JPS63500955A - shutoff valve - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] shutoff valve (Technical field) This invention provides a rapid Regarding the shutoff valve that operates in Regarding shutoff valves of this type.

Until now, in case of an accident or major defect, a small amount of hydrocarbons could be removed from the starting point. A shutoff valve for installation in a pipeline that can prevent the return of It was difficult to provide. Maintenance of currently commonly used valve elements and Replacement involves considerable expense due to the extensive requirements for such operation.

- Commonly used in pipelines, such as stat pipes, as recognized by way of example. If a normal shut-off valve is used, the line should be 1 Filled with water. Afterwards, the pipeline will be used again for gas/oil transport. First, it will take about 60 days to drain the water and dry it further. Ru. This involves a loss of production during this period, which has important economic consequences.

, 6 When cleaning pipe lines, when sending objects in the flow through the pipes and valves, approx. 200 tons of dirt 7 particles pass through the pipes and valves. Make sure this object doesn't stick to it. To ensure this, the tube must be continuous without cavities and edges. dirt 7 Particles and heavy hydrocarbons adhere to K when they enter, causing corrosion and viscosity. It is also desirable to protect the moving parts of the valve from ingress of these substances. Delicious. Therefore, a shut-off valve allows objects/liquids/gases to pass through a continuous “pipe” through the valve. Designed to guide you. The object is passed through the tube to clean it. It may be a so-called "big" item that is sent as a It is a recording/measuring device suitable for measuring the condition inside a pipe. It could also be "Linalog."

From French Patent No. 1594134, a type of shut-off valve with a shut-off lock is disclosed. This is a cylindrical piston that can move between two positions in the longitudinal direction of the passage. t, in which when the cylindrical piston is in the forward position, it Separate adjacent chambers with racks attached to the chamber walls. The valve according to the French patent is specially used in the atomic driven crab industry.

From U.S. Pat. No. 4,190,074, a pressure-equalizing wing valve is known, the valve valve of which The housing has a cover member into which the wing member can pivot. In the said deployment, Maintenance of the vane member is accomplished through the opening in the valve housing when the member is removed. can.

(Disclosure of invention) The object according to the invention is that the fluid (water/liquid) surrounding the valve is At the same time, the valve backing surface, the backing, the valve To reach and carry out maintenance, repair and/or modification of elements such as shafts, shut-off devices, etc. When the fluid (liquid/gas) flows past, it is pressed so that it does not flow in or out of the surrounding medium. This can enclose the valve or insert the valve into a housing, chamber, etc. such as can be achieved without the need to construct or cover the valve in any other way. It is possible to provide a cut valve.

Even if the valve is open when the valve is in the open position and the sheathing is removed, Valve maintenance can be performed without releasing the flowing liquid/gas into the surrounding medium. Elements such as , seals, seats, closing devices, etc. can be replaced. One surrounding medium at the same time ( Liquids/water) are prevented from entering the tubing. In operation, the back Rings, seats and similar elements are designed to prevent gas/oil/liquid flow and traps, dirt particles, etc. Protected from damage caused by contamination by children.

According to the invention, this is constructed and arranged according to the characterizing part of claim 1. obtained by a closed-off valve.

An advantageous embodiment representing a further development of the invention according to claim 1 is a further development of the invention according to claim 1. Disclosed in each section below Section 2.

(Brief explanation of the drawing) An example of an embodiment according to the invention is illustrated in the accompanying drawings.

Figure 1 shows the valve in the closed position and the elements shown on the side (corresponding to section 1-1 in Figure 2). 1 is a sectional view through the axis of a shut-off valve according to the invention; FIG.

2 is a top view of the valve according to FIG. 1 without the removable lid; FIG.

(Foremost form for carrying out the invention) The shut-off valve illustrated in the drawing is designed to prevent the surrounding medium from entering the pipeline. and that there is no risk of the fluid flowing past leaking when the valve is disassembled and inspected. A sub-surface/sub-liquid location, preferably for liquids/gases, e.g. No (intended for use in Eveline).

The valve has a cubic housing, which is oriented in the liquid/gas flow direction FKG. with a cylindrical valve N12.13 and a removable lid 9, intended to be It consists of a radially arranged valve chamber 14 formed by an upwardly directed transverse connecting pipe. valve It also has a Hamura valve body 3, which works in close cooperation with a seat 4 in the valve housing. between a dynamically closed position and an inoperative position that opens the valve to allow liquid/gas to flow through in direction F can be moved.

The Hamura valve body 3 passively acts under the influence of gravity and/or the flow medium. Can be moved or actuated by remote control by Hamura valve body 3Fi, actuating device can. Preferably, the Hamura valve body 3 is actuated by a hydraulic cylinder 15, which is preferably located below the bonnet 9.

The cylindrical valve chamber 1 has mutually different diameters in the circular and outward directions, and extends so as to have mutually different diameters. formed by two elements 1'X1'', arranged in the flow direction F. The valve chamber 12 located at the rear has the smallest internal diameter and, together with the coaxial inner tube section 11, forming a cylindrical steering member for the cylindrical piston 7; is inserted into the cylindrical valve chamber 12.13 of the valve housing between forward and retracted positions. Can be displaced in the @ line direction. In the forward position, the cylindrical piston 7 is located at the end of the end piece 19. in contact with the surface, in which the sleeve device 7 extends into the radial valve chamber 1 of the valve housing. In this way, 14 valve chambers and cylindrical valve chambers 12 and 13 are formed. Thus, replacement of the valve element brings the surrounding medium into contact with the flowing fluid. It can be achieved without forcing. In the retracted position, the cylindrical piston 7 radially from the area of the valve chamber 14.

The cylindrical piston 7 is radially oriented with an outer diameter that approximately corresponds to the inner diameter of the valve chamber portion 13. It is formed with a collar 7' projecting into the two outer positions. is fed through opening 8 or 8' to cause displacement of sleeve 7 between A reaction surface is formed for the medium under pressure or vacuum.

In order to establish the position of the cylindrical piston 7 in the forward position, the valve also has a suitable locking device. have Preferably, such a device has a hydraulic cylinder 16 which is rotated at 18. connected by a member to a crank 17 rotatably attached to the bonnet 9; It is suitable for moving the yoke 20 between an upper position and a lower position. In this upper position , the cylindrical piston 7 can move without obstruction, and in the lower position the yoke 20 cooperates with the groove 21 of the cylindrical piston 7 in order to lock it in its forward position. Ru. This occurs when the yoke 20 is extended to the lower position. The bonnet can be attached to the yoke 20 without retracting it from the groove 21. The connection between the crank 17 and the yoke so that it can be lifted freely with the attached equipment This is achieved by designing.

In a preferred embodiment of the valve according to the invention, the valve comprises a cylindrical piston 7 and a valve chamber 1. A special backing device (not shown) is provided to ensure a tight connection between the can be activated from the outside, for example hydraulically.

A device for applying hydraulic pressure to the actuator 15, 16 and a device for controlling the valve action. is desirably located in the chamber 24 located on the top side of the bonnet 90.

The bonnet 9 is usually held in place by a pivotable clamp 10. Ru.

The end piece 19 serves as a holding piece against displacement of the sleeve 7 in the flow direction F, and further allows the sleeve 7 to be installed through the opening that appears when the end piece is removed. Make it.

All elements can be made of copper with cladding.

To simplify the drawing, the backing ring and equipment and hydraulic connection lines are shown in the diagram. Omitted.

During normal operation, fluid flows in direction F. The cylindrical piston 7 is in the forward position However, if necessary, the Hamura valve body 3 is held in the upper position by the hydraulic actuator 15. . In export pipelines, such actuators 15 may be adopted as necessary. Although it is possible to select one, an actuator is definitely required in the import pipeline.

In an emergency operation, the liquid in the pipeline will not flow in an undesired direction. The wrapping medium, especially sea water, must be protected from ingress into the pipeline system. It is absolutely essential to do so. Depending on the signal from the platform, the cylindrical The piston 7 can be pushed back and the valve, by the influence of gravity, can be By the liquid returning in the nomi line or by the actuator A, the Hamura valve body 3 engages with the valve seat 4, the valve is closed. This position is indicated by the dotted line in Figure 1. Illustrated.

After the defect requiring valve closure has been corrected, the valve can be reopened. child This causes the pressure on both sides of the Hamura valve body 30 to rise into the valve chamber 14 in the radial direction. This is achieved by making it equal to . The valve is equipped with a hydraulic Hamurasho actuator 15. In this case, the Hamura valve body 3 can be moved appropriately by this device. yes If not, the three Hamura valve bodies will displace the cylindrical piston 7 to the forward position to prevent the intended movement. The movement can be achieved by appropriate design of Hamura valve body 3. Can be done.

In these circumstances, it would be desirable to have a shut-off valve that acts particularly quickly.

In this case, during one normal operation, the cylindrical piston is held in the retracted position. this is , which allows a particularly rapid shut-off of the valve by actuation of the Hamura valve body. Cylindrical piston 7 When trying to pass a big, or valve seal surface, shaft, Hamura valve body, etc. into the forward position only when necessary to carry out repair and maintenance work. Moved. In this mode of operation, many of the important elements of the valve The exposure to corrosion and erosion effects is obvious. However, this According to the means available to accomplish routine inspection of the valve according to the invention, this mode of operation Unknown adverse consequences that may occur can be kept to a low level or adequately prepared for. can be avoided altogether through a well-structured monitoring and maintenance schedule.

The unique features of the valve will be shown again.

When the cylindrical piston 7 is fixed in the forward position by the yoke 20, the attached The bonnet 9 with its elements can be removed without interrupting the operation of the pipeline. It can be removed. Prior to this operation, a backing device between the valve chamber 1 and the cylindrical piston 7 (not shown) should be activated and the pressure difference on both sides of the bonnet 9 should be equal. should be made clearer. Any of the different types of maintenance and repair work , then selected. In shallow water, after removing the bonnet, the diver should The work can be accomplished easily. Especially in deep water pressure, manned or unmanned submersibles can also Can be used. However, let us take full advantage of the special features of the valve according to this invention. In that case, the trigger of the device attached to the bonnet 9 and the hi-sole can be used instead. A lift can be used where inspections etc. can be carried out on board or very easily. If the bonnet 9 (with equipment) is replaced with a new or overhauled bonnet. Can be replaced.

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Claims (6)

[Claims] 1. A circle in which the valve is intended to be oriented along the liquid/gas flow direction (F) It closes with a cylindrical valve chamber (12, 13) and a removable bonnet (9). a valve housing containing a radially disposed valve chamber (14) that allows the valve to further the actuated closed position closely associated with the seat (4) in the valve housing and the liquid/gas a flap valve body (3) which can be moved between an inoperative position and an inoperative position which opens the valve to allow the flow of For use in submerged/subsurface locations, e.g. for liquids/gases In the cut-off valve in the underground pipeline, A winged valve body (3) is pivotally attached to the bonnet (9), and the valve is in the forward position. and the retracted position in the cylindrical chamber (12, 13) of the valve housing in the axial direction. It comprises a cylindrical piston (7) which is displaceable, in the forward position the cylindrical piston: It extends across the radial valve chamber (14) in the valve housing and in this way this separates the valve chamber from the cylindrical valve chamber (12, 13), thus preserving the valve element. Protection/exchange can be accomplished without contacting the surrounding medium with the flowing fluid, and the retraction characterized in that in the position, the cylindrical piston is retracted from the area of the radial valve chamber. A shutoff valve. 2. The cylindrical piston (7) has a radially projecting collar (7'), which , displaceable between said two positions by the influence of pressure or vacuum. The shutoff valve described in paragraph 1. 3. The valve is preferably an actuator mounted on the underside of the bonnet (9), preferably has a hydraulic actuator (15), which is connected to a hinge device (5) about the transverse axis. The valve body (3) according to claim 1 or 2, which is provided for the winged valve body (3) shutoff valve. 4. Claim in which the valve has a device for locking the cylindrical piston (7) in the forward position The shutoff valve according to item 1-3. 5. The locking device of the cylindrical piston (7) is connected to the crank (17) by a member. The crank (17) has a hydraulic cylinder (16) mounted on the bonnet (9). 18), and the yoke (20) is pivotably mounted between the upper and lower positions. In the upper position, the cylindrical piston (7) can move without obstruction. In the lower position, the yoke (20) locks the cylindrical piston (7) in the forward position. The yoke (20) is in the lower position. When extended, the yoke (20) is retracted from the groove (21) of the cylindrical piston (7). The ponnet carrying the installed equipment can be raised freely without The connection between the crank (17) and the yoke is designed as follows. The shutoff valve described in item 4. 6. Devices for providing hydraulic pressure for actuators (15, 16) and types of valves A device for controlling the action of the container is mounted on the top of the ponnet (9). 6. A device as claimed in claims 1-5, wherein the device is located within.