JP2802524B2 - Pump device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump device that includes a flow switch at a discharge port of a pump unit and controls operation.

[Prior Art] In a pump device that controls the operation by providing a flow rate switch at a discharge port of a pump unit, control tends to be difficult when the ratio between the maximum water amount and the minimum water amount increases.

That is, if the configuration is such that the flow resistance does not occur when the flow rate is large, the operation sensitivity of the flow switch cannot be sufficiently obtained with the small flow rate.

This means that, in the case of a flow switch that operates according to a change in the flow rate, in order to reduce the minimum flow rate to operate, the influence on the flow path must be increased so that the operation element of the flow switch operates with the minimum flow rate.

Then, when the minimum water amount is reduced, a problem arises in that the water flow resistance is caused by the influence of the flow rate switch when the water amount is large.

In the part of the structure through which a large amount of water passes, the sensitivity of the flow switch cannot be easily obtained sufficiently. Have been tried to.

In this case, the flow resistance can be reduced by increasing the inner diameter of the bypass, and the sensitivity of the flow switch can be arbitrarily set by the pressure of the resistance valve.

[Problems to be Solved by the Invention] However, unless the two flow paths are integrated, the structure becomes complicated and assembly is not easy. However, when the two flow paths are integrally formed by casting or the like, the mold becomes complicated and casting is not easy.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a pump device having a structure in which a flow switch integrally including a bypass is easily manufactured in relation to a pump unit.

[Means for Solving the Problems] The present invention relates to a pump apparatus in which an opening of a switch body is directly connected to a discharge port of a pump section and a flow rate switch and a pressure switch are attached to the switch body. A first flow path that is a main flow path and a second flow path that is a bypass flow path are formed inside the first flow path, and the first flow path is a water supply port provided at one flow path end. A first opening, a second opening provided in the middle of the flow path for mounting a flow switch, a third opening provided at the other flow path end and directly connected to the pump section, and a fourth mounting the check valve. An opening is formed, a fifth opening that joins with the first opening provided at one end of the flow passage, and a pressure switch provided in the middle of the flow passage are attached to the second flow passage. Sixth
The problem is solved by forming an opening, a seventh opening provided at the other flow path end and directly connected to the pump section, and an eighth opening for mounting the resistance valve.

[Operation] The water flow discharged from the discharge port of the pump section is split from the two openings and flows through the first flow path and the second flow path of the switch body.

A flow switch is formed in the first flow path, and the switch responds to the water flow.

The second flow path is a bypass provided with a resistance valve, and a part of the water flowing through the second flow path is diverted to the first flow path because a pressure difference is generated by the resistance valve. Will be.

Since the water flow diverted to the first flow path is proportional to the pressure generated by the resistance of the resistance valve, the cross-sectional area of the second flow path is increased so that the large water flow passes therethrough. By setting the resistance of the valve so that the required amount of water flows into the first flow path, the amount of operating water of the flow switch can be arbitrarily obtained.

Although such a switch body includes the first flow path and the second flow path, two openings of the pump section are formed and combined with each other.
This facilitates the production of the flow path.

[Embodiment] The present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 is an exploded view showing a structure of a pump device according to an embodiment of the present invention, and FIG. FIG. 2 is a plan view of a switch body.

In FIG. 1, the solid line connecting the parts indicates the direction of assembly, and the pump device is provided with two openings 2 and 3 at the upper part of the pump unit 1. The openings 2 and 3 respectively form discharge ports communicating with each other inside the pump unit 1.

And the pump part 1 is provided with the motor 4 in the rear part,
It is connected to an impeller (not shown) inside the pump unit 1.

Further, a water inlet 5 is formed at a front portion of the pump unit 1 and communicates with a water source such as a well by a pipe (not shown).

Further, the water inlet 5 is provided with a flange 6 and a packing 7 assembled in the direction of the solid line in the figure.

A switch body 8 is configured to be attached to the upper openings 2 and 3.
The first flow path 9 and the second flow path 9 are opposed to the openings 2 and 3, respectively.
A flow path switch 11 is formed in the first flow path 9, and a bypass is formed in the second flow path 10 via a resistance valve (not shown).

The first flow path 9 and the second flow path 10 are configured so that check valves 12 and 13 can be assembled along the solid lines in the drawing, respectively.

The check valves 12 and 13 are respectively assembled via packing or the like, and the check valve 13 provided in the second flow path 10 is provided with a spring 15 on a valve rod 14 to form a resistance valve. It is configured to be.

Packing 16 is installed in the water outlet of switch body 8.
Is provided with a flange 17 attached via
It is configured to communicate with a terminal such as a faucet.

The second flow path 10 is configured so that a pressure switch 18 is attached thereto.

In FIG. 2, the switch body 8 includes a first flow path 9.
And a second flow path 10 are formed, each having a flange
It is configured to join at the 17 point.

The first flow path 9 and the second flow path 10 are provided with check valves 12 and 13, respectively.

The check valves 12 and 13 can be composed of the same parts, respectively.
The valve stem 14 of the second flow path 10 is further provided with a spring 15 to form a resistance valve.

In such a configuration, the pump device is pumped up when the pump unit 1 is driven by the motor 4, whereby
Pressure water is discharged from the openings 2 and 3 which are discharge ports.

The first and second flow paths 9 and 10 of the switch body 8 are connected to the openings 2 and 3 respectively, and are separated.

Further, when the diverted discharge water flows through the second flow path 10, the flow switch 11 that divides the discharge water into the first flow path 9 according to the resistance valve of the resistance valve by the check valve 13 operates. Let it.

The flow switch 11 sends a signal to a control circuit (not shown), and the motor 4 is controlled to operate.

In such a configuration, since the two openings 9 and 10 are formed in the pump section 1, the manufacture of the switch body 8 can be simplified.

That is, although two flow paths of the first flow path 9 and the second flow path 10 of the switch body 8 are formed, the flow path on the flange 17 side becomes one, and the flow path on the pump section 1 side is formed. Becomes two.

By making the switch body 8 have such a structure, casting by casting becomes easy.

[Effects of the Invention] According to the present invention, since a discharge port having two openings is formed in the pump section to divide the flow into the switch body, the manufacture of the switch body is facilitated, and the operation of the flow switch is improved. The effect is extremely large, such as being stable and compact, and facilitating piping during assembly and installation.

[Brief description of the drawings]

FIG. 1 is an exploded view showing a structure of a pump device according to an embodiment of the present invention, and FIG. 2 is a plan view of a switch body. 1 ... pump section, 2, 3 ... opening, 14 ... motor, 5 ...
… Water inlet, 8… switch body, 9… first flow path,
10 ... second flow path, 11 ... flow rate switch, 12, 13 ... check valve.

Claims (1)

(57) [Claims] 1. A pump device in which an opening of a switch body is directly connected to a discharge port of a pump unit, and a flow switch and a pressure switch are attached to the switch body. A first flow path and a second flow path which is a bypass flow path, wherein the first flow path has a first opening which is a water supply port provided at one flow path end; A second opening for mounting a flow switch provided in the middle, a third opening provided at the other end of the flow path and directly connected to the pump unit, and a fourth opening for mounting a check valve; A fifth opening which joins the first opening provided at one end of the flow passage, a sixth opening which is provided with a pressure switch provided in the middle of the flow passage, and a second flow passage. A seventh opening provided at the road end and directly connected to the pump section, and an eighth opening for mounting a resistance valve. Device formed with a part