CN206945357U - A kind of oil pipeline on-line period device - Google Patents

Abstract

A kind of oil pipeline on-line period device is the utility model is related to, the on-line period device is provided with one section of bypass on main pipeline, and the arrival end of the bypass connects sampling probe, and the sampling probe accesses main pipeline；Sampling pump is provided with the bypass and is followed by sampling loop and spray circuits in sampling pump, the port of export of the spray circuits accesses main pipeline through nozzle, and the sampling loop substitutes table sample, and remaining liq finally also imports main pipeline.The utility model can realize that reliable, real-time continuous, sample size is accurate, flow control in loop is accurate, be finally reached and obtain representative sample, sampling process automation, the requirement of system control precision.

Description

A kind of oil pipeline on-line period device

Technical field

A kind of oil pipeline on-line period device is the utility model is related to, belongs to detection and the pipeline sampling system skill of quality Art field.

Background technology

For oil pipeline on-line period technology, conventional process is manual manual sampling or on oil transportation main pipeline Bypass is drawn, and sampling pump and sampling equipment are set in bypass, then the mode for leading back injection main pipeline will be bypassed.

The shortcomings that such a sampler is：1st, mixing arrangement is not provided with, can not ensure that liquid is sufficiently mixed in pipeline, is obtained Sample may be under-represented；2nd, be not provided with sampling control system, can not realize to sampling system equipment state, power conditions, The monitoring of sampling loop flow velocity, sampling frequency；3rd, flow measurement is not carried out to sampling loop, to liquid stream in sampling loop whether just Chang Wufa judges；4th, because pipeline medium cleannes are not high, the impurity that the inside is contained is frequently occluded sampling pump, causes sampling pump Failure damage, it can not thus realize that on-line period is carried out continuously；5th, pump discharge pipeline easily produces backflow；6th, it is not provided with manually Sampler, the system failure can not sample；7th, back-up circuit is not provided with, system easily produces failure；8th, it is not provided with sampling container Facility is protected, sample is easily produced and overflows peril；9th, it is not provided with cleaning interface, is unfavorable for system maintenance, easily pollutes sample Product；10th, temperature, pressure instrumentation are not provided with, lacks the monitoring to loop process parameter；11st, flow control is not implemented, can not Realize that sampling loop flow follows main pipeline changes in flow rate；12nd, be not implemented in sampling rate and sample size and main pipeline flow into Ratio.

Utility model content

To solve the above problems, the purpose of this utility model is that providing one kind makes the operation of oil pipeline on-line period more become In standardization, facilitation, scientific, automation, on-line period systematic sampling representativeness, accuracy, continuity, reliably are improved Property and security, facilitate operation maintenance, monitoring management, the oil pipeline on-line period device of installation and transportation.

The purpose of this utility model is achieved through the following technical solutions：

A kind of oil pipeline on-line period device, it is integrated in sledge and loaded onto, and one section of bypass is provided with main pipeline, described The arrival end of bypass connects sampling probe, and the sampling probe 1 stretches into main pipeline center to main pipeline central lower 0.1D position, D is the diameter of main pipeline；Sampling probe is sequentially connected in series process valve A and process valve B, the process valve B connection branch roads A With branch road B entrance, the branch road A is identical with branch road B settings, and wherein branch road A is sequentially connected in series process valve C, pressure from entrance Table A, filter A, sampling pump A, pressure gauge B, process valve D and check valve A, branch road A and branch road B outlet merge into a pipe Road, and process valve G and process valve H are sequentially connected in series after joint, most access main pipeline through the nozzle afterwards；

The branch road A, branch road B joint and process valve G between it is other connect sampling loop, wherein, the sampling loop Process valve I, on-line densimeter and process valve K are sequentially connected in series from entrance, the process valve K connection branch road C's and branch road D Entrance；The branch road C is identical with branch road D setting, and wherein branch road C is sequentially connected in series process valve L, sampling control valve A from entrance With process valve M, branch road D process valve N, sampling control valve B and process valve O are sequentially connected in series from entrance；The branch road C with Branch road D outlet merges into a pipeline, and is sequentially connected in series after joint pressure transmitter, temperature transmitter, flowmeter, clear Valve B, process valve Q and process valve R are washed, finally imports main pipeline；

Sampled control valve A and sampling control valve B's branch road C and branch road D are connected together as pipeline E respectively, the pipeline E's Entrance connects liquid separation triple valve, connects sample reception tank A and sample reception tank B, the sample respectively after the liquid separation triple valve Product receiving tank A and sample reception tank B are respectively placed on weighing instrument A and weighing instrument B；

Sampling pump A, on-line densimeter, weighing instrument A, weighing instrument B, sampling control valve A, sampling control valve B, liquid separation threeway Valve, pressure transmitter, temperature transmitter, flowmeter connect by instrument cable access controller, the controller through instrument cable Enter master control system.

Further, the nozzle is hollow straight tube, the bottom lock of the nozzle and is combined with main pipeline bottom, described It is empty that the outer wall of hollow straight tube is uniformly provided with several sprays.

Further, the other dynamic sampling valve of catcher between sampling probe and process valve A；

It is other between the entrance and liquid separation triple valve of the pipeline E to connect relief valve.

Further,

It is other between process valve B and branch road A, branch road B inlet connections to meet purge valve A；

It is other between the entrance and process valve I of sampling loop to connect sewage draining valve.

Further,

Filter A both sides parallel connection differential pressure switches A, the differential pressure switch A is through instrument cable access controller；

Pipeline F parallel connection technology the valves J, the process valve J that process valve I, on-line densimeter and process valve K are formed With connecing emptying valve by the junction of pipeline F outlets；

Branch road C and branch road D both sides are parallel with one section of bypass line, and the bypass line is provided with process valve P.

Further, it is single between process valve A and process valve B, process valve B and branch road A, branch road B inlet connections To valve A and branch road A, branch road B outlet joint between, branch road A, branch road B outlet joint and process valve G between, work Between skill valve G and process valve H, between the entrance and process valve I of sampling loop, process valve K and branch road C, branch road D Between inlet connection, between branch road C, branch road D outlet joint and pressure transmitter, between purge valve B and process valve Q, Electric tracing thermal insulation part is equipped between process valve Q and process valve R.

Further, the sampling pump B on the sampling pump A and branch road B uses frequency conversion centrifugal pump.

Further, the metal screen in the filter B on the filter A and branch road B is provided with magnetic absorption device.

The beneficial effects of the utility model are：

It can realize that oil pipeline on-line period is carried out continuously using on-line period device described in the utility model, there is sampling Representativeness, quantity accuracy, operation stability, simple operation, beneficial to many-sided advantage such as maintenance in the future and maintenance, realize Also superior system remote detection and control are subjected to while sampling system independent control.Pipe-line construction and operational management is set more to become In standardization, modularization, high efficiency, hommization, shortcut.

Oil pipeline is reliable, easy for installation, real using that can be realized after on-line period device described in the utility model Shi Lianxu, sample size are accurate, flow control in loop is accurate, and reach obtain representative sample, sampling process automation, System control precision requirement, ensure that sampling system it is continuous, obtain representational sample stably, automatically, in proportion. The device is provided with dynamic mixed function, the stream being fitted into using pump discharge in the nozzle jet-action mixed charge road in main pipeline Body, it is ensured that liquid stream can be well mixed under any flow velocity in main pipeline so that fully represented into the liquid stream in sampling loop The property of liquid in main pipeline, avoid sampling from only representing local feature and do not possess representativeness.The device can be real provided with controller Now to equipment in sampling loop (pump, sampling control valve, liquid separation triple valve) and operational factor (pressure, temperature, flow, sampling amount, Density, liquid level of sample reception tank etc.) real-time monitoring；And the instruction of higher level's master control system can be received at any time；According to supervisor Flow velocity in road improves or reduced sampling frequency；Ensure steady sampling system, safety, controlled operation.The device sampling loop is set There is a flowmeter, the flow velocity of liquid in real-time measure loop, using the flow velocity of liquid in loop as controlled parameter, pass through and sample control system The rotating speed of system control variable frequency pump realizes in sampling loop flow rate of liquid in flow velocity real-time tracking main pipeline.The device is provided with redundancy Sampling pump, sample reception tank, sampling control valve, filter, ensure the continuously available of system.The device is connected with main pipeline Place sets manual sampling valve also to carry out manual sampling operation to ensure that even if system can not work.

The device fills outdoor design (controller is mounted remotely from the non-anti-explosion area at scene) by sledge, and its degree of protection is IP65, explosive-proof grade EXdIIBT4, fully meet open-air atmosphere and live requirement of explosion proof；Sample treatment and the sampling pump of conveying are adopted With frequency conversion centrifugal pump, realize to bypass and the flow velocity of sampling loop and the control of pressure, it is met the requirement of standard；In device Porch sampling pump before be provided with redundant filter, it is ensured that the stability and reliability of the continuous operation of sampling pump；Taking Sample pump discharge sets check valve to prevent that liquid level flows back in bypass duct；Butterworth Hatch is respectively provided with the inlet and outlet of device, Cleaning uses external medium cleaning way, and structure arrangement is easy to handle and cleaned, and can be achieved not turning off and safeguards in the case of main pipeline； Equipped with related emptying, blowdown pipeline and valve in sampling loop, blowdown, shut-off can be carried out to the pipeline in device and equipment And emission treatment, it is easy to daily maintenance and maintenance；Temperature transmitter, pressure transmitter, flowmeter are provided with sampling loop, it is real When monitor the temperature of sampling loop, pressure, flow, it is ensured that sampling is carried out under reasonable conditions；It is provided with sample reception tank Weighing-appliance, whether for being alarmed when the liquid level superelevation in device, while it is accurate to monitor sample size acquirement in tank；Provided with safety Bleeder valve, when superpressure reach safety valve release value when, safety valve action, to sample reception loop and connect sample reception tank implement Safeguard protection；Pipeline and equipment in device are provided with constant temperature electrical heating and Insulation, it is ensured that the stream in on-line period device Body is not protected from environmental, enables the device in outdoor stable operation.Differential pressure switch is set to be used for sample train before and after filter The running status of system detection filter, judges whether filter blocks.

The utility model is applied to oil pipeline on-line period.This automatic sampling system is used for domestic project first, mainly Technical indicator exceedes domestic best level, has reached international same period advanced level.Pumped (conveying) medium sample is inherently improved to take The representativeness obtained, reduce trade dispute；Do not influenceed by Oil Production technique and transport oil condition change；It is not affected by human factors； Reduce the labor intensity of operating personnel.The technique of use, equipment, material and structure technology are advanced, design document component content and Depth meets the requirements.With it is with high content of technology, processing performance is advanced, technological process is reasonable, do not produce the pressure loss, be applicable difference Caliber and any range of flow.Good environmental benefit, economic benefit and social benefit are generated after the system self-operating, very The requirement that good satisfaction is built, produces and use, overall economic efficiency are significantly improved than built same type project, and transport Row is reliably, stably, efficient, safe.

Brief description of the drawings

Fig. 1 is the structural representation of oil pipeline on-line period device described in the utility model；

Wherein, 1- sampling probes, the manual sampling valves of 2-, 3- process valves A, 4,7,17,26,29,34,40,53,58, 60- electric tracing thermal insulation parts, 5- process valves B, 6- purge valve A, 8- bypass, 9- process valves C, 10- pressure gauge A, 11- mistake Filter A, 12- differential pressure switch A, 13- sampling pump A, 14- pressure gauge B, 15- process valve D, 16- check valve A, 18- process valve E, 19- pressure gauge C 20- filter Bs, 21- differential pressure switches B, 22- sampling pump B, 23- pressure gauge D, 24- process valve F 25- are mono- To valve B, 27- purge valves B, 28- process valve G, 30- process valve H, 31- nozzle 32- sampling loops, 33- sewage draining valves, 35- process valves I, 36- on-line densimeter, 37- process valves J, 38- process valve K, 39- emptying valve, 41- process valves L, 42- sampling control valve A, 43- process valve M, 44- process valve N, 45- sampling control valve B, 46- process valve O, 47- point Liquid triple valve, 48- relief valves, 49- sample reception tank A, 50- sample reception tank B, 51- weighing instrument A, 52- weighing instrument B, 54- process valves P, 55- pressure transmitter, 56- temperature transmitters, 57- flowmeters, 59- process valves Q, 61- process valve R, 62nd, 63,64,65,66,67,68,69,70,71,72,73,76- instrument cables, 74- controllers, 75- master control systems, 77- Spray circuits.

Embodiment

In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this Utility model, it is not used to limit the utility model.

A kind of oil pipeline on-line period device, as shown in figure 1, being provided with one section of bypass 8, the bypass on main pipeline 8 arrival end connects sampling probe 1, and the sampling probe 1 stretches into main pipeline center to main pipeline central lower 0.1D section position Put, wherein, D is the diameter of main pipeline, can so avoid influence of the tube wall to flow velocity and moisture content, the sample of extraction most represents Property.Sampling probe 1 is sequentially connected in series process valve A3 and process valve B5, and other catcher is dynamic between sampling probe 1 and process valve A3 Sampling valve 2, the entrance of the process valve B5 connection branch road A and branch road B, the branch road A is identical with branch road B settings, superfluous each other Remaining, wherein branch road A is sequentially connected in series process valve C9, pressure gauge A10, filter A11, sampling pump A13, pressure gauge from entrance B14, process valve D15 and check valve A16, branch road B are sequentially connected in series process valve E18, pressure gauge C19, filter from entrance B20, sampling pump B22, pressure gauge D23, process valve F24 and check valve B25, filter A11 both sides parallel connection differential pressure switch A12, The both sides parallel connection differential pressure switch B21 of filter B 20, the differential pressure switch A12, differential pressure switch B21 are through instrument cable Access Control Device 74.It is other between process valve B5 and branch road A, branch road B inlet connections to meet purge valve A6.Converge branch road A and branch road B outlet Into a pipeline, and process valve G28 and process valve H30 are sequentially connected in series after joint, are most accessed afterwards through the nozzle 31 Main pipeline.

The branch road A, branch road B joint and process valve G28 between it is other connect sampling loop 32, wherein, the sampling Loop 32 is sequentially connected in series process valve I35, on-line densimeter 36 and process valve K38, the process valve K38 connections from entrance Branch road C and branch road D entrance.Wherein, it is other between the entrance of sampling loop 32 and process valve I35 to connect sewage draining valve 33.Technique Pipeline F parallel connection technology the valves J37, the process valve J37 that valve I35, on-line densimeter 36 and process valve K38 are formed With connecing emptying valve 39 by the junction of pipeline F outlets.The branch road C is identical with branch road D setting, is mutually redundant, wherein propping up Road C is from entrance is sequentially connected in series process valve L41, sampling control valve A42 and process valve M43, branch road D are sequentially connected in series work from entrance Skill valve N44, sampling control valve B45 and process valve O46；The branch road C and branch road D outlet merges into a pipeline, and Be sequentially connected in series after joint pressure transmitter 55, temperature transmitter 56, flowmeter 57, purge valve B27, process valve Q59 and Process valve R61, finally imports main pipeline.Branch road C and branch road D both sides are parallel with one section of bypass line, the bypass line It is provided with process valve P54.

Branch road C and branch road D is connected together after sampled control valve A42 and sampling control valve B45 as pipeline E respectively, described Pipeline E entrance connection liquid separation triple valve 47, connects sample reception tank A49 after the liquid separation triple valve 47 and sample connects respectively Closed cans B50, sample reception tank A49 and sample reception the tank B50 are respectively placed on weighing instrument A51 and weighing instrument B52.Take Sample control valve A42 and sampling control valve B45 extracts medium the equipment that juxtaposition changed in sample receiver, full-bore design, Total cross-section interception, variable frequency control, high-frequency action (30 times/min), it is ensured that meet that frequency is proportional to flow, unit sample Product quantity obtains accurate.Sample reception tank A49 and sample reception tank B50 use full-closed structure, with fast connecting joint, peace Full bleeder valve, the pressure vessel that material is stainless steel.It is other between the entrance and liquid separation triple valve 47 of the pipeline E to connect safety relief Valve 48.

Sampling pump A13, on-line densimeter 36, weighing instrument A51, weighing instrument B52, sampling control valve A42, sampling control valve B45, liquid separation triple valve 47, pressure transmitter 55, temperature transmitter 56, flowmeter 57 by instrument cable access controller 74, The controller 74 accesses master control system through instrument cable.Flowmeter 57 selects mass flowmenter, and the degree of accuracy is high, and inside can not Dynamic component reduces maintenance workload, long lifespan, and can realize real-time dynamic pressure by the pressure transmitter 55 in sampling loop Compensation.Controller 74 is on-line period device " brain ", has multiple function：Cryptoguard；Monitoring sampling loop temperature, The parameters such as pressure, flow, sample reception tank liquid level；Control sampling frequency, it is ensured that proportional to main pipeline flow；Control frequency conversion from Heart pump rotating speed, reach flow, the purpose of pressure in control sampling loop；Control the flow direction of liquid separatnig valve；Equipment and power supply status prison Depending on, fault alarm；Communicated with higher level's master control system, receive higher level's master control system order and open, stop sampler, receive and supervise Depending on the flow status of main pipeline；And sampler parameter is uploaded into higher level's master control system.

The nozzle 31 is the hollow high intensity straight tube of bottom lock, is uniformly provided with along the outer wall of the hollow straight tube some Individual spray is empty, the straight tube straight cutting main pipeline bottom, makes whole pipeline beneficial to by the effect by pumping out liquid such as bottom deposit water Section, which reaches, to be sufficiently mixed, it is ensured that it is in office why not the flow velocity of profit, viscosity, unaffected under density；The bottom of the nozzle 31 Combined closely with main pipeline bottom, to resist moment of flexure caused by main pipeline internal cause Peak Flow Rate, and bear to trigger because of vortex Vibrations.

Between process valve A3 and process valve B5, process valve B5 and branch road A, branch road B inlet connections, check valve A16 and branch road A, branch road B outlet joint between, branch road A, branch road B outlet joint and process valve G28 between, work Between skill valve G28 and process valve H30, between the entrance and process valve I35 of sampling loop 32, process valve K38 and branch Road C, branch road D inlet connection between, branch road C, branch road D outlet joint and pressure transmitter 55 between, purge valve B27 Between process valve Q59, electric tracing thermal insulation part is equipped between process valve Q59 and process valve R61.

Sampling pump B22 on the sampling pump A13 and branch road B uses frequency conversion centrifugal pump, by controller control frequency conversion from The rotating speed of heart pump, reach the purpose of control sampling loop flow velocity and injection power.

Before the filter A11 and the redundancy of filter B 20 are arranged on sampling pump, it is provided with the metal screen in filter Magnetic absorption device, metallic residue and particle in institute's pumped (conveying) medium can be adsorbed well, ensure that the steady of filter and sampling pump Run calmly and extend its service life.

All pipelines of oil pipeline on-line period device described in the utility model and all devices of installation are integrated in Sledge is loaded onto, and pressure rating meets the requirement of design pressure.

Process valve I35, process valve J37, process valve K38, process valve L41, process valve M43, process valve N44, process valve O46, process valve P54 select 1 " 300#ANSI RF ball valves；

Process valve D15 and process valve F24 selects 3 " 300#ANSI RF ball valves；

Process valve C9, process valve E18, process valve G28 and process valve H30 select 4 " 300#ANSI RF balls Valve；

Process valve A3 and process valve B5 selects 6 " 300#ANSI RF ball valves；

Check valve A16 and check valve B25 selects 3 " 300#ANSI RF swing type check valves；

Process valve R61 selects 1 " 300#ANSI RF stop valves；

Sampling pump A13 and sampling pump B22 selects frequency conversion centrifugal pump, and entrance " 300#ANSI RF, is exported as 3 " 300# for 4 ANSI RF, maximum stream flow 400GPM, 380/3/60HZ；

" 300#ANSI RF basket filters, swing type bolt are fast from 4 " × 8 " × 4 for filter A11 and filter B 20 Speed opens closure；

Flowmeter 57 selects Rosement 1 " 300#ANSI RF mass flowmenters；

Sample control valve A42 and sampling control valve A45 select 1 " the electro-hydraulic bypass sampling control valves of 300#ANSI RF 210；

Relief valve 48 is from SS-4R3A types 1/4, and " pipe connects angle-style bleeder valve；

Sample reception tank A49 and sample reception tank A50 selects portable example receiving tank, maximum size： 5GAL；

Liquid separation triple valve 47 is made up of following sections：Changing Direction Type valve ferrule fitting SS-43- GXF4-51-SR, threeway Ball valve, spring return actuator and Changing Direction Type magnetic valve；

What on-line densimeter 36 was selected is " the 300#ANSI RF liquid densimeters of type 1 of Solartron 7845；

Pressure gauge A9, pressure gauge B15, pressure gauge C18, pressure gauge D24 selected ranges are 0-50Bar, and 1/2 " internal thread connects The pressure display unit connect；

Differential pressure switch A12 and differential pressure switch B21 selects the differential pressure switch with display function；

Pressure transmitter 55 and temperature transmitter 56 select Rosement product；

Control computer of the controller 74 from the models of OMNI 6000.After whole sampler sledge dress production and processing Anti-corrosion, the antirust treatment of correlation need be made, all process pipelines and equipment do electric tracing and isothermal holding.

Oil pipeline on-line period method is carried out based on on-line period device described above, comprised the following steps：

1) one section of bypass is provided with main pipeline, the arrival end of the bypass connects sampling probe, and the sampling probe connects Enter main pipeline, liquid enters via sampling probe to be bypassed；

2) pressure detecting is carried out by pressure gauge into the liquid of bypass；

3) liquid after pressure detecting is filtered and blowdown by filter；

4) filter both ends are parallel with pressure difference switch, and carry out pressure differential detection；

5) sampling pump, the sampled pump pressurization of liquid are connected to after filter；

6) sampling pump discharge is provided with pressure gauge, carries out pressure detecting again；

7) sampling pump discharge accesses sample loop and spray circuits, and liquid is sprayed into main pipeline by the spray circuits port of export through nozzle Interior, the liquid into sampling loop continues following scheme：

8) blowdown；

9) online Density Detection；

10) it is vented；

11) sample is taken, and sample is retained；

12) remaining liquid successively be responsible for after pressure detecting, temperature detection, flow detection by last import after taking sample Road；

Wherein, the pressure differential detection in step 4), the pressurization of the sampling pump in step 5), the online Density Detection in step 9), Sample in step 11) retains relevant control, the pressure detecting in step 12), temperature detection, flow detection and each send signal To controller, the controller receives the signal of higher level's control system.

Bypass entrance be provided with manual sampling valve, when bypass failure can not automatic sampling when, carried out afterwards manually in step 1) Sampling.

Bypass entrance and sampling loop exit are equipped with purge valve, and purge valve bypasses with the use of periodic cleaning at two And sampling loop.

The sampled pump of liquid is forced through two sampling pumps realization of parallel redundancy setting in step 5).

Blowdown is realized by being arranged on the sewage draining valve of sampling loop entrance in step 8), while the sewage draining valve is set In the minimum point of sampling loop.

Exhaust in step 10) is manually controlled by setting the emptying valve of sampling loop peak to realize.

Step 11) is：The signal open and close that the two sampling control valves set by redundancy receive controller act, and often move Make the sample of once taking-up fixed amount, its frequency changes with the changes in flow rate of main pipeline, and main pipeline flow signal comes from higher level Master control system；Sampling control valve parallel connection is followed by liquid separation triple valve, and sample is divided into by the order that liquid separation triple valve receives controller In two sample reception tanks, two sample reception tanks are all positioned on weighing instrument, and signal is uploaded controller by weighing instrument, according to sample The weight of product receiving tank carrys out whether correct and sample reception tank the liquid level of quantity of judgement sample acquirement, controls liquid separation threeway accordingly The flow direction of valve, complete to take sample by above procedure, and sample is retained.

In the present embodiment, using the method for on-line period device on-line period described in the utility model in flood-pot experiment process After be sampled calibrating, it is as follows：

Water filling

A) connection valve, filter, pressure gauge, pipeline, pump, stream are passed through in the upstream of sampler before Autosampler operation The equipment such as gauge, the water of dose known amounts is injected into main pipeline.

B) element of the water decanting point away from sampling system upstream, at the same need to be Jing Guo sampling system mixing equipment.

C) water injection rate generally accounts for the 1-5% of main pipeline rate-of flow at the appointed time, because this project system is being done The injection rate of the big needs of output oil amount is with regard to big during experiment, and can not be separated after injecting water, passed through on the premise of technical feasibility with customs, Commodity inspection is consulted, and injected water volume is adjusted to as 0.6% or so of pipe throughput rate.

D) water injection time is no less than 1 hour, to gather the water filling sample of abundance.

E) water is injected from pipeline bottom with certain speed, can not be produced other mix in injection process to product and be made With.The speed of medium and direction are identicals in the velocity attitude and main pipeline of water filling.

F the flowmeter accuracy for) measuring water volume is better than ± 2%.

Calibrating

Sampling calibrating carried out under conditions of worst, respectively before testing, test in, test after collect 3 samples. The sample that sampler collects 1 hour before water filling is operated, then regathers the sample of 1 hour in the injecting process, when all water fillings are situated between After matter is by sampler, then the sample that sampler receives 1 hour is operated, it is determined that containing before testing with the water in sample after test Amount, test between two moisture content values of gained no more than 0.1%.Water content in the sample obtained eventually through analytical sampling Judge the performance of whole sampling system with injecting the uniformity of water content, this is a percentage value, and the value exists It is the highest level of the degree of accuracy generally acknowledged in the world within 0.05%.This item purpose automatic sampling system degree of accuracy is examined through water filling This rank is reached.

The automatic sampling system of this Project design is as follows through flood-pot experiment verification result：Water content is through analysis in crude oil 0.0504% (sampling analysis), one hour water injection rate percentage of water filling (water for being measured according to flowmeter and defeated that is 0.6267% Oil mass is calculated), water content is obtained as 0.6684% by sampling analysis in test process, final sampling analysis and reality The deviation of water injection rate be -0.0087% (0.6684-0.6267-0.0504), this meets the requirement of international standard highest level. The system is by the use more than 8 years, and stable, since putting into operation, sampling 10L or so, operates 10000 daily daily Repeatedly, primary sample 1mL is often acted.

This example improves credibility, accuracy, repeatability, the stability of on-line period system through on probation, beneficial in the future Safeguard, many-sided advantage such as maintenance, and it is compact-sized, installation is simple, convenient transportation, it is possible to achieve outdoor sledge installing is put, and is saved Space and operation operation room are saved.

Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.

Claims (8)

1. a kind of oil pipeline on-line period device, it is integrated in sledge and loaded onto, it is characterised in that one section is provided with main pipeline Bypass (8), the arrival end of the bypass (8) connects sampling probe (1), and the sampling probe (1) stretches into main pipeline center to supervisor Road central lower 0.1D position, D are the diameter of main pipeline；Sampling probe (1) is sequentially connected in series process valve A (3) and technique valve Door B (5), the entrance of process valve B (5) the connection branch road A and branch road B, the branch road A is identical with branch road B settings, wherein propping up Road A is sequentially connected in series process valve C (9), pressure gauge A (10), filter A (11), sampling pump A (13), pressure gauge B from entrance (14), process valve D (15) and check valve A (16), branch road A and branch road B outlet merge into a pipeline, and after joint Process valve G (28) and process valve H (30) are sequentially connected in series, most accesses main pipeline through nozzle (31) afterwards；

It is other between the branch road A, branch road B joint and process valve G (28) to connect sampling loop (32), wherein, the sampling Loop (32) is sequentially connected in series process valve I (35), on-line densimeter (36) and process valve K (38), the technique valve from entrance Door K (38) connections branch road C and branch road D entrance；The branch road C is identical with branch road D setting, wherein branch road C from entrance successively Concatenation process valve L (41), sampling control valve A (42) and process valve M (43), branch road D are sequentially connected in series process valve N from entrance (44) control valve B (45) and process valve O (46), is sampled；The branch road C and branch road D outlet merge into a pipeline, and Pressure transmitter (55), temperature transmitter (56), flowmeter (57), purge valve B (27), process valve are sequentially connected in series after joint Q (59) and process valve R (61), finally imports main pipeline；

Branch road C and branch road D distinguishes sampled control valve A (42) and sampling control valve B (45) is connected together as pipeline E, the pipe Line E entrance connection liquid separation triple valve (47), sample reception tank A (49) and sample are connected after the liquid separation triple valve (47) respectively Product receiving tank B (50), the sample reception tank A (49) and sample reception tank B (50) are respectively placed in weighing instrument A (51) and weighed On instrument B (52)；

Sampling pump A (13), on-line densimeter (36), weighing instrument A (51), weighing instrument B (52), sampling control valve A (42), sampling control Valve B (45) processed, liquid separation triple valve (47), pressure transmitter (55), temperature transmitter (56), flowmeter (57) are by instrument cable Access controller (74), the controller (74) access master control system (75) through instrument cable.

2. oil pipeline on-line period device according to claim 1, it is characterised in that the nozzle (31) is hollow straight Pipe, the bottom lock of the nozzle (31) and is combined with main pipeline bottom, is uniformly provided with along the outer wall of the hollow straight tube some Individual spray is empty.

3. oil pipeline on-line period device according to claim 1, it is characterised in that sampling probe (1) and technique valve The other dynamic sampling valve (2) of catcher between door A (3)；

It is other between the entrance and liquid separation triple valve (47) of the pipeline E to connect relief valve (48).

4. oil pipeline on-line period device according to claim 1, it is characterised in that

It is other between process valve B (5) and branch road A, branch road B inlet connections to meet purge valve A (6)；

It is other between the entrance and process valve I (35) of sampling loop (32) to connect sewage draining valve (33).

5. oil pipeline on-line period device according to claim 1, it is characterised in that

Filter A (11) both sides parallel connection differential pressure switch A (12), the differential pressure switch A (12) is through instrument cable access controller (74)；

The pipeline F parallel connection technology valve J (37) that process valve I (35), on-line densimeter (36) and process valve K (38) are formed, The process valve J (37) by the junction of pipeline F outlets with connecing emptying valve (39)；

Branch road C and branch road D both sides are parallel with one section of bypass line, and the bypass line is provided with process valve P (54).

6. oil pipeline on-line period device according to claim 1, it is characterised in that process valve A (3) and technique valve Door B (5), between process valve B (5) and branch road A, branch road B inlet connections, check valve A (16) and branch road A, branch road B outlet Between joint, between branch road A, branch road B outlet joint and process valve G (28), process valve G (28) and process valve Between H (30), between the entrance and process valve I (35) of sampling loop (32), process valve K (38) and branch road C, branch road D Between inlet connection, between branch road C, branch road D outlet joint and pressure transmitter (55), purge valve B (27) and technique valve Between door Q (59), electric tracing thermal insulation part is equipped between process valve Q (59) and process valve R (61).

7. oil pipeline on-line period device according to claim 1, it is characterised in that the sampling pump A (13) and branch Sampling pump B (22) on the B of road uses frequency conversion centrifugal pump.

8. oil pipeline on-line period device according to claim 1, it is characterised in that the filter A (11) and branch The metal screen in filter B (20) on the B of road is provided with magnetic absorption device.