JP2006166753A - Connecting structure of branch pipe in liquid supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting structure of a branch pipe in a liquid supply device enabling reliable connection between a branch pipe and a liquid supply pipe in a single action. <P>SOLUTION: The connecting structure of a branch pipe in a liquid supply device is prepared so as to connect the branch pipe 6 for supplying liquid to soil to the liquid supply pipe 5 in the liquid supply device. In the structure, the liquid supply pipe 5 is provided with a connection hole 51, a connection cylinder 7 made of flexible material and provided with an insertion cylinder part 71 to be inserted into the connection hole 51, the outer diameter of the insertion cylinder part 71 is formed so as to be larger than the inner diameter of the connection hole 51, the outer periphery of the insertion cylinder part 71 is provided with an engaging groove part with which the inner periphery of the connection hole 51 of the liquid supply pipe 5 can be engaged, the outer periphery at the tip end side of the insertion cylinder part 71 nearer than the engaging groove part of the insertion cylinder part 71 is provided with a tapered guide surface, an orifice 71 is formed at the inside of the liquid path of the connection cylinder 7, and the connection cylinder 7 is provided with an air suction hole 75 for taking the outside air into a liquid passage L. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a connection structure of a branch pipe to a liquid supply pipe in a liquid supply apparatus for supplying water or chemicals to soil such as an agricultural greenhouse or a field.

  In general, a liquid supply apparatus for supplying water or chemical liquid has a required number of branch pipes connected to a liquid supply main pipe, and a liquid supply pipe connected to the branch pipe via a cock and a pressure control valve. Along with the pipes of each crop, a large number of branch pipes are connected to the supply pipes, and the free ends of the branch pipes are inserted into the soil at the periphery of the crops, and water and chemicals are supplied from the branch pipes. The soil is supplied.

By the way, in the above liquid supply apparatus, in order to connect the branch pipe to the liquid supply pipe, for example, as shown in FIG. 6, a joint member B provided with the nozzle A is separately prepared, and this joint member B is connected to the liquid supply pipe. After fitting the outer periphery of C and inserting the tip end of the nozzle A into the connection hole D of the liquid supply pipe C, the joint member B is clamped by tightening the screw member E, thereby connecting the joint member B to the liquid supply pipe. In addition to being fixed to C, one end portion in the length direction of the branch pipe G is closely fitted in the connecting tube portion F provided on the joint member B. (See Patent Document 1)
And in the above liquid supply apparatus, the water and the chemical | medical solution sent from the liquid supply tank (not shown) are supplied to the branch pipe G through the nozzle A of the joint member B from the liquid supply pipe C, and are underground. It is injected.

However, in the liquid supply apparatus shown in FIG. 6, when connecting the branch pipe G to the liquid supply pipe C, in addition to the work of attaching the joint member B to the liquid supply pipe C, a tightening operation of the screw member E is required. Overall, it takes time to connect the branch pipe G to the liquid supply pipe C, and the number of parts is large, and a tool for operating the screw member is also required.
JP-A-8-37957

  The present invention was developed in view of the above circumstances, and the object is to connect the branch pipe to the liquid supply pipe with a single touch and reliably, and to supply water or water from the liquid supply pipe to the branch pipe. An object of the present invention is to provide a branch pipe connection structure in a liquid supply apparatus capable of reliably supplying a chemical liquid.

  In order to achieve the above object, according to the first aspect of the present invention, the branch pipe 6 for supplying the liquid to the soil is connected to the liquid supply pipe 5 for supplying the liquid in the liquid supply apparatus 1. In the connection structure, the connection hole 51 is formed in the liquid supply pipe 5, and the insertion tube that is formed of a flexible material at one end in the length direction of the branch pipe 6 and is inserted into the connection hole 51. A connection cylinder 7 having a portion 71 is provided, and the outer diameter of the insertion cylinder portion 71 is formed larger than the inner diameter of the connection hole 51, and the connection pipe 5 is connected to the outer periphery of the insertion cylinder portion 71. A fitting groove 72 is formed in which the inner peripheral edge of the hole 51 can be fitted, and the distal end side outer peripheral surface of the insertion cylinder 71 is directed to the distal end of the insertion cylinder 71 than the fitting groove 72 in the insertion cylinder 71. A tapered guide surface 73 tapered according to FIG. And it is characterized in and.

  According to the second aspect of the present invention, an orifice 74 is provided in the liquid passage L of the connection tube 7 according to the first aspect, and the connection tube 7 is used for taking outside air into the liquid passage L. An air suction hole 75 is provided.

  According to the first aspect of the present invention, the branch pipe can be connected to the liquid supply pipe by a simple operation of placing the tip of the connection cylinder into the connection hole of the liquid supply pipe and pushing the connection pipe into the liquid supply pipe. It came to be able to connect surely.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the liquid sent from the liquid supply pipe to the soil via the branch pipe is arbitrarily adjusted by the orifice provided in the connecting cylinder. Of course, external air is drawn into the liquid passage through the air suction hole due to the flow of the liquid flowing into the liquid passage through the orifice, and the air and liquid are mixed. As a result, liquid and oxygen can be supplied to the soil, and the flow of the liquid can be easily confirmed from the outside of the branch pipe.

  FIG. 1 is a configuration diagram of a liquid supply apparatus for supplying water or chemicals to soil such as agricultural greenhouses and fields. The liquid supply apparatus 1 is a liquid supply main connected to a liquid supply pump 2. 3, a plurality of branch pipes 4 connected to the liquid supply main pipe 3 via a branch joint 31, a liquid supply pipe 5 connected to the branch pipe 4 via a cock 41, and the liquid supply pipe 5 And a branch pipe 6 connected to the.

  And in the above liquid supply apparatus, while arrange | positioning the liquid supply pipe | tube 5 along the fence of agricultural products, the free end side of the branch pipe 6 connected to this liquid supply pipe | tube 5 is inserted in the soil T around agricultural products. Water and chemicals are supplied to the soil T.

  In the figure, 20 indicates a liquid supply tank for storing water and chemicals, and 42 indicates a bypass pipe.

  The present invention relates to a connection structure of the branch pipe 6 to the liquid supply pipe 5 in the liquid supply apparatus 1 having the above-described configuration. Next, the connection structure will be described in detail.

  First, a plurality of connection holes 51 are opened in the liquid supply pipe 5 at predetermined intervals, and these connection holes 51 are opened in a circular shape.

  The branch pipe 6 connected to the liquid supply pipe 5 includes a liquid supply pipe side pipe member 6a and a soil side pipe member 6b.

  The soil side pipe member 6b is made of a pipe material that is slightly larger than the liquid supply pipe side pipe member 6a. By inserting the liquid supply pipe side pipe member 6a into the soil side pipe member 6b, both pipes are inserted. The members 6a and 6b are connected.

  These liquid supply pipe side pipe member 6a and soil side pipe member 6b are both made of a soft plastic material and are free of elastic deformation.

  Moreover, the insertion regulation body 61 to the soil T is assembled | attached to the length direction one end part of the soil side pipe member 6b.

  On the other hand, a connecting tube 7 is assembled to one end portion in the length direction of the liquid supply pipe side pipe member 6a, and one end portion in the length direction of the liquid supply pipe side pipe member 6a is connected to the liquid supply pipe via the connection tube 7. 5 connection holes 51 are connected.

  The connection cylinder 7 is made of a flexible material, specifically, a soft plastic material that can be elastically deformed. At one end in the length direction, the connection cylinder 7 is inserted into the connection hole 51. A portion 71 is provided.

The insertion cylinder portion 71 has a general outer diameter larger than the inner diameter of the connection hole 51, and the inner periphery of the connection hole 51 in the liquid supply pipe 5 is fitted to the outer periphery of the insertion cylinder portion 71. A possible annular fitting groove 72 is formed, and a taper-shaped guide surface 73 that is tapered toward the distal end on the distal end side outer peripheral surface of the insertion cylindrical portion 71 rather than the fitting groove 72 in the insertion cylindrical portion 71. The minimum diameter L1 of the tapered tip of the guide surface 73 provided is slightly smaller than the inner diameter of the connection hole 51, and the maximum diameter L2 of the thicker tip is larger than the inner diameter of the connection hole 51. Yes.

In addition, an orifice 74 is provided at an opening portion of the insertion tube portion 71 in the connection tube 7, and an air suction hole 75 for taking outside air into the liquid passage L of the connection tube 7 in the middle of the connection tube 7. In the above liquid supply apparatus, when connecting the branch pipe 6 to the liquid supply pipe 5, the tip of the insertion cylinder portion 71 in the connection cylinder 7 is set in the connection hole 51 of the liquid supply pipe 51, If the connection pipe 7 is pushed into the liquid supply pipe 5 from this state, the distal end side of the insertion tube portion 71 provided with the guide surface 73 passes through the connection hole 51 while being elastically deformed in the diameter reducing direction. The inner periphery of the connection hole is fitted in the joint groove 72 and the distal end side of the insertion tube portion 71 elastically deformed in the diameter reducing direction is restored to the original state, whereby the liquid supply in which the connection tube 7 is assembled. The pipe side pipe member 6a is securely connected to the liquid supply pipe 5. Real and tightly connected.

  And the free end side of the supply pipe side pipe member 6a connected as mentioned above is inserted in the soil side pipe member 6b, and both pipe members 6a and 6b are connected, and when used, as shown in FIG. The soil side pipe member 6b is inserted into the insertion hole W formed in the soil T in advance.

  Thus, the water sent from the tank 20 to the liquid supply pipe 5 via the liquid supply main pipe 3 and the branch pipe 4 by the drive of the liquid supply pump 2 passes through the orifice 74 of the connecting cylinder 7 to the branch pipe. 6 is supplied into the soil T.

    By the way, in the above liquid supply apparatus 1, external air is drawn into the liquid passage L through the air suction hole 75 due to the flow action of the liquid flowing into the liquid passage L of the connection cylinder 7 through the orifice 74. Then, air is mixed into the liquid in the liquid passage L, so that not only the liquid but also oxygen can be supplied to the soil T, and from the outside of the branch pipe 6 along with the mixing of air into the liquid. This makes it possible to easily check the flow of the liquid.

  Further, the liquid sent from the liquid supply pipe 5 to the soil T via the branch pipe 6 can be arbitrarily adjusted by the orifice 74 provided in the connection cylinder 7.

  Thus, according to the above liquid supply device 1, the tip of the insertion cylinder portion 71 in the connection cylinder 7 is set in the connection hole 51 of the liquid supply pipe 51 and the connection pipe 7 is pushed into the liquid supply pipe 5. With this simple operation, the branch pipe 6 can be reliably connected to the liquid supply pipe 5.

  In addition, the above liquid supply apparatus can be used not only for water supply but also for supplying liquid fertilizer.

  Moreover, in the above embodiment, although the branch pipe 6 was divided | segmented into the liquid supply pipe side pipe member 6a and the soil side pipe member 6b, it is not necessarily required to divide | segment.

  In the above embodiment, the connection cylinder 7 is formed separately from the branch pipe 6, but the present invention is not limited to this, and the connection cylinder 7 may be formed integrally with the branch pipe 6.

Explanatory drawing of the liquid supply apparatus which employ | adopts the connection structure concerning this invention. Sectional drawing of the principal part at the time of use of a liquid supply apparatus. The expanded sectional view of the principal part at the time of use of a liquid supply apparatus. The front view of a connection cylinder. The side view of a connection cylinder. Sectional drawing which shows the connection structure of the conventional branch pipe in a liquid supply apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid supply apparatus 3 Liquid supply main pipe 4 Branch pipe 5 Liquid supply pipe 51 Connection hole 6 Branch pipe 6a Liquid supply pipe side pipe member 6b Soil side pipe member 7 Connection cylinder 71 Insertion cylinder part 72 Fitting groove part 73 Guide surface 74 Orifice 75 Air suction hole T Soil

Claims (2)

  In the connection structure in which the branch pipe 6 for supplying the liquid to the soil is connected to the liquid supply pipe 5 for supplying the liquid in the liquid supply apparatus 1, the connection hole 51 is formed in the liquid supply pipe 5. On the other hand, at one end in the lengthwise direction of the branch pipe 6, a connection cylinder 7 is provided which is formed of a flexible material and includes an insertion cylinder part 71 that is inserted into the connection hole 51. Is formed larger than the inner diameter of the connection hole 51, and a fitting groove portion 72 in which the inner peripheral edge of the connection hole 51 in the liquid supply pipe 5 can be fitted is formed on the outer periphery of the insertion tube portion 71. In addition, a taper-shaped guide surface 73 that is tapered toward the distal end of the insertion cylinder part 71 is provided on the outer peripheral surface on the distal end side of the insertion cylinder part 71 with respect to the fitting groove part 72 in the insertion cylinder part 71. Branch pipe connection structure in the liquid supply device .   An orifice 74 is provided in the liquid passage L of the connection tube 7, and an air suction hole 75 for taking in external air into the liquid passage L is provided in the connection tube 7. 2. A nozzle for spraying liquid according to 1.

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