JP5210123B2 - Fitting pipe - Google Patents

Description

  The present invention relates to a joint pipe provided with a cylindrical portion having one end connected to a pipe and a connecting portion having a tank connected to the other end of the cylindrical portion.

  2. Description of the Related Art Conventionally, a liquid feeding device is known in which one end of a joint pipe is connected to a tank, the other end of the joint pipe is connected to a pipe, and liquid in the tank is sent from the pipe to the server through the joint pipe.

  In this liquid feeding device, a structure that reduces the number of cleaning steps by disposing a valve body on the joint pipe instead of a ball that prevents backflow of the tank and also serving as backflow prevention means for the cleaning sponge that cleans through the pipe is disclosed. (See Patent Document 1).

  Moreover, the structure which formed the stopper plate in the opening direction of the valve body is disclosed (refer patent document 2).

Further, a structure in which a valve body is integrated with a diaphragm and a protruding flat plate portion is provided for engagement with an opening is disclosed (see Patent Document 3).
JP 2008-142600 A JP-A-10-132112 JP 2005-30553 A

  However, in the configuration described in Patent Document 1, since the cylindrical portion and the valve body hit each other at a point, it is difficult to stabilize the valve body in the liquid when the valve body is opened. For this reason, there is a possibility that the cleaning sponge may be caught on the valve body and the cleaning efficiency may be reduced.

  In the configuration described in Patent Document 2, the valve body is stabilized by the stopper plate, but the stopper plate itself may hinder the passage of a cleaning tool such as a sponge.

  In the configuration described in Patent Document 3, when the liquid becomes high pressure, the diaphragm rises against the spring, and the flat plate portion opens the opening according to the pressure of the liquid. The cleaning sponge may be caught on the flat plate portion.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a joint pipe capable of suppressing the sponge member from being caught near the valve body during cleaning.

  In order to solve the above-described problem, a joint pipe according to the invention described in claim 1 is provided with a cylindrical part having one end connected to the pipe and having a flow path formed at the other end of the cylindrical part. A connecting portion connected to the connecting portion, a valve body that is provided between the connecting portion and the tubular portion, closes the flow path, and supports an end portion of the valve body so as to be rotatable only toward the tubular portion side. And an opening / closing valve configured to include the support member, and the valve body is inclined so that the thickness decreases from the central portion toward the support member side.

  In the first aspect of the present invention, the pipe is connected to one end of the cylindrical portion, and the tank is connected to the connecting portion provided at the other end of the cylindrical portion. An on-off valve is provided between the tubular portion and the connection portion, and the on-off valve supports the valve body that closes the flow path and the end of the valve body so as to be rotatable only toward the tubular portion side. And a support member. In a state where no liquid is introduced from the tank, the valve body closes the flow path. When the liquid is introduced from the tank to the connection portion, the valve body supported by the support member rotates toward the cylindrical portion, and the flow path is opened. At that time, the valve body is inclined so that the thickness is reduced from the central part to the support member side, the valve body is easy to turn to the cylindrical part side, and the inclined surface of the valve body is opened when the valve body is opened. It contacts the inner wall of the cylindrical part. For this reason, when the liquid passes, the open state of the valve body is stabilized, the sponge member easily passes between the valve body and the cylindrical portion, and the sponge member is prevented or suppressed from being caught near the valve body. .

  According to a second aspect of the present invention, in the joint pipe according to the first aspect, the valve body has a protruding portion that protrudes toward the cylindrical portion at the center portion, and the deformation starting point of the support member. It is made into the shape settled in the inside of the line | wire which connected the protrusion front-end | tip of the said protrusion part.

  In the invention according to claim 2, the valve body has a projecting portion projecting toward the cylindrical portion side at the center portion, and is inward of a line connecting the deformation starting point of the support member and the projecting tip of the projecting portion. The valve body is easy to turn to the cylindrical portion side, and the protruding portion contacts the inner wall of the cylindrical portion when the valve body is opened. For this reason, when the liquid passes, the open state of the valve body is further stabilized, and the sponge member is more reliably prevented or suppressed from being caught near the valve body.

  According to a third aspect of the present invention, in the joint pipe according to the first or second aspect, the inner diameter of the cylindrical portion is larger than the inner diameter of the connecting portion between the cylindrical portion and the connecting portion. Forming a stepped portion, and the on-off valve includes a rubber plate fixed to the stepped portion and capable of closing the flow path, and forming a slit cut in a circular shape leaving a part in the rubber plate The part is used as the support member, and the circular part is used as the valve body.

  In the invention according to claim 3, a stepped portion is formed between the tubular portion and the connecting portion with the inner diameter of the tubular portion being larger than the inner diameter of the connecting portion, and the rubber constituting the opening / closing valve at the stepped portion. The board is fixed. The on-off valve forms a slit that is cut in a circular shape, leaving a part in the rubber plate, and the circular portion is a valve body that closes the flow path, and the end of the valve body is the cylindrical portion side. It is set as the support member supported so that rotation is possible. In the state where the liquid is not introduced from the tank, the on-off valve is arranged at a position along the step portion to close the flow path, and when the liquid is introduced from the tank to the connection portion, a part of the rubber plate The support member is extended, the valve body is rotated toward the cylindrical portion, and the flow path is opened. For this reason, the configuration of the on-off valve is simplified. In addition, since the outer peripheral end of the rubber plate is a circumferential support member, the rubber plate can be stably fixed at the stepped portion, and the rubber plate can also serve as a seal by contacting the stepped portion. it can.

  The invention according to claim 4 is the joint pipe according to any one of claims 1 to 3, wherein the valve body is attached to a disc and a central portion of the disc, A conical rigid auxiliary member that prevents backflow.

  According to the fourth aspect of the present invention, the valve body has a conical rigidity auxiliary member attached to the central portion of the disk, and the valve body has a flow path when no liquid is introduced from the tank. It becomes possible to close stably. Further, by introducing the liquid from the tank, the valve body can be stably rotated to the cylindrical portion side, and the backflow of the liquid is prevented. Further, by using the conical rigidity auxiliary member, the conical surface comes into contact with the inner wall of the cylindrical portion in a wide range when the valve body is opened. For this reason, the open state of the valve body can be further stabilized in the liquid.

  According to a fifth aspect of the present invention, in the pipe joint according to the fourth aspect, the outer diameter of the rigid auxiliary member is set in a range of 40% to 80% of the inner diameter of the cylindrical portion. .

  In the invention according to claim 5, the outer diameter of the rigidity auxiliary member is set in a range of 40% to 80% of the inner diameter of the cylindrical portion, and the valve body easily rotates toward the cylindrical portion. When the body is released, the protruding portion stably contacts the inside of the cylindrical portion. On the other hand, when the outer diameter of the rigid auxiliary member is outside the range of 40% to 80% of the inner diameter of the tubular portion, the valve body is difficult to turn to the tubular portion side, and the valve body is opened in the liquid. It becomes difficult to stabilize.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent or suppress that a sponge member is caught near the valve body of a cylindrical part at the time of washing | cleaning.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a joint pipe 10 according to an embodiment of the present invention. The joint pipe 10 includes a cylindrical portion 12. A flow path 14 through which a liquid (for example, beer) can pass is formed on the inner peripheral side of the cylindrical portion 12. The inner circumferential side of the cylindrical portion 12 has a large diameter portion 12A on the upstream side in the liquid introduction direction (lower side in FIG. 1), and the diameter gradually increases from the large diameter portion 12A toward the downstream side in the liquid introduction direction. The taper part 12B which shrinks | reduces, and the small diameter part 12C which continues in a liquid introduction direction downstream from the taper part 12B. That is, the flow path 14 is comprised by the large diameter part 12A, the taper part 12B, and the small diameter part 12C.

  As shown in FIG. 3, a pipe (not shown) such as a hose is connected to one end of the cylindrical portion 12 on the downstream side in the liquid introduction direction (upper side in FIG. 3) via a joint 18. . The downstream end of the pipe is connected to a server (not shown) for supplying beer, for example. Further, a cylindrical connecting portion 16 is provided at the other end of the cylindrical portion 12 which is the upstream side in the liquid introduction direction (lower side in FIG. 3), and this connecting portion 16 is connected to the cleaning tank 70. Has been.

  As shown in FIG. 1, the inner peripheral portion on the other end side (upstream side in the liquid introduction direction) of the cylindrical portion 12 has a larger diameter than the large diameter portion 12A, and a screw portion 12D is formed on the inner peripheral portion. Is formed. Moreover, the outer peripheral part on the opposite side to the cleaning tank 70 of the connection part 16 has a large diameter, and a screw part 16A to be screwed with the screw part 12D is formed on the outer peripheral part. The connecting portion 16 is attached to the cylindrical portion 12 by screwing the screw portion 16 </ b> A of the connecting portion 16 into the screw portion 12 </ b> D of the cylindrical portion 12.

  A circular opening 16B through which liquid flows is formed on the cylindrical portion 12 side of the core portion of the connecting portion 16. A tapered portion 16C is formed on the side of the cleaning tank 70 at the core portion of the connecting portion 16 so as to be continuous with the opening portion 16B and the inner diameter is enlarged. On the cleaning tank 70 side of the tapered portion 16C, a lower portion of the tapered portion 16C is formed. An opening 16D having a diameter larger than that of the opening 16B is formed. A substantially U-shaped opening 36 is formed at a position opposite to the wall surface of the opening 16D. The inner diameter of the opening 16D is set to 7.6 mm, and the inner diameter of the opening 16B is set to 5 mm. The angle of the tapered portion 16C with respect to the opening portion 16B is set to 45 °.

  The opening 16D is formed in such a size that a substantially cylindrical sponge member 30 (see FIG. 3) for cleaning the inside of a pipe (not shown) can be set. The outer diameter of the sponge member 30 (see FIG. 3) is set to, for example, 7.8 mm to 8.5 mm. For example, foaming polyurethane is used as the sponge member 30. The opening 16 </ b> D is a sponge locking portion that can lock the sponge member 30, and the opening 16 </ b> B is a pinching portion having an inner diameter smaller than the outer diameter of the sponge member 30.

  The inner diameter of the opening 16B is smaller than the inner diameter of the large-diameter portion 12A of the cylindrical portion 12, and a step portion 22 is formed at the end of the connection portion 16 opposite to the cleaning tank 70. An opening / closing valve 20 that can open and close the flow path 14 is disposed adjacent to the step portion 22 between the connection portion 16 and the cylindrical portion 12. The mounting structure of the on-off valve 20 will be described later.

  As shown in FIGS. 2A to 2B, the on-off valve 20 includes a circular rubber plate 24, and a support that is a part of a circle on the inner diameter side of the circumferential portion 24 </ b> A of the rubber plate 24. A slit S1 that is cut in a circular shape leaving the portion 25 is formed, and a circular portion inside the slit S1 is a valve body 26. Concave portions 27 are formed on both sides of the rubber plate 24 around the support portion 25 and the support portion 25, and the thickness of the support portion 25 and the periphery of the support portion 25 is the thickness of the rubber plate 24 of other portions. Thinner than that. A corner portion 27A in the recess 27 is cut out in an R shape. A circular opening 26 </ b> B is formed in the central portion of the rubber plate 24 as a disc constituting the valve body 26.

  As shown in FIG. 1, a rigid auxiliary member 28 including support portions 28 </ b> A and 28 </ b> B supported on the upper and lower surfaces of the valve body 26 is fitted in the opening 26 </ b> B of the rubber plate 24. The rigidity auxiliary member 28 is for preventing the backflow of liquid, and is formed of a material (for example, resin) harder than the rubber material of the rubber plate 24 so that the circular portion of the rubber plate 24 is not deformed. The stiffness assisting member 28 is for preventing the backflow of the liquid, and a conical projecting portion 28 </ b> C projecting toward the cylindrical portion 12 is formed at the center. The protruding portion 28C has an inclined shape so that the thickness decreases from the central portion toward the support portion 25 side. In other words, the rigidity auxiliary member 28 has a shape that fits inside the line connecting the deformation starting point of the support portion 25 and the protruding tip of the protruding portion 28C.

  At this time, the outer diameter of the stiffness assisting member 28 is set in the range of 40% to 80% of the inner diameter of the large diameter portion 12A of the cylindrical portion 12, and more preferably in the range of 40% to 65%. By setting the outer diameter of the rigid auxiliary member 28 within a range of 40% to 80% of the inner diameter of the large-diameter portion 12A of the cylindrical portion 12, the valve body 26 can be easily rotated to the cylindrical portion 12 side. When the body 26 is opened, the projecting portion 28 </ b> C stably contacts the inside of the tubular portion 12. When the outer diameter of the stiffness assisting member 28 is outside the range of 40% to 80% of the inner diameter of the large-diameter portion 12A of the cylindrical portion 12, the valve body 26 is difficult to rotate to the cylindrical portion 12 side, and the liquid Among them, it becomes difficult to stabilize the open state of the valve body 26. Moreover, the outer diameter of the valve body 26 is set to 9.4 mm.

  Between the cylindrical portion 12 and the connecting portion 16, the stepped portion 22, the end surface 17 of the large-diameter portion 12 </ b> A, and the inner peripheral portion of the cylindrical portion 12 adjacent thereto are disposed downstream of the stepped portion 22 in the liquid introduction direction. A configured groove is formed, and a circumferential portion 24A of the rubber plate 24 is sandwiched between the grooves. Then, by adjusting the tightening amount of the threaded portion 16A of the connecting portion 16 to the threaded portion 12D of the tubular portion 12, the circumferential portion 24A of the rubber plate 24 is connected to the stepped portion 22 of the connecting portion 16 and the tubular portion 12. It is fixed between the end face 17.

  In the normal state, the opening / closing valve 20 has the valve body 26 and the circumferential portion 24A of the rubber plate 24 on the same plane by the support portion 25, and the valve body 26 comes into contact with the step portion 22 to close the flow path 14. ing. On the other hand, as shown in FIG. 4, when the liquid is introduced, the rubber support portion 25 extends, and the valve body 26 rotates downstream in the liquid introduction direction, so that the flow path 14 is opened. ing. At that time, when the thickness of the support portion 25 and the concave portion 27 around the support portion 25 is thinner than the thickness of the rubber plate 24, the support portion 25 is easily stretched and liquid is introduced at a low fluid pressure. However, the valve body 26 is easy to rotate. Further, by providing the rigidity auxiliary member 28 at the center of the valve body 26, the valve body 26 is stably held at the position where the flow path 14 is closed, and the valve body 26 is moved toward the cylindrical portion 12 by introducing liquid. It can be smoothly rotated. Thereby, the back flow of the liquid can be suppressed.

  In addition, as a material which comprises the rubber plate 24 as the on-off valve 20, SBR, NBR, EPDM, silicone rubber, fluororubber, IIR (butyl rubber), natural rubber, etc. are used, for example. The material of the stiffness assisting member 28 is preferably a material harder than the rubber plate 24 in order to prevent deformation of the circular portion of the rubber plate 24. For example, PBT (polybutylene terephthalate), polypropylene, polyacetal, or the like is used. Yes.

  As shown in FIG. 3, the joint 18 includes a cap nut 42 at one end of a substantially L-shaped tubular joint body 40. The screw portion 42A of the cap nut 42 is screwed into a screw portion 12E formed at the other end of the cylindrical portion 12. An annular locking member 44 is disposed on the inner wall of the cap nut 42, and the protrusion 40 </ b> A of the joint body 40 is locked to the locking member 44. An annular seal member 46 is disposed between the longitudinal end face of the protrusion 40A of the joint body 40 and the longitudinal end face of the tubular portion 12, and the cap nut 42 and the joint body 40 are sealed. Has been.

  Next, the operation of the joint pipe 10 of the present invention will be described.

  A connecting portion 16 provided at one end of the tubular portion 12 is connected to the joint pipe 10 to a beer barrel (not shown). When cleaning the pipe and server downstream of the joint pipe 10, as shown in FIG. 3, the beer barrel (not shown) of the connection portion 16 is removed, and a substantially cylindrical sponge member 30 is formed in the connection portion 16. Set. Further, a cleaning tank 70 filled with a cleaning liquid (for example, water) is attached to the connecting portion 16. Then, as shown in FIG. 4, a predetermined gas (for example, carbon dioxide gas) is introduced, and a cleaning liquid is introduced into the flow path 14 of the joint pipe 10 from the connection portion 16 by gas pressure, whereby the valve body of the on-off valve 20. 26 is rotated downstream in the introduction direction, and the flow path 14 is opened. At this time, as shown in FIG. 4, the sponge member 30 passes through the on-off valve 20 together with the cleaning liquid by opening the valve body 26 and moves in the flow path 14. At this time, since the support portion 25 of the valve body 26 and the surrounding thickness are thinner than the thickness of the rubber plate 24, the support portion 25 is easily extended, and the valve body 26 is easily rotated downstream in the introduction direction.

  Further, a rigid auxiliary member 28 is fitted in the opening 26B of the valve body 26, and when the valve body 26 is opened, the conical protrusion 28C stably contacts the inner wall of the cylindrical portion 12 within a relatively wide range. . For this reason, the open state of the valve body 26 is stabilized in the liquid, and the sponge member 30 easily passes between the valve body 26 and the cylindrical portion 12. Thereby, it is possible to prevent or suppress the sponge member 30 from being caught near the valve body 26.

  The sponge member 30 that has passed through the valve body 26 moves in the flow path 14 of the cylindrical portion 12. At this time, the inner diameter of the small-diameter portion 12C of the cylindrical portion 12 is set to be smaller than the outer diameter of the sponge member 30, and the sponge member 30 is compressed and moves while contacting the inner wall of the small-diameter portion 12C. The inside of 12C is cleaned. Further, the sponge member 30 is sent from the joint pipe 10 through the joint 18 along the introduction direction of the cleaning liquid to the pipe and a server (not shown) on the downstream side of the pipe, and the pipe and the server are washed.

  In such a joint pipe 10, the beer barrel (not shown) connected to the connection portion 16 is removed, and then the sponge member 30 is set in the connection portion 16 and the cleaning tank 70 is attached. The piping and the server (not shown) can be efficiently cleaned. When the liquid is not introduced into the joint pipe 10 (when the pressure is not applied in the direction in which the sponge member 30 is passed), the valve body 26 is closed by the contact of the valve body 26 with the stepped portion 22, and the valve body 26 is closed. Can be prevented from leaking in the opposite direction (on the side of the connecting portion 16).

  On the other hand, FIGS. 5 and 6 show an on-off valve 100 used for a joint pipe according to a comparative example. In addition, the same code | symbol is attached | subjected to the member same as the joint pipe which concerns on one Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 5, the on-off valve 100 is formed with a slit S2 that is cut in a circular shape leaving a support portion 115 that is a part of a circle on the inner diameter side of the circumferential portion 24A of the rubber plate 24, and the slit S2 The inner circular portion is a valve body 106. The width of the slit S2 is formed smaller than the width of the slit S1 shown in FIG. Concave portions 117 are formed on both sides of the rubber plate 24 around the support portion 115 and the support portion 115. A rigid auxiliary member 108 having support portions 108A and 108B supported on the upper and lower surfaces of the rubber plate 24 is fitted in a circular opening 26B formed in the central portion of the rubber plate 24 of the valve body 106. . The rigidity auxiliary member 108 is formed in a substantially flat plate shape, and no protruding portion is provided on the cylindrical portion 12 side. Moreover, the outer diameter of the valve body 106 is set to 11.6 mm.

  In the joint pipe 120 provided with such an on-off valve 100, the valve body 106 of the on-off valve 100 is introduced by introducing the cleaning liquid into the flow path 14 of the joint pipe 120 from the connection portion 16 as shown in FIG. 6. It turns to the direction downstream side, and the flow path 14 is open | released. At this time, since the edge of the rigidity auxiliary member 108 of the valve body 26 hits the inner wall of the cylindrical portion 12, the open state of the valve body 26 is difficult to be stabilized in the liquid. For this reason, the sponge member 30 may be caught in the vicinity of the valve body 26.

  On the other hand, in this embodiment, when the valve body 26 is opened, the protruding portion 28C of the stiffness assisting member 28 stably contacts the inner wall of the cylindrical portion 12, and the open state of the valve body 26 is stable in the liquid. Therefore, it is possible to prevent or suppress the sponge member 30 from being caught near the valve body 26.

  In the above embodiment, the protruding portion 28C of the rigidity auxiliary member 28 has a conical shape. However, the present invention is not limited to this, and the protruding portion 28C of the rigidity auxiliary member 28 is formed on the inner wall of the cylindrical portion 12 when the valve body 26 is opened. Other shapes may be used as long as they are in stable contact.

It is sectional drawing which shows the joint pipe which concerns on one Embodiment of this invention. It is the top view and sectional drawing which show the rubber plate which comprises the on-off valve provided in the joint pipe shown in FIG. It is sectional drawing which shows the state which set the sponge member to the connection part of the coupling pipe shown in FIG. 1, and connected the washing tank. In the joint pipe shown in FIG. 1, it is sectional drawing which shows the process in which a sponge member moves the inside of the cylindrical part of a joint pipe. It is the top view and sectional drawing which show the rubber plate which comprises the on-off valve of a comparative example. FIG. 6 is a cross-sectional view showing a process in which the sponge member moves in the tubular portion of the joint pipe in the joint pipe shown in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Joint pipe 12 Tubular part 14 Flow path 16 Connection part 18 Joint 20 On-off valve 22 Step part 24 Rubber plate 25 Support part (support member)
26 Valve body 28 Stiffness assisting member 28C Protrusion 30 Sponge member 70 Cleaning tank (tank)

Claims (5)

A cylindrical portion having one end connected to the pipe and a flow path formed;
A connecting portion provided at the other end of the cylindrical portion and connected to the tank;
A valve body that is provided between the connection portion and the tubular portion and closes the flow path; and a support member that supports the end of the valve body so as to be rotatable only toward the tubular portion. An open / close valve,
The joint pipe in which the valve body is inclined so that the thickness decreases from the central portion toward the support member.   The valve body has a protruding portion that protrudes toward the cylindrical portion at the center, and has a shape that fits inward of a line connecting the deformation starting point of the support member and the protruding tip of the protruding portion. The joint pipe according to claim 1. Between the tubular portion and the connection portion, an inner diameter of the tubular portion is made larger than an inner diameter of the connection portion to form a stepped portion,
The on-off valve includes a rubber plate that is fixed to the stepped portion and can close the flow path, and forms a slit that is cut in a circular shape leaving a part of the rubber plate, and the part is The joint pipe according to claim 1, wherein the joint member is a support member and a circular portion is the valve body.   4. The valve body according to claim 1, wherein the valve body includes a disk and a conical rigidity auxiliary member that is attached to a central portion of the disk and prevents a backflow of liquid. 5. The joint pipe described.   The joint pipe according to claim 4, wherein an outer diameter of the rigid auxiliary member is set in a range of 40% to 80% of an inner diameter of the cylindrical portion.

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