SU1560888A2 - Device for closing off a pipeline - Google Patents

Abstract

The purpose of the invention is to expand the functionality by providing an alarm to indicate the exact stop of the device in the pipeline. For this, the device is equipped with a percussion mechanism with a drive of percussion blades 29 from screw blades 24. When extending the rods 10, the blades 24 simultaneously move with the cam 25, which causes the movement of the supports 35 and their installation on the working surfaces of the cam 25. Fluid pumped through the pipeline 7 with the combined through holes of the bypass element causes the rotation of the screw blades 24 and, accordingly, the cam 25 acting on the hammer 29. The location of th device in line and tie-accurate location. 5 il.

Description

FIG. one

The invention relates to the field of pipeline transport of liquids and gases and is intended to shut off the existing pipeline in the production of tie-ins for various purposes.

The purpose of the invention is to increase the reliability of the device by providing an alarm signaling the exact location of its stopping in the pipeline.

FIG. 1 shows the device in the pipeline in the working position; in fig. 2 is a view A of FIG. one; in fig. 3 shows the node I in FIG. one; FIG. 4 is a view B of FIG. one; in fig. 5 shows a section B-B in FIG. four.

The device consists of a tubular body 2 provided with guides 1 with inflatable elastic sealers 3 enclosing it at the ends, the cavity of which is connected to a source 5 of a compressed ase (high pressure cylinder) 6 with a pressure regulator 6 through nozzles 4. installed outside the pipeline 7 by a command body (not shown) through the detector 8 (low-frequency receiving and transmitting device), which serves to receive a signal from an external command body on posing the device and transfer the executive team locking assembly.

The device's stop assembly is made in the form of an axially placed double cylinder deformation strut housing the axle, at the ends of the spring-loaded rods 10 of which are fixed articulated rods 11 connected to stop shoes 12. An overflow element is installed on one of the rods, consisting of provided through holes 13 of a fixed disk 14 and a rotary movable disk 15 having a protrusion in the form of a tooth 16 on the hub, which is inserted into a helical groove 17 made on the rod. The piston cavities of the cylinder 9 are provided with fittings with solenoid valves 18 connected to a source 5 of compressed gas through a gas distribution line consisting of an electropneumatic distributor 19, an electric current source 20, gas pipes 21 and an adjustable pneumatic throttle 22 located between the outer

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the housing 2 and the inner tubular housing 23.

The device is equipped with a mechanism for signaling its exact stop in the pipeline, which contains screw blades 24 installed rotatably at the end of one of the spring-loaded rods 10 with a cam 25 fixed to them and having a lead-in conical surface on the end of the outer tubular body 2. Screw blades 24 with a cam 25 mounted on bearings 26 and fixed with a washer 27 and screw 28. The mechanism of the detector includes strikers 29 with springs 30 placed in guides 31 on the outside m tubular housing 2 with the ability to interact with one side of the.). . the inner wall of the pipeline 7, on the other - with the cam 25.

Drummer 29 consists of striker 32, restrictive nut 33, compression spring 34, support 35, the stroke of which is limited by retaining ring 36.

The pipeline is blocked as follows.

The device is introduced into the pipeline 7 through the start-up chambers of the cleaning devices and is delivered to the place of shutdown in the flow of the transported medium. In this case, the rods 10 of the power cylinder 9 are pushed inside the cylinder, the locking shoes 12 are retracted from the walls of the pipeline, the through holes 13 of the disks 14 and 15 are not aligned in the open position, the elastic seals 3 do not contact with the pipe | wire, and electropneumatic distributors 19 block access of compressed gas from the cylinder to the gas distribution line.

Upon receipt of the command signal, the detector 8 directs the actuating signal to the electrical distributor 19, which connects the gas distribution line through the gearbox 6 to the source 5 of compressed gas. The compressed gas from the gas pipelines 21 and the fitting 18 enters the piston cavities of the cylinder 9 and simultaneously through the throttles 22 and the fitting 4 - the cavity of the sealers 3. Under the influence of the pressure of the compressed gas, the rods 10 are pulled out by means of the hinge pipes 11 and carry out squeeze shoes 12 to

pipeline walls, fixing the device in the pipeline. When extending the rods 10 at the same time due to the operation of the screw pair of groove 17 - tooth 16, the disk 15 rotates relative to the disk 14 by an angle corresponding to the full coincidence of the through holes 13 on the disks, opening the passage of the pumped medium through the cavity of the housing 2. Thus, a sharp drop in pressure drop is achieved on the device, which facilitates the force of fixing the device in the pipeline. In the process of braking the device, the cavity of the sealers 3 is filled with compressed gas, while the throttle 22s

configured so that the final injection of sealers is carried out

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after a full stop and fixation of the device, blocking the through holes of the device taking into account the change in speed and pressure of the pumped medium.

At the same time, when the spring-loaded rods 10 extend, the screw blades 24 with the cams 25 move to a distance L equal to the piston stroke of the cylinder 9, and the lead-in conical surface G of the cam 25 enters into contact with the bearings 35 of the hammer 29, and at the end of the stroke of the rods 10 the supports 35 clamping a place on the working surface of the cam 25, on a ledge or depression that occurs when the through holes 13 coincide. The fluid flow pumped through the device rotates the blades 24 with the cam 25 driving the impactors 29, the strikers 32 of which tvuyut with the inner surface of the pipeline 7 by supplying sound signa ly, which allows to accurately locate the device in the pipe 7. Possible change thick-| of tires pipeline wall 7 along its length is compensated by a spring 34

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Claims (1)

13 in the discs, and the cam 25 disengages from the drummer 29. Pere, the pressure drop across the device abruptly rises, and it is transported in the medium flow to the receiving chamber. Invention Formula A device for shutting off the pipeline by bus. St. No. 1328634, characterized in that, in order to increase the reliability of operation by providing signaling of its exact stop in the pipeline, on one of the rods, the screw blades with a cam rigidly attached to them, having from the end of the outer tubular housing having a conical surface, while on the outer tubular body in the guides there are spring-loaded impactors, which interact on one side with the inner wall of the pipeline, and on the other, with the cam. compression, located between the striker 32 and the support 35. After reliable sealing of the annular space between the wall of the pipeline 7, the outer surface of the housing 2 and the sealers 3, the necessary frame is inserted into this space. Upon completion of the work, the detector 8 is given a signal to unlock the device, the solenoid valves 18 are triggered, the gas is released from the cylinder 9 and the elastic sealers 3, 5, with the result that the shoes 12 and the sealers 3 move away from the wall of the pipeline 7, the disk 15 is rotated in the opposite direction by the reverse movement of the spring-loaded rod 10 overlapping through holes 13 in the discs, and the cam 25 disengages from the drummer 29. Pere, the pressure drop across the device abruptly rises, and it is transported in the medium flow to the receiving chamber. Invention Formula A device for shutting off the pipeline by bus. St. No. 1328634, characterized in that, in order to increase the reliability of operation by providing signaling of its exact stop in the pipeline, on one of the rods, the screw blades with a cam rigidly attached to them, having from the end of the outer tubular housing having a conical surface, while on the outer tubular body in the guides there are spring-loaded impactors, which interact on one side with the inner wall of the pipeline, and on the other, with the cam. Type A eleven nineteen FIG. 2 Фцг.З View 5 Fig.b Editor O.Spesyvyh Compiled by G.Vorobyova Tehred L. Oliynyk Order 968 Circulation 564 YNIIPI State Committee for Inventions and Discoveries under the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. Bb 5 Proofreader N.Korol Subscription