CN1044327A - Liquid-transport pipe-line freeze plugging method and device therefor - Google Patents
Liquid-transport pipe-line freeze plugging method and device therefor Download PDFInfo
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- CN1044327A CN1044327A CN 88108139 CN88108139A CN1044327A CN 1044327 A CN1044327 A CN 1044327A CN 88108139 CN88108139 CN 88108139 CN 88108139 A CN88108139 A CN 88108139A CN 1044327 A CN1044327 A CN 1044327A
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- liquid
- gate valve
- pipeline
- transport pipe
- freeze
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Abstract
The location is provided with the gate valve of the inner chamber that can add refrigerant in a kind of pipeline of liquid-transport pipe-line freeze plugging, inside and outside freeze simultaneously and carry out, and has the effect that machine plugging and freeze plugging combine, the flashboard of gate valve can stir up and down, perforate is little, easy to operate on tube wall, and this method cooling time is short, the expensive province, the ice that is specially adapted to the bassoon oil transport pipeline is stifled.
Description
The present invention relates to a kind of liquid-transport pipe-line freeze plugging method and used equipment-gate valve.
Liquid-transport pipe-line (especially oil transport pipeline) need carry out shutoff in item operations such as maintenance, replace tubes.This is a cumbersome job, and particularly band is pressed the more difficult shutoff of pipeline of carrying liquid.Existing method for blocking has two kinds of mechanical process and freezings.Because machine plugging method equipment complexity, expensive many, freezing more and more comes into one's own, and development is very fast.
Used freeze plugging method is outside pipe refrigerating chamber to be set at present, and this kind method has been successfully used to and will have replaced laggard capable pipe freezeup with seawater or fresh water in the oil transport pipeline.Because the thermal conductivity of crude oil is little, so the bigger oil transport pipeline of caliber is difficult to freeze stifled with said method.No. 537225 patent disclosures of the Soviet Union a kind of blocking method that freezes, be the elastic shell of in pipeline, introducing a high heat conducting bar or a full of liquid, freeze the stifled time with shortening.Though this method produces effect, because of its heat conducting bar or topping up elastic shell in pipe, be difficult for fixing with its in can not charge into refrigerant, make that the effect of this method is undesirable.
The object of the present invention is to provide a kind of freeze plugging time weak point, easy to operate liquid-transport pipe-line to freeze blocking method and the suitable equipment of a cover.
The location is provided with gate valve inner chamber, that the flashboard external diameter is littler than the internal diameter of the pipeline of institute shutoff that can add refrigerant in pipeline in order to be provided with outside liquid-transport pipe-line in the refrigerating chamber in the measure that the present invention takes.
Because the effect of gate valve, liquid only flows at annular space, dwindled freezing area greatly, played the effect of similar machine plugging, can charge into freezing liquid in the gate valve simultaneously, make and carry out simultaneously inside and outside freezing, can shorten effectively and freeze the stifled time, make that freezing blocking method has applicability at big mouth in oil transport pipeline.
In the said method, gate valve is a key equipment.The gate valve of the present invention's design is provided with two arc flashboards that can spin upside down, and at valve head the column of being with cavity is set, and can charge into refrigerant in this cavity.
Master cylinder and two pairs of oil cylinders are set in addition, and master cylinder drives valve head by piston rod and moves up and down; Gear is set on the flashboard axis, connects a tooth bar on the piston rod of pair oil cylinder, cause flashboard to stir up and down by the rotation of rack drives gear.
After pipeline is used the perforator perforate, the cambered plate that is in the gate valve of upper/lower positions at first enters in the pipe under oil cylinder piston promotes, contact down tube wall after, flashboard upwards stirs automatically, valve head starts a pair oil cylinder after falling the end, makes in the flashboard continuation to turn over to desired location (shown in Fig. 2 double dot dash line).
Liquid-transport pipe-line through above design freezes blocking method, and mechanical process and freezing combine, and freezes stifled time weak point and easy to operate.The gate valve structure that is adopted is reasonable, and is very suitable.
The content that accompanying drawing is described is:
Fig. 1 is for freezing the block apparatus scheme of erection.
Fig. 2 is the gate valve erection drawing.
Fig. 3 is the main oil cylinder piston erection drawing.
Embodiment
A master cylinder of gate valve (8) and a pair oil cylinder (9) manufacture and design by stroke, and material and structure are the commercially available prod with common oil cylinder, hand-operated direction valve (11), and its connects oil cylinder and fuel tank, main for controlling, as to pay oil cylinder oil sources switching valve.Main oil cylinder piston bar (20) material is stainless steel (1Cr18Ni9Ti), in establish conduit (26) and the gas blow-down pipe (25) that adds refrigerant to column (16) inner chamber, for eliminating the stress that temperature variation produces, establish corrugated pipe segment (24), the mouth of pipe seals with cushion rubber (21).Piston rod (20) desires to stay 2 tapped holes (27), is used for installing the handle of adjusting the valve head direction.The effect of bulb (18) is to prevent to infuse the liquid in pipe overflow, and with stainless steel car system, seal ring (19) is an O type rubber ring.Paying oil cylinder piston bar (10) material is No. 45 steel, the material of tooth bar (12) and gear (13) is selected 40Cr for use, gear (13) is fixed on the flashboard axis (22), flashboard (4), column (16) and stud (15) material are stainless steel, and flashboard (4) and axle (22) are affixed with key (23).Valve head conduit (17) material is No. 45 steel.
Above gate valve flashboard (4) external diameter is φ 680, and the crude oil pipeline of φ 720 * 9 is carried out freeze plugging, and refrigerant is selected liquid nitrogen for use, freezes stifledly to carry out in the following order:
1. remove the thermal insulation layer assembly welding anticracking compensation stiffening ring (1) of pipeline (7),
2. assembling has the chuck type refrigerating chamber (6) and the folder valve (15) of tubular electric heating (2), with the hole that tapping machine leaves a φ 300 on pipeline (7) top, closed clip valve (5) after the perforate, removes perforator.
3. assembling gate valve is opened folder valve (5), the valve head of gate valve is sent into pipeline (7) and flashboard (4) is rolled up, and forms the circular flashboard of a φ 680 with column (16).
After above program finishes, promptly begin freeze plugging, crude oil shutdown before the shutoff.In refrigerating chamber (6), add liquid nitrogen earlier, add liquid nitrogen in the cavity of the column (16) of past gate valve again after 3 hours.
Freeze the bridging fruit: crude oil is Chinese Daqing oil field crude oil in the pipe, 46 ℃ of oil temperature, and oil pressure 1.5MPa, the freeze plugging time is 6 hours, liquid nitrogen consumption is 3 cubic metres.
Claims (3)
1, a kind of liquid-transport pipe-line freeze plugging method is provided with refrigerating chamber outside pipe, the invention is characterized in to locate the flashboard external diameter gate valve littler than internal diameter of the pipeline that is provided with the inner chamber that can add refrigerant in by the pipeline of shutoff.
2, liquid-transport pipe-line freezes stifled used gate valve, the invention is characterized in
A, 2 arc flashboards (4) that can spin upside down are set,
The column (16) of cavity is set on b, the valve head,
3, according to the gate valve of claim 2, it is characterized in that on flashboard axis (22), being provided with gear (13), and the active tooth bar (12) of setting and this gear engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108139 CN1044327A (en) | 1988-12-07 | 1988-12-07 | Liquid-transport pipe-line freeze plugging method and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108139 CN1044327A (en) | 1988-12-07 | 1988-12-07 | Liquid-transport pipe-line freeze plugging method and device therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1044327A true CN1044327A (en) | 1990-08-01 |
Family
ID=4834960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88108139 Pending CN1044327A (en) | 1988-12-07 | 1988-12-07 | Liquid-transport pipe-line freeze plugging method and device therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044327A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192382A (en) * | 2010-03-05 | 2011-09-21 | 中国石油天然气股份有限公司 | Method for temporarily plugging refrigeration of small-diameter oil-gas pipeline |
| CN105627015A (en) * | 2010-06-15 | 2016-06-01 | 生物膜Ip有限责任公司 | Methods, devices and systems for extraction of thermal energy from a heat conducting metal conduit |
| CN105692620A (en) * | 2016-04-16 | 2016-06-22 | 安庆市江城冶金机械有限公司 | Dry ice former |
-
1988
- 1988-12-07 CN CN 88108139 patent/CN1044327A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192382A (en) * | 2010-03-05 | 2011-09-21 | 中国石油天然气股份有限公司 | Method for temporarily plugging refrigeration of small-diameter oil-gas pipeline |
| CN105627015A (en) * | 2010-06-15 | 2016-06-01 | 生物膜Ip有限责任公司 | Methods, devices and systems for extraction of thermal energy from a heat conducting metal conduit |
| CN105692620A (en) * | 2016-04-16 | 2016-06-22 | 安庆市江城冶金机械有限公司 | Dry ice former |
| CN105692620B (en) * | 2016-04-16 | 2018-09-04 | 安庆市江城冶金机械有限公司 | A kind of dry ice molding machine |
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| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |