CN214308924U - L-shaped standard pitot tube testing device - Google Patents
L-shaped standard pitot tube testing device Download PDFInfo
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- CN214308924U CN214308924U CN202120497829.2U CN202120497829U CN214308924U CN 214308924 U CN214308924 U CN 214308924U CN 202120497829 U CN202120497829 U CN 202120497829U CN 214308924 U CN214308924 U CN 214308924U
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Abstract
The utility model provides a L type standard pitot tube testing arrangement, it can be out of shape for L type or a style of calligraphy according to the demand initiative to the completion is to the wind channel test of long and thin hole seat. The test gun comprises a test gun rod and a test gun head, wherein a pivot point is arranged at the lower end of one side of the test gun rod, which faces the test gun head, a fan-shaped worm gear is fixedly arranged at the rotating output end of the pivot point, the fan-shaped worm gear is fixedly connected with the body part of the test gun head through a connecting piece, the rear end part of a pressure transmission pipe is arranged in the inner cavity of the test gun rod, the front end of the pressure transmission pipe comprises a flexible bending part and a fixed part which goes deep into the test gun head, a transmission shaft which is axially and linearly arranged is also arranged in the inner cavity of the test gun rod, the rear end of the transmission shaft protrudes out of the test gun rod and is fixedly provided with an adjusting knob, a worm is fixedly arranged at the front end of the transmission shaft, and the worm is meshed with the corresponding worm gear of the fan-shaped worm gear.
Description
Technical Field
The utility model relates to an amount of wind measuring technical field specifically is a L type standard pitot tube testing arrangement.
Background
In industrial processes, it is often necessary to test the flow rate of the media. Because of simple structure, convenient use and low price, the prior pitot tube is a flow velocity measuring device with the widest application. According to the structural form, the Pitot tube is mainly divided into an L type (standard type) and an S type. The S-shaped pitot tube is widely applied to flow velocity measurement of a flue dust-containing system, but due to the structure of the pressure tapping hole gun head, a vortex is easily formed near a pressure tapping hole, and measurement is affected. The L-shaped pitot tube is the most perfect and stable pitot tube at present, the correction calibration coefficient of the L-shaped pitot tube is generally 0.99-1.01, the L-shaped pitot tube can keep a constant value in a large Mach number and Reynolds number range, and the L-shaped standard pitot tube is preferably selected when the air volume is measured in an air duct with small dust content. However, in the air volume testing process, the L-shaped standard pitot tube cannot be inserted because the air duct measuring hole tube seat is slender, so that the L-shaped standard pitot tube cannot be used.
Disclosure of Invention
To the problem, the utility model provides a L type standard pitot tube testing arrangement, it can be out of shape for L type or a style of calligraphy according to the demand initiative to the completion is tested to the wind channel of long and thin hole seat.
The utility model provides a L type standard pitot tube testing arrangement which characterized in that: the test gun comprises a test gun rod and a test gun head, wherein a pivot point is arranged at the lower end of one side of the test gun rod, which faces the test gun head, a fan-shaped worm gear is fixedly arranged at the rotating output end of the pivot point, the fan-shaped worm gear is fixedly connected with the body part of the test gun head through a connecting piece, the rear end part of a pressure transmission pipe is arranged in the inner cavity of the test gun rod, the front end of the pressure transmission pipe comprises a flexible bending part and a fixed part which goes deep into the test gun head, a transmission shaft which is axially and linearly arranged is also arranged in the inner cavity of the test gun rod, the rear end of the transmission shaft protrudes out of the test gun rod and is fixedly provided with an adjusting knob, a worm is fixedly arranged at the front end of the transmission shaft, the worm is meshed with the corresponding worm gear of the fan-shaped worm gear, and upper limiting bulges of the fan-shaped worm gear are respectively arranged at the two fan-shaped tail ends of the worm gear surface area of the fan-shaped worm gear, The lower limit protrusion of the fan-shaped worm gear is meshed with the front worm gear of the worm to clamp the lower limit protrusion of the fan-shaped worm gear, the rear end shell of the test gun head is tightly attached to the front end shell of the test gun rod to form a straight line shape, and when the upper limit protrusion of the fan-shaped worm gear is meshed with the rear end worm gear of the worm to clamp the upper limit protrusion of the fan-shaped worm gear, the upper shell of the rear end of the test gun head is separated from the front end shell of the test gun rod to form an L shape.
It is further characterized in that:
the inner cavity of the testing gun rod is respectively provided with a fixed clapboard corresponding to the two axial ends of the transmission shaft, the transmission shaft penetrates through the guide through holes corresponding to the fixed clapboards to be arranged, and the fixed clapboards axially limit the transmission shaft and enable the transmission shaft to rotate;
a movable avoidance cavity of the fan-shaped worm gear is formed at the front end shell of the testing gun rod, so that the reasonable arrangement of the fan-shaped worm gear in a linear state is ensured;
the rear end part of the pressure transmission pipe is provided with a laterally convex multifunctional connecting handle corresponding to the side part of the testing gun rod, and the multifunctional connecting handle is used for externally connecting an external pipeline;
the transmission shaft is made of stainless steel and is used for transmitting the force of the adjusting knob to the worm;
the worm is made of stainless steel and is meshed with the fan-shaped worm gear, the force transmitted by the transmission shaft is amplified and transmitted to the fan-shaped worm gear by the worm gear of the worm, and meanwhile, the force transmission direction can not be reversely transmitted, so that the worm is in a stable state, and the L-shaped standard pitot tube can not be changed into other shapes;
the fan-shaped worm gear is made of stainless steel 304, is fixed by taking the pivot point as a circle center and is used for driving the test gun head to rotate by taking the pivot point as the circle center through the force transmitted by the worm;
the upper limiting bulge of the fan-shaped worm gear is positioned at the upper part of the fan-shaped worm gear, and the gun head is inserted into the air duct and cannot be seen, so that the L-shaped state of the test gun head and the extension part of the front part of the test gun rod can be ensured;
the lower limiting bulge of the fan-shaped worm gear is positioned at the lower part of the fan-shaped worm gear, and after the test is finished, the gun head can be inserted into the air duct and cannot be seen, so that the test gun head and the test gun rod can be ensured to be in a linear state through the lower limiting bulge;
the pivot point is fixedly connected to the lower part of the front extension part of the testing gun rod, and the rotating output end of the pivot point, the body part of the testing gun head and the fan-shaped worm gear are of an integrated structure and are used for connecting the testing gun rod, the testing gun head and the rotating fulcrum of the fan-shaped worm gear;
the pressure transmission pipe is specifically a corrugated pipe made of stainless steel 304, can be bent and deformed at will and is used for transmitting pressure;
the multifunctional connecting handle is made of stainless steel 304, the multifunctional connecting handle is positioned at the side face of the tail end of the testing extension rod and vertically extends out, the multifunctional connecting handle is connected with the pressure transmission pipe in parallel, and meanwhile, the multifunctional connecting handle and the pressure transmission pipe are in the same direction when being normally used with a standard pitot tube testing gun head, so that the direction control after the testing gun head is placed into an air duct is guaranteed.
After the technical scheme is adopted, the L-shaped standard Pitot testing device with the worm gear group capable of actively deforming, straightening and bending is utilized, and the difficulty that the L-shaped standard Pitot tube smoothly passes through the long and thin tube seat of the air duct due to the fact that the L-shaped standard Pitot tube is bent and straightened is solved by utilizing worm gear and worm combination transmission; the air duct testing device can be actively deformed into an L shape or a straight shape according to requirements, so that the air duct testing for the slender hole seat is completed.
Drawings
Fig. 1 is a schematic structural view (L-shaped) of the front view of the present invention;
the names corresponding to the sequence numbers in the figure are as follows:
The multifunctional connecting handle comprises an adjusting knob 1, a fixed partition plate 2, a transmission shaft 3, a worm 4, a fan-shaped worm gear 5, a movable avoiding cavity 51, an upper limiting bulge 6 of the fan-shaped worm gear, a lower limiting bulge 7 of the fan-shaped worm gear, a pivot point 8, a pressure transmission pipe 9, a flexible bending part 91, a fixed part 92 and a multifunctional connecting handle 10.
Detailed Description
An L-type standard pitot tube test device, see fig. 1: the testing gun comprises a testing gun rod 100 and a testing gun head 200, wherein a pivot point 8 is arranged at the lower end of one side of the testing gun rod 100 facing the testing gun head 200, a fan-shaped worm gear 5 is fixedly arranged at the rotating output end of the pivot point 8, the fan-shaped worm gear 5 is fixedly connected with the body part of the testing gun head 200 through a connecting piece, the rear end part of a pressure transmission pipe 9 is arranged in the inner cavity of the testing gun rod 100, the front end of the pressure transmission pipe 9 comprises a flexible bending part 91 and a fixed part 92 penetrating into the testing gun head, a transmission shaft 3 which is axially and linearly arranged is also arranged in the inner cavity of the testing gun rod 100, the rear end of the transmission shaft 3 protrudes out of the testing gun rod 100 and is fixedly provided with an adjusting knob 1, a worm 4 is fixedly arranged at the front end of the transmission shaft 3, the worm 4 is meshed with corresponding worm teeth of the fan-shaped worm teeth 5, and two fan-shaped upper limit position protrusions 6 are respectively arranged at two tail ends of the worm teeth surface area of the fan-shaped worm teeth 5, The lower limiting bulge 7 of the fan-shaped worm gear, when the front worm gear of the worm 4 is meshed and clamped with the lower limiting bulge 7 of the fan-shaped worm gear, the rear end shell 201 of the test gun head 200 is tightly attached to the front end shell 101 of the test gun rod 100 to form a straight line shape, when the rear end worm gear of the worm 4 is meshed and clamped with the upper limiting bulge 6 of the fan-shaped worm gear, the upper rear end shell 202 of the test gun head 200 is separated from the front end shell 101 of the test gun rod 100 to form an L shape.
The inner cavity of the testing gun rod 100 is respectively provided with a fixed clapboard 2 corresponding to the two axial ends of a transmission shaft 3, the transmission shaft 3 penetrates through a guide through hole corresponding to the fixed clapboard 2 to be arranged, and the fixed clapboard 2 axially limits the transmission shaft 3 and enables the transmission shaft 3 to be rotatable;
the front end shell 201 of the testing gun rod 100 is provided with a movable avoidance cavity 51 of the fan-shaped worm gear 5, so that the reasonable arrangement of the fan-shaped worm gear 5 in a linear state is ensured;
the rear end part of the pressure transmission pipe 9 is provided with a side convex multifunctional connecting handle 10 corresponding to the side part of the test gun rod 100, and the multifunctional connecting handle 10 is used for externally connecting an external pipeline;
the transmission shaft 3 is made of stainless steel and is used for transmitting the force of the adjusting knob to the worm;
the worm 4 is made of stainless steel and is meshed with the fan-shaped worm teeth 5, the force transmitted by the transmission shaft 3 is amplified and transmitted to the fan-shaped worm teeth 5 by the worm teeth of the worm 4, and meanwhile, the force transmission direction can not be reversely transmitted, so that the worm 4 is in a stable state, and the L-shaped standard pitot tube can not be changed into other shapes;
the fan-shaped worm gear 5 is made of stainless steel 304 and is fixed by taking a pivot point as a circle center, and is used for driving the test gun head 200 to rotate by taking the pivot point 8 as the circle center through the force transmitted by the worm 4;
the upper limiting bulge 6 of the fan-shaped worm gear is positioned at the upper part of the fan-shaped worm gear 5, and the gun head is inserted into the air duct and cannot be seen, so that the L-shaped state of the test gun head 200 and the front extension part 102 of the test gun rod 100 can be ensured;
the lower limiting bulge 7 of the fan-shaped worm gear is positioned at the lower part of the fan-shaped worm gear 5, and the test gun head 200 and the test gun rod 100 can be ensured to be in a linear state through the lower limiting bulge because the gun head is inserted into the air duct and cannot be seen after the test is finished;
the pivot point 8 is fixedly connected to the lower part of the front extension part 102 of the testing gun rod 100, and the rotating output end of the pivot point 8, the body part of the testing gun head 200 and the fan-shaped worm gear 5 are of an integrated structure and are used for connecting the testing gun rod, the testing gun head and the rotating fulcrum of the fan-shaped worm gear;
the pressure transmission pipe 9 is specifically a corrugated pipe made of stainless steel 304, can be bent and deformed at will and is used for transmitting pressure;
the multifunctional connecting handle 10 is made of stainless steel 304, is positioned at the side surface of the tail end of the testing extension rod and vertically extends out, and is connected with the pressure transmission pipe 9 in parallel, and simultaneously, the multifunctional connecting handle and the testing gun head 200 of a standard pitot tube are in the same direction when being normally used, so that the direction control after the testing gun head 200 is placed into an air duct is ensured.
The working principle is as follows: the fan-shaped worm wheel and the worm are combined to adjust the L-shaped standard pitot tube into a straight shape, then the pitot tube is placed into the tube seat, the L-shaped standard pitot tube is restored to the L-shaped state through adjusting the worm wheel and the worm after the pitot tube reaches the air duct, the air volume is tested, the standard pitot tube is deformed into the straight shape through adjusting the worm wheel and the worm after the test is finished, and finally the pitot tube is taken out through the tube seat, so that the problem that the L-shaped standard pitot tube cannot be inserted into the slender tube seat to test the air volume can be effectively solved.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The utility model provides a L type standard pitot tube testing arrangement which characterized in that: the test gun comprises a test gun rod and a test gun head, wherein a pivot point is arranged at the lower end of one side of the test gun rod, which faces the test gun head, a fan-shaped worm gear is fixedly arranged at the rotating output end of the pivot point, the fan-shaped worm gear is fixedly connected with the body part of the test gun head through a connecting piece, the rear end part of a pressure transmission pipe is arranged in the inner cavity of the test gun rod, the front end of the pressure transmission pipe comprises a flexible bending part and a fixed part which goes deep into the test gun head, a transmission shaft which is axially and linearly arranged is also arranged in the inner cavity of the test gun rod, the rear end of the transmission shaft protrudes out of the test gun rod and is fixedly provided with an adjusting knob, a worm is fixedly arranged at the front end of the transmission shaft, the worm is meshed with the corresponding worm gear of the fan-shaped worm gear, and upper limiting bulges of the fan-shaped worm gear are respectively arranged at the two fan-shaped tail ends of the worm gear surface area of the fan-shaped worm gear, The lower limit protrusion of the fan-shaped worm gear is meshed with the front worm gear of the worm to clamp the lower limit protrusion of the fan-shaped worm gear, the rear end shell of the test gun head is tightly attached to the front end shell of the test gun rod to form a straight line shape, and when the upper limit protrusion of the fan-shaped worm gear is meshed with the rear end worm gear of the worm to clamp the upper limit protrusion of the fan-shaped worm gear, the upper shell of the rear end of the test gun head is separated from the front end shell of the test gun rod to form an L shape.
2. The L-type standard pitot testing device of claim 1 wherein: the inner cavity of the testing gun rod is provided with fixed partition plates corresponding to the two axial ends of the transmission shaft respectively, the transmission shaft penetrates through the guide through holes corresponding to the fixed partition plates and is arranged in a limiting mode in the axial direction of the transmission shaft.
3. The L-type standard pitot testing device of claim 1 wherein: the front end shell of the testing gun rod is provided with a movable avoiding cavity with fan-shaped worm teeth.
4. The L-type standard pitot testing device of claim 1 wherein: the rear end part of the pressure transmission pipe is provided with a laterally convex multifunctional connecting handle corresponding to the side part of the testing gun rod, and the multifunctional connecting handle is used for externally connecting an external pipeline.
5. The L-type standard pitot testing device of claim 1 wherein: the upper limiting bulge of the fan-shaped worm gear is positioned at the upper part of the fan-shaped worm gear.
6. The L-type standard pitot testing device of claim 1 wherein: the lower limiting bulge of the fan-shaped worm gear is positioned at the lower part of the fan-shaped worm gear.
7. The L-type standard pitot testing device of claim 1 wherein: the pivot point is fixedly connected to the lower part of the front extension part of the test gun rod, and the rotation output end of the pivot point, the body part of the test gun head and the fan-shaped worm gear are of an integral structure.
8. The L-type standard pitot testing device of claim 1 wherein: the pressure transmission pipe is specifically a corrugated pipe made of stainless steel 304.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120497829.2U CN214308924U (en) | 2021-03-09 | 2021-03-09 | L-shaped standard pitot tube testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120497829.2U CN214308924U (en) | 2021-03-09 | 2021-03-09 | L-shaped standard pitot tube testing device |
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| CN214308924U true CN214308924U (en) | 2021-09-28 |
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| CN202120497829.2U Active CN214308924U (en) | 2021-03-09 | 2021-03-09 | L-shaped standard pitot tube testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945319A (en) * | 2021-03-09 | 2021-06-11 | 苏州西热节能环保技术有限公司 | L-shaped standard pitot tube testing device |
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2021
- 2021-03-09 CN CN202120497829.2U patent/CN214308924U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945319A (en) * | 2021-03-09 | 2021-06-11 | 苏州西热节能环保技术有限公司 | L-shaped standard pitot tube testing device |
| CN112945319B (en) * | 2021-03-09 | 2024-05-28 | 苏州西热节能环保技术有限公司 | L-shaped standard Pitot tube testing device |
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