JP3541182B2 - Anti-freezing device for multiple water pipes - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an anti-freezing device for water pipes in a cold region, and more particularly to an anti-freezing device employing a forced drainage method so that piping is not restricted as much as possible in draining buildings such as apartments. .
[0002]
[Prior art]
Conventionally, in cold regions, in order to prevent water pipes from freezing, the valve part operates in the soil by operating an antifreeze hydrant plug buried below the freezing depth, making use of the water in the pipes using the head, In general, a method of natural discharge is generally used. For this reason, it is necessary to make a pipe made of metal and to provide an appropriate gradient (usually about 1/100) in advance.
[0003]
Separately, header pipes have become popular around indoor water and hot water recently from the viewpoints of prevention of pipe corrosion, workability and ease of pipe replacement, reduction of construction costs, and effective use of indoor pipe space. I'm starting to do it.
[0004]
This is done by laying a resin sheath or pipe as a guide in advance in the underfloor slab concrete section, etc., and installing it in a place that is easy to install and maintain, such as around the water heater and pipe shaft water. This is a system in which resin pipes such as cross-linked polyethylene and polybutene are piped to water taps in each room as water pipes and hot water pipes (hereinafter, collectively referred to as flexible pipes) without branching on the way. This is a piping system that is expected to be more widely used in the future, because it has advantages such that the occurrence of water leakage is reduced because joints are not used, and there is little change in water supply and hot water supply when used simultaneously.
[0005]
[Problems to be solved by the invention]
However, the method of dropping water by making the pipe a metal and making a slope, as the number of branch pipes increases, the pipes may be restricted, and in particular, so-called portal pipes with bent parts at the top and bottom In that case, in addition to that, opening the faucet at the end does not allow water to escape and it is necessary to install an intake valve to open the inside of the pipe to the atmosphere, which further restricts the piping, and furthermore, the intake valve There were also concerns about accidents such as malfunctions and water leaks. In order to prevent this, a faucet is installed instead of the intake valve to open and close manually, but the operation becomes complicated, and an incorrect operation sequence may lead to an accident such as water spouting.
[0006]
On the other hand, in the case of the header pipe, it is installed under the floor and is a resin pipe, so that it can be freely piped, but it has an inevitably bent portion, and there is also cross pipe, and water is required as in the case of the branch pipe of the metal pipe described above. It becomes difficult to provide a pipe with a uniform gradient for removal.
[0007]
Furthermore, unlike the conventional case, since the branch does not branch from the piping downstream of the antifreeze water tap but branches from the header, even if the antifreeze water tap is operated and water is to be drained by the head and the siphon action, the drainage does not occur. Starts simultaneously, drainage in the pipe with the shortest horizontal distance from the header to the faucet ends first, and air enters the header and the siphon action is interrupted. In some cases, the water freezes while being partially filled with water, making it impossible to reflow water.
[0008]
In addition, in the case of buildings where an unspecified number of residents are expected to be replaced, such as apartments, it is easier to maintain and manage as much as possible, there is no operation error, and the water in the pipes is drained more reliably than ordinary houses. Equipment was desired.
[0009]
Therefore, in the present invention, it is possible to reliably drain water with a simple operation, and furthermore, it is easy to maintain and manage, and the installation cost is as low as possible. It is an object of the present invention to provide an antifreezing device for a plurality of water pipes of a type in which pressure is generated to forcibly drain water.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the present invention, a plurality of main cocks, an electric switching valve connected downstream thereof, and a drain port of the plurality of electric switching valves connected to a drain port via a drain pipe, and air and water And a control panel, and a plurality of operation panels. When the switches of each operation panel are turned on, the electric suction apparatus is operated via the control panel, and Water is forcibly discharged to the outside.
[0011]
By turning on the main cock and turning on the switch of each operation panel, it is easy to operate the sequence control so as to open the electric switching valve after closing the main cock and to operate the electric suction device after a certain period of time. It is desirable because there is no operation error.
[0012]
If the electric switching valve is provided above the main cock and the operation of the main cock and the electric switching valve are performed simultaneously, and the electric switching valve is opened after the water supply pressure is cut off, the cost can be reduced accordingly and the main cock can be replaced. There is an advantage that it is possible to eliminate operation errors when manual operation is performed.
[0013]
It is desirable from the viewpoint of reliable drainage operation to control the operation of the other electric switching valve before the drainage operation is completed after the switch of the one operation panel is turned on and before the drainage operation is completed.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, taking a case of a header-pipe as an example. FIG. 1 shows a case in which the apparatus schematic diagram of the present invention is applied to two upper and lower apartments. For example, reference numeral 1 denotes an electric suction device of the present invention installed under the floor of a caretaker's room, which is a commercially available dry and wet dust collector for business use. As shown in FIG. 2, a tank 3 supported by the pedestal 2 is provided at a lower portion as shown in FIG. The valve seat 6 is formed. In the figure, the tank is vertically long, but may be horizontally long.
[0015]
A clip 7 is mounted on the lower end, and a ball valve 8 made of resin is seated on the clip 7 to form a negative pressure operating valve 9. The negative pressure actuated valve 9 is not limited to this, but may be of various forms. A suction port 10 is protruded to the side of the tank 3, and a negative pressure generating section (not shown) for generating a negative pressure by, for example, a motor driven rotary blade is provided above the suction port 10 when the water level rises to a certain level. A floating valve (not shown) or the like for closing the suction unit is provided to prevent water from entering. Reference numeral 11 denotes an air discharge port provided above the suction port 10, and reference numeral 12 denotes a water discharge pipe.
[0016]
Reference numeral 13 denotes a motor-operated main valve on the first floor, and 13 'denotes a motor-operated main valve on the second floor. The valve box (not shown) buried below the freezing depth in the ground has an inlet, an outlet, and a drain hole. The inflow port is connected to a suction pipe (not shown), the outflow port is connected to riser pipes 14 and 14 ′, and headers 15 and 15 ′ for water, water heaters 16 and 16 are connected via fittings. , Hot water headers 17, 17 ', and electric switching valves 18, 18' for switching between drained and non-drained states. Flexible pipes 19, 19 ', 20, 20' are connected to respective branch ports of headers 15, 15 ', 17, 17', and drain ports 21, 21 'of electric switching valves 18, 18' are connected to drain pipes 22. To the suction port 10 of the tank 1 via The motor-operated switching valves 18 and 18 'are three-way motor-operated valves that are remotely controlled by electric power, such as motor-driven valves and solenoid valves. In the present invention, motor-driven ball valves are used. However, there is an advantage that the loss is low, the loss resistance is small, and the amount of remaining water is small, but of course, the present invention is not limited thereto.
[0017]
In the normal state, since the electric switching valves 18 and 18 'are closed, hot water does not enter the tank 3, and hot water from the main plugs 13 and 13' and the water heaters 16 and 16 'is supplied to the flexible tubes 19 and 19'. , 20, 20 'to a faucet (not shown) at the end of the kitchen, bathroom, or the like.
[0018]
The control panel 23 includes an electric suction device 1 via a cord 24, main plugs 13 and 13 'via cords 25 and 25', electric switching valves 18 and 18 'via cords 26 and 26', and a cord 27. , 27 'are connected to operation panels 28, 28', respectively. Reference numerals 29 and 29 'are switches, and reference numerals 30 and 30' are lamps that indicate that they have been used earlier.
[0019]
When water is drained due to the possibility of freezing during winter or a long absence, etc., when draining water, as described in the example of the first floor, when the switch 29 of the operation panel 28 is turned on and the faucet (not shown) at the end is opened, the control panel is opened. 23 first puts the main plug 13 in a closed state. Thereafter, the electric switching valve 18 is opened, and the water in the riser pipe 14 and the flexible pipes 19 and 20 is discharged into the ground from the drain hole of the main plug 13 at the same time as the drain port 21 and the drain pipe 22. The water enters the tank 1 through the suction port 10 and is discharged from the drain hole 5 to the water discharge pipe 12.
[0020]
In this state, the hot and cold water in the vertical pipe is discharged smoothly, but the siphon phenomenon is interrupted by the air entering from the shortest pipe faucet, and the horizontal pipe is not provided with an appropriate gradient due to upper and lower refraction parts etc. If the hot and cold water remains and blocks the pipeline and freezes, it will lead to an accident that water will not come out. However, in the present invention, the electric suction device 1 is operated from the above state, and the pressure in the tank 3 is reduced to a negative pressure. The ball valve 8 comes into close contact with the lower valve seat 6 and shuts off the atmosphere from below. At the same time, the hot and cold water in the flexible pipes 19 and 20 is sucked into the suction port 10 through the switching valve 18 and the drain pipe 22. And discharged into the tank 3.
[0021]
The air is sucked in at the same time as the hot water, but the air is discharged from the air discharge port 11 and only the hot water accumulates in the tank 3. The size of the tank 3 may be determined so that the water level is equal to or less than the suction port 10 even if the water is accumulated to the maximum.
[0022]
When the power supply to the electric suction device 1 is cut off after a certain period of time by the action of the timer in the control panel 23, the hot and cold water in the flexible tubes 19 and 20 is mostly stored in the tank 3 and at least the flexible tube It is possible to prevent an accident in which the inside of 19 and 20 is full and freezes, and water does not come out when re-watering. At the same time as the electric suction device 1 stops operating, the ball valve 8 descends and sits on the clip 7, and the water accumulated in the tank 3 is discharged from the drain hole 5 through the negative pressure operation valve 9 to the water discharge pipe 12, The inside of the tank 3 becomes empty again.
[0023]
Since there is an upper limit to the capacity of the electric suction device 1 for suctioning, when the number of the flexible tubes 19 and 20 used is large, for example, first, the water passage of the electric switching valve 18 is opened and the flexible tube is opened. The water in the pipe 19 may be drained, and then the water path may be closed and the hot water path may be opened to discharge the hot water in the flexible pipe 20. After the operation of the electric suction device 1 is stopped, the electric switching valve 18 returns to the closed state.
[0024]
The same applies to ordinary pipes that do not use headers.In the case of pipes where the residual water after draining would normally block the inside of the pipe, a sufficient water passage is required when re-flowing. Is secured. Especially in portal type pipes, when draining water, negative pressure is applied between the rising pipe and the falling pipe, and if air is not introduced into the pipe by installing an intake valve, water will remain and cause freezing. The present invention has an advantage that the intake valve can be omitted.
[0025]
If the electric switching valve 18 is opened without closing the main plug 13, a large amount of water is discharged to the water discharge pipe 12 via the electric suction device 1, and the electric switching valve 18 is opened. At the same time, when the electric suction device 1 is operated, the capacity of the tank 3 must be increased accordingly. Therefore, in the control panel 23, the operation sequence of the main stopper 13, the electric switching valve 18, the electric suction device 1, and the time Is controlled in sequence.
[0026]
In the above embodiment, the main stoppers 13 and 13 'are installed below the floor of the resident on the first floor. However, the main stoppers 13 and 13' can be installed in the vicinity of the electric suction device 1 and the cord is more cordless. 25 and 25 'can be shortened, which is advantageous in maintenance and management. Further, the electric suction device 1 may be of a type including a motor portion and a rotating blade portion, having no tank, and draining directly from the rotating blade portion. However, in this case, since the water comes into contact with the rotating blade portion, it is necessary to take into consideration the freezing of that portion.
[0027]
Although the case where the resident on the first floor drops water has been described above, the same applies to the case of the second floor. However, during the draining operation on either floor, it is difficult to operate on the other floor due to the suction capacity of the electric suction device 1 and the capacity of the tank 3 and must be avoided. When the drainage at one location starts, the drainage is not performed at another location until the drainage is completed, and in particular, the electric switching valve is controlled not to be opened. In addition, lamps 30 and 30 'are provided on each operation panel 28 and 28' to notify that the lamps are being used in other places by lighting or blinking the lamps. However, this is not an essential component. Alternatively, without prior notice, the drainage operation may be started after the previous drainage is completed. The sequence circuit of the present invention described above in FIGS. 3 and 4 is illustrated as a block diagram and a time chart of each unit.
[0028]
M1, M2, and M3 are motors for driving the main stopper 13, the switching valve 18, and the electric suction device 1, respectively. The drainage command from the operation panel 28 is transmitted to the monitoring unit C0 of the control panel 23, and waits if the drainage operation is not completed by another drainage command. A drain signal is transmitted to the first control unit C1. Based on this signal, the first control unit C1 drives the motor M1 in the closing direction, and after a predetermined amount of driving, the direction detecting unit O1 and the drive detecting unit D1 detect that the main plug 13 is in the closed state, and stop the motor M1. Then, it outputs a completion signal to the second control unit C2.
[0029]
In response to this signal, the second control unit C2 drives the motor M2 in the opening direction, and when the motor M2 is driven by a predetermined amount, the direction detection unit O2 and the drive detection unit D2 indicate that the electric switching valve 18 has been opened. Upon detection, the motor M2 is stopped, and an opening signal is output to the timer T3. From this signal, the motor M3 is not driven during the time T31, and after the lapse of the time, the motor M3 is driven during the time T32 to operate the electric suction device 1. After the operation of the electric suction device 1, the signal enters the second control unit C2, through which the motor M2 is driven in the closing direction. After the predetermined amount of driving, the electric switching valve 18 is stopped in the closed state. I do.
[0030]
The draining operation is completed as described above. Until that time, the draining incomplete signal C4 is output to the monitoring unit C0 of the other system to wait for the draining command of the other system. In this case, in other systems, the main valve 13 may be operated, but it is necessary to prevent the electric switching valve 18 from being operated. Further, if the drainage incomplete signal C4 is transmitted to the lamp 30 'of the operation panel 28' and the lamp 30 'is turned on or blinked to notify that the previous user is present, the friendliness is further increased. In the motor M2 of the time chart of FIG. 4, the first upward arrow indicates the opening direction, and the next downward arrow indicates the closing direction.
[0031]
According to the above-described embodiment, since water can be drained only by operating the switch, no operation error occurs and the operation is simple. However, in order to reduce the installation cost, the main plugs 13 and 13 'may be manually operated. . In this case, it is necessary to first close the main plugs 13 and 13 'and then turn on the switches 29 and 29'.
[0032]
However, as described above, if the electric switching valves 18 and 18 'are opened before closing the main cocks 13 and 13' due to a malfunction, the pressurized water is discharged to the water discharge port 12, and the prevention is shown in FIG. Here is an example.
[0033]
FIG. 5 shows a configuration in which an electric switching valve 18 is formed above the main cock 13 so that the main cock 13 and the electric switching valve 18 are simultaneously operated, and the electric switching valve 18 is opened after the main cock 13 is closed. That is, a single electric device attempts to open and close the main plug 13 as well, and has an inlet 31, an outlet 32, and a drain hole 33, and is housed in a valve box 37 having cylinders 34, 35, and 36 therein. The piston 38 is equipped with three annular packings 39, 40, 41 sliding on the cylinders 34, 35, 36, extended by a rod 42 and connected to an operating rod 43, and the valve box 37 is It is extended and connected to the electric switching valve body 45.
[0034]
The electric switching valve body 45 has a water inlet 46 at the left end, a water inlet 47 at the right end, and a drain 21 in a direction perpendicular to the plane of the drawing, and presses the O-ring check valve seat 49 in the water inlet 46 by a spring 48. Similarly, the water inlet 47 accommodates the water stop 50 ′ pressed against the check valve seat 49 ′ of the O-ring by the spring 48 ′. A large-diameter pressing portion 51 is provided at the lower end of the operating rod 43 over the entire circumference.
[0035]
The figure shows the state of water flowing through the main plug 13. Water from an inlet 31 connected to a drawing pipe (not shown) passes through an outlet 32 and a rising pipe 14, passes through a water header 15 and a water inlet 46. , And further to the hot water inlet 47 via the water heater 16. At this time, water leakage is prevented by the annular packings 39 and 41, the water stop 50, and the hot stop 50 '.
[0036]
When the drainage operation is performed by turning on the switch 29 of the operation panel 28 from this state, the operation rod 43 is connected to the motor housed in the drive box 52 via a gear (both not shown) together with the operation rod 43. The piston 38 rises, first, the annular packing 40 comes into close contact with the cylinder 35 to block water from the inflow port 31, and then the annular packing 39 separates from the cylinder 34, but at the same time, the pressing portion 51 of the operating rod 43 is pressed. The water stopping body 50 and the water stopping body 50 ′ are pressed to be disengaged from the valve seats 49 and 49 ′, and the hot water is discharged from the drain holes 33 and the water outlet 21. Although not shown, a check valve is attached to the drain hole 33 to prevent underground sewage from entering the valve box 37.
[0037]
That is, an operation error of opening the electric switching valve 18 without closing the main plug 13 can be completely prevented. When the water is again passed, the operating rod 43 and the piston 38 are lowered, the water stopping body 50 and the water stopping body 50 'are closed first, and after the annular packing 39 is in close contact with the cylinder 34, the annular packing 40 is moved to the cylinder 35. And water is passed.
[0038]
Instead of using the water stopping body 50 and the water stopping body 50 ′, the water inlet 46, the water inlet 47, and the water outlet 21 may be formed stepwise and water may be stopped by an O-ring. Alternatively, a three-way ball valve as shown in FIG. 1 may be used, and the operating rod 43 rotates at a fixed position, and the piston 38 does not rotate but can be moved up and down. If the outlet 32 is not provided in the valve box 37 but is provided in the electric switching valve main body 45 and the inside of the outer tube 44 is used as the flow path, the rising pipe 14 can be omitted. In that case, it goes without saying that the valve structure is different.
[0039]
In addition, for example, a commercially available pressure switch is attached to an appropriate position of the water pipe from the riser pipe 14 to the electric switching valve 18 so that the water pressure becomes equal to or lower than a normal water pressure, such as a certain constant pressure, for example, 50 KPa or less. When the power switch is turned on and the electric switching valve becomes operable for the first time, or when a switch (for example, a micro switch) is attached to the operation part of the main stopper 13 and the main stopper 13 is stopped by the operation of the handle, the protrusion of the operation rod is formed. Can press the switch to energize the electric switching valve 18, and the main plug 13 can also be manually operated. In any case, unless the main plug 13 is closed, the electric switching valve 18 and the electric suction device 1 do not operate even when the switch 28 is turned on.
[0040]
As described above, since the method of forcibly sucking residual water in the pipe by the electric suction device is adopted, even if a rising and falling portion occurs as in a cross pipe, the electric suction can be performed only in a conceivable normal floor rolling pipe. As long as the device has a certain suction capacity, there is no water residue that would block the inside of the flexible tube, so that there is no accident that freezing is impossible due to freezing. In the above embodiment, the drainage devices for two houses have been described. However, this is, of course, limited, but even if the number increases, the control panel 23 becomes complicated, and basically there is nothing. It does not change.
[0041]
【The invention's effect】
As described above, in the present invention, drainage of a plurality of water pipes in an apartment or the like is performed by one electric suction device connected via a drain pipe to an electric switching valve provided separately for each door. Therefore, there is no need to install an electric suction device in each house, maintenance is easy and the cost is low. In addition, the air and hot water in the piping are both discharged to the outside by the electric suction device and used simultaneously by two or more houses. Is not performed, water can be reliably drained from the piping, whether it is a conventional branch pipe or a header-pipe, so that the pipe is restricted in consideration of remaining water. In addition, it is possible to omit the intake valve even in the portal pipe, and it is possible to prevent an accident of discharging a large amount of water from the water supply pipe to the drain pipe due to an operation error.
[Brief description of the drawings]
FIG. 1 is a schematic view of an apparatus in the case of a header-pipe according to the present invention.
FIG. 2 is a partial longitudinal sectional view showing one embodiment of the electric suction device of the present invention.
FIG. 3 is a block diagram showing one embodiment of the circuit of the present invention.
FIG. 4 is a time chart of each unit in FIG. 3;
FIG. 5 is a longitudinal sectional view showing another embodiment of the present invention.
[Explanation of symbols]
1 Electric suction device 13, 13 'Main stopper 14, 14' Rise pipe 18, 18 'Electric switching valve 21, 21' Drain port 22 Drain pipe 23 Control panel 28, 28 'Operation panel 29, 29' Switch

Claims (4)

A plurality of main cocks, a motor-operated switching valve connected to a downstream pipe thereof, and a motor-operated suction valve which is connected to a drain port of the motor-operated switching valve via a drain pipe and is capable of sucking both air and water. A device, a control panel thereof, and a plurality of operation panels are provided. When a switch of each operation panel is turned on, the electric suction device is operated via the control panel to forcibly discharge water in the pipe to the outside. An anti-freezing device for a plurality of water pipes, wherein 2. The sequence control according to claim 1, wherein the main cock is electrically operated, and when a switch on each operation panel is turned on, the electric switching valve is opened after closing the main cock and the electric suction device is operated after a certain time has elapsed. Anti-freezing device for multiple water pipes. 2. A plurality of electric switching valves according to claim 1, wherein the electric switching valve is provided above the main cock so that the operation of the main cock and the electric switching valve are simultaneously performed, and the electric switching valve is opened after the water supply pressure is shut off. An anti-freezing device for water pipes at eaves. 2. The freeze prevention of a plurality of water pipes according to claim 1, wherein the operation of the electric switching valve is controlled not to be performed by another operation panel after the water draining operation is completed after the switch of one operation panel is turned on. apparatus.

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