KR20210127119A - Electronic water meter made of stainless steel - Google Patents

Abstract

Disclosed is an electronic water meter made of stainless steel. Specifically, the electronic water meter made of stainless steel comprises: a housing part including an inlet port formed on one side and an outlet port formed on the other side; a casing part mounted in the housing part and including a plurality of through-holes formed in the outer circumferential surface thereof, wherein water flows through the through-holes; a flow rate measurement unit including an impeller rotatably installed in the casing part and to be rotated by the flow of water passing therethrough and a rotary shaft axially coupled to the center of the impeller and including a magnet attached to an upper end thereof; a support member covering the housing part and including a cap-shaped protective cap formed at the center thereof to protrude upward to accommodate the magnet; a sensor part positioned adjacent to an upper side of the protective cap and configured to detect the magnetic force of the rotating magnet; and a digital control part coupled to cover the support member and configured to receive signals from the sensor part to count and display a flow rate. The housing part and the support member are all made of stainless steel. A shielding cap made of a non-magnetic material formed in a circular cup shape is inserted into the protective cap to block the magnetic force remaining in the cover. In accordance with the present invention, the electronic water meter made of stainless steel has the effect of minimizing errors in measurements of a flow rate.

Description

Electronic water meter made of stainless steel

The present invention relates to an electronic water meter, and more particularly, to an electronic water meter made entirely of stainless steel material.

In the past, water meters used a mechanical type that measured the flow of water mechanically and converted it into a meter scale. In such a mechanical meter, it is difficult to check the amount of meter reading in real time, as well as increase the cost for meter reading, because individual meter reading by a meter reading person is required.

In order to supplement this mechanical type, an electronic water meter has appeared and is widely used.

However, in the case of an electronic water meter, since it is the principle of detecting the rotation amount of the magnet and reading it, it is sensitive to the magnetic force generated from the outside, and an error may occur in the metering. In particular, it is also a problem to induce inaccurate weighing by using a strong magnet from the outside for the purpose of measuring.

To solve these problems, the following techniques have been proposed.

1 is a cross-sectional view showing the structure of a conventional electronic water meter.

Briefly, "a water supply pipe is connected to one side, a discharge pipe is connected to the other side, and a through hole communicating with the inside is formed in the upper center, and a fastening part is formed on the outer periphery of the meter body 100 and the meter; It is guided and placed in the through hole of the body, and a plurality of inlet holes through which water supply passes to the inside are provided on the outer periphery, and an impeller 210 and a magnet 220 that rotate by a one-way flow flow inside the flow meter 200 are provided. and a digital display unit installed on the flow meter 200 and receiving a signal due to the influence of a magnetic field of a rotating magnet to counter the flow rate, and a display unit 440 displaying the counter value and a communication connection port on the upper portion An electronic water meter comprising: a measuring device 400; The stepped portion 310 is formed so as to be seated on the support jaw 102 formed on the inner circumferential surface of the meter body, the airtight ring 350 is fitted around the lower outer periphery of the stepped portion, and the magnet is accommodated in the upper center of the upper portion. A support member 300 with a protrusion 320 protruding from the support member 300; It is configured to include a protrusion 415 having a fitting groove 412 into which the 500 is fitted, and the shielding ring has an entry hole in the center so that a sensor 425 for countering the pulse signal generated from the magnet enters. Consists of an upper surface portion 510 having 515 formed thereon, and a peripheral portion 520 extending below the edge of the upper surface portion 510 and having a lower end fitted into the fitting groove, and the protrusion is the lower portion of the digital measuring instrument body. It protrudes in a circular cross-sectional structure having a larger diameter than the accommodating protrusion in the center, and the height of the protrusion is equal to the height of the accommodating protrusion from the upper surface of the support member so that the protrusion can wrap the accommodating protrusion. It is formed to have a corresponding height, and the digital measuring body 410 is an electronic water meter, characterized in that a concave receiving groove 417 is formed to accommodate the sensor 425 on the upper side of the bottom surface." has been proposed.

It is possible to shield the permanent magnet and the sensor unit from external magnetic force by using the shielding ring in the prior art described above.

In addition, most water meters are made of brass material without magnetism, and if used for a long time, rust occurs, shortening the lifespan, and harmful substances may be generated for hygiene.

So, recently, the water meter is manufactured from stainless steel, which is hygienic and semi-permanent because it does not rust. Because stainless steel has no magnetism and is excellent in strength, durability, pressure resistance, lifespan and recycling, all existing water meters are being replaced with stainless steel meters.

However, in the case of stainless steel, there is a problem in that magnetism is generated during processing.

Although heat treatment is performed to eliminate this, fine magnetism may remain, which may cause an error in actual measurement. And the removed magnetism may reappear when used for a long time.

In particular, when the flow rate is small, the small magnetic force may affect the permanent magnet or the sensor, so if the meter is made of stainless steel, this problem must be solved.

Since the conventional shielding ring is a structure for shielding magnetic force generated from the outside, it is not suitable to shield the magnetic force generated by the stainless steel meter itself, so a new shielding structure is needed.

Republic of Korea Patent No. 10-1146716 (2012.5.9.) "Stainless steel material single-stage water meter and its manufacturing method" Republic of Korea Patent Registration 10-2078346 (2020.2.11.) "Electronic water meter" Republic of Korea Patent No. 10-2242456 (April 14, 2021) "Electric water meter for freeze protection"

Accordingly, the present invention has been developed to solve the above-mentioned problems in the prior art, and an object of the present invention is to provide a water meter made of stainless steel, but a stainless steel material that can accurately measure the flow rate by blocking the fine magnetic force generated in the stainless steel to provide an electronic water meter of

The electronic water meter made of stainless steel according to the present invention for achieving the above object includes a housing part having an inlet on one side and an outlet on the other side, and is seated inside the housing part and the running water passes through the outer circumferential surface. A casing part having a plurality of through-holes formed therein, an impeller rotatably installed inside the casing part and rotating by the flow of flowing water passing through it, and a rotating shaft axially coupled to the center of the impeller and having a magnet attached to the top A flow rate measuring unit, a support member having a cap-shaped protective cap protruding upward to accommodate the magnet in the center of the housing, and a sensor positioned adjacent to the upper side of the protective cap to detect the magnetic force of the rotating magnet In the electronic water meter comprising a unit and a digital control unit coupled to cover the supporting member and receiving a signal from the sensor unit to count and display the flow rate, the housing unit and the supporting member are all made of a stainless steel material, , a shielding cap made of a non-magnetic material forming a circular cup shape is inserted inside the protective cap to block the magnetic force remaining in the cover.

Here, the upper portion of the protective cap is opened to form a cap hole, and the upper end of the shielding cap is exposed through the cap hole and blocked.

In this case, a stepped step may be formed on the outer circumferential surface of the shielding cap, and a locking step having a shape corresponding to the step may be formed on the inner circumferential surface of the protective cap.

In addition, the step and the locking jaw are inclined, and a sealing member may be inserted between the shielding cap and the protective cap.

On the other hand, a pin socket into which a rotation pin formed on the upper end of the rotation shaft can be inserted protrudes downward from the inner upper surface of the shielding cap.

According to another embodiment of the present invention, an inlet is formed on one side and an outlet is formed on the other side, and a housing part is seated inside the housing part and a casing part having a plurality of through holes through which running water passes to the inside is formed on the outer circumferential surface; A flow measurement unit comprising an impeller which is rotatably installed inside the casing and rotates by the flow of flowing water passing through, and a rotating shaft that is axially coupled to the center of the impeller and has a magnet attached to the top, and covers the housing and at the center A support member having a cap-shaped protective cap protruding upward to accommodate the magnet, a sensor unit positioned adjacent to an upper side of the protective cap and sensing the magnetic force of the rotating magnet, and coupled to cover the support member, In the electronic water meter including a digital control unit for counting and displaying the flow rate by receiving a signal from the sensor unit, the housing unit and the supporting member are all made of stainless steel, and the upper outer circumferential surface of the protective cap has a cap shape. and a shielding cap made of a non-magnetic material is covered to block the magnetic force remaining in the support member.

Here, the protective cap has a hollow tube shape, a male thread is formed on an outer circumferential surface, and a female thread is formed on an inner circumferential surface of the shielding cap to be fastened to the protective cap.

A flat cover is provided between the upper surface of the protective cap and the shielding cap, a cap hole is formed in the center of the shielding cap, and a stepped portion protruding from the center of the cover may be fitted into the cap hole.

In addition, a sealing member is inserted between the shielding cap and the cover, and a protrusion that can be inserted into the recess formed at the upper end of the rotation shaft may be formed on the lower surface of the cover.

According to the present invention described above, there are the following effects.

First, since it is made of stainless material, durability, pressure resistance, strength, recyclability, etc. are high compared to conventional brass materials, and there are various advantages that are not harmful because rust is not used.

Second, since a non-magnetic shielding cap is inserted inside the protective cap to block the magnetic force remaining in the stainless steel from reaching the magnet and the sensor, it is possible to minimize the flow rate measurement error.

Third, a non-magnetic shielding cap is placed on the outside of the protective cap to block the magnetic force remaining in the stainless steel from reaching the magnet and the sensor.

1 is a cross-sectional view showing the structure of a conventional electronic water meter
2 is a cross-sectional view showing an electronic water meter made of stainless steel according to an embodiment of the present invention;
Figure 3 is an exploded perspective view showing the support member of the present invention shown in Figure 2
4 is a cross-sectional view showing an embodiment of the shielding cap and the rotation shaft of the present invention shown in FIG.
5 is a cross-sectional view showing an electronic water meter made of stainless steel according to another embodiment of the present invention;
6 is a cross-sectional view showing the support member of the present invention shown in FIG.

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

For reference, the description with reference to the drawings is for easier understanding of the present invention, and the scope of the present invention is not limited thereto. And, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

2 is a cross-sectional view showing an electronic water meter made of stainless steel according to an embodiment of the present invention.

The present invention may be largely configured to include a housing unit 100 , a casing unit 200 , a flow rate measurement unit 300 , a support member 400 , a sensor unit 500 , and a digital control unit 600 .

First, in the housing part 100, an inlet 110 for inflow of water supply is formed on one side, and an outlet 120 for outflow of water supply is formed on the other side.

And an accommodating space is formed therein to accommodate the casing part 200 and the flow rate measuring part 300 .

In addition, the opening 130 is formed on the upper side of the housing part 100 , and a screw thread is formed along the edge of the opening 130 , so that it can be assembled by fastening it with the digital controller 600 .

Here, the housing part 100 may be made of a stainless steel material. And it can be manufactured by casting.

Next, the casing part 200 is provided inside the housing part 100 .

The casing part 200 is formed in a circular container and is seated on the bottom of the housing part 100 .

A plurality of through-holes 210 are formed in the outer peripheral surface of the casing unit 200 , and the flowing water flowing into the inlet 110 of the housing unit 100 enters the casing unit 200 through the through-holes 210 . It flows in, and is discharged through the other through hole 210 while rotating the impeller 310 installed therein, and then flows out through the outlet 120 .

Here, the casing part 200 may be made of a non-magnetic metal or resin material such as brass, copper, or aluminum. Of course, it may be made of a stainless steel material.

Next, the flow rate measurement unit 300 will be described.

The flow rate measurement unit 300 is installed inside the casing unit 200 to measure the flow rate of running water passing through the casing unit 200 .

The flow rate measuring unit 300 may include an impeller 310 , a rotating shaft 320 , and a magnet 330 .

The impeller 310 is rotatably provided at the center of the bottom of the casing part 200 to have a rotational speed in proportion to the flow rate introduced into the casing part 200 .

The impeller 310 may be rotated by hydraulic pressure because a plurality of blades are formed to rotate smoothly according to the flow rate.

Since the detailed structure of the impeller 310 is known, a detailed description thereof will be omitted.

And the rotation shaft 320 is formed to protrude upward at the center of the impeller 310 .

In addition, the magnet 330 is coupled to the upper end of the rotation shaft 320 . The magnet may be a permanent magnet, and a plurality of magnets may be attached in a radially arranged state.

Therefore, since the magnet 330 rotates together with the rotation of the impeller 310, the number of rotations of the impeller 310 and the number of rotations of the magnet are the same.

Therefore, measuring the rotation speed of the magnet 330 is the same as measuring the rotation speed of the impeller 310 , so that a flow rate proportional to the rotation speed can be measured.

Next, the support member 400, which is a core technical matter of the present invention, will be described with reference to FIG. 3 together. 3 is an exploded perspective view showing the support member of the present invention shown in FIG. 2 , and FIG. 4 is a cross-sectional view showing an embodiment of the shielding cap and the rotating shaft of the present invention shown in FIG. 2 .

The support member 400 covers the opening 130 of the housing part 100 to protect the flow rate measuring unit 300 while connecting the sensor unit 500 and the digital control unit 600 to the flow rate measuring unit 300 . It acts as a barrier separating the

To this end, the support member 400 may have a shape corresponding to the opening of the housing part 100 , and may generally have a circular disk shape.

And a step is formed along the circumference of the support member 400 to be seated on the opening 130 or on the upper end of the casing part 200 .

In addition, a central hole 410 is formed in the center of the support member 400 , and a cap-shaped protective cap 420 is formed to protrude upward in the central hole 410 .

Specifically, the protective cap 420 may have a structure similar to a circular cup shape and provided upside down to be coupled to the central hole 410 . In addition, the rotation shaft 320 is introduced into the protective cap 420 , and the magnet 330 is positioned adjacent to the upper end of the protective cap 420 .

In the present invention, it is preferable that the shielding cap 430 is inserted inside the protective cap 420 .

The shielding cap 430 has a shape corresponding to the protective cap 420 . That is, the shielding cap 430 may also have a substantially circular cup shape, and is made of a non-magnetic material without magnetism. That is, a non-magnetic metal or resin such as aluminum, copper, or brass may be used. However, it is preferably made of a resin material.

The shielding cap 430 may be fitted and inserted into the protective cap 420 to protect the magnet 330 from magnetic force. That is, the shielding cap 430 blocks the magnetic force remaining in the support member 400 made of stainless steel from being transmitted into the protective cap 420 .

In addition, the protective cap 420 may have a structure in which the upper portion is blocked, but may have a structure in which a cap hole 421 is formed and opened as shown.

Accordingly, the cap hole 421 is blocked while the upper end of the shielding cap 430 is exposed through the cap hole 421 .

Because of this structure, even if the sensor part 500 to be described later is located close to the protective cap 420, the influence of magnetic force from the protective cap 420 made of stainless steel can be minimized. This is because the upper portion of the shielding cap 430 comes close to the sensor unit 500 .

Therefore, it is possible to minimize the flow measurement error due to the magnetic force generated in the stainless steel.

On the other hand, the stepped step 433 in the circumferential direction is continuously formed on the outer circumferential surface of the shielding cap 430 . And on the inner circumferential surface of the protective cap 420, the step 433 and the corresponding engaging protrusion 424 are continuously formed in the circumferential direction.

To this end, the upper portion of the shielding cap 430 is formed of an outer diameter portion 431 having a relatively small outer diameter, and the lower portion is formed of an outer diameter portion 432 having a larger outer diameter than the outer diameter portion 431, and the outer diameter portion 431 is formed. ) and the outer diameter portion 432 is formed at the point where the step 433 is formed.

Similarly, the upper portion of the protective cap 420 is formed of a small inner diameter portion 422 having a relatively small inner diameter, and the lower portion is formed of a large inner diameter portion 423 having a larger inner diameter than the small inner diameter portion 422 , and the small inner diameter portion 422 . ) and the large inner diameter portion 423 is formed at a point where the locking jaw 424 is formed.

In this case, the step 433 and the locking step 424 may be formed to be in close contact with each other.

Therefore, even if the water pressure is strong, the step 433 is caught on the locking step 424 and the shielding cap 430 inserted into the protective cap 420 does not come off.

Preferably, an O-ring-shaped sealing member 440 is inserted between the shielding cap 430 and the protective cap 420 . This is to prevent leakage between the protective cap 420 and the shielding cap 430 .

In addition, a pin socket 434 is formed to protrude downward from the inner upper surface of the shielding cap 430 .

The pin socket 434 rotatably supports the upper end so that the rotation shaft 320 can rotate without being oscillated.

The inner diameter of the pin socket 434 is formed to be larger than the outer diameter of the rotation shaft 320 so that the upper end of the rotation shaft 320 is inserted inside.

Accordingly, the magnet 330 attached to the upper end of the rotation shaft 320 is positioned adjacent to the upper end of the shielding cap 430 in a state accommodated in the pin socket 434 .

As another embodiment, as shown in FIG. 4( a ), a rotation pin 321 protruding upward is formed on the upper end of the rotation shaft 320 , and the rotation pin 321 is inserted into the pin socket 434 . can be made into a state of being Of course, the inner diameter of the pin socket 434 may be determined so that the outer diameter of the rotation pin 321 is custom-inserted and rotatable.

As another embodiment, as shown in FIG. 4(b), a concave shaft groove 435 is formed on the inner upper surface of the shielding cap 430, and the upper end of the rotation shaft 320 is the shaft groove 435. can be brought inside.

And it is preferable that a pin groove 436 having an inner diameter smaller than the inner diameter of the shaft groove 435 is formed in the shaft groove 435 . A rotation pin 321 formed on the upper end of the rotation shaft 320 may be inserted into the pin groove 436 to guide rotation.

Next, the sensor unit 500 and the digital control unit 600 will be described.

The sensor unit 500 and the digital control unit 600 are electrically connected to each other. In addition, the digital control unit 600 has a PCB embedded therein, and a display capable of displaying digital values is provided.

The sensor unit 500 is provided in a structure protruding from the lower surface of the digital control unit 600 , and the digital control unit 600 is coupled while covering the support member 400 .

At this time, since the sensor unit 500 is positioned adjacent to the upper end of the shielding cap 430 and comes close to the magnet 330 , it is possible to detect the number of rotations of the magnet 330 .

Accordingly, when the sensor unit 500 detects the rotational speed of the magnet 330 and is input to the PCB, the program calculates the rotational speed as a flow rate, converts AD and displays the flow rate as a digital value.

Hereinafter, another embodiment of the present invention will be described with reference to FIG. 5 .

Another embodiment of the present invention is to be largely configured to include a housing unit 100, a casing unit 200, a flow rate measurement unit 300, a support member 400, a sensor unit 500, and a digital control unit 600. can

Here, since the housing part 100, the casing part 200, the flow rate measuring part 300, the sensor part 500, and the digital control part 600 are substantially the same as those described above, a detailed description is omitted, and the support member (400) will be described only.

The support member 400 may have a circular disk shape, and a step is formed along the circumference to be seated on the opening 130 or seated on the upper end of the casing 200 to cover the opening 130 , It serves as a partition wall separating the sensor unit 500 and the digital control unit 600 from the flow rate measurement unit 300 while protecting the flow rate measurement unit 300 .

In addition, a central hole 410 is formed in the center of the support member 400 , and a circular cap-shaped protective cap 420 is formed in the central hole 410 to protrude upward.

In addition, the rotation shaft 320 is introduced into the protective cap 420 , and the magnet 330 is positioned adjacent to the upper end of the protective cap 420 .

A shielding cap 430 may be covered on the upper outer circumferential surface of the protective cap 420 to block magnetism. That is, the magnetic force remaining in the support member 400 made of stainless steel is blocked from being transmitted to the magnet 330 and the sensor unit 500 .

The shielding cap 430 has a shape corresponding to the protective cap 420, and may be formed in a circular cap or a circular stopper shape, and is made of a non-magnetic material, for example, a non-magnetic metal such as brass, copper, or aluminum. Or it is preferably made of a resin.

In this case, the protective cap 420 may have a hollow tube shape with an open top.

And a male thread 420a is formed on the outer peripheral surface of the protective cap 420, and a female thread 430a is formed on the inner peripheral surface of the shielding cap 430, so that the shielding cap 430 and the protective cap 420 are connected to each other. By fastening the screw, the shielding cap 430 may be covered with the protective cap 420 in a locking manner.

In addition, a cover 450 may be provided between the protective cap 420 and the shielding cap 430 .

The cover 450 may have a flat plate shape, and may have a circular disk shape to cover the upper end of the protective cap 420 .

In this case, the cover 450 may be seated along the seating ridge 425 formed on the upper end of the protective cap 420 . It is preferable that the cover 450 is also made of a non-magnetic material such as a non-magnetic metal material or a resin.

In addition, a cap hole 437 is formed in the center of the shielding cap 430, and a recess 451 protruding from the center of the cover 450 is fitted and coupled to the cap hole 437 to block the cap hole 437. can be exposed through

In addition, it is preferable that a sealing member 440 is inserted between the shielding cap 430 and the cover 450 to prevent the water inside the protective cap 420 from leaking.

In addition, a protrusion 452 or a pin protruding downward is formed on the lower surface of the cover 450 , and the protrusion 452 may be inserted into the recess 322 formed at the upper end of the rotation shaft 320 . Accordingly, the rotation shaft 320 may rotate while being guided by the protrusion 452 .

Although a representative embodiment of the present invention has been described above with reference to the drawings, those skilled in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above content. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the following claims as well as the claims and equivalents.

100: housing 110: inlet
120: outlet 130: opening
200: casing part 210: through hole
300: flow measurement unit 310: impeller
320: rotation shaft 321: rotation pin
322: groove 330: magnet
400: support member 410: central hole
420: protective cap 420a: male thread
421: cap hole 422: small inner diameter
423: large inner diameter 424: locking jaw
425: seating jaw 430: shielding cap
430a: female thread 431: alienated neck
432: Ministry of External Affairs 433: Stepped
434: pin socket 435: shaft groove
436: pin groove 437: cap hole
440: sealing member 450: cover
451: waist 452: protrusion
500: sensor unit
600: digital control unit

Claims (13)

A housing portion having an inlet on one side and an outlet on the other side, a casing portion seated inside the housing portion and having a plurality of through holes through which running water passes through an outer circumferential surface thereof, and rotatably installed inside the casing portion A flow measurement unit comprising an impeller rotating by the flow of flowing water passing through it and a rotating shaft coupled to the center of the impeller and having a magnet attached to the upper end, and a cap type that covers the housing and protrudes upward to accommodate the magnet at the center A support member on which the upper protective cap is formed, a sensor part that is positioned adjacent to the upper side of the protective cap and detects the magnetic force of the rotating magnet, is coupled to cover the support member and receives a signal from the sensor part to receive a flow rate In the electronic water meter including a digital control unit for counting and displaying,
The housing part and the supporting member are all made of a stainless steel material,
An electronic water meter made of stainless steel, characterized in that a non-magnetic shielding cap having a circular cup shape is inserted into the protective cap to block the magnetic force remaining in the support member. The method of claim 1,
An electronic water meter made of stainless steel, characterized in that the upper portion of the protective cap is opened to form a cap hole, and the upper end of the shielding cap is exposed through the cap hole and blocked. 3. The method of claim 2,
An electronic water meter made of stainless steel, characterized in that a stepped step is formed on the outer circumferential surface of the shielding cap, and a locking step corresponding to the step is formed on the inner circumferential surface of the protective cap. 4. The method of claim 3,
The electronic water meter made of stainless steel, characterized in that the step and the locking jaw are inclined. 5. The method of claim 4,
An electronic water meter made of stainless steel, characterized in that a sealing member is inserted between the shielding cap and the protective cap. 6. The method of claim 5,
An electronic water meter made of stainless steel, characterized in that a pin socket into which a rotary pin formed at an upper end of the rotary shaft can be inserted protrudes downward from the inner upper surface of the shielding cap. 6. The method of claim 5,
A shaft groove into which the upper end of the rotation shaft can be introduced is formed on the inner upper surface of the shielding cap, and a pin groove into which the rotation pin formed at the top of the rotation shaft can be inserted is formed in the shaft groove. Electronic water meter. A housing portion having an inlet on one side and an outlet on the other side, a casing portion seated inside the housing portion and having a plurality of through holes through which running water passes through an outer circumferential surface thereof, and rotatably installed inside the casing portion A flow measurement unit comprising an impeller rotating by the flow of flowing water passing through it and a rotating shaft coupled to the center of the impeller and having a magnet attached to the upper end, and a cap type that covers the housing and protrudes upward to accommodate the magnet at the center A support member on which the upper protective cap is formed, a sensor part that is positioned adjacent to the upper side of the protective cap and detects the magnetic force of the rotating magnet, is coupled to cover the support member and receives a signal from the sensor part to receive a flow rate In the electronic water meter including a digital control unit for counting and displaying,
The housing part and the supporting member are all made of a stainless steel material,
An electronic water meter made of stainless steel, characterized in that the upper outer circumferential surface of the protective cap has a cap shape and a non-magnetic shielding cap is covered to block the magnetic force remaining in the support member. 9. The method of claim 8,
The protective cap has a hollow tube shape, and a male thread is formed on the outer circumferential surface,
An electronic water meter made of stainless steel, characterized in that a female thread is formed on the inner circumferential surface of the shielding cap and can be fastened to the protective cap. 10. The method of claim 9,
A flat cover is provided between the upper surface of the protective cap and the shielding cap,
A cap hole is formed in the center of the shielding cap,
An electronic water meter made of stainless steel, characterized in that the stepped portion protruding from the center of the cover is fitted and coupled to the cap hole. 11. The method of claim 10,
The electronic water meter made of stainless steel, characterized in that the cover is made of a non-magnetic material. 12. The method of claim 11,
An electronic water meter made of stainless steel, characterized in that a sealing member is inserted between the shielding cap and the cover. 13. The method of claim 12,
An electronic water meter made of stainless steel, characterized in that the lower surface of the cover has a protrusion that can be inserted into the groove formed at the upper end of the rotation shaft.

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