CN2656983Y - Solid dust sampler for pipeline - Google Patents
Solid dust sampler for pipeline Download PDFInfo
- Publication number
- CN2656983Y CN2656983Y CN 200320122090 CN200320122090U CN2656983Y CN 2656983 Y CN2656983 Y CN 2656983Y CN 200320122090 CN200320122090 CN 200320122090 CN 200320122090 U CN200320122090 U CN 200320122090U CN 2656983 Y CN2656983 Y CN 2656983Y
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- pressure
- sampling
- sampling probe
- pipeline
- gate valve
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Abstract
The utility model is a solid dust sampling device in pipes, in particular to gas pipes. The utility model is characterized in that a sampling probe 14, the front end of which is direct hook-shaped, is internally communicated with an internal press ring cavity in the pipe wall of a diffusion section by a plurality of internal pressure holes and externally communicated with an external press ring cavity in the pipe wall of the diffusion section by a plurality of external pressure holes. The internally and externally press ring cavities are respectively provided with a pressure measurement hole communicated with a sampling pressure 10 and a sampling pressure 11 both of which are undertaken with the sampling probe 14 to be packaged in a sleeve 22 which is then inserted into a small diameter branch pipe 2 on the tested pipe 1 and connected with a flange 17, a gate valve 3, a gate valve 4 and a sealing equipment. The posterior part of the sampling probe 14 is connected with a transmission device. The equipment can realize isokinetic sampling, has a simple device and avoids that the pressure measurement hole can not work because of blocking, and besides the equipment increases sampling accuracy, makes operation simple, safe and reliable and is suitable for high-pressure pipelines.
Description
Technical field
The utility model is the device of solid dust sampling in the gas pipeline.Relate to piping system and other class fields of measurement not to be covered.
Background technology
Because valve, instrument and large-scale compressor etc. on solid impurities such as the iron rust in the natural gas line, the silica sand meeting heavy wear pipeline, thereby influence the safe and reliable operation of whole pipeline, the wearing and tearing of instrument simultaneously also can cause the bigger error in dipping of rock gas, so dust arrester all is housed on the gas transmission line.Gas transmission line is generally removed the bigger particle of diameter with cyclone separator at present, the demanding occasion of gas purification is then added one-level again consider the core filtrator.Because splitter and filter is under high pressure worked, under the big condition of gas consumption fluctuation, the conventional moving method of sampling such as grade of estimating separating property is not suitable for condition of high voltage, make the design department of splitter and filter and separation efficiency that use department can't determine condition of high voltage and outlet size distribution situation, can only select separation equipment for use according to the data under the condition of normal pressure.
The present sampling system of using mainly is divided into two big classes: the one, and the common sampling system of the post-sampling that tests the speed earlier; The 2nd, the combined type sampling system.When using the sampling of common sampling system, at first to measure ducted speed with speed measuring devices such as pitot tubes, then according to etc. the principle of moving sampling, diameter by pipe flow speed and sampling mouth calculates corresponding extraction flow, this method of sampling operating process is loaded down with trivial details, easily cause natural gas leaking, be not suitable for dust detection in the pressure piping.The combined type sampling system then is speed measuring device to be combined with the sampling mouth put into pipeline, at first the speed of surveying according to speed measuring device is constantly adjusted extraction flow, flow velocity is equated, moving samplings such as realization reach the purpose of measuring dust concentration and size-grade distribution.Though combined type sampling system sampling process is simple relatively, only need probe is put into pipeline, sealing problem easily solves, and also is suitable for pressure piping, and deficiency is that structure is quite complicated.It is to connect vacuum pump behind the sampling mouth, extracts the gas in the pipeline, connects well heater again sample gas is heated; By the temperature in the thermocouple measurement pipeline, the absolute pressure in the pressure transducer measuring channel is measured dynamic pressure and differential static pressure with pitot tube simultaneously.Convert temperature, absolute pressure and pressure reduction to digital signal afterwards and send digital microbarograph to, digital microbarograph passes to computing machine with the result, produce control signal by computing machine and issue flow regulator, the interior gas velocity of sampling air flow speed and pipeline is equated, carry out the isokinetic sampling.So complicated system has not only increased the cost that drops into, and brings very big trouble also for the maintenance of equipment, maintenance.
In recent years,, make to measure to become simple, convenient, accurately, improved a step technically in the cigarette of cement kiln cellar for storing things tail, flue and atmospheric environment, the internal diameter sampling pipe has appearred becoming in dust in measuring isokinetic sampling's technology.As " static balance flue dust isokinetic sampling pipe " (patent No. ZL91211428.2) that authorized on October 23rd, 1991 disclose on the mouth of sampling, be provided with in pressure tap and measuring pressure from outside hole get in the structure of external pressure.But this pressure tap is by the direct pressure in a hole, if any big grit, easily results in blockage, and can't proceed to measure, and sampling contingency is big, causes measuring accuracy not high, generally can only reach 5～7%; These patents are only applicable to environment under low pressure simultaneously, and The Application of Technology has very big limitation.
The utility model content
The purpose of this utility model is a kind of can sample to moving conditions such as solid dust in the pipeline carry out and sampling apparatus little to the disturbance of pipeline inner fluid, that sampling is accurate, safe and reliable of design.
Guarantee again in the pipeline to the solid dust sampling accurately, will guarantee that at first sampling carries out under waiting condition (being that sampling air flow speed equals gas velocity in the pipeline).The technical scheme that the utility model proposed also is to connect a diffuser behind the valve inducer of sampling probe, make to enter valve and by diffuser its speed is reduced to gas velocity in the pipeline and equate at the air-flow that inducer increases flow velocity, be applicable to pressure piping, and on the structure of pressure tap, made significant improvement.It constitutes as shown in Figure 1.The structure of sampling probe 14 such as Fig. 2, Fig. 3 and shown in Figure 4.Front end becomes straight hook-shaped tubulose sampling probe 14 that the diffuser of large diameter is arranged behind the little internal diameter inducer of mouth, and in the tube wall of diffuser, there is one by pressing inner pressure ring chamber and external pressure ring cavity that is interlinked to the outside by a plurality of external pressures hole and sampling probe 14 that communicates in hole and the sampling probe 14 in a plurality of, inside and outside pressure ring chamber respectively has a pressure tap to communicate with pressure pipe 10,11, with sampling probe 14 and two pressure pipes 10,11 two ends, the sleeve 22 back cap seals of packing in the lump, two pressure pipes, 10,11 rear and front ends are stretched out outside the capping, and the sampling probe mouth of front end also exposes outside.To sampling probe 14 an anterior pipe flange 17 that are connected with that insert on the tested pipeline 1 of sleeve 22 be housed, in the minor diameter arm 2 of gate valve 3,4 and packoff, gearing is equipped with at the rear portion.Key of the present utility model is the structure of sampling probe 14.It is to enlarge internal diameter to certain-length behind the inducer of uniform internal diameter, promptly connects one section diffuser behind the inducer.The internal diameter of the internal diameter of its diffuser and length and inducer has certain relation, is generally determined by experiment.According to hydromechanical knowledge, when a small-bore pipe was inserted in the fluid, the flow rate of fluid that enters tubule will be accelerated, pressure reduces; If enlarge internal diameter behind small-bore pipe, its flow velocity reduced again after fluid entered the pipeline section of expansion so, and pressure then increases (so being referred to as diffuser) again.If size Selection is good, the outer hydrodynamic pressure of the hydrodynamic pressure that can accomplish diffuser fully and pipe is close or equate, and then the purpose of moving sampling such as can reach.Its do not wait coefficient can reach ± 1%.Pressure in sampling probe 14 is realized by inside and outside pressure ring chamber and pressure pipe 10,11.As shown in Figure 3, Figure 4, the inner pressure ring chamber be in the diffuser tube wall of sampling probe 14, have one outer isolated with pipe and by 2～6 equally distributed in the toroidal cavity that communicates with diffuser in the sampling probe of pressure hole.The external pressure ring cavity be in the diffuser tube wall of sampling probe 14, have one with diffuser isolated and toroidal cavity that be interlinked to the outside by 2～6 equally distributed external pressure holes and sampling probe 14.Inside and outside pressure ring chamber respectively has a pressure tap to communicate with pressure pipe 10,11.The diameter of inside and outside pressure hole and pressure tap is between 0.5～1.5mm.It is for guaranteeing that measured pressure is the pressure mean values of circumferencial direction that inside and outside pressure Kong Jun gets 2～6 holes one, but filtration avoids causing the dust possibility of jamming again.Though inside and outside pressure hole multiple pressure power mean value more is accurate more, filter effect is good more, too much also need not, generally get 3 and get final product, pressure mean values is accurate, filtration is also much of that.As for interior, the manufacturing process of external pressure ring cavity is also not so difficult, to press hole and three external pressure holes in three is example, one thick-walled pipe car after the angle lap of mouth is thin, again at relevant position car twice groove, in the groove of a ring cavity, circumferentially inwardly make a call to a hole every 120 °, thereafter 2 pipeline sections of each close-fitting trap make this two groove be sealed to two ring cavities outside the twice groove, on the pipeline section of cover external pressure ring cavity, also make a call to a hole every 120 °, the thin same wringing fit of pipeline section of car puts pipeline section afterwards simultaneously, make three pipeline section external diameters that put equate that promptly the wall thickness of three pipeline sections equates with the thickness that car goes.Also to coincide between certain three pipeline sections, can not leak gas.The packoff of this device is to connect outside the conventional equipment that props up pipe flange 17 and sealing gate valve 3 to connect an insurance gate valve 4 by its flange 18 again on the smaller branch pipe 2 that tested pipeline is drawn, and by its flange 19 an even pipeline section and seal flange I 20 connection packoffs, connect a seal ring sheet 23 by seal flange II 21 at last, the sealing device is conventional mechanical seal, promptly is added with encapsulant in the gap between packoff and sleeve 22.To draw arm stressed little in order to make, and there is the arm bracing frame 7 that is connected on the base for supporting 15 at the pipeline section place behind insurance gate valve 4.The gearing that is positioned at sampling probe 14 afterbodys is that a stepper motor 13 and drive screw locating rack 16 are installed on base for supporting 15, pass screw, sleeve bracing frame 8 and the locating rack 16 of movable stand 9 lower ends of gearing with 13 drive screws that are connected 12 of stepper motor, movable stand 9 tops porose with sleeve 22 wringing fits.The hole on sleeve bracing frame 8 tops and sleeve 22 wringing fits, lower end have screw to cooperate with drive screw 12.When starting stepper motor 13, drive screw 12 rotates, and makes movable stand 9 move left and right, is being with sampling probe 14 just can to put in or withdraw from like this.
Embodiment
Embodiment: general structure as shown in Figure 1.The internal diameter of sampling probe 14 is 6mm, diffuser internal diameter 6.7mm, external diameter 20mm; Inside and outside pressure ring chamber is wide 3mm, encircles high 2mm, inside and outside pressure bore dia 1mm, pressure tap diameter 2mm, pressure pipe diameter 8mm, wall thickness 4mm, sleeve 22 diameter 30mm; Draw an external diameter of pipe 70mm, internal diameter 50mm, sealing gate valve 3 and insurance gate valve 4 are selected DN65243WF-100 for use, and stepper motor is selected 45BF008 for use, drive screw 12 diameter 10mm.
So the technical parameter of the sampling apparatus of design is: variable speed coefficient＜2.5%, can survey the maximum 6Mpa of pipeline pressure, and measure concentration range 2～500mg/m
3, measuring error is less than 5%.
The course of work of this sampling apparatus is: will seal gate valve 3 before the sampling and close, and the flange 18 that will link on this gate valve takes off, then sampling apparatus and bracing or strutting arrangement are connected on the insurance gate valve 4, for avoiding the impact of gases at high pressure to equipment, to seal gate valve 4 slowly opens, treat to start gearing behind the steady air current, drive drive screw 12 promotion sampling probes 14 by stepper motor 13 and push in the pipeline opening, just can sample.
The utility model has been put diffuser and inside and outside pressure ring chamber, a plurality of inside and outside pressure hole and inside and outside pressure pressure pipe 11,10 owing to pipe in the sampling of sampling probe 14 adds, moving sampling such as both can realize, can avoid pressure tap to stop up again can't work, and improved the accuracy of sampling, and equipment is very simple.The two pressure pipes 11,10 that conduct inside and outside static pressure are attached to the sleeve of packing on the sampling probe 14, by the sealing of two gate valves and packoff, and introduction pipe then, both good seal had improved security again, was applicable to high pressure gas pipeline fully.
Description of drawings
Solid dust sampling apparatus overall pattern in Fig. 1 pipeline
Fig. 2 sampling probe structural drawing
Fig. 3 inner pressure ring chamber cut-open view
Fig. 4 external pressure ring cavity cut-open view
1-pipeline, 2-arm wherein
3-sealing gate valve 4-insurance gate valve
5-encapsulant, 6-packoff
7-arm bracing frame, 8-probe support frame
9-movable stand, 10-external pressure pressure pipe
11-interior pressure pressure pipe 12-drive screw
13-stepper motor, 14-sampling probe
15-base for supporting, 16-locating rack
17-pipe flange 18-seal gate valve flange
19-insurance gate valve flange, 20-seal flange I
21-seal flange II, 22-probe sleeve
23-seal ring sheet
Claims (5)
1, solid dust sampling apparatus in a kind of pipeline, comprise sampling probe [14] and gearing, behind the inducer of the inherent little internal diameter of sampling probe [14] that front end one-tenth is straight hook-shaped bigbore diffuser is arranged, it is characterized in that in the tube wall of diffuser, having one by pressing inner pressure ring chamber and external pressure ring cavity that is interlinked to the outside by a plurality of external pressures hole and sampling probe [14] that communicates in hole and the sampling probe [14] in a plurality of, in, the external pressure ring cavity respectively has a pressure tap and pressure pipe [10], [11] communicate, two pressure pipes [10], [11] close up to be encapsulated in to insert in the sleeve [22] with sampling probe [14] and be connected with flange [17] on the tested pipeline [1], sealing gate valve [3], in the minor diameter arm [2] of insurance gate valve [4] and packoff, sampling probe [14] rear portion is connected with gearing.
2, solid dust sampling apparatus in the pipeline according to claim 1, it is characterized in that described inner pressure ring chamber be have in the diffuser tube wall sampling probe [14] in one with pipe outside completely cut off and by 2～6 equally distributed in the toroidal cavity that communicates with diffuser in the sampling probe [14] of pressure hole; Described external pressure ring cavity be have in the diffuser tube wall in sampling probe [14] one with the diffuser inner chamber isolated and toroidal cavity that be interlinked to the outside by 2～6 equally distributed external pressure holes and sampling probe [14]; Inside and outside pressure ring chamber is respectively pressed hole and centre, 2 external pressure holes to open a pressure tap in 2 and is connected and communicates with pressure pipe [10], [11].
3, solid dust sampling apparatus in the pipeline according to claim 2 presses the diameter of hole, external pressure hole and pressure tap between 0.5～1.5mm in its feature is described.
4, solid dust sampling apparatus in the pipeline according to claim 1, it is characterized in that described packoff is for being connect an insurance gate valve [4] and connected a pipeline section and seal flange I[20 by its flange [19] by the flange [18] of this valve afterwards at arm [2], flange [17], sealing gate valve [3]] the connection packoff, at last by seal flange II[21] company's one seal ring sheet [23], between packoff and sleeve [22], encapsulant [5] is housed, and at the seal flange I[20 after insurance gate valve [4]] under have the arm bracing frame [7] that is connected on the base for supporting [15] to support.
5, solid dust sampling apparatus in the pipeline according to claim 1, it is characterized in that described gearing is for going up the locating rack [16] that a stepper motor [13] and drive screw [12] are installed at base for supporting [15], the drive screw [12] that is connected with stepper motor [13] axle passes screw, sleeve bracing frame [8] and the locating rack [16] of movable stand [9] lower end of gearing, porose and sleeve [22] wringing fit in movable stand [9] top, the hole on sleeve bracing frame [8] top and sleeve [22] wringing fit, lower end have screw to cooperate with drive screw [12].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320122090 CN2656983Y (en) | 2003-11-21 | 2003-11-21 | Solid dust sampler for pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320122090 CN2656983Y (en) | 2003-11-21 | 2003-11-21 | Solid dust sampler for pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2656983Y true CN2656983Y (en) | 2004-11-17 |
Family
ID=34348526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320122090 Expired - Lifetime CN2656983Y (en) | 2003-11-21 | 2003-11-21 | Solid dust sampler for pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2656983Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334349B (en) * | 2007-06-27 | 2010-12-15 | 中国石油天然气股份有限公司 | Inner powder dust on-line checking method for high pressure gas pipeline and its device |
| CN102218657A (en) * | 2011-03-31 | 2011-10-19 | 武汉市天虹仪表有限责任公司 | Low-concentration sampling nozzle binding apparatus |
| CN103048209A (en) * | 2011-10-17 | 2013-04-17 | 中国石油天然气集团公司 | Testing method for abrasion of coating dust in full-size pipeline |
| CN103513053A (en) * | 2012-06-29 | 2014-01-15 | 中国科学院大连化学物理研究所 | Device for synchronously adjusting direction of pitot tube sampling hole and sampling gun in rotating mode |
| CN105784549A (en) * | 2016-04-08 | 2016-07-20 | 中国石油大学(北京) | Optical sensor configuration method and device applicable to high-pressure working condition |
| CN106442006A (en) * | 2016-10-10 | 2017-02-22 | 天津大学 | Method and equipment for collecting indoor dust |
| CN107014860A (en) * | 2017-04-19 | 2017-08-04 | 哈尔滨工程大学 | Bottomhole pressure boiling is evaporated and is evaporated the experimental provision of rear hot-working hydraulic characteristic and is evaporated method of discrimination |
-
2003
- 2003-11-21 CN CN 200320122090 patent/CN2656983Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334349B (en) * | 2007-06-27 | 2010-12-15 | 中国石油天然气股份有限公司 | Inner powder dust on-line checking method for high pressure gas pipeline and its device |
| CN102218657A (en) * | 2011-03-31 | 2011-10-19 | 武汉市天虹仪表有限责任公司 | Low-concentration sampling nozzle binding apparatus |
| CN102218657B (en) * | 2011-03-31 | 2013-06-12 | 武汉市天虹仪表有限责任公司 | Low-concentration sampling nozzle binding apparatus |
| CN103048209A (en) * | 2011-10-17 | 2013-04-17 | 中国石油天然气集团公司 | Testing method for abrasion of coating dust in full-size pipeline |
| CN103048209B (en) * | 2011-10-17 | 2014-11-26 | 中国石油天然气集团公司 | Testing method for abrasion of coating dust in full-size pipeline |
| CN103513053A (en) * | 2012-06-29 | 2014-01-15 | 中国科学院大连化学物理研究所 | Device for synchronously adjusting direction of pitot tube sampling hole and sampling gun in rotating mode |
| CN105784549A (en) * | 2016-04-08 | 2016-07-20 | 中国石油大学(北京) | Optical sensor configuration method and device applicable to high-pressure working condition |
| CN106442006A (en) * | 2016-10-10 | 2017-02-22 | 天津大学 | Method and equipment for collecting indoor dust |
| CN107014860A (en) * | 2017-04-19 | 2017-08-04 | 哈尔滨工程大学 | Bottomhole pressure boiling is evaporated and is evaporated the experimental provision of rear hot-working hydraulic characteristic and is evaporated method of discrimination |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131121 Granted publication date: 20041117 |