JP3007791B2 - Automatic transfer device for liquids and other fluids - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste liquid (water) for sending waste water containing solids to the outside from a waste water (solids containing) pump station provided in an underground structure of a building or the like.
Automatic transfer device. Also, the present invention relates to an automatic transfer device that facilitates automatic transfer of a fluid such as a steel mill scale or a mill scale of a machine tool such as a lathe and a fluid such as a raw material (liquid material) in a production process.

[0002]

2. Description of the Related Art Conventionally, in order to transfer wastewater stored in an underground structure of a building or the like to the outside, an electric drain pump having a power supply outside the storage tank (usually on the upper floor) is operated.
Wastewater was transferred to drainage pipes. Moreover, the transfer of a general discharge and feed of the liquid, etc. fluids containing mill scale and the like at the production stage (liquid material) is also dedicated al electric drive system has been utilized.

[0003]

Now, the case of wastewater will be described. In the case of transferring wastewater and other liquids (including solids) as described above, the wastewater is generated with the operation of the electric motor. Since the sound of the building echoes inside buildings and other structures, the driving time and time must be selected.
In addition, when installing the pump, it was necessary to consider where to place it. In the case where solid matter is contained in wastewater or the like and is discharged, a heavy load is applied to an electric driving device such as a motor, which further generates noise and causes a failure. In addition, even when a fluid such as a liquid used in a production facility or a raw material supply for discharging a waste liquid is transferred, generation of noise is inevitable as long as the electric driving device is used.

The present invention solves the problems associated with the transfer of fluids such as liquids such as wastewater, and provides an automatic transfer device which can transfer the liquids such as wastewater without sound as needed. The purpose is to: It is another object of the present invention to transfer a fluid in a production facility without using an electric drive device and to prevent generation of noise.

[0005]

According to the present invention, there is provided an automatic transfer device for a fluid such as a liquid such as a waste liquid according to the present invention, wherein the through hole is formed such that the fluid flows in and out of a through hole provided in a bottom portion, respectively. A pair of check valves for opening and closing the flow paths on the inflow and outflow sides of the fluid in communication with the liquid, a liquid level detection means for detecting the upper and lower limit liquid levels of the fluid flowing into the storage tank, Until the upper limit liquid level is reached, the reservoir is opened to the atmosphere.When the upper limit liquid level is reached, one valve that has been opened to the atmosphere is closed, and the other valve on the pressurized gas side is opened to open the reservoir. By pressurizing and opening the check valve on the outflow side and closing the check valve on the inflow side, the fluid in the storage tank is discharged to the outside via the outlet pipe. If there is no suction lift on the inflow side, the inside of the liquid storage tank is evacuated to allow the liquid to flow.

[0006]

In the present invention, the inflow and outflow of the fluid in the liquid storage tank is performed by a check valve operated by fluid pressure, and there is no pumping means by an electric driving device required for inflow and outflow of the fluid. there is no occurrence of a failure due to overheating due to overload, tooth there is no occurrence of noise and vibration be. The use of the sensor has the effect that the opening and closing of the fluid inflow / outflow valve is more completely and reliably performed than that using the difference in atmospheric pressure, and the flow rate of the fluid is easily controlled.

[0007]

Embodiment 1 FIG. 1 is a vertical sectional view showing the structure of an automatic transfer device for a fluid such as a liquid waste or the like according to a first embodiment of the present invention. In the figure, reference numeral 1 denotes a liquid storage tank for temporarily storing a waste liquid or the like, and the waste liquid or the like flows in or out from a through hole 1a provided on the bottom surface of the tank via an inlet pipe 2 and an outlet pipe 3, respectively. ing. 2a is a check valve for closing the valve when the fluid pressure acts on the inlet pipe 2 direction, 3a is a check valve for closing the valve by the action of the head difference h ₂ -h ₁ to be described later, 4 high liquid level detection Liquid level detecting means provided in a pipe with a liquid level detecting section 4a and a low liquid level detecting section 4b, and the liquid level detected by a liquid level switch 4c provided at the top of the pipe in the ceiling 1b of the liquid storage tank 1. Switching is performed depending on the position. Numeral 5 is a three-way solenoid valve provided at the top of a through pipe 1c provided at the top 1b of the liquid storage tank 1. The solenoid 5a receives a signal from the liquid level switch 4c by an electrical connection (not shown). The valve 5b on the pressurized gas side is closed until the fluid flowing into the liquid storage tank 1 reaches the high liquid level detection unit 4a, and is opened when the fluid reaches the high liquid level.
The valve 5c on the atmosphere open side is closed.

Next, the operation based on the above configuration will be described with reference to FIGS. FIG. 2 is a vertical cross-sectional view showing an operation in which the fluid from the inlet pipe 2 side opens the check valve 2a by the head pressure or pressure feed and flows into the liquid storage tank 1 through the through hole 1a. The check valve 3a is closed by the head pressure of the discharged liquid remaining on the outlet pipe 3 side.
When the high liquid level detecting unit 4a provided in the liquid level detecting means 4 detects the increase in the fluid flowing into the liquid storage tank 1, the liquid level switch 4c is turned on by an electric circuit (not shown) in response to the detection. A signal is transmitted to the solenoid 5a of the three-way solenoid valve 5 through the valve, and the valve 5c on the atmosphere opening side, which has been opened up to that time and which has opened the inside of the liquid storage tank 1 to the atmosphere, is closed and the compressed gas side is opened. The valve 5b is opened, and pressurized gas is sent into the liquid storage tank 1 through the through pipe 1c and pressurized.

FIG. 3 is a vertical cross-sectional view for explaining the operation after the above-described process. When the valve 5c on the open air side is closed and the valve 5b on the pressurized gas side is opened, the pressurized gas is released. Since the liquid stored in the liquid storage tank 1 through the through hole 1c is pressurized, the check valve 2a on the inlet pipe 2 side is closed by this pressurization, and the check valve 3a on the outlet pipe 3 side is opened. As a result, the liquid is discharged to the outside through the outlet pipe 3 by the pressurizing action in the liquid storage tank 1. When this discharge operation proceeds and the water level of the stored fluid reaches the low liquid level detecting section 4b of the liquid level detecting means 4, the liquid level switch 4c is activated to operate the three-way solenoid valve 5 on the pressurized gas side. 5b
And the valve 5c on the open-to-atmosphere side is opened, the check valve 3a is closed by the head pressure of the fluid such as drainage remaining on the outlet pipe 3 side, and the liquid in the liquid storage tank 1 has a low liquid level. The operation is terminated while the liquid level in the detection unit 4b is maintained. In the practice of the present invention, when the liquid storage tank is installed in a room containing a liquid such as a waste liquid, it is needless to say that it is preferable to install electric contacts and driving parts such as a liquid level switch and a three-way solenoid valve outside the room. It is.

Embodiment 2 FIG. 4 is a vertical sectional view showing the structure of an automatic discharge device for fluid such as waste liquid according to a second embodiment of the present invention. In the figure, a liquid storage tank 1, an inlet pipe 2, an outlet pipe 3, check valves 2a, 3a
The three-way solenoid valve 5 has the same configuration as that of the member with the same reference numeral in the first embodiment described above, and a description thereof will be omitted to avoid duplication. Reference numerals 4a and 4b denote a high liquid level detector and a low liquid level detector fixed on the outer wall of the liquid storage tank 1, respectively, for detecting a liquid level by a float type, a flap type, a magnet type, or the like. When each of the liquid levels is detected, the solenoid 5a of the three-way solenoid valve 5 is operated by an electrical connection (not shown).

Next, the operation will be described with reference to FIGS. 5 and 6 based on the configuration of FIG. 4. However, as described above, the configurations of FIGS. Therefore, the same operation will be simply described. Inlet pipe 2
The liquid level flowing through the check valve 2a is higher than the high liquid level detector 4.
When the pressure reaches the level a, the solenoid 5a is actuated via an electric connection (not shown) to switch the valve position of the three-way solenoid valve 5 and pressurized gas flows into the liquid storage tank 1, as shown in FIG. Then, the fluid in the liquid storage tank 1 is discharged to the outside from the outlet pipe 3 through the opened check valve 3a, and when the fluid level reaches the low fluid level sensor 4b as the fluid decreases, the solenoid is operated. By operating the valve 5a, the valve position of the three-way solenoid valve 5 is switched, the check valves 2a and 3a are closed, and the operation ends. In this structure, since the liquid level detecting means is provided on the lateral surface of the liquid storage tank, as shown in FIG. 1, a complicated structure is provided in which a detection tube is provided from the upper surface of the liquid storage tank and two liquid level detection sites are provided therein. Although not required, the area around the storage tank cannot be used as a storage chamber.

Embodiment 3 FIG. 7 is a vertical sectional view showing the structure of an automatic discharge device for a fluid such as a waste liquid according to a third embodiment of the present invention. In the figure, a liquid storage tank 1, an inlet pipe 2, an outlet pipe 3, check valves 2a, 3a
The three-way solenoid valve 5 has the same configuration as that of the member with the same reference numeral in the first embodiment described above, and a description thereof will be omitted to avoid duplication. Reference numeral 6 denotes the volume based on the upper and lower limits of the liquid stored in the storage tank 1, the flow rate of the fluid flowing from the inlet pipe 2, the flow rate of the fluid discharged from the outlet pipe 3, and the like, based on a previously calculated time conversion. This is a setting timer for setting the upper and lower limits of the liquid to be stored in the liquid storage tank 1. At the time of the upper and lower limits, the solenoid 5a is operated to switch the three-way solenoid valve 5. Reference numeral 7 denotes a float valve that operates when the liquid level abnormally rises, which is described later.

Next, based on the configuration of FIG. 7, FIGS.
The operation will be described with reference to FIG. However, the operation by the same members as those in FIG. 1 described above will be briefly described. The liquid flowing from the inlet pipe 2 via the check valve 2a reaches a predetermined high liquid level when a set time calculated based on a previously calculated flow time elapses. Next, the three-way solenoid valve 5 is operated by the solenoid 5a according to the signal from the setting timer 6 to switch the open / close position of the valve (see FIG. 8). However, in this case, if the liquid level rises abnormally due to some kind of failure or the like, the through pipe 1c is closed by a spherical valve 7a provided at the tip of the float valve 7 as shown in FIG. , To prevent overflow to the three-way solenoid valve 5. Next, when the pressurized gas flows into the liquid storage tank 1 by switching the three-way solenoid valve 5, the liquid in the liquid storage tank 1 is drained to the outside from the outlet pipe 3 through the opened check valve 3a. When the low liquid level corresponding to the time set by the setting timer 6 is reached, the solenoid 5a is operated by the signal of the setting timer 6, the valve position of the three-way solenoid valve 5 is switched, and the check valves 2a and 3a The operation is terminated by closing (FIG. 1
0).

Embodiment 4 FIG. 11 is a vertical sectional view showing a structure of an automatic apparatus for discharging waste liquid or the like according to a fourth embodiment of the present invention. In the figure,
Since the liquid storage tank 1, the outlet pipe 3, the check valves 2a and 3a, the liquid level detecting means 4 and the three-way solenoid valve 5 have the same configuration as the members having the same reference numerals in the first embodiment, in order to avoid duplication. The description is omitted. Reference numeral 2 denotes an inlet pipe through which waste liquid and the like from below the liquid storage tank 1 flows, and shows a state where there is no suction lift. 8
Is an electromagnetic two-way valve fixed to the end of a conduit 1d provided through the top of the liquid storage tank 1. A solenoid 8a for operating this valve is connected to a liquid level switch 4c and an electric connection (not shown). The electromagnetic two-way valve 8 is operated according to the signal of the liquid level switch 4c to open and close the valves between the vacuum line 8b and the line 1d. Reference numeral 5d denotes a bleeder valve (automatic atmospheric release valve) which will be described in detail in the description of the operation below.

Next, the operation will be described with reference to FIGS. 12 and 13 based on the configuration of FIG. However, the operation by the same members as those in FIG. 1 described above will be briefly described. For example, when draining waste liquid stored in a basement of a building or the like to the outside, the inlet pipe 2 does not normally have a suction lift to a drainage device installed on the ground. Under such conditions, it is necessary to apply a degree of vacuum from the drainage device side to inhale. Therefore,
First, in order for the liquid to flow into the liquid storage tank 1 from the inlet pipe 2 having no suction lift, the three-way solenoid valve 5 and the two-way solenoid valve 8 are operated by the signal of the liquid level switch 4c corresponding to the detection of the low liquid level detection section 4b.
When the valve position of the three-way solenoid valve 5 is opened and closed to the atmosphere opening side and the valve position of the two-way solenoid valve 8 is opened to the vacuum suction side, the amount of air from the bleeder valve 5d which sucks in the atmosphere from a small diameter. When the degree of vacuum (minus pressure) from the pipe line 1d increases and the liquid flowing from the inlet pipe 2 via the check valve 2a reaches the high liquid level detection unit 4a (see FIG. 12), the liquid level switch The valve position of the three-way solenoid valve 5 and the two-way solenoid valve 8 is switched by the signal of 4c, the vacuum path from the line 1d is cut off, and the pressurized gas from the line 1c
As the check valve 3a opens, waste liquid and the like are discharged to the outside from the outlet pipe 3 when the check valve 3a is opened, and when the liquid level in the liquid storage tank 1 reaches the low liquid level sensor 4b. Then, the pressurized gas path is cut off by the operation of the liquid level switch 4c, and the inside of the liquid storage tank 1 is slowly opened to the atmosphere via the bleeder valve 5d, and the operation ends.

In the fourth embodiment, the liquid level detecting means 4
Has been described with the same configuration as that of the first embodiment, but the same effect as that of the liquid level detection means 4 described in the second or third embodiment can be obtained.

[0017]

As described above, according to the present invention, the waste liquid or the like which is stored in a building or the like and which should be discharged to the outside flows into the storage tank via the check valve, and the amount of the inflow is stored. When the liquid level reaches a predetermined level in the liquid tank, the pressurized gas flows from above the liquid and is discharged through the check valve on the outlet pipe side. Therefore, an automatic transfer device for operable liquids such as waste liquid can be obtained without generating noise and vibration and without causing trouble due to overheating of the electric driving device. In addition, since the sensor is used, the operation is assured, the inflow and outflow of the fluid are surely performed, and there are special effects such as easy implementation in combination with a timer or the like.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a configuration of an automatic discharging device for waste liquid and the like according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the first embodiment of the present invention.

FIG. 3 is a diagram for explaining the operation of the first embodiment of the present invention.

FIG. 4 is a vertical sectional view showing a configuration of an automatic draining device for waste liquid and the like according to a second embodiment of the present invention.

FIG. 5 is a diagram for explaining the operation of the second exemplary embodiment of the present invention.

FIG. 6 is a diagram for explaining the operation of the second embodiment of the present invention.

FIG. 7 is a vertical sectional view showing a configuration of an automatic discharging device for waste liquid and the like according to a third embodiment of the present invention.

FIG. 8 is a diagram for explaining the operation of the third embodiment of the present invention.

FIG. 9 is a diagram for explaining the operation of the third embodiment of the present invention.

FIG. 10 is a diagram for explaining the operation of the third embodiment of the present invention.

FIG. 11 is a vertical sectional view showing a configuration of an automatic discharging device for waste liquid and the like according to a fourth embodiment of the present invention.

FIG. 12 is a diagram for explaining the operation of the fourth embodiment of the present invention.

FIG. 13 is a diagram for explaining the operation of the fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Storage tank 1a Through-hole 1b Top 1c Pipe 1d Pipe 2 Inlet pipe 2a Check valve 3 Outlet pipe 3a Check valve 4 Liquid level detecting means 4a High liquid level detecting section 4b Low liquid level detecting section 4c Liquid Surface switch 5 Three-way solenoid valve 5a Solenoid 5b Pressurized gas side valve 5c Air release side valve 5d Bleeder valve 6 Setting timer 7 Float level gauge 8 Two-way solenoid valve 8a Solenoid 8b Vacuum path

────────────────────────────────────────────────── ─── Continuation of front page (72) Katsuhiro Kikuichi, Inventor 12-4 Torihama-cho, Kanazawa-ku, Yokohama-shi Inside Yokohama Engineering Co., Ltd. (56) References JP-A-2-96207 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) C02F 1/00

Claims (5)

(57) [Claims] 1. A liquid storage tank formed so that a fluid flows in and out of a pair of through holes provided on a bottom surface portion, and a flow path on the inflow and outflow side of the fluid communicating with the through hole. A pair of check valves for opening and closing, a liquid level detecting means for detecting an upper limit liquid level and a lower limit liquid level of the fluid flowing into the liquid storage tank, respectively, and the detecting means shifts the lower limit liquid level to the upper limit liquid level. Until the liquid tank reaches the upper limit, the three-way solenoid valve is configured to open one of the valves opened to the atmosphere and open the other valve on the pressurized gas side when the upper limit liquid level is reached. And an automatic transfer device for a fluid such as a liquid material. 2. A liquid level detecting means is provided in a pipe penetrating from a top part of a liquid storage tank to a lower part thereof.
An automatic transfer device for a fluid such as a liquid described in the above. 3. The automatic transfer device for fluids such as liquids according to claim 1, wherein said liquid level detecting means is provided on an outer peripheral portion of said liquid storage tank. 4. The automatic fluid level control system according to claim 1, wherein said liquid level detecting means is a float level gauge and a timer for setting upper and lower limits of the liquid level provided in said liquid storage tank. Transfer device. 5. When there is no suction head on the inflow side of the liquid storage tank, the valve on the vacuum path side is opened when the fluid flows in above a pipe passing through the top of the liquid storage tank, and the flowing liquid is supplied to a predetermined position. 2. The automatic transfer device as claimed in claim 1, further comprising a two-way valve for closing the valve on the vacuum path when the liquid level is reached.