Single-plate slide

Abstract

Single-plate gate valve for chemical and petrochemical plants with a valve body (10) comprising a lockable guide tube (11) and a gate plate (12) which is displaceable into an open position and a closed position and vice versa, wherein the guide tube (11) is associated with a sealing seat (13a) which extends along the circumference of the guide tube (11) and, in operation, seals against the gate plate (12) from above, at least in the closed position, wherein the gate plate (12) is arranged in a displaceable support plate (14) and is movable relative to the support plate (14) in the direction of the longitudinal axis of the guide tube (11), wherein a pressing device (26) is arranged below the gate plate (12) to press the gate plate (12) against the upper sealing seat (13a) in the closed position, wherein the support plate (14) has a through-opening (15) and a receiving opening (16), wherein in the receiving opening (16) the slide plate (12) is arranged,wherein the sliding plate (12) is arranged with radial play in the support plate (14), characterized in that the receiving opening (16) has a conically widening downward edge.

Description

[0001] The invention relates to a single-plate slide valve with the features of the preamble of claim 1. Such a single-plate slide valve is known, for example, from EP 1 379 604 A1.

[0002] Single-plate slide gates of this type are used in the chemical and petrochemical industries, particularly in coking plants. These plants process residues from oil refineries. A preferred method is delayed coking, in which the residues are converted into petroleum coke (or petroleum coke), liquid, and gaseous hydrocarbons in a coking drum. Processing in the coking drum takes place at approximately 3 to 8 bar and a temperature of approximately 500°C. The petroleum coke is then hardened with steam and water and subsequently cut out of the coking drum by a water jet.

[0003] During the reaction, the coking drum is closed. It is opened to cut out the petroleum coke. Opening the drum is dangerous because very hot and flammable gases can escape. Therefore, opening the coking drum, known as de-heading, is automated. This is achieved using slide gates connected to a corresponding opening in the drum, which close and open it as needed.

[0004] Due to the high process temperatures and pressures, the valves must be properly sealed. Furthermore, the valves should be easy to operate to ensure trouble-free operation.

[0005] A distinction is made between so-called double-plate and single-plate valves. Double-plate valves have two parallel, spaced-apart valve plates that are spread apart by a wedge mechanism. In the closed position, this generates a high sealing force, ensuring the safe and reliable operation of the double-plate valve. Single-plate valves have a simpler design and a lower profile. They feature pre-tensioned sealing systems that generate the required sealing force.

[0006] Such a single-plate slide valve is known, for example, from the aforementioned EP 1 379 604 A1.

[0007] The known single-plate slide valve has a one-piece slide plate with a pipe bridge at its distal end. In the open position, this bridge provides access to the coking drum. The slide valve body includes a guide tube, which is screwed to the coking drum during operation. 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 portion of the one-piece slide plate. Sealing in the closed position is achieved by a combination of a dynamic and a static sealing surface. The dynamic sealing surface is created by several pistons distributed around the circumference of the guide tube. These pistons press a wedge against a corresponding wedge surface of a sealing ring. An axial movement of the piston moves the sealing ring downwards, pressing it against the slide plate.The piston is elastically pre-tensioned so that it can compensate for thermal expansion. The dynamic sealing system transfers the sealing force to the slide plate via the sealing ring.

[0008] The known system is relatively complex and can only generate limited sealing forces. Therefore, the manufacturing and maintenance costs of the known single-plate gate valve are comparatively high. Furthermore, the safety of the known single-plate gate valve is not sufficiently high.

[0009] The invention aims to improve a single-plate slide valve of the type mentioned above with regard to operational reliability.

[0010] According to the invention, this problem is solved by a single-plate slide with the features of claim 1.

[0011] A key aspect of the invention is to provide a single-plate gate valve for chemical and petrochemical plants, comprising a valve body. The valve body has a lockable guide tube and a gate plate that is movable between an open and a closed position. A sealing seat is associated with the guide tube, extending along its circumference and sealing against the gate plate from above, at least in the closed position, during operation. The gate plate is mounted in a movable support plate. The gate plate is movable relative to the support plate in the direction of the longitudinal axis of the guide tube. A pressure device is arranged below the gate plate to press it against the upper sealing seat in the closed position.

[0012] The invention has several advantages.

[0013] The invention allows for the generation of higher sealing forces. For this purpose, the pressure device is arranged below the slide plate, where more installation space is available, enabling the individual components of the pressure device to be made correspondingly larger. A fundamental difference from 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, the slide plate is arranged in the carrier plate and is movable relative to it in the direction of the longitudinal axis of the guide tube. The carrier plate and the slide plate thus form two independent components that are movable relative to each other.In contrast, in the prior art the slide plate is designed as a single piece, so that it cannot be pressed against the sealing seat as a whole, since the single-piece slide plate is guided longitudinally movable as a whole in the slide housing.

[0014] Furthermore, the contact function of the single-plate slide according to the invention can be used to lock the slide plate in the closed position, thus reliably preventing unintentional movement of the slide plate. This is not possible with a conventional dynamic sealing seat.

[0015] The sliding plate, which is movable relative to the carrier plate, has the further advantage that it can be removed from the carrier plate and easily replaced for maintenance. The carrier plate remains in the housing.

[0016] The functional separation of the slide plate and the support plate has the further advantage that the slide plate and the support plate are decoupled, so that the thermal distortion of the slide plate does not affect the support plate and thus the guidance in the slide housing, or at least only to a small extent.

[0017] The separate slide plate offers the further advantage that different materials can be used for the slide plate and the support plate. The material quality of the slide plate can therefore be adapted to the specific requirements placed on it as a shut-off device for the coking drum. The same applies to the surface finishing, which can be limited to the slide plate. This reduces manufacturing costs.

[0018] Preferred embodiments of the invention are specified in the dependent claims.

[0019] The sliding plate can thus be arranged with radial play in the support plate. This effectively prevents thermal expansion from the sliding plate being transferred to the support plate. Furthermore, the radial play facilitates the insertion of the sliding plate into the support plate during assembly or maintenance work.

[0020] Preferably, the shape of the slide plate is adapted to the cross-section of the guide tube. The guide tube typically has a circular cross-section. In this case, the slide plate is designed as a circular disk. The circular disk has the advantage that thermal distortion occurs radially. With non-circular slide plates, as in the prior art, thermal distortion generally occurs uncontrolled, which can lead to problems with sealing and guidance of the slide plate.

[0021] In a preferred embodiment, the support plate has a through-opening and a receiving opening, with the sliding plate arranged in the receiving opening. In the open position, the through-opening is aligned with the guide tube. The through-opening can also be referred to as a pipe bridge. In the closed position, the sliding plate arranged in the receiving opening blocks the guide tube.

[0022] The receiving opening can have a downwardly tapered rim. This ensures that any contaminants that get between the edge of the slide plate and the edge of the receiving opening can be drained downwards.

[0023] The directions "top" and "bottom" refer to the installation position of the slide valve. In this position, the longitudinal axis of the guide tube is vertically aligned. The support plate with the slide valve plate is moved horizontally, i.e., perpendicular to the longitudinal axis of the guide tube. The shut-off device is located below the slide valve plate in this position. Therefore, in the closed position, the slide valve plate is positioned between the shut-off device and the coking drum.

[0024] In another preferred embodiment, the carrier plate is arranged between an upper and a lower guide plate, each of which has a through-opening in the area of ​​the guide tube, with the carrier plate being encapsulated between the guide plates. The two guide plates provide linear guidance for the carrier plate. Furthermore, the guide plates seal the carrier plate and thus the slide plate, preventing gases or liquids from entering the slide housing in either the open or closed position. The seal of the slide housing can be further improved by pressurizing it.

[0025] The guide tube can form an upper and a lower pipe stub. The upper pipe stub, together with the upper sealing seat, can be removed from the valve body to create a maintenance opening through which the valve plate can be removed from the valve body. This maintenance opening enlarges the existing opening in the valve body near the guide tube, allowing the valve plate to be removed through it. This eliminates the need to remove the valve plate longitudinally from the housing, a much more laborious process. Replacing the valve plate now only requires removing the guide tube along with the upper sealing seat, allowing the valve plate to be removed from the housing from above.

[0026] The upper sealing seat features at least a single-acting, static sealing system that interacts with the top of the slide plate. Unlike prior art, it is therefore not necessary to provide a dynamically acting sealing system to generate the required sealing force. Instead, a comparatively simple sealing system can be used against which the slide plate as a whole is pressed. It is also possible to employ a double-acting, triple-acting, or quadruple-acting static sealing system to improve the sealing function. In a double-acting sealing system, two separate sealing materials are combined. In a triple-acting sealing system, three separate sealing materials are combined, and so on.

[0027] In a particularly preferred embodiment, a sealing seat with a triple-acting sealing system can have at least one radially inner sealing and scraping edge, at least one radially outer metal seal, and a gas, and in particular vapor, barrier between them. The radially inner sealing and scraping edge, also referred to as a scraper, forms a metal seal that seals against the surface of the slide plate. This edge also scrapes away contaminants that are baked onto the surface of the slide plate. The radially outer seal is also a metal seal that seals against the surface of the slide plate. The gas barrier arranged between them effectively prevents the ingress of gases and liquids into the interior of the slide housing.

[0028] Preferably, the pressure device is arranged at least partially along the outer circumference of the slide plate. This ensures that the through-opening formed by the guide tube is free of obstructions, allowing the petroleum coke or other residues from the coking drum to be discharged unhindered through the guide tube to the outside. The arrangement of the pressure device along the outer circumference of the slide plate thus means that the pressure device does not protrude beyond the inner diameter of the guide tube.

[0029] Preferably, the clamping device has a ring that, in the closed position, rests against the underside of the slide plate and can be subjected to a clamping force acting in the direction of the longitudinal axis of the guide tube. This ensures that a uniform clamping force is transmitted from the clamping device to the slide plate, resulting in a correspondingly uniform sealing effect across the entire circumference of the slide plate. The clamping force acting in the direction of the longitudinal axis of the guide tube thus acts vertically, i.e., perpendicular to the slide plate, in the installed position.

[0030] Preferably, the ring forms a lower sealing seat, particularly in the form of a further metal seal that seals against the underside of the slide plate. The ring thus has a dual function: on the one hand, it transmits the sealing force from the pressure device to the slide plate, and on the other hand, it forms a seal that prevents contaminants from entering the slide housing.

[0031] In a particularly preferred embodiment, the pressing device has several force means arranged distributed around the circumference of the slide plate, each generating a force acting in the direction of the longitudinal axis of the guide tube to apply a pressing force to the slide plate. This ensures that the pressing force is introduced into the slide plate at several points around its circumference, so that it is pressed evenly against the upper sealing seat.

[0032] The force-actuating elements can include eccentrics that are rotatably mounted in the slide housing. A rotational movement of the eccentrics presses them against the slide plate, specifically against the ring, which then presses against the slide plate. This generates the clamping force in a simple mechanical way.

[0033] Alternatively, the power means can include lifting cylinders and / or lifting spindles arranged in receptacles on the valve body.

[0034] The clamping device, in particular the ring, can be pre-tensioned against the slide plate. This ensures that the ring presses against the slide plate with a continuous force, so that the sealing function, especially of the ring, is maintained even when the clamping device is not actively operating.

[0035] Preferably, several spring assemblies, in particular disc spring assemblies, are arranged distributed around the circumference of the ring, each exerting a spring force on the ring in the direction of the longitudinal axis of the guide tube. This generates the sealing force of the lower sealing seat, even when the pressure device is at rest.

[0036] The invention is explained in more detail below with reference to the accompanying schematic drawings and exemplary embodiments. These show

[0037] Fig. 1: A perspective view of a single-plate slide according to an embodiment of the invention;

[0038] Fig. 2: a longitudinal section of the single-plate slide according to Fig. 1;

[0039] Fig. 3: an exploded view of the single-plate slide according to Fig. 1;

[0040] Fig. 4: a detailed view of the single-plate slide according to Fig. 1 in the edge area of ​​the sliding plate;

[0041] Fig. 5: another detailed view of the single-plate slide according to Fig. 1 in the edge area of ​​the sliding plate;

[0042] Fig. 6: a perspective partially cutaway view of a single-plate slide according to a further embodiment;

[0043] Fig. 7: a cross-sectional cut of the single-plate slide according to Fig. 6 in the closed position; and

[0044] Fig. 8: A side view of a single-plate slide according to a further embodiment.

[0045] The single-plate slide according to Fig. 1 is used in coking plants, especially in delayed coker plants, where coking drums are equipped with shut-off devices. Specifically, the in Fig. The single-plate slide valve shown in Figure 1 is used for closing the lower outlet opening of a coking drum (bottom de-heading). It is also possible to use the concept according to the invention, which is incorporated into the single-plate slide valve shown in Figure 1, for the purpose of closing the lower outlet opening of a coking drum (bottom de-heading). Fig. 1 is implemented in a shut-off device used to open and close the top discharge opening of the coking drum (top de-heading). Furthermore, the concept according to the invention, or more generally the invention, can be used in connection with shut-off devices employed in other industrial sectors such as ethylene, FCCU, phosgene, etc. In general, the single-plate slide valve according to the embodiment of the invention, or more generally the invention, can be used as a shut-off device in chemical and petrochemical plants.

[0046] The in Fig. The single-plate slide valve shown has a slide valve housing. 10 open. The slider housing 10 is between two hoods27 arranged in the longitudinal direction of the valve body 10 extend. The two hoods 27 and the slider housing 10 are screwed together. The two hoods 27 enclose the displacement paths of the internal components arranged in the valve body, which are required to actuate the single-plate valve. The valve body 10 a guide tube 11 on, which a fluid passage 28 forms. The fluid passage 28 In its assembled state, it aligns with the outlet opening of the coking drum (not shown). Through the fluid passage 28 The petroleum coke components in the coking drum are removed, for example by waterjet cutting. The guide tube 11 shows one in Fig. 1 upper pipe stub shown 18 , which is connected to the slider housing 10 It is screwed on. The guide tube 11, specifically the upper pipe stub 18 is an upper sealing seat 13a assigned to the one in Fig. 2 can be seen. The upper pipe stub. 18 features a ring flange 29 on, which is connected to the slider housing 10 It is screwed together.

[0047] In Fig. 1. It can also be seen that the inner diameter of the guide tube 11 a hard armor 30 features the guide tube 11 protects against abrasive wear.

[0048] The guide tube 11 extends along a Fig. 1. Longitudinal axis shown. In the installed state, the longitudinal axis runs in a vertical direction. The longitudinal axis of the guide tube is aligned with the longitudinal axis of the coking drum (not shown).

[0049] In Fig. 1. It can also be seen that the valve housing has a purging or sealing gas connection. 31It features a purge and sealing gas connection located at the upper edge of the valve body. This connection supplies the sealing seat. 13a with purging or sealing gas. Specifically, in the case of the single-plate valve according to Fig. 1. Steam used as a barrier gas.

[0050] On the lower longitudinal edge of the slide housing 10 is a pressure device 26 specifically, a control cylinder is planned. 32 , which has a twisting ring 33 is connected. The actuator cylinder 32 and the twist ring 33 form parts of the pressure device described in more detail elsewhere 26 . In the case of the single-plate slide according to Fig. 1. A single actuator cylinder is sufficient. 32 However, multiple actuator cylinders can also be provided, for example on opposite sides of the valve body. At least one additional actuator cylinder is required. 32 It may be provided that the rotating ring is operated in the opposite direction. 33attacks, so that a torsional torque is exerted by the first actuating cylinder 32 is intensified.

[0051] On the two hoods 27 Are there any other gas connections? 45 provided, which serve to apply a sealing pressure to the two hoods or the slide housing.

[0052] From the in Fig. 1 right hood 27 An actuating rod protrudes longitudinally, which is used to move the single-plate slide valve into the open or closed position. The actuating rod is connected to a suitable drive mechanism during operation.

[0053] In the Fig. 2 and Fig. 3 is the construction of the single-plate slide valve according to Fig. 1. In the slide housing 10 is a sliding plate 12 arranged so that it can be moved into an open position and a closed position and vice versa. In the open position, the sliding plate 12 the guide tube 11free, so that the coking drum flanged to the guide tube becomes accessible. In the closed position, the slide plate blocks it. 12 The guide tube prevents the gases, liquids, and solids in the coking drum from being retained. The seal of the slide plate 12 This is achieved through an upper sealing seat 13a .

[0054] The position designations "top" and "bottom" refer to the operating state of the single-plate slide valve, which is arranged horizontally. As in the Fig. 2, Fig. 3 in connection with Fig. 1. To be recognized, the sealing seat extends 13a along the circumference of the guide tube 11 , specifically along the circumference of the upper pipe stub.

[0055] A special feature of the single-plate slide according to Fig. 1- Fig. 3 consists of the fact that the sliding plate 12 in a movable support plate 14is arranged. The sliding plate 12 and the carrier plate 14 These are two separate components with different functions. The sliding plate 12 Its sole purpose is to close the guide tube. 11 The carrier plate 14 holds the sliding plate 12 and moves them into the open position or the closed position and vice versa. The carrier plate has this feature. 14 a receiving opening 16 on, in which the sliding plate 12 is arranged (see Fig. 2, Fig. 3) The intake opening 16 is dimensioned so that the sliding plate 12 relative to the support plate 14 in the direction of the longitudinal axis of the guide tube 11 is movable. In other words, the sliding plate can 12 They are moved perpendicular to their radial extent. For this to happen, a corresponding clearance is required between the sliding plate and the slide plate. 12 and the intake opening 16adjusted so that tilting of the two components due to thermal expansion of the slide plate is prevented. 12 and the carrier plate 14 This is prevented. Purpose of the axial mobility of the slide plate 12 It is the pressing down of the slide plate. 12 against the upper static sealing seat 13a to enable this. The contact force is achieved by the aforementioned contact device. 26 achieved, which is in the installed position under the slide plate 12 is arranged.

[0056] With the axially movable slide plate 12 and the pressure device 26 This ensures that the sliding plate is in the closed position. 12 these against the upper sealing seat 13a can be pressed so that the sealing force between the upper sealing seat 13a and the sliding plate 12 is increased.

[0057] The support plate 14in addition to the intake opening 16 a passageway 15 which can also be described as a pipe bridge. In the open position, the opening is flush. 15 with the fluid passage 28 of the guide tube 11 and releases the coking drum. The diameter of the through-hole 15 or the pipe bridge is dimensioned so that the upper sealing seat 13a as well as the lower sealing seat described in more detail elsewhere 13b the passageway 15 seal it so that gas and liquids cannot enter the interior of the valve body. 10 to reach the intake opening 16 and the passageway 15 are arranged side by side in such a way that they are affected by a translational movement of the support plate 14 each into the guide tube 11 They must be inserted to achieve the open and closed positions of the single-plate slide valve.

[0058] The support plate 14 is between two guide plates 17 arranged, which the carrier plate 14 encapsulate. The two guide plates 17 and the carrier plate 14 are arranged parallel to each other. For actuating the carrier plate 14 and thus the one in the carrier plate 14 arranged sliding plate 12 is an actuating rod 34 provided for, which are form-fitting to one end of the carrier plate 14 is connected so that shear and tensile forces are transferred to the support plate 14 can be transferred. The actuating rod 34 protrudes from one of the two hoods 27 protrudes and can be connected to a drive unit (not shown). The actuating rod 34 is between the two guide plates 17 arranged parallel to each other.

[0059] In Fig. 3. It can further be seen that the upper pipe stub 18 completely from the slider housing 10 is removable. This means that the upper part of the guide tube can be removed. 11 including the upper sealing seat 13a removable, creating a maintenance opening in the valve housing 10 is formed, which is large enough to allow removal of the sliding plate. 12 to enable this. For this purpose, the upper pipe stub 18 designed as a single, easily handled unit. The upper pipe fitting 18 features a support ring 35 on, to which the ring flange 29 is attached. The support ring 35 and the ring flange 29 are concentric. The inside of the support ring 35 as well as the upper front face of the support ring 35 are equipped with hard armor 30 coated. On the underside of the support ring 35 is the lower sealing seat 13aarranged concentrically to the support ring 35 or generally to the upper pipe stub 18 is arranged. The upper sealing seat 13a is with the support ring 35 screwed together. Together they form the upper sealing seat. 13a and the remaining components of the upper pipe support, including the support ring 35 and the ring flange 29 a uniformly manageable unit that can be detached from the slide housing 10 is connected and as a unit from the sliding housing 10 can be removed.

[0060] In the installed state according to Fig. 2 can be seen that the upper pipe stub 18 in a housing 36 of the valve body 10 is arranged. The housing mount 36 is also in Fig. 3 clearly visible and integrated with the slider housing 10 trained. The housing mount 36forms a retaining ring into which the upper pipe stub 18 is used, as in Fig. 2 can be seen. The housing image 36 together with the rest of the wall of the valve housing 10 is in Fig. 2 is shown as a translucent component.

[0061] In the Fig. 2 and Fig. 3 can also be seen that the guide tube 11 a lower pipe stub 19 has below the sliding plate 12 is screwed to the housing.

[0062] For removing the sliding plate 12 For maintenance purposes, this has a central threaded hole. 37 on, into which, for example, a hook can be inserted.

[0063] The sliding plate 12 It forms a circular disc. Therefore, its shape corresponds to that of a sliding plate. 12 the cross-section of the guide tube 11 The shape of the intake opening 16It is therefore perfectly circular.

[0064] The sealing function of the single-plate slide according to Fig. 1 is based on the Fig. 4 explained.

[0065] The upper sealing seat 13a It features three sealing components that result in a triple-acting sealing system. Single-acting or multi-acting sealing systems can be used. The upper sealing seat 13a This is a static sealing seat. This refers to a sealing seat that serves as a support for the valve plate. 12 serves when these are opposite to the upper sealing seat 13a is subjected to a contact force. In other words, the upper sealing seat can 13a do not swerve when the sliding plate 12 against which it is pressed. In contrast, a dynamic sealing seat is understood to be a sealing seat that actively applies the required contact force to the slide plate. 12applies. Unlike such known dynamic sealing seats, the upper sealing seat 13a Static. The required contact force for the sealing effect is provided by the axially movable slide plate. 12 upset.

[0066] The upper sealing seat 13a features a radially internally arranged sealing and scraping edge 20 on, which is also called a scraper. The radially arranged inner sealing and scraping edge 20 forms the inner edge of the upper pipe stub 18 , which are attached to the slide plate 12 is located. The sealing and scraping edge 20 forms a metal seal that connects with the slide plate 12 The attachment states: The further function of the sealing and scraping edge 20 consists of removing any impurities that may be present on the slide plate. 12 to stick, to scrape off. Another seal of the upper sealing seat. 13a is through the metal seal 21formed, radially outwards – in relation 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 through a spring 38 against the sliding plate 12 Pre-tensioned. Other arrangements or possibilities for pre-tensioning the metal seal. 21 are possible. The upper sealing seat 13a It also features a so-called compensator. 39 up, which is concentric to the upper pipe stub 18 is arranged. The compensator is a corrugated tube that can be compared to a very strong spring. The compensator 39 is in a ring groove 40 arranged above the metal seal 21 on the circumference of the upper pipe stub 18 surrounds the ring groove 40 is through a receiving ring 41 limited at the bottom, in which the springs 38 for the radially outer metal seal21 arranged. The receiving ring 41 It's due to the metal seal. 21 on. It is also possible to use the receiving ring. 41 and the metal seal 21 to form a single unit.

[0067] The third sealing system of the upper sealing seat 13a is protected by a gas, especially vapor, barrier 22 formed, which are already related to Fig. 1 described purging and sealing gas connection 31 is connected. The vapor barrier 22 is through another ring groove 42 formed concentrically between the sealing and scraping edges 20 and the metal seal 21 proceeds.

[0068] For the upper sealing seat 13a There are other implementation options as well.

[0069] The lower sealing seat 13b is through a ring 24 formed, the upper end face of which is connected to the sliding plate 12is attached. The lower sealing seat 13b will be described in more detail elsewhere.

[0070] In Fig. 4 can also be seen that the intake opening 16 the carrier plate 14 forms a concentrically downward-widening rim, which serves to prevent any impurities that may get between the sliding plate. 12 and the intake opening 16 to get down.

[0071] The sliding plate 12 has in the intake opening 16 radial play to compensate for thermal distortion on the one hand and axial movement of the slide plate on the other. 12 in relation to the carrier plate 14 to enable safely.

[0072] Regarding the previously mentioned contact force of the slide plate 12 against the static upper sealing seat 13a is a pressure device 26 provided, which are located under the sliding plate12 is arranged. In other words, the sliding plate 12 between the pressure device 26 and the upper sealing seat 13a , which serves as a support for the pressure device 26 serves, arranged.

[0073] The contact force of the contact device 26 is formed by several on the circumference of the slide plate 12 Distributed power sources 23 causes.

[0074] In general, in connection with the invention, specifically with the embodiment according to Fig. 4 discloses and claims that the power means 23 on the outside of the sliding plate 12 are arranged. In other words, the means of power are 23 approximately at the height of the outer edge of the sliding plate 12 arranged. This ensures that the power means are reliably supplied. 23 or, more generally, the clamping device 26 outside the fluid passage28 are arranged. The fluid passage in the single-plate valve is according to Fig. 1– Fig. 5 except for the sliding plate 12 No installation required in the closed position.

[0075] The area on the circumference of the slide plate 12 distributedly arranged power sources 23 These serve to apply the clamping force to the slide plate in the direction of the longitudinal axis of the guide tube. In other words, the clamping force acts perpendicular to the slide plate. 12 .

[0076] In the example according to Fig. 4 are the means of power 23 designed as an eccentric, which is located in the slide housing 10 They are mounted on rotatable bearings. Several eccentrics are equidistant around the circumference of the slide plate. 12 distributed to ensure the most constant and even contact force possible on the slide plate 12 to achieve this. The eccentrics each have a cam. 43on, which is equipped with an adjusting lever 44 is connected. The adjusting lever 44 is in the slide housing 10 It is rotatably mounted and drives the cam. 43 on, so that it is from a rest position in which the slide plate 12 is essentially force-free and can be moved into a working position in which the slide plate 12 is subjected to the contact force. The cam 43 works with the ring 24 together, which transmits power from the cam 43 onto the sliding plate 12 caused. In that sense, the ring 24 a dual function. On the one hand, the ring functions 24 as a means of power transmission. On the other hand, the ring causes 24 the sealing function of the lower sealing seat 13b Furthermore, the ring 24 together with the pressure device 26The single-plate slide valve is blocked in the closed position, thus preventing it from opening unintentionally. This blocking function is not possible with conventional dynamic sealing seats, which are designed solely to increase sealing force.

[0077] To operate the power source 23 or the eccentric is the one already in connection with Fig. 1 addressed actuator cylinder 32 provided, which is equipped with a twisting ring 33 interacts. The twist ring 33 takes the adjusting levers 44 the eccentric and thereby drives the respective cam 43 on. The twist ring is for this purpose. 33 Rotatably mounted in the slide housing. The rotating ring 33 is concentric to the upper or lower pipe stub 18 , 19 arranged.

[0078] As in Fig. 4 can be seen, the ring overlaps. 24 both the sliding plate 12, in order to apply the appropriate pressure to them, as well as to the edge of the receiving opening 16 . Between the lower edge of the receiving opening 16 and the ring 24 Sufficient play is set to accommodate the axial movement of the ring. 24 to enable in the longitudinal direction of the guide tube, through which the slide plate 12 is subjected to the contact force. In other words, it prevents the ring from being damaged. 24 through the carrier plate 14 is blocked.

[0079] In Fig. 5 is another detailed view from the edge area of ​​the sliding plate. 12 shown. It is evident that the ring 24 is permanently subjected to a spring force in order to ensure that the ring 24 on the slide plate 12 is present, even if the pressure device 26 is inactive. Several springs are arranged around its circumference for this purpose.25 , especially disc spring assemblies 25 arranged from below the ring 24 against the sliding plate 12 press. The spring packs 25 are in a ring-shaped receiving groove 46 arranged in a ring shape and concentrically towards the lower pipe stub 19 extends. The recording 46 is above the twist ring 33 trained. Springs other than those in Fig. The 5 disc springs shown are possible.

[0080] In the Fig. 6 and Fig. Figure 7 shows a further embodiment of a single-plate slide according to the invention, which differs from the single-plate slide according to Fig. 1 through the further drive 47 differs. In Fig. 6 clearly shows that the carrier plate 14 on the one hand the passage opening 15 and on the other hand the sliding plate 12as a separate component. The sliding plate 12 is designed as a circular disc which, in the closed position, is concentric with the guide tube 11 is arranged.

[0081] In Fig. 7 shows that the disc springs 25 symmetrical around the circumference of the ring 24 are distributed and arranged. The same applies to the means of propulsion. 23 , which in Fig. 7 are not shown. Fig. 7 can further be seen that the support ring 35 of the upper pipe stub 18 with the housing mount 36 the valve body is screwed on. The support ring 35 takes the upper sealing seat 13a on and is concentrically formed with this.

[0082] In Fig. Figure 8 shows that the power means 23 can be formed by lifting cylinders or lifting spindles that are attached to the valve body 10are designed. The lifting spindles or lifting cylinders enter the valve housing and lie against the ring. 24 (not shown) so that it can be subjected to the pressing force. QUOTES INCLUDED IN THE DESCRIPTION

[0083] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0084] EP 1379604 A1 [0001, 0006]

Claims

[1] Single-plate valve for chemical and petrochemical plants with one valve body ( 10 ), which is a lockable guide tube ( 11 ) and a sliding plate ( 12 ) has a position which can be moved into an open position and into a closed position and vice versa, wherein the guide tube ( 11 ) a sealing seat ( 13a ) is assigned, which extends along the circumference of the guide tube ( 11 ) extends and, at least in the closed position, from above against the slide plate ( 12 ) seals, characterized by that the sliding plate ( 12 ) in a movable support plate ( 14 ) arranged and relative to the carrier plate ( 14 ) in the direction of the longitudinal axis of the guide tube ( 11 ) is movable, wherein a pressure device ( 26 ) under the sliding plate ( 12 ) is arranged to hold the slide plate ( 12 ) in the closed position against the upper sealing seat ( 13a) to press. [2] Single-plate slide according to claim 1, characterized by that the sliding plate ( 12 ) with radial play in the carrier plate ( 14 ) is arranged. [3] Single-plate slide according to claim 1 or 2, characterized by that the shape of the sliding plate ( 12 ) to the cross-section of the guide tube ( 11 ) is adapted and in particular forms a circular disc. [4] Single-plate slide according to any one of the preceding claims, characterized by that the carrier plate ( 14 ) a through opening ( 15 ) and a receiving opening ( 16 ) has, wherein in the receiving opening ( 16 ) the sliding plate ( 12 ) is arranged. [5] Single-plate slide according to claim 4, characterized by that the recording opening ( 16 ) has a conical rim that widens towards the bottom. [6] Single-plate slide according to any one of the preceding claims, characterized bythat the carrier plate ( 14 ) between an upper and a lower guide plate ( 17 ) is arranged, each in the area of ​​the guide tube ( 11 ) a through opening ( 15 ) exhibit the carrier plate ( 14 ) between the guide plates ( 17 ) is encapsulated. [7] Single-plate slide according to any one of the preceding claims, characterized by that the guide tube ( 11 ) an upper and lower pipe fitting ( 18 , 19 ) forms, with the upper pipe stub ( 18 ) together with the upper sealing seat ( 13a ) from the valve body ( 10 ) is removable to form a maintenance opening through which the slide plate ( 12 ) from the valve body ( 10 ) is removable. [8] Single-plate slide according to any one of the preceding claims, characterized by that the upper sealing seat ( 13a) has at least a simple, static sealing system connected to a top surface of the slide plate ( 12 ) works together. [9] Single-plate slide according to any of the preceding claims, in particular according to claim 8, characterized by that the upper sealing seat ( 13a ) at least one radially inside sealing and scraping edge ( 20 at least one radially outer metal seal ( 21 ) and in between a gas, especially vapor, barrier ( 22 ) exhibits. [10] Single-plate slide according to any one of the preceding claims, characterized by that the pressure device ( 26 ) at least sectionally along the outer circumference of the slide plate ( 12 ) is arranged. [11] Single-plate slide according to any one of the preceding claims, characterized by that the pressure device ( 26 ) a ring ( 24) which, in the closed position, is located on the underside of the slide plate ( 12 ) is in contact with and can be subjected to a contact force that acts in the direction of the longitudinal axis of the guide tube ( 11 ) works. [12] Single-plate slide according to claim 11, characterized by that the ring ( 24 ) a lower sealing seat ( 13b ), particularly in the form of another metal seal, which is against the underside of the slide plate ( 12 ) seals. [13] Single-plate slide according to any one of the preceding claims, characterized by that the pressure device ( 26 ) several on the circumference of the slide plate ( 12 ) distributed power means ( 23 ) has, which is used to actuate the slide plate ( 12 ) with a contact force, each in the direction of the longitudinal axis of the guide tube ( 11 ) generate an effective force. [14] Single-plate slide according to claim 13, characterized bythat the power resources ( 23 ) Eccentrics include those located in the slide housing ( 10 ) are rotatably mounted. [15] Single-plate slide according to claim 13, characterized by that the power resources ( 23 ) include lifting cylinders and / or lifting spindles that are mounted in receptacles on the valve body ( 10 are arranged. [16] Single-plate slide according to any of the preceding claims, in particular according to any of claims 11 to 15, characterized by that the pressure device ( 26 ), especially the ring ( 24 ), against the sliding plate ( 12 ) is pre-tensioned. [17] Single-plate slide according to claim 16, characterized by that several spring packs ( 25 ), in particular disc spring assemblies on the circumference of the ring ( 24 ) are arranged in a distributed manner, forming the ring ( 24 ) each with one in the direction of the longitudinal axis of the guide tube ( 11 ) acting spring force.

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