JP2019207117A - Water service meter reproduction method and water service meter - Google Patents

Abstract

To provide a water service meter reproduction method capable of improving visibility in metering concerning a reproduced water service meter.SOLUTION: A water service meter includes: a lower case incorporating a flow rate measurement part and having an upper opening; and a register box to be fitted into the lower case so as to clog the opening of the lower case. A reproduction method of the water service meter includes: a cleaning step of cleaning the lower case; a sealing step of water-tightly sealing the flow rate measurement part in a state where the register box is fitted into the lower case; and a mounting step of mounting a cover for holding an indication unit that displays an integrated flow rate to be measured by the flow rate measurement part inside the register box in a state where the indication unit is rotatably stored inside the register box.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a water meter reproduction method and a water meter.

  A pressure receiving plate is placed inside the upper part of the lower case with a built-in flow rate measuring unit via a seal member, and then the pressure receiving plate fixing ring is screwed onto the female threaded portion carved on the upper inner side of the lower case to fix the pressure receiving plate. A pressure receiving plate is pressed and fixed by a ring, an integrated flow rate display unit is rotatably mounted on the pressure receiving plate, and a cover holding the integrated flow rate display unit is rotatably fitted on the outer periphery of the lower case. There is known a dry-type water meter in which a cover fixing ring is fitted on the outer periphery of the cover so as not to be detached from the lower case (Patent Document 1).

  A copper alloy lumber containing Bi or Bi-Se is immersed in an aqueous solution having a nitric acid concentration of 20 to 27 wt% and the balance being water, and is subjected to a chemical polishing treatment, and an oxide film or patina adhering to the surface of the copper alloy lumber. Also known is a method for reclaiming copper alloy lumber such as a water meter that removes and recycles deposits (Patent Document 2).

Japanese Patent No. 4156732 JP 2008-88526 A

  An object of this invention is to provide the reproduction method of the water meter which can improve the visibility at the time of meter-reading in the regenerated water meter.

In order to solve the above-mentioned problem, the water meter re-production method according to claim 1,
A water meter reproduction method comprising a lower case with a built-in flow rate measuring unit and opened upward, and a register box fitted into the lower case so as to close the opening of the lower case,
A cleaning step of cleaning the lower case;
A sealing step for watertightly sealing the flow rate measurement unit in a state where the register box is fitted in the lower case;
A mounting step of mounting a cover for holding the instruction unit in the register box in a state in which the instruction unit for displaying the integrated flow rate measured by the flow rate measurement unit is rotatably accommodated in the register box;
It is characterized by that.

The invention according to claim 2 is a method of regenerating a water meter according to claim 1,
Before the cleaning step, comprising a removal step of removing the lower case from the used water meter,
It is characterized by that.

Invention of Claim 3 in the reproduction method of the water meter of Claim 1,
In the sealing step, the upper case having a female screw portion is screwed to the male screw portion formed on the outer peripheral surface of the opening of the lower case, so that the register box is connected to the lower case by the upper case. Press against the upper end surface of the opening to seal the flow rate measurement unit in a watertight manner,
It is characterized by that.

The invention according to claim 4 is the water meter reproduction method according to any one of claims 1 to 3,
The register box is compatible with the register box fitted in the lower case removed from the used water meter.
It is characterized by that.

Invention of Claim 5 is the reproduction method of the water meter of Claim 4,
The pair of resistance ribs having a triangular cross section provided along the diametrical direction outside the circular bottom surface of the register box were fitted in the lower case, the height and angle of which were removed from the used water meter. It is formed to be compatible with the height and angle of the resistance rib provided outside the circular bottom surface of the register box.
It is characterized by that.

The invention according to claim 6 is the water meter reproduction method according to claim 1,
In the mounting step, the cover is rotatably mounted together with the instruction unit by snap-fitting the cover to the outer surface of the upper case.
It is characterized by that.

In order to solve the problem, the water meter according to claim 7 is:
Reproduced by the water meter reproduction method according to any one of claims 1 to 6, using the lower case removed from the used water meter.
It is characterized by that.

  According to the first and seventh aspects of the invention, it is possible to improve the visibility at the time of meter reading by changing the indicating unit in a direction in which the indicator unit is easy to see in the regenerated water meter.

  According to invention of Claim 2, the lower case of the used water meter can be reused.

  According to the third aspect of the present invention, it is possible to separate the indicating unit and fix only the register box to the lower case to seal the flow rate measuring unit in a watertight manner.

  According to the fourth and fifth aspects of the invention, compared to the case where the register box is not compatible, the development man-hours of the water meter to be reproduced can be reduced.

  According to the invention described in claim 6, the indicating unit can be rotatably mounted.

It is a longitudinal cross-sectional view which shows the whole structure of the water meter reproduced. It is a flowchart which shows an example of the process of reproducing the used water meter. It is a longitudinal cross-sectional view which shows the whole structure of the water meter before being reproduced. It is an exploded sectional view showing the important section composition of a water meter before being reproduced. (A) is a top view of a lower case, (b) is a longitudinal cross-sectional view of a lower case. (A) is a longitudinal cross-sectional view of a register box, (b) is a bottom view of a register box. (A) is a top view of an upper case, (b) is a longitudinal cross-sectional view of an upper case. (A) is a perspective view which shows the external appearance of an instruction | indication unit, (b) is a longitudinal cross-sectional view which shows the internal structure of an instruction | indication unit. (A) is a top view of a cover and a lid | cover, (b) is a longitudinal cross-sectional view of a cover and a lid | cover. It is a cross-sectional schematic diagram which shows the assembly method of a water meter. It is a longitudinal cross-sectional view which shows the whole structure of a double box type water meter.

Next, specific examples of embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.
In the following description using the drawings, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones, and are necessary for the description for easy understanding. Illustrations other than the members are omitted as appropriate.

(1) Configuration of Water Meter FIG. 1 is a longitudinal sectional view showing the overall configuration of a water meter 1 to be reproduced. Hereinafter, the overall configuration and operation of the water meter 1 that is reproduced by the reproduction method according to the present embodiment will be described with reference to the drawings.

(1.1) Overall configuration of the water meter 1 to be reproduced The water meter 1 has a lower case 10 removed from the used water meter 1A (see FIG. 3). An inlet 11 and an outlet 12 are formed.
A flow rate measuring unit R having an inlet 11 and an outlet 12 is defined in the lower half of the internal space of the lower case 10, and an impeller having a drive-side magnet 22 at the upper part of the shaft in the flow rate measuring unit R. 20 is rotatably supported by the pivot shaft 14.

  In the upper half of the inner space of the lower case 10, the register box 30 is fitted in a state where the register case 30 is pressed by the upper case 40 via the gasket G 1 and is insulated from the flow rate measuring unit R, and the shaft portion 21 of the impeller 20. The upper end of each of the two enters into a recess 30 a formed at the center of the lower surface of the register box 30.

In the register box 30, a mechanical indication unit 50 comprising a gear train is rotatably accommodated. The instruction unit 50 includes a lower base plate 51, an upper base plate 52, a magnet gear 53 to which a magnet 54 is attached, a gear train 55 (partially not shown), a pointer 56, a number wheel 57, and a lens cap 58.
The magnet 54 of the magnet gear 53 and the drive-side magnet 22 of the impeller 20 face each other across the bottom wall 30b of the register box 30 and are magnetically coupled (hereinafter referred to as magnet coupling M). .

A cover 60 is rotatably fitted to the upper case 40 on the instruction unit 50, and a lid 62 is attached to the cover 60 by a pin 61 so as to be opened and closed.
Further, the cover 60 can rotate integrally with the instruction unit 50 by engaging with the lens cap 58.

(1.2) Operation of Water Meter The water meter 1 configured as described above is used with its inlet 11 and outlet 12 connected to an upstream water pipe and a downstream water pipe (not shown). Is done. The tap water flowing in from the inflow port 11 flows into the lower case 10 while removing foreign matter by the strainer S, rotates the impeller 20 according to the amount of water, and then flows out of the lower case 10 from the outflow port 12.

  At this time, the rotation of the impeller 20 is transmitted to the indicating unit 50 via the magnet coupling M, and the pointer 56 is rotated via the gear train 55 and the number wheel 57 is rotated. The accumulated flow value of tap water that has passed through is displayed.

(2) Water Meter Reproduction Method FIG. 2 is a flowchart showing an example of a process for regenerating a used water meter, FIG. 3 is a longitudinal sectional view showing the entire configuration of the water meter before being regenerated, and FIG. Is an exploded cross-sectional view showing the configuration of the main part of the water meter before re-production, FIG. 5 (a) is a plan view of the lower case 10, (b) is a vertical cross-sectional view of the lower case 10, and FIG. 7B is a bottom view of the register box 30, FIG. 7A is a plan view of the upper case 40, FIG. 7B is a vertical sectional view of the upper case 40, and FIG. FIG. 9B is a longitudinal sectional view showing the internal configuration of the instruction unit 50, FIG. 9A is a plan view of the cover 60 and the lid 62, and FIG. 9B is a plan view of the cover 60 and the lid 62. FIG. 10 is a schematic cross-sectional view showing a method for assembling the water meter 1. .
Hereinafter, the reproduction method of the water meter 1 will be described with reference to the drawings.

  According to the law (measurement law), the effective period of use of water meters is defined as 8 years from the date of certification of production certification, and it is obliged to replace them regularly (once every 8 years). The lower case made of a copper-based metal is currently recovered with 8 years as one cycle and is used repeatedly for 2 or 3 cycles.

  In the water meter reproduction method according to the present embodiment, the used water meter 1A is disassembled, and as shown in FIG. 2, the removal process S1, the cleaning process S2, the sealing process S3, the mounting process S4, and the adjusting process. A series of processing and assembly are performed so that each process of S5 is performed, and the water meter 1 is reproduced using the lower case 10 removed from the used water meter 1A.

(2.1) Removal step As shown in FIG. 3, in the used water meter 1A, the indication unit 50A is pressed and fixed by the upper case 40A through the glass plate 70 in the register box 30A and is incorporated in a non-rotatable manner. ing. Further, the lower case 10 that rotatably supports the impeller 20 is formed with the male screw portion 16 of the lower case 10 that is screwed with the female screw portion 41 (see FIG. 4) of the upper case 40A on the outer peripheral surface of the opening. Yes.

  As shown in FIG. 4, the water meter 1A configured as described above is screwed with the male screw portion 16 and the female screw portion 41 of the lower case 10 so that the instruction unit 50A is attached to the lower case 10 together with the register box 30A. The upper case 40A is removed from the lower case 10 by rotating the fixed upper case 40A counterclockwise.

When the upper case 40A is removed, the instruction unit 50A and the register box 30A can be taken out upward from the opening of the lower case 10, and are taken out from the lower case 10.
Thereafter, the impeller 20 and the pivot shaft 14 which are rotatably supported by the pivot shaft 14 of the lower case 10 are removed, and the lower case 10 used for reproduction remains.

As shown in FIG. 5, the lower case 10 is formed as a cylindrical cylinder having an inner bottom portion 13 and an upper end being opened, and a flow rate measuring unit R that houses the impeller 20, and on the other hand, a flow rate measuring unit R. The inflow port 11 connected to, and the outflow port 12 connected to the flow rate measuring unit R on the other side are integrally formed.
A support step 15 for supporting a flange 33 (see FIG. 6) provided in the register box 30 is formed on the inner surface side of the upper part of the flow rate measuring unit R, and an upper case 40 is screwed on the outer surface side. A male screw portion 16 is formed.

(2.2) Cleaning Step In the cleaning step S2, the lower case 10 taken out from the used water meter 1A is immersed in a chemical polishing liquid obtained by adding a surfactant to sulfuric acid or hydrogen peroxide and sulfuric acid. As a result, the oxide film formed on the inner surface forming the internal space of the lower case 10 is dissolved and removed.

(2.3) Sealing Process As shown in FIG. 6, the register box 30 used for reproduction is a register box in which the height H and the angle Θ of the resistance rib 31 are used in the disassembled water meter 1A. It is designed to be compatible with the height H and the angle Θ of the 30A resistance rib 31A and is formed by molding using a synthetic resin.

In the sealing step S3, the register box 30 created in this way is inserted into the lower case 10 in a state where the impeller 20 is cleaned and rotationally supported, and the upper case is inserted into the male screw portion 16 of the lower case 10. The register box 30 is fixed to the lower case 10 by screwing 40 female thread portions 41.
As shown in FIG. 7, a collar portion 43 extending inward in the radial direction is formed on the upper case 40. When the upper case 40 is screwed into the male threaded portion 16 of the lower case 10 with the female threaded portion 41, the flanged portion 43 causes the flanged portion 33 of the register box 30 fitted from the upper opening of the lower case 10 to be viewed from above. The register box 30 is pressed to fix the register box 30 to the lower case 10, and the flow rate measuring unit R is sealed in a watertight manner.

(2.4) Mounting Step In the mounting step S4, the pre-assembled instruction unit 50 is rotatably inserted into the register box 30 fixed to the lower case 10.

  As shown in FIG. 8, the instruction unit 50 includes a lower base plate 51 that houses the instruction mechanism unit 510 therein, and a magnet gear that rotates in the lower base plate 51 by receiving a rotational driving force from the impeller 20 through the magnet coupling M. 53, a gear train 55 for transmitting the rotation of the magnet gear 53 to the instruction mechanism unit 510 (partially omitted in FIG. 8B), and an upper opening of the lower base plate 51 to close the display window of the instruction mechanism unit 510 And a lens cap 58 that is welded to the lower base plate 51 and seals the indicating mechanism 510.

  The indication unit 50 inserted into the register box 30 has a protrusion 51f provided so as to protrude from the lower surface of the lower base plate 51 with respect to a rib 34 (see FIG. 1) erected on the inner surface of the peripheral wall of the register box 30. By overlapping so as to face each other in the rotation direction, the register box 30 can be rotated within a range (approximately 360 degrees) that does not contact the rib 34.

  With the instruction unit 50 being rotatably inserted into the register box 30 as described above, the cover 60 having the engaging claws 63 (see FIG. 9B) formed on the inner surface of the peripheral wall is disposed on the outer surface side of the upper case 40. The cover 60 is rotatably attached to the upper case 40 by fitting the formed engaging convex portion 42 (see FIG. 7) with a snap fit.

  A flange 65 is formed on the peripheral wall portion of the cover 60 so as to extend inward, and comes into contact with the upper surface of the flange 58a of the lens cap 58 welded to the lower base plate 51 of the indicating unit 50 by the inner surface 65a of the flange 65. Thus, the instruction unit 50 mounted on the register box 30 is pressed against the upper case 40 (see FIG. 10).

Further, a concave portion (not shown) is provided on the inner surface 65a of the flange portion 65, and is fitted to a protrusion 59 (see FIG. 8A) provided on the upper surface of the flange portion 58a of the lens cap 58, thereby indicating the instruction unit. 50 is mounted so as not to be relatively rotatable.
Thereby, the indication unit 50 is integrated with the cover 60 by rotating the cover 60 with respect to the upper case 40 with the convex portion 64 (see FIG. 9A) provided on the outer peripheral surface of the cover 60 as a handle. It is possible to improve visibility by changing the direction to the direction in which the indication unit 50 is easy to see during meter reading.

(2.5) Adjustment process With respect to the water meter 1 assembled through the removal process S1, the cleaning process S2, the sealing process S3, and the mounting process S4, in the adjustment process S5, the instrumental difference with respect to the flow rate is a predetermined allowable range. The position of the resistance plate 32 (see FIG. 1) provided on the bottom surface of the register box 30 is adjusted while passing through the water meter 1 so as to be within the water meter 1.

  In the present embodiment, among the components that cause the instrumental difference, the resistance rib 31 of the register box 30 has a height H and an angle Θ of the register box 30 of the water meter 1A in which the lower case 10 is used. Since it is formed so as to be compatible with the height and angle of the resistance rib, it is possible to reduce the development man-hours of the water meter to be reproduced.

  The water meter 1 according to the reproduction method according to the present embodiment reuses only the lower case 10 of the water meter 1A in which the instruction unit 50A is fixed in the register box 30A in a non-rotatable manner in the upper case 40A. The instruction unit 50 is attached to the register box 30 in a state where the register box 30 is pressed and fixed to the lower case 10 by screwing the female screw part 41 of the case 40 into the male screw part 16 formed on the outer peripheral surface of the opening of the lower case 10. By attaching, the instruction unit 50 is rotatably held in the register box 30.

  The instruction unit 50 rotates integrally with the rotation operation of the cover 60 in a state in which the instruction unit 50 is pressed against the upper case 40 by the cover 60 that is rotatably fitted to the upper case 40. Thereby, the indication unit 50 which cannot be rotated can be rotated, and the indication unit 50 can be changed to a direction in which the indication unit 50 can be easily seen at the time of meter reading, thereby improving the visibility.

As mentioned above, although the lower case 10 explained in full detail about the single box type water meter which serves as the flow volume measurement part R as embodiment which concerns on this invention, this invention is not limited to the said embodiment, Claim Various modifications can be made within the scope of the gist of the present invention described in the above.
For example, the water meter reproduction method according to the present embodiment removes the lower case 10B from the used double box water meter 1B even in the double box water meter 1B having the inner case 18 shown in FIG. It can be applied when reusing.

DESCRIPTION OF SYMBOLS 1, 1A, 1B ... Water meter 10, 10B ... Lower case 11 ... Inlet 12 ... Inlet 13 ... Inner bottom 14 ... Pivot shaft 16 ... Male screw part 20 ... Impeller 30, 30A ... Register box 31, 31A ... Resistance rib 32 ... Resistance plate 40, 40A ... Upper case 41 ... Female screw part 50, 50A ... Instruction unit 60 ... Cover 62 ... Lid R ... Flow rate measuring part G1 ... Gasket

Claims (7)

A water meter reproduction method comprising a lower case with a built-in flow rate measuring unit and opened upward, and a register box fitted into the lower case so as to close the opening of the lower case,
A cleaning step of cleaning the lower case;
A sealing step for watertightly sealing the flow rate measurement unit in a state where the register box is fitted in the lower case;
A mounting step of mounting a cover for holding the instruction unit in the register box in a state in which the instruction unit for displaying the integrated flow rate measured by the flow rate measurement unit is rotatably accommodated in the register box;
A method for regenerating a water meter. Before the cleaning step, comprising a removal step of removing the lower case from the used water meter,
The method of regenerating a water meter according to claim 1. In the sealing step, a new upper case having a female screw portion is screwed into a male screw portion formed on the outer peripheral surface of the opening of the lower case, so that the register box is lowered by the upper case. Press against the upper end surface of the opening of the case to seal the flow rate measurement unit in a watertight manner,
The method of regenerating a water meter according to claim 1. The register box is compatible with the register box fitted in the lower case removed from the used water meter.
The method for remanufacturing a water meter according to any one of claims 1 to 3. A pair of resistance ribs having a triangular cross section provided along the diametrical direction outside the circular bottom surface of the register box, the height and angle of the resistor ribs were fitted into the lower case removed from the water meter used. It is formed to be compatible with the height and angle of the resistance rib provided outside the circular bottom surface of the register box.
The method of regenerating a water meter according to claim 4. In the mounting step, the cover is rotatably mounted together with the instruction unit by snap-fitting the cover to the outer surface of the upper case.
The method of regenerating a water meter according to claim 1. Reproduced by the water meter reproduction method according to any one of claims 1 to 6, using the lower case removed from the used water meter.
A water meter characterized by that.

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