Regulating disk valve with relief device

FIELD: mechanical engineering.

SUBSTANCE: proposed disk valve contains stationary seat with through shaped peripheral ports and central channel installed in housing. Seat is arranged between spool and piston. Spool and piston are nondetachably connected by rod through central hole of seat. Cylinder arranged in housing separates drain and pressure spaces of valve.

EFFECT: improved reliability of valve.

1 dwg

 

The invention relates to the field of engineering, namely, regulating valves, and can be used in valves disc type flow control and shut off the flow of liquid or gaseous media in different production lines.

The reliability of valves on pipelines determines the reliability, stability valves and affects the economic performance of production lines.

Known floating disk valve, comprising a housing with a saddle, a spindle connected with flat swivel regulatory element located in the input cavity of the housing, and handling tool, made in one piece with the spindle, the area of cross-section of the shaft end receiving the input pressure is greater than or equal to the square of the regulatory element in the cross section (EN, No. 2079028 C1, CL R 16 To 39/04, op. 10.05.97 year).

A disadvantage of the known valve is that the bandwidth it directly depends on the size of the regulatory element. This is because the discharge means made in one piece with the spindle and to ensure that the efforts of the unloading valve cross-sectional area of the spindle in the area of the seal shall not be less than the cross-sectional area of the regulating element, which leads to mean gnome increasing loads on the support site and as a consequence, to decrease in the reliability of the valve. In addition, with increasing size of the spindle and a regulating element increases the size and weight of the valve and, consequently, increases its intensity.

Known regulatory disk valve with unloading device, which contains the set housing fixed saddle with bandwidth profiled peripheral Windows and a Central channel in contact with the spool, made with cutouts and connected with the spindle attached to the housing cover, the cylinder which has a piston, narashima connected with the spool, pie grooves on the sealing surface of the valve, forming together with the surface of the seat intermediate chamber is in communication with the Central channel of the saddle (EN, No. 2099623 C1, class F 16 K 39/04, op. 20.12.97 year).

However, the rigid connection of the cylinder cover and the location therein of the piston narashima connected to the valve, perpendicular to the surface of the saddle, due to technological problems to ensure their alignment and perpendicularity. Typically, the piston is sticking in the cylinder or the valve is biased to the surface of the saddle. It is impossible to provide a simultaneous vertical movement of the piston in the cylinder to create unloading and turning of the valve in a horizontal plane about the simultaneous provision of sealing surfaces, located on the different elements, which leads to increased leakage between the valve and seat, reduces the efficiency and reliability of the valve.

In the process of regulation possible lifting or separation of the valve from the seat under the action of pressure from the discharge cavity or contact with solids, which leads to deregulation and depressurization valve.

The problem to which this invention is directed, is to increase the reliability of the valve due to more rational design.

To achieve the technical result in regulatory disk valve with unloading device, which contains the set housing fixed saddle with bandwidth profiled peripheral Windows and a Central channel in contact with the spool, made with cutouts and connected with the spindle attached to the housing cover, the cylinder which has a piston, narashima connected with the spool, pie grooves on the sealing surface of the valve, forming together with the surface of the seat intermediate chamber is in communication with the Central channel of the saddle, optional saddle located between the valve and the piston, narashima United through the Central hole of the saddle by means of the rod, and the cylinder is the case and based on separate treatment of the t drain and discharge valve.

Distinctive features of the proposed control valve from the above known closest to him, is that the saddle is located between the valve and the piston, narashima United through the Central hole of the saddle by means of the rod, and the cylinder is located in the housing and separates the drain and discharge valve.

The cylinder in the valve body, a direct connection of the pressure and drain cavities with cylinder simplifies the technology of manufacturing and repair of the valve, increases accuracy, as the piston and seat are in one part, which increases the valve's service life and reliability.

The location of the seat between the valve and the piston allows you to place the cylinder in the housing and thereby provide a discharge valve with the piston located in the cylinder, which increases the reliability of the valve.

The permanent connection of the valve and piston through the rod allows you to create a rigid structure and to ensure a tight fit of the valve to the seat and the free movement of the piston in the cylinder smoothly and distortions due to the location of the piston and seat in one part of the body, which increases the reliability of the valve.

The presence of cavities formed by the piston and the cylinder, and connecting them to the pump and drain valve cavities allows you to create unloading zo is etnica due to pressure differential between pressure and drain cavities.

The invention is illustrated by drawings, where:

figure 1 shows the described control valve with unloading device;

figure 2 - view of the valve seat in the open and closed positions.

Regulatory disk valve with unloading device includes a housing 1 (see figure 1), a head 2 and the drain 3 of the cavity, the saddle 4, the rotary slide valve 5 with cutouts (see figure 2). Seat 4 provided with a profiled Windows 6 (see figure 2) for passing a controlled environment, and channel 7. Box 6 of the seat 4 and the notches on the spool 5 with their combination reported pressure 2 and the drain 3 of the body 1. The spool 5 is rigidly connected to the piston 8 by means of the rod 9. The piston 8 is located in the hole 10 of the cylinder 11, the components with the housing 1 one. The cavity 12 formed by the surface of the cylinder and the bottom surface of the piston, is connected with the pressure cavity 2. The cavity 13 formed by the surface of the cylinder and the upper surface of the piston, is connected with the drain cavity 3. The spool 5 narashima connected by means of a coupling 14 with the spindle 15 mounted in the cover 16 and passing through its Central hole. The spindle 15 is used to transmit torque from the actuator (not shown) to the valve 5 in the regulatory process. The cross-sectional area of the piston 8 to ensure that the efforts of the discharge is determined on the basis that the force unloading, set up, if appropriate is my difference of pressure between the cavities of the valve, do not exceed the efforts of the pressure valve 5. Between the surfaces of the seat 4 and the valve 5 is formed intermediate chamber 17. Channel 7 seat 4 connects the intermediate chamber 17 to the drain cavity 3.

The valve operates as follows.

In the “closed” position (see figure 2) slide valve 5 is overlapped with the window 6 of the seat 4. The spool is pressed against the seat by the pressure P1the working environment of the cavity 2. The working medium pressure in the intermediate chamber 17 is equal to the pressure P2in the drain cavity 3. The working environment is not supplied to the drain cavity. The valve is closed. The pressure difference (P1-P2in the pressure cavity 2 and the drain cavity 3, multiplied by the difference between the active area of the spool 5 and the area of the piston 8, creates a force which presses the valve seat 4, and provide an unloading valve.

To bring the valve in the “open” position, the actuator rotates the spindle 15 and connected narashima with him through the clutch 14 and the valve 5 so that the cut valve 5 are aligned with the Windows 6 of the seat 4, forming a through passage. Pressure cavity 2 is connected with the drain cavity 3. The working medium under pressure P1from the pressure cavity 2 of the housing 1 comes through the window formed in the drain cavity 3. The rotation of the spindle 15 change the angle of rotation of the spool 5. The spool 5 rotates, gradually opens the window 6 of the seat 4. Full opening of the valve is achieved by the ri full combination of Windows 6 with cutouts of the spool 5. Thus, rotation of the valve to regulate the area of the bore of overlapping Windows.

To close the valve overlap of the Windows 6 of the seat 4 is in the reverse order. The spindle motor 15 rotates the spool 5 so that it is located above the Windows 6 of the seat 4.

Thus, due to the peculiarities of execution of the unloading device, the invention improves the reliability and stability of the valve, the manufacturability of its manufacture, to increase the service life and to reap the economic benefits by reducing operating costs for the replacement of worn parts, to keep the overall dimensions and weight of the device.

Regulatory disk valve with unloading device, which contains the set housing fixed saddle with bandwidth profiled peripheral Windows and a Central channel in contact with the spool, made with cutouts and connected with the spindle attached to the housing cover, the cylinder which has a piston, narashima connected with the spool, pie grooves on the sealing surface of the valve, forming together with the surface of the seat intermediate chamber is in communication with the Central channel of the saddle, characterized in that the saddle is located between the valve and the piston, narashima United through prices the Central seat hole through the stem, when this cylinder is located in the housing and separates the drain and discharge valve.



 

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