CN107831420B - Movable wind sand weather simulation experiment system with accurate and controllable concentration and uniform sand discharge - Google Patents
Movable wind sand weather simulation experiment system with accurate and controllable concentration and uniform sand discharge Download PDFInfo
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- CN107831420B CN107831420B CN201711038114.5A CN201711038114A CN107831420B CN 107831420 B CN107831420 B CN 107831420B CN 201711038114 A CN201711038114 A CN 201711038114A CN 107831420 B CN107831420 B CN 107831420B
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- 239000004576 sand Substances 0.000 title claims abstract description 81
- 238000004088 simulation Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
Abstract
The invention discloses a movable wind-blown sand weather simulation experiment system with accurate concentration, controllable concentration and uniform sand discharge, and relates to the technical field of devices for corona characteristic tests. The system comprises a high-pressure air jet system and a precise and uniform sand feeding system. The high-pressure air injection subsystem comprises an air compressor, an air storage tank, an air distribution bag, an electromagnetic valve remote control device and a Venturi tube, wherein the electromagnetic valve and the electromagnetic valve remote control device are connected through a cable, the rest parts are sequentially connected through a pressure-resistant air tube, the air supply pressure of the air storage tank is controlled through adjusting the electromagnetic valve, and high-pressure air enters the Venturi tube; the accurate and uniform sand feeding system comprises a storage hopper, a vibration device, a butterfly valve, a sand grain caching device and a base. The sand is fed into the sand particle caching device from the storage hopper through a butterfly valve. The system has the advantages of low cost, mobility, continuous sand production and long diffusion distance.
Description
Technical Field
The invention relates to the technical field of devices for corona characteristic tests, in particular to a movable wind-blown sand weather simulation experiment system with accurate, controllable and uniform concentration for sand discharge.
Background
The wind and sand weather may cause changes in the electric field and particle flow around the transmission line, which may worsen the corona characteristics of the transmission line, and may even cause line tripping and large area power outage. Therefore, the experiment simulation of the corona characteristic of the high-voltage wire in the sand blown weather has important reference significance for the erection and operation safety of the power transmission line.
The traditional wind-blown sand weather simulation mostly uses large wind tunnel equipment, and has the advantages of large floor area, no movement, uncontrollable sand outlet concentration and high experimental cost. The requirements of simulating different altitudes and frequent tests cannot be met. The sand wind weather simulation device which is formed by assembling two sections of air pipes with different heights, a frequency converter, a feeder and the like in recent years is close to the experimental requirements to a certain extent, but still has the defects that the used air pipes have larger specifications and are not easy to move; the wind speed at the outlet is too low to enable sand to be diffused to the periphery of the required power transmission line; the biggest shortcoming is that the sand outlet is in a strand shape due to the sand feeding mode of the frequency converter and the motor, the sand concentration in the space is suddenly high and suddenly low and cannot be kept stable, so that the sand diffusion concentration around the power transmission line is extremely uneven, and the experimental result is greatly influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a novel wind-blown sand weather simulation test system which is low in cost, movable, continuous in sand production and long in diffusion distance.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a movable type concentration accurate controllable even sand-discharging sand blown by wind weather simulation experiment system which characterized in that: the sand precise and uniform sand feeding system comprises an air compressor, an air storage tank, a gas distribution bag, a plurality of electromagnetic valves, an electromagnetic valve remote control device and a Venturi tube, the sand precise and uniform sand feeding system comprises a storage hopper, a vibration device, a butterfly valve, a sand grain caching device with an opening at the upper end and a base, a compressed air outlet of the air compressor is connected with an air inlet of the air storage tank through a first pressure-resistant air tube, an air outlet of the air storage tank is connected with an air inlet of the gas distribution bag, the gas distribution bag is provided with a plurality of air outlet tubes, each air outlet tube is provided with an electromagnetic valve, a control end of each electromagnetic valve is connected with the electromagnetic valve remote control device through a cable, the electromagnetic valve remote control device is used for controlling the opening or closing of the air outlet tubes on the gas distribution bag, and one of the air outlet tubes is connected with one end, the base is located the support, vibrating device and storage funnel with base fixed connection, venturi passes sand grain memory device, just the tonifying qi hole on the venturi is located in the sand grain memory device, and with sand grain memory device's bottom plate sets up relatively, storage funnel's discharge gate extends to in sand grain memory device's the upper end opening, the butterfly valve set up in on storage funnel's the discharging pipe, be used for control opening or closing of discharging pipe.
The further technical scheme is as follows: and the gas storage tank is provided with a pressure gauge for displaying the gas pressure in the gas storage tank.
Preferably, the air compressor is a screw air compressor.
Preferably, the air supply holes are uniformly arranged along the radial direction of the Venturi tube.
Preferably, the number of the air supply holes is 6.
Preferably, the material storage port of the material storage hopper is positioned right above the air supply hole.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the experimental system has the advantages of small volume, large sand wind diffusion range, strong mobility and low equipment cost, can greatly expand the test range, and can perform open sand wind weather simulation experiments; the feeding of a screw motor is abandoned, the sand feeding amount is controlled by adopting a mode of a hopper and a vibration device, the sand outlet concentration is accurate and controllable, the continuity is excellent, the test precision is higher, and the obtained test data is accurate and reliable; the experimenter can keep away from the safety experiment of the pressure equipment by remotely controlling the electromagnetic valve switch through the control device.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a functional block diagram of a system according to an embodiment of the present invention;
wherein: 1. the air compressor comprises an air compressor, 201, a first pressure-resistant air pipe, 202, a second pressure-resistant air pipe, 3, an air storage tank, 4, a pressure gauge, 5, an air distribution bag, 6, an electromagnetic valve, 7, an electromagnetic valve remote control device, 8, a cable, 9, a vibration device, 10, a storage hopper, 11, a sand grain caching device, 12, a butterfly valve, 13, a venturi tube, 14, a base and 15, and a support.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, the embodiment of the invention discloses a movable sand wind weather simulation experiment system with accurate, controllable and uniform sand outlet concentration, which comprises a high-pressure air injection subsystem and an accurate and uniform sand supply system, wherein the high-pressure air injection subsystem comprises an air compressor 1, an air storage tank 3, an air distribution bag 5, a plurality of electromagnetic valves 6, an electromagnetic valve remote control device 7 and a venturi tube 13; the accurate and uniform sand feeding system comprises a storage hopper 10, a vibration device 9, a butterfly valve 12, a sand grain caching device 11 with an opening at the upper end and a base 14.
A compressed air outlet of the air compressor 1 is connected with an air inlet of the air storage tank 3 through a first pressure-resistant air pipe 201, and an air outlet of the air storage tank 3 is connected with an air inlet of the air distribution bag 5; divide gas bag 5 to set up a plurality of outlet duct, set up an solenoid valve 6 on every outlet duct, the control end of solenoid valve 6 pass through cable 8 with solenoid valve remote control device 7 is connected, solenoid valve remote control device 7 is used for opening or closed of outlet duct on the control divides gas bag 5, and one of them outlet duct is connected with venturi 13's one end through the withstand voltage air pipe 202 of second.
Base 14 is located support 15, vibrating device 9 and storage funnel 10 with 14 fixed connection of base, venturi 13 passes sand grain buffer 11, just the tonifying qi hole on the venturi is located in sand grain buffer 11, and with sand grain buffer 11's bottom plate sets up relatively, storage funnel 10's discharge gate extends to in sand grain buffer 11's the upper end opening, butterfly valve 12 set up in on storage funnel 10's the discharging pipe, be used for control opening or the closure of discharging pipe.
Air compressor 1 links to each other by the first withstand voltage air pipe of a small segment with gas holder 3, and gas holder 3 and venturi 13 link to each other by the withstand voltage air pipe of longer second, and the air is stored in the gas holder earlier through compressor compression, opens the solenoid valve jet-propelled when the gas holder internal pressure reaches the numerical value that the experiment required. The feeder is provided with a base, the sand storage hopper 10 is placed on the base 14, a sand caching device 11 is installed at a position, right opposite to a discharge port of the funnel, below the base 14 and used for fixing the Venturi tube 13, and a gas supplementing port of the Venturi tube 13 is just wrapped by the sand caching device 11, so that sand can be sucked into the Venturi tube 13 after leaking into the sand caching device 11 and mixed with air to be sprayed out.
The vibration device 9 is arranged at the bottom of the storage bin and is used for arch breaking and uniform feeding. The vibration device 9 is powered on, and the vibration motor starts to vibrate. The generated exciting force makes the lower body of the material storage hopper 10 generate strong vibration in the horizontal direction, the vibration decomposes the horizontal exciting force into a normal force and a tangential force through a conical surface, the normal force is transmitted to the deep part of the material in a radial shape, and the tangential force makes the material sheared, thereby eliminating the arching of the material in the bin and discharging the material from a discharge port like flowing water.
The experimental system has the advantages of small volume, large sand wind diffusion range, strong mobility and low equipment cost, can greatly expand the test range, and can perform open sand wind weather simulation experiments; the feeding of a screw motor is abandoned, the sand feeding amount is controlled by adopting a mode of a hopper and a vibration device, the sand outlet concentration is accurate and controllable, the continuity is excellent, the test precision is higher, and the obtained test data is accurate and reliable; the experimenter can keep away from the safety experiment of the pressure equipment by remotely controlling the electromagnetic valve switch through the control device.
Further, as shown in fig. 1, a pressure gauge 4 is disposed on the gas storage tank 3 for displaying the gas pressure in the gas storage tank to prevent the pressure in the gas storage tank 3 from being too high;
the outside of the expansion section of the Venturi tube 13 is not a general conical structure but a cylindrical tube with the caliber equivalent to that of the conical structure, 6 air supply holes are uniformly distributed in the radial direction of the cylindrical tube, and when the Venturi tube 13 is installed on the sand grain caching device 11, the upper part of the sand grain caching device is opened, so that the air supply holes are communicated with the atmosphere.
Claims (6)
1. The utility model provides a movable type concentration accurate controllable even sand-discharging sand blown by wind weather simulation experiment system which characterized in that: the sand precise and uniform sand feeding system comprises a high-pressure air injection subsystem and a precise and uniform sand feeding system, wherein the high-pressure air injection subsystem comprises an air compressor (1), a gas storage tank (3), a gas distribution bag (5), a plurality of electromagnetic valves (6), an electromagnetic valve remote control device (7) and a Venturi tube (13), the precise and uniform sand feeding system comprises a storage hopper (10), a vibration device (9), a butterfly valve (12), a sand grain caching device (11) with an opening at the upper end and a base (14), a compressed air outlet of the air compressor (1) is connected with an air inlet of the gas storage tank (3) through a first pressure-resistant air pipe (201), an air outlet of the gas storage tank (3) is connected with an air inlet of the gas distribution bag (5), the gas distribution bag (5) is provided with a plurality of gas outlet pipes, each gas outlet pipe is provided with one electromagnetic valve (6), and a control end of each electromagnetic valve (6) is connected, the electromagnetic valve remote control device (7) is used for controlling the opening or closing of an air outlet pipe on the air distribution bag (5), one of the air outlet pipes is connected with one end of the Venturi pipe (13) through a second pressure-resistant air pipe (202), the base (14) is positioned on the bracket (15), the vibration device (9) and the storage hopper (10) are fixedly connected with the base (14), the Venturi tube (13) penetrates through the sand grain caching device (11), and the air supply hole on the Venturi tube is positioned in the sand grain caching device (11), and is arranged opposite to the bottom plate of the sand grain caching device (11), the discharge hole of the storage hopper (10) extends into the upper end opening of the sand grain caching device (11), the butterfly valve (12) is arranged on the discharging pipe of the storage hopper (10) and used for controlling the discharging pipe to be opened or closed.
2. The mobile sand blown weather simulation experiment system of accurate and controllable uniform sand production of concentration according to claim 1, wherein: and the gas storage tank (3) is provided with a pressure gauge (4) for displaying the gas pressure in the gas storage tank.
3. The mobile sand blown weather simulation experiment system of accurate and controllable uniform sand production of concentration according to claim 1, wherein: the air compressor (1) is a screw air compressor.
4. The mobile sand blown weather simulation experiment system of accurate and controllable uniform sand production of concentration according to claim 1, wherein: the air supply holes are uniformly arranged along the radial direction of the Venturi tube (13).
5. The mobile sand blown weather simulation experiment system of accurate and controllable uniform sand production of concentration according to claim 4, wherein: the number of the air supply holes is 6.
6. The mobile sand blown weather simulation experiment system of accurate and controllable uniform sand production of concentration according to claim 1, wherein: the material storage port of the material storage hopper (10) is located right above the air supply hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711038114.5A CN107831420B (en) | 2017-10-30 | 2017-10-30 | Movable wind sand weather simulation experiment system with accurate and controllable concentration and uniform sand discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711038114.5A CN107831420B (en) | 2017-10-30 | 2017-10-30 | Movable wind sand weather simulation experiment system with accurate and controllable concentration and uniform sand discharge |
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| Publication Number | Publication Date |
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| CN107831420A CN107831420A (en) | 2018-03-23 |
| CN107831420B true CN107831420B (en) | 2019-12-31 |
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| CN113916766B (en) * | 2021-11-11 | 2023-08-04 | 中车长春轨道客车股份有限公司 | Device for testing wind and sand resistance of coating |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202305240U (en) * | 2011-11-04 | 2012-07-04 | 南车青岛四方机车车辆股份有限公司 | Wind sand environment simulation experiment table |
| CN203249748U (en) * | 2013-02-28 | 2013-10-23 | 山东大学 | Radiator wind tunnel used for engineering machinery and used for simulating sandstorm impact |
| CN104019965B (en) * | 2014-05-15 | 2016-09-07 | 中车青岛四方机车车辆股份有限公司 | Sand-proof method for testing performance and experimental rig |
| CN204575475U (en) * | 2015-03-09 | 2015-08-19 | 西南交通大学 | High and cold wind sand environment wheel-rail wear and tear analogue experiment installation |
| JP6516294B2 (en) * | 2015-11-24 | 2019-05-22 | 株式会社日立プラントメカニクス | Environmental wind tunnel test equipment |
| CN205538610U (en) * | 2016-05-04 | 2016-08-31 | 惠州出入境检验检疫局检验检疫综合技术中心 | A dust and sand feed arrangement for sand and dust test chamber |
| CN205898649U (en) * | 2016-08-24 | 2017-01-18 | 厦门双瑞船舶涂料有限公司 | Coating weatherability testing equipment |
| CN107101784A (en) * | 2017-06-12 | 2017-08-29 | 浙江工业大学 | Experimental rig for simulating the lip envelope of monitoring particulate matter intrusion rotation in real time under wind sand environment |
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