JPS6229676Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a pump with a flow rate switch used, for example, in an automatic water supply device.

[Conventional technology]

Conventionally, this type of pump has been constructed as shown in FIG. 1, for example. That is, a is a pump casing, and inside this pump casing a is a pump chamber p that accommodates a rotating vane (not shown).
is formed, and a gas-liquid separation chamber k in which the liquid discharged from the pump chamber p is temporarily retained.
is formed. The liquid separated in the gas-liquid separation chamber k is discharged through a discharge port b opened in the upper part of the pump casing a so as to communicate with the gas-liquid separation chamber k.
It is discharged through. Therefore, when a flow rate switch is used to control the start and stop of the pump, the flow rate switch must be operated according to the trend of the liquid discharged from the discharge port b. A flow rate switch body c is connected to the flow rate switch body c through which all of the liquid discharged from the discharge port b flows, and this flow rate switch body c is provided with a discharge passage d through which all of the liquid discharged from the discharge port b passes. . This flow rate switch body c is located within the discharge flow path d, and this discharge flow path d is located within the discharge flow path d.
A float h is attached which is operated according to the movement of the liquid, that is, the flow rate, and a reed switch i is provided which is operated according to the movement of the float h.

In a pump with such a configuration, all of the liquid separated from the gas in the gas-liquid separation chamber k passes through the discharge channel d of the flow rate switch body c, and the float h changes depending on the flow rate in this channel d. Therefore, the flow rate can be detected with high accuracy. Furthermore, if the float h and the reed switch i are attached to the flow rate switch body c in advance, they can be attached to the pump casing a simply by connecting the flow rate switch body c to the discharge port b, making the installation work easy. .

By the way, the inlet f of the discharge pipe e is connected to the downstream side of the flow rate switch body c, but depending on the external shape of the pump, the discharge direction, and other conditions, the discharge pipe e may be connected to the downstream side as shown in Fig. 1. There are times when you want to guide it downward.

[Problem that the invention attempts to solve]

However, in the conventional case, the discharge pipe e and the flow rate switch body c are connected to the pump casing a, respectively.
Since the discharge pipe e is fixed to the pump casing a using bolts g, it is necessary to assemble each other independently, which not only requires a large number of parts but also complicates the structure. , the assembly work is time-consuming and is a factor leading to high costs.

This invention was developed based on the above circumstances, and its purpose is to provide a pump with a flow rate switch that has a simple structure, can reduce the number of parts, is easy to assemble, and can contribute to lower costs. .

[Means for solving the problem]

This idea forms the discharge pipe integrally with the pump casing, opens the inlet of the discharge pipe in line with the discharge port connected to the gas-liquid separation chamber, and straddles both the discharge port and the inlet. , and is covered with a flow rate switch body which has a flow path that connects these two to each other and has a float and a reed switch attached thereto.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 2 to 5. In FIG. 2, 1 indicates a pump with a flow rate switch, and 2 indicates a pump casing. Inside the pump casing 2 is formed a pump chamber 17 in which a rotary vane driven by a motor (not shown) is housed. , this pump chamber 17
is in communication with a suction flange 3 provided on one side of the pump casing 2. The discharge side of the pump chamber 17 is communicated with a gas-liquid separation chamber 18 formed in the upper part of the pump casing 2 . Further, the upper part of the pump casing 2 communicates with the gas-liquid separation chamber 18 . Further, a discharge port 4 is formed in the upper part of the pump casing 2. Alongside this discharge port 4, a discharge pipe 6 having an inlet 5 opened on the same plane is formed integrally with the pump casing 2. 7 is a discharge flange, 8 is a priming cap, and 9 is a check valve.

Then, a flow rate switch body 10 that simultaneously covers both the openings of the discharge port 4 and the inflow port 5 is attached to the screw 1.
1... is fixed to the pump casing 2 by... The flow rate switch body 10 has a flow passage 12 formed therein for communicating the discharge port 4 and the inlet port 5 with each other. Further, inside the flow rate switch body 10, a cylindrical float guide body 13 is provided vertically protruding from the discharge port 4 portion. A float 15 having a magnet 14 is provided on the float guide body 13 so as to be movable up and down. The float 15 is pushed up by the fluid pressure when the flow rate of the fluid flowing through the discharge port 4 reaches a predetermined value. Reference numeral 16 is a stop ring that regulates the lower limit position of the float 15.

Further, a reed switch 20 is housed inside the float guide body 13. This reed switch 20 is turned on and off by the magnetic force of the magnet 14 of the float 15, and is turned on when the float 15 is in the raised position, as shown by the two-dot chain line in FIG. I'm starting to do that. 21 is a conducting wire of the reed switch 20. The flow rate switch body 10, float guide body 13, float 15, reed switch 20, etc. constitute a flow rate switch unit 22.

The pump 1 with a flow rate switch constructed as described above is used, for example, in an automatic water supply device as shown in FIG. 4. FIG. 5 shows an outline of the electric circuit of this automatic water supply device. That is, 23 is a pressure tank, 24 is a pressure switch, 25 is a water source, 26 is a relay, and 27 is a pump drive motor. When the internal pressure of the pressure tank 24 decreases, the pressure switch 24 is turned on and the pump 1 is started. After starting the pump, when a predetermined flow rate is reached, the reed switch 20 is turned on. Therefore, water supply continues, and when the operating water amount falls below a predetermined value, the reed switch 20 is turned off and the pump 1 is stopped.

According to the pump 1 with a flow rate switch configured as described above, the discharge pipe 6 is formed integrally with the pump casing 2, and the inlet 5 of the discharge pipe 6 is formed integrally with the pump casing 2.
Since the inlet port 5 and the outlet port 4 of the pump casing 2 are opened on the same plane, the inlet port 5 and the outlet port 4 of the pump casing 2 are opened on the same plane.
The flow rate switch unit 2 can be easily installed by simply placing the flow rate switch body 10 on top and fixing it.
Two parts can be assembled. In addition, the above pump 1
According to this method, since the number of connecting points between parts is greatly reduced compared to the conventional one shown in FIG. 1, the structure is simplified, and this is extremely effective in facilitating assembly and reducing the number of parts.

[Effect of idea]

As explained above, this idea includes integrally forming a discharge pipe with an inlet opening in line with the discharge opening of the pump casing, and
By covering the discharge port and the inlet with a flow rate switch body, the discharge port and the inlet are communicated with each other through a flow path formed in the flow rate switch body. Therefore, the structure is simpler and the number of parts is reduced compared to the conventional system in which the discharge pipe is provided separately from the pump casing. In addition, since the flow rate switch body equipped with such a flow path is integrated with a float guide body, a float, a reed switch, etc. to form a unit, simply assembling this flow rate switch unit to the pump casing connects the above-mentioned discharge port and flow. It is possible to provide a pump with a flow rate switch that can be connected at the inlet and therefore is easy to assemble and is low cost.

[Brief explanation of the drawing]

FIG. 1 is a side view partially showing a conventional pump with a flow rate switch, FIGS. 2 to 5 show an embodiment of this invention, and FIG. 3 is a bottom view of the flow rate switch unit viewed from the - line direction in FIG. 2, FIG. 4 is a schematic diagram showing an example of an automatic water supply device, and FIG. 5 is a circuit diagram of the same water supply device. 1...Pump with flow rate switch, 2...Pump casing, 4...Discharge port, 5...Inflow port, 6...
Discharge pipe, 10...Flow rate switch body, 12...
Flow path, 13... Float guide body, 18... Gas-liquid separation chamber, 20... Reed switch, 22... Flow rate switch unit.

Claims (1)

[Scope of utility model registration request] a pump casing having a gas-liquid separation chamber formed therein; a discharge port that is opened at the top of the gas-liquid separation chamber in the pump casing and discharges the liquid separated in the gas-liquid separation chamber; A discharge pipe is formed and has an inlet opening in line with the discharge port, and a flow path that covers both the discharge port and the inflow port and has a flow passage formed therein to communicate the discharge port and the inflow port with each other. a switch body, a float guide body vertically protruding from the discharge port inside the flow rate switch body, a float provided on the float guide body so as to be movable up and down, and a float built in the float guide body and mounted on the float guide body; A pump with a flow rate switch, characterized in that it is equipped with a reed switch that operates according to the position of the reed switch.