CN214669146U - Foldable L-shaped pitot tube - Google Patents
Foldable L-shaped pitot tube Download PDFInfo
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- CN214669146U CN214669146U CN202120999576.9U CN202120999576U CN214669146U CN 214669146 U CN214669146 U CN 214669146U CN 202120999576 U CN202120999576 U CN 202120999576U CN 214669146 U CN214669146 U CN 214669146U
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- pitot tube
- connecting rod
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Abstract
The utility model discloses a foldable L-shaped pitot tube, which comprises a pitot tube head, a bracket tube type pitot tube body and a sliding type adjusting connecting rod; the pitot tube head comprises a concentric tube formed by concentrically sleeving two round tubes with different inner diameters, a static pressure tube is connected with the tail end of an outer tube of the concentric tube, and a total pressure tube is connected with the tail end of an inner tube of the concentric tube; the end of the leather support tube head is hinged with one end of the bracket tube type leather support tube body, one end of the sliding type adjusting connecting rod is hinged with the middle of the leather support tube head, and the other end of the leather support tube head is movably connected in a sliding groove at the other end of the bracket tube type leather support tube body. The utility model provides a pitot tube, when measuring hole tube socket installation overlength, pipe hole size are less, through slidingtype adjusting connecting rod, it is folding with pitot tube head and bracket tubular pitot tube shaft, make its protractile measuring hole tube socket under fold condition. When needs test, the connecting rod is adjusted to the accessible slidingtype, expandes the skin support tube head and bracket tubular skin support tube body and is 90 right angles, then carries out amount of wind, wind speed measurement.
Description
Technical Field
The utility model relates to a folding L type pitot tube is applicable to the technical field of the interior amount of wind of equipment pipelines such as induced draft, exhaust fume, wind speed test, is applicable to the less test condition of amount of wind measuring hole tube socket installation overlength, pipe hole aperture.
Background
A pitot tube is a tubular instrument that measures the difference between the total and static pressure of a fluid to calculate flow rate. The L-shaped pitot tube is also called a standard pitot tube, and the structure of the L-shaped pitot tube is a concentric tube formed by concentrically sleeving two round tubes with different inner diameters, the head of an inner tube is provided with a hole, and the side wall of an outer tube is provided with a hole. The concentric pipe is bent by 90 degrees at a position close to the head part, namely the end part pipe section and the straight pipe section are in an L shape, the tail end of the inner pipe is a total pressure pipe, and the tail end of the outer pipe is a static pressure pipe. Compared with other types of pitot tubes, the device is high in measurement accuracy and suitable for the conditions that the requirement on the test process is strict and the conclusion is required to be accurate. But facing to the complicated test environment in scene, the measuring hole tube socket of some pipelines is installed overlength, pipe hole aperture is less, and the measuring hole tube socket can't be fired the cutting and reform transform, leads to L type pitot tube can not get into the measuring hole and measure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a folding L type pitot tube, through adjusting rod mechanism, fold pitot tube head and pipe shaft, make its can stretch into behind the measuring orifice tube socket under fold condition, rethread adjusting rod mechanism expandes the pitot tube head and is 90 with the pipe shaft, then carries out the amount of wind, wind speed measurement it conveniently carries, is applicable to different test environment, and can maintain the high accuracy and measure.
The utility model discloses a following technical scheme realizes:
a foldable L-shaped pitot tube comprises a pitot tube head, a bracket tube type pitot tube body and a sliding type adjusting connecting rod;
the pitot tube head comprises a concentric tube formed by concentrically sleeving two round tubes with different inner diameters, a static pressure tube is connected with the tail end of an outer tube of the concentric tube, and a total pressure tube is connected with the tail end of an inner tube of the concentric tube;
the end of the leather support tube head is hinged with one end of the bracket tube type leather support tube body, one end of the sliding type adjusting connecting rod is hinged with the middle of the leather support tube head, and the other end of the leather support tube head is movably connected in a sliding groove at the other end of the bracket tube type leather support tube body.
The utility model has the further improvement that the inner diameter d of the inner pipe of the concentric pipe is 2-3 mm, the wall thickness is 1-2 mm, and the head is provided with a hole; outer tube external diameter D is (3 ~ 5) D, and wall thickness is 1 ~ 2mm, and the head shutoff is done arc r by interior and is 0.5D, and the outer tube is trompil at the lateral wall, and the trompil position is as follows:
a＝(3～4)D
in the formula: a is the distance between the position of the opening and the head of the skin support tube, and D is the outer diameter of the head of the skin support tube;
the relation between the total length L of the pitot tube head and the outer diameter D of the pitot tube head is as follows:
L＝(10～30)D。
the utility model discloses further improvement lies in, and the length of static pressure pipe and total pressure pipe is 10 ~ 50mm, external diameter 2 ~ 4 mm.
The utility model is further improved in that two sides of the lower part of the leather supporting tube head are provided with rivets A which are used for hinging with the bracket tube type leather supporting tube body; and a rivet B is arranged at one side of the middle part of the leather support tube head close to the lower side and is used for being hinged with the sliding type adjusting connecting rod.
The utility model discloses a further improvement lies in, the major structure of bracket tubular skin holds pipe shaft is square long tube, rectangular support otic placode is connected to the tip both sides of square long tube, two support otic placode one end and square long tube parallel and level, the other end exceeds bracket pipe top, it is porose to support otic placode upper portion, a rivet A for the installation of the lower part both sides of articulated skin holds pipe head, the afterbody pipe shaft side of square long tube, it has a style of calligraphy hole as the spout to open, the spout is established spacingly, one end orientation is for supporting the otic placode, for the spacing front end of spout, the other end is the spacing rear end of spout.
The utility model discloses a further improvement lies in, and the main part of slidingtype adjusting link is the connecting rod, and both ends are cyclic annular otic placode.
The utility model discloses further improvement lies in, the one end of connecting rod is the stiff end of slidingtype adjusting link, and the annular otic placode of the stiff end of slidingtype adjusting link is articulated with the middle part of leather-supported tube head by the rivet B that one side was equipped with down, and the other end is the free end of slidingtype adjusting link, through the annular otic placode of the free end of bolt with slidingtype adjusting link and the spout through connection of bracket tubular leather-supported tube body.
The utility model discloses a further improvement lies in, the free end of slidingtype adjusting link freely moves about in the spout for the angle control of skin support tube head is at 0 ~ 90 scope activity.
The utility model discloses at least, following profitable technological effect has:
the utility model provides a pair of folding L type pitot tube, when measuring hole tube socket installation overlength, pipe hole size are less, through slidingtype adjusting link, it is folding with pitot tube head and bracket tubular pitot tube shaft, make its protractile measuring hole tube socket under fold condition. When needs test, the connecting rod is adjusted to the accessible slidingtype, expandes the skin support tube head and bracket tubular skin support tube body and is 90 right angles, then carries out amount of wind, wind speed measurement.
Further, the utility model discloses can keep measuring high accuracy, convenient and other types's skin support pipe shaft composite set, nimble collocation simultaneously.
Further, the utility model discloses can stabilize the pitot tube head, the novel flexible angle of adjustment of pitot tube of being convenient for.
Further, the utility model discloses can adjust the angle between skin support tube head and the bracket tubular skin support tube body in a flexible way to make it stabilize at fixed angle motionless.
Drawings
Fig. 1 is a schematic structural view of the foldable L-shaped pitot tube in normal use.
Fig. 2 is a schematic structural view of a pitot tube head provided by the present invention.
Fig. 3 is a schematic structural view of the tubular type leather supporting tube body of the bracket of the present invention.
Fig. 4 is a schematic structural view of the foldable L-shaped pitot tube in a non-use state.
Description of reference numerals:
1 is a pitot tube head; 2, a bracket tube type skin support tube body; 3 is a sliding type adjusting connecting rod; 4 is a concentric tube; 5 is a static pressure tube; 6 is a full pressure pipe; 7 is rivet A; 8 is rivet B; 9 is a square long tube; 10 is a supporting ear plate; 11 is a hole; 12 is a chute; 13 is the limit front end of the chute; 14 is the limiting rear end of the chute; 15 is a connecting rod; 16 is the fixed end of the sliding adjusting connecting rod; and 17 is the free end of the sliding adjustment link.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, the utility model provides a foldable L-shaped pitot tube, the main body of which is a three-part structure comprising a pitot tube head 1, a bracket tube pitot tube body 2 and a sliding adjusting connecting rod 3.
As shown in figure 2, the pitot tube head 1 adopts a concentric tube 4 formed by concentrically sleeving two round tubes with different inner diameters, and the round tubes are made of stainless steel materials. The inner diameter d of the inner pipe is 2-3 mm, the wall thickness is 1-2 mm, and the head part is provided with a hole; outer tube external diameter D is (3 ~ 5) D, and wall thickness is 1 ~ 2mm, and the head shutoff is done arc r by interior and is 0.5D, and the outer tube is trompil at the lateral wall, and the trompil position is as follows:
a＝(3～4)D
in the formula: a is the distance between the position of the opening and the head of the skin support tube, and D is the outer diameter of the head of the skin support tube.
The relation between the total length L of the pitot tube head and the outer diameter D of the pitot tube head is as follows:
L＝(10～30)D
the tail part of the device extends out of two thin tubes, the length of the thin tubes is 10-50 mm, and the outer diameter of each thin tube is 2-4 mm. A thin tube is connected with the tail end of the outer tube and is a static pressure tube 5; the other thin tube is connected with the tail end of the inner tube and is a full-pressure tube 6. Two sides of the lower part of the leather holding tube head 1 are provided with rivets A7 which are used for being hinged with the bracket tube type leather holding tube body 2. A rivet B8 is arranged at one side of the middle part of the leather holding tube head 1 close to the lower side and is used for being hinged with the sliding type adjusting connecting rod 3. The utility model discloses can keep measuring high accuracy, convenient simultaneously with the skin support pipe shaft aggregate erection of other patterns, nimble collocation.
As shown in FIG. 3, the main body structure of the bracket tube type skin support tube body 2 is a square long tube 9 with a length of 800-1500 mm and through holes at two ends. The both sides of the end of the square long tube 9 are connected with rectangular supporting ear plates 10, one end of each of the two supporting ear plates is flush with the square long tube, the other end of each of the two supporting ear plates is higher than the top of the bracket tube, and the upper part of each of the supporting ear plates 10 is provided with a hole 11 for being hinged with rivets A7 arranged on both sides of the lower part of the pitot tube head 1. A straight-line-shaped hole is formed in the lateral side of the tail pipe body of the square long pipe 9 to serve as a sliding groove 12, the sliding groove is limited, one end of the sliding groove faces towards a supporting lug plate 10 and serves as a limiting front end 13 of the sliding groove, and the other end of the sliding groove serves as a limiting rear end 14 of the sliding groove. The utility model discloses can stabilize the pitot tube head, the novel flexible angle of adjustment of pitot tube of being convenient for.
As shown in fig. 4, the main body of the sliding adjusting link is a connecting rod 15, and both ends are annular ear plates equipped with bolts and nuts. One end of the connecting rod is a fixed end 16 of the sliding adjusting connecting rod, and an annular ear plate of the fixed end 16 of the sliding adjusting connecting rod is hinged with a rivet B8 arranged at the lower side of the middle part of the pitot tube head 1. The other end is a free end 17 of a sliding adjusting connecting rod, an annular lug plate of the free end 17 of the sliding adjusting connecting rod is connected with a sliding groove 12 of the bracket tube type leather support tube body in a penetrating way through a bolt, and the free end of the sliding adjusting connecting rod can move freely or be fastened immovably in the sliding groove through nut adjustment. The utility model discloses can adjust the angle between skin support tube head and the bracket tubular skin support tube body in a flexible way to make it stabilize at fixed angle motionless.
A folding L type pitot tube, after three kinds of components of pitot tube head, bracket tubular pitot tube body, slidingtype adjusting connecting rod are connected, loosen the nut, the free end 17 of slidingtype adjusting connecting rod can be in spout 12 free activity, can change pitot tube head angle. The angle of the sliding block is controlled to move within the range of 0-90 degrees by the limit arranged on the straight sliding chute 12. When the free end of the sliding adjusting connecting rod slides to the limiting front end of the sliding groove, the nut is fastened, the reformed leather support pipe head and the bracket pipe type leather support pipe body form 90 degrees, and then the leather support pipe head is in a normal use state. When the free end of the sliding adjusting connecting rod slides to the limiting rear end of the sliding groove, the nut is fastened, and the modified leather support tube head is parallel to the bracket tube type leather support tube body, so that the modified leather support tube head is in a non-use state.
Before the foldable L-shaped pitot tube is used, two thin silicone tubes are connected with a thin tube at the tail end of a pitot tube head, one thin silicone tube is connected with a full-pressure tube, the other thin silicone tube is connected with a static pressure tube, and the two thin silicone tubes penetrate through a bracket tube type pitot tube body. The other end of the fine silicon rubber tube is connected with a pressure gauge for measuring when the fine silicon rubber tube is in a normal use state.
Examples
The utility model provides a folded cascade's L type pitot tube, including pitot tube head 1, bracket tubular pitot tube shaft 2 and slidingtype adjusting link 3. After the three components of the leather support tube head 1, the bracket tube type leather support tube body 2 and the sliding type adjusting connecting rod 3 are connected, the nut is loosened, the free end of the sliding type adjusting connecting rod freely moves in the sliding groove 12, and the angle of the leather support tube head 1 can be changed. Before use, two thin silicone tubes are connected with a thin tube at the tail end of the leather support tube head 1, one thin silicone tube is connected with a total pressure tube, the other thin silicone tube is connected with a static pressure tube, and the two thin silicone tubes pass through the bracket tube type leather support tube body. The other end of the fine silicon rubber tube is connected with a pressure gauge for measuring when the fine silicon rubber tube is in a normal use state.
As shown in fig. 1, the free end of the sliding adjusting connecting rod slides to the limiting front end of the sliding groove, after the nut is fastened, the pitot tube head 1 and the bracket tube type pitot tube body 2 are 90 degrees, and then the pitot tube is in a normal use state.
As shown in fig. 4, the free end 17 of the sliding adjusting link slides to the limited rear end of the sliding groove 12, after the nut is fastened, the pitot tube head 1 is parallel to the bracket tube type pitot tube body 2, and the pitot tube is in a non-use state.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. A foldable L-shaped pitot tube is characterized by comprising a pitot tube head (1), a bracket tube type pitot tube body (2) and a sliding type adjusting connecting rod (3);
the pitot tube head (1) comprises a concentric tube (4) formed by concentrically sleeving two round tubes with different inner diameters, a static pressure tube (5) connected with the tail end of an outer tube of the concentric tube (4), and a total pressure tube (6) connected with the tail end of an inner tube of the concentric tube (4);
the tail end of the leather support tube head (1) is hinged with one end of the bracket tubular leather support tube body (2), one end of the sliding type adjusting connecting rod (3) is hinged with the middle of the leather support tube head (1), and the other end of the leather support tube head (1) is movably connected in a sliding groove at the other end of the bracket tubular leather support tube body (2).
2. The foldable L-shaped pitot tube according to claim 1, characterized in that the inner diameter d of the concentric tube (4) is 2-3 mm, the wall thickness is 1-2 mm, and the head is provided with an opening; outer tube external diameter D is (3 ~ 5) D, and wall thickness is 1 ~ 2mm, and the head shutoff is done arc r by interior and is 0.5D, and the outer tube is trompil at the lateral wall, and the trompil position is as follows:
a＝(3～4)D
in the formula: a is the distance between the position of the opening and the head of the skin support tube, and D is the outer diameter of the head of the skin support tube;
the relation between the total length L of the pitot tube head and the outer diameter D of the pitot tube head is as follows:
L＝(10～30)D。
3. a collapsible L-shaped pitot tube according to claim 2, characterized in that the length of the static pressure tube (5) and the total pressure tube (6) is 10-50 mm and the outer diameter is 2-4 mm.
4. The foldable L-shaped pitot tube as claimed in claim 2, wherein the pitot tube head (1) is provided with rivets A (7) at both sides of the lower part thereof for hinging with the bracket tube type pitot tube body (2); a rivet B (8) is arranged at one side of the middle part of the leather support tube head (1) close to the lower part and is used for being hinged with the sliding type adjusting connecting rod (3).
5. The foldable L-shaped pitot tube as claimed in claim 4, wherein the main structure of the bracket tube type pitot tube body (2) is a square long tube (9), two sides of the end of the square long tube (9) are connected with rectangular supporting ear plates (10), one end of each of the two supporting ear plates is flush with the square long tube, the other end of each of the two supporting ear plates is higher than the top of the bracket tube, the upper part of each supporting ear plate (10) is provided with a hole (11) for hinging rivets A (7) installed on two sides of the lower part of the pitot tube head (1), the side of the tail tube body of the square long tube (9) is provided with a straight hole as a sliding chute (12), the sliding chute is provided with a limit, one end of each supporting ear plate faces towards the supporting ear plate (10), the limit front end (13) of the sliding chute, and the other end of each supporting ear plate is the limit rear end (14) of the sliding chute.
6. A collapsible L-shaped pitot tube according to claim 5, characterized in that the body of the sliding adjusting link is a connecting rod (15) with two ends being ring-shaped ear plates.
7. The foldable L-shaped pitot tube as claimed in claim 6, wherein one end of the connecting rod (15) is a fixed end (16) of the sliding adjusting connecting rod, the annular ear plate of the fixed end (16) of the sliding adjusting connecting rod is hinged with a rivet B (8) arranged at the lower side of the middle part of the pitot tube head (1), the other end is a free end (17) of the sliding adjusting connecting rod, and the annular ear plate of the free end (17) of the sliding adjusting connecting rod is connected with the sliding chute (12) of the bracket tube pitot tube body in a penetrating way through a bolt.
8. A foldable L-shaped pitot tube according to claim 7, characterized in that the free end (17) of the sliding adjusting link is free to move in the chute (12) so that the angle of the pitot tube head (1) is controlled to move in the range of 0-90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120999576.9U CN214669146U (en) | 2021-05-11 | 2021-05-11 | Foldable L-shaped pitot tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120999576.9U CN214669146U (en) | 2021-05-11 | 2021-05-11 | Foldable L-shaped pitot tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214669146U true CN214669146U (en) | 2021-11-09 |
Family
ID=78488332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120999576.9U Active CN214669146U (en) | 2021-05-11 | 2021-05-11 | Foldable L-shaped pitot tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214669146U (en) |
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2021
- 2021-05-11 CN CN202120999576.9U patent/CN214669146U/en active Active
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