An Electrically Controlled Concrete Batching Plant Admixture Supply System

Abstract

This utility model relates to the field of concrete mixing admixture technology, and proposes an admixture supply system for a concrete mixing plant based on electrical control. The system comprises a storage system, a pump system, a pipeline system, an execution unit, and a control circuit system. Only one water pump is needed to achieve four functions: admixture injection, in-tank circulation, inter-tank transfer, and production batching, replacing the traditional multi-pump, multi-pipeline mode. The control circuit system employs a dual-relay hardware interlock mechanism, requiring mandatory verification of the valve status before the water pump can be started, thus eliminating the risk of misoperation. This utility model features low equipment cost, small footprint, safe and efficient operation, significantly reduced frequency of manual intervention and operational difficulty, and effectively improves the automation level and reliability of admixture management in concrete production.

Description

Technical Field

[0001] This utility model relates to the field of concrete mixing admixtures technology, and in particular to an admixture supply system for an electrically controlled concrete mixing plant. Background Technology

[0002] Concrete mixing plants typically use different types of admixtures during the production process. These admixtures are generally stored in corresponding storage tanks, and operations such as admixture injection, internal circulation within storage tanks, transfer between different storage tanks, and supply to the concrete production system are carried out according to production needs.

[0003] Existing admixture supply systems typically have corresponding pump sets and pipelines for different delivery functions. Different storage tanks and different delivery paths are relatively independent, which results in a large number of pump sets and pipelines required by the system. This not only increases equipment investment and space occupation, but also makes pipeline layout and maintenance more complicated.

[0004] Meanwhile, admixtures are prone to sedimentation or concentration stratification after being stored in storage tanks for a certain period of time, requiring circulation to maintain a relatively uniform admixture state. When transferring admixtures between storage tanks, external filling, or supplying admixtures to the production system, it is also necessary to switch the corresponding pipelines and valves. In the existing system, these operations are mostly performed manually, and the procedures are relatively cumbersome. When the valve opening status does not match the water pump operating status, situations such as water pump idling and abnormal pipeline pressure may occur, affecting the operational safety and reliability of the admixture supply system.

[0005] Therefore, there is an urgent need for an electrical control-based admixture supply system for concrete mixing plants to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an electrically controlled admixture supply system for concrete mixing plants, thereby resolving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An admixture supply system for an electrically controlled concrete mixing plant includes: a storage system consisting of multiple admixture storage tanks, each admixture storage tank having an inlet and an outlet, and the outlet of the admixture storage tank having an admixture shut-off valve; A pump system, the pump system comprising at least one water pump, a filter located on the inlet side of the water pump, and a check valve located on the outlet side of the water pump; A pipeline system is used to connect the outlet of the admixture storage tank to the inlet and outlet sides of the pump system in a predetermined flow direction, and a diversion port for external filling and mixing is provided on the pipeline. An execution unit, comprising multiple electrically controlled valves, wherein the electrically controlled valves are located at the inlet, outlet, external filling port, and mixing port of the admixture storage tank; The control circuit system is powered by AC power and controls the start and stop of the water pump and the opening and closing of the electric control valve.

[0008] Preferably, the shut-off valve is a union ball valve, the filter is a Y-type filter, the water pump is a self-priming pump, and the check valve is a PPR material check valve.

[0009] Preferably, there are three admixture storage tanks, namely a first storage tank, a second storage tank, and a third storage tank; the electrically controlled valves at the outlets of the admixture storage tanks are all located on the outlet side of the admixture shut-off valve.

[0010] Preferably, the electric control valve is a normally closed electric ball valve, and the electric control valve includes: a liquid inlet control valve for tank 1, a liquid inlet control valve for tank 2, a liquid inlet control valve for tank 3, a liquid outlet control valve for tank 1, a liquid outlet control valve for tank 2, a liquid outlet control valve for tank 3, an external filling port control valve, and a mixing port control valve.

[0011] Preferably, the control circuit system includes: three circuit breakers, control buttons, intermediate relays, push-button switches, and an operation panel; the control buttons include a first rotary button and a second rotary button; the intermediate relays include: a liquid inlet relay for tank 1, a liquid inlet relay for tank 2, a liquid inlet relay for tank 3, an external filling port relay, a liquid outlet relay for tank 1, a liquid outlet relay for tank 2, a liquid outlet relay for tank 3, a reference port relay, a first interlock relay, and a second interlock relay; the control circuit system includes: a first control circuit, a second control circuit, and a third control circuit.

[0012] Preferably, the first control circuit includes: a circuit breaker, a first rotary button, a tank-1 inlet relay, a tank-2 inlet relay, a tank-3 inlet relay, and an external filling port relay; the first rotary button includes four output positions and one circuit breaker position, the four output positions are respectively connected to the A1 terminal of the control coil of the tank-1 inlet relay, the tank-2 inlet relay, the tank-3 inlet relay, and the external filling port relay, the A1 terminal takes two phase lines and connects them to the common terminal COM1 and COM2 of this relay, and connects the normally open contact NO1 of the common terminal COM1 group to the L phase terminal of the control coil of the tank-1 inlet control valve, the tank-2 inlet control valve, the tank-3 inlet control valve, and the external filling port control valve, respectively, the common terminal COM2 group of each tank-1 inlet relay, the tank-2 inlet relay, the tank-3 inlet relay, and the external filling port relay to the A1 terminal of the control coil of the first interlocking relay.

[0013] Preferably, the second control circuit includes: a circuit breaker, a second rotary button, a tank-1 outlet relay, a tank-2 outlet relay, a tank-3 outlet relay, and a reference port relay; the second rotary button includes four output positions and one circuit breaker position, the four output positions are respectively connected to the control coil A1 terminal of the tank-1 outlet relay, the tank-2 outlet relay, the tank-3 outlet relay, and the reference port relay, the A1 terminal takes two phase lines and connects them to the common terminal COM1 and COM2 of this relay, and connects the normally open contact NO1 of the common terminal COM1 group to the L phase terminal of the control coil of the tank-1 outlet control valve, the tank-2 outlet control valve, the tank-3 outlet control valve, and the reference port control valve, respectively, the common terminal COM2 group of each tank-1 outlet relay, the tank-2 outlet relay, and the tank-3 outlet relay to the control coil A1 terminal of the second interlock relay.

[0014] Preferably, the third control circuit includes: a circuit breaker, a push-button switch, a first interlocking relay, and a second interlocking relay; the push-button switch is a self-locking push-button switch; the output terminal of the circuit breaker is connected to the common terminal COM2 of the first interlocking relay, and then the normally open contact NO2 corresponding to COM2 is connected in series to the common terminal COM2 of the second interlocking relay, and then the normally open contact NO2 corresponding to COM2 is connected in series to the common terminal COM of the push-button switch, and the normally open contact NO terminal of the push-button switch is connected to the L terminal of the water pump.

[0015] Preferably, the control panel is a stainless steel distribution cabinet with three functional holes on the cabinet door: a first rotary button is installed in the upper left hole, a second rotary button is installed in the upper right hole, and a push-button switch is installed in the lower center hole.

[0016] Preferably, a drain port is provided between the filter and the inlet side of the water pump, and also between the outlet side of the check valve.

[0017] This utility model discloses an admixture supply system for an electrically controlled concrete mixing plant, which has the following beneficial effects.

[0018] This invention can achieve four functional modes—admixture filling, tank circulation, inter-tank transfer, and production mixing—using only one water pump and one pipeline system. In contrast, traditional systems require multiple dedicated pumps and multiple pipelines to achieve different functions, thus significantly reducing equipment costs and space requirements.

[0019] The circulation mode can keep the admixtures inside and outside the tank uniform and reduce the sedimentation rate, while the traditional system relies on manual stirring or natural settling, which can easily lead to stratification of admixture concentration and affect the quality of concrete.

[0020] The tank transfer function allows production to continue during single-tank maintenance, whereas traditional systems require a complete shutdown.

[0021] The system employs dual-relay hardware-level interlocking to force verification of the "one inlet and one outlet" valve pairing status before allowing pump start-up, completely eliminating the risks of dry operation and pipeline overpressure rupture caused by misoperation in traditional systems.

[0022] The entire system is controlled by electricity, which greatly reduces the frequency of manual intervention and the difficulty of operation, and reduces human error compared with traditional systems.

[0023] The number of storage tanks in the system can be freely increased or decreased to meet the production needs of mixing plants of different sizes. When expanding, only additional storage tanks and corresponding electric valves need to be added in parallel, without replacing the core pump set and control equipment. Compared with traditional fixed configuration systems, the transformation cost is reduced and the existing production process is not affected. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the connection of the storage system, pump system, piping system, and execution unit in this application.

[0025] Figure 2 This is a schematic diagram of the wiring of the control circuit system of this application.

[0026] Figure 3 This is a schematic diagram of the operation panel of this application.

[0027] In the attached diagram: 1-Admixture storage tank; 101-First storage tank; 102-Second storage tank; 103-Third storage tank; 2-Admixture shut-off valve; 201-First shut-off valve; 202-Second shut-off valve; 203-Third shut-off valve; 3-Filter; 4-Drain outlet; 5-Water pump; 6-Check valve; 7-Pipeline; 8-Electric control valve; 801-Tank 1 inlet control valve; 802-Tank 2 inlet control valve; 803-Tank 3 inlet control valve; 804-Tank 1 outlet control valve; 805-Tank 2 outlet control valve; 806-Tank 3 outlet control valve; 807-External filling port control valve; 80 8-Control valve for reference port; 9-Circuit breaker; 10-Control button; 1001-First rotary button; 1002-Second rotary button; 11-Intermediate relay; 1101-Tank 1 inlet relay; 1102-Tank 2 inlet relay; 1103-Tank 3 inlet relay; 1104-External filling port relay; 1105-Tank 1 outlet relay; 1106-Tank 2 outlet relay; 1107-Tank 3 outlet relay; 1108-Reference port relay; 1109-First interlock relay; 1110-Second interlock relay; 12-Push-button switch; 13-Operation panel. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Example

[0031] Reference Figure 1 As shown, an admixture supply system for an electrically controlled concrete mixing plant includes: a storage system, which consists of multiple admixture storage tanks 1, each admixture storage tank 1 having an inlet and an outlet, and an admixture shut-off valve 2 at the outlet of the admixture storage tank 1; The pump system includes at least one water pump 5, a filter 3 located on the inlet side of the water pump 5, and a check valve 6 located on the outlet side of the water pump 5. The pipeline system is used to connect the outlet of the admixture storage tank 1 to the inlet and outlet sides of the pump system in a predetermined flow direction, and to set up a diversion port on the pipeline for external filling and mixing. The execution unit includes multiple electrically controlled valves 8, which are located at the inlet, outlet, external filling port and mixing port of the admixture storage tank 1. The control circuit system is powered by AC power and controls the start and stop of the water pump 5 and the opening and closing of the electric control valve 8.

[0032] Specifically, in this embodiment, the admixture storage tank 1 is made of 10m translucent PE material. 3 Cylindrical tank body; Additive shut-off valve 2 adopts a PPR32 union ball valve for easy disassembly and maintenance; Preferably, in this embodiment, a drain port 4 is provided between the filter 3 and the inlet side of the water pump 5, and at the outlet side of the check valve 6.

[0033] Preferably, in this embodiment, the shut-off valve is a union ball valve, the filter 3 is a Y-type filter 3, the water pump 5 is a self-priming pump, and the check valve 6 is a PPR material check valve 6.

[0034] It should be noted that filter 3 is a PPR32Y type filter. According to the flow direction marking of filter 3, the arrow direction must be consistent with the medium flow direction of pipeline 7 during installation. A drain port 4 is set at a low position on the outlet side of filter 3. The valve of drain port 4 is a PPR32 union ball valve. After the medium is filtered, it is connected to the inlet of water pump 5. Water pump 5 is a Lingxiao BJZ0100 plastic blade self-priming pump. A check valve 6 is installed at the outlet of water pump 5. The check valve 6 is a PPR32 check valve. The arrow direction of the flow direction marking of check valve 6 must be consistent with the medium flow direction of pipeline 7 to prevent backflow and water hammer effect. A drain port 4 is set at a low position on the outlet side of pipeline 7 of check valve 6. The valve of drain port 4 is a PPR32 union ball valve.

[0035] Preferably, in this embodiment, there are three admixture storage tanks 1, namely a first storage tank 101, a second storage tank 102, and a third storage tank 103; the liquid outlets of the first storage tank 101, the second storage tank 102, and the third storage tank 103 are respectively equipped with a first shut-off valve 201, a second shut-off valve 202, and a third shut-off valve 203; the electric control valves 8 provided at the liquid outlets of the admixture storage tanks 1 are all located on the liquid outlet side of the admixture shut-off valve 2.

[0036] Preferably, in this embodiment, the electric control valve 8 is a normally closed electric ball valve, and the electric control valve 8 includes: a liquid inlet control valve 801 for tank 1, a liquid inlet control valve 802 for tank 2, a liquid inlet control valve 803 for tank 3, a liquid outlet control valve 804 for tank 1, a liquid outlet control valve 805 for tank 2, a liquid outlet control valve 806 for tank 3, an external filling port control valve 807, and a mixing port control valve 808.

[0037] In this embodiment, the main pipe and branches of pipeline 7 are PPR32 water supply pipes, and the electric control valve 8 is a 220V normally closed DN32 electric ball valve. The pump system's inlet side pipeline system has four branches, which are respectively connected to the outlet control valve 804 of tank 1, the outlet control valve 805 of tank 2, the outlet control valve 806 of tank 3, and the external filling port control valve 807. The pump system's outlet side has four branches: the inlet control valve 801 of tank 1, the inlet control valve 802 of tank 2, the inlet control valve 803 of tank 3, and the reference port control valve 808.

[0038] Preferably, in this embodiment, such as Figure 2As shown, the control circuit system includes: three circuit breakers 9, control buttons 10, intermediate relays 11, push-button switches 12, and operation panel 13; control buttons 10 include a first rotary button 1001 and a second rotary button 1002; intermediate relays 11 include: tank 1 inlet relay 1101, tank 2 inlet relay 1102, tank 3 inlet relay 1103, external filling port relay 1104, tank 1 outlet relay 1105, tank 2 outlet relay 1106, tank 3 outlet relay 1107, reference port relay 1108, first interlock relay 1109, and second interlock relay 1110; the control circuit system includes: a first control circuit, a second control circuit, and a third control circuit.

[0039] Preferably, in this embodiment, the first control circuit includes: a circuit breaker 9, a first rotary button 1001, a tank-1 liquid inlet relay 1101, a tank-2 liquid inlet relay 1102, a tank-3 liquid inlet relay 1103, and an external filling port relay 1104; the function of the first control circuit is to control the opening and closing of the external filling port control valve 807, the tank-1 liquid inlet control valve 801, the tank-2 liquid inlet control valve 802, and the tank-3 liquid inlet control valve 803, and the phase wire of the first control circuit is connected to the circuit breaker 9. The common terminal of the first rotary button 1001 is connected to the circuit breaker 9, which is a 2P32A residual current circuit breaker 9. The first rotary button 1001 is an LW26-20 / 5 five-position switch. The first rotary button 1001 includes four output positions and one circuit breaker position. The four output positions are respectively connected to the A1 terminal of the control coil of the tank 1 liquid inlet relay 1101, tank 2 liquid inlet relay 1102, tank 3 liquid inlet relay 1103, and external filling port relay 1104. The A1 terminal takes two phases. The wires are respectively connected to the common terminals COM1 and COM2 of this relay, and the normally open contacts NO1 corresponding to the common terminal COM1 group are respectively connected to the L-phase terminals of the control coils of the tank 1 liquid inlet control valve 801, tank 2 liquid inlet control valve 802, tank 3 liquid inlet control valve 803, and external filling port control valve 807. The common terminal COM2 group of each tank 1 liquid inlet relay 1101, tank 2 liquid inlet relay 1102, tank 3 liquid inlet relay 1103, and external filling port relay 1104 corresponds to Normally open contact NO2 is connected in parallel to the control coil A1 terminal of the first interlock relay 1109; the neutral wire is connected via circuit breaker 9 to the control coil A2 terminal of the four tank 1 liquid inlet relays 1101, 1102, 1103, and 1104, and the control coil N-phase terminal of the tank 1 liquid outlet relays 1105, 1106, 1107, and 1108.

[0040] Preferably, in this embodiment, the second control circuit includes: a circuit breaker 9, a second rotary button 1002, a tank-1 outlet relay 1105, a tank-2 outlet relay 1106, a tank-3 outlet relay 1107, and a reference port relay 1108; the function of the second control circuit is to control the opening and closing of the reference port control valve 808, the tank-1 outlet control valve 804, the tank-2 outlet control valve 805, and the tank-3 outlet control valve 806; the phase wire of the second control circuit is connected to the common terminal of the second rotary button 1002 via the circuit breaker 9, the circuit breaker 9 is a 2P32A residual current circuit breaker 9, and the second rotary button 1002 is an LW26-20 / 5 five-position switch; the second rotary button 1002 includes four output positions and one circuit breaker position, the four output positions are respectively Connect the control coil A1 terminal of the liquid outlet relays 1105 (tank 1), 1106 (tank 2), 1107 (tank 3), and 1108 (reference port relay). Take two phase lines from the A1 terminal and connect them to the common terminals COM1 and COM2 of this relay respectively. Connect the normally open contact NO1 corresponding to the common terminal COM1 group to the L-phase terminal of the control coil of the liquid outlet control valve 804 (tank 1), liquid outlet control valve 805 (tank 2), liquid outlet control valve 806 (tank 3), and reference port control valve 808 respectively. Connect the normally open contact NO2 corresponding to the common terminal COM2 group of each liquid outlet relay 1105 (tank 1), liquid outlet relay 1106 (tank 2), and liquid outlet relay 1107 (tank 3) in parallel to the control coil A1 terminal of the second interlock relay 1110.

[0041] The normally open contact NO2 of the reference port relay 1108 is not connected to the safety interlock, enabling the concrete production operating system to independently verify the status of the storage tank outlet and the reference port control valve 808 and control the start and stop of the water pump 5 in reference mode. This prevents accidental starting of the water pump 5 from causing inaccurate reference metering. The neutral wire circuit has the same wiring method as the first control circuit.

[0042] Preferably, in this embodiment, the third control circuit includes: a circuit breaker 9, a push-button switch 12, a first interlocking relay 1109, and a second interlocking relay 1110. The function of the third control circuit is to first verify the matching status of the electric control valves 8 on the inlet and outlet sides of the pump system, and then determine whether the water pump 5 is allowed to start based on the verification results. The circuit breaker 9 is a 2P32A residual current circuit breaker 9, and the push-button switch 12 is a ZTP-LA38-11PN self-locking push-button switch 12. The output terminal of the circuit breaker 9 is connected to the common terminal COM2 of the first interlocking relay 1109, and then the normally open contact NO2 corresponding to COM2 is connected in series to the common terminal COM2 of the second interlocking relay 1110. Then, the normally open contact NO2 corresponding to COM2 is connected in series to the common terminal COM of the push-button switch 12. The normally open contact NO terminal of the push-button switch 12 is connected to the L terminal of the water pump 5. The neutral wire is connected to the control coil N terminal of the first interlocking relay 1109, the second interlocking relay 1110, and the N terminal of the water pump 5 via the circuit breaker 9.

[0043] It should be noted that the first interlocking relay 1109 and the second interlocking relay 1110 adopt a dual-relay hardware-level interlocking. The first interlocking relay 1109 and the second interlocking relay 1110 are connected in series through their normally open contacts to form an interlocking control circuit. This ensures that the circuit is closed only when the inlet valve and the outlet valve are correctly paired. The water pump 5 is only allowed to start after the "one inlet and one outlet" valve pairing status is forcibly verified, thus completely eliminating the risks of dry operation and pipeline 7 overpressure rupture caused by misoperation in traditional systems.

[0044] Preferably, in this embodiment, such as Figure 3 As shown, the control panel 13 is a stainless steel distribution cabinet with three functional holes on the cabinet door. The upper left hole is used to install the first rotary button 1001, the upper right hole is used to install the second rotary button 1002, and the lower middle hole is used to install the push button switch 12.

[0045] In this specific embodiment, the operation panel 131 is a 250*300*150 outdoor stainless steel distribution cabinet. Three functional holes are provided on the cabinet door. The hole positions are freely set according to the principles of aesthetics, practicality, and reserving space for future functional expansion. A hole diameter of 22mm is preferable. The upper left hole houses the first rotary button 1001 for controlling the opening and closing of the external filling port control valve 807, the tank one inlet control valve 801, the tank two inlet control valve 802, and the tank three inlet control valve 803. The upper right hole houses the second rotary button 1002 of the circuit control system for controlling the opening and closing of the reference filling port control valve 808, the tank one outlet control valve 804, the tank two outlet control valve 805, and the tank three outlet control valve 806. The lower center hole houses the circuit control system push-button switch 12 for controlling the start and stop of the water pump 5.

[0046] When using this electrical control-based concrete mixing plant admixture supply system, four function modes can be selected by combining the first rotary button 1001 and the second rotary button 1002 on the operation panel 13, and the final function action can be executed by pressing the start / stop button of the water pump 5.

[0047] In the filling mode, the first rotary button 1001 is turned to the position corresponding to the external filling port control valve 807 to open the external filling port control valve 807. At the same time, all the liquid outlet control valves 804 of tank 1, 805 of tank 2, and 806 of tank 3 are de-energized and closed. The second rotary button 1002 is turned to the position corresponding to the target tank liquid inlet electric control valve 8 to open the target tank liquid inlet electric control valve 8. At the same time, the electric control valves 8 of the liquid inlets of the other storage tanks and the reference port control valve 808 are de-energized and closed. For example, if the target tank is the first storage tank 101, the second rotary button 1002 is turned to the position corresponding to the liquid inlet control valve 801 of tank 1 to open the liquid inlet control valve 801 of tank 1. At the same time, the liquid inlet control valves 802 of tank 2, 803 of tank 3, and the reference port control valve 808 are de-energized and closed. The third control loop verifies the valve matching status. If the verification is successful, the "one inlet and one outlet" valve pairing status is met, the safety interlock mechanism is released, and the water pump 5 start / stop button is pressed to execute the priming function.

[0048] In cycle mode, the first rotary button 1001 and the second rotary button 1002 select the outlet and inlet positions of the same storage tank, opening the electric control valve 8 of the inlet and outlet of that storage tank. At the same time, the external filling port control valve 807 and the reference port control valve 808 are de-energized and closed. The electric control valves 8 of the outlet and inlet of other storage tanks are closed. The third control circuit verifies the valve matching status. If the verification is successful, the "one inlet and one outlet" valve pairing status is met, the safety interlock mechanism is released, and the pump 5 start / stop button is pressed to execute the cycle function.

[0049] In transfer mode, the first rotary button 1001 is turned to the position corresponding to the source tank outlet electric control valve 8, opening the source tank outlet electric control valve 8. At the same time, the other storage tank outlet electric control valves 8 and the external filling port control valve 807 are de-energized and closed. The second rotary button 1002 is turned to the position corresponding to the target tank inlet electric control valve 8, opening the target tank inlet electric control valve 8. At the same time, the other storage tank inlet electric control valves 8 and the reference port control valve 808 are de-energized and closed. The third control loop verifies the valve matching status. If the verification is successful, the "one inlet, one outlet" valve pairing status is met, the safety interlock mechanism is released, and the water pump 5 start / stop button is pressed to execute the inter-tank transfer function.

[0050] In the mixing mode, the first rotary button 1001 is turned to the position corresponding to the source tank outlet electric control valve 8, opening the source tank outlet electric control valve 8. Simultaneously, the control valves 807 of the other storage tank outlets and external injection ports are de-energized and closed. The second rotary button 1002 is turned to the position corresponding to the mixing port control valve 808, opening the mixing port control valve 808. Simultaneously, the electric control valves 8 of all storage tank inlets are de-energized and closed. At this time, the safety interlock mechanism is activated, and the concrete production operating system independently verifies the status of the storage tank outlets and mixing port electric control valves 8 and controls the start and stop of the water pump 5. This prevents accidental activation of the water pump 5, which could lead to inaccurate mixing measurement.

[0051] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.

Claims

1. A concrete mixing plant admixture supply system based on electrical control, characterized in that, include: The storage system consists of multiple admixture storage tanks, each admixture storage tank is equipped with an inlet and an outlet, and the outlet of the admixture storage tank is equipped with an admixture shut-off valve; A pump system, the pump system comprising at least one water pump, a filter located on the inlet side of the water pump, and a check valve located on the outlet side of the water pump; A pipeline system is used to connect the outlet of the admixture storage tank to the inlet and outlet sides of the pump system in a predetermined flow direction, and a diversion port for external filling and mixing is provided on the pipeline. An execution unit, comprising multiple electrically controlled valves, wherein the electrically controlled valves are located at the inlet, outlet, external filling port, and mixing port of the admixture storage tank; The control circuit system is powered by AC power and controls the start and stop of the water pump and the opening and closing of the electric control valve.

2. The admixture supply system for an electrically controlled concrete mixing plant according to claim 1, characterized in that, The shut-off valve is a union ball valve, the filter is a Y-type filter, the water pump is a self-priming pump, and the check valve is a PPR material check valve.

3. The admixture supply system for an electrically controlled concrete mixing plant according to claim 1, characterized in that, There are three admixture storage tanks, namely the first tank, the second tank, and the third tank; the electric control valves at the outlet of each admixture storage tank are all located on the outlet side of the admixture shut-off valve.

4. The admixture supply system for an electrically controlled concrete mixing plant according to claim 3, characterized in that, The electric control valve is a normally closed electric ball valve, and includes: a liquid inlet control valve for tank 1, a liquid inlet control valve for tank 2, a liquid inlet control valve for tank 3, a liquid outlet control valve for tank 1, a liquid outlet control valve for tank 2, a liquid outlet control valve for tank 3, an external filling port control valve, and a mixing port control valve.

5. The admixture supply system for an electrically controlled concrete mixing plant according to claim 4, characterized in that, The control circuit system includes: three circuit breakers, control buttons, intermediate relays, push-button switches, and an operation panel; the control buttons include a first rotary button and a second rotary button; the intermediate relays include: tank 1 inlet relay, tank 2 inlet relay, tank 3 inlet relay, external filling port relay, tank 1 outlet relay, tank 2 outlet relay, tank 3 outlet relay, reference port relay, first interlock relay, and second interlock relay; the control circuit system includes: a first control circuit, a second control circuit, and a third control circuit.

6. The admixture supply system for an electrically controlled concrete mixing plant according to claim 5, characterized in that, The first control circuit includes: a circuit breaker, a first rotary button, a tank-1 liquid inlet relay, a tank-2 liquid inlet relay, a tank-3 liquid inlet relay, and an external filling port relay; the first rotary button includes four output positions and one circuit breaker position. The four output positions are respectively connected to the A1 terminal of the control coil of the tank-1 liquid inlet relay, the tank-2 liquid inlet relay, the tank-3 liquid inlet relay, and the external filling port relay. Two phase lines are taken from the A1 terminal and connected to the common terminal COM1 and COM2 of this relay respectively. The normally open contact NO1 of the common terminal COM1 group is connected to the L-phase terminal of the control coil of the tank-1 liquid inlet control valve, the tank-2 liquid inlet control valve, the tank-3 liquid inlet control valve, and the external filling port control valve respectively. The normally open contact NO2 of the common terminal COM2 group of each tank-1 liquid inlet relay, tank-2 liquid inlet relay, tank-3 liquid inlet relay, and external filling port relay is connected in parallel to the A1 terminal of the control coil of the first interlocking relay.

7. The admixture supply system for an electrically controlled concrete mixing plant according to claim 5, characterized in that, The second control circuit includes: a circuit breaker, a second rotary button, a liquid outlet relay for tank 1, a liquid outlet relay for tank 2, a liquid outlet relay for tank 3, and a reference port relay; the second rotary button has four output positions and one circuit breaker position. The four output positions are respectively connected to the A1 terminal of the control coil of the liquid outlet relay for tank 1, the liquid outlet relay for tank 2, the liquid outlet relay for tank 3, and the reference port relay. Two phase lines are taken from the A1 terminal and connected to the common terminal COM1 and COM2 of this relay respectively. The normally open contact NO1 of the common terminal COM1 group is connected to the L-phase terminal of the control coil of the liquid outlet control valve for tank 1, the liquid outlet control valve for tank 2, the liquid outlet control valve for tank 3, and the reference port control valve respectively. The normally open contact NO2 of the common terminal COM2 group of each liquid outlet relay for tank 1, the liquid outlet relay for tank 2, and the liquid outlet relay for tank 3 is connected in parallel to the A1 terminal of the control coil of the second interlock relay.

8. The admixture supply system for an electrically controlled concrete mixing plant according to claim 5, characterized in that, The third control circuit includes: a circuit breaker, a push-button switch, a first interlocking relay, and a second interlocking relay; the push-button switch is a self-locking push-button switch; the output terminal of the circuit breaker is connected to the common terminal COM2 of the first interlocking relay, and then the normally open contact NO2 corresponding to COM2 is connected in series to the common terminal COM2 of the second interlocking relay, and then the normally open contact NO2 corresponding to COM2 is connected in series to the common terminal COM of the push-button switch, and the normally open contact NO terminal of the push-button switch is connected to the L terminal of the water pump.

9. A concrete mixing plant admixture supply system based on electrical control according to claim 5, characterized in that, The control panel is made of stainless steel electrical cabinet. Three functional holes are opened on the cabinet door. The first rotary button is installed in the upper left hole, the second rotary button is installed in the upper right hole, and the push-button switch is installed in the lower middle hole.

10. The admixture supply system for an electrically controlled concrete mixing plant according to claim 1, characterized in that, The filter is provided with a drain outlet between the inlet side of the water pump and the outlet side of the check valve.

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