CN113074902B - Quantitative release test device for throwing object - Google Patents
Quantitative release test device for throwing object Download PDFInfo
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- CN113074902B CN113074902B CN202110273927.2A CN202110273927A CN113074902B CN 113074902 B CN113074902 B CN 113074902B CN 202110273927 A CN202110273927 A CN 202110273927A CN 113074902 B CN113074902 B CN 113074902B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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Abstract
The invention belongs to the related technical field of wind tunnel experiments and discloses a quantitative release test device for a throwing object. The device comprises a driving module and a throwing object releasing module, wherein the throwing object releasing module comprises an air compressor, a collecting pipe and a conduit bundle, the conduit bundle is used for placing a throwing object to be thrown, and the air compressor is used for blowing air into the collecting pipe to adjust the air pressure in the conduit bundle so as to drive the throwing object to release; the driving module comprises a spring, a guide plate and a stop pin, the guide plate is provided with a plurality of holes which are in one-to-one correspondence with the opening ends of the guide pipe bundles, the position correspondence between the holes on the guide plate and the opening ends of the guide pipe bundles is changed, and the switching of the opening and closing states of the opening ends of the guide pipe bundles is realized; the method simulates the multiple continuous or periodic quantitative release process of the throwing object in the wind tunnel experiment by controlling the opening time and the opening period of the opening end of the guide pipe bundle. The method provided by the invention can truly and effectively simulate the throwing process of the throwing object in the wind tunnel experiment, and provides favorable guidance for the follow-up research of the throwing track and the cluster distribution characteristics of the throwing object.
Description
Technical Field
The invention belongs to the related technical field of wind tunnel experiments, and particularly relates to a quantitative release test device for a throwing object.
Background
In recent years, tornado disasters occur frequently around the world, and great loss is caused to the life and property safety of people. The national climate center teaches that tornadoes are small-scale, violent-rotating air vortices that are generated in strongly unstable weather conditions, and that are extremely destructive despite their short life history. The tornado can roll up and carry various throwing objects such as tiles, doors and windows, fragments, sundries and the like, and the various throwing objects are sucked into the air to rotate at high speed and then are thrown out, which can cause huge impact damage to nearby buildings. The tossing object is the most important and even the only disaster-causing factor of tornado to the city key buildings (such as schools, hospitals and the like), but in view of the limitation of test devices and test means, only few experimental researches on tornado tossing objects exist at home and abroad at present, and few related numerical simulations only stay at a qualitative level due to lack of experimental verification. Under the large background that urbanization of China is rapidly developed, tornadoes frequently occur in regions with dense population in the south east coast, and serious casualties and property loss are caused, the relevant research on the tornado throwing substance is urgently needed to be developed.
Currently, students have a certain experimental research foundation for the motion track of the thrown object after being rolled up and the impact injury to nearby buildings. To achieve such experimental simulation, it is necessary to make a device for the quantitative release of a fly-thrower. After tornado is simulated in a wind tunnel test, the device is placed in front of the tornado and started to release the throwing object quantitatively, so that the test simulation of the tornado carrying ground fragments (throwing objects) is realized, and some key states of the throwing object moving in the air are researched quantitatively.
For example, Sterling professor teams have developed a flighting release device using pneumatic actuation to achieve a single release of a flighting in a simulator for wind tunnel testing. However, the release of multiple flyweights, and the study of considering both quantitative release and multiple release, is still inadequate. Therefore, it is necessary to perform further research and design to realize the quantitative and multiple release of the thrower in the wind tunnel test, and the distribution characteristics of the thrower clusters can be studied and studied more deeply by this test technique.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a quantitative release test device for a throwing object, which simulates multiple continuous or periodic quantitative release processes of the throwing object in a wind tunnel experiment through the structural design of a throwing object release module and a driving module, and has the advantages of simple structure, convenient operation, accurate quantitative control and the like.
To achieve the above object, according to one aspect of the present invention, there is provided a device for quantitatively releasing a flying object, characterized in that the device comprises a driving module and a flying object releasing module, wherein,
the device comprises a flying throw releasing module, a collecting pipe and a conduit bundle, wherein the conduit bundle is connected with the collecting pipe and is used as a branch of the collecting pipe, the conduit bundle is used for placing flying throws to be thrown, and the air compressor is arranged at one end of the collecting pipe and is used for blowing air into the collecting pipe to adjust air pressure in the conduit bundle so as to drive the flying throws to be thrown to release;
the driving module comprises a spring, a guide plate and a stop pin, the guide plate is arranged above the guide pipe bundle, a plurality of holes which are in one-to-one correspondence with the opening end of the guide pipe bundle are formed in the guide plate, and the spring and the stop pin move in a matched mode so as to change the position corresponding relation between the holes in the guide plate and the opening end of the guide pipe bundle and further realize the switching of the opening or closing state of the opening end of the guide pipe bundle; the multiple continuous or periodic quantitative release of the throwing object is realized by controlling the opening time and the opening period of the opening end of the guide pipe bundle, so that the multiple continuous or periodic quantitative release process of the throwing object in a wind tunnel experiment is simulated.
Further preferably, the cross section of the stop pin is in a diamond shape, the length of a diagonal line of the diamond shape is different, the vertex of the stop pin is in contact with one end of the guide plate, and the stop pin is rotated around the center of the stop pin, so that the guide plate moves back and forth.
Further preferably, the spring is in a compressed state and is disposed at one end of the guide plate to apply a pushing force to the guide plate.
Further preferably, a stop valve is further arranged in the collecting pipe, and is arranged at one end of the air compressor and used for opening or closing the collecting pipe.
Further preferably, the apparatus further comprises a drive motor for driving the movement of the stop valve and the stop pin.
Further preferably, the driving module further comprises limiting plates which are arranged on the upper side and the lower side of the guide plate, so that the guide plate is prevented from moving up and down in the front and back movement process.
Further preferably, the number of the conduit bundles is one or more, a plurality of the conduit bundles are all communicated with the collecting pipe, and the shape of the opening end of each conduit bundle is not limited and is selected according to the shape of the throwing object to be thrown.
Generally, compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. according to the invention, through setting the air compressor, the collecting pipe and the conduit bundle, different release rates of the throwing object can be realized by adjusting the rotation frequency of the driving motor and the air pressure value of the air compressor, and the release states of continuous release or periodic (intermittent) release and the like of the throwing object are realized, so that the throwing process of the throwing object in a wind tunnel experiment is simulated really and effectively, and favorable guidance is provided for the follow-up research of the throwing track and the cluster distribution characteristic of the throwing object;
2. the volume of the guide pipe bundle can be controlled by the design of the guide pipe bundle, particularly the number and the longitudinal length of the guide pipe bundle, the section shape of the guide pipe bundle can be set according to the shape of the throwing object, the guide pipe bundle has variability and variability, the simultaneous release of multiple or multiple throwing objects has the advantages that the study on the cluster distribution characteristics of the throwing objects in the wind tunnel test is more facilitated, and besides all the guide pipe bundles are filled with the throwing objects, the release of the single throwing object can be realized by filling only a single throwing object in a single guide pipe bundle.
Drawings
FIG. 1 is a schematic diagram of the construction of a device for the quantitative release of a fly-throws test constructed in accordance with a preferred embodiment of the invention;
figure 2 is a top view of a device for testing the quantitative release of a fly-throws constructed in accordance with a preferred embodiment of the invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
the device comprises a 1-guide pipe bundle, a 2-throwing object, a 3-stop valve, a 4-air compressor, a 5-guide plate, a 6-spring, a 7-stop pin, an 8-driving motor, a 9-collecting pipe and a 10-limiting plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the device for quantitatively releasing a throwing substance provided by the present invention comprises a driving module and a throwing substance releasing module, wherein:
the device comprises a flying throw releasing module, a collecting pipe and a conduit bundle, wherein the conduit bundle is connected with the collecting pipe and is used as a branch of the collecting pipe, the conduit bundle is used for placing flying throws to be thrown, and the air compressor is arranged at one end of the collecting pipe and is used for blowing air into the collecting pipe to adjust air pressure in the conduit bundle so as to drive the flying throws to be thrown to release;
the driving module comprises a spring, a guide plate and a stop pin, the guide plate is arranged above the guide pipe bundle, a plurality of holes which are in one-to-one correspondence with the opening end of the guide pipe bundle are formed in the guide plate, and the spring and the stop pin move in a matched mode so as to change the position corresponding relation between the holes in the guide plate and the opening end of the guide pipe bundle and further realize the switching of the opening or closing state of the opening end of the guide pipe bundle; the release of the throws through controlling the opening time and the opening period of the opening end of the guide pipe bundle is realized for multiple continuous or periodic quantitative release, so that the multiple continuous or periodic quantitative release process of the throws in the wind tunnel experiment is simulated.
The guide pipe bundle 1 is filled with a flying throw object 2, a stop valve 3 is arranged at the gathering position of the guide pipe bundle and connected with an air compressor 4, the air compressor can adjust the air pressure in the guide pipe bundle to drive the flying throw object 2 to release, a hole is formed in a position, corresponding to a release port of the guide pipe bundle 1, of a guide plate 5, one end of the guide plate 5 is connected with one end of a spring 6, one end of the spring is connected with a stop pin 7, the stop pin 7 is driven by a driving motor 8 to rotate according to a specified frequency so as to drive the guide plate 5 to vibrate periodically, the release port of the guide pipe bundle 1 is controlled to open and close periodically, the stop valve 3 is also connected with the driving motor 8 and is opened and closed at the same frequency as the stop pin 7, and the release rate of the flying throw object 2 is adjusted by adjusting the rotation frequency of the driving motor 8 and the air pressure value of the air compressor 4. In addition, the shape of the guide pipe bundle 1 and the opening shape of the guide plate 5 can be set according to the shape of the throwing object, so that the throwing objects with different shapes can be released, and the single throwing object can be released in a mode of filling the single guide pipe bundle 1 with the single throwing object; the upper end of the longitudinal shaft of the driving motor 8 is connected with a stop pin, the lower end of the longitudinal shaft is connected with a stop valve, the stop pin drives a guide plate, and the stop valve controls the starting and stopping of the air compressor, so that synchronous generation of driving air pressure and the starting and stopping states of a release opening of a throwing object is skillfully realized.
As shown in fig. 2, the stop pin 7 is a diamond-shaped column without edges and corners, which is specially processed, the length of the diagonal of the diamond is unequal, and four corners of the diamond-shaped column are subjected to a special round chamfering process, so that the stop pin is more suitable for interaction with the guide plate 5, and the guide plate is guided to be dislocated and reset relative to the guide pipe opening, so as to open and close the guide pipe bundle release opening. The vertex of the stop pin 7 is contacted with one end of the guide plate 5, and the stop pin 7 is rotated around the center of the stop pin 7, so that the guide plate 5 moves back and forth; the spring is in a compressed state and is arranged at one end of the guide plate 5 to apply thrust to the guide plate; the driving module further comprises limiting plates 10 which are arranged on the upper side and the lower side of the guide plate 5 and are used for limiting only the transverse degree of freedom of the guide plate 5 on the one hand and playing a role of a slide rail for the guide plate 5 in the direction of the degree of freedom on the other hand.
In an actual test, after the assembly of each component of the test device is completed, the C language is used for completing the programming of a control program of the driving motor and the manufacturing of a control circuit on the single chip microcomputer, so that the periodic opening and closing control of the guide plate and the stop valve is realized, and the working performance of each component is tested.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A device for testing the quantitative release of a throwing object is characterized by comprising a throwing object release module and a driving module, wherein,
the device comprises a flying throw releasing module, a collecting pipe and a conduit bundle, wherein the conduit bundle is connected with the collecting pipe and is used as a branch of the collecting pipe, the conduit bundle is used for placing flying throws to be thrown, and the air compressor is arranged at one end of the collecting pipe and is used for blowing air into the collecting pipe to adjust air pressure in the conduit bundle so as to drive the flying throws to be thrown to release;
the driving module comprises a spring, a guide plate and a stop pin, the guide plate is arranged above the guide pipe bundle, a plurality of holes which are in one-to-one correspondence with the opening end of the guide pipe bundle are formed in the guide plate, and the spring and the stop pin move in a matched mode so as to change the position corresponding relation between the holes in the guide plate and the opening end of the guide pipe bundle and further realize the switching of the opening or closing state of the opening end of the guide pipe bundle; the multiple continuous or periodic quantitative release of the throwing object is realized by controlling the opening time and the opening period of the opening end of the guide pipe bundle, so that the multiple continuous or periodic quantitative release process of the throwing object in a wind tunnel experiment is simulated.
2. The quantitative release testing device for the thrown object of claim 1, wherein the stop pin has a diamond-shaped cross section with different diagonal lengths, and the apex of the stop pin contacts with one end of the guide plate, and the stop pin is rotated around the center of the stop pin to move the guide plate back and forth.
3. The apparatus for testing quantitative release of a flyer according to claim 1, wherein the spring is in a compressed state and is disposed at one end of the guide plate to apply a pushing force to the guide plate.
4. The apparatus for testing quantitative release of a flyweight according to claim 1, wherein a stop valve is further provided in the manifold, and the stop valve is provided at one end of the air compressor for opening or closing the manifold.
5. The apparatus for testing the quantitative release of a flyweight of claim 4, further comprising a drive motor for driving the movement of the stop valve and the stop pin.
6. The device for testing the quantitative release of a throwing object according to claim 1, wherein the driving module further comprises limiting plates which are arranged at the upper side and the lower side of the guide plate to prevent the guide plate from moving up and down in the process of moving back and forth.
7. A device for testing the quantitative release of a throwing substance according to any one of claims 1 to 6, wherein the number of the conduit bundles is one or more, a plurality of the conduit bundles are connected to the manifold, and the shape of the open end of each conduit bundle is not limited and is selected according to the shape of the throwing substance to be thrown.
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| CN202110273927.2A CN113074902B (en) | 2021-03-15 | 2021-03-15 | Quantitative release test device for throwing object |
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| CN202110273927.2A CN113074902B (en) | 2021-03-15 | 2021-03-15 | Quantitative release test device for throwing object |
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| CN113074902B true CN113074902B (en) | 2022-01-11 |
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| KR20200130075A (en) * | 2019-05-07 | 2020-11-18 | 이리에 고켕 가부시키가이샤 | Gate valve |
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