CN1279373A

CN1279373A - Emergency leakage blocking device

Info

Publication number: CN1279373A
Application number: CN 99109378
Authority: CN
Inventors: 屈立军; 张克俭
Original assignee: COLLEGE OF CHINESE PEOPLE'S ARMED POLICE FORCES
Current assignee: COLLEGE OF CHINESE PEOPLE'S ARMED POLICE FORCES
Priority date: 1999-06-28
Filing date: 1999-06-28
Publication date: 2001-01-10
Anticipated expiration: 2019-06-28
Also published as: CN1098992C

Abstract

An emergency leakage locking device for the pressure container of combustible and explosive chemical substance or its delivering pipeline is composed of internal and external covers which are arranged in basically co axial mode. The shapes of their bottoms are matched with the peripheral shape of leaking position on pressure container or delivering pipeline. The seal is installed inside their bottoms. A pressure release valve is arranged to top of internal cover. The inner cavity of external cover is communicated with vacuum pump. Its advantages include high installation speed, high safety and reliability, and cyclic reuse.

Description

Emergency leakage blocking device

The present invention relates to pressurized container or conveyance conduit blast that prevents splendid attire or store inflammable and explosive chemical substance or the device that its influence is reduced to minimum degree.

The pressurized container or the delivery pipe that hold inflammable and explosive chemical substance are logical in case the generation of breaking is leaked untimely its consequence of rescue leak stopping with hardly imaginable.At present, the blocking method that generally adopts of people mainly contains following several:

Roof pressure leak stopping method: reaction frame is installed at the cut place, with screwing tool the aluminum rivet roof pressure in leak;

Gland leak stopping method: with the active bolt of T type gland and sealing gasket are anchored on container (pipeline) wall at the cut place;

Tie up the leak stopping method: Sealing is banded on the cut with rigging;

Drainage bonding leak stopping method: with Bond a steel plate that has conduction hole is bonded on the cut, the screw of screwing on after the curing is finished leak stopping;

Stopper leak stopping method: leak stopping is carried out at stopper wedging hole with powerful;

Injecting glue leak stopping method: on the leakage body jig is installed, the pressure injecting glue is finished leak stopping in its cavity then;

Magnetic force reaction frame leak stopping method: rely on two blocks of magnet reaction frame to be adsorbed on the cut place, roof pressure leak stopping then.

The shortcoming of these methods is: plugging time is long, and the fiery probability of exploding of too much diffusion chance of leakage loss is bigger; The counter-force value that is provided is less, and poor reliability is not suitable for bigger hole; The personnel that speedily carry out rescue work are long in the cut place waiting time, easily cause and poison or injures and deaths.

The objective of the invention is to overcome above-mentioned shortcoming, a kind of quick, safe, reliable, reusable emergency leakage blocking device that is used for inflammable and explosive chemical substance pressurized container or conveyance conduit is provided.

Emergency leakage blocking device of the present invention, the outer cover that the almost coaxial that comprises inner cover and fuse with it is arranged, the base shape of described inner cover and outer cover with matched by the peripheral shape of the part that fits with it around the pressurized container of leak stopping or the conveyance conduit leakage position, in the base of described inner cover and outer cover Sealing is housed, Decompression valves is equipped with at the top of described inner cover, and the inner chamber of described outer cover links to each other with vacuum pump.

The further improvements of emergency leakage blocking device of the present invention are that described inner cover and outer cover are with being threaded togather.

Another further improvements of emergency leakage blocking device of the present invention are on the described Decompression valves drainage tube to be housed.

The another further improvements of emergency leakage blocking device of the present invention are that described outer cover is provided with suction valve.

Emergency leakage blocking device of the present invention further improvements again is on the described inner cover pressure gauge to be housed, and on the described outer cover vacuum gauge is housed.

Emergency leakage blocking device of the present invention also further improvements is that the base of described inner cover and outer cover is ring.

The base that another alternative technology scheme of emergency leakage blocking device of the present invention is described inner cover and outer cover is rectangular.

The preferable technological scheme of emergency leakage blocking device of the present invention is amass 1.5～2 times of long-pending working pressure greater than inner cover inner chamber cross-section area and pressurized container or conveyance conduit of described outer cover inner chamber cross-section area and its inner chamber vacuum pressure.

The best ground connection of the inner cover of emergency leakage blocking device of the present invention or Decompression valves or drainage tube.

When using, emergency leakage blocking device of the present invention only need open Decompression valves, the damaged position of leaking of occurring takes place in pressurized container that inner cover is covered fill inflammable and explosive or poisonous substance or conveyance conduit, and outer cover base and container or pipe surface are fitted tightly, opening vacuum pump then makes the outer cover inner chamber form vacuum, by barometric pressure outer cover and inner cover tightly are pressed on pressurized container or the pipeline, close Decompression valves then, can block leakage, subsequently the article of accumulating in container or the pipeline are transported, after finishing, transhipment opens the suction valve on the emergency leakage blocking device outer cover, make air enter the outer cover inner chamber, can take off whole leakage-baffling device in order to using again.So emergency leakage blocking device installation rate of the present invention is fast, use is simple, safe and reliable and reusable, is applicable to the leak stopping of various cuts.

Other details of emergency leakage blocking device of the present invention and characteristics can be cheer and bright by reading the embodiment hereinafter encyclopaedize in conjunction with the accompanying drawings, wherein:

Fig. 1 is the structural representation that the present invention is used for the emergency leakage blocking device of globular pressure-container;

Fig. 2 is the structural representation that the present invention is used for the emergency leakage blocking device of conveyance conduit.

With reference to Fig. 1.Emergency leakage blocking device of the present invention comprises inner cover 1 and outer cover 2.Inner cover 1 and outer cover 2 are coaxial substantially, inner cover 1 and outer cover 2 usefulness screw threads 3 interconnect, can the annular base 4 of inner cover 1 and the annular base 5 of outer cover 2 closely be fitted on the surface of the spherical container 6 that holds inflammable and explosive chemical substance according to the size suitable adjusting inner cover 1 of P-V diameter and the axial position between the outer cover 2 during use.On the annular base of inner cover 1 and outer cover 2 Sealing is housed respectively.Sealing can adopt elastic rubber ring or rubber pad.Decompression valves 7 is equipped with at the top of inner cover 1, the top of Decompression valves 7 can join with a drainage tube (not shown), the length of drainage tube should be enough big, disposes or make poisonous and harmful substance away from operator so that in the leak stopping process flammable and explosive substance in the container is caused the distant place safety assembly point.Also be equiped with pressure gauge 8 on the inner cover 1, be used to observe the pressure of inner cover 1 inner chamber.Outer cover 2 usefulness tee unions 9 link to each other with suction valve 11 with vacuum pump 10.Vacuum gauge 12 is housed on outer cover 2, is used to monitor the pressure of outer cover 2 inner chambers.

When breakage formation hole 13 appears in pressurized container 6, the operator that speedily carry out rescue work can be under water smoke shielding cover damaged position with inner cover 1 alignment holes 13 of leakage-baffling device, should earlier Decompression valves 7 be opened before this, so that the flammable and explosive substance in the container 6 is caused at a distance, open vacuum pump 10 then rapidly the inner chamber of outer cover 2 is vacuumized, observe the reading of vacuum gauge 12 simultaneously and judge situation about vacuumizing.When being evacuated down to, the inner chamber of outer cover 2 whole outer cover 2 and inner cover 1 are inhaled firmly can close Decompression valves 7, block leakage on container 6.Then with the substance transportation in the container to the elsewhere, close vacuum pump 10 again, open the inner chamber that suction valve 11 makes air enter outer cover 2 and discharge negative pressure, take off emergency leakage blocking device in order to using again.After this just can repair normally the damaged position of container.

In order to guarantee that emergency leakage blocking device of the present invention can be adsorbed on reliably by on the pressurized container of leak stopping, amass 1.5～2 times of the long-pending working pressure greater than inner cover inner chamber cross-section area and pressurized container that should make outer cover inner chamber cross sectional area and its inner chamber vacuum pressure.

With reference to Fig. 2.Fig. 2 represents another embodiment's of emergency leakage blocking device of the present invention structural representation.Emergency leakage blocking device shown in Figure 2 is applicable to the pipeline of conveying flammable and explosive substance or the leak stopping of speedily carrying out rescue work of cylindricality jar 18, itself and leakage-baffling device difference shown in Figure 1 are that the

base

16 and 17 of inner cover 14 and outer cover 15 is the rectangle that matches with cylindricality jar or pipe surface, and this shape is easier to fit with cylindrical surface than the ring base.Sealing is housed on the

base

16 and 17 equally.

The inner cover of apparent emergency leakage blocking device of the present invention also can directly weld together to be with outer cover fixedlys connected.

When emergency leakage blocking device of the present invention uses,, preferably make inner cover or Decompression valves or drainage tube reliable ground for avoiding setting off an explosion because of flammable and explosive substance produces electrical spark owing to sharply rubbing when Decompression valves is discharged.

Emergency leakage blocking device of the present invention is installed simply, speed is fast, can finish leak stopping in 5～10 minutes, wins the quality time for speedily carrying out rescue work, and avoids some contingent blast, and the operating personnel is few at the cut place, and the waiting time is short, has reduced the personnel's that speedily carry out rescue work danger.Because negative-pressure adsorption power can be resisted the bigger pressure that leaks, so can finish the leak stopping than large break, can not produce adverse influence to container during use, device systems is reusable, and the leak stopping cost is low.

Claims

1. An emergency plugging device, characterized in that it includes an inner cover and an outer cover that is connected with it and is substantially coaxially arranged. The peripheral shape of the part around the position coincides with the shape of the part that fits. The bottom edge of the inner cover and the outer cover is equipped with a seal, the top of the inner cover is equipped with a pressure relief valve, and the inner cavity of the outer cover is connected with a vacuum pump. .

2. The emergency plugging device according to claim 1, characterized in that the inner cover and the outer cover are connected together by threads.

3. The emergency leakage plugging device according to claim 1 or 2, characterized in that a drainage tube is installed on the pressure relief valve.

4. The emergency plugging device according to claim 3, characterized in that the outer cover is provided with an air inlet valve.

5. The emergency plugging device according to claim 4, characterized in that said inner cover is equipped with a pressure gauge, and said outer cover is equipped with a vacuum gauge.

6. The emergency plugging device according to claim 5, characterized in that the bottoms of the inner cover and the outer cover are circular.

7. The emergency plugging device according to claim 5, characterized in that the bottoms of the inner and outer covers are rectangular.

8. The emergency plugging device according to claim 6 or 7, characterized in that the product of the cross-sectional area of the inner cavity of the outer cover and the vacuum pressure of the inner cavity is greater than the cross-sectional area of the inner cavity of the inner cover and the working pressure of the pressure vessel or the delivery pipeline. 1.5 to 2 times the product of pressure.

9. The emergency leakage plugging device according to claim 8, characterized in that the inner cover or the pressure relief valve or the drainage pipe are grounded.