JPH0547486U - Automatic pump - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides an automatic pump which has a simple and easy structure and can obtain filtered water of raw water for a long period of time only by installing a stop valve. [Structure] A filter is provided inside the pressure tank to separate the water supply port from the pressure tank, and the raw water is discharged from the flow path for discharging the raw water to the pressure tank through a backwash switching cock to separate the pressure of the raw water separated by the filter. A pipe for supplying water to the water supply port side in the tank, and a backwash water discharge port on the side opposite to the water supply port side in the pressure tank.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic pump for pumping ground water, and more particularly to an automatic pump having a filter therein and having a filtered water outlet for filtering and pumping the pumped ground water.

[0002]

[Prior Art]

 Conventionally used automatic pumps consist of a sealed pressure tank and a pump chamber at the top of the tank covered with a cover. The pressure tank has a raw water inlet for pumping groundwater and a raw water outlet for sending the groundwater without filtering it (extracting pressurized water to the outside). The pump room is equipped with a pump, a check valve, and a pressure switch that automatically pump up and send groundwater. The check valve is installed in the middle of the pipe that passes from the raw water inlet through the pressure tank to the pump inlet. The pressure switch is installed in the middle of the pipe from the discharge port of the pump to the pressure tank.

The check valve is provided to prevent negative pressure on the suction port side of the pump when the pump is stopped. If there is no check valve, when the pump is stopped, the water in the piping on the suction side of the pump will return to the underground due to the head difference, and the suction side of the pump will become negative pressure. When negative pressure is reached, even if the pump starts, it will not be able to spin idle and pump up groundwater.

A pressure switch is provided to automatically start or stop the pump. That is, when water is sent from the discharge port of the pump to the pressure tank, the water pressure in the pressure tank rises when the pressure tank is full, and the pump stops when the water pressure rises to the higher set value of the pressure switch. .. Then, by using the water in the pressure tank, the water pressure in the pressure tank drops, and when the water pressure falls to the lower set value of the pressure switch, the pump will restart and deliver water to the pressure tank. When this water supply starts, the water pressure rises and the pump stops for the same reason. The above operation is automatically repeated many times.

When using raw water pumped up by a conventional automatic pump, a water stop valve or a water tap is provided on the raw water feed port side of the pressure tank. For watering and water supply to flush toilets, the raw water is used as it is by opening and closing the stop valve. However, recently, groundwater is often polluted and may need to be filtered. Also, even if the groundwater is not polluted, clean water may be necessary and must be filtered depending on the use. In such cases, filtered water is obtained by installing a filter before or after the stop valve.

[0006]

[Problems to be solved by the device]

 However, if a filter is installed before or after the stop valve, a space equivalent to that is required. Moreover, maintenance of the filter requires a considerable amount of space. Therefore, it is difficult to install a filter in places where it is difficult to obtain space such as the bottom or top of the kitchen sink. Even if a filter is installed, the piping becomes complicated, maintenance of the filter becomes difficult, and treatment of residual water at the time of maintenance becomes a problem. Furthermore, there is a problem that the use of groundwater is expensive because a filter is required for each stop valve.

The present invention has been made in view of such a problem, and it is possible to obtain filtered water by a simple and easy configuration without providing a filter before or after passing the stop valve. The purpose is to provide a possible automatic pump. Another object of this invention is to provide an automatic pump capable of maintaining filtration performance for a long period of time.

[0008]

[Means and Actions for Solving the Problems]

 This device is equipped with a pressure tank having a water supply port, and the raw water that is attached to or attached to this pressure tank is sucked in through a check valve and discharged into the pressure tank. In an automatic pump equipped with a pump that can be taken out of the pressure tank, a filter is installed inside the pressure tank to separate the water supply port from the pressure tank, and a backwash switching cock from the flow path that discharges raw water to the pressure tank. A pipe was provided to supply the raw water to the water supply port side of the pressure tank partitioned by the filter, and a backwash water discharge port was provided on the side opposite to the water supply port side of the pressure tank. It is an automatic pump.

That is, according to this invention, the filter is provided to partition the water supply port from the inside of the pressure tank. Then, a filtered water feed port for feeding the filtered water filtered by the filter is provided on the constituent wall of the pressure tank. Therefore, when using filtered water, a filter is not required on the use side of the filtered water feed port. Specifically, it is sufficient to have a small space from the filtered water inlet to the piping on the side of use, since only a water stop valve is required. This is economical because it does not require a filter for each stop valve, no matter how many places it is used. Further, according to this invention, a pipe for supplying the raw water from the flow path for discharging the raw water to the pressure tank to the water supply port side in the pressure tank partitioned by the filter through the backwash switching cock. Since the backwash water outlet is provided on the opposite side of the pressure tank from the water inlet side, the backwash water outlet is opened, and the backwash switching cock is operated to operate the raw water. If the water is supplied to the water supply port side in the pressure tank, the filter can be backwashed and the filtering function of the filter can be restored, which allows the filter to be used for a long period of time. Here, the backwash switching cock has a first opening / closing valve provided in a flow path for discharging raw water to the pressure tank, and a water supply port side in the pressure tank which is branched from a flow path in front of this opening / closing valve (upstream side). It can be replaced with a second on-off valve provided in the pipe leading to. Of course, when backwashing, the first on-off valve is closed and the second on-off valve is opened. In addition, if a replaceable replacement port for the filter and its cap mechanism are provided on the wall of the pressure tank, it is not possible to reuse the filter after removing the clogged filter after cleaning it. When replacing with a new filter (filter material) at any time, the work is easy and can be done in a short time. Further, when it is desired to use the raw water as it is, the raw water feed port for feeding the raw water may be separately provided on the wall of the pressure tank. Then, either raw water or filtered water can be obtained. If the raw water and the filtered water are used properly, the filter material of the filter will have a long life.

In this invention, the filter divides the water supply port from the inside of the pressure tank means that the raw water supplied from the pump into the pressure tank always passes through the filter when it goes to the water supply port. Means to be done. Specifically, the filter medium of the filter may be divided into a disk-shaped cylinder for the cylindrical pressure tank or covered with a disk-shaped one corresponding to the water inlet, but the area of the filter medium should be large. In order to secure the water supply port, it is preferable to cover the water supply port in a basket shape or in a cylindrical shape by closing one end opening with the side wall of the pressure tank as in the embodiment.

[0011]

【Example】

 The present invention will be described in detail below based on the embodiments shown in the drawings. The invention is not limited to this. FIG. 1 is an assembly front view of an automatic pump according to the present invention, FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIG. 3 is a flow path configuration diagram.

1 to 3, the automatic pump 1 has a cylindrical shape and mainly includes a lower pressure tank 2 and an upper pump chamber 3. The pressure tank 2 has a closed structure and is provided with a filter 4 inside thereof, and on the outer periphery thereof, there are a filtered water feed port 5, a filter material replacement port portion 6, a raw water suction port 7, a raw water feed port 8, and a backwash water discharge port 18. have. The pump chamber 3 is covered with a removable cover 14, and a pump 15, a check valve 16 and a pressure switch 17 are provided inside the cover. As shown in FIG. 2, the filter 4 has a hollow cylindrical mandrel 9 having a large number of holes around it, a hollow cylindrical filter medium 10 fitted on the outer periphery of the mandrel 9, and raw water passing through the filter medium 10. It is composed of a first packing 11 which prevents the core metal 9 from flowing into the core metal 9. The core 9 is connected to the filtered water supply port 5. The mandrel 9 may have a short length sufficient to support one end of the filter medium 10, and in that case, many holes around the mandrel 9 may or may not be provided. Further, the filter medium 10 may be a commercially available product as long as it is suitable for the intended use, and a special filter paper made of a specific fiber (eg, cellulose fiber or glass fiber) treated with a resin or metal powder (aluminum, nickel, etc.). There are cartridge types such as those obtained by sintering alloy powder). The filtered water feed port 5 is a filtered water feed port obtained by filtering raw water with the filter 4. As shown in FIG. 2, the filter medium replacement port portion 6 is a second packing that prevents raw water from flowing into the mandrel 9 without passing through the filter medium 10 and at the same time prevents raw water from leaking out of the pressure tank 2. 12 and the manifold 13. In order to facilitate the maintenance of the filter 4 and to simplify the structure of the filter 4 and the pressure tank 2, the filtered water feed port 5, the filter 4 and the filter medium replacement port 6 are It was set up on a straight line. The raw water suction port 7 is a suction port of raw water which is groundwater. The raw water feed port 8 is a feed port that feeds the raw water accumulated in the pressure tank 2 without filtering. The pump 15 is for pumping raw water and discharging it to the pressure tank 2. The check valve 16 is installed in the middle of the pipe from the raw water suction port 7 through the pressure tank 2 to the suction port 15a of the pump 15. The pressure switch 17 is installed in the middle of the pipe from the discharge port 15b of the pump 15 to the pressure tank 2. Reference numeral 19 is a backwash switching cock provided in the flow path 21 between the pressure switch 17 and the filter 4, and 20 is a bypass between the switching cock and the downstream side of the filter 4. This is bypass piping. Reference numeral 22 in FIG. 1 is a flexible pipe.

The operation of the automatic pump 1 having the above configuration will be described. When the pump 15 is started, raw water is sucked from the raw water suction port 7 in the pressure tank 2, flows through the pipe in the pressure tank 2, passes through the check valve 16, and reaches the suction port 15a of the pump 15. Further, the raw water is discharged from the discharge port 15b, passes through the pressure switch 17, and is discharged to the pressure tank 2. Then, the pressure tank 2 becomes full of water, the water pressure in the pressure tank 2 rises, and becomes the same as the discharge pressure of the pump 15. Since the raw water in the pressure tank 2 has a pressure, it becomes easy to pass through the filter medium 10. Therefore, filtered water can be obtained from the filtered water feed port 5, and raw water can be obtained from the raw water feed port 8. The pump 15 receives the operation of the pressure switch 17 depending on the level of the pressure in the pressure tank 2 and automatically repeats starting or stopping, so that the pressure tank 2 is always filled with water. Next, to backwash the filter 4, the filtered water feed port 5 is closed, the backwash switching cock 19 is operated, and the backwash water discharge port 18 is opened. The raw water passes through the bypass pipe 20 through the backwash switching cock 19 and passes backward from the inside of the filter 4, and is discharged from the backwash water discharge port 18 along with dirt on the outside. In this way, the filtering performance of the filter 4 is restored, and the desired filtered water is continuously obtained.

A procedure for replacing the filter medium 10 of the filter 4 will be described. First, the pump 15 is stopped, and the faucet or the stop valve connected to the filtered water feed port 5 or the raw water feed port 8 is opened, so that the raw water in the pressure tank 2 is discharged to reduce the pressure in the pressure tank 2. Set to 0. Next, after removing the manifold 13 of the filter medium replacement port 6 and taking out the second packing 12, the filter medium 10 is taken out. Then, the new filter medium 10 or the cleaned original filter medium 10 is fitted into the mandrel 9, the second packing 12 is attached, and the manifold 13 is attached. As described above, the replacement of the filter medium 10 can be easily performed in a short time. Unlike the above embodiment, the filter may be a disk-shaped filter 4a that horizontally partitions the inside of the cylindrical pressure tank 2a as shown in FIG. In addition, a flow path 25a that connects the pump chamber 3a and the upper portion of the pressure tank 2a via the open / close valve 23a, and a flow path 26a that connects the pump chamber 3a and the lower portion of the pressure tank 2a via the open / close valve 24a. A backwash channel may be configured. That is, during normal filtration, it is possible to open the on-off valve 23a of the flow path 25a and close the on-off valve 24a and the backwash water discharge port 27a to obtain filtered water from the filtered water outlet 5a, while opening and closing the flow path 26a. By opening the valve 24a and the backwash water outlet 27a and closing the on-off valve 25a and the filtered water outlet 5a, the backwashing of the filter 4a can be performed as in the previous embodiment.

[0015]

[Effect of the device]

 The automatic pump according to the present invention has the following effects. Since a filter is provided inside the pressure tank, filtered water can be obtained without providing a filter outside the pressure tank. Therefore, the space for the filter is not required outside, the piping is simple, and at the same time, the filter is not required for each stop valve, which is economical. Further, maintenance of the filter can be easily carried out in a short time only by operating a valve or a cock such as a backwash switching cock, a filtered water feed port and a backwash water discharge port.

[Brief description of drawings]

FIG. 1 is an assembled front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a flow path configuration diagram.

FIG. 4 is a view corresponding to FIG. 1 showing another embodiment.

[Explanation of symbols]

 1 Automatic Pump 2 Pressure Tank 3 Pump Room 4 Filter 5 Filtered Water Inlet 6 Filter Material Replacement Port 7 Raw Water Suction Port 8 Raw Water Inlet 9 Core Bar 10 Filter Material 14 Cover 15 Pump 16 Check Valve 17 Pressure Switch 18 Reverse Wash water discharge port 19 Backwash switching cock 20 Bypass piping

Claims (1)

[Scope of utility model registration request] 1. A pressure tank having a water supply port, and a raw water attached to or attached to the pressure tank, sucks raw water through a check valve, and discharges the raw water into the pressure tank, whereby pressurized water is externally supplied from the water supply port of the pressure tank. In an automatic pump equipped with a pump that can be taken out of the pressure tank, a filter is installed inside the pressure tank to partition the water supply port from the inside of the pressure tank, and a backwash switching cock is inserted from the flow path for discharging raw water to the pressure tank. An automatic pump with pipes for supplying the raw water to the water inlet side in the pressure tank partitioned by the filter, and a backwash water outlet on the side opposite to the water inlet side in the pressure tank ..