Cooling system, control method and mixer truck

Abstract

The invention relates to the technical field of transportation tank truck cooling, and provides a cooling system, a control method and a mixer lorry. The cooling system comprises a cooling gas circuit connected with a brake gas storage device; the spraying device is connected with the cooling gas circuit, the cooling gas circuit is used for conveying the gas in the brake gas storage device to the spraying device, and the spraying device sprays the gas conveyed by the cooling gas circuit into a tank body of the transportation tank car so as to promote circulation of air in the tank body and air in the environment; and the controller is in communication connection with the cooling gas circuit and the braking gas circuit and used for controlling connection or disconnection of the cooling gas circuit according to the gas pressure of the braking gas circuit so as to achieve efficient and energy-saving cooling of the tank body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling of transport tank trucks, in particular to a cooling system and a control method, and a mixer truck. BACKGROUND

[0002] In a high-temperature environment, the concrete in the tank body of the concrete mixer truck is prone to accelerated slump loss and abnormal setting time, resulting in poor compactness and uneven strength of the structure after pouring, which seriously affects the durability of the project.

[0003] Currently, the tank body is cooled by spraying the outer wall or adding a circulating cooling pipeline to the air conditioning system to inhibit high-temperature deterioration. However, the spraying method has low heat conduction efficiency and limited cooling effect, and the air conditioning system significantly increases additional fuel consumption or electricity consumption, which is difficult to adapt to the current green and low-carbon building energy-saving development trend. SUMMARY

[0004] The embodiments of the present application provide a cooling system and a control method, and a mixer truck, which can realize efficient and energy-saving cooling of the tank body.

[0005] In a first aspect, the embodiments of the present application provide a cooling system applied to a gas pressure brake transport tank truck, the transport tank truck having a brake gas storage device and a brake gas circuit connected to the brake gas storage device, the brake gas circuit being used to deliver gas in the brake gas storage device to a brake chamber to perform braking, the cooling system comprising: a cooling gas circuit connected to the brake gas storage device; a spraying device connected to the cooling gas circuit, used to deliver gas in the brake gas storage device to the spraying device, and the spraying device sprays the gas delivered by the cooling gas circuit into the tank body of the transport tank truck to promote the circulation of air in the tank body and air in the environment; and a controller in communication connection with the cooling gas circuit and the brake gas circuit, used to control the conduction or disconnection of the cooling gas circuit according to the gas pressure of the brake gas circuit.

[0006] In combination with the first aspect, in some implementations of the first aspect, the cooling system further comprises: an environmental temperature detection device in communication connection with the controller, used to detect the environmental temperature; and a running time determination device of the transport tank truck in communication connection with the controller, the controller obtains the continuous running time of the transport tank truck through the running time determination device, and the controller controls the conduction or disconnection of the cooling gas circuit according to the environmental temperature and the continuous running time of the transport tank truck.

[0007] In combination with the first aspect, in some implementations of the first aspect, the cooling system further comprises: a gas pressure compensation device provided on the cooling gas circuit, used to compensate the gas pressure of the gas delivered by the cooling gas circuit; and the gas pressure compensation device is in communication connection with the controller, and the controller controls the start or stop of the gas pressure compensation device.

[0008] With reference to the first aspect, in some implementations of the first aspect, the spraying device includes a plurality of spiral nozzles arranged in an array, and a spiral guide vane is arranged in each spiral nozzle to form a vortex airflow.

[0009] With reference to the first aspect, in some implementations of the first aspect, the transport tank vehicle includes a concrete mixer truck, and the concrete mixer truck includes a feeding hopper connected to a tank body of the concrete mixer truck, and the spraying device is arranged at an edge of the feeding hopper so as to spray the gas delivered by the cooling gas circuit into the tank body of the concrete mixer truck.

[0010] In a second aspect, the embodiments of the present application further provide a control method, which is applied to a controller of any cooling system according to the first aspect, and the control method includes: obtaining the air pressure of the brake gas circuit; determining whether the air pressure of the brake gas circuit meets a normal braking condition; and controlling the cooling gas circuit of the cooling system to be conducted if the air pressure of the brake gas circuit meets the normal braking condition.

[0011] With reference to the second aspect, in some implementations of the second aspect, the cooling system further includes an ambient temperature detection device, the ambient temperature detection device is in communication connection with the controller, the controller is further in communication connection with a running time determination device of the transport tank vehicle, and the controlling the cooling gas circuit of the cooling system to be conducted if the air pressure of the brake gas circuit meets the normal braking condition includes: obtaining the ambient temperature by the ambient temperature detection device and obtaining the continuous running time of the transport tank vehicle by the running time determination device; determining whether the ambient temperature and the continuous running time of the transport tank vehicle meet a cooling condition; and controlling the cooling gas circuit to be conducted if the air pressure of the brake gas circuit meets the normal braking condition and the ambient temperature and the continuous running time of the transport tank vehicle meet the cooling condition.

[0012] With reference to the second aspect, in some implementations of the second aspect, the cooling system further includes an ambient temperature detection device, the ambient temperature detection device is in communication connection with the controller, and the controlling the cooling gas circuit of the cooling system to be conducted if the air pressure of the brake gas circuit meets the normal braking condition includes: obtaining the ambient temperature by the ambient temperature detection device; controlling the spraying device of the cooling system to spray intermittently if the air pressure of the brake gas circuit meets the normal braking condition and the ambient temperature meets a first temperature range; and controlling the spraying device to spray continuously if the air pressure of the brake gas circuit meets the normal braking condition and the ambient temperature meets a second temperature range, wherein a minimum value in the second temperature range is greater than a maximum value in the first temperature range.

[0013] With reference to the second aspect, in some implementations of the second aspect, the cooling system further comprises a gas pressure compensation device, which is arranged on the cooling gas circuit and configured to compensate the gas pressure of the gas delivered by the cooling gas circuit; the gas pressure compensation device is in communication connection with the controller, and the control method further comprises: if the gas pressure of the brake gas circuit meets the normal braking condition and the ambient temperature meets the second temperature range, starting the gas pressure compensation device, and increasing the pressure of the gas in the cooling gas circuit to the set pressure based on the set increment.

[0014] In a third aspect, the embodiments of the present application further provide a mixer truck, which is a gas pressure braking transport tank truck, and the mixer truck comprises the cooling system of any one of the first aspect.

[0015] The cooling system provided by the embodiments of the present application directly cools the inside of the transport tank truck by reusing the existing gas pressure braking gas source of the vehicle. The system intelligently controls the on-off of the cooling gas circuit by monitoring the gas pressure of the brake gas circuit in real time, ensures that the brake gas source prioritizes the braking function of the vehicle, and thus realizes efficient reuse of energy and energy-saving operation on the premise of absolutely ensuring driving safety. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description of embodiments of the present application, taken in conjunction with the accompanying drawings. The drawings provided in the specification and the embodiments of the present application together serve to provide a further understanding that enables one of ordinary skill in the art to make and use the present application. The drawings provided are for illustrative purposes and are not intended to limit the present application. In the drawings, the same reference numerals generally refer to the same components or steps throughout the drawings.

[0017] Figure 1 FIG. 1 is a structural schematic diagram of a cooling system provided by an embodiment of the present application.

[0018] Figure 2 FIG. 2 is a structural schematic diagram of a spiral nozzle provided by an embodiment of the present application.

[0019] Figure 3 FIG. 3 is a schematic diagram of the installation position of a spraying device provided by an embodiment of the present application.

[0020] Figure 4 FIG. 4 is a structural schematic diagram of another cooling system provided by an embodiment of the present application.

[0021] Figure 5 FIG. 5 is a structural schematic diagram of another cooling system provided by an embodiment of the present application.

[0022] Figure 6 FIG. 6 is a flow schematic diagram of a control method provided by an embodiment of the present application.

[0023] Figure 7is a structural schematic diagram of another cooling system provided by an embodiment of the present application.

[0024] Figure 8 is a structural schematic diagram of a mixer truck provided by an embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0026] Before introducing the cooling system provided by an embodiment of the present application, the related concepts and application overview involved in the embodiment of the present application are introduced as follows.

[0027] Pneumatic braking is a system that uses compressed air to achieve braking. The gas pressure is transmitted to the brake chamber through the brake gas circuit, and finally the braking force is generated to slow down or stop the vehicle. In this system, the brake gas storage device serves as the core gas source, which is responsible for storing compressed air and maintaining the required pressure of the system. The brake gas storage device stores gas, which can be compressed air or other inert gas. The specific selection can be made according to the actual braking requirements and cost control of the transport tank truck. The brake gas circuit is used to deliver the gas in the brake gas storage device to the brake chamber. During the driving of the transport tank truck, the brake gas storage device is connected with the brake gas circuit to provide stable and reliable gas source support for the brake gas circuit.

[0028] The transport tank truck refers to a special vehicle used for transporting various liquid, gaseous or solid materials, which can be a concrete mixer truck, a powder and particle material transport truck, a liquid food transport truck, etc. Among them, the concrete mixer truck as a typical representative, the concrete loaded in its tank body is prone to performance degradation due to temperature rise in high temperature environment, so the cooling demand is particularly prominent.

[0029] The cooling system provided by the embodiment of the present application is just for the characteristics of such pneumatic braking transport tank truck. By constructing an independent cooling gas circuit, the reuse of the gas source of the brake gas storage device is realized. Specifically, under the premise of not affecting the braking performance, the controller dynamically controls the operating state of the cooling gas circuit, so that the compressed air in the brake gas storage device is delivered to the jet device through the cooling gas circuit. After the jet device sprays the gas flow into the tank body, the gas flow disturbance is formed, realizing the convection exchange between the high-temperature air in the tank body and the external environment, thereby taking away the heat in the tank body.

[0030] The cooling system provided by the embodiment of the present application will be illustrated by examples as follows. Figures 1 to 5 The cooling system provided by the embodiment of the present application will be illustrated by examples as follows.

[0031] Figure 1 is a structural schematic diagram of a cooling system provided by an embodiment of the present application. The cooling system provided by the embodiment of the present application is applied to a transport tank car of air brake, the transport tank car has a brake gas storage device and a brake gas circuit connected with the brake gas storage device, the brake gas circuit is used for conveying gas in the brake gas storage device to a brake chamber to perform braking. Referring to Figure 1 The cooling system provided by the embodiment of the present application comprises a cooling gas circuit 110, a spraying device 120 and a controller 130.

[0032] The cooling gas circuit 110 is connected with the brake gas storage device 140; the spraying device 120 is connected with the cooling gas circuit 110, the cooling gas circuit 110 is used for conveying gas in the brake gas storage device 140 to the spraying device 120, the spraying device 120 sprays the gas conveyed by the cooling gas circuit 110 into a tank body of the transport tank car, so as to promote the flow of air in the tank body and air in the environment; the controller 130 is communicatively connected with the cooling gas circuit 110 and the brake gas circuit 150, and is used for controlling the conduction or disconnection of the cooling gas circuit 110 according to the air pressure of the brake gas circuit 150.

[0033] The brake gas storage device and the brake gas circuit belong to the existing brake system of the transport tank car, and the embodiment of the present application does not limit this. The newly added cooling gas circuit, spraying device and controller are introduced below.

[0034] The cooling gas circuit refers to a gas flow path for connecting the brake gas storage device and the spraying device, and is used for conveying gas in the brake gas storage device to the spraying device. The embodiment of the present application does not limit the constituting form of the cooling gas circuit. For example, when the spraying device is one, the cooling gas circuit can be constituted by one pipeline; when the spraying device is multiple, the cooling gas circuit can be constituted by one main pipeline and a plurality of branch pipelines, one end of the main pipeline is connected with a gas outlet of the brake gas storage device, the other end is in communication with a gathering place of the branch pipelines, and the ends of the branch pipelines are respectively and sealingly connected with gas inlets of the spraying devices.

[0035] The connection mode of the cooling gas circuit and the brake gas storage device can be to separately open a gas outlet on the gas storage cylinder of the brake gas storage device, and the outlet is directly connected with the pipeline of the cooling gas circuit through a pipeline. This mode can reduce the modification of the original structure of the brake gas circuit, and reduce the modification difficulty and cost. At the same time, in order to realize the control of the controller on the conduction or disconnection of the cooling gas circuit, an electromagnetic valve is further arranged on the cooling gas circuit, and the electromagnetic valve is in communication connection with the controller. The controller controls the conduction or disconnection of the cooling gas circuit by controlling the on-off state of the electromagnetic valve. When the electromagnetic valve is powered on, the valve core is opened, the cooling gas circuit is conducted, and the gas can flow from the brake gas storage device to the injection device; when the electromagnetic valve is powered off, the valve core is closed, the cooling gas circuit is disconnected, and the gas stops being delivered. The selection of the electromagnetic valve needs to consider parameters such as working pressure range, response speed and temperature resistance performance, so as to ensure that it can work reliably under the complex working conditions of the transport tank vehicle.

[0036] In order to simplify the connection of the cooling gas circuit and the brake gas storage device, the cooling gas circuit and the brake gas circuit are communicated with the brake gas storage device through a three-way electromagnetic valve. This mode can reduce the opening of an additional interface. One interface of the three-way electromagnetic valve is connected with the gas outlet of the brake gas storage device, and the other two interfaces are respectively connected with the brake gas circuit and the cooling gas circuit. The controller controls the switching direction of the valve core of the three-way electromagnetic valve to realize the gas source distribution of the brake gas circuit and the cooling gas circuit. When the vehicle needs to brake, the controller controls the three-way electromagnetic valve to preferentially guide the gas source to the brake gas circuit; when the brake demand is met and the cooling function needs to be started, the controller controls the valve core to switch to the state that the brake gas circuit and the cooling gas circuit are simultaneously conducted, so that the gas is supplied to the brake gas circuit and the cooling gas circuit at the same time.

[0037] In order to ensure the stability and safety of gas delivery, a check valve and a pressure regulating valve can be arranged on the cooling gas circuit in sequence. The check valve is used to prevent the backflow of the gas to the brake gas storage device, so as to avoid affecting the gas pressure stability of the brake gas circuit; the pressure regulating valve can set the gas delivery pressure according to the actual demand, so as to prevent damage to the injection device or the internal structure of the tank caused by too high pressure.

[0038] The spray device is the execution component for directly spraying the gas delivered by the cooling gas circuit into the tank body, and the structure design directly affects the cooling effect. Alternatively, the spray device can be a multi-hole spray assembly composed of multiple straight pipe nozzles. The straight pipe nozzles have no flow guide structure inside, and the gas is directly sprayed out of the straight pipe to form a columnar gas flow, which is suitable for directional cooling of local areas. In addition, the spray device can also use an atomizing nozzle to form a gas-water mixed mist flow by mixing the gas with a small amount of atomized water, and further improve the cooling effect by using water mist evaporation to absorb heat. The atomized water can reuse the water in the self-contained water tank of the concrete mixer truck. By adding a micro water pump and a flow control valve, the water source is obtained from the vehicle water tank or the cleaning water circuit branch, and the micron-level water mist particles are formed after mixing with high-pressure gas through the atomizing nozzle. This gas-water collaborative cooling method is especially suitable for extreme high-temperature environments in summer, and the amount of water mist is accurately controllable to avoid excessive moisture affecting the concrete proportioning.

[0039] In actual application, according to the specific use of the transport tank truck, the size of the tank body and different environmental temperature conditions, a single type of nozzle or a combination of multiple nozzles can be selected for use to achieve the best cooling effect. For example, at the edge of the feeding hopper of the concrete mixer truck, a spiral nozzle array can be preferentially used to realize large-scale air flow disturbance in the tank body by utilizing the vortex air flow characteristics thereof; and in the middle region of the tank body, a plurality of straight pipe nozzles can be additionally arranged to enhance the local air flow intensity and ensure uniform temperature reduction in each region of the tank body. For the mixer truck that often operates in high-temperature and arid regions, an atomizing function module can also be integrated in the spray device, and the controller can automatically switch between pure gas flow spraying or gas-water mixed mist flow spraying modes according to the environmental temperature.

[0040] Figure 2 is a structural schematic diagram of a spiral nozzle provided by an embodiment of the present application. Referring to Figure 2To improve the exchange efficiency of the airflow inside and outside the tank, the injection device can be an array structure composed of multiple spiral nozzles 210, and each spiral nozzle 210 is provided with a spiral guide vane 211 inside. The guide angle of the spiral guide vane 211 can be set according to actual needs. For example, the guide angle of the spiral guide vane 211 can be 30°. When the gas flows through the spiral guide vane 211, a high-speed rotating vortex airflow is formed along the spiral track of the spiral guide vane 211. After the vortex airflow is ejected from the spiral nozzle 210, it can form stronger airflow disturbance in the tank, which not only accelerates the heat exchange rate of the air inside and outside the tank, but also makes the airflow contact the material surface more evenly inside the tank, avoiding the problem of insufficient local cooling. The material of the spiral nozzle can be selected from high-temperature-resistant and corrosion-resistant alloy materials to adapt to the complex working environment of the transport tank truck and prolong its service life. The installation position of the nozzle can be optimized according to the shape and size of the tank, such as annular arrangement around the tank inlet or inclined installation at a certain angle on the pre-installed mounting bracket inside the tank to ensure that the ejected airflow can cover the main area inside the tank.

[0041] The installation position of the injection device can be the top, side or bottom of the tank of the transport tank truck, which needs to be determined in combination with the structural characteristics of the tank and the material loading condition. For example, for a horizontal cylindrical tank of a powder and particle material transport truck, multiple groups of injection devices can be arranged at intervals along the axial direction on the top of the tank, and each group of devices includes multiple nozzles at different angles, so that the ejected airflow can cover most of the cross-sectional area of the tank. For a vertical tank transport vehicle, the injection device can be annularly arranged on the middle and upper parts of the side of the tank to promote the synergistic effect of natural convection and forced convection in the tank by using the density difference of the gas. In addition, the installation of the injection device also needs to consider the compatibility with other parts of the tank to avoid interference with the inlet, outlet, stirring blade and other structures, while ensuring that the injection direction of the nozzle does not directly impact the material surface to cause material splashing or local wear.

[0042] In a concrete mixer truck, an installation hole can be formed on the rear end cover of the mixing drum, i.e. the tank, to extend the nozzle of the injection device to a position near the blade inside the mixing tank, so that the airflow is in full contact with the concrete material under the driving of the stirring blade, further improving the cooling efficiency.

[0043] Figure 3 FIG. 1 is a schematic diagram of an installation position of an injection device provided by an embodiment of the present application. Taking a transport tank truck as a concrete mixer truck as an example, referring to FIG. 1, the injection device is arranged on the top of the tank, and the nozzles of the injection device are arranged in a spiral manner around the tank to form a spiral airflow that covers most of the cross-sectional area of the tank. Figure 3To avoid damage to the structural integrity of the mixing drum, the spraying device 120 can be installed on the edge of the feeding hopper 310 of the concrete mixer truck. The feeding hopper 310 is in communication with the feeding port of the mixing drum 320, and the nozzle of the spraying device 120 can be inclined downwardly arranged so that the sprayed gas flow slides along the inner wall of the feeding hopper 310 to the inside of the mixing drum 320. This installation method does not need to make an opening on the body of the mixing drum 320, which reduces the difficulty and cost of modification. At the same time, the gas flow can be uniformly dispersed to different areas inside the mixing drum 320 by using the guiding effect of the feeding hopper 310. In addition, the installation position on the edge of the feeding hopper 310 is convenient for later maintenance and replacement of the spraying device 120, and is not easily impacted by the material when the mixing drum 320 rotates.

[0044] To ensure the braking safety of the transport tank truck, a gas pressure detection device is arranged in the braking gas circuit, and the controller is in communication connection with the gas pressure detection device in the braking gas circuit to obtain the gas pressure of the braking gas circuit. The controller controls the conduction or disconnection of the cooling gas circuit according to the gas pressure of the braking gas circuit. Exemplarily, if the gas pressure of the braking gas circuit is higher than the set threshold value, it indicates that there is sufficient margin for the cooling system to use from the braking gas source, at this time the controller controls the cooling gas circuit to be conducted, so that the gas in the braking gas storage device flows to the spraying device through the cooling gas circuit; if the gas pressure of the braking gas circuit is lower than or equal to the set threshold value, the controller controls the cooling gas circuit to be disconnected, to preferentially guarantee the gas pressure demand of the braking gas circuit, and avoid insufficient braking pressure due to gas use of the cooling system. The set threshold value can be pre-set according to the braking performance parameters and safety standards of the transport tank truck, for example, set as a certain percentage of the lower limit value of the normal working gas pressure range of the braking system, to reserve sufficient braking pressure buffer space. In actual application, the controller can also dynamically adjust the set threshold value in combination with the driving state of the vehicle, automatically increase the set threshold value when the vehicle is on a downhill section or in a frequent braking working condition, to further ensure the braking safety.

[0045] To realize fine control of the cooling process, the cooling system provided by the embodiments of the present application can further include an in-tank temperature detection device in communication connection with the controller, for detecting the temperature inside the tank. When the gas pressure of the braking gas circuit meets the conduction condition, the controller controls the operating parameters of the cooling gas circuit according to the tank temperature information fed back by the in-tank temperature detection device. For example, if the temperature inside the tank is higher than a first preset temperature, the cooling gas circuit is controlled to be conducted at the maximum flow rate; if the temperature inside the tank is between the first preset temperature and a second preset temperature, the cooling gas circuit is controlled to be intermittently conducted, the gas injection amount is adjusted by adjusting the on-off frequency of the electromagnetic valve, to avoid energy waste; if the temperature inside the tank is lower than or equal to the second preset temperature, the cooling gas circuit is controlled to be kept in the disconnected state, to stop the cooling operation. The first preset temperature and the second preset temperature can be personalized set according to the characteristics of the transported materials, and the second preset temperature is less than the first preset temperature.

[0046] Generally, installing the in-tank temperature detection device in the tank body requires structural modification such as opening a hole in the tank body, which may affect the sealing property and structural strength of the tank body, especially for the tank body carrying high-pressure or corrosive materials, the safety risk is higher. Figure 4 is another structural schematic diagram of a cooling system provided by an embodiment of the present application. Referring to Figure 4 To solve this problem, on the basis of the cooling system shown in Figure 1 the cooling system provided by an embodiment of the present application can further include an ambient temperature detection device 410, which is in communication connection with the controller 130 and is used for detecting the ambient temperature; the controller 130 is also in communication connection with a running time determination device 420 of the transport tank car, the controller 130 obtains the continuous running time of the transport tank car through the running time determination device 420, and the controller 130 estimates the in-tank temperature according to the ambient temperature and the continuous running time of the transport tank car, and then controls the conduction or disconnection of the cooling gas circuit 120.

[0047] The running time determination device of the transport tank car refers to a device or module for obtaining the continuous running time of the transport tank car. Exemplarily, the running time determination device can be a terminal device in communication with the vehicle CAN bus, which directly reads the continuous running time of the engine or motor from the vehicle control system. The running time determination device can be an existing terminal device of the vehicle, which is not limited in the present application.

[0048] To reduce unnecessary gas consumption, the controller in the cooling system provided by an embodiment of the present application can compare the internal temperature of the tank body with the ambient temperature, if the ambient temperature is less than the internal temperature of the tank body, the cooling gas circuit is controlled to be conducted, otherwise the cooling gas circuit is controlled to be disconnected.

[0049] Figure 5 is another structural schematic diagram of a cooling system provided by an embodiment of the present application. On the basis of the cooling system shown in Figure 1 to improve the cooling efficiency, referring to Figure 5 the cooling system provided by an embodiment of the present application further includes a gas pressure compensation device 510. The gas pressure compensation device 510 is arranged on the cooling gas circuit 110 and is used for compensating the gas pressure in the cooling gas circuit 110; the gas pressure compensation device 510 is in communication connection with the controller 130, and the start or stop of the gas pressure compensation device 510 is controlled by the controller 130. Through the gas pressure compensation device 510, the present application can further improve the gas pressure in the cooling gas circuit 110, and then increase the flow rate and flow of the gas sprayed by the spraying device 120, enhance the disturbance effect of the gas flow on the air in the tank body, and accelerate the heat exchange.

[0050] Exemplarily, the air pressure compensation device can adopt a miniature air compressor or a booster pump, the air inlet end of which is communicated with the cooling air path, and the air outlet end of which is connected to the air path pipeline upstream of the injection device. In some implementations, the control logic of the controller for the air pressure compensation device can be that when the controller detects that the gas pressure delivered by the cooling air path is lower than the set value, the air pressure compensation device is automatically started to lift the gas pressure to the target range through compression or boosting; when the pressure returns to normal, the controller controls the air pressure compensation device to stop working to reduce energy consumption. The working parameters of the air pressure compensation device can be dynamically adjusted according to the design flow of the injection device, the tank volume and the target cooling rate, for example, when the ambient temperature is high or the temperature in the tank rises rapidly, the compensation pressure is increased to enhance the cooling effect; when the temperature tends to be stable, the compensation pressure is reduced or the compensation is suspended to realize energy-saving operation. Alternatively, the controller can also control the start of the air pressure compensation device according to the temperature inside the tank of the transport tanker.

[0051] Exemplarily, the application embodiment provides an application scenario of the cooling system, which can be integrated into the overall structure of the transport tanker, for example, the air inlet end of the cooling air path can be connected with the air outlet of the brake air storage device to ensure stable air source acquisition; and the injection device adopts a differential installation mode according to different types of transport tankers. Exemplarily, for a concrete mixer truck, a plurality of spiral nozzles of the injection device can be fixed to the inner side edge of the feeding hopper, and the injection direction of the nozzles is directed to the mixing area inside the tank, which can not only avoid interference with the mixing blades, but also ensure that the vortex airflow uniformly covers the surface of the concrete. In some implementations, the cooling system can further include an air pressure compensation device, which can be connected in series at a middle position of the cooling air path, the input end of which is connected with the brake air storage device, and the output end of which is communicated with the injection device, which can be instructed by the controller to pressurize the airflow again to make up for the pressure loss in long-distance air path transmission. The controller as the core control unit of the system can be installed in the cab of the transport tanker or in the electrical control box, and is connected with the air pressure detection device of the brake air path, the ambient temperature detection device, the running time determination device, and the air pressure compensation device, electromagnetic valve and other execution components through communication to form a complete signal acquisition and control closed loop. This integrated design enables the cooling system to be organically integrated with the original structure of the transport tanker, without the need for large-scale modification of the vehicle chassis or tank, which not only reduces the modification cost, but also ensures the reliability of the system operation.

[0052] The cooling system provided by the embodiments of the present application combines the gas resource of the brake gas storage device with the newly added cooling gas circuit, the injection device and the controller, and constructs a set of efficient, safe and highly adaptable transport tank truck cooling solution. The system does not need to additionally configure an independent gas source, directly uses the existing brake gas storage device of the vehicle to provide high-pressure gas, significantly reduces the modification cost and system complexity. Through the modular design of the cooling gas circuit, different numbers and types of injection devices can be flexibly adapted to meet the diversified tank structure and cooling demand. The various structural forms and installation schemes of the injection device ensure that the gas can act accurately and uniformly on the inside of the tank, and the stability and safety of the system operation are effectively ensured in combination with the safety components such as the electromagnetic valve, the check valve and the pressure regulating valve in the gas circuit. The controller makes intelligent decisions based on the brake gas circuit pressure, tank temperature and other multi-dimensional parameters, realizes dynamic adjustment and fine control of the cooling process, can quickly reduce the tank temperature in a high-temperature environment, and can also avoid invalid gas consumption, taking into account the cooling efficiency and energy economy. In addition, the system fully considers the compatibility with the original vehicle structure during installation, optimizes the installation position of the injection device and other designs to minimize the impact on the integrity of the tank and the original functions of the vehicle, and provides a practical active cooling technical solution for various transport tank trucks, especially for concrete mixers and other special vehicles sensitive to material temperature, which helps to improve the quality stability of the transported materials and expand the operating capacity of the transport tank trucks in high-temperature environments.

[0053] The following will be described in combination with Figure 6 The control method applied in the controller of the cooling system described in any of the embodiments of the present application is exemplified.

[0054] Figure 6 is a flow diagram of a control method provided by the embodiments of the present application. The control method provided by the embodiments of the present application is applied in the controller of the cooling system described in any of the embodiments of the present application. Referring to Figure 6 , the control method provided by the embodiments of the present application includes the following steps.

[0055] S610, obtaining the gas pressure of the brake gas circuit.

[0056] In some implementations, the control can be in communication connection with the brake gas circuit pressure detection device, and the gas pressure of the brake gas circuit is obtained through the brake gas circuit pressure detection device. Exemplarily, other terminal devices of the vehicle can be connected, and the other terminal devices obtain the gas pressure of the brake gas circuit through the brake gas circuit pressure detection device, thereby realizing indirect acquisition of the gas pressure of the brake gas circuit. It can also be obtained through the three-way electromagnetic valve connected with the brake gas circuit.

[0057] S620, determining whether the gas pressure of the brake gas circuit meets the normal braking condition.

[0058] In some embodiments, the normal braking condition can include that the air pressure of the brake air path is greater than a set threshold value. If the air pressure of the brake air path is greater than the set threshold value, it is determined that the normal braking condition is met, otherwise it is determined that the normal braking condition is not met.

[0059] The determination of the set threshold value can also comprehensively consider the design parameters, load conditions and driving road conditions of the vehicle braking system. For example, for heavy load vehicles or downhill sections in mountainous areas, the set threshold value can be appropriately increased to reserve a larger brake pressure safety margin. In addition, the controller can also combine the real-time braking state of the vehicle in the judgment process. If it is detected that the vehicle is in the braking process of stepping on the brake pedal, whether the current air pressure meets the threshold value or not, the conduction of the cooling air path is temporarily interrupted. After the braking process is over and the air pressure returns to the safe range, the cooling function is restarted, further ensuring the absolute priority of driving braking.

[0060] S630, if the air pressure of the brake air path meets the normal braking condition, the cooling air path of the cooling system is controlled to be conducted.

[0061] In order to avoid the influence on the brake air path, if the air pressure of the brake air path does not meet the normal braking condition, the cooling air path of the cooling system is controlled to be disconnected.

[0062] The control method provided by the embodiments of the present application can realize intelligent on-off control of the cooling air path by monitoring the air pressure state of the brake air path in real time, and preferentially guarantee the normal work of the vehicle braking system.

[0063] In order to guarantee the accuracy of triggering the conduction of the cooling air path, in combination with the control method shown in Figure 6 In some embodiments, the cooling system can also include an ambient temperature detection device, the ambient temperature detection device is in communication connection with the controller, and the controller is also in communication connection with a running time determination device of the transport tank truck. If the air pressure of the brake air path meets the normal braking condition, the cooling air path of the cooling system can be controlled to be conducted, which can include: respectively acquiring the ambient temperature through the ambient temperature detection device and acquiring the continuous running time of the transport tank truck through the running time determination device; judging whether the ambient temperature and the continuous running time of the transport tank truck meet the cooling condition; if the air pressure of the brake air path meets the normal braking condition and the ambient temperature and the continuous running time of the transport tank truck meet the cooling condition, the cooling air path is controlled to be conducted; if the air pressure of the brake air path meets the normal braking condition, but the ambient temperature and the continuous running time of the transport tank truck do not meet the cooling condition, the cooling air path is controlled to be disconnected.

[0064] The cooling condition can include that the ambient temperature is greater than a set temperature threshold value, and the continuous running time of the transport tank truck is greater than a set running time threshold value. If the ambient temperature is greater than the set temperature threshold value, and the continuous running time of the transport tank truck is greater than the set running time threshold value, it is determined that the cooling condition is met, otherwise the cooling condition is not met.

[0065] Optionally, the judgment of the normal braking condition and the cooling condition is not in order, and whether the normal braking condition is satisfied can be judged first, and whether the cooling condition is satisfied can be judged second, or whether the cooling condition is satisfied can be judged first, and whether the normal braking condition is satisfied can be judged second. In a possible implementation, the normal braking condition can also be judged first, and the cooling condition can be judged second, to ensure that safety is given priority.

[0066] The embodiment of the application realizes double-signal triggering by using the ambient temperature and the running length of the transport tank truck as triggering conditions, and further improves the accuracy and reliability of the cooling control.

[0067] To improve the cooling efficiency and avoid resource waste, in combination with the control method shown in Figure 6 In some implementations, the cooling system can further include an ambient temperature detection device, which is in communication connection with the controller. If the air pressure of the braking air path meets the normal braking condition, the cooling air path of the cooling system is turned on, including: obtaining the ambient temperature by the ambient temperature detection device; if the air pressure of the braking air path meets the normal braking condition, and the ambient temperature meets the first temperature range, the injection device of the cooling system is controlled to intermittently inject; if the air pressure of the braking air path meets the normal braking condition, and the ambient temperature meets the second temperature range, the injection device is controlled to continuously inject, and the minimum value in the second temperature range is greater than the maximum value in the first temperature range.

[0068] Exemplarily, the first temperature range can be 30-40℃, and the second temperature range can be greater than 40℃.

[0069] The embodiment of the application realizes dynamic adaptation of the cooling intensity by controlling the working mode of the injection device according to the ambient temperature. When the ambient temperature is in the first temperature range, the material temperature rising rate is relatively gentle, and at this time, the intermittent injection mode is adopted, and the cooling air path is periodically turned on and off, so that the tank temperature can be maintained in a reasonable range, and energy waste caused by continuous air supply can be avoided. When the ambient temperature enters the second temperature range, the heat conduction of the external heat source to the tank body is intensified, and the material temperature is easily rapidly increased. The controller switches to the continuous injection mode to ensure that sufficient gas continuously enters the tank body, and the convection heat exchange effect is strengthened to rapidly inhibit the temperature rising trend. The grading control strategy based on the ambient temperature gradient enables the cooling system to maintain the balance between high efficiency and energy saving under different heat load conditions.

[0070] To improve the cooling efficiency, in combination with the control method shown in Figure 6The control method shown, in some implementations, the cooling system can further include a gas pressure compensation device, the gas pressure compensation device is arranged on the cooling gas circuit, and is used for performing gas pressure compensation on the gas delivered by the cooling gas circuit; the gas pressure compensation device is in communication connection with the controller, and the control method can further include: if the gas pressure of the brake gas circuit meets the normal braking condition, and the environmental temperature meets the second temperature range, then the gas pressure compensation device is controlled to start, and the pressure of the gas in the cooling gas circuit is increased to the set pressure based on the set increment.

[0071] The embodiment of the present application can improve the cooling capacity in a high-temperature environment by starting the gas pressure compensation device when the environmental temperature is in the second temperature range.

[0072] The following will be described in combination with Figure 7 Taking a transport tank truck as a concrete mixer as an example, the cooling system and the control method applied to the concrete mixer are introduced as follows by using the cooling system and the control method provided by the embodiment of the present application.

[0073] Figure 7 is another structural schematic diagram of a cooling system provided by the embodiment of the present application. Referring to Figure 7 In some implementations, the cooling system provided by the embodiment of the present application includes a cooling gas circuit 110, the cooling gas circuit 110 is connected with a brake gas storage device 140 through a three-way electromagnetic valve 710, the brake gas storage device 140 delivers the stored gas to the brake gas circuit 150 and the cooling gas circuit 110 through the three-way electromagnetic valve 710 respectively. The cooling gas circuit 110 is further provided with a gas pressure compensation device 510, which is used for performing gas pressure compensation on the gas delivered by the cooling gas circuit. One end of the cooling gas circuit 110 away from the brake gas storage device 140 is connected with a jet device 120, the jet device 120 includes a plurality of spiral nozzles arranged in an array, and a spiral guide vane is arranged in each spiral nozzle to form a vortex gas flow. The spiral nozzles are arranged at the edge of a feeding hopper of the concrete mixer, so as to jet the gas delivered by the cooling gas circuit into the tank body of the concrete mixer. The cooling system further includes a controller 130 and an environmental temperature detection device 410, the controller 130 is in communication connection with the three-way electromagnetic valve 710, the environmental temperature detection device 410 and a running time determination device 420, and is used for controlling the conduction or disconnection of the cooling gas circuit according to the environmental temperature, the continuous running time of the transport tank truck and the gas pressure in the brake gas circuit. The controller 130 is further connected with the gas pressure compensation device 510, and is used for controlling the start or shutdown of the gas pressure compensation device 510.

[0074] The control method in the controller can include: if the air pressure in the brake air path meets the normal braking condition, and the ambient temperature and the continuous running time of the transport tank vehicle meet the cooling condition, then controlling the cooling air path to be turned on. Further, if the ambient temperature meets the first temperature range, then controlling the injection device of the cooling system to be intermittently injected; if the ambient temperature meets the second temperature range, then controlling the air pressure compensation device to be started, and controlling the injection device to be continuously injected. If the air pressure in the brake air path does not meet the normal braking condition, then controlling the cooling air path to be turned off.

[0075] Figure 8 is a structural schematic diagram of a mixing truck provided by an embodiment of the present application. In Figures 1 to 5 , Figure 7 based on the cooling system shown in the above, the present application further provides a concrete mixing truck, which is a pneumatic braking transport tank vehicle, and the mixing truck comprises any of the cooling systems according to the embodiments of the present application. Referring to Figure 8 In the actual transportation process, the controller 130 automatically judges whether the normal braking condition is met according to the air pressure in the brake air path 150. If the normal braking condition is met, then the cooling air path 110 is turned on by the three-way electromagnetic valve 710, and the gas in the brake gas storage device 140 is injected into the tank body of the mixing truck by the injection device 120 to promote the circulation of the air in the tank body and the air in the environment.

[0076] The mixing truck provided by the embodiments of the present application realizes the dynamic cooling control of the concrete in the tank by organically integrating the cooling system with the vehicle brake gas storage device and the tank body structure.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cooling system, characterized by, The application relates to a transport tank vehicle applied to air pressure braking, wherein the transport tank vehicle is provided with a brake gas storage device and a brake gas circuit connected with the brake gas storage device, the brake gas circuit is used for conveying gas in the brake gas storage device to a brake chamber to perform braking, and the cooling system comprises: a cooling gas circuit connected with the brake gas storage device; a spraying device connected with the cooling gas circuit, the cooling gas circuit is used for conveying gas in the brake gas storage device to the spraying device, the spraying device sprays the gas conveyed by the cooling gas circuit into a tank body of the transport tank vehicle to promote the flow of air in the tank body and air in the environment; a controller in communication connection with the cooling gas circuit and the brake gas circuit, used for controlling the on or off of the cooling gas circuit according to the air pressure of the brake gas circuit.

2. The cooling system of claim 1, wherein, Further comprising: an environment temperature detection device in communication connection with the controller, used for detecting an environment temperature; the controller is further in communication connection with a running time length determination device of the transport tank vehicle, the controller acquires the continuous running time length of the transport tank vehicle through the running time length determination device, and the controller controls the on or off of the cooling gas circuit according to the environment temperature and the continuous running time length of the transport tank vehicle.

3. The cooling system according to claim 1 or 2, characterized in that Further comprising: an air pressure compensation device arranged on the cooling gas circuit, used for air pressure compensation of the gas conveyed by the cooling gas circuit; the air pressure compensation device is in communication connection with the controller, and the controller controls the start or stop of the air pressure compensation device.

4. The cooling system according to claim 1 or 2, characterized in that, The spraying device comprises a plurality of spiral nozzles arranged in an array, and a spiral guide vane is arranged in the spiral nozzle to form a vortex airflow.

5. The cooling system of claim 1 or 2, wherein The transport tank vehicle comprises a concrete mixer truck, the concrete mixer truck comprises a feeding hopper connected with a tank body of the concrete mixer truck, and the spraying device is arranged at the edge of the feeding hopper so as to spray the gas conveyed by the cooling gas circuit into the tank body of the concrete mixer truck.

6. A control method characterized by, The controller applied to the cooling system in any one of claims 1 to 5, the control method comprises: acquiring the air pressure of the brake gas circuit; judging whether the air pressure of the brake gas circuit meets a normal braking condition; if the air pressure of the brake gas circuit meets the normal braking condition, controlling the on of the cooling gas circuit of the cooling system.

7. The control method according to claim 6, characterized by The cooling system further comprises an environment temperature detection device in communication connection with the controller, and the controller is further in communication connection with a running time length determination device of the transport tank vehicle, if the air pressure of the brake gas circuit meets the normal braking condition, controlling the on of the cooling gas circuit of the cooling system, comprising: respectively acquiring an environment temperature through the environment temperature detection device and acquiring the continuous running time length of the transport tank vehicle through the running time length determination device; judging whether the environment temperature and the continuous running time length of the transport tank vehicle meet a cooling condition; if the air pressure of the brake gas circuit meets the normal braking condition, and the environment temperature and the continuous running time length of the transport tank vehicle meet the cooling condition, controlling the on of the cooling gas circuit.

8. The control method according to claim 6 or 7, characterized by, The cooling system further comprises an ambient temperature detection device, which is in communication connection with the controller, and if the air pressure of the brake air path meets the normal braking condition, the cooling air path of the cooling system is controlled to be conducted, comprising: obtaining the ambient temperature through the ambient temperature detection device; if the air pressure of the brake air path meets the normal braking condition, and the ambient temperature meets a first temperature range, the injection device of the cooling system is controlled to be intermittently injected; if the air pressure of the brake air path meets the normal braking condition, and the ambient temperature meets a second temperature range, the injection device is controlled to be continuously injected, and the minimum value in the second temperature range is greater than the maximum value in the first temperature range.

9. The control method according to claim 8, characterized by, The cooling system further comprises an air pressure compensation device, which is arranged on the cooling air path and used for air pressure compensation of the gas delivered by the cooling air path; the air pressure compensation device is in communication connection with the controller, and the control method further comprises: if the air pressure of the brake air path meets the normal braking condition, and the ambient temperature meets the second temperature range, the air pressure compensation device is controlled to be started, and the pressure of the gas in the cooling air path is increased to a set pressure based on a set increment.

10. A mixer truck characterized by, The mixer truck is a pneumatic braking transport tank truck, and the mixer truck comprises the cooling system according to any one of claims 1 to 5.

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