RU203081U1 - Shut-off valve with rotary segment gate - Google Patents

Abstract

A shut-off valve with a rotary segmental gate is proposed, containing a body with inlet and outlet channels, a seat installed in the body, a gate in contact with the seat and blocking the outlet channel, a body cover with a mechanical drive installed in it, a mechanical drive that rotates the gate when decreasing or an increase in pressure inside the housing, and the cocking mechanism of the mechanical drive. In this case, the shutter is made in the form of a base with a spherical movable segment attached to it, while the base is rigidly fixed on a support installed in the valve body, which rotates around its axis by a mechanical drive shaft. The mechanical drive includes two parallel-mounted pilot regulators, a horizontal flat platform located above the housing cover, a rocker arm mounted on the platform and designed to rotate around its central axis in a vertical plane, the ends of which are connected to the ends by the pilot rods, a spring-loaded pivot arm mounted on a platform and made with the possibility of holding it by a rocker arm, a shaft rotating the base, at the upper end of which the main lever is rigidly fixed, made with the possibility of holding it by a spring-loaded pivoting arm, at least one spiral spring, one end attached to the cover , and others - to the shaft, giving a constant force of rotation of the shaft, a damping mechanism installed on the platform and limiting the rotation of the main lever. The cocking mechanism of the mechanical drive is made in the form of a ratchet wheel rigidly fixed to the shaft, and at least one cocking dog associated with it. The technical result of the proposed solution is to improve the reliability and safety of the device. 7 p.p. f-ly, 10 ill.

Description

The proposed utility model relates to shut-off and control devices, in particular, valves designed to automatically shut off a pipeline.

The functional purpose of the device is to automatically shut off the pipeline when the pressure of the working medium changes (in case of an emergency increase / decrease in pressure in the pipeline) to the value set by the device setting, as well as to shut off the pipeline remotely at the operator's signal. It is installed on technological pipelines of oil and gas producing enterprises that provide transportation, storage, processing of oil, gas, oil and gas mixture, gas-water emulsion, etc.

Known shut-off valve (see RF patent No. 2558078 dated 07/27/2015), containing a housing, inlet and outlet channels, a tuning mechanism consisting of a spring-loaded horizontal piston and a vertical rod interacting with each other by flat, perpendicularly spaced stops; platoon mechanism; saddle and plug, connected by a rod with a vertical spring-loaded stem. In this case, the body is equipped with a spring-loaded plunger located perpendicular to its axis, a magnet at one of its ends, a magnetic sensor, for example, a normally open reed switch, an LED and a power source, and the spring-loaded plunger is designed so that at one end it interacts with the shutter, when the shut-off valve is open, and the other end, on which the magnet is located, is with a magnetic sensor with the shut-off valve closed, and the magnetic sensor is connected in series with the LED and the power supply. The disadvantage of this device is low reliability and safety, due to the use of a shutter on the axis.

The technical result of the proposed solution is to improve the reliability and safety of the device.

The technical result is achieved by the fact that a shut-off valve with a rotary segmental gate comprises a body with inlet and outlet channels, a seat installed in the body, a valve in contact with the seat and closing the outlet channel, a body cover with a mechanical drive installed in it, a mechanical drive that carries out rotation of the shutter when the pressure inside the body decreases or increases and the mechanism for cocking the mechanical drive. In this case, the shutter is made in the form of a base with a spherical movable segment attached to it, overlapping the saddle of the outlet channel, while the base is rigidly fixed on a support installed in the valve body, which rotates around its axis by a mechanical drive shaft;

mechanical drive, includes:

- two pilot regulators installed in parallel in the valve body, one working to increase the pressure inside the valve body, the other to decrease the pressure inside the valve body, while each pilot regulator includes a spring-loaded stem in the body, moving vertically, respectively, from an increase or decrease in pressure inside the valve body,

- a horizontal flat platform located above the housing cover,

- a rocker arm mounted on a platform and made with the possibility of rotation around its central axis in a vertical plane, the ends of which are connected to the ends by the rods of the pilot regulators,

- a spring-loaded pivoting arm mounted on a platform and made with the possibility of holding it by a rocker arm,

- a shaft rotating the base, with its lower part fixed in the cover, and with its upper part in a horizontal flat platform, while at the upper end of the shaft the main lever is rigidly fixed, made with the possibility of holding it by a spring-loaded pivoting lever,

- at least one spiral spring, one end attached to the cover, and the other to the shaft, giving a constant force of rotation of the shaft,

- a damping mechanism installed on the platform and limiting the rotation of the main lever.

And the cocking mechanism of the mechanical drive is made in the form of a ratchet wheel rigidly fixed on the shaft, and at least one cocking dog connected to it, fixed on a horizontal flat platform.

The mobility of the spherical segment is carried out by at least one spring pushing the spherical segment away from the base.

The horizontal flat platform can be mounted on at least one post attached to the housing cover or bolts connecting it to the housing cover.

The ends of the rocker arm rotating around the central axis in the vertical plane are connected to the ends of the pilot regulator rods by means of rod pushers. In this case, the rocker arm is mounted on an axis fixed in a bracket mounted on a horizontal flat platform.

The shaft is fixed in the cover and platform by means of bearings and is connected to the valve base by means of a splined connection.

The pivot bearing must also be mounted in the valve body by means of bearings.

The essence of the claimed device is illustrated by drawings (Fig. 1-10):

figure 1 shows a drawing of the proposed shut-off valve - main view and side view;

figure 2 shows a drawing of the proposed shut-off valve - the placement of the shutter elements in the body in the positions "OPEN" - "CLOSED" (with the removed actuator);

figure 3 shows a section of the proposed shut-off valve at the location of the pilot regulator P1, configured to trigger the shut-off valve in case of an emergency increase in pressure and the pilot regulator P2, configured to trigger the shut-off valve in the event of an emergency decrease in pressure;

figure 4 shows a drawing of the proposed shut-off valve - the arrangement of the drive elements in the positions "OPEN" and "CLOSED";

figure 5 shows a general view of the shut-off valve (3D model);

Fig. 6 shows a shut-off valve with a cutout in the "OPEN" position (3D model);

Fig. 7 shows a shut-off valve with a cutout in the "CLOSED" position (3D model);

Fig. 8 is a cross-sectional view of the assembled cover;

Fig. 9 shows a rocker arm;

Figure 10 shows the kinematics of movement of the actuator levers when the valve is closed.

In the figures, the positions indicate the following parts and assembly units:

1 - body assembly,

2 - shutter assembly,

3 - cover assembly,

4 - spiral drive springs,

5 - plate for fastening drive elements,

6 - rod of the pilot regulator P1,

7 - rod of the pilot regulator P2,

8 - rocker lever,

9 - bracket,

10 - the core of the electromagnet,

11 - electromagnet,

12.13 - pilot regulator housings,

14,15 - pilot regulator caps,

16.17 - compression springs of the pilot regulator,

18.19 - roller pushers,

20 - shaft,

21 - the main lever,

22 - hydraulic damper,

23.24 - cocking dogs,

25 - ratchet wheel,

26 - rotary lever,

27 - locking lever,

28 - saddle,

29 - seal,

30 - support,

31 - thrust bearing,

32 - spherical movable segment,

33 - springs,

34 - base,

35 - case,

36 - cover,

37.38 - pins,

39 - gasket,

40 - slotted spring,

41 - bearings,

42.43 - seals,

44.45 - bolts.

Design and operation of the shut-off valve.

The valve consists of a body assembly 1, a shutter 2, a cover assembly 3, inside which there are spiral springs 4, a plate for fastening the drive elements 5 (Fig. 1), a P1 pilot regulator set to operate when the medium pressure in the valve rises and a pilot regulator P2, configured to operate when the pressure of the medium in the valve decreases (Fig. 3).

The body assembly 1 (Fig. 2) includes a body 35, inside of which a base 34 is installed on a support 30 with a bearing 31. A spring-loaded spherical movable segment 32 with a spherical sealing surface B having a high processing class is mounted on the base 34. The mobility of the segment of the spherical segment 32 is provided by springs 33, the eccentric design of the valve 2 at the point of attachment of the shaft 20 (spline surface D) with the support 30 (spline surface D) are necessary to ensure a high class of tightness of the valve 2 and the seat 28 in the closed position, to ensure self-cleaning of the valve in the moment of closing the bore of the seat 28. The seal of the valve is metal-to-metal, the parts of the valve, the seat 28 and the spherical segment 32 are made of special stainless steels with high hardness. To prevent leaks of the transported medium, a seal 29 is installed between the body 35 and the seat 28.

The initial position of the slam-shut valve "OPEN" is shown in Fig. 2 and Fig. 6.

Pilot regulators P1 and P2 (Fig. 3) are adjusted by achieving a certain compression force of the springs 16 and 17, which are installed in the inner cavity of the bodies 12 and 13 with an emphasis on the end of the rods 6 and 7. When screwing caps 14 and 15 into the internal threaded hole of the bodies the springs are compressed to the required force.

The design of the pilot regulators is made in such a way that the P1 pilot regulator operates only in the event of an emergency increase in pressure in the valve body, the P2 pilot regulator is limited in movement due to the increased pressure. In the event of an emergency decrease in pressure in the valve body, the pilot regulator P2 is activated, the pilot regulator P1 is limited in movement in the event of an emergency decrease in pressure in the valve body

In the event of an emergency increase in pressure in the valve, the rod 6 of the pilot regulator P1, overcoming the compression force of the spring 16, begins to move up (the direction is indicated by the arrow), through the pusher of the rod, the roller 18 transfers the force to the plane "З" (Fig. 9) of the rocker arm 8 and turns it on the axis of the bracket 9 at a certain angle. When turning the rocker lever 8, the spring-loaded pivot lever 26 comes out of the stop with the protrusion "K", rotates due to its spring on its axis and disengages the spring-loaded lever lock 27, which fixes the main lever 21 in the "OPEN" position, fixed on shaft 20 and thus disengages the entire linkage of the drive. The main lever 21 of the linkage rotates together with the shaft 20, transferring the slotted surface D of the shaft 20 and the slotted hole D of the support 30 by 90 degrees counterclockwise to the shutter 2, moving the valve from the "OPEN" position to the "CLOSED" position. The kinematics of turns and movements of the levers from the "OPEN" position to the "CLOSED" position is shown in Fig. 10 (movement - arrows, the position of the levers in the "CLOSED" position - dash-dotted lines).

In the event of an emergency decrease in pressure in the valve, the rod 7 is a pilot regulator P2, under the action of the compression force of the spring 17, it starts to move down (the direction is indicated by the arrow), through the pusher of the rod, the roller 19 transfers the force to the plane F (Fig. 9) of the rocker arm 8 and turns it on the axis of the bracket 9 at a certain angle. When turning the rocker arm 8, the spring-loaded pivot arm 26 comes out of the stop with the protrusion "K", rotates with its spring on its axis and disengages the spring-loaded lever lock 27, which is fixed in the "OPEN" position, the main lever 21, fixedly fixed on the shaft 20 and thus disengages the entire drive linkage. The main lever 21 of the linkage rotates together with the shaft 20, transferring the slotted surface D of the shaft 20 and the slotted hole D of the support 30 by 90 degrees counterclockwise to the shutter 2, moving the valve from the "OPEN" position to the "CLOSED" position.

The valve is moved from the "OPEN" position to the "CLOSED" position after the pilot regulators P1 and P2 are actuated by the cover assembly parts 3 due to the creation, when the valve is set to the initial "OPEN" position, a certain twisting force of 3 rows of coil springs 4, fixed by pins 37 and 38 with one end to the cover 36, the other to the shaft 20 (Fig. 8). Shaft 20 is mounted on bearings 41 between cover 36 and plate 5. Plate 5 is attached to cover 36 with bolts 44, 45. In order to avoid contact and friction between the spiral springs, spacers 39 are installed. In the upper part, a ratchet wheel 25 and the main lever 21. A slotted spring 40 is installed in the lower part of the shaft 20 from the side of the slotted surface D to eliminate backlash and ensure rigidity of the connection with the shutter 2 when mounting the body assembly 1 and the cover assembly 3. Tightness of the cover assembly 3 with respect to the external environment provided by seals 42, 43.

Restriction of the shutter rotation by 90 degrees counterclockwise to the "CLOSED" position is provided by installing a hydraulic damper 22, which contacts at the moment of closing with the main lever 21 and restricts its movement. In addition, the hydraulic damper is designed to regulate the response speed of the shutter 2 at the final moment of its closing and to prevent water hammer.

After actuation, the valve is moved from the “CLOSED” position to the initial “OPEN” position by turning the shaft 20 by an angle of 90 degrees clockwise using a special spanner wrench, which has an internal hole in the head corresponding in shape to the section of the shaft 20 in its upper part. To exclude the possibility of return of the shaft 20 under the action of the compression force of the coil springs in the "CLOSED" position, cocking pawls 23 are provided; 24, which at the moment of rotation of the shaft should be in engagement with the ratchet gear 25. After fixing the main lever 21 with the lever lock 27, as indicated in Fig. 4 in the "OPEN" position, the pivot arm 26 should contact the projection K of the rocker arm 8 , and the cocking pawls must be disengaged with the ratchet gear 25. This position corresponds to the readiness of the valve to operate in the event of an emergency increase / decrease in pressure in it.

The valve closes on a signal from the operator by applying an electric signal to the electromagnet 11. Under the action of the electromagnetic field, the core of the electromagnet 10 is drawn into the body, converting its linear movement into the rotational movement of the rocker arm 8 and rotates it on the axis of the bracket 9 at a certain angle. When turning the rocker arm 8, the spring-loaded pivot arm 26 comes out of the stop with the protrusion "K", rotates on its axis and disengages the spring-loaded lever lock 27, which is fixed in the "OPEN" position of the main lever 21, which is fixedly fixed on the shaft 20 and, thus disengages the entire drive linkage. The main lever 9 of the linkage rotates together with the shaft 20, transferring the slotted surface D of the shaft 20 and the slotted hole D of the support 30 by 90 degrees counterclockwise to the shutter 2, moving the valve from the "OPEN" position to the "CLOSED" position.

In order to protect the lever mechanism from atmospheric precipitation, a protective casing is provided in the design of the slam-shut valve, which is attached to the cover assembly 3 (not shown in Figs. 1-9).

Valve advantages:

1. The eccentric self-cleaning design of the valve excludes the possibility of contact of the sealing surfaces until the moment of complete closure, ensures the contact of the sealing surfaces only at the last moment of closing the valve or at the initial moment of opening, thereby eliminating constant contact of the sealing surfaces in the working environment with abrasive inclusions during the movement of the valve.

2. For a tighter fit of the spherical movable segment on the saddle, its compliance is provided due to the spring-loaded construction of the spherical 32 segment in the shutter 2.

3. Possibility of operation both in automatic mode and at the command of the operator by supplying an electric signal to the electromagnet.

4. Exceptional strength and precision of the spline connection of the drive shaft with the shutter completely eliminates backlash and idle strokes.

5. The design of the valve body is one-piece, eliminating the intermediate connections "body-bonnet".

6. The design of the valve is full bore for medium flow.

The offered shut-off valve with a rotary segmental eccentric valve has no analogues in Russia.

Claims (25)

1. A shut-off valve with a rotary segment gate, comprising: - housing with input and output channels, - a saddle installed in the body, - a valve that is in contact with the seat and closes the outlet channel, - housing cover with a mechanical drive installed in it, - a mechanical drive that rotates the shutter when the pressure inside the body decreases or increases, and - mechanical drive cocking mechanism, characterized in that the shutter is made in the form of a base with a spherical movable segment attached to it, overlapping the saddle of the outlet channel, while the base is rigidly fixed on a support installed in the valve body, which rotates around its axis by a mechanical drive shaft; mechanical drive, includes: - two pilot regulators installed in parallel in the valve body, one working to increase the pressure inside the valve body, the other to decrease the pressure inside the valve body, while each pilot regulator includes a spring-loaded stem in the body, moving vertically, respectively, from an increase or decrease in pressure inside valve body, - a horizontal flat platform located above the housing cover, - a rocker arm mounted on a platform and made with the possibility of rotation around its central axis in a vertical plane, the ends of which are connected to the ends by the rods of the pilot regulators, - a spring-loaded pivoting arm mounted on a platform and made with the possibility of holding it by a rocker arm, - a shaft rotating the base, with its lower part fixed in the cover, and with its upper part in a horizontal flat platform, while at the upper end of the shaft the main lever is rigidly fixed, made with the possibility of holding it by a spring-loaded pivoting lever, - at least one spiral spring, one end attached to the cover, and the other to the shaft, giving a constant force of rotation of the shaft, - a damping mechanism installed on the platform and limiting the rotation of the main lever; the cocking mechanism of the mechanical drive is made in the form of a ratchet wheel rigidly fixed to the shaft, and at least one cocking dog connected to it, fixed on a horizontal flat platform. 2. The shut-off valve according to claim 1, characterized in that the mobility of the spherical segment is carried out by at least one spring repulsing the spherical segment from the base. 3. The shut-off valve according to claim 1, characterized in that the horizontal flat platform is mounted on at least one post attached to the housing cover or bolts connecting it to the housing cover. 4. The shut-off valve according to claim 1, characterized in that the ends of the rocker arm rotating around the central axis in the vertical plane are connected to the ends of the pilot regulator rods by means of rod pushers. 5. The shut-off valve according to claim 1, characterized in that the rocker arm is mounted on an axis fixed in a bracket mounted on a horizontal flat platform. 6. The shut-off valve according to claim 1, characterized in that the shaft is fixed in the cover and platform by means of bearings. 7. The shut-off valve according to claim 1, characterized in that the shaft of the mechanical drive is connected to the base of the shutter by means of a splined connection. 8. The shut-off valve according to claim 1, characterized in that the rotating support is mounted in the valve body by means of bearings.

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