RU195267U1 - Shut-off valve - Google Patents

Abstract

A shut-off valve is proposed, comprising a housing with inlet and outlet channels, a locking member that overlaps the outlet channel, and an actuator that rotates the locking member. At the same time, a flap is used as a shut-off element, the drive that rotates the flap is made in such a way that when the pressure inside the device’s body is higher or lower than the set pressure, it releases the flap, as a result of which it closes the outlet channel, while the device is equipped with a flap position sensor, operation which is based on the difference in pressure of the working medium before the device is closed and after the closing. The technical result is an increase in the autonomy of the device. 2 s.p. f-ly, 5 ill.

Description

The proposed utility model relates to shut-off and control devices, in particular valves, designed to automatically shut off the pipeline of natural gas, gas-condensate mixture in case of emergency increase or decrease in pressure in it. The proposed shut-off valve contains a response sensor. The proposed shutoff valve is installed on the flow line of the well, at its mouth, and can also be installed on process pipelines of the oil and gas industry.

A device is cut off the patent of Russia No. 43328 from 10.01.2005. This device comprises a housing, a locking member located therein, made in the form of a rotary shutter, a latch holding the shutter in the open position, and a sensing element interacting with the locking member. In this case, the latch is made in the form of a permanent magnet.

The disadvantage of this device is the inability to automatically shut off the flow when the pressure increases or decreases.

The closest source is Russian patent No. 2285180 dated 10.10.2006, in which a shut-off valve is disclosed, comprising two bodies made with interconnected cavities, one of which has a saddle with a shutter movably mounted on it, and a rotary-lifting mechanism is placed in the other body damper, comprising a sleeve made with the possibility of movement and with an axis located inside it, a lever connected at one end to the damper, a latch position lock. In this case, the latch position of the shutter is made in the form of an electromagnet, the core of which is located between the lever and the sleeve. The core and the sleeve are made with the possibility of their connection in the lower position of the shutter and disconnect in its upper position.

The disadvantage of this device is the inability to remotely transmit a signal about the closure of the locking element.

The technical result of the utility model increases the autonomy of the device.

The technical result is achieved by the fact that the shutoff valve contains

housing with input and output channels,

shut-off element covering the output channel,

drive turning the locking element.

At the same time, a flap is used as a shut-off element, the drive that rotates the flap is made in such a way that, when the pressure inside the device’s body increases or decreases, it releases the flap, as a result of which it closes the outlet channel, and the device is equipped with a flap position sensor based on the difference in pressure of the working medium before and after the collapse after it is triggered.

In addition, the proposed device further includes a handle that allows you to manually release the flap, as a result of which it closes the output channel, and also further includes a heating device that prevents freezing in the winter time of the pipelines and the sensor mounted on them.

The essence of the claimed technical solution is illustrated by the drawings of FIG. 1-5, where

in FIG. 1 shows a drawing of the proposed shut-off valve - the main view,

in FIG. 2 shows a drawing of the proposed shut-off valve - side view,

in FIG. 3 shows a drawing of a flap position sensor used in the proposed shut-off valve,

in FIG. 4 shows a section of the proposed shut-off valve in working condition (the flap is raised),

in FIG. 5 shows a section of the proposed shut-off valve — the response and overlap field of the outlet channel (flap lowered).

In the figures, the positions indicate the following positions.

1 - housing

2 - input cover

3 - output cover

4 - flap,

5 - node lifting the flap,

6 - the handle of the slam lifting unit,

7 - drive

8 - drive handle

9 - axis

10 - bracket

11 - bypass valve,

12 - flap position sensor

13 - heating cable,

14 - insulation

15 - plug connector

16 - eye bolt

17, 18 - scales,

19 - screw

20 - sleeve

21 - cover

22, 23 - springs,

24 - lever

25 - emphasis

26 is a housing of a flap position sensor,

27 - the piston,

28 - fitting

29 - pusher

30 - bracket for the clap position sensor,

31 - switch

32 - bolt

33-34 - bolt with nut,

35-37 - o-rings.

The design of the device is shown in FIG. 1-5.

The device consists of a housing 1, an input 2 and an output 3 covers, a flap 4, a flap lifting unit 5 with a handle 6, a drive 7 with a handle 8.

The flap 4 is located inside the housing 1 on the axis 9 of the bracket 10.

To equalize the pressure of the medium before and after the flap 4, the device is equipped with a bypass valve 11.

To determine the position of the flap 4, the device is equipped with a sensor 12.

To prevent frost in the winter time of the pipelines and the sensor 12 installed on them, heating is provided with a heating cable 13 with insulation 14. The electrical connection of the heating cable is through a plug connector 15.

To sling the device during installation and dismantling on the pipeline eye bolts 16 are provided.

The principle of operation of the device is the mechanical unlocking of the flap 4 by the drive 7 in case of an emergency decrease or increase in the pressure of the working medium in the pipeline.

When the pressure inside the housing 1 is lower than the set actuating pressure of the actuator 7 indicated on the scale 17, the lever 24 of the actuator 7 disengages with a stop 25 fixed on the flap 4. Under the influence of its own weight and the flow of medium, the flap 4 rotates on the axis 9 and is pressed to the end of the outlet cover 3, blocking the flow of the working medium, and the sensor 12 sends a signal to block the passage of the device.

When the pressure inside the housing 1 is higher than the set operating pressure of the actuator 7 indicated on the scale 18, the actuator lever 7 disengages with a stop 25 fixed on the flap 4. Under the influence of its own weight and the flow of medium, the flap 4 rotates on the axis 9 and is pressed against the end of the outlet cover 3, blocking the flow of the working medium, and the sensor 12 gives a signal about the overlap of the passage of the device.

Forced operation of the device is performed by turning the handle 8 of the actuator 7 to the MANUAL position, while the handle 6 of the flap lifting unit 5 should be in the ABT position.

The locking of the locking element 4 in the OPEN position is carried out by moving the handle 8 of the actuator 7 from the position MANUAL. in the STOP position, while the handle 6 of the flap lifting unit 5 should be in the STOP position.

Setting and reconfiguring the response ranges of the actuator 7 during an emergency decrease in the pressure of the working medium in the pipeline is done by compressing the spring 22 with a screw 19 and setting the scale 17 to the level of the upper end of the sleeve 20 corresponding to the response pressure.

Setting and reconfiguring the operating ranges of the actuator 7 in case of an emergency increase in the pressure of the working medium in the pipeline is done by compressing the spring 23 with the cover 21 and setting the scale divisions 18 corresponding to the operating pressure.

The device and operation of the flap position sensor

The sensor design is shown in FIG. 3.

The sensor includes a housing 26, a piston 27, a fitting 28, a pusher 29. A bracket 30 with a switch 31 is mounted on the housing 26. The bracket 30 is mounted on the housing 26 with bolts 32. For accurate installation and locking of the switch 31 relative to the pusher 29, a bolt 33 with a nut is provided 34. To ensure tightness upon receipt of the working medium in the cavity A and B of the sensor, O-rings 35, 36, 37 are installed.

Sensor operation

The principle of operation of the position sensor is based on the difference in the pressure of the working medium in the cavity A (before the device is closed) and cavity B (after the device is closed) after the device is closed. When a pressure differential occurs on the flap of the device, the piston 27 moves to the end of the fitting 28 and moves the pusher 29, which acts on the switch 31. The switch 31 sends a signal to close the device.

After the flap is opened, the pressure in the cavities A and B of the pressure sensor becomes the same, and the piston 27 and the pusher 29 moves back, stopping the action on the switch 31. The switch 31 removes the signal about closing the device.

One of the main features of the proposed shut-off valve is that the shut-off valve contains a flap actuation sensor that can remotely transmit a shut-down closing signal to the upper level (to the control room).

Claims (2)

1. The shut-off valve, comprising a housing with input and output channels, a locking member that overlaps the output channel, and a drive that rotates the locking member, characterized in that a shutter is used as the locking member, the drive that performs the shutter rotation is made in such a way that when increasing or decreasing the pressure inside the device’s case, it releases the clap, as a result of which it blocks the output channel, while the device is equipped with a clap position sensor, the operation of which is based on the difference detecting working fluid to the device and after clacks clacks. 2. The shut-off valve according to claim 1, characterized in that it further includes a handle that allows you to manually release the flap, as a result of which it closes the outlet channel.

Images