KR20200115121A - Check valve for blocking minute flow for water meter - Google Patents

Abstract

The present invention relates to a micro-flow rate cutoff check valve for a water meter. A valve body of the micro-flow rate cutoff check valve for the water meter (101) has a fluid inlet (110) and a fluid outlet (120). The valve body (101) has a first installation space (130) in which a first valve assembly (200) is installed to be movable vertically, wherein the first installation space (130) defines a discharge hole (134) that is opened and closed by the first valve assembly (200), and the valve body (101) installs a second installation space (140). A pilot passage (150) is formed between the first installation space (130) and the second installation space (140). A second valve assembly (300) is installed to be movable left and right in the second installation space (140). The second valve assembly (300) selectively opens and closes the outlet of the pilot passage (150). According to the present invention having such a configuration, since the opening and closing of the pilot passage connected to the fluid inlet and the discharge hole connected to the fluid outlet can be accurately controlled, the micro-flow rate generated in a water meter outlet pipe can be completely blocked.

Description

Micro flow cut-off check valve for water meter {CHECK VALVE FOR BLOCKING MINUTE FLOW FOR WATER METER}

The present invention relates to a check valve to cut off a micro flow rate for a water meter, and more particularly, to a check valve to cut off a micro flow rate for a water meter, which is easy to install and is configured to block the micro flow rate.

In general, a meter that measures the amount of fluid flow is a case that passes the fluid through the case, a driving unit that is rotated by the flow of fluid flowing through the inside of the case, and a meter that rotates by receiving the rotational force of the eastern part and corresponds to the number of rotations. It can be divided into a metering part that displays the quantity externally.

The driving unit includes an impeller that is immersed in the flow field and rotates by friction with a fluid. The amount of rotation of the impeller is proportional to the flow rate and flow rate of the fluid. Therefore, as the flow rate through the drive unit increases, the impeller rotates at a faster speed, and when water passes very slowly due to a small flow rate, the impeller rotates gradually.

Since such a meter has a principle of measuring the flow rate by using friction between the impeller and the fluid, when the flow rate of the fluid is less than a certain threshold, the impeller does not rotate, and thus the flow rate may not be measured. That is, the moment the flow rate of the fluid passing through the meter gradually slows down and becomes slower than a certain critical point, the rotating impeller stops, and the flow rate of the fluid passing thereafter cannot be measured.

For example, if the inner packing of the faucet is worn, or if water with a flow rate smaller than the minimum flow rate that the meter can read is leaked drop by drop to prevent the meter from freezing in winter, the flow rate of water passing through the meter at this time. Can not be checked.

For the above reasons, water that is discarded without being metered is a waste of water resources and may lead to a huge loss of tax revenue.

In order to solve this problem, Republic of Korea Patent Publication No. 10-1246966 said that it can be installed in the inlet and outlet of the water meter or on the inside of the water meter inlet and outlet pipes in FIG. However, it does not present a configuration or technology that can be installed in practice, and all the other technical drawings suggest are only to be installed between pipes, but in reality, one side is wide and how to use the inlet pipe or outlet pipe of the water meter narrowing toward the end side. As there is no specific description or explanation as to whether it can be installed, there is no possibility of actual installation or implementation.

Korean Registered Patent Publication No. 10-1246966 (registered on March 18, 2013)

In order to achieve the above object, according to the micro-flow shut-off check valve for a water meter according to an embodiment of the present invention, it is to provide a micro-flow shut-off check valve for a water meter that is configured to block a fluid leaking minutely.

The technical problem of the present invention is not limited to those mentioned above, and another technical problem that is not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention was invented to improve the above-described problem, and the problem to be solved by the present invention is that a fluid inlet through which the fluid flowing through the outlet pipe of the water meter is introduced is formed on one side, and the fluid flows from the fluid inlet. A fluid inlet path is formed by extending a certain length in the inflow direction, a first installation space is formed at a position adjacent to the fluid inlet, a second installation space is formed above the first installation space, and the first installation A valve body having a pilot passage connecting the space and the second installation space to each other, and having a discharge hole through which the fluid flowing into the fluid inlet passage exits the outside; A first valve assembly movably installed in the first installation space to selectively open and close the discharge hole; And a second valve assembly installed to be movable in a direction perpendicular to a direction in which the first valve assembly moves in the second installation space to selectively open and close the pilot passage, wherein the valve body includes the A fluid outlet for communicating the discharge hole and the outside is formed, and a fluid path is formed between the second installation space and the fluid outlet.

The first valve assembly is characterized in that an outer surface is formed in a shape corresponding to an inner surface of the first installation space, and a piston that moves up and down according to a pressure of a fluid in the first installation space is provided.

The piston is characterized in that the piston orifice is formed to penetrate in the direction in which the piston moves.

A guide groove is formed to be concave inside the first installation space in a direction opposite to the discharge hole.

The first valve assembly is provided through the center of the piston, one end is inserted into the guide groove, the other end is located in the discharge hole, a support for selectively shielding the discharge hole according to the movement of the piston It characterized in that it is provided.

The first valve assembly may include a first elastic member provided between the piston and the first installation space while surrounding a part of the outer surface of the support to provide an elastic force to the piston.

The second valve assembly is installed to be movable in a direction perpendicular to a direction in which the first valve assembly moves in the second installation space to selectively open and close the pilot passage, and the pilot piston and the first valve assembly It is characterized in that it comprises a second elastic member provided between the two installation spaces to provide an elastic force to the pilot piston.

One side is screwed to the water outlet pipe, the other side is characterized in that it further comprises a coupling portion screwed to a position adjacent to the inner edge of the fluid inlet.

The coupling part has one end screwed with the valve body at a position adjacent to the inner edge of the fluid inlet, the other end extending in a direction away from the valve body, and one inner surface screwed with the outer surface of the water outlet pipe It is characterized in that the other inner surface is composed of a fastening member coupled to the other end of the coupling member.

A hook jaw is formed to protrude outside the other end of the coupling member, and a locking groove to which the hook jaw is hooked and fixed is formed in a concave inner surface of the other side of the fastening member.

Details of other embodiments are included in the detailed description and drawings.

According to the micro flow cut-off check valve for a water meter according to an embodiment of the present invention, opening and closing of the discharge hole and the pilot passage by control of the first and second valve assemblies that are movably installed at different positions inside the valve body Since can be accurately controlled, it has the effect of completely blocking the micro flow rate generated from the water meter outlet pipe and enabling precise metering.

In addition, according to the micro-flow cut-off check valve for a water meter according to an embodiment of the present invention, one side of the valve body is screwed to the water outlet pipe, and the other side is a coupling portion screwed to a position adjacent to the inner edge of the fluid inlet. It is equipped. Therefore, since it can be easily installed on the pipe or the water outlet pipe, there is also an effect of easy maintenance.

The effects of the present invention are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a cross-sectional view showing a state in which a micro-flow shutoff check valve for a water meter according to an embodiment of the present invention is installed in a water outlet pipe of a water meter.
2 is a cross-sectional view showing the configuration of a micro-flow shutoff check valve for a water meter according to an embodiment of the present invention.
3 is a cross-sectional view showing a partial configuration of a micro-flow shutoff check valve for a water meter according to an embodiment of the present invention.
4 to 6 are operational state diagrams showing the configuration of a micro-flow shutoff check valve for a water meter according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings to the extent that those of ordinary skill in the art can easily implement the present invention.

In describing the embodiments, descriptions of technical contents that are well known in the technical field to which the present invention pertains and are not directly related to the present invention will be omitted. This is to more clearly convey the gist of the present invention by omitting unnecessary description.

For the same reason, some components in the accompanying drawings are exaggerated, omitted, or schematically illustrated. In addition, the size of each component does not fully reflect the actual size. The same reference numerals are assigned to the same or corresponding components in each drawing.

1 is a cross-sectional view showing the configuration of a micro-flow shutoff check valve for a water meter according to an embodiment of the present invention.

As shown in FIG. 1, the micro flow cut-off check valve 100 (hereinafter referred to as a'check valve') for a water meter may be mounted on the water outlet pipe 11 of the water meter 10 and used. In this embodiment, the check valve 100 is for completely blocking the micro flow rate generated in the water meter outlet pipe 11 and enabling precise metering at the same time.

As shown in Figure 2, the outer appearance and skeleton of the check valve 100 may be formed by the valve body 101. A fluid inlet 110 is formed in the valve body 101. The fluid inlet 110 is a portion through which the fluid introduced through the water outlet pipe 11 of the water meter 10 is introduced.

A fluid inflow path 111 is formed inside the valve body 101. The fluid inlet passage 111 is formed to extend a predetermined length in a direction in which the fluid flows from the fluid inlet 110. The fluid inlet passage 111 serves as a passage through which a fluid flows.

A fluid outlet 120 is formed in the valve body 101. The fluid outlet 120 is a part through which the fluid introduced into the valve body 101 exits. That is, the fluid outlet 120 serves to communicate the discharge hole 134 and the outside. And in this embodiment, the fluid outlet 120 is connected to the discharge hole 134 and the fluid passage 160 to be described below, so that the fluid escapes through the fluid outlet 120.

A first installation space 130 is formed in the valve body 101. The first installation space 130 is formed at a position adjacent to the fluid inlet I10. The first installation space 130 is a portion in which the first valve assembly 200 to be described below is movably installed.

A guide groove 132 may be formed inside the first installation space 130. The guide groove 132 is a portion in which one end of the support 230 to be described below is inserted and moved. The guide groove 132 is formed to be concave in a direction opposite to the discharge hole 134 to be described below.

A discharge hole 134 is formed in the valve body 101. The discharge hole 134 is a part through which the fluid introduced into the fluid inlet 111 exits. The discharge hole 134 is formed in a direction orthogonal to a direction in which the fluid inlet passage 111 extends. One side of the discharge hole 134 is connected to the fluid inlet passage 111 and the other side is connected to the fluid outlet 120. The inside of the discharge hole 134 may be formed in a shape corresponding to the outside of the other end of the support 230 to be described below. The discharge hole 134 is opened and closed by the other end of the support 230 to be described below.

As shown in FIG. 1, a second installation space 140 is formed in the valve body 101. The second installation space 140 is formed above the first installation space 130. The second installation space 140 is a portion in which the second valve assembly 300 to be described below is movably installed.

A pilot passage 150 may be formed between the first installation space 130 and the second installation space 140. The pilot passage 150 serves to connect the first installation space 130 and the second installation space 140. That is, the inlet side of the pilot passage 150 is connected to the first installation space 130, and the outlet side is connected to the second installation space 140, so that the fluid flowing into the first installation space 130 is It may be moved to the second installation space 140 through the pilot passage 150. In this embodiment, the intermediate portion of the pilot passage 150 is formed to extend a predetermined length in the vertical direction.

A fluid passage 160 may be formed between the second installation space 140 and the fluid outlet 120. The fluid passage 160 serves to connect the second installation space 140 and the fluid outlet 120. That is, the fluid introduced into the second installation space 140 may be moved to the fluid outlet 120 through the fluid passage 160.

Meanwhile, as shown in FIG. 1, the first valve assembly 200 is movably installed in the first installation space 130. The first valve assembly 200 serves to selectively open and close the discharge hole 134.

In this embodiment, the first valve assembly 200 is provided with a piston 210. The outer surface of the piston 210 may be formed in a shape corresponding to the inner surface of the first installation space 130. The piston 210 may move up and down according to the pressure of the fluid. The piston 210 also serves to divide the first installation space 130 into a first space 130a and a second space 130b.

A piston orifice 220 may be formed in the piston 210. The orifice 220 may be formed to penetrate in a direction in which the piston 210 moves. Accordingly, the first space 130a and the second space 130b of the first installation space 130 partitioned by the piston 210 can maintain the same pressure.

As shown in FIG. 1, a support 230 is provided on the first valve assembly 200. The support 230 is provided through the center of the piston 210. The support 230 is formed to extend in a direction parallel to a direction in which the piston 210 moves. One end of the support 230 is inserted into the guide groove 132, and the other end is located in the discharge hole 134. The other end of the support 230 selectively shields the discharge hole 134 according to the movement of the piston 210.

As shown in FIG. 1, the first valve assembly 200 is provided with a first elastic member 240. The first elastic member 240 is provided between the piston 210 and the first installation space 130 while covering a part of the outer surface of the support 230. The first elastic member 240 serves to restore the piston 210 to its original position. That is, the first elastic member 240 serves to provide an elastic force to the piston 210. In this embodiment, the length, diameter, and thickness of the first elastic member 240 may be adjusted according to the pressure of the fluid.

Meanwhile, as shown in FIG. 1, a second valve assembly 300 is movably installed in the second installation space 140. The second valve assembly 300 is installed to be movable in a direction orthogonal to a direction in which the first valve assembly 200 moves. The second valve assembly 300 serves to block a minutely leaking fluid.

A pilot piston 310 is provided in the second valve assembly 300. The pilot piston 310 is installed in the second installation space 140 to be movable in a direction orthogonal to a direction in which the first valve assembly 200 moves. The pilot piston 310 serves to selectively open and close the outlet of the pilot passage 150. The pilot piston 310 may be moved left and right according to the pressure of the fluid.

A second elastic member 320 is provided between the pilot piston 310 and the second installation space 140. The second elastic member 320 serves to restore the pilot piston 310 to its original position. That is, the second elastic member 320 serves to provide an elastic force to the pilot piston 310. In this embodiment, the length, diameter, and thickness of the second elastic member 320 may be adjusted according to the pressure of the fluid.

On the other hand, as shown in Figure 3, the valve body 101 may be provided with a coupling portion 400. The coupling part 400 is for coupling the valve body 101 to the water outlet pipe 11 of the water meter 10.

In this embodiment, the coupling part 400 may be composed of a coupling member 410 and a coupling member 420. The coupling member 410 is fixed to the water outlet pipe 11 by fastening the coupling member 420 to the water outlet pipe 11 while being coupled to the coupling member 420.

As shown in Figure 3, the coupling member 410 is formed to protrude in a direction away from the valve body 101 from the fluid inlet 110. That is, the coupling member 410 has a substantially cantilever shape, one end is screwed with the valve body 101 at a position adjacent to the inner edge of the fluid inlet 110, the other end is away from the valve body 101 Extends in the direction At this time, a thread having a shape corresponding to one end of the coupling member 410 is formed on the valve body 101 at a position adjacent to the inner edge of the fluid inlet 110.

A hook jaw 412 is formed outside the other end of the coupling member 410. The hook jaw 412 is formed to protrude from the outer edge of the other end of the coupling member 410 toward the hook groove 422 to be described below. The hook jaw 412 is a portion that is hooked to the locking groove 422, and at the same time the hook jaw 412 is hooked to the locking groove 422, the coupling member 410 is attached to the fastening member 420 Are combined.

As shown in Fig. 3, the fastening member 420 has a substantially nut shape, and corresponds to a screw groove 12 formed on the outer surface of the water outlet pipe 11 on an inner surface of one side of the fastening member 420 A screw thread 421 having a shape may be formed. Accordingly, one side of the inner surface of the fastening member 420 may be screwed with the water outlet pipe 11.

A locking groove 422 may be formed in a concave inner surface of the other side of the fastening member 420. The locking groove 422 is a portion to which the hook jaw 412 is hooked and fixed. The locking groove 422 may be formed in a shape corresponding to the hook jaw 412.

Although not shown, an O-ring may be provided between the fastening member 420 and the valve body 101. The O-ring is made of natural rubber, synthetic rubber, synthetic resin rubber, etc., and is used to prevent fluid from leaking to the outside.

A method of fixing the valve body 101 to the water outlet pipe 11 using the coupling part 400 configured as described above is as follows.

The hooking jaw 412 of the coupling member 410 is first coupled to the hooking groove 422 of the fastening member 420. And the coupling member 410 is screwed to the valve body 101.

Next, when the fastening member 420 is screwed with the water outlet pipe 11, the valve body 101 is fixed to the water outlet pipe 11. In this way, the valve body 101 can be easily coupled to the water outlet pipe 11 by the coupling portion 400, and at the same time, disassembly is also effective for maintenance and the like.

Next, with reference to the drawings, a description will be given of an operation process of the microflow shutoff check valve for a water meter according to an embodiment of the present invention.

As shown in FIG. 4, when the fluid leaked finely through the water outlet pipe of the water meter 10 flows into the fluid inlet 110 of the valve body 101, it moves to the first installation space 130 Is done.

At this time, since the movement of the fluid is restricted by the first valve assembly 200, as shown in FIG. 5, when the fluid continues to accumulate in the fluid inlet path 111 and the water level starts to rise above the piston 210, as shown in FIG. , Starts to move to the pilot passage 150 through the piston orifice 220.

In this way, when the fluid continues to move toward the pilot passage 150 and pressure is continuously applied, the pilot piston 310 moves by overcoming the elastic force of the second elastic member 320, and the pilot passage ( 150) is opened.

At the same time, the fluid passes through the outlet of the pilot passage 150 and is discharged to the fluid outlet 120 through the fluid passage 160.

On the other hand, when water is normally used, or when the internal pressure of the valve increases due to an increase in flow rate, a pressure drop occurs due to the flow resistance of the piston orifice 220, and the first installation space As a pressure difference occurs between the first space 130a and the second space 130b of 130, the piston 210 rises while overcoming the elastic force of the first elastic member 240.

At the same time, the support 230 also rises to open the discharge hole 134, so that the fluid passes through the discharge hole 134 and is discharged to the fluid outlet 120.

In addition, a part of fluid is also discharged to the fluid outlet 120 through the pilot passage 150 and the fluid passage 160 through the piston orifice 220.

When such a pressure difference, that is, when the check valve is in an inactive state, the pilot passage 150 and the discharge hole 134 formed therein are blocked, so that even the minute flow rate flowing into the inside of the valve body 101 is completely blocked. You will be able to.

Meanwhile, the present specification and drawings disclose preferred embodiments of the present invention, and although specific terms are used, these are merely used in a general meaning to easily explain the technical content of the present invention and to aid understanding of the present invention. It is not intended to limit the scope of the invention. It is obvious to those of ordinary skill in the art that other modifications based on the technical idea of the present invention can be implemented in addition to the embodiments disclosed herein.

10: water meter 11: water outlet
100: check valve
101: valve body
110: fluid inlet 111: fluid inlet
120: fluid outlet
130: first installation space 140: second installation space
150: pilot passage 160: fluid passage
200: first valve assembly 210: piston
220: piston orifice 230: support
240: first elastic member 300: second valve assembly
310: pilot piston 320: second elastic member
400: coupling portion
410: coupling member 412: hook jaw
420: fastening member 421: thread
422: locking groove

Claims (10)

On one side, a fluid inlet through which the fluid flowing through the outlet pipe of the water meter is introduced is formed, and a fluid inlet path is formed by extending a predetermined length in a direction in which the fluid is introduced from the fluid inlet, and a fluid inlet path is formed at a position adjacent to the fluid inlet. 1 installation space is formed, a second installation space is formed above the first installation space, a pilot passage connecting the first installation space and the second installation space to each other is formed, and flows into the fluid inflow path A valve body in which a discharge hole through which the fluid is discharged is formed;
A first valve assembly movably installed in the first installation space to selectively open and close the discharge hole; And
And a second valve assembly installed to be movable in a direction perpendicular to a direction in which the first valve assembly moves in the second installation space to selectively open and close the pilot passage, and
The valve body is formed with a fluid outlet communicating the discharge hole and the outside,
A fine flow cut-off check valve for a water meter, characterized in that a fluid passage is formed between the second installation space and the fluid outlet.
The method of claim 1,
In the first valve assembly,
An outer surface is formed in a shape corresponding to the inner surface of the first installation space, and a piston that moves up and down according to the pressure of the fluid in the first installation space is provided.
The method of claim 2,
A micro flow cut-off check valve for a water meter, characterized in that the piston has a piston orifice formed therethrough in a direction in which the piston moves.
The method of claim 3,
A fine flow cut-off check valve for a water meter, characterized in that a guide groove is formed to be concave in a direction opposite to the discharge hole inside the first installation space.
The method of claim 4,
In the first valve assembly,
It is provided through the center of the piston, one end is inserted into the guide groove, the other end is located in the discharge hole, characterized in that it is provided with a support for selectively shielding the discharge hole according to the movement of the piston Micro flow cut-off check valve for water meters.
The method of claim 5,
In the first valve assembly,
And a first elastic member provided between the piston and the first installation space while surrounding a part of the outer surface of the support to provide an elastic force to the piston.
The method of claim 6,
The second valve assembly,
A pilot piston installed to be movable in a direction perpendicular to a direction in which the first valve assembly moves in the second installation space to selectively open and close the pilot passage, and
And a second elastic member provided between the pilot piston and the second installation space to provide an elastic force to the pilot piston.
The method of claim 7,
One side is screwed to the water outlet pipe, and the other side is a micro flow cut-off check valve for a water meter, characterized in that it further comprises a coupling portion screwed to a position adjacent to the inner edge of the fluid inlet.
The method of claim 8,
The coupling part,
A coupling member whose one end is screwed with the valve body at a position adjacent to the inner edge of the fluid inlet, and the other end extends in a direction away from the valve body, and
One inner surface is screwed to the outer surface of the water outlet pipe, and the other inner surface is composed of a fastening member that is coupled to the other end of the coupling member.
The method of claim 9,
A fine flow cut-off check valve for a water meter, characterized in that a hook jaw is formed to protrude outside of the other end of the coupling member, and a hook groove to which the hook jaw is hooked and fixed is formed in a concave inner surface of the other side of the coupling member .

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