RU2278312C1 - Shut-off device for shutting-off pipe lines - Google Patents

Abstract

FIELD: pipe line fittings; shutting-off pipe lines carrying liquid medium.

SUBSTANCE: proposed shut-off device has cylindrical body, cone with holes and elastic hose. Device is additionally provided with shut-off cock. Elastic hose is throughway in construction. Vertex of truncated cone is directed to outlet hole of body. Cock is fitted at hose outlet in cone vertex.

EFFECT: mechanization of operation under action of energy and pressure of product being transported; simplified construction.

2 dwg

Description

The invention relates to pipe fittings and can be used to shut off pipelines for various purposes, through which a liquid medium is transported.

The following device is known (copyright certificate RU No. 2015438, IPC 5 F 16 K 3/00, 06/30/94, Bull. No. 12), in which an inverted sleeve of elastic material filled with a compressed gas medium, fixed at one end is used as a locking member in the case, and another wound on a drum. When opening or closing the device, the sleeve is wound or wound from the drum, opening or closing the inlet and outlet openings. A common feature of the analogue of the claimed device is an elastic sleeve and a housing with inlet and outlet openings.

The disadvantages of the device are the impossibility of mechanizing the operation of the device under the action of energy and pressure of the transported product - to close (open) the device, a separate movement mechanism is used, as well as large dimensions, the need for sealing in the places where moving parts exit the housing, energy consumption for the drive mechanism to work.

A device is known (copyright certificate SU No. 1789812, IPC 5 F 16 K 3/00, 01/23/93, Bull. No. 3), the essence of which is as follows. As a locking element in the known device uses a conical valve. The valve assembly is connected to an elastic diaphragm. The diaphragm is made in the form of an inverted inside out and fixed around the circumference of the housing with the inlet and outlet openings of the elastic sleeve, to the free end of which is coaxial to the outlet through the cable attached conical cargo valve. The outlet is provided with a mating conical seat. A common feature of the analogue of the claimed device is an elastic sleeve and a housing with inlet and outlet openings.

The process of operation of this device is partially mechanized due to the energy of the transported product, but a significant drawback is that to open (close) the locking device, it is necessary to change (decrease or increase) the pressure in the network, which is very difficult to implement. Also disadvantages of the device are: the need for accurate processing and the difficulty of maintaining good condition during operation of the valve mechanism.

A device is known according to the copyright certificate SU No. 1796832, IPC 5 F 16 K 3/00, 23.29.93, Bull. No. 7. SUMMARY OF THE INVENTION: inside the case with nozzles, a locking element is installed, made in the form of a flexible sleeve, one end of which is turned inside out and fixed around the perimeter on the wall of the case, the other is connected to the movement mechanism, which is a drive drum. The sealed cavity formed by the sleeve and the blind end of the housing in which the drum is located is filled with compressed gas. The movement mechanism is equipped with a second drive drum and a cable, each end of which is wound on one of the drums. The cable is passed through the free end of the flexible sleeve attached to the cable between the reels.

The disadvantages of this device are the impossibility of mechanizing the operation of the device under the action of energy and pressure of the transported product - to open (close) the device, a special drive mechanism with an external energy source is used, as well as large dimensions, the need for sealing at the exit points of the moving parts of the movement mechanism.

As a prototype taken the device according to GB 1190728 A, class. F 16 K 7/10, 05/06/1970. SUMMARY OF THE INVENTION: A cone with holes with a vertex at the inlet of the valve (towards the movement of the liquid) is installed in the through-passage housing. The cone completely covers the section of the body. An elastic diaphragm in the form of a blind sleeve with different wall thicknesses is installed inside the cone. To supply the working medium under pressure from an external source into the diaphragm, a special channel is made.

The disadvantages of the device are the need for an additional source of high pressure and design complexity.

The technical result, which the invention is directed to, is to mechanize the process of the device under the action of energy and pressure of the transported product and simplify the design. Obtaining a technical result is achieved by the fact that in the proposed locking device for blocking pipelines, consisting of a cylindrical body, a cone with holes and an elastic sleeve, an additional valve is introduced, the elastic sleeve is made through, the cone with holes is truncated and placed at the top to the outlet of the housing, and the crane is installed at the outlet of the sleeve at the top of the cone.

The execution of the sleeve through passage with the installation of a tap at the outlet allows the transported liquid to pass with the tap open, reducing the overall resistance of the locking device. When the valve is closed at the inlet and inside of the sleeve, additional pressure is created due to the high-speed pressure and a decrease in the total flow area, which ensures inflation of the sleeve and overlapping the valve section.

The execution of the cone truncated with the placement of the apex to the outlet of the housing allows you to install a tap at the outlet of the cone and to ensure reliable closing of the holes due to the pressure drop on both sides of the surface of the cone.

The difference from the prototype is the execution of an elastic sleeve through passage, the execution of the cone truncated and placing it with its apex to the outlet of the housing and installation of a stopcock at the outlet of the sleeve. The presence of distinctive features allows us to conclude that the claimed device meets the criterion of "novelty."

In technology, cranes are widely used to shut off pipelines. With increasing diameters of the pipelines, the stroke of the locking member and the amount of force required to move the locking member increase. This causes the need to include in the design of the valve (locking device) a mechanical or electromechanical drive of the locking element, which increases the size and complexity of the valve (Calculation and design of pipe fittings. Gurevich DF Publishing House "Engineering", 1968, p.56 ) Known devices for blocking pipelines during repairs (pneumatic plugs) cord or elastic, which are containers filled with compressed air or water (Trenchless methods of restoring water supply and drainage networks: Textbook for universities / S.V. Khramenkov, O.G. Primin, V.A. Orlov - M .: TIMR, 2000-179 p.). However, these devices are used only during repairs and are not suitable for stationary use.

In the claimed combination of features, the introduction of a crane into the elastic sleeve at the apex of the truncated cone allows to close (the sleeve in the extended position) and open (the sleeve is not extended) the locking device using a pressure differential.

Thus, only the totality of all the distinguishing features, namely: the additional introduction of the tap, making the elastic sleeve through, making the cone truncated and placing it with its apex to the outlet of the body and installing at the outlet of the sleeve at the top of the tap cone provides new properties of the locking device - the mechanization of the process the operation of the device under the action of energy and pressure of the transported product, which indicates the compliance of the claimed invention with the criterion of "inventive step s. "

The proposed device for blocking pipelines is illustrated by drawings, in which Fig. 1 shows a diagram of a device in an open state, and in Fig. 2 in a closed state.

The device consists of a cylindrical body 1 (Fig. 1), in which a truncated cone with holes 2 and an elastic passage sleeve 3 are installed coaxially to the housing. Sleeve 3 is installed inside the truncated cone 2. The output of the passage sleeve 3 — the hole 5 overlaps the stopcock 4, arrow 6 shows the direction of fluid movement.

The device operates as follows. When the shut-off valve 4 is closed (FIG. 2), due to the high-speed pressure and a decrease in the flow area, the pressure in the sleeve 3 increases. In addition, the flow area of the housing 1 of the device decreases, as a result, the fluid velocity around the sleeve 3 increases with a corresponding decrease in pressure (Bernoulli equation). There is a pressure drop inside and outside the sleeve 3. The sleeve 3 is stretched to the inner surface of the cone 2, blocking the cross section of the locking device. Due to the pressure drop on both sides of the cone 2 due to the "suction" of the sleeve 3 to the cone 2, the device is reliably closed. When you open the shut-off valve 4 (Figure 1), the pressure drop on both sides of the wall of the sleeve 3 decreases or disappears and the sleeve 3 acquires its original shape, opening the locking device.

Thus, the proposed device allows you to use the energy and pressure of the transported product to switch the locking device, which simplifies its design, eliminating the need for an additional pressure source, reduces its dimensions to pipe dimensions, which allows the use of a locking device for large diameter pipelines, facilitates and simplifies its maintenance and operation.

Claims (1)

A locking device for blocking pipelines, comprising a cylindrical body, a cone with holes and an elastic sleeve, characterized in that the device additionally has a stopcock, an elastic sleeve is made through, a cone with holes is truncated and mounted at the top to the outlet of the housing, and the valve is placed on outlet sleeves at the top of the cone.

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