CN106704658B

CN106704658B - Two-way automatic cut-off valve

Info

Publication number: CN106704658B
Application number: CN201710013342.0A
Authority: CN
Inventors: 黄福成
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-01-09
Filing date: 2017-01-09
Publication date: 2022-11-15
Anticipated expiration: 2037-01-09
Also published as: CN106704658A

Abstract

The invention discloses a bidirectional automatic cut-off valve, which relates to the technical field of pipeline transportation and comprises a valve body and a valve core, wherein an inlet connecting pipe and an outlet connecting pipe are respectively arranged at two ends of the valve body; the valve core comprises a valve rod, one end of the valve rod, which is close to the outlet connecting pipe, is provided with an outlet valve plug and a self-locking plate, and a first return spring is arranged between the self-locking plate and the outlet connecting pipe; the inner end of the inlet connecting pipe is provided with a guide cylinder with a plurality of guide holes, a guide sleeve with a boss on the outer side is inserted in the guide cylinder, an inlet valve plug extending into the inlet connecting pipe is arranged on the guide sleeve, a second reset spring is arranged between the boss of the guide sleeve and an inner end plate of the guide cylinder, and the middle of the valve body is provided with a pressure regulating valve connecting hole. Compared with the prior art, the invention can rapidly cut off fluid delivery when the downstream pipeline is subjected to pipe explosion, and the outlet valve plug and the inlet valve plug can automatically return to the working positions after the pipeline is repaired, thereby saving time and labor, having high working efficiency and simultaneously avoiding the environment pollution caused by the fuel gas or fuel oil retained in the valve body.

Description

Two-way automatic cut-off valve

Technical Field

The invention relates to the technical field of pipeline transportation, in particular to a bidirectional automatic cut-off valve for a gas supply pipeline and a liquid supply pipeline.

Background

Resources such as gas, fuel oil, water and the like used in daily life and production are mainly conveyed by pipelines, great convenience is provided for production and life, but when the conveying pipelines leak, especially pipe explosion occurs, if the supply of the gas or the fuel oil cannot be cut off rapidly, environment pollution and resource waste can be caused, even secondary disasters occur, and the safety of people is endangered; therefore, an automatic shut-off valve needs to be installed in the delivery pipe for air supply and liquid supply. An automatic cut-off valve used at present is shown in fig. 1, and comprises a valve body 102 and a valve core, wherein an inlet connecting pipe 101 and an outlet connecting pipe 108 are respectively arranged at two ends of the valve body 102, and two arc-shaped ring grooves are arranged at intervals on the inner side of the valve body 102; the valve core comprises a valve rod 106, one end of the valve rod 106 close to an outlet connecting pipe 108 is provided with a valve plug 107-1 and a guide current limiting plate 107 in sliding connection with the valve body 102, and the guide current limiting plate 107 is provided with a plurality of current limiting holes; the other end of the valve rod 106 is provided with a self-locking plate 103 with a plurality of through holes, a plurality of limiting holes are distributed on the outer side of the self-locking plate 103 along the circumference, springs 105 and marbles 104 are arranged in the limiting holes, and the marbles 104 are abutted to the arc-shaped annular groove of the near-inlet connecting pipe 101. The automatic cut-off valve has the following defects in the use process: when the pipe burst happens to the conveying pipeline, the valve plug automatically closes the outlet of the outlet connecting pipe, after the pipeline is repaired, the valve plug cannot automatically return, the automatic cut-off valve needs to be detached and can be reused only through manual reset, the labor and the time are wasted, and the working efficiency is low; and the gas or fuel oil retained in the automatic cut-off valve can pollute the environment.

Disclosure of Invention

The invention aims to provide a bidirectional automatic cut-off valve, which can solve the problem that a valve plug cannot automatically return after the pipeline is repaired after the conventional automatic cut-off valve is closed.

In order to solve the problems, the invention adopts the technical scheme that: the two-way automatic cut-off valve comprises a valve body and a valve core, wherein an inlet connecting pipe and an outlet connecting pipe are respectively arranged at two ends of the valve body, and two arc-shaped annular grooves are arranged at the inner side of the valve body close to the outlet connecting pipe at intervals; the valve core comprises a valve rod, one end of the valve rod, which is close to the outlet connecting pipe, is provided with an outlet valve plug and a self-locking plate with a plurality of flow limiting holes, a plurality of limiting holes are distributed on the outer side of the self-locking plate along the circumference, self-locking springs and marbles are arranged in the limiting holes, the marbles are abutted against an arc-shaped annular groove which is close to the middle part of the valve body, and a first reset spring is arranged between the self-locking plate and the outlet connecting pipe; the inner installation of import takeover is equipped with the draft tube of a plurality of guiding orifices, the uide tube interpolation is equipped with the uide bushing that the outside has the boss, be equipped with on the uide bushing and stretch into the import valve plug of import takeover the boss of uide bushing with be equipped with second reset spring between the inner end plate of draft tube, the middle part of valve body is equipped with the air-vent valve connecting hole.

In the above technical solution of the bidirectional automatic shutoff valve, a more specific technical solution may also be: the inner of self-locking plate is equipped with the regulating plate, be equipped with a plurality of regulation holes on the regulating plate, the regulation hole of regulating plate with the restricted aperture staggered arrangement of self-locking plate.

Furthermore, a guide plate sleeved on the valve rod is arranged in the valve body, and the guide plate is fixed on the valve body.

Further, the outlet valve plug and the inlet valve plug are respectively provided with a sealing ring.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. the invention is arranged on a conveying pipeline, fluid pushes an inlet valve plug to move from an inlet connecting pipe to compress a second return spring, an inlet is opened, and the fluid enters a valve body and flows into a downstream pipeline through an outlet connecting pipe; when a downstream pipeline is exploded, the pressure at the outlet end of the bidirectional automatic cut-off valve is rapidly reduced, the pressure at the inlet end is greater than that at the outlet end, the flowing speed of fluid in the valve body is accelerated, the self-locking plate and the outlet valve plug are pushed to move towards the outlet end to compress the first reset spring, the outlet valve plug extends into the pipe orifice of the outlet connecting pipe to close the outlet, the fluid conveying of the pipeline is cut off, the self-locking plate moves to another arc-shaped annular groove, and the marble is abutted against the arc-shaped annular groove. The inner cavity of the valve body is filled with the fluid rapidly, so that the pressure of the inner cavity of the valve body is equal to that of the inlet pipeline, the fluid stops flowing, the second reset spring pushes the guide sleeve and the inlet valve plug to move towards the inlet end, and the inlet valve plug extends into the pipe orifice of the inlet connecting pipe to close the fluid inlet. After the downstream pipeline is repaired, opening the pressure regulating valve connected with the pressure regulating valve connecting hole to reduce the pressure in the inner cavity of the valve body, pushing the self-locking plate by the first reset spring to drive the outlet valve plug to exit the outlet connecting pipe and open the outlet; at the moment, the pressure at the inlet end is greater than the pressure in the valve body, the fluid pushes the inlet valve plug to move to compress the second return spring, the inlet is opened, and the two-way automatic cut-off valve is restored to a normal working state; the outlet valve plug and the inlet valve plug of the bidirectional automatic cut-off valve can automatically return to the working position, the bidirectional automatic cut-off valve does not need to be detached and reset, time and labor are saved, the working efficiency is high, and meanwhile, the phenomenon that fuel gas or fuel oil in the valve body is retained is avoided.

2. The inner end of the self-locking plate is provided with an adjusting plate, the adjusting plate is provided with a plurality of adjusting holes, and the adjusting holes of the adjusting plate and the flow limiting holes of the self-locking plate are arranged in a staggered mode, so that the flow of fluid can be adjusted.

Drawings

Fig. 1 is a schematic structural view of a conventional automatic shut valve.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

FIG. 3 is a schematic view of an inlet valve plug according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a guide sleeve according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a guide shell according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of a guide plate according to an embodiment of the present invention.

Fig. 7 is a top view of a guide plate of an embodiment of the present invention.

FIG. 8 is a schematic illustration of the structure of a valve stem of an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of an adjustment plate according to an embodiment of the invention.

FIG. 10 is a top view of an adjustment plate of an embodiment of the invention.

Fig. 11 is a schematic structural view of a self-locking plate of the embodiment of the invention.

Fig. 12 is a top view of a self-locking plate of an embodiment of the present invention.

FIG. 13 is a schematic view of an outlet valve plug according to an embodiment of the present invention.

FIG. 14 is a schematic view of the automatic bi-directional shut off valve of the present invention in an open position.

FIG. 15 is a schematic view of the automatic bi-directional shut off valve of an embodiment of the present invention in a bi-directional closed position.

Detailed Description

The invention will be further described in detail with reference to the following examples:

the two-way automatic cut-off valve shown in fig. 2 comprises a valve body 6 and a valve core, wherein an inlet connecting pipe 1 and an outlet connecting pipe 13 are respectively arranged at two ends of the valve body 6, and two arc-shaped ring grooves are arranged at the inner side of the valve body 6 close to the outlet connecting pipe 13 at intervals. The valve core comprises a valve rod 9, one end of the valve rod 9, which is close to an outlet connecting pipe 13, is provided with an outlet valve plug 12 and a self-locking plate 11 with six flow-limiting holes, a sealing ring 14 is arranged on the outlet valve plug 12, and a lining 15 is arranged between the sealing ring 14 and the self-locking plate 11; three limiting holes are circumferentially distributed on the outer side of the self-locking plate 11, self-locking springs 18 and marbles 17 are arranged in the limiting holes, and the marbles 17 abut against the arc-shaped annular groove near the middle part of the valve body 6, as shown in fig. 8, 11, 12 and 13. A guide plate 7 sleeved on the valve rod 9 is arranged in the valve body 6, and eight fluid through holes are formed in the guide plate 7, as shown in fig. 6 and 7; the guide plate 7 is fixed on the valve body 6 through a clamp spring, the inner end of the self-locking plate 11 is provided with an adjusting plate 10, six adjusting holes and three arc-shaped long holes distributed along the periphery are formed in the adjusting plate 10, pins extending into the three arc-shaped long holes of the adjusting plate 10 are installed on the self-locking plate 11 through threads, and the adjusting holes of the adjusting plate 10 and the limiting holes of the self-locking plate 11 are arranged in a staggered mode as shown in fig. 9 and 10; a limiting step is arranged on the inner side of the valve body 6 close to the adjusting plate 10. A first return spring 16 is arranged between the self-locking plate 11 and the outlet connecting pipe 13, and the outlet connecting pipe 13 is provided with a limiting column extending into the first return spring 16. The inner end of the inlet connecting pipe 1 is connected with a guide shell 5 which is provided with four guide holes along the radial direction through threads, a guide sleeve 3 with a boss at the outer side is inserted in the guide shell 5, the guide sleeve 3 is provided with two through holes along the radial direction and is sleeved at the inner end of the valve rod 9, the guide sleeve 3 is provided with an inlet valve plug 2 extending into the inlet connecting pipe 1, the inlet valve plug 2 is provided with a sealing ring 14, and a second reset spring 4 is arranged between the boss of the guide sleeve 3 and an inner end plate of the guide shell 5, as shown in fig. 3, 4 and 5; the middle part of the valve body 6 is provided with a pressure regulating valve connecting hole 8.

The bidirectional automatic cut-off valve is arranged on a conveying pipeline, fluid pushes an inlet valve plug 2 from an inlet connecting pipe 1 to drive a guide sleeve 3 to move and compress a second return spring 4, an inlet is opened, and as shown in figure 14, the fluid enters a valve body 6 and flows into a downstream pipeline through an outlet connecting pipe 13; when the downstream pipeline is exploded, the pressure at the outlet end of the bidirectional automatic cut-off valve is rapidly reduced, the pressure at the inlet end is greater than that at the outlet end, the flowing speed of fluid in the valve body 6 is accelerated, the self-locking plate 11 and the outlet valve plug 12 are pushed to move towards the outlet end to compress the first return spring 16, the outlet valve plug 12 extends into the pipe orifice of the outlet connecting pipe 13 to instantly close the outlet, the fluid conveying of the pipeline is cut off, the self-locking plate 11 moves to the other arc-shaped annular groove, and the marble 17 abuts against the arc-shaped annular groove. The inner cavity of the valve body 6 is filled with the fluid rapidly, so that the pressure of the inner cavity of the valve body 6 is equal to that of the inlet pipeline, the fluid stops flowing, the second return spring 4 pushes the guide sleeve 3 and the inlet valve plug 2 to move towards the inlet end, and the inlet valve plug 2 extends into the pipe orifice of the inlet connecting pipe 1 to close the inlet, as shown in fig. 15. After a downstream pipeline is repaired, the pressure regulating valve connected with the pressure regulating valve connecting hole 8 is opened, so that the pressure in the inner cavity of the valve body 6 is reduced, the first return spring 16 pushes the self-locking plate 11 to drive the outlet valve plug 12 to exit the outlet connecting pipe 13, and the outlet is opened; at the moment, the pressure at the inlet end is greater than the pressure in the valve body 6, the fluid pushes the inlet valve plug 2 to move and compress the second return spring 4, so that the inlet is opened, and the bidirectional automatic cut-off valve is restored to a normal working state; this two-way automatic cutout valve's outlet valve plug 12 and import valve plug 2 all can reply operating position voluntarily, need not pull down this two-way automatic cutout valve and reset, labour saving and time saving, and work efficiency is high, avoids being detained the gas or the fuel polluted environment in valve body 6 simultaneously.

When the upstream pipeline takes place the blasting, the pressure of this two-way automatic shut-off valve entrance point descends rapidly, and the pressure of 6 inner chambers of valve body is greater than the pressure of entrance point, and second reset spring 4 promotes uide bushing 3 and drives inlet valve plug 2 and remove to the entrance point, and inlet valve plug 2 stretches into the mouth of pipe of import takeover 1, closes the import in the twinkling of an eye, cuts off the fluidic mass and flows backward, avoids secondary disaster to take place.

Claims

1. A two-way automatic cut-off valve comprises a valve body (6) and a valve core, wherein an inlet connecting pipe (1) and an outlet connecting pipe (13) are respectively arranged at two ends of the valve body (6), and two arc-shaped annular grooves are arranged at the inner side of the valve body (6) close to the outlet connecting pipe (13) at intervals; the case is including valve rod (9), valve rod (9) are close the one end of export takeover (13) is equipped with export valve plug (12) and has self-locking plate (11) in a plurality of restricted aperture, the outside of self-locking plate (11) distributes along the circumference has a plurality of spacing holes, spacing downthehole auto-lock spring (18) and marble (17) of being equipped with, marble (17) and nearly the arc annular at valve body (6) middle part offsets its characterized in that: a first return spring (16) is arranged between the self-locking plate (11) and the outlet connecting pipe (13); the utility model discloses a valve, including import takeover (1), the inner installation of import takeover (1) is equipped with draft tube (5) in a plurality of water conservancy diversion holes, the uide bushing (3) that the outside has the boss are equipped with in draft tube (5) interpolation, be equipped with on uide bushing (3) and stretch into import valve plug (2) of import takeover (1) the boss of uide bushing (3) with second reset spring (4) are equipped with between the interior end plate of draft tube (5), the middle part of valve body (6) is equipped with air-vent valve connecting hole (8).

2. The bidirectional automatic shut-off valve according to claim 1, characterized in that: adjusting plate (10) are equipped with in the inner of auto-lock board (11), be equipped with a plurality of regulation holes on adjusting plate (10), the regulation hole of adjusting plate (10) with the restricted aperture of auto-lock board (11) staggers the setting.

3. The bidirectional automatic shut-off valve according to claim 1 or 2, characterized in that: be equipped with the suit in valve body (6) deflector (7) on valve rod (9), deflector (7) are fixed on valve body (6).

4. The bidirectional automatic shut-off valve according to claim 1 or 2, characterized in that: and the outlet valve plug (12) and the inlet valve plug (2) are respectively provided with a sealing ring (14).

5. The bi-directional automatic shut off valve of claim 3, wherein: and the outlet valve plug (12) and the inlet valve plug (2) are respectively provided with a sealing ring (14).