KR101069529B1 - A Valve of Double Anti-Reverse Type - Google Patents

Abstract

The present invention relates to a non-return valve, comprising: a first connecting tube having a flow passage formed therein so as to allow fluid to pass therethrough, and having a support plate protruding toward the center portion in the middle of the length; First backflow prevention means provided in the first connection pipe and blocking one of the inner flow paths by contacting one side of the support plate; A second connecting pipe having one side connected to the first connecting pipe and having a passage formed therein so as to allow fluid to pass therethrough, and having a stepped portion protruding toward the center in the middle of the length; Second backflow prevention means provided in the second connection pipe to block the internal flow path; And a fixing nut for coupling the first connecting pipe and the second connecting pipe, wherein the second backflow preventing means includes a sheet provided inside the second connecting pipe, and one side of the sheet is in contact with the other side. And a blocking disk that contacts the stepped portion and blocks the internal flow path, and an elastic member coupled to one side of the blocking disk.

Backflow, Check, Valve, Backflow Prevention, Airtight Ring, O-Ring, Rib

Description

A valve of double anti-reverse type

The present invention relates to a non-return valve, and more particularly, to a double check valve for preventing the fluid remaining in the water supply pipe flows back to the main supply pipe when the water supply is cut because of the construction of the main supply pipe.

In general, the water supplied to the water meter and supplied through the meter is supplied to the home or other business through the water supply pipe, which flows in one direction due to the pressure of the water, but tap water in the case of water supply due to reasons such as construction of the water pipe. The supply of water is cut off, which lowers the pipe pressure of the water pipe, and the tap water flows back toward the main supply pipe.

In order to prevent the reverse flow of tap water as described above, a double backflow check valve has been proposed to prevent the tap water supplied through the connecting pipe from flowing back toward the meter by providing a backflow preventing means between the water meter and the connecting pipe.

However, the conventional non-return valve has a standardized length of 55 mm as a single body, which makes it difficult to install between the outlet and the connection pipe of the water meter.

In addition, the conventional non-return valve has a problem that the flow rate is reduced by the frictional force with the component in the course of the tap water is made of a number of components to prevent the back flow of the tap water.

The present invention has been made to solve the above problems, it is to provide a double non-return valve is easy installation installation by combining the first connecting pipe and the second connecting pipe by a fixing nut.

In addition, the present invention is to provide a double check valve to reduce the friction between the tap water and the components and to secure a space through which the tap water can pass by simplifying the components of the backflow prevention means for preventing the backflow of the tap water .

In addition, the present invention is to provide a double back flow prevention valve having a first and second reverse flow prevention means inside the double back flow prevention valve to double the flow of the tap water supplied through the connecting pipe back to the meter.

In order to achieve the above object, the present invention includes a first connecting pipe having a passage formed therein so as to allow fluid to pass therethrough, and having a support plate protruding toward the center portion in the middle of the length thereof; First backflow prevention means provided in the first connection pipe and blocking one of the inner flow paths by contacting one side of the support plate; A second connecting pipe having one side connected to the first connecting pipe and having a passage formed therein so as to allow fluid to pass therethrough, and having a stepped portion protruding toward the center in the middle of the length; Second backflow prevention means provided in the second connection pipe to block the internal flow path; And a fixing nut for coupling the first connecting pipe and the second connecting pipe, wherein the second backflow preventing means includes a sheet provided inside the second connecting pipe, and one side of the sheet is in contact with the other side. It provides a double backflow check valve comprising a blocking disk for contacting the stepped portion to block the internal flow path, and an elastic member coupled to one side of the blocking disk.

Preferably, the first backflow prevention means is a blocking disk for blocking the inner passage by one side in contact with the support plate, an elastic member coupled to one side of the blocking disk, and a support cap coupled to one side of the elastic member It may include.

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Preferably, the blocking disk may include a body having an inclined surface formed on one side thereof, and a plurality of ribs formed in a longitudinal direction along an outer circumferential surface of the body.

Preferably, the inclined surface has a recessed portion formed along the outer peripheral surface in the middle of the length, may be provided with an airtight ring inserted into the recessed portion.

Preferably, the blocking disk may be further provided with a reinforcing rib connecting the plurality of ribs.

Preferably, the sheet is hollow to have an inner circumferential surface and an outer circumferential surface, the inner circumferential surface of the first inclined portion is formed to be inclined so that fluid can easily be introduced into one side and the inclined surface of the blocking disk to be easily inserted into the other side. It may be provided with a second inclined portion to be formed.

Preferably, the fixing nut may be further provided with a locking step extending toward the center on one side.

Preferably, the second connecting pipe is provided with a recessed groove recessed at one end connected to the first connector, the hermetic ring may be inserted into the mounting groove.

According to the present invention as described above, there is an effect that the first connecting pipe and the second connecting pipe can be easily installed between the meter and the water supply pipe by being coupled by a fixing nut.

In addition, the present invention can be expected to improve the flow rate of about 20% by simplifying the components of the non-return means for preventing the back flow of the fluid to reduce the friction between the fluid and the components and to secure a space for the fluid to pass through .

In addition, the present invention has the effect of preventing the water pollution and the malfunction of the meter by double blocking the flow of the back flow from the water supply pipe to the meter by providing a first and second reverse flow prevention means inside the double backflow prevention valve.

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

1 is an exploded perspective view of a double non-return valve in accordance with an embodiment of the present invention, Figure 2 is a cross-sectional view of the combined state of the double check valve in accordance with an embodiment of the present invention, Figure 3 is a double in accordance with an embodiment of the present invention Figure 4 is a cross-sectional view showing a seat of the non-return valve, Figure 4 is a cross-sectional view showing the operating state of the double check valve in accordance with an embodiment of the present invention, a) is a state in which the back flow prevention means is closed b) is open 5 is a cross-sectional view showing a construction state of the double check valve according to an embodiment of the present invention, a) is a state in which the back flow prevention means is closed b) is a cross-sectional view showing the state in which the back flow prevention means is open to be.

1 and 2, the double check valve 100 according to the present invention is the first connecting pipe 110, the second connecting pipe 120, the first backflow preventing means 130, the second It includes a backflow preventing means 140 and the fixing nut 150.

The inside of the first connecting pipe 110 is provided with a hollow portion 112 formed to pass through the fluid, the thread 111 to be coupled to the discharge pipe (2) of the meter (1) on one side inside Is formed, the support cap seating groove 118 is formed on the other side is the support cap to be described later is formed, the support plate 114 is formed to protrude toward the center in the middle of the length.

The support plate 114 is formed perpendicular to the inflow direction of the fluid flowing from the discharge pipe (2), the central region so that the fluid can pass through the hollow portion 112 to the first backflow prevention means (130) The opening formed in the through is provided in a hollow.

The opening allows one side of the first backflow preventing means 130 to be described later to be inserted or separated to allow fluid to move from the water meter 1 to the water supply pipe 3, and from the water supply pipe 3 to the water meter 1. One side of the first backflow preventing means 130 is seated to prevent backflow.

The first backflow preventing means 130 is seated in the hollow portion 112 of the first connecting pipe 110 and opens and closes the opening provided in the central region of the support plate 114 to pass through the hollow portion 112. To prevent or allow the flow of the fluid to prevent the back flow of the fluid from the water supply pipe (3) to the water meter (1), and includes a blocking disk 131, elastic member 134 and the support cap 136.

The blocking disk 131 is provided with a body 132 having an inclined surface formed on one side and a plurality of ribs 133 formed in a longitudinal direction along the outer circumferential surface of the body 132, and the plurality of ribs 133. Each of the projections (133a) protruding outward is provided on one side.

The plurality of ribs 133 are formed at regular intervals along the outer circumferential surface of the body 132 to secure a space between the ribs 133 and the neighboring ribs 133 so that the fluid can move, the plurality of ribs An annular reinforcing rib 133 connecting 133 is provided in the middle or the end of the annular ribs 133 so as to prevent breakage of each rib by hydraulic pressure.

Such a blocking disk 131 is inserted into the opening to block the flow of the fluid or the inclined surface is separated from the opening serves to allow the flow of the fluid.

At this time, the inclined surface is provided with an airtight ring 132c in the recess 132b recessed along the outer circumferential surface in the middle of the length, thereby preventing the fluid from leaking into the gap when the inclined surface is inserted into the opening to block the flow of the fluid. can do.

One side of the elastic member 134 is seated on the protrusion 133a formed to the outside of the ribs 133, and a hollow support cap 136 is provided on the other side of the elastic member 134. The support cap 136 is to be seated in the support cap seating groove 118 in addition to the support plate 114, the elastic member 134 and the blocking disk 131 in the interior of the first connecting pipe (110) Prevent deviations.

The inside of the second connecting pipe 120 is formed with a hollow portion 122 through which the fluid can pass, and a thread 121 is formed on the outer side so as to be coupled to the water supply pipe 3. The seat seating groove 129 is provided on the surface. A thread 123 is formed on the outside of the other side so as to be coupled to the fixing nut 150, and a stepped part 124 protruding toward the center portion is provided in the middle of the length of the elastic member 144. Do not let one side of the deviate.

The second reverse flow preventing means 140 is seated in the hollow portion 122 of the second connecting pipe 120, allowing the fluid to move from the water meter 1 to the water supply pipe 3, and the water supply pipe 3. Backflow from the water meter to 1 is prevented.

The second backflow prevention means 140 includes a sheet 146 formed in a hollow to allow fluid to pass therethrough and seated in the seat seating groove 129, a blocking disk 141, and an elastic member 144. .

The sheet 146 is provided with a first inclined portion 146a along the inner circumferential surface on one side, and a second inclined portion 146b along the inner circumferential surface on one side thereof, and a recessed portion formed along the outer circumferential surface on the outside thereof ( 146c is provided and the hermetic ring 146d is inserted. The sheet 146 is formed of a plastic material, and performs the same role as the support plate 114 provided in the first connection pipe 110.

On the inner circumferential surface of the sheet 146, a hollow in which the first inclined portion 146a is formed in the central region of the sheet 146 is formed to widen toward the first connecting pipe 110. It is provided to reduce the resistance of the fluid flowing into the second connecting pipe 120 to be easily introduced. And the second inclined portion 146b is formed so that the hollow formed in the central region of the sheet 146 widens toward the water supply pipe 3 so that the inclined surface provided in the blocking disk 141 to be described later can be easily inserted. It is formed at the same angle as the angle of the inclined surface.

The blocking disk 141 is provided with a body 142 having an inclined surface formed on one side thereof and a plurality of ribs 143 formed in a longitudinal direction along the outer circumferential surface of the body 142, and the plurality of ribs 143. Each side is provided with protrusions 143a protruding outward.

The plurality of ribs 143 are formed at regular intervals along the outer circumferential surface of the body 142 to secure a space between the ribs 143 and the neighboring ribs 143 so that the fluid can move, the plurality of ribs An annular reinforcing rib 143b connecting 143 is provided in the middle or the end of the ring to prevent the rib from being broken by hydraulic pressure.

The blocking disk 141 is inserted into the hollow portion of the sheet 146 to block the flow of the fluid or the inclined surface is separated from the hollow portion serves to allow the flow of the fluid.

At this time, the inclined surface is provided with an airtight ring 142c in the groove portion 142b which is formed along the outer circumferential surface in the middle of the length, the fluid is leaked into the gap when the inclined surface is inserted into the hollow to block the flow of the fluid. It can prevent.

A protrusion 143a is formed on the outside of the ribs 143 so that one side of the elastic member 144 is seated.

The double check valve 100 configured as described above inserts the inclined surface of the blocking disk 131 into the opening formed in the support plate 114 and inserts the elastic member 134 to the outside of the plurality of ribs 133. Inserting the support cap 136 into the cap seating groove 118 to form a first connecting pipe 110, the second connecting pipe 120 so that one side of the elastic member 144 is fixed to the stepped portion 124. The second connecting pipe 120 is configured by inserting the blocking disk 141 into the hollow of the elastic member 144 and inserting the sheet 146 into the seat seating groove 126.

One side of the support cap 136 and one side of the seat 146 is in contact with the first connecting pipe 110 and the second connecting pipe 120 provided as described above and the hollow portion of the first connecting pipe 110 ( 112 and the hollow portion 122 of the second connecting pipe 120 are arranged to be connected, and then the screw is connected to the first connecting pipe 110 and the second connecting pipe 120 using the fixing nut 150. To combine.

At this time, one side of the fixing nut 150 is provided with a locking jaw 152 extending toward the center to the first connecting pipe 110 when the first connecting pipe 110 and the second connecting pipe 120 is coupled. To extend to the outside on one side of the projection 116 is formed to be protruding, using the screw thread (150a) formed in the interior of the fixing nut 150 and the screw thread 123 formed on one side of the second connecting pipe (120) The first connecting pipe 110 and the second connecting pipe 120 to be coupled.

Thus, the double check valve 100 of the present invention is installed between the meter (1) and the water supply pipe (3) the first connecting pipe 110 and the second connecting pipe (120) meter (1) and water supply pipe ( After each installation in 3) by fastening the fixing nut 150 it can be easily installed by combining and fixing the first connecting pipe 110 and the second connecting pipe 120.

On the other hand, the airtight ring 128 in the mounting groove 126 is formed recessed in one end of the second connecting pipe 120 in order to maintain the airtightness in the coupling portion of the first connecting pipe 110 and the second connecting pipe 120 By inserting the fluid may be prevented from leaking in the coupling portion of the first connecting pipe 110 and the second connecting pipe 120.

The present invention configured as described above is connected between the discharge pipe (2) of the meter (1) for supplying the fluid from the main supply pipe and the water supply pipe (3) supplied from the discharge pipe to the room, the fluid supplied through the meter (1) again This prevents the flow back to the meter (1) and the discharge pipe (2).

Figure 4b) and Figure 5b) is a cross-sectional view showing an open state of the first, second backflow prevention means of the double check valve according to the present invention, Figure 7 is a first, second backflow of the double backflow check valve according to the present invention It is a photograph quantitatively analyzing and showing the flow of the flow rate when the prevention means is open. When the fluid is supplied from the main supply pipe (not shown) to the water supply pipe 3 through the discharge pipe 2 through the meter 1, The blocking disk 131 of the first backflow prevention means 130 receives a force by the pressure of the supplied fluid and is separated from the opening formed in the central region of the support plate 114.

In this case, when the blocking disk 131 is subjected to the force, the elastic member 134 provided in the first connecting pipe 110 is subjected to the force by the protrusion 133a provided on the outside of the plurality of ribs 133. By the force, it is retracted while being pressed together with the blocking disk 131. The elastic member 134 and the blocking disk 131 retracted backward by hydraulic pressure are pressed by the support cap 136 provided in the support cap seating groove 118 and the pressure of the fluid flowing from the meter 1. It is maintained, the opening formed in the central region of the support plate 114 is opened so that the fluid flows smoothly.

Meanwhile, the fluid passing through the opening passes through the first backflow preventing means 130 without any jamming through the space portion formed between the plurality of ribs 133 formed at predetermined intervals in the blocking disk 131 to connect the second connection pipe. It is moved to the (120) side.

As described above, the fluid passing through the first backflow prevention means 130 flows into the second backflow prevention means 140 seated inside the second connection pipe 120 and into the second backflow prevention means 140. The flowed fluid is supplied to the water supply pipe 3 by the same action as the first backflow preventing means 130.

That is, the fluid flowing into the second connecting pipe 120 from the first connecting pipe 110 through the hollow formed in the central region of the sheet 146 is the second backflow prevention means 140 by the pressure of the fluid. Is blocked from the hollow formed in the central region of the sheet 146.

At this time, when the blocking disk 141 is subjected to a force, the elastic member 144 provided in the second connecting pipe 120 is subjected to the force by the protrusion 143a provided on the outside of the plurality of ribs 143. By the force, it is retracted while being pressed together with the blocking disk 141. The elastic member 144 and the blocking disk 141, which are retracted backward by hydraulic pressure, are pressed by the pressure of the fluid flowing from the meter 1 and the stepped portion 124 formed at one inner side of the second connecting pipe 120. It is maintained in a state, and the hollow formed in the central area of the sheet 146 is opened so that the fluid flows smoothly.

On the other hand, the fluid passing through the hollow is passed through the second backflow prevention means 140 without any catch through the space portion formed between the plurality of ribs 143 formed at regular intervals in the blocking disk 141, the fluid is supplied to the water supply pipe ( 3) is supplied.

Foreclosure
(Bar) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 flux
(LPM) 8.0 11.3 13.9 16.0 17.9 19.6 21.2 22.7 24.0 25.3

                                                                    Standard flow

Foreclosure
(Bar) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 flux
(LPM) 14.2 21.0 25.5 29.5 33.2 36.3 39.4 42.0 44.8 47.0

                                                              Conventional Backflow Valve

Foreclosure
(Bar) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 flux
(LPM) 16.5 26.8 32.6 37.5 42.0 45.8 49.2 52.5 55.2 58.0

                                           Double check valve of the present invention

Table 1 shows the standard flow rate applied to the conventional backflow valve, Table 2 shows the flow rate shown according to the differential pressure in the conventional backflow valve, Table 3 shows the flow rate shown according to the differential pressure in the double check valve of the present invention It is shown.

And Figure 6 is a graph comparing the performance of the flow rate according to the differential pressure and the conventional double check valve of the present invention, black is the reference flow rate, blue is the conventional valve, red is the double check valve of the present invention.

Comparing Table 2 and Table 3, the flow rate flowing inside the valve at the same differential pressure of 0.4Bar is 29.5LPM of the conventional check valve, whereas the flow rate shown in the non-return valve of the present invention is 37.5LPM, and the flow rate is improved by about 20% or more. You can see the effect.

This is because the components of the non-return means provided in the double non-return valve of the present invention is not only to minimize the friction force between the fluid and the components passing through the valve, but also connected to the discharge pipe of the meter, the first connection flows in As the inner width of the pipe and the inner width formed between the second backflow preventing means and the first backflow preventing means are equal, the maximum flow space is secured to maximize the space through which the fluid can pass. The effect will appear.

Figures 4a) and 5a) is a cross-sectional view showing a state in which the first and second backflow prevention means (130,140) of the double check valve 100 according to the invention is closed, the fluid supplied by the operation as shown in Figure 5a In the case of being cut in number due to the construction of the supply pipe, the blocking disks 131 and 141 are returned by the return force of the elastic members 134 and 144 and the pressure of the tap water to flow back, and the openings formed in the central region of the support plate 114 and the It is inserted into the hollow formed in the central region of the sheet 146 to block the back flow of the fluid.

At this time, the blocking disk 141 of the second backflow prevention means 140 having the airtight ring 142c on the inclined surface 142a is inserted into the hollow formed in the central region of the seat 146 to primarily reverse the flow of fluid. And the blocking disk 131 of the first backflow preventing means 130 having the airtight ring 132c on the inclined surface 132a is inserted into the opening formed in the central region of the support plate 114 to prevent the second backflow preventing means. By secondly blocking the fluid leaking and flowing back at 140, the backflow of the fluid can be prevented twice.

By blocking the flow path through which fluid may flow due to the return of the blocking disks 131 and 141, the fluid supplied toward the double backflow prevention valve 100 when the supply of the fluid is stopped by the main supply pipe (not shown) It is possible to prevent the flow back toward the meter (1).

As described above, the present invention includes the first and second reverse flow prevention means (130, 140) inside the double check valve to block the back flow of the fluid from the water supply pipe to the meter, thereby preventing water pollution and malfunction of the meter. have.

Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to this specific structure. Those skilled in the art will be able to variously modify or change the embodiments of the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. However, it will be apparent in advance that modifications or design variations of such a simple embodiment are all within the scope of the present invention.

1 is an exploded perspective view of a double check valve according to an embodiment of the present invention.

Figure 2 is a cross-sectional view of the combined state of the double check valve in accordance with an embodiment of the present invention.

Figure 3 is a cross-sectional view showing a seat of the double check valve in accordance with an embodiment of the present invention.

Figure 4 is a cross-sectional view showing an operating state of the double backflow check valve according to an embodiment of the present invention, a) is a state in which the backflow prevention means closed b) is a cross-sectional view showing the state in which the backflow prevention means open.

Figure 5 is a cross-sectional view showing a construction state of the double backflow check valve according to an embodiment of the present invention, a) is a state in which the backflow prevention means closed b) is a cross-sectional view showing a state in which the backflow prevention means open.

Figure 6 is a flow chart showing the results of the quantitative analysis in the double check valve in accordance with an embodiment of the present invention.

Figure 7 is a graph comparing the performance of the flow rate according to the differential pressure of the present invention and the conventional valve.

-Explanation of symbols for the main parts of the drawings

100: double check valve 110: first connection pipe

112: hollow part 114: support plate

116: protrusion 118: support cap seating groove

120: second connecting pipe 122: hollow part

124: step 126: seating groove

128: air tight ring 129: seat seating groove

130: first backflow prevention means 131: blocking disk

132: body 132b: groove

132c: Hermetic ring 133: Rib

133a: projection 133b: reinforcement rib

134: elastic member 136: support cap

140: second backflow prevention means 141: blocking disk

142 body 142a inclined surface

142b: groove 142c: air tight ring

143: rib 143a: protrusion

143b: reinforcing rib 144: elastic member

146: sheet 146a: first inclined portion

146b: second inclined portion 150: fixing nut

152: jamming jaw

Claims (9)

A first connection pipe having a flow passage formed therein to allow the fluid to pass therethrough, and having a support plate protruding toward the center portion in the middle of the length thereof; First backflow prevention means provided in the first connection pipe and blocking one of the inner flow paths by contacting one side of the support plate; A second connecting pipe having one side connected to the first connecting pipe and having a passage formed therein so as to allow fluid to pass therethrough, and having a stepped portion protruding toward the center in the middle of the length; Second backflow prevention means provided in the second connection pipe to block the internal flow path; And Includes; a fixing nut for coupling the first connector and the second connector; The second backflow preventing means includes a sheet provided inside the second connecting pipe, a blocking disk on one side of the sheet contacting the other side and the other side of the stepping portion to block the internal flow path, and one side of the blocking disk. Double check valve, characterized in that it comprises an elastic member coupled to. The method of claim 1, The first backflow preventing means includes a blocking disk for blocking the inner flow path by one side contacting the support plate, an elastic member coupled to one side of the blocking disk, and a support cap coupled to one side of the elastic member. Double check valve. delete 3. The method according to claim 1 or 2, The blocking disk is a double check valve, characterized in that it comprises a body formed with a slope on one side, and a plurality of ribs formed in the longitudinal direction along the outer peripheral surface of the body. The method of claim 4, wherein The inclined surface is provided with a recess groove formed along the outer circumferential surface in the middle of the length, double backflow prevention valve, characterized in that the airtight ring is inserted into the groove. The method of claim 4, wherein The blocking disk is a double check valve, characterized in that further provided with a reinforcing rib connecting the plurality of ribs. The method of claim 1, The sheet is formed in a hollow to have an inner circumferential surface and an outer circumferential surface, the inner circumferential surface is formed so that the inclined surface of the blocking disk can be easily inserted into the first inclined portion and the other side is formed to be inclined so that fluid can easily flow into one side Double check valve, characterized in that provided with a second inclined portion. The method of claim 1, Double fixing valve is characterized in that the fixing nut is further provided with a locking step extending toward the center on one side. The method of claim 1, The second connecting pipe is provided with a seating groove recessed in one end connected to the first connector, the double check valve, characterized in that the airtight ring is inserted into the seating groove.

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