JP5378019B2 - Foreign matter removal device for agricultural waterway and foreign matter removal filter for agricultural waterway - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foreign matter removing apparatus for an agricultural irrigation canal and a foreign matter removing filter for an agricultural irrigation canal each removing foreign matters mixed in irrigation water and capable of suppressing a decrease of irrigation requirement to be supplied. <P>SOLUTION: This foreign matter removing apparatus 10 for an agricultural irrigation canal includes passing irrigation water flowing from an inflow part 16 through a filter 22 from the inside to the outside followed by leading to an outflow part 18. As a result of this, foreign matter mixed in the irrigation water cannot pass the filter 22 and stays inside the filter 22, and only irrigation water from which foreign matter are removed can pass through the filter 22 and is led to the outflow part 18. Furthermore, even when an amount of foreign matter which is caught with the filter 22 gradually increases, and the outflow part 18 of the filter 22 is clogged up with the foreign matter, irrigation water which passes through a section which is not clogged up with the foreign matter in the filter 22 goes through a canal F and is led to the outflow part 18. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  TECHNICAL FIELD The present invention relates to an agricultural waterway foreign matter removing device and an agricultural waterway foreign matter removing filter, and more particularly, for example, used in a water supply facility that supplies water taken from an agricultural waterway to a farm to remove foreign matter mixed in the water. The present invention relates to a foreign matter removal apparatus for agricultural waterways and a foreign matter removal filter for agricultural waterways.

  An example of a water supply facility that supplies water taken from a conventional agricultural waterway to a farm field is disclosed in Patent Document 1. In the automatic water faucet of Patent Document 1, the water flowing into the automatic water faucet from the agricultural water channel is supplied to the field from the main water supply valve and the float type automatic water supply valve that branches to the side of the valve body. Normally, the main valve element is fully closed, and the float-type automatic water supply valve that opens and closes as the float moves up and down automatically repeats water supply and water stop, so that the field is kept at a predetermined water level. Be drunk. Further, when the paddy field is scraped, the main valve body is fully opened, so that water is supplied to the field from both the main water supply valve and the float type automatic water supply valve.

JP 2006-314249 A [A01G 25/00]

  Foreign water such as grass and branches is often mixed in the water flowing through the agricultural water channel. In the technique of Patent Document 1, the diameter of the float type automatic water supply valve is slightly increased in order to prevent malfunction due to foreign material in the water. It is set large. However, in the technique of Patent Document 1, no specific measures are taken to remove foreign matters mixed in water, and the malfunction is caused in the float type automatic water supply valve by the foreign matters. is there.

  On the other hand, in order to avoid this, the inlet of the float type automatic water supply valve that branches from the valve body to the side is covered with a filter, and foreign matters mixed in the water flowing into the float type automatic water supply valve at the inlet are removed. It is possible to do. However, in this case, when the filter is clogged due to adhesion of foreign matter, the water that passes through the filter is stagnated, and the amount of water that is supplied from the float type automatic water supply valve to the field is significantly reduced.

  Therefore, a main object of the present invention is to provide a novel foreign matter removing apparatus for agricultural waterways and a foreign matter removing filter for agricultural waterways.

  Another object of the present invention is to provide an agricultural waterway foreign matter removing device and an agricultural waterway foreign matter removing filter capable of removing foreign matters mixed in the water and suppressing a decrease in the amount of supplied water. That is.

  The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses and description of capture indicate correspondence with the embodiments described later in order to help understanding of the present invention, and do not limit the present invention.

A first aspect of the present invention is an agricultural water channel foreign matter removing apparatus for removing foreign matter mixed in the water used in a water supply facility for supplying water taken from an agricultural water channel to a farm. An inflow portion for allowing the water to flow in, an outflow portion formed on the side wall of the housing and for allowing the water to flow out of the housing, and an outflow portion provided inside the housing for supplying the water between the inner surface of the housing A foreign matter removing apparatus for agricultural waterways, comprising a filter having a side wall forming a water passage for leading to the waterway, wherein the water passage is formed by an inner side surface of the housing and an outer side surface of the filter spaced apart from each other by a constant or substantially constant interval. It is.

  In the first invention, the agricultural water channel foreign matter removing device (10) includes a housing (12) into which water taken from the agricultural water channel (102) flows, and a filter (22) provided inside the housing, Foreign matter mixed in the water is removed. The housing includes a side wall (14) formed, for example, in a cylindrical shape, and an outflow portion (18) for allowing water in the housing to flow out to the outside is formed on the side wall. In addition, an inflow portion (16) for allowing water to flow into the housing is formed at the lower end of the housing, for example. The filter includes a side wall (24) formed in a cylindrical shape, for example, and a water passage (F) for leading water to the outflow portion is formed between the inner side surface of the housing and the outer side surface of the filter. Is done. In such an agricultural waterway foreign matter removing apparatus, the water flowing in from the inflow portion passes through the filter from the inside to the outside and is led to the outflow portion. For this reason, the foreign matter mixed in the irrigation water cannot pass through the filter and stays inside the filter, and only the irrigation water from which the foreign matter has been removed passes through the filter and is led to the outflow portion. Even if the amount of foreign matter trapped in the filter gradually increases and the outflow portion side of the filter is clogged with foreign matter, the water that has passed through the portion of the filter that is not clogged with foreign matter passes through the water passage. And is led to the outflow part.

  According to 1st invention, the foreign material mixed in water can be removed. Further, even if the outflow portion side of the filter is clogged with foreign matter, the amount of water flowing out of the housing from the outflow portion does not decrease.

A second invention is dependent on the first invention, and the side wall of the filter is formed in a cylindrical shape.

In the second invention, the side wall (24) of the filter (22) is formed in a cylindrical shape. In the embodiment, the side wall of the filter is formed in a cylindrical shape having an outer diameter smaller than the inner diameter of the side wall (14) of the housing (12). For this reason, even if the outflow part (18) side in a filter is clogged with a foreign material, irrigation water can pass through a filter from the site | part which is located in the other side of an outflow part in the said filter as much as possible. .

The third invention is dependent on the first or second invention, and the housing has an opening for discharging foreign matter to the outside of the housing, and the side wall of the filter faces the opening from the inflow portion. And a slit having an open end on the opening side is formed.

In the third invention, the housing (12) is provided with an opening (20) for discharging foreign matter to the outside of the housing. In addition, a plurality of slits (28) are formed in the side wall (24) of the filter (22), for example, along the circumferential direction at intervals in the circumferential direction. The slit extends in a direction from the inflow portion toward the opening in the housing, and the end on the opening side is open.

According to the third aspect of the invention, the foreign matter remaining inside the filter can be easily discharged from the opening to the outside of the housing.

A fourth invention is dependent on the third invention, and the opening is provided with a valve body for closing the opening from the outside of the housing.

In the fourth invention, the opening (20) is formed in the valve seat (116) and can be opened and closed from the outside of the housing (12) by the valve body (126). Therefore, when the opening is opened, the water that has flowed into the housing (12) from the inflow portion (16) is led out not only to the outflow portion (18) but also to the opening.

According to the fourth aspect of the present invention, the foreign matter remaining inside the filter can be swept out of the housing by the irrigation water led out to the opening.

5th invention is provided in the inside of the housing into which the water taken from the agricultural water channel flows in the agricultural water channel foreign material removal apparatus of any one of 1st thru | or 4th invention, and mixes in the water flowing out from the said housing. A foreign matter removal filter for agricultural waterways for removing foreign matter, and a side wall that forms a water passage between the inner surface of the housing and a side wall that extends in the axial direction of the side wall and has one end thereof It is a foreign matter removal filter for agricultural waterways provided with the opened slit.

In the fifth invention, the filter (22) is provided inside the housing (12) into which the water taken from the agricultural water channel (102) flows and removes foreign matters mixed in the water flowing out from the housing. . The filter includes a side wall (24) formed in a cylindrical shape, for example, and a water passage (F) for leading water to the outflow portion is formed between the inner side surface of the housing and the outer side surface of the filter. Is done. In addition, for example, a plurality of slits (28) arranged at intervals in the circumferential direction are formed on the side wall of the filter over the entire circumference thereof. The slit extends in the axial direction of the side wall of the filter, and one end thereof is open. In the embodiment, the slit extends in the direction from the inflow portion (16) in the housing toward the opening (20), and the end on the opening side is open.

  According to the present invention, it is possible to remove foreign matters mixed in the water. Even if the outflow portion side of the filter is clogged with foreign matter, the water that has passed through the portion of the filter that is not clogged with foreign matter is led to the outflow portion through the water passage, so that the water that flows out of the outflow portion The amount does not decrease.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is an illustration figure which shows the water supply facility for underground irrigation using the foreign matter removal apparatus for agricultural water of one Example of this invention. It is sectional drawing which shows the water supply valve | bulb of FIG. It is sectional drawing which shows the state which has opened the opening part of the water supply valve | bulb of FIG. It is a perspective view which shows the filter of FIG. It is an illustration figure which shows the flow path of the water in the water supply valve | bulb of FIG. It is an illustration figure which shows the flow path of the water in the water supply valve | bulb of FIG. It is an illustration figure which shows the flow path of the water in the water supply valve | bulb of FIG. It is a perspective view which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is a perspective view which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is sectional drawing which shows a mode that the foreign material removal apparatus for agricultural water of FIG. 9 was provided in the water supply valve. It is a perspective view which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is a perspective view which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is sectional drawing which shows a mode that the foreign material removal apparatus for agricultural water of FIG. 12 was provided in the water supply valve. It is a perspective view which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is sectional drawing which shows a mode that the foreign material removal apparatus for agricultural water of FIG. 14 was provided in the water supply valve. It is a perspective view which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is sectional drawing which shows a mode that the foreign material removal apparatus for agricultural water of FIG. 16 was provided in the water supply valve. It is an illustration figure which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is an illustration figure which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is an illustration figure which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is an illustration figure which shows the flow path of the water in the filter of FIG. It is a perspective view which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is a top view which shows the filter of FIG. It is an illustration figure which shows a mode that the filter of FIG. 22 was fixed in the housing. It is sectional drawing which shows a mode that the foreign material removal apparatus for agricultural water of FIG. 22 was provided in the water supply valve. It is a perspective view which shows the filter of the foreign material removal apparatus for agricultural water of another Example of this invention. It is a top view which shows the filter of FIG. It is sectional drawing which shows a mode that the foreign material removal apparatus for agricultural water of FIG. 22 was provided in the water supply valve.

  Referring to FIG. 1, an agricultural waterway foreign matter removing device (hereinafter simply referred to as “foreign matter removing device”) 10 according to an embodiment of the present invention includes a housing 12 and a filter 22 provided in the housing 12. And is used in a water supply facility for supplying the water taken from the agricultural water channel 102 to the field, and removes foreign matters mixed in the water. However, the “foreign matter” in this embodiment includes not only garbage mixed in the irrigation water but also grasses, branches, pebbles mixed in the irrigation water, aquatic organisms inhabiting the irrigation water, or the like. .

  As shown in FIG. 1, in this embodiment, the foreign matter removing apparatus 10 includes a water supply valve 106 of an underground irrigation water supply facility 100 for supplying water taken from an agricultural water channel 102 to a perforated pipe 104 embedded in the ground. Applied to the water supply valve 106 and the water supplied to the perforated pipe 104 from the water supply pipe 106 through the water outlet pipe 114, but the present invention is not limited to this.

  As shown in FIG. 2, the water supply valve 106 includes a main body 108 having a cylindrical shape. In this embodiment, a lower region L of the water supply valve 106 separated by the main body 108 and a valve seat 116 described later is a housing 12. The main body 108 in the lower region L functions as a side wall (hereinafter referred to as “first side wall”) 14 in the housing 12.

  The main body 108 is made of a synthetic resin such as polyvinyl chloride, and the lower end thereof opens vertically downward. The lower end opening 108a of the main body 108 has a receiving port shape whose diameter is increased stepwise from the inner peripheral surface of the main body 108, and a water intake pipe 110 that guides the water taken from the agricultural water channel 102 into the water supply valve 106 there. Is connected. That is, the lower end opening 108 a of the main body 108 functions as the inflow portion 16 for allowing the water taken from the agricultural water channel 102 to flow into the housing 12.

  A first water passage 112 is provided above the lower end opening 108 a of the main body 108. The 1st water flow hole 112 is a hole which penetrates the main body 108 in the thickness direction, and the diameter is 32 mm, for example. A water discharge pipe 114 is connected to the first water passage hole 112, and the water that has flowed out of the housing 12 from the outflow portion 18 passes through the water discharge pipe 114 and a water level adjuster (not shown). And supplied from the perforated tube 104 to the field. That is, the 1st water flow hole 112 is formed in the 1st side wall 14 of the housing 12, and functions as the outflow part 18 for making the water in the said housing 12 flow out outside.

  A valve seat 116 that divides the upper region H and the lower region L of the water supply valve 106 is integrally formed above the first water passage hole 112 in the main body 108. Further, a second water passage hole 118 that communicates the upper region H and the lower region L is formed at a substantially central portion of the valve seat 116. The 2nd water hole 118 has a diameter larger than the 1st water hole 112, and the diameter is 75 mm, for example.

  As shown in FIGS. 2 and 3, the second water passage hole 118 can be opened and closed by a valve body 126 described later, and functions as an opening 20 for discharging foreign matter accumulated in the filter 22 to the outside of the housing 12. To do. In addition, a plurality of water outlet windows 120 penetrating in the thickness direction are formed at intervals above the valve seat 116 in the main body 108 in the thickness direction over the entire circumference, and the second water passage holes 118 are formed. From the water supply valve 106 flows out of the water supply valve 106 through the water discharge window 120.

  Returning to FIG. 2, the upper end of the main body 108 is opened vertically upward, and a bearing 122 is provided in the upper end opening 108 b. The bearing 122 is formed in a disk shape having a diameter substantially equal to the outer diameter of the main body 108, and a valve shaft 124 is screwed into a substantially central portion thereof.

  A valve body 126 is provided at the lower end of the valve shaft 124. The valve body 126 is formed in a disc shape that can seal the second water passage hole 118. Further, a handle 128 is provided at the upper end of the valve shaft 124. By turning the handle 128, the valve shaft 124 and the bearing 122 are screwed together, and the valve body 126 moves up and down in the axial direction of the main body 108. To do. It is preferable that an elastic material such as ethylene propylene rubber is provided on the lower surface of the valve body 126 and the upper surface of the valve seat 116 so that the valve body 126 and the valve seat 116 can contact each other without a gap.

  As described above, the filter 22 is provided inside the housing 12.

  As shown in FIGS. 2 and 4, the filter 22 includes a side wall (hereinafter, referred to as “second side wall”) 24 made of a metal such as stainless steel. The second side wall 24 is formed in a cylindrical shape that extends coaxially with the first side wall 14 of the housing 12 and has an outer diameter smaller than the inner diameter of the first side wall 14. For example, the second side wall 24 has a length of 40 mm and an outer diameter of 85 mm. Therefore, the inner surface, that is, the inner surface of the first side wall 14 of the housing 12 and the outer surface, that is, the outer surface, of the second side wall 24 of the filter 22 are spaced apart from each other. Between the filter 22 and the outer surface of the filter 22, a water passage F for leading the water to the outflow portion 18 is formed.

  The lower end portion of the second side wall 24 is formed with a locking portion 26 that protrudes radially outward over the entire circumference. The locking part 26 is a part that prevents water containing foreign matter from entering the water passage F without passing through the filter 22 and fixes the position of the filter 22 in the housing 12. Is sandwiched between the lower end opening 108a of the main body 108 and the intake pipe 110 described above.

  The second sidewall 24 is formed with a plurality of slits 28 that are arranged at intervals in the circumferential direction over the entire circumference. The slit 28 is formed in a strip shape extending in the axial direction of the second side wall 24, and its upper end is opened. In other words, the slit 28 extends in the direction from the inflow portion 16 to the opening 20 in the water supply valve 106, and the end on the opening 20 side is open.

  With reference to FIGS. 5 and 6, in such a foreign matter removing apparatus 10, the water taken from the agricultural water channel 102 flows into the housing 12 from the inflow portion 16 and flows out from the outflow portion 18 to the outside of the housing. To do.

  As shown in FIG. 5, the water that has flowed in from the inflow portion 16 passes through the slit 28 from the inside to the outside of the filter 22 and is led to the outflow portion 18. For this reason, when foreign matter is mixed in the irrigation water flowing in from the inflow portion 16, the foreign matter mixed in the irrigation water cannot pass through the slit 28 and remains inside the filter 22 to remove the foreign matter. Only the used water passes through the slit 28 and is led to the outflow portion 18.

  When the amount of foreign matter captured by the filter 22 gradually increases, the slit 28 located on the outflow portion 16 side is clogged with foreign matter. At that time, as shown in FIG. 6, the water that has passed through the slit 28 that is not clogged with foreign substances is led to the outflow portion 18 through the water passage F.

  As described above, according to this embodiment, foreign matters can be removed from the water supplied from the water supply valve 106 to the outlet pipe 114. Further, even if the filter 22 is clogged with foreign matter, the amount of water supplied from the water supply valve 106 to the drain pipe 114 does not decrease.

  Furthermore, according to this embodiment, the second side wall 24 of the filter 22 is formed in a cylindrical shape that extends coaxially with the first side wall 14 of the housing 12. Since the inner surface of the housing 12 and the outer surface of the filter 22 are spaced apart from each other, the water passing through the water passage F flows out without being obstructed by the filter 22 in which the slit 28 is clogged with foreign matter. 18 can be reached. Therefore, the water that passes through the water passage F can be smoothly led out to the outflow portion 18. In addition, since the second side wall 24 of the filter 22 is formed in a cylindrical shape, the water is opposite to the outflow portion 18 in the filter even if the slit 28 on the outflow portion 18 side of the filter 22 is clogged with foreign matter. It is possible to pass through the filter 22 from the slit 28 that is located at the position where it is hardly clogged.

  According to this embodiment, the opening 20 is provided in the housing 12. For this reason, the foreign matter staying inside the filter 22 can be discharged from the opening 20 to the outside of the housing 12. Further, the slit 28 of the filter 22 extends in a direction from the inflow portion 16 toward the opening portion 20, and the opening 20 side end is opened. For this reason, when the foreign matter is discharged from the opening 20, it can be easily discharged without being obstructed by the slit 28.

  Furthermore, according to this embodiment, the opening 20 is formed in the valve seat 116 and can be opened and closed by the valve body 126. Therefore, by opening the opening 20, the water that has flowed into the housing 12 from the inflow portion 16 can be led out not only to the outflow portion 18 but also to the opening 20. Here, as shown in FIG. 7, the water that has flowed in from the inflow portion 16 passes through the inside of the filter 22 and is led out to the opening portion 20. Accordingly, the foreign water remaining inside the filter 22 can be swept out of the housing 12 by the irrigation water led out to the opening 20.

  In the above-described embodiment, the lower end portion of the second side wall 24 of the filter 22 is formed with the locking portion 26 that protrudes outward in the radial direction over the entire circumference, but it is necessary to be limited to this. Instead, for example, as shown in FIG. 8, a plurality of locking portions 26 arranged at intervals in the circumferential direction of the second side wall 24 may be formed. Further, for example, as shown in FIGS. 9 and 10, a ring-shaped fixing member 30 having an outer diameter substantially equal to the lower end opening 108a of the main body 108 is sandwiched between the lower end opening 108a of the main body 108a and the intake pipe 110, You may couple | bond the said fixing member 30 and the connection hole 32 formed in the lower end part of the 2nd side wall 24 of the filter 22 with wires 34, such as a wire, rubber | gum, or a string. In this case, the fixing member 30 fixes the position of the filter 22 in the housing 12 and further prevents water containing foreign matter from entering the water channel F without passing through the filter 22.

  Furthermore, in the above-described embodiment, the end portion on the opening 20 side of the slit 28 of the filter 22 is opened, but it is not necessary to be limited to this. For example, as shown in FIG. 11, a slit 28 extending in the axial direction of the second side wall 24 may be formed in a portion excluding both ends of the second side wall 24. In this case, since the shape of the filter 22 is stable, it is suitable when the shape of the second side wall 24 of the filter 22 is deformed, as will be described later.

  Furthermore, in the above-described embodiment, the second side wall 24 of the filter 22 has a slit 28 for capturing the foreign matter mixed in the irrigation water and leading the water from which the foreign matter has been removed to the outflow portion 18. Although formed, it need not be limited to this.

  For example, in the modified embodiment shown in FIGS. 12 and 13, the filter 22 includes an annular portion 36, a rod-like portion 38, and a spherical portion 42. The annular portion 36 is sandwiched between the lower end opening 108a of the main body 108 and the upper end of the intake pipe 110, and is a part for fixing the position of the filter 22 in the housing 12, and the above-described fixing ring 30 and It is formed in an O (O) ring shape having substantially the same diameter. A plurality of rod-like portions 38 are formed on the inner side of the annular portion 36 so as to be arranged at intervals in the circumferential direction over the entire circumference. The rod-shaped portion 38 is formed in a columnar shape that protrudes upward from the annular portion 36, and a space 40 is formed between the rod-shaped portion 38 and another adjacent rod-shaped portion 38. A spherical portion 42 is formed at the tip of the rod-shaped portion 38. The spherical portion 42 is formed in a spherical shape having a slightly larger diameter than the rod-shaped portion 38. The rod-shaped portion 38 and the spherical portion 42 function as the second side wall 24 in the filter 22 and capture foreign matters mixed in the water. Further, the water from which the foreign matter has been removed passes through the filter 22 from the space 40 and is led to the outflow portion 18.

  Further, for example, in the modified embodiment shown in FIG. 14, the second side wall 24 of the filter 22 is made of a plate material such as stainless steel, aluminum, alloy, titanium or the like, in which a perforation 44 penetrating in the thickness direction is processed on the entire surface, so-called punching metal. It is formed by bending into a cylindrical shape. As shown in FIG. 15, such a filter 22 is fixed inside the housing 12 by connecting an appropriate perforation 44 positioned at the lower end of the second side wall 24 and the fixing member 30 described above with a wire 34. Is done.

  Further, for example, in the modified embodiment shown in FIG. 16, the second side wall 24 of the filter 22 is formed by knitting a thin metal wire such as a wire in a lattice shape or a net shape. For this reason, a plurality of gaps 46 are formed in the second side wall 24. As shown in FIG. 17, such a filter 22 is fixed inside the housing 12 by connecting an appropriate gap 46 positioned at the lower end of the second side wall 24 and the above-described fixing member 30 with a wire 34. Is done.

  In each of the above-described embodiments, the foreign matter removing apparatus 10 is applied to the water supply valve 106 of the underground irrigation water supply facility 100, but is not limited to this, and the water taken from the agricultural waterway 102 is not limited to this. As long as it is a water supply facility that supplies a farm field, it can be applied to an appropriate location. For example, although not shown, the foreign matter removing device 10 can be provided at a branch point from the agricultural water channel 102 to the intake pipe 114. In this case, the portion into which the irrigation water in which foreign matter is mixed flows in as the housing 12 at the branch point.

  In each of the above-described embodiments, the valve body 126 is moved upward to open the opening 20, and foreign matter remaining inside the filter 22 is discharged from the opening 20, but this is not limitative. There is no need to be done. For example, although not shown in the figure, an inspection port that can be opened and closed is formed separately at a position where foreign matter staying inside the filter 22 can be discharged, and the inside of the filter 22 is manually opened from the inspection port. The remaining foreign matter may be removed.

  Further, in each of the above-described embodiments, the filter 22 is formed in a cylindrical shape from a metal such as stainless steel, but is not limited thereto.

  For example, the filter 22 may be formed in a cylindrical shape by an elastic body such as rubber. In this case, as shown in FIG. 18, the shape of the filter 22 can be appropriately deformed. For example, the shrunken filter 22 is disposed inside the housing 12 through the opening 20, and the housing 12 It can also be restored internally.

  Further, for example, an easy-reducing slit may be formed in the filter 22 and the second side wall 24 may be formed in a cylindrical shape having a substantially C-shaped cross section in the axial direction. Here, the easy-diameter slit is a cut for easily reducing the diameter of the second side wall 24 of the filter 22, and the shape and width thereof are not particularly limited. Therefore, it may have no width, that is, it may be in contact with both ends of the cut. In this case, as shown in FIG. 19, since the second side wall 24 of the filter 22 can be enlarged or reduced in diameter, for example, the reduced diameter filter 22 is disposed inside the housing 12 from the opening 20 and The diameter can be increased inside the housing 12.

  However, in FIGS. 18 and 19, the filter 22 in the embodiment of FIG. 11 is illustrated, but the same applies to the filters 22 in other embodiments.

  Further, for example, as shown in FIG. 20, the second side wall 24 of the filter 22 may be formed in a semi-cylindrical shape. Protrusions 48 are integrally formed at both ends of the filter 22 in the circumferential direction of the second side wall 24. The protrusion 48 is a part that prevents water from entering the water passage F through the gap between the first side wall 14 and the second side wall 24 without passing through the filter 22, and both ends in the circumferential direction of the second side wall 24. Projecting radially outward from. In this case, as shown in FIG. 21, even if the slit 28 arranged on the outflow portion 16 side is clogged with foreign matter, the slit 28 not clogged with foreign matter adjacent to the slit 28 is formed. The water that has passed through is led out to the outflow portion 18 through the water passage F. Similarly, although not shown, the second side wall 24 having a circumferential length of 1/4 or 3/4 of the cylinder can be formed.

  20 and FIG. 21, the filter 22 in the embodiment of FIG. 4 is illustrated, but the same applies to the filters 22 in other embodiments.

  Furthermore, in each of the above-described embodiments, the water supply valve 106 includes the locking portion 26 provided at the lower end portion of the second side wall 24 of the filter 22 and the fixing member 30 connected to the lower end portion of the second side wall 24. The position of the filter 22 in the housing 12 is fixed by being sandwiched between the lower end opening 108a of the main body 108 and the water intake pipe 110, but it is not necessary to be limited to this.

  For example, in the modified embodiment shown in FIGS. 22 to 25, the filter 22 includes a second side wall 24 made of a synthetic resin such as polyethylene. The second side wall 24 includes a first semi-cylindrical portion 50 and a second semi-cylindrical portion 52, and is formed in a cylindrical shape extending coaxially with the first side wall 14 of the housing 12.

  However, the “semi-cylinder” here does not define whether or not the length in the circumferential direction is equal to ½ of the cylinder, but the first semi-cylindrical portion 50 and the second semi-cylindrical portion 52 are only used. This means that the cylindrical second side wall 24 is formed.

  As shown in FIGS. 22 and 23, the first semi-cylindrical portion 50 is formed in a substantially semi-cylindrical shape, and its outer diameter is set smaller than the inner diameter of the first side wall 14 of the housing 12, for example.

  The first semi-cylindrical portion 50 is formed with a plurality of slits 28 arranged at intervals in the circumferential direction. The slit 28 is formed in a strip shape extending in the axial direction of the second side wall 24, and its upper end is opened.

  Further, the first semi-cylindrical portion 50 is formed with a contact portion 54 protruding outward in the radial direction. The contact portion 54 is a portion that abuts against the first side wall 14 of the housing 12, and the outer edge diameter is set to be substantially equal to the inner diameter of the first side wall 14 of the housing 12 to such an extent that it can be disposed inside the housing 12. The The contact portion 54 has a shape that surrounds the outflow portion 18 (the first water passage hole 112), so that the water does not pass through the filter 22 and the first side wall 14 and the second side wall. Intrusion into the water channel F from the gap with 24 is prevented. For example, the contact portion 54 extends in the circumferential direction at the lower end portion of the first semi-cylindrical portion 50, and extends in the vertical direction at both circumferential ends of the first semi-cylindrical portion 50, and is formed in a substantially U shape in plan view. Is done.

  Further, the first semi-cylindrical portion 50 is formed with a protrusion 56 protruding outward in the radial direction. The protruding portion 56 is formed in a rectangular plate shape, and protrudes outside the outer edge of the contact portion 54 so that the protruding portion 56 can be inserted into the outflow portion 18 (first water passage hole 112) of the housing 12. For example, the protruding portion 56 is disposed at a substantially center in the circumferential direction of the first semi-cylindrical portion 50 and at an upper portion of the contact portion 54.

  The second semi-cylindrical part 52 is formed in a substantially semi-cylindrical shape having a larger diameter than the first semi-cylindrical part 50 and having a slightly larger central angle. For this reason, as will be described in detail later, when the filter 22 is arranged inside the housing 12 and the contact portion 54 is brought into contact with the first side wall 14 of the housing 12, a part of the second semi-cylindrical portion 52 becomes part of the housing 12. The first side wall 14 is pushed and bent. For example, on the inner surface of the second semi-cylindrical portion 52, a plurality of ribs 58 extending in the vertical direction and arranged at a predetermined interval in the circumferential direction are formed. Is increased.

  Further, the first semi-cylindrical portion 50 and the second semi-cylindrical portion 52 are provided integrally and continuously with an inner smooth surface, and thereby, at the boundary portion between the contact portion 54 and the second semi-cylindrical portion 52. Is formed with a recessed portion 60 recessed inward in the radial direction.

  When such a filter 22 is disposed inside the housing 12, the contact portion 54 provided in the first semi-cylindrical portion 50 abuts on the first side wall 14 of the housing 12, and the second semi-cylindrical portion 52 is disposed on the housing 12. Abuts on the first side wall 14. Then, the second semi-cylindrical part 52 that receives the reaction force of the contact part 54 is pushed into the first side wall 14 of the housing 12 and bent. Then, as shown in FIGS. 24 and 25, the remaining part of the second semi-cylindrical portion 52 excluding the bent portion is accommodated in the housing 12 by accommodating the bending of the second semi-cylindrical portion 52 in the recess 60. The first side wall 14 is closely attached.

  According to this embodiment, the filter 22 can be fixed in the housing 12 by the tension of the filter 22 itself. Therefore, for example, even when an error occurs in the outer diameter of the filter 22 when it is molded, the filter 22 can be disposed inside the housing 12 and the filter 22 in the housing 12 can be fixed. it can.

  Further, in this embodiment, as shown in FIG. 25, the protrusion 56 provided on the first semi-cylindrical portion 50 of the filter 22 is inserted into the outflow portion 18 (first water passage 112) of the housing 12, Thus, the filter 22 is locked to the housing 12. Therefore, even if the intake pipe 110 is not inserted to the receiving port portion of the inflow portion 16 (the lower end opening 108a of the main body 108) of the housing 12, the filter 22 does not fall and further from the inflow portion 16 to the housing 12 The filter 22 does not rotate in the circumferential direction due to the irrigation water flowing in.

  In this embodiment, the first semi-cylindrical portion 50 is provided with the projection 56, but it is not necessary to be limited to this. As shown in FIGS. 26 and 27, the protrusion 56 may not be provided in the first semi-cylindrical portion 52 of the filter 22. Even in this case, as shown in FIG. 28, the filter 22 is dropped by placing the second side wall 24 of the filter 22 on the upper end of the intake pipe 110 connected to the inflow portion 16 of the housing 12. Can be prevented.

  Further, in this embodiment, the outer diameter of the first semi-cylindrical portion 50 is set smaller than the inner diameter of the first side wall 14 of the housing 12, but it is not necessary to be limited to this. If the filter 22 can be disposed in the housing 12, the outer diameter of the first semi-cylindrical portion 50 may be set equal to the inner diameter of the first side wall 14, and further set larger than the inner diameter of the first side wall 14. May be. Although illustration is omitted, for example, when the outer diameter of the first semi-cylindrical portion 50 is set to be larger than the inner diameter of the first side wall 14 of the housing 12, the second side wall 24 of the filter 22 has a center smaller than 180 °. It is preferable to form the first semi-cylindrical part 50 having an angle and the second semi-cylindrical part 52 having a central angle larger than 180 °.

  Further, in this embodiment, a recess 60 is formed at the boundary portion between the contact portion 54 and the second semi-cylindrical portion 52, and the bent portion of the second semi-cylindrical portion 52 is accommodated in the recess 60. It is not necessary to be limited to this. For example, although illustration is omitted, by bending the second semi-cylindrical part 52 pushed into the first side wall 14 as it is, the remaining part of the second semi-cylindrical part 52 excluding the bent part is removed. The first side wall 14 of the housing 12 may be closely attached. Even in this case, the filter 22 can be fixed in the housing 12 by the tension of the filter 22 itself.

  Note that the specific numerical values such as the diameter and height described above are merely examples, and can be appropriately changed as necessary.

DESCRIPTION OF SYMBOLS 10 ... Foreign substance removal apparatus for agricultural waterways 12 ... Housing 14, 24 ... Side wall 16 ... Inflow part 18 ... Outflow part 20 ... Opening part 22 ... Filter 28 ... Slit 100 ... Underground irrigation water supply facility 102 ... Agricultural waterway 106 ... Water supply valve F ... waterway

Claims (5)

A foreign matter removing apparatus for agricultural waterways used for water supply facilities that supply water taken from agricultural waterways to a farm, and for removing foreign matters mixed in the water.
housing,
An inflow portion for allowing the water to flow into the housing;
An outflow portion formed on a side wall of the housing and for allowing the water to flow out of the housing; and provided inside the housing and leading the water to the outflow portion between an inner surface of the housing. a filter having a side wall that forms a water passage for,
The agricultural water channel foreign matter removing apparatus, wherein the water channel is formed by the inner surface of the housing and the outer surface of the filter that are spaced apart from each other by a constant or substantially constant interval . The side wall of the filter is formed in a cylindrical shape, irrigation ditches for foreign matter removing apparatus according to claim 1. The housing is formed with an opening for discharging the foreign matter to the outside of the housing.
The side wall of the filter, and extends toward the opening, and a slit end of the opening side is open is formed, according to claim 1 or 2 irrigation ditches for foreign matter removing apparatus according. The agricultural body channel foreign matter removing device according to claim 3 , wherein the opening portion is provided with a valve body for closing the opening portion from the outside of the housing. The foreign matter removal apparatus for agricultural waterways according to any one of claims 1 to 4 , wherein the foreign water mixed in the water flowing out from the housing is provided inside the housing into which the water taken from the agricultural waterway flows. A foreign matter removal filter for agricultural waterways,
An agricultural waterway foreign matter removal filter comprising: a side wall that forms a water passage between the housing and an inner side surface; and a slit that is formed in the side wall and extends in the axial direction of the side wall and is open at one end thereof.

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