A multi-user control box common water pump control system

Abstract

The application discloses a multi-user control box common water pump control circuit and system, wherein the contactor normally open contact points of each user water pump control box of the system are connected in parallel to a main water pump starting control loop, the number of user control boxes can be flexibly expanded by increasing the number of parallel loops; the control circuit realizes independent control of multiple user water pump control boxes on the same main water pump through independent control design; and the control circuit and system are suitable for use in the same substation to control water demand of jurisdictional areas of multiple users respectively, effectively avoid economic disputes and management conflicts caused by water supply management among different users, and improve the practicability and reliability of the system.

Description

Technical Field

[0001] This invention relates to a multi-user control box common water pump control system, belonging to the field of substation water pump control. Background Technology

[0002] With the transformation of global power grid operation mechanisms, privatized operation of overseas power grids has gradually become mainstream, and the operation and maintenance management model of substations has also undergone significant changes. Under this model, a substation is typically operated and managed by multiple maintenance users, and it is increasingly common for multiple users to jointly control a single water pump. However, most water pump control systems in domestic substations adopt a single-user control method, which cannot meet the needs of simultaneous control by multiple users. While some existing intelligent control systems can achieve multi-user control, they typically rely on complex communication modules and software systems, resulting in high costs.

[0003] Existing patent CN204716519U proposes a novel multi-user shared water pump control box. By setting up multiple control lines, each user can control the water pump through a single control loop. While this solution addresses the basic need for multiple users to jointly control a single water pump, the fact that different users share a single water pump control box fails to meet the requirement for independent water pump control when different users are located in different control rooms within the same substation.

[0004] Substations do not have high requirements for the complexity of pump control systems, but rather focus on the reliability and economy of the pump systems. Therefore, there is an urgent need for a new multi-user control box to control a single pump system, in order to effectively solve the above problems. This new system should enable multiple users to jointly control the pump through a simple control circuit without relying on complex communication modules and software, ensuring low cost, high reliability, and ease of use. Summary of the Invention

[0005] The present invention aims to provide a multi-user control box common water pump control system, which enables multiple user control boxes to jointly control a single water pump, ensuring the system's economy, reliability and ease of use.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a multi-user control box shared water pump control system, comprising: a shared main water pump system and n user control systems;

[0007] The shared main water pump system includes: a main water pump and a main water pump starter box; the main water pump starter box includes: a soft starter and a main water pump start control circuit; the i-th user control system includes: an i-th user control box, an i-th user water tank, a solenoid valve DCFi, and an i-th user control box control circuit; the i-th user control box includes: a contactor KAi, a selector switch Si, a start button BLi, and a stop button BDi; the i-th user water tank includes: a sensor FQi, used to detect the liquid level of the i-th user water tank; the solenoid valve DCFi is used to control the water intake of the i-th user water tank; the selector switch Si includes automatic and manual modes; the main water pump start control circuit includes: one end of the soft starter is connected to the power supply circuit, and the other end is connected to the main water pump motor, used to control the start and stop of the main water pump motor; all The normally open contacts of contactors KA1, KA2, ..., KAn in the user control box are connected in parallel and are all connected between the power supply circuit and the soft starter. The control circuit of the i-th user control box includes: the normally open contact of sensor FQi is connected in series between the coil of contactor KAi and the automatic mode of selector switch Si; the start button BLi is connected in series between the coil of contactor KAi and the manual mode of selector switch Si; the start button BLi is connected in parallel with the normally open contact of contactor KAi and is connected between the coil of contactor KAi and the manual mode of selector switch Si; the normally closed contact of stop button BDi is connected in series between the manual mode of selector switch Si and the start button BLi; the normally closed coil of solenoid valve DCFi is connected in series with the normally open contact of contactor KAi; where 1≤i≤n, n≥2.

[0008] The above scheme achieves independent control of the same main water pump by setting up multiple user water pump control boxes. The normally open contacts of the contactors in each water pump control box are connected in parallel to the main water pump start-up control circuit. By increasing the number of parallel circuits, the number of user control boxes can be flexibly expanded to meet the needs of different users. This scheme is suitable for multiple users within the same substation to control the water demand of their respective jurisdictions. Through independent control design, it effectively avoids economic disputes and management conflicts arising from water supply management between different users, improving the practicality and reliability of the system.

[0009] According to embodiments of the present invention, the present invention can be further optimized, and the optimized technical solution is as follows:

[0010] In one preferred embodiment, the i-th user control box further includes: an i-th main water pump start signal light and an i-th main water pump stop signal light; the control circuit of the i-th user control box further includes: a normally open contact of contactor KAi connected in series with the i-th main water pump start signal light, and a normally closed contact of contactor KAi connected in series with the i-th main water pump stop signal light; the i-th main water pump start signal light indicates that the i-th user controls the main water pump to be in the start state, and the i-th main water pump stop signal light indicates that the i-th user controls the main water pump to be in the stop state. The user can monitor the start and stop status of the main water pump through the signal lights.

[0011] In one preferred embodiment, the i-th user control system further includes: m water distribution pump systems; the k-th water distribution pump system includes: the k-th water distribution pump and the k-th water distribution tank; the i-th user control box further includes: a relay K corresponding to the k-th water distribution pump. i k Selector switch S i k BL Start button i k Stop button BD i k The k-th water distribution tank includes: sensor FQ i k The sensor is used to detect the liquid level of the k-th water tank; the i-th user water tank also includes: the sensor FQ corresponding to the k-th water tank. i q The control circuit for the i-th user's water tank is used to detect the water level in the i-th user's water tank; the control circuit for the i-th user's control box also includes: m control circuits for the water distribution pumps; the control circuit for the k-th water distribution pump includes: relay K. i k The coil and the selector switch S i k The automatic transmission is connected in series with the sensor FQ. i q Normally closed contacts and sensor FQ i k Normally open contact; Relay K i k The coil and the selector switch S i k The start button BL is connected in series between manual transmissions. i k BL Start button i k With relay K i k The normally open contacts are connected in parallel and are all connected to relay K. i k The coil and the selector switch S i k Between manual and manual modes, select switch S i k Manual transmission and start button BL i k BD is connected in series with the stop button. i k Normally closed contacts; where 1≤k≤m, 1≤q≤m, m≥1.

[0012] The above solution flexibly expands the number of water pumps controlled by each user by increasing the number of relays in the individual user control box, so as to meet the water needs of each user in different production and office locations, and maintain the independence of operation and maintenance management of each user while ensuring the operation of the main water pump.

[0013] In one preferred embodiment, the i-th user control box further includes: a start signal light for the k-th water pump and a stop signal light for the k-th water pump; the k-th water pump control circuit further includes: a relay K. i k The normally open contact is connected in series with the start signal light of the kth water pump, and the relay K i k The normally closed contact is connected in series with the stop indicator light for the kth water pump; the start indicator light for the kth water pump indicates that the kth water pump is in the start state, and the stop indicator light for the kth water pump indicates that the kth water pump is in the stop state. Users can monitor the start and stop status of the water pumps through the indicator lights.

[0014] In one preferred embodiment, the main water pump starter box further includes: a circuit breaker; the main water pump starter control circuit further includes: one end of the circuit breaker is connected to the power supply circuit, and the other end is connected to a parallel circuit of the normally open contacts of contactors KA1, KA2, ..., KAn of all user control boxes; and / or the i-th user control box further includes: an i-th circuit breaker; the i-th user control box control circuit further includes: one end of the i-th circuit breaker is connected to the power supply circuit, and the other end is connected to a selector switch Si; and / or the i-th user control box further includes: a k-th circuit breaker; the k-th branch water pump control circuit further includes: one end of the k-th circuit breaker is connected to the power supply circuit, and the other end is connected to a selector switch S. i k .

[0015] With the above solution, when a short circuit or overload fault occurs in the control circuit, the circuit breaker can disconnect the circuit within milliseconds, preventing the soft starter thyristor from burning out due to surge current and protecting the contactor coil or contacts from being burned out.

[0016] In one preferred embodiment, the main water pump starter box further includes a fuse; the main water pump starter control circuit further includes a fuse connected in series to the power supply circuit; and / or the i-th user control box further includes an i-th fuse; the i-th user control box control circuit further includes an i-th fuse connected in series to the power supply circuit; and / or the i-th user control box further includes a k-th fuse; the k-th branch water pump control circuit further includes a k-th fuse connected in series to the power supply circuit. In the above scheme, when a short circuit occurs in the circuit, the fuse melts and the power supply is disconnected. The fuse serves as a backup to cope with extreme short-circuit currents and is used for short-circuit protection.

[0017] In one preferred embodiment, the main water pump starter box further includes a water pump speed regulator; the water pump speed regulator is connected in parallel with the main water pump starter control circuit. In the above scheme, the water pump speed regulator is used to adjust the speed of the main water pump motor.

[0018] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention provides a multi-user control box shared water pump control system that, through independent control design, enables multiple user water pump control boxes to independently control the same main water pump. The normally open contacts of the contactors in each user water pump control box are connected in parallel to the main water pump start-up control circuit. By increasing the number of parallel circuits, the number of user control boxes can be flexibly expanded to meet the needs of different users. This system is suitable for multiple users within the same substation to control the water demand of their respective jurisdictions, effectively avoiding economic disputes and management conflicts arising from water supply management between different users, and improving the practicality and reliability of the system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a multi-user control box common water pump control system according to an embodiment of the present invention;

[0020] Figure 2 This is a control circuit diagram of the main water pump starter box according to an embodiment of the present invention;

[0021] Figure 3 This is a control loop diagram of user 1 control box 1 according to an embodiment of the present invention;

[0022] Figure 4 This is a control loop diagram of user 2 control box 2 according to an embodiment of the present invention;

[0023] Figure 5 This is a control circuit diagram of the user 2-point water pump 21 according to an embodiment of the present invention;

[0024] Figure 6 This is a control circuit diagram of user 2 water pump 22 according to an embodiment of the present invention. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0026] Example 1

[0027] This embodiment 1 provides a multi-user control box system for a shared water pump, including: a main water pump starter box, user water pump control boxes 1 / 2 / … / n, float level sensors FQ1 / FQ2 / … / FQn, solenoid valves DCF1 / DCF2 / … / DCFn, and corresponding control circuits. Each user water pump control box 1 / 2 / … / n is located in a different control room and independently controls the start control circuit of the same main water pump. The float level sensors in different user water tanks activate the contactors in the respective user water pump control boxes. The main water pump starter box receives the start signals from the contactors in the different user control boxes, thus enabling independent start and stop of the main water pump for different users. Each user solenoid valve receives the start signals from the contactors in the different user control boxes, and the valve of each user solenoid valve is opened, thus enabling independent control of the solenoid valve in each user's water pipe. The float level sensors can be replaced by photoelectric level sensors, pressure level sensors, ultrasonic level sensors, or other sensors that detect liquid levels using different principles.

[0028] The main water pump starter box comprises a soft starter, a water pump speed regulator, a circuit breaker, a fuse, and their control circuit. The soft starter, installed within the main water pump starter box, is used to smoothly start the water pump motor by controlling the rate of voltage or current rise. It integrates overload, short circuit, and phase loss protection functions to protect the motor and water pump system [Reference: Wang Mingjun. Improvement of the control circuit for the soft starter of the inlet water pump [J]. Equipment Management and Maintenance, 2005, 21: 47-48.]. The normally open contacts of contactors KA1 / KA2 / … / KAn in different user control boxes are connected in parallel to the main control circuit of the soft starter. The fuse is connected in series in the main power circuit, and the circuit breaker is connected in series in the main control circuit of the soft starter. The start and stop control of the water pump motor is achieved through the soft starter. When a short circuit or overload fault occurs in the soft starter or motor, the circuit breaker can disconnect the circuit within milliseconds, preventing the soft starter thyristor from burning out due to surge current. In a power supply circuit, a fuse is used for short-circuit protection. When a short circuit occurs in the circuit, the fuse melts and the power supply is disconnected. The fuse serves as a backup to deal with extreme short-circuit currents.

[0029] The user water pump control box includes: a control box body, contactors, relays, circuit breakers, fuses, a three-position selector switch, red indicator lights, green indicator lights, control buttons, and their control circuits. The fuses are connected in series in the main power supply circuit, and the circuit breakers are connected in series in the contactor control circuit. When a short circuit or overload fault occurs in the contactor control circuit, the circuit breaker can disconnect the circuit within milliseconds, protecting the contactor coil or contacts from burnout. The fuses in the power supply circuit are used for short-circuit protection; when a short circuit occurs, the fuse melts and the power supply is disconnected. The fuses serve as backup to handle extreme short-circuit currents.

[0030] The user water pump control box control circuit includes: a main control circuit, a solenoid valve control circuit, and a signal circuit. The main control circuit connects a three-position selector switch in series, the normally open contact of a low-level float sensor in series, a contactor coil, a normally open contact of the contactor, a start button, and a stop button. The solenoid valve control circuit connects the normally open contact of the contactor and the normally closed coil of the solenoid valve in series. The signal circuit connects the normally open contact of the contactor and a red main indicator light in series; the red main indicator light indicates that the main water pump is in the start state. The signal circuit also connects the normally open and normally closed contacts of the contactor in series and a green main indicator light in series; the green main indicator light indicates that the main water pump is in the stop state.

[0031] Example 2

[0032] In this embodiment 2, each user's water tank can also be connected in series with the float level sensor of each user's water distribution tank to start the starting relay of each user's water distribution pump, thereby enabling each user to control the water pump in their respective location area.

[0033] In this embodiment 2, the water pump control circuit of the user water pump control box includes: a main control circuit and a signal circuit. The main control circuit connects in series the three-position selector switch for the water pump, the normally closed contact of the user water tank float level sensor, the normally open contact of the water tank float level sensor, the start relay coil, the normally open contact of the start relay, the start button, and the stop button. The signal circuit connects in series the normally open contact of the start relay and the red indicator light; the signal circuit also connects in series the normally closed contact of the start relay and the green indicator light.

[0034] Example 3

[0035] like Figure 1 As shown, in this embodiment 3, taking two user control boxes as an example, the water supply system includes the following three parts:

[0036] (1) A shared water pump system, including: a main water pump for the well and a main water pump starter box;

[0037] (2) User 1 water pump system, including: solenoid valve DCF1, user 1 control box 1, water tank 1, float level sensor FQ1;

[0038] (3) User 2 water pump system, including: solenoid valve DCF2, user 2 control box 2, water tank 2, water tank 2 float level sensor FQ2 / FQ21 / FQ22, water distribution tank 21 / 22, water distribution tank 21 float level sensor FQ211, water distribution tank 22 float level sensor FQ221, water distribution pump 21 / 22.

[0039] Figure 2This is the control circuit diagram for the main water pump starter box. The normally open contacts of contactors KA1 / KA2 in different user control boxes are connected in parallel and then in series with the main water pump soft start switch circuit. When the coils of contactors KA1 / KA2 are energized, the normally open contacts of KA1 / KA2 close, the main water pump soft start circuit is activated, and the main water pump starts.

[0040] Figure 3 This is the control circuit diagram for User 1 control box 1. Each user's water pump control box has an automatic / manual switching circuit for water pump control to better meet on-site needs. When the three-position switch S1 is selected to the manual position, the start button BL1 can be manually pressed to energize contactor KA1 and start the main water pump. When the three-position switch S1 is selected to the automatic position, when the water level in the tank is lower than the preset value, the float level sensor FQ1 circuit closes and conducts, energizing contactor KA1 and automatically starting the water pump.

[0041] Each user control box has an independent control circuit for activating its own user's solenoid valve. For example, when the coil of contactor KA1 is energized, the water pump starts. The normally open contact of KA1 closes, the coil of solenoid valve relay DCF1 is energized, and the valve of the corresponding user's water pipe solenoid valve is opened, thereby achieving independent control of the water inlet for each user's water pipe.

[0042] Each user control box control circuit has a self-locking circuit. For example, the self-locking contact (KA1 normally open contact) is connected in parallel with the start button BL1. When the start button BL1 is pressed, the KA1 coil is energized, the main contacts close, and the main water pump starts running. At the same time, the self-locking contact also closes, forming a closed circuit. Even if the start button BL1 is released, the contactor KA1 coil can still remain energized through the self-locking contact, thus keeping the main water pump running. The stop button BD1 normally closed contact is connected in series in the self-locking circuit. When the stop button BD1 is pressed, its normally closed contact opens, the contactor KA1 is de-energized, and the main water pump stops running.

[0043] Each user control box has a water pump start / stop signal circuit. The normally open contact KA1 is connected in series with the red indicator light for water pump start, and the normally closed contact KA1 is connected in series with the green indicator light for water pump stop. When the contactor KA1 coil is energized and the main water pump starts, the normally open contact KA1 closes, and the red indicator light circuit for water pump start is activated. When the main water pump stops due to the de-energization of contactor KA1, the normally closed contact KA1 closes, and the green indicator light circuit for water pump stop is activated. Users can monitor the start / stop status of the main water pump through the indicator lights.

[0044] Figure 4The control circuit diagram for User 2 control box 2 is shown below. In addition to having the same main water pump control circuit as User 1 control box 1, User 2 water pump control box 2 also has a branch water pump control circuit. When the three-position switch is switched to automatic mode, when the liquid level in User 2 water tank 2 is higher than the first preset value, the normally closed contacts of float level sensors FQ21 / FQ22 close; when the liquid level in User 2 branch water tanks 21 / 22 is lower than the second preset value, the normally open contacts of float level sensors FQ211 / FQ221 close. When the liquid level in User 2 water tank 2 is higher than the first preset value, and simultaneously the liquid level in User 2 branch water tanks 21 / 22 is lower than the second preset value, it indicates that User 2 water tank 2 has sufficient water, and that User 2 branch water tanks 21 / 22 have low water. In this case, the series circuit connecting the normally closed contacts of float level sensors FQ21 / FQ22 and the normally open contacts of float level sensors FQ211 / FQ221 closes. When relay K21 / K22 of water distribution pump 21 / 22 is energized, water distribution pump 21 / 22 starts, and water tank 2 of user 2 supplies water to water distribution tank 21 / 22 of user 2.

[0045] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the present embodiments by those skilled in the art will fall within the scope defined by the appended claims.

Claims

1. A multi-user control box water pump control system, characterized in that, include: Shared main water pump system and n user control systems; The shared main water pump system includes: a main water pump and a main water pump starter box; the main water pump starter box includes: a soft starter and a main water pump starter control circuit. The i-th user control system includes: the i-th user control box, the i-th user water tank, the solenoid valve DCFi, and the i-th user control box control circuit; The i-th user control box includes: contactor KAi, selector switch Si, start button BLi, and stop button BDi; The i-th user's water tank includes: a sensor FQi, used to detect the liquid level in the i-th user's water tank; The solenoid valve DCFi is used to control the water inlet of the i-th user's water tank; The selection switch Si includes an automatic mode and a manual mode; The main water pump start control circuit includes: one end of the soft starter is connected to the power supply circuit, and the other end is connected to the main water pump motor, used to control the start and stop of the main water pump motor; the normally open contacts of contactors KA1, KA2, ..., KAn of all user control boxes are connected in parallel and are all connected between the power supply circuit and the soft starter. The control circuit of the i-th user control box includes: a normally open contact of sensor FQi connected in series between the coil of contactor KAi and the automatic position of selector switch Si; a start button BLi connected in series between the coil of contactor KAi and the manual position of selector switch Si; the start button BLi and the normally open contact of contactor KAi are connected in parallel and are both connected between the coil of contactor KAi and the manual position of selector switch Si; and a normally closed contact of stop button BDi connected in series between the manual position of selector switch Si and the start button BLi. The normally closed coil of the solenoid valve DCFi is connected in series with the normally open contact of the contactor KAi; Where 1 ≤ i ≤ n, n is an integer, and n ≥ 2; The i-th user control system also includes: m water distribution pump systems; The k-th water distribution pump system includes: the k-th water distribution pump and the k-th water distribution tank; The i-th user control box also includes: the relay K corresponding to the k-th water pump. i k Selector switch S i k BL Start button i k Stop button BD i k ; The k-th water distribution tank includes: sensor FQ i k , used to detect the liquid level in the kth water distribution tank; The i-th user water tank also includes: the sensor FQ corresponding to the k-th sub-water tank. i q , used to detect the liquid level in the water tank of the i-th user; The control loop of the i-th user control box also includes: m water pump control loops; The control circuit for the kth water pump includes: relay K i k The coil and the selector switch S i k The automatic transmission is connected in series with the sensor FQ. i q Normally closed contacts and sensor FQ i k Normally open contact; Relay K i k The coil and the selector switch S i k The start button BL is connected in series between manual transmissions. i k BL Start button i k With relay K i k The normally open contacts are connected in parallel and are all connected to relay K. i k The coil and the selector switch S i k Between manual and manual modes, select switch S i k Manual transmission and start button BL i k BD is connected in series with the stop button. i k Normally closed contacts; Where 1 ≤ k ≤ m, 1 ≤ q ≤ m, m ≥ 1; The i-th user control box also includes: the k-th water pump start signal light and the k-th water pump stop signal light; The control circuit for the kth water pump also includes: relay K i k The normally open contact is connected in series with the start signal light of the kth water pump, and the relay K i k The normally closed contact is connected in series with the stop signal light of the kth water pump; The start signal light for the kth water pump indicates that the kth water pump is in the start state, and the stop signal light for the kth water pump indicates that the kth water pump is in the stop state.

2. The multi-user control box water pump control system according to claim 1, characterized in that, The i-th user control box also includes: the i-th main water pump start signal light and the i-th main water pump stop signal light; The control circuit of the i-th user control box also includes: the normally open contact of contactor KAi is connected in series with the i-th main water pump start signal light, and the normally closed contact of contactor KAi is connected in series with the i-th main water pump stop signal light. The i-th main water pump start signal light indicates that the i-th user controls the main water pump to be in the start state, and the i-th main water pump stop signal light indicates that the i-th user controls the main water pump to be in the stop state.

3. The multi-user control box water pump control system according to claim 1, characterized in that, The main water pump starter box also includes: a circuit breaker; The main water pump start control circuit also includes: a circuit breaker with one end connected to the power supply circuit and the other end connected to the normally open contacts of contactors KA1, KA2, ..., KAn of all user control boxes in parallel circuit. and / or The i-th user control box also includes: the i-th circuit breaker; The control circuit of the i-th user control box also includes: one end of the i-th circuit breaker is connected to the power supply circuit, and the other end is connected to the selector switch Si; and / or The i-th user control box also includes: the k-th circuit breaker; The control circuit for the kth water pump also includes: one end of the kth circuit breaker is connected to the power supply circuit, and the other end is connected to the selector switch S. i k .

4. The multi-user control box water pump control system according to claim 1, characterized in that, The main water pump starter box also includes: a fuse; The main water pump start control circuit also includes: a fuse connected in series to the power supply circuit; and / or The i-th user control box also includes: the i-th fuse; The control circuit of the i-th user control box also includes: the i-th fuse connected in series to the power supply circuit; and / or The i-th user control box also includes: the k-th fuse; The control circuit for the kth water pump also includes: the kth fuse connected in series to the power supply circuit.

5. The multi-user control box water pump control system according to claim 1, characterized in that, The main water pump starter box also includes a water pump speed regulator; the water pump speed regulator is connected in parallel with the main water pump starter control circuit.

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