Anti-freezing control system of wheel washing machine for construction waste

Abstract

The invention relates to a construction waste wheel washing machine anti-freezing control system which comprises temperature detection devices and a PLC control system, the PLC control system is connected with the temperature detection devices, a heating device, an execution mechanism, a back flushing device and a drainage device, and the temperature detection devices are arranged on the outer wall of the tail end of a water conveying pipeline and the lower end of the liquid level in a water tank. The heating device is connected to the signal isolator through a shielding cable, signals are isolated and then connected to the PLC control system, the heating device comprises heating rods and heat tracing belts, the heating rods are arranged at the bottom of a water tank of the wheel washing machine or on the outer sides of the four side walls, the heat tracing belts are arranged on the outer walls of all water conveying pipelines and the outer wall of a water pump, and the executing mechanism is a wheel washing machine control system. An outlet pipeline of the blowback device is connected to an outlet of the water pump, air pressure is conveyed to the tail end spray head through a water conveying pipeline, and the drainage device is installed at the lowest end of the pipeline.

Description

Technical Field

[0001] The present application relates to the technical field of wheel washers, and in particular to an antifreeze control system for a wheel washer for construction waste. Background Art

[0002] Wheel washing machine is a device that can perform multi-directional cleaning on tires and chassis of various engineering vehicles. Generally, it is controlled by a computer and can automatically complete the washing and mud discharge processes. Since the washing water can be recycled, less water can be used to complete the vehicle washing, so it is widely used in various engineering construction and transportation.

[0003] However, when the temperature is low, wheel washers are prone to freezing. When water freezes in the pipes, nozzles, sinks, pumps and other parts of the wheel washers, it is easy to cause pipe ruptures, nozzle blockages and equipment failure to work properly. This will not only affect its function of washing vehicles, but also damage the wheel washers and increase maintenance costs. Especially in the cold areas of the north in winter, the problem of wheel washers not being able to work properly due to low temperatures is particularly prominent. In order to ensure that wheel washers can operate normally in low temperature environments, various antifreeze technologies have emerged. Summary of the invention

[0004] The present invention aims to provide an antifreeze control system for a wheel washer for construction waste to solve the deficiencies in the prior art. The technical problem to be solved by the present invention is achieved through the following technical solutions.

[0005] A wheel washer antifreeze control system for construction waste, the system comprises a temperature detection device and a PLC control system, the PLC control system is respectively connected to the temperature detection device, a heating device, an actuator, a back-blowing device and a drainage device, the temperature detection device is arranged on the outer wall of the end of a water supply pipeline and below the liquid level in a water tank, is connected to a signal isolator through a shielded cable, and is connected to the PLC control system after signal isolation, the heating device comprises a heating rod and a heating belt, the heating rod is arranged at the bottom of the wheel washer water tank or the outside of the four side walls, the heating belt is arranged on the outer walls of all water supply pipelines and the outer walls of a water pump, the actuator is a wheel washer control system, the back-blowing device outlet pipeline is connected to the water pump outlet, the wind pressure is sent to the end nozzle through the water supply pipeline, and the drainage device is installed at the lowest end of the pipeline.

[0006] Preferably, the back-blowing device is an air compressor.

[0007] Preferably, it also includes a touch screen, which is connected to the PLC control system and is used to display the control page and control the PLC control system.

[0008] Preferably, the PLC control system includes a PLC controller, circuit breakers QF0-QF5, relays KA1-KA4, and contactors KM1-KM3. The PLC controller receives the temperature control signal of the temperature detection device and the control signal of the operation button to control the power-on operation of the heating device, the back-blowing device, and the drainage device.

[0009] Preferably, the input end of the PLC controller is connected to the operation button and the temperature detection device, and the output end is connected to the relay KA1-KA4 coil and the fault indicator light. The normally open contacts of the relays KA1-KA3 are connected between the contactor KM1-KM3 coils and the power supply, and the normally open contacts of the relay KA4 are connected between the solenoid valve coil YV1 and the power supply.

[0010] Preferably, the PLC control system includes a first heating electrical main circuit, a second heating electrical main circuit, a back-blowing device electrical main circuit and a drainage device electrical main circuit, wherein the first heating electrical main circuit is connected in sequence from the power supply end to circuit breakers QF0, QF1, contactor KM1 and the first heating device, the second heating electrical main circuit is connected in sequence from the power supply end to circuit breakers QF0, QF2, contactor KM2 and the second heating device, the back-blowing device electrical main circuit is connected in sequence from the power supply end to circuit breakers QF0, QF3, contactor KM3 and the back-blowing device, and the drainage device electrical main circuit is connected in sequence from the power supply end to circuit breakers QF0, QF5, fuse FU1 and the drainage device.

[0011] Preferably, a thermal relay FR1 is provided in the first heating electrical main circuit, and the thermal relay FR1 is placed between the contactor KM1 and the first heating device; a thermal relay FR2 is provided in the second heating electrical main circuit, and the thermal relay FR2 is placed between the contactor KM2 and the second heating device; a thermal relay FR3 is provided in the back-blowing device electrical main circuit, and the thermal relay FR3 is placed between the contactor KM3 and the back-blowing device.

[0012] The antifreeze control system of the wheel washer for construction waste of the present invention has the following beneficial effects:

[0013] 1. The wheel washer antifreeze control system of the present invention adds a set of heating devices and corresponding control systems to the existing wheel washer device. The heating devices cover the bottom or four sides of the water tank, the water pipeline and the water pump to ensure that the temperature of the stored water is above the condensation point and does not freeze.

[0014] 2. The antifreeze control system of the wheel washing machine of the present invention is also provided with a back-blowing device. The back-blowing device adopts an air compressor to connect the pipeline to the pipe at the outlet of the water pump. After each operation of the wheel washing machine is completed, the air compressor is used to compress the air to back-blow the pipeline and the nozzle to dry the residual water in the pipeline and the nozzle to ensure that there is no water stain left. In this way, the nozzle will not be blocked by freezing of water droplets during the next operation.

[0015] 3. The present invention adopts a PLC controller to control the entire system, which can not only perform manual control, such as turning on or off heating, backblowing or drainage, but also automatically heat according to the temperature measured by the temperature detection device. The equipment has a high degree of automation and saves labor costs.

[0016] 4. The present invention sets a drainage device at the lowest end of the pipeline. After the wheel washer operation is completed, the drainage device is opened through the PLC controller to automatically discharge the residual water in the pipeline and the nozzle by its own weight to prevent the residual water from freezing and clogging the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the antifreeze control system of the present invention;

[0018] Figure 2 This is the circuit diagram of the main electrical circuit of the antifreeze control system of the present invention;

[0019] Figure 3 It is a circuit diagram of a PLC controller of the antifreeze control system of the present invention;

[0020] Figure 4 The figure is a circuit diagram of a PLC output relay of the antifreeze control system of the present invention.

[0021] Description of reference numerals: 1. Temperature detection device; 2. PLC control system; 3. Touch screen; 4. Heating device; 5. Actuator; 6. Backflush device; 7. Drainage device DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0023] Example

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] A wheel washer antifreeze control system for construction waste, the system comprises a temperature detection device 1 and a PLC control system 2, the PLC control system 2 is respectively connected to the temperature detection device 1, a heating device 4, an actuator 5, a back-blowing device 6 and a drainage device 7, the temperature detection device 1 is arranged on the outer wall of the end of the water pipeline and below the liquid level in the water tank, is connected to the signal isolator through a shielded cable, and is connected to the PLC control system 2 after signal isolation, the heating device 4 comprises a heating rod and a heating belt, the heating rod is arranged at the bottom of the wheel washer water tank or the outside of the four side walls, the heating belt is arranged on the outer walls of all the water pipelines and the outer walls of the water pump, the actuator 5 is the wheel washer control system, the outlet pipeline of the back-blowing device 6 is connected to the water pump outlet, and the wind pressure is sent to the terminal nozzle through the water pipeline, and the drainage device 7 is installed at the lowest end of the pipeline.

[0031] Furthermore, the back-blowing device 6 is an air compressor.

[0032] Furthermore, it also includes a touch screen 3, which is connected to the PLC control system 2 and is used to display control pages and control the PLC control system.

[0033] The PLC control system 2 is divided into automatic control and manual control. The staff can switch through the operation button, and manually control each component through the touch screen 3, or set it to automatic control. The manual control is added to prevent each device from being manually started and debugged when the device is being debugged or in a fault state.

[0034] Furthermore, the PLC control system 2 includes a PLC controller, circuit breakers QF0-QF5, relays KA1-KA4, and contactors KM1-KM3. The PLC controller receives the temperature control signal of the temperature detection device 1 and the control signal of the operation button to control the power-on operation of the heating device 4, the back-blowing device 6, and the drainage device 7.

[0035] The following is an explanation using automatic control as an example. If the water temperature is within the normal operating temperature range (generally set to be higher than 0°C), the equipment operates normally. At this time, when a vehicle passes by, the actuator 5 of the wheel washer system for construction waste, that is, the wheel washer control system operates normally, washes the vehicle, and the heating system is in standby mode. In a low temperature environment, the temperature detection device 1 monitors the water temperature in real time. Before the wheel washer starts working, if the water temperature drops to the set lower limit temperature (such as 0°C), the temperature detection device 1 sends a signal to the PLC controller. After receiving the signal, the PLC controller starts the heating system through internal logic judgment, and the heating element starts working, converting electrical energy into thermal energy to heat the water in the water tank and the water in the pipe. When the water temperature rises to the set upper limit temperature (such as 3°C), the PLC controller receives the signal from the temperature detection device again, and after internal logic judgment, turns off the heating system, thereby realizing automatic control of the water temperature and preventing the water from freezing in the wheel washer. When the wheel washer is not working, the PLC controller outputs a signal to start the backflush device 6, and the water in the pipeline is discharged by compressed air. At the same time, the drainage device 7 is started regularly to discharge the water at the lower end of the pipeline to prevent the water from freezing.

[0036] Furthermore, the PLC controller input end is connected to the operation button and the temperature detection device, the output end is connected to the relay KA1-KA4 coil and the fault indicator light, the normally open contact of the relay KA1-KA3 is connected between the contactor KM1-KM3 coil and the power supply, and the normally open contact of the relay KA4 is connected between the solenoid valve coil YV1 and the power supply. Figure 3 The PLC controller shown is a Siemens 200smart series small PLC, and the temperature detection device is a Pt100 temperature detection device.

[0037] Furthermore, the PLC control system includes a first heating electrical main circuit, a second heating electrical main circuit, a back-blowing device electrical main circuit and a drainage device electrical main circuit, wherein the first heating electrical main circuit is connected in sequence from the power supply end to the circuit breakers QF0, QF1, the contactor KM1 and the first heating device, the second heating electrical main circuit is connected in sequence from the power supply end to the circuit breakers QF0, QF2, the contactor KM2 and the second heating device, the back-blowing device electrical main circuit is connected in sequence from the power supply end to the circuit breakers QF0, QF3, the contactor KM3 and the back-blowing device, and the drainage device electrical main circuit is connected in sequence from the power supply end to the circuit breakers QF0, QF5, the fuse FU1 and the drainage device.

[0038] Furthermore, a thermal relay FR1 is provided in the first heating electrical main circuit, and the thermal relay FR1 is placed between the contactor KM1 and the first heating device; a thermal relay FR2 is provided in the second heating electrical main circuit, and the thermal relay FR2 is placed between the contactor KM2 and the second heating device; a thermal relay FR3 is provided in the back-blowing device electrical main circuit, and the thermal relay FR3 is placed between the contactor KM3 and the back-blowing device.

[0039] Working process:

[0040] 1. When the conversion switch is in the automatic position, the ambient temperature is detected by the temperature detection device and transmitted to the signal isolation module through a shielded cable. The isolated temperature signal is uploaded to the PLC controller. When the ambient temperature is lower than the set temperature of the touch screen, the PLC controller automatically outputs the KA1-KA2 signal through logical judgment. After KA1 and KA2 are energized, the KM1 and KM2 contactors are energized, and the heating device is energized through the thermal relays FR1 and FR2 to start heating; when the ambient temperature is higher than the set temperature, or the overheating relays FR1 and FR2 are activated, the PLC controller internally makes a logical judgment, the output relays KA1-KA2 lose power, the contactors KM1 and KM2 are disconnected, and the heating device stops heating.

[0041] When the operation of the wheel washing machine for construction waste is completed and the temperature is lower than the set temperature, the PLC controller makes a logical judgment, the output relay KA3 is energized, the contactor KM3 is energized, and the back-blowing device is energized through the thermal relay FR3. The back-blowing device starts to back-blow the wheel washing machine pipeline and the end nozzle to blow away the residual water droplets on the nozzle to ensure smooth flow. When the thermal relay FR3 acts, the PLC controller receives a signal or stops the output of the relay KA3 at a fixed time, the contactor KM3 is disconnected, and the back-blowing device stops running.

[0042] When the PLC controller stops the output of relay KA3 at a fixed time, the output relay KA4 is judged by logic. After KA4 is energized, the solenoid valve of the drainage device is connected through the power supply of fuse FU1, and the drainage device works to drain the residual water droplets in the pipes and nozzles to prevent the nozzles from being blocked or the pipes from bursting due to freezing of water droplets. When the PLC controller stops the output of relay KA4 at a fixed time, the solenoid valve of the drainage device loses power and disconnects, and the drainage device stops working.

[0043] 2. When the manual switch is in the manual position. Click the Start Heating 1 button, the PLC controller receives the signal, through the logic output relay KA1, KM 1 is energized after KA1 is powered, and the first heating device is connected through QF0, QF1, KM1, and FR1 to start working; click the Stop Heating 1 button, the PLC controller receives the signal, through the logic output relay KA1 is de-energized, after KA1 is de-energized, KM1 is disconnected, and the first heating device stops working. Click the Start Heating 2 button, the PLC controller receives the signal, through the logic output relay KA2, KM2 is energized after KA2 is powered, and the second heating device is connected through QF0, QF2, KM2, and FR2 to start working; click the Stop Heating button, the PLC controller receives the signal, through the logic output relay KA2 is de-energized, after KA2 is de-energized, KM2 is disconnected, and the second heating device stops working. Click the start backflush button, the PLC controller receives the signal, through the logic output relay KA3, KA3 is energized, KM3 is energized, the backflush device is connected through QF0, QF3, KM3, FR3 to start working; click the stop backflush button, the PLC controller receives the signal, through the logic output relay KA3 is de-energized, KA3 is de-energized, KM3 is disconnected, and the backflush device stops working. Long press the manual button of the drainage device, the PLC controller receives the signal, through the logic output relay KA4, KA4 is energized, the drainage device is energized through QF0, QF4, FU1 to start working; release the manual button of the drainage device, the PLC controller receives the signal, through the logic output relay KA4, the drainage device stops working.

[0044] It should be noted that the above detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments described in the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0047] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0048] For ease of description, spatially relative terms, such as "above", "above", "on the upper surface of", "above", etc., may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0049] In the above detailed description, reference is made to the accompanying drawings, which form a part of this document. In the accompanying drawings, similar symbols typically identify similar components unless the context indicates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein.

[0050] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A construction waste wheel washer antifreeze control system, characterized in that: The system includes a temperature detection device and a PLC control system. The PLC control system is respectively connected to the temperature detection device, the heating device, the actuator, the back-blowing device and the drainage device. The temperature detection device is arranged on the outer wall of the end of the water pipeline and below the liquid level in the water tank, and is connected to the signal isolator through a shielded cable. After the signal is isolated, it is connected to the PLC control system. The heating device includes a heating rod and a heating belt. The heating rod is arranged at the bottom of the wheel washing machine water tank or the outside of the four side walls. The heating belt is arranged on the outer walls of all water pipelines and the outer walls of the water pump. The actuator is the wheel washing machine control system. The outlet pipeline of the back-blowing device is connected to the outlet of the water pump, and the wind pressure is sent to the end nozzle through the water pipeline. The drainage device is installed at the lowest end of the pipeline.

2. The antifreeze control system for a wheel washer for construction waste according to claim 1 is characterized in that: The back-blowing device is an air compressor.

3. The antifreeze control system for a wheel washer for construction waste according to claim 1 is characterized in that: It also includes a touch screen, which is connected to the PLC control system and is used to display control pages and control the PLC control system.

4. The antifreeze control system for a wheel washer for construction waste according to claim 3 is characterized in that: The PLC control system includes a PLC controller, circuit breakers QF0-QF5, relays KA1-KA4, and contactors KM1-KM3. The PLC controller receives temperature control signals from a temperature detection device and control signals from an operation button to control the power-on operation of a heating device, a back-blowing device, and a drainage device.

5. The antifreeze control system for a wheel washer for construction waste according to claim 4 is characterized in that: The input end of the PLC controller is connected to the operation button and the temperature detection device, and the output end is connected to the relay KA1-KA4 coil and the fault indicator light. The normally open contacts of the relays KA1-KA3 are connected between the contactor KM1-KM3 coils and the power supply, and the normally open contacts of the relay KA4 are connected between the solenoid valve coil YV1 and the power supply.

6. The antifreeze control system for a wheel washer for construction waste according to claim 4, characterized in that: The PLC control system includes a first heating electrical main circuit, a second heating electrical main circuit, a back-blowing device electrical main circuit and a drainage device electrical main circuit, wherein the first heating electrical main circuit is connected to circuit breakers QF0, QF1, contactor KM1 and the first heating device in sequence from the power supply end, the second heating electrical main circuit is connected to circuit breakers QF0, QF2, contactor KM2 and the second heating device in sequence from the power supply end, the back-blowing device electrical main circuit is connected to circuit breakers QF0, QF3, contactor KM3 and the back-blowing device in sequence from the power supply end, and the drainage device electrical main circuit is connected to circuit breakers QF0, QF5, fuse FU1 and the drainage device in sequence from the power supply end.

7. The antifreeze control system for a wheel washer for construction waste according to claim 6, characterized in that: A thermal relay FR1 is provided in the first heating electrical main circuit, and the thermal relay FR1 is placed between the contactor KM1 and the first heating device. A thermal relay FR2 is provided in the second heating electrical main circuit, and the thermal relay FR2 is placed between the contactor KM2 and the second heating device. A thermal relay FR3 is provided in the back-blowing device electrical main circuit, and the thermal relay FR3 is placed between the contactor KM3 and the back-blowing device.

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