JP5749893B2 - Check valve unit - Google Patents

Description

  The present invention relates to a check valve unit that can be detachably inserted and set as a unit through a joint casing in a required portion of a water pipe, and more specifically, a check configured as a unit by a joint casing at any part of the water pipe. The valve can be detachably fitted along the pipe water channel so that the check valve mechanism can be easily repaired or replaced at the time of maintenance or replacement.

  Conventionally, as shown in Patent Document 1, for example, a check valve is set on the secondary side of piping equipment such as a water meter, and in the piping mechanism in the vicinity of the main equipment for the purpose of preventing a water flow from flowing back to the main equipment. Therefore, it takes a lot of time and labor to attach and detach. Therefore, as shown in Patent Document 2, measures are also taken to easily attach and detach the check valve for replacement and repair.

  Since the valve body mechanism of the check valve operates every time water is passed, it is extremely worn out and needs to be replaced as appropriate.In the conventional method, the main body of the check valve is removed from the pipe, replaced with a new cartridge, and then replaced. The body case must be re-piped. Piping could only be done by a skilled plumber, requiring time and skill.

  As described above, in the check valve configuration disclosed in Patent Documents 1 and 2 for the check valve attachment / detachment replacement, the check valve must be removed from the pipe or the pipe must be separated even when performing inspection or the like. In addition, there is a problem that the setting position of the check valve needs to be piped in advance in consideration of the fitting space of the check valve in the water pipe.

For such a check valve attachment / detachment replacement, the applicant of the present application, as shown in Patent Document 3, sets a fitting space for fitting the fitting frame in the water pipe, and opens the fitting inlet to the water pipe surface. In addition, a proposal has been made to replace the check valve without removing the pipe by inserting a fitting frame containing the check valve cartridge into the fitting space so as to be detachable.
JP 2006-265990 A Japanese Utility Model Publication No. 05-75568 JP 2009-58055 A

  According to the invention described in Patent Document 3, the check valve can be set at an arbitrary position in the water pipe by the joint mechanism, and the check valve mechanism for replacement cleaning and the like can be attached and detached in a state close to one touch. ing.

  However, in the invention described in Patent Document 3, the water flow that passes through the check valve mechanism is bent from the water channel of the water pipe, and the structure of the joint body that fits the unit insertion frame becomes complicated, requiring extra labor for processing. In addition, there is a problem that a failure such as clogging due to bending of the water channel is likely to occur.

  Furthermore, for O-rings and D-rings used to seal the joint between the water pipe opening surface and the water channel opening surface of the unit insertion frame, the unit insertion frame of the same diameter as the water pipe water channel fits with one touch. There is a problem that a torsional load for attaching and detaching to / from the space is applied, and the seal of the joint portion becomes incomplete due to a non-return failure due to the displacement of the seal member or protruding cutting.

  That is, in the case of an elastic seal member such as synthetic rubber, the unit insertion frame must be pressed after being placed in the fitting space in order to seal the cylindrical end face, but it is forcibly pressed with the elasticity of the seal member when fitted. If you try to insert it, the volume of the seal member's squeezing allowance will move, and it will protrude from the fitting and fixing groove and will be pinched or broken, resulting in an incomplete seal leading to an accident such as water leakage, or the seal member will shift It will protrude inside the water channel and cause non-return failure.

  The present invention is to cope with the above-described problem, and a joint mechanism with water pipes on both sides of a fitting space provided with an opening on the upper surface for removably fitting a frame for fitting a check valve mechanism. A cylindrical shape in which a frame body of a unit insertion frame that is fitted with a check valve mechanism is fitted into a water passage of the joint body casing. The check valve is set along the axial center of the pipe water channel.

  Corresponding to torsional load applied to the seal member by attaching and detaching the unit insertion frame of the same diameter as the water channel of the water pipe to the fitting space with one touch, the metal ring is baked on the elastic member to the seal packing used as the seal member By molding or incorporating a high-performance resin (engineer plastic), the core material is installed to prevent partial compression of the seal member.

  Also, a seal packing insertion and fixing mechanism is provided on one of the joint body casing and the insertion frame so that the base of the seal packing is inserted and fixed, and the top surface of the seal packing is clamped to the corresponding surface of the other member. In this way, the joint surface is sealed so as to be able to come into contact with and separated from it. Crushing to ensure the crushing effect on the top surface.

  In addition, a fitting structure with a locking groove on the inner periphery is formed on the bottom of the cap that covers the fitting space fitting opening that opens to the water pipe, in response to difficult check valve installation and removal work in the meter box. In addition, a locking protrusion for locking in the locking groove of the cover cap is provided on the upper surface portion of the fitting frame, so that the check valve in the deep and narrow meter box can also be screwed on the cover cap. The check valve configured in the unit can be attached and detached simply by unraveling and picking up the cap.

  According to the present invention, the check valve along the axial direction of the pipe water channel can be set in any part of the water pipe through the joint casing by the configuration as described above. By attaching and detaching the frame, the check valve can be repaired and replaced without removing the piping.

  In addition, a metal core material is installed on the seal packing used as the seal member in response to the twisting load applied to the seal member by attaching and detaching the unit insertion frame of the same diameter as the water channel of the water pipe to the fitting space with one touch. As a result, there is an effect that the sealing at the cylindrical portion of the water channel of the casing is ensured, and water leakage and non-return failure can be greatly reduced.

Furthermore, the base of the seal packing is fixed to the insertion groove, and a resilient raised ridge is formed on the top surface, and the top surface is pressed onto the corresponding surface to seal the joint surface freely. Since it is configured, the uneven sealing force and unevenness of the top surface are prevented from adversely affecting the sealing surface, thereby ensuring a sufficient sealing effect.

1 illustrates an embodiment of the present invention, in which a joint casing, the unit insertion frame, a check valve mechanism, a seal packing, and a cap that covers a fitting space fitting inlet are disassembled. Exploded perspective view Similarly, it shows the structure and fitting relationship of the check valve unit insertion frame, and shows a state in which the unit insertion frame fitted with the check valve mechanism is fitted and set in the joint casing. Vertical sectional front view of the entire check valve unit Similarly, the longitudinal cross-sectional side view of the whole check valve unit which made the cross section crossing the water channel of the check valve unit of FIG. Similarly, it shows the structure and fitting relationship of the check valve unit insertion frame body according to the second embodiment, and shows a channel shaft in which the unit insertion frame fitted with the check valve mechanism is set in the joint body casing. A longitudinal sectional front view of the entire check valve unit taken along the section Similarly, a left side view and a longitudinal sectional front view of a unit insertion frame showing an embodiment of a gripper that is attached and detached with fingers on the upper surface of the unit insertion frame according to the third embodiment. Similarly, a left side view and a longitudinal sectional front view of a unit insertion frame showing an example of a gripper that is attached and detached with fingers on the upper surface of the unit insertion frame according to the fourth embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a joint casing, which is a joint mechanism 25a with water pipes on both sides of a fitting space 24 provided on the upper surface with a fitting opening 23 into which the unit fitting frame 2 for fitting the check valve mechanism 3 is detachably fitted. 25b is provided.

  In the upper part of the fitting space 24, the fitting opening 23 of the unit fitting frame 2 is opened, and a male screw 41 a and a screw engraved in the insertion portion 41 of the cap 4 covering the fitting opening are formed on the inner diameter of the fitting opening 23. The mating female screw 23a is engraved, and the top 23b of the opening edge has a convex seal shape raised in a bowl shape, and retains watertightness by biting into the gasket set on the lower surface of the flange portion 42 of the cap 4. It is like that.

  The unit insertion frame 2 is formed in a cylindrical shape that detachably fits in the fitting space 24 and constitutes a water passage along the axial direction of the pipe water channel, and support arms are provided on both outer sides of the cylindrical frame 2A. 2B and 2B are set to taper outward, and the upper ends of both support arms are locked to locking grooves 43a provided in the inner wall of the inner diameter recessed portion 43 of the insertion portion 41 of the cover cap 4. When the projecting piece 44 is provided and the support arms 2B and 2B are inserted into the inner diameter recessed portion 43 of the cap 4, the retaining projecting pieces 44 and 44 are fitted and locked in the locking groove 43a.

  Since the locking protrusion 44 freely rotates within the locking groove 43a, the cover cap 4 and the unit insertion frame 2 can be engaged and retracted between the male screw 41a and the female screw 23a while being in the engaged state. The fitting frame 3 can be attached to and detached from the fitting space 24.

  With this configuration, even in a narrow pit or box, the check valve unit 22 can be taken out by rotating the knob handle 45 on the upper surface of the cover cap to remove the fitting frame body 2 from the fitting space 24 and picking it up. The unit can be repaired and parts can be replaced without being restricted by space.

  Further, a guide projection 46 projects from the outer side of the cylindrical frame 2A and engages with a groove formed by the guide projection 12 provided on the corresponding inner wall of the fitting space 24 to be inserted into the cylindrical frame. 2A is guided into the fitting space 24, and the unit fitting frame body 2 is fixed in the space in a fixed direction and fixedly fitted.

  A fixed arm 2C protrudes from the upper surface of the cylindrical frame body 2A, and its front end flange 2D engages with an insertion portion 47 formed on the back surface of the cover cap 4, so that the unit insertion frame body 2 can be fitted into the space. 24 is stabilized.

  A valve body 31 is inserted into the cylindrical frame body 2 </ b> A as the check valve mechanism 3 and is covered with a valve seat 32. The valve body 31 is always in contact with the valve seat 32 by a spring 33 and is pressed and opened by the water flow from the primary side, but when the water pressure is applied from the secondary side, the valve body 31 is in pressure contact with the valve seat 32 to prevent backflow.

The joint portion between the secondary side end face opening 1a of the joint mechanism 25a communicating with the primary pipe water passage of the joint body casing 1 and the primary side water passage opening face 21 of the unit insertion frame 2 is a cylindrical frame 2A. When the base part of the seal packing 5 containing the core material 5a is fitted and fixed in the fitting groove 26 formed in the inner wall end of the inner wall, and the unit fitting frame body 2 is fitted into the fitting space 24, the seal packing 5 An elastic raised ridge 51 formed on the top surface of the joint is pressed and joined to the edge of the secondary side end face opening 1a of the joint mechanism 25a communicating with the corresponding primary side pipe water channel. The surface is sealed so that it can be contacted and separated.

As Example 2, the fitting groove 26 for fitting and fixing the base portion of the seal packing 5 is formed at the edge of the secondary side end face opening 1a of the joint mechanism 25a communicating with the pipe water passage on the primary side of the joint body casing 1. Thus, the end edge of the primary-side water channel opening surface 21 of the cylindrical frame 2A or the valve seat 32 of the check valve mechanism may be used as the corresponding pressure-tightening surface.

By doing so, since the seal packing 5 becomes a component member on the joint body casing 1 side, it is not necessary to lay the seal packing 5 of the cylindrical frame 2A every time the check valve mechanism 3 is replaced. The configuration of this embodiment is adopted corresponding to the setting environment of the check valve mechanism 3 and the wear frequency.

  In the third embodiment, the cylindrical frame 2A is locked to the locking groove 43a of the cover cap 4 by the support arms 2B and 2B of the first embodiment, and the engagement structure of the cover cap 4 and the fitting frame 2 is omitted. As a simple structure, a knob 6 as shown in FIG. 5 is formed on the upper part of the cylindrical frame 2A, the cover cap 4 is removed, the knob 6 is picked up with fingers, and the fitting frame 2 is inserted from the fitting space 24. Is to take out.

The third embodiment simplifies the structure of the insertion frame body 2 to save the manufacturing cost and has the advantage of the reliability of manual operation. The insertion frame body 3 is integrated with the cover cap 4. The work can be done carefully.

In Example 4, the omission structure of the engagement structure between the cover cap 4 and the fitting frame 2 is the same as that in Example 3, but the shape of the knob formed on the upper part of the cylindrical frame 2A is shown in FIG. In this structure, a pickup hole 7 into which a fingertip can be inserted is formed. Since the fingertip is inserted into the hole 7 and pulled up, the lifting force can be strengthened.

The present invention provides convenience for the installation of check valves that are extremely important in dealing with water distribution problems on water supply piping, and repairs and replaces check valves without removing complicated and troublesome piping. It has a high utility value on the water supply industry.

DESCRIPTION OF SYMBOLS 1 Joint body casing 1a Primary side opening part 12 of joint body casing Positioning guide protrusion 2 provided in inner wall of fitting space Unit insertion frame body 2A Cylindrical frame body 2B of unit insertion frame body Support arm 2C of cylindrical frame body Fixed arm 2D of cylindrical frame Flanged disk 21 at the tip of fixed arm Primary side water channel opening surface 22 of fitting frame unit Check valve unit 23 Fitting space fitting inlet 23a Fitting space fitting female screw 23b Fitting space fitting inlet Top 24 of opening edge Fit space 25a Primary side joint mechanism 25b of joint body casing Secondary side joint mechanism 26 of joint body casing Seal packing insertion groove 3 of cylindrical frame 3 Check valve mechanism 31 Valve body 32 of check valve Check valve valve seat 33 Spring 4 Cover cap 41 Cover cap insert portion 41a Cover cap insert male screw 42 Cover cap flange portion 43 Inner side recessed portion 43a of the lid cap insertion portion Locking groove 44 of the lid cap inner diameter recessed portion Locking protrusion 45 on the upper end of the support arm Covering cap grip handle 46 Guide projection 47 on the outer side of the cylindrical frame body Flange disc on the back surface of the lid cap Insertion part 5 Seal packing 5a Metal core material 51 of the seal packing Swelling protrusion 6 on the top surface of the seal packing Upper knob 7 of the cylindrical frame Pickup hole

Claims (3)

An insertion frame in which a seal packing insertion and fixing mechanism is provided on the opening surface of the primary side water channel of the cylindrical frame body in which the check valve mechanism is detachably mounted, and a base portion of the seal packing in which the core material is embedded is inserted and fixed. A joint mechanism for water pipes is provided on both sides of a fitting space in which an opening for fitting the unit and the fitting frame unit is provided on the upper surface, and a water passage along the axial direction of the pipe water channel by fitting the fitting frame unit Check valve unit comprising a joint body casing A raised ridge is formed on the top surface of the seal packing that is fitted and fixed to the primary side water channel opening surface of the frame, and the top surface of the seal packing is formed on the secondary side end surface of the joint mechanism that is coupled to the water pipe on the primary side. 2. The check valve unit according to claim 1, wherein the check surface unit is configured so as to seal the joint surface in a freely detachable manner by pressing the surfaces.   A fitting structure in which a locking groove is provided on the inner periphery of the lower part of the cap that covers the fitting space fitting opening that opens in the joint body casing, and the locking groove of the cover cap is formed above the fitting frame. 3. A check valve unit according to claim 1, further comprising a locking protrusion having a locking claw for locking to the check valve.

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