JPS639648Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hydraulic antifreeze device that prevents water pipes, fire hydrants, etc. from freezing during cold weather.

If the water inside water pipes, fire hydrants, etc. freezes, not only will they not be able to perform their original functions, but the pipes may burst. For this reason, various types of antifreeze devices have been invented and devised to prevent explosion accidents, etc., but all of them have complex mechanisms, are prone to failure, and are unstable in operation. Generally speaking, as a measure to prevent freezing,
When there is a risk of freezing, a method is widely used in which a sufficient amount of water is constantly discharged to prevent water from freezing inside water pipes, etc., and the internal water is constantly flowing without being stagnant. However, such a method is uneconomical because water is discharged unnecessarily until the water inside the water pipe reaches a temperature that freezes.

The present invention avoids such uneconomical and wasteful discharge of internal water from water pipes, etc., and only releases a small amount of water intermittently to prevent freezing when the outside temperature drops to freezing temperature. The object of the present invention is to provide an antifreeze device having an extremely simple structure and at low cost, which has a function of automatically and reliably performing an operation that releases an extremely small amount of discharge.

Hereinafter, embodiments of the hydraulic antifreeze device according to the present invention will be described based on the drawings.

In FIGS. 1 and 2, each of the upper chamber 4, the middle chamber 5, and the lower chamber 6, which are formed by the relief valve 2 and the slidable disk 3 arranged in the valve body 1, , respectively, are provided with a relief pipe 7 connection 8, an inflow pipe 9 connection 10, and an outflow pipe 11 connection 12, the relief valve 2 having a diameter smaller than at least the diameter of the disk 3, and both of these 2, 3 The connecting rod 13 connects the upper chamber 4,
The middle chamber 5 and the lower chamber 6 are interconnected in a manner that they can be shut off, and a communication passage 14 consisting of a pore is provided between the middle chamber 5 and the lower chamber 6, as shown in FIG. In the embodiment shown in FIG.
Both ends 17, 17 of the outer tube 16 provided with the outer tube 16 are fixed in a closed state, and the connecting portions 18 of the outflow tube 11 are provided at both ends thereof, and the connecting portions 18 are connected to the outflow tube 11.
Furthermore, the ends of the inner tubes 15 are connected to the relief tubes 7, respectively. Note that the relief valve 2 is the valve seat 2.
Both 2 and 3 are connected by a connecting rod 13 such that the disk 3 in which the communication passage 14 is formed comes into contact with the valve seat 25 when the disk 3 is in the position where it comes into contact with the valve seat 25 .

In addition, a discharge amount control valve 22 is provided at the connection portion 10 of the inflow pipe 9.
However, by providing a discharge flow control valve like this, the device of this invention can be used in water pipes that do not have valves installed, or in fire hydrants where valves are large and it is difficult to adjust small flow rates. Even when connected, there is an advantage that the discharge amount to the relief pipe 7 can be adjusted by the discharge amount control valve 22 to the minimum amount necessary to prevent the fire hydrant etc. from freezing.

In addition, in another embodiment of the present invention shown in FIG.
9, an outer tube 16 made of a spiral flexible tube is fitted onto the outside, and the outer tube 16 and the inner tube 15 form a spiral water passage 20, and the outflow pipe 11 is connected to both ends of the water passage 20. forming a section 18 and connecting the connection 18 to the outflow pipe 11 and to the inner pipe 15.
The ends are respectively connected to the relief pipe 7. In addition, as a means to thaw the freeze inside the outflow pipe,
The method is not limited to the above method, but a thin tube is spirally wound around the outer circumferential surface of an inner tube having both ends open, and connecting portions of the outflow tube 11 are formed at both ends of the thin tube, and the ends of the inner tube are connected to a relief tube. 7, it is also possible to connect the outflow pipe connections to the outflow pipes 11 respectively.

Moreover, if the inside of the valve body 1 is configured as shown in the diagram,
Since the middle chamber 5 and the lower chamber 6 are shut off by the inner circumferential surface of the valve body 1 and the sliding surface of the disk 3, they can always be shut off regardless of the vertical position of the relief valve 2. Therefore, there is an advantage that not only the valve seat of the disk 3 is not required, but also the distance between the relief valve 2 and the disk 3 does not need to be adjusted. In this case, in order to more watertightly and slidably engage the inner peripheral surface of the valve body 1 and the disk 3,
Of course, an O-ring may be provided around the outer circumference of the disk 3. In addition, a communication path 14 made of a thin tube
By providing the outflow control valve 23 in the outflow pipe 11, the flow rate of the outflow pipe 11 can be adjusted as desired, which has the effect of changing the freezing speed of the outflow water.
Note that 26 is a stopper for preventing the disk 3 from rising too high.

The anti-freeze device of the present invention has an extremely simple structure as described above, so there is not only no risk of failure or malfunction, but also the component parts are comparable to many of the anti-freeze devices conventionally devised. Since no springs such as coil springs are used, the operating valves (relief valve 2 and disk 3) of the device of the present invention are not affected by the elasticity of the springs, and therefore the water supply at the installation point No matter how the water pressure in the pipes or fire hydrants fluctuates, it always operates reliably.

Since the antifreeze device of the present invention has the above-described configuration, if water is passed through the device through the inflow pipe 9, all the water flowing from the middle chamber 5 to the outflow pipe 11 will pass through only the communication path 14. . For this reason, the communication path 1
By regulating the water flow rate in step 4, the flow rate in the outflow pipe 11 can be kept small, and the diameter of the outflow pipe 11 can be made small, so that the water inside the water pipe etc. does not reach freezing temperature. Prior to reaching
This can cause the portion of the passageway 20 in the outflow pipe 11, which has a large cooling effect, to freeze more quickly.

Therefore, if the device of the present invention is connected to a fire hydrant, water pipe, or water faucet a that is expected to freeze during cold weather, and a very small amount of water is allowed to flow out into the outflow pipe 11, the outside temperature can be reduced. When the temperature is above zero, the relief valve 2 and the disk 3 are lowered to the position shown in the drawing due to the water pressure in the middle chamber 5 acting on the difference in the pressure receiving areas of both 2 and 3, and the relief valve 2 is moved to the valve seat. 24 to close the valve hole. In addition, in the embodiment shown in FIG. 1, the disk 3 is in pressure contact with the valve seat 25 at the same time as the relief valve 2 is in pressure contact with the valve seat 24, closing the valve hole, and the second In the embodiment shown in the figures, a connecting rod 13 fixed to the relief valve 2 limits its lowering.

In this way, when the outside air temperature is above the freezing temperature, the pressure water that has entered the middle chamber 5 closes the relief valve 2.
Since the disk 3 automatically operates to prevent the water from flowing out from other than the communication path 14, a very small amount of water flows out only from the outflow pipe 11. (The device of the present invention operates reliably even if the amount of water flowing through the outflow pipe 11 is extremely small.) Therefore, when the outside temperature drops below zero degrees,
Outflow pipe 11 with a large cooling effect before the water inside water pipes or fire hydrants drops to freezing temperature
The water in the 20 portions of the water passages will first freeze. As a result, the pressure in the lower chamber 6 increases due to the pressure water passing through the communication path 14 and becomes equal to the pressure in the middle chamber 5. rises to the position shown by the broken line in the drawing and opens the valve hole of the valve seat 24. Therefore, the water inside the water pipe or the like is discharged to a predetermined location through the relief pipe 7, and freezing due to stagnation of the internal water is prevented. However, such discharge of internal water from water pipes, etc. cannot be continued indefinitely, and when internal water with a temperature higher than zero flows through the relief pipe 7, the heat is conducted to the water passage 20 portion of the outlet pipe 11. As a result, the once frozen ice is melted again, so that the relief valve 2 automatically returns to the position where it closes the valve hole of the valve seat 24.

Although the device of the present invention has a very simple structure, as is clear from the above explanation, if it is connected to water pipes that are expected to freeze, it will be possible to remove large amounts of water at temperatures other than freezing. By automatically and repeatedly discharging a small amount of tap water temporarily while the water reaches freezing temperature without wasting water, we can prevent water pipes from freezing and the resulting bursting accidents. This can be reliably prevented, and its practical effects are extremely large.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal side view showing one embodiment of the device of the present invention, and FIG. 2 is a partially longitudinal side view showing another embodiment of the device of the present invention. DESCRIPTION OF SYMBOLS 1...Valve box body, 2...Relief valve, 3...Disk, 4...Upper side chamber, 5...Middle side chamber, 6...Lower side chamber, 7...Relief pipe, 8...Relief pipe connection part, 9...
Inflow pipe, 10...Inflow pipe connection part, 11...Outflow pipe, 12, 18...Outflow pipe connection part, 13...Connecting rod, 14...Communication path, 15...Inner pipe, 16...Outer pipe , 20... Water passage, 21... Cooling fin, 22
...Discharge amount control valve, 23...Outflow amount control valve.

Claims (1)

[Claims for Utility Model Registration] 1. In each of the upper chamber 4, middle chamber 5, and lower chamber 6 formed by the relief valve 2 and the slidable disk 3 disposed in the valve body 1 part. , respectively, relief pipe 7 connection part 8, inflow pipe 9 connection part 1
0, and an outflow pipe 11 connection part 12, the relief valve 2 has a diameter smaller than at least the diameter of the disk 3, and the relief valve 2 and the disk 3 are connected by a connecting rod 13 to the upper chamber 4,
The middle chamber 5 and the lower chamber 6 are interconnected in a manner that allows them to be disconnected from each other, and the middle chamber 5 and the lower chamber 6
A communicating path 14 made of pores is provided between the escape tube 7 and the outlet tube, and furthermore, when the fluid in the outflow tube 11 freezes, a means for thawing the freeze by the heat of the fluid in the escape tube 7 is provided between the escape tube 7 and the outflow tube. A hydraulic anti-freezing device characterized by being installed in 11 piping systems. 2. As a means for thawing the frozen material, both ends 17, 17 of the outer tube 16 are fixed in a closed manner to the outer periphery of the inner tube 15, which is open at both ends, and the connecting portions 18 of the outflow tube 11 are provided at both ends of the inner tube 15. 15 end to the relief pipe 7, and the outflow pipe connection 18 to the outflow pipe 1.
1. Hydraulic antifreeze device according to claim 1, each of which is connected to a hydraulic antifreeze device according to claim 1. 3. As a means for thawing the frozen state, an outer tube 16 made of a spiral serpentine tube is fitted onto the outer circumferential surface 19 of the inner tube 15, which is open at both ends, and the outer tube 16 and the inner tube 1 are
5 to form a spiral water passage 20, and the outflow pipe 11 connection part 18 is formed at both ends of the water passage 20, and the end of the inner pipe 15 is connected to the relief pipe 7, and the outflow pipe connection part 18 is connected to the escape pipe 7. Hydraulic antifreeze device according to claim 1, each connected to the outflow pipe 11. 4. The hydraulic antifreeze device according to claim 2 or 3, in which cooling fins 21 are provided on the outer circumferential surface of the outer tube 16. 5. The hydraulic antifreeze device according to claim 1, 2, 3, or 4, in which the inflow pipe connecting portion 10 is provided with a discharge flow control valve 22. 6. Hydraulic antifreeze according to claim 1, 2, 3, 4, or 5 of the utility model registration claim, in which the communication passage 14 is provided with an outflow control valve 23. Device.