JP6066699B2 - Agricultural diversion valve and diversion water supply system using the diversion valve - Google Patents

Description

  The present invention relates to an agricultural diversion valve used for diverting water from a water supply pipe serving as an irrigation channel for irrigation. More specifically, the present invention relates to an agricultural diversion valve capable of discharging air that has entered the water supply pipe in a closed state. Furthermore, this invention relates to the diversion water supply system for agriculture which uses such a diversion valve.

  In cold districts such as Hokkaido, a pipeline, that is, a water supply pipe is used as a line for supplying agricultural water, and the necessary water for agriculture is supplied to each field by opening and closing the diversion valve attached to this water supply pipe. It has become. By the way, when the harvesting of crops is finished and agricultural water is no longer needed, the main plug of the water channel (water supply pipe) is temporarily closed to prevent freezing, and water in the water supply pipe is dropped. Then, in the spring of the following year, it is opened again and irrigation is carried out. However, since air has entered the water supply pipes that have been shut off and the water diversion valves are also closed, when the irrigation is started the next year, even if the main plug of the water supply pipe is opened as it is, Water does not flow well in the tube. Therefore, by opening each diversion valve attached to the water supply pipe slightly before opening the main plug, air inside the pipe can be discharged from the diversion valve at the time of opening, enabling smooth water flow. Yes. An example of such a water diversion valve is disclosed in, for example, Japanese Utility Model Laid-Open No. 55-115353 and Japanese Patent No. 4617412.

  However, a large number of diversion valves are provided over a wide range of fields, and it is very laborious to open all of these valves before opening the main plug. In addition, even if the water in the water supply pipe is discharged and water can be passed safely, the water will continue to flow out of the water diverter valve as it is, so close the diverter valve as soon as water flow is confirmed. There is a need. However, as described above, since the installation of the diversion valve is wide-ranging, a considerable amount of manpower is required to quickly perform this operation.

Japanese Utility Model Publication No. 55-115353 Japanese Patent No. 4617412

  This invention is made | formed in view of the problem of the said prior art, and makes it the subject to provide the diversion valve for agriculture which can discharge | emit the air in a water supply pipe | tube in the closed state. It is another object of the present invention to provide a water supply / water supply system that uses such a water diversion valve and suppresses an impact at the time of exhaust while realizing rapid exhaust.

In order to solve the above-mentioned problems, the present invention relates to a frame body that is connected to a water supply pipe at a lower portion and includes a valve seat at an upper opening, a valve rod that is provided on the frame body so as to be movable up and down, and a lower end of the valve rod. In the agricultural diversion valve provided with a valve body that opens and closes the valve seat of the frame body, the valve body has a valve body body including an air hole penetrating in a vertical direction, and has a specific gravity higher than that of water. A diversion for agriculture comprising a float valve body made of a small material and capable of opening and closing the air hole, and having a float valve attached below the valve body, and having an upper cover above the air hole of the valve body. Provide a valve. Thereby, it can suppress that the water which jumped out from the air hole scattered upwards, and can prevent that the said water flows out beyond the casing which surrounds a water diversion valve.
The diameter of the air hole can be formed as follows. That is, the diameter of the air hole is significantly smaller than the inner diameter of the lower part of the frame body, so that the air flowing from the inside of the lower part of the frame body to the outside through the air hole is greatly exhausted during exhaust. It is possible to reduce the flow rate of the water that is squeezed and flows into the lower part of the frame body .
Et al is, it is possible to adopt a configuration for closing the air hole by the upper cover.
Moreover, in order to solve the said subject, this invention provides the following diversion water supply systems for agriculture. That is, the system is an agricultural diversion water supply system in which a water diversion valve is sequentially attached to the water supply pipe corresponding to each field to be diverted, and the water faucet is connected to the water supply pipe in the lower part. A frame body having a valve seat in the upper opening, a valve rod provided to be movable up and down with respect to the frame body, a valve body attached to a lower end of the valve rod and opening and closing the valve seat of the frame body; The valve body includes a valve body body having an air hole penetrating in the vertical direction, and a float valve body made of a material having a specific gravity smaller than that of water and capable of opening and closing the air hole. And a float valve attached below. And the air hole of a water diversion valve is formed smaller than the water diversion valve attached in the upstream from it in the water diversion valve attached in the most downstream side of a water supply pipe | tube.
The following system is also provided. That is, an agricultural diversion water supply system in which a water diversion valve is sequentially attached to a water supply pipe corresponding to each field to be diverted, and its water faucet is connected to the water supply pipe in the lower part and has an upper opening. A frame main body having a valve seat at a portion thereof, a valve rod provided to be movable up and down with respect to the frame main body, and a valve body attached to a lower end of the valve rod and opening and closing the valve seat of the frame main body The valve body includes a valve body main body having an air hole penetrating in the vertical direction and a float valve body made of a material having a specific gravity smaller than that of water and capable of opening and closing the air hole. And a float valve attached to the. And the air hole of a water diversion valve is formed so that it may become small gradually as it goes to the downstream from the upstream of a water supply pipe.

According to the agricultural diversion valve according to the present invention, since the air hole is provided in the valve body, and the float valve for opening and closing the air hole is provided integrally, the air in the water supply pipe can be discharged without opening the diversion valve. Since the air hole can be closed automatically by the action of the water flowing in the pipe after that, when the main plug of the water supply pipe is reopened, the diversion valve for venting the air in the pipe is opened. -No valve closing work is required. And since the valve body is further provided with the upper cover above the air hole of the valve body main body, it is possible to suppress the water jumping out from the air hole from being scattered upward, and the water surrounds the water dividing valve. It can prevent flowing out beyond the casing.
Furthermore, by significantly smaller than the diameter of the air holes in the lower portion of the inner diameter of the frame body, the float valve body when the exhaust Ru can reduce the impact when closing the air hole.
And an open position which opens the air inlet of the top cover to the valve body, by a moveable between a closed position closing the air outlet, biting the dust occurs in the float valve If necessary, the air port can be closed by the upper cover.
In the above-described agricultural diversion water supply system according to the present invention, the diameter of the air hole for venting the air provided in the diversion valve is arranged at the upstream side of the water faucet installed at least on the end side of the pipe. Since the diversion valve is made smaller than the above-mentioned diversion valve, the impact of the float valve body closing the air hole in the diversion valve can be reduced, and rapid exhaust as a whole system can be realized.

The diversion valve for agriculture and the socket for valves concerning a 1st embodiment of the present invention are shown, and it is a front view before water flow with a main stopper closed, and shows a partial section. It is a figure which shows the water stop state by the float valve after exhausting with the main stopper opened and the valve closed state. It is a figure which shows the water flow state by which the main stopper was opened and the valve was opened. It is a partial cross section front view of the diversion valve for agriculture which shows 2nd Embodiment of this invention. It is a front view before the water flow which showed the water diversion valve for agriculture which concerns on 3rd Embodiment of this invention, and the main stopper was tightened. It is a top view of the valve body main body used in the 3rd example. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. In 3rd Embodiment, it is a figure which shows the state by which the main stopper was opened, and the water stop was carried out by the float valve after exhaust in the valve closing state. It is a figure which shows the water flow state by which the main stopper was opened and the valve was opened in 3rd Embodiment. In 3rd Embodiment, it is a figure which shows the state by which the air hole is closed by the upper cover. It is a block diagram which shows the diversion water supply system for agriculture which concerns on this invention.

  With reference to the drawings, an embodiment of an agricultural diversion valve 1 according to the present invention will be described.

  First, an overall configuration of an agricultural diversion valve (hereinafter simply referred to as a diversion valve) 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a front view of the water-dividing valve 1 and the valve socket 100 in a closed state before passing water, and is partially shown in cross section.

  The diversion valve 1 is generally composed of a frame main body 2, a valve rod 14, a valve body 20, and a handle 98. The frame body 2 is arranged concentrically up and down, and has a cylindrical small tube portion 4 and a large tube portion 8 that are threaded on the inner surface, and connecting portions that connect the left and right side surfaces of the small tube portion 4 and the large tube portion 8 respectively. 12. A screw bush 6 is screwed into the small tube portion 4, and a short cylindrical valve seat 10 is attached to the upper end of the large tube portion 8.

  The valve stem 14 is a rod-like member that is threaded over substantially the entire length, and is attached to the screw bush 6 of the small tube portion 4 of the frame body 2 so as to be vertically movable. The valve stem 14 is moved up and down by rotating a handle 98 attached to the upper end, and is fixed at a desired position with respect to the frame body 2 by tightening a lock nut 18 attached at an upper position of the screw bush 6. The A groove 16 having a predetermined width extending in the circumferential direction is provided on the peripheral surface of the lower end portion of the valve stem 14, which will be described later.

  Next, the valve body 20 will be described. The valve body 20 includes a valve body main body 22, an upper cover 60 and a float valve 70 attached to the valve body main body 22. First, the valve body 22 will be described.

  The valve body 22 is composed of a shaft attaching portion 24 on a short column located in the upper center, a water receiving portion 38 that extends in the radial direction below, and a rib 36 that connects both of them. A blind hole 26 into which the lower end of the valve stem 14 is inserted is formed in the center of the upper portion of the shaft mounting portion 24, and a radial screw hole 28 that communicates with the blind hole 26 from the outer periphery is provided. A screw 30 is screwed into the screw hole 28, the tip of the screw 30 enters the groove 16 of the valve stem 14, and the nut 30 is tightened to fix the screw 30 to the shaft mounting portion 24. As a result, the valve body 22 moves up and down integrally with the valve stem 14.

  Reference numeral 38 denotes a water receiving portion that spreads in an umbrella shape below the shaft mounting portion 24, and is integrated with the shaft mounting portion 24 by ribs 36 that are provided at equal intervals in the circumferential direction and extend outward from the outer periphery of the shaft mounting portion 24. ing. The central portion 40 of the water receiving portion 38 is slightly thicker, a recess 42 is formed on the upper surface side, and an air hole 44 for venting air, which will be described later, penetrates downward in the center. ing.

  The lower end side of the air hole 44 is an annular portion 46 that protrudes slightly downward from the lower surface of the central portion 40. A circumferential groove 48 is formed along the annular portion 46 on the bottom surface of the central portion 40 at the base of the outer peripheral side of the annular portion 46, and a cross-section L-shaped along the circumferential groove 48 and the annular portion 46. A mold air hole packing 50 is disposed. This will be described later.

  Reference numeral 54 denotes a flat surface portion that extends radially outward from the upper end side of the central portion 40 of the water receiving portion 38, and a slope portion 56 that extends obliquely downward and outward from the outer edge portion is formed. A water stop valve seat packing 58 is disposed on the lower surface side of the flat portion 54, which will be described later.

  Reference numeral 60 denotes an upper cover attached to the shaft attachment portion 24. A female screw provided in a center hole 62 formed in the center of the upper cover is engaged with a male screw formed on the outer periphery of the shaft attachment portion 24, and a bottom surface thereof is provided. The shaft is fixed to the shaft mounting portion 24 by tightening until the upper surface of the rib 36 is touched. The upper cover 60 includes a flat surface portion 64 that extends horizontally and a short slope portion 66 that extends obliquely downward and outward from its edge. As a whole, the outer diameter is smaller than the water receiving portion 38 described above.

  A float valve 70 is attached to the valve body 22. The float valve 70 includes a bottomed cylindrical bucket 72, a flange 74 slightly projecting outward at the upper end, and four substantially rectangular window holes 76 formed at equal intervals in the circumferential direction on the peripheral wall. ing. Further, on the inner surface of the peripheral wall between the window holes 76, a ridge 78 extending in the vertical direction for guiding a float valve body 80 described later is formed.

  A float valve body 80 formed of a material having a specific gravity smaller than that of water is accommodated in the bucket 72 so as to be movable up and down. The float valve body 80 has an inverted truncated cone shape whose lower end side is slightly smaller in diameter than the upper end side, and an overhang portion 82 extending in the circumferential direction is formed on the outer periphery of the upper end portion, and this overhang portion 82 and the bucket 72 described above are formed. The float valve body 80 is centered by the ridges 78 on the inner surface.

  Reference numeral 84 denotes a bucket mounting member for mounting the bucket 72 to the valve body main body 22, and is smaller than the small diameter portion 86, the medium diameter portion 88, the large diameter portion 90, and the large diameter portion 90. And a flange 92 that spreads out. The bucket mounting member 84 is engaged with the valve body 22 by screwing a female screw formed on the inner periphery of the large-diameter portion 90 with a male screw formed on the outer periphery of the central portion 40 of the water receiving portion 38 described above. Fixed. At this time, the flange 74 of the bucket 72 is received by the small-diameter portion 86, and the flange 74 and a ring-shaped packing presser 52 arranged on the upper side and supporting the air hole packing 50 are connected to the upper surface of the small-diameter portion 86. The bucket 72 and the air hole packing 50 are fixed to the valve body 22 by being sandwiched between the lower surface of the central portion 40 of the water receiving portion 38.

  The flange 92 of the bucket mounting member 84 is configured to sandwich and hold the valve seat packing 58 between its upper surface and the lower surface of the flat surface portion 54 of the water receiving portion 38 of the valve body 22. The outer diameter of the valve seat packing 58 is larger than the outer diameter of the flange 92, and the portion protruding outward from the outer periphery of the flange 92 contacts the valve seat 10 and stops water as will be described later.

  The lower end of the air hole packing 50 protrudes slightly downward from the lower end of the annular portion 46 of the air hole 44 and the lower surface of the packing retainer 52, and the upper surface of the float valve body 80 raised in the bucket 72 as described later is The water stops in contact with this.

  The valve body 20 configured by combining the valve body 22, the upper cover 60 and the float valve 70 as described above is attached to the diversion valve 1 by being connected to the lower end portion of the valve stem 14 as described above. . The diversion valve 1 is arranged in a predetermined casing (not shown) arranged on the ground, and is connected to a water supply pipe (figure) via a valve socket 100 attached to the lower side of the large cylinder portion 8 of the frame body 2. (Not shown).

  Next, with reference to FIGS. 1, 2, and 3, a description will be given of an air discharge process in the water supply pipe and a water distribution method using the water distribution valve 1 when the main plug of the irrigation channel is opened. FIG. 2 is a front view of the water-dividing valve 1 and valve socket 100 in a closed state after passing water, FIG. 3 is a front view of the water-dividing valve 1 and valve socket 100 in an opened state after passing water, Both are shown partially cut away. Note that water is not shown in FIGS.

  At the end of use of irrigation water in the previous year, the diversion valve 1 is closed. As shown in FIG. 1, in the diversion valve 1 in the closed state, the valve seat packing 58 abuts against the valve seat 10 to close it, and the float valve The body 80 is dropped downward in the bucket 72, and the air hole 44 of the valve body 20 is in an open state. Unlike the conventional example which required opening the diversion valve 1 before passing water, when the main plug of the water supply pipe is opened in this state, the air accumulated in the water supply pipe is pushed out into the water, and the valve socket 100, bucket 72 (window hole 76) and the air hole 44 of the valve body 22 are gradually discharged from between the ribs 36 to the outside. At this time, water flows into the diversion valve 1 in accordance with the discharge of air. However, as described above, the float valve body 80 is made of a material having a specific gravity smaller than that of water, and thus flows into the bucket 72. It will be in a state of floating in the completed water.

  As described above, the float valve body 80 rises as the water level in the diversion valve 1 rises, presses the air hole packing 50 on its upper surface by buoyancy and water pressure, and closes the air hole 44 (FIG. 2). ). That is, after the air in the diversion valve 1 is discharged, the air hole 44 is automatically closed by the float valve body 80 without any operation, and the path connecting the inside and the outside of the diversion valve 1 is blocked. The Thereby, even if the diversion valve 1 is kept in the closed state, water is smoothly passed.

  When the water flow in the water supply pipe is completed, the water can be diverted from the diversion valve 1 in the same manner as the conventional diversion valve. That is, by turning the handle 98 to raise the valve body 20 and releasing the valve seat packing 58 from the valve seat 10, water flows out of the water separation valve 1 from the generated gap (FIG. 3). At this time, the float valve body 80 follows the ascending operation of the valve body 22 by water pressure, and continues to press the air hole packing 50 until it rises from the water surface.

  When stopping the water supply, the handle 98 is rotated in the reverse direction so that the valve seat packing 58 is pressed against the valve seat 10, and the position of the valve stem 14 is fixed by the lock nut 18 as described above. By fixing the valve stem 14 with the lock nut 18, it is possible to prevent the valve stem 14 from rotating and moving up and down due to the water pressure applied to the valve body 20.

  As described above, in such a configuration, a path for exhausting the air in the water supply pipe is secured even when the water diversion valve 1 is closed. Therefore, when resuming use of the water supply pipe, it is not necessary to prepare in advance to open the water diversion valve 1 before opening the main plug for the purpose of securing a path for exhaust. Moreover, since the float valve body 80 automatically closes the air hole 44 by the water pressure after the exhaust is completed, it is not necessary to manually close the diversion valve 1 after passing water.

  In addition, since there is a time lag between the completion of the air discharge and the closing of the air hole 44, there may be a problem that water that has passed through the air hole 44 flows out of the diversion valve 1 during that time. In the worst case, the float valve body 80 bites dust or the like that has flowed with the water between the air hole packing 50 and the like, and water jumps out of the diversion valve 1 from the gap. This can cause problems such as breaking down the bag. However, in the present embodiment, since the upper cover 60 is provided above the air hole 44, the water that has jumped out of the air hole 44 collides with this, and scattering of water upward can be suppressed. Thereby, it is possible to prevent the water that has jumped out from the air hole 44 from flowing out beyond the casing that surrounds the water dividing valve 1.

  In the present embodiment, the air hole 44 is provided at the center of the valve body 22, but may be provided on the inner side of the valve body 22 with respect to the valve seat 10. It may be provided at a position offset from the center of the main body 22.

  Further, the shapes of the float valve body 80 and the air holes 44 are not limited to those of the present embodiment, and various shapes can be taken. In particular, the float valve body 80 only needs to be able to close the air hole 44, and may have a thinner shape or a spherical shape.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a view corresponding to FIG. 1 and is a front view of a main part showing the water-stopper in a valve-closed state, partially showing a cross-section, omitting the handle, the upper part of the valve stem, and the lower part of the socket. . Since the configuration of the diversion valve 101 according to this embodiment is almost the same as that of the first embodiment described above, the same reference numerals are used for the same members.

That is, the diversion valve 101 includes a frame main body 2, a valve rod 14, a valve body 20, and a handle (not shown), and a valve seat 10 is attached to an upper end opening of the large cylinder portion 8 of the frame main body. ing. The valve body 120 includes a valve body 122, an upper cover 60, a float valve 70 including a bucket 72 and a float valve body 80.

The feature in this embodiment is the size of the air hole 144. That is, also in this embodiment, the recess 142 is formed on the upper surface side of the central portion 140 of the water receiving portion 138 of the valve body main body 122, and the air hole 144 is formed in the center of the recess 142. The size is significantly smaller than the diameter of the air hole 44 in the first embodiment. That is, the diameter of the air hole 144 is extremely smaller than the inner diameter of the socket 100 or the large cylinder part 8, and the air hole 144 is greatly reduced when the air passes through the air hole 144 from the lower part of the socket 100 or the large cylinder part 8. Due to the throttling effect, the flow rate of the water that flows from the upstream side of the water supply pipe toward the position where the water diversion valve 101 is installed and is about to flow into the large tube portion 8 of the diversion valve 101 is suppressed. Bring effect. As a result, the speed at which the float valve body 80 rises becomes slow, the impact when colliding with the air hole packing 50 becomes extremely small, and damage to the float valve 70 and the like can be prevented.

  Next, a third embodiment of the present invention will be described. In the first embodiment, the upper cover 60 is tightly and integrally attached to the valve body main body 22, and in this state, a passage for venting air is secured between them. In general, the upper cover is held at a position away from the valve body body so that a passage for air venting is secured between the two, while the upper cover is lowered as necessary to lower the air vent passage. It can be closed.

FIG. 5 is a view corresponding to FIG. 1 in the first embodiment, and shows a state in which the main tap for irrigation water is closed after the end of use in the previous year. In the third embodiment, the members other than the valve body and the upper cover of the valve body are slightly different in shape, but have the same configuration as the corresponding members in the first embodiment. These are denoted by the same reference numerals, and detailed description thereof is omitted.

  As in the first embodiment, the diversion valve 301 is generally composed of a frame main body 2, a valve stem 14, a valve body 320, and a handle 98. The frame body 2 has substantially the same shape as that in the first embodiment, and a cylindrical valve seat 10 is attached thereto. The valve stem 14 is attached to the frame body 2 so as to be movable up and down, rotated and moved up and down using a handle 98, and fixed at a desired position by a lock nut 18.

  Next, the valve body 320 will be described. The valve body 320 includes a valve body main body 322, and an upper cover 360 and a float valve 370 attached thereto. First, the valve body main body 322 will be described.

  6 is a plan view of the valve body 322, and FIGS. 7 and 8 are sectional views taken along lines AA and BB in FIG. 6, respectively. The valve body 322 is composed of a short columnar shaft mounting portion 324 located at the upper center, a water receiving portion 338 extending in the radial direction below, and a rib 336 connecting both of them. A blind hole 326 is formed in the upper center of the shaft mounting portion 324, a radial screw hole 328 is provided from the outer periphery to the blind hole 326, and the valve stem 14 is screwed by a screw 330 (FIG. 5) screwed there. It is the same as the first embodiment that it is attached and moves up and down integrally.

  Reference numeral 338 denotes a water receiving portion that spreads in an umbrella shape below the shaft mounting portion 324, and is integrated with the shaft mounting portion 24 by ribs 336 that extend outward from the outer periphery of the shaft mounting portion 324 at equal intervals in the circumferential direction. Yes. A central portion 340 (FIGS. 7 and 8) of the water receiving portion 338 is thicker than other portions, and a recess 342 (FIG. 7) is formed on the upper surface side, and the bottom of the recess 342 is further formed. An air hole 344 is provided in the center thereof so as to penetrate downward. The lower end side of the air hole 344 has the same configuration as that of the first embodiment, a circumferential groove 348 is formed around the air hole 344, and an air hole packing 350 having an L-shaped cross section is attached. (FIG. 5).

  In the first embodiment, the flat portion 54 extending around the central portion 40 has a uniform thickness. However, in the flat portion 354 in the present embodiment, the inner peripheral side, that is, around the recess 342. The range of the predetermined width is higher than the outer portion thereof, and forms a valve seat portion 355 that swells upward and surrounds the periphery of the recess 342. It is the same that an inclined surface portion 356 that extends obliquely downward and outward from the outer edge portion of the flat surface portion 354 is formed. A water-stop valve seat packing 58 is disposed on the lower surface side of the flat surface portion 354 (FIG. 5).

  In FIG. 5, reference numeral 360 denotes an upper cover, and the outline shape and attachment to the shaft attachment portion 324 of the valve body main body 322 by screw connection are the same as in the first embodiment, but the upper surface of the outer periphery thereof On the side, a knob portion 361 that is raised upward at a predetermined interval in the circumferential direction is provided. A vertical female screw 362 is formed in one of the knobs 361 so as to penetrate the knob 361, and a butterfly-shaped adjustment bolt 363 is screwed to the knob 361 so as to extend vertically. . Then, as shown in the drawing, the upper end of the shaft portion 364 in which the internal thread of the center portion of the upper cover 360 is formed on the inner periphery of the shaft mounting portion 324 of the valve body main body 322 is formed on the valve rod 14. The lower end of the adjusting bolt 363 hits the flat surface portion 354 of the valve body 322, and the upper cover 360 is fixed at the position shown in the figure. ing. That is, the upper cover 360 is fixed between the valve body main body 322 while maintaining an interval necessary for discharging air through the air holes 344.

  A float valve 370 is attached to the valve body 322. The shape of each member of the float valve 370 is slightly different from that of the first embodiment, but the configuration and operation are the same. Description is omitted.

  As shown in FIG. 5, the packing 358 attached to the valve body 324 with the valve stem 14 lowered downward by a predetermined amount in the state where the use of the irrigation water was completed in the previous year and the main irrigation water tap was closed as described above. It is seated on the valve seat 10. The float valve 370 is open. Further, a gap serving as an air passage is secured between the valve body main body 322 and the upper cover 360.

When the main irrigation plug is opened in the state of FIG. 5, as described in the first embodiment, water flows into the pipe, and the air existing in the pipe is discharged, and the float valve body of the float valve 370 is discharged. 380 is pressed against the air hole packing 350 to prevent outflow of water (FIG. 9). When irrigation water is used, the handle 98 is operated to raise the valve body 320 and open the valve seat 10 (FIG. 10). The float valve body 380 falls and opens a passage through which air flows by the air hole packing. In any case, the positional relationship between the valve body main body 322 and the upper cover 360 is not changed.

By the way, when the main plug is opened to start the supply of irrigation water, as described above, depending on the water flowing into the pipe, the air accumulated in the pipe is exhausted and stopped by the float valve 370. At that time, for example, there may be a case where the water stoppage is not performed completely due to the biting of dust, or the air hole packing or the float valve, resulting in a water leakage state. In that case, as shown in FIG. 11, the adjustment bolt 363 is turned to move upward with respect to the upper cover 360. Then, the upper cover 360 can move downward. Therefore, the upper cover 360 is rotated with respect to the shaft mounting portion 324 of the valve body 322 by using the knob 361 and is lowered. The flat bottom surface 360a can be pressed against the valve seat portion 355 of the valve body 322 to stop water. The biting of dust or maintenance and replacement of necessary parts can be performed by appropriately removing parts while using the irrigation water shown in FIG. Of course, the configuration employed in the third embodiment can also be employed in the water diversion valve in the second embodiment.

  FIG. 12 is a diagram showing a configuration of a water diversion / water supply system 200 using the water diversion valve 1 or 101 described above. Reference numerals 201-1 to 201-16 denote farm fields that are supplied with water by this system. Reference numeral 203 denotes a water supply tank, and water is supplied from the water supply tank 203 to each field through a water supply pipe (pipeline) 205. The water supply pipe 205 is provided with a water diversion valve 1 for diverting and supplying water to each field. The water diversion valve attached to the terminal side of the water supply pipe 205 is described above as the second embodiment. This is the water diversion valve 101. In the figure, 207 is a gate valve, and 209 and 211 are mud valves for discharging mud in the water supply pipe 205.

Here, when the gate valve 207 is opened, water flows from the tank 203 through the water supply pipe 205, and the air in the water supply pipe 205 is exhausted through the water diversion valve 1 installed corresponding to each field. The air holes 44 are sequentially closed by the float valve body 80 and flow toward the end of the water supply pipe while stopping water. At this time, at the position where the upstream water dividing valve 1 is installed, the water does not flow only into the water faucet 1 and flows further downstream, so the water dividing valve 1 The flow rate or momentum of the water flowing into the interior is not so strong, and the impact when the float valve body 80 rises and closes the air hole 44 is not so great. However, in the case of the diversion valve installed for the end farms 201-8 and 201-16, the flowing water is concentrated and flows into this diversion valve, and further at the end of the water supply pipe 205. If the same water diversion valve 1 as that installed upstream is also installed due to water hammer, the rising speed of the float valve body 80 becomes extremely large and collides with the air hole packing 50. The impact is extremely large.

Therefore, in this system 200, the diversion valve 101 according to the above-described second embodiment is used as the diversion valve installed at the end of the water supply pipe 205. As a result, the flow rate of water flowing into the diversion valve 101 is greatly reduced due to the throttling effect of the small air holes 144 as described above, and the impact when the float valve body 80 closes the air holes 144 is greatly reduced. On the other hand, the system as a whole can achieve rapid exhaust. If necessary, the diversion valve 101 according to the second embodiment may be used in an appropriate number of two or more on the end side. Further, the diameter of the air hole of the diversion valve may be gradually decreased from the upstream side or from the middle of the upstream side toward the downstream side, that is, the end. In addition, when the above problems do not arise, it is needless to say that water faucets having the same air hole dimensions can be used.

1: Diverging valve 14: Valve rod 20: Valve body 22: Valve body body 44: Air hole 50: Air hole packing 58: Valve seat packing 60: Upper cover 70: Float valve 72: Bucket 80: Float valve body 84 : Bucket mounting member 98: Handle 100: Socket for valve

Claims (11)

A frame main body connected to the water supply pipe at the lower part and having a valve seat at the upper opening, a valve stem attached to the frame main body so as to be movable up and down, attached to a lower end of the valve stem, An agricultural diversion valve including a valve body that opens and closes the valve seat, wherein the valve body includes a valve body body including an air hole penetrating in a vertical direction, and a material having a specific gravity smaller than water and the air hole. A float valve body capable of opening and closing, and a float valve attached below the valve body body ,
The diversion valve for agriculture , wherein the valve body further includes an upper cover located above the air hole of the valve body .   2. The agricultural diversion valve according to claim 1, wherein a diameter of the air hole is significantly smaller than an inner diameter of a lower part of the frame body, and the air hole is discharged from the lower part of the frame body during exhaust. A diversion valve for agriculture, characterized in that the air passing through is greatly throttled and the flow rate of water flowing into the lower part of the frame body can be reduced. The agricultural diversion valve according to claim 1 or 2, wherein the upper cover has an open position that forms a desired interval between the upper body and the valve body, and the valve body. An agricultural diversion valve characterized in that it can move up and down between a closed position that abuts on the air hole and blocks the flow of fluid through the air hole . 4. The agricultural diversion valve according to claim 3, wherein in the closed position, the lower surface of the upper cover is in contact with a valve seat portion formed around the air hole on the upper surface of the valve body main body. A diversion valve for agriculture, characterized in that the part is closed . The agricultural diversion valve according to claim 3 or 4, wherein the upper cover is attached to the valve body so as to be vertically movable . The agricultural diversion valve according to any one of claims 3 to 5 , further comprising a fixing means for fixing and holding the upper cover in the open position. . The agricultural diversion valve according to claim 6 , wherein the fixing means is moved relative to the upper cover.
An agricultural diversion valve comprising an adjustment member attached in a possible manner, and allowing the movement of the cover member from the open position to the closed position by operating the adjustment member . 8. The agricultural diversion valve according to claim 7, wherein the adjustment member is an adjustment bolt that is screwed into a female screw formed on the upper cover and extends through the upper cover. valve. 9. The agricultural tail diversion valve according to claim 8, wherein, in the open position, a lower end of the adjustment bolt abuts on an upper surface of the valve body main body, and the upper cover has the valve body main body or the valve body on the upper surface side thereof. An agricultural diversion valve characterized by being in contact with a member attached to a main body . In an agricultural water diversion system in which a water diversion valve is sequentially attached to a water supply pipe corresponding to each field to be diverted, the diversion tap is connected to the water supply pipe in the lower part and a valve seat in the upper opening. Agricultural component comprising: a frame body provided with: a valve rod attached to the frame body so as to be movable up and down; and a valve body attached to a lower end of the valve rod and opening and closing the valve seat of the frame body. The valve body includes a valve body main body having an air hole penetrating in the vertical direction, and a float valve body made of a material having a specific gravity smaller than that of water and capable of opening and closing the air hole. A float valve attached to the lower part of the main body,
The air hole of the diversion valve attached to the most downstream side of the water supply pipe is formed smaller than the air hole of the diversion valve attached to the upstream side of the diversion valve attached to the most downstream side. Agricultural diversion system . In an agricultural water diversion system in which a water diversion valve is sequentially attached to a water supply pipe corresponding to each field to be diverted, the diversion tap is connected to the water supply pipe in the lower part and a valve seat in the upper opening. Agricultural component comprising: a frame body provided with: a valve rod attached to the frame body so as to be movable up and down; and a valve body attached to a lower end of the valve rod and opening and closing the valve seat of the frame body. The valve body includes a valve body main body having an air hole penetrating in the vertical direction, and a float valve body made of a material having a specific gravity smaller than that of water and capable of opening and closing the air hole. A float valve attached to the lower part of the main body ,
The water diversion system for agriculture , wherein the air hole of the water diversion valve is formed so as to gradually become smaller from the upstream side to the downstream side of the water supply pipe .

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