CN2569115Y - Standard bore sight - Google Patents
Standard bore sight Download PDFInfo
- Publication number
- CN2569115Y CN2569115Y CN 02254704 CN02254704U CN2569115Y CN 2569115 Y CN2569115 Y CN 2569115Y CN 02254704 CN02254704 CN 02254704 CN 02254704 U CN02254704 U CN 02254704U CN 2569115 Y CN2569115 Y CN 2569115Y
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- Prior art keywords
- leak
- needle
- utility
- model
- duct
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- Expired - Lifetime
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Abstract
The utility model relates to a standard leak which comprises a leak body, wherein a leak canal with a reducing orifice is arranged in the leak body; a valve needle is arranged in the leak canal, and the end part of the valve needle is matched with the reducing orifice; the rear face of the valve needle is tightly close to a fastening screw which can be fixed in the leak canal. In addition, an O-shaped sealing ring is sheathed on an outer wall on the front section of the fastening screw, and a through hole with thin diameter is formed in the center of a shaft of the fastening screw. Thus, the utility model has high pressure resistance and can be infinitely enlarged theoretically, and the reducing orifice in the leak body and the leak body form an integral structure without seal. The utility model has the characteristics of low cost, remote possibility of damage, long service life, simple processing technology, etc.
Description
Technical field
The utility model relates to a kind of admittance type referance leak, belong to a kind of standard metering device with constant leak rate.
Background technology
Small opening is a kind of device with constant leak rate, and it is the constant flow generator again, can be divided into two big classes usually, and the first kind is an admittance type small opening, and as the platinum filament small opening, metal flattens small opening, capillary leak and porous plug small opening; Second class is that film oozes helium type small opening, as the quartz thin film small opening.State Bureau of Technical Supervision has formulated the national metrological verification regulations of JJG793-92 referance leak specially for this reason.
The leak rate of small opening is meant under rated condition, and the gas flow of certain value is provided.Small opening can be used as the secondary standard of gas flow, is mainly used in the sensitivity and the error of indication of calibration leak locator.Admittance type referance leak mainly adopts the glass capillary manufacturing both at home and abroad at present.Fig. 1 is the referance leak structural representation made from prior art.Its leak rate is guaranteed that by special glass micro-aperture capillaceous sealing is by the O type circle sealing at glass fiber suction pipe two ends.The aperture of glass fiber suction pipe is minimum, and processing and manufacturing is difficulty very, and the processing and manufacturing qualification rate is extremely low, and cost is very high.The fixedly leak rate small opening of all size needs the glass fiber suction pipe of all size respectively, and the experiment work amount is also very big, and it is lower that the glass fiber suction pipe is withstand voltage, generally at 0.5Mpa---and below the 0.8Mpa, damage easily in manufacturing and the use, the life-span is short.Glass fiber suction pipe small opening manufacturing cost height, generally each needs 3000 yuan---and 4000 yuans, it is then more difficult to adopt other several method to make small opening.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of above-mentioned existence, and provide a kind of manufacture craft simple, cost is low, be easy to the referance leak of processing and manufacturing, it includes a hole body, offers the duct that has the reducing aperture in the hole body, is incorporated with needle in the duct, and the cephalic par of needle matches with the aperture, and the back of needle is adjacent the trip bolt that can be fixed in the duct.
The cephalic par of described needle is cone-shaped and stretches in the aperture that the trip bolt behind the needle is screwed in the duct by screw thread.
Be equipped with the O RunddichtringO on the leading portion outer wall of described trip bolt, and the axle center of trip bolt offers thin footpath through hole.
In fact the utility model has overcome technical prejudice, adopted the small opening of needle valve type structure, and the needle valve type structure is seen in variable valve usually, but variable valve is used for regulating the usefulness of leak rate size, leak rate changes, and the utility model is to make the fixedly small opening of leak rate, and leak rate is to keep extended immobilization constant after demarcation, and the fixedly leak rate of all size can be adjusted by the adjusting needle in calibration process and fix easily.It has the withstand voltage height of referance leak, and can reach infinity and hole body inner orifice and hole body in theory is one-piece construction, does not need sealing, and cost is low, and is not fragile, long service life, characteristics such as processing technology is simple.
Description of drawings
Fig. 1 is the prior art constructions synoptic diagram.
Fig. 2 is a structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in detail: the utility model mainly contains a tubulose hole body 1, offers the duct 6 that has reducing aperture 5 in it.Being incorporated with cephalic par in the duct 6 is the needle 2 of cone-shaped, and the cephalic par of its cone-shaped stretches in reducing aperture 5, forms an adjustable gap between the two.The rear portion of needle 2 is adjacent trip bolt 4, this trip bolt 4 is screwed in the duct 6 by screw thread, adjust gap between needle 2 and hole body 1 inner orifice by regulating the position of trip bolt 4 duct 6 in, thus adjustment and the fixedly demarcation of leak rate of realization all size.Trip bolt 4 fastening needles 2 to prevent the loosening of needle 2, make and demarcate leak rate and fix and keep remaining unchanged for a long period of time, and are equipped with O RunddichtringO 3 on the leading portion outer wall of trip bolt 4, and offer thin footpath through hole 7 at the axle center of trip bolt 4.
Claims (3)
1, a kind of referance leak, it includes a hole body, it is characterized in that offering in the hole body (1) duct (6) that has reducing aperture (5), be incorporated with needle (2) in the duct (6), and the cephalic par of needle (2) matches with aperture (5), and the back of needle (2) is adjacent the trip bolt (4) that can be fixed in the duct (6).
2, referance leak according to claim 1, the cephalic par that it is characterized in that described needle (2) are cone-shaped and stretch in aperture (5) that the trip bolt (4) behind the needle (2) is screwed in the duct (6) by screw thread.
3, referance leak according to claim 1 and 2 it is characterized in that being equipped with O RunddichtringO (3) on the leading portion outer wall of described trip bolt (4), and the axle center of trip bolt (4) offers thin footpath through hole (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02254704 CN2569115Y (en) | 2002-09-16 | 2002-09-16 | Standard bore sight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02254704 CN2569115Y (en) | 2002-09-16 | 2002-09-16 | Standard bore sight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2569115Y true CN2569115Y (en) | 2003-08-27 |
Family
ID=33723446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02254704 Expired - Lifetime CN2569115Y (en) | 2002-09-16 | 2002-09-16 | Standard bore sight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2569115Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738038A (en) * | 2016-01-29 | 2016-07-06 | 合肥工业大学 | Molecular flow standard leak hole and manufacturing method thereof |
| CN109115425A (en) * | 2018-09-26 | 2019-01-01 | 长春微控机械制造有限公司 | A kind of gas leakage marking apparatus |
| CN112378585A (en) * | 2020-11-13 | 2021-02-19 | 方博科技(深圳)有限公司 | Waterproof air tightness AL standard leak |
-
2002
- 2002-09-16 CN CN 02254704 patent/CN2569115Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738038A (en) * | 2016-01-29 | 2016-07-06 | 合肥工业大学 | Molecular flow standard leak hole and manufacturing method thereof |
| CN105738038B (en) * | 2016-01-29 | 2018-05-18 | 合肥工业大学 | A kind of molecular flow referance leak and preparation method thereof |
| CN109115425A (en) * | 2018-09-26 | 2019-01-01 | 长春微控机械制造有限公司 | A kind of gas leakage marking apparatus |
| CN112378585A (en) * | 2020-11-13 | 2021-02-19 | 方博科技(深圳)有限公司 | Waterproof air tightness AL standard leak |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG SANHUA HOLDINGS CO., LTD. Free format text: FORMER OWNER: SANHUA HOLDINGS GROUP CO., LTD. Effective date: 20100108 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: SANHUA HOLDINGS GROUP CO., LTD. Free format text: FORMER NAME: ZHEJIANG SANHUA GROUP CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Lower Liquan Road, Chengguan County, Zhejiang Province, Xinchang 312500, China Patentee after: SANHUA HOLDING GROUP Co.,Ltd. Address before: Lower Liquan Road, Chengguan County, Zhejiang Province, Xinchang 312500, China Patentee before: Zhejiang Sanhua Group Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100108 Address after: Lower Liquan Road, Chengguan Town, Xinchang County, Zhejiang Province, China: 312500 Patentee after: Zhejiang three flower Holdings Ltd. Address before: Lower Liquan Road, Chengguan County, Zhejiang Province, Xinchang 312500, China Patentee before: SANHUA HOLDING GROUP Co.,Ltd. |
|
| CU03 | Publication of corrected utility model |
Correction item: Name|Address|Co-patentee Correct: Zhejiang Sanhua Group Co., Ltd.|312500 Liquan Road, Zhejiang County in Xinchang Province town under False: Zhejiang three flower Holdings Limited|312500 Liquan Road, Zhejiang County in Xinchang Province town under Number: 05 Volume: 26 |
|
| ERR | Gazette correction |
Free format text: CORRECT: ; ; CO-PATENTEE; FROM: ZHEJIANG SANHUA HOLDING CO., LTD.:312500 XIALIQUAN ROAD, CHENGGUAN TOWN, XINCHANG COUNTY, ZHEJIANG PROVINCE TO: ZHEJIANG SANHUA GROUP CO., LTD.:312500 XIALIQUAN ROAD, CHENGGUAN TOWN, XINCHANG COUNTY, ZHEJIANG PROVINCE |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120916 Granted publication date: 20030827 |