JPH08112557A - Nozzle pipe for power sprayer - Google Patents

Abstract

PURPOSE: To avert the occurrence of large differences in application amts. at the boundaries between spraying hole groups by forming the spraying holes existing near the boundaries of the spraying hole groups adjacent to each other to the arrangement in which the spraying holes varying in areas formed with the spraying hole groups adjacent to each other are mixed alternately zigzag with each other. CONSTITUTION: This nozzle pipe has the plural spraying hole groups B, C along the longitudinal direction of a nozzle pipe body 10. The areas of the respective spraying holes 2b, 2c formed in the individual spraying hole groups B, C are made respectively uniform. The spraying holes 2b, 2c existing near the boundaries of the spraying hole groups B, C adjacent to each other are formed to the arrangement R in which the spraying holes 2b, 2c varying in the areas formed with the spraying hole groups B, C adjacent to each other are mixed with each other. As a result, the occurrence of the large differences in the application amts. in the boundary parts of the spraying hole groups B, C with each other is averted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet tube for a power spreader.

[0002]

2. Description of the Related Art When a powdery or granular chemical agent or the like is sprayed on a large scale in a paddy field or the like, a so-called multi-hole spray tube in which a large number of spray holes are distributed at predetermined intervals along the length direction is used. There is known a power spreader in which a spraying agent is pressure-fed by an air flow from a power blower into the inside of a pipe and jetted together with air from the spray hole.

In the injection pipe for this power spraying machine, if spraying holes of the same diameter are formed over the entire length, for example,
The amount of the spraying agent discharged from the spraying hole near the end on the pressure-feeding side, the spraying hole near the center, and the spraying hole near the tip end was greatly varied, resulting in non-uniform spraying. This is because the pumped air flow is turbulent, the jet tube has a considerable length, and the action of static electricity generated in the jet tube causes the kinetic energy of the sprayed agent to be pumped from the end on the pumping side. Various causes are considered, such as the fact that the distance varies depending on the distance.

Therefore, there has been provided a jet tube in which the discharge amount is corrected (uniformized) by making the areas of the spray holes different.
For example, it is a jet tube in which the spray holes near the end and the tip end on the pumping side where the discharge amount was small in the past were formed large, and the spray holes near the center where the discharge amount was large in the past were made small (for example, (See Japanese Patent Publication No. 60-36353).

In the above-mentioned conventional jet tube, several spray hole groups are provided over the entire length thereof. The area of each spray hole in each spray hole group was uniform, and the areas of the spray holes forming the spray hole groups adjacent to each other were different.

According to the above-mentioned conventional injection pipe, it is said that a uniform discharge amount can be obtained from all the spray holes, and a uniform spray can be realized.

[0007]

However, according to the above-mentioned conventional injection pipe, the area of each spray hole in each spray hole group is made uniform, and the spray holes forming the adjacent spray hole groups are formed. Since the areas were different, there was a large step difference in the amount of spray at the boundary of the spray hole groups. Therefore, it cannot be said that the uniform spraying has been sufficiently realized in practice.

By the way, in order to obtain a completely uniform discharge amount from all of the spray holes, the spray hole group, which is a set of spray holes having the same area, is abolished and the area of each spray hole is sprayed. Ideally, the discharge amount should be strictly corrected by arranging them differently according to the position on the tube. However, doing so is not practical because the work of forming the spray holes in the jet tube main body becomes extremely complicated. Further, the delivery pressure of the spraying agent into the main body of the spray pipe largely changes depending on the operation of the throttle lever of the power spraying machine, that is, the rotation speed of the prime mover, so that a strictly uniform discharge amount from all spraying holes is always obtained. It is practically impossible to get it.

The present invention has been made in view of the above circumstances, and its problem is how to avoid a large step difference in the amount of spraying at the boundary between the spraying hole groups. The point is to take measures.

[0010]

In order to solve the above problems, the present invention employs the following means.

The present invention according to claim 1 relates to a jet tube which simultaneously satisfies the following respective prerequisites.

First, it has a plurality of spray hole groups along the length direction of the jet tube main body.

Second, the area of each spray hole forming each spray hole group is uniform.

Thirdly, the areas of the spray holes of the adjacent spray hole groups are different.

Fourthly, the powdery or granular spraying agent is placed on the pressure-fed air stream and sent into the inside of the jet tube main body, whereby the spraying agent is discharged from each of the spray holes.

According to a first aspect of the present invention, in an injection pipe satisfying the above-mentioned prerequisites, the spraying holes arranged near the boundary between the spraying hole groups adjacent to each other are arranged such that the spraying holes are adjacent to each other. It is characterized in that the spray holes having different areas forming the hole groups are arranged in an alternating manner.

In the case of the injection pipe having a number of boundaries between the spray hole groups, it is not always necessary to adopt the above-mentioned configuration for all the boundaries, and it is also possible to apply it only to the boundaries where the discharge amount is significantly different.

According to a second aspect of the present invention, there is provided an injection pipe which satisfies the first to fourth prerequisites, and further flows in the injection pipe main body in contact with the leeward side edge of the spray hole. The present invention relates to an injection pipe having an air flow guide member that is provided upright so as to face the pressurized air flow.

According to a second aspect of the present invention, in an injection pipe satisfying each of the above prerequisites, the wind direction guide member corresponding to a spray hole located near the boundary between the spray hole groups adjacent to each other is It is characterized in that it is provided by mixing differently different sizes.

Further, in the present invention according to claim 3, the wind direction guide member comprises a bent piece bent at an appropriate angle, and the bent piece has a first flat plate portion and a second flat plate portion having different lengths from each other. It is characterized in that the bending piece is mounted in the injection pipe body with the injection pipe body sandwiched between the flat plate portion and a joining piece which is selectively integrated.

[0021]

[Action]

<Operation of the Invention According to Claim 1> The arrangement of the spray holes located in the vicinity of the boundary between the spray hole groups in the conventional injection pipe is alternated with the spray holes having different areas forming the adjacent spray hole groups. Since the arrangement is mixed in, the discharge amount from the spray holes near the boundary between the spray hole groups in the conventional injection pipe is flattened, and the discharge amount generated at the boundary between the spray hole groups in the conventional spray pipe is Large steps are eliminated.

<Operation of the Invention According to Claim 2> The pressurized airflow sent into the interior of the jet tube body collides with the airflow direction guide member to change its direction and is jetted downward from the spray hole.
Generally, the higher the height of the air flow guide member is, the larger the amount of the spray agent is likely to collide with it. Therefore, the higher the height of the air flow guide member, the greater the discharge amount of the spray agent from the corresponding spray hole. Therefore, if the wind direction guide members with different heights are alternately provided near the boundary between the spray hole groups in the conventional injection pipe, the discharge amount from the spray holes near the boundary between the spray hole groups in the conventional spray pipe is flat. As a result, the generation of a step having a large discharge amount, which has occurred conventionally, is eliminated.

<Operation of the Invention According to Claim 3> The bending piece, which is the wind direction guide member, includes the injection pipe between the flat plate portion of one of the first and second flat plate portions and the joining piece. It is mounted inside the jet tube body with the body sandwiched. The other flat plate portion is in contact with the leeward side edge of the spray hole and faces the compressed airflow flowing in the jet tube main body. Since the lengths of the first or second flat plate portions are different from each other, the rising height of the wind direction guide member in the injection pipe main body is selectively changed depending on which flat plate portion is integrated with the joining piece. You can make them different.

As described above, the height of the wind direction guide member can be changed by changing the mounting method of one type of bending piece, and the discharge amount from each spray hole can be corrected more precisely. it can.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a side view of a spray pipe for a power spreader according to an embodiment of the present invention. The main body 10 of the injection pipe is formed by using a thin, lightweight, and durable flexible material. The wall thickness is, for example, about 0.08 mm, and the material is, for example, a polyethylene resin film or the like. The length L of the injection pipe body 10 is, for example, about 30 m to 50 m,
The diameter when ventilated is about 76 mm. The ventilation leeward end portion 1b of the jet tube body 10 is hermetically closed.

A plurality of spray holes 2 having a predetermined opening area are provided in the lower portion of the jet tube main body 10 along the length direction thereof at predetermined intervals. These spray holes 2 correspond to the planting width of the crop, for example, 30 cm.
It is distributed at equal intervals of about 40 cm.

The injection pipe body 10 has an end portion 1a on the pumping side.
Is connected to a blower vent (not shown) of the main body of the power spreader, which is known per se. Then, along with the operation of the power spraying machine, a spraying agent such as powdery or granular agricultural chemicals is pressure-fed into the interior of the spray tube body 10 by wind pressure, and the spraying agent is discharged downward together with air from each of the spray holes 2. To be made. Therefore, if the jet pipe body 10 is extended and the pumping side end portion 1a and the tip end portion 1b thereof are respectively held at a predetermined height and moved at a constant speed in the paddy field or the like, the length of the jet pipe body 10 is increased. The area corresponding to the product of the length L and the movement distance is efficiently dispersed.

By the way, the arrangement pattern of the spray holes 2 in the conventional injection pipe body 10 is, for example, as follows, as shown in FIG. 40 cm in the main body 10 of the total length of 40 m
Taking the case where the spray holes 2 with intervals are provided as an example, when the pumping side end 10a is 0 m, the hole diameter is approximately 1 near 0 to 4 m.
A large spray hole group A composed of 0 mm spray holes 2a is provided, and 4 to
Around 16 m, a medium distribution hole group B consisting of the distribution holes 2 b having a hole diameter of approximately 8 mm is provided, and near 16 to 28 m, a small distribution hole group C consisting of the distribution holes 2 c having a hole diameter of approximately 6 mm is provided, 28
Around 32 m, the medium distribution hole group B composed of the distribution holes 2 b having a hole diameter of about 8 mm is provided again, and near 32 m to 40 m, the large distribution hole group A composed of the distribution holes 2 a having a hole size of about 10 mm is provided again. It is like this (Actual Kosho 60-36 mentioned above)
353, column 3, line 12 to line 19).

The features of the arrangement pattern of the spray holes 2 in the conventional injection pipe are as follows.

First, the opening areas of the spray holes 2a, 2b, 2c constituting the spray hole groups A, B, C are uniform in each spray hole group A, B, C within the same group. That is. Secondly, the opening areas of the spray holes (2a and 2b, 2b and 2c) of the adjacent spray hole groups (A and B, B and C) are different from each other. Therefore, as shown in FIG. 5, when the vicinity of the boundary of the spray hole groups adjacent to each other (near 16 m in FIG. 5) is seen, the spray pipe body 10 has a hole diameter of M mm (8 mm in FIG. 5) at a certain length. The holes 2b were lined up and then suddenly switched to the arrangement of the spray holes 2c having the hole diameter Nmm (N ≠ M, N = 6 mm in FIG. 5).

On the other hand, in the injection pipe according to the embodiment of the present invention, the arrangement of the spray holes (2b, 2c) located near the boundary between the spray hole groups (for example, B and C) is adjacent to each other. The spray holes having different areas forming the spray hole group are arranged in an array R in which the spray holes are mixed alternately. That is, as shown in FIG. 1 illustrated corresponding to FIG. 5 which is a conventional example,
For example, the arrangement of the spray holes in the vicinity of the boundary between the conventional middle spray hole group B and the small spray hole group C (near the point 16 m from the end on the pumping side of the injection pipe) is such that the middle spray hole group B is adjacent to each other. And the small spray hole group C and the spray holes 2b and 2c having the hole diameters of 8 mm and 6 mm, respectively, are alternately mixed to form an array R.

By doing so, the amount of spray near the boundary of the spray hole groups A, B, C in the conventional injection pipe body 10 is flattened, so that it occurs at the boundary of the conventional spray hole groups A, B, C. The large difference in the amount of spray that was used is eliminated.

Incidentally, the spray holes 2 (2a, 2b, 2c)
Is usually formed in a circular shape, but is not limited to this,
It may be formed in an elliptical shape or a polygonal shape. In this specification, since circular spray holes are assumed, the size of the area is indicated by the hole diameter. Circled numbers in Figures 1 and 5
The spray hole 2 is shown and its diameter is shown.

Next, from the viewpoint of making the spraying amount uniform, an example of a suitable arraying pattern of the spraying holes 2 is shown in Table 1 below.

[0036]

[Table 1] In the example of Table 1, the spray pipe main body having a total length of about 31 m is provided with spray holes at intervals of about 40 cm. The numbers of the spray holes in Table 1 are the numbers of the spray holes arranged from the end portion on the pumping side of the injection pipe toward the tip end side. In the example of Table 1, the numbers 1 to 1
The 18 spray holes (group A) have the same diameter of 7 mm and are number 1
As the spray holes of 9 to 30, those of 8 mm and 7 mm are alternately arranged (R). Further, the spray holes (group B) with the numbers 31 to 58 have the same diameter of 8 mm. Thus, the idea of the present invention appears in the portion of the spray holes located near the boundary between the spray hole groups of numbers 19 to 30.

In addition to the above-mentioned means, the following may be added as a means for more effectively eliminating the large level difference in the amount of spray generated at the boundary between the spray hole groups in the conventional jet tube main body 10.

That is, the height of the wind direction guide member 3 provided inside the injection pipe body 10 is changed.

Conventionally, there has been known an injection pipe provided with a wind direction guide member 3 inside the injection pipe body 10 (see, for example, Japanese Utility Model Publication No. 42-13972). The wind direction guide member 3 is in contact with the leeward side edge of each of the spray holes 2 and is erected so as to be opposed to the compressed airflow flowing in the injection pipe body 10.

The compressed airflow flowing through the inside of the jet tube body 10 is
It collides with the wind direction guide member 3 to change the wind direction, and jets downward from the spray hole 2. Therefore, the spraying agent that is carried under pressure on the air flow is also accompanied by the air flow.
Erupts downward from. Generally, if the height of the wind direction guide member 3 is increased, the amount of the air flow and the spraying agent that collide increases. Therefore, by setting the height of the wind direction guide member 3 to an appropriate height for each of the spray holes 2, it is possible to control the amount of the spraying agent discharged from each spray hole 2 and to make the spraying amount uniform. it can.

In the injection pipe according to this embodiment, the spray holes 2b, 2 located near the boundary between the adjacent spray hole groups (for example, the spray hole group B and the spray hole group C of the conventional example in FIG. 5).
As shown in FIG. 3, the wind direction guide member 3 corresponding to c was provided by alternately mixing different heights (3b, 3c). By doing so, the discharge amount from the spray holes in the vicinity of the boundary between the spray hole groups in the conventional injection pipe is flattened, and the large level difference in the discharge amount that has conventionally occurred is eliminated.

The wind direction guide member 3 is mainly composed of
It is effective when spraying a granular dusting agent.

An example of the structure of the wind direction guide member 3 will be described in detail with reference to FIG.

The wind direction guide member 3 according to this embodiment has a bent piece 4 bent at an appropriate angle. This bent piece 4
Is made thin with a lightweight metal material or synthetic resin.

The bent piece 4 is composed of a first flat plate portion 5 and a second flat plate portion 6 having different lengths (distances H1 and H2 from the bent portion 4a to the outer edges 4b and 4c). For example, the length H1 of the first flat plate portion 5 is 6 mm, and the length H2 of the second flat plate portion 6 is 8 mm, which are different from each other. The angle between the flat plate portions 5 and 6 is 100 ° to 120 °. A mounting hole 7 is formed in each of the flat plate portions 5 and 6.
Two are provided for each. The intervals between the mounting holes 7 in the flat plate portions 5 and 6 are the same, and the sizes thereof are also the same. This is because the joining piece 8 described later can be selectively integrated with any of the flat plate portions 5 and 6.

In order to mount the bending piece 4 in the injection pipe body 10, the joining piece 8 is prepared as another member. The joining piece 8 is formed into a plate shape with an appropriate shape such as a rectangle. Like the bending piece 4, the joining piece 8 is also made thin with a lightweight metal material or synthetic resin.

The joint piece 8 is provided with two protrusions 9. These protrusions 9 fit into the mounting holes 7 provided in the flat plate portions 5 and 6 with appropriate resistance.

Wind direction guide member 3 constructed as described above.
Is mounted in the injection pipe body 10 as follows. First, the bending piece 4 is inserted into the inside of the injection pipe body 10 from the pressure-feeding side end portion 1a. Then, one flat plate portion of the bending piece 4 (for example, the second flat plate portion 6).
Is brought into close contact with the lower portion of the inner surface of the injection pipe body 10 so as to be in contact with the downstream edge of the spray hole 2. At this time, the other flat plate portion (for example, the first flat plate portion 5) is positioned so as to stand upright as a barrier facing the air flow flowing in the injection pipe body 10.

Next, the joining piece 8 is fixed to the second flat plate portion 6 from the outside of the injection pipe body 10. Specifically, the projection 9 of the joining piece 8 is formed by the injection pipe body 1
It is inserted into the mounting hole 7 of the flat plate portion 6 by penetrating through the meat of No. 0. Since an appropriate resistance is given between the protrusion 9 and the mounting hole 7, after the bending piece 4 and the joining piece 8 are joined to each other, they are not accidentally separated.

According to the wind direction guide member 3 having the above-described structure, the work of attaching it to the injection pipe body 10 is easy.

Further, the first and second flat plate portions 5 and 6 have different lengths (standing heights), and moreover, the joining piece 8 is fixed to any of the flat plate portions 5 and 6. Since it is possible, it is possible to easily adjust the magnitude of the wind direction guiding action by selecting which of the flat plate portions 5 and 6 is to be opposed to the air flow of the injection pipe body 10.

Therefore, if a large number of bending pieces 4 of one type are prepared and the mounting method of the bending pieces 4 is alternately changed in the vicinity of the boundary between the spray hole groups in the conventional injection pipe 10, the standing height can be increased. The wind direction guide members 3 having different heights can be easily arranged alternately. The cost is low because only one part is required.

[0053]

EFFECTS OF THE INVENTION The use of the injection pipe according to the present invention eliminates the large difference in the discharge amount that occurs at the boundary between the spray hole groups in the conventional injection pipe.

Further, by using the injection pipe to which the wind direction guide member according to the present invention is added, it suffices to prepare a large number of single parts (bending pieces) and change the mounting method thereof. A large step difference in the discharge amount that occurs at the boundary between the hole groups can be eliminated at low cost.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a main part of an injection pipe according to an embodiment of the present invention, which is shown by being compressed in a length direction in correspondence with an enlarged view of a lower side of FIG. 5 which is a conventional example. Is.

FIG. 2 is an overall schematic side view of a jet tube main body according to an embodiment of the present invention.

FIG. 3 is an explanatory view showing a vertical cross section of a main part of a jet pipe according to another embodiment of the present invention.

FIG. 4 is a fragmentary perspective view showing how to install the wind direction guide member.

FIG. 5 is an explanatory view of a conventional injection pipe.

[Explanation of symbols]

 2a, 2b, 2c Spreading hole 3 Wind direction guide member 4 Bending piece 5 First flat plate portion 6 Second flat plate portion 8 Joining piece 10 Injection pipe body A, B, C Spray hole group R Mixing spray holes with different areas Array part

Claims (3)

[Claims] 1. A plurality of spray hole groups (A, B, C) are provided along a length direction of a jet pipe body (10), and each spray hole group (A, B, C) is formed. Dispersion holes (2a, 2b, 2
The area of c) is uniform, and the spray holes (2a-2b, 2b-) of the adjacent spray hole groups (AB, BC) are adjacent to each other.
2c) having different areas, wherein each of the spray holes (2a, 2b, 2) is formed by placing a powdery or granular spraying agent on a pressure-feeding air stream and sending it into the inside of the spraying tube body (10).
In the case of discharging the spraying agent from c), the arrangement of the spraying holes (2a-2b, 2b-2c) located near the boundary between the spraying hole groups (AB, BC) adjacent to each other, The spray hole groups (AB, B- which are adjacent to each other
C) forming spray holes having different areas (2a-2b, 2b)
-2c) is a jet pipe for a power spreader, which is an array (R) in which staggered mixing is performed. 2. A plurality of spray hole groups (A, B, C) are provided along the length direction of the jet pipe body (10), and each spray hole group (A, B, C) is formed. Dispersion holes (2a, 2b, 2
The area of c) is uniform, and the spray holes (2a-2b, 2b-) of the adjacent spray hole groups (AB, BC) are adjacent to each other.
2c) having different areas, and contacting the leeward side edge of each of the spray holes (2a, 2b, 2c) so as to face the pressure-feeding airflow flowing in the nozzle body (10). The spray holes (2a, 2b, 2a, 2b, Two
In the one for discharging the spraying agent from c), the spraying holes (2a-2b, 2b-2c) corresponding to the spraying holes (2a-2b, 2b-2c) located near the boundary between the spraying hole groups (AB, BC) adjacent to each other. A jet pipe for a power spreader, in which wind direction guide members (3) having different heights are alternately mixed and provided. 3. The wind direction guide member (3) comprises a bent piece (4) bent at an appropriate angle, and the bent piece (4).
Is composed of a first flat plate portion (5) and a second flat plate portion (6) having different lengths from each other, and a joining piece (8) selectively integrated with either flat plate portion (5, 6). The bending piece (4) is inserted between the injection pipe body (10) and the injection pipe body (1).
The spray tube for a power spreader according to claim 2, wherein the injection tube is mounted in the space 0).