WO2003003545A1

WO2003003545A1 - Operation monitor for canned motor

Info

Publication number: WO2003003545A1
Application number: PCT/JP2001/011128
Authority: WO
Inventors: Masaru Abe; Kensuke Ido
Original assignee: Kabushiki Kaisha Teikoku Denki Seisakusyo
Priority date: 2001-06-29
Filing date: 2001-12-19
Publication date: 2003-01-09
Also published as: JP2003018797A

Abstract

A meter unit (45) is provided with a signal processing circuit (26) for processing the output signal from detecting sections (24, 25), and a rectifying circuit (30) of a DC low voltage power supply section (28) for driving the signal processing circuit (26). A control board (22) installed at a place separated from a canned motor (21) is provided with an AC low voltage power supply (32) of the DC low voltage power supply section (28). The rectifying circuit (30) and the AC low voltage power supply (32) are connected through a low voltage feeder line (66). Since the meter unit (45) is reduced in size and provided in a terminal box (38) at a place different from a terminal cover (40), wiring work to the terminal box (38) is facilitated and the same meter unit (45) can be used even if terminal boxes (38) different in size are used.

Description

Ming Can motor operation monitoring device Technical field

The present invention relates to an operation monitoring device for monitoring operation of a canned motor.

Itoda

Background technology

In general, Canadian lamps are mainly used for driving pump stirrers, and are also used for chemical plants, for example. Therefore, high reliability is required.

In the case of a pump with a pump that adopts a pump and a pump, the pump and the pump are integrated so that there is no liquid leakage. However, the state of the inside cannot be monitored visually.

The rotor of a canned motor, which drives the pump impeller to rotate, is almost always supported by a slide bearing lubricated by the pump fluid. However, in order to operate the camcorder effectively, it is necessary to monitor the wear state of the slide bearing from outside.

As a device for detecting the wear of the sliding bearing, for example, as described in Japanese Patent Publication No. Detected by stator at night An operation monitoring device is known that detects the radial and axial wear of the bearing by the signal of the detection coil.

In an operation monitoring device for detecting such bearing wear, the output signal of the detection coil is converted into a signal corresponding to the state of wear of the bearing. The DC power to drive the signal processing circuit and the display unit of the signal processing circuit that is output to the display unit such as a meter and an LED bar graph is obtained from the motor drive power supply. A power transformer and rectification circuit are provided. The signal processing circuit, the indicator, the power supply transformer, and the flow regulating circuit are integrally mounted in a terminal cover formed in a substantially cylindrical shape.

At this point, in this operation monitoring device, it is necessary to wire the motor output power cable to the cable motor and the external output signal line of the operation monitoring device. It is necessary to remove the lid attached to the terminal box, and at that time, the input signal line from the detection coil to the signal processing circuit or the signal from the signal processing circuit must be removed. Remove the output signal line from the terminal board, or leave the terminal not removed so that one person can support the terminal cover by hand and the other person can work on it. There are extremely poor problems

Therefore, in order to solve this problem, for example, there is a proposal described in Japanese Patent Application Publication No. 10-336971.

That is, as shown in FIG. 4 or FIG. A terminal cover 3 to be attached to the terminal box 2 of the unit 1 is formed in a power-up shape, and a signal processing circuit 4 an indicator 5 and a power supply transformer are provided in the terminal cover 3. The terminal cover 3 is connected to the metering case by closing and fixing the plate body 7 by integrally housing the rectifying circuit (not shown) and a rectifying circuit (not shown). Thus, a meter motor 8 of a canned motor operation monitoring device that is also used as a component is configured.

A terminal plate 9 is provided in the terminal box 2 to which the lid 3 is attached, and the terminal plate 9 has an input terminal connected to the signal processing circuit 4 of the meter unit 8. The output signal line 10 is connected, and the motor drive power cable 11 1 is used for wiring work at the site where the cable modem is to be installed. Monitoring the temperature of the winding wire for the evening of the thermometer The drawing of the lead wire 12 and the meter unit 8 of the thermoset for monitoring the abnormal temperature of the winding wire No external output signal lines are connected.

¾ The lid 3 is fastened and fixed to the terminal box 2 by a plurality of bolts 13. Terminal box 2 is provided with terminal cover locking pins 14 erected, and terminal cover 3 is attached to this terminal cover locking pin 14 in the proper mounting state or the back side. It can be engaged in the facing state.

At the time of wiring work at the site, remove the terminal cover 3 from the terminal box 2 and connect the removed terminal cover 3 to the connection state of the input / output signal line 10. It is turned upside down and engaged with the terminal cover fixing pin 14 erected from the terminal box 2, and is held in the terminal box 2. In this state, the terminal board Even if the connection between the I / O signal line 10 and the I / O signal line 10 is not disconnected or the terminal cover 3 is not supported by hand, the motor drive power cable 11 The wiring work of the external output signal line of the lead wire 12 and the menu unit 8 is enabled.

However, the signal processing circuit 4, the indicator 5, the power supply transformer 6, and a rectifying circuit (not shown) are integrally accommodated in the terminal cover 3. Especially in the construction of the operation monitoring device for the Canadian overnight, the power supply 6, which occupies a particularly large volume and mass, is to be accommodated. The menu unit 8 is large and heavy, and there is a problem that the workability of the wiring work when the terminal cover 3 is removed from the terminal box 2 is impaired.

Also, remove the terminal cover 3 from the terminal box 2 so that it faces down and engage with the terminal cover locking pins 14 to hold the terminal cover 2 in the terminal box 2. Is output signal line 10 connected? Since it is in the PTE state, the work is difficult if the input / output signal line 10 is short, and the work becomes easy if the input / output signal line 10 is long. When mounting the cable to the terminal box 2 in a normal condition, the input / output signal wire 10 must be rolled into the terminal box 2 and stored, which is troublesome. At the same time, the input / output signal line 10 may be pinched between the fitting portion of the terminal box 2 and the terminal cover 3, which may cause a malfunction. In addition, care must be taken when connecting wires to the terminal board 9, especially when connecting the thick motor drive power supply cable 11. Route 10 may be cut off Furthermore, if the terminal cover 3 is mistakenly dropped when the terminal cover 3 is held face down on the terminal box 2 or when the terminal cover 3 is assembled in a normal state, the terminal cover 3 may be dropped. There is a possibility that the thin input / output signal line 10 may be disconnected with the mass of the above.

Furthermore, if the size of the terminal box 2 changes according to the capacity of the canned motor 1, the structure and dimensions of the terminal cover 3 also change. In the case of the Canadian Overnight 1, a new explosion-proof test of the terminal cover 3 is required as a room for storing the meter unit 8 separately from the terminal box 2. In addition, it is extremely troublesome and has a problem of high cost.

Such a problem is due to the fact that the meter unit 8 is attached to the terminal cover 3, but the meter unit 8 is large. Since the power transformer 6 with a large capacity is integrated with the terminal box 2, the terminal box 2 is large and the large meter unit 8 is connected to the terminal cover 3. The meter unit 8 is attached to the terminal cover 3 so that there is no room to set it in another place.

The present invention has been made in view of such a point. Therefore, the configuration that can be installed on the canned motor side has been reduced and installed on the canned overnight side. The purpose of the present invention is to provide an operation monitoring device capable of increasing the degree of freedom of a location where the operation is to be performed. Disclosure of the invention The canned motor operation monitoring device of the present invention is installed on the cantilever overnight, and is a detecting unit for detecting the bearing wear state of this canned motor. And a signal processing circuit provided on the side of the cable motor for processing an output signal of the detection unit, and separated from the side of the cable motor. A DC low-voltage power supply unit, which is provided at a location and drives the signal processing circuit, and a low-voltage power supply line that connects the DC low-voltage power supply unit and the signal processing circuit described above. Is what you have

With this configuration, a signal processing circuit for processing the output signal of the detection unit is provided on the side of the cable motor, and is separated from the cable. A DC low-voltage power supply that drives the signal processing circuit is installed in the location where the signal processing circuit is connected.The low-voltage power supply line connects these signal processing circuits to the DC low-voltage power supply. The structure that can be installed on the evening side can be reduced in size, and the freedom of the place where it can be installed on the evening side can be increased. As a result, for example, it is possible to mount the can-monitoring operation monitoring device on the terminal box side without mounting it on the terminal cover as in the conventional case. In addition to simplifying wiring work to the terminal box, even if the size of the terminal box changes according to the capacity of the cable, the same cable is used. The operation monitoring device can be used.

In addition, the monitoring system for the operation mode of the present invention is installed on the side of the operation mode for detecting the bearing wear of the operation mode. The detection unit to be output and the can A signal processing circuit provided on the motor side for processing the output signal of the detection unit; and an AC low circuit provided at a location separated from the cable modem. A voltage supply section, and a rectifying circuit provided on the side of the cable modem for rectifying an alternating low voltage from the alternating current low voltage power section to a direct current low voltage; It has a direct-current low-voltage power supply for driving a signal processing circuit, and a low-voltage power supply line for connecting the AC low-voltage power supply to the rectification circuit.

With this configuration, a signal processing circuit for processing the output signal of the detection unit and a DC low-voltage power supply for driving the signal processing circuit are provided on the cable motor side. Rectification circuits, and the low-voltage power supply section of the direct-current low-voltage power supply section in a place separated from the canned motor, and the rectification circuit and the rectification circuit of these sections. Because the power supply is connected to the power supply with a low-voltage power supply line, the configuration that can be installed on the cable motor side can be reduced in size and can be installed on the cable motor overnight. Can increase the degree of freedom. As a result, for example, it is possible to mount the operation monitoring device on the terminal box on the terminal box side without installing the operation monitoring device on the terminal cover as in the past. In addition, wiring work to the terminal box can be facilitated, and even if the size of the terminal box changes in accordance with the capacity of the cable modem, the same key can be used. An operation monitoring device can be used. However, since AC voltage is applied to the low-voltage power supply line, even if the low-voltage power supply line becomes extremely long and a voltage drop occurs, it is possible to anticipate the voltage drop and exchange current. Set the voltage high As a result, the output voltage of the DC low-voltage power supply does not decrease, and the indicated value error due to the length of the low-voltage power supply line can be reduced.

In addition, according to the present invention, the terminal side of the cable modem has a terminal box, a terminal cover detachably mounted on the terminal box, and a position different from the terminal cover. It is provided with a signal processing circuit and a meter unit having an indicator for indicating an output signal of the signal processing circuit, which is installed in the terminal box. . With this configuration, the wiring work to the terminal box with the terminal cover open and closed can be easily performed without affecting the menu. In addition, the operation status can be monitored at the operation site of the cable motor.

In addition, in the present invention, the indication section for instructing the output signal of the signal processing circuit is provided in a remote place separated from the station. With this configuration, the operation status can be monitored in a place separated from the remote control station.

Further, in the present invention, the signal line for taking out the output signal of the signal processing circuit to the outside and the low-voltage power supply line are provided in one multi-core cable. With this configuration, the number of wires between the canned motor side and the place separated from the canned motor is reduced, and the cable ground is reduced. The number of wires is also reduced, and the cost of wiring materials and wiring work can be reduced. Brief description of the drawing

FIG. 1 is a circuit diagram of a canned motor operation monitoring device showing a first embodiment of the present invention, and FIG. 2 is a circuit diagram of the canned motor operation monitoring device. Fig. 3 is a cross-sectional view of the terminal box to which the terminal device is applied, and Fig. 3 is a plan view of the terminal box to which the terminal cover to which the canned motor operation monitoring device is applied is removed. FIG. 4 is a cross-sectional view of a terminal box to which the conventional monitoring device for a cantilever operation is applied, and FIG. 5 is a cross-sectional view of the conventional box. Fig. 6 is a cross-sectional view of the terminal box to which the overnight operation monitoring device is applied, as viewed from the flat surface side. Fig. 6 shows a terminal box to which the conventional canal operation monitoring device is applied. It is a side view of a cable motor. Best form to carry out the invention

Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1 or FIG.

As shown in FIG. 1, reference numeral 21 denotes a canned motor, and a control panel 22 for controlling the canned motor 21 is a canned motor 2. It is installed in a place separated from the above, and the operation of the canned motor 21 over these canned overnight 21 and the control panel 22 A bearing wear detection device 23 as a candidometer operation monitoring device for monitoring the condition is provided.

The bearing wear detecting device 23 is a radial bearing wear detecting portion 24 serving as a detecting portion composed of a detecting coil and the like. Signal processing circuit that processes the output signals of the bearing wear detection section 25 for radial and axial bearings, the wear detection section 24 for radial bearings, and the wear detection section 25 for axial bearings. 26, an on-site indicator as an indicator for instructing an output signal of the signal processing circuit 26, a direct-current low-voltage power supply 28 for driving the signal processing circuit 26, and signal processing A remote indicator 29 is provided as an indicator for instructing the output signal of the circuit 26.

Out of the configuration of the bearing wear detector 23, the two bearing wear detectors 24 and 25, the signal processing circuit 26, the on-site indicator 27 and the direct current low A rectifying circuit 30 of the voltage power supply section 28 is provided, and the rectifying circuit 30 is provided with a regulator 31 for maintaining a constant direct-current output voltage. On the control panel 22 side, a power supply transformer 32a as an AC low-voltage power supply 32 of the DC low-voltage power supply section 28 and a remote indication section 29 are arranged.

In addition, a liquid level switch 33 for detecting that the liquid to be handled is full and leveling is located at the channel mode evening 21 in the channel mode evening 21. On the control panel 22 side, a motor drive power control circuit 34 that operates based on the detection of the liquid level switch 33 is disposed.

Then, as shown in FIGS. 2 and 3, a terminal plate 37 is formed on a terminal receiving base 36 protruding from a frame 35 of the canned motor 21. Is mounted, and a terminal box 38 is mounted so as to cover the terminal board 37. The terminal box 38 and the terminal board 37 are connected to the terminal receiving base 36 by a plurality of bolts. Fixed at 39 ing . A terminal cover 40 is detachably attached to a plurality of bolts 41 at an upper opening portion of the terminal box 38 and is laid. A wire lead-in portion 42 extends in the horizontal direction of the terminal box 38, and a gas-unit mounting hole 43 drilled on the upper surface of the wire lead-in portion 42 has a gas outlet. A meter unit 45 is mounted via a cable 44, and the meter unit 45 is fastened and fixed to the wire lead-in section 42 by a plurality of bolts 46. ing . With these configurations, the terminal box section of the CANMO 21 is configured.

The meter unit 45 includes a printed circuit board 47 on which the signal processing circuit 26 of the bearing wear detecting device 23 and the rectifying circuit 30 of the DC low-voltage power supply unit 28 are mounted, and an LED. It has a printed circuit board 48 on which a field indicator 27 such as a no-graph is mounted, and a mounting table 50 on which a scale plate 49 is sequentially assembled. In addition, a window case 52 in which a window glass 51 is incorporated in the upper opening is provided. The meter case 52 is covered with the meter base 50, and the meter base 50 and the metal case 52 are fastened and fixed to the bolt 53 by the bolt. The train 45 is configured and ready.

Then, the signal lines 55 of the bearing wear detectors 24 and 25 installed in the stay motor 54 of the cable motor 21 are connected to the signal terminals 56 of the terminal plate 37. The terminal box 38 of the signal terminal 56 is connected to the input side of the signal processing circuit 26 via a signal line 57, and the signal processing circuit 26 is connected to the signal processing circuit 26. The indicator 27 and the rectifier circuit 30 are within the main unit 45. The signal line 58 on the output side of the signal processing circuit 26 is connected to the relay terminal 59 of the terminal plate 37, and the power line 60 of the rectifier circuit 30 is connected to the relay terminal 59 of the terminal plate 37. It is connected . The signal lines 57 and 58 and the power supply line 60 are combined into one multi-core cable 61, and the multi-core cable 61 passes through the It is guided from the tub 45 into the terminal box 38.

Also, a lead wire 62 of the liquid level switch 33 is led through a conduit (not shown) into the terminal box 38 and is connected to the middle terminal 63 of the terminal plate 37. The liquid level switch 33 and the control panel 22 side are connected via a lead wire 64 through the relay terminal 63. Further, the signal processing circuit 26 and the remote indication section 29 are connected via the relay terminal 59 via the signal line 65 and the relay terminal 59 via the relay terminal 59. The rectifier circuit 30 and the secondary side (several volts or tens of volts) of the power supply transformer 32a are connected by a low-voltage power supply line 66. Each signal line 65, low-voltage power supply line 66, and lead line 64 are combined into one multi-core cable 67, and this multi-core cable 67 is an explosion-proof structure. In order to maintain the structure, it is led out of the terminal box 38 to the control panel 22 side by a cable ground 68 or the like.

On the control panel 22 side, a rectifying circuit 69 connected to the secondary side of the power supply transformer 32a as a power supply of the remote indicating section 29 is provided. In addition, the rectifier circuit 69 is also provided with a regulator 70 for maintaining a constant DC output voltage. The power supply R, S, and T of the cable modem 21 are connected to the electromagnetic grounding switch 71 on the control panel 22 side, and the cable ground 73 is connected to the motor power cable 72. It is led into the terminal box 38 while maintaining the explosion proof structure, and is connected to the motor power supply terminal 74.

In addition, when the liquid level switch 33 detects that the handling liquid is not filled in the can-monitor overnight 21 and the candid. When the winding temperature of the motor 21 exceeds the set temperature of the heat sink 75, the electromagnetic switch 71 is turned off to supply power to the sand motor 21. A drive power supply control circuit 34 is installed in the control panel 22. The primary side of the power supply transformer 32a is connected to a power supply circuit. An R.S.T or a dedicated power supply for the control panel 22 is connected so that an AC low voltage of several V to several tens V is supplied to the secondary side. The lead wire 76 of the thermostat 75 is led from the terminal box 38 to the control panel 22 side by a cable ground 77 or the like.

According to the bearing wear detecting device 23 configured as described above, the signal processing circuit 26, the field indicator 27 and the remote location of the bearing wear detecting device 23 are provided. A DC low-voltage power supply unit 28 having a power supply transformer 32a as an AC low-voltage power supply 32 and rectifying circuits 30 and 69 for driving the indicator 29. That is, among the electric elements of the bearing wear detection device 23, the power supply 32a, which occupies an extremely large volume, is controlled away from the candomo evening 21. Since it is installed on the panel 22 side, the power supply transformer 32a is connected to the inside of the meter unit 45 as in the conventional example. There is no need to store it in

Therefore, the size of the menu unit 45 can be reduced, and the menu unit 45 can be attached to the wire inlet 42 of the terminal box 38 by mounting the menu unit. Since the terminal box 38 can be attached to the hole 43, the same meter unit 45 can be used even if the dimensions of the terminal box 38 are changed. Accordingly, as in the conventional example in which the meter unit 45 is integrally provided with the terminal cover 40, the dimensions of the terminal box 38 are changed according to the capacity of the canned motor 21. The structure and dimensions of the terminal cover 40 that constitutes the meter unit 45 each time it changes, there is no need to change the structure or the new explosion-proof test. It is a target.

Also, the work of connecting the motor power cable 72 and the multi-core cable 67 of the bearing wear detection device 23 to the terminal plate 37 is performed by connecting the bearing to the terminal cover 40 as in the conventional example. Since the power line 60 and the signal lines 57 and 58 of the wear detection device 23 are not connected, remove the terminal cover 40 and turn the terminal box 38 so that it faces down. There is no need to hold it with a lid locking pin, so that the terminal cover 40 can be easily attached and detached, and the power line 60 and the signal lines 57 and 58 of the bearing wear detection device 23 can be easily attached and detached. There is no danger of intrusion or cutting.

In addition, since the rectifying circuits 30 and 69 are provided with the regulators 31 and 70 for keeping the DC output voltage constant, the cascading power supplies R and S are provided. Even if the voltage fluctuation of T occurs, the voltage of the DC low-voltage power supply that drives the signal processing circuit 26, the field indicator 27, and the remote indicator 29 is kept constant, The reading can be prevented from fluctuating.

Also, even if the low voltage power supply line 66 becomes extremely long and a voltage drop occurs, the AC voltage should be set high in anticipation of the voltage drop, and the cap should be set. The output voltage of the direct current low voltage on the side of the motor 21 does not drop, and it is possible to prevent the reading value error caused by the length of the low voltage power supply line 66 from occurring. In the above embodiment, the power supply transformer 32a of the DC low-voltage power supply unit 28 is provided on the control panel 22 side, and the rectifier circuit 30 is provided in the meter unit 45. Then, the AC low voltage from the power supply transformer 32a was applied to the rectifier circuit 30 through the low voltage power supply line 66, but the rectifier circuit 30 was connected to the power supply transformer 32a. It may be installed on the control panel 22 side together. However, in this case, if the low-voltage power supply line 66 becomes extremely long, the direct-current low-voltage applied to the signal processing circuit 26 and the on-site indicator 27 decreases due to the voltage drop. It is preferable that the low-voltage power supply line 66 be short because there is a risk of causing an error in the wear indication value.

Further, in the above embodiment, the lead wire 62 of the liquid level switch 33 was inserted into the terminal box 38 by the bow I and then led to the control panel 22 side. The thermostat 75 may be combined with the lead wire 76 of the moss sunset 75 via a wire junction box not shown in a multi-core cable. It is also possible to combine the lead wire 76 with the signal line 65 and the low-voltage power supply line 66 to form a multi-core cable 67.

Either the on-site instruction unit 27 or the remote instruction unit 29 The indicator 27 and 29 need not be provided if an alarm device is installed or if an alarm device is installed.

Possibility of industrial use

The configuration of the canned motor operation monitoring device of the present invention can be miniaturized at the candomo night side, so that it can be installed at the candomo night side. Due to the high degree of freedom, the same monitoring of the operation of various terminal boxes with different sizes according to the capacity of the The device can be applied.

Claims

The scope of the claims

1. A detection unit, which is provided on the side of the camera and detects a wear state of the bearing of the camera,

A signal processing circuit that is provided on the side of the cable monitor and processes an output signal of the detection unit;

A DC low-voltage power supply unit that is provided at a location separated from the side of the cable motor and drives the signal processing circuit;

A low-voltage power supply line connecting the direct-current low-voltage power supply unit and the signal processing circuit;

An operation monitoring device for a candidometer, characterized in that it is equipped with a relay.

2. A detection unit, which is installed on the side of the cantilever for detecting the abrasion state of the cantilever, includes:

A signal processing circuit that is provided on the side of the cable modem and processes an output signal of the detection unit;

An AC low-voltage power supply installed in a place separated from the above-mentioned cable motor and an AC low-voltage power supply installed on the side of the above-mentioned cable motor A DC low-voltage power supply unit having a rectifying circuit for rectifying an AC low voltage from the power supply unit to a DC low voltage, and driving the signal processing circuit;

A low-voltage power supply line connecting the AC low-voltage power supply unit and the rectifying circuit;

The feature of this model is that it is equipped with Operation monitoring device.

3. The terminal side of the cable modem has a terminal box, a terminal cover detachably mounted on this terminal box, and a terminal box installed at a different position from this terminal cover. It has a signal processing circuit and a unit having a display unit for indicating an output signal of the signal processing circuit.

The monitoring apparatus for the operation of a canned motor according to claim 1 or 2, which is characterized by this feature.

4. An indicator for indicating the output signal of the signal processing circuit was installed in a remote place separated from the canned motor.

The can-monitor operation monitoring device according to any one of claims 1 to 3, which is characterized by the claims.

5. Claims characterized in that the signal line for taking out the output signal of the signal processing circuit to the outside and the low-voltage power supply line are provided on one multi-core cable. The monitor for monitoring the operation of a cable motor according to any one of items 1 to 4.