KR20040090886A - Safety plug for freeze damage protection - Google Patents

Abstract

PURPOSE: A safety plug for freeze-protection is provided to prevent freeze by easily operating the safety plug by cubical expansion pressure as liquid is frozen in a pipe such as a heat-exchanging coil, to cut off the loss generated by leaking the water in the pipe, and to use semi-permanently. CONSTITUTION: A safety plug(1) for freeze-protection is composed of a cylinder unit(14) disposed at the side of a plug body(10) to form a discharge passage(16) and to receive an opening/closing valve(20) and a valve fixing member(30); a fixing groove(15) formed along the inner peripheral surface adjacent to the end of the cylinder unit to fasten the valve fixing member; a combining unit(11) disposed at the other side of the plug body to form a press-fit passage(13) and a valve seat(12); a compression spring(25) for opening and closing the opening/closing valve; and the valve fixing member for fastening the opening and closing valve in an operation region in the cylinder unit.

Description

Safety plug for freeze protection {SAFETY PLUG FOR FREEZE DAMAGE PROTECTION}

The present invention relates to a freeze protection safety plug, and more particularly, the safety plug is provided on one side of the plug body and forms a discharge passage, and includes a cylindrical portion for receiving the opening / closing valve and the valve fixing member, and an inner circumferential surface adjacent to the cylindrical end portion. It is formed along the fixing groove for fixing the valve fixing member, the coupling portion provided on the other side of the plug body and forming the press-in passage and the valve seat, and the coupling pipe branched and screwed from the pipe such as heat exchange coil and the like; A compression spring for opening / closing the valve while being lifted by the inflation pressure, a freeze protection safety block that constitutes a valve fixing member for fixing the opening / closing valve to the operating region in the cylinder portion, and a close contact provided adjacent to the discharge passage of the plug body. Inserted between the surface and the end face of the coupling pipe, it is hermetically mounted by screwing the coupling part and expanded and ruptured by freezing expansion pressure. It relates to a frost-proof safety plugs, characterized in that constituting a rupture member.

Heating and cooling using water as a heat exchange medium are widely used in air conditioning and air conditioning facilities, refrigeration and freezing facilities, and industrial facilities. In particular, water-cooled condensers, waste heat-cooled heat exchangers, evaporators for absorption chillers, heat exchange coils for air-conditioning air conditioners, evaporative cooling towers, and icing vessels for ice heat storage systems are exposed to freezing accidents due to exposure to sub-zero atmospheric temperatures or neglect of management. It has potential.

In winter, freezing accidents of water meters and water pipes are common, and are usually caused by defects in thermal insulation and direct exposure to sub-zero ambient temperatures. Freezing is caused not only by loss of water resources, but also damage to buildings caused by water leakage and freezing. It causes huge damage and inconvenience, such as repairing the facility.

Water flowing in a closed pipeline never freezes in the flow state, but when it is exposed to freezing temperature while the flow is stopped, the water freezes and changes from liquid to solid and the volume expansion (about 10%) pressure of the ice crystal If it is not accepted by the device, it will eventually lead to freezing, and the destructive power of the freezing is beyond imagination.

As a general countermeasure to prevent freezing, there are methods such as thermal insulation, heat trapping, heating, heat mixing, brine mixing as an antifreeze in the fluid, and drainage for continuous flow of water in the pipe. These methods require separate heating energy and equipment and involve problems such as water loss.

In addition, as a conventional simple freeze protection accessory, it is known to mount a bursting plate between a flange that communicates with the pipe and a freeze protection protective cap which is formed integrally with the break of the thin plate on the top and screwed to the pipe. The freeze protection cap prevents freezing of the pipe by transferring the expansion pressure through the bursting part when the volume expands due to freezing and expands the expansion pressure through the bursting part. . And the rupture plate type freeze protection is the same as the freeze protection cap, but it is more economic than the freeze protection cap by replacing only the ruptured rupture disc.The freeze protection parts are freezes when the ice in the frozen pipe thaws. Leakage may cause water loss, flooding and damage to nearby facilities.

Therefore, an object of the present invention is to provide a semi-permanent freeze protection safety block that can block the leakage of water by automatically opening and closing the opening and closing valve while moving up and down by the inflation pressure to transfer the inflation pressure to the outside automatically.

It is another object of the present invention to have a hemispherical stretched portion that expands according to the freezing volume expansion in the tube and is restored to its original state when the pressure is reduced, and economical freeze safety for preventing freezing by rupturing the stretched portion during excessive freezing volume expansion. To provide a floc.

Still another object of the present invention is to configure the on-off valve and the valve fixing member outside the pipeline not directly in contact with water or ice to prevent side effects due to corrosion and freezing, and freeze-proof safety having a simple structure for inspection and disassembly. To provide a floc.

And it is an object of the present invention to provide a freeze protection safety plug having means for making the bursting of the bursting member easy by freezing expansion pressure.

It is another object of the present invention to provide a freeze protection safety plug having a means for blocking water leaking to the outside through a discharge passage or guiding it to a designated location to prevent a problem caused by water leakage.

<Code Description of Main Parts of Drawing>

1 is a schematic side cross-sectional view of a safety block for freezing protection according to a first embodiment of the present invention;

2 is a schematic plan view of the main part of FIG.

3 is a schematic plan view of another main part of FIG.

4 is a schematic side cross-sectional view of a freeze protection safety plug according to a second embodiment of the present invention;

5 is a schematic side cross-sectional view of a freeze protection safety plug according to a third embodiment of the present invention;

6 is a schematic side cross-sectional view of a freeze protection safety plug according to a fourth embodiment of the present invention;

7 is a schematic plan view of the main part of FIG. 6;

8 is a schematic side cross-sectional view of a freeze protection safety plug according to a fifth embodiment of the present invention;

9 is a schematic partial cutaway view of a freeze protection safety plug according to a fifth embodiment of the present invention.

<Code Description of Main Parts of Drawing>

1, 1a, 1b, 1c, 1d: Safety Flock 10, 10a, 10b, 10c, 10d: Flock Body

11, 11a, 11b, 11c, 11d: coupling portion 12: valve seat

13: press-fit passage 14: cylindrical portion

15: fixing groove 16: discharge passage

17: insertion groove 18: fixing protrusion

19: close contact surface 20: on-off valve

21: valve body 22: opening and closing part

23: guide protrusion 24: spindle cylinder

25: compression spring 30: valve fixing member

31 head 32 fixed jaw

35: spindle 37: tool groove

42: locking bolt 44: band compression groove

45 groove coupling groove 50 the first burst member

51: airtight 52

53: incision groove 55: second rupture member

60: coupling pipe 65: coupling socket

70: discharge container

In order to achieve the above object, the present invention, the safety plug; A cylindrical portion provided at one side of the plug body of the safety block and forming a discharge passage and accommodating an on-off valve and a valve fixing member; A fixing groove formed along an inner circumferential surface adjacent to the end of the cylindrical portion and fixing the valve fixing member; A coupling part provided on the other side of the plug body and forming a press-fit passage and a valve seat; A coupling tube branched from a tube such as a heat exchange coil and screwed with the coupling portion; A compression spring that opens and closes the valve while being elevated by an expansion pressure; Freeze-proof safety plug constituting the valve fixing member for fixing the on-off valve to the operating region in the cylindrical portion, and the close contact surface provided adjacent to the discharge passage of the plug body and the front end surface of the coupling pipe to tighten the screw It is airtightly mounted by the freezing member to provide a freeze-proof safety block, characterized in that it comprises a bursting member that expands and ruptures by freezing expansion pressure.

Here, the safety plug is provided on one side of the plug body to form a discharge passage and the opening and closing valve and the valve fixing member, and the other side is provided on the other side to form a press-fit passage and the valve seat, the coupling portion for coupling the coupling pipe As an integral cylindrical shape, the cylindrical portion is formed along the outer circumferential surface, the band pressing groove for fixing the discharge hose for guiding discharge, the insertion groove formed in the front end surface for inserting the valve fixing member, and the lower portion of the insertion groove A fixing groove formed along an inner circumferential surface to fix the valve fixing member, a fixing protrusion formed in the fixing groove to prevent the flow of the valve fixing member, and provided in the fixing groove below the insertion groove to prevent the valve fixing member from being separated. It is desirable to provide a locking bolt.

The valve fixing member preferably comprises a head in which a tool groove is formed, at least one fixing jaw formed along an outer circumferential surface of the head, and a round rod-shaped spindle formed in vertical communication with the head.

In addition, the opening and closing valve, the opening and closing portion is formed on one side and the cylindrical valve body for providing a spindle cylinder for accommodating the spindle on the other side, and integrally formed along the outer peripheral surface of the valve body, the center of the valve body and lift It includes a plurality of guide projections for guiding, and one end is in close contact with the bottom surface of the fixing jaw to accommodate the spindle of the valve fixing member and the other end to receive a portion of the valve body is fixed to the upper surface of the guide projections desirable.

The bursting member may include a hemispherical expandable portion extending into the coupling tube and expanding the expansion region, a cutout groove radially formed at the center of the stretchable portion and guiding the rupture path, and integrally formed with the stretchable portion. It is preferable to include the airtight part which becomes.

In addition, the bursting member may have a disc shape and provide a cutout groove that guides the bursting path radially from the center of the bursting member.

Here, the bursting member may be made of synthetic rubber such as silicone rubber having compressive resistance and low temperature elasticity and pressure resistance of freezing expansion and thawing shrinkage restoring force, or nonmetallic material having expansion and restoring force.

In addition, the safety plug, as a means for blocking the water leaking to the outside through the discharge passage, may further include a discharge container mounted on the discharge passage.

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

Prior to the description, in the various embodiments, components having the same configuration will be representatively described in one embodiment by applying the same reference numerals, and in other embodiments, only the configuration different from the embodiment will be described.

1 is a schematic side cross-sectional view of a freeze protection safety plug according to a first embodiment of the present invention, FIG. 2 is a schematic plan view of a main part of FIG. 1, and FIG. 3 is a schematic plan view of another main part of FIG. 1. to be. As shown in these figures, the safety plug 1 is provided on one side of the plug body 10 to form a discharge passage 16, and a cylindrical portion for receiving the opening and closing valve 20 and the valve fixing member 30 ( 14) and a cylindrical portion 14 having a cylindrical shape integrating the coupling portion 11 provided on the other side and provided with a female thread for forming the press-fit passage 13 and the valve seat 12 and coupling the coupling pipe 60. Is formed along the outer circumferential surface and the band pressing groove 44 for fixing the discharge hose (not shown), the inlet groove 17 is formed on the front end surface to insert the valve fixing member 30, and the insertion groove 17 A fixing groove 15 formed along the inner circumferential surface of the lower portion of the fixing groove 15 to fix the valve fixing member 30, and formed in the fixing groove 15 to prevent the flow of the valve fixing member 30; A locking bolt 42 is provided in the fixing groove 15 below the insertion groove 17 and prevents the valve fixing member 30 from being separated.

The valve fixing member 30 includes a head 31 in which a tool groove 37 is formed, one or more fixing jaws 32 integrally formed along the outer circumferential surface of the head 31, and the head 31. An annular rod-shaped spindle 35 formed in vertical communication is provided.

In addition, the opening and closing valve 20 has a cylindrical shape composed of a spindle cylinder (24) for accommodating the opening and closing portion 22 made of a close contact surface of the same angle as the valve seat 12 on one side and the spindle 35 on the other side. The valve body 21 of the valve body is formed integrally along the outer circumferential surface of the valve body, a plurality of guide protrusions 23 for guiding the centering and lifting of the valve body 21, and one end of the valve fixing member 30 The compression spring 25 is fixed to the upper surface of the guide projection 23 by receiving a spindle 35 of the close contact with the bottom surface of the fixing jaw 32 and the other end receives a portion of the valve body 21. .

By such a configuration, the water in the sealed tube such as a heat exchange coil (not shown) freezes and the pressure in the tube gradually increases due to volume expansion, and the pressure increase exceeds the compressive stress limit of the compression spring 25. When the on-off valve 20 is opened, the pressure or fluid pressurized through the press-in passage 13 is transmitted to the outside through the discharge passage 16, thereby reducing the pressure in the pipe to prevent freezing. Subsequently, when the pressure in the pipe is reduced, the on-off valve 20 automatically closes the press-fit passage 13 to prevent the water in the pipe from leaking.

Figure 4 is a schematic side cross-sectional view of a freeze protection safety block according to a second embodiment of the present invention. As shown, unlike the first embodiment described above, the safety plug 1a is provided with a coupling portion 11a having a male screw.

As a result, the safety plug 1a can be easily coupled to a fitting such as a socket 65 having a female thread.

Figure 5 is a schematic side cross-sectional view of a freeze protection safety plug according to a third embodiment of the present invention. As shown, unlike the above-described embodiment, the safety plug 1b has a coupling portion 11b having an end portion which is easily welded.

In addition, by using a coupling hole (not shown) and a rubber groove (RUBBER GROOVE) of the coupling portion 11b formed to penetrate through the pipe surface on which the safety plug 1b is installed, the coupling portion 11b is coupled to be press-fitted. A groove engaging groove 45 is further provided along the outer circumferential surface at the upper portion adjacent to the end of the portion 11b.

As a result, the safety plug 1b can be easily welded or grooved to the pipe.

6 is a schematic side cross-sectional view of a freeze protection safety plug according to a fourth embodiment of the present invention, and FIG. 7 is a schematic plan view of an essential part of FIG. 6. As shown, unlike the above-described embodiment, the safety plug 1c is provided with a close contact surface 19 that can maintain airtightness on the bottom surface adjacent to the discharge passage 16 of the coupling portion 11c.

The first bursting member 50 extends and is accommodated in the coupling tube 60 and is formed in the hemispherical expansion and contraction portion 52 extending the expansion area, and radially formed at the center of the expansion and contraction portion 52 to guide the bursting path. An almost '+' shaped cutout 53 and an airtight portion 51 formed integrally with the expansion and contraction portion 52 to be a gasket are provided.

Therefore, the first bursting member 50 is inserted between the contact surface 19 of the coupling portion 11c and the front end surface of the coupling tube 60 and is hermetically coupled by screwing the coupling portion 11c.

By such a configuration, the water in the sealed tube such as a heat exchange coil (not shown) advances as freezing, and the pressure in the tube is gradually increased due to volume expansion. As the pressure increases, the expansion and contraction portion 52 also expands to increase the expansion pressure. The accommodated stretched portion 52 has a reverse hemispherical shape, and if the freezing expansion is within the expansion acceptance range of the stretched portion 52, the stretched portion 52 does not rupture, and if the pressure in the pipe is reduced by thawing, the stretched portion ( 52) is restored by self stress. On the other hand, when excessive freezing expansion exceeds the expansion accommodating range of the expansion and contraction portion 52 is made, the expansion and contraction portion 52 is effectively ruptured along the incision groove 53 formed in the expansion and contraction portion 52, the press-in passage 13 Pressure or fluid pressurized through is delivered to the outside through the burst opening and the discharge passage 16 to reduce the pressure in the pipe to prevent freezing. Subsequently, when the ruptured first bursting member 50 is replaced, the freezing prevention standby state is achieved.

8 is a schematic side cross-sectional view of a freeze protection safety plug according to a fifth embodiment of the present invention. Unlike the above-described embodiment, as shown, the safety plug 1d has a disc-shaped second rupture member between the contact surface 19 of the coupling portion 11d and the distal end surface of the coupling tube 60. 55).

The second bursting member 55 forms an almost '+' shaped cutout 53 for guiding the bursting path from the center to the radial direction.

Therefore, the second bursting member 55 is inserted between the first gasket 47 installed on the contact surface 19 of the coupling part 11d and the second gasket 48 installed on the front end surface of the coupling pipe 60. And it is hermetically engaged by screwing of the engaging portion 11d.

By such a configuration, the water in the sealed tube such as a heat exchange coil (not shown) proceeds with freezing, and the pressure in the tube is gradually increased due to volume expansion, and the pressure increase leads to the bursting pressure of the second bursting member 55. When the rupture is efficiently ruptured along the incision groove 53, the pressure or fluid pressurized through the indentation passage 13 is transmitted to the outside through the rupture opening and the discharge passage 16 to reduce the pressure in the pipe to prevent freezing. do. Subsequently, when the ruptured second bursting member 55 is replaced, the frozen state is prevented.

9 is a schematic partial cutaway view of a freeze protection safety plug according to a fifth embodiment of the present invention. As shown, unlike the above-described embodiment, the safety plugs 1c and 1d further include a sealed discharge container 70 having a screwing portion (not shown).

Here, the discharge container 70 is made of a synthetic resin, such as high density polyethylene (HIGH DENSITY POLYETHYLENE) that can see through the inside and has a pressure resistance, the screw coupling portion (not shown) that is screwed with the cylindrical portion 14 on one side Is prepared.

Due to this configuration, when the first bursting member 50 or the second bursting member 55 is ruptured by freezing expansion, the discharge container 70 accommodates the water leaking through the discharge passage. Losses, flooding and damage to adjacent facilities can be prevented.

In addition, since the first bursting member 50 or the second bursting member 55 is frozen at the same time as the bursting or the ice in the pipe is thawed, the water leaking through the burst opening is stored and stored in the discharge container 70. Since it can be visually confirmed by replacing the rupture member and removing the water in the discharge container 70 is a freeze protection standby state.

In the above-described embodiment of the present invention, the coupling portion of the safety plug is a screw coupling type as a representative example, but other coupling methods such as flange coupling are also applied.

In the above-described embodiment of the present invention, the cylindrical portion of the safety plug has been described above to form a band compression groove for coupling the discharge hose for guiding the discharge along the outer circumferential surface, but a coupling screw may be provided.

In addition, in the above-described embodiment of the present invention, the valve fixing member of the safety plug is fixed to the fixing groove formed on the inner circumferential surface of the cylindrical portion, but the screw is formed in the fixing jaw and the cylindrical portion of the valve fixing member to fix the screw. Applicable

In the above-described embodiment of the present invention, the spindle body is configured in the valve body of the safety block, and the spindle is formed in the valve fixing member, but the spindle cylinder and the spindle may be applied.

And in the above-described embodiment of the present invention described above with respect to the sealed discharge container having a screw coupling portion on one side, but the air outlet (AIR VENT) to accommodate the pressure delivered when the bursting member is ruptured to prevent damage to the discharge container It can be applied further including the means.

As described above, according to the present invention, when a liquid freezes in a tube such as a heat exchange coil, the safety plug can be easily operated by the volume expansion pressure to prevent freezing, and loss caused by leakage of water in the tube can be avoided. It can block, provide semi-permanent, easy-to-maintain freeze protection plug.

Claims (6)

In the freeze protection safety plug, A cylindrical portion provided at one side of the plug body and forming a discharge passage and accommodating an on-off valve and a valve fixing member; A fixing groove formed along an inner circumferential surface adjacent to the end of the cylindrical portion and fixing the valve fixing member; A coupling part provided on the other side of the plug body and forming a press-fit passage and a valve seat; A compression spring for opening and closing the on / off valve; And a valve fixing member for fixing the on-off valve to an operating region in the cylindrical portion. In the freeze protection safety plug, A cylindrical portion provided at one side of the plug body and forming a discharge passage; A coupling part provided on the other side of the plug body and forming a close contact surface with the indentation passage; And a rupture member inserted between the tight surface and the front end surface of the coupling pipe to be hermetically coupled. The method of claim 1, The valve fixing member is freeze-proof safety block, characterized in that the screw is fixed to the cylindrical portion. The method of claim 2, The rupture member, hemispherical expansion portion and the airtight safety plug characterized in that it further comprises an airtight portion. The method of claim 2, The rupture member, the freeze-proof safety plug, characterized in that it further comprises a cutting groove for guiding the rupture. The method of claim 2, The discharge passage, the freeze-proof safety block, characterized in that it further comprises a discharge container combined.