RU2241248C2 - Adjusting device - Google Patents

Abstract

FIELD: flow measuring technologies.

SUBSTANCE: device has body detachably connected to joint, through which a rod is let connected on one end to locking piece placed on body. Locking piece is made in form of conical screw with stepped outer surface and is provided with screw groove having rectangular or trapezoid cross-section, in which a screw spiral is mounted with rectangular or trapezoid profile, slanted along outer diameter to cone identical to cone of saddle and body. Rod has main and additional packing gland compactions.

EFFECT: higher reliability.

2 cl, 2 dwg

Description

The invention relates to control devices used for transporting liquid through a pipeline, and can be used in the oil industry to regulate the injection of water into the reservoirs while maintaining reservoir pressure, as well as in the chemical, energy and other sectors of the economy.

Known locking and regulating device, comprising a housing, a regulatory body, made in the form of a hollow needle with holes on its surface, and provided with a seal made of elastic material in the form of a cone-shaped element, a pressure cone-shaped sleeve and a spring coaxially arranged with each other, with a cone-shaped sealing element and needle [1].

The disadvantages of the device are:

- unsatisfactory control accuracy, due to the fact that the change in the orifice of the throttling holes occurs due to the interaction of a spring, a cone-shaped elastic element and a sleeve with the corresponding inertia;

- the presence of vibration and noise arising from mutual impacts of elementary streams of liquid after they exit from the throttling holes;

- the complexity of the design.

The closest in technical essence to the proposed one is a device for regulating the flow in the pressure pipe, including a housing with nozzles, a saddle, a locking element mounted on the rod with the main stuffing box seal and a flywheel in the upper part [2].

The device has the following disadvantages:

- low reliability, due to the fact that it has many movable sealed joints, the latter also leads to a complication of the design;

- the presence of vibration and noise arising when a stream enters from small-diameter holes into a large space where mutual stresses between elementary streams occur.

The objective of the invention is to provide a device having a simpler design, minimal vibration and noise, more reliable in operation.

This problem is solved by the proposed device, comprising a housing, a saddle, a locking element, mounted on the rod with the main stuffing box seal and a flywheel in the upper part.

What is new is that the body has coaxial cylindrical bores that decrease in diameter in the direction of fluid movement and are interconnected by a conical surface that is a continuation of the conical surface of the saddle; the housing is detachably connected to the elbow, through which the stem is passed, provided with an additional stuffing box seal installed in the nozzle connected rigidly to the elbow at the stem passage; the locking body is made in the form of a cone-shaped screw with a stepped outer surface, and the input and output sections have a greater taper than the middle section, which forms a wedge gap with the conical surfaces of the saddle and the body, and is equipped with a helical groove of rectangular or trapezoidal section, in which a spiral spiral with rectangular or trapezoidal profile, beveled in outer diameter under the cone, identical to the cone of the seat and body.

Also new is the fact that the regulating device is equipped with a disk fixed rigidly on the rod near the flywheel, which is in kinematic connection with the slide installed with the possibility of free movement in the direction of travel of the rod.

The essence of the claimed regulatory device is illustrated by drawings.

Figure 1 shows the proposed device in longitudinal section; figure 2 - node And figure 1 close-up.

The adjusting device consists of a housing 1 (Fig. 1), made in the form of a cylindrical pipe with flanges and provided with coaxial cylindrical bores 2 and 3 (Fig. 2), interconnected by a conical surface 4.

A saddle 5 with a conical surface 6 and a locking member 7 in the form of a conical screw with a stepped outer surface having sections: cylindrical 8 and conical 9, 10 and 11 are installed inside the housing 1. The latter together with the conical surfaces 4 and 6 form a conical wedge gap 12. Sections 9 and 11 have a greater taper than the middle section 10. The locking element 7 is made with a helical groove 13 of a rectangular or trapezoidal section, in which a spiral spiral 14 of a rectangular or trapezoidal profile, beveled on the same diameter for the cone, identical to the cone 6 of the saddle 5 and the cone 4 of the housing 1. The latter is detachably connected to the elbow 15 (Fig. 1), through which the rod 16 is passed. In the nozzle 17 welded to the elbow 15 coaxially to the rod 16, there is an additional stuffing box seal 18, and above it, in the adapter 19, is the main stuffing box seal 20, which is pressed by the union nut 21.

At one end, the rod 16 is connected to the locking element 7 and has a restrictive flange 22, and at the other end, with a flywheel 23 and a disk 24, rigidly mounted on the rod. On the pipe 17 is fixed to the guide sleeve 25, covering the slider 26, kinematically connected with the disk 24.

The adjusting device in the flange joints has self-sealing cuffs 27, the clamping ring 28, and on the rod at the site of its entry into the knee - the bearing sleeve 29.

The control device operates as follows.

When the shut-off organ 7 is completely closed, the pumped medium in the cavity “a” is at rest, i.e. no fluid movement. By turning the flywheel 23, the locking member 7 moves away from the saddle 5, and as a result, a throttling gap is formed between them on the narrowed section of the conical wedge gap 12, and the pumped medium rushes through the screw channel formed by the housing 1, the saddle 5, the locking member 7 and the screw spiral 14 into cavity “b”, while maintaining rotational-translational motion.

With a greater distance of the locking element 7 from the saddle 5, the gap between them increases, as well as a throttling gap in a narrow section of the saddle 5. This leads to an increase in the flow rate of the pumped liquid through the device.

When the restrictive flange 22 touches the bearing sleeve 29, the locking member 7 will occupy its highest position, and the throttling gap will have a maximum size (area) bounded by the conical surfaces 4 and 9 and the surfaces 30 and 31 (FIG. 2).

The regulation of fluid flow in the direction of its reduction is achieved by the reverse action, focusing on the area of the slit deposited on the slider 26, which indirectly characterizes the flow through the throttling slit.

When replacing the main stuffing box seal 20, the additional stuffing box seal 18 is clamped and the necessary work is done, after which it is again relaxed.

The proposed device allows you to:

- to simplify the design, namely, to minimize the number of movable sealed joints, and thereby improve reliability in operation;

- to achieve a sharp reduction in the level of vibration and noise due to the fact that the fluid flow swirls along the peripheral zone, starting from the entrance to the exit from the throttle slit, thereby reducing the impact of elementary jets among themselves when leaving the slit; noted above will also reduce pressure loss in the area of the throttling gap.

Sources of information

1. A.S. No. 1624410, MKI 5 G 05 D 7/01, 1991 (analogue).

2.A.S. No. 1783483, MKI 5 G 05 D 7/00, 1993 (prototype).

Claims (2)

1. The regulating device, comprising a housing, a saddle, a locking element mounted on a rod with a main stuffing box seal and a flywheel, characterized in that the housing has coaxial cylindrical bores decreasing in diameter in the direction of fluid movement and interconnected by a conical surface, which is a continuation of the conical saddle surfaces; the housing is detachably connected to the elbow, through which the stem is passed, provided with an additional stuffing box seal installed in the nozzle connected rigidly to the elbow at the stem passage; the locking body is made in the form of a cone-shaped screw with a stepped outer surface, and the input and output sections have a greater taper than the middle section, which forms a wedge gap with the conical surfaces of the saddle and the body, and is equipped with a helical groove of rectangular or trapezoidal section, in which a spiral spiral with rectangular or trapezoidal profile, beveled in outer diameter under the cone, identical to the cone of the seat and body. 2. The adjusting device according to claim 1, characterized in that it is equipped with a disk fixed rigidly on the rod at the flywheel, which is in kinematic connection with the slide installed with the possibility of free movement in the direction of travel of the rod.

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