CN2833289Y

CN2833289Y - Explosion-proof safety valve for pipeline

Info

Publication number: CN2833289Y
Application number: CN 200520079021
Authority: CN
Inventors: 吴正平
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-02
Filing date: 2005-07-02
Publication date: 2006-11-01
Anticipated expiration: 2015-07-02

Abstract

The utility model relates to an explosion-proof safety valve for a pipeline, which relates to a flow control element in a liquid control system, particularly a safety valve which can close the pipeline in time and prevent large quantity of the liquid from leaking when the pipeline of the system and the elements on the pipeline fail and blow out suddenly. The explosion-proof safety valve comprises a valve body (1), wherein a valve core (2) is arranged in a cavity through hole of the valve body (1); the outer part of the valve core is sheathed with a spring (6); the tail end of the valve body (1) is provided with a joint (7); the valve core (2) is sealed in the cavity through hole of the valve body (1) by the joint; a damping hole (9) communicated with the cavity through hole of the valve body is arranged in the valve core; liquid flows into the valve core through a center hole of the joint and flows into the cavity through hole of the valve body through the damping hole; then the liquid flows into a lower section pipeline through a cone-shaped valve head of the valve core and a hole gap of a valve opening of the valve body; when the flow rate is too high, the utility model can push the valve core into the valve opening automatically according to the principle of differential pressure of liquid flow cutting holes, the valve opening is closed and the pipeline is cut off.

Description

The pipeline explosion relief valve

One. technical field:

The utility model relates to a kind of flow control element in the liquid control system.Particularly a kind of pipeline explosion relief valve that is used to prevent the unexpected explosion inefficacy of components and parts on system pipeline and the pipeline thereof.

Two. background technique:

From fluid control prior art, prevent the unexpected explosion of components and parts in pipeline and the system thereof, cause that the excessive way of fluid is at the pipeline front end cut-off valve to be set in the pipeline.Fluid is excessive when pipelines from bursting, and the stop valve manual or electromagnetism of front end setting is closed, and cuts off fluid, and explosion is partly stopped, and avoids fluid to leak endlessly.This way, operator are subjected to all multifactor impacts such as environment, power supply, source of the gas, magnetic field, and often operator can not in time close stop valve, cause environmental pollution and peripheral personnel's life safety not to have guarantee.From present prior art, domestic still do not have an explosion relief valve that prevents that pipelines from bursting from blinding off a line automatically.

Three, summary of the invention:

The purpose of this utility model provides a kind of pipeline explosion relief valve, when unexpected explosion takes place in pipeline, flow moment increase, be installed in the pipeline explosion relief valve of explosion pipeline leading portion and can automatically close rapidly this moment, thereby the blocking tube paths prevents leaking of fluid.

The technical solution of the utility model is, it comprises valve body 1, in valve body lumen through hole, spool 2 is housed, the afterbody of spool is a piston 3, the centre valve rod 4 of ining succession, front end is a cone-shaped valve head 5, outside the valve rod of spool front portion and cone-shaped valve head, be set with spring 6, spring is closed in the lumen through hole of valve body, the front end of spring withstands on the end face of the valve port 10 of valve body lumen through hole front end, the tail end of spring withstands on the piston end surface of spool afterbody, joint 7 is equipped with in the rear end of valve body, and joint is enclosed in spool in the lumen through hole of valve body, and seal ring 8 also is housed between joint and valve body, also have the damping hole of connecting with valve body lumen through hole 9 on the spool, and be communicated with (see figure 1) with the center hole 11 of spool.Its working principle is: the pipeline explosion relief valve saves on pipeline by joint 7, fluid flows into explosion relief valve by the endoporus of joint, the damping hole opened on the spool 2 by explosion relief valve again 9 flows into the lumen through hole of valve bodies 1, and through the hole inflow pipeline of 10 of cone-shaped valve head 5 and valve body valve ports.According to fluid throttle orifice pressure reduction principle, when having fluid to pass through damping hole, the two ends of damping sky form pressure difference, make its spool be subjected to a power identical with flowing to direction, and this power increases along with the increase of fluid flow.Like this, when this power was less than or equal to the precompression of spring 6, it is static that spool keeps.When this power during greater than the precompression of spring, spool moves to flowing to direction, and balances each other with spring force gradually, and spool is stopped on new position.When this power reached setting value, new balance made system be in threshold state, and the flow of fluid reaches setting value, and valve port just enters throttle.When fluid flow continues to increase, the pressure that then acts on the spool makes spool continue to move to flowing to direction, the flow area of valve port 10 reduces, force the rate of flow of fluid through valve port to increase fast, follow the mechanics principle of fluid, the hydrodynamic pressure that fluid acts on 5 of the cone-shaped valve heads reduces fast, destroyed the equilibrium conditions of spool, the spool fast moving is closed the valve port 10 of valve body lumen port the cone-shaped valve head of its front end rapidly, thereby has been reached the purpose that pipeline ends.

Damping hole 9 of the present utility model can be out the axial hole (see figure 2) opened on the annulus end face of the piston outside the valve rod 4 of spool.

Damping hole 9 of the present utility model can be out the radial hole on the valve rod 4 of spool, and radial hole is communicated with (see figure 1) with the center hole 11 of spool.

The pipeline explosion relief valve is a kind of self-closing device of the unexpected explosion of system pipeline and pipeline thereof and components and parts when losing efficacy, and has filled up the blank of this class valve of China.The utility model is not subjected to all multifactor impacts such as environment, power supply, source of the gas, magnetic field, can be widely used in the air supply system of premixed natural gas motor, EFI natural gas engine, for the safety of gas-fueled vehicles air supply system provides safeguard.Particularly can be used for the way far away line transportation and the transportation of rock gas, crude oil and other poisonous and harmful fluid.The utility model is installed on that chemical enterprise is inflammable, explosive, in the toxic gas pipeline, when explosion appears in pipeline, can blind off a line rapidly automatically, prevents that effectively inflammable, explosive, toxic gas from leaking, and guarantees site operation personnel and surrounding enviroment safety.The utility model reasonable in design, exquisiteness, reliable, low cost of manufacture, cheap, supporting success on probation in the gas-fueled vehicles air supply system, and obtain user's consistent favorable comment.

Four, description of drawings:

Fig. 1 is the structural representation of pipeline explosion relief valve

Fig. 2 is a kind of structural representation of the parts-spool in the pipeline explosion relief valve

Fig. 3 is the structural representation that the pipeline explosion relief valve of feather valve is housed

Five, embodiment:

The pipeline explosion relief valve is installed in the pipeline, it includes valve body 1, in the lumen through hole of valve body 1, spool 2 is housed, the afterbody of spool is a piston 3, the centre valve rod 4 of ining succession, the end is a cone-shaped valve head 5, outside the valve rod and cone-shaped valve head of spool front portion, be set with spring 6, spring is closed in the lumen through hole of valve body, both ends of the spring withstands on the end face of the piston 3 of the valve port 10 of valve body and spool respectively, at the rear portion of valve body joint 7 is housed, joint 7 is enclosed in spool 2 in the lumen through hole of valve body 1, and seal ring 8 also is housed between joint 7 and valve body, the center of spool 2 also has center hole 11, also radially has the damping hole of connecting with valve body 1 lumen through hole 9 on the center hole.For easy to use, also can on explosion relief valve, have 12 unloading holes, unloading hole and directly be communicated with valve body 1 lumen through hole.Can loading and unloading valve 12 on the unloading hole ', the structure of feather valve can be to be rotary with screw 14 in valve seat 13 central through bores, and the screw front end heads on steel ball 15, and steel ball is sealing the outlet of valve seat central through bore, and the afterbody of screw is equipped with locking nut 16.Its working procedure is: in proper functioning, the fluid that flows through in the pipeline flows into the center hole 11 of the taper valve core 2 of explosion relief valve through the endoporus of joint 7, flow into the lumen through hole of valve bodies 1 again by damping hole 9, and by the hole inflow hypomere pipeline of 10 of the valve ports of cone-shaped valve head and valve body 1.When hypomere pipeline generation pipelines from bursting, the hypomere damping is zero, the hurried increase of flow, the pressure that then acts on the spool 2 makes the rapid longshore current of spool move to direction, cone-shaped valve head is closed the lumen through hole valve port 10 of valve body, blocked pipeline, prevent that explosion vent from continuing to have fluid to flow out.After the pipeline of explosion is fixed, explosion relief valve still is in closed condition, at this moment, only need feather valve is opened, the pressure of valve body lumen through hole (at this moment obstructed) reduces by feather valve, spool 2 in the safety valve resets under spring 6 effects, makes explosion relief valve open, and at this moment closes feather valve again.For the feather valve of being lifted in the present embodiment, can be by unscrewing locking nut 16, screw 14, make steel ball 15 break away from the outlet of feather valve valve seats, the fluid unloading that leaks.After explosion relief valve was opened, precession screw, locking nut made steel ball with feather valve valve seat port closing again, made the pipeline explosion relief valve (see figure 3) of reworking.

Claims

1. pipeline explosion relief valve, it is characterized in that: it comprises valve body (1), spool (2) is housed in valve body lumen through hole, spool is by the piston of afterbody (3), the valve rod of ining succession in the centre (4), the cone-shaped valve head of front end (5) is formed, outside the valve rod (4) of spool front portion and cone-shaped valve head (5), be with spring (6), spring is closed in the lumen through hole of valve body, the front end of spring withstands on the end face of the valve port (10) of valve body lumen through hole front end, the tail end of spring withstands on the end face of spool afterbody piston (3), joint (7) is equipped with in the rear end of valve body, joint is enclosed in spool in the valve body lumen through hole, seal ring (8) also is housed between joint and valve body, also has the damping hole of connecting with valve body lumen through hole (9) on the spool.

2. pipeline explosion relief valve according to claim 1 is characterized in that: damping hole (9) is opened the axial hole on the annulus end face of the piston outside the valve rod (4) at spool.

3. pipeline explosion relief valve according to claim 1 is characterized in that: damping hole (9) is out the radial hole on the valve rod (4) at spool, and radial hole is communicated with the center hole (11) of spool.

4. pipeline explosion relief valve according to claim 1 is characterized in that: have unloading hole (12) on the valve body of safety valve, the unloading hole is communicated with the lumen through hole of valve body (1), and unloading is equipped with feather valve on the hole.