RU2762468C1 - Axial shut-off and control valve - Google Patents

Abstract

FIELD: control devices.

SUBSTANCE: invention relates to a pipeline control valve designed to cut off the flow and regulate the flow rate or pressure of a working medium; it can be used in any industry. A shut-off and control valve contains rectilinear tubular case (1) with inlet (2) and outlet (3) nozzles and radial hole (4), and shut-off and control device (6), which includes: hollow case (7) of the shut-off and control device installed coaxially inside tubular case (1) and having a closed end part and radial holes (8) on the side of outlet pipe (3) for the medium to exit into a cavity of tubular case (1); a shut-off and control element in the form of sleeve (9) installed coaxially inside case (7) of the shut-off and control device with the possibility of passage through its cavity of the medium and progressive movement inside the case of the shut-off and control device along its axis, while on the side of outlet pipe (3), sleeve (9) has a closed end part and radial holes (10) for the exit of the medium into the cavity of the tubular case, placed with the possibility of combining with radial holes (8) of case (7) of the shut-off and control device; and drive element (12) for moving the sleeve, located in radial hole (4) of tubular case (1). Case (7) of the shut-off and control device has first area (7a), which is adjacent to a wall of tubular case (1), and second area (7b), which is placed with a gap relatively to the wall of tubular case (1), forming a channel for the passage of the medium, while radial holes (8) of case (7) of the shut-off and control device are made in its second area (7b). Drive element (12) is rigidly connected to sleeve (9) or connected to the outer part of the sleeve by means of a gear transmission.

EFFECT: invention is aimed at improving the accuracy of regulation, reducing the required power for regulation, reducing pressure losses in the valve, simplifying the design, reducing wear of elements, reducing weight and size characteristics, as well as improving the reliability and service life of equipment.

5 cl, 1 dwg

Description

[01] Technical field

[02] The invention relates to pipeline valves designed to cut off the flow and regulate the flow rate or pressure of the working medium and can be used in pipelines for various purposes when pumping various types of media in any industry.

[03] State of the art

[04] The closest analogue from the point of view of the principle of controlling the flow rate of the medium is the shut-off and control valve described in US patent US 5490535, 13.02.1996. The specified device contains a rectilinear tubular body with inlet and outlet pipes and a radial hole, as well as a locking and regulating device. The locking and regulating device contains a movable control element located inside the housing with the possibility of axial movement, a stationary sleeve installed inside the control element and having radial holes for the medium outlet, as well as an actuator drive located in the radial hole. When the control element is moved along the axis of the housing, the flow of the working medium is regulated by opening or closing the radial holes of the sleeve.

[05] This analogue has a number of disadvantages associated with low reliability, design complexity and manufacturing technology, and low control accuracy. For example, the use of a stationary bushing and a massive movable actuator around it increases the overall weight and necessitates an increase in control power. In addition, such a structure is more complex and laborious to manufacture.

[06] Disclosure of the invention

[07] The technical problems to be solved by the claimed invention are the complexity of the design and manufacturing technology of the product, low reliability and durability of the equipment, high power during regulation, opening and closing, low speed and accuracy of valve regulation, as well as high pressure losses.

[08] The technical result of the invention is to increase the accuracy of regulation, reduce the required power for regulation, reduce pressure losses in the valve, simplify the design, reduce wear of elements, reduce the weight and size characteristics, as well as increase the reliability and service life of the equipment.

[09] The specified technical result is achieved in the invention due to the fact that the shut-off and control valve contains a straight tubular body with inlet and outlet nozzles and a radial hole, and a shut-off and control device with a translational shut-off and control element. The locking and regulating device includes: a hollow body of the locking and regulating device, installed coaxially inside the tubular body and having a closed end part on the side of the outlet pipe and radial holes for the medium to exit into the cavity of the tubular body; a hollow sleeve installed coaxially inside the body of the shut-off and control device with the possibility of passing through its cavity of the medium and translational movement inside the body of the shut-off and control device along its axis, while on the side of the outlet pipe the sleeve has a closed end part and radial holes for the outlet of the medium, located with the possibility of being combined with the radial holes of the shut-off-regulating device body; and a sleeve moving drive housed in a radial opening of the tubular body. In this case, the body of the shut-off-regulating device has a first region that adjoins the wall of the tubular body and a second region that is located with a gap in relation to the wall of the tubular body, which forms a channel for the passage of the medium, and the radial openings of the body of the shut-off and control device are made in its second area.

[010] In addition, in order to achieve the technical result, particular embodiments of the invention are provided, according to which:

[011] - a recess is made in the wall of the tubular body from the inner side at the location of the second region of the body of the locking and regulating device;

[012] - the sleeve adjoins the wall of the housing of the locking and regulating device, while between the sleeve and the housing of the regulating device are the assemblies of the seal and sliding bearings;

[013] - an unloading channel (11) is made in the closed end part of the sleeve to equalize the pressure;

[014] - the drive element is rigidly connected to the sleeve;

[015] - the drive element is connected to the sleeve by means of a gear transmission;

[016] - the body is made in one piece.

[017] In contrast to analogs in which regulation is carried out by translational movement of the hollow shut-off and control element, the design under consideration uses a movable sleeve located inside the body of the shut-off control device and moving along the flow axis, which allows to reduce the weight of the structure and reduce power, necessary for regulation. At the same time, the design provides a radial outlet of the working medium from the sleeve into the cavity of the body through the aligned holes, which increases the control accuracy, and also reduces pressure losses by reducing the resistance to the movement of the working medium. In addition, this leads to a decrease in the degree of wear of both the moving elements of the device and the seals. As a result, the reliability and durability of the equipment is increased, the control accuracy is increased and the drive power is reduced. Also, the design of the device is easy to manufacture and maintain.

[018] Brief Description of the Drawings

[019] The invention is illustrated by the figure, which shows a schematic sectional view of the claimed reinforcement.

[020] Structural elements are designated in the figures by the following reference numbers:

1 - case,

2 - inlet branch pipe of the body,

3 - body outlet branch pipe,

4 - radial hole of the body,

5 - recess in the wall of the case,

6 - locking and regulating device,

7 - the body of the locking and regulating device,

7a - the first area of the body of the shut-off and control device,

7b - the second area of the valve body,

8 - radial holes in the body of the locking and regulating device,

9 - sleeve,

10 - radial holes of the liner

11 - unloading channel of the sleeve,

12 - sleeve drive element,

13 - seal assembly.

[021] Implementation of the invention

[022] The claimed device is an axial shut-off and control valve of reciprocating action.

[023] The valve includes a tubular body (1) and a shut-off and control device (6) located therein.

[024] The body (1) is straight and has inlet (2) and outlet (3) nozzles. In the context of this application, inlet and outlet nozzles are understood to mean body parts with inlet and outlet openings, respectively. In the middle part of the body (1), a radial hole (4) is made from above to transmit movement to the locking and regulating device (6). The housing (1) is preferably made in one piece, which improves reliability and simplifies assembly of the device. In this case, it is also possible to make the body of a prefabricated structure.

[025] The shut-off device (6) includes a shut-off device body (7), a movable sleeve (9) and a drive element (12).

[026] The body (7) of the locking and regulating device is made in the form of a hollow element, installed coaxially inside the tubular body (1) of the valve. In this case, the body of the shut-off and control device (7) has an open end on the side of the inlet (2) (left side in the figure) for the pumped medium to pass through, and on the side of the outlet (3) (right side in the figure) a closed end, through which Wednesday does not pass. Said body (7) preferably consists of two regions: the first region (7a), which is adjacent to the wall of the tubular body (1) and the second region (7b), which is spaced with respect to the wall of the tubular body (1). In this case, radial holes (8) are made in the second region (7b) of the housing (7) of the locking and regulating device. Thus, the gap between the tubular body (1) and the body (7) of the shut-off device in the second region (7b) forms a channel for the medium to pass through. To form the specified gap in the wall of the tubular body (1), an annular recess (5) can be made, which forms a channel for the medium outlet. The depression (5) can have, for example, a spherical or any other profile. In another possible embodiment of the invention, to form the specified gap, the second region (7b) of the housing (7) of the regulating device can be made tapering (for example, conical).

[027] The sleeve (9) is made in the form of a hollow element, installed coaxially inside the body (7) of the shut-off device. In this case, the sleeve (9), as well as the body (7) of the locking and regulating device, has an open end part on the side of the inlet pipe (2) for the pumped medium to pass through, and on the side of the outlet pipe (3) - a closed end part, through which Wednesday does not go through.

[028] The outer surface of the sleeve (9) bears against the wall of the body (7) of the shut-off device, while between them is placed an assembly of seals and plain bearings (13) to seal the radial bore (4) of the body (1), and to enable translational displacement of the sleeve (9) inside the housing (7) of the locking and regulating device along its axis. The seal and sleeve bearing assembly (13) can include separate seals and bearings or a single seal and bearing housing.

[029] The sleeve at the point of contact with the second region (7b) of the body (7) of the shut-off device also contains radial holes (10) for the medium outlet, which can be aligned with the radial holes (8) of the body (7) of the shut-off device ... Radial holes (10) and (8) can have different shapes and configurations and are made, for example, in the form of grooves, slotted holes, windows, perforations, etc.

[030] In the closed end part of the liner (9), a relief channel or holes (11) are preferably provided to ensure pressure equalization when regulating the flow of the medium.

[031] The drive element (12) is installed in the radial hole (4) of the housing (1) to transmit the translational motion to the sleeve (9). The specified element, in particular, can be a protrusion rigidly connected with the sleeve (9). It is also possible to make the specified element in the form of a gear wheel, which is in engagement with a toothed section made on the outer part of the sleeve (9). Other mechanisms known to the person skilled in the art can also be used to transfer the translational motion from the element (12) to the sleeve (9). The drive element (12) can be driven by manual and other types of actuators.

[032] The claimed reinforcement operates as follows.

[033] In the open position, the radial holes (10) of the sleeve (9) are completely aligned with the radial holes (8) of the body (7) of the shut-off device and the pumped medium passes from the inlet (2) through the cavity of the sleeve (9), radial holes (10) and (8) and a channel formed by the gap between the second region (7a) of the housing (7) of the regulating device to the outlet (3).

[034] When the actuator is turned on, the drive element (12) moves the sleeve (9) along the axis of the housing (7) (in the figure to the left) and the flow area begins to decrease, regulating the flow rate of the working medium. In the closed position, the radial holes (10) and (8) are completely closed by the walls of the sleeve (9) or the body (7), which leads to a shutdown of the flow of the working medium. In this case, the seal assembly (13) prevents the fluid from leaking through the radial hole (4) and the contact surface of the sleeve (9) with the body (7) of the locking and regulating device. If excessive pressure occurs, it is equalized through the relief channel or hole (11).

[035] The proposed design has the following advantages:

[036] - simplifies the design by simplifying the shape of the body and other elements;

[037] - reduced weight and dimensions, in particular, due to the use of a movable sleeve installed inside the body of the shut-off and control device (and not outside, as in the closest analogue) and an improved valve design;

[038] - simplifies the assembly and operation of the valve due to the simpler shape of the body;

[039] - increased reliability and service life of the equipment due to the simplification of the design and the fact that the working medium flows axisymmetrically to the valve, through streamlined channels and does not come into contact with the surface of the seals;

[040] - the control accuracy increases, the control power decreases due to the streamlined internal shapes of the unloaded control device and the use of a liner as a control element, driven through a radial hole without the use of spindles and other additional elements.

Claims (10)

1. Shut-off and control valves containing a straight tubular body (1) with inlet (2) and outlet (3) nozzles and a radial hole (4), and a shut-off and control device (6) having a shut-off and control element made with the possibility translational axial movement, characterized in that the locking and regulating device (6) includes: - a hollow body (7) of a locking and regulating device, installed coaxially inside the tubular body (1) and having a closed end part on the side of the outlet pipe (3) and radial holes (8) for the medium to exit into the cavity of the tubular body (1), - a shut-off and control element in the form of a sleeve (9) installed coaxially inside the body (7) of the shut-off and control device with the possibility of passing through its cavity of the medium and translational movement inside the body of the shut-off and control device along its axis, while from the side of the outlet ( 3) the sleeve (9) has a closed end part and radial holes (10) for the medium to exit into the cavity of the tubular body, placed with the possibility of alignment with the radial holes (8) of the body (7) of the locking and regulating device; and - a drive element (12) for moving the sleeve, located in the radial hole (4) of the tubular body (1), the body (7) of the locking and regulating device has a first region (7a), which is adjacent to the wall of the tubular body (1) and a second region (7b), which is located with a gap with respect to the wall of the tubular body (1), which forms a channel for the passage of the medium, while the radial holes (8) of the housing (7) of the locking and regulating device are made in its second area (7b), moreover, the drive element (12) is rigidly connected to the sleeve (9) or connected to the outer part of the sleeve by means of a gear transmission. 2. An armature according to claim 1, characterized in that a recess (5) is made in the wall of the tubular body (1) on the inner side at the location of the second region (7b) of the body (7) of the shut-off-regulating device. 3. Armature according to claim 1, characterized in that the sleeve (9) adjoins the wall of the body (7) of the locking and regulating device, while between the sleeve (9) and the body (7) of the regulating device are the assemblies of seals and plain bearings (13 ). 4. The valve according to claim 1, characterized in that a discharge channel (11) is made in the closed end part of the sleeve (9) to equalize the pressure. 5. Armature according to claim 1, characterized in that the body (1) is made in one piece.

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