JPH0741988B2 - Injector for pneumatic feeding of powder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an injector for air-feeding powdery particles in an air conveyor device.

(Prior Art) Conventionally, in an air conveyor device, a hopper or tank at the base end and a storage tank at a remote place or a tank for the next process are connected by a long feeding pipe. Issue Bulletin, Jitsuko Sho 4
As shown in 6-34532, 37-6839, etc., an air supply pipe or a blower arranged at the base end, or an air supply pipe or a blower provided in the middle of the supply pipe, etc. We deal with smooth air feeding of various kinds of goods.

At that time, in order to feed various conveyed items more efficiently,
B. In the case of the carrying device shown in Japanese Patent Publication No. 49-5409,
An air supply pipe to the air chamber formed at the outer peripheral portion of the base end of the inlet side inner pipe,
In addition, the outer pipe is exposed to the outer circumference of the tip, and the compressed air is ejected from the ejection hole in the gap of the air chamber toward the outer pipe on the outlet side to cope with the conveyance of the fresh concrete.

Further, in the case of the air transportation device shown in JP-B-49-36317, a transportation pipe injector is formed on the outer periphery of the end portion of the suction pipe, the transportation pipe is joined to the outlet side of the injector, and the pressure blower is used. The compressed air sent to the injector is jetted from the gap between the distal end of the suction pipe and the injector toward the transport pipe side to cope with smooth suction conveyance of the lightweight container body.

Also, in the case of the object transporting device shown in C, Japanese Patent Publication No. 58-49449, a funnel-shaped outer tube is formed on the outer periphery of the front guide tube, and the air introduced from the air introducing section at the lower rear is guided to the tip of the guide tube. A smooth transfer of empty pipes is dealt with by ejecting the air toward the transport pipe from the gap between the section and the funnel-shaped outer pipe.

Further, in the case of the suction pressure feeding device shown in Japanese Patent Publication No. 59-4328, an air chamber is formed outside the supply pipe, and the pressure feeding air supplied from the blower to the air chamber and the gap around the outer periphery of the tip of the supply pipe are used. By ejecting to the taper pipe on the downstream side, suction pressure feeding of bottles is dealt with.

(Problems to be Solved by the Invention) However, in the case of such a conventional device, in each case, various conveyed objects are laterally conveyed by mere jet air, and the feeding ability thereof is mainly that of the blower. It usually depends on the capacity. Therefore, rather than making the adoption of a large-capacity blower the primary idea, it is not necessary to use a large-capacity blower for air supply of powder and granules, which can cope with a dramatic improvement in the supply capacity by improving the injector itself that ejects compressed air. An injector was desired.

(Means for Solving the Problems) Therefore, in the present invention, the idea is different from that of the conventional device of this kind, and the granular material having a structure peculiar to the suction port of the feeding pipe or the required point of the feeding pipe is provided. The air supply injector is connected, and the venturi function by the injector, the swirl air supply function by the swirl force of the compressed air, and the swirling air flow formed by the swirl guide vanes with a relatively large swirling pitch This is to deal with the improvement of the feeding ability for granules.

A first embodiment and a second embodiment of an air feeding injector I having a joint structure according to the present invention will be described below with reference to the accompanying drawings.

(Embodiment 1) First, in FIGS. 1 (a) and (b) showing a first embodiment of the present invention, reference numeral 1 denotes a bottomed outer cylinder having a conical cross-section with an upper portion having a small diameter and a lower portion having a large diameter bottomed portion. The connecting pipe 2 for supplying the compressed air X is eccentrically formed at the lower part of one side thereof. Reference numeral 3 denotes a tapered tube having a conical cross section with a small diameter in the upper portion and a large diameter in the lower portion, which is formed at the center position of the lower half portion of the bottomed outer cylinder 1. 4 is an opening throat part of the small diameter part at the upper end of the tapered tube 3
Is an inlet pipe for sucking the powdery particles Y, and is joined and fixed to the outlet side of the inlet pipe 5 and the large-diameter portion 3A on the inlet side of the tapered pipe 3, and is attached to the lower end inlet side of the inlet pipe 5. Forming the flange 5A. Reference numeral 7 is a cylindrical outlet pipe joined and fixed to the outlet side small diameter portion 1A of the bottomed outer cylinder 1, and a mounting flange 7A is provided on the upper end portion thereof. Reference numeral 8 denotes a bottom plate portion of the bottomed outer cylinder 1, which is joined and fixed to the outer peripheral surface of the large diameter portion 3A of the tapered tube 3.

Incidentally, U is an air supply passage for the compressed air X formed between the tapered pipe 3 and the bottomed outer cylinder 1, and the compressed air X swirling into the air supply passage U swirls in the air supply passage U. Rising up,
The air is swirling and rising from the outer circumference of the throat portion 4 of the tapered tube 3 toward the inner circumference surface of the bottomed outer cylinder 1 on the outlet side.

(Example 2) Next, in FIGS. 2A and 2B showing a second example,
Reference numeral 9 denotes a swirl guide vane for the compressed air X, and the swirl guide vane 9 twisted in a comparatively gentle spiral gradient divides the air supply passage U into a plurality of chambers in the radial direction.

In this case, the compressed air X introduced from the air supply connecting pipe 2
Is swirled in and then swung by the swirl guide blades 9 having a relatively gentle spiral gradient in the air supply passage U, and at a relatively large swivel pitch from the outer periphery of the throat portion 4 of the tapered tube 3 toward the outlet side. Gush out.

(Example 1 of use) Of the injectors I for air feeding of the powdery particles Y shown in the above-mentioned first and second examples, the injector I of the second example is used.
In FIG. 3 showing the case where the above is configured as an air conveyor device, 10 is a hopper or a tank portion arranged at the base end portion of the air conveyor device, and stores or accumulates the granular material Y as appropriate. Reference numeral 11 is a feed pipe for the powdery or granular material Y which is appropriately arranged in the vertical and horizontal directions, and the air feed injector I is arranged at the base end portion or a proper place of the feed pipe 11 and the end portion thereof is provided. The mounting flanges 5A and 7A are fixedly connected to the feed pipe 11. 12 is a discharge chute arranged at the end of the feed pipe 11, 13 is an air pressure generator such as a compressor or a blower, and one or more air feed pipes 15 are branched and tangent to its discharge port 14 The end portion is connected to the mounting flange 2B of the air supply connecting pipe 2 of the air feeding injector I.

(Operation) When the air pressure generator 13 is actuated, the pressurized air X is swirled and introduced from the connection port 2A of the connection pipe 2 through the air supply pipe 15 in the tangential direction of the inner wall of the lower portion of the air supply passage U. While being swirled and guided by the swirl guide vanes 9 having a relatively gentle spiral gradient in the air supply passage U, the gas is ejected from the outer periphery of the throat portion 4 of the tapered tube 3 toward the outlet side at a relatively large swirl pitch.

Due to the swirling force of the compressed air X, a negative pressure is formed from the vicinity of the throat portion 4 of the taper pipe 3 to the lower inner peripheral surface, whereby the powder Y on the introduction side is sucked into the injector I, and the injector From the feeding passage T formed at the center position of I, it turns toward the feeding pipe 11 on the outlet side and is fed out. In addition, the compressed air X is also supplied to the air-injection injector I portion of this kind arranged in the middle of the supply pipe 11, so that the swirling and feeding force for the powdery particles Y is appropriately supplemented. Or, after being augmented, it is finally discharged from the discharge chute 12 to the outside.

(Use Example 2) In the above case, the case where the air feeding injector I is configured by piping in the air conveyor device has been described, but this is bypassed for the residual powdery particles Y in the bucket elevator as shown in FIG. It can also be applied to a feeding device.

In FIG. 4, H is a conveyor housing, which comprises an ascending passage 16 and a descending passage 17. Reference numeral 18 is a hopper for charging the powdery particles Y, which is formed in the lower portion of the housing H on the rising passage 16 side. A discharge chute 19 is formed on the lower passage 17 side of the upper end of the housing H. B is a bucket conveyor in which a large number of buckets 21 are attached to an endless belt 20 (or a chain), and upper and lower end portions thereof are suspended and supported by flat pulleys 22 and 23 provided at upper and lower end portions of a housing H. There is. Reference numeral 24 is a drive motor for the bucket conveyor B, which is installed and fixed to the motor base 25 at the upper end of the housing H. 26 is a drive pulley fixed to the rotary shaft of the drive motor 24, 27 is a driven pulley fixed to the rotary shaft of the flat pulley 22 on the upper side, and 28 is a belt suspended and supported between the drive pulley 26 and the driven pulley 27. is there.

Next, the bypass feeding device for the granular material Y remaining in the bucket elevator as described above will be described. 29 is an arcuate tank bottom of the housing H, 30 is a suction port for the residual powder granules Y formed in the tank bottom 29, and 31 is residual powder for connecting and connecting the suction port 30 and the mounting flange 5A at the lower end of the injector I. The bypass feed pipe of the granular body Y, 32 is a bypass feed pipe whose one end is connected and connected to the mounting flange 7A at the upper end of the injector I, and the other ends 32A and 32B are made to face the discharge chute 19 at the upper end of the housing H. Alternatively, the bucket 21 in the ascending passage 16 is provided so that the residual powdery granules Y can be charged.

The air supply pipe 15 connects between the mounting flange 2B of the air supply connection pipe 2 and the discharge port 14 of the air pressure generator 13.

(Operation) Then, the bucket conveyor B is operated by the drive motor 24, the gate of the charging hopper 18 is opened, and the granular material Y is poured into the housing H.
After being lifted up in the ascending path 16 one after another by scooping up to 21, it is externally discharged from the discharge chute 19 to the next process.

On the other hand, when the air pressure generator 13 is actuated, the compressed air X enters the connecting pipe 2 of the air feeding injector I according to the present invention from the air feeding pipe 15 and passes through the air feeding passage U in the injector I. Gush toward the exit side. As a result, the residual powdery particles Y that have fallen to the bottom of the housing H without being scooped into the bucket 21 are sucked into the suction port 30 of the tank bottom 29.
From the bypass feed pipe 31 and is pneumatically fed from the bypass feed pipe 31 while swirling in the main body of the casing 1, and the discharge chute 19 at the end of the bypass feed pipe 32 or the bucket in the ascending passage 16.
Bypassed to 21.

As a result, the residual powder particles spilling to the bottom of the conveyor housing H are efficiently bypass-fed.

(Effects of the Invention) As described above, the present invention firstly forms a tapered pipe having a conical cross-section on the outlet side of the suction inlet pipe of the powder or granular material, and forms a portion from the outer periphery of the tapered pipe to the outlet side. Is covered with a bottomed outer cylinder having a conical cross section, and an air supply passage for the compressed air is formed between the outer cylinder and the tapered pipe, and a tangent line of the air supply passage is provided on one lower side of the bottomed outer cylinder. So that the supply air connecting pipe connected to the direction is formed eccentrically, and the compressed air introduced from the connecting pipe swirls from the air supply passage toward the inner peripheral surface of the outer cylinder on the outlet side of the powder or granules. The air-injection injector for the powder and granules, and secondly, a tapered pipe having a conical cross section is formed on the outlet side of the inlet pipe for suction of the powder and granules, and from the outer periphery of the tapered pipe to the outlet side. A part is covered with a bottomed outer cylinder having a conical cross section, and compressed air is supplied between the outer cylinder and the tapered pipe. Of the air supply passage, the air supply passage is radially defined by the swirl guide vanes of the compressed air, and is connected to the lower side of the bottomed outer cylinder in a tangential direction of the air supply passage. Is formed eccentrically, and the compressed air introduced from the connection pipe is guided by the swirl guide vanes of the air supply passage, and has a relatively large swirl pitch from the outer circumference of the throat of the tapered pipe toward the inner peripheral surface of the outer cylinder on the outlet side. Since it is an injector for air supply of powder and granules that swirls and spurts out by, it is formed by a venturi function by the injector, a swirl air supply function by the swirl force of the compressed air, and a swirl guide vane. The swirling air flow having a relatively large swirling pitch has various effects such as remarkably improving the feeding ability of the granular material.

[Brief description of drawings]

1 (a) (b) and 2 (a) (b) are a longitudinal sectional view, a plan sectional view and a third sectional view showing the first and second embodiments of the present invention.
FIG. 4 is a schematic diagram showing a state in which it is used in an air conveyor device, and FIG. 4 is a schematic diagram showing a state in which it is used in a bypass feeder for residual powder particles in a bucket elevator. Code table I ... Injector, X ... Compressed air Y ... Powder, U ... Supply passage T ... Supply passage 1 ... Outer cylinder with bottom, 2 ... Connection pipe 3 ... Tapered pipe, 4 ... Throat 5 ... Inlet pipe, 7 ... Outlet pipe 8 ... Bottom plate portion, 9 ... Revolving guide vane 10 ... Hopper or tank, 11 ... Feed pipe 12 ... Discharge chute, 13 ... Air pressure generator 14 …… Discharge port, 15 …… Air supply pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-93032 (JP, A) JP-A-59-153929 (JP, A) JP-A-56-141216 (JP, A) JP-A-62- 83926 (JP, A) JP 60-197522 (JP, A) JP 60-197521 (JP, A) JP 60-128128 (JP, A) JP 60-248516 (JP, A) 52-18187 (JP, U) 57-111726 (JP, U)

Claims (2)

[Claims] 1. A bottomed outer cylinder having a conical cross section in which a tapered pipe 3 having a conical cross section is formed on the outlet side of a suction inlet pipe 5 of the granular material Y, and the portion from the outer periphery of the tapered pipe 3 to the outlet side is formed. 1 to form a supply passage U for the compressed air X between the outer cylinder 1 and the taper pipe 3, and the tangential direction of the supply passage U to the lower one side of the bottomed outer cylinder 1 The connecting pipe 2 for air supply to be connected is formed eccentrically, and the compressed air X introduced from the connecting pipe 2 is swirled from the air supply passage U toward the inner peripheral surface of the outer cylinder 1 on the outlet side of the granular material Y. An injector for air-supplying powdered or granular material, characterized in that it is configured to blow out. 2. A bottomed outer cylinder having a conical cross section in which a tapered pipe 3 having a conical cross section is formed on the outlet side of a suction inlet pipe 5 of the granular material Y, and the portion from the outer periphery of the tapered pipe 3 to the outlet side is formed. 1 to form a supply passage U for the compressed air X between the outer cylinder 1 and the taper pipe 3, and the supply passage U is radially divided by the swirl guide vanes 9 of the compressed air X. The connecting pipe 2 for air supply is formed eccentrically on one side of the lower portion of the bottomed outer cylinder 1 and is connected to the tangential direction of the air supply passage U, and the compressed air X introduced from the connecting pipe 2 is the air supply passage. Guided by the U-shaped swirl guide vanes 9, the taper pipe 3 swirls at a relatively large swirl pitch from the outer periphery of the throat portion 4 toward the inner peripheral surface of the outer cylinder 1 on the outlet side, and jets out. Injector for air feeding of powder particles.