring flow of molten metal.

In fig. 5A shows a diagram including a (first) fireproof closure plate 8A clamped

- 4 044095 mechanism 22A, 24A, 26A, 28A, as well as a gripping element 40A located on the contact surface of the sliding body 6A. The clamping mechanism 22A, 24A, 26A, 28A preferably includes a pretension element 26A, a first spring element 22A, a second spring element 24A, and a stop element 28A. The same arrangement is present on the opposite contact surface on the sliding block 6B (not shown). The sliding block 6B and the sliding body 6A cooperate and are directed so as to be pressed against each other. For example, the gripping profile 40B of the sliding block 6B (not shown) may actuate the pretensioning element 26A of the sliding body 6A and vice versa.

In addition, the sliding body in FIG. 5A includes first and second spring members 22A, 24A located on both sides of the fireproof shutter plate 8A. Each spring element 22A, 22B is preferably shaped like a U-shaped spring clip. Each spring element 22A, 24A can be equivalently described as having the shape of a crab claw. Each spring element 22A, 24A is rotatably positioned on a shaft on a corresponding sliding body 6A. Preferably, the axis of rotation is located at the middle position of the corresponding spring element 22A, 24A at the middle position (top) of the U-shaped spring clip (crab claw). The first spring element 22A has one end (one leg of the U-shaped spring clip) abutting a portion of the side wall of the corresponding first closure plate 8A, and the other end (the other leg of the U-shaped spring clip) abuts the pre-tension element 26A (for example, the sliding member 26A ), movably attached to the sliding body 6A. When the sliding block 6B is moved relative to the sliding body 6A, a gripping member 40B (not shown) of the sliding block (not shown) engages with a protrusion 42A, 42B formed on the sliding member 26A. The sliding member 26A is preferably at least guided by a rod extending between the two abutting ends. The rod may pass through the hole formed in the sliding member 26A. The sliding element 26A preferably has one side directed towards sliding contact with a corresponding leg of the spring element 22A.

During the clamping process, the sliding member 26A moves from one thrust end to the other. Once the sliding element 26A contacts an adjacent leg of the first spring element 22A, the first spring element 22A preferably begins to rotate and the linear movement of the sliding element 26A is converted into a slight rotation of the first spring element 22A.

As soon as the other leg of the first spring element 22A abuts the refractory shutter plate 8A, the refractory plate 8A is pushed by the other leg of the spring element 22A. As the sliding member 26A moves further, the fireproof shutter plate is pressed against the second spring member 24A. The second spring element 24A may also be rotatably positioned on the sliding body 6A. The amplitude of rotation of the second spring element may be limited by a stop element 28A (eg, an insert, as shown in FIG. 5A, or integrally formed in the sliding body 6A, not shown). Effective clamping of the refractory plate 8A begins when all gaps between the elements of the clamping mechanism disappear. The longitudinal displacement of the sliding element 26A is aimed at pressing the refractory shutter plate into its recess. After this step, any additional stroke of the sliding element 26A is converted into a prestress of the fireproof shutter plate 8A. Actuation of the clamping process occurs when the gripping profile 40B (not shown) is detached from the projections 42A, 42B formed on the sliding member 26A. Once released, the sliding member 26A is preferably held in place by friction between the sliding member 26A and the spring member 22A.

The above-described arrangement of the sliding body 6A is applicable to the sliding block 6B.

As an alternative to the clamping mechanism in FIG. 5A of the sliding body 6A in FIG. 5B includes only one spring element 22A located on only one side of the fireproof shutter plate 8A. The only difference between this embodiment and the previous embodiment is that only one spring element 22A, 22B is used and the fireproof bolt plate 8A directly abuts the thrust element 28A (for example, an insert as shown in Fig. 5B, or integrated into the sliding body 6A , not shown) located on the side of the sliding body 6A opposite the sliding member 26A. During the clamping process in this embodiment, it should be noted that as soon as the other leg of the spring member 26A abuts the fireproof shutter plate 8A, the fireproof shutter plate 8A is pushed by the other leg of the spring member 22A until the fireproof shutter plate 8A directly abuts the thrust member 28A. The above-described arrangement of the sliding body 6A is applicable to the sliding block 6B.

In fig. 6 shows in detail the interaction between the first and second engaging profile element (ie, interacting element) 40A, 40B, shown in an enlarged view in accordance with FIG. 3. Each interacting element 40A, 40B includes a ramp adjacent to at least one gripper, preferably two grippers. Each gripping profile element 40A, 40B is elastically connected to a corresponding sliding body 6A or block 6B by means of a biasing element (eg, a pair of coil springs) so that the corresponding gripping profile element 40A, 40B can be displaced in the axial direction. When how much

-

Claims (15)

The sliding block 6A is located at the end of the stroke (left side in Fig. 3), the protrusion 42A, 42B formed on the corresponding sliding member 26A, 26B extends inside the groove formed by two adjacent jaws. When the sliding block 6B is moved relative to the sliding body 6A, the side of one of the grips engages the corresponding side of the protrusion 42A, 42B such that the corresponding sliding member 26A, 26B is pulled in the longitudinal direction by the contacting grip of the gripping profile 40A, 40B. Once the sliding element 26A, 26B exerts a certain level of resistance after increasing the preload of the first or second refractory closure plate 8A, 8B, the biasing element of the gripping profile 40A, 40B is compressed by the force in the axial direction resulting from the pressure exerted by the projection 42A, 42B to the gripping profile element 40, 40V. The axial force is determined by the shape of the profiles selected for the projections 42A, 42B and the grips. Once the displacement between the sliding body 6B and the sliding block 6A reaches a certain amplitude, the projections 42A, 42B are released from the gripping profile 40A, 40B. Although the invention has been described and illustrated in detail, it is clearly understood that it is provided by way of illustration and example only and is not to be construed as limiting, and the scope of the present invention is limited only by the provisions of the appended claims. CLAIM 1. A sliding valve (2) for a container that functionally contains molten metal, comprising a sliding body (6A) containing a recess for receiving a first fireproof closure plate (8A) containing a first surface with a first flow hole; a sliding block (6B) comprising an opening for receiving a second fireproof shutter plate (8B) comprising a second surface with a second flow hole; wherein said sliding gate (2) is designed in such a way that the sliding block (6B) is able to move relative to the sliding body (6A) in the longitudinal direction; wherein said sliding valve (2) is further configured in such a way that the gap or pressure between the opposing first and second surfaces of the first and second refractory valve plates (8A, 8B) is adjustable by parallel displacement in the axial direction; wherein at least one clamping mechanism (22A, 24A, 26A, 28A, 22B, 24B, 26B, 28B) is located in the sliding body (6A) and/or sliding block (6B), wherein at least one clamping mechanism (22A , 24A, 26A, 28A, 22B, 24B, 26B, 28B) is configured to clamp the corresponding fireproof shutter plate (8A, 8B); wherein at least one clamping mechanism (22A, 24A, 26A, 28A, 22B, 24B, 26B, 28B) is configured to begin clamping the corresponding fireproof closure plate (8A, 8B) by actuating the at least one clamping mechanism ( 22A, 24A, 26A, 28A, 22B, 24B, 26B, 28B) when the sliding block (6B) is offset relative to the sliding body (6A) and the first and second fireproof closure plates (8A, 8B) are removed from each other before the first and second surfaces of the respective first and second refractory closure plates (8A, 8B) are in contact under pressure. 2. The sliding valve (2) according to claim 1, characterized in that at least one clamping mechanism (22A, 24A, 26A, 28A, 22B, 24B, 26B, 28B) is configured to stop actuation of at least one clamping mechanism of the respective refractory closure plate (8A, 8B) before the first and second surfaces of the respective first and second refractory closure plates (8A, 8B) are in pressure contact. 3. A sliding gate (2) according to any one of the preceding claims, characterized in that said sliding gate (2) comprises at least one ramp (30) engaged with at least one corresponding guide element (32) located on sliding block (6B), wherein said ramp (30) and said guide element (32) are configured to move the sliding block (6B) away from the sliding body (6A) when the sliding block (6B) reaches a certain portion of the stroke of the sliding block (6B) ), in particular the end of the move. 4. A sliding gate (2) according to any one of the preceding claims, characterized in that at least one clamping mechanism (22A, 24A, 26A, 28A, 22B, 24B, 26B, 28B) comprises first and second clamping mechanisms (22A, 24A , 26A, 28A, 22B, 24B, 26B, 28B), wherein the first clamping mechanism (22A, 24A, 26A, 28A) is located on the sliding body (6A) and is driven by the first interacting element (40B) located on the sliding block (6B), and a second clamping mechanism (22B, 24B, 26B, 28B) is located on the sliding block (6B) and is driven by a second interacting element (40A) located on the sliding body (6A). 5. A sliding gate (2) according to any one of the preceding claims, characterized in that at least one clamping mechanism (22A, 24A, 26A, 28A, 22B, 24B, 26B, 28B) contains at least - 6 044095 at least one spring element (22A, 24A, 22V, 24V). 6. The sliding valve (2) according to claim 5, characterized in that at least one spring element (22A, 24A, 22B, 24B) has the shape of a U-shaped spring clip, and the two ends of said spring element (22A, 24A, 22B, 24B) correspond to two branches of the U-shaped spring clip. 7. The sliding gate (2) according to claim 6, characterized in that at least one spring element (22A, 24A, 22B, 24B) is rotatable on a shaft mounted on the corresponding sliding body (6A) or block (6B ), wherein the axis of rotation is located in the middle position of the specified spring element (22A, 24A, 22B, 24B) on the top of the U-shaped spring bracket. 8. A sliding valve (2) according to any one of claims 6 and 7, characterized in that at least one spring element (22A, 22B, 24A, 24B) of the sliding body (6A) or block (6B) contains a spring element (22A , 22B) comprising one end of opposite ends abutting a portion of the side wall of the corresponding first or second refractory closure plate (8A, 8B), and the other end of opposite ends abutting a pretensioning element (26A, 26B) located on the corresponding sliding body (6A) or block (6B). 9. Sliding gate (2) according to any one of claims 5 to 8, characterized in that at least one spring element (24A, 24B) of the sliding body (6A) or block (6B) contains an additional spring element (24A, 24B) comprising one end of opposite ends abutting another portion of the side wall of a corresponding first or second refractory closure plate (8A, 8B), and the other end of opposite ends abutting a thrust member (28A, 28B) mounted on a corresponding sliding body ( 6A) or block (6B), or wherein another portion of the side wall of the corresponding first or second fireproof closure plate (8A, 8B) abuts directly against a thrust member (28A, 28B) mounted on the corresponding sliding body (6A) or block (6B) ). 10. The sliding gate (2) according to claim 8, characterized in that each pre-tension element (26A, 26B) is a sliding element (26A, 26B) comprising a side wall in sliding contact with the other end of the corresponding at least one spring element (22A, 22B) of the sliding body (6A) or block (6B), wherein both said side wall and the shape of said spring element (22A, 22B) are configured such that longitudinal displacement of said sliding element (26A, 26B) ) presses said plate (8A, 8B) into its recess. 11. Sliding gate (2) according to claim 4, characterized in that each of the first or second interacting elements (40A, 40B) includes a gripping profile element (40A, 40B). 12. Sliding gate (2) according to claim 11, characterized in that each gripping profile element (40A, 40B) comprises a ramp adjacent to at least one gripper, preferably two grippers. 13. A sliding gate (2) according to any one of claims 11 and 12, characterized in that each gripping profile element (40A, 40B) is elastically connected to a corresponding sliding body (6A) or block (6B) such that said gripping profile the element (40A, 40B) has the ability to move in the axial direction. 14. A sliding gate (2) according to any one of claims 11 to 13, characterized in that the sliding element (26A, 26B) of the sliding body (6A) or block (6B) contains a protrusion (42A, 42B) configured to interact with a gripping profile element (40A, 40B) located on a corresponding opposite sliding block (6B) or housing (6A), wherein each gripping profile element (40A, 40B) is configured to push a corresponding sliding element (26A, 26B) by means of said protrusion in the longitudinal direction when the sliding block (6B) is displaced relative to the sliding body (6A). 15. The method of placing fireproof valve plates (8A, 8B) in a sliding valve (2) according to any of the preceding paragraphs, including the following steps: providing, respectively, first and second clamping mechanisms (22A, 24A, 26A, 28A, 22B, 24B, 26B, 28B) for the sliding body (6A) and the sliding block (6B); inserting, respectively, the first fireproof shutter plate (8A) and the second fireproof shutter plate (8B) into the recesses of the sliding body (6A) and the sliding block (6B), respectively, when the sliding shutter (2) is in an accessible position; closing the sliding gate (2) so that the sliding block (6B) faces the sliding body (6A); the beginning of clamping of the first and/or second refractory closure plates (8A, 8B) when the sliding block (6B) is displaced relative to the sliding body (6A) and the first and second surfaces of the corresponding first and second refractory closure plates (8A, 8B) are spaced apart before the first and second surfaces of the respective first and second refractory closure plates (8A, 8B) are under operating pressure. -