RU2547200C2 - Disk valve - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: valve consists of two semibodies coupled with each other. A gate is installed in the boring of one of the semibodies, is fitted by the internal radius boring in which gear notches are provided and the teeth of a driving shaft passing through the notches are kinematically coupled with them, a centre pad with a plain bearing inside is located inside the latter boring. The end of the driving shaft is fitted by a hole where a ball thrusting upon the internal conical boring in the centre pad housing is placed. The end face of the centre pad is provided with cross grooves and the cylindrical surface - with longitudinal grooves to deliver lubricant from an oiler to the interacting surfaces of the gearing. The gate is installed on a rotation axis and comprises recesses at the periphery of the radius boring. Spring-loaded seats are mounted in the axial channels of the semibodies and are pressed to the gate to ensure leakproof contact. Opening and closing of a working medium flow is provided by the gate rotating on the axis at the driving shaft rotation. Mechanical impurities and scale present in the lubricant are collected in the recesses at the periphery of the radius boring.

EFFECT: improved performance characteristics.

4 dwg

Description

The invention relates to the field of petroleum and chemical engineering and can be used as a locking device for wellhead fountain fittings and pipelines.

Known valve (II) (see US Pat. RF. No. 2.246.652, M. CL F16K 3/06; 27/04, publ. 02.20.2005, bull. No. 5).

The valve consists of a body in the form of two interconnected half-bodies, between which a disk gate with a gear sector is placed. The latter interacts with the drive gear. Connection of half-shells - by means of retaining half-rings.

The disk gate has at least two through holes. The gear sector on the disk gate is closed.

The disadvantages of the design include the fact that the installation-connection of the half-shells with retaining half rings heated to a high temperature cannot provide a reliable and tight connection:

- when dismantling the valve, it may be difficult to remove the half rings of the bandage, since they must be heated, but at the same time, the half shells will be heated due to heat and mass transfer, which is difficult to control;

- the location of the gear sector relative to the gear, it means external gearing, requires the application of more torque on the rotation of the disk gate;

- the design of the valve does not provide for the supply of lubricant to the sliding bearings and gear meshes of the gear with the teeth of the crown.

Known valve (see US Pat. RF №2.229.051, M. CL F16K 3/06, publ. 05/20/2004).

The valve consists of two half-bodies, between which a spacer ring is fixed, in the inner cavity of which there is a disk gate with a passage channel. The gate rotation mechanism consists of a gear sector made in it, with which the drive gear interacts. The disk gate is centered on the inner diameter of the spacer ring. A segment lubricating groove is made on the inner surface of the spacer ring, symmetrically of the drive gear, from the gear sector. The length of the lubrication groove is equal to the length of the adjustment. The diameter of the passage channel is calculated. Thrust bearings in the form of contour sealing elements are installed on the end surfaces of the gate.

To prevent the ingress of the working medium into the peripheral cavity, thrust bearings in the form of contour sealing elements are installed on the supporting surfaces of the disk gate. The gate seal is provided by two spring-loaded seats.

Lubrication in the gaps between the gate and the half-bodies, as well as in the gear area during the assembly of the valve, is supplied through the discharge valve and special channels made in the shaft - gear and gate.

Known valve (see US Pat. RF №2.286.499, M. CL F16K 3/06, publ. 05/10/2006).

The valve consists of two interconnected semi-bodies, between which an intermediate ring is fixed, in the cavity of which there is a disk gate with a gear ring installed with the possibility of interaction with the drive shaft gear. The ring gear is installed in the cavity formed by the gate, the intermediate ring and the floor of the buildings.

Valve operation

When the shaft - gear rotates, the ring gear is rotated on the axis from the "open" position to the "closed" position. The angle of rotation of the drive shaft depends on the main dimensions of the valve parts: the disk gate and the parameters of the ring gear.

The disadvantages of the design of the device include the following:

- the presence of an intermediate ring between the half-shells requires a sufficiently high precision manufacturing of mating parts and additional costs of working time;

- the supply of lubricating fluid and preservative using a pressure valve to gearing is difficult due to the lack of a feed channel;

- alignment of the drive shaft is ensured by the use of a sliding bearing on the installation side of the discharge valve;

- during operation of the valve in the “open” position during long-term operation, there is a change in the properties of the lubricating and preserving fluids, the appearance of oxides, which leads to incomplete “opening”, “closing” of the gate, since impurities are deposited at the boundary of the gear.

The technical result that can be obtained by implementing the invention is as follows:

- direct supply of lubricating fluid to the gear;

- direct supply of preservative fluid into the free cavity inside the valve;

- the ability to center the drive shaft relative to the teeth of the crown of the radial bore of the gate due to the presence of a rolling body (ball) with a thrust bearing on one support and a sliding bearing on another support;

- the ability to withdraw oil and preservative fluid with mechanical particles from the zone of interaction of the teeth of the drive shaft with the teeth of the crown in the pockets on the periphery of the radius bore.

The technical result is achieved by the fact that the butterfly valve consists of two interconnected half-bodies, a gate with a toothed rim in a radius bore, mounted on the axis of rotation, of a drive shaft with sliding bearings.

A cylindrical bore is made in the left half-hull and a thrust plate is installed in the form of a glass. A number of longitudinal grooves are made on its outer cylindrical surface, combined with transverse grooves made on its bottom. Also, this glass is equipped with a conical hole facing the large base of the cone to the drive shaft, at the end of which a hole is made and a spherical support is installed - a ball, with the possibility of interaction with the surface of the cone in the body of the thrust bearing. Pockets are made in the gate, on the periphery of the radius bore, and the sliding bearing is located inside the thrust bearing.

The design of the butterfly valve is shown in the drawings, where:

- figure 1 - design of the valve in the context;

- figure 2 - design of a disk gate;

- figure 3 - construction of the support (thrust bearing);

- figure 4 is a pointer to the position of the gate.

The butterfly valve consists of a left half-housing 1 with a technological bore 2, in which a slide 4 with a radius bore 5 is installed on the axis 3. This bore is equipped with an internal gear rim 6 (see figure 2), to which the drive shaft 7 is connected kinematically cylindrical bore 8 in the right half-housing 9. In the left half-housing 1, a cylindrical bore 10 is made axisymmetrically to the bore 8 in the right half-housing 9, in which a thrust bearing 11 with a sliding bearing 12 covering the output end of the drive shaft 7 is placed.

An opening 13 is made at the end of the drive shaft 7, in which a ball 14 is placed, which is installed with the possibility of kinematic contact with the internal conical groove 15 in the body of the thrust bearing 11.

The right half-housing 9 is equipped with a bearing 16, covering the drive shaft 7 and pushed by the cover 17 due to bolting.

The left half-housing 1 is equipped with a discharge valve 18 mounted on a thread, the flow channel of which is hydraulically connected to the transverse grooves 19 on the bottom of the thrust bearing 11, on the outer cylindrical surface of which longitudinal grooves 20 are made, hydraulically connected to each other (see Fig. 3).

Radius bore 5 is made in the form of an arc, the opening angle of which is sufficient to ensure the opening and closing of the valve, when the drive shaft 7 is in the far right or leftmost positions. In the body of the disk gate 4 from the side opposite to the location of the drive shaft 7, pockets 21 are made on the periphery of the radius bore 5 (see FIG. 2) for accumulating scale and mechanical impurities.

Through openings 22 are made on the toothed ring of the gate, in the areas between the teeth, which serve to displace the fluid from the engagement zone when the pinion shaft rotates and interacts with the toothed ring of the gate. These holes also act as pockets for the accumulation of scale and mechanical impurities.

Technological bores 24 and 25 are made in the axial channels 23 of the left half-housing 1 and the right half-housing 9, in which saddles 26 and 27 are placed, which are pressed against the surface of the gate 4 by springs 28 and 29.

The annular gap between the seats 26 and 27 and the half-shells 1 and 9 is closed by the sealing rings 30 and 31.

The technological gap between the left 1 and right 9 half-shells is sealed by a sealing ring 32. The isolation of the annular gap between the drive shaft 7 and the cover 17 is provided by the sealing ring 33. The output end of the drive shaft 7 is provided with a connecting place on which the removable handle 34 is attached.

Disk Gate Valve Operation

The valve with mounting flanges is mounted on site. In this case (see Fig. 1), the valve is shown in the hydraulic connection of the axial channel 23 of the left half-housing 1 with the axial channel 23 of the right half-body 9. In this position, the valve is considered to be open to the passage of the working fluid. The saddles 26 and 27 are pressed by the force of the springs 28 and 29 to the end surfaces of the gate 4.

When the pressure valve 18 is opened, lubricant is injected under pressure into the bore 10 in the left half-housing 1, from where the grease is supplied through the transverse grooves 19 on the bottom of the thrust bearing 11 and the longitudinal grooves 20 to the contacting teeth of the crown 6 and the teeth of the drive shaft 7 by the gap between the gate 4 and the inner the surface of the technological bore 2 in the left half-housing 1. Also, using the pressure valve 18, a preservative fluid is supplied to fill all the free internal cavities inside the bore 2 to the left m half-housing 1, and a radius bore 5, located on the gate 4.

In the closing mode, a handle 34 is mounted on the connecting shaft on the drive shaft 7. By rotating the drive shaft 7, the gate 4 is rotated on the axis 3 and is removed from interaction with the seats 26 and 27 at the location of the axial hole of the gate 4.

To display information about the position of the gate provided by the display system (see figure 4). It consists of a drive shaft 7 screwed onto the threaded part, a limb 35 and a pointer 36 mounted therein. When the drive shaft 7 rotates around the axis counterclockwise, the slide wheel is set to the “open” position with the help of a gear transmission so that its hole for a conditional passage becomes coaxial with holes 23 on the half-shells 1 and 9. When the shaft rotates, the limb 35 along the threaded part performs linear movement along the axis of the shaft. Together with the limb, the pointer 36 installed therein moves inside the slot 37 of an oval shape made in the cover 17. Near the extreme points of the slot marks are provided for the closing or opening position of the gate (view A in FIG. 4). If the position of the pointer 36 coincides with the corresponding mark on the slot 37, information about closing or opening the gate 4 is displayed.

With long-term operation of the valve, the lubricating properties of the oils may change for the worse, for example, their oxidation or the ingress of scale and mechanical particles. To remove mechanical particles on the periphery of the radius bore 5, pockets 21 are made in the body of the gate 4 for accumulating sediment.

Information sources

1. Pat. RF №2.246.652, M. cl. F16K 3/06; 27/04, publ. 02/20/2005, bull. No. 5.

2. Pat. RF №2.229.051, M. cl. F16K 3/06, publ. May 20, 2004

3. Pat. RF №2.286.499, M. cl. F16K 3/06, publ. 05/10/2006

Claims (1)

A butterfly valve, comprising a housing of two interconnected half-bodies, a gate with a toothed ring in a radius bore, mounted in the half-housing bore on the axis of rotation, with the possibility of interaction with the teeth of the drive shaft mounted on sliding bearings, characterized in that the device is equipped with a thrust bearing placed in a cylindrical bore of a half-shell and made in the form of a glass, on the outer cylindrical surface of which a series of longitudinal grooves are made, combined with transverse grooves, on its bottom with a conical bore inside, facing a large base of the cone to the drive shaft, at the end of which a hole is made and a ball is installed, with the possibility of interaction with the surface of the cone in the body of the thrust bearing, and pockets are made in the gate on the peripheral sections of the radius bore, and the sliding bearing placed inside the thrust bearing.

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