CN2653472Y - Anti-block standard impact tube - Google Patents
Anti-block standard impact tube Download PDFInfo
- Publication number
- CN2653472Y CN2653472Y CN 200320115566 CN200320115566U CN2653472Y CN 2653472 Y CN2653472 Y CN 2653472Y CN 200320115566 CN200320115566 CN 200320115566 CN 200320115566 U CN200320115566 U CN 200320115566U CN 2653472 Y CN2653472 Y CN 2653472Y
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- pressure
- pitot tube
- static pressure
- air
- tube
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Abstract
The utility model discloses an anti-blocking standard pitot tube, belonging to air pressure testing apparatus, which is particular in that the axial center of the pressure fetching head is provided with an air intake pipe cavity with a comparatively large opening and communicated with a total pressure connection channel pipe; while the back of the pressure fetching head is provided with an air room communicated with a static pressure connection channel pipe; moreover, the place at the air room front and close to the pressure fetching head opening end is provided with an axial fraising for the static pressure air intake, and the portion between the fraising opening width and the pressure fetching head diameter is 1:20 to 1:8. Besides, the fraising has one to a plurality of small holes communicating with the air room. Having a reasonable design and a craft concept, and adopting the same pressure fetching method as the former standard pitot tube, the utility model is able to synchronously test the total pressure, the static pressure and the dynamic pressure, promising a high measuring accuracy, remarkably showing the anti-blocking ability of the S shaped pitot tube. The anti-blocking standard pitot tube is extensively applicable to various pipes in server pollution, providing an accurate test result.
Description
Technical field
The utility model belongs to a kind of piezometry instrument, especially a kind of piezometry instrument of gas.
Background technology
At environmental protection, metallurgy, building materials, chemical industry, electric power ... etc. in the industry, in order to carry out environmental evaluation, device design and transformation, operating mode technical Analysis etc., the thermal parameter that all needs measuring channel, wherein one promptly is the mensuration of gaseous tension, and this piezometry can be in order to flow rate of the pressure distribution of analysis conduit, the pressure loss, gas etc.The pressure instrument of finishing surveying work is pitot tube normally, and pitot tube divides two kinds: standard pitot tube and S type pitot tube.Standard pitot tube is a double-deck pipe with one heart that curves 90 °, and its openend communicates with interior pipe, is used for measuring total head; Near on the outer tube wall of tube head, have a circle hole, be used for measuring static pressure.The standard pitot tube correction coefficient is approximately equal to 1, and the standard pitot tube gaging hole is very little, and is easily blocked when dust particle concentration is big in the chimney breast, and therefore, this pitot tube only is applicable in the pipeline that cleans and uses.S type pitot tube is to be composed in parallel by two identical metal tubes, measuring junction has two opposite openings of direction, during mensuration, the opening of object gas flow records is equivalent to total head, dorsad air-flow be equivalent to static pressure because the gauge head airflow influence, pressure that records and actual value have bigger error, particularly static pressure error is bigger, and S type pitot tube correction coefficient is generally between 0.82-0.85.The advantage of S type pitot tube is that the mouth of pipe is bigger, is difficult for being stopped up by grit, and therefore, S type pitot tube is applicable to the pollution source pipeline and to the less demanding occasion of measuring accuracy.Standard pitot tube and S type pitot tube in use all are subjected to certain limitation.Still the function and the degree of accuracy that had not both had standard pitot tube have the pitot tube appearance that S type pitot tube is difficult for blocked advantage again.
Summary of the invention
The purpose of this utility model provides a kind of anti-blocking standard pitot tube, and it is measuring channel total head, static pressure and dynamic pressure truly, and the measuring accuracy height has certain anti-blocking ability simultaneously again.
The purpose of this utility model is achieved in that anti-blocking standard pitot tube is the same with common standard pitot tube, the pressure head is responsible for into 90 degree bendings with pitot tube, pitot tube is provided with two parallel mini diameter tubes in being responsible for, they are respectively total head interface channel pipe and static pressure interface channel pipe, being positioned at two of two interface channel pipe afterbodys connects mouth and joins with pressure gauge respectively, the opening draft tube that is connected with total head interface channel pipe is arranged on a pressure front end axial centre, special feature of the present utility model is: the pressure head is provided with a ring cutting groove radially that is used for the static pressure air inlet, this ring cutting groove is arranged on the front of the air chamber that is connected with static pressure interface channel pipe, have 1 to communicate with air chamber to a plurality of apertures in the ring cutting groove, a ring cutting channel opening width and pressure diameter ratio is 1: 20-1: 4; Optimum ratio is 1: 10-1: 8.The opening draft tube that is positioned at a pressure center is an opening air inlet tube chamber big than common standard pitot tube size.It has bigger dust capaciting ability, the difficult obstruction.
The utility model is reasonable in design, is skillfully constructed.Ways of measure pressure is the same with the primary standard pitot tube, can measure total head, static pressure, dynamic pressure simultaneously, the measuring accuracy height.The axially open of pressure head is the air intake opening of total head, directly spreads out of to pressure gauge by pipe, records total head; Tube head radial loop grooving is the air intake opening of static pressure, and the direction of static pressure is perpendicular to the chimneying direction, and static pressure imports air chamber into by radial loop grooving endoporus, and the pipe through communicating with air chamber spreads out of to pressure gauge, records static pressure.Connect mouth with two and be connected on simultaneously on the differential pressure gauge, can measure dynamic pressure by certain way.Air chamber of the present utility model has than the big dust capaciting ability of S type pitot tube, shows the anti-stifled ability that is better than S type pitot tube.This anti-blocking standard pitot tube can be widely used in various with serious pollution pipelines, and can obtain measurement result accurately.
Description of drawings
Accompanying drawing 1 is anti-blocking standard pitot tube structural representation;
Accompanying drawing 2 is anti-blocking standard pitot tube pressure header structure synoptic diagram;
Accompanying drawing 3 is the A-A face structural representation of accompanying drawing 2;
Accompanying drawing 4 is anti-blocking standard pitot tube on-line monitoring synoptic diagram.
Accompanying drawing acceptance of the bid keep the score state as follows: 1---the pressure head; 2---front connector; 3---bend connector; 4---total head interface channel pipe; 5---the back joint; 6---be responsible for sleeve pipe; 7---the shell fragment assembly; 8---static pressure interface channel pipe; 9---extension pipe; 10---articulation; 11---total head connects mouth; 12---static pressure connects mouth; 13---static pressure air inlet circuit; 14---static port; 15---air chamber; The 16--flue; 17---the total head air admission hole; 18---the total head mouth; 19---air-flow; 20---two position two-way valve; 21---air compressor machine; 22---survey the static pressure pressure gauge; 23---differential pressure gauge; 24---survey the total head pressure gauge; 25---the air inlet tube chamber; Ps---static pressure; Pd---dynamic pressure; P---total head.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.It is similar in shape to the common standard pitot tube that accompanying drawing 1 demonstrates pitot tube of the present utility model, and the pressure head of common standard pitot tube is a bit larger tham in pressure of the present utility model 1.In fact its most of design feature too, ways of measure pressure and measure also basically identical of degree of accuracy.Special feature of the present utility model is that its pressure 1 is a kind of very novel unique design, and accompanying drawing 2,3 has clearly illustrated their design feature.The central opening of pressure head is a total head air admission hole 17, and air-flow enters the straight-through total head interface channel pipe 4 in air inlet tube chamber 25 backs thus, connects mouth 11 by total head again and spreads out of to pressure gauge, records total head.Radial loop grooving 13 in the pressure 1 is air intake openings of static pressure, the direction of static pressure is always perpendicular to the chimneying direction, static pressure imports air chamber 15 into by radial loop grooving 13 endoporus 14, and the static pressure interface channel pipe 8 through communicating with air chamber spreads out of to pressure gauge, records static pressure.As long as connecing mouth with two is connected on the differential pressure gauge simultaneously by certain way, can record dynamic pressure.
This anti-blocking standard pitot tube has overcome the easily stifled shortcoming of primary standard pitot tube, more can show its anti-blocking ability when level is installed, because when level is installed, grit is under action of gravity, can come off automatically, even a hole plug is arranged, but because the big still pressure transmission of other hole of air chamber.The anti-blocking of this anti-blocking standard pitot tube can will be got well by force rate S type pitot tube, if there is grit to pile up in pipe, also can result in blockage after the time is long slightly in S type pitot tube.S type pitot tube may just also not monitored at a point and stopped up, need extract pipeline repeatedly out and remove grit outward.And this anti-blocking standard pitot tube also can be competent at monitoring preferably in same rugged environment.Accompanying drawing 4 has shown that this anti-blocking standard pitot tube is contained in the situation when being fixed on line monitoring system, and it can be by computer control, and regularly switching gas circuit is closed the gas circuit of leading to pressure transducer, and the protection pressure transducer starts the grit that deposition is removed in the air compressor machine blowback.
The structure of this anti-blocking standard pitot tube is according to user's needs, can make fixed length, also can make mountable portable anti-blocking standard pitot tube.The each several part size difference to some extent of the anti-blocking standard pitot tube that structure is different, or some part form is different, but head construction is consistent.Anti-blocking standard pitot tube is the same with S type pitot tube with standard pitot tube, need proofread and correct in wind-tunnel, obtains correction coefficient.
Anti-blocking standard pitot tube head dimensions is bigger, and posted sides pipeline is required opening big (being no more than Φ 138); Processing request is higher.
Claims (4)
1, a kind of anti-blocking standard pitot tube, the pressure head is responsible for into 90 degree bendings with pitot tube, pitot tube is provided with two parallel mini diameter tubes in being responsible for, they are respectively total head interface channel and static pressure interface channel, two interface channel pipe afterbodys are respectively arranged with the mouth that connects that is connected with pressure gauge, it is characterized in that: pressure head (1) is provided with a radial loop grooving (13) that is used for the static pressure air inlet, ring cutting groove (13) is arranged on the front of the air chamber (15) that is connected with static pressure interface channel pipe (8), and porose (14) communicate with air chamber (15) in the ring cutting groove (13).
2, according to the described pitot tube of claim 1, it is characterized in that: ring cutting groove (a 13) A/F and a pressure diameter ratio are 1: 20-1: 4; Optimum ratio is 1: 10-1: 8.
3, pitot tube according to claim 1 is characterized in that: the number that is arranged on the hole (14) that communicates with air chamber (15) in the ring cutting groove (13) is 1 to a plurality of.
4, pitot tube according to claim 1 is characterized in that: the opening draft tube that is arranged on a pressure axial centre is the size opening air inlet tube chamber (25) big than the common standard pitot tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320115566 CN2653472Y (en) | 2003-10-23 | 2003-10-23 | Anti-block standard impact tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320115566 CN2653472Y (en) | 2003-10-23 | 2003-10-23 | Anti-block standard impact tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2653472Y true CN2653472Y (en) | 2004-11-03 |
Family
ID=34345938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320115566 Expired - Fee Related CN2653472Y (en) | 2003-10-23 | 2003-10-23 | Anti-block standard impact tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2653472Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723976A (en) * | 2019-02-26 | 2019-05-07 | 中国神华能源股份有限公司 | Line clogging position detecting device |
-
2003
- 2003-10-23 CN CN 200320115566 patent/CN2653472Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723976A (en) * | 2019-02-26 | 2019-05-07 | 中国神华能源股份有限公司 | Line clogging position detecting device |
| CN109723976B (en) * | 2019-02-26 | 2021-10-08 | 中国神华能源股份有限公司 | Pipeline blockage position detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |