KR102697803B1 - Anti-freezing burst device of water pipe - Google Patents

Abstract

The present invention relates to a water pipe freeze prevention device, and the opening/closing member of the device comprises: a lifting valve mounted at the lower end of the opening/closing rod to prevent tap water from flowing out to the outside from the outlet when raised/lowered; a step formed in the housing communicating with the water pipe; and when the lower surface of the lifting valve is spaced from the step, tap water is transferred to the water pipe, and when the lifting valve is in close contact with the step, the tap water is blocked from being transferred to the water pipe.
With this configuration, if the lifting valve wears out over a long period of use, causing a leak of tap water, the lifting valve can be easily replaced by pulling out the opening/closing rod without having to dig up the ground.

Description

{ANTI-FREEZING BURST DEVICE OF WATER PIPE} Easy to replace and repair

The present invention relates to a water pipe freeze prevention device, and more particularly, to a water pipe freeze prevention device that can easily be repaired by replacing parts even when a failure occurs in an underground floating reservoir.

In general, an antifreeze device that connects a water pipe and a water pipe that supplies tap water is a device that supplies tap water to the water pipe when the lifting valve installed in a tubular housing is opened, and stops the water supply when the lifting valve is closed, and automatically drains any water remaining inside the pipe into the ground through the drain hole, thereby preventing the freezing of the tap water and water pipe in the winter.

The “antifreeze structure for freeze prevention (Patent Document 2: Patent Publication No. 10-1145007)” according to the prior art is illustrated in FIGS. 8 to 10.

As shown in the drawing, the antifreeze structure for freezing prevention has a housing (110) as the center and an opening/closing rod (120), a support (130), and a watertight body (140) inside. A drain hole (112) is formed on the side of the housing (100) to discharge water remaining inside the water pipe (200) to the outside.

By forming a mounting protrusion (113) having an inner protrusion inside the housing (110), the support (130) and the watertight body (140) are later mounted on the mounting protrusion (113) and pressed and fixed to the water pipe (200).

And inside the housing (110), a switch (120) is positioned, and the switch (120) forms an inlet (121) having a slope so that the lower end thereof spreads outward as it faces downward, and the inlet (121) is configured such that the upper end with a small diameter is inserted into the support (130) to maintain the support (130) in a circular shape, and when moving upward, the lower end of the inlet (121) with a large diameter spreads the support (130) outward to contact the inner surface of the housing (110).

As shown in Fig. 9, when the water pipe (200) is locked, the opening/closing rod (120) is maintained in a state of moving downwards so that the opening/closing port (123) blocks the supply hole (111) and prevents the water supply, and the inlet (121) is also positioned below the support (130) so that a space is secured between the support (130) and the water seal (140) that maintain a circular shape and the drain hole (112), so that the remaining tap water inside the water pipe (200) and the housing (110) is naturally discharged to the outside through the drain hole (112), thereby preventing the water pipe (200) and the housing (110) from freezing.

As shown in Fig. 10, when the water pipe (200) is opened, the opening/closing rod (120) moves upward, the opening/closing rod (123) opens the supply hole (111), and water is supplied into the housing (110). At the same time, the cut portion (132) of the support (130) opens outward along the inclined outer surface of the inlet (121) moving upward together with the opening/closing rod (120), and the watertight body (140) on the outer side of the support (130) also opens outward together with the cut portion (132), and each watertight protrusion (142) comes into close contact with the inner surface of the housing (110), so that the watertight body (140) maintains a state in which the drain hole (112) is blocked, and the water supplied into the housing (110) is supplied to the water pipe (200) through the inlet hole (122).

Patent Document 1: Patent Publication No. 10-0270843 (announced on November 1, 2000) "Field-based water meter protection box with freeze prevention" Patent Document 2: Patent Publication No. 10-1145007 (announced on May 11, 2012) “Antifreezing Structure for Freezing Prevention” Patent Document 3: Utility Model Registration No. 20-0327072 (Publicly Announced on September 19, 2003) “Frozen Water Supply Column for Antifreeze” Patent Document 4: Patent Publication No. 10-1282303 (published on July 10, 2013) “Antifreeze for water supply that is easy to replace and repair” Patent Document 5: Patent Publication No. 10-1806977 (published on December 11, 2017) “Built-in electricity” Patent Document 6: Patent Publication No. 10-1257323 (announced on April 29, 2013) “Antifreeze for water supply” Patent Document 7: Patent Publication No. 10-2393706 (announced on May 3, 2022) "Anti-freezing device with a drain valve capable of preventing damage and leakage" Patent Document 8: Patent Publication No. 10-1194158 (announced on October 17, 2012) “Antifreeze for water supply”

As described above, the antifreeze (100) of the “antifreeze structure for freeze prevention (Patent Document 2: Patent Publication No. 10-1145007)” according to the prior art is buried in the ground.

The conventional floating body (100) is configured such that the support body (130) and the watertight body (140) are fixed by being placed on the fixing jaw (113) and pressed into the water pipe (200).

Therefore, in the event of a breakdown in the above-mentioned floating device (100), there is a problem in that the above-mentioned floating device (100) buried underground must be taken out and repaired.

And as shown in Fig. 9, when the water pipe (200) is opened, the opening/closing rod (120) moves upward, and the cut portion (132) of the support (130) opens outward along the inclined outer surface of the inlet (121), and the watertight body (140) on the outer side of the support (130) also opens outward together with the cut portion (132), and each watertight projection (142) comes into close contact with the inner surface of the housing (110), so that the watertight body (140) maintains a state in which the drain hole (112) is blocked, and tap water supplied into the housing (110) is supplied to the water pipe (200) through the inlet hole (122).

That is, since the inclined outer surface of the inlet body (121) must be pushed in order to move the opening/closing rod (120) upward, there is a problem that durability is reduced and breakdowns occur frequently, and also that the user experiences inconvenience in raising the opening/closing rod (120).

Accordingly, the present invention has been created to solve the problems described above, and an object of the present invention is to provide a water pipe freeze prevention device that has increased durability, allows the user to easily operate the opening/closing handle when raising and lowering the opening/closing handle, and allows repair work to be performed without digging the ground even when a failure occurs in the pipe before freezing.

The above object is achieved by the present invention, and according to one aspect of the present invention, a water pipe freeze prevention device is provided, comprising: a water pipe; a water faucet connected to the upper portion of the water pipe; an opening/closing handle for raising/lowering an opening/closing rod installed inside the water pipe; and an antifreeze device mounted at the lower end of the water pipe for opening and closing the movement of tap water to the water pipe, wherein the antifreeze device comprises: a housing having a lower end communicated with the water pipe and an upper end communicated with the water pipe; an outlet formed in the housing for discharging tap water contained in the water pipe to the outside; And it is composed of an opening/closing member mounted inside the housing to control tap water being conveyed to the faucet by the elevation of the opening/closing rod, so that when the tap water being conveyed to the faucet is blocked by the operation of the opening/closing member, tap water contained in the water pipe flows out to the outside through the outlet, and the opening/closing member is mounted at the lower end of the opening/closing rod to prevent tap water from flowing out to the outside through the outlet when it is elevated; The method comprises: forming a step in the housing that is connected to the water pipe; When the lower surface of the lifting valve is spaced from the step, tap water is transferred to the water pipe; When the lifting valve is in close contact with the step, the tap water is blocked from being transferred to the water pipe; A sunken cylindrical pinhole is formed on an outer surface located at the upper portion of the opening/closing rod; A connecting portion is formed at the lower portion of the opening/closing handle, into which an upper portion of the opening/closing rod in which the cylindrical pinhole is formed is inserted; A spring pin is mounted on the connecting portion, so that the cylindrical surface of the spring pin is seated in the cylindrical pinhole, so that the opening/closing rod is moved up and down by the rotation of the opening/closing handle; The lifting valve is made of a rubber material, and a valve body having a plurality of transfer holes through which tap water is transferred is formed; The valve body is made of a metal material and is embedded in the valve body and is connected to the lower end of the opening/closing rod by a screw thread, and an upper ring and a lower ring in the shape of rings are formed on the outer surface of the valve body, and a fin ring is additionally formed to protrude outwardly from the edge of the upper surface of the valve body, so that the fin ring is in close contact with the inner surface of the housing, and a fastening nut is additionally connected to the opening/closing rod that is connected to the valve connecting portion by a screw, so that the valve connecting portion and the opening/closing rod are compressed and connected, and the lower end of the water pipe is bent outwardly to form an expanded extension piece, and a sealing ring is installed between the expansion piece and the housing, and the sealing ring is in the shape of a ring and has a mounting protrusion formed on which the expansion piece is installed, and a sealing projection that protrudes outwardly is formed on a portion that comes into contact with the housing.

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In the present invention, a compression nut is additionally mounted between the water pipe and the housing, and the outer surface of the compression nut is threaded and connected to the inner surface of the housing to compress the expansion piece and the sealing ring.

In addition, the faucet is characterized by being additionally equipped with a check valve that prevents tap water transported along the water pipe from leaking to the outside and allows outside air to move into the water pipe.

According to the above-described configuration of the present invention, when the lifting valve is worn out due to long-term use, causing a leak of tap water, the lifting valve can be easily replaced by withdrawing the opening/closing rod.

Since the above-mentioned opening/closing rod is not fixed to the opening/closing handle, the lifting valve fixed to the lower end of the opening/closing rod is also raised/lowered without rotating within the housing, thereby reducing friction between the inner surface of the housing and the lifting valve due to rotation. Accordingly, the effect of reducing wear of the valve body made of rubber occurs.

And since the fin ring is in close contact with the housing at the top of the lifting valve, tap water transported to the water pipe is further prevented from flowing out to the outlet pipe.

In addition, a compression nut is mounted between the water pipe and the housing, and the outer surface of the compression nut is configured to be connected to the inner surface of the housing by screw threads, so that the expansion piece and the sealing ring are compressed by the compression nut, thereby creating a more solid combination and preventing leakage of tap water.

In this way, when tap water flows out to the outside through the outlet hole, the level of tap water contained in the sealing member decreases, causing the buoyancy sealing ball to descend, and air from the outside is introduced into the sealing member due to the descending buoyancy sealing ball. As a result of the air introduced in this way, tap water contained in the water pipe is quickly introduced to the outside through the outlet hole, thereby preventing freezing of the water pipe even in winter when the temperature suddenly drops.

Figure 1 is a perspective view of a freeze protection device according to one embodiment of the present invention.
Figure 2 is an exploded perspective view of the freeze protection device shown in Figure 1.
Figure 3 is a drawing for explaining the raising and lowering of the opening/closing rod.
Figure 4 is a drawing for explaining a state in which tap water is transferred to a faucet by an open/close handle.
Figure 5 is a drawing for explaining a state in which the transfer of tap water to the faucet is blocked by the open/close handle.
FIG. 6 is a drawing for explaining a reverse valve according to another embodiment of the present invention.
Figure 7 is a drawing for explaining a lifting valve.
Figure 8 is a perspective view of a floating device according to the prior art.
Fig. 9 is a cross-sectional view for explaining the locked state of the floating element shown in Fig. 8.
Fig. 10 is a cross-sectional view for explaining the open state of the floating valve shown in Fig. 8.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings, and like reference numerals will be used for like parts throughout the drawings.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be interpreted in their usual or dictionary meanings, but should be interpreted in their meanings and concepts that conform to the technical idea of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to explain his own invention in the best way.

FIG. 1 is a perspective view of a water pipe freeze prevention device according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the freeze prevention device illustrated in FIG. 1.

The water pipe freeze prevention device illustrated by the drawing symbol 10 in the drawing is composed of a water pipe (water pipe, 90), a water tap (8) connected to the upper part of the water pipe (90), an opening/closing handle (60) that raises and lowers an opening/closing rod (20) that is installed inside the water pipe (90), and an antifreeze that is installed at the lower end of the water pipe (90) and opens and closes the movement of tap water to the water pipe (90).

The above water pipe (90) is a pipe through which tap water contained in a water pipe buried underground is transported to the water tap (8), and the opening/closing rod (20) is positioned inside the water pipe (90) and is raised/lowered by the opening/closing handle (60).

And the opening/closing rod (20) raised/lowered by the opening/closing handle (60) operates the lifting valve (40) located below to cut off the flow of tap water to the faucet (8).

The above water pipe (90) is wrapped by a protection pipe (2), and an insulating material (99) is filled between the water pipe (90) and the protection pipe (2). As shown in the drawing, the upper and lower parts of the protection pipe (2) are covered with the insulating material (99) by a cap (3).

The lower part of the housing (30) of the above-mentioned floating device is formed with a hollow portion so as to be connected to a water pipe and the upper part is formed with a hollow portion so as to be connected to the water pipe (90). In addition, one or more outlet holes (31) are formed in the housing (30) so that tap water contained in the water pipe (90) can be discharged to the outside.

An opening/closing member is mounted inside the housing (30), and the opening/closing member blocks the tap water being conveyed to the faucet (8) by the lifting/lowering of the opening/closing rod (20). That is, when the tap water being conveyed to the faucet (8) is blocked by the operation of the opening/closing member, the tap water contained in the water pipe (90) flows out to the outside through the outlet (31).

The above opening/closing member is composed of a lifting valve (40) and a step (33) formed in the housing (30).

The above-mentioned lifting valve (40) is mounted at the bottom of the opening/closing rod (20) and is raised/lowered to prevent tap water from flowing out to the outside from the outlet (31).

As shown in FIGS. 4 and 5, the step (33) is formed in the housing (30) that is connected to the water pipe. When the lower surface of the lifting valve (40) is spaced from the step (33), tap water is transferred to the water pipe (90), and when the lifting valve (40) is pressed against the step (33), the transfer of tap water to the water pipe is blocked.

And as shown in Fig. 3, a sunken cylindrical pinhole (21) is formed on the outer surface located at the upper portion of the opening/closing bar (20). And, a connecting hole (63) protruding downward is integrally formed at the lower end of the opening/closing handle (60), and an insertion groove (61) is formed into which the upper portion of the opening/closing bar (20) in which the cylindrical pinhole (21) is formed is inserted.

As shown in the drawing, a pinhole (73) is formed in the connecting port (63), but the pinhole (73) does not face the center of the connecting port (63) but passes through while deviating from the center.

Accordingly, the spring pin (70) is mounted in the pinhole (73) while the upper part of the opening/closing bar (20) in which the circular pinhole (21) is formed is inserted into the insertion groove (61). That is, the circumferential surface of the spring pin (70) is seated in the circular pinhole (21).

In this state, when the opening/closing handle (60) rotates, the opening/closing rod (20) moves up and down.

That is, when the opening/closing handle (60) is rotated, the opening/closing rod (20) is raised and lowered without rotation by the spring pin (70) that is seated in the cylindrical pin hole (21).

At this time, the opening/closing rod (20) is not fixed to the opening/closing handle (60) but is raised/lowered by the raising/lowering of the spring pin (70), so that it is raised/lowered without rotation within the housing (30) by the raising/lowering valve (40) fixed to the lower end of the opening/closing rod (20), so that the friction between the inner surface of the housing (30) and the raising/lowering valve (40) due to rotation is reduced. Accordingly, the effect of reducing wear of the raising/lowering valve (40) made of rubber material occurs.

As shown in FIG. 5 and FIG. 7, the lifting valve (40) is composed of a valve body (41) and a valve fastening member (47).

The above valve body (41) is made of rubber and has a plurality of transfer holes (44) formed through which tap water is transferred. In addition, a ring-shaped upper ring (45) and a lower ring (43) are integrally formed on the outer surface of the valve body (41).

In addition, a fin ring (45) is formed on the edge of the upper surface of the valve body (41) so as to protrude outward, so that the fin ring (45) is configured to be in close contact with the inner surface of the housing (30).

The valve fastening member (47) made of metal is embedded in the center of the valve body (41) and is fastened to the lower end of the opening/closing rod (20) by a screw thread.

And as shown in FIG. 4 and FIG. 5, a fastening nut (80) is fastened to the valve fastening port (47) and the opening/closing rod (20) which are fastened with a screw so that the valve fastening port (47) and the opening/closing rod (20) are fastened in a pressurized manner.

As shown in the drawing, the lower part of the water pipe (90) is bent outward to form an expanded extension piece (91), and a sealing ring (50) is placed between the expanded extension piece (91) and the housing (30).

As shown in Fig. 5, the sealing ring (50) is shaped like a ring and has a mounting protrusion (51) formed on which the expansion piece (91) is mounted, and a sealing projection (53) protruding outward is formed at the portion that comes into contact with the housing (30).

In addition, a compression nut (55) is mounted between the water pipe (90) and the housing (30), and the outer surface of the compression nut (55) is fastened to the inner surface of the housing (30) by screw threads.

Accordingly, the expansion piece (91) and the sealing ring (50) are compressed by the compression nut (55), so that they are more firmly combined, thereby creating the effect of preventing leakage of tap water.

The operation of the water pipe freeze prevention device (10) according to the above configuration is explained with reference to FIGS. 4 and 5.

First, the state in which tap water is transported from the water pipe through the water pipe (90) to the water tap (8) is explained with reference to Fig. 4.

When the user rotates the opening/closing handle (60), the connecting hole (63) formed at the bottom of the opening/closing handle (60) also rotates and rises.

As the connecting member (63) rotates and rises in this way, the spring pin (70) seated in the pinhole (73) also rises while rotating along the cylindrical pinhole (21), so the opening/closing rod (20) also rises.

As shown in Fig. 4, when the opening/closing rod (20) rises, the lifting valve (40) also rises and becomes spaced from the step (33) of the housing (30).

In this way, when the lifting valve (40) rises and separates from the step (33), the tap water in the water pipe is transferred to the water pipe (90) through the space between the steps (33) and the transfer hole (44) of the lifting valve (40).

At this time, the upper ring (42) formed on the raised lifting valve (40) is positioned above the outlet (31), and the lower ring (43) is positioned on the lower surface of the outlet (31) to come into close contact with the inner surface of the housing (30), thereby preventing tap water from flowing out through the outlet (31).

In addition, since the fin ring (45) is in close contact with the housing (30) at the upper part of the lifting valve (40), tap water transported to the water pipe (90) is further prevented from flowing out through the outlet (31).

As shown in Fig. 5, when a user stops using tap water in the winter and lowers the open/close handle (60) to prevent freezing, the lifting/lowering valve (40) also lowers and comes into contact with the step (33), thereby blocking the transfer of tap water to the transfer hole (44).

And since the upper ring (45) of the lowered lifting valve (40) is located below the outlet (31), the tap water contained in the water pipe (90) naturally flows out to the outside through the outlet (31).

Therefore, it is possible to prevent the water pipe (90) from freezing due to a drop in temperature in winter.

In addition, when the lifting valve (40) is worn out due to long-term use and causes a leak of tap water, the lifting valve (40) can be easily replaced by pulling out the opening/closing rod (20).

Another embodiment of the present invention is illustrated in FIG. 6.

The above faucet (8) is additionally equipped with a check valve (81) that prevents the tap water transported along the water pipe (90) from leaking to the outside and allows the outside air to move into the water pipe (90).

The above-mentioned check valve (81) is connected to the inside of the faucet (8) and is composed of a connecting pipe (85) and an intake pipe (84) that is connected to the connecting pipe (85) and has an opening formed to allow external air to be sucked in.

And as shown in the drawing, a sealing member (87) and a support member (89) are formed in the internal space of the intake pipe (84), and a buoyancy sealing ball (83) is installed in the space between the sealing member (87) and the support member (89).

The above buoyancy sealing ball (83) receives buoyancy from the tap water, so that as shown in FIG. 4, when the opening/closing rod (20) rises, the lifting valve (40) also rises and is separated from the step (33) of the housing (30), and the tap water in the water pipe is transferred to the water pipe (90) through the space between the step (33) and the transfer hole (44) of the lifting valve (40).

In this way, tap water transferred to the faucet (8) is transferred to the inside of the intake pipe (84) via the connecting pipe (85), and the buoyancy sealing ball (83) moves upward due to buoyancy by the tap water flowing into the intake pipe (84) and comes into close contact with the sealing port (87).

The above buoyancy sealing ball (83) is pressed more tightly against the sealing port (87) by water pressure, thereby preventing tap water from leaking out of the intake pipe (84).

And, as shown in Fig. 5, in order to prevent freezing in the winter, when the opening/closing handle (60) is operated to lower the opening/closing rod (20), the lifting/lowering valve (40) also lowers, thereby blocking the transfer of tap water to the transfer hole (44).

And since the upper ring (45) of the lowered lifting valve (40) is located below the outlet (31), the tap water contained in the water pipe (90) naturally flows out to the outside through the outlet (31).

In this way, when tap water flows out to the outside through the outlet hole (31), the water level of tap water contained in the sealing port (87) decreases, causing the buoyancy sealing ball (83) to descend, and air from the outside is introduced into the sealing port (87) by the descending buoyancy sealing ball (83). Due to the air introduced in this way, tap water contained in the water pipe (90) is quickly introduced to the outside through the outlet hole (31).

The descending buoyancy sealing ball (83) is supported by the support member (89), and the support member (89) may be formed in a tripod shape or a net shape through which tap water and air can freely pass.

In addition, the above-mentioned reverse valve (81) is not limited to the configuration shown in Fig. 6, and any valve having a configuration that prevents tap water from leaking out and allows outside air to be sucked in can be used.

The above is only one embodiment for implementing the water pipe freeze prevention device that is easy to replace and repair according to the present invention, and the present invention is not limited to the above embodiment, and as claimed in the following claims, it will be understood that the technical idea of the present invention encompasses a range in which various modifications can be implemented by anyone having ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention.

10: Anti-freeze device, 20: Opening/closing bar,
21: Circular pinhole, 30: Housing,
31: leak hole, 33: step,
40: Lifting valve, 41: Valve body,
42: upper ring, 43: lower ring,
45: Fin ring, 47: Valve fastener,
50: Sealing ring, 51: Fixing jaw,
53: Sealing lug. 55: Compression nut,
60: Opening/closing handle, 61: Insertion groove,
63: connector, 70: spring pin,
73: pinhole, 80: fastening nut,
81: Reverse valve, 83: Buoyancy sealing ball,
87: Sealed area, 89: Support area,
90: Water pipe (water pipe) 91: Expansion

Claims (10)

A water pipe freeze prevention device comprising: a water pipe; a faucet connected to the upper part of the water pipe; an opening/closing handle for raising/lowering an opening/closing rod installed inside the water pipe; and an antifreeze device mounted on the lower part of the water pipe for opening/closing the movement of tap water to the water pipe.
The above-mentioned floating device comprises a housing having a lower end connected to a water pipe and an upper end connected to the water pipe; an outlet formed in the housing through which tap water contained in the water pipe is discharged to the outside; and an opening/closing member mounted inside the housing to control tap water being conveyed to the water faucet by the elevation of the opening/closing rod, so that when tap water being conveyed to the water faucet is blocked by the operation of the opening/closing member, tap water contained in the water pipe is discharged to the outside through the outlet.
The above-mentioned opening/closing member is composed of a lifting valve mounted at the lower end of the opening/closing rod and raised to prevent tap water from flowing out from the outlet to the outside; a step formed in the housing that is connected to the water pipe; and when the lower surface of the lifting valve is separated from the step, tap water is transferred to the water pipe, and when the lifting valve is in close contact with the step, the tap water is blocked from being transferred to the water pipe.
A sunken cylindrical pinhole is formed on the outer surface located at the upper portion of the opening/closing rod, and a connecting hole is formed at the lower portion of the opening/closing handle, into which the upper portion of the opening/closing rod with the cylindrical pinhole formed is inserted, and a spring pin is mounted in the connecting hole, so that the cylindrical surface of the spring pin is seated in the cylindrical pinhole, and the opening/closing rod is raised and lowered by the rotation of the opening/closing handle.
The above-mentioned lifting valve is made of a rubber material and has a valve body formed with a plurality of conveying holes through which tap water is conveyed; and a valve connecting member made of a metal material and embedded in the valve body and connected to the lower end of the opening/closing rod by a screw thread.
An upper ring and a lower ring in the shape of a ring are formed on the outer surface of the valve body.
A fin ring is additionally formed to protrude outside the edge of the upper surface of the valve body, so that the fin ring is in close contact with the inner surface of the housing.
A fastening nut is additionally fastened to the above valve connection port and the above opening/closing rod which are fastened with a screw, so that the above valve connection port and the above opening/closing rod are compressed and fastened.
A water pipe freeze prevention device characterized in that the lower part of the water pipe is bent outward to form an expanded extension piece, a sealing ring is installed between the expansion piece and the housing, the sealing ring is shaped like a ring and has a mounting protrusion formed on which the expansion piece is installed, and a sealing projection protruding outward is formed at a portion in contact with the housing. delete delete delete delete delete delete delete A water pipe freeze prevention device, characterized in that in the first paragraph, a compression nut is additionally mounted between the water pipe and the housing, and the outer surface of the compression nut is threadedly connected to the inner surface of the housing to compress the expansion piece and the sealing ring. A water pipe freeze prevention device, characterized in that in the first paragraph, the water faucet is additionally equipped with a check valve that prevents tap water transported along the water pipe from leaking to the outside and allows outside air to move into the water pipe.

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