CN109442218A - A kind of low-lying place's water attack protection device and method of big drop oil pipeline - Google Patents
A kind of low-lying place's water attack protection device and method of big drop oil pipeline Download PDFInfo
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- CN109442218A CN109442218A CN201811378389.8A CN201811378389A CN109442218A CN 109442218 A CN109442218 A CN 109442218A CN 201811378389 A CN201811378389 A CN 201811378389A CN 109442218 A CN109442218 A CN 109442218A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Pipeline Systems (AREA)
- Pipe Accessories (AREA)
Abstract
The present invention relates to a kind of big low-lying place's water attack protection device and methods of drop oil pipeline; device is made of level-one pressure release cavity, second level pressure release cavity and three-level pressure release hole body in pressure release tank body, tank body; integrate the multiple functions such as high pressure crude oil transmission pressure release, elastic hose expansion pressure release, diffusion hole body sectional pressure relief; Multi-stage pressure-releasing has cut down the huge dynamic pressure that big drop oil pipeline generates at low-lying place, prevents surge pressure wave impact pressure release tank body；Level-one pressure release cavity is designed, oil pressure drives piston motion acting in cavity, and crude oil pressure energy is changed into piston kinetic energy, realizes the pressure release of crude oil level-one；Design second level pressure release cavity, in cavity after elastic hose expansion absorption level-one pressure release crude oil remaining water attack energy, realize the pressure release of crude oil second level；It designs three-level pressure release and spreads hole body, gradually discharge crude oil impact force stage by stage, avoid generating erosion damage to pressure release tank body.
Description
Technical field
The present invention relates to a kind of big low-lying place's water attack protection device and methods of drop oil pipeline, belong to crude oil, product oil
Long range pipe transferring technology field.
Background technique
Long distance oil pipeline mileage is up to thousands of miles, when by natural covers such as hills, mountain areas, according to big drop
Shape laying, leads to that crude oil flow velocity and pressure oscillations in pipe, low-lying place's static pressure is excessively high and dynamic pressure is excessive, induces water attack and simultaneously causes pipeline
And vibration equipment, pipeline, equipment damage are caused when serious, influence pipe safety, even running.
In order to cut down piped oil in the water attack energy at the big low-lying place of drop pipeline section, pressure-reducing station, crude stream is arranged in low-lying place
Pressure release storage tank is released pressure wave in inbound, avoids downstream piping system judder, meanwhile, pressure release storage tank shell and bottom plate are born
The violent scour of high pressure crude oil, the accidents such as Yi Fasheng tank wall perforation and tank bottom fracture oil leak.
Currently, the liquid conducting pipes water attack protection device patent published both at home and abroad specifically includes that
1. Chinese patent CN 101943284B discloses a kind of surge protection relief valve for crude oil long-distance transmission pipeline, tool
There is high relieving capacity, low noise of releasing, compact-sized, but the high pressure crude oil for flowing through relief valve enters pressure release storage tank
Afterwards, violent scour tank body, the safety accidents such as Yi Fasheng tank wall perforation.
2. a kind of water attack protection check-valves for long transfusion fluid pipeline of 6102072 invention of United States Patent (USP) US, Neng Gou
High-speed switch acts before surge pressure wave is transferred to pipe-line equipment, but such water attack protection valve is only to control pipeline and let out
The circulation area between storage tank is pressed, there is no solve the problems, such as impact failure of the highly pressurised liquid to pressure release storage tank.
3. Chinese patent CN 107850270A proposes a kind of water attack alleviation system for aqueduct, conduit upper
Opening is connected to pressure vessel, and the water (flow) direction high pressure ejection into main pipeline by the water in pressure vessel, delays in pipe when termination of pumping
The adverse current of water slows down impact of the surge pressure wave to equipment, however for the pipeline of conveying crude oil class dangerous material, if using pipe
Road-pressure vessel type connection method and decompression technique, the safety accidents such as Yi Fasheng pipeline break and crude oil leakage.
4. United States Patent (USP) US 9353899B2 devises a kind of for the water attack identification of aqueduct and guard system, pass through
The pressure pulse of pressure vessel release and surge pressure wave opposite direction, cuts down surge pressure wave, and pressure vessel is located in the system
Conduit upper, pipeline upper opening communicate therewith, and pipeline bears the physical burden of pressure vessel, and Yi Fasheng pipeline break is right
In the pipeline of the dangerous material such as conveying crude oil, it is clear that the water attack protection process flow of aqueduct is simultaneously not suitable for.
It can be seen that deficiency existing for existing water attack protection device mainly has from patent search result disclosed above:
1. the switch that domestic and international patent is to occur to improve valve when water attack for the design focal point of water attack protection valve is dynamic
Make speed, so that standard-sized sheet valve, highly pressurised liquid flow through water attack protection valve before liquid in pipe surge wave reaches water attack protection valve
Door enters storage tank pressure release, and there is no solve the problems, such as impact failure of the highly pressurised liquid to pressure release storage tank.
2. the water attack protection system of domestic and international Patent design is mainly for Long-distance Water Transmission Pipeline, by releasing stress storage tank
Interior liquid generates the pressure wave opposite with surge pressure direction of wave travel, cuts down surge pressure, and pressure vessel passes through on pipeline
Portion's opening is connected to pipeline, and pipeline bears the physical burden of pressure vessel, and the water attack of Yi Fasheng pipeline break, aqueduct is protected
Shield process flow is not particularly suited for the pipeline of the dangerous material such as conveying crude oil.Therefore, current main oil pipeline water attack protection hand
Section is still storage tank pressure release, and caused main problem is erosion damage of the high pressure crude oil to pressure release storage tank.
3. existing water attack protection device does not have Multi-stage pressure-releasing, aperture is released, the integration of anti-highly pressurised liquid erosion damage
Function.
Summary of the invention
The purpose of the present invention is to provide a kind of big low-lying place's water attack protection device and method of drop oil pipeline, from ensuring
Low-lying place's pipeline section and water attack protection system safety, the height of even running are set out, and are carried out the structure design of water attack protection device, are mentioned
Reasonable crude oil pressure releasing method out avoids high pressure crude oil washing away brokenly to tank body when pressure release storage tank cuts down piped oil pressure
It is bad.
Present invention mainly solves following problems:
1. crude oil spreads hole body followed by piston cavity with pressure, elastic hose cavity with pressure, pressure release, and with pressure potential
It can be converted with kinetic energy, the multistage of elastic potential energy, realize three-level pressure release, cut down crude oil water attack energy；
2. crude oil flow speed is varied multiple times and direction of releasing in different pressure release cavitys, effectively disperse crude oil to storage tank shell
With washing away for bottom plate, prevent tank body impaired；
3. water attack protection device follows the design principle of " Multi-stage pressure-releasing, segmentation release ", modularization pressure release cavity and release
Hole body unit, reduces number of components, reduces manufacture difficulty.
To achieve the goals above, technical scheme is as follows.
A kind of low-lying place's water attack protection device of big drop oil pipeline, including first pressure transmitter 1, inlet ball valve 2, into
Mouth shut-off valve 3, outlet shutoff valve 5, vent ball valve 6, second pressure transmitter 7, first flange 8, second flange 9, is let out conduit saddle 4
Press storage tank 10, level-one pressure release crude oil entrance 11, the first crude oil channel 12, the second crude oil channel 13, annular groove 14, sealing ring 15,
Piston 16, the first cavity 17 with pressure, the first cylindrical shell 18, third crude oil channel 19, piston stroke stop section 110, annular chamber
Body 111, level-one pressure release crude exports 112, second level pressure release crude oil entrance 21, the second cylindrical shell 22, the 4th crude oil channel 23,
Two cavitys 24 with pressure, the first fixing bolt 25, elastic aperture 26, elastic hose 27, second level pressure release diffusion hole body 28, second are fixed
Bolt 29, second level pressure release crude exports 210, three-level pressure release diffusion hole body 31, detection and control terminal 41, waterproof junction box 42, pressure letter
Number receiver 43, low-lying place upstream inflow pipeline 51, low-lying place downstream flowline 52.
Low-lying place upstream inflow pipeline 51 successively sequential connection first pressure transmitter 1, inlet ball valve 2, inlet shutoff valve
3, conduit saddle 4, low-lying place downstream flowline 52 successively sequential connection outlet shutoff valve 5, vent ball valve 6, second pressure transmitter
7, pressure release storage tank 10 is connected to low-lying place upstream inflow pipeline 51, low-lying place downstream flowline 52, in the pressure release storage tank 10
For in the first pressure release cavity A of sequential connection, the second pressure release cavity B, third pressure release cavity C, the first pressure release cavity A, one
Grade pressure release crude oil entrance 11, the first crude oil channel 12, the second crude oil channel 13, third crude oil channel 19, level-one pressure release crude oil go out
Mouthfuls 112 are sequentially communicated, and outside is the first cylindrical shell 18, the piston 16 that is linked in sequence on the outside of third crude oil channel 19,
First cavity 17 with pressure, piston stroke stop section 110, are annular groove 14, sealing ring 15, the piston stroke in the piston 16
Stop to be annular housing 111 in section 110, in the second pressure release cavity B, second level pressure release crude oil entrance 21, the 4th crude oil channel
23, second level pressure release diffusion hole body 28, second level pressure release crude exports 210 are sequentially communicated, and outside is the second cylindrical shell 22, and described the
Two cylindrical shells 22 are fastened by the first fixing bolt 25, the second fixing bolt 29, are followed successively by the outside of the 4th crude oil channel 23
Elastic aperture 26, elastic hose 27, the second cavity 24 with pressure, the first pressure release cavity A pass through first flange 8 and the second pressure release
Cavity B connection, the third pressure release cavity C is interior to spread hole body 31 for three-level pressure release, and the second pressure release cavity B passes through the second method
Orchid 9 connect with third pressure release cavity C, the pressure signal line and pressure of the first pressure transmitter 1, second pressure transmitter 7
Signal receiver 43 connects, and 43 pressure signal line of pressure signal receiver is connect with detection and control terminal 41, and pressure signal receives
It is waterproof junction box 42 on the outside of device 43.
The low-lying place's water attack protection device of big drop oil pipeline is applicable in nitrogen pressure in the first cavity 17 with pressure
0.5MPa~5.2MPa is applicable in 5 DEG C~75 DEG C of nitrogen temperature.
The low-lying place's water attack protection device of big drop oil pipeline, piston 16 are made of cermet material, only
Weight 5kg~75kg.
The low-lying place's water attack protection device of big drop oil pipeline, the first pressure release cavity A, the second pressure release cavity B,
Crude oil channel series diameter range 100mm~375mm in three pressure release cavity C.
The low-lying place's water attack protection device of big drop oil pipeline is applicable in nitrogen pressure in the second cavity 24 with pressure
0.5MPa~2.2MPa is applicable in 5 DEG C~45 DEG C of nitrogen temperature.
The low-lying place's water attack protection device of big drop oil pipeline, elastic hose 27 use oil-resistant rubber material system
At.
The low-lying place's water attack protection device of big drop oil pipeline, hole body 28 is spread in second level pressure release, three-level pressure release is expanded
Dissipate the serial pore diameter range 20mm~80mm of hole body 31.
Low-lying place's high pressure crude oil pressure releasing method:
A, low-lying place's crude oil pressure release starts: when pressure signal receiver 43 monitors first pressure transmitter 1, second pressure
When pressure difference value is greater than setting pressure threshold between transmitter 7, detection and control terminal 41 executes full pass outlet shutoff valve 5, closes outlet entirely
The order of ball valve 6, standard-sized sheet inlet ball valve 2, standard-sized sheet inlet shutoff valve 3, high pressure crude oil flow into pressure release storage tank 10；
B, low-lying place's crude oil level-one pressure release: in the first pressure release cavity A, high pressure crude oil pushes piston 16 to compress the first chamber with pressure
Nitrogen in body 17, crude oil pressure energy are changed into piston kinetic energy, realize level-one pressure release；
C, low-lying place's crude oil second level pressure release: in the second pressure release cavity B, elastic hose 27 absorbs original after level-one pressure release after expanding
The remaining water attack energy of oil, crude oil with pressure spreads hole body 28 by second level pressure release and releases paragraph by paragraph, and is deposited in pressure release storage tank 10,
Realize second level pressure release；
D, low-lying place's crude oil three-level pressure release: in third pressure release cavity C, the part crude oil with pressure after second level pressure release is let out along three-level
Pressure passageway vertical drop spreads hole body 31 by three-level pressure release and gradually discharges crude oil impact force stage by stage, and crude oil deposits after releasing
In pressure release storage tank 10, three-level pressure release is realized；
E, low-lying place's crude oil pressure release terminates: when pressure signal receiver 43 monitors first pressure transmitter 1, second pressure
When pressure difference value is less than setting pressure threshold between transmitter 7, detection and control terminal 41 executes full pass inlet ball valve 2, full mouth of putting into is cut
Only valve 3, the order of standard-sized sheet outlet shutoff valve 5, standard-sized sheet vent ball valve 6, deposition crude oil flow out pressure release storage tank 10.
The advantageous effect of the invention:
1. the big low-lying place's water attack protection device of drop oil pipeline is by pressure release tank body, tank interior level-one pressure release cavity, two
Grade pressure release cavity and three-level pressure release hole body are constituted, collection crude oil high-voltage drive pressure release, elastic hose expansion pressure release, diffusion hole body segmentation
The multiple functions such as pressure release are integrated, and guarantee controlling methodology of oil pipeline safety, even running；
2. level-one pressure release cavity is arranged in the big low-lying place's water attack protection device of drop oil pipeline, oil pressure, which drives, in cavity lives
Plug movement acting, crude oil pressure potential are changed into piston kinetic energy, realize the pressure release of crude oil level-one；
3. second level pressure release cavity is arranged in the big low-lying place's water attack protection device of drop oil pipeline, elastic hose is swollen in cavity
The remaining water attack energy of crude oil, realizes the pressure release of crude oil second level after swollen absorption level-one pressure release；
4. three-level pressure release cavity is arranged in the big low-lying place's water attack protection device of drop oil pipeline, hole body sublevel is spread in pressure release
Section gradually discharges crude oil impact force, realizes the pressure release of crude oil three-level.
5. the big low-lying place's water attack protection device of drop oil pipeline follows the principle of " Multi-stage pressure-releasing, segmentation are released ", abatement
Crude oil water attack energy effectively disperses high pressure crude oil and washes away to storage tank shell and bottom plate, avoids tank body impaired.
Detailed description of the invention
Fig. 1 is the schematic diagram that water attack protection device is arranged at the low-lying place of big drop oil pipeline in the embodiment of the present invention.
Fig. 2 is water attack protection apparatus structure schematic diagram in the embodiment of the present invention.
Fig. 3 is that piston is located at the structural schematic diagram of lower dead center in level-one pressure-releasing chamber body in the embodiment of the present invention.
Fig. 4 is that piston is located at the structural schematic diagram of top dead centre in level-one pressure-releasing chamber body in the embodiment of the present invention.
Fig. 5 is the structural schematic diagram that elastic hose is shunk in second level pressure-releasing chamber body in the embodiment of the present invention.
Fig. 6 is the structural schematic diagram that elastic hose expands in second level pressure-releasing chamber body in the embodiment of the present invention.
Fig. 7 is that hole body structural schematic diagram is spread in three-level pressure release in the embodiment of the present invention.
Specific embodiment
A specific embodiment of the invention is described with reference to the accompanying drawing, to better understand the present invention.
Embodiment
In the present embodiment, Fig. 1 is schematic diagram of the water attack protection device in the low-lying place's arrangement of big drop oil pipeline.It is adjacent defeated
Duct length 205km between petrol station field, design year throughput rate 2000 × 104T, design pressure 10MPa, caliber 813mm, drop are up to
1800m, low-lying place's static pressure can reach 17.7MPa, arrange upstream and downstream pressure monitor system and pressure-reducing station, real-time monitoring crude oil pressure
And impact of the crude oil pressure wave to low-lying place's pipeline and equipment is slowed down to crude oil pressure release by water attack protection device in standing, guarantee
Oil pipeline safety, even running.
Fig. 2 is water attack protection apparatus structure schematic diagram.Including first pressure transmitter 1, inlet ball valve 2, inlet shutoff valve
3, conduit saddle 4, outlet shutoff valve 5, vent ball valve 6, second pressure transmitter 7, first flange 8, second flange 9, pressure release storage tank 10,
Level-one pressure release crude oil entrance 11, the first crude oil channel 12, the second crude oil channel 13, annular groove 14, sealing ring 15, piston 16,
One cavity 17 with pressure, the first cylindrical shell 18, third crude oil channel 19, piston stroke stop section 110, annular housing 111, level-one
Pressure release crude exports 112, second level pressure release crude oil entrance 21, the second cylindrical shell 22, the 4th crude oil channel 23, the second cavity with pressure
24, hole body 28, the second fixing bolt 29, two are spread in the first fixing bolt 25, elastic aperture 26, elastic hose 27, second level pressure release
Hole body 31, detection and control terminal 41, waterproof junction box 42, pressure signal receiver are spread in grade pressure release crude exports 210, three-level pressure release
43, low-lying place upstream inflow pipeline 51, low-lying place downstream flowline 52.
Low-lying place upstream inflow pipeline 51 successively sequential connection first pressure transmitter 1, inlet ball valve 2, inlet shutoff valve
3, conduit saddle 4, low-lying place downstream flowline 52 successively sequential connection outlet shutoff valve 5, vent ball valve 6, second pressure transmitter
7, pressure release storage tank 10 is connected to low-lying place upstream inflow pipeline 51, low-lying place downstream flowline 52, in the pressure release storage tank 10
For in the first pressure release cavity A of sequential connection, the second pressure release cavity B, third pressure release cavity C, the first pressure release cavity A, one
Grade pressure release crude oil entrance 11, the first crude oil channel 12, the second crude oil channel 13, third crude oil channel 19, level-one pressure release crude oil go out
Mouthfuls 112 are sequentially communicated, and outside is the first cylindrical shell 18, the piston 16 that is linked in sequence on the outside of third crude oil channel 19,
First cavity 17 with pressure, piston stroke stop section 110, are annular groove 14, sealing ring 15, the piston stroke in the piston 16
Stop to be annular housing 111 in section 110, in the second pressure release cavity B, second level pressure release crude oil entrance 21, the 4th crude oil channel
23, second level pressure release diffusion hole body 28, second level pressure release crude exports 210 are sequentially communicated, and outside is the second cylindrical shell 22, and described the
Two cylindrical shells 22 are fastened by the first fixing bolt 25, the second fixing bolt 29, are followed successively by the outside of the 4th crude oil channel 23
Elastic aperture 26, elastic hose 27, the second cavity 24 with pressure, the first pressure release cavity A pass through first flange 8 and the second pressure release
Cavity B connection, the third pressure release cavity C is interior to spread hole body 31 for three-level pressure release, and the second pressure release cavity B passes through the second method
Orchid 9 connect with third pressure release cavity C, the pressure signal line and pressure of the first pressure transmitter 1, second pressure transmitter 7
Signal receiver 43 connects, and 43 pressure signal line of pressure signal receiver is connect with detection and control terminal 41, and pressure signal receives
It is waterproof junction box 42 on the outside of device 43.
It include that first piston pressure release unit A1 and second piston pressure release unit A2, A1 and A2 have in first pressure release cavity A
Identical construction and arrangement, crude oil complete level-one pressure release after flowing through A1, A2；It include the first elasticity in second pressure release cavity B
Hose pressure release unit B 1 and the second elastic hose pressure release unit B 2, B1 and B2 have identical construction and arrangement, crude stream
Second level pressure release is completed after B1, B2；Third pressure release cavity C includes the first pressure release diffusion hole body unit C1 and the second pressure release diffusion hole
Body unit C2, C1 and C2 complete three-level pressure release after there are identical construction and arrangement, crude oil to flow through C1, C2；First pressure release
Cavity A, the second pressure release cavity B, crude oil channel series diameter range 100mm~375mm in third pressure release cavity C, D are low-lying place
Upstream and downstream pressure monitoring unit.
Fig. 3 is the structural schematic diagram that level-one pressure release cavity A inner piston is located at lower dead center.Piston 16 is located at the first cavity with pressure
17 lower dead center, crude oil not yet flows into level-one pressure release crude oil entrance 11 at this time, is not carried out level-one pressure discharge operations, the first cavity with pressure
It is applicable in nitrogen pressure 0.5MPa~5.2MPa in 17, is applicable in 5 DEG C~75 DEG C of nitrogen temperature, piston 16 uses cermet material system
At net weight 5kg~75kg.
Fig. 4 is the structural schematic diagram that level-one pressure release cavity A inner piston is located at top dead centre.Low-lying place's crude oil passes through level-one pressure release
Crude oil entrance 11 enters the first crude oil channel 12, subsequently enters the second bigger crude oil channel 13 of circulation area, crude stream prompt drop
It is low, it pushes the piston 16 in the first cavity 17 with pressure positioned at lower dead center to move to top dead centre, stops section 110 to contact with piston stroke
And stop motion, the sealing ring 15 in annular groove 14 can reduce the resistance of motion of piston 16, it is adjoint in 16 motion process of piston
Nitrogen be compressed to annular housing 111, crude oil pressure potential is changed into the kinetic energy of piston 16, and the crude oil after pressure release is from level-one pressure release
Crude exports 112 are flowed out.
Fig. 5 is the structural schematic diagram that elastic hose is shunk in second level pressure-releasing chamber body.Elastic hose in second cavity 24 with pressure
27 are in contraction state, and crude oil not yet flows into second level pressure release crude oil entrance 21 at this time, is not carried out second level pressure discharge operations, second is with pressure
It is applicable in nitrogen pressure 0.5MPa~2.2MPa in cavity 24, is applicable in 5 DEG C~45 DEG C of nitrogen temperature, elastic hose 27 uses oil resistant rubber
Glue material is made.
Fig. 6 is the schematic diagram of elastic hose expansion structure in second level pressure-releasing chamber body.Crude oil by level-one pressure release passes through two
Grade pressure release crude oil entrance 21 enters the 4th crude oil channel 23, and subsequent section crude oil passes through elastic aperture 26 and enters the second cavity with pressure
24, in cavity after 27 expansion absorption level-one pressure release of elastic hose crude oil remaining water attack energy, crude oil pressure potential is changed into bullet
Property hose 27 elastic potential energy, part crude oil by second level pressure release diffusion hole body 28 release and deposit to pressure release storage tank 10,
Crude oil after remaining pressure release is flowed out from second level pressure release crude exports 210.
Fig. 7 is that hole body structural schematic diagram is spread in three-level pressure release.Crude oil by second level pressure release passes through three-level pressure release diffusion hole
Body 31 is released to pressure release storage tank 10, and three-level pressure release spreads hole body 31 and presses reduction direction to be gradually reduced aperture, sublevel along crude stream
Duan Youxu discharges crude oil impact force, avoids generating erosion damage to pressure release tank body.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art,
Without departing from the principle of the present invention, several improvements and modifications can be made, these improvements and modifications are also considered as guarantor of the present invention
Protect range.
Claims (8)
1. a kind of low-lying place's water attack protection device of big drop oil pipeline, it is characterised in that: including first pressure transmitter (1),
Inlet ball valve (2), inlet shutoff valve (3), conduit saddle (4), outlet shutoff valve (5), vent ball valve (6), second pressure transmitter
(7), first flange (8), second flange (9), pressure release storage tank (10), level-one pressure release crude oil entrance (11), the first crude oil channel
(12), the second crude oil channel (13), annular groove (14), sealing ring (15), piston (16), the first cavity (17) with pressure, the first circle
Column shell (18), third crude oil channel (19), piston stroke stop section (110), annular housing (111), level-one pressure release crude oil to go out
Mouth (112), second level pressure release crude oil entrance (21), the second cylindrical shell (22), the 4th crude oil channel (23), the second cavity with pressure
(24), the first fixing bolt (25), elastic aperture (26), elastic hose (27), second level pressure release diffusion hole body (28), second are fixed
Hole body (31), detection and control terminal (41), waterproof junction box are spread in bolt (29), second level pressure release crude exports (210), three-level pressure release
(42), pressure signal receiver (43), low-lying place upstream inflow pipeline (51), low-lying place downstream flowline (52)；
Low-lying place upstream inflow pipeline (51) successively sequential connection first pressure transmitter (1), inlet ball valve (2), import cut-off
Valve (3), conduit saddle (4), low-lying place downstream flowline (52) successively sequential connection outlet shutoff valve (5), vent ball valve (6),
Two pressure transmitters (7), pressure release storage tank (10) and low-lying place upstream inflow pipeline (51), low-lying place downstream flowline (52) are even
The first pressure release cavity (A), the second pressure release cavity (B), third pressure release cavity logical, be linked in sequence in the pressure release storage tank (10)
(C), in the first pressure release cavity (A), level-one pressure release crude oil entrance (11), the first crude oil channel (12), the second crude oil channel
(13), third crude oil channel (19), level-one pressure release crude exports (112) are sequentially communicated, and outside is the first cylindrical shell (18), institute
It states and stops section for the piston (16) that is linked in sequence, the first cavity (17) with pressure, piston stroke on the outside of third crude oil channel (19)
It (110), is annular groove (14), sealing ring (15) in the piston (16), the piston stroke stops to be annular chamber in section (110)
Body (111), the second pressure release cavity (B) is interior, second level pressure release crude oil entrance (21), the 4th crude oil channel (23), second level pressure release
Diffusion hole body (28), second level pressure release crude exports (210) are sequentially communicated, and outside is the second cylindrical shell (22), second circle
Column shell (22) is fastened by the first fixing bolt (25), the second fixing bolt (29), on the outside of the 4th crude oil channel (23) according to
Secondary is elastic aperture (26), elastic hose (27), the second cavity (24) with pressure, and the first pressure release cavity (A) passes through the first method
Blue (8) connects with the second pressure release cavity (B), are three-level pressure release diffusion hole body (31) in the third pressure release cavity (C), and described the
Two pressure release cavitys (B) are connect by second flange (9) with third pressure release cavity (C), the first pressure transmitter (1), second
The pressure signal line of pressure transmitter (7) is connect with pressure signal receiver (43), pressure signal receiver (43) pressure
Signal wire is connect with detection and control terminal (41), is on the outside of pressure signal receiver (43) waterproof junction box (42).
2. the low-lying place's water attack protection device of big drop oil pipeline according to claim 1, it is characterised in that: first is with pressure
It is applicable in nitrogen pressure 0.5MPa~5.2MPa in cavity (17), is applicable in 5 DEG C~75 DEG C of nitrogen temperature.
3. the low-lying place's water attack protection device of big drop oil pipeline according to claim 1, it is characterised in that: piston (16)
It is made of cermet material, net weight 5kg~75kg.
4. the low-lying place's water attack protection device of big drop oil pipeline according to claim 1, it is characterised in that: the first pressure release
Cavity (A), the second pressure release cavity (B), the interior crude oil channel series diameter range 100mm~375mm of third pressure release cavity (C).
5. the low-lying place's water attack protection device of big drop oil pipeline according to claim 1, it is characterised in that: second is with pressure
It is applicable in nitrogen pressure 0.5MPa~2.2MPa in cavity (24), is applicable in 5 DEG C~45 DEG C of nitrogen temperature.
6. the low-lying place's water attack protection device of big drop oil pipeline according to claim 1, it is characterised in that: elastic hose
(27) it is made of oil-resistant rubber material.
7. the low-lying place's water attack protection device of big drop oil pipeline according to claim 1, it is characterised in that: second level pressure release
Spread hole body (28), the serial pore diameter range 20mm~80mm of three-level pressure release diffusion hole body (31).
8. the low-lying place's water attack protection device of big drop oil pipeline according to claim 1, it is characterised in that: device uses
Low-lying place's high pressure crude oil pressure releasing method:
A, low-lying place's crude oil pressure release starts: when pressure signal receiver (43) monitors first pressure transmitter (1), second pressure
When pressure difference value is greater than setting pressure threshold between transmitter (7), detection and control terminal (41) executes complete close outlet shutoff valve (5), complete
The order of vent ball valve (6), standard-sized sheet inlet ball valve (2), standard-sized sheet inlet shutoff valve (3) is closed, high pressure crude oil flows into pressure release storage tank
(10)；
B, low-lying place's crude oil level-one pressure release: in the first pressure release cavity (A), high pressure crude oil pushes piston (16) to compress the first chamber with pressure
Nitrogen in body (17), crude oil pressure energy are changed into piston kinetic energy, realize level-one pressure release；
C, in the second pressure release cavity (B), original after level-one pressure release low-lying place's crude oil second level pressure release: is absorbed after elastic hose (27) expansion
The remaining water attack energy of oil, crude oil with pressure is released paragraph by paragraph by second level pressure release diffusion hole body (28), and is deposited on pressure release storage tank
(10) in, second level pressure release is realized；
D, low-lying place's crude oil three-level pressure release: in third pressure release cavity (C), the part crude oil with pressure after second level pressure release is along three-level pressure release
Channel vertical drop gradually discharges crude oil impact force by three-level pressure release diffusion hole body (31) stage by stage, and crude oil deposits after releasing
In pressure release storage tank (10), three-level pressure release is realized；
E, low-lying place's crude oil pressure release terminates: when pressure signal receiver (43) monitors first pressure transmitter (1), second pressure
When pressure difference value is less than setting pressure threshold between transmitter (7), detection and control terminal (41) executes full pass inlet ball valve (2), Quan Guan
Inlet shutoff valve (3), the order of standard-sized sheet outlet shutoff valve (5), standard-sized sheet vent ball valve (6), deposition crude oil flow out pressure release storage tank
(10)。
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| CN201811378389.8A CN109442218B (en) | 2018-11-19 | 2018-11-19 | Water hammer protection device and method for low-lying part of large-drop oil pipeline |
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| CN109442218B CN109442218B (en) | 2019-12-27 |
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Cited By (1)
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| CN109915731A (en) * | 2019-04-02 | 2019-06-21 | 中国石油工程建设有限公司 | A kind of big drop lpg pipeline pressure protective system and method |
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| CN109915731A (en) * | 2019-04-02 | 2019-06-21 | 中国石油工程建设有限公司 | A kind of big drop lpg pipeline pressure protective system and method |
| CN109915731B (en) * | 2019-04-02 | 2024-01-26 | 中国石油工程建设有限公司 | Pressure protection system and method for large-drop liquefied petroleum gas pipeline |
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| Publication number | Publication date |
|---|---|
| CN109442218B (en) | 2019-12-27 |
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