RU191923U1 - SHIELD SHUTTER - Google Patents

Abstract

The utility model relates to the field of pipeline valves, in particular for shutting off the flow of medium in the pipeline. A shield valve comprising a housing mounted on the pipeline or mounted on the wall of the manifold, provided with guides, and a shield made to move along the guides to ensure that the fluid flow in the pipeline is blocked or collector, using a lifting device connected to the housing through the upper attachment, and with a shield through the lower attachment, when this lifting device includes a hollow outer casing, closed at the ends, with liquid lubricant placed inside and the lower part of the hollow drive shaft with a drive nut inside it, and a lead screw fastened to the drive nut, while the upper part of the drive shaft of the lifting device is fixed in said upper mount, made in the form of a bolt flange connection with a nut fixed by a gujon, and the screw of the lifting device is fixed in the said lower mount, made in v de bolt flange connection of the hollow outer casing with the cover, while the lower end portion of the lead screw has a cross-sectional shape in the form of a square, while the corresponding square hole is made in the cover. The technical result achieved using the utility model is that the shield shutter It is able to withstand higher loads, and is in operation for a longer time in comparison with the known analogue, as well as in preventing the breakdown of the shield shutter shield during operation.

Description

FIELD OF TECHNOLOGY

The utility model relates to the field of pipeline valves, in particular, to block the flow of medium in the pipeline.

BACKGROUND

Known shield valve containing mounted on the pipeline or mounted on the wall of the manifold housing having rails in which a shield is installed associated with a lifting device, the lifting device includes a spindle placed inside an oil-filled pipe rigidly connected to the shield and interacting with the placed in the pipe with a driving nut connected to a hollow shaft connected to the drive. The lead screw is rigidly fixed in the lower part of the pipe filled with oil, and the hollow shaft is equipped with a safety element in the form of a shear pin (RF patent No. 63015, publ. 10.05.2007, IPC F16L 29/00). Known technical solution does not have sufficient operational reliability.

ESSENCE OF A USEFUL MODEL

The technical problem solved by the claimed utility model is to create a new panel shutter with improved performance, which will ensure operational reliability.

The technical result achieved by using the utility model is that the shield shutter is able to withstand higher loads and be in operation for longer time in comparison with the known analogue, as well as to prevent the shutter shield from breaking down during operation.

To solve the problem and achieve the claimed technical result, a shield valve is proposed, comprising a housing mounted on the pipeline or fixed to the manifold wall, provided with guides, and a shield configured to move along the guides to ensure that the fluid flow in the pipeline or manifold is blocked by a lifting device connected to the housing through the upper attachment, and with a shield through the lower attachment, while the lifting device includes it includes a hollow outer casing, closed at the ends, with liquid lubricant placed inside and the lower part of the hollow drive shaft with a drive nut inside it, and a lead screw fastened to the drive nut, while the upper part of the drive shaft of the lifting device is fixed in the upper the mounting unit, made in the form of a bolt flange connection with a nut fixed by the gujon, and the spindle of the lifting device is fixed in the aforementioned lower mounting unit, made in the form of a bolt flange connection Ia hollow outer body with a cover, wherein the lower end portion of the screw shaft has a cross sectional shape in the form of a square, while the lid holds a corresponding square hole.

In addition, in the proposed shield shutter, the upper safety assembly may comprise an articulated bearing.

At the same time, in the proposed shield shutter, the upper and / or lower safety assemblies may contain double seals.

The implementation of the upper mount in the form of a bolted flange connection with a nut fixed by a gujon, eliminates lateral loads on the site. In well-known designs of shield bolts, the upper node is made in the form of a split nut with a locking element, which leads to a constant effect on it from the side of the split nut, and the possible deformation of the entire assembly. The presence of an articulated bearing makes it possible to increase the reliability of the assembly during operation by eliminating the possibility of seizing during movement of the screw.

The implementation of the lower node in the form of a bolt flange connection increases its ability to withstand high loads, and the lower end portion of the lead screw with a square cross-section and the mating hole in the lid together makes it possible to simplify the design and increase the reliability of screw fastening under torsional loads. Known technical solutions for fastening the screw to the shield use cap nuts, which during operation are exposed to external influences, impact loads, and, accordingly, are not able to provide the necessary reliability of the fastener.

BRIEF DESCRIPTION OF THE DRAWINGS

The utility model is illustrated by drawings. The drawings are presented in a volume sufficient for specialists to understand the utility model, and in no way limit the scope of the utility model. In the drawings, like elements are denoted by like reference numerals.

In FIG. 1 shows the general construction of a shield shutter;

In FIG. 2 shows the mounting of the upper safety assembly;

In FIG. 3 shows a lifting device;

In FIG. 4 shows a lower safety assembly;

In FIG. 5 shows the upper safety assembly.

DESCRIPTION OF IMPLEMENTATION OF A USEFUL MODEL

As shown in FIG. 1 shield valve contains a housing (1) mounted on the pipeline or mounted on the wall of the collector. The body must meet the requirements of strength and can be made in the form of a single welded structure with a minimum number of welded joints. The housing (1) is equipped with guides (2), which can be made of a bent solid channel with a metal thickness of at least 10 mm and a length of at least 3 m. The shield (3) moves along the guides (2) to ensure that the fluid flow in the pipeline is blocked or the collector, using a lifting device (4) connected to the housing (1) by means of the upper mount (5), and with a shield (3) by means of the lower mount (6). The lifting device (4) is a unit containing a hollow outer casing (7), closed at the ends, with liquid lubricant placed inside and a lower part of the hollow drive shaft (8) with a spindle nut (9) inside, and a spindle (10) . The spindle (10) must always be in the lubricant, in all positions. The lead screw (10) is connected to the lead nut (9) having slots along its entire surface, which are oil pipes for regulating the oil pressure in the hollow outer case (7) of the lifting device, which is rigidly connected to the drive shaft (8). The upper part of the drive shaft (8) of the lifting device (4) is fixed in the upper mounting unit (5), made in the form of a bolted flange connection with a nut (11) fixed by the gujon (12), and the lead screw (10) of the lifting device (4) fixed in the lower mount (6), made in the form of a bolted flange connection of the hollow outer casing (7) with the cover (15), while the lower end portion (16) of the lead screw (10) has a cross-sectional shape in the form of a square, and in the cover (15) of the lower mounting (6) has a corresponding square hole Ie.

In the claimed utility model, the installation of the upper mount (5) on the housing (1) and the cover (15) of the lower mount (6) is carried out with bolts that can withstand a lateral load of at least 2500 kg. The flange connection made by these bolts several times overlaps the value of the maximum loads that arise during the operation of the shield shutter, which allows to extend the service life, as well as to avoid the breakage of the shield (3) of the shield shutter.

The upper mount (5) contains a spherical bearing (13) located on the drive shaft (8) of the shield shutter, which prevents jamming when raising and lowering the shield (3) during operation.

The lower mount (6) fastens the lead screw (10) with the shield (3), while the lower end portion (16) of the lead screw (10) has a cross-sectional shape in the form of a square, and in the cover (15) of the lower mount ( 6) a corresponding square hole is made, while the cover (15) of the lower attachment point (6) is fixed with a bolted flange connection, which together provides a higher degree of reliability during the operation of the shutter, since the possible screw breakdown (10) is prevented during torsional operation when lifting e or lowering the plate (3).

Goujon (12) provides a more reliable fixation of the safety nut (11) with the drive shaft (8), in comparison with the closest analogue, preventing the structure from loosening, preventing the shield (3) from breaking down during operation.

The upper and lower attachments of the shield shutter contain a double polyurethane seal (14), one of which is located around the circumference of the screw (10), while the second seal is located around the perimeter of the cover (15) of the lower attachment (6). This sealing system provides reliable sealing of both attachment points (5-6) of the shield valve, in particular the oil bath of the lifting device (4), preventing the oil bath from flowing during operation, and also protects the internal bolted connections from external contaminants during operation , which provides increased wear resistance of the nodes of the shield shutter and their operational reliability.

The operation of the shield shutter is as follows:

Panel locks are installed in sewer collectors to regulate the flow of the liquid medium flowing through it. The shield shutter housing (1) is usually mounted on the manifold. If it is necessary to shut off the medium flow in the pipeline, the shield (3) is driven along the vertical axis along the guides (2) of the housing (1) due to the rotation of the drive shaft (8) of the lifting device (4), which is connected to the housing (1) via the upper assembly fasteners (5), made in the form of a bolted flange connection with a nut (11), fixed by a gujon (12), and with a shield (3) by means of a lower fastener (6), while the movement of the shield (3) along the vertical axis is due to the movement of the driving nut (9), rigidly connected to the drive shaft (8), inside the hollow outer casing (7) along the spindle (10), placed in the liquid lubricant, and fixed in the lower mount (6).

The described design of the shield shutter can provide a tight seal of the channel with a pressure of 10 meters of water.

Thus, the claimed utility model has several advantages aimed at increasing the operational capabilities of the shield shutter.

Claims (11)

1. Shield shutter containing: - a body mounted on the pipeline, equipped with guides, and a shield made with the possibility of moving along the guides to ensure that the liquid flow in the pipeline is blocked by means of a lifting device connected to the body through the upper attachment point, and with the shield through the lower attachment point, - the lifting device includes a hollow outer casing, closed at the ends, with liquid lubricant placed inside and - the lower part of the hollow drive shaft with a spindle nut inside it, and a spindle screw fastened to the spindle nut, while - the upper part of the drive shaft of the lifting device is fixed in the aforementioned upper mount, made in the form of a threaded flange connection with a nut fixed by a gujon, and - the lead screw of the lifting device is fixed in the aforementioned lower mount, made in the form of a bolted flange connection, - while the lower end portion of the lead screw has a cross-sectional shape in the form of a square, - and in the lid made a corresponding square hole. 2. The shield valve according to claim 1, in which the upper mount includes a hinge bearing. 3. The panel shutter according to claim 1 or 2, in which the upper mount contains double seals. 4. The panel shutter according to any one of paragraphs. 1-3, in which the lower mount includes double seals.

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