RU79963U1 - CUT-OFF DEVICE - Google Patents

Abstract

The utility model relates to pipeline valves, namely, to shut-off devices with a rotary shut-off element and can be used to install oil and gas condensate fields in wells to automatically shut off a high-pressure pipeline in case of emergency decrease or increase in pressure in it. The device comprises a housing 1 with a working cavity 2 and a seat 3. Inside the housing of the working cavity on the axis 4 of the bracket 5 there is a rotary locking element made in the form of two rotary shutters 6, 7 superimposed on top of one another, one of which is unloading with an opening 8, and the other is deaf, covering the opening of the discharge flap. On the surface of the dampers, sealing elements 9, 10 are installed, sealing sealing surfaces of the dampers and seats. In the working cavity of the housing there is a latch 11 with stops 12 mounted on the axis 13 of the housing 14 of the sensing element with the possibility of rotation on it. A rod 17, loaded with springs 15, 16, with a protrusion 18, in which a groove 19 is made, is located in the housing of the sensor element. A lock 11 is located in the groove of the rod protrusion. The latch 11. The latch holds the unloading rotary shutter with the hole in the open position. The blind rotary shutter is held by the latch 21 and is installed with the possibility of interaction with the discharge flap at the end of its rotation by means of the shank 24. The latch 21 contains a permanent magnet, or a rotary latch with an elastic element. In the horizontal (open) position, the rotary shutters 6, 7 are driven by a handle (not shown). A valve (not shown) is installed to equalize the pressure before and after the rotary locking element before opening the shutters 6, 7. The response limits of the sensitive element from lowering and increasing pressure from permissible are set by caps 22, 23. The technical result is the reliability of the device under changing operating conditions, when triggered by lowering and increasing pressure and blocking the high pressure pipeline through which the medium is transported at high speed. 1 ill.

Description

The utility model relates to pipe fittings, namely, to shut-off devices with a rotary shut-off element and can be used to install oil and gas condensate fields in wells to automatically shut off a high pressure pipeline in case of an emergency decrease or increase in pressure in it.

Known shut-off valve (RU No. 855311, 3 IPC: F16K 17/04, 15/03, publ. 08/15/81), containing a rotary shutter-type damper and fixing the damper in the open position, the sensing element, made in the form of a spring-loaded stem, on at the end of which a protrusion is made, and on the shutter, a groove that is unresponsive in form to the specified protrusion.

A disadvantage of the known valve is that it instantly closes the passage opening, leading to a complete hydraulic shock on the valve and the occurrence of a shock wave, which sharply reduces the life of the pipeline and often causes its destruction. This makes it difficult to use the valve in high pressure pipelines at high flow rates.

Known shut-off valve (RU No. 362961, IPC: F16K 3/04, 3/314, 3/34, publ. 12/20/1972) containing a rotary locking element such as a damper and holding it in the open position, and the locking element is made in the form several rotary dampers superimposed one on top of another with decreasing openings in them up to the complete overlap of the bore, which are held by individual clamps and released to lock with a rod with stops, actuated by the pressure of the medium at a speed specified by the decelerating devices throttle type.

A disadvantage of the known device is the design complexity. Known device is a shut-off device (RU No. 2103579 C1, 6 IPC: F16K 3/04, publ. 01/27/98), comprising a housing, a rotary locking element located in it, made in the form of two rotary shutters superimposed on top of one another, one of which is unloading with an opening, and the other is a blind one, blocking the opening of the discharge flap, and the main retainer holding the locking element in the open position, while it is equipped with an additional retainer and two sensing elements: one for low pressure and the other for high pressure,

made in the form of rods loaded with springs, and the rod of the low pressure sensor is connected to the main clamp, and the rod of the high pressure sensor is connected to an additional clamp installed with the possibility of interaction with the main clamp.

A disadvantage of the known device is the design complexity due to the presence of two latches and two sensitive elements.

The closest set of essential features, selected as a prototype, is a cutting device (RU No. 2249138 C2, 7 IPC: F16K 17/04, 39/04, publ. 03/27/2005) containing a housing, a rotary locking member located therein, made in the form of two rotary dampers superimposed on top of one another, one of which is unloading with a hole, and the other is blind, blocking the opening of the unloading flap, holding the locking element in the open position and a sensitive element made in the form of a spring loaded ka, moreover, the rod of the sensing element is connected with the latch, characterized in that the latch holds in the open position the unloading rotary damper with a hole, while the blind rotary damper is made with a stop and is installed with the possibility of interaction with the stop with the rod of the sensing element.

A disadvantage of the known device is the need for two factors for the operation of the device: a decrease in pressure to the installed one, and then an increase to the installed one. In real operating conditions, due to the current technological regime, or a decrease in the static reservoir pressure, the pressure in the device may not reach the set value and therefore, full response will not occur. Thus, the reliability and scope of the device are reduced.

The problem that this utility model is aimed at is to create such a technical solution, which, under changing operating conditions, ensures its reliability when triggered by lowering and increasing pressure and blocking the high pressure pipeline through which the medium is transported at high speed .

To achieve the technical result, the cutting device contains a housing, a rotary locking member located in it, made in the form of two rotary shutters superimposed on one another, one of which is a discharge shutter with an opening, and the other is a blind shutting off the opening of the discharge shutter holding the shutter in open position, the latch and the sensing element, made in the form of a rod loaded with springs, and

the rod of the sensing element is connected with a latch that holds in the open position the unloading rotary damper with a hole.

The inventive cutting device differs from the prototype in that the blind shutter has a separate latch and is installed with the possibility of interaction with the discharge shutter at the end of its rotation. The dead shutter latch contains a permanent magnet and is made in the form of a latch with an elastic element.

The proposed utility model is shown in the drawing, in which Fig. 1 shows a longitudinal section of the device in the open position, Fig. 2 is a view A in Fig. 1.

The shut-off device comprises a housing 1 with a working cavity 2 and a seat 3. Inside the working cavity housing on the axis 4 of the bracket 5 there is a rotary locking element made in the form of two rotary shutters 6, 7 superimposed on top of one another, one of which is unloading with an opening 8, and the other is blind, blocking the opening of the discharge flap. On the surface of the dampers, sealing elements 9, 10 are installed, sealing sealing surfaces of the dampers and seats. In the working cavity of the housing there is a latch 11 with stops 12 mounted on the axis 13 of the housing 14 of the sensing element with the possibility of rotation on it. In the housing of the sensing element there is a rod 17 loaded with springs 15, 16 with a protrusion 18 in which a groove 19 is made. A latch 11 is located in the groove of the rod protrusion. The latch 11. The latch holds the unloading rotary shutter with the hole in the open position. The blind rotary shutter is held by the latch 21 and is installed with the possibility of interaction with the discharge flap at the end of its rotation by means of the shank 24. The latch 21 contains a permanent magnet, or a rotary latch with an elastic element. In the horizontal (open) position, the rotary shutters 6, 7 are driven by a handle (not shown). A valve (not shown) is installed to equalize the pressure before and after the rotary locking element before opening the shutters 6, 7. The response limits of the sensitive element from lowering and increasing pressure from the allowable are set by caps 22, 23.

The device operates as follows. In the initial position (open), the latch 11 due to the buoyancy force from the pressure of the transported medium acting on the rod 17, on the one hand and the forces of the spring 16 on the other hand, are fixed in a position in which it stops the discharge rotary shutter 6 in the open position with a hole 8. At the same time, the blind rotary shutter 7 is also held by the latch 21 in the open position (see Fig. 1). In the event of an emergency decrease in pressure below that established by cap 22

the force of the spring 15 overcomes the buoyancy force from the pressure of the transported medium in the working cavity 2 of the housing 1 and moves the rod 17 into the cavity 2. The protrusion 18 of the rod 17, the axis 20 connected with the latch 11, turns it down on the axis 13 of the housing 14, while the stops 12 of the latch 11 release the unloading rotary shutter 6 with a hole 8, which freely rotates on the axis 4 of the bracket 5 under its own weight and lowers onto the saddle 3, blocking the flow of the transported medium and leaving only the hole 8 in the shutter 6 open to eliminate the guide avlicheskogo strike. After the saddle 3 is closed by the shutter 6, at the end of its rotation, the shank 24 interacts with the shutter 7, tearing it off from the latch 21. Under its own weight, the shutter 7 will freely rotate on the axis 4 of the bracket 5 and fall onto the unloading rotary shutter 6, hermetically blocking the hole 8 and the transported stream Wednesday. To open the device, it is necessary to open a valve (not shown) and equalize the pressure before and after the shut-off element. After that, using a handle (not shown), turn the locking element clockwise to a horizontal position and fix the unloading rotary shutter 6 with the latch 11, and the blind rotary shutter 7 with the latch 24 in the open position. In case of an emergency increase in pressure above that established by the cap 23, the buoyant force from the pressure of the transported medium in the working cavity 2 of the housing 1 moves the rod 17 from the cavity 2 outward, overcoming the force of the spring 16. The protrusion 18 of the rod 17 by the axis 20 connected to the latch 11 rotates it on the axis 13 of the housing 14 upward, while the stops 12 of the latch 11 release the unloading rotary damper 6 with a hole 8, which under its own weight freely rotates on 4 brackets 5 and lowers onto the saddle 3, blocking the flow of the transported medium and, leaving Thread hole 8 open only in the shutter 6 to eliminate water hammer. After the saddle 3 is closed by the shutter 6, at the end of its rotation, the shank 24 interacts with the shutter 7, tearing it off from the latch 21. Under its own weight, the shutter 7 will freely rotate on the axis 4 of the bracket 5 and fall on the unloading rotary shutter 6. hermetically closing the hole 8 and the flow being transported Wednesday.

This ensures the reliability of the device under changing operating conditions, when triggered by lowering and increasing pressure and blocking the high pressure pipeline through which the medium is transported at high speed.

Claims (3)

1. The shut-off device comprising a housing, a rotary locking member located therein, made in the form of two rotary shutters superimposed one on top of the other, one of which is an unloading one with a hole, and the other is a blind one that blocks the opening of the unloading shutter that holds the shutter in an open position position, the latch and the sensing element, made in the form of a rod loaded with springs, and the rod of the sensing element is connected to the latch, which holds the unloading rotary shutter in the open position in the hole, characterized in that the blank has a separate valve and retainer installed to interact with the discharge valve at the end of its rotation. 2. The device according to claim 1, characterized in that the latch of the blind flap contains a permanent magnet. 3. The device according to claim 1, characterized in that the latch of the blind flap is made in the form of a latch with an elastic element.