Shut-off valve

 

(57) Abstract:

The invention is intended for operation at high pressures of the working environment, reduce consumption where possible flutter shut-off organ. Shut-off valve includes a housing with inlet and outlet nozzles, provided with a locking rod body, forming with the walls of the shell inner cavity, and the device that opens the valve. The stem of the locking member provided with a conductive body. The valve body has an electromagnet mounted with the possibility of retaining the locking member in the end position when the open valve. The invention allows for reliable retention of the locking member in the open position to prevent self-oscillation when changing the fluid flow. 5 C.p. f-crystals, 2 Il.

The invention relates to the field of engineering, more narrowly to shut-off valves installed on various roads, pipelines and other communications, and more particularly to a shut-off valve pilot type operating at high pressures of the working environment, reduce consumption where possible flutter shut-off organ.

The invention can find application in wide ranging technical the known shut-off valves, comprising a housing with inlet and outlet nozzles and provided with a locking rod body, forming with the walls of the housing internal cavity, and the device that opens the valve (see, for example, and.with. 165623, CL F 16 K 31/02, 1964).

This valve does not have a device that provides reliable retention of the locking member in the open position and cannot provide technical result achieved by the invention.

Also known shut-off valves, comprising a housing with inlet and outlet nozzles and provided with a locking rod body, forming with the walls of the casing internal cavity connected to the control authority, which, in turn, is connected with the outlet pipe (see RF patent 2160405, CL F 16 To 31/02, 1998)

This valve is selected for the prototype, as more perfect.

The technical result set by the invention, this valve is not achieved, because it also does not include provisions for secure retention of the locking member in the open position.

The objective of the invention is the creation of a shutoff valve, operating at high pressures of the working environment, mainly built on the pilot scheme or with manual Pref is CLASS="ptx2">

The technical result of the invention is to ensure reliable retention of the locking member in the open position to prevent self-oscillation when changing the flow rate of the working environment.

This technical result is achieved by the fact that in the shut-off valve, comprising a housing with inlet and outlet nozzles and provided with a locking rod body, forming with the walls of the shell inner cavity, and the device that opens the valve, the stem of the locking member provided with a conductive body, and the body of the valve has an electromagnet mounted with the possibility of retaining the locking member in the end position when the open valve.

In special cases this technical result is achieved that the device that opens the valve, made in the form of the governing body, is connected to the internal cavity and to the outlet nozzle, the device that opens the valve, made in the form of a manual drive device to return to its original position; the valve can be made vertical, and the electromagnet is installed in the housing cover, the stem of the shut-off body in the form of console, and the conductive body is installed on the console to the opposite location of the main stem, and kinematically associated with an eccentric drive shaft, and the device to return to its original position is executed in the form located on the secondary shaft compression spring, is installed with the possibility of impact on the eccentric drive.

In Fig. 1 illustrates schematically described shut-off valve, in which the device for opening the valve is made in the form of the governing body; Fig.2 - the same valve device to open it in the form of a manual actuator.

Shut-off valve includes a housing 1 with a cover 2, which is also a part of the body. The body is made saddle for 3 shut-off body 4 made in the form of a figured glass, having on the side surface of the discharge hole 5, the valve has a return spring 6, clamped shut-off body 4 to the seat 3. Wall of the housing 1 to form an internal cavity 7. The inner cavity 7 of the locking body has a piston rod 8, is made in the form of a console, which is fixed to the conductive body 9. In the body, mainly in the cover 2, a solenoid 10. The housing 1 has an input 11 and output 12 pipes. The inner cavity 7 through the pipe 13 connected with the governing body 14, which contains prostota 17, with the saddle 18 and the diverter body 19, and a return spring 20. The pipes 13 and 16 are connected in the bypass line 21 with a valve 22. Manual actuator (see Fig.2) made in the form of additional rod 23 adjacent to the locking body from the side opposite to the main shaft 8. The rod 23 is kinematically connected with the eccentric drive shaft 24. The manual actuator is the device to return to its original position, made in the form located on the secondary shaft 23 of a spring 25 that is installed with the possibility of impacts on the Cam 26, the drive shaft 24, having a handle 27. The inner cavity 7 is connected with the outlet pipe by a pipe 28 having a valve 29.

Shut-off valve operates as follows.

A) For the option with the managing authority.

When de-energized the electromagnet 10 and the electromagnetic actuator 17 under the action of the spring 6 lock body 4 placed on the saddle 3 and the diverter body 19 overlaps the pipeline 16. In the cavity 7 is set to a pressure equal to the pressure of working medium in the inlet pipe 11. In the outlet port 12 to the output pressure of the working environment is below the pressure in the pipe 11. The shutoff valve is closed.

When the electromagnet 10 and the actuator 17 by a pipe 12 To the locking body 4 will be affected by the pressure of working medium, located in the pipe 11. Shut-off body will take the extreme position when you open the valve. Conductive body 9 under the influence of the electromagnet will be tight together with the shut-off body) is pressed against the electromagnet 10 due to, respectively, the calculated power of the electromagnet. The valve is open. When opening the shut-off organ of the electromagnetic actuator 17 can be turned off.

As can be seen from the description of work, in emergency situations, for example, failure of power supply, the check valve closes automatically.

C) For manual valves.

In the closed position of the shut-off body 4 will act on the spring 6, pressing it to the seat 3. The valve 29 is closed. The pressure in the cavity 7 will be equal to the pressure in the pipe 11. To open valve open valve 29 and by means of the handle 27 is driven by a drive shaft 24, which is acting on the rod 23, moves the shut-off body 4 in the extreme position. After locking the body will take the extreme position, the shutoff valve is open.

Effects on the handle 27, and hence on the shaft 24 and the additional rod 23 is terminated. This spring 25 communicates through a rod 23 with a Cam 26, resulting in additional stock lowers the t spring 6, pressing it to the seat 3. The pressure in the cavity 6 and the pipe 12 causes the force, tightly clamping the locking body 4 to the seat 3, producing a sealing shut-off organ.

The need for the use of the electromagnet 10 and the conductive body 9 is explained as follows.

A stop valve is held open due to the pressure difference between the pressure of the working medium in the inlet valve and outlet valve, i.e., holding a stop valve pressure drop is equal to the hydraulic losses in the path of the valve. By reducing fluid flow through the valve, these hydraulic losses are reduced, is reduced and the force holding the valve in the open position. The valve under the action of return spring begins to close, increasing the hydraulic losses. Further, when reducing the fluid flow through the valve, this pressure leads to autocleaner shut-off organ, which in some cases may lead to its closure. The dense pressure of the locking member to the electromagnet completely eliminates the described phenomena.

Currently developing a prototype of the described valve.

1. Shut-off valve, containing an internal cavity, as well as a device that opens the valve, characterized in that the locking rod body provided with a conductive body, and the body of the valve has an electromagnet mounted with the possibility of retaining the locking member in the end position when the open valve.

2. Shut-off valve under item 1, characterized in that the device that opens the valve, made in the form of the governing body, is connected to the internal cavity and the outlet nozzle.

3. Shut-off valve under item 1, characterized in that the device that opens the valve, made in the form of a manual drive device to return to its original position.

4. Shut-off valve under item 1, characterized in that the valve is made vertical, and the electromagnet is installed in the housing cover.

5. Shut-off valve under item 1, characterized in that the stem of the shut-off body in the form of console, and the conductive body is installed on the console end.

6. Shut-off valve under item 3, wherein the manual actuator is made in the form of additional stock, adjacent to the locking body from the side opposite the location of the main stem, and kinematically associated with exoi for extra rod compression spring, installed with the possibility of impact on the eccentric drive.

 

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