RU1809896C - Shutoff-control device - Google Patents

Abstract

SUMMARY OF THE INVENTION: In a cylindrical guide chamber, an operating member is provided, consisting of an elastic locking element mounted on a spindle. The chamber is 1.4 times larger in diameter than the diameter of the inlet pipes. The working body is provided with a guide disc and a round adjusting nut and is installed with the possibility of dividing the chamber into upper and lower parts. 2 silt

Description

The invention relates to valve engineering and may find application in housing and industrial construction, in various industries and in agriculture for main and distribution pipelines for general heating and water supply.

This goal is achieved by the fact that in the known locking device comprising a housing with a passage channel and inlet pipes, the mechanism for moving the working body is perpendicular to the medium flow, a cylindrical guide chamber with a working body located in it, consisting of an elastic locking element mounted on the spindle according to the invention, the cylindrical guide chamber is 1.4 times larger in diameter than the diameter of the inlet pipes, and the working body is further provided with a guide disk and with a round adjusting nut and installed with the possibility of dividing the chamber into upper and lower parts. The locking element of the working body is made in the form of two. external cuff with an internal cavity

and mounted on a spindle between a guide disc and a circular adjusting nut which is equal in diameter to the diameter of the guide chamber. A channel is made in the spindle in the form of a longitudinal and two transverse openings, the inner cavity of the locking member and the passage channel are connected by one of the transverse holes, and the upper part of the chamber and the passage channel are connected by another transverse hole with a valve installed therein.

Figure 1 shows a frontal porno-regulatory device; Fig. 2 is a horizontal section through the axis of the inlet pipes.

The proposed locking and regulating device consists of a housing 1, in which there are supply pipes 2 of diameter and a guide chamber 3 of diameter d, in which a working member 5 is installed on the spindle 4, consisting of a guide disc 6, a locking element 7 and an adjusting nut 8.

The guide disk 6 and the adjusting nut 8 are guides for the working body 5 and have a diameter equal to

with

with

8

about

00

oh oh

W

the diameter O of the guide chamber 3. To ensure effective sealing, the locking element 7 is made of an elastic-elastic material in the form of a double-sided cuff with an internal cavity 9. Rubber, polyurethane, and the like can be used as the elastic-elastic material. In order to more effectively lock and extend the life of the locking element 7, its diameter D is 1.4 times larger than the diameter d of the supply pipes 2. The proposed diameter ratio, 4d, is determined by the possibility of reusing the locking element in case of wear of its working surfaces.

The working member 5 divides the guide chamber 3 with respect to the supply pipes 2 into the upper 10 and lower 11 parts. A channel is made in the spindle 4, consisting of a longitudinal hole 12, a transverse hole 13 and a transverse hole with a valve 14.

Seals 15 and a cover 16 are mounted on the housing 1, on which the mechanism 17 of the reciprocating movement of the spindle 4 with the working body 5 is fixed. The proposed device provides a smooth control of the flow rate of the working medium from the open position when the working body is located at the extreme upper point to the closed position when the working body is located at the extreme lower point.

The operation of the locking and regulating device is as follows:

1. In the open position, the operating member 5 in the guide chamber 3 is at its highest point. The passage between the supply pipes 2 is completely open and the flow of the working medium moves through the device with minimal (for the device) resistance. In this case, the working medium through the holes 12 and 13 in the spindle 4 fills the internal cavity 9 of the locking element 7, the valve 14 does not pass the working medium to the upper part 1, the guide chamber 3.. The pressure of the working medium in the flow and the pressure of the working medium in the internal cavity 9 are equal. Under the influence of the pressure of the working medium in the inner cavity 9, the walls of the shut-off element 7 are deformed and fit more tightly against the walls of the guide chamber 3, which reduces the likelihood of the penetration of the working medium into the upper part 10 of the guide chamber 3.

2. In the process of regulation, the mechanism 5 moves the working body 5 along the guide chamber 3. The working body 5 partially blocks the flow of the working medium

on the nozzles 2 and creates local resistance. A pressure drop occurs in the local resistance zone, as a result of which the pressure in the inner cavity 9 of the locking element 7 decreases and its walls are deformed, which reduces friction when the working body 5 moves along the guide chamber.

3. In this case, partial overflow of the working medium from the internal cavity 9 into the moving flow is possible. As soon as the shut-off element 7 shuts off the flow, a certain volume of the working medium is cut off in the lower part 11 of the guide chamber 3

5 environments. Further movement of the working body 5 leads to the fact that the working medium from the lower part 11 of the guide chamber 3 through the holes 12 and 13 in the spindle 4 flows into the internal cavity 9 of the shut-off

0 of the element 7, the pressure in the inner cavity 9 increases, the walls of the locking element 7 deform and fit snugly. to the surfaces of the guide chamber 3. which provides a dense overlap of the supply pipes 5 2, i.e. complete locking of the flow of the working environment.

4. During the operation of the locking and regulating device, the possibility of penetration of the working medium into

0 the upper part 10 of the guide chamber 3. Consider the case when the upper part 10 of the guide chamber 3 is filled with a working medium (liquid), the working body 5 is at the extreme lower point and

5 it is necessary to translate it into position openly. When moving the working body 5 up, at the same time there is a decrease in the volume of the upper part 10 and an increase in the volume of the lower part 11 of the guide

0 chamber 3. A decrease in the volume of the upper part 10 leads to an increase in the pressure of the working medium in it, as a result of which part of the working medium through the valve 14 flows through the hole 12 into the lower part 11 of the 5th control chamber 3, where the volume increases and the working pressure drops Wednesday.

Thus, when moving the working body 5 to the upper point occurs

0 release of the upper part 10 of the guide chamber 3 of the working medium. Leak of the working medium from the upper part 10 of the cover 16 excludes the seal 15.

5. Consider the case of repair of the proposed locking and control device. The surface areas of the locking element 7, conjugated by the supply pipes 2, are most confirmed to wear. Moreover, the breaking element breaks along its height on a cylindrical surface symmetrically against each supply pipe. The width of one wear section of the cylindrical surface of the locking element is defined by a chord equal to the diameter of the inlet pipe. The surface portions of the closure member in contact with the walls of the guide chamber wear less. Thus, the working surface of the locking element, as it were, conditionally consists of four sections, of which two opposite ones have more wear and two others less. Moreover, the proposed device design provides that the diameter of the shut-off element is 1.4 times larger than the diameter of the inlet pipe, i.e. all four sections of the surface of the locking element are equal to each other.

In this regard, during the repair of the locking-control device, the cover 16 is removed, the working element 5 is removed from the guide chamber 3, the adjusting nut 8 is removed and the locking element 7 is rotated 90 ° about its axis. After that, the adjusting nut 8 is twisted, which, when moving along the spindle 4, deforms the locking element 7, as a result of axial compression, the locking element increases its diameter. The adjusting nut 8 is moved until the locking element provides a tight fit 6 of the guide chamber 3.

After setting the adjusting nut 8 in the required position, the locking and regulating device is assembled and is ready for further operation.

6. In case of complete wear of the locking element 7, it is replaced with a new one. In this case, the housing 1 with the guide chamber 3 practically does not wear out and can be used for a long time.

The proposed technical solution of the locking and regulating device in comparison with the prototype has the following advantages:

simplified design;

the regulation of the flow rate of the working medium at a lower resistance is ensured;

increased reliability and durability;

reversibility of use of the device in pipelines.

Claims (1)

SUMMARY OF THE INVENTION A locking and regulating device comprising a housing with a passage channel and supply nozzles, a mechanism for moving the working body perpendicular to the medium flow, a cylindrical guide chamber with a working body located therein, consisting of an elastic locking element mounted on a spindle, characterized the fact that the cylindrical guide chamber is 1.4 times larger in diameter than the diameter of the inlet pipes, and the working body is additionally equipped with a guide disc and a circular adjustment with a nut and is installed with the possibility of dividing the chamber into upper and lower parts.