Drainage device

Abstract

The utility model discloses a liquid discharge device, which comprises a first loop and a second loop, and is characterized in that a first liquid level switch SQ1 is connected in series with a coil of an alternating current contactor KM and is connected in parallel with a time-delay disconnection contact of a first power-on time-delay relay KT1; the second loop comprises a second liquid level switch SQ2 which is connected in series with a coil of a first power-on delay relay KT1; the first loop and the second loop are connected in parallel to a direct-current power supply; and a contact of the alternating-current contactor KM and the water pump motor M are connected in series to an alternating-current power supply. Automatic drainage can be achieved, drainage can be conducted without manual operation of a switch, and drainage reliability is improved. Besides, when the water level reaches the qualified water level, namely the second water level, water drainage continues to be conducted through the first power-on time-delay relay KT1, then redundant residual liquid in the pipeline can be emptied, more thorough liquid drainage is conducted in a time-delay water drainage mode, and the reliability of liquid drainage is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coolant drainage, in particular to a drainage device. Background Art

[0002] The coolant of the gantry milling machine in the workshop is processed as follows. Usually, a water storage tank is set on the ground, and a water tank is arranged in the tank to hold the coolant. A submersible pump is also arranged in the water storage tank. Once the liquid in the water tank overflows, it will cause the submersible pump motor M to enter water, damaging the submersible pump.

[0003] Currently, the manual drainage method is adopted. The liquid level in the water tank is observed manually. When the liquid level is too high, the pump is started manually to drain the water in the water tank into the water storage tank. However, the reliability of manual drainage is poor. For example, when draining water manually, it may take a long time to drain, resulting in the water in the water tank being emptied but the submersible pump not being turned off, causing the submersible pump to dry burn. Another example is that the water level in the water tank cannot be observed in time manually, resulting in the liquid in the water tank overflowing. How to improve the drainage reliability of the water tank has become an urgent problem to be solved. Summary of the Invention

[0004] The utility model provides a drainage device to solve the problem of low drainage reliability in the current manual drainage.

[0005] The utility model provides a drainage device, including: a first circuit, including: a first liquid level switch SQ1 is connected in series with the coil of an AC contactor KM, and the first liquid level switch SQ1 is connected in parallel with the normally open contact of a first power-on delay relay KT1;

[0006] A second circuit, including: a second liquid level switch SQ2 is connected in series with the coil of the first power-on delay relay KT1;

[0007] The first circuit and the second circuit are connected in parallel to a DC power supply;

[0008] The contact of the AC contactor KM is connected in series with a water pump motor M to an AC power supply.

[0009] Optionally, a thermal protection switch FR is arranged between the water pump motor M and the contact of the AC contactor KM.

[0010] Optionally, it further includes a manual air switch QF,

[0011] The manual air switch QF is connected in series with the coil of a second power-on delay relay KT2 to the DC power supply; the normally open contact of the second power-on delay relay KT2 is connected in series with a buzzer to the DC power supply;

[0012] The manual switch, the thermal protection switch FR and the water pump motor M are connected in series to the AC power supply.

[0013] Optionally, it further includes:

[0014] A third circuit, including: the normally-closed delayed-closure contact KT3-2 of the time-delay release relay KT3, the time-delay release relay KT3, and the coil of the third time-delay energization relay KT4 are connected in series to a DC power supply; the third circuit is connected in parallel with the coil of the relay KJ1;

[0015] A fourth circuit, including: the normally-open delayed-opening contact KT3-1 of the time-delay release relay KT3, the normally-closed contact of the third time-delay energization relay KT4, and the normally-open contact of the KJ1 relay are connected in series; the fourth circuit and the buzzer are connected in series to a DC power supply.

[0016] Optionally, the fourth circuit is connected in parallel with the time-delay contact of the second time-delay energization relay KT2.

[0017] Optionally, it further includes an AC-DC switching power supply ACDC;

[0018] The AC-DC switching power supply provides the DC power supply DC and the AC power supply AC.

[0019] By providing the power supply for the overall solution through an AC-DC switching power supply ACDC, the power supply module can be simplified, which is convenient for replacement and maintenance.

[0020] Optionally, the voltage specification of the AC power supply is 220V, and the voltage specification of the DC power supply is 24V.

[0021] Optionally, the water pump motor M is located in the water storage tank, and a water tank is further included in the water storage tank; the water pump motor M is located outside the water tank, and the water pump motor M is located at the bottom of the water storage tank.

[0022] The technical solution of the embodiment of the present utility model: The first circuit includes: a first liquid level switch SQ1 and a coil of an AC contactor KM are connected in series, and the first liquid level switch SQ1 is in parallel with a normally open timedelay contact of a first energizing timedelay relay KT1; The second circuit includes: a second liquid level switch SQ2 and a coil of the first energizing timedelay relay KT1 are connected in series; The first circuit and the second circuit are connected in parallel to a DC power supply; The contacts of the AC contactor KM and a water pump motor M are connected in series to an AC power supply. When the liquid level reaches the first height, the first liquid level switch SQ1 closes and the second liquid level switch SQ2 opens. At this time, the energization of the coil of the AC contactor KM causes the contacts of the AC contactor KM to close, and the water pump motor M starts to drain water. As the water pump motor M continues to operate, the water level in the water tank gradually decreases. When it drops to the second height, the first liquid level switch SQ1 opens and the second liquid level switch SQ2 closes. At this time, the coil of the first energizing timedelay relay KT1 is energized, and the normally open timedelay contact of the first energizing timedelay relay KT1 enables the coil of the AC contactor KM to continue to be energized, thereby enabling the water pump motor M to continue to operate. Until after the timing time T1 of the first timedelay relay KT1 is reached, the normally open timedelay contact of the first energizing timedelay relay KT1 opens, and the water pump motor M stops operating. The liquid drainage device provided by the present utility model can automatically start the water pump motor M to drain water through the first liquid level switch SQ1 and the second liquid level switch SQ2. It realizes automatic drainage, without the need for manual operation of the switch for drainage, improving the reliability of drainage. In addition, when the qualified water level, that is, the second water level, is reached, drainage continues through the first energizing timedelay relay KT1, thereby being able to drain the excess residual liquid in the pipeline, and draining the liquid more thoroughly through the method of timedelay drainage, further improving the reliability of liquid drainage.

[0023] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present utility model, nor is it used to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the circuit principle of a liquid drainage device provided by an embodiment of the present utility model.

[0026] Figure 2 It is a schematic structural diagram of the circuit principle of another liquid drainage device provided by an embodiment of the present utility model. Detailed implementation manners

[0027] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Figure 1 It is a schematic structural diagram of the circuit principle of a liquid discharge device provided by an embodiment of the present utility model. Figure 2 It is a schematic structural diagram of the circuit principle of another liquid discharge device provided by an embodiment of the present utility model. The liquid discharge device includes:

[0030] A first loop, including: a first liquid level switch SQ1 and a coil of an AC contactor KM are connected in series, and the first liquid level switch SQ1 is in parallel with a normally open delay-off contact of a first energized time-delay relay KT1; a second loop, including: a second liquid level switch SQ2 and a coil of the first energized time-delay relay KT1 are connected in series; the first loop and the second loop are connected in parallel to a DC power supply; the contact of the AC contactor KM and a water pump motor M are connected in series to an AC power supply.

[0031] The first liquid level switch SQ1 and the second liquid level switch SQ2 are pre-installed in the water tank, and the water level heights detected by the first liquid level switch SQ1 and the second liquid level switch SQ2 are set. When the liquid level reaches the first height, the first liquid level switch SQ1 closes and the second liquid level switch SQ2 opens. When the liquid level reaches the second height, the first liquid level switch SQ1 opens and the second liquid level switch SQ2 closes. The first height is greater than the second height.

[0032] When the liquid level reaches the first height, the first liquid level switch SQ1 closes and the second liquid level switch SQ2 opens. At this time, the coil of the AC contactor KM makes the contacts of the AC contactor KM attract, and the water pump motor M starts to drain water. As the water pump motor M continues to work, the water level in the water tank gradually decreases. When it drops to the second height, the first liquid level switch SQ1 opens and the second liquid level switch SQ2 closes. At this time, the coil of the first power-on delay relay KT1 is energized, and the coil of the AC contactor KM continues to be energized through the normally open contact of the first power-on delay relay KT1, so that the water pump motor M continues to work. Until after reaching the timing time T1 of the first delay relay KT1, the normally open contact of the first power-on delay relay KT1 opens, and the water pump motor M stops working. The liquid discharge device provided by the utility model can automatically start the water pump motor M to drain water through the first liquid level switch SQ1 and the second liquid level switch SQ2.

[0033] For the liquid discharge device provided by the embodiment of the present utility model, the first circuit includes: the first liquid level switch SQ1 is connected in series with the coil of the AC contactor KM, and the first liquid level switch SQ1 is connected in parallel with the normally open contact of the first power-on delay relay KT1; the second circuit includes: the second liquid level switch SQ2 is connected in series with the coil of the first power-on delay relay KT1; the first circuit and the second circuit are connected in parallel to the DC power supply; the contacts of the AC contactor KM are connected in series with the water pump motor M to the AC power supply. It can realize automatic drainage, without manual operation of the switch for drainage, improving the drainage reliability. In addition, when reaching the qualified water level, that is, the second water level, drainage continues through the first power-on delay relay KT1, so as to be able to empty the redundant residual liquid in the pipeline, and perform more thorough liquid discharge through the way of delayed drainage, further improving the reliability of liquid discharge.

[0034] On the basis of the above embodiment, a thermal protection switch FR is provided between the water pump motor M and the contacts of the AC contactor KM.

[0035] In order to protect the water pump motor M, a thermal protection switch FR is provided between the water pump motor M and the contacts of the AC contactor KM. If the water pump is flooded or frequently started, causing the temperature of the water pump motor M to rise to a certain temperature, the thermal protection switch FR timely cuts off the power supply of the water pump motor M, protects the water pump motor M, and improves the service life of the water pump motor M.

[0036] On the basis of the above embodiment, it further includes a manual air switch QF. The manual air switch QF and the coil of the second power-on delay relay KT2 are connected in series to the DC power supply; the normally open contact of the second power-on delay relay KT2 is connected in series with the buzzer to the DC power supply; the manual opening switch, the thermal protection switch FR and the water pump motor M are connected in series to the AC power supply.

[0037] The operator operates the manual air switch QF to close, enabling the water pump motor M to start working for pumping water. When the manual air switch QF is closed, the coil of the second power-on delay relay KT2 is energized simultaneously. The preset time of the second power-on delay relay KT2 is T2. When the time after the manual air switch QF is closed exceeds T2, it indicates that the operator may have forgotten to turn off the water pump motor. At this time, the delay-on contact of the second power-on delay relay KT2 closes, energizing the buzzer to give an alarm, reminding the operator to turn off the manual air switch QF.

[0038] Based on the above-described automatic drainage, a manual mode is provided. The operator can manually drain the liquid in the water tank. Different from a conventional manual switch, the present utility model adds a second power-on delay relay KT2 on the basis of a conventional manual air switch QF. The second power-on delay relay KT2 can be used to time the opening time of the manual air switch QF. If the opening time of the manual air switch QF exceeds the timing time of the second power-on delay relay KT2, the buzzer is activated to give an alarm, thereby realizing timing of the drainage time during manual control of drainage and giving an alarm through the buzzer when the timing time is exceeded, improving the safety of manual drainage.

[0039] Based on the above-described embodiment, it further includes:

[0040] A third circuit, including: the power-off delay-on contact KT3-2 of the power-off delay relay KT3, the power-off delay relay KT3, and the coil of the third power-on delay relay KT4 are connected in series to a DC power supply; the third circuit is connected in parallel with the coil of the relay KJ1.

[0041] A fourth circuit, including: the power-off delay-off contact KT3-1 of the power-off delay relay KT3, the normally closed contact of the third power-on delay relay KT4, and the normally open contact of the KJ1 relay are connected in series; the fourth circuit is connected in series with the buzzer FM to a DC power supply.

[0042] Based on the automatic drainage, the timing time of the power-off delay relay KT3 is set to T3. The effect achieved by the above circuit structure is that, based on the automatic drainage, if the time when the water pump motor M changes from off to on is less than T3 and the water pump motor M starts, it indicates that the seepage water in the sump is too large. At this time, other measures need to be taken for drainage, and the buzzer FM needs to be triggered to give an alarm. Other measures can include diverting the seepage liquid into a new water tank or adding additional drainage equipment, etc.

[0043] When the time from the start to the stop of the water pump motor M is less than T3, the contact of the AC contactor KM disconnects, the power-off delay-open contact KT3-1 of the power-off delay relay KT3 closes, the power-off delay-close contact KT3-2 of the power-off delay relay KT3 disconnects, and the normally-closed contact of the third power-on delay relay KT4 closes. At this time, if the water pump motor M starts again, the contact of the AC contactor KM closes, the KJ1 relay closes, and the buzzer FM gets powered on to give an alarm.

[0044] When the time from the start to the stop of the water pump motor M is greater than or equal to T3, the contact of the AC contactor KM disconnects, the power-off delay-open contact KT3-1 of the power-off delay relay KT3 disconnects, the power-off delay-close contact KT3-2 of the power-off delay relay KT3 closes, and the normally-closed contact of the third power-on delay relay KT4 opens. At this time, when the water pump motor M starts again, the buzzer FM does not give an alarm.

[0045] The above-mentioned embodiment can realize alarming according to the starting frequency of the water pump motor.

[0046] On the basis of the above-mentioned embodiment, the fourth loop is connected in parallel with the delay contact of the second power-on delay relay KT2.

[0047] The above-mentioned embodiment can use one buzzer to meet the dual requirements of delay alarming and manual delay alarming, improving the utilization rate of the buzzer.

[0048] On the basis of the above-mentioned embodiment, it further includes an AC-DC switching power supply;

[0049] The AC-DC switching power supply provides the DC power supply and the AC power supply.

[0050] Optionally, the voltage specification of the AC power supply is 220V, and the voltage specification of the DC power supply is 24V. Optionally, the specification of the AC power supply can also be 360V, and the specification of the DC power supply can also be 15V. With power supplies of various specifications, it is possible to match different high-power water pumps and buzzers, improving flexibility.

[0051] On the basis of the above-mentioned embodiment, the submersible pump is located in the water storage tank, and the water storage tank also includes the water tank; the submersible pump is located outside the water tank and at the bottom of the water storage tank.

[0052] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A liquid discharging device, characterized in that, Comprising: The first circuit includes: a first liquid level switch SQ1 and a coil of an AC contactor KM are connected in series, and the first liquid level switch SQ1 is in parallel with a normally open delay-off contact of a first power-on delay relay KT1; The second circuit includes: a second liquid level switch SQ2 and a coil of the first power-on delay relay KT1 are connected in series; The first circuit and the second circuit are connected in parallel to a DC power supply; The contacts of the AC contactor KM and a water pump motor M are connected in series to an AC power supply.

2. The device according to claim 1, characterized in that, A thermal protection switch FR is provided between the water pump motor M and the contacts of the AC contactor KM.

3. The device according to claim 2, characterized in that, It further includes a manual air switch QF, The manual air switch QF and a coil of a second power-on delay relay KT2 are connected in series to the DC power supply; a delay contact of the second power-on delay relay KT2 and a buzzer are connected in series to the DC power supply; The manual on-switch, the thermal protection switch FR and the water pump motor M are connected in series to the AC power supply.

4. The device according to claim 3, characterized in that, It further includes: The third circuit includes: a normally closed delay-on contact KT3-2 of a power-off delay relay KT3, the power-off delay relay KT3 and coils of a third power-on delay relay KT4 are connected in series to the DC power supply; the third circuit is connected in parallel with a coil of a relay KJ1; The fourth circuit includes: a normally open delay-off contact KT3-1 of the power-off delay relay KT3, a normally closed contact of the third power-on delay relay KT4 and a normally open contact of the KJ1 relay are connected in series; the fourth circuit and the buzzer are connected in series to the DC power supply.

5. The device according to claim 4, characterized in that, The fourth circuit is connected in parallel with the delay contact of the second power-on delay relay KT2.

6. The device according to claim 5, characterized in that, It further includes an AC-DC switching power supply; The AC-DC switching power supply provides the DC power supply and the AC power supply.

7. The device according to claim 6, characterized in that, The voltage specification of the AC power supply is 220V, and the voltage specification of the DC power supply is 24V.

8. The device according to claim 7, characterized in that, The water pump motor M is located in a water storage tank, and a water tank is further included in the water storage tank; the water pump motor M is located outside the water tank, and the water pump motor M is located at the bottom of the water storage tank.

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