Water pump control device

Abstract

The utility model discloses a water pump control device which comprises a change-over switch 1SAC, a float switch 1FK, a water pump contactor 1KM, a water pump thermal relay FR and a water pump starting time relay KT. A coil of the water pump starting time relay KT is connected with the float switch 1FK in series, and a delay closing contact of the water pump starting time relay KT is connected with the water pump contactor 1KM in series; the change-over switch 1SAC, the float switch 1FK, the water pump starting time relay KT, a pair of delay closing contacts of the water pump starting time relay KT, the water pump contactor 1KM and the water pump thermal relay FR are connected in parallel to form a water pump automatic starting and stopping loop. The water pump starting time relay KT is additionally arranged, the setting time of the water pump starting time relay KT can be adjusted at any time, the standing time control function is added, dual control of water level and time is achieved, and the control flexibility of the water pump operation mode is improved.

Description

Technical Field

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

[0002] The chemical flocculation sedimentation tank of the power plant will regularly discharge sludge into the sludge pool, and the water in the sludge pool will be transported to the flocculation sedimentation tank through a vertical pump for recycling to form a closed circuit. In the prior art, the start and stop of the recycling water pump in the sludge pool have two control modes: manual and automatic. Among them, the manual control mode is to manually start or manually shut down the water pump on the spot, and the automatic control mode is realized through the float switch on the water surface. When the float switch detects that the water level rises to a certain height, it sends a start signal and the water pump starts running. Conversely, when the float switch detects that the water level drops to a certain height, it sends a stop signal and the water pump stops running.

[0003] Under the above-mentioned operation mode, since the water quality discharged from the flocculation sedimentation tank to the sludge tank is poor, if it is directly recycled into the flocculation sedimentation tank, there will be a problem of water turbidity, which will directly affect the subsequent industrial water purification effect and increase the economic and labor costs of chemical water treatment in the power plant. Utility Model Content

[0004] The utility model provides a water pump control device which effectively improves the operational flexibility of the water pump and can solve at least one of the above-mentioned technical problems.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a water pump control device, including a conversion switch 1SAC, a float switch 1FK, a water pump contactor 1KM, a water pump thermal relay FR and a water pump start time relay KT;

[0006] The water pump start time relay KT has a pair of delayed closing contacts, the coil of the water pump start time relay KT is connected in series with the float switch 1FK, and the delayed closing contact of the water pump start time relay KT is connected in series with the water pump contactor 1KM;

[0007] The conversion switch 1SAC, the float switch 1FK, the water pump start time relay KT, a pair of delayed closing contacts of the water pump start time relay KT, the water pump contactor 1KM and the water pump thermal relay FR are connected in parallel to form a water pump automatic start and stop circuit;

[0008] The switching switch 1SAC, the water pump contactor 1KM and the water pump thermal relay FR are connected in series to form a manual start and stop circuit for the water pump.

[0009] Furthermore, the delay setting time of the water pump starting time relay KT is adjustable, the minimum time measurement unit is s, and the starting time is 0s.

[0010] Furthermore, it also includes two power terminals T and N, and the power terminal T is connected in series with a control power fuse FU, and the control power fuse FU is used to cut off the current protection circuit.

[0011] Furthermore, it also includes a water pump operation indicator light 1HY, which is connected in parallel to the water pump contactor 1KM to indicate the working state of the water pump contactor 1KM.

[0012] Furthermore, it also includes a water pump fault indicator light 1HG, which is connected in series to the water pump thermal relay FR to indicate the working state of the water pump thermal relay FR.

[0013] Furthermore, it also includes a control power indicator light HD, which is connected in parallel between the power terminals T and N to indicate the working status of the device circuit.

[0014] The beneficial effects of the utility model are embodied in:

[0015] 1. The utility model adds a water pump start time relay KT on the basis of the traditional control of water pump start or stop by water surface float switch. The setting time of water pump start time relay KT can be adjusted at any time according to the actual situation on site, and the static time control function is added to realize the dual control of "water level + time", which improves the control flexibility of water pump operation mode. In this way, the water level factor is no longer the only condition for controlling the start and stop of the water pump, and the water quality factor is also taken into account to prevent the turbid water from being directly recycled to the flocculation sedimentation tank. The water in the sludge tank can be recycled to the flocculation sedimentation tank after being static for a period of time, so as to avoid affecting the subsequent purification effect of industrial water and effectively improve the water quality of the flocculation sedimentation tank.

[0016] 2. The utility model cancels the start relay, stop relay and low-level float in the traditional water pump control circuit, makes full use of the existing equipment and materials on site, simplifies the original control circuit, reduces the workload of transformation, and has high equipment operation reliability. It is suitable for the same type of water pump operating conditions, has good guidance and reference value, and brings better economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a circuit diagram of a water pump control device according to an embodiment of the utility model.

[0018] Figure 2 It is the loop circuit diagram of a traditional water pump control device. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that satisfy both A and B.

[0020] See also Figure 1 , the embodiment of the utility model provides a water pump control device, including a conversion switch 1SAC, a float switch 1FK, a water pump contactor 1KM, a water pump thermal relay FR and a water pump start time relay KT;

[0021] The water pump start time relay KT has a pair of delayed closing contacts, the coil of the water pump start time relay KT is connected in series with the float switch 1FK, and the delayed closing contact of the water pump start time relay KT is connected in series with the water pump contactor 1KM;

[0022] The conversion switch 1SAC, the float switch 1FK, the water pump start time relay KT, a pair of delayed closing contacts of the water pump start time relay KT, the water pump contactor 1KM and the water pump thermal relay FR are connected in parallel to form a water pump automatic start and stop circuit;

[0023] The switching switch 1SAC, the water pump contactor 1KM and the water pump thermal relay FR are connected in series to form a manual start and stop circuit for the water pump.

[0024] The utility model adds a water pump starting time relay KT on the basis of the traditional method of controlling the start or stop of the water pump by a water surface float switch. The setting time of the water pump starting time relay KT can be adjusted at any time according to the actual situation on site, and the static time control function is added to realize the dual control of "water level + time", thereby improving the control flexibility of the water pump operation mode. In this way, the water level factor is no longer the only condition for controlling the start and stop of the water pump, and the water quality factor is also taken into consideration to prevent turbid water from being directly recycled to the flocculation sedimentation tank. The water in the sludge tank can be recycled to the flocculation sedimentation tank after being static for a period of time, thereby avoiding affecting the subsequent purification effect of industrial water and effectively improving the water quality of the flocculation sedimentation tank.

[0025] In this embodiment, the delay setting time of the water pump start time relay KT is adjustable, the minimum time measurement unit is s, and the starting time is 0s. With this design, the setting time of the water pump start time relay KT can be adjusted at any time according to the actual situation on site, thus adding a static time control function to realize the joint control of the water level and time to start or stop the water pump.

[0026] In this embodiment, two power terminals T and N are further included. A control power fuse FU is connected in series to the power terminal T. The control power fuse FU is used to cut off the current protection circuit.

[0027] In this embodiment, a water pump operation indicator light 1HY is also included, which is connected in parallel to the water pump contactor 1KM to indicate the working state of the water pump contactor 1KM. With this design, when the water pump contactor 1KM is connected to the power supply of the recovery water pump and started, the water pump operation indicator light 1HY is on, indicating that the water pump is working; when the water pump contactor 1KM is disconnected from the power supply of the recovery water pump, the water pump operation indicator light 1HY is off, indicating that the water pump is not working, and the display is intuitive.

[0028] In this embodiment, a water pump fault indicator light 1HG is also included, and the water pump fault indicator light 1HG is connected in series to the water pump thermal relay FR to indicate the working state of the water pump thermal relay FR. With this design, whether in manual or automatic mode, when a pair of normally closed contacts of the water pump thermal relay FR is disconnected, the primary circuit of the water pump contactor 1KM is disconnected from the power supply of the recovery water pump, the water pump stops running, and the water pump fault indicator light 1HG goes out, otherwise it lights up.

[0029] In this embodiment, a control power indicator light HD is also included. The control power indicator light HD is connected in parallel between the power terminals T and N to indicate the working status of the device circuit. When the device circuit is powered normally, the control power indicator light HD lights up, otherwise it is off.

[0030] In this application, the control working principle of the water pump in automatic operation mode is as follows:

[0031] When the water level in the sludge tank rises to the high water level, the normally open contact of the float switch 1FK is closed, and is connected in series with the water pump start time relay KT to form a closed loop. A pair of contacts of the water pump start time relay KT are closed after a set delay time, and the primary circuit of the water pump contactor 1KM is connected to the recovery water pump power supply, and the water pump starts to run;

[0032] When the water level in the sludge tank drops to a low water level, the normally open contact of the float switch 1FK is disconnected, the coil of the water pump start time relay KT loses power, a pair of delayed closing contacts of the water pump start time relay KT is disconnected, the primary circuit of the water pump contactor 1KM is disconnected from the power supply of the recovery water pump, and the water pump stops running;

[0033] The water pump thermal relay FR is connected in series with the water pump contactor 1KM. No matter in manual or automatic mode, when the thermal relay is actuated, a pair of normally closed contacts of the water pump thermal relay FR is disconnected, the primary circuit of the water pump contactor 1KM is disconnected from the power supply of the recovery water pump, and the water pump stops running.

[0034] See also Figure 2 , the traditional water pump control device includes: conversion switch 1SAC, float switch FK, water pump contactor 1KM, water pump thermal relay FR, water pump start relay 01KA, water pump stop relay 02KA, control power fuse FU, control power indicator HD, water pump operation indicator 1HY, water pump fault indicator 1HG;

[0035] The float switch FK is provided with a high-position float switch 1FK and a low-position float switch 2FK;

[0036] The water pump start relay 01KA has two pairs of normally open contacts, the water pump stop relay 02KA has a pair of normally closed contacts, and the water pump thermal relay FR has a pair of normally closed contacts;

[0037] The high-level float switch 1FK and a pair of normally open contacts of the water pump starting relay 01KA are connected in parallel to form a self-holding circuit;

[0038] The conversion switch 1SAC, the self-holding circuit, the water pump starting relay 01KA, a pair of normally open contacts of the water pump starting relay 01KA, a pair of normally closed contacts of the water pump stopping relay 02KA, the water pump contactor 1KM, the water pump running indicator light 1HY and the water pump thermal relay FR are connected in parallel to form a water pump automatic starting circuit;

[0039] The conversion switch 1SAC, the low-level float switch 2FK, and the water pump stop relay 02KA are connected in series to form a water pump automatic stop circuit;

[0040] The conversion switch 1SAC, the water pump contactor 1KM, and the water pump thermal relay FR are connected in series to form a manual start and stop circuit for the water pump.

[0041] In the traditional control device, the control working principle of the water pump in automatic operation mode is as follows:

[0042] When the water level in the sludge tank rises to the high water level, the normally open contact of the high-level float switch 1FK is closed, and is connected in series with a pair of normally closed contacts of the water pump start relay 01KA and the water pump stop relay 02KA to form a closed circuit, wherein the high-level float switch 1FK is connected in parallel with a pair of normally open contacts of the water pump start relay 01KA to form a self-holding circuit of the water pump start relay 01KA coil, and the other pair of normally open contacts of the water pump start relay 01KA is closed, and the primary circuit of the water pump contactor 1KM is connected to the recovery water pump power supply, and the water pump starts to run;

[0043] When the water level in the sludge tank drops to a low water level, the normally open contact of the low-level float switch 2FK is closed and connected in series with the water pump stop relay 02KA to form a closed circuit. A pair of normally closed contacts of the water pump stop relay 02KA is disconnected, the coil of the water pump start relay 01KA loses power, and another pair of closed normally open contacts of the water pump start relay 01KA is disconnected. The primary circuit of the water pump contactor 1KM is disconnected from the power supply of the recovery water pump, and the water pump stops running.

[0044] In summary, the traditional automatic control method is to start and stop the water pump through the float switch FK on the water surface: when the float switch FK detects that the water level rises to a certain height, it sends a start signal and the water pump starts running; conversely, when the float switch FK detects that the water level drops to a certain height, it sends a stop signal and the water pump stops running. In this way, the water level is the only condition for controlling the start and stop of the water pump. However, when it is actually put into use, it is not only the influence of the water level factor that should be considered, but also the influence of other factors besides the water level, especially the water quality factor. It is not expected to start the water pump immediately, but to wait for the water surface to stand for a period of time before starting the water pump, so as to avoid directly recycling the poor turbid water quality into the flocculation sedimentation tank, and the standing time is not fixed, and it needs to be able to be adjusted at any time according to the water quality. In view of this situation, the present application cancels the start relay, stop relay and low-level float in the original control circuit in the original starting circuit of the water pump, adds a water pump starting time relay KT, adds a time control function, and realizes the dual control of "water level + time" to enhance the control flexibility of the water pump operation mode, while reducing the number of float switches FK, simplifying the control circuit, and improving economic costs.

[0045] It should be understood that the examples and implementation modes described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art may make various modifications or changes based on the examples and implementation modes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water pump control device, characterized in that: It includes a transfer switch 1SAC, a float switch 1FK, a water pump contactor 1KM, a water pump thermal relay FR and a water pump start time relay KT; The water pump start time relay KT has a pair of delayed closing contacts, the coil of the water pump start time relay KT is connected in series with the float switch 1FK, and the delayed closing contact of the water pump start time relay KT is connected in series with the water pump contactor 1KM; The conversion switch 1SAC, the float switch 1FK, the water pump start time relay KT, a pair of delayed closing contacts of the water pump start time relay KT, the water pump contactor 1KM and the water pump thermal relay FR are connected in parallel to form a water pump automatic start and stop circuit; The switching switch 1SAC, the water pump contactor 1KM and the water pump thermal relay FR are connected in series to form a manual start and stop circuit for the water pump.

2. The water pump control device according to claim 1, characterized in that: The delay setting time of the water pump starting time relay KT is adjustable, the minimum time measurement unit is s, and the starting time is 0s.

3. The water pump control device according to claim 1, characterized in that: It also includes two power terminals T and N. A control power fuse FU is connected in series to the power terminal T. The control power fuse FU is used to cut off the current protection circuit.

4. The water pump control device according to claim 1, characterized in that: It also includes a water pump operation indicator light 1HY, which is connected in parallel to the water pump contactor 1KM to indicate the working state of the water pump contactor 1KM.

5. The water pump control device according to claim 1, characterized in that: It also includes a water pump fault indicator light 1HG, which is connected in series to the water pump thermal relay FR to indicate the working state of the water pump thermal relay FR.

6. The water pump control device according to claim 3, characterized in that: It also includes a control power indicator light HD, which is connected in parallel between the power terminals T and N and is used to indicate the working status of the device circuit.

Images