Three-phase phase sequence indicator with water leakage alarm circuit

Abstract

The utility model relates to a three-phase phase sequence indicator with a water leakage alarm circuit. The three-phase phase sequence indicator comprises an RC network, a rectification circuit, a filter circuit, an indication circuit and the water leakage alarm circuit which are connected in sequence. The RC network is connected with A, B and C phases of a three-phase power supply; the indicating circuit comprises a voltage stabilizing tube DZ1, a resistor R3 and a light emitting diode LED0 which are connected in series; the indicating circuit is connected with the filter circuit in parallel; the water leakage alarm circuit comprises a light-emitting diode LED1, a current-limiting resistor R5 and a triode which are connected in series, and the water leakage alarm circuit is connected with the light-emitting diode LED0 in parallel; and two output ends of the water leakage alarm circuit are used as detection probes. Compared with the prior art, the oil pump junction box completely adopts surface-mounted elements, is firm in welding, reduces electromagnetic interference, is additionally provided with a water leakage alarm device, and aims to avoid rainwater leakage and the like caused by untight sealing due to misoperation or aging of a sealing strip of the oil pump junction box and other reasons when the junction box is sealed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to phase sequence indicator technical field relates to a three -phase phase sequence indicator based on water leakage alarm circuit. BACKGROUND

[0002] At present, the products such as vertical ring high intensity magnetic separator, water filter and oil cooling de-ironer mostly use oil-water cooler, at this time, the motor and pump components connected therewith are particularly important, if the motor reverses to drive the oil to flow reversely, it can cause the pump to have abnormal sound, low flow, high lift and equipment operation not smooth, based on this, the phase sequence indicator is installed in the oil pump to distinguish the phase sequence of three-phase power supply and avoid the above-mentioned situation.

[0003] The phase sequence indicator is a device for detecting whether the phase sequence of three-phase alternating current circuit and control cabinet and oil pump connection is correct, the prior art cannot detect whether the terminal box leaks water and other changes, therefore, when the terminal box cover is sealed due to operation error, rainwater leakage and other conditions caused by oil pump terminal box sealing strip aging and other reasons can cause circuit short circuit, when the short circuit current is too large, it can cause serious damage to the equipment circuit, and in serious cases, it can cause fire and other safety accidents. In addition, especially for the magnetic separation equipment, a strong electromagnetic field can be generated during operation, causing strong electromagnetic interference around the equipment, making the voltage of the existing phase sequence indicator unstable, causing the diode to be weakly bright instead of not bright when the phase is wrong or missing, which can easily mislead the field wiring personnel. UTILITARIAN CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a three -phase phase sequence indicator with water leakage alarm circuit, solves the problems that the existing phase sequence indicator cannot detect water leakage and has strong electromagnetic interference, the diode and other elements are changed to patch type in the utility model to reduce electromagnetic interference, and a water leakage alarm circuit is added in the phase sequence indicator to avoid the rainwater leakage caused by incomplete sealing due to misoperation of the previous oil pump terminal box or aging of the sealing strip due to long service life of the oil pump in the humid environment.

[0005] The utility model discloses a three -phase phase sequence indicator with water leakage alarm circuit, which comprises a RC network, a rectifier circuit, a filter circuit, an indication circuit and a water leakage alarm circuit connected in sequence.

[0006] The indication circuit comprises a stabilizing tube DZ1, a resistor R3 and a light emitting diode LED0 connected in series, and the indication circuit is connected in parallel with the filter circuit.

[0007] The water leakage alarm circuit comprises a light emitting diode (LED1), a current limiting resistor (R5) and a triode connected in series, and the water leakage alarm circuit is connected in parallel with a light emitting diode (LED0); two output ends of the water leakage alarm circuit serve as detection probes.

[0008] The RC network comprises a resistor (R1), a resistor (R2), a capacitor (C1), a capacitor (C2) and a capacitor (C3).

[0009] One end of the resistor (R1) is connected with phase A, and the other end thereof is connected with phase C through the resistor (R2) and serves as a first output end of the RC network and is connected with a rectifier circuit; the first output end of the RC network is connected with phase C through the capacitor (C3); one end of the capacitor (C1) is connected with phase B, and the other end thereof is connected with phase C through the capacitor (C2); a joint of the capacitor (C1) and the capacitor (C2) serves as a second output end of the RC network and is connected with the rectifier circuit.

[0010] The rectifier circuit adopts a bridge rectifier circuit, two input ends of which are connected with the first output end and the second output end of the RC network respectively; two output ends of the rectifier circuit are connected with a filter circuit.

[0011] The filter circuit comprises a resistor (R4) and a capacitor (C4) connected in parallel.

[0012] The indication circuit is connected with the cathode of a stabilizing valve (DZ1) and one end of a resistor (R3), and the other end of the resistor (R3) is connected with the cathode of a light emitting diode (LED0).

[0013] The water leakage alarm circuit is connected with the anode of the light emitting diode (LED1) as a first output end of the water leakage alarm circuit, the cathode of the light emitting diode (LED1) is connected with the collector of a triode through a current limiting resistor (R5), the base of the triode serves as a second output end of the water leakage alarm circuit, and the emitter of the triode is connected with the cathode of the light emitting diode (LED0).

[0014] The two output ends of the water leakage alarm circuit are connected with lead wires respectively as detection probes; the lead wires are Teflon wires or RAK wires.

[0015] The light emitting diode (LED0) and the light emitting diode (LED1) are all reverse-mounted light emitting diodes.

[0016] The RC network, the rectifier circuit, the filter circuit, the indication circuit and the water leakage alarm circuit are arranged on a circuit board, and an outer shell is arranged outside the circuit board.

[0017] The outer shell is provided with a display window corresponding to the light emitting diode (LED0) and the light emitting diode (LED1).

[0018] The utility model has the following beneficial effects and advantages:

[0019] 1. Compared with the prior art, this utility model uses all surface-mount components, which are firmly welded, reduce electromagnetic interference, and add a water leakage alarm device to avoid rainwater leakage caused by operational errors or other reasons when sealing the junction box cover.

[0020] 2. This utility model adopts an RC network and is connected to three-phase power. It can supply power to the rectifier circuit by changing the voltage offset angle. If the phase sequence is correct, the voltage is normal and the rectifier circuit works normally, converting AC to DC. If the phase sequence is incorrect, the rectifier circuit does not work and the output voltage is zero.

[0021] 3. This utility model adopts an indicator circuit, which can convert AC power into DC power through a rectifier circuit and filter out the ripple of the output voltage of the rectifier circuit through a filter circuit, making the voltage more stable. The indicator circuit judges the change of voltage offset angle through an RC network and displays it when the phase sequence is correct.

[0022] 4. This utility model adopts a water leakage alarm device, which uses a detection probe composed of two wires to detect water leakage and display an alarm. Attached Figure Description

[0023] Figure 1 This is the circuit block diagram of this utility model;

[0024] Figure 2 This is the circuit diagram of this utility model;

[0025] Figure 3 This is a phase sequence indicator display diagram. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] This utility model uses a circuit board, which is equipped with an RC network, a rectifier circuit, a filter circuit, an indicator circuit, and a water leakage alarm circuit. The electronic circuit components can be selected for circuits with voltages of 380VAC, 400VAC, or 415VAC, but are not limited to the voltages mentioned above. Other oil pumps can be adapted by changing the selection of electronic components. The phase sequence indicator housing can be made of ABS due to its higher temperature resistance and better flame retardancy; silicone sealant or epoxy resin is used for potting between the circuit board and the housing; Figure 3 The diagram shows the appearance of the phase sequence display on the circuit board. The three external phase ports (U, V, and W) correspond to the three terminals of the oil pump, mainly realizing two functions: phase sequence indication and water leakage alarm. The phase sequence indication function corresponds to... Figure 3 The power supply section corresponds to the water leakage alarm function in the alarm section.

[0028] likeFigure 1 The utility model discloses a circuit composition as shown below:

[0029] RC network: by capacitor and resistance series connection or parallel connection.

[0030] Rectifier circuit: by four light emitting diode bridge rectifier circuit composition.

[0031] Filter circuit: by filter capacitor and resistance parallel connection.

[0032] Indication circuit: by light emitting diode and current limiting resistance, zener diode series connection.

[0033] Water leakage alarm circuit: by transistor, with light emitting diode and current limiting resistance, finally use two lead wire to do detection probe.Water leakage alarm circuit adopts iron fluorine dragon high temperature resistant wire (temperature range -65 DEG C - + 250 DEG C) or wax line (temperature range -60 DEG C - + 105 DEG C), can select according to the oil pump temperature range when equipment operation.

[0034] As shown in Figure 2 All elements in the circuit adopt paster element, wherein:

[0035] In RC network, capacitor C1 selects 2kv, 15nF, capacitor C2 selects 100v, 0.47uF, capacitor C3 selects 105J, 100v, resistance R1 and resistance R2 all select 75k, 2w paster resistance, wherein C1 and C2 are in series, R1 and R2 are in series, and C3 is also in series.

[0036] In rectifier circuit, diode D1, D2, D3, D4 all select 1N4007 to build.D1 and D2 adopt common cathode connection, D3 and D4 adopt common anode connection.

[0037] In filter circuit, filter capacitor C4 selects 47uF, 50v, and the bleed resistance R4 connected in parallel with it selects 15k, 0.25w, and C4 and R4 are connected in parallel.

[0038] In indication circuit, light emitting diode LED0 selects reverse paster, red, current limiting resistance R3 selects 1k, 0.25w, and zener diode DZ1 selects 6.2v, 500mW.The cathode of LED0 is connected in series with R3 and DZ1.

[0039] In the water leakage alarm circuit, the transistor selects D882, the current limiting resistor R5 selects 100Ω, 0.25w, R6 selects 100Ω, 0.25w, the light emitting diode LED1 selects the reverse type, the red diode, and the voltage is slightly smaller. The two wires are suspended. The collector of the transistor is connected with one end of R5, the other end of R5 is connected with the cathode of the light emitting diode LED1, and the emitter is connected with the cathode of LED0. The anode of the light emitting diode LED1 is connected with the resistor R6, and the other end of the resistor R6 is suspended.

[0040] The working principle of the utility model is as follows:

[0041] The phase sequence indicator is provided with A, B and C three phases, and the sequence direction is consistent with the internal binding post of the oil pump; if the phase sequence is correct, LED0 is bright, if the phase sequence is wrong or the phase is missing, LED0 is not bright. The utility model adopts RC network, mainly according to the positive and negative phase sequence voltage applied on the RC network to determine the bright and dark of LED0. Especially, the phase sequence indicator increases the water leakage detection circuit, and is externally connected with two detection probes; if the two detection probes detect water, the water acts as a conductive medium, can make the transistor bias current increase, the light emitting diode LED1 is bright, then it indicates that there is water at the bottom of the junction box, and the sealing is not good; when someone sees that LED1 emits light, then the specific solution can be taken according to the problem.

Claims

1. A three-phase phase sequence indicator with a water leakage alarm circuit, characterized in that, The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected. The indicating circuit comprises a series connection of a voltage stabilizing tube DZ1, a resistor R3 and a light emitting diode LED0. The water leakage alarm circuit comprises a series connection of a light emitting diode LED1, a current limiting resistor R5 and a triode.

2. A three-phase phase sequence indicator with a water leakage alarm circuit according to claim 1, characterized in that, The RC network comprises a resistor R1, a resistor R2, a capacitor C1, a capacitor C2 and a capacitor C3. One end of the resistor R1 is connected with the phase A, and the other end is connected with the rectifier circuit through the resistor R2 as the first output end of the RC network.

3. A three-phase phase sequence indicator with a water leakage alarm circuit according to claim 1 or 2, characterized in that, The indicating circuit comprises a series connection of a voltage stabilizing tube DZ1, a resistor R3 and a light emitting diode LED0.

4. A three-phase phase sequence indicator with water leakage alarm circuit as claimed in claim 1 wherein, The water leakage alarm circuit comprises a series connection of a light emitting diode LED1, a current limiting resistor R5 and a triode.

5. A three-phase phase sequence indicator with water leakage alarm circuit as claimed in claim 1 wherein, The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected.

6. A three-phase phase sequence indicator with water leakage alarm circuit as claimed in claim 1 wherein, The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected.

7. A three-phase phase sequence indicator with water leakage alarm circuit as claimed in claim 1 wherein, The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected.

8. A three-phase phase sequence indicator with water leakage alarm circuit as claimed in claim 1 wherein, The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected.

9. A three-phase phase sequence indicator with water leakage alarm circuit as claimed in claim 1 wherein, The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected.

10. A three-phase phase sequence indicator with a water leakage alarm circuit according to claim 9, characterized in that, The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected. The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected. The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected. The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected. The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected. The RC network, the rectifier circuit, the filter circuit, the indicating circuit and the water leakage alarm circuit are sequentially connected.

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