CN203688022U - Clamp for L-shaped pitot tube flow measurement - Google Patents
Clamp for L-shaped pitot tube flow measurement Download PDFInfo
- Publication number
- CN203688022U CN203688022U CN201320808093.1U CN201320808093U CN203688022U CN 203688022 U CN203688022 U CN 203688022U CN 201320808093 U CN201320808093 U CN 201320808093U CN 203688022 U CN203688022 U CN 203688022U
- Authority
- CN
- China
- Prior art keywords
- chuck
- pitot tube
- gland
- clamp clip
- rubber sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005259 measurement Methods 0.000 title abstract description 8
- 210000004907 gland Anatomy 0.000 claims abstract description 37
- 238000003466 welding Methods 0.000 claims description 24
- 238000012360 testing method Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model discloses a clamp for L-shaped pitot tube flow measurement. The L-shaped clamp comprises a weld block, a gland, a jacket, a clamping piece and two puller bolts, wherein the jacket is screwed in the weld block; the clamping piece is mounted in the jacket; L-shaped pitot tubes penetrate through the clamping piece; the L-shaped pitot tubes at two ends of the clamping piece are sleeved with two annular rubber gaskets; an annular metal gasket is arranged on each of the two sides of an integrity formed by the two rubber gaskets in the long external thread section of the jacket; the rubber gaskets and the metal gaskets are arranged in an external cylinder of the jacket and outside an internal cylinder of the jacket; the external diameters of the metal gaskets and the rubber gaskets are equal to the internal diameter of the external cylinder of the jacket; the L-shaped pitot tubes are sleeved with the gland, and the gland is in screw joint with the short thread section of the jacket; the two puller bolts are mounted in the two internal threaded holes of the jacket respectively. The clamp facilitates accurate positioning and movable operation, and ensures no leakage of a gas during the measurement process.
Description
The utility model belongs to experimental technique field, is specifically related to a kind of L-type pitot tube measuring flow fixture.
Background technology
L-type pitot tube is the instrument of gas flow in measuring channel.Conventionally bore a through hole in measuring channel outside wall surface, to pitot tube is inserted in the air-flow in pipeline cross section, conversion insertion depth is measured the flow of this each position, cross section, then calculates average discharge.When the interior gas flow of measuring channel, pitot tube is positioned on pipeline with the clamp clip of fixture, pitot tube mobile insertion depth that converts in fixture is measured.At present, common L-type pitot tube measuring flow is as follows with fixture and measuring method: 1) bore a through hole in measuring channel outside wall surface, weld the welding block that a dimension of inner screw thread is M30 × 2 in this through hole; 2) gland that an external thread is of a size of to M30 × 2 is screwed in welding block; 3) L-type pitot tube is through the endoporus of gland, and in gland, the degree of depth of running transform insertion pipeline is carried out measuring flow.
Because L-type pitot tube has 90 ° of bent portions, the endoporus of gland will allow the bent portion of pitot tube pass, must consider that the axial length of gland and the bending size of bent portion determine the internal diameter in hole, at least than pitot tube outer tube wall diameter large 3 to 4 millimeters of general gland internal diameters, just can make the bent portion of pitot tube pass.This has gas leakage while just having caused measuring flow, conventionally cover air-leak section with cotton or cotton yarn, but still have gas leakage.In addition, pitot tube can not be located in gland endoporus, and when measurement, staff need to grasp pitot tube location, in fact, is difficult to hold pitot tube with hand, therefore can not accurately make pitot tube location.
To sum up, at present L-type pitot tube measuring flow easily leaks gas with fixture, and will grasp pitot tube while measuring, and pitot tube is difficult to location, directly affects the accuracy of measuring flow.Therefore, study and a kind ofly easily make pitot tube location and be necessary without the pitot tube measuring flow fixture of gas leakage.
Summary of the invention
The defect or the deficiency that exist for above-mentioned prior art, the purpose of this utility model is, a kind of L-type pitot tube measuring flow fixture is provided, this utensil volume is little, lightweight, be convenient for carrying, in the time adopting in L-type pitot tube measuring channel gas flow, be convenient to accurately location and move operation, can make the pipeline inner conversion insertion depth measuring flow of pitot tube in various sectional dimensions, and in measurement, guarantee that gas does not leak.This fixture is applicable to the L-type pitot tube of various different sizes.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of L-type pitot tube measuring flow fixture, comprises welding block and gland, also comprises chuck, clamp clip and two puller bolts; Wherein, described welding block is the cylinder with female both ends open, and welding block is vertically welded on the outer wall of measuring channel; Chuck is one with externally threaded double-layered cylinder, and its outer cylinder and inner layer cylinder are connected, and the length at the two ends of outer cylinder is all greater than inner layer cylinder; Chuck sidewall is provided with two internal thread through hole, and these two internal thread through hole coaxially arrange, they by chuck from being axially divided into long external thread section and short external thread section two parts that length is different; Gland is for being with female circular lid, and its internal thread coordinates with the external thread of the short thread segments of chuck; The end face center of gland is provided with a through hole, and this through hole equals the external diameter of the stock portion of L-type pitot tube; The long external thread section of chuck is screwed onto in welding block, and clamp clip is arranged in chuck, and L-type pitot tube passes from clamp clip, and now between the corresponding edge of two circular arc cylinders of clamp clip, has certain distance; On the L-type pitot tube at clamp clip two ends, all overlap the rubber sheet gasket that has two ring-types, and between two rubber sheet gaskets in the long external thread section of chuck and measuring channel, be provided with the metallic gasket of an annular, between two rubber sheet gaskets in the short external thread section of chuck and gland inwall, be also provided with the metallic gasket of an annular; Rubber sheet gasket and metallic gasket are all positioned at the outer cylinder of chuck and are positioned at outside inner layer cylinder; The external diameter of metallic gasket and rubber sheet gasket is equal to the internal diameter of the outer cylinder of chuck; Rubber sheet gasket in the long external thread section of chuck and metallic gasket are pressed between the sidewall of inner layer cylinder and the outer wall of pipe under test of chuck, and the rubber sheet gasket in the short external thread section of chuck is pressed between the sidewall of inner layer cylinder and the inner face of gland of chuck; Gland is enclosed within on L-type pitot tube and is screwed onto the short thread segments of chuck; In two internal thread holes on chuck, a puller bolt is installed respectively, two puller bolts are for withstanding respectively diametrically a semicircular cylinder of the clamp clip in chuck.
The utility model also comprises following other technologies feature:
Described clamp clip by two independently circular arc cylinder make-up form, the external diameter of clamp clip is less than the inner layer cylinder that the internal diameter of chuck and its length are less than chuck, its internal diameter equals the external diameter of the stock portion of L-type pitot tube;
The external diameter of described clamp clip is 17 millimeters, and internal diameter equals the stock portion external diameter of pitot tube, and the distance between the corresponding edge of two semicircular cylinders of clamp clip is 1.5 millimeters.
The external thread size of described welding block, chuck and the dimension of inner screw thread of gland are M27 × 2.
The endoporus of described chuck is of a size of 19 millimeters.
The internal diameter size of described rubber sheet gasket is less 0.5 millimeter than the stock portion outside dimension of the pitot tube that adopts.
Advantage of the present utility model:
Fixture volume is little, lightweight, be convenient for carrying, in the time adopting in L-type pitot tube measuring channel gas flow, be convenient to accurately location and move operation, can make the pipeline inner conversion insertion depth measuring flow of pitot tube in various sectional dimensions, and in measurement, guarantee that gas does not leak.This fixture is repeatedly applied to the L-type pitot tube measuring flow of plurality of specifications, and effect is fine.
Accompanying drawing explanation
Fig. 1 is the structural representation of L-type pitot tube measuring flow of the present utility model fixture.
Fig. 2 be pack into screw plug schematic diagram.
Label in figure represents respectively: 1-welding block, 2-chuck, 3-clamp clip, 4-gland, 5-puller bolt, 6-metallic gasket, 7-rubber sheet gasket, 8-screw plug, 9-L shape pitot tube, 10-pipe under test.
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
Embodiment
As shown in Figure 1, L-type pitot tube measuring flow fixture of the present utility model, comprises welding block 1, chuck 2, clamp clip 3, gland 4 and two puller bolts 5.Wherein, welding block 1 is the cylinder with female both ends open, and welding block 1 is vertically welded on the outer wall of measuring channel 10; Chuck 2 is one with externally threaded double-layered cylinder, and its outer cylinder and inner layer cylinder are connected, and the length at the two ends of outer cylinder is all greater than inner layer cylinder; Chuck 2 sidewalls are provided with two internal thread through hole, and these two internal thread through hole coaxially arrange, they by chuck 2 from being axially divided into long external thread section and short external thread section two parts that length is different; Clamp clip 3 by two independently circular arc cylinder form, the external diameter of clamp clip 3 is less than the inner layer cylinder that the internal diameter of chuck 2 and its length are less than chuck 2, its internal diameter equals the external diameter of the stock portion of L-type pitot tube 9; Gland 4 is for being with female circular lid, and its internal thread coordinates with the external thread of the short thread segments of chuck 2; The end face center of gland 4 is provided with a through hole, and this through hole equals the external diameter of the stock portion of L-type pitot tube 9; The long external thread section of chuck 2 is screwed onto in welding block 1, and clamp clip 3 is arranged in chuck 2, and L-type pitot tube 9 passes from clamp clip 3, and now between the corresponding edge of two circular arc cylinders of clamp clip 3, has certain distance; On the L-type pitot tube 9 at clamp clip 3 two ends, all overlap the rubber sheet gasket 7 that has two ring-types, and between two rubber sheet gaskets 6 in the long external thread section of chuck 2 and measuring channel, be provided with the metallic gasket 6 of an annular, between two rubber sheet gaskets 6 in the short external thread section of chuck 2 and gland 4 inwalls, be also provided with the metallic gasket 6 of an annular; Rubber sheet gasket 7 and metallic gasket 6 are all positioned at the outer cylinder of chuck 2 and are positioned at outside inner layer cylinder; The external diameter of metallic gasket 6 and rubber sheet gasket 7 is equal to the internal diameter of the outer cylinder of chuck 2; Rubber sheet gasket 7 in the long external thread section of chuck 2 and metallic gasket 6 are pressed between the sidewall of inner layer cylinder and the outer wall of pipe under test 10 of chuck 2, and the rubber sheet gasket 7 in the short external thread section of chuck 2 is pressed between the sidewall of inner layer cylinder and the inner face of gland 4 of chuck 2; Gland 4 is enclosed within on L-type pitot tube 9 and is screwed onto the short thread segments of chuck 2; Gland 4 is for being pressed on the metallic gasket 6 in the long internal thread segment of chuck 2, rubber sheet gasket 7 and clamp clip 3 outside wall surface of pipe under test 10; 5, two bolts 5 of a bolt are installed respectively for withstanding respectively diametrically a semicircular cylinder of the clamp clip 3 in chuck 2 in two internal thread holes on chuck 2.
The dimension of inner screw thread of welding block 1 is M27 × 2, measure-alike with the ordinary hot resistance external thread of measuring temperature, as required, can also be equipped with a thermal resistance and be screwed into welding block 1 to measure the gas temperature at this pipeline section place.
The external thread size of chuck 2 and the dimension of inner screw thread of gland 4 are M27 × 2.The endoporus of chuck 2 is of a size of 19 millimeters.
According to the pitot tube 9 stock portion outside dimensions of different size, each specification is made a clamp clip 3(and is made up of two semicircular cylinders).The external diameter of clamp clip is 17 millimeters, and internal diameter equals pitot tube stock portion external diameter, and the distance between the corresponding edge of two semicircular cylinders of clamp clip is 1.5 millimeters, is convenient to clamp pitot tube 10.It is red copper that clamp clip 3 adopts material, belongs to softer metals.Not only easily clamp pitot tube, and pitot tube moves in clamp clip, do not scratch pitot tube.Pitot tube 9 materials are stainless steel.
The external thread of puller bolt 5 is of a size of M5.
According to different size pitot tube stock portion outside dimension, each specification is made four rubber sheet gaskets 7.The internal diameter size of rubber sheet gasket 7 than the pitot tube stock portion outside dimension that adopts little 0.5 millimeter.Rubber sheet gasket 7 adopts the flexible glue skin elastomeric material that easily penetrates pitot tube and good sealing effect.
While utilizing the utility model to carry out flow measurement to pipe under test 10, install and measure as follows:
1) boring internal diameter in measuring channel 10 outside wall surface is the through hole of 19 millimeters, by the center of welding block 1 and through hole and be vertically welded on measuring channel 10 outer walls.
2) selected L-type pitot tube 9, by gland 4 aperture sizes be the circular hole of 13 millimeters through the bent portion of pitot tube 9, be positioned at the arbitrary position of stock portion after the bend pipe of pitot tube 9.
3) according to selected two rubber sheet gaskets 7 of selected pitot tube 9 specifications, first the bent portion through pitot tube 9 by two selected rubber sheet gaskets 7, packs in the internal thread of gland 4,
4) the short external thread position of chuck 2 is screwed in the internal thread of gland 4 through pitot tube 9, withstands rubber sheet gasket 7, then screw up with a wrench.
5) according to the selected clamp clip 3 of the specification of selected pitot tube 9.The endoporus that the stock portion that selected clamp clip 3 is being pasted to pitot tube 9 packs chuck 2 into, withstands the rubber sheet gasket 7 in gland 4.
6) two puller bolts 5 are screwed into respectively in the internal thread that two of chuck 2 are of a size of M5, first do not tighten.
7) the first bent portion through pitot tube 9 by a metallic gasket 6, the long external thread position of pasting chuck 2.Then the bent portion that two selected rubber sheet gaskets 7 is also passed to pitot tube 9, is pasting this metallic gasket 6.The bent portion through pitot tube 9 by a metallic gasket 6, is pasting two rubber sheet gaskets 7 again.
8) hand-held pitot tube 9 and connected chuck 2, the internal thread by the bent portion of pitot tube 9 through welding block 1, and the long external thread position of chuck 2 is screwed up with a wrench in the internal thread of welding block 1, the long external thread of chuck 2 is of a size of M27 × 2.
9) controlling pitot tube 9 in the method for the pipeline inner conversion degree of depth is: manually unclamp two puller bolts 5 that withstand clamp clip 3, holding pitot tube 9 makes it in clamp clip 3, move to the needed degree of depth, then manually tighten two puller bolts 5, pitot tube 9 is located, can carry out flow measurement.
10) if want the interior gas temperature of measuring channel 10.Dismantle pitot tube 9 and connected chuck 2, be directly screwed into thermal resistance in welding block 1, can carry out temperature survey.
11) after measuring flow finishes, dismantle after the chuck 2, clamp clip 3, gland 4 of pitot tube 9 and this fixture, two puller bolts 5, two metallic gaskets 6 and four rubber sheet gaskets 7, the screw plug 8 being equipped with is in advance screwed into the internal thread of welding block 1, to prevent the interior Leakage Gas of measuring channel 10.
Claims (6)
1. a L-type pitot tube measuring flow fixture, comprises welding block (1) and gland (4), it is characterized in that, also comprises chuck (2), clamp clip (3) and two puller bolts (5); Wherein, described welding block (1) is the cylinder with female both ends open, and welding block (1) is vertically welded on the outer wall of measuring channel (10); Chuck (2) is one with externally threaded double-layered cylinder, and its outer cylinder and inner layer cylinder are connected, and the length at the two ends of outer cylinder is all greater than inner layer cylinder; Chuck (2) sidewall is provided with two internal thread through hole, and these two internal thread through hole coaxially arrange, they by chuck (2) from being axially divided into long external thread section and short external thread section two parts that length is different; Gland (4) is for being with female circular lid, and its internal thread coordinates with the external thread of the short thread segments of chuck (2); The end face center of gland (4) is provided with a through hole, and this through hole equals the external diameter of the stock portion of L-type pitot tube (9); The long external thread section of chuck (2) is screwed onto in welding block (1), clamp clip (3) is arranged in chuck (2), L-type pitot tube (9) passes from clamp clip (3), and now between the corresponding edge of two circular arc cylinders of clamp clip (3), has certain distance; On the L-type pitot tube (9) at clamp clip (3) two ends, all overlap the rubber sheet gasket (7) that has two ring-types, and between two rubber sheet gaskets (6) in the long external thread section of chuck (2) and measuring channel, be provided with the metallic gasket (6) of an annular, between two rubber sheet gaskets (6) in the short external thread section of chuck (2) and gland (4) inwall, be also provided with the metallic gasket (6) of an annular; Rubber sheet gasket (7) and metallic gasket (6) are all positioned at the outer cylinder of chuck (2) and are positioned at outside inner layer cylinder; The external diameter of metallic gasket (6) and rubber sheet gasket (7) is equal to the internal diameter of the outer cylinder of chuck (2); The rubber sheet gasket (7) and the metallic gasket (6) that are positioned at the long external thread section of chuck (2) are pressed between the sidewall of inner layer cylinder and the outer wall of pipe under test (10) of chuck (2), and the rubber sheet gasket (7) that is positioned at the short external thread section of chuck (2) is pressed between the sidewall of inner layer cylinder and the inner face of gland (4) of chuck (2); Gland (4) is enclosed within L-type pitot tube (9) goes up and is screwed onto the short thread segments of chuck (2); In two internal thread holes on chuck (2), a puller bolt (5) is installed respectively.
2. L-type pitot tube measuring flow fixture as claimed in claim 1, it is characterized in that, described clamp clip (3) by two independently circular arc cylinder form, the external diameter of clamp clip (3) is less than the inner layer cylinder that the internal diameter of chuck (2) and its length are less than chuck (2), and its internal diameter equals the external diameter of the stock portion of L-type pitot tube (9).
3. L-type pitot tube measuring flow fixture as claimed in claim 2, it is characterized in that, the external diameter of described clamp clip (3) is 17 millimeters, and internal diameter equals the stock portion external diameter of pitot tube (9), and the distance between the corresponding edge of two semicircular cylinders of clamp clip (3) is 1.5 millimeters.
4. L-type pitot tube measuring flow fixture as claimed in claim 1, is characterized in that, the external thread size of described welding block (1), chuck (2) and the dimension of inner screw thread of gland (4) are M27 × 2.
5. L-type pitot tube measuring flow fixture as claimed in claim 1, is characterized in that, the internal diameter of described chuck (2) is 19 millimeters.
6. L-type pitot tube measuring flow fixture as claimed in claim 1, is characterized in that, the internal diameter size of described rubber sheet gasket (7) than the stock portion outside dimension of the pitot tube that adopts (9) little 0.5 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320808093.1U CN203688022U (en) | 2013-12-10 | 2013-12-10 | Clamp for L-shaped pitot tube flow measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320808093.1U CN203688022U (en) | 2013-12-10 | 2013-12-10 | Clamp for L-shaped pitot tube flow measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203688022U true CN203688022U (en) | 2014-07-02 |
Family
ID=51009909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320808093.1U Expired - Lifetime CN203688022U (en) | 2013-12-10 | 2013-12-10 | Clamp for L-shaped pitot tube flow measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203688022U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467154A (en) * | 2015-12-29 | 2016-04-06 | 浙江大学 | Pin type Pitot tube with fixing device and flow velocity measurement method thereof |
| CN106996803A (en) * | 2016-01-25 | 2017-08-01 | 常州兰翔机械有限责任公司 | A kind of adjustable length clamp of sensor and its method of work |
-
2013
- 2013-12-10 CN CN201320808093.1U patent/CN203688022U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467154A (en) * | 2015-12-29 | 2016-04-06 | 浙江大学 | Pin type Pitot tube with fixing device and flow velocity measurement method thereof |
| CN106996803A (en) * | 2016-01-25 | 2017-08-01 | 常州兰翔机械有限责任公司 | A kind of adjustable length clamp of sensor and its method of work |
| CN106996803B (en) * | 2016-01-25 | 2019-03-19 | 中国航发常州兰翔机械有限责任公司 | A kind of length tunable sensors fixture and its working method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203688022U (en) | Clamp for L-shaped pitot tube flow measurement | |
| CN201628615U (en) | Quick interface unit used for pressure test | |
| CN203422188U (en) | Gas pressure detection assembly | |
| CN216869924U (en) | Titanium tube heat exchanger gas tightness detection device | |
| CN205228665U (en) | Thermocouple fixing device | |
| CN206258164U (en) | Dipstick with liquid level gauge | |
| CN203572401U (en) | Hose inner diameter measuring tool | |
| CN202229895U (en) | Leakage detection tool for pressure device | |
| CN209539428U (en) | A kind of single tube vehicle exhaust switching tooling | |
| CN204286624U (en) | A kind of horizontal case formula condenser wall multipoint temperature measuring device | |
| CN204924345U (en) | Gas table is got and is pressed pipe assembly | |
| CN203336133U (en) | Rapid plugging device | |
| CN105215892A (en) | Radiator dry inspection fixture | |
| CN201706133U (en) | Pressurized leakage-plugging tool for temperature measurement connection point | |
| CN204758345U (en) | Blast furnace gas detects pipeline sample pipe | |
| CN218523424U (en) | External leakage quantity measuring device for pressure resistance of petroleum pipe coupling at high temperature | |
| CN204314025U (en) | A kind of frock for testing product sealing | |
| CN110899912A (en) | Argon filling method for argon arc welding butt joint of pipelines | |
| CN214667162U (en) | Quick positioning and clamping device suitable for different pressure flowmeters | |
| CN218584290U (en) | Portable leak detector | |
| CN216483788U (en) | Welding seam detector for double-pipe heat exchanger | |
| CN204064575U (en) | A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly | |
| CN220930529U (en) | Magnetic probe is anchor clamps base for anchor clamps | |
| CN204085803U (en) | The bubble-tight device of a kind of testing pipes welding junction | |
| CN114323498B (en) | Airtight air pressure test device of fin heat exchange tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: XI'AN SHAANGU VENTILATION EQUIPMENT Co.,Ltd. Assignor: XI'AN SHAANGU POWER Co.,Ltd. Contract record no.: 2015610000033 Denomination of utility model: Clamp for L-shaped pitot tube flow measurement Granted publication date: 20140702 License type: Exclusive License Record date: 20150428 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |
|
| CX01 | Expiry of patent term |