KR100444433B1 - Flowing backward prevention connection valve - Google Patents

Abstract

PURPOSE: A connecting valve is provided to prevent the countercurrent of water by combining in a water gauge inside a water gauge protection container. CONSTITUTION: A first countercurrent preventing device(100) prevents the countercurrent of water from a water main by loading in a hollow of a connecting valve body(10). The first countercurrent preventing device has a housing case(110) to be loaded in a hollow of the connecting valve body by comprising a penetrated passage, an inclined portion, a loading portion to load an o-ring for preventing the leakage of water, a space portion to smoothly supply water. A passage switching member(120) is loaded inside the housing case by having an inserting slot, a packing(126) and an isolating portion with an inclined face. A housing cover(130) prevents the separation of the passage switching member by forming a space portion to flow water through plural ribs, an inserting member in the center of the ribs, an elastic member(140) outside the inserting slot and the inserting member and a sill portion and by combining with the housing case. A second countercurrent preventing device has a housing case to freely flow water by forming an opened passage, a penetrated guide slot, a combining portion in the outside of the passage, many ribs lengthwise. A passage switching member is loaded inside the housing case by forming an inclined face, a sealing ring in the inclined face, an isolating member with a loading groove, a guide rod to be protruded from the center of the loading groove and by inserting in the guide slot of the housing case. An elastic member is loaded in the loading groove by inserting the guide rod of the passage switching member. A housing cover prevents the separation of the passage switching member by forming an inserting member to be combined with the housing case, a through-hole having an inclined face and a combining member and inserting in the housing case. A gasket prevents the leakage of water by forming combining grooves to be inserted in the combining members.

Description

Flowing backward prevention connection valve

The present invention relates to a non-return connection valve, and more specifically, a connection valve installed in a water meter protection container having a narrow internal size has a non-return means to be cut by construction of a main water pipe. The present invention relates to a non-return connection valve for preventing water remaining in the pipe from flowing back into the main water pipe.

In general, the tap water supplied from the main water pipe is supplied to a general home or other business, which flows in one direction due to the pressure of the water, but when water is cut off due to reasons such as construction of the water pipe, the tap water is blocked and Due to the blocking of the tap water, the pipe pressure is lowered so that the tap water flows back toward the main water pipe. The backflow does not have a separate device for preventing tap water, and it is not possible to separately provide a check valve to prevent the tap water from flowing back. The space is so narrow that there are many restrictions.

That is, the water meter is built in a protective container having a narrow size of the inner area. Therefore, it is difficult to install a conventional check valve having a relatively large appearance in a narrow protective cylinder, and in order to install the check valve, it is necessary to expand the standardized protective cylinder and to manufacture it separately.

The problem caused by the fact that there is no check valve to prevent backflow is not installed in the pipe supplied through the main water pipe. Thus, when the water tank is installed outside the building or house, the pipe pressure suddenly increases. While changing, there was a problem that the tap water in the pipe backflow into the main water pipe.

In particular, when tap water used in factories, restaurants, and hospitals that handle chemicals or other dangerous substances flows back into the main water pipe, contaminated water containing dangerous substances or various bacteria in the tap water flows back to the main water pipe. There was a problem that polluted the water quality.

The present invention has been made to solve the above problems, and when the tap water flowing through the main water pipe is supplied to the home or other business through the pipe, the tap water is supplied smoothly and at the same time the pipe by the single stage of the main water pipe To prevent the flow of tap water supplied through the main water pipe back to the main water pipe, there is a counter flow prevention connection valve provided with a back flow prevention means for preventing the back water of the tap water in the pipe. It is intended to prevent the backflow of tap water by fastening to one side of the water meter.

1 is an exploded perspective view of a non-return connection valve according to the present invention.

Figure 2 is a cross-sectional view of the coupled state of the non-return connection valve in accordance with the present invention.

Figure 3 is an exploded perspective view showing a first backflow prevention means of the backflow prevention connection valve according to the present invention.

Figure 4 is a cross-sectional view showing a coupling state of the first backflow prevention means of the backflow prevention connection valve according to the present invention.

Figure 5 is a cross-sectional view showing a state in which the connection valve for backflow prevention in accordance with the present invention is mounted in the water meter protective cylinder.

Figure 6a is a cross-sectional view showing an open state of the first reverse flow prevention means of the reverse flow prevention connection valve according to the present invention.

Figure 6b is a cross-sectional view showing a state in which the first reverse flow prevention means of the reverse flow prevention connection valve according to the present invention.

Figure 7 is an exploded perspective view showing a non-return connection valve of another embodiment of the present invention.

Figure 8 is a cross-sectional view showing the coupling state of the non-return connection valve of another embodiment of the present invention.

Figure 9 is an exploded perspective view showing a second backflow prevention means of the backflow prevention connection valve of another embodiment of the present invention.

Figure 10 is a cross-sectional view showing a coupling state of the second backflow prevention means of the backflow prevention connection valve of another embodiment of the present invention.

11A is a cross-sectional view illustrating an open state of a second backflow preventing means of a backflow preventing connecting valve of another embodiment of the present invention;

11B is a cross-sectional view illustrating a state in which a second backflow preventing means of the backflow preventing connecting valve of another embodiment of the present invention is closed;

***** Description of the symbols for the main parts of the drawings *****

10: connecting valve body 12, 26: hollow

20: connector 22: fixture

100,200: first and second backflow prevention means 110,210: housing case

120,220: flow opening and closing port 130,230: housing cover

140,240: elastic member 250: gasket

In order to achieve the above object, the present invention is a connection valve for preventing backflow, in the connection valve is composed of a connecting pipe is installed on one side of the water meter meter, the L-shaped connecting valve body connected to the connecting pipe and the screw connection A second backflow preventing means is provided in an inner space of the connecting pipe, and a first backflow preventing means is provided in an inner space of the connection valve body, wherein the first backflow preventing means forms a flow passage therein. An inclined portion is formed on one inner side of the inner side, and a stepped portion on which an O-ring is seated on the outer side, and a housing case in which a plurality of spaces are formed on the outer side, and a fitting hole is provided on one side, and a blocking portion provided on the other side is formed. A channel opening and closing hole seated inside the housing case and a fitting hole fastened to the fitting hole of the channel opening and closing hole are provided, and the outside of the fitting hole is provided. An elastic member is provided, and a plurality of ribs are formed on the inside, and a stepped portion is formed on the outside, and includes a housing cover fastened to the housing case, wherein the second backflow prevention means has a flow path having one side open inside. And a guide hole penetrated to the other side, a fastening portion is formed on the outer side of the open through-flow passage, and a plurality of ribs are formed in the longitudinal direction at the center outer circumference thereof, and the inclined surface is formed on one side of the housing case in which the space portion is formed. An airtight ring is provided on the inclined surface, and a blocking part having a seating groove formed on the other side is provided, and a guide rod protruding from the seating groove is formed so that the flow path opening and closing hole seated in the housing case and the guide rod of the flow path opening and closing hole are seated in the seating groove. The elastic member and the fitting hole is fastened to the housing case And a through hole having an inclined surface therein, and including a housing cover in which a fastener identical to the housing case is formed, and a gasket in which a fastening groove into which respective fasteners of the housing case and the housing cover are fitted. It is done.

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

1 is an exploded perspective view of a backflow preventing connection valve according to the present invention, FIG. 2 is a cross-sectional view of a coupling state of the backflow preventing connecting valve according to the present invention, and FIG. 3 is a first backflow preventing means of the backflow preventing connecting valve according to the present invention. 4 is a cross-sectional view illustrating a coupled state of the first backflow preventing means of the backflow prevention connecting valve according to the present invention.

As shown in FIGS. 1 to 4, the connection valve for preventing a backflow according to the present invention has a thread 14 formed on one side and a connection valve body 10 provided with a hollow 12 inside.

A first backflow prevention means 100 is provided on the hollow valve 12 of the connection valve body 10 to prevent backflow of tap water introduced from the main water pipe.

A female screw 24 is formed at one side to provide a fastener 22 to be fastened to the thread 14 of the connection valve body 10, a nut 28 is provided at the other side, and a hollow 26 is provided in the inner longitudinal direction. The formed connection pipe 20 is provided.

The first backflow preventing means 100 is formed in the passage 112 penetrated therein, the inclined portion 114 is formed on one side and the seating portion (O) is seated on the outer side to prevent leakage of tap water ( 116 is formed to be stepped and a space portion 118 is formed on the outside to facilitate the supply of tap water is provided with a housing case 110 seated in the hollow 12 of the connection valve body (10).

A fitting hole 124 is provided at one side, and a packing 126 is provided at the other side, and a blocking part 122 having an inclined surface is provided, and a flow path opening and closing hole 120 seated inside the housing case 110 is provided.

A plurality of ribs 134 are formed on the inner side, and a space portion through which tap water flows is formed, and a fitting hole 132 fastened to the fitting hole 124 of the flow opening and closing hole 120 is provided at the center of the rib 134. The elastic member 140 is provided on the outside of the fitting hole 124 and the fitting hole 132 and the stepped portion 136 is formed on the outside to be fastened to the housing case 110 to open and close the flow path opening 120. The housing cover 130 is provided to prevent the departure.

The present invention configured as described above is connected to the water supply pipe (3) which is supplied to the room through the water meter (1) of the water meter as shown in Figure 5 through the inlet pipe (2) of the water meter (1) The tap water supplied through the back is prevented from flowing back toward the meter (1) and the inlet pipe (2).

Figure 6a is a cross-sectional view showing a state in which the first backflow preventing means of the non-return valve connecting valve according to the present invention, the tap water supplied through the pipe connected to the main water pipe (not shown) the first backflow prevention The tap water introduced into the means 100 and introduced into the first backflow prevention means 100 receives the force of the flow opening and closing port 120 of the first backflow prevention means 100 by the pressure of the tap water.

At this time, when the flow opening and closing port 120 receives a force, the elastic member 140 is retracted by being pressed together with the flow opening and closing port 120 by the force, and the elastic member 140 is connected to the flow opening and closing hole 120. Maintained in a pressed state is the flow path 112 of the housing case 110 is opened to facilitate a smooth tap water flow.

Tap water flowing through the flow path 112 is the first backflow prevention means 100 without any catch to the space between the space 118 of the housing case 110 and the rib 134 formed in the housing cover 130. Tap) is smoothly supplied to the water supply pipe (3).

Figure 6b is a cross-sectional view showing a closed state of the first backflow prevention means of the non-return valve in accordance with the present invention, the tap water supplied by the operation as shown in Figure 6a of the former is to be cut in number due to reasons such as construction of the main water pipe In this case, the flow path opening / closing opening 120 which opens the flow path 112 of the first backflow prevention means 100 by the pressure of the tap water returns to its original position by the pressure of the tap water to flow back with the elastic member 140 and the housing case. The flow path 112 of the 110 is blocked.

Accordingly, the tap water supplied toward the water supply pipe 3 is blocked by the return of the flow channel opening and closing 120 to prevent the tap water supplied to the main water pipe from flowing backward.

At this time, the blocking portion 122 provided with the packing 126 in the flow opening and closing opening 120 is in close contact with the inclined portion 114 formed in the flow path 112 of the housing case 110 to maintain the airtight, the remaining tap water This will prevent backflow into the main water line.

Therefore, when the tap water supplied to each home or other business is cut off, the first backflow preventing means 100 prevents the tap water from flowing back through the water supply pipe 3, thereby reducing the water quality due to the inflow of tap water contaminated with the main water pipe. It is possible to prevent the occurrence in advance.

Figure 7 is an exploded perspective view showing a backflow preventing connection valve of another embodiment according to the present invention, Figure 8 is a cross-sectional view showing a coupling state of the backflow preventing connection valve of another embodiment according to the present invention, Figure 9 is another embodiment according to the present invention FIG. 10 is an exploded perspective view illustrating a second backflow preventing means of the backflow preventing connecting valve of the example, and FIG. 10 is a cross-sectional view illustrating a coupling state of the second backflow preventing means of the backflow preventing connecting valve of another embodiment according to the present invention.

7 to 10, the reverse flow prevention valve according to the present invention is provided with a connection thread body 10 is provided with a thread 14 on one side, the hollow 12 is provided on the inside.

A first backflow prevention means 100 is installed on the hollow 12 of the connection valve body 10 and prevents a backflow of tap water introduced through a pipe connected to the main water pipe.

A female screw 24 is formed at one side, and a fastener 22 fastened to the thread 14 of the connection valve body 10 is provided, and a nut 28 is provided at the other side, and a hollow 26 in the longitudinal direction therein. The formed connection pipe 20 is provided.

It is further provided with a second backflow prevention means 200 is seated in the hollow 26 of the connecting pipe 20 to prevent the back flow of tap water introduced from the main water pipe.

The first backflow prevention means 100 has the same structure as in FIG. 3 as described in the former.

The second backflow preventing means 200 has a flow path 218 having one side open therein and a guide hole 216 penetrated at the other side thereof, and a fastening portion (outside) of the flow path 218 which is the open through hole. 212 is formed and a plurality of ribs 214 are formed on the central outer circumferential surface in the longitudinal direction to provide a housing case 210 having a space portion for freeing the flow of tap water.

An inclined surface 224 is formed at one side, and an airtight ring 227 is provided at the inclined surface 224, and a blocking portion 222 having a seating groove 226 formed at the other side is provided, and at the center of the seating groove 226. The guide rod 228 is protruded to be inserted into the guide hole 216 of the housing case 210 is provided with a flow path opening and closing hole 220 which is seated in the housing case 210 to slide.

The guide rod 228 of the flow path opening and closing hole 220 is fitted to the elastic member 240 that is seated in the seating groove 226 is provided.

A fitting hole 231 fastened to the housing case 210 is provided, and a through hole 236 having an inclined surface 234 therein is formed, and the same fastener 232 as that of the housing case 210 is formed. It is fitted to the housing case 210 is provided with a housing cover 230 to prevent the passage of the passage opening and closing 220.

A gasket 250 having a fastening groove 252 in which the fasteners 212 and 232 of the housing case 210 and the housing cover 230 are fitted is provided to prevent the tap water from being leaked to the outside. .

The present invention configured as described above is connected to the water supply pipe (3) which is supplied to the room through the water meter (1) of the water meter through the inlet pipe (2), the tap water supplied through the meter (1) of the water meter again This prevents backflow toward the meter 1 and the water inlet pipe 2.

11A is a cross-sectional view showing an open state of the first and second backflow preventing means of the non-return valve connecting valve according to the present invention, the water supply pipe (2) from the main water pipe (not shown) through the water supply pipe (2) and the meter (1) 3) When the tap water is supplied, the flow path opening and closing port 220 of the second backflow prevention means 200 receives a force by the pressure of the supplied tap water.

At this time, when the flow channel opening and closing hole 220 is subjected to the force, the elastic member 240 is retracted by being pressed together with the flow channel opening and closing hole 220 by the force, and the elastic member 240 and the flow channel opening and closing hole 220 are pressed. Since it maintains the state, the flow path 218 of the housing case 210 is opened to facilitate a smooth tap water flow.

The tap water flowing through the flow path 218 passes smoothly through the second backflow prevention means 200 without being caught by the space portion between the ribs 214 formed on the outer surface of the housing case 210 so that the tap water is smoothly supplied. will be.

The tap water supplied through the second backflow prevention means 200 as described above is seated in the hollow 12 of the connection valve body 10 through the inner hollow 26 of the connecting pipe 20. Tap water introduced into the backflow preventing means 100 and introduced into the first backflow preventing means 100 is the tap water supplied to the water supply pipe 3 by the same method as the second backflow preventing means 200.

That is, the tap water introduced into the first backflow prevention means 100 receives the force of the channel opening and closing port 120 of the first backflow prevention means 100 by the pressure of the tap water.

At this time, when the flow opening and closing port 120 receives a force, the elastic member 140 is retracted by being pressed together with the flow opening and closing port 120 by the force, and the elastic member 140 is connected to the flow opening and closing hole 120. Maintained in a pressed state is the flow path 112 of the housing case 110 is opened to facilitate a smooth tap water flow.

Tap water flowing through the flow path 112 is the first backflow prevention means 100 without any catch to the space between the space 118 of the housing case 110 and the rib 134 formed in the housing cover 130. Tap) is smoothly supplied to the water supply pipe (3).

11B is a cross-sectional view showing a closed state of the first and second backflow prevention means of the backflow prevention connecting valve according to the present invention, and the tap water supplied by the operation as shown in FIG. 11A may be cut in number due to reasons such as construction of the main water pipe. In this case, the flow path opening / closing opening 120, which opens the flow path 112 of the first backflow prevention means 100 by the pressure of the tap water, returns to its original position by the pressure of the tap water to flow back with the elastic member 140, and the housing case. The flow path 112 of the 110 is blocked.

Accordingly, the tap water supplied toward the water supply pipe 3 by blocking the flow path 112 by the return of the flow opening and closing port 120 is prevented from flowing back toward the meter 1 of the water meter.

At this time, the blocking portion 122 provided with the packing 126 in the flow opening and closing opening 120 is in close contact with the inclined portion 114 formed in the flow path 112 of the housing case 110 to maintain airtightness, To prevent backflow.

In addition, the first backflow preventing means 100 blocks the backflow of tap water primarily, and the first backflow preventing means 100 leaks the tap water leaked by the first backflow preventing means 100 and the first backflow preventing means 100. In the same way to block the tap water flowing back, that is, the flow path opening and closing hole 220 that opens the flow path 218 of the second backflow prevention means 200 by the pressure of the tap water by the return force of the elastic member 240 The flow path 218 of the housing case 210 is blocked.

Therefore, the flow path 218 is blocked by the return of the flow path opening and closing 220 to prevent the residual tap water leaked from the first backflow preventing means 100 from flowing back toward the inlet pipe 2.

At this time, the blocking portion 222 provided with the airtight ring 227 in the flow path opening and closing 220 is in close contact with the inclined 234 formed in the flow path 236 of the housing cover 230 to maintain the airtightness, and thus the remaining tap water remains. This prevents backflow into the water inlet pipe 2.

In addition, the backflow preventing means provided in the thermal valve body 10 has the same effect as the former even when the second backflow preventing means 200 is used as a substitute for the first backflow preventing means 100.

Therefore, when the tap water supplied to each home or other business is cut off, the first and second backflow prevention means 100 and 200 prevent the tap water from flowing back through the water supply pipe 3 so that the tap water contaminated with the main water pipe is introduced. It is possible to prevent the deterioration of water quality caused by.

In addition, when the connection pipe to the outlet of the water meter with a nut to prevent the leakage of tap water by inserting an O-ring between the outlet and the connection pipe, the present invention gasket (gasket) Since the role of the O-ring prevents the tap water supplied without leaking the O-ring to the outside.

In addition, the reverse flow prevention means of the present invention is not limited to the water meter, but installed in the connection portion connecting the pipe to prevent the fluid leakage, such as the place where the fluid is introduced, that is, handling the chemicals or handling the oil It is to prevent leakage of fluid and to prevent backflow of liquid.

When tap water used in factories or hospitals handling chemicals or other dangerous substances flows back into the main water pipe, chemicals or other germs are mixed in the tap water and flows back into the main water pipe, contaminating the water quality. In order to prevent the damage, the reverse flow of tap water is blocked for two times, so that the tap water of the main water pipe can be prevented from being contaminated.

Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations can be made to the practice. Therefore, changes in the embodiments of the present invention in the future will not depart from the technical scope of the present invention.

As described above, the present invention can be applied to the water meter protection tank having a conventional narrow inner area by installing in the connection valve connecting the water meter and the water supply pipe.

When the tap water is cut off due to the construction of the main water pipe or other reasons, the tap water supplied to homes and businesses is provided in the connecting valve body and the connecting pipe to block backflow of the tap water to the water meter and the inlet pipe through the water supply pipe. The opening and closing of the flow path is forcibly blocking the flow path, thereby preventing the tap water from flowing back and having the advantage of protecting the water quality.

In addition, tap water used in hospitals or other factories handling chemicals is a single-stage tap water that flows back into the main water pipe by blocking the flow of tap water mixed with various bacteria or chemicals back to the main water pipe due to the change in pipe pressure. It is an invention that can prevent the water quality is contaminated by.

Claims (5)

A connecting valve composed of a connecting pipe installed on one side of the water meter and an L-shaped connecting valve body connected to the connecting pipe by screwing, the second backflow preventing means is provided in the inner space of the connecting pipe. A first backflow preventing means is provided in the inner space of the connection valve body. The first backflow prevention means forms a passage penetrating therein, the inclined portion is formed on one inner side of the passage, and the stepped portion is formed on the outer one side O-ring is seated, and the housing case is formed with a plurality of spaces on the outside; A blocking hole provided with a fitting hole on one side and a packing is formed on the other side, and a channel opening and closing hole seated inside the housing case and a fitting hole fastened to the fitting hole of the channel opening and closing hole are provided, and an elastic member is provided outside the fitting hole. And a plurality of ribs are formed at an inner side, and a stepped portion is formed at an outer side thereof, and includes a housing cover fastened to the housing case. The second backflow prevention means has a flow path that is a through-hole opened on one side and a guide hole penetrated to the other side is formed, a fastening portion is formed on the outside of the open through-hole flow path and a plurality of ribs in a central outer circumferential direction It is formed in the housing case formed with a space and the inclined surface is formed on one side and the sealing ring is provided on the inclined surface and the other side is provided with a blocking portion formed with a seating groove, and a guide rod protruding to the seating groove is formed in the housing case The passage opening and closing opening and the guide rod of the passage opening and closing is inserted into the elastic member seated in the seating groove, and the fitting hole is fastened to the housing case is provided, the through hole having an inclined surface is formed, and the same fastener as the housing case A formed housing cover and the housing case and the housing cover Backflow prevention connection valve, characterized in that it comprises a gasket formed with a fastening groove into which each fastener is fitted. delete delete delete delete