CN109100530B - Airspeed tube self-separating and falling protective sleeve - Google Patents
Airspeed tube self-separating and falling protective sleeve Download PDFInfo
- Publication number
- CN109100530B CN109100530B CN201810619032.8A CN201810619032A CN109100530B CN 109100530 B CN109100530 B CN 109100530B CN 201810619032 A CN201810619032 A CN 201810619032A CN 109100530 B CN109100530 B CN 109100530B
- Authority
- CN
- China
- Prior art keywords
- protective sleeve
- airspeed tube
- sleeve
- airspeed
- tube
- 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.)
- Active
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 41
- 239000004831 Hot glue Substances 0.000 claims abstract description 14
- 230000005484 gravity Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 230000001965 increasing effect Effects 0.000 description 3
- 239000010985 leather Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 241000226657 Clarkia concinna Species 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/02—Housings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Audible And Visible Signals (AREA)
Abstract
The invention discloses a airspeed tube self-separating and falling protective sleeve, and aims to provide a airspeed tube protective sleeve which is safe and reliable and can automatically fall off in the use process. The invention is realized by the following technical scheme: the protective sleeve barrel consists of a right semicircular sleeve and a left semicircular sleeve which are provided with hanging lugs, and hot melt adhesive filled between the two semicircular sleeves, wherein the two semicircular sleeves are bonded into a protective sleeve which completely covers the whole airspeed tube through the hot melt adhesive, when the airspeed tube is heated, the temperature rises, so that the hot melt adhesive is melted, and the adhesive force is lost, thereby separating and falling under the action of the gravity of the mass block and the protective sleeve. The invention solves the problems that the prior art is easy to forget to take down the airspeed tube protective sleeve, the airspeed tube cannot work in the air, and the airspeed tube protective sleeve is burnt out at high temperature when the airspeed tube is electrified on the ground to cause the blockage damage of the airspeed tube.
Description
Technical Field
The invention relates to a protective sleeve for an aircraft electric heating airspeed tube.
Background
The airspeed tube is an important device for acquiring total pressure and static pressure of the aircraft during flight and transmitting the total pressure and static pressure to airborne equipment such as an atmosphere data computer, an air pressure altimeter, an airspeed meter and the like to calculate atmospheric parameters such as indicated airspeed, air pressure altitude, lifting speed and the like. Because airspeed tube and static pressure Kong Jibing can distort the indication degree of some important driving instruments such as airspeed meter, barometer altimeter, angle of attack indicator, M number indicator, elevating speed meter, etc., even the automatic system can provide error information to make the pilot lose the basis of judging the flight state because of complete failure. Many flight accidents are due to pitot tube problems. Once the airspeed tube is blocked by a foreign object, malfunction of the airspeed indicator can occur, which can greatly mislead the pilot. It is not uncommon for aeronautical accidents to be caused by pitot tube blockage. In order to prevent insects and dust from blocking the airspeed tube pipeline when the aircraft is parked on the ground, a protective sleeve on the airspeed tube is required. However, when the ground of the airspeed tube is electrified and checked, the situation that the protective sleeve is forgotten to be taken down often occurs, so that the protective sleeve is burnt out and the airspeed tube is damaged. If the protective sleeve is forgotten to be taken off during the take-off of the aircraft, the function of the air airspeed tube is invalid, and misleading is caused to a pilot and an aircraft control system.
Currently, the mainstream airspeed tube of an aircraft is divided into three types of materials, namely wood, leather and cotton threads according to sleeve materials. Wooden pipe sleeve: most of the tubes are black, and are provided with red ribbons with the length of about 60cm, so that the ribbons are long, attractive and long in service life, and cannot be ablated, deformed or left with residues caused by accidental heating of the airspeed tube. The disadvantages are: the sleeve is kept on the airspeed tube by friction force, and the sleeve opening is enlarged due to abrasion when the airspeed tube is used for a long time, and the ribbon is longer, so that the ribbon is easy to fall off in windy weather. Secondly, the multi-tree wooden pipe sleeve is shorter and cannot cover the drain hole. Leather sheath: the leather tube is yellow, and is matched with a 20cm ribbon, and is fixed on a airspeed tube through a metal clamp. The advantages are that: the protection is complete, and the whole airspeed tube can be covered. The disadvantages are: the device is extremely easy to damage and has short service life; not resistant to high temperature, can ablate after being heated by the airspeed tube, and leave residues on the surface of the airspeed tube, which can block the drain hole; the clamp is easy to fail, so that the airspeed tube falls off, and the clamp is a metal object and can abrade the rear edge of the airspeed tube. Cotton thread airspeed tube sleeve: mostly red, 20cm ribbon is matched and fixed on a airspeed tube by friction force. The advantages are that: the pipe sleeve is high-temperature resistant, long in service life, non-deformable and capable of covering the drain hole. The disadvantages are: the material absorbs water and is easy to stick with sand. The airspeed head protective sleeve is manually taken down before the aircraft flies or before the ground power-on test. Once forgotten to remove, the pitot tube may be damaged or even the flight safety may be compromised.
The protective sleeve used for the airspeed tube disclosed in the prior art has no function of automatically falling off.
Disclosure of Invention
The invention aims to solve the problems and the defects of the prior airspeed head protective sleeve, and provides a airspeed head protective sleeve which is safe and reliable and can automatically fall off in the use process.
In order to achieve the above purpose, the invention provides a self-detaching protective sleeve for a airspeed tube in the use process, which comprises the following components: a protective sheath barrel of space velocity tube is put in, its characterized in that: the protective sleeve barrel consists of a right round sleeve 1 and a left round sleeve 3 which are provided with hanging lugs, and hot melt adhesive 5 filled between the two semi-round sleeves, wherein the two semi-round sleeves are bonded into a protective sleeve which completely covers the whole airspeed tube through the hot melt adhesive 5, when the airspeed tube is heated, the temperature is increased, so that the hot melt adhesive 5 is melted and loses bonding force, and therefore, the right mass block 2, the left mass block 4 and the protective sleeve are separated and fall off under the action of gravity.
Compared with the prior art, the invention has the following beneficial effects.
Is safe and reliable. The invention adopts a semicircular sleeve 1 of a bonding mass block 2 and a semicircular sleeve 3 of a bonding mass block 4, and the two semicircular sleeves are bonded into a complete airspeed tube protective sleeve through the hot melt adhesive 3, so that the airspeed tube protective sleeve is used for protecting the airspeed tube, when the airspeed tube is heated, the temperature is increased, so that the hot melt adhesive is melted, the bonding force is lost, and the airspeed tube is separated and falls off under the action of the gravity of the mass block and the protective sleeve. Therefore, the problems that the prior art is easy to forget to take down the airspeed tube protective sleeve, the airspeed tube cannot work in the air, and the airspeed tube is blocked due to the fact that the airspeed tube protective sleeve is burnt out at high temperature when the airspeed tube is electrified on the ground are solved.
Drawings
FIG. 1 is a schematic isometric view of a protective sheath of a disengageable pitot tube of the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a cross-sectional view taken along A-A of fig. 2.
In the figure: 1 right semicircle sleeve, 2 right mass block, 3 left semicircle sleeve, 4 left mass block and 5 hot melt adhesive.
Detailed Description
See fig. 1-3. In the embodiments described below, a protective sheath for self-detaching a pitot tube during use, comprising: the protective sleeve barrel is sleeved with the airspeed tube, the protective sleeve barrel of the airspeed tube consists of a right semicircular sleeve 1 and a left semicircular sleeve 3 which are provided with hanging lugs, and hot melt adhesive 5 filled between the two semicircular sleeves, the two semicircular sleeves are adhered into a protective sleeve which completely covers the whole airspeed tube through the hot melt adhesive 5, when the airspeed tube is heated, the temperature rises to enable the hot melt adhesive 5 to melt, the adhesive force is lost, and the right mass block 2, the left mass block 4 and the protective sleeve are separated and fall off under the action of heat by virtue of the gravity of the protective sleeve. Wherein, right quality piece 2 links firmly on right round body sleeve 1, and left quality piece 4 links firmly on left round body sleeve 3. The right mass block 2 and the left mass block 4 have the function of increasing the weight of the semicircular sleeves so that the left semicircular sleeve and the right semicircular sleeve are easy to separate.
Claims (1)
1. A pitot tube self-separating and shedding protective sleeve, comprising: a protective sheath barrel of space velocity tube is put in, its characterized in that: the protective sleeve body consists of a right semicircular sleeve (1) and a left semicircular sleeve (3) which are provided with hanging lugs, and hot melt adhesive (5) filled between the two semicircular sleeves;
the right mass block (2) is fixedly connected to the right semicircular sleeve (1), and the left mass block (4) is fixedly connected to the left semicircular sleeve (3);
the two semicircular sleeves are bonded into a protective sleeve which completely covers the whole airspeed tube through hot melt adhesive (5);
the right mass block (2), the left mass block (4) and the protective sleeve are separated and fall off under the action of heat by the gravity of the protective sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810619032.8A CN109100530B (en) | 2018-06-09 | 2018-06-09 | Airspeed tube self-separating and falling protective sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810619032.8A CN109100530B (en) | 2018-06-09 | 2018-06-09 | Airspeed tube self-separating and falling protective sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109100530A CN109100530A (en) | 2018-12-28 |
| CN109100530B true CN109100530B (en) | 2024-02-20 |
Family
ID=64796853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810619032.8A Active CN109100530B (en) | 2018-06-09 | 2018-06-09 | Airspeed tube self-separating and falling protective sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109100530B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110435906B (en) * | 2019-08-30 | 2024-02-02 | 山东太古飞机工程有限公司 | Self-separating protective sleeve for airspeed tube of civil aircraft |
| CN114060650B (en) * | 2021-11-09 | 2023-06-09 | 日木智能控制技术股份有限公司 | Towed sampling heat tracing composite pipeline and manufacturing method thereof |
| CN113866451B (en) * | 2021-12-06 | 2022-02-18 | 大同航源众诚动力科技有限公司 | Civil aircraft airspeed head self-separation protective sleeve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2221702Y (en) * | 1995-05-11 | 1996-03-06 | 张学 | Chucking thermal shrinkage casing |
| CN102510032A (en) * | 2011-11-05 | 2012-06-20 | 天津鹏翎胶管股份有限公司 | Straight rubber hose with hot melt adhesive sheath and preparation method for straight rubber hose |
| CN107238366A (en) * | 2017-05-26 | 2017-10-10 | 成都凯天电子股份有限公司 | Weather vane type angle of attack airspeed sensor protection device |
| CN207099354U (en) * | 2017-08-23 | 2018-03-13 | 弗兰科希管件系统（上海）有限公司 | One kind heating pipe structure and electric heater |
| CN208520891U (en) * | 2018-06-09 | 2019-02-19 | 成都凯天电子股份有限公司 | The pitot protective case to fall off can be automatically separated |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2864228B1 (en) * | 2003-12-19 | 2006-04-28 | Airbus France | DEVICE FOR PROTECTING A SOLIDARITY PROBE OF AN ETERNAL WALL OF AN AIRCRAFT |
-
2018
- 2018-06-09 CN CN201810619032.8A patent/CN109100530B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2221702Y (en) * | 1995-05-11 | 1996-03-06 | 张学 | Chucking thermal shrinkage casing |
| CN102510032A (en) * | 2011-11-05 | 2012-06-20 | 天津鹏翎胶管股份有限公司 | Straight rubber hose with hot melt adhesive sheath and preparation method for straight rubber hose |
| CN107238366A (en) * | 2017-05-26 | 2017-10-10 | 成都凯天电子股份有限公司 | Weather vane type angle of attack airspeed sensor protection device |
| CN207099354U (en) * | 2017-08-23 | 2018-03-13 | 弗兰科希管件系统（上海）有限公司 | One kind heating pipe structure and electric heater |
| CN208520891U (en) * | 2018-06-09 | 2019-02-19 | 成都凯天电子股份有限公司 | The pitot protective case to fall off can be automatically separated |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109100530A (en) | 2018-12-28 |
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