RU2464469C2 - Shutoff and control gate valve - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: shutoff-control gate valve can be used in oil and gas industry and other industries. Shutoff-control gate valve includes flat damper controlled with spindle and interacting on both sides with the seats arranged in supply and discharge branch pipes. The seat which is arranged in discharge branch pipe consists of set of throttle plates in which each plate which is the next one in the direction of the carried medium is installed mirror-like in relation to the previous one. At that, plates are equipped with inclined through channels with cross point of axes of the latter on end plane of opposite side of the plate. Damper has one solid zone, and its lower edge is flat.

EFFECT: creation of design of shutoff-control gate valve with minimised weight and dimensional characteristics and high specific coefficient of hydraulic resistance.

2 cl, 3 dwg

Description

The invention relates to the field of mechanical engineering, in particular to valve manufacturing, namely, shut-off and control pipe fittings, and can be used in oil and gas and other industries.

Known regulating valve (see RU 2109194 C1, F16K 3/312), comprising a housing with inlet and outlet pipes, a gate with perforated and continuous zones interacting on both sides with seats installed in the housing.

The disadvantage of the known design include the large overall dimensions of the valve body, due to the presence of a dual-zone gate.

Also known is a locking and regulating valve (RU 2375626 C1, F16K 3/02) a prototype comprising a housing with inlet and outlet pipes, in which saddles are installed, interacting with a double-sided gate having perforated and continuous zones. The perforated zone contains regularly arranged through holes (chokes).

The disadvantages of this design include not only the overall dimensions of the body due to the presence of a dual-zone gate, but the presence of common throttling defects: aerodynamic noise, erosive wear, the presence of cavitation, which significantly affects the flow characteristics of the control function of the valve.

The technical problem solved by the present invention is the creation of a design of shut-off and control valves with minimized weight and size characteristics and a high specific hydraulic resistance coefficient.

The problem is solved in that, the shut-off and control valve, comprising a flat gate controlled by the spindle, interacting on both sides with seats located in the inlet and outlet pipes, the seat located in the outlet pipe consists of a set of throttle plates, in which each subsequent in the course of the medium, the plate is set to the previous mirror, while the plates are equipped with through inclined channels with a point of intersection of the axes of the latter on the end plane of the opposite side of the plate, and the gate has one continuous zone, the lower end of which is made flat.

Figure 1 shows a longitudinal section of a shut-off and control valve;

figure 2 is a section along aa in figure 1; figure 3 is a section along BB in figure 2.

The shut-off and control valve consists of a housing 1 with a supply pipe 2 and a discharge pipe 3, in which a saddle 4 in the supply pipe and a saddle 5 in the discharge pipe are respectively installed. The seats 4 and 5 interact with the parallel sealing surfaces of the gate 6, controlled by the actuator 7 through the spindle 8. The gate 6 has a flat base 9. The seat 4 is pressed against the gate by the elastic element 10, and the seat 5 consists of a series of throttle plates 11 having through inclined channels 12 whose axes intersect on the opposite end plane of the plate. The plates 11 are connected by a central coupling bolt 13 and are pressed to the gate 6 through the sleeve 14 by the nut 15. To receive the channels 12, recesses 16 and recesses 17 can be made by drilling.

Shut-off and control valve operates as follows.

The conducted medium through the nozzle 2 enters the housing 1 with the shutter open, when the gate 6 is raised, the flat base 9 of the gate 6 is in contact with the upper part of the seat 4 and saddle 5 and through the throttle plates 11 into the outlet pipe 3. To close the valve, the gate 6 is lowered drive 7 until the base 9 of the gate comes into contact with the bottom of the case, while under the influence of the conducted medium the gate 6 is pressed against the seat 5. The shutter is closed.

In the mode of control valves.

The conducted medium through the pipe 2 enters the housing 1, and when the gate 6 is lifted, it enters the channels 12 of the plate 11 of the saddle 5. Since each subsequent plate 11 is mounted to the previous one, the channel 12 forms channels alternately converging and diverging of a certain length, arranged in rows parallel to the flat base 9 of the gate 6. The conducted medium, passing through the channels, undergoes sharp turns and collisions, which creates a high coefficient of hydraulic resistance.

The necessary pressure drop is created by the number of intersecting channels, their diameter and length. Overlapping the flat base 9 of the gate 6 in order of channels 12 of the seats 5, finer regulation of the pressure of the conducted medium is achieved by changing the number of channels in the flow of the conducted medium.

Claims (2)

1. Shut-off and control valve containing a spindle controlled flat gate, interacting on both sides with seats located in the inlet and outlet branch pipes of the housing, characterized in that the seat located in the outlet branch pipe consists of a set of throttle plates, in which each subsequent in the course of the medium, the plate is mounted to the previous mirror, while the plates are equipped with through inclined channels with a point of intersection of the axes of the latter on the end plane of the opposite side of the plate. 2. The locking and regulating plate according to claim 1, characterized in that the gate has one continuous zone, the lower end of which is made flat.

Images