JPS62218326A - Injector for feeding air to granular body - Google Patents

Abstract

PURPOSE:To improve a feeding capacity for a grannular body by using a venturi function by an injector and a turning air stream which is generated by a swirl guide vane and has a relatively large spiral pitch. CONSTITUTION:Pressurized air X is guided from the connecting port 2A of a connecting pipe 2 to the inner wall tangential direction of the air lowering passage of a casing main body 1, descends while being turned in the wind lowering passage, hits an arc-shaped bottom plate section 4 and is changed in direction, enters an air lifting passage U, and is sprayed through the throat section 3A outer periphery of a taper inner tube 3 toward the outlet side with a relatively large spiral pitch while being turned and guided by a swirl guide vane 9 having a relatively slack spiral gradient in the air lifting passage U. A negative pressure is generated from the vicinity of the throat section 3A of the taper inner tube 3 to the inner periphery below by the turning force of this pressurized air X, thereby a granular body Y at the guide side is absorbed into the casing main body 1 and is discharge, while being turned, toward a feed pipe 11 at the outlet side through a feed passage T formed at the center position in the casing main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an injector for air feeding powder and granular material in an air conveyor device.

(Prior Art) Conventionally, an air conveyor device connects a hopper or tank at the proximal end with a storage tank at a remote location or a tank for the next process using a long feed pipe. No. Publication,
As shown in Japanese Utility Model Publications No. 46-34532 and No. 37-6839, powder particles are removed by air supply pipes and blowers installed at the proximal end, or by air supply pipes and blowers interposed in the middle of the feed pipes. Smooth air supply for bodies and other conveyed objects.

At that time, in order to feed various conveyed items even more efficiently,
B. In the case of the withdrawal device shown in Japanese Patent Publication No. 49-5409, the air supply tube is placed in the air chamber formed on the outer periphery of the proximal end of the inner tube on the inlet side, and the outer tube is placed on the outer periphery of the distal end of the air chamber. The conveyance of fresh concrete is handled by blowing out pressurized air from the blow-off holes in the gap in the chamber toward the outer tube on the exit side.

Furthermore, in the case of the pneumatic transport device disclosed in Japanese Patent Publication No. 49-36317, a transport pipe injector is formed on the outer periphery of the distal end of the suction pipe, and the transport pipe is connected to the outlet side of the injector. Pressurized air to the injector is ejected from the gap between the end of the suction pipe and the injector toward the transport pipe, thereby ensuring smooth suction and conveyance of the lightweight container body.

In addition, in the case of the object conveying device disclosed in 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 introduction section at the rear of the lower part is transferred to the tip of the guide tube. Empty pipes can be smoothly transported by ejecting them from the gap between the pipe and the funnel-shaped outer pipe toward the transport pipe.

In addition, in the case of the suction/pressure feeding device shown in 2. Japanese Patent Publication No. 59-4328, an air chamber is formed outside the supply pipe, and the pressurized air supplied from the blower to the air chamber is
By ejecting water from the gap around the outer circumference of the supply pipe to the tapered inner cylinder on the downstream side, it is possible to handle the suction and pressure feeding of bottles.

(Problem to be Solved by the Invention) However, in the case of such conventional devices, various conveyed objects are conveyed in the lateral direction simply by blowing air, and the feeding capacity is mainly dependent on the blower. It usually depends on the capacity. Therefore, instead of primarily adopting a large-capacity blower, we have developed an air supply system for powder and granular materials that can dramatically improve the feeding capacity by improving the injector itself that ejects pressurized 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 unique m-shaped powder particles are placed at the suction port of the feed pipe and at key points of the feed pipe. The air supply injector of the body is connected, and the injector has a venturi function, a swirling air supply function due to the swirling force of the compressed air, and a swirling air flow with a relatively large swirling pitch formed by the swirling guide vanes. This is an attempt to improve the feeding ability for powder and granular materials.

DESCRIPTION OF THE PREFERRED EMBODIMENTS First to third embodiments of an air supply injector 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 1(b) showing a first embodiment of the present invention, 1 is a cylindrical casing body of an air supply injector I, and the upper part on the negative side thereof is In this example, a connecting pipe 2 for supplying pressurized air X is eccentrically formed, and a 1-inch flange 2F is fixed to the end thereof. Reference numeral 3 denotes a tapered inner cylinder having a conical cross section with a small diameter at the upper part and a large diameter at the lower part, and is formed at the center of the tube of the casing body 1, with the small diameter part at the upper end serving as the opening throat part 3A. Reference numeral 4 denotes an arc-shaped bottom plate portion that reversely guides the feeding direction of the compressed air X, and connects and connects the large diameter portion below the tapered inner cylinder 3 and the lower portion of the casing body 1 in an arc shape. Reference numeral 5 denotes an inner cylinder for suctioning the powder Y, which is inserted from the lower large diameter side of the tapered inner cylinder 3 and the upper end of the inner cylinder 5 is joined and fixed to the opening throat 3A. The lower end portion of 5 is joined and fixed to the center of the lower filA of the casing body 1. Reference numeral 6 denotes a tapered inlet pipe for suctioning the powder Y, which has a conical cross section, and the small diameter portion of the upper end of the tapered inlet pipe 6 is joined and fixed to the lower end of the inner cylinder 5. A mounting flange 6F is fixed to the large diameter portion on the inlet side of the lower end of 6. Reference numeral 7 denotes a tapered outer cylinder having a conical cross section with an open end 7A having a small diameter at the upper part and a large diameter at the lower part.
The upper end portion of the casing body 1 is bonded and fixed to the center of the upper MIB of the casing body 1.

Reference numeral 8 denotes a cylindrical outlet pipe that is joined and fixed to the small diameter portion on the outlet side of the tapered outer cylinder 7, and a mounting flange 8F is fixed to the upper end thereof.

In addition, D is a land and wind passage for the pressurized air X formed between the casing body 1 and the tapered outer cylinder 7, and the pressurized air introduced from the connection port 2A of the connection pipe 2 toward the direction in which it contacts the inner wall of the casing body 1. X descends while turning toward the lower part of the downflow passage.

U is an ascending passage for the pressurized air X formed between the tapered inner cylinder 3 and the tapered outer cylinder 1, and the pressurized air
rises from between the bottom plate part 4 and the lower end large-diameter part of the tapered outer cylinder 7 while rotating inside the rising air passage U, and from the outer periphery of the throat part 3A of the tapered inner cylinder 3 to the outlet side of the tapered outer cylinder 7 Circulating air rises along the inner peripheral surface.

(Example 2) Also, in FIGS. 2(a) and (b) showing the second example,
Reference numeral 9 denotes a swirling guide vane for the pressurized air X, and the swirling guide vane 9 is twisted into a relatively gentle spiral slope, and divides the air ascending passage U into a plurality of chambers in the radial direction.

In this case, unlike the case of the first embodiment, the air supply connecting pipe 2 is connected to the top of the casing body 1. It is installed protruding from the EIB. Therefore, the pressurized air X introduced from the air supply connecting pipe 2 flows almost straight toward the bottom plate part 4 without turning in the downdraft passage D, and then hits the bottom plate part 4 and is reversed.
Swivel guide vane 3 with a relatively gentle spiral slope in the rising air passage U
While being guided in a rotational manner, it is ejected from the outer periphery of the throat 3A of the tapered inner cylinder 3 toward the outlet side at a relatively large rotational pitch.

(Embodiment 3) Furthermore, in the case of the third embodiment shown in FIGS. 3(a) and 3(b), the air supply connecting pipe 2 is connected to the casing body 1 at approximately the same position as in the first embodiment. The upper side is eccentrically formed toward the downflow passage D, and the rotating guide vane 9 is formed in the upflow passage U as in the second embodiment.

In this case, the pressurized air X introduced from the connection port 2A of the air supply connection pipe 2 first descends while turning in the downdraft passage D, hits the bottom plate part 4, and is reversed, and is then turned around in the updraft passage D. While being guided by the rotating guide vanes 3 having a relatively gentle spiral slope, the liquid is ejected from the outer periphery of the throat 3A of the tapered inner cylinder 3 toward the outlet side at a relatively large rotating pitch.

(Usage Example 1) In Fig. 4, which shows a case where the injector of the third embodiment is configured as an air conveyor device among the injectors for air feeding of the powder Y shown in the first to third embodiments. , 10
is a hopper or tank portion disposed at the base end of the air conveyor device, and stores or deposits the powder Y as appropriate. Reference numeral 11 denotes a feeding pipe for the powder and granular material Y, which is suitably arranged in the vertical and horizontal directions, and the air feeding injector I is disposed at its base end or at an appropriate position on the feeding pipe 11, and The mounting flanges 6F and 8F are connected and fixed to the feed pipe 11. 1
2 is a discharge chute disposed at the end of the feed pipe 11; 13;
is an air pressure generator such as a pressure generator or a blower, and one or more air supply pipes 15 are branched and tangential to its discharge port 14,
The other end is connected to the mounting flange 2F of the air supply connecting pipe 2 of the air supply injector (2).

(Function) When the air pressure generator 8113 is activated, the pressurized air
is introduced into the tangential direction of the inner wall of the downflow passage D of the casing body 1, descends while turning around the downflow passage, hits the arcuate bottom plate part 4, changes direction, enters the upflow passage U, and enters the upflow passage U. A rotating guide vane 3 with a relatively gentle spiral slope
While being guided in a rotational manner, it is ejected from the outer periphery of the throat 3A of the tapered inner cylinder 3 toward the outlet side at a relatively large rotational pitch.

Due to the swirling force caused by this pressurized air X, the tapered inner cylinder 3
Negative pressure is formed from the vicinity of the throat 3A to the lower inner circumferential surface of the casing body 1, which sucks the powder Y on the introduction side into the casing body 1, and the feed is formed at the center of the casing body 1. It is sent out from the passage T toward the feed pipe 11 on the outlet side while turning.

In addition, pressurized air X is similarly supplied to the air feeding injector 1 portion of this kind of air feeding injector 1 disposed in the middle of the feeding pipe 11, and this replenishes the swirling feeding force for the powder Y as appropriate. While increasing in strength, it is finally discharged to the outside from the discharge chute 12.

(Usage example 2) In the above case, the first to third air supply injectors I
Although the embodiment has been described in terms of a case in which the piping is arranged in an air conveyor device, this can also be applied to a bypass feeding device for residual matter in a packet elevator as shown in FIG.

That is, in FIG. 5, H is a conveyor housing, which is composed of an ascending passage 16 and a descending passage 17. Reference numeral 18 denotes a charging hopper for the powder Y, which is formed on the ascending passage 1G side in the lower part of the housing H.

Reference numeral 19 denotes a discharge chute, which is formed on the lowering passage 11 side at the upper end of the housing H. B is a packet conveyor in which a large number of packets 21 are attached to an endless belt 20 (or chain), and both upper and lower ends thereof are connected to a housing (
It is suspended and supported by flat pulleys 22 and 23 that span both the upper and lower ends of the. Reference numeral 24 denotes a drive motor for the packet conveyor B, which is fixedly installed on a motor base 2S at the upper end of the housing H. 21i is a driving pulley fixed to the rotating shaft of the drive motor 24, 27 is a driven pulley fixed to the rotating shaft of the flat pulley 22 on the upper side, and 28 is a belt suspended between the driving pulley 26 and the driven pulley 27. be.

Next, a bypass feeding device for the powder Y remaining in the packet elevator as described above will be explained. Reference numeral 29 indicates the arcuate tank bottom of the housing H, and 30 indicates the residual powder Y having an opening formed in the tank bottom 29. 31 is a bypass feed pipe for the residual powder Y that connects the suction port 38 and the mounting flange 6F at the lower end of the injector, 32 is one end connected to the injector I
It is a bypass feed pipe connected to the upper end mounting flange 8F, and the other ends 32A and 32B are connected to the housing 1-
It faces the discharge chute 19 at the upper end of the container 1, or is provided so that the residual powder Y can be thrown into the packet 21 in the ascending passage 1B.

The air supply pipe 15 connects the mounting flange 2F of the air supply connecting pipe 2 and the discharge port 14 of the air pressure generator 13.

(Function) Then, when the packet conveyor B is operated by the drive motor 24 and the gate of the input hopper 18 is opened to allow the powder Y to flow into the housing, the powder Y is transferred to the packet 21. While being scooped up one after another, they ascend in the ascending passage 16 and are then discharged to the outside from the discharge chute 19 to the next process. On the other hand, when the air pressure generation fi13 is activated, the pressurized air X enters the air supply pipe 15 into the connection pipe 2 of the air supply injector I according to the present invention, and flows through the downflow passage D and outside air passage U of the casing body 1. As a result, the residual powder Y that was not scooped up by the packet 21 and fell to the bottom of the housing H is drawn in from the suction port 38 at the bottom of the tank bottom 29. Pneumatic air is fed from the bypass feed pipe 31 while rotating inside the casing body 1, and the air is fed to the discharge chute 19 at the end of the bypass feed pipe 32.
, or is bypass-transferred toward the bucket 21 in the ascending passage 1G. In this way, efficient bypass feeding of the residual material that has spilled onto the bottom of the conveyor housing H is performed.

In the air conveyor shown in the first and second embodiments, the pressurized air supplied from the air pressure generator 13 to the injector (2) is not just normal temperature air, but is heated to about 5 degrees Celsius in advance by a heater device (not shown). If heated air is supplied, the temperature difference that normally forms between the powder and granular material during conveyance and the compressed air that is the conveyance medium will not occur, and therefore, in this type of equipment, This is useful for eliminating dew condensation and preventing adverse effects caused by heat contained in powder and granules during transportation, rice polishing, etc.

(Effects of the Invention) As described above, the present invention first includes forming a tapered inner cylinder and a tapered outer cylinder at the central position of a sealed casing body, and forming an inner cylinder for suctioning powder and granular material in the tapered inner cylinder. Built-in,
A tapered inlet pipe for suctioning powder and granular material is fixed to the inlet side of the inner cylinder, an outlet pipe for powder and granular material is fixed to a small diameter part on the outlet side of the tapered outer cylinder, and a gap between the casing body and the tapered outer cylinder is fixed. A land air passage for pressurized air is formed between the tapered outer cylinder and the tapered inner cylinder, and an outside air passage for the compressed air whose direction has been changed is formed between the tapered outer cylinder and the tapered inner cylinder. An air supply connecting pipe connected to the tangential direction is eccentrically formed, and the pressurized air introduced from the connecting pipe swirls from the land air passage to the outside air passage and from the outer periphery of the throat of the tapered inner cylinder toward the outlet side. Second, a tapered inner cylinder and a tapered outer cylinder are formed at the center of a sealed casing body, and powder is injected into the tapered inner cylinder. An inner cylinder for suction of granules is provided inside, a tapered inlet pipe for suction of granules is fixed to the inlet side of the inner cylinder, and an outlet pipe for suction of granules is fixed to a small diameter part on the outlet side of the tapered outer cylinder. A land air passage for pressurized air is formed between the casing body and the tapered outer cylinder, and an outside air passage for the compressed air whose direction is changed is formed between the tapered outer cylinder and the tapered inner cylinder, and the The wind passage is divided in the radial direction by swirling guide vanes for pressurized air, and an air supply connection pipe with the land and wind passage is formed in the casing body, and the pressurized air introduced from the connection pipe to the land and wind passage is The injector for supplying air of powder and granular material is also provided, which is configured to jet air from the outer periphery of the throat of a tapered inner cylinder toward the outlet side at a relatively large swirling pitch while being guided by the swirling guide vanes of the air passage. 3, a tapered inner cylinder and a tapered outer cylinder are formed at the center of the sealed casing body, an inner cylinder for suctioning powder and granules is provided inside the tapered inner cylinder, and a powder suction cylinder is provided on the inlet side of the inner cylinder. A tapered inlet pipe for body suction is fixed, an outlet pipe for powder and granular material is fixed to a small diameter part on the outlet side of the tapered outer cylinder, and a land-air passage for pressurized air is provided between the casing body and the tapered outer cylinder. , an outside air passage for the compressed air whose direction has been changed is formed between the tapered outer cylinder and the tapered inner cylinder, and the rising air passage is divided in the radial direction by a swirling guide vane for the pressurized air, and one part of the casing body is formed. An air supply connection pipe connected to the tangential direction of the land breeze passage is eccentrically formed on the side, and the pressurized air introduced from the connection pipe swirls around the land breeze passage and is guided by the swirling guide vanes of the field breeze passage. This is an injector for air supply of powder and granular material that is ejected from the outer periphery of the throat of the tapered inner cylinder toward the outlet side at a relatively large rotational pitch.
The powder and granular material feeding ability is enhanced by the venturi a function of the injector, the swirling air supply function by the swirling force of the compressed air, and the swirling air flow with a relatively large swirling pitch formed by the swirling guide vanes. It brings about various effects such as significantly improving the condition.

[Brief explanation of drawings]

1(a)(b) to 3(a)(b) are longitudinal sectional views and plan sectional views showing the first to third embodiments of the present invention, and FIG.
The figure is a schematic diagram showing the state in which it is used in an air conveyor device, and FIG. 5 is a schematic diagram showing the case in which it is used in a bypass feeding device for residual matter in a baguette elevator. code table

Claims (3)

[Claims] (1) A tapered inner cylinder 3 and a tapered outer cylinder 7 are formed at the center of the sealed casing body 1, and the tapered inner cylinder 3
An inner cylinder 5 for suctioning the powder Y is provided inside, a tapered inlet pipe 6 for suctioning the powder Y is fixed to the inlet side of the inner cylinder 5, and a small diameter part of the tapered outer cylinder 7 is used for sucking the powder Y. The outlet pipe 8 of the body Y is fixed, and a downflow passage D for the pressurized air An ascending passage U for the converted compressed air The powder is characterized in that the compressed air X introduced from No. 2 is configured to swirl from the downflow passage D to the upflow passage U and blow out from the outer periphery of the throat 3A of the tapered inner cylinder 3 toward the outlet side. Injector for air supply of granules. (2) A tapered inner cylinder 3 and a tapered outer cylinder 7 are formed at the center of the sealed casing body 1, and the tapered inner cylinder 3
An inner cylinder 5 for suctioning the powder or granular material Y is provided therein, a tapered inlet pipe 6 for suctioning the powder or granular material Y is fixed to the inlet side of the inner cylinder 5, and a small diameter part on the outlet side of the tapered outer cylinder 7 is fixed to the inlet side of the inner cylinder 5. An outlet pipe 8 for the powder Y is formed, a downflow passage D for the pressurized air X is formed between the casing body 1 and the tapered outer cylinder 7, and a downflow passage D is formed between the tapered outer cylinder 7 and the tapered inner cylinder 3. A rising passage U is formed for the pressurized air X whose direction has been changed to
A connecting pipe 2 for air supply with the downflow passage D is formed in the casing body 1, and the pressurized air X introduced from the connection pipe 2 into the downflow passage D
The powder is characterized in that it is configured to be swivel-guided by the swiveling guide vanes 9 of the air lift passage U and jetted out from the outer periphery of the throat 3A of the tapered inner cylinder 3 toward the outlet side at a relatively large swivel pitch. Injector for air supply of granules. (3) Tapered at the center of the sealed casing body 1
30 - An inner cylinder 3 and a tapered outer cylinder 7 are formed, an inner cylinder 5 for suctioning the powder Y is installed inside the tapered inner cylinder 3, and the inner cylinder 5 is
A tapered inlet pipe 6 for suctioning the powder Y is fixed to the inlet side of the casing body 1, and an outlet pipe 8 for the powder Y is formed at the small diameter portion of the outlet side of the tapered outer cylinder 7, and the casing body 1 and the tapered outer cylinder 1
A downflow passage D for the pressurized air X is formed between the tapered outer cylinder 1 and the tapered inner cylinder 3, and an upflow passage U for the compressed air X whose direction has been changed is formed between the tapered outer cylinder 1 and the tapered inner cylinder 3. The air supply connecting pipe 2 is eccentrically formed on one side of the casing main body 1 and connects to the tangential direction of the downflow passage D. The pressurized air X introduced from 2 swirls in the downdraft passage D,
For air feeding of powder and granular material, characterized in that it is configured to be swivel-guided by the swiveling guide vanes 9 of the tapered inner cylinder 3 and blow out from the outer periphery of the throat 3A toward the outlet side at a relatively large swiveling pitch. injector.