JP2021145568A - Valve body unit for communication water path and water path structure for farm field - Google Patents

Abstract

To provide a valve body unit for communication water path capable of inhibiting a harmful effect caused by water hammering.SOLUTION: A valve body unit 4 is fitted to a communication water path 3 for supplying service water to a farm field 1 from an irrigation channel adjacent to the farm field 1. The valve body unit 4 comprises: a main body 10; a coupling part 12 coupled to a maintaining member 9 which is knocked to soil 2. The main body 10 has therein, a channel 10a communicated with an inside of the communication water path 3, and has a valve body 7 for closing and opening the channel 10a. The coupling part 12 is coupled to the maintaining member 9 knocked to the soil 2, therefore, a harmful effect such as water hammering can be suppressed, the water hammering causing detachment of the valve body unit 4 from the communication water path 3 when the valve body 7 closes the channel 10a.SELECTED DRAWING: Figure 1

Description

The present invention relates to a valve body unit for a connecting water channel from an irrigation canal to a field, and a water supply channel structure from the irrigation canal to the field, and in particular, a valve body unit and a water supply channel capable of suppressing adverse effects due to a water hammer. It is about the structure.

Conventionally, an intake cylinder has been provided to supply water from the irrigation canal to the paddy field. For example, in the semi-manual water supply device 44 for paddy fields shown in FIG. 19 (see Patent Document 1), the intake cylinder 45 is passed from the natural flow channel 41 (irrigation canal) to the paddy field 42 so as to be on the ridge 43. An on-off valve 47 whose upper end was supported by a shaft 46 was arranged inside the water intake cylinder 45.

Japanese Unexamined Patent Publication No. 10-099858

By the way, in the conventional semi-manual water dispenser 44 for paddy fields, when the on-off valve 47 is closed (see FIG. 19), there is a risk that the water intake cylinder 45 may come out of the natural flow channel 41 (irrigation canal) by the water hammer. was there.

The present invention has been made to solve the above-mentioned conventional drawbacks, and an object of the present invention is to provide a valve body unit for a connecting water channel, which can suppress the harmful effects of a water hammer, and a field. The purpose is to provide a water supply channel structure.

The valve body unit for the connecting water channel and the water supply channel structure to the field according to the present invention have the following configurations in order to achieve the above object. That is,
The valve body unit for a connecting water channel according to the invention according to claim 1 is a valve body unit attached to a connecting water channel that supplies water to the field from an irrigation canal adjacent to the field. The valve body unit includes a main body having a flow path that communicates with the inside of the connecting water channel and having a valve body that opens and closes the flow path, and a joint portion that is coupled to a maintenance member that is driven into the soil.

According to this valve body unit, the valve body unit is attached to a connecting water channel that supplies water from the irrigation canal to the field. This valve body unit includes a main body having a valve body and a joint portion, and the joint portion is bonded to a maintenance member driven into the soil. By coupling with this maintenance member, the valve body unit is held in a position attached to the connecting water channel. For this reason, the water hammer when the internal flow path of the main body is closed by the valve body causes the valve body unit to come off from the connecting water channel, or the connecting water channel together with the valve body unit to come off from the irrigation canal. It can be suppressed by binding.

Further, the valve body unit for the connecting water channel according to the invention according to claim 2 is separably connected to the main body in the valve body unit according to claim 1, and the end portion of the connecting water channel on the field side. A fixed body to be fixed to the fixed body is provided, and the joint portion is provided on the fixed body. By providing a fixed body that can be separated from the main body, when the valve body unit is removed, only the main body can be removed without removing the entire connecting water channel, and maintenance of the valve body becomes easy.

Further, in the water supply channel structure to the field according to the invention of claim 3, the connecting water channel is opened and closed at the end of the straight tubular connecting water channel that supplies water to the field from the irrigation canal adjacent to the field on the field side. A valve body unit is provided. Then, the valve body unit is coupled with a maintenance member driven into the soil between the irrigation canal and the field or the soil in the field.

According to this channel structure, the valve body unit is held in a position provided in the connecting channel by coupling with a maintenance member driven into the soil. For this reason, the harmful effects of the water hammer when the connecting water channel is closed by the valve body unit, such as the valve body unit coming off the connecting water channel or the connecting water channel coming off the irrigation canal together with the valve body unit, are suppressed by coupling with the maintenance member. can do.

Further, in the water supply channel structure to the field according to the invention of claim 4, a linear water supply channel having a flow path for supplying water to the field inside is inserted at one end into the water supply channel adjacent to the field. The other end is installed so as to open toward the field. Here, the water supply channel is provided with a valve body that opens and closes an internal flow path. Then, the water supply channel is provided so that the axial movement resistance portion protrudes, and at least a part of the axial movement resistance portion is buried in the soil between the irrigation canal and the field or the soil in the field. Has been done.

According to this irrigation canal structure, the irrigation canal is held in a position inserted into the irrigation canal by an axial movement resistance portion at least partially buried in soil. Therefore, the adverse effect of the water hammer causing the water supply channel to deviate from the irrigation canal when the flow path inside the water supply channel is closed by the valve body can be suppressed by the axial movement resistance portion.

According to the valve body unit for the connecting water channel and the water supply channel structure to the field according to the present invention, the following effects are obtained.

According to the valve body unit for the connecting water channel according to the first and second claims, the harmful effect of the water hammer that the valve body unit is separated from the connecting water channel or the connecting water channel is separated from the water channel together with the valve body unit is maintained. It can be suppressed by coupling with a member.

Further, according to the water supply channel structure to the field according to claim 3, the maintenance member prevents the harmful effect of the water hammer that the valve body unit is detached from the connecting channel or the connecting channel is detached from the irrigation channel together with the valve body unit. It can be suppressed by binding with.

Further, according to the structure of the water supply channel to the field according to claim 4, the harmful effect of the water hammer causing the water supply channel to deviate from the irrigation canal can be suppressed by the axial movement resistance portion.

It is a perspective view of the water supply channel structure of one Embodiment of this invention. It is a perspective view from the plane side of a valve body unit. Similarly, it is a perspective view from the back surface side. Similarly, it is a front view. Similarly, it is a plan view. Similarly, it is a vertical sectional view. Similarly, it is a vertical cross-sectional view in which the main body and the fixed body are separated. FIG. 5 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is a cross-sectional view taken along the line BB in FIG. It is a front view of a fixed body. It is a perspective view from the front side of a valve body. Similarly, it is a perspective view from the back side. The operation handle is shown, (a) is a perspective view, and (b) is a cross-sectional view. It is a perspective view of the valve body unit when the valve body is in an open position. Similarly, it is a vertical sectional view. FIG. 9 is a view corresponding to FIG. 9, in which the infested body in the operation indicator is in the forward position, the operation handle is locked, and the valve body is in the open position. FIG. 9 is a view corresponding to FIG. 9, in which the infested body in the operation indicator is in the retracted position, the infested body is released from the operation handle, and the valve body is in the closed position. It is a perspective view of the water supply channel structure of another embodiment of this invention. It is sectional drawing which shows the semi-manual type water dispenser for a conventional paddy field.

Hereinafter, a valve body unit for a connecting water channel according to the present invention and a mode for implementing a water supply channel structure to a field will be described with reference to the drawings.

1 to 17 show an embodiment of the present invention. Reference numeral 1 in the figure indicates a field. 2 indicates soil. Reference numeral 3 denotes a connecting water channel for supplying water to the field 1 from an irrigation canal (not shown) adjacent to the field 1. Reference numeral 4 denotes a valve body unit for a connecting water channel attached to the connecting water channel 3. 5 shows the water supply channel structure to the field 1.

FIG. 1 shows the water supply channel structure 5 to the field 1. In the water supply channel structure 5, one end of the water supply channel 6 (specifically, a linear water supply channel) having a flow path 6a for supplying water to the field 1 is inserted into the water supply channel adjacent to the field 1. The other end is installed so as to open toward the field 1. The water supply channel 6 is provided with a valve body 7 that opens and closes the internal flow path 6a. That is, the valve body 7 moves between an open position that opens the flow path 6a (specifically, a flow path 10a described later) and a closed position that closes the flow path 6a. Then, the water supply channel 6 is provided so that the axial movement resistance portion 8 protrudes. Therefore, at least a part of the axial movement resistance portion 8 is soil 2 (specifically, the soil between the irrigation canal and the field 1 or the soil in the field 1, and in the illustrated embodiment, the soil in the field 1 Buried in soil), the axial movement resistance portion 8 resists the axial movement of the water supply channel 6.

Specifically, in the water supply channel structure 5, the connecting water channel 3 (specifically, a straight tubular connecting water channel composed of a tubular body) for supplying water from the irrigation canal adjacent to the field 1 to the field 1 is on the field 1 side. A valve body unit 4 for opening and closing the connecting water channel 3 is provided at the end. That is, the water supply channel 6 is formed by the connecting water channel 3 and the valve body unit 4. Then, the valve body unit 4 was driven into the soil 2 (specifically, the soil between the irrigation canal and the field 1 or the soil in the field 1, and in the illustrated embodiment, the soil in the field 1). It is coupled to the maintenance member 9. Therefore, the maintenance member 9 to which the valve body unit 4 (more specifically, the coupling portion 12 described later) is coupled becomes the axial movement resistance portion 8 described above.

The valve body unit 4 has a flow path 10a that communicates with the inside of the connecting water channel 3 and opens and closes the flow path 10a (that is, a valve body that opens and closes the flow path 6a in the water supply channel 6 described above). It is provided with a main body 10 having a main body 10, an attachment portion 11 to the connecting water channel 3, and a connecting portion 12 to be bonded to a maintenance member 9 driven into the soil 2. Specifically, the mounting portion 11 comprises a fixed body 11a that is separably connected to the main body 10 and fixed to the end of the connecting water channel 3 on the field 1 side. Then, the connecting portion 12 is provided on the fixed body 11a.

Further, in the field 1, a water level gauge unit (not shown) for detecting that the water level in the field 1 has reached a predetermined water level is installed. Then, between the water level gauge unit and the valve body unit 4, the detection of the predetermined water level by the water level gauge unit is transmitted to the valve body unit 4, and the flow path 10a is opened from the open position (see FIGS. 15 and 16). A transmitter 13 is provided that allows the valve body 7 to move to a closed position (see FIGS. 6 and 17) that closes. Therefore, the valve body unit 4 (specifically, the main body 10) has a connecting portion 14 to which the transmitter 13 can be connected.

Specifically, in the valve body unit 4, the main body 10 includes a tubular valve body case 15 in which the valve body 7 is arranged. Then, as described above, the mounting portion 11 is composed of a fixed body 11a that is separably connected to the main body 10, and the fixed body 11a has a cylindrical shape so that the valve body case 15 and the inside of each other communicate with each other. The fixed body 11a and the valve body case 15 (and thus the main body 10) are separably connected to each other.

In the main body 10, the valve body case 15 is formed by bulging a portion closer to the downstream side of the flow path 10a (specifically, bulging in a substantially square shape), and the portion of the bulging portion 15a. It is composed of a first valve body case 151 and a second valve body case 152 divided by, and the first and second valve body cases 151 and 152 are integrated by a screw 16. The second valve body case 152 is an upper bulging portion 15b formed by bulging an upper portion following the bulging portion 15a (specifically, bulging in a substantially square shape). Here, the first valve body case 151 is located on the downstream side of the flow path 10a in the main body 10, and the second valve body case 152 is located on the upstream side of the flow path 10a. Therefore, the fixed body 11a is assembled on the second valve body case 152 side of the valve body case 15. Then, inside the valve body case 15 (specifically, the first valve body case 151), a valve seat 15c to which the valve body 7 (specifically, the valve body 7a described later) abuts is provided.

Further, the valve body case 15 has a bearing portion 15d that supports a shaft portion 17 for axially supporting the valve body 7. The bearing portion 15d is formed of a hole penetrating the inside and outside of the valve body case 15, and both side portions of the valve body case 15 sandwiching the flow path 10a (specifically, sandwiching the flow path 10a of the first valve body case 151). It is provided in the upper part of both sides).

The valve body 7 includes a valve body 7a and a shaft component 7b, and the valve body 7a and the shaft component 7b are connected by a connecting portion 7c. The valve body 7a is formed in a disk shape. Then, the peripheral edge side of the valve body 7a is formed by being bent diagonally, and the bent portion comes into contact with the valve seat 15c, so that the flow path 10a in the main body 10 (and by extension, the flow path 6a in the water supply channel 6) is formed. Close (see FIG. 6).

Each end of the shaft portion component 7b faces the bearing portion 15d inside the valve body case 15 (specifically, the first valve body case 151). Holes 7d are formed at each end of the shaft portion constituent portion 7b. Therefore, the valve body 7 is arranged in the bulging portion 15a so that a part of the irrigation water flows out to the field 1 at the outflow port 15e in the closed position, and the bulging portion 15a in the open position. It is accommodated in an upper portion extending from the upper bulge portion 15b. Further, the shaft portion constituent portion 7b is provided with a rod-shaped core material 7e at a central position. Therefore, a torsion spring 18 serving as an urging member is mounted on the outer periphery of the core material 7e. One end of the torsion spring 18 is supported by the back surface of the valve body 7 (specifically, the spring receiver 7f provided on the back surface of the valve body 7a), and the other end is the valve body case 15 (specifically, the first valve). Supported by the top surface of the body case 151), the valve body 7 is urged in the closing direction from the open position to the closed position.

Further, the main body 10 has an operation handle 19. The operation handle 19 includes a truncated cone-shaped base portion 19a, a first shaft portion 19b protruding from the back surface thereof and forming a part of the shaft portion 17, and a handle portion 19c extending from the side surface of the base portion 19a. .. As shown in FIG. 8, in the operation handle 19, the first shaft portion 19b is inserted into one bearing portion 15d of the valve body case 15 and attached and fixed to one end of the shaft portion constituent portion 7b of the valve body 7. Thus, the operation handle 19 is connected to one end (and by extension, the valve body 7) of the shaft portion constituent portion 7b. At the other end of the shaft portion 7b, a shaft member 20 having a second shaft portion 20a that is a part of the shaft portion 17 is inserted into the other bearing portion 15d of the valve body case 15 to form a shaft portion. It is attached and fixed to the other end of the portion 7b. In this way, the valve body 7 and the operation handle 19 (in addition, the shaft member 20 in the illustrated embodiment) are integrated, and the operation handle 19 is adjusted to the rotational movement of the valve body 7 (specifically, in detail. When the valve body 7 is in the closed position, the handle portion 19c is in the valve closed posture facing downward, and when the valve body 7 is in the open position, the handle portion 19c is in the closed position. The valve is opened in the horizontal direction.

Specifically, in the operation handle 19, the base portion 19a and the first shaft portion 19b are provided with a first large-diameter hole 19d from the base 19a side and a second large-diameter hole 19e from the first shaft portion 19b side. Further, a small diameter hole 19f is formed inside so as to communicate the first large diameter hole 19d and the second large diameter hole 19e. Therefore, the screw 21 passes through the first large-diameter hole 19d and the small-diameter hole 19f, and is screwed into the hole 7d provided at one end of the shaft portion component 7b inserted into the second large-diameter hole 19e. The one shaft portion 19b is attached and fixed to one end of the shaft portion constituent portion 7b, and the operation handle 19 is connected to one end (and thus the valve body 7) of the shaft portion constituent portion 7b. Then, a first large-diameter hole 20b is formed in the shaft member 20 from the front surface side, a second large-diameter hole 20c is formed from the back surface side, and a first large-diameter hole 20b is formed inside. A small diameter hole 20d is formed so as to communicate with the second large diameter hole 20c. Therefore, the screw 22 passes through the first large-diameter hole 20b and the small-diameter hole 20d, and is screwed into the hole 7d provided at the other end of the shaft portion component 7b inserted into the second large-diameter hole 20c. The second shaft portion 20a (shaft member 20) is attached and fixed to the other end of the shaft portion component 7b.

Further, in the operation handle 19, the extending direction of the handle portion 19c is a direction orthogonal to the protruding direction of the first shaft portion 19b, and the tip portion of the handle portion 19c, that is, the tip portion of the operation handle 19 is , The first shaft portion 19b is displaced in the protruding direction and formed in a flat shape. A locked hole (19 g) is formed in the tip portion thereof.

The connecting portion 14 is provided on the side portion of the valve body case 15 (main body 10) that sandwiches the flow path 10a. Specifically, the connecting portion 14 is located at the same height as the bearing portion 15d (and by extension, the base portion 19a of the operation handle 19) on the side portion of the upper bulging portion 15b of the second valve body case 152 that sandwiches the flow path 10a. A hole 14a is formed in the connecting portion 14 of the connecting portion 14. In the illustrated embodiment, the transmitter 13 is connected to the connecting portion 14 via the connecting auxiliary member 23. That is, the connection assisting member 23 is attached to the connecting portion 14, and the transmitter 13 is connected (specifically, detachably connected) to the connecting assisting member 23. Specifically, the connection assisting member 23 is provided with a mounting hole 23a, and the screw 24 passes through the mounting hole 23a and is screwed into the hole 14a provided in the connecting portion 14, whereby the connecting assisting member 23 is formed. Is attached to the connection portion 14.

Further, the connection assisting member 23 has a receiving recess 23b for receiving the operation handle 19 (specifically, the tip end portion of the operation handle 19) when the valve body 7 is in the open position. Specifically, the connection assisting member 23 includes a substantially cylindrical base end portion 23c and a substantially cylindrical tubular portion 23d protruding from the tip of the proximal end portion 23c, and the receiving recess 23b is a tubular portion 23d. It is provided at the base end portion 23c behind the above. The mounting hole 23a is provided so as to penetrate the receiving recess 23b from the back surface. A groove 23e is provided in the receiving recess 23b so as to intersect the mounting hole 23a, and the head of the screw 24 is fitted into the groove 23e. The tubular portion 23d serves as a connected portion to which the transmitter 13 (more specifically, the operation indicator 26 described later) is connected, and a female screw 23f is formed on the inner peripheral surface thereof. Then, a hole 23g is formed so as to communicate the inside of the tubular portion 23d and the receiving recess 23b.

The fixed body 11a has a flange portion 11b protruding outward at the end on the connecting water channel 3 side, and further has a groove 11c adjacent to the flange portion 11b. Therefore, the flange portion 11b and the groove 11c form the joint portion 12 described above. In the illustrated embodiment, the maintenance member 9 is composed of a pile 9a to be driven into the soil 2, and the pile 9a is brought into contact with the collar portion 11b and fitted into the groove 11c so as to be fitted with the collar portion 11b. It engages with the groove 11c, and by the engagement, the flange portion 11b and the groove 11c (joining portion 12) are coupled to the pile 9a (maintenance member 9). Specifically, a pair of piles 9a are provided, and the piles 9a and 9a are arranged at positions sandwiching the fixed body 11a (and thus the valve body unit 4).

Further, the fixed body 11a has a mounting hole 11d for fixing itself to the connecting water channel 3. Therefore, the fixed body 11a is fixed to the connecting water channel 3 by a fixing tool (not shown) such as a screw that is screwed or driven into the connecting water channel 3 through the mounting hole 11d, and eventually the valve body unit 4 is fixed. It is attached to the connecting waterway 3. However, the fixed body 11a may be fixed to the connecting water channel 3 by adhesion without using a fixing tool such as a screw, or may be fixed by adhesion in addition to a fixing tool such as a screw.

In assembling the valve body case 15 (main body 10) and the fixed body 11a, a part of the fixed body 11a is inserted into the end portion of the valve body case 15 (specifically, the second valve body case 152). Here, in the fixed body 11a, a guide groove 11e is formed on the outer peripheral surface of the portion to be inserted into the valve body case 15 (see FIG. 10). The guide groove 11e includes a first guide groove 11f extending obliquely from the tip of the fixed body 11a, and a second guide groove 11g extending in the circumferential direction following the first guide groove 11f. On the other hand, a protrusion 15x that engages with the guide groove 11e is provided on the inner peripheral surface of the valve body case 15 (specifically, the second valve body case 152) (see FIG. 7). Therefore, the main body 10 is pushed forward so that the fixed body 11a is inserted into the valve body case 15 (main body 10), and when the protrusion 15x enters the first guide groove 11f, the main body 10 is rotated (the illustrated embodiment). In (rotating in the clockwise direction), the protrusion 15x is guided by the first guide groove 11f, and the main body 10 is pulled toward the fixed body 11a. Then, by further rotating the main body 10 (rotating in the clockwise direction in the illustrated embodiment), the protrusion 15x moves in the second guide groove 11g.

A connecting member 25 is provided on the fixed body 11a. The connecting member 25 is slidably attached to the fixed body 11a in the axial direction thereof. Specifically, the connecting member 25 is formed in a U-shaped cross section and is fitted so as to cover the support protrusion 11h formed on the outer peripheral surface of the fixed body 11a, and the tip portion thereof is the valve body case 15 (main body 10). It is slidable between the first position protruding to the side (see FIG. 6) and the second position (see FIG. 7) reserved from the valve body case 15 (main body 10). On the other hand, an engaging protrusion 15f is formed on the outer peripheral surface of the valve body case 15 (main body 10). Therefore, when the connecting member 25 is slid from the second position to the first position in a state where the main body 10 has been rotated with respect to the fixed body 11a, the connecting member 25 covers the engaging projection 15f. Engage with the engaging projection 15f. As a result, the main body 10 is prevented from rotating, and the main body 10 and the fixed body 11a are connected to each other. Further, by sliding the connecting member 25 from the first position to the second position from the state where the main body 10 and the fixed body 11a are connected, the engagement of the connecting member 25 with the engaging projection 15f is released. Further, by rotating the main body 10 (rotating in the counterclockwise direction in the illustrated embodiment), the engagement of the protrusion 15x with the guide groove 11e is released, and the main body 10 is fixed. It can be removed from 11a.

The transmitter 13 includes an inner wire 13b arranged in the outer tube 13a. The inner wire 13b operates so as to be pulled into the water level gauge unit side by detecting a predetermined water level by the water level gauge unit. Further, the transmitter 13 is provided with an operation indicator 26 at the tip thereof. The operation indicator 26 includes an infestation body 27 and an indicator case 28 that slidably accommodates the infestation body 27. Specifically, the indicator case 28 is provided with a male screw 28a on the outer peripheral surface thereof, and the operation indicator 26 (transmitter 13) is connected by screwing the male screw 28a into the female screw 23f of the connection auxiliary member 23. It is connected to the auxiliary member 23 and, by extension, to the connecting portion 14 of the valve body unit 4.

By the slide, the locking portion 27a provided at the tip of the infested body 27 protrudes from the indicator case 28 (see FIG. 16), passes through the hole 23 g provided in the connection assisting member 23, and is in the valve opening posture. It enters the locked hole 19g of the handle 19.

Further, the infested body 27 has a wire connecting portion 27b to which the inner wire 13b is connected at the rear end side, and the inner wire 13b is pulled into the water level gauge unit side, so that the infested body 27 is in a protruding state. After moving from the forward position to the retracted position, the infestation body 27 (specifically, the locking portion 27a) is unlocked from the operation handle 19 (specifically, the locked hole 19g), and the urging member is released. Due to the urging of the torsion spring 18, the valve body 7 linked to the operation handle 19 moves from the open position (see FIG. 16) to the closed position (see FIG. 17). In the illustrated embodiment, since the infested body 27 is housed in the indicator case 28, the inner wire 13b is pulled into the indicator case 28 and connected to the wire connecting portion 27b of the infested body 27. Will be done. Then, the outer tube 13a is supported by the indicator case 28.

Next, the action and effect of the valve body unit 4 for the connecting water channel having the above configuration and the water supply channel structure 5 on the field 1 will be described. The valve body unit 4 is attached to a connecting water channel 3 that supplies water from the irrigation canal to the field 1. The valve body unit 4 includes a main body 10 having a valve body 7, an attachment portion 11 to a connecting water channel 3, and a joint portion 12, and the joint portion 12 is a maintenance member 9 driven into the soil 2. Combined with. By the coupling with the maintenance member 9, the valve body unit 4 is held at the position attached to the connecting water channel 3 (that is, provided in the connecting water channel 3). Therefore, when the flow path 10a inside the main body 10 is closed by the valve body 7 (that is, when the connecting water channel 3 is closed by the valve body unit 4), the valve body unit 4 is moved from the connecting water channel 3 by the water hammer. The harmful effects of disconnection and disconnection of the connecting water channel 3 together with the valve body unit 4 from the irrigation channel can be suppressed by coupling with the maintenance member 9. In particular, when the connecting water channel 3 is a straight tubular shape, the water hammer prevents the valve body unit 4 and the connecting water channel 3 from moving in a direction away from the irrigation channel by coupling with the maintenance member 9. can do.

Further, the water supply channel 6 is formed by the connecting water channel 3 and the valve body unit 4. Therefore, the maintenance member 9 coupled to the valve body unit 4 (specifically, the coupling portion 12) becomes the axial movement resistance portion 8, and the axial movement resistance portion 8 is at least partially buried in the soil 2. As a result, the water supply channel 6 is held at the position where it is inserted into the irrigation canal. Therefore, when the flow path 6a (specifically, the flow path 10a) inside the water supply channel 6 is closed by the valve body 7, the water hammer causes the water supply channel 6 to come off the irrigation canal. It can be suppressed by 8. In particular, when the water supply channel 6 is linear, the water hammer can prevent the water supply channel 6 from moving in a direction away from the irrigation canal by the axial movement resistance portion 8.

Further, in the valve body unit 4, since the mounting portion 11 is composed of the fixed body 11a that can be separated from the main body 10, when removing the valve body unit 4, only the main body 10 is removed without removing the connecting water channel 3. This makes maintenance of the valve body 7 easier. Further, since the joint portion 12 bonded to the maintenance member 9 driven into the soil 2 is provided on the fixed body 11a, the main body 10 can be removed while leaving the maintenance member 9 on the soil 2 side.

The present invention is not limited to the above-described embodiment, and various other modifications can be made. For example, the maintenance member 9 is composed of a pair of piles 9b and 9b to be driven into the soil 2 and a string 9c connecting the piles 9b and 9b, as shown in FIG. The string 9c may be arranged so as to come into contact with the flange portion 11b and fit into the groove 11c so as to be turned around the fixed body 11a (and thus the valve body unit 4).

Further, in the valve body unit 4, the coupling portion 12 may not be provided on the fixed body 11a or may be provided on the main body 10.

Further, the mounting portion 11 is composed of a fixed body 11a that is separably connected to the main body 10, but by being integrally formed with the valve body case 15 (specifically, the second valve body case 152), the mounting portion 11 and the main body 10 are formed. May be provided inseparably.

Further, the axial movement resistance portion 8 is not a maintenance member 9 driven into the soil 2, but is provided, for example, with a flange or a flange so as to project into the water supply channel 6 (that is, the connecting water channel 3 or the valve body unit 4). Therefore, at least a part of the flange or the flange may be buried in the soil 2. Further, the flange or the flange may be integrally provided in the water supply channel 6 (specifically, the connecting water channel 3 or the fixed body 11a or the valve body case 15), or may be attached by adhesion or the like.

Further, even if the water supply channel 6 is not composed of the connecting water channel 3 and the valve body unit 4 which is separate from the connecting water channel 3, the connecting water channel 3 and the valve body case 15 are integrated. , The connecting water channel 3 and the valve body unit 4 may be formed so as to be integrated.

1 Field 2 Soil 3 Connecting waterway 4 Valve body unit 5 Water supply channel structure 6 Water supply channel 6a Flow path 7 Valve body 8 Axial movement resistance part 9 Maintenance member 10 Main body 10a Flow path 11a Fixed body 12 Joint

Claims (4)

A valve body unit attached to a connecting canal that supplies water to the field from an aqueduct adjacent to the field.
A valve body unit for a connecting water channel having a main body having a flow path communicating with the inside of the connecting water channel inside and having a valve body for opening and closing the flow path, and a joint portion to be coupled with a maintenance member driven into the soil. .. The connecting water channel according to claim 1, further comprising a fixed body that is separably connected to the main body and fixed to the field-side end of the connecting water channel, and the connecting portion is provided on the fixed body. Valve body unit. A valve body unit that opens and closes the connecting waterway is provided at the end of the straight tubular connecting waterway that supplies water to the field from the waterway adjacent to the field on the field side.
The valve body unit is a water supply channel structure to a field, which is coupled with a maintenance member driven into the soil between the irrigation canal and the field or the soil in the field. A straight water supply channel having a flow path for supplying water to the field is installed so that one end thereof is inserted into the irrigation canal adjacent to the field and the other end opens toward the field.
The water supply channel is provided with a valve body that opens and closes an internal flow path, and also
The water supply channel is provided so that an axial movement resistance portion protrudes.
A water supply channel structure to a field in which at least a part of the axial movement resistance portion is buried in the soil between the irrigation canal and the field or the soil in the field.

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