JPH11178469A - Spray nozzle and feed supply to fish culture tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray nozzle capable of automatically and pneumatically transporting a formula feed which has hitherto been abundantly used regardless of the shape of a fish culture tank, the fish species and rearing stage at all and uniformly spraying the formula feed within a wide range on the water surface of the fish culture tank. SOLUTION: This spray nozzle 1 comprises a body 4 having a through-hole 41 and a mounting pipe 5 for mounting the spray nozzle 1 on the tip of a horizontal tip 31 of a transportation pipe and one horizontal pipe is composed of both the body 4 and the mounting pipe 5 as a whole. The body 4 is provided with a lower protrusion 42 and an upper protrusion 43. The upper protrusion 42 is protruded from the lower side into the interior of the through-hole 41. The upper protrusion 43 is protruded from the upper side into the interior of the through-hole 41. The protruding length of the upper protrusion 43 can be regulated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to the shape of fish tanks such as land tanks and marine cages, the species of fish such as crustaceans, freshwater fish, and saltwater fish, and the breeding stages of seedling production, intermediate breeding, and parent fish cultivation. Regardless of the type of feed used,
The present invention relates to a spray nozzle and a method of feeding a fish tank which can be automatically and pneumatically transported and spread over a wide range of the water surface of the fish tank.

[0002]

2. Description of the Related Art Conventionally, as an automatic feeding method by pneumatic transportation, a direct spray method has been mainly used. FIG.
Is a longitudinal sectional view showing a state of feeding by a conventional direct spraying method, and FIG. 15 is a plan view of the same. What is the direct spray method?
In this method, the feed that has been transported by air is directly scattered from the horizontal end portion 31 of the transport pipe that projects above the water surface from one side wall 21 of the fish tank 2. However, in this method, since the flight distance of the compound feed is substantially determined according to the physical properties and shape of the compound feed, the spraying region tends to be local,
It was not suitable for feeding large fish tanks. As can be seen from both figures, the spray area 10 was narrow. On the other hand, in order to eliminate such local spraying, a method has been proposed in which an obstacle, a rotary impeller, or the like is provided in the vicinity of a spraying opening, and a compound feed is caused to collide with these to exert a diffusion effect.
However, this method has a problem that the compound feed adheres to obstacles and the like, resulting in unsanitary condition.

[0003] The present invention provides a compound feed that has been used frequently, regardless of the type of fish tank, the type of fish, and the breeding stage.
It is an object of the present invention to provide a spray nozzle and a method for feeding a fish tank which can be automatically and pneumatically transported and spread over a wide range of the water surface of the fish tank.

[0004]

In order to achieve the above object, an invention according to claim 1 is provided at a horizontal end of a transport pipe, and sprays a compound feed, which has been transported pneumatically, on the surface of a fish tank. The nozzle consists of a horizontal pipe having a lower projection and an upper projection from the tip side inside the pipe, the inner diameter of which is set larger than the transport pipe, the lower projection protrudes from the lower side into the pipe, and the upper projection is the upper side into the pipe. And the protrusion length of the upper protrusion is adjustable.

According to a second aspect of the present invention, in the first aspect of the present invention, the lower projection and the upper projection have a shape that is sharp toward the base end side and gradually increases in projection toward the distal end side. It is what you have.

According to a third aspect of the present invention, there is provided a feeding method for pneumatically transporting a compound feed and spraying the mixed feed from the tip of the transport pipe to the surface of the fish tank while controlling the air volume of the pneumatic transport from the horizontal tip of the transport pipe. It is to spray the feed, control the air volume, by ensuring that the air supply valve of the main air supply pipe to the transport pipe is always open, secure the air volume required for stable transport of the compound feed in the transport pipe, By repeatedly opening and closing the air supply valve of the auxiliary air supply pipe, the air volume is periodically increased within a certain range.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the mixed feed is sprayed from a spray nozzle provided at a horizontal tip of the transport pipe. It consists of a horizontal pipe having a projection and an upper projection, the inner diameter of which is set larger than the transport pipe,
The lower projection projects from the lower side into the tube, the upper projection projects from the upper side into the tube, and the length of the projection of the upper projection is adjustable.

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, the compound feed is sprayed while the horizontal tip of the transport pipe is turned left and right by a rotary actuator.

According to a sixth aspect of the present invention, in the fourth aspect of the present invention, the compound feed is sprayed while the spray nozzle of the transport pipe is rotated left and right by a rotary actuator.

[0010]

(Embodiment 1) FIG. 1 is a longitudinal sectional view showing a state of feeding using a spray nozzle of the present invention, and FIG. 2 is a plan view of the same. The spray nozzle 1 is attached to the tip of the horizontal tip 31 of the transport pipe that projects above the water surface from one side wall 21 of the fish tank 2, and the mixed feed is sprayed from the spray nozzle 1. As can be seen from both figures, when feeding is performed using the spray nozzle 1 of the present invention, the spray area 10 of the compound feed becomes wide in both the perspective direction and the left and right direction.

FIG. 3 is a partially cutaway side view of the spray nozzle 1 of the present invention, and FIG. 4 is a view taken in the direction of arrow IV in FIG. The spray nozzle 1
A main body 4 having a through hole 41 and a horizontal tip 31 of a transport pipe;
And a mounting tube 5 for mounting at the tip of
One horizontal tube is constituted as a whole. Note that a support tube 6 is provided so as to cover the mounting tube 5 and the horizontal tip portion 31, and the main body 4 is fixed to the support tube 6 via a bracket 62 attached with a thumb screw 61.

In the main body 4, as shown in FIG. 5, which is a cross-sectional view of the main body 4, the inner diameter of the through hole 41 is set to be larger than the inner diameter of the transport pipe, and the through hole 41 is directed toward the distal end side (direction A). It is expanding. Further, the main body 4 is provided with a lower projection 42 and an upper projection 43.

FIG. 6 is a side view of the lower projection 42, and FIG.
8 is a view taken in the direction of the arrow VII. FIG. 8 is a view taken in the direction of the arrow VIII in FIG. The lower protrusion 42 is made of rubber, and has a protrusion 421 and a mounting portion 422.
The fixing portion 422 is fixed to the main body 4 by the thumb screw 63 at the mounting portion 422, and the protrusion 421 protrudes into the through hole 41 from below. The protruding portion 421 is pointed toward the base end (in the direction B) and gradually protrudes toward the distal end, and has a triangular pyramid shape as a whole. The lower projection 42 is provided so as to coincide with the tip of the through hole 41.

FIG. 9 is a side view of the upper projection 43, and FIG. 10 is a view as viewed from the direction of the arrow X in FIG. The upper protrusion 43 is a rubber rod having a sharp tip, and is attached to the main body 4 by being fitted into a vertical hole 44 of the main body 4. Upper protrusion 4
The three pointed tip portions 431 protrude from the upper side into the through holes 41. The protruding length of the distal end portion 431 is gradually increased toward the proximal end side and toward the distal end side,
It has a triangular pyramid shape as a whole. Upper protrusion 43
Is slidable in the hole 44 by applying pressure, whereby the length of the protrusion into the through hole 41 can be adjusted. The upper protrusion 43 is provided closer to the base end than the lower protrusion 42, and is provided here at a position where the inner diameter of the through hole 41 starts to expand.

When spraying is performed using the spray nozzle 1 having the above-described structure, the compound feed is sprayed as follows. That is, in FIG. 3, the compound feed that has been pneumatically transported through the transport pipe passes through the horizontal distal end portion 31 and the mounting pipe 5 and passes through the through hole 41 of the main body 4 and is sprayed. At that time, the compound feed that passes without colliding with any of the upper protrusion 43 and the lower protrusion 42 is
Because it is not slowed down, it flies straight as far as possible. On the other hand, a part of the compound feed passing above the inside of the through-hole 41 is:
Since it collides with the upper projection 43 and is decelerated, the flight distance is reduced. Further, the compound feed passing below the inside of the through-hole 41 collides with the lower projection 42, is decelerated, and spreads right and left with the traveling direction divided into right and left. Therefore, by passing the mixed feed through the spray nozzle 1,
As shown in (1), it is widely spread both in the near and far directions.

The projection 421 of the lower projection 42 and the tip 431 of the upper projection 43 have the shape of a triangular pyramid that is pointed toward the base end and are made of rubber. The colliding feed is not directly affected by the impact of the collision, so that the crushing and pulverization of the feed due to the collision are suppressed.

If the length of the protrusion of the upper projection 43 into the through-hole 41 is increased, the proportion of the compound feed that collides with the upper protrusion 43 increases. It will be spread over distance. On the other hand, if the length of protrusion of the upper protrusion 43 into the through hole 41 is reduced,
Since the degree of collision with the upper protrusion 43 is reduced, the flying distance of the compound feed is suppressed from being reduced, and the mixed feed is sprayed over a long distance. That is, the flying distance of the compound feed is adjusted by the upper protrusion 43.

(Embodiment 2) The present embodiment relates to a method of feeding while using the spray nozzle 1 having the above-described structure and controlling the air volume of pneumatic transportation. FIG. 11 is a configuration diagram of the pneumatic transport mechanism. The transport pipe 3 is connected upstream thereof to a hopper 50 storing the mixed feed. Hopper 50 is blow-through rotary feeder 51
Built-in. The hopper 50 has an air source 52.
Is connected to a main air supply pipe 54 and an auxiliary air supply pipe 55 connected via a pressure reducing valve 53, and the transport pipe 3 is supplied with air for pneumatically transporting the mixed feed.
An air supply valve 541, a flow control valve 542, and a check valve 543 are interposed in the main air supply pipe 54 from the upstream, and the air supply valve 551 and the flow control valve in the auxiliary air supply pipe 55 from the upstream. 5
52 and a check valve 553 are interposed. Note that a plurality of main air supply tubes and auxiliary air supply tubes may be provided.

Feeding according to the present embodiment is performed as follows. That is, first, the air supply valve 541 is always opened, and the air flow supplied by the main air supply pipe 54 is set to an amount necessary for stable transportation of the mixed feed in the transportation pipe 3 by adjusting the flow rate adjustment valve 542. . At the same time, in this state, the air supply valve 551 is repeatedly opened and closed, and
Set to increase periodically within a certain range. In addition,
The fixed range is set to a value by adjusting the flow rate adjusting valve 552 so that, for example, when the maximum value exceeds the maximum value, the compound feed is scattered outside the fish tank 2. And
Under such air volume increase control, the mixed feed in the hopper 50 is pneumatically transported through the transport pipe 3 and the horizontal tip 31 thereof, and is discharged from the spray nozzle 1.

In the above feeding method, the auxiliary air supply pipe 55
Since the air volume increase control is performed by repeatedly opening and closing the air supply valve 551, the spraying area is enlarged as compared with a case where the air volume increase control is not performed. Therefore, Embodiment 1
As compared with the case of feeding in the above, the spraying area expands in both the perspective direction and the left and right direction.

By the way, if the air supply pipe is one system and the air volume is controlled by repeatedly opening and closing the air supply valve of the air supply pipe, the compound feed supplied to the transport pipe is not sufficiently accelerated. There is a danger that the compound feed stays and adheres in the transport pipe, further deteriorates and decomposes, and finally blocks.
However, in the present embodiment, the air volume control is performed by repeatedly opening and closing the air supply valve 551 of the auxiliary air supply pipe 55 after securing the air volume required for stable transport of the compound feed by the main air supply pipe 54. Therefore, there is no such danger in the case where the supply pipe is one system.

(Embodiment 3) This embodiment relates to a method of feeding while using the spray nozzle 1 having the above-described structure and rotating the spray nozzle 1 in the left-right direction. FIG.
2 is a plan view showing a state of feeding when the horizontal distal end portion 31 of the transport pipe 3 is turned at the base end. This turn
This is performed by operating a rotary actuator (not shown) provided at the base end of the horizontal distal end portion 31. As shown in FIG. 12, the distribution area 10 is enlarged in the left-right direction.

In addition, as shown in FIG.
It may be turned by a rotary actuator (not shown). This also enlarges the spray area in the left-right direction.

Further, in this method, the air volume control in the second embodiment may be performed. According to this, the spreading area is considerably enlarged.

(Embodiment 4) In Embodiment 2 or 3, only the air volume control in Embodiment 2 may be performed without using the spray nozzle 1. Therefore, the compound feed is sprayed from the tip of the horizontal tip 31 of the transport pipe. Even with this method, the spraying area is enlarged as compared with the related art.

[0026]

According to the first aspect of the present invention, since the upper projection can be sprayed in a short distance, and the lower projection can be sprayed in the left-right direction, the compound feed can be moved in the near-far direction and the left-right direction. Can be spread over a wide area.

Moreover, since the upper projection and the lower projection are provided in the pipe, the upper projection and the lower projection are always washed by a high-speed airflow. Therefore, it is possible to prevent the compound feed from adhering to the upper protrusion and the lower protrusion, and to keep both protrusions hygienic.

According to the second aspect of the present invention, the compound feed colliding with the lower protrusion and the upper protrusion is prevented from being subjected to the impact of the collision, so that the compound feed is crushed or powdered by the collision. Can be suppressed. Therefore, it is possible to prevent the water quality of the fish tank from being deteriorated or the spray nozzle from being clogged by the powdered compound feed.

According to the third aspect of the present invention, the air volume is controlled by securing the air volume necessary for stable transportation of the compound feed.
Since the air volume is periodically increased within a certain range, the scatter area can be expanded as compared with a case where the air volume is not increased. In addition, the compound feed in the transport pipe can be sufficiently accelerated, so that the compound feed in the transport pipe can be prevented from staying and adhering, and furthermore, deteriorating and spoiling.

According to the fourth aspect of the present invention, the compounded feed can be spread over a wide range both in the near and far directions and in the left and right directions by the spray nozzle.

According to the fifth or sixth aspect of the present invention, the spraying area can be further expanded in the left-right direction.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state of feeding according to a first embodiment.

FIG. 2 is a plan view showing a state of feeding according to the first embodiment.

FIG. 3 is a partially cutaway side view of the spray nozzle according to the first embodiment.

FIG. 4 is a view taken in the direction of arrow IV in FIG. 3;

FIG. 5 is a cross-sectional view of the main body of the spray nozzle.

FIG. 6 is a side view of the lower protrusion.

7 is a view taken in the direction of the arrow VII in FIG. 6;

FIG. 8 is a view taken in the direction of the arrow VIII in FIG. 6;

FIG. 9 is a side view of the upper protrusion.

10 is a view as viewed in the direction of the arrow X in FIG. 9;

FIG. 11 is a configuration diagram of a pneumatic transport mechanism according to a second embodiment.

FIG. 12 is a plan view showing a state of feeding in a third embodiment.

FIG. 13 is a plan view showing a state of feeding according to another example of the third embodiment.

FIG. 14 is a longitudinal sectional view showing a state of feeding by a conventional direct spraying method.

FIG. 15 is a plan view showing a state of feeding by a conventional direct spray method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 spray nozzle 2 fish tank 3 transport pipe 31 horizontal tip 42 lower projection 43 upper projection 54 main air supply pipe 541,551 air supply valve 55 auxiliary air supply pipe

Claims (6)

[Claims] 1. A spraying nozzle provided at a horizontal tip of a transport pipe for spraying a pulverized feed fed by air to a water surface of a fish tank, comprising a horizontal pipe having a lower projection and an upper projection from the tip side in the pipe. , Its inner diameter is set larger than the transport pipe, the lower protrusion protrudes from below in the pipe, the upper protrusion protrudes from above in the pipe, and the protrusion length of the upper protrusion is adjustable A spray nozzle characterized by the following. 2. The spray nozzle according to claim 1, wherein the lower protrusion and the upper protrusion have a shape that is sharp toward the base end and gradually increases in the length toward the front end. 3. A feeding method in which the compound feed is pneumatically transported and sprayed from the tip of the transport pipe to the surface of the fish tank, wherein the compound feed is sprayed from the horizontal tip of the transport pipe while controlling the air volume of the pneumatic transport. Yes, the air flow is controlled by keeping the air supply valve of the main air supply pipe to the transport pipe always open to secure the air volume necessary for the stable transport of compound feed in the transport pipe, and to supply air to the auxiliary air supply pipe. A method for feeding a fish tank, wherein the air volume is periodically increased within a certain range by repeatedly opening and closing a valve. 4. A spray nozzle for spraying a compound feed from a spray nozzle provided at a horizontal tip of a transport pipe, wherein the spray nozzle comprises a horizontal pipe having a lower projection and an upper projection from the tip side in the pipe. 4. The projection according to claim 3, wherein the projection is set larger than the transport pipe, the lower projection projects from the lower side into the pipe, the upper projection projects from the upper side into the pipe, and the projection length of the upper projection is adjustable. How to feed the fish tank. 5. The method for feeding a fish tank according to claim 3, wherein the compound feed is sprayed while turning the horizontal tip of the transport pipe in the left-right direction by a rotary actuator. 6. The method for feeding a fish tank according to claim 4, wherein the compound feed is sprayed while the spray nozzle of the transport pipe is swung left and right by a rotary actuator.