JPS5894536A - Apparatus for preventing freezing city water pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to a water pipe antifreeze device.

Various types of antifreeze devices have been proposed to prevent water pipes from being damaged by freezing, but most of them use thermovalve, which is installed at an appropriate position on the water pipe, and a thermosensor inside the thermopulp is used. When the outside temperature reaches a preset freezing danger temperature due to contraction of the water pipe, the previously closed valve is opened and the water inside the water pipe is allowed to flow through this valve, allowing the water in the underground part of the water pipe that has not yet reached the freezing temperature to flow. Introduced into areas at risk of freezing to avoid freezing].

It was something that I was trying to do. However, in the conventional system using this thermovalve, it is not possible to prevent water pipes from freezing in all parts from underground pipes to water supply terminal equipment trenches, and the range in which freezing can be prevented is limited. There were drawbacks. That is, when the thermo-valve 3 is attached to the upper end of the outdoor exposed part 2 of the water pipe 1 as shown in FIG. Between the thermo valve 3 and the thermo valve 3, relatively warm water flows underground and prevents it from freezing. Because of the build-up, it was not possible to run the risk of freezing.Furthermore, when the thermo valve 3 was installed indoors as shown in Figure 1(b), the temperature from the thermo valve 3 to the faucet 5 was The underground part 4 is a safe area, but since the thermopulp 3 senses the temperature inside the room, the outdoor exposed part 2 has a lower temperature.
could not avoid the risk of freezing. Furthermore, as shown in FIG. 1(c), when thermo valves 3, 3 are provided at the upper end of the outdoor exposed part 2 and on the indoor side, respectively, the thermo pulp 3
The outdoor exposed area and the indoor area were safe areas, but the exposed area from the outdoor area where the thermopulp 3 was installed to the indoor area was at risk of freezing.

As described above, in conventional anti-freeze faucets, depending on the mounting position, it is inevitable that parts at risk of freezing remain, which is a major problem.

As a result of research conducted in view of the above-mentioned problems regarding the freezing prevention of water pipes, the present inventor decided to develop an anti-freezing device that can prevent all parts of water pipes from freezing, regardless of whether they are exposed outdoors or indoors. This was successful and is hereby proposed as the present invention.

The configuration of the present invention will be explained below based on the embodiments shown in the drawings. FIG. 2 is a sectional view of the first embodiment of the present invention, and is an outdoor exposed Y! At the upper end of tfS2 is a three-way joint pipe 6.
is attached, and an indoor introduction pipe 7 that guides water indoors is connected to this joint pipe 6. A faucet 5, which is a water supply terminal device, is attached to the indoor side of this indoor introduction pipe.

On the other hand, thermopulp 3 is placed in one opening of the joint pipe 6.
A head case 8 is attached. thermopulp 3
3. In other words, 9 in the figure is a temperature sensing case that houses the wax temperature sensing element 10, and the end of the body case 11 is screwed onto the outer periphery of the leg of the head case 8. It is composed υ
, the wax thermosensor 10 is pressed against the leg end surface of the head case 8 by a coil spring 13 interposed between a part of the corner of the other end of the body case 11 and the collar 12. A drain port 14 is provided on the other end surface of the 1° body case 11 that holds the water pipe 10 in the temperature-sensitive case 9 to drain the tap water in the water pipe 1 to the outside. On the other hand, a neck portion 15 is provided at the center of the end surface of the head case 8 and projects outward, and a water inlet hole 16 is opened in the neck portion 15 to allow tap water in the water pipe 1 to flow into the temperature-sensitive case 9. It is designed to guide you. 17 is a piston that expands and contracts in the axial direction inside the temperature sensing case 9 in accordance with the expansion and contraction of the wax temperature sensing element 10, the axis of which coincides with the axis of the water inlet hole 16, and the tip of the pulp 18 that is placed over the head of the piston 170. Water inlet hole 1 opened in the head case 8
When seated on the open end 19 of 6, the water inlet hole 16 is reliably closed.

Further, 20 indicates the inner bottom corner of the head case 8 and the valve 18.
A coil spring is inserted between the piston 1 and the flange of the piston 1.
Even when the piston 7 expands or contracts, the valve 18 is always in close contact with the tip of the piston 17 and moves accordingly. One end of a water intake pipe 21 is attached to the neck 15 of this thermopulp 3, and this water intake pipe 21 is extended inside the indoor introduction pipe 7 toward the faucet 5, which is a water supply terminal device. That is, the water intake port 22 is located in the upstream pipe line 25 directly below the pulp 23 of the faucet 5. Therefore, the tap water introduced into the thermopulp 3 is introduced from within the pipe line 25 on the upstream side of the faucet 5. The position of this water intake port 22 determines the range of movement of water to prevent freezing, and it is preferable to install it as close to the end of the pipe on the upstream side of the machine as possible, where tap water will not accumulate. .

In this embodiment, a faucet has been described as a water supply terminal device, but it goes without saying that it can also be used for terminal devices such as a water boiler, a mixing faucet, and a water supply valve device for a toilet. In these cases as well, the water intake 122 may be located within the upstream pipe as in the case of the faucet. In addition, the thermopulp 3 is of the same type as the conventionally used faucet 5.
The water pipe 1 discharges the required amount of water by operating the handle 24 of the faucet 5, and when the valve 23 of the faucet 5 is closed, the outside air temperature drops and reaches a preset freezing danger temperature. In this case, the wax thermosensor 10 of the thermopulp 3 contracts and the piston 17 attached to it shrinks.
is drawn in the direction of the wax thermosensor 10, and following this, the tip of the pulp 18 moves away from the open end of the water inlet hole 16, and the water in the water intake valve 21 is introduced into the thermosensor case 9 and drained through the metal inside the case. It is discharged to the outside from the outlet 14. In this case, as shown by the arrow, the relatively warm underground tap water, which is higher than the freezing danger temperature, circulates to the water intake 22, so water flows throughout the water pipe 1, and all If the water temperature is above the freezing point, freezing will be prevented. On the other hand, when the wax temperature sensing element 10 is warmed by the passage of this relatively warm water, it begins to expand, the piston 1T extends, and the tip of the valve 23 closes the water inlet hole 16, stopping the flow of water. In this way, the thermovalve 3 intermittently closes and closes the valve by sensing the outside air temperature, and continuously introduces warm underground water into the water pipes to flow, bringing all the water in the pipes above the freezing danger temperature. Since the water intake port 22 of the water intake pipe 21 to the thermovalve 3 extends directly below the valve 23 of the faucet 5, which is the water supply terminal equipment, water is distributed evenly to all parts. Flow occurs, and the water temperature does not drop locally, making it possible to completely prevent freezing.

Next, FIG. 3 is a cross-sectional view of the second embodiment of the present invention, and
Similar to the embodiment, the water pipe 1 is introduced indoors through the wall surface from the upper end of the outdoor exposed part 2 rising above the ground from the underground part 4 of the water pipe 1 through a bent part, and a water supply terminal is installed at the tip of the water pipe 1. A faucet 5, which is a device, is provided. A small-diameter water intake hole 2 is provided in the pipe wall 26 of the upstream pipe line 26 directly below the valve of the faucet 5.
The water intake hole 2T and the water inlet hole 16 of the thermovalve 3 are communicated with each other through a water intake pipe 21. This thermovalve 3 is fixed at a suitable position on the outdoor side independently of the water pipe 1. Note that the fixed position of the thermovalve 3 can be arbitrarily selected from a location where the outside temperature can be easily detected. The other parts are the same as those in the first embodiment, are given the same reference numerals, and the explanation will be omitted. Similar to the first embodiment, in this second embodiment, when the outside air temperature decreases to below a preset temperature, the thermovalve 3 is activated and the tap water in the underground section flows as shown by the arrow to prevent freezing. In this case, the position of the thermovalve 3 can be freely selected and it can be positioned at a place where the temperature is most likely to drop.

Next, FIG. 4 is a sectional view of a third embodiment of the present invention, in which a thermovalve 3 is fixed at an appropriate position on the outdoor side independently of the water pipe 1, as in the second embodiment, and the thermovalve 3 is fixed independently of the water pipe 1. The water intake pipe 21 attached to the water inlet hole 16 of the valve 3 is inserted into the indoor introduction pipe T from the upper end of the outdoor exposed portion 2, and its tip, the water intake port 22, is near the end face of the upstream pipe line 25 of the faucet 5. It is located in In the figure, 28 is a backing for keeping the charging portion of the water intake pipe 21 watertight. This embodiment has the advantage that, unlike the second embodiment, there is no need to modify water supply terminal equipment such as faucets.

As mentioned above, in the anti-freezing device of the present invention, the range of water flow is large, there is no part where water accumulates, and a single thermo-valve is used to control the water supply in all parts from the outdoor exposed part to the indoor water supply terminal equipment. It has an excellent effect of preventing pipes from freezing. Furthermore, since only one thermovalve is used, failures caused by this can be reduced, and this has the excellent effect of increasing reliability and reducing costs.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the freezing-hazardous parts of a conventional antifreeze device, FIG. 2 is a sectional explanatory diagram of the first embodiment of the present invention, FIG. 3 is a sectional explanatory diagram of the second embodiment, and FIG. The figure is a cross-sectional explanatory diagram of the third embodiment. 1... Water pipe, 2... Outdoor exposed part, 3... Thermo valve, 4... Underground part, 5... Faucet part, 6...
・Joint pipe, 7...Indoor introduction pipe, 8...Head case,
9... Temperature sensitive case, 10... Wax thermosensitive body, 11
...Body case, 12...Brim part, 13...Coil spring, 14...Exhaust port, 15...Neck part, 16...Water inlet hole, 17...Piston, 18...Pulp, 19...・Opening end, 20... Coil spring, 21... Water intake pipe,
22...Water intake, 23...Valve, 24...Handle, 25...Pipe line, 26...Pipe wall, 27...Water intake hole agent Shigeru Fujiyoshi Procedural Amendments 1982 July 2D, Commissioner of the Japan Patent Office 1 Indication of the case Patent Application No. 190784 of 1982 2 Title of the invention Water pipe anti-freezing device 3 Relationship with the case of the person making the amendment Patent applicant, 1 agent address Tokyo 1-11-7-6 Toranomon, Miyakominato-ku Claims of the specification to be amended, detailed description of the invention, figure "Surface 7, contents of the amendment (1)" Submit the complete amended specification as shown in the attached sheet. (2) Delete Figure 2, correct Figure 3 as Figure 2, and Figure 4 as Figure 3, as shown in the unallocated text.Correction of the entire text Description 1, Name of invention Freezing of water pipes Preventing device 2, Claims Water inlet provided on the end face of the temperature-sensitive case for pulp that moves in the axial direction within the temperature-sensitive case in accordance with the temperature sensed by the wax temperature-sensitive body housed in the temperature-sensitive case. One end of the water intake pipe is attached to the water inlet hole of the thermopulp that opens and closes the hole to control the inflow of water into the temperature-sensitive case, and the other end opening of the water intake pipe is connected to the upstream pipe of the water supply terminal equipment. 3. Detailed Description of the Invention The present invention relates to an antifreeze device for water pipes. Various antifreeze devices have conventionally been used to prevent water pipes from being damaged by freezing. Although many proposals have been made, most of them use thermopulp.The thermopulp is attached to an appropriate position on the water pipe, and the outside temperature or water temperature is set in advance by the contraction of the thermosensor inside the thermolube. When the temperature reaches the temperature, the previously blocked pulp is opened and the water in the water pipes flows through it, allowing water from underground water pipes that have not yet reached freezing temperature to be introduced into areas at risk of freezing to avoid freezing. However, conventional systems using this thermopulp cannot prevent water pipes from freezing in all parts from underground pipes to water supply terminal equipment; There was a drawback that the range was limited. That is, when the thermopulp 3 is seen at the upper end of the outdoor exposed part 2 of the water pipe 1 as shown in Fig. 1 (a), the water pipe 1 may be buried underground. Between the part 4 and the part where this thermopulp 3 is installed (the shaded part in the figure), relatively warm water underground is flowed by the action of this thermopulp 3 and freezing is prevented, but this thermopulp 3 This warm water does not flow from the installation position to the faucet 5, which is a water supply terminal device on the indoor side, and the water accumulates, making it impossible to avoid the risk of freezing. In addition, when the thermovalve 3 is installed on the indoor side as shown in Fig. 1(b), the part from the thermopulp 3 to the faucet 5 and the underground part 4 become safe areas, but the thermopulp 3 is installed on the indoor side. Since the temperature is detected, the outdoor exposed part 2, which has a relatively low temperature, cannot avoid the risk of freezing. Furthermore, as shown in FIG. 1(C), thermopulp 3,
3, the outdoor exposed part up to the thermopulp 3 and the indoor side are safe areas, but the exposed part from the outdoor thermovalve 3 installation position to the indoor room was at risk of freezing. As described above, in conventional anti-freeze faucets, depending on the mounting position, it is inevitable that parts at risk of freezing remain, which is a major problem. The inventor of the present invention has conducted research in view of the above-mentioned problems regarding the freezing prevention of water pipes, and has found that it is possible to prevent all parts of water pipes from freezing, regardless of whether they are exposed outdoors or indoors, and can quickly respond to temperature changes. We have successfully developed an anti-freeze device and hereby propose it as the present invention. The configuration of the present invention will be explained below based on the embodiments shown in the drawings. FIG. 2 is a sectional view of the first embodiment of the present invention, in which the water pipe 1 penetrates the wall surface from the upper end of the outdoor exposed part 2 rising above the ground from the underground part 4 of the water pipe 1 through a bent part. It is connected to an indoor introduction pipe 7 and introduced indoors, and a faucet 5, which is a water supply terminal device, is provided at its tip. A small-diameter water intake hole 27 is bored in the pipe wall 26 of the upstream pipe line 25 directly below the valve of the faucet 5.
It is communicated with. The thermopulp 3 has the following configuration. That is, 9 in the figure is a temperature-sensitive case that houses the wax temperature-sensitive body 10, and is constructed by screwing the end of the body case 11 onto the outer periphery of the leg part of the head case 8. 12
is pressed against the end face of the leg part of the head case 8 by a coil spring 13 interposed between a part of the corner of the other end of the body case 11 and the collar part 12 to hold the wax thermosensitive element 10 in the temperature-sensitive case 9. ing. Further, a drain port 14 is provided on the other end surface of the body case 11 in order to discharge the tap water in the water pipe 1 to the outside. On the other hand, a neck 15 protruding outward is provided at the center of the end surface of the head case 8 , and a water inlet hole 16 is opened in the neck 15 to allow tap water in the water pipe 1 to flow into the temperature-sensitive case 9 . It is designed to guide you. 1T is a piston that expands and contracts in the axial direction inside the thermosensing case 9 in response to the expansion and contraction of the wax thermosensor 10; When the distal end of the valve 18 opens into the head case 8 and sits on the open end 19 of the water inlet hole 16, the water inlet hole 16 is reliably closed. Inner bottom corner and valve 18
A coil spring is inserted between the collar and the collar. Even if the piston 17 expands or contracts, the valve 18 is always in the position of the piston 1.
It is designed to move in close contact with the tip of number 7 and follow it. This thermopulp 3 is fixed at an appropriate position on the outdoor side independently of the water pipe 1.・The fixed position of this thermopulp 3 can be arbitrarily selected from a place where it is easy to sense the outside temperature. In this embodiment, a faucet has been described as a water supply terminal device, but it goes without saying that it can also be used for terminal devices such as a water boiler, a mixing faucet, and a water supply valve device for a toilet. In these cases as well, the water intake hole 27 may be provided in the pipe wall of the upstream pipe as in the case of the faucet. The thermopulp 3 is of the same type as that conventionally used. This first embodiment has an inclined configuration, and the required amount of water in the water pipe 1 is discharged by operating the handle 24 of the faucet 5.
3 is closed, when the outside air temperature decreases and reaches a preset freezing danger temperature, the wax thermosensor 10 of the thermopulp 3 contracts and the piston 17 attached to it contracts. Following this, the tip of the valve 18 moves away from the opening end of the water inlet hole 16, and the water in the water intake pipe 21 is introduced into the temperature-sensitive case 9, passes through the case, and is discharged to the outside from the outlet 14. be done. In this case, as shown by the arrow, the relatively warm underground tap water, which is higher than the freezing danger temperature, flows to the water intake hole 27, so water flows throughout the water pipe 1, and all If the water temperature is above the freezing point, freezing will be prevented. on the other hand,
When the wax temperature sensing element 10 is warmed by the passage of this relatively warm water, it begins to expand, the piston 17 extends, and the tip of the pulp 23 closes the water inlet hole 16, stopping the flow of water. In this way, Thermopulp 3 intermittently closes the valve by sensing the outside temperature, constantly introduces and flows the warm underground water into the water pipe, and brings all the water in the water pipe above the freezing danger temperature. It holds and prevents freezing.
Since the water intake hole 27 of the water intake pipe 21 to the thermopulp 3 is provided in the pipe wall directly below the pulp 23 of the faucet 5, which is a water supply terminal device, water flows evenly in all parts, and some Freezing can be completely prevented without causing a drop in water temperature. 'Also, the thermopulp 3 can be installed independently of the water pipe 1 or the faucet 5, and can be installed at any location such as the area near the ground where the temperature drops the most. It is not installed in the road and is exposed to the outside air, and is ``opened by air detection.'' Since the valve closes by sensing water temperature, it can respond quickly to temperature changes and has good response characteristics. Next, FIG. 3 is a sectional view of a second embodiment of the present invention, in which the thermopulp 3 is fixed at an appropriate position on the outdoor side independently of the water pipe 1, as in the first embodiment, and the thermopulp 3 is also pulp 30
The water intake pipe 21 attached to the water inlet hole 16 is inserted into the indoor introduction pipe 7 from the upper end of the outdoor exposed portion 2, and the water intake port 22, which is the tip thereof, is located near the end face of the upstream pipe line 25 of the faucet 5. ing. In the figure, 28 is a backing for retaining water in the charging portion of the water intake pipe 21. The other parts are the same as those in the first embodiment, so the same reference numerals are given and the explanation will be omitted. In this second embodiment, when the thermopulp 3 opens, the tap water on the upstream side of the faucet 5 flows into the thermopulp 3 through the water intake port 22 of the water intake pipe 21, and then flows into the thermopulp 3 through its discharge port 14.
As in the case of the first embodiment, the valve is opened by sensing the outside temperature and closed by sensing the water temperature. The second embodiment has the advantage that, unlike the first embodiment, there is no need to modify water supply terminal equipment such as faucets. As mentioned above, in the anti-freeze device of the present invention, the range of water flow is large, there is no part where water accumulates, and a single piece of thermopulp is used to control the water supply in all parts from the outdoor exposed part to the indoor water supply terminal equipment. It has an excellent effect of preventing pipes from freezing. In addition, since only one thermopulp is used, failures caused by this can be reduced, and this has the excellent effect of increasing reliability and reducing costs. Furthermore, since the thermopulp is installed independently of water pipes, faucets, etc., the installation location of the thermopulp can be freely selected, and the freezing danger temperature can be sensed more accurately. In addition, thermopulp is exposed to the outside air and opens by sensing the air and closes by sensing the water temperature, so it can quickly react to temperature changes and completely prevent freezing. It has excellent effects. 4. Brief description of the drawings Fig. 1 is an explanatory diagram showing the freezing-hazardous parts of a conventional antifreeze device, Fig. 2 is a cross-sectional explanatory diagram of the first embodiment of the present invention, and Fig. 3 is a second embodiment. FIG. 1...Water pipe, 2...Outdoor exposed part, 3...Thermometer
・Lupu, 4... Underground part, 5... Faucet part, I.
... Indoor introduction pipe, 8... Head case, 9... Temperature sensing case, 10... Wax temperature sensing element, 11... Trunk case, 12... Collar, 13... Coil spring , 14...
・Outlet, 15... Neck, 16... Water inlet, 17.
...Piston, 18...Pulp, 19...Open end,
20... Coil spring, 21... Water intake pipe, 22.
...water intake, 23...pulp, 24...hafdol,
25...Pipeline, 26...Pipe wall, 27...Water intake hole Patent applicant Shimizu Yasushiro, patent attorney Shigeru Fujiyoshi

Claims (1)

[Claims] A valve that moves in the axial direction inside the thermosensing case opens and closes the water inlet hole provided on the end face of the thermosensing case in accordance with the temperature sensed by the wax thermosensor housed in the thermosensing case. One end of the water intake pipe is attached to the water inlet hole of the thermopulp that controls the inflow of water into the water intake pipe. A water pipe antifreeze device characterized by being able to take in water.