JP3100683B2 - High-temperature water meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-temperature water meter for measuring the amount of high-temperature water passing therethrough. More specifically, the present invention relates to a high-temperature water meter that rotates an impeller in accordance with the flow rate of high-temperature water and turns on and off a sensor using, for example, a permanent magnet attached to the impeller to measure the flow rate.

[0002]

2. Description of the Related Art This type of high-temperature water meter requires, for example, the following. Keep hot water from leaking out. The high-temperature water flowing through the flow path must be efficiently applied to the impeller. Protecting magnetic sensors from the heat of hot water.

In view of the above, there is a conventional high-temperature water meter of this type having a configuration as shown in FIG.
That is, while the water-blocking member 1 is mounted in the water meter to prevent high-temperature water from leaking, the water-blocking member 1 is used to partition the measuring chamber 2 and efficiently apply the high-temperature water to the blades 3 a of the impeller 3. In addition, the water-blocking member 1 has a hollow cylindrical portion 1a which rises high in the center, supports a bearing 4 with a top plate portion 1b, and the bearing 4 allows the upper end of a rotating shaft 3b of the impeller 3 to rotate freely. Be supported by. Then, a permanent magnet 5 attached to the upper end of the rotating shaft 3b is placed in a case 8 provided on the counting display unit 7 outside the hollow cylindrical portion 1a away from the flow path of the high-temperature water.
And a magnetic sensor 6 is disposed in opposition.

[0004]

However, in the conventional configuration, the residual air in the hollow portion 1a is trapped around the bearing 4. Further, the water is passed through the water meter, the water pressure is applied, the impeller 3 is driven to rotate, and the rotating shaft 3 of the impeller 3 is rotated.
Heated by the frictional heat between the bearing b and the bearing 4, the temperature around the bearing 4 becomes high. For this reason, there have been problems such as abnormal wear of the rotating shaft 3b of the impeller 3 and the bearing 4, and adverse effects on the magnetic sensor 6.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent a sliding portion between a bearing and an impeller from being abnormally worn or a magnetic sensor from being adversely affected by a high temperature around the bearing. It is in.

[0006]

Therefore, according to the present invention, as shown in the following illustrated embodiments, a measuring chamber 1 is provided.
A high-temperature water supply system in which an impeller 14 is supported by bearings 13 and 16 in a rotatable manner, and high-temperature water is applied to the blades 14b of the impeller 14, and the flow rate is measured from the rotation of the impeller 14. In the meter, the partitioning member 30 for partitioning the measuring chamber 12 is disposed so as to form bypass paths A and B that pass through the back side of the metering chamber 12 from around the bearing 16 to the measuring chamber 12, and that high-temperature water is leaked to the outside. It is characterized in that a water-blocking member 15 to be eliminated is arranged outside the partition member 30.

According to a second aspect of the present invention, in the first aspect of the present invention, as shown in the following embodiment, the bearing 16 is supported by the water-blocking member 15, and the bearing 15 and the partition It is characterized in that a gap 32 is provided between the member 30 and a part of the bypass path A.

According to a third aspect of the present invention, in the first aspect of the present invention, the bearing 16 is supported by the partition member 30, and the partition member
The bypass holes B are partially formed by making flow holes 30i and 30j in the hole 0.

[0009]

According to the first aspect of the present invention, the impeller 1
When the rotary member 4 rotates, a part of the high-temperature water flows through the bypass path A and pushes out residual air from around the bearing 16.

According to the second aspect of the present invention, when the impeller 14 is rotated, a part of the high-temperature water flows through the gap 32 between the bearing 16 and the partition member 30 to push out residual air from around the bearing 16.

According to the third aspect of the present invention, when the impeller rotates, a part of the high-temperature water flows through the flow passage of the partition member.
The remaining air is pushed out from around the bearing 16 by flowing through i · 30j.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a high-temperature water meter according to one embodiment of the present invention. Reference numeral 10 in the figure is a lower case. The lower case 10 has a bottomed cylindrical shape that opens upward, projects outwardly from the outer periphery of the lower end on the left side of the figure in a cylindrical shape, and has a high-temperature water inlet 10a provided at the tip, and a filter 11 provided therein. An outlet 10b is provided on the right side and protrudes outward from the outer periphery of the lower end in the same manner. At the upper end of the lower case 10, a step portion 10c is provided on the inner periphery, and a screw portion 10d is provided on the outer periphery. A measuring chamber 12 is provided in the lower case 10, and a bearing 13 protrudes upward from the center of the bottom 12a. An impeller 14 is housed in the measuring chamber 12. The impeller 14 is provided with a blade 14b around the lower end of a rotating shaft 14a, and the lower end of the rotating shaft 14a is
It is supported by 3. The rotating shaft 14b of the impeller 14 is supported at its upper end by a bearing 16 provided on a water-blocking member 15, and
A permanent magnet 17 is provided integrally on the outer periphery of the upper end. The water-blocking member 15 has a flat lid shape, and a packing 18 is provided between the upper peripheral edge 15a of the outer periphery and the upper end of the lower case 10,
The lower peripheral edge 15b is attached to the inner periphery of the upper end of the lower case 10. The ring-shaped upper case 20 is screwed to the threaded portion 10d of the lower case 10 so as to cover the upper peripheral edge 15a of the water-blocking member 15. On the upper case 20, a counting display unit 22 having a plurality of legs 21 is erected and fixed by the legs 21. A magnetic sensor case 24 is disposed below the center of the counting display unit 22 with a gap 23 between the counter display unit 22 and the water shielding member 15. A magnetic sensor 25 is housed in the magnetic sensor case 24 so as to face the permanent magnet 17. The magnetic sensor 25 and the counting display unit 22 are appropriately connected.

In the lower case 10, a partition member 30 is housed to partition the measuring chamber 12. The partition member 30 raises the outer cylindrical portion 30b from the outer periphery of the bottom portion 30a, and as shown in FIG.
And the flange 30c is attached to the lower case 10
And is supported between the step 10c and the lower peripheral edge 15b of the water-blocking member 15. A center hole 30d is provided in the bottom 30a of the partition member 30, and an inner cylindrical portion 30e is provided standing up from the periphery thereof around the bearing 16. A gap 32 is provided between the upper end of the inner cylindrical portion 30e and the bearing 16. On the other hand, a gap 33 is provided between the outer periphery of the outer cylinder portion 30b and the inner periphery of the lower case 10, and a plurality of cutout holes 30f communicating the inside and the outside are provided on the inner periphery of the upper end of the outer cylinder portion 30b. . The gap 33, the notch hole 30f and the gap 32
Thus, a bypass path A is formed through the rear side of the partition member 30 and from around the bearing to the measuring chamber 12. Under the bottom 30a of the partition member 30, an adjuster 35 for adjusting the instrumental difference is fixed and the blade 14b
And between them.

By the way, usually, after assembling a water meter for high-temperature water, air remains inside the meter. When high-temperature water flows from the inlet 10a to the outlet 10b through the measuring chamber 12, the impeller 14 rotates and the pressure in the measuring chamber 12 increases. Then, a portion of the high-temperature water flows into the bypass passage A, passes through the gap 33, and passes through the cutout hole 30f through the partition member 3.
Flows to the back of 0. Then, the air flows in the bypass path A in the direction of the arrow, passes through the gap 32, and sends out residual air from around the bearing 16 to the outlet 10b.

In the illustrated embodiment, the bearing 16 is supported by the water blocking member 15. However, as shown in FIG. 3, the bearing 16 may be supported by the partition member 30. That is, the partition member 30 is formed by integrally forming a top plate 30g at the upper end of the inner cylindrical portion 30e, and providing a convex portion 30h downward at the center of the top plate 30g.
I support. The top plate portion 30g is provided with a flow hole 30i for residual air or high-temperature water as shown in FIG. Further, a circulation hole 30j for residual air or high-temperature water is provided at the upper end of the inner cylindrical portion 30e. The gap 33, the cut-out hole 30f, the flow holes 30i and 30j and the like form a bypass passage B passing through the back side of the partition member 30 and from around the bearing 16 to the measuring chamber 12.

When the impeller 14 is rotated to increase the pressure in the measuring chamber 12, high-temperature water flows into the bypass passage B, passes through the gap 33, and moves from the notch hole 30 f to the back side of the partition member 30. Flows. Then, the gas flows through the bypass passage B in the direction of the arrow and passes through the flow holes 30i and 30j.
The residual air is sent to the outlet 10b from around.

[0018]

As described above, according to the present invention, when the impeller is rotated, a portion of the high-temperature water flows through the bypass path and pushes out residual air from around the bearing. The temperature around the bearing does not become high. Therefore, it is possible to prevent the rotating shaft of the impeller and the bearing from being abnormally worn, and to prevent the magnetic sensor and the like from being adversely affected.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a high-temperature water meter according to an embodiment of the present invention.

FIG. 2 is an external perspective view of the partition member.

FIG. 3 is a longitudinal sectional view of a high-temperature water meter according to another embodiment of the present invention.

FIG. 4 is an external perspective view of the partition member.

FIG. 5 is a longitudinal sectional view of a conventional high-temperature water meter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Weighing chamber 13/16 Bearing 14 Impeller 14b Blade 15 Water-blocking member 30 Partition member 30i / 30j Flow hole 32 Gap AB bypass path

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 62-162627 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G01F 1/075 G01F 1/00 G01F 15 / 08 G01F 15/14

Claims (3)

(57) [Claims] A high-temperature water meter for supporting an impeller in a measuring chamber with a bearing and rotatably storing the impeller, applying high-temperature water to the impeller blades, and measuring the flow rate from the rotation of the impeller. A partitioning member for partitioning the measuring chamber is arranged and formed with a bypass passing from the periphery of the bearing to the measuring chamber through the back side thereof, and a water shielding member for preventing high-temperature water from leaking to the outside. A high-temperature water meter arranged outside the partition member. 2. The high-temperature high-temperature apparatus according to claim 1, wherein the bearing is supported by the water-blocking member, and a gap is provided between the bearing and the partition member to form a part of the bypass path. Water meter for water. 3. The high-temperature water meter according to claim 1, wherein the bearing is supported by the partition member, and a flow hole is formed in the partition member to form a part of the bypass passage.