CN211602353U - Air blocking device for air tightness detection and pressure static calibration of pneumatic probe - Google Patents
Air blocking device for air tightness detection and pressure static calibration of pneumatic probe Download PDFInfo
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- CN211602353U CN211602353U CN202020337298.6U CN202020337298U CN211602353U CN 211602353 U CN211602353 U CN 211602353U CN 202020337298 U CN202020337298 U CN 202020337298U CN 211602353 U CN211602353 U CN 211602353U
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Abstract
The utility model provides an air blocking device for air tightness detection and pressure static calibration of a pneumatic probe, which comprises a bottom plate, a bottom plate groove arranged on the bottom plate, and a front support plate, a probe tube support plate, a measuring unit support plate, a movable top plate and a rear support plate which are arranged on the bottom plate groove in sequence; the front supporting plate, the probe supporting plate, the measuring unit supporting plate and the rear supporting plate are all fixedly connected to the bottom plate groove. The device can be applicable to the gas tightness detection of traditional direction probe and integration probe simultaneously, can stop up all pressure sensing holes, static pressure port on the pneumatic probe, and then can once only carry out gas tightness detection and pressure static calibration to the pneumatic probe. When the air tightness of the pneumatic probe is detected or the pressure is statically calibrated, the device is used for blocking the air of the pneumatic probe, so that the accuracy and the reliability of the air tightness detection of the pneumatic probe and the pressure static calibration can be improved, the operation difficulty can be reduced, and the working efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of wind-tunnel flow field parameter measurement technique and specifically relates to a stifled gas device that is used for pneumatic probe gas tightness to detect and pressure static calibration.
Background
A pneumatic probe is a device for measuring flow field parameters in a wind tunnel. At present, the pneumatic probe in the wind tunnel mainly comprises a traditional directional probe and a gradually developed integrated probe. The traditional direction probe only comprises an air pressure probe, the front end of the air pressure probe is of a hemispherical structure, a plurality of pressure sensing holes are formed in a hemisphere, a plurality of static pressure holes are formed in the air pressure probe close to the hemisphere, a pressure leading pipe connected with the pressure sensing holes and the static pressure holes is arranged at the rear end of the air pressure probe, and the direction probe needs to be used in combination with an external pressure sensor, an amplifier, a data acquisition unit and the like; the integrated probe is an integrated measuring device formed by integrating an air pressure probe, a pressure sensor, an amplifier, a data collector and the like, and the device not only comprises the air pressure probe at the front end, but also comprises a measuring unit at the rear end of the air pressure probe. In general, before a blowing test is performed on a pneumatic probe in a wind tunnel, air tightness detection needs to be performed on the pneumatic probe, and in addition, pressure static calibration needs to be performed on an integrated probe.
At present, a commonly used air tightness detection method of a direction probe is to manually block a pressure sensing hole and a static pressure hole of the direction probe by hand, load fixed air pressure from a pressure guiding pipe at the rear end of the direction probe, and then judge the air tightness of the direction probe by observing whether an air leakage phenomenon exists or not; the air tightness detection method of the integrated probe also comprises the steps of manually blocking the pressure sensing hole and the static pressure hole of the integrated probe by hand, loading fixed air pressure from an air pressure calibration interface on the integrated probe measurement unit, and then judging the air tightness of the integrated probe by observing whether an air leakage phenomenon exists or not. When the integrated probe is used for pressure static calibration, the pressure sensing hole and the static pressure hole of the integrated probe are manually blocked, standard air pressure which meets the metrological calibration rule is loaded from an air pressure calibration interface on the integrated probe measurement unit, and then the pressure static calibration of the integrated probe is realized by comparing the pressure value collected by the measurement unit with the standard pressure value. The traditional method for detecting the air tightness and calibrating the pressure static state of the pneumatic probe mainly has the following defects: 1) the manual blocking of the pressure sensing hole and the static pressure hole of the pneumatic probe is unreliable, and the introduced gas is easy to leak from the hand position, so that the gas tightness detection and the static pressure calibration of the pneumatic probe are inaccurate. 2) All pressure sensing holes and static pressure holes in the pneumatic probe cannot be plugged manually at one time, so that the pneumatic probe cannot be subjected to air tightness detection and pressure static calibration at one time, the operation is inconvenient, and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a not enough to prior art exists, and provide a technical scheme that is used for stifled gas device of pneumatic probe gas tightness detection and pressure static calibration, the device can be applicable to the gas tightness detection of traditional direction probe and integration probe simultaneously, can all plug up pressure sensing hole, the static pressure port on the pneumatic probe, and then can once only carry out gas tightness detection and pressure static calibration to the pneumatic probe.
The scheme is realized by the following technical measures:
the utility model provides a stifled gas device that is used for pneumatic probe gas tightness to detect and static calibration of pressure which characterized by: the device comprises a bottom plate, a bottom plate groove arranged on the bottom plate, and a front support plate, a probe tube support plate, a measurement unit support plate, a movable top plate and a rear support plate which are sequentially arranged on the bottom plate groove; the front supporting plate, the probe supporting plate, the measuring unit supporting plate and the rear supporting plate are fixedly connected to the bottom plate groove; a guide shaft is arranged between the front supporting plate and the rear supporting plate; a sealing plug plate is arranged between the front support plate and the probe tube support plate; through holes are formed in the sealing blocking plate, the probe tube supporting plate, the measuring unit supporting plate and the movable top plate and hung on the guide shaft through the through holes; the front supporting plate is connected with the sealing blocking plate through a blocking plate screw, and a spring which is always in a compressed state is sleeved outside the blocking plate screw; be provided with the screw thread through-hole on the back backup pad, the back backup pad that the ejector screw can pass through the screw thread through-hole backs on the back wall of portable roof.
The scheme is preferably as follows: the top of the measuring unit supporting plate is of a U-shaped groove structure, the bottom of the U-shaped groove is semicircular, and the diameter of the semicircle is the same as that of the measuring unit shell of the used pneumatic probe.
The scheme is preferably as follows: the movable top plate consists of three front side plates, a middle plate and a rear side plate which are arranged in parallel; the top of the front side plate is of a double-U-shaped groove structure and is divided into a left U-shaped groove and a right U-shaped groove, the bottom of the U-shaped groove is semicircular, the semicircular diameter of the left U-shaped groove is the same as the diameter of a measuring unit shell of the pneumatic probe, and the semicircular diameter of the right U-shaped groove is 5mm smaller than that of the left U-shaped groove; the top of the middle plate is of a double-U-shaped groove structure and is divided into a left U-shaped groove and a right U-shaped groove, the bottom of the U-shaped groove is semicircular, the semicircular diameter of the left U-shaped groove is the same as the diameter of an air pressure probe of a pneumatic probe, and the semicircular diameter of the right U-shaped groove is 2mm smaller than that of the left U-shaped groove; the top of the rear side plate is of a U-shaped groove structure, the bottom of the U-shaped groove is semicircular, and the diameter of the semicircle is the same as that of an air pressure probe of the pneumatic probe.
The scheme is preferably as follows: the top of the probe supporting plate is of a U-shaped groove structure, the bottom of the U-shaped groove is semicircular, and the diameter of the semicircle is the same as that of the pneumatic probe.
The scheme is preferably as follows: the rear end face of the sealing blocking plate is provided with a hemispherical concave surface, and the diameter of the hemispherical concave surface is the same as that of the hemisphere at the front end of the air pressure probe of the pneumatic probe.
The scheme is preferably as follows: the front section of the blocking plate screw is in a thread shape, and the rear section of the blocking plate screw is in a cylindrical shape.
The scheme is preferably as follows: the whole section of the ejection screw is in a thread shape, and the tail part of the ejection screw is in a hand-screwing structure.
The scheme is preferably as follows: the device also comprises a hemispherical sealing gasket which can be assembled in the hemispherical concave surface of the sealing blocking plate and a sealing gasket seat which can be assembled outside the air pressure probe of the used pneumatic probe.
The scheme is preferably as follows: the inner diameter of the sealing ring seat is the same as the diameter of the air pressure probe of the pneumatic probe, and a sealing gasket is arranged inside the sealing ring seat and is made of rubber; the inner diameter of the hemispherical sealing gasket is the same as the diameter of a hemisphere at the front end of an air pressure probe of the pneumatic probe, and the hemispherical sealing gasket is made of rubber.
The scheme is preferably as follows: the semicircular circle centers of the U-shaped grooves of the probe tube supporting plate, the semicircular circle centers of the U-shaped grooves of the measuring unit supporting plate, the semicircular circle centers of all the U-shaped grooves on the movable top plate and the spherical center of the hemispherical concave surface of the sealing blocking plate are on the same axis.
The beneficial effect of this scheme can learn according to the statement to above-mentioned scheme, because at the device through unique structural design, can match the special construction of pneumatic probe, can once only plug up pressure sensing hole, the static pressure hole on the pneumatic probe to it is firm reliable. When the pneumatic probe carries out gas tightness detection or pressure static calibration, the device is used for blocking the gas to the pneumatic probe, so that the accuracy and the reliability of the gas tightness detection and the pressure static calibration of the pneumatic probe can be improved, the operation difficulty can be reduced, and the working efficiency is improved.
Therefore, compared with the prior art, the utility model has the substantive characteristics and the progress, and the beneficial effects of the implementation are also obvious.
Drawings
Fig. 1 is a schematic view of the structure of the device of the present invention.
FIG. 2 is a schematic view of the installation of the directional probe for air tightness detection.
FIG. 3 is a schematic view of the integrated probe gas tightness detection and pressure static calibration installation.
In the figure, 1 is a bottom plate, 2 is a front supporting plate, 3 is a sealing blocking plate, 4 is a probe supporting plate, 5 is a measuring unit supporting plate, 6 is a movable top plate, 7 is a rear supporting plate, 8 is a blocking plate screw, 9 is a guide shaft, 10 is a pushing screw, 11 is a hemispherical sealing gasket, 12 is a sealing ring seat, 13 is a spring, 14 is a bottom plate groove, 15 is an air pressure probe, 16 is a measuring unit, 17 is a pressure guiding pipe, and 18 is an air pressure calibration interface.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As can be seen from the figures 1, 2 and 3, the structure of the scheme comprises a bottom plate, a front supporting plate, a sealing blocking plate, a probe supporting plate, a measuring unit supporting plate, a movable top plate, a rear supporting plate, a blocking plate screw, a guide shaft, a pushing screw, a hemispherical sealing gasket, a sealing ring seat and a spring. 2 bottom plate grooves are arranged on the bottom plate; the front supporting plate is fixed on the bottom plate through a screw and a nut; 2 guide shaft threaded holes are arranged in the horizontal direction of the front support plate, and 2 screw through holes are arranged in the vertical direction; one end of each guide shaft is in a thread shape, the guide shafts are screwed into guide shaft threaded holes of the front support plate through threads, and the number of the guide shafts is 2; the sealing blocking plate, the probe tube supporting plate, the measuring unit supporting plate, the movable top plate and the rear supporting plate are respectively provided with 2 guide shaft through holes in the horizontal direction, and the sealing blocking plate, the probe tube supporting plate, the measuring unit supporting plate, the movable top plate and the rear supporting plate are hung on the guide shafts through the guide shaft through holes; the probe tube supporting plate, the measuring unit supporting plate and the rear supporting plate are fixed on the bottom plate through screws and nuts; 2 threaded holes are arranged in the vertical direction on the left side of the sealing blocking plate; the plug plate screws penetrate through screw through holes of the front support plate and are screwed into threaded holes in the sealing plug plate, and the number of the plug plate screws is 2; 2 springs are arranged between the front support plate and the sealing plug plate and sleeved outside the plug plate screw; a thread through hole is arranged in the middle of the rear supporting plate, and the ejector screw is screwed into the rear supporting plate through the thread through hole in the rear supporting plate and abuts against the movable top plate.
The right side of the sealing blocking plate is provided with a hemispherical concave surface, and the diameter of the concave surface is the same as the diameter of a hemisphere at the front end of an air pressure probe of the used pneumatic probe.
The top of the probe supporting plate is of a U-shaped groove structure, the bottom of the U-shaped groove is semicircular, and the diameter of the semicircle is the same as that of the pneumatic probe.
The top of the measuring unit supporting plate is of a U-shaped groove structure, the bottom of the U-shaped groove is semicircular, and the diameter of the semicircle is the same as that of the measuring unit shell of the used pneumatic probe.
The movable top plate of the movable top plate is of a Chinese character 'shan' structure consisting of three front side plates, a middle plate and a rear side plate which are arranged in parallel. The top of the front side plate of the movable top plate is of a double-U-shaped groove structure and is divided into a left U-shaped groove and a right U-shaped groove, the bottom of the U-shaped groove is semicircular, the semicircular diameter of the left U-shaped groove is the same as the diameter of a measuring unit shell of the pneumatic probe, and the semicircular diameter of the right U-shaped groove is 5mm smaller than that of the left U-shaped groove.
The middle plate top of the movable top plate is of a double-U-shaped groove structure and is divided into a left U-shaped groove and a right U-shaped groove, the bottom of the U-shaped groove is semicircular, the semicircular diameter of the left U-shaped groove is the same as the air pressure probe diameter of the pneumatic probe, and the semicircular diameter of the right U-shaped groove is 2mm smaller than that of the left U-shaped groove.
The top of the rear side plate of the movable top plate is of a U-shaped groove structure, the bottom of the U-shaped groove is semicircular, and the diameter of the semicircle is the same as that of the pneumatic probe.
The front section of the blocking plate screw is in a thread shape, and the rear section of the blocking plate screw is in a cylindrical shape.
The whole section of the ejection screw is in a thread shape, and the tail part of the ejection screw is in a hand-screwing structure.
The vertical direction in bottom plate groove is type structure, and bottom plate groove lower extreme is wider than the upper end, and the lower extreme in bottom plate groove is used for placing the hexagon nut.
The scheme is preferably as follows: the inner diameter of the hemispherical sealing gasket is the same as the diameter of a hemisphere at the front end of the air pressure probe of the pneumatic probe, and the hemispherical sealing gasket is made of rubber.
The scheme is preferably as follows: the inner diameter of the sealing ring seat is the same as the diameter of the air pressure probe of the pneumatic probe, a sealing gasket is arranged inside the sealing ring seat, and the sealing gasket is made of rubber.
The scheme is preferably as follows: the semicircular circle centers of the U-shaped grooves of the probe tube supporting plate, the semicircular circle centers of the U-shaped grooves of the measuring unit supporting plate, the semicircular circle centers of all the U-shaped grooves on the movable top plate and the spherical center of the hemispherical concave surface of the sealing blocking plate are on the same axis.
Example 1:
before transonic wind tunnel blowing test, adopt the utility model discloses the device carries out the gas tightness to this wind-tunnel traditional direction probe and detects. The hemisphere diameter of the atmospheric pressure probe front end of this direction probe is 8mm, and atmospheric pressure probe diameter is 8mm, and atmospheric pressure probe length is 100mm, and the aperture of last pressure sensing hole of atmospheric pressure probe and static pressure hole is 0.5 mm.
The front supporting plate is placed on the bottom plate and is fixed by a screw and a nut; the two guide shafts are screwed into the guide shaft threaded holes of the front support plate; the sealing blocking plate, the probe tube supporting plate, the measuring unit supporting plate, the movable top plate and the rear supporting plate are sequentially hung on the guide shaft from back to front; the probe supporting plate, the measuring unit supporting plate and the rear supporting plate are respectively fixed on the bottom plate through screws and nuts; after the two plug plate screws penetrate through the screw through holes of the front supporting plate, the springs are sleeved on the screws and screwed into the threaded holes in the left side of the sealing plug plate, so that a certain slight pre-tightening force of the springs is ensured; the ejector screw is screwed into the rear supporting plate from the ejector threaded hole on the rear supporting plate and abuts against the movable top plate; the sealing ring seat penetrates into the air pressure detecting tube of the direction probe and is fixed at a static pressure hole of the air pressure detecting tube; the hemispherical sealing gasket is sleeved in the front end of the air pressure probe.
The front end of the air pressure detecting tube of the direction probe is arranged at the hemispherical concave surface of the sealing blocking plate, the middle part of the air pressure detecting tube of the direction probe is arranged on the detecting tube supporting plate, and the tail part of the air pressure detecting tube of the direction probe is arranged in a left U-shaped groove of the middle plate of the movable top plate; screwing a rear-end ejector screw to push the movable top plate to move forwards, moving the direction probe axially under the action of the axial force of the movable top plate, extruding the hemispherical sealing gasket by the direction probe and the sealing plug, and sealing the air pressure detecting tube pressure sensing hole of the direction probe by the hemispherical sealing gasket; and loading fixed air pressure from a pressure guiding pipe at the rear end of an air pressure probe of the direction probe by adopting a standard pressure source, observing the stable condition of the pressure value, indicating that the air tightness of the direction probe is good if the pressure value is stable, and indicating that the air tightness of the direction probe is not good if the pressure is unstable.
Example 2:
before a certain low-speed wind tunnel blowing test, adopt the utility model discloses the device carries out gas tightness detection and pressure static calibration to the integrated probe of this wind tunnel. The hemisphere diameter of the front end of the air pressure probe of the integrated probe is 12mm, the diameter of the air pressure probe is 12mm, the length of the air pressure probe is 290mm, the aperture of a pressure sensing hole and the aperture of a static pressure hole in the air pressure probe are 0.8mm, the diameter of a shell of a measuring unit of the integrated probe is 40mm, and the length of the shell of the measuring unit is 248 mm.
The front supporting plate is placed on the bottom plate and is fixed by a screw and a nut; the two guide shafts are screwed into the guide shaft threaded holes of the front support plate; the sealing blocking plate, the probe tube supporting plate, the measuring unit supporting plate, the movable top plate and the rear supporting plate are sequentially hung on the guide shaft from back to front; the probe supporting plate, the measuring unit supporting plate and the rear supporting plate are respectively fixed on the bottom plate through screws and nuts; after the two plug plate screws penetrate through the screw through holes of the front supporting plate, the springs are sleeved on the screws and screwed into the threaded holes of the sealing plug plates, so that the springs are ensured to have a certain slight pre-tightening force; the ejector screw is screwed into the rear supporting plate from the ejector threaded hole on the rear supporting plate and abuts against the movable top plate; the sealing ring seat penetrates through the air pressure detecting tube of the integrated probe and is fixed at a static pressure hole of the air pressure detecting tube; the hemispherical sealing gasket is sleeved in the front end of the air pressure probe.
The front end of the air pressure probe of the integrated probe is arranged at the hemispherical concave surface of the sealing blocking plate, the middle part of the air pressure probe of the integrated probe is arranged on the probe supporting plate, the middle part of the measuring unit of the integrated probe is arranged on the measuring unit supporting plate, and the tail part of the measuring unit of the integrated probe is arranged in a left U-shaped groove of the front side plate of the movable top plate; screwing a rear-end ejector screw to push a movable top plate to move forwards, moving the integrated probe along the axial direction under the action of the axial force of the movable top plate, extruding the hemispherical sealing gasket by the integrated probe and the sealing plug, and sealing the pressure sensing hole of the air pressure probe of the integrated probe by the hemispherical sealing gasket; and loading fixed air pressure from an air pressure calibration interface on the integrated probe measurement unit by using a standard pressure source, observing the stable condition of the pressure value, indicating that the air tightness of the integrated probe is good if the pressure value is stable, and indicating that the air tightness of the integrated probe is not good if the pressure is unstable. After the integrated probe airtightness detection is completed and the detection is qualified, a standard pressure source loads standard air pressure which accords with the metrological verification procedure from an air pressure calibration interface on the integrated probe measurement unit, and the pressure value measured by the integrated probe measurement unit is compared with the standard pressure value, so that the static pressure calibration of the integrated probe is realized.
The present invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification, and to any novel method or process steps or any novel combination of features disclosed.
The present invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification, and to any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. The utility model provides a stifled gas device that is used for pneumatic probe gas tightness to detect and static calibration of pressure which characterized by: the device comprises a bottom plate, a bottom plate groove arranged on the bottom plate, and a front support plate, a probe tube support plate, a measurement unit support plate, a movable top plate and a rear support plate which are sequentially arranged on the bottom plate groove; the front supporting plate, the probe supporting plate, the measuring unit supporting plate and the rear supporting plate are fixedly connected to the bottom plate groove; a guide shaft is arranged between the front supporting plate and the rear supporting plate; a sealing blocking plate is arranged between the front supporting plate and the probe supporting plate; through holes are formed in the sealing blocking plate, the probe tube supporting plate, the measuring unit supporting plate and the movable top plate and hung on the guide shaft through the through holes; the front supporting plate is connected with the sealing blocking plate through a blocking plate screw, and a spring which is always in a compressed state is sleeved outside the blocking plate screw; be provided with the screw thread through-hole on the back backup pad, the back backup pad that the ejector screw can pass through the screw thread through-hole backs on the back wall of portable roof.
2. The air blocking device for air tightness detection and pressure static calibration of the pneumatic probe as claimed in claim 1, wherein: the top of the measuring unit supporting plate is of a U-shaped groove structure, the bottom of the U-shaped groove is semicircular, and the diameter of the semicircle is the same as that of the measuring unit shell of the used pneumatic probe.
3. The air blocking device for air tightness detection and pressure static calibration of the pneumatic probe as claimed in claim 1, wherein: the movable top plate consists of three front side plates, a middle plate and a rear side plate which are arranged in parallel; the top of the front side plate is of a double-U-shaped groove structure and is divided into a left U-shaped groove and a right U-shaped groove, the bottom of the U-shaped groove is semicircular, the semicircular diameter of the left U-shaped groove is the same as the diameter of a measuring unit shell of the pneumatic probe, and the semicircular diameter of the right U-shaped groove is 5mm smaller than that of the left U-shaped groove; the top of the middle plate is of a double-U-shaped groove structure and is divided into a left U-shaped groove and a right U-shaped groove, the bottom of the U-shaped groove is semicircular, the semicircular diameter of the left U-shaped groove is the same as the diameter of an air pressure probe of a pneumatic probe, and the semicircular diameter of the right U-shaped groove is 2mm smaller than that of the left U-shaped groove; the top of the rear side plate is of a U-shaped groove structure, the bottom of the U-shaped groove is semicircular, and the diameter of the semicircle is the same as that of an air pressure probe of the pneumatic probe.
4. The air blocking device for air tightness detection and pressure static calibration of the pneumatic probe as claimed in claim 1, wherein: the top of the probe supporting plate is of a U-shaped groove structure, the bottom of the U-shaped groove is semicircular, and the diameter of the semicircle is the same as that of the pneumatic probe.
5. The air blocking device for air tightness detection and pressure static calibration of the pneumatic probe as claimed in claim 1, wherein: the rear end face of the sealing blocking plate is provided with a hemispherical concave surface, and the diameter of the hemispherical concave surface is the same as that of the hemisphere at the front end of the air pressure probe of the pneumatic probe.
6. The air blocking device for air tightness detection and pressure static calibration of the pneumatic probe as claimed in claim 1, wherein: the front section of the blocking plate screw is in a thread shape, and the rear section of the blocking plate screw is in a cylindrical shape.
7. The air blocking device for air tightness detection and pressure static calibration of the pneumatic probe as claimed in claim 1, wherein: the whole section of the ejection screw is in a thread shape, and the tail part of the ejection screw is in a hand-screwing structure.
8. The air blocking device for air tightness detection and pressure static calibration of the pneumatic probe as claimed in claim 5, wherein: the device also comprises a hemispherical sealing gasket which can be assembled in the hemispherical concave surface of the sealing blocking plate and a sealing gasket seat which can be assembled outside the air pressure probe of the used pneumatic probe.
9. The air blocking device for air tightness detection and pressure static calibration of the pneumatic probe as claimed in claim 8, wherein: the inner diameter of the sealing ring seat is the same as the diameter of an air pressure probe of the pneumatic probe, a sealing gasket is arranged inside the sealing ring seat, and the sealing gasket is made of rubber; the inner diameter of the hemispherical sealing gasket is the same as the diameter of a hemisphere at the front end of an air pressure probe of the pneumatic probe, and the hemispherical sealing gasket is made of rubber.
10. The air-lock device for air-tightness detection and pressure static calibration of the pneumatic probe as claimed in one of claims 2 to 4, wherein: the semicircular circle centers of the U-shaped grooves of the probe tube supporting plate, the semicircular circle centers of the U-shaped grooves of the measuring unit supporting plate, the semicircular circle centers of all the U-shaped grooves on the movable top plate and the spherical center of the hemispherical concave surface of the sealing blocking plate are on the same axis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020337298.6U CN211602353U (en) | 2020-03-18 | 2020-03-18 | Air blocking device for air tightness detection and pressure static calibration of pneumatic probe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020337298.6U CN211602353U (en) | 2020-03-18 | 2020-03-18 | Air blocking device for air tightness detection and pressure static calibration of pneumatic probe |
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| CN211602353U true CN211602353U (en) | 2020-09-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122108A (en) * | 2020-03-18 | 2020-05-08 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | Air blocking device for air tightness detection and pressure static calibration of wind tunnel pneumatic probe |
-
2020
- 2020-03-18 CN CN202020337298.6U patent/CN211602353U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122108A (en) * | 2020-03-18 | 2020-05-08 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | Air blocking device for air tightness detection and pressure static calibration of wind tunnel pneumatic probe |
| CN111122108B (en) * | 2020-03-18 | 2024-04-30 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | Air blocking device for air tightness detection and static pressure calibration of wind tunnel pneumatic probe |
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