RU2016325C1 - Expandable volume type closing device - Google Patents

Abstract

FIELD: pipeline transportation systems. SUBSTANCE: a closing member with normally closed central cylindrical duct is arranged in a cylindrical turning of a body. The closing member is in the form of regular cylindrical body of elastic porous material. A diameter of the member and a length of the duct are more, than a diameter of the turning. The member is in the form of separate sections. EFFECT: enhanced reliability. 1 cl, 1 dwg

Description

 The invention relates to pipeline transport and can be used on stationary and collapsible pipelines for various purposes.

 Existing methods of separation of pipeline communications into isolated sections in the event of an accident are associated with the use of expensive equipment (in the case of automated control of linear valves) or require significant time (in the absence of automation), material consumption, which reduces their economic and environmental efficiency.

 Known locking device, which consists of an elastic element that changes shape under the influence of a rotating on the thread of the pressure sleeve.

 The device has the following disadvantages: it requires external forces to drive, which negatively affects the speed and autonomy of work.

 A device is known, consisting of an elastic balloon, which under the influence of the core, moving, overlaps the bore.

 The disadvantages of this device: the need to maintain excess pressure in the cylinder, the drive from an external device.

 Known valve having a working body of two wings, closing in the presence of a reverse flow (pressure) of the medium. Disadvantages of the valve: distortion of the flow shape, insignificant contact length of the valves along the flow, low reliability in the absence of back pressure, which excludes its use in horizontal pipelines.

 Also known is a locking device consisting of a housing in which an elastic element is installed, which opens the bore in the presence of pressure and closes in the absence of pressure.

 This device has the following disadvantages: the need for the creation and constant monitoring of excess pressure to ensure tightness, the working flow area has a slotted shape, which makes it difficult to skip cylindrical technological devices.

 Known locking device having a housing in the form of a detachable cylinder, a working body of elastic material in the form of a thin-walled housing with a Central channel, overlapping due to the elastic properties of the material.

 The disadvantages of this device: insignificant contact surface of the working surfaces in a neutral state, which does not provide guaranteed overlap of the horizontal pipeline in both directions when the pressure in it drops to atmospheric; the presence of a limiting element that counteracts the turning of the working body inside out, which partially overlaps the cross section of the pipeline, making it incomplete.

 Known locking device volumetric action, comprising a housing in a cylindrical bore of which is placed a locking body with a normally closed central cylindrical channel.

 The main disadvantages of this device are: the presence of a working channel of a flat shape distorts the shape of the flow and does not provide a full bore section corresponding to the shape of the pipeline, which prevents the execution of technological operations with the separation of the pumped products with various physical properties and the passage of cylindrical mechanical devices through the pipeline; the process of compaction of two planes does not guarantee the cessation of flow in the absence of excess pressure, while at the same time in the presence of back pressure it does not guarantee the working body from turning inside out; the shape of the working body made of soft rubber does not allow for a full-volume overlap of the cross section with the automatic formation of a passage channel. A comparative analysis of the proposed technical solution with the prototype shows that the proposed device differs from the prototype in the following: the principle of the compaction process; the form of the working body; type of material of the working body; the form of the working (passage) channel; management of the working body.

 These differences give the proposed device the following new qualities: the presence of a working body of volumetric action from an elastic porous material allows for tightness at atmospheric pressure; provision in the open state of the full bore channel; the volumetric form of the working body provides a guarantee against inversion to the side of the return flow and for this reason violation of tightness; the manufacture of a working body from separate sections provides a counteraction effect, in which leakproofness against product backflow is achieved depending on specific conditions; the absence of an external means for creating excess pressure in the working body leads to almost complete automation of the process of overlapping the pipeline cross section due to the energy of the working body itself and the product flow at no additional cost.

 The drawing shows the proposed device.

 The device consists of a housing 1, in which a working body 2 is mounted, made of an elastic porous material (such as a “sponge”), consisting of one or more volume sections having a central channel 3 and kept from longitudinal movement by the sleeve 4.

 The device operates as follows.

 If there is a product flow in the pipeline under excess pressure greater than the calculated one in the given direction due to the force action of the flow on the funnel-shaped surfaces at the inlet to the working body, the latter are moved to the periphery and open the central channel 3, and with an increase in the speed of the product, the degree of opening of the channel increases, creating This is a full-wired cylindrical channel.

 When the flow velocity drops to zero, the force action in the forward direction disappears, the porous material assumes a natural shape and overlaps the passage section of the locking device for a considerable distance, which ensures tightness at atmospheric pressure. In this case, in the event of a return flow, the product creates an additional removing load due to the force acting on the conical surface from the outlet side and helps to ensure tightness.

 To ensure the overlap of the pipeline cross-section under specified specific conditions and to prevent the working body from turning in the direction of return flow with loss of tightness, variants with a set of several sections of the working body that are prevented from longitudinal movement by a removable sleeve 4 are possible.

 This device, in addition to providing automatic (autonomous) blocking of the pipeline cross-section, eliminates the use of expensive massive linear valves and excludes its unauthorized blocking.

Claims (1)

 VOLUME ACTION LOCKING DEVICE, comprising a housing, in the cylindrical bore of which a locking element with a normally closed central cylindrical channel is located, characterized in that the locking element is made in the form of a full-volume cylindrical body made of elastic porous material, the diameter of the locking element and the length of the central cylindrical channel are larger than the diameter boring the case, and the locking body is made of separate sections.

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