KR102557471B1 - Ultrasonic water meter for backflow prevention - Google Patents

Abstract

The present invention relates to an ultrasonic water meter for backflow prevention, which may prevent pollution of service water or a measurement error by forming a backflow prevention valve on a fluid flow pipe of a flow velocity detection unit and then preventing backflowing. The ultrasonic water meter for backflow prevention comprises: a flow velocity detection unit which includes a fluid flow pipe allowing service water to be introduced or emitted, a pair of ultrasonic sensor modules installed at a certain interval at an upper part of the fluid flow pipe, and a backflow prevention unit forming at one side of the upper part of the fluid flow pipe and thus preventing backflowing of fluids; and a flow rate measurement unit which is connected to an upper part of the flow velocity detection unit to calculate a flow rate by using flow velocity data acquired by the flow velocity detection unit and then display the flow rate. The backflow prevention unit is installed to be inclined upward at a certain angle toward an emission port of the fluid flow pipe, and allows a backflow prevention valve to be mounted thereon.

Description

Ultrasonic water meter for backflow prevention {ULTRASONIC WATER METER FOR BACKFLOW PREVENTION}

The present invention relates to an ultrasonic water meter, and more particularly, to an ultrasonic water meter for preventing backflow, which prevents backflow by configuring a backflow prevention valve on a fluid flow pipe of a flow rate sensor to prevent contamination of constant water or measurement errors. it's about

As is well known, an ultrasonic water meter is a measuring device that electronically measures the total amount of water flowing through a water pipe, that is, tap water usage, by using an ultrasonic signal.

In general, ultrasonic water meters are configured in a form in which a flow rate sensor and a flow measurement unit are combined.

A pair of ultrasonic sensor modules are installed in the fluid flow pipe of the flow rate sensor at regular intervals, and the flow rate measurer outputs and receives ultrasonic signals through the pair of ultrasonic sensor modules to measure the ultrasonic signal transmitted in the flow direction of the fluid. The speed of the fluid is calculated by comparing the difference between the transmission speed and the transmission signal of the ultrasonic signal transmitted in the opposite direction of the fluid flow, and the flow rate (use amount) is finally calculated using the calculated fluid velocity and the cross-sectional area of the fluid flow pipe through which the fluid flows. (Measure) and display.

However, when reverse flow occurs in the fluid flow pipe of the flow rate sensing unit configured as described above, there has been a problem that constant is contaminated or an error occurs in flow rate measurement.

Registered Patent Publication No. 10-1888188 (registration date: August 07, 2018) Registered Patent Publication No. 10-1576771 (registration date: December 04, 2015) Registered Patent Publication 10-2212130 (registration date: January 29, 2021) Registered Patent Publication No. 10-2406733 (registration date: June 02, 2022)

The present invention is to solve the above problems, and an object of the present invention is to prevent backflow by constructing a backflow prevention valve on the fluid flow pipe of the flow rate sensor to prevent backflow, thereby preventing contamination of constant water or measurement error. It is about providing a water meter.

The present invention for achieving the above object is a fluid flow pipe through which tap water flows in and out, a pair of ultrasonic sensor modules installed at an upper part of the fluid flow pipe while maintaining a predetermined interval, and one upper side of the fluid flow pipe A flow rate detection unit including a backflow prevention unit formed on the backflow of the fluid; and a flow rate measuring unit connected to an upper portion of the flow rate sensing unit to calculate and display a flow rate using the flow rate data obtained from the flow rate sensing unit, wherein the backflow prevention unit is inclined at a certain angle upward toward the outlet side of the fluid flow pipe. It is installed so as to be supported, and a non-return valve is installed therein.

In addition, according to the present invention, the check valve is provided with a cylindrical body having a hollow part, a packing part attached to the front end of the body, a plurality of inlet holes formed between the front end part and the body, and installed inside the hollow part. It is characterized in that it is composed of a cross-shaped bulkhead portion so that the water introduced through the inlet hole is uniformly distributed.

In addition, according to the present invention, the flow rate sensor is mounted inside the fluid flow pipe and further includes an internal mounting pipe in which a pair of ultrasonic reflectors are installed at a position corresponding to the pair of ultrasonic sensor modules, and the ultrasonic reflector is flat. It consists of an elliptical body, a connecting portion formed on both sides of the elliptical body, and a mounting portion formed on the other side of the connecting portion and inserted into the first and second mounting grooves of the inner mounting pipe,

The connection portion is formed to have a relatively smaller area than the elliptical body, and curved portions are formed at upper and lower portions of the elliptical body.

In addition, according to the present invention, the flow rate sensing unit is characterized in that the support plate is further formed to fix the pair of ultrasonic sensor modules on the upper portion of the fluid flow pipe and coupled to the flow rate measuring unit.

In addition, according to the present invention, the fluid flow pipe has an inlet and an outlet through which tap water flows in and out at both ends, and a pair of ultrasonic sensor modules, a first ultrasonic sensor module and a second ultrasonic sensor module, are mounted on the upper part. The parts are formed at regular intervals, and on one side of the upper part, an element mounting part is formed to which a leak detection vibration transmission element is mounted, and a bolt mounting part in which a central fixing bolt is inserted to align the center of the internal mounting pipe mounted inside is formed in the upper center. characterized by the formation of

As described above, the present invention provides an effect of preventing contamination of constant water or measurement errors by configuring a backflow prevention valve on the fluid flow pipe of the flow rate sensing unit to prevent backflow.

1 is an exploded perspective view of a flow rate sensing unit and a flow rate measuring unit according to the present invention;
2 is a perspective view according to the present invention;
3 is an exploded perspective view of a flow rate sensor according to the present invention;
4 is (a) a perspective view and (b) a front view of a check valve according to the present invention;
5 is a side view of the flow rate sensor according to the present invention;
6 and 7 are side cross-sectional views of the flow rate sensor showing the operating state of the non-return valve according to the present invention;
8 is an exploded perspective view of an internal mounting pipe according to the present invention;
9 is an ultrasonic reflector according to the present invention, (a) a perspective view, (b) a front installation configuration diagram, and (C) a side installation configuration diagram.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

First, in adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible, even if they are displayed on different drawings. And, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

1 is an exploded perspective view of a flow rate sensor and a flow rate measurement unit according to the present invention, FIG. 2 is a perspective view according to the present invention, and FIG. 3 is an exploded perspective view of the flow rate sensor according to the present invention.

As shown, the ultrasonic water meter for preventing backflow of the present invention,

The flow rate sensor 100 for detecting the flow rate of the fluid flowing in the fluid flow pipe 110 using ultrasonic waves, and the flow rate data obtained from the flow rate sensor 100 connected to the upper part of the flow rate sensor 100 It includes a flow rate measuring unit 200 that calculates and displays the flow rate using the flow rate, but is configured such that a backflow prevention unit 115 for preventing the backflow of fluid is formed on one upper side of the fluid flow pipe 110.

The flow rate sensor 110 includes a fluid flow pipe 110 through which tap water flows in and out, a pair of ultrasonic sensor modules installed at a predetermined interval on top of the fluid flow pipe 110, and the fluid flow An internal mounting pipe 140 mounted on the inside of the pipe 110 and having a pair of ultrasonic reflectors installed at positions corresponding to the pair of ultrasonic sensor modules, and the pair on top of the fluid flow pipe 110. A support plate 150 fixed to the ultrasonic sensor module and coupled to the flow measurement unit 200, and a backflow prevention unit 115 installed to be inclined at a certain angle upward toward the outlet 112 of the fluid flow pipe 110 It includes a check valve 160 mounted inside the.

The fluid flow pipe 110 has an inlet 111 and an outlet 112 through which tap water flows in and out at both ends, and a pair of ultrasonic sensor modules, the first ultrasonic sensor module 120 and the second ultrasonic sensor module, are formed at the top. The sensor mounting parts 113 and 114 to which the sensor module 130 is mounted are formed at regular intervals, and an element mounting part 116 to which the leak detection vibration transmission element 117 is mounted is formed on one side of the upper part, and the upper center A bolt mounting portion 118 into which a central fixing bolt 119 is inserted is formed to align the center of the inner mounting pipe 140 mounted therein.

The first ultrasonic sensor module 120 and the second ultrasonic sensor module 130 are modules capable of outputting and receiving ultrasonic waves, and are inserted and mounted into the mounting holes 113a and 114a of the sensor mounting parts 113 and 114. And, through the ultrasonic reflector 148 located inside the fluid flow pipe 110, the ultrasonic wave is output or received to the other side to detect the velocity of the fluid in the forward direction (fluid flow direction) or reverse direction.

In addition, the first ultrasonic sensor module 120 and the second ultrasonic sensor module 130 transmit the velocity data of the detected fluid to the substrate 230 of the flow rate measurement unit 200 .

The leak detection vibration transmitting element 117 senses the vibration of the fluid flow pipe 110 and transmits it to the diaphragm 222 as a leak detection sensor.

The leak detection can determine whether or not water leaks by detecting the vibration of the fluid flow pipe 110 through which the fluid flows.

In addition, a strainer 110b for filtering out foreign substances is mounted inside the inlet 111 of the fluid flow pipe 110, and a plurality of horizontal holding parts 110a are formed on the bottom so that the flow rate sensor 200 is stable It allows you to stand up.

In addition, fastening parts 111a and 112a are formed on the inlet 111 and outlet 112 sides.

The fluid flow pipe 110 is preferably made of brass, but is not limited thereto.

As shown in FIG. 8, the internal mounting pipe 140 includes a tubular body 141 formed by combining a pair of first semicircular portions 141a and a second semicircular portion 141b, and a constant upper portion of the tubular body 141. The first opening 142 and the second opening 143 formed at intervals, and the ultrasonic reflector 148 on both sides of the inside of the body 141 where the first opening 142 and the second opening 143 are located. The first mounting groove 144 and the second mounting groove 145 formed so that both ends are inserted and mounted, and the O-ring groove 146 formed on the outer circumferential surface of the tube body 141 to which the O-ring 149 is mounted, A pair of central fixing grooves 147 formed in the upper center of the body 141 and into which the central fixing bolts 119 are inserted, and mounted in the first mounting grooves 144 and the second mounting grooves 145 An ultrasonic reflector 148 is included.

The internal mounting pipe 140 is mounted inside the fluid flow pipe 110, and at this time, it is mounted in an accurate position by a central fixing bolt 119 inserted into the central fixing groove 147.

The first opening 142 and the second opening 143 are formed to be located below the first ultrasonic sensor module 120 and the second ultrasonic sensor module 130, and the first mounting groove 144 and The second mounting groove 145 is formed at an angle of 45 degrees so that the ultrasonic reflector 148 mounted therein is inclined at 45 degrees, so that the ultrasonic waves output from the first ultrasonic sensor module 120 and the second ultrasonic sensor module 130 are formed. is configured to be able to communicate ultrasonic signals with each other by being turned 90 degrees through the ultrasonic reflector 148.

As shown in FIG. It consists of a mounting portion 148c inserted into the first and second mounting grooves 144 and 145 of the inner mounting pipe 140,

The connection portion 148b is formed to have a relatively smaller area than the elliptical body 148a, and curved portions 148d are formed at upper and lower portions of the elliptical body 148a.

When the ultrasonic reflector 148 configured as described above is mounted on the internal mounting pipe 140, a first space S1 formed between the inner circumferential surface of the internal mounting pipe 140 and the connecting portion 148b is formed as shown in FIG. 9 (b). At the same time, a second space S2 is further formed by the upper and lower curved portions 148d of the elliptical body 148a to provide an effect of smoothing the flow of fluid.

In addition, when viewed from the side as shown in (c) of FIG. 9, it can be seen that the structure allows fluid to smoothly flow into the upper and lower spaces S3 of the ultrasound plate reflector 148.

Such a structure and effect makes it possible to keep the water pressure and the amount of discharged water constant by facilitating the flow of fluid.

In addition, the ultrasonic reflector 148 of the present invention is made of SUS material and can be manufactured with only a single press process through a mold, providing an effect of reducing product cost with excellent productivity.

The O-ring 149 seals the fluid between the fluid flow pipe 110 and the inner mounting pipe 140 so that the fluid flows only through the inner mounting pipe 140.

The support plate 150 is a component that fixes the pair of ultrasonic sensor modules to the upper portion of the fluid flow pipe 110 and is coupled to the flow rate measurement unit 200, and the first ultrasonic sensor module 120 and The sensor mounting portion ( 113) includes a first through hole 153 fastened to (114) and a first fastening part 154 fastened to the bottom surface of the flow rate measurement unit 200.

The backflow prevention valve 160 is a characteristic component of the present invention, and is installed in the inner mounting hole 115a of the backflow prevention part 115 installed to be inclined at a certain angle upward on the outlet 112 side of the fluid flow pipe 110. It is mounted and configured to be sealed with a stopper (115b).

The backflow prevention valve 160 mounted on the mounting hole 115a of the backflow prevention part 115 is a first hole G1 formed in the flow path conversion wall 110c inside the fluid flow pipe 110 as shown in FIG. It is configured to open and close by water pressure.

As shown in FIG. 4, the check valve 160 includes a cylindrical body 161 having a hollow part 165, a packing part 163 attached to the front end 164 of the body 161, and the front end. A plurality of inlet holes 162 formed between the 164 and the body 161, and installed inside the hollow part 165 so that the water flowing through the inlet hole 162 is uniformly distributed. It is composed of the partition wall part 166.

The operation of the backflow prevention unit 115 and the backflow prevention valve 160 configured as described above will be described.

First, water introduced into the inlet 111 of the fluid flow pipe 110 passes through the internally mounted pipe 140 as shown in FIG. The first hole G1 formed in the wall 110c is opened and discharged to the outside through the outlet 112 through the second hole G2.

Here, when water is normally supplied, the packing part 163 that was blocking the first hole G1 (in the initial state) is pressed, and the cylindrical body 161 is opened while retracting along the mounting hole 115a.

Accordingly, tap water normally flows through the inlet 111 and the outlet 112 .

When reverse flow occurs after such normal water supply, in this case, water flows backward from the outlet 112, and the reverse flow water flows through the second hole G2 through the inlet hole of the check valve 160 ( 162) and the hollow part 165, the body 161 and the front end 164 are pressed downward so that the packing part 163 closes the second hole G1, thereby blocking reverse flow. will be.

On the other hand, the flow rate measuring unit 200 is coupled to the upper end of the flow rate sensing unit 100 as shown in FIG. 1, and a battery and a board unit are mounted therein,

A coupling groove portion 201 into which the support plate portion 150 of the flow rate sensor 100 is inserted and coupled is formed on the bottom portion 202, and the first ultrasonic sensor module 120 and the second ultrasonic wave sensor module 120 are formed in the coupling groove portion 201. A line inlet hole 2111 into which the lines 121 and 131 of the sensor module 130 are introduced is formed, and an element insertion hole 203 into which the leak detection vibration transmission element 117 is inserted is formed on one side. do.

The flow rate measurement unit 200 calculates and calculates the flow rate using forward and reverse fluid velocity data transmitted from the first ultrasonic sensor module 120 and the second ultrasonic sensor module 130 of the flow velocity detection unit 100. Displays the flow rate data as numerical values on the LCD that can be checked from the outside.

In addition, the flow measurement unit 200 is configured to transmit flow data to an external control center through a separate antenna and wireless communication means.

In the above, limited embodiments of the present invention have been described, but those skilled in the art should note that the present invention is not limited thereto and various embodiments are expected.

100: flow rate sensor 110: fluid flow pipe
120: first ultrasonic sensor module 130: second ultrasonic sensor module
140: internal mounting pipe 148: ultrasonic reflector
150: support plate 160: backflow prevention valve
161: body 162: inlet hole
163: packing part 164: tip part
165: hollow part 166: cross bulkhead part
200: flow measurement unit

Claims (5)

A fluid flow pipe through which tap water flows in and out, a pair of ultrasonic sensor modules installed at a predetermined interval on the top of the fluid flow pipe, and a reverse flow formed on one side of the upper portion of the fluid flow pipe to prevent reverse flow of the fluid. Flow rate detection unit including a prevention unit; and
Including a flow rate measurement unit connected to the upper portion of the flow rate sensor to calculate and display the flow rate using the flow rate data obtained from the flow rate sensor,
The backflow prevention unit is installed to be inclined at a certain angle upward toward the outlet side of the fluid flow pipe, and a backflow prevention valve is installed therein,
The fluid flow pipe has an inlet and an outlet through which tap water flows in and out at both ends, and a pair of ultrasonic sensor modules, a first ultrasonic sensor module and a second ultrasonic sensor module, are mounted on the top of the fluid flow pipe. It is formed, and on one side of the upper part is formed an element mounting portion to which a leak detection vibration transmission element is mounted, and a bolt mounting portion into which a central fixing bolt is inserted to align the center of the inner mounting pipe mounted therein is formed in the center of the upper part. Ultrasonic water meter for backflow prevention. The method of claim 1,
The backflow prevention valve includes a cylindrical body having a hollow part, a packing part attached to the front end of the body, a plurality of inlet holes formed between the front end part and the body, and installed inside the hollow part to flow in through the inlet hole. An ultrasonic water meter for preventing backflow, characterized in that it is composed of a cross-shaped partition so that water is uniformly distributed. The method of claim 1,
The flow rate sensor is mounted inside the fluid flow pipe and further includes an internal mounting pipe in which a pair of ultrasonic reflectors are installed at a position corresponding to the pair of ultrasonic sensor modules,
The ultrasonic reflector is composed of a plane, and consists of an elliptical body, a connecting portion formed on both sides of the elliptical body, and a mounting portion formed on the other side of the connecting portion and inserted into the first and second mounting grooves of the inner mounting pipe. but
The connection part is formed to have a relatively smaller area than the elliptical body, and curved portions are formed on the upper and lower parts of the elliptical body. The method of claim 1,
The flow rate detection unit fixes the pair of ultrasonic sensor modules on the upper part of the fluid flow pipe and the support plate portion coupled to the flow measurement unit is further formed.

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