JP2014214012A - Feeding device of powder and granule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeding device of powders and granules capable of continuously achieving air pressure transportation while preventing the adherence and blowing up of the powders and granules in the device when a material to make the powders and granules is crushed and transported by air pressure.SOLUTION: A feeding device of powders and granules comprises: a rotary feeder 102 to feed a material to make the powders and granules downward; a pair of crushing drums 104A and 104B which are disposed so as to be separated with a predetermined gap mutually facing outer peripheral surfaces and which are rotatable in a direction from upward to a narrowest part 112; and a casing 106. In the feeding device of the powders and granules,: the casing 106 has an upper housing part, a lower housing part 118 and an intermediate housing part 120 so that a predetermined annular clearance 122 is formed between the outer peripheral surface of the rotary feeder 102 and the casing 106; an inflow opening to charge the material is disposed at the upper part of the upper housing part; and an outflow opening to outflow the powders and granules is disposed at the lower part of the lower housing part 118.

Description

  TECHNICAL FIELD The present invention relates to a powder supply device, and more specifically, when the material to be powdered supplied from above is crushed and sent downward as a powder particle, The present invention relates to an apparatus for supplying powder particles capable of preventing blow-up.

2. Description of the Related Art Conventionally, an environmental test room has been used for placing a complete model vehicle indoors, setting various natural environments and weather conditions, and collecting and analyzing loads on the vehicle as data.
As an example, we simulate snowstorms with artificial snow in an environmental test room, blow off the snowstorms toward the vehicle, and deal with problems such as problems caused by snow in the engine room and icing problems such as freezing of suspension parts. Things have been done.

For this reason, an environmental test room has a wind tunnel of a space enough for a vehicle to be arranged and blowing a snowstorm toward the vehicle, and a snowstorm generating device.
The snow blowing generator was simulated by an ice maker that produces flaky ice, an ice breaker that breaks the produced flaky ice into ice particles of a predetermined particle size, and ice particles of a predetermined particle size that are crushed ice It has a pressure feed pipe that conveys artificial snow into the wind tunnel, and a blowout nozzle that is installed at the tip of the pressure feed pipe and blows out toward the front of the vehicle.
According to such an environmental test room, it is possible to perform an environmental test simulating natural environment and weather conditions by blowing a snowstorm toward a vehicle in a wind tunnel using a snowstorm generator.

At this time, in order to perform an appropriate and effective environmental test, it is necessary to simulate a snowstorm in a natural state. In particular, from the viewpoint of reproducing the adhesion of the snowstorm to a vehicle, the temperature and particle size of the snow constituting the snowstorm Furthermore, it is important to secure the amount of snow necessary for the test.
On the other hand, in the wind tunnel where the vehicle is placed, there is a restriction that the distance between the vehicle and the air flow outlet is short (about 1 to 2 meters), and a natural snowstorm is simulated between these short distances, Need to spray on the vehicle.

Conventionally, as such an ice breaker, for example, as disclosed in Patent Document 1, a pair of crushing drums are disposed upward and a rotary feeder is disposed downward in a casing having an inlet at an upper portion and an outlet at a lower portion. The flake-shaped ice that is put into the casing from the inlet is crushed by a pair of crushing drums, crushed into ice and sent downward, and the rotary feeder is used for quantifying the ice and feeding it in a rotary manner. The ice particles discharged from the discharge port are pneumatically fed through the pressure feed pipe and blown out as a snowstorm from the blowout nozzle.
However, such an ice breaker has the following technical problems.
First, ice granulated by crushing adheres to the inner surface of the crusher, making it difficult to transport a desired amount of ice particles. More specifically, in the casing, an intermediate housing is provided between an upper housing part that accommodates a pair of crushing drums and a lower housing part that accommodates a rotary feeder. When the grain conveyance path is configured, the ice particles may adhere to the inner surface of the conveyance path, possibly blocking the conveyance path and making it difficult to feed the ice grains by the rotary feeder.
Secondly, especially in the case of pumping, when the granulated ice is pumped using an air stream, the air stream blows up back in the conveying path, and similarly, a desired amount of ice grains in the casing Conveyance becomes difficult, and pumping by an air current becomes intermittent, which makes it difficult to convey ice particles continuously. More specifically, since the air flow in the pressure feeding pipe is normally higher than that in the casing, it flows backward through the discharge port, and as a result, ice particles blow up or the ice particles are pumped through the discharge port. Supply to the piping becomes intermittent, and it becomes difficult to continuously supply snowstorm from the blowing nozzle. This makes it difficult to obtain accurate test data in the snow environment test.
The technical problem related to such variation in the distribution amount is not limited to the case where a large number of ice particles adhere to the inner surface of the conveyance path when ice is crushed and granulated in order to generate artificial snow for use in environmental tests. In various fields such as mixed feed, food manufacturing, pharmaceutical manufacturing, or mining, it is necessary to prepare and mix powder, and crush it while conveying the material to be granulated or pulverized from above to below. Therefore, it is a technical problem that can occur widely and generally when granulating or pulverizing.
JP 2003-160108 A

In view of the above technical problems, the object of the present invention is to adhere and blow up the granular material inside the apparatus when crushing the material to be granulated from above and sending it down as a granular material. Provided is a granular material supply device capable of preventing the above.
The object of the present invention is to crush the ice thrown from above when simulating a snowstorm in a snow environment test and send it downward as ice particles, and when the air is fed and blown out as a snowstorm, the adhesion of ice particles inside the device The present invention also provides a powder supply device that enables continuous pneumatic feeding of ice powder while preventing blow-up.

In order to achieve the above object, the powder and particle supply apparatus of the present invention comprises:
A rotary feeder in which the rotary shaft is arranged horizontally, and the material to be granulated, which is input from above, is quantified and supplied downward in a rotary manner;
A pair of crushing drums that are arranged at predetermined intervals with their outer peripheral surfaces facing each other so that the respective drum axes are parallel to each other and can be rotated from the upper side toward the narrowest part. In the space above the narrowest part between the pair of crushing drums, it is arranged below the rotary feeder so as to receive the material to be granulated supplied from the rotary feeder. A pair of crushing drums,
A casing having the rotary feeder and the pair of crushing drums provided therein;
The casing includes an upper housing portion that houses the rotary feeder and an outer periphery opposite to the narrowest portion of each of the pair of crushing drums so that a predetermined annular gap is formed between the casing and the outer peripheral surface of the rotary feeder. A lower housing part that houses the pair of crushing drums so as to form a predetermined gap between the upper surface and the upper housing part. The lower housing part is provided with an outflow opening through which the granular material flows out,
In the casing, between the rotary feeder and the pair of crushing drums, the granulated material after being crushed by the pair of crushing drums does not flow back into the casing from the outflow opening. The space pressure is set to be equal to or higher than the pressure in the lower housing.

According to the granular material supply apparatus having the above configuration, the material to be granulated, which is input from the inflow opening, is first quantified by the rotary feeder and is supplied downward in a rotary manner, via the intermediate housing part, While being received in the space above the narrowest part between the pair of crushing drums arranged below the rotary feeder, and passing through the narrowest part of the pair of crushing drums, it is crushed and granulated, It is sent downward and flows out from the outflow opening.
At this time, a predetermined annular gap is formed between the upper housing portion of the casing that stores the rotary feeder and the outer peripheral surface of the rotary feeder, while the lower housing portion of the casing that stores the pair of crushing drums and the pair of crushing A predetermined gap is formed between the narrowest part of each drum and the outer peripheral surface on the opposite side, and the rotary feeder and the pair of crushing drums can be rotated while the rotary feeder and the pair of crushing drums can be rotated in the casing. Rotation of the material prevents the material or the granular material to be pulverized from returning upward.
At the same time, a pair of crushing drums are arranged below the rotary feeder in the casing, and the pressure in the space between the rotary feeder and the pair of crushing drums is made equal to or higher than the pressure in the lower housing in the casing. By restricting the region in the casing where the material is granulated in the casing to a portion from the pair of crushing drums to the outflow opening, the air flow in the pressure feeding pipe is prevented from flowing back into the casing from the outflow opening. When the material to be pulverized is sent from the top to the bottom and crushed and pulverized, for example, the flow path between the pair of crushing drums and the rotary feeder is closed in the casing, Even if it becomes impossible to transport, the backflow from the outflow opening of the granular material, or the flow path is not blocked, the desired amount of granular material It is possible to transport of to prevent from or difficult.

Further, a pressure feeding pipe disposed below the pair of crushing drums may be further provided so as to communicate with the outflow opening, and the granular material may be pressure fed by an air flow in the pressure feeding pipe. .
Furthermore, it further includes a branch pipe that connects the space upstream of the outflow opening of the pressure feed pipe with the space, and the branch pipe is provided with a booster pump. The airflow sent into the space may be set to a higher pressure than the airflow flowing through the pressure feed pipe.
In addition, the branch pipe may be connected to a portion of the casing corresponding to the space so that the pressurized airflow is directed downward in the space.

Further, the material to be pulverized is ice, which is crushed by the pair of crushing drums to form ice-shaped artificial snow, and a blowing nozzle for blowing snow is provided at the downstream end of the pumping pipe. Good.
Further, the material to be pulverized may be continuously charged from the inflow opening, the granular material may be continuously pumped by the pumping pipe, and snowstorm may be continuously blown from the blowing nozzle.
Furthermore, the pair of crushing drums may include a high-speed crushing drum and a low-speed crushing drum.
In addition, a spiral sort roller may be further provided above the narrowest portion between the pair of crushing drums.

Further, the upper housing is in a cylindrical shape extending in the horizontal direction, and the lower housing is connected in such a manner that the cylinders extending in the horizontal direction are connected in a state where the distance between the centers is smaller than the sum of the respective radii. It may be configured.

An example of a case where artificial snow is generated using the ice particle supply device according to the present invention and a snow environment test is performed on a vehicle using the artificial snow is described below with reference to the drawings. The embodiment will be described in detail.
First, the snow environment test system will be described. As shown in FIG. 1, the snow environment test system 10 uses artificial snow composed of ice particles and simulates a snowstorm by placing the artificial snow on an airflow from behind. Thus, it is configured to spray toward the vehicle V, which is a test specimen, and for that purpose, it has a snowstorm supply system 12 and an airflow supply system 14.
In particular, when continuously blowing toward the vehicle V using the required amount of snowstorm with a predetermined snow quality, where the particle size and moisture content of ice particles are the main influencing factors, the entire height of the vehicle V In order to achieve a desired snowstorm concentration distribution in the height direction of the vehicle V in some cases, a group of ice particles used as artificial snow is manufactured immediately before the test under a predetermined temperature and humidity control. And prompt supply is required.

More specifically, the snow environment test system 10 includes a wind tunnel 16 in which the vehicle V to be tested is disposed, a low temperature chamber 18 disposed above the wind tunnel 16, and an ice making chamber disposed above the low temperature chamber 18. 20, an ice making machine 22 is arranged in the ice making chamber 20, and an ice temperature stabilizing conveyor 24, an ice breaker 26, a blower 28, a cooler 30, and artificial snow distribution are arranged in the low temperature chamber 18. A device 34 is disposed, and a wet snow device 32, an artificial snow blowing nozzle 36, and a snow collecting device 38 are disposed in the wind tunnel 16. In general, ice produced in the ice making chamber 20 is cooled to a low temperature chamber. Artificial snow is produced by breaking the ice at 18 and making it into ice particles. The artificial snow is pumped toward the wind tunnel 16, and the artificial snow that has become wet snow is distributed in the wind tunnel 16 and placed in a low temperature air current. It is configured to blow into the vehicle V and blow toward the vehicle V. There.

The wind tunnel 16 is an open type circulation type, and a measurement chamber 300 in which a vehicle to be measured is installed (open type), and first to fourth bent cylinders 302, 304, 306, 308 (bent portions). Are formed in a substantially rectangular shape in plan view. The air flow generated by the blower 25 passes through the second diffusion cylinder 310, the third bending cylinder 306, the fourth bending cylinder 308, the rectifying cylinder 312 (see FIG. 2), and the contracted flow cylinder 314 (see FIG. 2), and the measurement chamber 300. The air flows into the measurement chamber 300 from the blowout port 316 (see FIG. 2), and flows through the first bending cylinder 302 and the second bending cylinder 304 in this order.
The airflow blown by the blower 25 is measured by once reducing the wind speed (dynamic pressure) of the entire airflow and increasing the pressure (static pressure) in the intermediate body portion, and then passing through the contracted flow drum 314. Therefore, an air flow having a necessary and sufficient air volume (wind speed) can be blown out from the blow-out port 316 to the measurement chamber 300.

As a result, as will be described later, the ice particles that are conveyed by air through the ice making process, the ice breaking process, the separation process, and the wet snow process are blown into the measurement chamber 300 by riding on the airflow from the back toward the vehicle. By adjusting the wind speed of the airflow with the blower 25, the traveling vehicle can be simulated while being a stationary vehicle.
Further, in the case of the circulating wind tunnel 16 for a snowstorm test, a snow repair device 38 is separately provided downstream of the vehicle V in order to separate and collect the snow after the test. In order to separate snow by the inertia effect, an area where the airflow is not rectified is provided downstream of the vehicle V.

The snow blowing supply system 12 is provided in three systems. In each system, a snow supply pipe 40 that connects the ice breaker 26 and the blowing nozzle 36 and an air duct 44 that connects the suction port 42 in the wind tunnel 16 and the ice breaker 26 are provided. In the snow supply pipe 40, an artificial snow distribution device 34 and a wet snow device 32 are connected in this order between the ice breaker 26 and the blowing nozzle 36, while the air duct 44 has an inside of the wind tunnel 16. A blower 28 and a cooler 30 are connected between the suction port 42 and the ice breaker 26.
The artificial snow distribution device 34 is installed on the upstream side of the wet snow device 32. If the artificial snow distribution device 34 is installed on the downstream side, the wet snow is sent to the distribution device 34, and the inside of the distribution device 34 This is to prevent clogging due to adhesion.

The ice making machine 22 is a so-called reamer type ice making machine 22 that produces flaky ice, and among the plurality of ice making machines 22 that produce cracked ice according to the total required amount of artificial snow used in the snow environment test. The ice making amount is roughly adjusted by making ice with the selected ice making machine 22 according to the change in the required amount of artificial snow used for the environmental test. The evaporation temperature and / or the water temperature and / or the reamer rotation speed are adjusted in each selected ice making machine 22 according to the difference between the required amount of artificial snow and the roughly adjusted ice making amount in response to the change in the amount. Thus, a control device (not shown) for finely adjusting the ice making amount is provided.

The ice crusher 26 mainly includes a rotary feeder (not shown) arranged at the upper part and a pair of crushing drums (not shown) arranged at the lower part, and is supplied by the ice temperature stabilizing conveyor 24. Ice is quantified by a rotary feeder, supplied to a pair of crushing drums, crushed by a pair of crushing drums, and supplied to the snow supply pipe 40 as ice particles having a predetermined particle diameter.

The artificial snow distribution device 34 is used to distribute the artificial snow conveyed by the snow supply pipe 40 to a plurality of branch pipes (not shown). More specifically, the blowing nozzle 36 at the same level is used for the vehicle. The snow supply pipes 40 in each system are branched into a plurality of branch pipes in the width direction of the vehicle V so that a plurality of the snow supply pipes 40 are provided in the width direction of the vehicle V. A blowing nozzle 36 is provided at the tip of the nozzle.

The artificial snow distribution device 34 includes a rotating body (not shown) in which an upstream end face and a downstream end face are respectively arranged in parallel with a downstream end face of the snow supply pipe 40 and an upstream end face of each of the plurality of branch pipes; A rotation drive unit (not shown) that rotates the rotating body at a predetermined rotation speed about its axial direction, and the rotating body has a pressure feed passage (not shown) penetrating the rotating body in the axial direction inside thereof. ), And the pressure-feed passage is disposed on the upstream end face in a non-contact manner in close proximity to an outflow opening (not shown) provided on the downstream end face of the snow supply pipe 40 (not shown). And a discharge port (not shown) arranged in a non-contact manner in close proximity to an inflow opening (not shown) provided on the upstream end surface of each of the plurality of branch pipes. Equipped with a plurality of branch pipes on the passage trajectory of the discharge port by rotation of the rotating body Inlet openings respectively are provided so as to be located.

The wet snow device 32 has a hot air supply pipe (not shown) communicating with the snow supply pipe 40, and the hot air supply pipe has a predetermined length in the extending direction of the snow supply pipe 40 at the downstream end thereof. A hot air inflow portion (not shown) that forms an annular space that covers the entire outer peripheral surface of the snow supply pipe 40, and the hot air inflow opening (not shown) is provided on the outer peripheral surface of the snow supply pipe 40 that is covered by the annular space. )) Are uniformly provided, whereby an aging space (heat exchange aging region) is formed in the snow supply pipe 40 on the downstream side of the portion where the hot air inflow portion of the snow supply pipe 40 is attached. It is designed to be wet and snowy.

Regarding the airflow supply system 14, the wind tunnel 16 is formed in a part of the circulation space, and is configured to blow snowstorm over the vehicle height of the vehicle V in one direction from the front to the rear of the vehicle V. Specifically, an air flow having a predetermined wind speed is generated in one direction from the front to the rear of the vehicle V by the blower 25 installed in the circulation space, and the air flow passes through the vehicle V to a predetermined temperature by the cooler 30. It is cooled and returned to the blower 25 to generate airflow again and repeat this.

With regard to the blowing device, the three blowing nozzles 36 for blowing snow 36 are arranged at a predetermined distance in front of the vehicle V at a predetermined distance in the height direction over the vehicle height of the vehicle V. The concentration of the snowstorm to be supplied can be adjusted for each blowing nozzle 36. A snow collecting device 38 is arranged at a predetermined distance behind the vehicle V, and the snowstorm that has passed through the snow collecting device 38 is blower arranged in the low temperature chamber 18 through the suction port 42 in the wind tunnel 16. 28, cooled by the cooler 30, returned to the ice breaker 26, iced by the ice making machine 22, supplied to the ice breaker 26 by the ice temperature stabilizing conveyor 24, mixed with the ice particles to be crushed, and supplied again with snow. It is used for blowing snow from the blowing nozzle 36 through the tube 40. The blowout nozzle 36 is arranged along the direction of airflow, and the blowout port 102 is installed in the zone of the airflow blown from the blower 25.
In this regard, snow blowing is performed when the snow blown out from each blowing nozzle 36 by the air blown by the blower 28 is blown toward the vehicle V on the air flow blown out from the blower 25. As long as snow clogging in the tube 40 does not occur, the speed is preferably as low as possible, and the speed of snow blowing is preferably simulated by the airflow blown from the blower 25.
More specifically, when the blizzard is diffused by the diffusion plate 74 (described later) and blown toward the vehicle V, if the pumping speed of the pumped air is high, the speed of the blizzard increases only in the blizzard of the blowing nozzle 36 portion. In addition, while deviating from the natural snowstorm, it is possible to change the speed of the entire diffused snowstorm uniformly by changing the speed of the airflow blown from the blower 25. When simulating the above, it is advantageous to vary the speed of the airflow blown from the blower 25.

As shown in FIG. 2, a diffusion plate 74 is provided in front of each blowing nozzle 36, and the snowstorm blown out from the blowing nozzle 36 on the low temperature airflow from the blower toward the vehicle V is shown in FIG. 3. In this way, it hits the diffusion plate 74 and diffuses outward in all directions, and the three blowing snow blowout nozzles 36 cooperate with each other, so that the snowstorm occurs in the front part of the vehicle V over the height direction of the vehicle V. To be distributed.
In this respect, since the wind tunnel 16 is not a so-called aerodynamic wind tunnel 16 but a simple wind tunnel 16, the distance between the blowing nozzle 36 and the front portion of the vehicle V is about 1 to 3 meters. The snowstorm blown out from the blowout nozzle 36 over a short distance is diffused over the entire height at the front portion of the vehicle V.
A plurality of air outlets 102 are provided at intervals in the height direction so as to cover the entire height of the vehicle V, and the amount of snow blown out from each air outlet 102 can be adjusted independently of each other. According to the height of the vehicle V, the concentration distribution of the snowstorm can be adjusted.

The crushing device 26 that constitutes the powder supply device will be described. The powder supply device 26 includes a rotary feeder 102, a pair of crushing drums 104 disposed below the rotary feeder 102, and the rotary feeder 102. And a pair of crushing drums 104 provided inside, and a pressure feed pipe 107 disposed below the pair of crushing drums 104, and the pressure feed pipe 107 is connected to the snow supply pipe 40. Has been.

The rotary feeder 102 is a conventionally known type, and detailed description thereof is omitted. However, the rotary shaft 108 is disposed horizontally, and the material to be granulated that is input from above is quantified and supplied downward in a rotary manner. Configured as follows.
More specifically, the rotary feeder 102 rotates between the blades adjacent to the powder particles falling from the hopper or the like when the rotor in which the plurality of rotary blades 110 are radially arranged rotates in the casing 106. However, it is dropped from the lower outflow opening 113. More specifically, in the rotor, a plurality of rotating blades 110 are arranged radially around a rotary shaft 108 supported via a casing 106, and powder particles are packed between adjacent rotating blades 110. For example, the rotary shaft 108 is driven by a drive motor (not shown).

The pair of crushing drums 104 includes a high-speed crushing drum 104A and a low-speed crushing drum 104B. The crushing drums 104 are arranged in a predetermined manner with their outer peripheral surfaces facing each other so that the drum axes are horizontal and parallel to each other. It arrange | positions at intervals and is made to be able to rotate in the direction which goes to the narrowest part 112 from upper direction, respectively. The pair of crushing drums 104 are arranged in the space above the narrowest part 112 between the pair of crushing drums 104 so that the material to be granulated supplied from the rotary feeder 102 can be received. It is arranged below.
Furthermore, between the pair of crushing drums 104, a spiral sort roller (not shown) is provided above the narrowest part 112, so that a space above the narrowest part 112 between the pair of crushing drums 104 is provided. The ice that is received by the pair is distributed in the drum axial direction of the pair of crushing drums 104.

The ice breaker is a conventionally known type, and the ice is crushed by both drums to make artificial snow. A pair of drums provided in the ice breaker casing has a triangular pyramid on the outer periphery of each drum. A plurality of rows of protruding teeth formed in the circumferential direction are formed over the entire rotation axis direction of the drum. Each drum is rotated in the opposite direction by, for example, a drive motor (not shown), and ice dropped between the drums is crushed at the narrowest portion to form artificial snow.
The projecting teeth are formed on the outer peripheral surface of the drum such that the bottom surface of the triangular pyramid forms an isosceles triangle, the isosceles side of the long side is in the drum circumferential direction, and the short side is perpendicular to the circumferential direction of the drum. ing. In particular, the triangular cutting surface formed by the short side and the apex of the triangular pyramid is preferably formed on the outer peripheral surface of the drum by retreating, for example, about 6 ° with respect to the rotation direction.
These triangular pyramid-shaped projecting teeth are continuously arranged on the outer peripheral surface of the drum to form a projecting tooth row. In one crushing drum, a plurality of projecting tooth rows are spaced apart from each other by several mm in the rotation axis direction of the drum. A pair of feed drums formed in a row and having the same structure form a pair, and by rotating synchronously in opposite directions, the flaky ice is crushed to generate artificial snow. The size of the artificial snow, that is, the size of the ice particles formed by crushed ice is adjusted by adjusting the clearance α between the two drums.

The casing 106 includes an upper housing portion 116, a lower housing portion 118, and an intermediate housing portion 120 that connects both housing portions. The upper housing portion 116 has a cylindrical shape extending in the horizontal direction, and the lower housing portion 118 is formed by connecting the cylinders extending in the horizontal direction with the distance between the centers being smaller than the sum of the respective radii. The intermediate housing part 120 is configured to extend vertically between the lower opening of the cylindrical part of the upper housing part 116 and the upper opening of the twin-shaped cylindrical part of the lower housing part 118.
The upper housing part 116 accommodates the rotary feeder 102 so as to form a predetermined annular gap 122 between the outer peripheral surface of the rotary feeder 102 and the lower housing part 118 is the narrowest part 112 of each of the pair of crushing drums 104. The pair of crushing drums 104 are accommodated so as to form a predetermined gap between the outer peripheral surface and the outer peripheral surface, and the intermediate housing part 120 is disposed between the upper housing part 116 and the lower housing part 118. The supplied material to be granulated is guided downward.

In the upper part of the upper housing part 116, an inflow opening 115 for introducing the material to be granulated is provided, and in the lower part of the lower housing part 118, an outflow opening 113 for outflowing the granular material is provided.
The pressure feeding pipe 107 is disposed below the pair of crushing drums 104 so as to communicate with the outflow opening 113, and the granular material is pressure fed by the airflow in the pressure feeding pipe 107.
The material to be pulverized is ice, which is crushed by a pair of crushing drums 104 to form ice-shaped artificial snow, and a blowing nozzle 36 for blowing snow is provided at the downstream end of the pressure feeding tube 107, so The ice to be converted is continuously introduced from the inflow opening 115, and the ice particles as powder are continuously pumped by the pressure feeding pipe 107 and distributed by the distribution device 34. The distributed ice particles are the wet snow device. 32 is wet snow having a predetermined moisture content, and the blowing snow is continuously blown out from the blowing nozzle 36.
The pressure in the intermediate housing portion 120 is higher than the pressure in the lower housing portion 118 so that the crushed ice particles do not flow back upward due to the airflow in the pressure feeding tube 107 flowing back into the casing 106 from the outflow opening 113. And so on. As a configuration for that purpose, it further has a branch pipe 122 that connects the upstream side portion of the pressure feed pipe 107 with respect to the outflow opening 113 and the intermediate housing portion 120 so that they can communicate with each other. Thereby, the airflow sent into the intermediate housing part 120 by the branch pipe 122 is set to a higher pressure than the airflow flowing through the pressure feed pipe 107.
In FIG. 2, the air flow P <b> 2 flowing in the B direction passes through the rotary feeder 102 from the intermediate housing part 120 having the high-pressure gas inlet 131 and tries to flow backward from the inflow opening 115, but is formed by an ice breaker in the air flow. Since it does not contain artificial snow, it does not cause problems even if it flows backward. When such a flow in the B direction is not generated as much as possible and the main flow is a flow in the lower direction in the A direction, the branch pipe 122 is disposed in the intermediate housing so that the pressurized airflow is directed downward in the intermediate housing portion 120. What is necessary is just to connect with respect to the part 120. FIG.
From the viewpoint of preventing the upward flow of ice particles after crushing, it is sufficient that the pressure in the intermediate housing portion 120 is equal to or higher than the pressure in the lower housing portion 118. There is no need to provide it.

The effect | action by the supply apparatus 100 of the granular material which has the above structure is demonstrated below.
First, in each system, the ice made by the ice making machine 122 is conveyed to the inflow opening 115 of the supply device 26 by the ice temperature stabilization conveyor 24.
Next, the ice, which is the material to be pulverized, introduced from the inflow opening 115 is first quantified by the rotary feeder 102 and supplied downward in a rotary manner, and disposed below the rotary feeder 102 via the intermediate housing portion 120. Is received in the space above the narrowest portion 112 between the pair of crushing drums 104, and when passing through the narrowest portion 112 of the pair of crushing drums 104, it is crushed and pulverized into ice particles. At the same time, it is sent downward and flows out from the outflow opening 113.
At this time, a predetermined annular gap 122 is formed between the upper housing portion 116 of the casing 106 that stores the rotary feeder 102 and the outer peripheral surface of the rotary feeder 102, and the lower portion of the casing 106 that stores the pair of crushing drums 104. A predetermined gap is formed between the housing portion 118 and the outer peripheral surface opposite to the narrowest portion 112 of each of the pair of crushing drums 104, and the rotary feeder 102 and the pair of crushing drums 104 are placed in the casing 106. While being able to rotate, rotation of the rotary feeder 102 and the pair of crushing drums 104 suppresses the material or powder particles to be powdered from returning upward.

At the same time, a pair of crushing drums 104 is arranged below the rotary feeder 102 in the casing 106, and the pressure in the space between the rotary feeder 102 and the pair of crushing drums 104 in the casing 106 is higher than the pressure in the lower housing. By setting the pressure to the same pressure or more, the region in the casing 106 where the material is pulverized in the casing 106 is limited to a portion from the pair of crushing drums 104 to the outflow opening 113, and the airflow in the pressure feed pipe 107 flows out. It is possible to prevent backflow from flowing into the casing 106 from the opening 113. When the material to be pulverized is sent from the upper side to the lower side through the intermediate housing part 120 and crushed to be pulverized, the intermediate housing part Since the material passing through 120 is not yet granulated, the intermediate housing part 1 It is possible to prevent adhesion of the granular material to the inner surface of 0, thereby blocking the flow path in the intermediate housing part 120 due to the adhesion of the granular material, making it impossible to convey the granular material. Even if the flow path is not blocked, it is possible to prevent the conveyance of a desired amount of powder particles from becoming difficult.
As described above, in each system, the ice made by the ice making machine 122 is crushed by the ice breaker 26 to become ice particles having a predetermined particle diameter, and is pumped by the air current through the snow supply pipe 40 and distributed by the distribution device 34. Thereafter, wet snow having a predetermined water content is made by the wet snow device 32, and is further pumped by an air flow toward the vehicle V as a test body by the snow supply pipe 40.
More specifically, in each system, the wet snow distributed from the blowing nozzle 36 at the tip of each branch pipe 58 is blown out, and is blown toward the vehicle by blowing air from behind the blowing nozzle 36.
In this way, when simulating a snowstorm in the snow environment test, the ice thrown from above is crushed and sent downward as ice particles, and when fed pneumatically and blown out as snowstorm, the adhesion of ice particles inside the supply device and It is possible to continuously feed the ice powder while preventing the blow-up.
In addition, as a modification, as shown in FIG. 1, without providing three systems of snowstorm supply system 12, as shown in FIG. It may be provided.
The embodiments of the present invention have been described in detail above, but various modifications or changes can be made by those skilled in the art without departing from the scope of the present invention.
For example, in this embodiment, between the upper housing part and the lower housing part, the material to be granulated supplied from the rotary feeder is directed downward toward the space above the narrowest part between the pair of crushing drums. Although described as having an intermediate housing portion for guiding, the rotary feeder is arranged in the casing and the pair of crushing drums are arranged in the casing and the rotary feeder and the pair of crushing drums are not limited thereto. As long as the pressure in the space is equal to or higher than the pressure in the lower housing, the area crushed or granulated in the casing is limited, and backflow from the outflow opening of the lower housing can be prevented. Such an intermediate housing part may be omitted.
For example, in the present embodiment, the ice particles crushed by the powder supply device have been described as being pumped using carrier air. However, the present invention is not limited to this, and the material to be granulated that is input from above is used. When crushing and sending it as powder, the rotary feeder is placed in the upper part of the casing and the pair of crushing drums are arranged in the lower part. May be.
For example, in the present embodiment, the case where ice is used as a material to be pulverized, the ice is crushed and pumped as ice particles, and used to simulate a snowstorm in an environmental test system is described, but the present invention is not limited thereto. Any material can be used as long as the material can be clogged without clogging in the housing by supplying the powder.

1 is an overall schematic diagram of an environmental test system in which a granular material supply device according to an embodiment of the present invention is disposed. It is a figure which shows the inside of the supply apparatus of the granular material which concerns on embodiment of this invention. It is another figure of the environmental test system which arrange | positions the supply apparatus of the granular material which concerns on embodiment of this invention.

V Vehicle 10 Snow environment test system 12 Snow blowing supply system 14 Air flow supply system 16 Wind tunnel 18 Low greenhouse 20 Ice making room 22 Ice making machine 24 Ice temperature stabilization conveyor 26 Ice breaker 28 Blower 30 Cooler 32 Wet snow device 34 Distributing device 36 Outlet nozzle 38 Snow Blow Collection Device 40 Snow Supply Pipe 42 Suction Port 44 Air Duct 100 Powder Body Supply Device 102 Rotary Feeder 104 Pair of Crushing Drum 106 Casing 107 Pressure Feeding Pipe 108 Rotary Shaft 112 Narrowest Part 113 Outlet Opening 115 Inlet Opening 116 Upper Part Housing portion 118 Lower housing portion 120 Intermediate housing portion 122 Annular gap 131 High-pressure gas inlet 300 Measurement chamber 302 First bending cylinder 304 Second bending cylinder 306 Third bending cylinder 308 Fourth bending cylinder 310 Second diffusion cylinder 312 Rectification cylinder 314 Reduced flow drum 316 Mouth out can

Claims (9)

A rotary feeder in which the rotary shaft is arranged horizontally, and the material to be granulated, which is input from above, is quantified and supplied downward in a rotary manner;
A pair of crushing drums that are arranged at predetermined intervals with their outer peripheral surfaces facing each other so that the respective drum axes are parallel to each other and can be rotated from the upper side toward the narrowest part. In the space above the narrowest part between the pair of crushing drums, it is arranged below the rotary feeder so as to receive the material to be granulated supplied from the rotary feeder. A pair of crushing drums,
A casing having the rotary feeder and the pair of crushing drums provided therein;
The casing includes an upper housing portion that houses the rotary feeder and an outer periphery opposite to the narrowest portion of each of the pair of crushing drums so that a predetermined annular gap is formed between the casing and the outer peripheral surface of the rotary feeder. A lower housing part that houses the pair of crushing drums so as to form a predetermined gap between the upper surface and the upper housing part. The lower housing part is provided with an outflow opening through which the granular material flows out,
In the casing, between the rotary feeder and the pair of crushing drums, the granulated material after being crushed by the pair of crushing drums does not flow back into the casing from the outflow opening. The pressure in the space is equal to or higher than the pressure in the lower housing,
An apparatus for supplying granular material. Further, a pressure feeding pipe disposed below the pair of crushing drums is provided so as to communicate with the outflow opening, and the granular material is pumped by an air flow in the pressure feeding pipe. The granular material supply apparatus according to 1.       A branch pipe that connects the space upstream of the outflow opening of the pressure feed pipe and the space is further connected, and the branch pipe is provided with a booster pump, whereby the branch pipe enters the space. The powder and granular material supply device according to claim 2, wherein the airflow to be sent is set to a pressure higher than that of the airflow flowing in the pressure feed pipe. The granular material supply apparatus according to claim 3, wherein the branch pipe is connected to a portion of the casing corresponding to the space such that the pressurized airflow is directed downward in the space. The material to be pulverized is ice, crushed by the pair of crushing drums to form ice-shaped artificial snow, and a blowing nozzle for blowing snow is provided at the downstream end of the pressure feeding pipe. Alternatively, the powder and granule supply apparatus according to 4. The material to be pulverized is continuously fed from the inflow opening, the granular material is continuously pumped by the pumping pipe, and snowstorm is continuously blown out from the blowing nozzle. Powder and particle feeder. The pair of crushing drums according to claim 1, wherein the crushing drum includes a high-speed crushing drum and a low-speed crushing drum. Furthermore, the supply apparatus of the granular material of Claim 1 with which a spiral type distribution roller is provided above the narrowest part between the pair of crushing drums. The upper housing has a cylindrical shape extending in the horizontal direction, and the lower housing is configured by connecting the cylinders extending in the horizontal direction in a state where the distance between the centers is smaller than the sum of the respective radii. The granular material supply apparatus according to claim 1.

Images