JP2012046935A - Fitting structure of check valve in meter holder for water supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a component pressing a check valve on the axis of a pipe has to be removed by a tool in order to connect a flange body of a meter edge with an outer shell body of the check valve by bolting and attach/remove the check valve in the axial direction of the pipe, but the check valve cannot be set because the tool cannot be used due to the rotational range of the tool interfering with a protrusion passing through a flange hole.SOLUTION: A check valve cartridge is fitted in a space formed in the end face of a secondary side holder, and a plurality of bolt adapters are detachably implanted in the outer shell periphery of the fitting space, while the tips of the bolt adapters are fitted in fitting holes set corresponding to implanting positions of the bolt adapters in a secondary side end flange body of a meter to be supported. Thereby, the flange body and an end face of the secondary side holder are joined to each other to fit the check valve into a meter holder.

Description

  The present invention relates to a check valve fitting structure when a check valve is set in a water meter holder that removably supports both ends of a water meter having a nominal diameter of 50 or more and is connected to a pipe section. .

  Conventionally, when the nominal diameter is 50 or more, a check valve or a gate valve has been installed on the secondary side of the meter device in order to avoid a large amount of return water when the meter device is removed from the water meter holder. However, in the check valve that is detachable from the upper part of the pipe, there is no space for fitting both the check valve and the gate valve in the meter box, so a structure has been adopted in which the check valve is removed in the axial direction of the pipe. ing.

As a specific structure of the type that can be attached and detached in the axial direction of the pipe, for example, as described in Patent Document 1, a flange body is provided at the end of the meter and at the end of the pipe flow path, and the flange body through the bolt is inserted into the flange hole The end of the meter and the pipe flow path are joined by bolting, but the secondary check valve is not set.
JP 2005-60963 A

  In other words, in order to attach and detach the check valve of the meter holder in the axial direction of the pipe, if the flange body of the meter unit and the check valve outer shell are joined by bolting, there is no problem when the check valve is fitted. However, as shown in FIG. 5, the secondary fitting surface 2b and the flange body 5 at the end of the meter are in close contact with each other, and a part for holding the check valve to be removed on the shaft of the pipe is screwed with a tool such as a pipe wrench. When the screw is loosened and removed, as shown in Fig. 4, the projections such as the heads of the bolts D that pass through both flange holes interfere with the rotation range of the tool and the tool cannot be used. There is a problem that can not be.

  The present invention is intended to address the above-described problems, and a check valve cartridge is fitted in a space formed on the end surface of the secondary holder, and a plurality of bolt adapters are provided around the outer shell of the fitting space. It is detachably planted, and its tip is fitted into a fitting hole set in accordance with the planting position of the bolt adapter in the secondary side end flange body of the supported meter, and the flange body 2 The end face of the secondary holder was joined and a check valve was fitted to the meter holder.

  By configuring in this way, it is possible to remove the threaded engagement between the base of the bolt adapter and the implantation screw set around the outer shell of the fitting space, so that the flange end of the secondary end flange body of the supported meter can be formed. The tip of the inserted bolt adapter can be extracted, and the check valve retainer that covers the check valve fitting space and fixes the check valve cartridge can be removed.

As described above, without bolting the outer periphery of the check valve outer shell directly to the flange of the meter device, the end of the bolt adapter is inserted into the flange hole in a free state, and the check valve of the meter holder is connected to the pipe Since it is designed to be attached and detached in the axial direction, the check valve can be quickly attached and detached, and the check valve and gate valve can be set in a water meter holder with a nominal diameter of 50 or more. .
The bolt adapter of the present invention can be applied not only to the creation of a check valve fitting space, but also to the creation of a fitting space for equipment when fitting is difficult due to the short distance between surfaces.

The Example of this invention is shown, The secondary meter holder structure part which shows the relationship between the cartridge fitting space of the secondary side holder end surface which set the gate valve, the non-return valve cartridge, the non-return valve presser, and the bolt adapter Exploded vertical side view Similarly, a vertical side view of a secondary meter holder structure showing a state in which a check valve cartridge is fitted in the secondary meter holder and a bolt adapter is fitted. Similarly, the meter box with the main part in a vertical section showing the state of the holder part when the meter holder is stored in the meter box and the meter device is mounted, and the entire side view of the meter unit and the meter holder. Similarly, the front view from the axial direction of a flange body which shows the state in which protrusions, such as a bolt head, interfere with the rotation range of a tool in the bolting joint part of a meter instrument flange body in a conventional example Similarly, the longitudinal cross-sectional side view of the secondary meter holder structure part which shows the fastening ridge of the meter instrument flange body and meter holder end gate valve in the conventional example

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a main body of a meter holder, which is composed of a pair of a primary side holder 1a and a secondary side holder 1b facing each other, The end faces are provided with fitting portions 2a and 2b that fit into the end of the meter A, and the primary fitting portion 2a is operated to advance and retreat with respect to the end fitting end of the meter A. The fastening cylinder B is fitted, and when the fastening cylinder B advances, the primary side holder 1a is crimped to the both ends of the water meter A as the fastening holder and the secondary side holder 1b is the receiving holder. Is supported at the middle axis level of the meter holder 1.

  A fitting space 31 for fitting the check valve cartridge 3 is formed on the end surface of the fitting portion 2b of the secondary holder 1b, and a flange portion 33 that fits the holder base 11 at the base portion of the outer shell portion 32 thereof. Furthermore, the joining structure part 12 of the outer shell 34 of the gate valve C and the secondary side pipe D is configured.

  The attachment between the holder base 11 and the holder flange portion 33 is performed by tightening the male screw rod 36 and the nut 37 that are inserted through the flange hole 35 of the flange portion 33 and the through hole formed in the holder base 11. A female screw hole 41 drilled in the base of the bolt adapter 4 is screwed into the tip of the male screw rod 36 projecting from the bolt adapter 4 so that the bolt adapter 4 is implanted.

  A flange body 5 is set at the secondary side end of the meter device A, and a flange hole 51 is opened at a position corresponding to the flange hole 35 provided in the holder flange portion 33. After the check valve cartridge 3 is inserted into the fitting space 31, the inner peripheral female screw of the check valve retainer 6 and the male screw of the outer shell 32 of the fitting space 31 are screwed together to cover the holder base. 11 and the flange hole 35 are aligned and the male screw rod 36 is inserted, and is fastened and fixed by the nut 37.

  The base of the bolt adapter 4 is screwed onto the tip of the male screw rod 36 protruding from the nut 37, and the bolt adapter 4 is planted on the outer periphery of the outer shell of the fitting space 31. 51, the fastening cylinder B of the primary side holder 1a is advanced, the primary side end of the meter A is pushed, and the secondary side end is pressed against the end surface of the fitting part 2b of the secondary side holder 1b. Let

  Since the front ends of the bolt adapters 4 are inserted into the corresponding holder base flange holes 51 in a free state, the check valve holder 6 in which the flange body 5 of the meter A is the end face of the fitting portion 2b. And the check valve cartridge 3 is stably fixed in the fitting space 31 in which the check valve cartridge 3 is fitted.

  The check valve retainer 6 has a through hole 61 that is joined to the secondary side water passage of the meter A, and the secondary side end of the check valve cartridge 3 includes a valve seat portion 38 and a valve body 39. Is a fitting portion 62 into which is inserted. Accordingly, water from the primary side passes through the meter device A, pushes the valve body 39 urged from the through hole 61 in the closing direction, passes through the water channel of the gate valve C, and flows into the secondary side pipe 13. To do.

  When the check valve cartridge 3 is removed, the water flow is stopped by the primary side gate valve D, the water channel of the return water is closed by the secondary side gate valve C, and then the fastening cylinder B of the primary side holder 1a is removed. The bolt adapter 4 can be easily removed by removing the meter A by retracting it with the operation handle 42 and further unscrewing the bolt adapter 4 and the male screw rod 36 that are not restricted in rotation.

  If the bolt adapter 4 is removed, the check valve retainer 6 can be easily dissociated because the male screw on the outer periphery of the outer shell portion 32 of the fitting space 31 is screwed together. The stop valve cartridge or the check valve mechanism can be easily taken out and repaired or replaced.

  The check valve fitting structure in the water meter holder according to the present invention is a holder for a water meter having a nominal diameter of 50 or more, particularly when there is no space for fitting both the check valve and the gate valve in the meter box. When a check valve is to be set in the pipe, it is possible to adopt a structure in which the check valve is removed in the axial direction of the pipe, so that it has a high utility value in the water supply industry.

DESCRIPTION OF SYMBOLS 1 Meter holder main body 1a Primary side holder 1b Secondary side holder 11 Holder base 12 Joint structure part with secondary side piping 13 Secondary side connection piping 2a Primary side meter end fitting part 2b Secondary side meter end Part fitting part 3 Check valve cartridge 31 Fit space 32 Outer shell part 33 in the fit space Holder flange part 34 Outer shell 35 of the gate valve Flange hole 36 in the holder flange part Male screw rod 37 Male screw rod nut 38 Cartridge Valve seat part 39 Check valve body 4 Bolt adapter 41 Female screw hole 42 of bolt adapter base part Fastening cylinder advancing / retreating handle 5 Flange body 51 of meter instrument Flange hole 6 of meter instrument flange body Check valve retainer 61 Check valve retainer Through-hole 62 Non-return valve fitting check valve fitting part 63 Non-return valve hold female screw A screwed into the outer shell outer periphery of the fitting space A Water meter B Primary Fastening tube clamping holder C partition valve D meter unit fastening bolts P Meter Box

Claims (1)

  The check valve cartridge is fitted in the space formed on the end surface of the secondary holder, and a plurality of bolt adapters are removably planted around the outer shell of the fitting space. The secondary side end flange body is fitted into a fitting hole set corresponding to the planting position of the bolt adapter, and the flange body and the end surface of the secondary side holder are joined to each other so as to return to the meter holder. Non-return valve fitting structure characterized by fitting a valve

Images