RU2724286C1 - Pneumatic shut-off valve for sealing drain systems and chemical spill containment - Google Patents

Abstract

FIELD: water supply; sewerage.SUBSTANCE: invention relates to public utilities and concerns a shut-off device for shutting off pipelines of drainage systems and storm sewers used for holding spills of hazardous chemicals. Pneumatic shutoff valve includes an elastic cylindrical chamber with sleeves at the ends and a camera fixation mechanism in the pipeline, the chamber sleeves are pressed by means of clamps into two tubular covers, between which, coaxially to chamber fixed reinforced tube with holes on surface are fixed by means of threaded attachment and shaft, movably connected by means of bushing installed in lodgement, formed in internal surface of reinforced tube, and fixed in it by means of locking ring, on tubular covers coaxially fixed tubular guides, into which supports with supports are inserted diametrically and are fixed by nuts, on ends of guides there are installed nuts, one of which is blind and the second one is connected to a nozzle configured to be connected to an air line for supplying air to the chamber through a tubular guide and a reinforced tube with pressure openings, on the side of the nozzle a mechanism for fixation of the chamber in the pipeline, including earrings, on one side coaxially fixed on supports, and on other side - on pins with possibility of movement along pins, on which filter is fixed on one side and annular attachment element for engagement with end of waste pipe of pipeline on other side, wherein annular fastening element and filter accommodate ring secured at pins.EFFECT: increased protection of storm sewers from hazardous contaminants due to reliable fixation of pneumatic chamber in pipeline and autocentre of cylindrical chamber in pipe at its activation, which provides its accurate position in pipe and filling itself with intrapipe space without formation of slits between walls of chamber and inner surface of drain pipe.1 cl, 3 dwg

Description

The invention relates to public utilities and relates to a locking device for blocking the pipelines of drainage systems and storm sewers, used to hold the spill of hazardous chemicals.

A locking device for blocking pipelines is known (RF patent No. 2016313 published July 15, 1994), consisting of a housing in communication with the pipe, a pipe on which a locking body is installed in the form of an elastic torus filled with compressed gas medium, and the torus is surrounded by flexible tapes, one the end of which is fixed motionless on the nozzle, and the second is passed through the central hole of the torus, covers the torus on the outer surface and is connected with the movement mechanism.

This locking device for blocking pipelines is difficult to operate, requires significant installation effort. It cannot be used in flooded wells.

The closest analogue to the patented solution is a locking device consists of an elastic shell on which a pipe with a fitting is installed. The shell is placed in the tire, on the outer surface of which along the entire length and at a distance from each other no more than the diameter of the tire placed slings (RF patent No. 2241895, published 10.12.2004).

The known device does not provide for reliable fastening in the sewer, does not block the pipeline of irregular cylindrical shape. It is also difficult to use in flooded wells.

The technical problem is the creation of a locking device that is quickly and reliably fixed in the drainage system and is quickly activated in case of emergencies related to the risk of spillage of hazardous chemicals.

The problem is solved by improving the design of the pneumatic chamber and the mechanism of its fixation.

The technical result of the patented solution is to increase the protection of storm sewers from hazardous contaminants due to reliable fixation of the air chamber in the pipeline and the auto-centering of the cylindrical chamber in the pipe when it is activated, which ensures its exact position in the pipe and filling of the in-pipe space without the formation of gaps between the chamber walls and the inner surface sewer.

The claimed technical result is achieved due to the design of a pneumatic shut-off valve for sealing drainage systems and holding a spill of chemicals, containing an elastic cylindrical chamber with sleeves at the ends and a chamber fixing mechanism in the pipeline, the chamber sleeves are pressed into two tubular covers by clamps between which the camera is fixed coaxially by means of a threaded fastening, a reinforced tube with holes on the surface and a shaft movably connected by means of a sleeve installed in a lodgement formed in the inner surface of the reinforced tube and fixed in it by means of locking rings, tube guides are coaxially fixed to the tube covers, into which the calipers are inserted diametrically with supports and fixed by nuts, nuts are installed on the ends of the rails, one of them being blind, and the second connected to a fitting made with the possibility of connecting to the air line to supply air to the chamber through a tubular guide and a reinforced tube with pressure holes, on the nozzle side a camera fixing mechanism is fixed in the pipeline, including earrings, on the one hand coaxially mounted on supports, and on the other hand, on studs that can be moved along the studs on which the filter is fixed with one sides and an annular fastening element for engagement with the end of the pipe drain pipe on the other hand, and a shell fixed to the studs is installed between the annular fastening element and the filter.

The ring-shaped fastening element can be made in the form of a clamp with couplers, or in the form of a ring with dowels, while the couplers and dowels are designed to engage the ring-shaped element with the pipe end.

Pneumatic shut-off valve for sealing drainage systems and holding spills of chemicals. The basis of the valve is a pneumatic chamber - an inflatable rubber standard-sized pneumatic chamber with a locking mechanism. The pneumatic chamber can withstand the effects of chemicals flowing through the pipe during normal operation and emergency spills of chemicals for at least enough time to clean the collector. The valve is part of a comprehensive system for localization and containment of a chemical spill. Due to the support system mounted on the calipers radially with respect to the axis of symmetry of the camera, the camera is oriented coaxially to the pipe in which it is installed. The filter with a shell provides additional protection against large pollutants.

Next, the solution is explained with reference to the figures, which show the following.

FIG. 1 is a sectional view of a pneumatic shutoff valve.

FIG. 2 is a sectional view of a shut-off pneumatic valve chamber.

FIG. 3 is an end view of a pneumatic shutoff valve.

The shut-off valve consists of an inflatable elastic cylindrical chamber 2 with sleeves 4 at the ends, as well as a mechanism for fixing the chamber in the pipeline.

The sleeves 4 of the chamber 2 are pressed through the clamps 13 into two tubular covers 5 and 17, on the surface of which annular grooves are made 14. The cover (5 and 17) is a tube 19 with annular grooves 14 on the surface with a width of 6.5 mm and a depth of 4.25 mm and an end 18 sealed in the tube 19 and having a threaded hole 20.

Between the covers 5 and 17 inside the chamber, a reinforced tube 9 with holes 10 staggered on the surface of the tube 9 and a shaft 3 movably connected by means of a sleeve 15 mounted in the lodgement are fixed coaxially to it by threaded fastening.

A ball sleeve 15 and a thrust ring 16 are put on the shaft 3. The shaft is a tube with a diameter of 16 mm and a wall thickness of 2 mm. The length of the tube is 210 mm. A groove for ring 16 is made at one end of the shaft. At the other end, an M16X1.5 thread is cut with a length of at least 19 mm. The sleeve 15 provides free sliding of the shaft 3 inside itself. Ring 16 prevents the shaft from popping out of the sleeve. In turn, the sleeve 15 is placed in a lodgement in a reinforced tube 9 and is locked by a ring 16 from falling out of the lodgement. A cover 5 is screwed onto the thread of the shaft 3 by means of a threaded hole in the end face 18.

Reinforced tube 9 has a diameter of 34 mm and a wall thickness of 5.5 mm, the length of the tube is 370 mm. At one end of the tube, a lodgement was made for the sleeve 15 and the groove for the ring 16. At the other end of the tube, a 19 mm long M32X1.5 thread was cut. The holes 10 are staggered along the entire length of the reinforced tube in a checkerboard pattern. A cover 17 is screwed onto the amplifier thread. A spring 11 is inserted inside the reinforced tube 9, which allows the camera to maintain its shape in the inoperative position. When the chamber is inflated, the spring is compressed at the initial moment, then it is straightened and in the working state of the chamber, the spring is in the free position, without stretching and compression.

Guides 12 are screwed into the threaded holes of the ends 18 of the covers 5 and 17 of the chamber 2. The calipers 6 are screwed on with the guides 6. The nuts 21 and 8 are screwed onto the ends of the guides. The threaded connections are sealed with gaskets. Nut 8 is made blind. The fitting 22 is screwed into the nut 21, designed to pump air under pressure into the chamber, air enters through the tubular guide and reinforced tube and enters the chamber through openings 10. If necessary, the number of chambers can be increased.

On the nozzle side, earrings 24 are screwed into the valve supports, which are mounted on the studs 26 to move along the studs, thereby centering the valve in the pipe. A filter 25 is put on the studs 26 and secured with the “wing” nuts 27. A shell 28 is put on the filter. An annular element 1, which is a clamp with ties, or a ring with dowels, is fixed on the end of the shell opposite the end with the filter.

For various sizes and types of pipes, chambers of three standard sizes are provided, shown in table 1.

Table 1. Characteristics of the shut-off valve for pipes of three sizes.

Valve characteristic Pipe diameter mm 150 ÷ 260 260 ÷ 510 510 ÷ 910 The diameter of the blocked pipes and pneumatic chambers (in a deflated state) - from 12 to 25% of the pipe diameter, mm 36 ÷ 40 60 ÷ 66 109 ÷ 119 Air trap length, mm 460 ÷ 500 605 ÷ 681 700 ÷ 766 Air Pressure, bar 0.27 ÷ 0.28 0.20 ÷ 0.21 0.13 ÷ 0.14 Air chamber activation time (drain pipe sealing), sec 11 ÷ 13 20 ÷ 25 35 ÷ 40 All air locks in the activated state are guaranteed to hold a pressure of> 2.07 bar (> 2 atmospheres), which corresponds to approximately 18.3 m of the water column of the diameter of a standard drainage collector.

Description of the construction.

The shut-off valve is inserted into the sewer and fixed at its end using an annular fastener 1. Ties or dowels of the annular fastener 1 grab the pipe and are tightened together by screws. Liners are screwed onto the couplers (or dowels) of the ring-shaped fastener. Studs 26 are screwed into the holes of the inserts. Using the supports 7, the valve is automatically centered in the sewer due to the location of the supports opposite the pipe. An air supply pipe under pressure is connected to the inlet fitting 22. When a closing command is received, air begins to be pumped into the valve. The valve bubble inflates and blocks the pipe.

Claims (1)

Pneumatic shut-off valve for sealing drainage systems and holding the spill of chemicals, containing an elastic cylindrical chamber with sleeves at the ends and a chamber fixing mechanism in the pipeline, the chamber sleeves are pressed into two tubular covers by clamps between which a reinforced tube with holes is fixed to the chamber coaxially through a threaded fastening on the surface and the shaft, movably connected by means of a sleeve installed in a lodgement formed in the inner surface of the reinforced tube and fixed in it by means of a locking ring, tubular guides are coaxially fixed to the tubular covers, in which the calipers are inserted diametrically with supports and secured with nuts at the ends nuts are installed on the guides, while one of them is blind, and the second is connected to a fitting made with the possibility of connecting to the air line to supply air to the chamber through a tubular guide and a reinforced tube with pressure holes m, from the side of the fitting the camera’s fixing mechanism is fixed in the pipeline, including earrings, coaxially mounted on the supports on one side, and on the studs with the possibility of moving along the studs, on which the filter is fixed on one side and the ring-shaped fastening element for engagement with the end of the sewer pipe on the other hand, and between the annular fastening element and the filter there is a shell fixed on the studs.

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