JPH0716053Y2 - Electromagnetic pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an electromagnetic pump used in a liquid combustor for sending fuel from a fuel (oil etc.) tank to a burner in the combustor.

(Prior Art) As shown in Japanese Utility Model Laid-Open No. 60-47885, a conventional electromagnetic pump of this type is provided with a fin-shaped control board for controlling the excitation of the electromagnetic coil on the control board side. It is configured to be attached to the pump body via the protrusions and hooks.

(Problems to be solved by the invention) However, in this conventional electromagnetic pump, since the case accommodating the control board is assembled to the pump main body, the case and the pump main body are engaged with each other for assembly. Since it is necessary to provide a piece or the like, the structure of the pump main body and the case becomes complicated, and there is a problem that the assembly is troublesome.

Therefore, an object of the present invention is to provide an electromagnetic pump having a simple structure and easily assembling a control board.

(Means for Solving the Problem) An electromagnetic pump according to the present invention performs a pumping action in cooperation with the suction side and discharge side check valves 10 and 19 by vertically moving the plunger 7 by exciting the exciting coil 13. The pump main body 2 having connection terminals 14a and 14b for supplying current to the exciting coil 13 and the control circuit for controlling the current to the exciting coil 13 are incorporated, and the circuit terminal 40 for outputting to the exciting coil 13 is provided.
Control board 4 having a and 40b, and storage parts 33 and 34 for partitioning the pump main body 2 and the control board 4 into partition walls 32, respectively.
And a connecting means 30 for connecting the case 5 to the pump body 2, and the connection terminals 14a and 14b protruding from the pump body 2 below the control board 4 and the circuit terminal 40a. 40b is to connect.

(Operation) Therefore, in the present invention, the pump main body 2 and the control board 4 are housed in one common case 5, and the control device can be assembled to the electromagnetic pump simply by connecting the case 5 to the pump main body 2. it can. As a result, there is no need for an engaging means for assembling the case 5 which has been conventionally required in both the pump body 2 and the case 5, and a process for assembling the case 5 in the pump body 2 is also unnecessary.

The control board 4 is a circuit terminal 4 connected to the connection terminals 14a and 14b.
There is an advantage that the lower ends of 0a and 40b are engaged to prevent the case 5 from coming off.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, an electromagnetic pump 1 includes a pump body 2, a control board 4 for controlling driving of the pump of the pump body 2, and the pump body 2 and the control board 4 which are integrated with each other. And a case 5 that covers or stores it.

As shown in FIG. 3, the pump body 2 has a plunger 7 arranged in a cylinder 6 supported by an upper spring 8 and a lower spring 9. A suction side check valve 10 is housed in the plunger 7. An exciting coil 13 is arranged around the cylinder 6 with an upper magnetic pole cylinder 11 and a lower magnetic pole cylinder 12 interposed.

The exciting coil 13 is wound around the bobbin 22, connection terminals 14a, 14b for current supply are provided below, an upper magnetic plate 15 is attached above it, and a lower magnetic plate 16 is attached below it. The lower magnetic plate 16 is pressed by the suction pipe 17, and the upper magnetic plate 15 is pressed by the upper magnetic pole cylinder 11.

The suction pipe 17 has a collar 18 on the upper side, and the cylinder 6
The bottom edge of is inserted.

The discharge nipple 20 is provided by externally fitting the upper magnetic pole cylinder 11 provided above the cylinder 6, and
The upper part of the fitted valve seat 21 is fitted to the upper part of the cylinder 6, and the discharge side check valve 19 is provided therein.

The upper outer magnetic pole plate 23 is formed with an engagement hole 24 into which the discharge nipple 20 is inserted and engaged, and both sides thereof are bent along the outer shape of the exciting coil 13, and further the side portions are outside. The mating piece 25 is formed by bending it to a screw hole 26.

The upper outer magnetic pole plate 23 engages with the discharge nipple 20 and is arranged outside the exciting coil 13, and the lower outer magnetic pole plate 27 engages with the suction pipe 17 so as to sandwich the exciting coil 13. Then, the mating pieces 25 and 28 are aligned with each other and engaged with the screw 30 to assemble the pump body 2. When the screws 30 are connected, the case 5 is also connected together as described below.

In the above structure, the plunger 7 reciprocates in the cylinder 6 by the intermittent current applied to the exciting coil 13 to perform the pumping action. When the plunger 7 moves downward, the check valve 10 on the suction side is opened and the suction pipe 17
When the fuel is sucked from the above through a filter (not shown) and moved upward, the check valve 19 on the discharge side is pushed open, and the fuel is discharged from the discharge nipple 20.

As shown in FIG. 2, the case 5 is integrally molded from a plastic material, and accommodates the main body accommodating portion 33 that accommodates the pump main body 2 from the outside with the partition wall 32 as a boundary, and the control board 4. It has a control board storage section 34.

A hole 35 is formed in the main body storage portion 33 so that the discharge nipple 20 of the pump main body 2 stored in the case 5 penetrates through the fitting hole 35 and projects upward.

In addition, a pair of driver recesses are provided around the main body storage 33.
37 is formed so that the screw 30 inserted through the hole 4b can be easily screwed to the pump body 2.

Guide grooves 38a, 38b for guiding the insertion of the control board 4 are formed in the control board housing 34, and the control board 4 is slidably inserted from below along the guide grooves 38a, 38b. .

On the other hand, the control board 4 includes various electronic components 36 and power terminals 45.
And a pair of circuit terminals 40a and 40b are extended from the control board 4 through the notches 39 and connected to the connection terminals 14a and 14b. . Therefore, the control board 4 is stopped by the connection terminals 14a, 14b, and the control board 4 once stored is guided by the guide grooves 38a,
I can't get out of 38b. Further, in this embodiment, the control board 4 is placed on the cord 41 of the connection terminals 14a and 14b, and is always urged toward the case by the elastic force of the cord itself. It is possible to prevent rattling in and.

Below the case 5, there are a pair of mounting pieces 43 extending outward.
Is formed, and a mounting hole 42 is formed in this,
Combustor (not shown) with a screw through this mounting hole 42
It is designed to be fixed to etc.

With the above configuration, when assembling the electromagnetic pump 1,
The guide groove 38 is provided from the lower side of the case 5 in the control board housing 34.
The control board 4 is inserted along a and 38b, then the pump body 2 is inserted from the lower side of the case 5, and the discharge nipple 20 is projected from the fitting hole 35 and stored. After that, the case 5 is fixed to the pump body 2 together with the upper and lower outer magnetic pole plates 23 and 27 with the screw 30.

Finally, the circuit terminals 40a, 40 extending from the control board 4
Connect b to the connection terminals 14a, 14b of the pump body 2.

According to this embodiment, the electromagnetic pump can be assembled by such a simple process, and it is necessary to form the engaging pieces and the like, which are conventionally required for assembling the pump body, on the pump body 2 and the case 5. Since there is not, it can be a simple configuration.

(Effect of the Invention) According to the present invention, since the electromagnetic pump and the control board are covered with only one case and they are integrally held, they can be easily assembled with a simple structure. An electromagnetic pump can be provided.

Further, since the case covers not only the control board but also the pump body, it is possible to prevent the pump body from being soiled and damaged.

Further, the control board is engaged with the circuit terminal connected to the connection terminal and is prevented from coming off from the case.

[Brief description of drawings]

1 is a perspective view of an electromagnetic pump according to the present invention, FIG. 2 is an exploded perspective view of the electromagnetic pump shown in FIG. 1, and FIG. 3 is an enlarged sectional view of the electromagnetic pump. 1 ... Electromagnetic pump, 2 ... Pump body, 4 ... Control board, 5 ... Case, 30 ... Coupling means.

Claims (1)

[Scope of utility model registration request] 1. A connection terminal for supplying a current to the exciting coil 13, by moving the plunger 7 up and down by exciting the exciting coil 13 and performing a pumping action in cooperation with the check valves 10 and 19 on the suction side and the discharge side. A pump main body 2 having 14a, 14b, a control circuit 4 incorporating a control circuit for controlling a current to the exciting coil 13 and having circuit terminals 40a, 40b for outputting to the exciting coil 13, a pump main body 2 and control A case 5 for accommodating the base 4 and the accommodating portions 33, 34 partitioned by the partition wall 32, and a coupling means for coupling the case 5 to the pump body 2.
30, and the connection terminals 14a, 14b projecting from the pump body 2 below the control board 4 and the circuit terminals 40a, 40b are connected to each other.