RU2184294C2 - Flow selector - Google Patents

Abstract

FIELD: manufacture of fittings; equipment of transport pipe lines; seam pressure maintenance systems in oil production. SUBSTANCE: flow selector has body with inlet and outlet cylindrical branch pipes located on both sides, detachable seats and shut- off member with drive shaft. shut-off member is provided with cylindrical and taper sectional and guides located coaxially. Through passage for drive shaft is made on cylindrical section. Detachable seats are provided with taper mounting areas. Middle portion of body on section of radial inlet branch pipe is located eccentrically relative to outlet cylindrical branch pipes. Fitted rigidly on drive shaft is eccentric bush kinematically linked with slide block which is received by flow-through passage of shut-off member perpendicularly to axis of drive shaft. Guides are received by reducing branch pipes connected with outlet cylindrical branch pipes. EFFECT: enhanced operational reliability and reduced labor consumption. 2 dwg

Description

 The invention relates to valve engineering, and in particular to the equipment of pipeline transport systems, and can be used in the oil industry, in particular, in systems for maintaining reservoir pressure (RPM) in oil production.

 Known flow switch containing a housing with inlet and outlet pipes, a shutter (shut-off element), a shaft and a drive (SU 836431 A, CL F 16 K 11/02, 07/07/1981).

 The disadvantages of this design are the limited use of pressure and flow rate and low operational reliability due to the occurrence of shock when moving the shutter (shut-off member) from one position to another.

 Also known is a multi-way valve containing a housing in which a locking member is installed, made in the form of a ball plug with an inner sleeve, bore diametrical and radial holes and a drive shaft (SU 752089 A, class F 16 K 11/12, 07/30/1980).

 The main disadvantages of this design include the high complexity of manufacturing due to the presence of a large number of parts with tight tolerances and low tech ball surfaces for processing and low operational reliability due to frequent jamming of the ball plug in the housing and the occurrence of water hammer when switching the flow.

 The closest in technical essence to the proposed one is a device comprising a housing with an inlet radial nozzle and output cylindrical nozzles located on both sides, removable seats, a locking member with a drive shaft (GB 2166847 A, class F 16 K 1/12, FIG. 3.4, 05/14/1986).

The disadvantages of the device are:
- the high complexity of manufacturing, due to the presence of a large number of parts requiring accurate manufacturing;
- insufficient operational reliability when working with environments that cause corrosion.

 The objective of the invention is to increase operational reliability and reduce the complexity of manufacturing.

 The technical result of the invention is achieved by the fact that in the flow switch, comprising a housing with an inlet radial nozzle and output cylindrical nozzles located on both its sides, removable saddles, a locking member with a drive shaft, the locking member is provided with cylindrical and conical sections, as well as guides, coaxially located with its axis, and the through channel for the drive shaft is made on a cylindrical section; removable saddles are made with conical landing sections, and the middle part of the body at the inlet radial pipe section is eccentric relative to the outlet cylindrical pipes; an eccentric sleeve is rigidly mounted on the drive shaft, kinematically connected with a slide placed in the passage channel of the locking member perpendicular to the axis of the drive shaft; guides are located in transitional branch pipes connected to output cylindrical branch pipes.

 The invention is illustrated in the drawing, where figure 1 schematically shows a flow switch (longitudinal section); figure 2 is a section along aa in figure 1.

 The flow switch consists of a housing 1 having the shape of a tee, the longitudinal part of which on the sides consists of output cylindrical pipes 2 and 3 with flanges 4 and 5, and the middle part 6 is a cylinder of a larger diameter than the output cylindrical pipes 2 and 3, is eccentrically located in relation to the side sections and is equipped with an inlet pipe 7 from the side of the eccentricity (figure 2). In the output cylindrical nozzles 2 and 3, removable saddles 8 with conical landing sections are installed, resembling the seats of conical poppet valves. In the central part of the tee 1, a locking member 9 is installed, made with a cylindrical section and conical landing sections 10 at the ends. A through channel for the drive shaft is made in the cylindrical section. The locking body 9 is equipped with a slider 11 having a degree of freedom relative to the first inlet axis 7. A through hole 12 is made in the slider 11. A through hole 13 is made in the central part of the tee 1, the axis of which is perpendicular to the axis of the inlet pipe 7 and intersects the longitudinal axis of the outlet cylindrical pipes 2 and 3. In the through hole 13, a shaft 14 is installed (Fig. 2), which carries an eccentric sleeve 15 that enters the through hole 12 of the slider 11 located in the through channel of the locking member 9. The internal cavities of the triple 1 and separated from the atmosphere by means of seals 16. The ends of the shaft 14 are symmetrically disposed handle 17 to switch the flow to the other branch. The locking body 9 at the ends is connected through the studs 18 to the guides 19, coaxially located with its axis in the connecting tees 1 of the adapter pipe 20 and 21 and representing a sleeve with three ribs, resting on the inner surface of the adapter pipe 20 and 21.

 The operation of the flow switch proceeds as follows.

 By turning the handle 17 clockwise we turn the shaft 14, together with it the eccentric sleeve 15. The latter pushes the slider 11 to the right. The slider 11 with the locking body 9 moves to the right and at the same time the slider 11 moves in the passage channel of the locking body 9 in the direction of the inlet 7. The pumped medium from the cavity "a" partially begins to pass into the cavity "b" through the formed gap between the removable seat 8 and the conical the landing portion 10 of the locking member 9. In this case, water is still directed from the cavity “a” into the cavity “b” through the existing gap between the removable seat 8 and the conical landing portion 10. When the handle 17 is in its extreme position, the locking the gun 9 with its conical landing section 10 sits on the conical surface of the removable seat 8. After that, the cavities “a” and “c” are locked and the cavities “a” and “b” are completely opened.

 When the handle 17 is moved in the opposite direction, the eccentric sleeve 15 pushes the slider 11 and the locking element 9 to the left through the shaft 14, and the cavities “a” and “b” gradually begin to open and the cavities “a” and “b” are gradually closed.

 When the handle 17 reaches the extreme position, the cavities "a" and "c" are fully open, and the cavities "a" and "b" are closed.

 The use of this technical solution in pipeline transport systems allows to increase operational reliability due to the choice of cavity seal design, due to the choice of a drive mechanism that provides translational movement of the locking element with a smooth decrease in the annular gap (section); eliminate the possibility of the appearance of water hammer when switching the flow to another branch of the pipeline, which is achieved by reducing the concentric annular gap at one end of the shut-off element, and also reduce the complexity of manufacturing by reducing the number of parts requiring accurate manufacturing.

Claims (1)

 A flow switch, comprising a housing with an inlet radial nozzle and output cylindrical nozzles located on both sides of it, removable seats, a locking member with a drive shaft, characterized in that the locking member is provided with cylindrical and conical sections, as well as guides coaxially arranged with its axis moreover, the through channel for the drive shaft is made on a cylindrical section, removable saddles are made with conical landing sections, and the middle part of the body on the section of the radial inlet pipe put eccentrically relative to the output of cylindrical nozzles, the drive shaft is rigidly seated eccentric sleeve, kinematically connected with the slider, disposed in the through passage of the valve plug axis perpendicular to the drive shaft, the guides are arranged in the transitional nozzles connected to the output cylindrical spigots.

Images