RU2699456C1 - Valve with guide vanes - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building, mainly to pipeline valves, namely to valves with rotary plugs. Valve comprises housing with inlet and outlet channels, in which in two seats there is a shut-off device connected to its rotation drive and made with through hole, wherein the valve is provided with at least one pair of guide vanes fixed on the housing inner wall in symmetry to each other relative to the vertical section plane of the housing extending along the housing central axis, wherein one of the pair blades is fixed on the inner surface of the inlet channel of the housing, and the second one – on the inner surface of the outlet channel of the housing, and the sealing gasket located in the upper part of the housing between the internal surface of the valve housing and the outer surface of the shut-off member, besides, the guide vanes comprise concave sections facing the bottom part of the housing.

EFFECT: redistribution of flows (cross-flow of transported medium) is achieved inside the valve housing during opening/closing with self-cleaning of the bottom part of the housing by the transported medium.

5 cl, 3 dwg

Description

The invention relates to the field of mechanical engineering, mainly to pipe fittings, namely to cranes with slewing plugs.

Known ball valve having a housing with inlet and outlet channels, two o-rings, one of which is connected to the inlet channel, and the other to the exhaust channel, and a rotating switching ball. The ball is adjacent to both o-rings and has a through hole. This opening in the open position of the switching ball together with the inlet and outlet channels forms a passage channel. When the overlapping ball is in the locked position, the o-rings cover the corresponding sealing regions on the surface of the switching ball. The switching ball has at least one flushing channel on the inlet side and at least one flushing channel on the exhaust side. The flushing channels begin in the passage channel and extend to areas outside of at least one of the sealing areas on the surface of the switching ball. Flushing channels are made on the surface of the switching ball in the form of grooves. These grooves in the open position of the switching ball are on a straight line with the corresponding grooves that are made at the ends of the inlet and outlet channels located on the inside of the housing (patent RU 2224938 C2, F16K 5/06 (2000.01).

The disadvantages of this design is the contact of the washing channels located on the surface of the switching ball with seals, which leads to their wear during operation and loss of tightness. The second embodiment with holes instead of grooves provides only a slight circulation of the working medium, which will not allow for effective washing of stagnant zones from deposits of paraffins and mechanical impurities during transportation of contaminated and viscous liquids, and vice versa will accelerate the deposition of contaminants at the bottom of the casing.

In the prior art, a crane is known which comprises a housing in which a spherical locking element is mounted in two saddles and is connected with a drive for its rotation and made with a through hole. What is new is that at one end of the through hole a partition is made with an opening coaxially located through the hole. At the other end of the through hole, an annular groove is provided with a retaining ring. A guide sleeve for a ball made of a profile pipe is installed in the through hole. A profile pipe abuts against one wall with one end, and with another with a washer located next to the retaining ring. Opposite the opening of the partition in the cavity of the profile pipe, with the possibility of movement along this pipe, a ball is installed that is spring loaded relative to the washer by a compression spring (patent RU 161849 U1, IPC F16K 5/06, 05/10/2016).

The disadvantages of this design are the large overall dimensions and technical complexity of the implementation. The design of the bottom of the casing and the shutter assembly will not allow efficient washing of stagnant zones from deposits of paraffins and solids during transportation of contaminated and viscous liquids, and vice versa will accelerate the deposition of contaminants at the bottom of the casing.

The technical problem to which the claimed invention is directed is the development of a crane design that ensures self-cleaning of the bottom of the body of the transported medium by adding new structural elements - guide vanes and gaskets.

The technical result consists in improving the quality of cleaning the bottom of the crane body by increasing the flow rate of the transported medium in the lower part of the body and eliminating the flow of medium in the upper part of the body.

The specified technical problem is solved, and the technical result is achieved due to the fact that the crane contains a housing with inlet and outlet channels, in which two seats have a locking element connected to the drive of its rotation, and made with a through hole, while the crane is equipped with at least at least one pair of guide vanes mounted on the inner wall of the housing symmetrically to each other relative to the plane of the vertical section of the housing passing along the central axis of the housing, while one of the blades of the pair is fixed on the inner surface of the inlet channel of the housing, and the second on the inner surface of the exhaust channel of the housing, and a sealing gasket located in the upper part of the housing between the inner surface of the valve body and the outer surface of the shut-off element, while the guide vanes contain concave sections facing the bottom of the housing .

The development and refinement of the invention are the following features:

- the gasket is made of elastomer;

- guide vanes made of metal;

- guide vanes are made of elastomer;

- the locking body is made in the form of a tube of spherical, cylindrical or conical shape.

The invention is illustrated by drawings, where in FIG. 1 - shows a General view of the body of the crane in section with a sealing gasket and pairs of guide vanes, in FIG. 2 - shows a General view of the crane in section in an intermediate position of the locking body indicating the direction of flow of the transported medium, in FIG. 3 - shows a-a horizontal section of the crane with the direction of flow of the transported medium.

In the drawings, the positions have the following numerical designations:

1 - rotation drive;

2 - case;

3 - a saddle;

4 - a locking organ;

5 - sealing gasket;

6 - a pair of guide vanes;

7 - inlet channel;

8 - exhaust channel

The present invention is illustrated by an example, which is not the only possible, but clearly demonstrates the possibility of achieving this set of features of the specified technical result.

The crane comprises a housing 2, in which a locking element 4 is connected in two saddles 3, connected with its rotation drive 1.

The locking element 4 may be made in the form of a tube of spherical, cylindrical or conical shape.

The sealing gasket 5 is made in the form of half-shells of elastomer, the inner surface of which covers the upper part of the housing 2.

The half shells of the gasket 5 are placed symmetrically with respect to the vertical central axis of the valve body 2 in the upper part of the valve between the inner surface of the valve body 2 and the outer surface of the locking member 4.

The sealing gasket 5 is located with touching the surface of the locking element 4 to ensure higher efficiency of blocking the flow of the transported medium through the upper part of the housing 2.

In the intermediate position of the locking element 4, the overflow of the transported medium through the upper part of the housing 2 is blocked by a sealing gasket 5 and the flow rate in the lower part of the housing 2 increases.

The housing 2 contains an inlet channel 7 and an outlet channel 8.

The inlet channel 7 and the exhaust channel 8 form a passage channel of the housing 2.

The crane is designed in such a way that it is not assigned a specific position. That is, both sides of the housing 2 can work both for the inlet and for the release of fluid.

Guide vanes are installed in the inlet channel 7 and the outlet channel 8 of the housing 2, forming three pairs of guide vanes 6 fixed to the inner wall of the housing 2 (Fig. 1).

Each pair of guide vanes 6 contains one guide vane fixed on the inner surface of the intake channel 7 of the housing 2 and a second guide vane fixed on the inner surface of the exhaust channel 8 of the housing 2.

Two guide vanes of the pair are located symmetrically to each other relative to the plane of the vertical section of the housing, passing along the central axis of the housing 2.

The guide vanes contain concave sections facing the bottom of the housing 2, which direct the incoming flow of fluid from the inlet channel 7 to the bottom of the crane body 2.

Concave sections of the guide vanes are located at a predetermined angle relative to the Central vertical axis of the crane 2.

The flow is evenly distributed along the bottom of the casing 2, thanks to the guide vanes, and effectively flushes the stagnant zone.

The guide vanes can be made of metal, structurally without touching the surface of the locking element 4 with a minimum gap or an elastomer with touching the surface of the locking element to provide higher efficiency of the direction of flow of the transported medium in the bottom of the housing 2.

The number of pairs of guide vanes, shapes, geometrical dimensions, material and method of attachment are determined based on the technical characteristics of the crane and the transported medium.

In FIG. 2-4, the arrows conventionally show the flow of the transported liquid, but the flow direction can be changed - it depends on the position of the valve, that is, channel 7 can become an outlet, and channel 8 can be an inlet channel. For simplicity in the description, the condition is taken to be the initially specified flow direction.

The overflow of the transported medium through the upper part of the casing is blocked by a gasket 5 and the flow rate in the lower part of the casing 2 increases.

Thus, the proposed crane with guide vanes for washing the bottom of the body provides automatic elimination of accumulating water and contaminants in the bottom of the body under the shut-off element 4 when opening / closing due to the redistribution of the flow of the transported medium inside the crane body.

The design is easily implemented in existing models of cranes without making changes to the basic elements of the device.

Claims (5)

1. A crane comprising a housing with inlet and outlet channels, in which a locking element is connected in two seats, connected with a drive of its rotation and made with a through hole, characterized in that it is provided with at least one pair of guide vanes mounted on the inner wall the housing symmetrically to each other relative to the plane of the vertical section of the housing passing along the central axis of the housing, while one of the blades of the pair is fixed on the inner surface of the inlet channel of the housing, and the second on the inner surface of the discharge passage body and a sealing gasket disposed in the upper portion of the housing between the inner surface of the valve body and the outer surface of the locking body, wherein the guide vanes comprise concave portions facing the housing bottom. 2. The crane according to claim 1, characterized in that the sealing gasket is made of elastomer. 3. The crane according to claim 1, characterized in that the guide vanes are made of metal. 4. The crane according to claim 1, characterized in that the guide vanes are made of elastomer. 5. The crane according to claim 1, characterized in that the locking member is made in the form of a tube of spherical, cylindrical or conical shape.

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