DE102014106000A1 - Einplattenschieber - Google Patents

Abstract

The invention relates to a Einplattenschieber for chemical and petrochemical plants with a slide housing (10) having a lockable guide tube (11) and a slide plate (12) which is displaceable in an open position and in a closed position and vice versa, wherein the guide tube (11) a sealing seat (13a) is associated, which extends along the circumference of the guide tube (11) and seals in operation, at least in the closed position from above against the slide plate (12). It is characterized in that the slide plate (12) arranged in a displaceable support plate (14) and relative to the support plate (14) in the direction of the longitudinal axis of the guide tube (11) is movable, wherein a pressing device (26) under the slide plate (12 ) is arranged to press the slide plate (12) in the closed position against the upper sealing seat (13 a).

Description

The invention relates to a Einplattenschieber with the features of the preamble of claim 1. Such Einplatttenschieber is, for example EP 1 379 604 A1 known.

Generic Einplattenschieber be used in the chemical and petrochemical industry, especially in so-called Koker systems. In such plants, residues from the oil refinery are processed. A preferred method for this purpose is the delayed coking, in which the residues to be processed in a coking drum (coke drum) are converted to petroleum coke or petroleum coke, liquid and gaseous hydrocarbons. Processing in the coking drum takes place at approx. 3 to 8 bar and a temperature of approx. 500 ° C. The petroleum coke is cured with water vapor and water and then cut out of the coking drum with a jet of water.

During the reaction, the coking drum is closed. To cut out the petroleum coke, this is opened. Opening the drum is dangerous because it can cause the escape of very hot and combustible gases. The opening of the coking drum, the so-called de-heading, is therefore automatic. For this purpose, slides are used which are connected to a corresponding drum opening and close or release it.

Due to the high process temperatures and pressures, the valves must be sealed accordingly. For a trouble-free operation, the slide should also be easy to operate.

There are so-called double plate pushers and single plate pushers. The double plate slides have two parallel spaced slide plates, which are spread by a wedge mechanism. In the closed position thereby a high sealing force is generated, which allows the safe and reliable operation of the double plate slide. Panel gate valves are simpler and have a lower overall height. They have preloaded sealing systems that produce the required sealing force.

Such a Einplattenschieber is for example from the aforementioned EP 1 379 604 A1 known.

The well-known Einplattenschieber has a one-piece slide plate, at the distal end of a pipe bridge is formed through which takes place in the open position of the slide access to the coking drum. For this purpose, the slide housing on a guide tube, which is bolted in use with the coking drum. In the open position, the pipe bridge is aligned with the guide tube. In the closed position, the guide tube is blocked by the closed part of the one-piece slide plate. The sealing in the closed position is achieved by the combination of a dynamic sealing seat with a static sealing seat. The dynamic sealing seat is achieved by a plurality of distributed on the circumference of the guide tube arranged piston, which press with a wedge against a corresponding wedge surface of a sealing ring. By an axial movement of the piston, the sealing ring is moved downwards and presses against the slide plate. The piston is resiliently biased so that it can compensate for thermal expansion. Through the dynamic sealing system, the sealing force is introduced via the sealing ring in the slide plate.

The known system is relatively expensive and can only produce limited sealing forces. Thus, the manufacturing and maintenance costs are relatively high in the known Einplattenschieber. Moreover, the safety of the known Einplattenschiebers is not high enough.

The invention has the object to improve a Einplattenschieber of the type mentioned with a view to the reliability.

According to the invention this object is achieved by a Einplattenschieber with the features of claim 1.

An essential point of the invention is to provide a single plate gate valve for chemical and petrochemical plants with a gate valve housing. The slide housing has a lockable guide tube and a slide plate, which is displaceable in an open position and in a closed position and vice versa. The guide tube is associated with a sealing seat which extends along the circumference of the guide tube and seals in operation, at least in the closed position from above against the slide plate. The slide plate is arranged in a displaceable carrier plate. The slide plate is movable relative to the carrier plate in the direction of the longitudinal axis of the guide tube. A pressing device is arranged under the slide plate to press the slide plate in the closed position against the upper sealing seat.

The invention has several advantages.

With the invention, higher sealing forces can be generated. For this purpose, the pressing device is arranged under the slide plate, where more space is available, so that the individual Components of the pressing device can be made correspondingly larger. A fundamental difference from the known single-plate slides is therefore that in the invention, the entire slide plate is pressed against the sealing seat. In the prior art, conversely, the sealing seat is pressed against the slide plate. According to the invention, it is provided that the slide plate is arranged in the carrier plate and is movable relative thereto in the direction of the longitudinal axis of the guide tube. The carrier plate and the slide plate thus form two independent components which are movable relative to each other. In contrast, in the prior art, the slide plate is integrally formed, so that it can not be pressed as a whole against the sealing seat, since the one-piece slide plate is guided as a whole in the slider housing longitudinally movable.

The Anpressfunktion the Einplattenschiebers invention can also be used to lock the slide plate in the closed position, so that an accidental displacement of the slide plate is reliably prevented. This is not possible with a conventional dynamic sealing seat.

The relative to the carrier plate movable slide plate has the further advantage that it can be removed from the carrier plate and is easily replaced for maintenance. The carrier plate remains in the housing.

The functional separation of slide plate and carrier plate has the further advantage that the slide plate and the carrier plate are decoupled, so that the thermal distortion of the slide plate does not influence the carrier plate and thus the guide in the slide housing or at least only to a small extent.

The separate slide plate has the further advantage that different materials for the slide plate and the support plate can be used. The material quality of the slide plate can therefore be adapted to the special requirements that are placed on the slide plate as a shut-off device for the coking drum. The same applies to the surface finish treatment, which may be limited to the slide plate. This reduces the manufacturing costs.

Preferred embodiments of the invention are specified in the subclaims.

Thus, the slide plate can be arranged with radial play in the carrier plate. This effectively prevents thermal expansion of the slide plate being transferred to the carrier plate. In addition, the insertion of the slide plate in the carrier plate during assembly or maintenance is facilitated by the radial clearance.

Preferably, the shape of the slide plate is adapted to the cross section of the guide tube. Usually, the guide tube forms a circular cross-section. In this case, the slide plate is formed as a circular disc. The circular disc has the advantage that the thermal distortion takes place radially. For non-circular slide plates, as in the prior art, the thermal distortion is usually uncontrolled, which can lead to problems with the tightness and the leadership of the slide plate.

In a preferred embodiment, the carrier plate has a passage opening and a receiving opening, wherein the slide plate is arranged in the receiving opening. In the open position, the passage opening is aligned with the guide tube. The passage opening can also be referred to as a pipe bridge. In the closed position, the slide plate arranged in the receiving opening obstructs the guide tube.

The receiving opening may have a conically downwardly enlarging edge. This ensures that any impurities that can reach between the edge of the slide plate and the edge of the receiving opening can be dissipated down.

The directions above and below refer to the installation position of the slider. In the installed position of the slide, the longitudinal axis of the guide tube is vertically aligned. The carrier plate with the slide plate is in the horizontal direction, d. H. moved perpendicular to the longitudinal axis of the guide tube. The shut-off device is located in the installation position under the slide plate. The slide plate is thus arranged in the closed position between the shut-off device and the coking drum.

In a further preferred embodiment, the carrier plate is arranged between an upper and a lower guide plate, which each have a passage opening in the region of the guide tube, wherein the carrier plate is encapsulated between the guide plates. With the two guide plates, the linear guide of the carrier plate is achieved. In addition, the guide plates seal the carrier plate and thus the slide plate, so that neither in the open position nor in the closed position gases or liquids can penetrate into the slide housing. The tightness of the valve body can be further improved by the action of the valve body with an overpressure.

The draft tube may form an upper and a lower pipe socket, wherein the upper pipe socket is removable together with the upper sealing seat from the valve body to form a maintenance opening through which the valve plate is removable from the valve body. With the maintenance opening provided in the range of the guide tube opening in the valve body is enlarged in such a way that the slide plate can be removed through the maintenance opening. It is therefore no longer necessary to remove the slide plate in the longitudinal direction of the housing, which is associated with a great deal of effort. For the exchange of the slide plate so only the guide tube must be removed together with the upper sealing seat, so that then the slide plate can be removed from the top of the housing.

The upper sealing seat has an at least single-acting, static sealing system which cooperates with an upper surface of the slide plate. In contrast to the prior art, it is therefore not necessary to provide a dynamically acting sealing system which applies the required sealing force. Rather, a comparatively simple sealing system can be used, against which the slide plate as a whole is pressed. It is also possible to use a double acting, a triple acting or a quadruple acting static sealing system to improve the sealing function. In a double-acting sealing system, two separate sealants are combined. In a triple-acting sealing system, three separate sealants are combined, and so on.

In a particularly preferred embodiment, a sealing seat with a triple-acting sealing system at least one radially inwardly disposed sealing and scraping edge, at least one radially outwardly disposed metal seal and between a gas in particular vapor barrier have. The radially inwardly arranged sealing and scraping edge, which is also referred to as a scraper, forms a metal seal which seals against the surface of the slide plate. In addition, scraping off with the edge impurities that are baked on the surface of the slide plate. The seal arranged radially on the outside is likewise a metal seal which seals against the surface of the slide plate. The interposed gas barrier effectively prevents the ingress of gases and liquids into the interior of the valve body.

Preferably, the pressing device is arranged at least in sections along the outer circumference of the slide plate. This ensures that the passage opening formed by the guide tube is free of installation, so that the petroleum coke or other residues from the coking drum can be dissipated unhindered through the guide tube to the outside. The arrangement of the pressing device along the outer circumference of the slide plate thus means that the pressing device does not project beyond the inner diameter of the guide tube.

Preferably, the pressing device has a ring, which rests in the closed position on the underside of the slide plate and can be acted upon by a contact force, which acts in the direction of the longitudinal axis of the guide tube. This ensures that a uniform contact force is transmitted from the pressing device on the slide plate, so that a correspondingly uniform sealing effect is achieved over the entire circumference of the slide plate. The force acting in the direction of the longitudinal axis of the guide tube contact force thus acts in the installed position in the vertical direction or perpendicular to the slide plate.

Preferably, the ring forms a lower sealing seat, in particular in the form of a further metal seal, which seals against the underside of the slide plate. The ring thus has the dual function, on the one hand to transmit the sealing force of the pressing device on the slide plate, at the same time the ring forms a seal that prevents contaminants from entering the slide housing.

In a particularly preferred embodiment, the pressing device has a plurality of distributed on the circumference of the slide plate force means which generate to act on the slide plate with a contact force each acting in the direction of the longitudinal axis of the guide tube force. This ensures that at several points on the circumference of the slide plate, the contact force is introduced into the slide plate, so that it is pressed evenly against the upper sealing seat.

The power means may comprise eccentric rotatably mounted in the valve body. By a rotational movement of the eccentric press this against the slide plate, in particular against the ring, which then presses against the slide plate. As a result, the contact force is generated in a simple mechanical manner.

Alternatively, the power means comprise lifting cylinder and / or lifting spindle, which are arranged in recordings on the slide housing.

The pressing device, in particular the ring can be biased against the slide plate. This ensures that the ring with a continuous force against the slide plate Press, so that the sealing function, in particular of the ring is maintained, even if the pressing device is not active.

Preferably, a plurality of spring assemblies, in particular cup spring packages are distributed on the circumference of the ring, which act on the ring in each case with a force acting in the direction of the longitudinal axis of the guide tube spring force. Thereby, the sealing force of the lower sealing seat is generated, even when the pressing device is at rest.

The invention will be explained in more detail below with reference to the accompanying schematic drawings with further details based on embodiments. In this show

1 a perspective view of a Einplattenschiebers according to an embodiment of the invention;

2 a longitudinal section of the Einplattenschiebers according to 1 ;

3 : an exploded view of Einplattenschiebers according to 1 ;

4 : A detailed view of the single-plate gate valve according to 1 in the edge region of the slide plate;

5 : Another detailed view of the single-plate gate valve according to 1 in the edge region of the slide plate;

6 FIG. 2 is a partially cutaway perspective view of a single-plate gate valve according to another embodiment; FIG.

7 a section in the transverse direction of Einplattenschiebers according to 6 in the closed position; and

8th : A side view of a Einplattenschiebers according to another embodiment.

The Einplattenschieber according to 1 is used in coking plants, especially in delayed coker plants in which coking drums are provided with shut-off devices. Specifically, the in 1 illustrated Einplattenschieber used to close the lower outlet opening of a coking drum (bottom de-heading). It is also possible, the concept according to the invention, which in the Einplattenschieber according to 1 is implemented in a shut-off, which is used to open and close the upper outlet opening of the coking drum (top de-heading). Moreover, the inventive concept or general invention can be used in connection with shut-off devices used in other industrial sectors such as ethylene, FCCU, phosgene, etc. In general, the single-plate gate valve according to the exemplary embodiment of the invention or, in general, the invention can be used as a shut-off device in chemical and petrochemical plants.

The in 1 illustrated Einplattenschieber has a slide housing 10 on. The slide housing 10 is between two hoods 27 arranged, extending in the longitudinal direction of the valve body 10 extend. The two hoods 27 and the slider housing 10 are bolted together. The two hoods 27 enclose the displacement distances of the internals arranged in the slide housing, which are required in order to actuate the single-plate slide. The slide housing 10 has a guide tube 11 on, that a fluid passage 28 forms. The fluid passage 28 In the assembled state, it aligns with the outlet opening of the coking drum (not shown). Through the fluid passage 28 the petroleum coke fractions located in the coking drum are removed, for example by water jet cutting. The guide tube 11 has an in 1 illustrated upper pipe socket 18 , with the slider housing 10 is screwed. The guide tube 11 , specifically the upper pipe socket 18 is an upper sealing seat 13a assigned in 2 you can see. The upper pipe socket 18 has an annular flange 29 on that with the slider housing 10 is screwed.

In 1 It can also be seen that the inner diameter of the guide tube 11 a hard armor 30 which has the guide tube 11 protects against abrasive wear.

The guide tube 11 extends along a in 1 marked longitudinal axis. In the installed state, the longitudinal axis runs in the vertical direction. The longitudinal axis of the guide tube is aligned with the longitudinal axis of the coking drum, not shown.

In 1 It can also be seen that the slider housing has a purge gas connection 31 has, which is arranged at the upper edge of the slider housing. The flushing and sealing gas connection supplies the sealing seat 13a with flushing or blocking gas. Specifically, in the Einplattenschieber according to 1 Steam used as a sealing gas.

At the lower longitudinal edge of the valve body 10 is a pressing device 26 provided, specifically an actuating cylinder 32 that with a twisting ring 33 connected is. The actuating cylinder 32 and the twisting ring 33 form parts of the Anpressseinrichtung described in more detail elsewhere 26 , In the single-plate slide according to 1 is enough single actuating cylinder 32 , But it can also be provided more actuating cylinder, for example on opposite slide housing sides. At least one more actuating cylinder 32 may be provided, in the opposite direction to the twist ring 33 engages, allowing a twisting moment by the first actuating cylinder 32 is reinforced.

At the two hoods 27 are more gas connections 45 provided, which serve to pressurize the two hoods or the valve body with a sealing pressure.

From the in 1 right hood 27 protrudes in the longitudinal direction of an actuating rod, with which the Einplattenschieber is brought into the open or closed position. The actuating rod is connected in use with a suitable drive.

In the 2 and 3 is the structure of Einplattenschiebers according to 1 to recognize. In the slide housing 10 is a slide plate 12 arranged, which is displaceable in an open position and in a closed position and vice versa. In the open position gives the slide plate 12 the draft tube 11 free, so that the coking drum flanged to the guide tube is accessible. In the closed position, the slide plate blocks 12 the draft tube and prevents the gases, liquids and solids in the coking drum from being retained. The sealing of the slide plate 12 takes place through an upper sealing seat 13a ,

The position designations "top" and "bottom" refer to the operating state of the single-plate slide, which is arranged horizontally. As in the 2 . 3 in connection with 1 to recognize, the sealing seat extends 13a along the circumference of the guide tube 11 , specifically along the circumference of the upper pipe socket.

A special feature of the Einplattenschiebers according to 1 - 3 is that the slide plate 12 in a movable carrier plate 14 is arranged. The slide plate 12 and the carrier plate 14 are two separate components that have different functions. The slide plate 12 serves only the closure of the guide tube 11 , The carrier plate 14 holds the slide plate 12 and moves them into the open position or in the closed position and vice versa. For this purpose, the support plate 14 a receiving opening 16 on, in which the slide plate 12 is arranged (see 2 . 3 ). The receiving opening 16 is dimensioned so that the slide plate 12 relative to the carrier plate 14 in the direction of the longitudinal axis of the guide tube 11 is mobile. In other words, the slide plate 12 be moved perpendicular to its radial extent. This is a corresponding match between the slide plate 12 and the receiving opening 16 adjusted, which is such that a tilting of the two components by thermal expansion of the slide plate 12 and the carrier plate 14 is prevented. Purpose of the axial mobility of the slide plate 12 it is, the pressing of the slide plate 12 against the upper static sealing seat 13a to enable. The contact pressure is achieved by the already mentioned pressing device 26 achieved in the installation position under the slide plate 12 is arranged.

With the axially movable slide plate 12 and the pressing device 26 is achieved that in the closed position of the slide plate 12 this against the upper sealing seat 13a can be pressed, so that the sealing force between the upper sealing seat 13a and the slide plate 12 is increased.

The carrier plate 14 points in addition to the receiving opening 16 a passage opening 15 on, which can also be referred to as a pipe bridge. In the open position, the passage opening is aligned 15 with the fluid passage 28 of the draft tube 11 and releases the coking drum. The diameter of the passage opening 15 or the pipe bridge is dimensioned so that the upper sealing seat 13a as well as the lower sealing seat described in detail elsewhere 13b the passage opening 15 caulk so that prevents gas and liquids from entering the interior of the valve body 10 reach. The receiving opening 16 and the through hole 15 are arranged side by side so that these by a translational movement of the support plate 14 each in the guide tube 11 be retracted to realize the open position and closed position of Einplattenschiebers.

The carrier plate 14 is between two guide plates 17 arranged, which is the carrier plate 14 encapsulate. The two guide plates 17 and the carrier plate 14 are arranged plane-parallel. For the actuation of the carrier plate 14 and thus in the carrier plate 14 arranged slide plate 12 is an operating rod 34 provided, the form-fitting with one end of the carrier plate 14 is connected, so that pushing and pulling forces on the carrier plate 14 can be transmitted. The operating rod 34 protrudes from one of the two hoods 27 and can be connected to a drive, not shown. The operating rod 34 is between the two guide plates 17 arranged in parallel spaced from each other.

In 3 It can be further seen that the upper pipe socket 18 completely from the valve body 10 is removable. This means that the upper part of the draft tube 11 including the upper sealing seat 13a Removable, creating a maintenance opening in the valve body 10 which is large enough to remove the slide plate 12 to enable. This is the upper pipe socket 18 formed as a unit that can be handled in a uniform manner. The upper pipe socket 18 has a support ring 35 on, to the ring flange 29 is appropriate. The support ring 35 and the ring flange 29 are concentric. The inside of the support ring 35 as well as the upper end face of the support ring 35 are with hard armor 30 coated. At the bottom of the support ring 35 is the lower sealing seat 13a arranged concentrically to the support ring 35 or in general to the upper pipe socket 18 is arranged. The upper sealing seat 13a is with the support ring 35 screwed. Together, the upper sealing seat 13a and the remaining components of the upper pipe socket including the support ring 35 and the annular flange 29 a unit that can be handled in a uniform way, which is detachable from the valve body 10 is connected and as a unit from the sliding housing 10 can be removed.

In the installed state according to 2 it can be seen that the upper pipe socket 18 in a housing housing 36 of the valve body 10 is arranged. The housing receptacle 36 is also in 3 easy to recognize and in one piece with the valve body 10 educated. The housing receptacle 36 forms a retaining ring into which the upper pipe socket 18 is used, as in 2 to see. The housing receptacle 36 together with the remaining wall of the valve body 10 is in 2 drawn as a translucent component.

In the 2 and 3 It can also be seen that the guide tube 11 a lower pipe socket 19 which is below the slide plate 12 is bolted to the housing.

For removing the slide plate 12 For maintenance purposes, this has a central threaded hole 37 on, in the example, a hook can be used.

The slide plate 12 forms a circular disk. In this respect, the shape of the slide plate corresponds 12 the cross section of the guide tube 11 , The shape of the receiving opening 16 is correspondingly circular.

The sealing function of the single-plate gate valve according to 1 is determined by the 4 explained.

The upper sealing seat 13a has three sealing components, which lead to a triple-acting sealing system. Single-acting or multiple-acting sealing systems can be used. The upper sealing seat 13a is a static sealing seat. This is understood to mean a sealing seat which acts as a repository for the slide plate 12 serves, if this against the upper sealing seat 13a is subjected to a contact force. In other words, the upper sealing seat 13a do not dodge when the slide plate 12 is pressed against this. In contrast, a dynamic sealing seat is understood to mean a sealing seat that actively activates the required contact pressure on the slide plate 12 applies. In contrast to such known dynamic sealing seats is the upper sealing seat 13a static. The required contact pressure for the sealing effect is achieved by the axially movable slide plate 12 applied.

The upper sealing seat 13a has a radially inwardly arranged sealing and scraping edge 20 on, which is also referred to as a scraper. The radially inwardly arranged sealing and scraping edge 20 forms the inner edge of the upper pipe socket 18 attached to the slide plate 12 is applied. The sealing and scraping edge 20 forms a metal gasket with the slide plate 12 in plant stands. The further function of the sealing and scraping edge 20 consists of any impurities that are on the slide plate 12 stick on, scratch off. Another seal of the upper sealing seat 13a is through the metal gasket 21 formed radially outward - with respect to the sealing and scraping edge 20 is arranged. The metal seal 21 forms the outer circumference of the upper sealing seat 13a and is by a spring 38 against the slide plate 12 biased. Other arrangements or possibilities of biasing the metal seal 21 are possible. The upper sealing seat 13a also has a so-called compensator 39 on, concentric to the upper pipe socket 18 is arranged. The compensator is a corrugated tube that can be compared to a very strong spring. The compensator 39 is in an annular groove 40 arranged above the metal gasket 21 on the circumference of the upper pipe socket 18 circulates. The ring groove 40 is through a recording ring 41 limited to the bottom where the springs 38 for the radially outer metal seal 21 arranged. The recording ring 41 lies on the metal seal 21 at. It is also possible the recording ring 41 and the metal seal 21 to train in one piece.

The third sealing system of the upper sealing seat 13a is by a gas-in particular vapor barrier 22 formed with that already related to 1 described flushing and sealing gas connection 31 connected is. The vapor barrier 22 is through another annular groove 42 formed concentrically between the sealing and scraping edge 20 and the metal seal 21 runs.

For the upper sealing seat 13a There are other possibilities of implementation.

The lower sealing seat 13b is through a ring 24 formed, the upper end face with the slide plate 12 in attachment. The lower sealing seat 13b is described in detail elsewhere.

In 4 It can also be seen that the receiving opening 16 the carrier plate 14 forming a concentric downwardly flaring edge which serves to remove any contaminants present between the gate plate 12 and the receiving opening 16 get down to dissipate.

The slide plate 12 has in the receiving opening 16 radial clearance, on the one hand to compensate for thermal distortion and on the other hand, the axial movement of the slide plate 12 in relation to the carrier plate 14 safe to allow.

For the already mentioned contact force of the slide plate 12 against the static upper sealing seat 13a is a pressing device 26 provided under the slide plate 12 is arranged. In other words, the slide plate 12 between the pressing device 26 and the upper sealing seat 13a , which serves as a repository for the pressing device 26 serves, arranged.

The contact pressure of the pressing device 26 is made by several on the circumference of the slide plate 12 distributed power means arranged 23 causes.

Generally, in connection with the invention, concretely with the embodiment according to 4 discloses and claims that the force means 23 on the outside of the slide plate 12 are arranged. In other words, the means of power 23 approximately at the height of the outer edge of the slide plate 12 arranged. This ensures that the power means 23 or generally the pressing device 26 outside the fluid passage 28 are arranged. The fluid passage is in the Einplattenschieber according to 1 - 5 except for the slide plate 12 in the closed position free of installation.

The on the circumference of the slide plate 12 distributed power means arranged 23 serve to pressurize the slide plate with the contact force in each case in the direction of the longitudinal axis of the guide tube. In other words, the contact force acts perpendicular to the slide plate 12 ,

In the example according to 4 are the means of power 23 designed as an eccentric in the slide housing 10 are rotatably mounted. Several eccentrics are equidistant on the circumference of the slide plate 12 arranged distributed to a constant and uniform contact force on the slide plate 12 to reach. The eccentrics each have a cam 43 on that with a lever 44 connected is. The lever 44 is in the valve body 10 rotatably mounted and drives the cam 43 so that this from a rest position in which the slide plate 12 essentially force-free can be moved to a working position in which the slide plate 12 is subjected to the contact force. The cam 43 works with the ring 24 Together, the power transmission from the cam 43 on the slide plate 12 causes. In that sense, the ring has 24 a double function. On the one hand, the ring acts 24 as a power transmission means. On the other hand, the ring causes 24 the sealing function of the lower sealing seat 13b , On top of that, the ring 24 together with the pressing device 26 the Einplattenschieber blocked in the closed position, so that it is secured against unintentional opening. This blocking function is not possible with the conventional dynamic sealing seats, which are only designed to increase the sealing force.

For actuating the power means 23 or the eccentric is already related to 1 addressed actuating cylinder 32 provided with a twist ring 33 interacts. The twisting ring 33 takes the levers 44 the eccentric with and thereby drives the respective cam 43 at. This is the twist ring 33 rotatably mounted in the slide housing. The twisting ring 33 is concentric to the upper or lower pipe socket 18 . 19 arranged.

As in 4 to see, the ring overlaps 24 both the slide plate 12 To be able to apply these to the corresponding contact force, as well as the edge of the receiving opening 16 , Between the lower edge of the receiving opening 16 and the ring 24 a sufficient clearance is set to the axial movement of the ring 24 to allow in the longitudinal direction of the guide tube, through which the slide plate 12 is subjected to the contact force. In other words, it avoids the ring 24 through the carrier plate 14 is blocked.

In 5 is another detail view from the edge region of the slide plate 12 shown. This shows that the ring 24 permanently loaded with a spring force to achieve that the ring 24 at the slide plate 12 is present, even if the pressing device 26 is inactive. For this purpose, distributed on the circumference arranged several springs 25 , in particular cup spring packages 25 arranged from below the ring 24 against the slide plate 12 to press. The spring packages 25 are in an annular receiving groove 46 arranged, which are annular and concentric with the lower pipe socket 19 extends. The receiving groove 46 is above the twist ring 33 educated. Other springs than those in 5 shown disc springs are possible.

In the 6 and 7 is a further embodiment of the invention a Einplattenschiebers shown, which differs from the Einplattenschieber according to 1 through the further drive 47 different. In 6 it is good to see that the carrier plate 14 on the one hand the passage opening 15 and on the other hand the slide plate 12 as a separate component. The slide plate 12 is as circular disk formed in the closed position concentric with the guide tube 11 is arranged.

In 7 it can be seen that the disc springs 25 symmetrical on the circumference of the ring 24 are arranged distributed. The same applies to the means of power 23 , in the 7 are not shown. In 7 It can be further seen that the support ring 35 of the upper pipe socket 18 with the housing receptacle 36 the slide housing is screwed. The support ring 35 takes the upper sealing seat 13a on and is concentric with this.

In 8th is shown that the force 23 can be formed by lifting cylinder or lifting spindles, which on the slide housing 10 are formed. The lifting spindles or lifting cylinders enter the slide housing and are located on the ring 24 (Not shown), so that it can be acted upon by the contact pressure.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1379604 A1 [0001, 0006]

Claims (17)

Single-disk gate valve for chemical and petrochemical plants with a valve body ( 10 ), which has a lockable guide tube ( 11 ) and a slide plate ( 12 ), which is displaceable in an open position and in a closed position and vice versa, wherein the guide tube ( 11 ) a sealing seat ( 13a ), which extends along the circumference of the guide tube ( 11 ) and in operation at least in the closed position from above against the slide plate ( 12 ), characterized in that the slide plate ( 12 ) in a displaceable carrier plate ( 14 ) and relative to the carrier plate ( 14 ) in the direction of the longitudinal axis of the guide tube ( 11 ) is movable, wherein a pressing device ( 26 ) under the slide plate ( 12 ) is arranged to the slide plate ( 12 ) in the closed position against the upper sealing seat ( 13a ) to press. Einplattenschieber according to claim 1, characterized in that the slide plate ( 12 ) with radial play in the carrier plate ( 14 ) is arranged. Einplattenschieber according to claim 1 or 2, characterized in that the shape of the slide plate ( 12 ) to the cross section of the guide tube ( 11 ) and in particular forms a circular disk. Einplattenschieber according to any one of the preceding claims, characterized in that the carrier plate ( 14 ) a passage opening ( 15 ) and a receiving opening ( 16 ), wherein in the receiving opening ( 16 ) the slide plate ( 12 ) is arranged. Einplattenschieber according to claim 4, characterized in that the receiving opening ( 16 ) has a conically downwardly enlarging edge. Einplattenschieber according to any one of the preceding claims, characterized in that the carrier plate ( 14 ) between an upper and a lower guide plate ( 17 ) is arranged, each in the region of the guide tube ( 11 ) a passage opening ( 15 ), wherein the carrier plate ( 14 ) between the guide plates ( 17 ) is encapsulated. Einplattenschieber according to any one of the preceding claims, characterized in that the guide tube ( 11 ) an upper and lower pipe socket ( 18 . 19 ), wherein the upper pipe socket ( 18 ) together with the upper sealing seat ( 13a ) from the slide housing ( 10 ) is removable to form a maintenance opening through which the slide plate ( 12 ) out of the valve body ( 10 ) is removable. Einplattenschieber according to any one of the preceding claims, characterized in that the upper sealing seat ( 13a ) has an at least single-acting, static sealing system, which with an upper side of the slide plate ( 12 ) cooperates. Einplattenschieber according to any one of the preceding claims, in particular according to claim 8, characterized in that the upper sealing seat ( 13a ) at least one radially inwardly arranged sealing and scraping edge ( 20 at least one radially outwardly disposed metal gasket ( 21 ) and in between a gas-in particular vapor barrier ( 22 ) having. Single-sheet gate valve according to one of the preceding claims, characterized in that the pressing device ( 26 ) at least in sections along the outer circumference of the slide plate ( 12 ) is arranged. Single-sheet gate valve according to one of the preceding claims, characterized in that the pressing device ( 26 ) a ring ( 24 ), which in the closed position at the bottom of the slide plate ( 12 ) is applied and can be acted upon by a contact force in the direction of the longitudinal axis of the guide tube ( 11 ) acts. A pusher according to claim 11, characterized in that the ring ( 24 ) a lower sealing seat ( 13b ), in particular in the form of a further metal gasket forms, which against the underside of the slide plate ( 12 ) seals. Single-sheet gate valve according to one of the preceding claims, characterized in that the pressing device ( 26 ) several on the circumference of the slide plate ( 12 ) distributed force ( 23 ), which for applying the slide plate ( 12 ) with a contact force in each case one in the direction of the longitudinal axis of the guide tube ( 11 ) generate acting force. Einplattenschieber according to claim 13, characterized in that the force means ( 23 ) Eccentric in the slide housing ( 10 ) are rotatably mounted. Einplattenschieber according to claim 13, characterized in that the force means ( 23 ) Lifting cylinders and / or lifting spindles, which in recordings on the slide housing ( 10 ) are arranged. Einplattenschieber according to any one of the preceding claims, in particular according to one of claims 11 to 15, characterized in that the pressing device ( 26 ), in particular the Ring ( 24 ), against the slide plate ( 12 ) is biased. Einplattenschieber according to claim 16, characterized in that a plurality of spring assemblies ( 25 ), in particular disk spring packets on the circumference of the ring ( 24 ) are arranged around the ring ( 24 ) each with a in the direction of the longitudinal axis of the guide tube ( 11 ) apply acting spring force.

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