RU2375627C1 - Axial multi-purpose disk valve - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention refers to adjusting pipeline accessories and is designed for disk valves of medium and big diametres used in process lines of HS (heat stations), AS (atomic stations) and petrochemical production. The valve consists of fixed saddle (4) installed in case (1); the saddle has through profiled openings contacting with slide (5) made with notches; in cylinder (8) of the slide there is installed piston (9) with unloading chamber (12). Reinforcing rib (6) and support (7) are installed in case (1). Cover (13) of slide (5) contacts holding down device (14). Spindle (25) passes through cover (27) of case (1). The valve is equipped with a lever mechanism in form of lever (24) interacting with a universal hinge by means of pin (23); the universal hinge is made in form of three links (22, 20 and 16) and rod (18) connected between them with pins (21, 19 and 17 correspondingly) and secured on slide (5) with finger (15). Horizontal installation of spindle (25) is possible.

EFFECT: increased reliability of operation life of valve due to lever mechanism.

2 cl, 4 dwg

Description

The invention relates to the field of engineering, and more specifically to regulating valves of medium and large diameters, and can be used in disk valves to improve their performance, reliability and durability in various technological lines of thermal power plants, nuclear power plants and petrochemical production.

Currently, in power plants, valves and gate valves are widely used as regulatory bodies in pipelines of various types, which have different regulatory characteristics, but have unsatisfactory reliability, durability and tightness.

Known control disk valve with an unloading device (RU 51157 U1, IPC F16K 39/00 (2006.01), publ. 01/27/2006) containing a fixed seat installed in the housing with pass-through profiled peripheral windows and a central channel in contact with a spool made with cutouts , a spindle passing through a cover fastened to the housing, a spool cylinder in which a piston is mounted and forming an unloading chamber in communication with the drain cavity, grooves on the spool sealing surface forming together with the surface seats an intermediate chamber in communication with the discharge chamber and the Central channel of the seat, and an elastic element, while the seat, spool and piston are installed along the axis of the pipeline part of the housing, unloading is performed with one, two or more pistons, and the connection of the spool with the spindle is provided for turning the spool, made in the form of a gear.

A disadvantage of the known valve is the lack of reliability of its operation and fragility. This is due to the fact that the presence of a gear transmission, connecting the spool with the spindle, complicates the design, as it requires complex manufacturing technology of the gear and fine tuning. In addition, the gears of the gears are washed by a contaminated working medium, which leads to unreliability and short-lived valve operation.

The prototype closest to the claimed invention in terms of essential features is an axial locking and regulating disk valve with a discharge device (RU 2006128142 A, 8 IPC F16K 39/00 (2006.01), published on 02/10/2008, Bulletin No. 4), including the established in the housing there is a fixed seat with pass-through profiled peripheral windows in contact with a spool made with cut-outs, a spindle passing through a cover fastened to the body, a spool cylinder in which a piston is installed, located on the same axis with the spool a saddle along the axis of the pipeline part of the body, grooves on the sealing surface of the spool, forming, together with the surface of the saddle, an intermediate chamber, a gear set that can interact with the spool and the spindle and can be rotated by an angle of more than 90 °, in addition, the valve is equipped with stiffeners mounted along the axis of the body, one of which is fastened to the saddle by means of a fixing element, the other is connected with an emphasis, a protective lining installed in the drain cavity, a traverse with fixed in s presser in contact with the spool formed monolithic with the gear housing is equipped with, and the spindle is equipped with axial and radial bearings.

A disadvantage of the known valve is the lack of reliability of its operation and fragility. This is due to the fact that the presence of a gear transmission, which communicates the spool with the spindle, complicates the design of the valve, as it requires sophisticated gear manufacturing technology and fine tuning. In addition, the gears of the gears are washed by a contaminated working medium, which also leads to unreliability and short-lived valve operation.

The present invention solves the problem of increasing the reliability and durability of the axial locking-regulating disk valve by simplifying the design.

The problem is solved in that the axial locking and regulating disk valve, including a fixed seat mounted in the housing with through-pass profiled peripheral windows, in contact with a monolithic spool made with cutouts, a spool cylinder in which a piston is installed, located on the same axis with the spool and seat along the axis of the piping part of the housing, the grooves on the sealing surface of the spool, stiffeners, a clamping device in contact with the spool, the housing cover and spindle, according to the invention with abzhen lever mechanism connecting the spindle to the slide and designed as a firmly bonded with the spindle of the lever, by a pin interacting with a universal joint formed by at least three rod earrings and interconnected fingers and fixed on the spool by a pin.

The valve spindle is mounted horizontally in close proximity to the housing cover, and the lever mechanism connecting the spindle to the spool is made in the form of a lever rigidly fastened to the spindle, interacting by means of a finger with a rod fixed to the spool by means of a finger.

Due to the fact that the valve is equipped with a lever mechanism connecting the spindle to the spool and made in the form of a lever rigidly fastened to the spindle, interacting by means of a finger with a universal joint made of at least three earrings and a rod connected by fingers and fixed to the valve by means of a finger, the valve design is greatly simplified compared to the prototype. The lever and thrust are much simpler in manufacturing technology and more reliable in operation, which ensures reliability and durability of the valve. In addition, the working environment does not get into the rubbing surfaces of the fingers, which also ensures the durability and reliability of the valve. The location of the spindle horizontally makes it possible to reduce the number of elements of the lever mechanism, which simplifies the design, increases the reliability and durability of the valve. In addition, the location of the housing cover in close proximity to the horizontal spindle makes it possible to reduce the dimensions of the valve by reducing the size of the pipe and thus reduce the metal consumption and increase the reliability of the valve.

A comparative analysis of the identified technical solutions with the prototype allowed us to identify distinctive features, which proves the conformity of the claimed combination of features to the criteria of the invention of "novelty."

When searching for analogues and prototype, no technical solutions were found that are similar to the distinguishing features of the proposed solution, which proves the conformity of the claimed combination of features to the criteria of the invention “inventive step”.

The proposed axial locking regulating disk valve is illustrated by drawings:

- figure 1 shows a General view in section of an axial locking-regulating disk valve;

- figure 2 shows the location of the lever and thrust relative to the spool, section AA;

- figure 3 shows a General view in section of an axial locking regulating disk valve with a horizontal spindle;

- figure 4 shows the location of the lever and traction with a horizontal spindle, section BB.

The axial locking and regulating disk valve comprises a housing 1 (Fig. 1), a pressure 2 and a drain 3 cavity located in the pipeline part of the housing 1, a fixed seat 4 with throughput profiled peripheral windows for passing the controlled medium, a rotary disk monolithic spool 5 with cutouts. In the housing (Figs. 1 and 2), a stiffener 6 is mounted rigidly connected to the seat 4 and a support 7, which provides greater rigidity to the seat 4 and the tightness of the valve. The spool 5 (Fig. 1) has a cylinder 8 in which a piston 9 is located with a seal 10. A stop 11 connects the piston 9 to the support 7. Under the piston 9, a discharge chamber 12 is formed in the cylinder 8. The cover 13 of the spool 5 is in contact with the clamping device 14, ensuring that the spool 5 is pressed against the seat 4. On the cover 13 of the spool 5 there is a finger 15 connected to a hinge made of sequentially connected earrings 16, finger 17, rod 18, finger 19, earring 20 and finger 21. Finger 21 is connected to earring 22, in which the finger 23 of the lever 24. is mounted. The lever 24 is rigidly mounted on the spindle le 25. The spindle 25 with the sealing assembly 26 is installed in the cover 27 of the housing 1 and in the ball bearings radial 28 and the thrust 29 of the yoke 30. The spindle 25 is connected to the drive 31 through the coupling 32 and serves to transmit torque from the drive 31 to the spool 5 during regulation working environment. The drive 31 is fixed in the housing 1 by means of a yoke 30.

The presented valve can be made with horizontal installation of the spindle for transmitting torque. The cover 13 of the spool 5 (FIGS. 3 and 4) is connected via a pin 15 to a rod 18, which is connected via a finger 23 to a lever 24 mounted on the spindle 25. The spindle 25 is installed in the housing 1 and in the ball bearings of the yoke 30. The spindle 25 is connected to the drive 31 through the sleeve 32. A cover 27 is mounted on the housing 1.

Valve operation.

The drive 31 (figures 1 and 2) through the coupling 32 transmits the movement to the spindle 25, which rotates the lever 24. Then the movement is transmitted through the finger 23, the earring 22, the finger 21, the earring 20, the finger 19, the rod 18, the finger 17, the earring 16, finger 15 on the cover 13 of the spool 5, which, rotating, opens the windows 7 of the fixed saddle. The working medium from the pressure cavity 2 passes through the open part of the windows of the fixed seat 4 and enters the drain cavity 3. By rotating the spindle 25, the angle of rotation of the spool 5 is changed. Full opening of the valve is achieved when the windows of the spool 5 and the seat 4 are completely combined. Thus, the passage area is regulated overlapping windows. The clamping device 14 prevents the spool 5 from tearing off the seat 4. The chamber located above the piston 9 is connected to the pressure cavity 2. The discharge chamber 12 under the piston 9 is connected to the drain cavity 3 through a cylindrical slot of the stop 11. The working medium fills the space with different pressures. The resulting pressure drop is perceived by the stiffener 6 and the support 7.

When the spindle 25 is installed in the valve in the horizontal position (Figs. 3 and 4), the movement from the actuator 31 is transmitted through the clutch 32 to the lever 24, the pin 23 and the rod 18, which rotates the cover 13 with the spool 5 by means of the finger 15, which, rotating, opens fixed seat windows 4. Further valve operation is similar to the valve operation described in the “Valve Operation” section.

Thus, due to the peculiarities of the design and arrangement of the mechanisms connecting the spindle to the spool, the invention allows to ensure the reliability of the valve and the durability of its operation and, in addition, allows to reduce the dimensions of the valve and, therefore, its metal consumption.

Claims (2)

1. Axial locking and regulating disk valve, including a fixed seat installed in the housing with through-pass profiled peripheral windows, in contact with a monolithic spool made with cutouts, a spool cylinder in which a piston is installed, located on the same axis with the spool and seat along the axis of the pipeline part the housing, the grooves on the sealing surface of the spool, stiffeners, a clamping device in contact with the spool, the housing cover and spindle, characterized in that the valve is equipped with a lever a mechanism connecting the spindle to the spool and made in the form of a lever rigidly fastened to the spindle, interacting by means of a finger with a universal joint made of at least three earrings and traction connected by fingers, and fixed to the spool by means of a finger. 2. The axial locking and regulating disk valve according to claim 1, characterized in that the spindle is mounted horizontally, in close proximity to the housing cover, and the lever mechanism connecting the spindle to the spool is made in the form of a lever rigidly attached to the spindle, interacting with a finger with thrust fixed to the spool by means of a finger.

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