JPH01223268A - Medium liquid filling device for pipeline on roof - Google Patents

Abstract

PURPOSE:To dispense with a roof cistern, simplify the construction work, and improve the appearance by providing the first tank storing a medium liquid and the second tank for the steam separation and driving a pump to form a circulation path. CONSTITUTION:The first tank 11 storing a medium liquid and a pump P feeding the medium liquid to a roof pipeline 20 are provided on the roof pipeline 20 used for a snow melting device or a solar heat utilizing device or the like. The second tank 12 performing the stream separation of the medium liquid returned from the roof pipeline 20 is provided. A cross section expanded pipe 10b is connected to a pipeline 10a from the second tank 12 to the suction port of the pump P, a pipeline 10c from the first tank 11 is connected to it via a check valve Vc. The pump P is driven, the medium liquid is fed to the whole pipeline system to complete a circulation path.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a device for filling a roof piping with a medium liquid, for filling a roof piping installed on the roof of a house, such as for snow melting, with a medium liquid.

Conventional technology A roof-top snow melting device that connects roof-top piping installed on the roof of a house, a pump, and a boiler with a pipe line and circulates a heated liquid medium, and a roof-top snow melting device that circulates a heated medium liquid and uses solar thermal energy absorbed by the roof-top piping to generate heat. Solar heat utilization devices that extract and utilize heat using an exchanger are widely used.

Therefore, when using these devices, it is necessary to completely fill the long, curved roof piping with the medium liquid without leaving any air behind.

Therefore, a method has been adopted in which an open-type distern is installed on the roof and connected to the highest part of the piping on the roof to simultaneously vent air from the piping and fill it with a medium.

The problem to be solved by the invention is that when using the conventional technology, it is necessary to provide a pedestal when installing the cistern on the roof, which makes the construction complicated and also impairs the aesthetic appearance of the house. The problem of risk of damage could not be avoided.

Therefore, in view of the actual state of the prior art, it is an object of the present invention to remove air from the pipe when filling the pipe on the roof with the medium liquid, and to remove the air in the pipe when filling the pipe on the roof with the medium liquid, without installing a distern on the roof. Replenishment can be carried out quickly,
An object of the present invention is to provide a novel medium liquid filling device for rooftop piping.

Means for Solving the Problems The structure of the present invention for achieving the above object includes a first tank containing the medium liquid, a pump that sends the medium liquid to the roof-F piping, and a pump that sends the medium liquid to the roof-top piping. A second tank for separating air and water, a cross-sectional area expanding pipe is interposed in the pipeline from the second tank to the pump suction port, and a check valve is installed in this cross-sectional area expanding pipe. The gist is that the pipe line from the first tank was connected through the first tank.

Note that a jet pump that utilizes a portion of the medium liquid discharged by the pump may be formed on the upstream side of the cross-sectional area expanding tube, and the second tank may also be used as a boiler.

Therefore, when using this configuration, when the pump is operated,
The medium liquid in the first tank is sent to the roof piping by a pump, so the roof piping is sequentially filled with the medium liquid, and as a result, the air in the roof piping is transferred to the second tank. It is pushed out into the tank and discharged from the system.

In this way, when the medium liquid is filled over almost the entire length of the roof piping, the overflowing medium liquid returns to the second tank and accumulates there, so that eventually the second tank is also filled. Filled with medium liquid.

When the second tank is filled with medium liquid, the overflowing medium liquid flows into the pump suction port through the cross-sectional area enlarged pipe, so that it will eventually flow from the pump to the roof piping and the second tank. A circulation path for the medium liquid to return to the pump via the tank is completed.

If the pump continues to operate, the air remaining in the system including the roof piping and the second tank will be transported to the second tank by the circulation of the medium liquid, and from there the air will be continuously pumped into the system. Since the air is discharged to the outside, all of the remaining air in the system is finally exhausted and can be replaced by the medium liquid.

After the circulation path for the medium liquid is completed, when the air in the system is separated into steam and water in the second tank and discharged to the outside of the system, a corresponding amount of the medium liquid is transferred to the first tank. need to be replenished into the system. At this time, the replenishment medium liquid is combined with the circulating medium liquid from the second tank and then sucked into the pump, but the pipe line from the first tank is connected between the second tank and the pump. Since it is connected to the cross-sectional area expanding tube interposed between the inlet and the suction port, the merging of the medium liquid at this time is extremely smooth, and therefore the replenishment of the medium liquid and
Consequently, the evacuation of the remaining air in the system can be completed quickly.

In addition, when forming a jet pump that uses part of the medium liquid discharged by the pump on the upstream side of the cross-sectional area expanding pipe,
Due to the negative pressure generated by the jet pump, -periodic rate (
, replenishment of the medium liquid from the first tank can take place.

In addition, when the second tank is used as a boiler, the second tank can be used as a heating device for the liquid medium, which is particularly convenient when the roof piping is used as a snow melting device.

Example Examples will be described below with reference to the drawings.

The roof piping medium liquid filling device 10 includes a first tank 11
, a second tank 12, and a pump P (Fig. 1). However, between the second tank 12 and the suction port of the pump P, a cross-sectional area expanding tube 10b is interposed.

The first tank 11 is a tank made of metal or synthetic resin and is provided with an injection port lie for the medium liquid.A pipe line 10c is provided at the bottom of the first tank 11, and a cross-sectional area expanding pipe is provided through a check valve Vc. 10b.

The second tank 12 is a pressure-resistant tank made of metal, for example, and one end of the roof piping 20 is connected to the bottom of the second tank 12 via a conduit 10e. , a conduit 10a leading to the cross-sectional area expanding tube 10b is connected. A pipe line 10f is provided at the top of the second tank 12, branching to one end of each of the air relief valve Va and the safety valve Vs.The other end of the air relief valve Va is open to the atmosphere, while the safety valve Vs The other end is connected to the upper end of the first tank 11 via a pipe 10g.

Here, the air relief valve Va is for releasing air to the outside of the system when steam and water separation is performed in the second tank 12, and the safety valve Vs is for releasing air from the system when the second tank 12 is under high pressure. This is for the purpose of returning the medium liquid to the first tank 11 when the liquid medium is ejected.

The cross-sectional area expanding tube 10b has a larger cross-sectional area than the pipe line 10a, and one end thereof is connected to the pipe line 10a, and the other end is connected to the suction port of the pump P.

Note that the cross-sectional area of the cross-sectional area expanding tube 10b is preferably larger than the total cross-sectional area of the conduit 10a and the conduit 10c.

A discharge port of the pump P is connected to one end of the rooftop piping 20 via a check valve vb and a pipe line 10d.

The operation of the roof piping medium liquid filling device 10 having such a configuration is as follows.

When the medium liquid is injected from the injection port 11e of the first tank 11 and the pump P is operated, the medium liquid is sucked into the pump P through the pipe line 10c, the check valve c, and the cross-sectional area expanding pipe 10b. At the same time, it is fed into the rooftop piping 20 via the check valve Vc and the pipeline 10d. In this way, when the medium liquid is sent into the roof pipe 20, the air inside the pipe passes through the pipe line 10e and the second tank 12, and is discharged to the outside of the system via the air relief valve Va. The inside of the roof piping 20 can be filled with a medium liquid.

When the roof piping 20 is filled with the medium liquid, the overflowing medium liquid passes through the pipe line 10e and accumulates in the second tank 12, but during this time, air is continuously discharged from the air relief valve Va. It will be held in

When the second tank 12 is filled with the medium liquid, the medium liquid overflowing from there flows into the pipe line 10a, and the cross-sectional area expanding pipe 10b
The suction port of the pump P can be reached via the
, the circulation path of the medium liquid to the suction port of the pump P via the second tank 12 is completed. Furthermore, until this point, the medium liquid from the first tank 11 is continuously pumped into the system by the pump P.

If the pump P continues to operate after the medium liquid circulation path is completed, the air locally remaining in the system will be removed.
Since it is transported to the second tank 12 together with the medium liquid, it is separated from the medium liquid and steam and water in the second tank 12, and can be discharged to the outside of the system from the air relief valve Va. Also,
When the air is discharged in this manner, an amount of liquid medium corresponding to the volume thereof can be automatically replenished from the first tank 11.

Note that the circulating bone medium liquid flowing from the second tank 12 into the cross-sectional area expanding tube 10b via the conduit 10a and the tank 11
Therefore, the replenishment medium liquid flowing into the cross-sectional area expanding tube 10b via the pipe line 10c flows into the cross-sectional area expanding tube 10b and joins there.
Since the cross-sectional area of b is large, the merging of the two can be performed smoothly, and therefore, there is no risk that the suction and delivery functions of the medium liquid by the pump P will be impaired. That is, since the flow rate of the medium liquid in the cross-sectional area expanding tube 10b becomes slower,
This is because the occurrence of eddies in the medium liquid is reduced, and therefore, the inflow of air bubbles into the pump P can be reduced. In addition, since a check valve Vc is interposed between the pipe line 10c and the cross-sectional area expanding pipe 10b, the medium liquid refilled into the system from the first tank 11 is transferred to the first tank. There is no risk of backflow to 11.

As described above, it is possible to continuously discharge air and replenish the medium liquid to the roof piping 20, so that the air in the system including the roof piping 20 is eventually replaced by the medium liquid. It can be completely replaced.

Note that when the roof piping 20 is completely filled with the medium liquid, the medium liquid flows from the first tank 11 into the cross-sectional area expanding pipe 1.
0b, but even if the pump P continues to operate in this state, the medium liquid will simply be circulated and there will be no problem. Furthermore, even if the pressure inside the second tank 12 becomes high, the medium liquid is returned to the first tank 11 from the safety valve Vs, so it is safe.

Another Embodiment In FIG. 1, if the second tank 12 is changed to a boiler, the medium liquid can be heated here, and the heated medium liquid can be circulated through the roof piping 2o. It can be effectively used as an upper snow melting device. In addition, the circulation path of the medium liquid at this time is the second
Since it is a closed system consisting of the tank 12, the pump P, and the roof piping 20, the evaporation loss of the liquid medium can be extremely reduced.

Moreover, on the upstream side of the cross-sectional area expanding tube 10b in FIG.
A jet nozzle 10k is provided, and a part of the medium liquid discharged by the pump P is sent to the jet nozzle 10k via a pipe line 10j.
(FIG. 2). By means of a jet pump, the first tank 1
Since the medium liquid from 1 can be sucked into the pump P more smoothly, it is possible to further improve the replenishment efficiency of the medium liquid. Note that this jet pump may be formed not only on the upstream side of the cross-sectional area expanding tube 10b but also in the middle thereof.

DETAILED DESCRIPTION OF THE INVENTION According to the invention, a first tank containing a liquid medium, a pump for feeding the liquid medium to a rooftop piping,
A second tank is provided to separate air and water from the medium liquid returned from the roof piping, and a cross-sectional area enlarged pipe is interposed in the pipe line leading from the second tank to the pump suction port, and a non-return check is installed there. By connecting the first tank through the valve, the medium liquid circulating within the system and the medium liquid replenishing the system smoothly merge in the cross-sectional area enlarged pipe, so that the medium to the roof piping is It is possible to efficiently fill the liquid, and since there is no need to install a distern on the roof, there is an excellent effect that there is no risk of complicated construction or spoiling the aesthetic appearance of the house.

Furthermore, if a jet pump is formed on the upstream side of the cross-sectional area expanding pipe, the efficiency of replenishing the medium liquid by the pump can be further increased, and if the second tank is used as a boiler, it is possible to easily melt snow on the roof. It has the excellent effect of being able to construct a device.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the overall configuration system of the embodiment. FIG. 2 is an explanatory diagram of the main part configuration of another embodiment. P...Pump Vc...Check valve 10...Rooftop piping medium liquid filling device 10a, 10c
...-Pipeline 10b...Cross-sectional area expanding pipe 10k...Jet nozzle 11...First tank 12...Second tank 20...Rooftop piping

Claims (1)

[Claims] 1) A first tank containing a medium liquid, a pump that sends the medium liquid to the rooftop piping, and a second tank that separates the medium liquid returned from the rooftop piping from air to water. A cross-sectional area expanding pipe is interposed in the pipe line leading from the second tank to the suction port of the pump, and the cross-sectional area expanding pipe is connected to the first tank through a check valve.
Rooftop piping medium liquid filling device that connects the pipe line from the tank. 2) The cross-sectional area expanding tube is provided with a jet nozzle, and the cross-sectional area expanding tube and the jet nozzle form a jet pump that utilizes a part of the medium liquid discharged by the pump. A device for filling a medium liquid for rooftop piping according to scope 1. 3) The device for filling a medium liquid for rooftop piping according to claim 1 or 2, wherein the second tank is a boiler.