Pressure-equalizing ash conveying control device of suction and discharge tank truck

Abstract

The utility model provides a pressure-equalizing ash conveying control device of a suction and discharge tank truck, and belongs to the field of pressure control of suction and discharge tank trucks. The pressure-equalizing ash conveying control device for the suction and discharge tank truck comprises a pressure monitoring module, a flow monitoring module, a first switch, a pressure comparison module, a reference flow module, a flow comparison module, a central control module, a compressor, a vacuum pump, a switch control module and a pressure relief valve, the first switch is respectively connected with the pressure monitoring module, the pressure comparison module and the switch control module; the flow comparison module is respectively connected with the flow monitoring module, the reference flow module and the central control module; the central control module is respectively connected with the pressure comparison module, the compressor, the vacuum pump and the pressure relief valve; the flow monitoring module is connected with the reference flow module; the compressor and the vacuum pump are connected with the switch control module. The safety and reliability of operation of the suction and discharge tank truck can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of pressure control of suction and discharge tank trucks, and in particular to a pressure-equalizing ash conveying control device for suction and discharge tank trucks. Background Art

[0002] With the increasing demand for suction and discharge tank trucks in industrial production and logistics and transportation, the requirements for their operational efficiency, safety, and stability are also increasing. Traditional suction and discharge tank trucks often lack effective pressure monitoring and regulation mechanisms during ash conveying operations, making it difficult to prevent abnormal conditions such as pipeline blockages. These vehicles only address blockages once they occur, which can easily lead to safety accidents.

[0003] Therefore, there is an urgent need for a safe and reliable pressure-equalizing ash conveying control device for suction and discharge tank trucks. Utility Model Content

[0004] The disclosed embodiment provides a pressure-equalizing ash conveying control device for a suction and discharge tank truck to solve the problem of clogging that is prone to occur during the operation of the suction and discharge tank truck.

[0005] The embodiment of the present disclosure provides a pressure-equalizing ash conveying control device for a suction and discharge tank truck, comprising: a pressure monitoring module, a flow monitoring module, a first switch, a pressure comparison module, a reference flow module, a flow comparison module, a central control module, a compressor, a vacuum pump, a switch control module, and a pressure release valve;

[0006] The first switch is connected to the pressure monitoring module, the pressure comparison module and the switch control module respectively;

[0007] The flow comparison module is connected to the flow monitoring module, the reference flow module and the central control module respectively;

[0008] The central control module is respectively connected to the pressure comparison module, the compressor, the vacuum pump and the pressure release valve;

[0009] The flow monitoring module is connected to the reference flow module;

[0010] The compressor and the vacuum pump are both connected to the switch control module.

[0011] In an exemplary embodiment of the present disclosure, the reference flow module includes: a diode D1, a resistor R1, a capacitor C1, an operational amplifier U1, a resistor R2, a resistor R3, a resistor Rf1, an operational amplifier U2, a resistor R4, a resistor R5, a resistor Rf2, and an operational amplifier U3;

[0012] The anode of the diode D1 is connected to the flow monitoring module; the cathode of the diode D1 is grounded via the resistor R1 and the capacitor C1 respectively;

[0013] The first end of the resistor R1 and the first end of the capacitor C1 are both connected to the non-inverting input terminal of the operational amplifier U1;

[0014] The output end of the operational amplifier U1 is connected to the inverting input end of the operational amplifier U1 and the first end of the resistor R2 respectively;

[0015] The non-inverting input terminal of the operational amplifier U2 is grounded via a resistor R3, the inverting input terminal is connected to the second terminal of the resistor R2, and the output terminal is connected to the inverting input terminal of the operational amplifier U2 via a resistor Rf1;

[0016] The output terminal of the operational amplifier U2 is connected to the inverting input terminal of the operational amplifier U3 through the resistor R4;

[0017] The non-inverting input terminal of the operational amplifier U3 is grounded via a resistor R5, and the output terminal is connected to the inverting input terminal of the operational amplifier via a resistor Rf2;

[0018] The second end of the resistor R1 is used for grounding;

[0019] The output end of the operational amplifier U3 is connected to the flow comparison module.

[0020] In an exemplary embodiment of the present disclosure, the pressure comparison module includes: a positive pressure comparator and a negative pressure comparator;

[0021] The positive voltage comparator has a non-inverting input connected to the first switch, an inverting input for receiving a positive voltage reference signal, and an output connected to the central control module;

[0022] The negative pressure comparator has an inverting input terminal connected to the first switch, a non-inverting input terminal for receiving a negative pressure reference signal, and an output terminal connected to the central control module.

[0023] In an exemplary embodiment of the present disclosure, the first switch is a single-pole double-throw switch;

[0024] The fixed end of the first switch is connected to the pressure monitoring module, the first movable end is connected to the non-inverting input end of the positive pressure comparator, the second movable end is connected to the inverting input end of the negative pressure comparator, and the control end is connected to the switch control module;

[0025] The initial state of the first switch is to be connected to the non-inverting input terminal of the positive voltage comparator.

[0026] In an exemplary embodiment of the present disclosure, the central control module includes: a first central control unit and a second central control unit;

[0027] The first central control unit is respectively connected to the output end of the positive pressure comparator, the output end of the negative pressure comparator, the compressor, the vacuum pump and the pressure release valve;

[0028] The second central control unit is connected to the flow comparison module, the compressor, the vacuum pump and the pressure release valve respectively.

[0029] In an exemplary embodiment of the present disclosure, a pressure-equalizing ash conveying control device for a suction and discharge tank truck further includes: an alarm module;

[0030] The alarm module is connected to the first central control unit;

[0031] The alarm module is configured to issue an alarm after receiving the alarm information.

[0032] In an exemplary embodiment of the present disclosure, a pressure-equalizing ash conveying control device for a suction and discharge tank truck further includes: a display module;

[0033] The display module is connected to the pressure monitoring module and the flow monitoring module respectively;

[0034] The display module is configured to display the numerical information sent by the pressure monitoring module and the flow monitoring module.

[0035] In an exemplary embodiment of the present disclosure, a pressure-equalizing ash conveying control device for a suction and discharge tank truck further includes: a storage module;

[0036] The storage module is connected to the pressure monitoring module and the flow monitoring module respectively;

[0037] The storage module is configured to store the numerical information sent by the pressure monitoring module and the flow monitoring module.

[0038] In an exemplary embodiment of the present disclosure, the flow comparison module includes: a flow comparator;

[0039] The non-inverting input terminal of the flow comparator is connected to the reference flow module, the inverting input terminal is connected to the flow monitoring module, and the output terminal is connected to the second central control unit.

[0040] The beneficial effects of the pressure-equalizing ash conveying control device for a suction and discharge tank truck provided by the embodiment of the present disclosure are:

[0041] The present disclosure can monitor the pressure value inside the tank in real time through the pressure monitoring module to ensure that the tank operates within a safe pressure range. The flow monitoring module can monitor the flow value in the pipeline in real time, detect flow anomalies in time, and prevent problems such as blockage. The present disclosure can compare the monitored flow value with the reference flow value through the flow comparison module to adjust the working status of the compressor and the vacuum pump to deal with possible blockage. The reference flow module in this embodiment can set a reference flow value based on the flow monitored by the flow monitoring module, rather than a fixed flow value. Different reference flow values ​​can be set for different substances, thereby improving the safety and reliability of the suction and discharge tanker operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0043] Figure 1 This is a structural diagram of a pressure-equalizing ash conveying control device for a suction and discharge tank truck provided by an embodiment of the present disclosure;

[0044] Figure 2 This is a structural diagram of a second type of pressure-equalizing ash conveying control device for a suction and discharge tank truck provided in an embodiment of the present disclosure;

[0045] Figure 3 This is a schematic diagram of the circuit structure of a reference flow module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] To help those skilled in the art better understand this solution, the following will clearly describe the technical solutions in the embodiments of this solution in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of this solution, not all of it. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of this solution.

[0047] Throughout the specification, claims, and accompanying figures of this solution, the term "including" and any variations thereof mean "including, but not limited to," and are intended to cover non-exclusive inclusions and are not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish between different objects, not to describe a specific order.

[0048] The following describes the implementation of the present disclosure in detail with reference to the accompanying drawings:

[0049] Figure 1 This is a structural schematic diagram of a pressure-equalizing ash conveying control device for a suction and discharge tank truck provided in an embodiment of the present disclosure. Figure 2 This is a structural diagram of the second type of pressure-equalizing ash conveying control device for a suction and discharge tank truck provided by the present disclosure. Figure 1 and Figure 2 The pressure-equalizing ash conveying control device for a suction and discharge tank truck includes: a pressure monitoring module 10, a flow monitoring module 11, a first switch 12, a pressure comparison module 13, a reference flow module 14, a flow comparison module 15, a central control module 16, a compressor 17, a vacuum pump 18, a switch control module 19 and a pressure relief valve 20;

[0050] The first switch 12 is connected to the pressure monitoring module 10, the pressure comparison module 13 and the switch control module 19 respectively;

[0051] The flow comparison module 15 is connected to the flow monitoring module 11, the reference flow module 14 and the central control module 16 respectively;

[0052] The central control module 16 is connected to the pressure comparison module 13, the compressor 17, the vacuum pump 18 and the pressure relief valve 20 respectively;

[0053] The flow monitoring module 11 is connected to the reference flow module 14;

[0054] The compressor 17 and the vacuum pump 18 are both connected to the switch control module 19 .

[0055] In one embodiment of the present disclosure, the pressure comparison module 13 includes: a positive pressure comparator 131 and a negative pressure comparator 132;

[0056] The positive voltage comparator 131 has a non-inverting input terminal connected to the first switch 12 , an inverting input terminal for receiving a positive voltage reference signal, and an output terminal connected to the central control module 16 ;

[0057] The negative pressure comparator 132 has an inverting input terminal connected to the first switch 12 , a non-inverting input terminal for receiving a negative pressure reference signal, and an output terminal connected to the central control module 16 .

[0058] In this embodiment, the pressure monitoring module 10 is configured to monitor the pressure value inside the tank of the suction and discharge tank truck and send the pressure value to the pressure comparison module 13 through the first switch 12 .

[0059] The pressure comparison module 13 is configured to compare the pressure value sent by the pressure monitoring module 10 with a preset pressure value, and send the comparison result to the central control module 16 .

[0060] The flow monitoring module 11 is configured to monitor the flow value in the ash conveying pipeline and send the monitored flow value to the reference flow module 14 and the flow comparison module 15 respectively.

[0061] The reference flow module 14 is configured to send a reference flow value to the flow comparison module 15 according to the flow value sent by the flow monitoring module 11 .

[0062] The flow comparison module 15 is configured to compare the flow value monitored by the flow monitoring module 11 with a reference flow value, and send the comparison result to the central control module 16 .

[0063] The central control module 16 is configured to control the actions of the compressor 17, the vacuum pump 18 and the pressure relief valve 20 according to the comparison results sent by the pressure comparison module 13; and to control the actions of the compressor 17, the vacuum pump 18 and the pressure relief valve 20 according to the comparison results sent by the flow comparison module 15.

[0064] The compressor 17 is configured to provide positive pressure. The vacuum pump 18 is configured to provide negative pressure. The pressure relief valve 20 is configured to release pressure within the tank. The switch control module 19 is configured to control the direction of the first switch 12 based on the operating status of the compressor 17 and the vacuum pump 18.

[0065] Specifically, the pressure monitoring module 10 may be a pressure sensor, which may monitor the pressure condition in the tank in real time and send the monitored pressure value to the pressure comparison module 13 via the first switch 12 .

[0066] The pressure comparison module 13 can have two groups of comparators, namely a positive pressure comparator 131 and a negative pressure comparator 132, which are respectively connected to the first moving end and the second moving end of the first switch 12. The two groups of comparators are used to compare the pressure values ​​during the ash conveying and ash suction processes. The guidance of the first switch 12 is controlled by the switch control module 19.

[0067] The flow monitoring module 11 may be an electromagnetic flow meter, which may monitor the flow value in the pipeline in real time and send the monitored flow value to the reference flow module 14 and the flow comparison module 15 .

[0068] For example, a suction and discharge tank truck is in the ash discharge state. Compressor 17 is operating to discharge the ash from the tank. Switch control module 19 detects compressor 17 operating and controls first switch 12 to connect to positive pressure comparator 131. Positive pressure comparator 131 is preset to a pressure value of 0.08 MPa. Flow monitoring module 11 detects a flow rate of 15 cubic meters per minute. Reference flow module 14 reduces this value by a preset ratio and uses it as the reference flow rate for flow comparison module 15. Specifically, the preset ratio is 80%, so the reference flow rate for flow comparison module 15 is 12 cubic meters per minute.

[0069] At this time, the pressure value monitored by the pressure monitoring module 10 is 0.05MPa, and the flow value monitored by the flow monitoring module 11 is 13 cubic meters / minute. At this time, since 0.05MPa is less than the preset pressure value of 0.08MPa and 13 cubic meters / minute is greater than the reference flow value of 12 cubic meters / minute, the operating parameters are normal and the operation continues. After a period of time, the pressure value monitored by the pressure monitoring module 10 is 0.06MPa, and the flow value monitored by the flow monitoring module 11 is 11 cubic meters / minute. Although the pressure value of 0.06MPa monitored by the pressure monitoring module 10 does not reach the preset value of 0.08MPa, since the monitored flow value of 11 cubic meters / minute is less than the preset reference flow value of 12 cubic meters / minute, there may be a slight blockage in the pipeline at this time. The flow monitoring module 11 sends "1" to the central control module 16. At this time, the central control module 16 controls the compressor 17 to increase the power as soon as possible to try to suck in the blocked ash material. The first time is a preset time, which may be 5 seconds. After 5 seconds, the compressor 17 resumes its original power operation. The first time may be controlled by a timer built into the central control module 16 .

[0070] After a period of time, the pressure value monitored by the pressure monitoring module 10 is 0.085 MPa. At this time, since 0.085 MPa is greater than the preset value of 0.08 MPa, the pressure comparison module 13 sends a "1" to the central control module 16. The central control module 16 controls the compressor 17 to stop working immediately and controls the pressure relief valve 20 to open to release the internal pressure of the tank.

[0071] From the above, it can be concluded that the present disclosure can monitor the pressure value in the tank in real time through the pressure monitoring module 10 to ensure that the tank operates within a safe pressure range. The flow monitoring module 11 can monitor the flow value in the pipeline in real time, detect flow anomalies in time, and prevent the occurrence of problems such as blockage. The present disclosure can adjust the working status of the compressor 17 and the compression pump 18 according to the comparison of the monitored flow value and the reference flow value through the flow comparison module 15 to deal with possible blockage. The reference flow module 14 in this embodiment can set a reference flow value based on the flow monitored by the flow monitoring module 11, rather than a fixed flow value. Different reference flow values ​​can be set for different substances, thereby improving the safety and reliability of the suction and discharge tanker operation.

[0072] Figure 2 This is a structural diagram of a second type of pressure-equalizing ash conveying control device for a suction and discharge tank truck provided in an embodiment of the present disclosure; Figure 3 This is a circuit diagram of a reference flow module provided by an embodiment of the present disclosure. Figure 2 and Figure 3 .

[0073] In one embodiment of the present disclosure, the reference flow module 14 includes: a diode D1, a resistor R1, a capacitor C1, an operational amplifier U1, a resistor R2, a resistor R3, a resistor Rf1, an operational amplifier U2, a resistor R4, a resistor R5, a resistor Rf2, and an operational amplifier U3;

[0074] The anode of the diode D1 is connected to the flow monitoring module 11; the cathode of the diode D1 is grounded through the resistor R1 and the capacitor C1 respectively;

[0075] The first end of the resistor R1 and the first end of the capacitor C1 are both connected to the non-inverting input terminal of the operational amplifier U1;

[0076] The output terminal of the operational amplifier U1 is connected to the inverting input terminal of the operational amplifier U1 and the first terminal of the resistor R2 respectively;

[0077] The non-inverting input terminal of the operational amplifier U2 is grounded via a resistor R3, the inverting input terminal is connected to the second terminal of the resistor R2, and the output terminal is connected to the inverting input terminal of the operational amplifier U2 via a resistor Rf1;

[0078] The output terminal of the operational amplifier U2 is connected to the inverting input terminal of the operational amplifier U3 through the resistor R4;

[0079] The non-inverting input terminal of the operational amplifier U3 is grounded via a resistor R5, and the output terminal is connected to the inverting input terminal of the operational amplifier via a resistor Rf2;

[0080] The second end of the resistor R1 is used for grounding;

[0081] The output end of the operational amplifier U3 is connected to the flow comparison module.

[0082] In this embodiment, the flow monitoring module 11 outputs a voltage signal to charge the capacitor C1. When the voltage across the capacitor C1 rises to a value equal to the peak value of the voltage signal, the voltage across the capacitor C1 no longer increases. Because the voltage signal output by the flow monitoring module 11 is relatively weak and easily affected by the environment or electromagnetic fields, the capacitor C1 and the resistor R1 act as a filter, and the voltage across the capacitor C1 remains at the peak value of the voltage signal output by the flow monitoring module 11. The operational amplifier U1 constitutes a voltage follower, which matches the impedances of the front and rear stages.

[0083] That is, the output end of the operational amplifier U1 always outputs the maximum flow value sent by the flow monitoring module 11. For different objects, the working power and flow of the same compressor 17 or vacuum pump 18 are different, so the same flow value cannot be used for judgment. Therefore, the value actually monitored by the flow monitoring module 11 is used as the reference flow signal.

[0084] However, considering that the maximum flow value may be instantaneous and may not be at the maximum flow value at all times, the output end of the operational amplifier U1 is connected to the operational amplifier U2 through the resistor R2. The operational amplifier U2 inverts the input signal and returns the amplified signal to the negative input end. According to the negative feedback principle, the output signal depends on the open-loop gain of the operational amplifier U2. The open-loop gain of the operational amplifier U2 is A1=-RF1 / R2. For example, if the output value of the operational amplifier U1 is 15 and A1=-0.8, the output after passing through the operational amplifier U2 is -12. Although the peak value is reduced, the positive and negative signs are inverted, so the signal value can be inverted again through the operational amplifier U3.

[0085] In this embodiment, the resistance of resistor R4 is equal to the resistance of resistor Rf2, so the open-loop gain of operational amplifier U3 is A2=-1. At this time, the value of operational amplifier U2 becomes 12 after passing through operational amplifier U3, and the magnitude remains unchanged. It is only inverted and output.

[0086] In this embodiment, the amplification gain of the operational amplifier U2 can be changed by adjusting the resistance values ​​of the resistor Rf1 and the resistor R2.

[0087] From the above, it can be concluded that, in the present disclosure, through the combination of diode D1, resistor R1, capacitor C1 and operational amplifier U1, the reference flow module 14 can capture and maintain the peak value of the voltage signal output by the flow monitoring module 11. The reference flow value can be adjusted according to the flow value, which improves the applicability of the present disclosure. In the present disclosure, through the cascade use of operational amplifier U2 and operational amplifier U3, the reference flow module 14 can adjust the output flow reference value as needed. The operational amplifier U2 realizes the amplification and inversion of the signal through the negative feedback principle, while the operational amplifier U3 inverts the signal again, thereby obtaining a reference value that is proportional to the original peak flow but adjusted. The amplification gain of the reference flow module 14 can be changed by adjusting the resistance values ​​of resistor Rf1 and resistor R2, so that the module is easy to calibrate and adjust to adapt to different working conditions and requirements, thereby improving the safety and reliability of the suction and discharge tanker operation.

[0088] Figure 2 This is a structural diagram of a second type of pressure-equalizing ash conveying control device for a suction and discharge tank truck provided in an embodiment of the present disclosure; Figure 3 This is a circuit diagram of a reference flow module provided by an embodiment of the present disclosure. Figure 2 and Figure 3 .

[0089] In one embodiment of the present disclosure, the first switch 12 is a single-pole double-throw switch;

[0090] The fixed end of the first switch 12 is connected to the pressure monitoring module 10, the first movable end is connected to the non-inverting input end of the positive pressure comparator 131, the second movable end is connected to the inverting input end of the negative pressure comparator 132, and the control end is connected to the switch control module 19;

[0091] The first switch 12 is initially connected to the non-inverting input terminal of the positive voltage comparator 131 .

[0092] In one embodiment of the present disclosure, the central control module 16 includes: a first central control unit 161 and a second central control unit 162;

[0093] The first central control unit 161 is respectively connected to the output end of the positive pressure comparator 131, the output end of the negative pressure comparator 132, the compressor 17, the vacuum pump 18 and the pressure release valve 20;

[0094] The second central control unit 162 is connected to the flow comparison module 15 , the compressor 17 , the vacuum pump 18 and the pressure release valve 20 respectively.

[0095] In one embodiment of the present disclosure, a pressure-equalizing ash conveying control device for a suction and discharge tank truck further includes: an alarm module 21;

[0096] The alarm module 21 is connected to the first central control unit 161;

[0097] The alarm module 21 is configured to issue an alarm after receiving the alarm information.

[0098] In one embodiment of the present disclosure, a pressure-equalizing ash conveying control device for a suction and discharge tank truck further includes: a display module 22;

[0099] The display module 22 is connected to the pressure monitoring module 10 and the flow monitoring module 11 respectively;

[0100] The display module 22 is configured to display the numerical information sent by the pressure monitoring module 10 and the flow monitoring module 11 .

[0101] In one embodiment of the present disclosure, a pressure-equalizing ash conveying control device for a suction and discharge tank truck further includes: a storage module 23;

[0102] The storage module 23 is connected to the pressure monitoring module 10 and the flow monitoring module 11 respectively;

[0103] The storage module 23 is configured to store the numerical information sent by the pressure monitoring module 10 and the flow monitoring module 11 .

[0104] In one embodiment of the present disclosure, the flow comparison module 15 includes: a flow comparator 151;

[0105] The flow comparator 151 has a non-inverting input terminal connected to the reference flow module 14 , an inverting input terminal connected to the flow monitoring module 11 , and an output terminal connected to the second central control unit 162 .

[0106] In this embodiment, the first switch 12 is a single-pole double-throw switch, and the direction of the first switch 12 is controlled by the switch control module 19. The switch control module 19 is configured to control the first switch 12 to turn on the positive pressure comparator 131 when the compressor 17 is working, and to control the first switch 12 to turn on the negative pressure comparator 132 when the vacuum pump 18 is working.

[0107] In this embodiment, the compressor 17 and the vacuum pump 18 will not work at the same time, because positive pressure is used in the ash discharge process of the suction and discharge tank truck, that is, the compressor 17 is working, and negative pressure is used in the ash suction process of the suction and discharge tank truck, that is, the vacuum pump 18 is working.

[0108] The first central control unit 161 is configured to receive a signal “1”, control the compressor 17 or the vacuum pump 18 to start immediately, and control the pressure relief valve 20 to open to release the tank pressure.

[0109] The second central control unit 162 is configured to receive “1” and control the compressor 17 or the vacuum pump 18 to increase power.

[0110] The first central control unit 161 is further configured to send an alarm message to the alarm module 21 upon receiving “1”.

[0111] For example, as the suction tank truck prepares to begin ash suction operations, vacuum pump 18 begins operating. As vacuum pump 18 continuously extracts air from the tank, a negative pressure environment gradually forms inside the tank. The pressure monitoring module 10 monitors the continuous decrease in pressure in real time and transmits this pressure information to the display module 22 for display, allowing the operator to intuitively see the current pressure situation inside the tank. It also transmits this information to the storage module 23 for storage, facilitating subsequent review of historical data and analysis of pressure changes during the ash suction process. Simultaneously, the flow monitoring module 11 also monitors the flow rate of the inhaled ash and transmits this flow rate information to the display module 22 and storage module 23.

[0112] During the dust suction process, assuming that the pipeline is slightly blocked, the flow value monitored by the flow detection module 11 is less than the reference flow value sent by the reference flow module to the flow comparator 151. At this time, the flow comparator sends "1" to the second central control unit 162. At this time, the second central control unit controls the vacuum pump 18 to increase the power within the first time and try to suck the blockage into the pipe body. The length of the first time can be controlled by the built-in timer of the second central control unit.

[0113] Alternatively, for example, if the pressure monitoring module 10 detects that the negative pressure value inside the tank exceeds a preset negative pressure signal, the negative pressure comparator 132 will output a "1" signal. Upon receiving the "1" signal, the first central control unit 161 will immediately control the vacuum pump 18 to stop working (to prevent the negative pressure from further increasing abnormally and causing damage to the tank, etc.), and simultaneously control the pressure relief valve 20 to open, releasing some of the negative pressure inside the tank and restoring it to a reasonable pressure range. The first central control unit 161 will also send an alarm message to the alarm module 21. Upon receiving the message, the alarm module 21 will issue an alarm through sound and light (for example, sounding an alarm and lighting a warning light), prompting the operator that an abnormal negative pressure condition has occurred and needs to be checked and handled.

[0114] From the above, it can be concluded that the present disclosure controls the compressor 17 or the vacuum pump 18 to perform different actions respectively through the first central control unit 161 and the second central control unit 162, thereby avoiding the reduction of work efficiency caused by false touch, and the alarm module 21 can promptly remind relevant personnel when an abnormal situation is detected. At the same time, the display module 22 can display the numerical information sent by the pressure monitoring module 10 and the flow monitoring module 11 in real time, so that the operator can intuitively understand the pressure and flow conditions in the tank body, and facilitate timely adjustment and intervention. The storage module 23 can store the numerical information sent by the pressure monitoring module 10 and the flow monitoring module 11, which provides convenience for subsequent viewing of historical data and analysis of pressure changes in the ash suction process, helps operators better understand the operating status of the suction and discharge tank truck, optimizes operating parameters, improves operating efficiency, and enhances the safety and reliability of the suction and discharge tank truck operation.

[0115] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A pressure-equalizing ash conveying control device for a suction and discharge tank truck, characterized in that: include: A pressure monitoring module, a flow monitoring module, a first switch, a pressure comparison module, a reference flow module, a flow comparison module, a central control module, a compressor, a vacuum pump, a switch control module, and a pressure relief valve; The first switch is connected to the pressure monitoring module, the pressure comparison module and the switch control module respectively; The flow comparison module is connected to the flow monitoring module, the reference flow module and the central control module respectively; The central control module is respectively connected to the pressure comparison module, the compressor, the vacuum pump and the pressure release valve; The flow monitoring module is connected to the reference flow module; The compressor and the vacuum pump are both connected to the switch control module.

2. The pressure-equalizing ash conveying control device for a suction and discharge tank truck according to claim 1, characterized in that: The reference flow module includes: a diode D1, a resistor R1, a capacitor C1, an operational amplifier U1, a resistor R2, a resistor R3, a resistor Rf1, an operational amplifier U2, a resistor R4, a resistor R5, a resistor Rf2 and an operational amplifier U3; The anode of the diode D1 is connected to the flow monitoring module; the cathode of the diode D1 is grounded via the resistor R1 and the capacitor C1 respectively; The first end of the resistor R1 and the first end of the capacitor C1 are both connected to the non-inverting input terminal of the operational amplifier U1; The output end of the operational amplifier U1 is connected to the inverting input end of the operational amplifier U1 and the first end of the resistor R2 respectively; The non-inverting input terminal of the operational amplifier U2 is grounded via a resistor R3, the inverting input terminal is connected to the second terminal of the resistor R2, and the output terminal is connected to the inverting input terminal of the operational amplifier U2 via a resistor Rf1; The output terminal of the operational amplifier U2 is connected to the inverting input terminal of the operational amplifier U3 through the resistor R4; The non-inverting input terminal of the operational amplifier U3 is grounded via a resistor R5, and the output terminal is connected to the inverting input terminal of the operational amplifier via a resistor Rf2; The second end of the resistor R1 is used for grounding; The output end of the operational amplifier U3 is connected to the flow comparison module.

3. The pressure-equalizing ash conveying control device for a suction and discharge tank truck according to claim 1, characterized in that: The pressure comparison module includes: a positive pressure comparator and a negative pressure comparator; The positive voltage comparator has a non-inverting input connected to the first switch, an inverting input for receiving a positive voltage reference signal, and an output connected to the central control module; The negative pressure comparator has an inverting input terminal connected to the first switch, a non-inverting input terminal for receiving a negative pressure reference signal, and an output terminal connected to the central control module.

4. The pressure-equalizing ash conveying control device for a suction and discharge tank truck according to claim 3, characterized in that: The first switch is a single-pole double-throw switch; The fixed end of the first switch is connected to the pressure monitoring module, the first movable end is connected to the non-inverting input end of the positive pressure comparator, the second movable end is connected to the inverting input end of the negative pressure comparator, and the control end is connected to the switch control module; The initial state of the first switch is to be connected to the non-inverting input terminal of the positive voltage comparator.

5. The pressure-equalizing ash conveying control device for a suction and discharge tank truck according to claim 3, characterized in that: The central control module includes: a first central control unit and a second central control unit; The first central control unit is respectively connected to the output end of the positive pressure comparator, the output end of the negative pressure comparator, the compressor, the vacuum pump and the pressure release valve; The second central control unit is connected to the flow comparison module, the compressor, the vacuum pump and the pressure release valve respectively.

6. The pressure-equalizing ash conveying control device for a suction and discharge tank truck according to claim 5, characterized in that: Also includes: Alarm module; The alarm module is connected to the first central control unit; The alarm module is configured to issue an alarm after receiving the alarm information.

7. The pressure-equalizing ash conveying control device for a suction and discharge tank truck according to claim 1, characterized in that: Also includes: Display module; The display module is connected to the pressure monitoring module and the flow monitoring module respectively; The display module is configured to display the numerical information sent by the pressure monitoring module and the flow monitoring module.

8. The pressure-equalizing ash conveying control device for a suction and discharge tank truck according to claim 1, characterized in that: Also included: a storage module; The storage module is connected to the pressure monitoring module and the flow monitoring module respectively; The storage module is configured to store the numerical information sent by the pressure monitoring module and the flow monitoring module.

9. The pressure-equalizing ash conveying control device for a suction and discharge tank truck according to claim 5, characterized in that: The flow comparison module includes: a flow comparator; The non-inverting input terminal of the flow comparator is connected to the reference flow module, the inverting input terminal is connected to the flow monitoring module, and the output terminal is connected to the second central control unit.

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