KR200415992Y1 - CONNECTOR FOR Flowing backward prevention - Google Patents

Abstract

The present invention relates to a non-return connector, and more specifically, by installing a check valve inside the connector installed between the outlet pipe of the water meter and the inlet pipe of the water supply pipe, the tap water of the water supply pipe during the maintenance work of the corroded drainage pipe The present invention relates to a backflow preventing connector that prevents backflow and facilitates replacement and installation of a drain pipe and a water meter.

The reverse flow prevention connector according to the present invention is a stepped groove formed at one end, and formed in the other end direction of the stepped integrally and smaller than the outer diameter of the stepped thread is formed on the outer peripheral surface of the other end, the seating groove formed in the predetermined position on the inner peripheral surface It characterized in that it comprises a hollow connector and a check valve is inserted into the seating groove of the connector.

Connector, Step, Thread, Packing, Check Valve

Description

CONNECTOR FOR Flowing backward prevention}

1 is an exploded perspective view of an embodiment of a non-return connector according to the present invention

Figure 2 is a front view of the combined state of the backflow prevention connector and the water meter according to the present invention

3 is a partially enlarged cross-sectional view of a check valve opened when water is supplied through the inlet pipe of FIG.

4 is a cross-sectional view of the closed check valve of FIG.

<Short description of drawing symbols>

10 Backflow prevention device 100 connectors

110 step 120 thread

130 Mounting recess 130a

200 Check Valve 210 First Casing

211 Large Diameter 212 Small Diameter

213 Elastic member 214 Hanger groove

215 O-ring 220 Packing

221 groove 230 plunger

231 Head 232 Axis

240 Spring 250 Second casing

251 body part 251a locking projection

252 Connection 253 Through Hole

254 projection 300 water meter

310 outlet pipe 320 packing

330 nuts

The present invention relates to a non-return connector, and more specifically, by installing a check valve inside the connector installed between the outlet pipe of the water meter and the inlet pipe of the water supply pipe, the tap water of the water supply pipe during the maintenance work of the corroded drainage pipe The present invention relates to a backflow preventing connector that prevents backflow and facilitates replacement and installation of a drain pipe and a water meter.

In general, tap water introduced from a water source is distributed to each consumer through a drain pipe, and after passing through a water meter, it is supplied to the consumer through an inlet pipe. At this time, the tap water supplied from the drain pipe is flowed in a pressurized state by the operation of the water level difference or the pressure pump.

These drains are replaced periodically to prevent contamination of the tap water due to corrosion. Therefore, when the drainage pipe is replaced, the operation of the pressurized pump is stopped, so the water pressure in the drainage pipe or inlet pipe drops to the atmospheric pressure level. This will pollute the drain pipes used by the air.

In order to prevent the drainage pipe from being contaminated by the reverse flow of tap water, a technical configuration is disclosed to prevent a backflow by installing a check valve on an inner circumferential surface of an outlet pipe or an inner circumferential surface of an intake pipe of a water meter.

However, when the check valve is installed on the inner circumferential surface of the outlet pipe of the water meter or the inner circumferential surface of the water inlet pipe as described above, there is a need to install the check valve by separately processing the inner circumferential surface of the water meter and the inlet pipe.

In addition, in case of replacement due to a defective check valve installed on the inner circumferential surface of the inlet pipe, only the check valve installed on the inner circumferential surface of the inlet pipe can be removed and replaced, but in some cases, the entire inlet pipe must be replaced by a check valve that is not separated. do. In this case, there is a problem that the maintenance work is delayed and the cost increases.

In addition, the present invention is to solve the conventional problems as described above, provided with a separate connector to facilitate replacement and installation between the outlet pipe of the existing water meter and the water supply pipe of the water supply pipe and a check valve inside the connector The purpose of the present invention is to provide a backflow prevention connector that is easy to check and repair the corroded drainage pipe and the water meter and is easy to install.

The reverse flow prevention connector according to the present invention is a stepped groove formed at one end, and formed in the other end direction of the stepped integrally and smaller than the outer diameter of the stepped thread is formed on the outer peripheral surface of the other end, the seating groove formed in the predetermined position on the inner peripheral surface It includes a hollow connector and a check valve inserted into the seating groove of the connector.

In addition, the check valve of the present invention is formed on a large diameter portion, a small diameter portion formed integrally with one end of the large diameter portion, an O-ring provided on the outer circumferential surface of the small diameter portion, and the outer circumferential surface of the other end of the large diameter portion, A first casing through which a plurality of elastic members, a center including a hook groove formed at a predetermined position on the inner circumferential surface of the large diameter portion, and a groove are formed to be inserted into the inner circumferential surface on the other end of the large diameter portion of the first casing And, one end is seated in the groove of the packing and the body portion is formed through the center formed with the engaging projection to be fixed to the hook groove of the first casing, extending in the axial center direction from the body portion so that the fluid can pass through A connecting portion having a portion of the cross section formed therethrough, and extending vertically from a central portion of the connecting portion, and having a through hole formed in the center thereof in a longitudinal direction; A second casing including a protrusion, a shaft inserted into the through hole of the protrusion formed in the connecting part and sliding, a head portion extending to one side of the shaft and having an outer circumferential surface in close contact with an inner circumferential surface of the small diameter portion of the first casing; It includes a plunger, and a spring installed between the projection of the connecting portion and the head of the plunger.

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

1 is an exploded perspective view of an embodiment of a backflow preventing connector according to the present invention, Figure 2 is a front view of the combined state of the backflow preventing connector and the water meter according to the present invention.

The backflow prevention device 10 according to an embodiment of the present invention includes a connector 100 and a check valve 200 inserted into the other end of the connector 100.

One end of the connector 100 is in close contact with the outlet pipe 310 of the water meter 300 and the other end is fixedly installed with the inlet pipe. That is, the center is penetrated, one end is closely contacted with the outlet pipe 310 of the water meter 300, and then stepped with an outer diameter portion to be fixed to the inside of the nut 330 to be fixed using the nut 330 110 and the thread 120 is formed at the other end of the small diameter portion so as to be integrally formed in the other end direction of the step 110 and smaller than the outer diameter of the step and fixed to the inner circumferential surface of the water inlet pipe.

In addition, the engaging portion 130a is formed so that the seating groove 130 having a predetermined depth is formed on the inner circumferential surface of the other end on which the thread 120 is formed, and the check valve 200 corresponding to the inner circumferential surface on which the seating groove 130 is formed is fixedly installed. ) Is formed.

Therefore, the nut 330 is inserted into the other end of the connector 100 to couple with the outlet pipe 310 of the water meter 300. At this time, the stepped portion 110 of the connector 100 is caught on the inner circumferential surface of the nut 330 and the nut 330 is brought into close contact with one end of the stepped portion 110 of the connector 100 to prevent leakage. Insert into the inner circumference of the

Then, the connector 100, the packing 330, and the outlet tube 310 are disposed on the same line, and the nut 330 is rotated in the threaded direction formed on the outer circumferential surface of the outlet tube 310 to tighten the inner peripheral surface of the nut 330. While tightly coupled with the thread formed by pressing the packing 320 is tightly coupled.

On the other hand, the check valve 200 is installed in the mounting groove 130 formed on the other end of the connector 100 to prevent the reverse flow.

The check valve 200 includes a first casing 210, a second casing 250, a packing 220 fixed to one end of the second casing 250 and coupled to an inner circumferential surface of the first casing 210. It is installed inside the pair of casing (210,250) and includes a plunger 230 which is operated by the spring 240 to supply water in one direction and prevent backflow.

The first casing 210 has a large diameter portion 211 through which the center penetrates and is slightly smaller than the outer diameter of the inner circumferential surface of the mounting groove 130 of the connector 100, and a small diameter portion integrally formed at one end of the large diameter portion 211 ( 212, a plurality of elastic members 213 formed at equal intervals at the center of the other end of the large diameter portion 211, and a hook groove 214 formed on the inner circumferential surface of the other end of the large diameter portion 211.

On the outer circumferential surface of the small diameter portion 212, the O-ring 215 is installed such that the check valve 200 inserted into the seating groove 130 of the connector 100 is in close contact with each other without leakage.

The second casing 250 includes a body portion 251 coupled to the first casing 210, a connection portion 252 integrally extending to the body portion 251, and a through hole in the center of the connection portion 252. 253 includes a protrusion 254 formed thereon.

The body portion 251 has a center penetrated therein and the groove 221 of the packing 220 is seated at one end of the body portion 251 to be inserted into the other end inner circumferential surface of the large diameter portion 211 of the first casing 210. It is installed so as to, the outer peripheral surface of the body portion 251 is formed with a locking projection (251a) for fixing to the hook groove 214 of the first casing (210).

In addition, the connection portion 252 is formed to extend in the axial center direction in the body portion 251 and a portion of the cross section is passed through the water supply pipe. The connection part 252 has a through hole 253 formed at the center thereof, and a protrusion 254 is formed in the inner longitudinal direction of the second casing 250 at the center where the through hole 253 is formed.

The plunger 230 includes a shaft 232 inserted into the through hole 253 formed in the protrusion 254 of the connecting portion 252 and a head 231 integrally formed on one side of the shaft 232.

The shaft 232 is slid by water pressure supplied in a state of being inserted into the through hole 253 formed in the protrusion 254 of the connecting portion 252. The head portion 231 is smaller than the inner circumferential surface of the large diameter portion 211 of the first casing 210 and larger than the inner circumferential surface of the small diameter portion 212. To block the inner circumferential surface of the small diameter portion 212 so as not to flow back to the drain pipe. Therefore, the head portion 231 preferably has a plurality of shapes, but preferably has a conical shape in which a portion of the head portion 231 is fitted into the inner circumferential surface of the small diameter portion.

The spring 240 actuates the plunger 230, one end of which is inserted into the protrusion 254, and the other end of which is inserted into the shaft 232 of the plunger 230 to be in contact with the head 231. .

3 is a partially enlarged cross-sectional view of a check valve in an open state when water is supplied through the water inlet pipe of FIG. 2, and FIG. 4 is a cross-sectional view of the check valve in FIG. 3 in a closed state.

Since the tap water supplied to the outlet pipe 310 of the water meter 300 is pressurized by the pressure pump, the water pressure presses the head 231 of the plunger 230 of the check valve 200. The head portion 231 of the plunger 230 overcomes the tension of the spring 240 and closes in the inlet pipe direction by the pressure of the pressurized water, so that the passage between the first casing 210 and the second casing 250 is opened. Tap water is supplied.

When the water is supplied as described above, the check valve 200 is always maintained in an open state, and the outlet pipe 310 and the connector 100 of the water meter 300 in order to replace the water meter 300 and the drain pipe. When the nut 330 coupled to one end of the water is released, the pressure supplied to the water meter 300 drops to the atmospheric pressure level. At this time, since the hydraulic pressure is not applied to the head portion 231 of the plunger 230, the elastic force of the spring 240 is restored so that the head portion 231 does not flow back to the inner circumferential surface of the small diameter portion 212 of the first casing 210. Close contact After replacing the water meter 300 and the old drain pipe, the connector 100 of the backflow prevention device 10 and the outlet pipe 310 of the water meter 300 may be assembled in the reverse order.

According to the present invention, a check valve is installed inside the connector that is easy to install in the outlet pipe of the water meter and the inlet pipe of the water supply pipe to prevent the tap water of the water supply pipe from flowing back during the maintenance work of the drain pipe, and It is easy to replace the water meter.

In addition, since it can be installed in the water pipe of the existing water meter and water supply pipe without any additional processing, working time is shortened.

An embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (2)

A hollow connector including a stepped end formed at one end, and a mounting groove formed integrally in the other end direction of the stepped and smaller than an outer diameter of the stepped and formed with a thread on an outer circumferential surface of the other end, and a locking part formed at a predetermined position on an inner circumferential surface thereof; And a check valve inserted into the seating groove of the connector. The method of claim 1, The check valve, A large diameter portion, a small diameter portion integrally formed at one end of the large diameter portion, an O-ring provided on an outer circumferential surface of the small diameter portion, a plurality of elastic members formed on the other end outer circumferential surface of the large diameter portion and seated on the engaging portion of the connector, and the large diameter A first casing through which a center including a hook groove formed at a predetermined position on the other end inner circumferential surface of the negative portion passes; A packing inserted into the other end inner circumferential surface of the large diameter portion of the first casing and having a groove formed along the other outer circumferential surface; One end is seated in the groove of the packing and the body portion is formed through the center formed with the engaging projection to be fixed to the hook groove of the first casing, and extends in the axial center direction from the body portion to allow the fluid to pass through A second casing including a connecting portion having a cross section and a protrusion formed to extend vertically at the center of the connecting portion and having a through-hole bruise in the center thereof in a longitudinal direction thereof; A plunger including a shaft inserted into the through-hole of the protrusion formed in the connecting part and sliding, a head portion extending to one side of the shaft and having an outer circumferential surface in close contact with an inner circumferential surface of the small diameter portion of the first casing; And a spring installed between the protrusion of the connection part and the head of the plunger.

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