JP2020204386A - Pipe connection member - Google Patents

Abstract

To provide a pipe connection member which includes: a casing which has an inflow port and an outflow port; a strainer which is disposed in the casing; an opening for putting in/out the strainer which is formed in the casing; and a lid member which is detachably fixed to the casing and covers the opening from the outside of the casing, and the resin pipe connection member which does not have a possibility of being broken due to an internal pressure rise accompanying freezing.SOLUTION: A pipe connection member includes: a casing which has an inflow port and an outflow port; a strainer which is disposed in the casing; an opening for putting in/out the strainer which is formed in the casing; and a lid member which is detachably fixed to the casing and covers the opening from the outside of the casing. The strainer is slidably engaged with the opening of the casing by forming a piston and has a seal member which stops water of a slide contact section between the piston formed by the strainer and the opening of the casing. The strainer is elastically supported in a piston movement direction by the lid member.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pipe connecting member.

A casing having an inlet and an outlet, a strainer arranged in the casing, an opening for taking in and out the strainer formed in the casing, and a detachably fixed opening to the casing from the outside of the casing. A resin pipe connecting member including a covering lid member has been conventionally used. In order to prevent damage due to unexpectedly high water pressure application due to pressure fluctuation of the water supply source or malfunction of the water supply equipment, a pipe connection member provided with a pressure relief valve has also been conventionally used, as disclosed in Patent Document 1, for example. in use.

Japanese Unexamined Patent Publication No. 2018-004203

In cold regions, damage to pipe connection members close to the external environment due to an increase in internal pressure due to freezing becomes a problem. Since freezing progresses from the outer casing side toward the inner strainer, the pressure relief valve near the outside freezes at a relatively early stage of freezing progress, and loses the function of releasing the pressure increase due to freezing. Therefore, even if the resin pipe connection member is provided with a pressure relief valve, it may be damaged due to an increase in internal pressure due to freezing when used in a cold region.
The present invention has been made in view of the above problems, and has a casing having an inlet and an outlet, a strainer arranged in the casing, an opening for taking in and out the strainer formed in the casing, and a detachment. It is a resin pipe connecting member that is preferably fixed to the casing and includes a lid member that covers the opening from the outside of the casing, and even when used in a cold region, there is a risk of damage due to an increase in internal pressure due to freezing. It is an object of the present invention to provide a pipe connecting member.

In order to solve the above problems, in the present invention, a casing having an inlet and an outlet, a strainer arranged in the casing, and an opening for taking in and out the strainer formed in the casing can be detached from each other. A lid member fixed to the casing and covering the opening from the outside of the casing is provided, and the strainer forms a piston and slidably engages with the opening of the casing, and the strainer forms the piston and the casing. The strainer provides a resin pipe connecting member characterized by being elastically supported by a lid member in the piston moving direction, provided with a sealing member that stops the sliding contact portion with the opening.
By moving the strainer forming the piston, it absorbs the increase in internal pressure due to freezing and prevents damage to the resin pipe connection member.

In a preferred embodiment of the present invention, a spring is disposed between the lid member and the strainer.
In a preferred embodiment of the present invention, the lid member is an out-of-plane deformable plate member.
By disposing a spring between the lid member and the strainer, or by forming the lid member with an out-of-plane deformable plate member, the strainer forming the piston can be moved in the longitudinal axis direction.

It is sectional drawing of the pipe connection member which concerns on embodiment of this invention. (A) indicates normal operation, and (b) indicates freezing. It is a structural drawing of the pipe connection member which concerns on other Examples of this invention. (A) is a cross-sectional view during normal operation, (b) is a cross-sectional view of (a) bb, and (c) is a top view of the lid member. d) and (e) are top views of modified examples of the lid member. It is a structural drawing at the time of freezing of the pipe connection member of FIG. (A) is a cross-sectional view, and (b) is a bb arrow view of (a) showing a part in cross section. It is sectional drawing of the pipe connection member which concerns on another Example of this invention.

As shown in FIG. 1A, the pipe connecting member 1 is formed in a resin casing 4 having an inflow port 2 and an outflow port 3, a strainer 5 arranged in the casing 4, and a casing 4. A thick resin lid member that is screwed into the opening 6 for inserting and removing the strainer and the large diameter portion 6a of the opening 6 so as to be detachable and fixed to the casing 4 and covers the opening 6 from the outside of the casing 4. It is equipped with 7.
The strainer 5 includes a piston head 5a, a plurality of legs 5b discretely arranged in the circumferential direction and erected on the peripheral edge of the piston head 5a, a tubular wire mesh 5c sandwiched between the plurality of legs 5b, and a piston head 5a. It is an assembly forming a piston composed of an O-ring 5d fitted in a peripheral groove of the above.
The piston head 5a is slidably engaged with the small diameter portion 6b of the opening 6 and the central opening 7a of the lid member 7. The sliding contact portion between the piston head 5a and the small diameter portion 6b of the opening 6 is stopped by the O-ring 5d. A spring 8 is arranged in the gap S between the piston head 5a and the lid member 7. The head of the screw 9 screwed to the piston head 5a engages with the step portion 7b formed around the central opening 7a of the lid member to prevent the strainer 5 from being separated from the lid member 7. The strainer 5 is elastically supported in the piston moving direction by the lid member 7 that indirectly abuts on the piston head 5a via the spring 8 and the inner step portion 6c of the opening 6 that abuts on the end of the leg portion 5b. There is.
The pipe connecting member 1 includes a water stop valve 10 that is operated during maintenance of the strainer 5. The pipe connecting member 1 is known for further preventing damage due to unexpectedly high water pressure application due to pressure fluctuation of the water supply source connected to the inflow port 2 or a malfunction of the water supply device connected to the outflow port 3. The pressure relief valve pressure 11 is provided.

The operation of the pipe connecting member 1 will be described.
The water flowing in from the inflow port 2 flows through the flow path formed in the casing 4, passes through the strainer 5, foreign substances such as iron rust are removed, and flows out from the outflow port 3, and the pressure reducing valve, the solenoid valve, and the like are closed. It is supplied to the water supply equipment via.
When maintaining the strainer 5, the water stopcock 10 is screwed in to close the passage extending from the inflow port 2. Next, the lid member 7 is removed from the case ig 4, and the strainer 5 prevented from being detached from the lid member 7 is taken out from the casing 4. After cleaning the strainer 5, the lid member 7 and the strainer 5 that are prevented from being separated from each other are attached to the casing 4, and the water stop valve 10 is twisted in the opposite direction to open the passage extending from the inflow port 2.
When an unexpectedly high water pressure occurs due to a pressure fluctuation of the water supply source connected to the inflow port 2 or a malfunction of the water supply device connected to the outflow port 3, the pressure relief valve pressure 11 operates in the casing 4. Water is discharged to the outside to reduce the internal pressure of the casing to prevent damage to the resin casing 4 and the lid member 7.
When the pipe connecting member 1 is used in a cold region, the pipe connecting member 1 close to the external environment may freeze. In this case, since freezing progresses from the outer casing 4 side toward the inner strainer 5, the pressure relief valve 11 near the outside freezes at a relatively early stage of freezing progress, and has a function of releasing the increase in internal pressure due to freezing. You may lose. Even in this case, as shown in FIG. 1 (b), the strainer 5 forming the piston moves while compressing the spring 8, so that the volume of the water storage space in the casing 4 increases and the internal pressure rises due to freezing. Is absorbed to prevent damage to the resin casing 4 and the lid member 7.

As shown in FIGS. 2 (a) to 2 (c), instead of the thick resin lid member 7 and the spring 8, a lid formed of a thin metal plate material whose both ends are screw-fixed to the casing 4 The member 7'may cover the opening 6 of the casing 4. In this case, the lid member 7'directly contacts the piston head 5a without the intervention of the spring material. The strainer 5 is elastically supported in the piston moving direction by the lid member 7'that comes into direct contact with the piston head 5a and the inner step portion 6c of the opening 6 that comes into contact with the end of the leg portion 5b. When the internal pressure rises due to freezing, as shown in FIG. 3, the strainer 5 forming the piston moves while deforming the lid member 7'outside the plane, increasing the volume of the water storage space in the casing 4 and causing freezing. It absorbs the accompanying increase in internal pressure and prevents damage to the resin casing 4.
In order to facilitate out-of-plane deformation of the lid member 7', a notch 7a'is formed in the lid member 7'as shown in FIG. 2 (d), or the lid member 7 is formed as shown in FIG. 2 (e). An opening 7b'may be formed in the'.
As shown in FIG. 4, the present invention is also applicable to a pipe connecting member 1'without a pressure relief valve. In FIG. 4, the member with the reference number 12 is a check valve.

The present invention can be widely used for pipe connecting members used under cold conditions.

1, 1'Piping connection member 2 Inflow port 3 Outlet 4 Casing 5 Strainer 5a Piston head 5b Leg 5c Wire mesh 5d O-ring 6 Strainer opening for putting in and out 6a Large diameter part 6b Small diameter part 6c Relief part 7, 7 'Lid member 7a Central opening 7b Step 7a' Notch 7b'Opening 8 Spring 9 Screw 10 Water stop valve 11 Pressure relief valve 12 Check valve S Gap

Claims (3)

A casing having an inlet and an outlet, a strainer arranged in the casing, an opening for taking in and out the strainer formed in the casing, and a detachably fixed opening to the casing from the outside of the casing. A sealing member provided with a lid member for covering, the strainer forming a piston and slidably engaging with the opening of the casing, and stopping water at a sliding contact portion between the piston formed by the strainer and the opening of the casing. The strainer is a resin pipe connecting member characterized by being elastically supported in the piston moving direction by a lid member. The pipe connecting member according to claim 1, wherein a spring is disposed between the lid member and the strainer. The pipe connecting member according to claim 1, wherein the lid member is an out-of-plane deformable plate member.

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