JPH0333193Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Purpose The present invention relates to a phase detection device for an electric motor, particularly a phase detection device for a motor in a submersible electric pump.

Conventionally, a specially made phase detector has been used to check the phase of an electric motor. In the conventional phase detector, three lead wires with designated phases are led out from the main body of the phase detector, and the ends of these lead wires are connected to the detected part with a clip each time a detection is performed. This method detects the phase sequence and removes the lead wire from the detected part each time the detection is completed, which is very inconvenient in use and has the disadvantage that it is not suitable for constantly monitoring the phase sequence of the motor. are doing.

The purpose of the present invention is to provide a phase inspection device that is convenient to use, constantly displays the operating status of the motor, and allows the phase sequence to be clearly seen, eliminating the above-mentioned inconveniences in use. It is in.

(2) Configuration In the phase detection device for an electric motor according to the present invention, a cable led out from the electric motor side and connected to the power supply board, and a required number of grooves into which the dividing line of the cable is inserted are provided in parallel. a support body, a cable insertion ring provided at one end of the support body, a contact body having a required number of protrusions arranged in parallel to face the support body and fit into the groove thereof, the support body and the above-mentioned A closing mechanism is attached to the outside of the clamping body that becomes one when the clamping body is closed, and each of the clamping bodies is inserted into the core wire of each cable split wire that is clamped when the clamping body is closed. It is composed of a conductive needle installed on a protruding strip, and a signal light in which the conductive needle is electrically connected to a predetermined circuit.

To explain the drawings of the embodiment, 1 is a cable led out from an electric pump and connected to a power supply panel, 2 is a clamping body that clamps the vicinity of the leading end of the cable 1, and the parting line of the cable 1 is 1a
A support body 2a having a required number of concave grooves 3a...3a recessed in parallel into which the...1a are inserted, and a required number of protrusions 3b that face the support body 2a and fit into the concave grooves 3a...3a. 3b are integrally formed by closing with the contact body 2b which is provided in parallel in a protruding manner. Each of the protrusions 3b...3b of the contact body 2b has a conductive needle 4 inserted into the core wire of each cable split wire 1a...1a held in the grooves 3a...3a when the clamping body 2 is closed. ... 4 and electrically connect the conductive needles 4...4 to the circuit of the signal light 5 buried in the contact body 2b, the cable dividing line 1a is inserted through the conductive needles 4...4. ...The connection state of 1a, that is, the rotational state of the electric motor, is displayed so as to be visible from the outside (outer peripheral surface a or outer end surface b) of the contact body 2b. Therefore, the signal light 5 is 5a, 5b
It is desirable to have two lights. Reference numeral 6 denotes a closing mechanism attached to the outside of the clamping body 2, and as shown in FIG. 1, for example, as shown in FIG. or by pressing the clamping tools 6b and 6b between the two opposing members 2a and 2b as shown in FIG. As shown in FIG. 3, screws 6c, 6c may be screwed in. In short,
It is sufficient that the closing surfaces between the two members 2a and 2b constituting the clamping body 2 are fixed in a closed state. 7
8 is a cable insertion ring that is installed concentrically with the groove 3a in the center immediately below the groove 3a when the clamping body 2 is closed; This is the ground wire outlet.

When the detection device of the present invention is attached to an electric motor, the sheath of the cable 1 is inserted into the cable insertion ring 7 near the leading end of the cable 1 led out from the motor, and the ground wire 1b is inserted into the ground wire outlet 8. From each cable dividing line 1
After inserting the protrusions 3b...3b into the grooves 3a...3a in parallel, the grooves 3a...3a are inserted into the grooves 3a...3a.
The conductive needles 4...4 are inserted into the cables by fixing the closing surfaces of the abutting body 2b and the support body 2a, and pressing the cable dividing lines 1a...1a with the protrusions 3b...3b. Parting line 1a...1
Insert it into the core wire a. And each groove 3a...3a
The remaining ends 1'a...1'a of the cable splitting lines 1a...1a led out from the cables are connected to the power supply panel.

When the electric motor rotates forward, one signal light 5a
lights up and rotates in reverse, the other signal light 5b
For example, if one signal light 5a is displayed in blue and the other signal light is displayed in red, the operating state of the motor can be easily determined visually.
Also, if one of the lead wires is disconnected, both signal lights will light up at the same time.

(3) Effects For electric motors equipped with the device of the present invention, phase detection can be performed immediately without the need for a separate meter. In addition, the device of the present invention can be always attached near the leading end of the cable 1 led out from the electric motor with the sheathed part of the cable 1 held in the cable insertion ring 7, and can be used for phase detection. This can be done by the visual display of the signal light 5, so it is possible to constantly monitor the energization status of the motor and the phase sequence, and when multiple electric pumps are being operated, it is possible to perform alternating operation. Even in such cases, the operating status can be clearly understood. Furthermore, even if it becomes necessary to change the power supply panel, it can be easily done by simply connecting the dividing lines 1a...1a at the ends of the cables to another power supply panel.

[Brief explanation of the drawing]

A in FIGS. 1 and 2 is a perspective view showing the divided state of the clamping body in the device of the present invention, B in FIGS. 1 and 2 is a plan view of the same, and C in FIGS. 1 and 2.
FIG. 3 is a perspective view showing the clamping state of the device of the present invention, and FIG. 4 is an example of an electric circuit diagram of the device of the present invention. 1...Cable, 1a...Cable dividing line, 2
... clamping body, 2a... support body, 2b... abutting body,
3a...concave groove, 3b...convex strip, 4...conducting needle, 5
... Signal light, 6... Closing mechanism, 7... Cable insertion ring.

Claims (1)

[Scope of Claim for Utility Model Registration] A cable 1 led out from the electric motor side and connected to the power supply panel, and a required number of grooves 3a...3a into which the dividing lines 1a...1a of the cable 1 are inserted are recessed in parallel. a support body 2a; a cable insertion ring 7 provided at one end of the support body 2a; and grooves 3a...3a thereof facing the support body 2a.
A contacting body 2b having a required number of convex strips 3b...3b protrudingly provided in parallel to fit into the inside, and attached to the outside of the clamping body 2 which becomes one body by closing the support body 2a and the abutment body 2b. A closing mechanism 6, a conductive needle 4 implanted in each protrusion 3b...3b of the contact body 2b so as to be inserted into the core wire of each cable split wire 1a...1a held when the clamping body 2 is closed. ...4. A signal light 5 in which the conduction needles 4...4 are electrically connected to a predetermined circuit. A phase detection device for an electric motor.