Cooling system and mixer truck

Abstract

The application relates to the field of cooling technology of transport tank trucks, and provides a cooling system and a mixer truck.The cooling system comprises a cooling gas circuit connected with a brake gas storage device, which is used for receiving the gas output by the brake gas storage device and conveying the gas; and a spraying device connected with the cooling gas circuit, which is used for receiving the gas conveyed by the cooling gas circuit and spraying the gas conveyed by the cooling gas circuit into a tank body of the transport tank truck, so that efficient and energy-saving cooling of the tank body is realized.

Description

Technical Field

[0001] This application relates to the field of cooling technology for transport tank trucks, specifically to cooling systems and mixer trucks. Background Technology

[0002] Under high temperature conditions, the concrete inside the concrete mixer truck tank is prone to deterioration phenomena such as accelerated slump loss and abnormal setting time, resulting in poor structural compactness and uneven strength after pouring, which seriously affects the durability of the project.

[0003] Currently, the main methods for suppressing high-temperature degradation are external wall spraying of tanks for cooling or the addition of circulating cooling pipes to the air conditioning system. However, external wall spraying has low heat transfer efficiency and limited cooling effect; while air conditioning systems significantly increase additional fuel or electricity consumption, making it difficult to adapt to the current trend of green, low-carbon, and energy-efficient building development. Utility Model Content

[0004] This application provides a cooling system and a mixer truck that can achieve efficient and energy-saving cooling of the tank.

[0005] In a first aspect, embodiments of this application provide a cooling system applied to a pneumatically braked tank truck. The tank truck has a brake air storage device. The cooling system includes: a cooling air path connected to the brake air storage device; and an injection device connected to the cooling air path. The cooling air path is used to deliver gas from the brake air storage device to the injection device, which then injects the gas delivered by the cooling air path into the tank of the tank truck.

[0006] In conjunction with the first aspect, in some implementations of the first aspect, the cooling system further includes: a pressure compensation device, which is installed on the cooling gas path and is used to compensate the pressure of the gas transported in the cooling gas path.

[0007] In conjunction with the first aspect, in some implementations of the first aspect, the spraying device includes a plurality of nozzles arranged in an array.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the nozzle includes a spiral nozzle, in which spiral guide vanes are disposed to form a vortex airflow.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the guiding angle of the spiral guide vane is in the range of 25° to 35°.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the transport tanker includes a concrete mixer truck, the concrete mixer truck includes a feed hopper connected to the tank body of the concrete mixer truck, and a spraying device is disposed at the edge of the feed hopper for spraying cooling gas transported by a gas path into the tank body of the concrete mixer truck.

[0011] In conjunction with the first aspect, some implementations of the first aspect also include: a three-way valve connected to the brake gas storage device, the cooling gas circuit, and the brake gas circuit of the transport tanker, for delivering the gas stored in the brake gas storage device to the cooling gas circuit and the brake gas circuit.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the cooling system further includes: a controller, which is communicatively connected to a three-way valve, for controlling the opening or closing of the cooling air path through the three-way valve.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the ambient temperature detection device is communicatively connected to the controller for detecting the ambient temperature.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the transport tanker includes a water tank connected to a spraying device via a pipeline for supplying a small amount of atomized water to the spraying device; the spraying device includes an atomizing nozzle for mixing the gas supplied by the cooling gas path with the small amount of atomized water supplied by the water tank to form a gas-water mixed mist, and spraying the gas-water mixed mist into the tank body of the transport tanker.

[0015] Secondly, embodiments of this application also provide a mixer truck, which is a pneumatically braked transport tanker truck, and the mixer truck includes a cooling system as described in the first aspect.

[0016] The cooling system provided in this application reuses the vehicle's existing pneumatic brake air source to directly cool the interior of the tanker truck, thereby achieving efficient and energy-saving cooling of the tank. Specifically, the cooling system provided in this application does not require an additional independent power source or cooling device, effectively reducing the overall energy consumption and equipment cost of the system. When the injection device injects the cooling gas transported by the cooling air path into the tank, it can form directional airflow disturbance, accelerating the convection exchange between the high-temperature air inside the tank and the ambient air. Compared with traditional external wall cooling methods, the heat exchange is more direct and more efficient. Attached Figure Description

[0017] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0018] Figure 1 This is a schematic diagram of a cooling system provided in an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the structure of a spiral nozzle provided in an embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the installation position of a spraying device provided in an embodiment of this application.

[0021] Figure 4 This is a schematic diagram of another cooling system provided in an embodiment of this application.

[0022] Figure 5 This is a schematic diagram of another cooling system provided in an embodiment of this application.

[0023] Figure 6 This is a schematic diagram of another cooling system provided in an embodiment of this application.

[0024] Figure 7 This is a schematic diagram of another cooling system provided in an embodiment of this application.

[0025] Figure 8 This is a schematic diagram of another cooling system provided in an embodiment of this application.

[0026] Figure 9 This is a structural schematic diagram of a mixer truck provided in an embodiment of this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] Before introducing the cooling system provided in the embodiments of this application, the relevant concepts involved in the embodiments of this application and the application overview are introduced as follows.

[0029] Pneumatic braking is a system that uses compressed air to achieve braking. Gas pressure is transmitted to the brake chambers via a brake air circuit, ultimately generating braking force to decelerate or stop the vehicle. In this system, the brake air reservoir serves as the core air source, responsible for storing compressed air and maintaining the required system pressure. The brake air reservoir stores gas, which can be compressed air or other inert gases, selected based on the actual braking requirements of the tanker truck and cost control. The brake air circuit delivers the gas from the brake air reservoir to the brake chambers. During the tanker truck's operation, the brake air reservoir is connected to the brake air circuit, providing a stable and reliable air supply.

[0030] Tank trucks are specialized vehicles used to transport various liquid, gaseous, or solid materials, such as concrete mixer trucks, powder and granular material transport trucks, and liquid food transport trucks. Among them, concrete mixer trucks are a typical example. The concrete loaded in their tanks is prone to performance degradation due to temperature rise in high-temperature environments, thus the need for cooling is particularly prominent.

[0031] The cooling system provided in this application embodiment is specifically designed for the characteristics of this type of pneumatically braked tanker truck. By constructing an independent cooling air path, it achieves the reuse of the air source for the brake air storage device. Specifically, the cooling system provided in this application embodiment does not require an additional independent power source or cooling device, effectively reducing the overall energy consumption and equipment cost of the system. When the injection device injects the gas transported by the cooling air path into the tank, it can create directional airflow disturbance, accelerating the convective exchange between the high-temperature air inside the tank and the ambient air. Compared with traditional external wall cooling methods, the heat exchange is more direct and more efficient.

[0032] The following is combined with Figures 1 to 8 An example is provided to illustrate the cooling system provided in the embodiments of this application.

[0033] Figure 1 This is a schematic diagram of a cooling system provided in an embodiment of this application. The cooling system provided in this embodiment is applied to a tanker truck with pneumatic braking. The tanker truck has a brake air storage device, which is connected to the brakes of the tanker truck and used to deliver the gas stored in the brake air storage device to the brake air circuit as a brake air source for the brake air circuit. See also... Figure 1 The cooling system provided in this embodiment includes a cooling air path 110 and an injection device 120. The cooling air path 110 is connected to a brake air storage device 140. The injection device 120 is connected to the cooling air path 110. The cooling air path is used to transport gas from the brake air storage device to the injection device, which then injects the gas transported by the cooling air path into the tank of the transport tanker to promote the circulation of air inside the tank with air in the environment, thereby cooling the tank.

[0034] The brake air storage device is part of the existing braking system of transport tank trucks, and this application embodiment does not limit it. For example, the brake air storage device can be a brake air reservoir. The following focuses on describing the newly added cooling air path and injection device.

[0035] The cooling air path refers to the gas flow path used to connect the brake air storage device and the injection device. The cooling air path is used to transport the gas in the brake air storage device to the injection device. The embodiments of this application do not limit the configuration of the cooling air path. For example, when there is one injection device, the cooling air path can be composed of a single pipeline. When there are multiple injection devices, the cooling air path can be composed of a main pipeline and several branch pipelines. One end of the main pipeline is connected to the air outlet of the brake air storage device, and the other end is connected to the junction of the branch pipelines. The ends of the branch pipelines are respectively sealed to the air inlets of each injection device.

[0036] The cooling air circuit and the brake air storage device can be connected by opening a separate air outlet on the air storage cylinder of the brake air storage device. This outlet is directly connected to the cooling air circuit through a pipeline. This method can reduce the modification of the original structure of the brake air circuit and reduce the difficulty and cost of modification.

[0037] To ensure the stability and safety of gas delivery, a one-way valve and a pressure regulating valve can be installed sequentially on the cooling gas line. The one-way valve is used to prevent gas from flowing back to the brake gas storage device, thus avoiding affecting the gas pressure stability of the brake gas line. The pressure regulating valve can set the gas delivery pressure according to actual needs to prevent damage to the injection device or the internal structure of the tank due to excessive pressure.

[0038] As the actuator that directly injects cooling gas into the tank, the design of the injection device directly affects the cooling effect. Optionally, the injection device may include one or more nozzles. To improve cooling efficiency, multiple nozzles can be arranged in an array according to the shape and size of the tank, so that the injected gas can evenly cover the internal space of the tank. For example, multiple nozzles can be arranged in a ring around the periphery of the tank's inlet, with each nozzle's spray direction facing the gap between the inner wall of the tank and the material surface, forming a three-dimensional intersecting airflow network to accelerate heat dissipation. For long cylindrical tanks, nozzle groups can also be added in the middle and rear of the tank. By adjusting the spray angle and gas flow rate of each nozzle group, precise cooling of different areas inside the tank can be achieved.

[0039] Optionally, the type of nozzle can be selected according to the gas injection requirements, such as a fan nozzle, a cone nozzle, or a straight nozzle. Figure 2 This is a schematic diagram of the structure of a spiral nozzle provided in an embodiment of this application. See also... Figure 2To improve the exchange efficiency of airflow inside and outside the tank, the nozzle type can be a spiral nozzle 210. A spiral guide vane 211 is installed inside the spiral nozzle. The spiral nozzle 210 guides the gas to rotate through the internal spiral guide vane 211, forming a highly turbulent vortex airflow, which can effectively enhance the mixing effect with the high-temperature air inside the tank. The guiding angle of the spiral guide vane can be optimized within the range of 25° to 35°. When the guiding angle is 30°, the axial velocity and radial diffusion range of the vortex airflow achieve a good balance, ensuring both the gas injection depth and expanding the cooling coverage area.

[0040] Optionally, the nozzle can also be an atomizing nozzle. The atomizing nozzle mixes the gas supplied by the cooling air path with a small amount of atomized water supplied by the water tank of the transport tanker to form a gas-water mixed mist, which is then sprayed into the tank of the transport tanker. The water tank of the transport tanker is connected to the spraying device via a pipeline to supply a small amount of atomized water to the spraying device. The cooling effect is further enhanced by utilizing the heat absorption of water mist evaporation. This gas-water synergistic cooling method is particularly suitable for extreme high-temperature environments in summer, and the amount of water mist is precisely controllable, avoiding excessive moisture from affecting the concrete mix design.

[0041] For example, the injection device can also be a multi-hole injection assembly composed of multiple straight nozzles. The straight nozzles have no internal flow guiding structure, and the gas is directly ejected through the straight pipe to form a columnar airflow, which is suitable for directional cooling of local areas.

[0042] In practical applications, depending on the specific purpose of the transport tanker, its tank size, and different ambient temperature conditions, a single type of nozzle or a combination of multiple nozzles can be selected to achieve the best cooling effect. For example, at the edge of the feed hopper of a concrete mixer truck, a spiral nozzle array can be preferentially used to achieve large-scale airflow disturbance within the tank by utilizing its vortex airflow characteristics; while in the central area of ​​the tank, several straight nozzles can be additionally installed to enhance the local airflow intensity and ensure that the temperature in all areas of the tank is reduced uniformly. For mixer trucks that frequently operate in hot and arid regions, an atomization module can be integrated into the spraying device, and the controller can automatically switch between pure airflow spraying and air-water mixed mist spraying modes according to the ambient temperature.

[0043] The installation location of the spraying device can be different areas such as the top, side, or bottom of the tanker truck, depending on the tank's structural characteristics and the material loading conditions. For example, for a horizontal cylindrical tanker truck transporting powder and granular materials, multiple sets of spraying devices can be installed at intervals along the axial direction on the top of the tank. Each set contains multiple nozzles at different angles, allowing the sprayed airflow to cover most of the tank's cross-section. For vertical tanker trucks, spraying devices can be arranged in a ring around the upper middle part of the side of the tank, utilizing the gas density difference to promote the synergistic effect of natural and forced convection within the tank. Furthermore, the installation of the spraying device must consider compatibility with other tank components, avoiding interference with the inlet, outlet, agitator blades, and other structures. It must also ensure that the nozzle's spray direction does not directly impact the material surface, causing material splashing or localized wear.

[0044] In a concrete mixer truck, an installation hole can be made on the rear end cover of the mixing drum, or tank, to extend the nozzle of the spraying device to the inside of the mixing drum near the blades. This allows the airflow to fully contact the concrete material under the action of the mixing blades, further improving the cooling efficiency.

[0045] Figure 3 This is a schematic diagram illustrating the installation position of a spraying device according to an embodiment of this application. A concrete mixer truck is used as an example. See also... Figure 3 To avoid damaging the structural integrity of the mixing drum, a spraying device 120 can be installed on the edge of the feed hopper 310 of the concrete mixer truck. The feed hopper 310 is connected to the feed inlet of the mixing drum 320, and the nozzle of the spraying device 120 can be tilted downwards, allowing the sprayed airflow to slide down the inner wall of the feed hopper 310 into the interior of the mixing drum 320. This installation method eliminates the need for drilling holes in the mixing drum 320, reducing modification difficulty and cost. Simultaneously, the guiding effect of the feed hopper 310 allows the airflow to be evenly distributed to different areas within the mixing drum 320. Furthermore, the installation position at the edge of the feed hopper 310 facilitates future maintenance and replacement of the spraying device 120 and is less susceptible to material impact during the rotation of the mixing drum 320.

[0046] Figure 4 This is a schematic diagram of another cooling system provided in an embodiment of this application. See also... Figure 4 To simplify the connection between the cooling air path and the brake air storage device, Figure 1Based on the cooling system shown, the cooling system provided in this application embodiment may further include a three-way valve 410, connected to the brake air storage device 140, the cooling air passage 110, and the brake air passage 150, for delivering the gas stored in the brake air storage device 140 to the cooling air passage 110 and the brake air passage 150. This method can reduce the need for additional interfaces. This application embodiment does not limit the specific form of the three-way valve, as long as it enables the connection between the brake air storage device 140, the cooling air passage 110, and the brake air passage 150. For example, the three-way valve 410 may be a three-way solenoid valve, a manual three-way valve, or a proportional three-way valve, etc.

[0047] Figure 5 This is a schematic diagram of another cooling system provided in an embodiment of this application. See also... Figure 5 ,exist Figure 4 Based on the cooling system shown, the cooling system provided in this application embodiment may further include: a controller 510, connected to the three-way valve 410, used to control the opening or closing of the cooling air path 110 through the three-way valve 410.

[0048] Figure 6 This is a schematic diagram of another cooling system provided in an embodiment of this application. See also... Figure 6 ,exist Figure 5 Based on the cooling system shown, the cooling system provided in this embodiment may further include: an ambient temperature detection device 610, which is communicatively connected to the controller 510 and used to detect the ambient temperature. The controller 510 is used to control the opening or closing of the cooling air path 110 through the three-way valve 410 according to the ambient temperature.

[0049] In some implementations, the controller can also communicate with the running time determination device and the air pressure detection device in the brake air circuit to control the opening or closing of the cooling air circuit based on the ambient temperature, the continuous running time of the transport tanker and the air pressure in the brake air circuit.

[0050] A runtime determination device refers to a device or module used to obtain the continuous runtime of a transport tanker truck. Exemplarily, the runtime determination device can be a terminal device communicating with the vehicle's CAN bus, directly reading the continuous operating time of the engine or motor from the vehicle control system. The runtime determination device can be an existing terminal device in the vehicle; this application embodiment does not limit this.

[0051] Figure 7 This is a schematic diagram of another cooling system provided in an embodiment of this application. Figure 1 Based on the cooling system shown, to improve cooling efficiency, see [reference needed]. Figure 7The cooling system provided in this embodiment also includes a pressure compensation device 710. The pressure compensation device 710 is installed on the cooling gas path 110 and is used to compensate the gas pressure in the cooling gas path 110. In this embodiment, the pressure compensation device 710 can further increase the gas pressure in the cooling gas path 110, thereby increasing the flow rate and volume of the gas ejected by the injection device 120, enhancing the turbulence effect of the airflow on the air inside the tank, and accelerating heat exchange.

[0052] Optionally, the controller can also be connected to a pressure compensation device to control the activation or deactivation of the pressure compensation device.

[0053] For example, the cooling system provided in this application embodiment can be integrated into the overall structure of a transport tanker truck. For instance, the air inlet of the cooling air path can be connected to the air outlet of the brake air storage device to ensure a stable air source. The spraying device adopts a different installation method depending on the type of transport tanker truck. For concrete mixer trucks, the multiple spiral nozzles of the spraying device can be fixed on the inner edge of the feed hopper, with the spray direction of the nozzles pointing towards the mixing area inside the tank, which avoids interference with the mixing blades and ensures that the vortex airflow evenly covers the concrete surface.

[0054] The cooling system provided in this application embodiment requires no additional independent gas source, directly utilizing the vehicle's existing brake air storage device to provide high-pressure gas, significantly reducing modification costs and system complexity. The various structural forms and installation schemes of the injection device ensure that the gas can act precisely and evenly inside the tank. Furthermore, the system's installation process fully considers compatibility with the original vehicle structure. Through optimized design such as the injection device's installation position, it minimizes the impact on the tank's integrity and the vehicle's original functions. This provides a practical active cooling technology solution for various types of transport tank trucks, especially special vehicles such as concrete mixer trucks that are sensitive to material temperature, helping to improve the quality stability of transported materials and expand the operational capabilities of transport tank trucks in high-temperature environments.

[0055] The following is combined with Figure 8 Taking a concrete mixer truck as an example, the cooling system applied to a concrete mixer truck is described below in conjunction with the cooling system provided in the embodiments of this application.

[0056] Figure 8This is a schematic diagram of another cooling system provided in this application embodiment. In some implementations, the cooling system provided in this application embodiment includes a cooling gas path 110, which is connected to a brake gas storage device 140 via a three-way valve 410. The brake gas storage device 140 supplies stored gas to the brake gas path 150 and the cooling gas path 110 respectively via the three-way valve 410. A pressure compensation device 710 is also provided on the cooling gas path 110 for pressure compensation of the gas supplied by the cooling gas path. One end of the cooling gas path 110 away from the brake gas storage device 140 is connected to a spray device 120. The spray device 120 includes multiple spiral nozzles arranged in an array, with spiral guide vanes inside the spiral nozzles to form a vortex airflow. The spiral nozzles are positioned at the edge of the feed hopper of the concrete mixer truck to spray the gas supplied by the cooling gas path into the tank of the concrete mixer truck. The cooling system also includes a controller 510 and an ambient temperature detection device 610. The controller 510 is communicatively connected to a three-way valve 410, the ambient temperature detection device 610, and a running time determination device 810, and is used to control the opening or closing of the cooling air circuit based on the ambient temperature, the continuous running time of the transport tanker, and the air pressure in the brake air circuit. The air pressure in the brake air circuit can be obtained through the three-way valve 410. The controller 130 is also connected to a pressure compensation device 710 and is used to control the activation or deactivation of the pressure compensation device 710.

[0057] Figure 9 This is a structural schematic diagram of a mixer truck provided in an embodiment of this application. Figures 1 to 8 Based on the cooling system shown, this application embodiment also provides a concrete mixer truck, which is a pneumatically braked transport tanker truck, and includes any of the cooling systems described in the embodiments of this application. See also Figure 9 During actual transportation, the gas in the brake air storage device 140 is injected into the tank of the mixer truck by the injection device 120 through the cooling air passage 110 to promote the circulation of air in the tank with air in the environment.

[0058] The concrete mixer truck provided in the application embodiment achieves dynamic cooling control of the concrete inside the tank by organically integrating the cooling system with the vehicle's brake air storage device and tank structure.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cooling system, characterized in that, A transport tanker truck using pneumatic braking, the transport tanker truck having a brake air storage device, the cooling system comprising: The cooling air path is connected to the brake air storage device; An injection device is connected to the cooling gas path, which is used to transport gas from the brake gas storage device to the injection device, and the injection device injects the gas transported by the cooling gas path into the tank of the transport tanker.

2. The cooling system according to claim 1, characterized in that, Also includes: A pressure compensation device is installed on the cooling gas path to compensate the pressure of the gas transported in the cooling gas path.

3. The cooling system according to claim 1, characterized in that, The spraying device includes multiple nozzles arranged in an array.

4. The cooling system according to claim 3, characterized in that, The nozzle includes a spiral nozzle, and a spiral guide vane is provided inside the spiral nozzle to form a vortex airflow.

5. The cooling system according to claim 4, characterized in that, The guiding angle of the spiral guide vane is in the range of 25° to 35°.

6. The cooling system according to any one of claims 1-5, characterized in that, The transport tanker includes a concrete mixer truck, which includes a feed hopper connected to the tank body of the concrete mixer truck. The spraying device is located at the edge of the feed hopper and is used to spray the gas transported by the cooling gas path into the tank body of the concrete mixer truck.

7. The cooling system according to any one of claims 1-5, characterized in that, Also includes: A three-way valve is connected to the brake gas storage device, the cooling gas circuit, and the brake gas circuit of the transport tanker, and is used to deliver the gas stored in the brake gas storage device to the cooling gas circuit and the brake gas circuit.

8. The cooling system according to claim 7, characterized in that, Also includes: The controller is communicatively connected to the three-way valve and is used to control the opening or closing of the cooling gas path through the three-way valve.

9. The cooling system according to claim 8, characterized in that, Also includes: An ambient temperature detection device is communicatively connected to the controller and is used to detect the ambient temperature.

10. A mixer truck, characterized in that, The mixer truck is a pneumatically braked transport tanker truck, and the mixer truck includes a cooling system as described in any one of claims 1 to 9.

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