A small intelligent testing machine for preparing foamed asphalt

Abstract

The present invention discloses a small intelligent testing machine for preparing foamed asphalt, comprising a shell assembly with an ingenious structure, wherein asphalt, a water pipeline circulation system, an asphalt tank, a water tank, a controller, and an operating table are reasonably distributed inside and outside the shell assembly, so that the overall size of the testing machine is compact and convenient for use with mixing equipment for testing. A plurality of opening and closing doors are provided on the shell, which are convenient for observing the test process and for repairing, adjusting, and maintaining the internal parts of the equipment. Angle seat valves that can realize automatic control are respectively provided at the outlet of the asphalt tank and above the foaming chamber. According to the asphalt foaming test process and process conditions, various types of test work and post-test cleaning work can be realized through the coordinated use of the two angle seat valves. The angle seat valve cooperates with the servo motor, the control system, and the sensor components for collecting data to realize precise control of the liquid asphalt flow rate, which will be more convenient and accurate for determining and optimizing the proportion and process parameters before mass production.

Description

Technical Field

[0001] The invention relates to the technical field of foamed asphalt preparation, and in particular to a small intelligent testing machine for preparing foamed asphalt. Background Art

[0002] In modern pavement construction, hot asphalt mixing is no longer sufficient to meet production requirements. Compared to conventional hot asphalt processes, foamed asphalt technology offers the advantage of reducing asphalt usage. Furthermore, due to its low viscosity, foamed asphalt requires less time to mix the asphalt mixture. This significantly improves productivity, reduces the heating temperature of asphalt and aggregate, thereby reducing heat consumption during production and alleviating asphalt aging. It can fundamentally address the shortcomings of asphalt concrete, such as weak resistance to rutting, temperature cracking, fatigue damage, and loosening. Due to its energy-saving, environmentally friendly, and high economic benefits, foamed asphalt is widely used in road construction. Consequently, foamed asphalt-related technologies have also attracted widespread attention in the road construction machinery sector.

[0003] Asphalt foaming involves simultaneously introducing air, atomized water, and heated asphalt into a specific cavity. This creates a complex series of physical changes, rapidly increasing the volume of the original asphalt and producing a foamed asphalt with a sponge-like structure. This foamed asphalt exhibits excellent adhesion to the mixed material, enabling various road construction technologies, including foamed asphalt regeneration, warm-mix foamed asphalt, and cold-mix virgin material.

[0004] Two key performance indicators for foamed asphalt are the expansion ratio and half-life. The amount of water injected into the hot asphalt, the temperature of the hot asphalt, and the uniformity of the mixture of asphalt, water, and air all influence foaming quality. When foaming large quantities of asphalt during road construction, varying on-site environmental factors and construction process requirements dictate varying requirements for asphalt flow rate, temperature control, and the ratio of water to compressed air. These parameters require precise parameters to ensure foaming quality. Therefore, pilot production runs using foamed asphalt testing equipment are often conducted before mass production. These trials provide valuable guidance for determining and optimizing mix ratios and process parameters for mass production. Pilot production also provides experimental data for research into high-performance foamed asphalt technology.

[0005] Currently, the invention patent application number "201310279226.5," titled "Asphalt Foaming Machine and Foaming Method for Laboratory Preparation of Foamed Asphalt," addresses the issues of existing foaming machines, including poor operational stability, easily clogged and difficult to clean nozzles, and high costs. The invention patent application number "201810986561.1," titled "Foamed Asphalt Testing Machine," utilizes liquid metering and delivery mechanisms and electronic measuring instruments in both the asphalt and water branches to measure various unit parameters, laying a solid foundation for product quality improvement research before mass production. A colloid mill is then used as the foaming mechanism to achieve uniform dispersion of water in the asphalt, thereby improving the half-life of the foamed asphalt. The utility model patent application number "202022230447.1," titled "Asphalt Foaming Testing Device," utilizes a frame-supported movable asphalt foaming cart, which interacts with an asphalt foaming sampling barrel, a mixing tank, and a material conveying mechanism to obtain asphalt foaming data and data on the foamed asphalt mixture.

[0006] In summary, foamed asphalt test equipment plays an important role in the research on improving product quality before mass production, but the existing foamed asphalt test equipment still has the following defects: (1) The distribution of the pipelines of the asphalt and water pipeline system occupies a large area, making the test equipment too large and occupying a large area, unable to achieve the effect of compact structure and convenient use, and even more difficult to cooperate with the mixing equipment for testing; (2) Because the test machine operating table, various branch pipelines, valves, and electronic devices are installed in places where personnel cannot easily observe and operate, it is inconvenient to operate, repair, and routinely clean and maintain the test machine; (3) The asphalt tank is heavy and connected to the equipment shell components and various sensor components, so it is difficult to clean it in time after use; (4) After the test is completed, the asphalt pipeline circulation system and foaming chamber need to be cleaned in time. Failure to clean it in time will cause asphalt solidification and blockage of the pipeline, valves, asphalt pumps, and foaming chamber ports, affecting the next test. The existing asphalt pipeline is connected to the asphalt tank and the foaming chamber in one direction. It is necessary to clean the asphalt tank and then fill it with cleaning water for cleaning, making the cleaning work very cumbersome and time-consuming; (5) The coordination between the regulating valves installed on the asphalt and water pipeline systems, the foaming chamber regulating valves, and the control system can directly affect the foaming quality. The selection of appropriate valves and their corresponding control systems will make it more convenient and accurate to determine and optimize the ratio and process parameters before mass production. (6) The type and size of the asphalt foaming chamber will affect the asphalt foaming behavior and thus the quality of foamed asphalt preparation. The reasonable installation of sensors on the foaming chamber will provide the necessary conditions for the effective control of asphalt foaming. Therefore, a small intelligent testing machine for the preparation of foamed asphalt is proposed. Summary of the Invention

[0007] The object of the present invention is to provide a small intelligent testing machine for preparing foamed asphalt to solve the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a small intelligent testing machine for preparing foamed asphalt, characterized in that it includes a housing assembly, an asphalt pipeline circulation system, a water pipeline circulation system, a foaming chamber, and an automatic control system. The housing assembly is equipped with the asphalt pipeline circulation system, the water pipeline circulation system, and the foaming chamber, and the asphalt pipeline circulation system and the water pipeline circulation system are respectively connected to the foaming chamber. The automatic control system controls the operation of the asphalt pipeline circulation system, the water pipeline circulation system, and the foaming chamber, and simultaneously collects data parameter changes of various parts during operation.

[0009] The asphalt pipeline circulation system is provided with a plurality of multi-way valves capable of realizing automatic control, and a servo motor for controlling the flow and circulation of liquid asphalt;

[0010] A docking assembly that cooperates with the foamed asphalt mixture mixer is provided under the foaming cavity.

[0011] Preferably, the housing assembly includes a platform, an operating table, an upper cover above the platform, and a lower box below the platform. Below the lower box is a housing bottom plate, and a plurality of universal wheels are provided at the bottom of the housing bottom plate for convenient movement of the equipment, while the upper portion of the lower box supports and fixes the bottom surface of the platform. A water pipe circulation system and an asphalt pipe circulation system are arranged and installed on the platform, and their pipelines are centrally arranged inside the upper cover and covered by it. The operating table is located at the front end of the housing assembly and on one side of the platform, and the operating table is designed with an inclined surface.

[0012] Preferably, the upper cover body consists of a fixed cover, a sliding door that can be slid open laterally on the fixed cover, an extension cover integrally provided with the fixed cover, and a side cover body that can be flipped open on the extension cover; the fixed covers are vertically fixedly installed on both sides of the platform, and a cover body slide rail is fixedly installed on the outer side of the fixed cover, and the cover body slide rail cooperates with one end of a plurality of cover body sliders to be slidably connected on the cover body slide rail, and the other end of the cover body slider is fixed to the lower end of the sliding door, so that the sliding door can slide open in the direction of the extension cover; the bottom of the extension cover is fixed to one end of the platform, and the upper edge of the side cover body is hinged on the extension cover, so that the lower edge of the side cover body can be flipped upward for opening and closing, a foaming chamber is provided in the extension cover, and cover body handles are provided on the sliding door and the side cover body; a hole is provided under the extension cover to allow the foaming chamber to extend partly and dock with the blender through a docking assembly;

[0013] Preferably, the lower box body includes a raw material cabinet and a control box, which are fixed on the bottom plate of the shell, raw material cabinet doors are provided on both sides of the raw material cabinet, and control box doors are provided on the side and front end of the control box. Water tanks and asphalt tanks are placed in the raw material cabinet, and the water tanks and asphalt tanks are respectively connected to the pipelines of the water pipe circulation system and the asphalt pipe circulation system provided in the upper cover body; an operating table is fixedly connected to the control box, a PLC controller is provided in the control box, and the PLC controller is connected to the operating table and various sensor components through data cables, and a human-computer interactive touch display and multiple control and adjustment buttons are provided on the operating table.

[0014] Preferably, the asphalt pipeline circulation system includes an asphalt tank, a circulation pipeline and an asphalt pump. The upper end of the asphalt tank is connected to the circulation pipeline. The circulation pipeline is arranged on the platform and in the upper cover. The asphalt pump is arranged inside the circulation pipeline. The asphalt pump is driven by a servo motor, and the servo motor is controlled by a PLC controller.

[0015] Preferably, the circulation pipeline includes an asphalt suction pipe, a pumping pipe, and an asphalt return pipe. One end of the asphalt suction pipe extends into the asphalt tank to suck out the liquid asphalt in the asphalt tank, and the other end of the asphalt suction pipe enters the fixed cover and is connected to one of the channels of the No. 1 angle seat valve. The other channel of the No. 1 angle seat valve is connected to the asphalt pump. The lower channel of the No. 1 angle seat valve is connected to one end of the hose, and the hose can be placed in an asphalt cleaning liquid barrel or an external asphalt barrel. The outlet end of the asphalt pump is connected to one end of the pumping pipe, and the other end of the pumping pipe is connected to the channel on one side of the No. 2 angle seat valve. The channel below the No. 2 angle seat valve is connected to the upper opening of the foaming chamber. The No. 2 angle seat valve has a channel connected to one end of the asphalt return pipe, and the other end of the asphalt return pipe bypasses the servo motor and is arranged along the other side of the upper cover and is connected to the interior of the asphalt tank. The No. 1 angle seat valve, the asphalt pump, and the pumping pipe are arranged on one side of the sliding door, the servo motor is arranged in the middle of the sliding door, the No. 2 angle seat valve and the foaming chamber are arranged in the middle of the extension cover and the side cover, and a one-way valve is provided on the pumping pipe to prevent asphalt backflow.

[0016] Preferably, the asphalt tank is installed on one side of the platform and is located in the raw material cabinet. A fan-shaped cover is hinged on the asphalt tank, a valve that can be opened is provided at the bottom of the asphalt tank, a handle for lifting is fixedly connected to the fan-shaped cover, a filter assembly is provided under the fan-shaped cover, a heating system is provided on the asphalt tank, a circulation pipeline, an asphalt pump, and a foaming chamber, and an asphalt tank pressure sensor is provided on the support ear of the asphalt tank.

[0017] Preferably, the filter assembly includes a filter tank for allowing the asphalt to slowly penetrate into the asphalt tank, the filter tank is placed on a filter tank bracket, the filter tank bracket is fixed in the asphalt tank, and a handle is provided on the filter tank.

[0018] Preferably, the heating system includes an electric heating plate arranged at the bottom of the asphalt tank, a plurality of annular heating rings arranged in the side wall, and an electric heating tape spirally wound around the circulation pipeline, the asphalt pump, and the outside of the foaming chamber. The heating system is connected to a PLC controller.

[0019] Preferably, the water pipe circulation system includes a water tank, the water tank is fixed on one side of the platform, next to the asphalt tank, the water tank is connected to a water pipeline, the water pipeline is arranged in the upper cover body, next to the asphalt pipeline; one end of the water suction pipe is inserted into the water tank, the other end of the water suction pipe is connected to the water inlet end of the water pump, the water outlet end of the water pump is connected to one end of the outlet pipe, the other end of the outlet pipe is fixedly connected to an interface of the three-way valve, the other two interfaces of the three-way valve are respectively connected to one end of the return pipe and the water supply pipe, and the other end of the return pipe is fixedly connected to the water tank, and a safety valve and a pressure sensor for detecting reflux pressure are provided at one end of the return pipe near the three-way valve, a one-way valve and a pressure sensor for detecting foaming water pressure are provided on the water supply pipe, a pressure reducing valve is also provided on the water supply pipe, the other end of the water supply pipe is connected to a water hose, and the water hose is connected to one side of the foaming chamber, and a drain valve is also provided at the bottom of the water tank, the water suction pipe, water pump, water pump motor, water outlet pipe, three-way valve, safety valve, return pipe, and water supply pipe are all arranged on the inside of the fixed cover and the sliding door.

[0020] Preferably, the foaming chamber includes a cavity, an upper opening is provided above the cavity, the upper opening is connected to the No. 2 angle seat valve, the side of the cavity is designed to be a plane, and a quick-change interface for inserting a pressure sensor, a temperature sensor, and a water supply pipe is provided on the plane, a pressure sensor and a temperature sensor are provided on the cavity, and an outlet for discharging foamed asphalt is provided at the lower end or the lower end of the foaming chamber, both ends of the No. 2 angle seat valve are connected to the asphalt pipeline through a rotatable quick-release connector, and a docking assembly can be connected below the outlet, which is connected to the upper part of the mixing drum of the mixer through the docking assembly.

[0021] Preferably, the automatic control system includes:

[0022] A human-computer interactive touch display installed on the operating table is used to display the asphalt temperature, asphalt quality, water flow pressure, foaming temperature, foaming pressure, and test progress in real time;

[0023] Control buttons for controlling preheating and circulating heating of asphalt tanks, circulation pipelines, and foaming chambers, as well as foaming start and stop, reset, and emergency stop operations;

[0024] PLC controller placed in the control box;

[0025] As well as various sensors and drivers;

[0026] The PLC controller is electrically connected to the human-machine interactive touch display, control buttons, and various sensors and drivers.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention designs an equipment housing assembly with an ingenious overall structure, and rationally distributes the asphalt and water pipeline circulation system, asphalt tank, water tank, controller, and operating table inside and outside the equipment housing assembly, making the overall size of the testing machine compact and convenient for use with mixing equipment for testing.

[0029] 2. The shell assembly of the testing machine of the present invention is provided with multiple opening and closing doors, which is convenient for observing the test process, and is also convenient for repairing, adjusting and maintaining the internal parts of the equipment; specifically: a sliding door that can be slid open is provided above the asphalt and water pipe circulation system of the shell assembly, so that the various parts of the asphalt and water pipe circulation system can be intuitively seen from the upper part of the equipment; a flip-up side cover is provided on the side of the foaming chamber, which is convenient for observing the operation of the foaming chamber; opening and closing doors are provided on the left and right front and back walls of the shell assembly, which is convenient for repairing, adjusting and maintaining the various functional components under the internal platform of the shell assembly, and is also convenient for cleaning the asphalt tank and water tank; the operation panel is separately provided on the inclined surface on one side of the shell assembly for easy disassembly, and the shell wall where the control box is placed below it is also provided with an opening and closing door, which is convenient for operating the operation panel and debugging the control electrical components inside the control box.

[0030] 3. The asphalt tank of the present invention is provided with a filter tank with a handle and a bracket matched therewith, which can be easily disassembled and assembled, and is convenient for flushing and replacing the filter tank; sewage outlets for cleaning are provided on both the asphalt tank and the water tank.

[0031] 4. The present invention provides automatically controlled angle seat valves at the outlet of the asphalt tank and above the foaming chamber, respectively. According to the asphalt foaming test process and process conditions, the two angle seat valves are used in conjunction to realize the flow of asphalt pipeline cleaning liquid or liquid hot asphalt, thereby realizing the circulation of cleaning liquid or liquid hot asphalt in the pipeline; one end of the angle seat valve can be connected to the cleaning liquid barrel through a changeable channel. When cleaning the asphalt pipeline, the asphalt pipe washing circulation system and the asphalt tank can be separated, and the asphalt pipeline can be cleaned by circulating the cleaning liquid in the asphalt pipeline; the design of the angle seat valve can also realize two ways of injecting liquid asphalt into the asphalt pipeline circulation system, one is that the angle seat valve changes the channel to connect to the asphalt tank, and the other is that the angle seat valve changes the channel to connect to liquid asphalt heated elsewhere; multiple methods not only facilitate the test work, but also realize the uniform heating of the asphalt through the circulation of liquid hot asphalt in the asphalt pipeline.

[0032] 5. The angle seat valve capable of automatic control of the present invention can also cooperate with a servo motor connected to an asphalt pump and a control system to achieve precise control of the flow of liquid asphalt, which will be more convenient and accurate in determining and optimizing the ratio and process parameters before batch production.

[0033] 6. The automatic control system proposed in the present invention facilitates data collection during the test because various sensors are installed to detect the temperature and weight of the asphalt in the asphalt tank, the temperature of the asphalt pipeline, the pressure value of the foaming water, and the temperature and pressure fields inside the foaming chamber. The collected real-time data is displayed on the operation panel, which is convenient for recording the data during the test.

[0034] 7. The design of the inner cavity type and size of the asphalt foaming cavity and the setting of the external sensor of the foaming cavity provide a suitable working environment for asphalt foaming control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the main structure of the overall structure of the present invention;

[0036] Figure 2 It is a schematic diagram of the top view of the overall structure of the present invention;

[0037] Figure 3 It is a left side schematic diagram of the overall structure of the present invention;

[0038] Figure 4 A first perspective perspective view of the housing assembly of the present invention;

[0039] Figure 5 A second perspective view of the housing assembly of the present invention;

[0040] Figure 6 This is a schematic structural diagram of the asphalt pipeline circulation system of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of the asphalt tank of the present invention from a top view;

[0042] Figure 8 This is a schematic diagram of the structure of the asphalt tank of the present invention from an upward perspective;

[0043] Figure 9 It is a structural schematic diagram of the filter tank of the present invention;

[0044] Figure 10 Schematic top view of the water pipe circulation system of the present invention;

[0045] Figure 11 Schematic diagram of the structure of the foaming cavity of the present invention.

[0046] In the figure: 1. Shell assembly, 101. Operation table, 102. Control box, 103. Control box door, 104. Raw material cabinet, 105. Raw material cabinet door, 106. Universal wheel, 107. Fixed cover, 108. Sliding door, 109. Extended cover, 110. Side cover, 111. Cover handle, 112. Cover slider, 113. Cover rail, 114. Shell bottom plate, 115. Platform, 2. Asphalt pipeline circulation system, 201. Asphalt tank, 202. Asphalt tank pressure sensor, 203. Sector cover, 204. Asphalt suction pipe, 205. Angle seat valve No. 1, 206 , asphalt pump, 207, servo motor, 208, pumping pipe, 209, asphalt return pipe, 210, hose, 211, filter tank, 212, filter tank bracket, 213, No. 2 angle seat valve, 3, water pipe circulation system, 301, water tank, 302, water suction pipe, 303, water pump, 304, water pump motor, 305, outlet pipe, 306, three-way valve, 307, safety valve, 308, return pipe, 309, water pipe, 310, water hose, 311, pressure reducing valve, 4, foaming chamber, 401, quick-change interface, 402, upper mouth, 403, cavity, 404, outlet. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] See also Figure 1-3 The present invention provides a technical solution: a small intelligent testing machine for preparing foamed asphalt, comprising a shell component 1, an asphalt pipeline circulation system 2, a water pipeline circulation system 3, a foaming chamber 4, and an automatic control system. The shell component 1 is equipped with the asphalt pipeline circulation system 2, the water pipeline circulation system 3, and the foaming chamber 4. The asphalt pipeline circulation system 2 and the water pipeline circulation system 3 are respectively connected to the foaming chamber 4. The automatic control system controls the operation of the asphalt pipeline circulation system 2, the water pipeline circulation system 3, and the foaming chamber 4, and simultaneously collects data parameter changes of various parts during operation.

[0049] A docking assembly that cooperates with the foamed asphalt mixture mixer is provided under the foaming chamber 4 .

[0050] The docking assembly can be a docking opening and closing port provided on the mixing drum cover, and the outlet of the foaming chamber 4 can be aligned with the docking opening and closing port to spray the foamed asphalt.

[0051] In order to solve the problem that the distribution of asphalt pipelines and water pipeline circulation systems occupy a large area in the equipment, resulting in the test equipment being too large and occupying a large area, such as Figure 4-5 , a shell assembly 1 is designed, which includes a platform 115, an operating table 101, an upper cover above the platform 115 and a lower box below the platform 115, the bottom of the lower box is a shell bottom plate 114, and a plurality of universal wheels 106 are provided at the bottom of the shell bottom plate 114 for convenient movement of the equipment, while the top of the lower box supports and fixes the bottom surface of the platform 115; the water pipe circulation system 3 and the asphalt pipe circulation system 2 are arranged and installed on the platform 115, and their pipelines are concentratedly arranged on the inner side of the upper cover and covered by it, so that the layout of the water pipe circulation system 3 and the asphalt pipe circulation system 2 saves equipment space and achieves a compact equipment structure; by opening the upper cover, it is convenient to operate, observe and repair various components on the water pipe circulation system 3 and the asphalt pipe circulation system 2; the operating table 101 is located at the front end of the shell assembly 1 and on one side of the platform 115, and the inclined surface design of the operating table 101 makes it convenient for staff to operate the human-computer interactive touch display interface and observe real-time test data. The design of the housing assembly 1 can make the overall structure of the test equipment compact, making it easier to cooperate with the stirring equipment for testing.

[0052] Among them, a sliding door 108 that can be slid open is set in the middle of the upper cover body, so that the various components of the asphalt and water pipe circulation system can be intuitively seen from the upper part of the equipment; a side cover body 110 that can be opened is set on the side of the foaming chamber 4, which can facilitate the observation of the operation of the foaming chamber. Specifically, the upper cover body is composed of a fixed cover 107, a sliding door 108 that can slide open laterally on the fixed cover 107, an extension cover 109 integrally arranged with the fixed cover 107, and a side cover body 110 that can be flipped open on the extension cover 109; the specific way of sliding the sliding door 108 to open is: the fixed cover 107 is vertically fixedly installed on both sides of the platform 115, and a cover body slide rail 113 is fixedly installed on the outer side of the fixed cover 107. The cover body slide rail 113 is slidably connected to one end of a plurality of cover body sliders 112, and the other end of the cover body slider 112 is fixed to the lower end of the sliding door 108, so that the sliding door 108 can slide open toward the extension cover 109, so as to operate the test steps, observe the test conditions or perform maintenance and other operations. The side cover 110 is opened as follows: the bottom of the extension cover 109 is fixed to one end of the platform 115, and the extension cover 109 is hinged to the upper side of the side cover 110, so that the lower side of the side cover 110 can be opened and closed. The extension cover 109 is provided with a foaming chamber 4. Flipping the side cover 110 upward allows for easy inspection and observation of the foaming chamber 4. The sliding door 108 and the side cover 110 are both provided with cover handles 111. A hole is provided at the bottom of the extension cover 109 to allow the foaming chamber 4 to partially extend, so that it can be docked with the blender through a docking assembly.

[0053] The lower box body is provided with opening and closing doors on the front, back, left and right sides, which are convenient for repair, adjustment and maintenance of the functional components below the internal platform of the shell assembly, and also for cleaning of the asphalt tank and water tank; specifically: the lower box body includes a raw material cabinet 104 and a control box 102, and the raw material cabinet 104 and the control box 102 are fixed on the shell bottom plate 114, and raw material cabinet doors 105 are provided on both sides of the raw material cabinet 104, and control box doors 103 are provided on the side and front end of the control box 102, so that the lower box body can be opened from all directions to observe the interior of the lower box body and to inspect its interior. A water tank 301 and an asphalt tank 201 are placed in the raw material cabinet 104, and the water tank 301 and the asphalt tank 201 are respectively connected to the pipelines of the water pipeline circulation system 3 and the asphalt pipeline circulation system 2 arranged in the upper cover body. The control box 102 is fixedly connected to the operating console 101. A PLC controller is set in the control box 102. The PLC controller is connected to the operating console 101 and various sensor components through data cables. The operating console 101 is provided with a human-computer interactive touch display and multiple control and adjustment buttons.

[0054] like Figure 6 The asphalt pipeline circulation system 2 includes an asphalt tank 201, a circulation pipeline, and an asphalt pump 206. The upper end of the asphalt tank 201 is connected to the circulation pipeline, which is arranged on the platform 115 and in the upper cover. The asphalt pump 206 is arranged inside the circulation pipeline to achieve a space-saving and compact layout. The asphalt pump 206 is driven by a servo motor 207, which is controlled by a PLC controller.

[0055] Among them, two angle seat valves are set in the circulation pipeline, which solves the problem of inconvenient cleaning of the asphalt pipeline circulation system and diversifies the use of the asphalt pipeline circulation system. Specifically, the circulation pipeline includes an asphalt suction pipe 204, a pumping pipe 208, and an asphalt return pipe 209. One end of the asphalt suction pipe 204 extends into the asphalt tank 201 to suck out the liquid asphalt in the asphalt tank 201. The other end of the asphalt suction pipe 204 enters the fixed cover 107 and is connected to one channel of the No. 1 angle seat valve 205. The other channel of the No. 1 angle seat valve 205 is connected to the asphalt pump 206. The lower channel of the No. 1 angle seat valve 205 is connected to one end of the hose 210. The hose 210 can be placed in an asphalt cleaning liquid barrel or an external asphalt barrel. The hose 210 is used to connect the asphalt pipeline circulation system to the outside. The outlet end of the asphalt pump 206 is connected to one end of the pumping pipe 208, and the other end of the pumping pipe 208 is connected to the channel on one side of the No. 2 angle seat valve 213. The channel below the No. 2 angle seat valve 213 is connected to the foaming chamber 4 The upper opening 402 of the second angle seat valve 213 has a channel connected to one end of the asphalt return pipe 209, and the other end of the asphalt return pipe 209 bypasses the servo motor 207 and is arranged along the other side of the upper cover and connected to the interior of the asphalt tank 201. The heated liquid asphalt is pumped into the second angle seat valve 213 through the asphalt pump 206, and is controlled by the second angle seat valve 213 to enter the foaming chamber 4 for foaming or enter the asphalt return pipe 209 and flow back to the asphalt tank 201. The first angle seat valve 205, the asphalt pump 206, and the pumping pipe 208 are arranged on one side of the sliding door 108, the servo motor 207 is arranged in the middle of the sliding door 108, and the second angle seat valve 213 and the foaming chamber 4 are arranged in the middle of the extending cover 109 and the side cover 110; the use of the second angle seat valve 213 and the foaming chamber 4 can more accurately and conveniently control the amount of liquid asphalt input into the foaming chamber 4.

[0056] The design of the No. 1 angle seat valve 205 allows the asphalt pipeline circulation system to have multiple modes: when the lower end of the hose 210 is placed in the asphalt cleaning liquid barrel and the No. 1 angle seat valve 205 connects the hose 210 and the asphalt pump 206, the hose 210 extracts the asphalt cleaning liquid, and the asphalt pump 206 introduces the washing liquid through the hose 210 into the circulation pipeline system for circulation, thereby cleaning the pipeline of the asphalt pipeline circulation system 2; and when the lower end of the hose 210 is placed in an external asphalt barrel and the No. 1 angle seat valve 205 connects the hose 210 and the asphalt pump 206, the effect is the same as the No. 1 angle seat valve 205 connecting the asphalt tank 201, and thus the asphalt pipeline circulation system can use the asphalt tank 201 inside the equipment for foaming test, and can also use an external asphalt barrel for foaming test, thereby diversifying the test methods.

[0057] like Figure 7-8The asphalt tank 201 is mounted on one side of the platform 115, located inside the raw material cabinet 104. A fan-shaped cover 203 is hingedly connected to the asphalt tank 201, and a handle for lifting is fixedly connected to the fan-shaped cover 203. A valve that can be opened is provided at the bottom of the asphalt tank 201 to release excess asphalt after the test is completed and for subsequent cleaning. In order to filter the asphalt poured into the asphalt tank 201, a filter assembly is provided inside the asphalt tank 201 and under the fan-shaped cover 203. The filter assembly needs to be replaced and cleaned regularly. To this end, a filter tank that can be easily disassembled and assembled is designed to facilitate flushing and replacement of the filter tank; specifically, Figure 9 The filter assembly includes a filter tank 211, which is placed on a filter tank bracket 212. The filter tank bracket 212 is fixed in the asphalt tank 201 and is used to filter the asphalt so that the asphalt slowly penetrates into the asphalt tank 201. A handle is provided on the filter tank 211 to facilitate taking out the filter tank 211 for flushing.

[0058] An asphalt tank pressure sensor 202 is installed on the lug of the asphalt tank 201. This sensor measures the weight of the tank 201 in real time, allowing calculation of the remaining asphalt in the tank and calibration of the asphalt. A heating system is installed on the asphalt tank 201, the circulation pipeline, the asphalt pump 206, and the foaming chamber 4. This system provides both preheating and circulating heating. It comprises an electric heating plate located at the bottom of the tank 201, multiple annular heating coils located in the sidewalls, and an electric heating cable spirally wound around the circulation pipeline, the asphalt pump 206, and the exterior of the foaming chamber 4. The heating method for the asphalt tank 201 is determined by the quality of the asphalt, preventing asphalt aging due to excessive temperatures. The heating cable also provides insulation. Power to the heating system is controlled by the console 101. Temperature sensors are also installed on the asphalt suction pipe 204, the pumping pipe 208, and the asphalt return pipe 209, displaying real-time temperatures on the console's interactive touchscreen display.

[0059] The asphalt pump 206 is arranged inside the upper cover body, and a one-way valve is provided on the pumping pipe 208 to prevent asphalt backflow to avoid damage to the asphalt pump 206. The asphalt pump 206 is accurately controlled by the servo motor 207, thereby achieving precise control of the pumping volume.

[0060] As an indispensable part of asphalt foaming process, in order to reduce its occupied area, such as Figure 10The water pipe circulation system 3 includes a water tank 301, which is fixed on one side of the platform 115 and next to the asphalt tank 201. The water tank 301 is connected to a water pipeline, which is arranged in the upper cover body, next to the asphalt pipeline, making full use of the space of the upper cover body and reducing the floor space; the water tank 301 is internally connected to one end of a water suction pipe 302 by an insert type, and the other end of the water suction pipe 302 is connected to the water inlet end of the water pump 303, and the water outlet end of the water pump 303 is connected to the water outlet pipe 305 The other end of the water outlet pipe 305 is fixedly connected to an interface of the three-way valve 306. The other two interfaces of the three-way valve 306 are respectively connected to one end of the return pipe 308 and the water supply pipe 309. The other end of the return pipe 308 is fixedly connected to the water tank 301. The water in the water tank 301 is extracted by the water pump 303 through the water suction pipe 302, enters the water outlet pipe 305 and flows into the three-way valve 306. The water is diverted by the three-way valve 306, part of which flows to the return pipe 308 and part of which flows to the water supply pipe 309. The water returns to the water tank 301 through the return pipe 308. A safety valve 307 and a pressure sensor are provided at one end of the return pipe 308 near the three-way valve 306 to detect the return pressure. A one-way valve and a pressure sensor are provided on the water supply pipe 309 to prevent damage to the water pump 303. A pressure reducing valve 311 is also provided on the water supply pipe 309 to control and adjust the flow rate of water entering the foaming chamber 4. The other end of the water supply pipe 309 is connected to a water hose 310, which is connected to the foaming chamber 4 to allow water to flow into the foaming chamber 4. In the figure, a drain valve is also provided at the bottom of the water tank 301 for discharging excess water at the end of the test. The water tank 301 is set in the raw material cabinet 104, and the water suction pipe 302, water pump 303, water pump motor 304, water outlet pipe 305, three-way valve 306, safety valve 307, return pipe 308, and water supply pipe 309 are all set on the inner side of the fixed cover 107 and the sliding door 108.

[0061] like Figure 11 The foaming chamber 4 includes a cavity 403, an upper port 402 is provided above the cavity 403, the upper port 402 is connected to the second angle seat valve 213, the side of the cavity 403 is designed to be a plane, and a quick-change interface 401 for inserting a pressure sensor and a temperature sensor is provided on the plane. The pressure sensor and the temperature sensor are provided on the cavity 403 to record the test and optimize the scheme. The two ends of the second angle seat valve 213 are connected to the asphalt pipeline through a rotatable quick-release connector, so that the second angle seat valve 213 can swing back and forth with the foaming chamber 4 to adjust the angle of the outlet 404 of the foaming chamber 4. The outlet 404 can be connected to a docking component. Through the use of the docking component and the adjustable angle outlet 404, the foamed asphalt is sprayed into the mixing drum of the mixer from the upper part.

[0062] The automatic control system includes a human-machine interactive touch display and control buttons installed on the operating console 101, a PLC controller placed in the control box 102, and various sensors and drivers. The PLC controller is electrically connected to the human-machine interactive touch display, control buttons, and various sensors and drivers. The human-machine interactive touch display is used to display the asphalt temperature, asphalt quality, water flow pressure, foaming temperature, foaming pressure, motor speed, and test progress in real time, and can also input relevant test parameters; the control buttons are used to control the preheating and circulating heating of the asphalt tank 201, the circulation pipeline, and the foaming chamber 4, as well as foaming start, reset, and emergency stop. The automatic control system is used in specific tests as follows:

[0063] Everything is ready. Press the asphalt heating button to start preheating. Start the electric heating plate, heating coil and electric heating tape to heat at a constant temperature and self-regulate according to the set temperature.

[0064] When the asphalt is heated to a set temperature (e.g., 130°C), the servo motor 207 serving as the power source for the asphalt circulation pipeline system is turned on to start circulating heating, and the liquid asphalt flows and heats in the asphalt circulation pipeline system;

[0065] When the asphalt is heated to the next set temperature (for example, 150°C), press the foaming start button to start foaming; the servo motor 207 and the water pump motor 304 start working, and at the same time, control the second angle seat valve 213, and the second angle seat valve 213 is connected to the foaming chamber 4. When the working time reaches the set foaming time, the foaming is completed and the work stops.

[0066] When the asphalt pipeline circulation system needs to be cleaned, the servo motor 207 is started through the operation on the human-computer interactive touch display, and at the same time, the angle seat valve 205 is controlled to change the asphalt delivery from the asphalt tank 201 to the delivery of asphalt cleaning liquid from the cleaning barrel.

[0067] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A small intelligent testing machine for preparing foamed asphalt, characterized in that: The invention comprises a shell component (1), an asphalt pipeline circulation system (2), a water pipeline circulation system (3), a foaming chamber (4), and an automatic control system. The shell component (1) is equipped with the asphalt pipeline circulation system (2), the water pipeline circulation system (3), and the foaming chamber (4). The asphalt pipeline circulation system (2) and the water pipeline circulation system (3) are respectively connected to the foaming chamber (4). The automatic control system controls the operation of the asphalt pipeline circulation system (2), the water pipeline circulation system (3), and the foaming chamber (4), and simultaneously collects data parameter changes of various parts during operation. A docking assembly that cooperates with a foamed asphalt mixture mixer is provided below the foaming chamber (4); The asphalt pipeline circulation system (2) is provided with a plurality of multi-way valves capable of realizing automatic control, and a servo motor (207) for controlling the flow rate and circulation flow of liquid asphalt; The asphalt pipeline circulation system (2) comprises an asphalt tank (201), a circulation pipeline and an asphalt pump (206). The upper end of the asphalt tank (201) is connected to the circulation pipeline. The asphalt pump (206) is arranged inside the circulation pipeline. The asphalt pump (206) is driven by a servo motor (207), and the servo motor (207) is controlled by a PLC controller. The circulation pipeline includes an asphalt suction pipe (204), a pumping pipe (208), and an asphalt return pipe (209). The multi-way valve capable of realizing automatic control includes a first angle seat valve (205) and a second angle seat valve (213). One end of the asphalt suction pipe (204) extends into the asphalt tank (201) to suck out the liquid asphalt in the asphalt tank (201). The other end of the asphalt suction pipe (204) enters the fixed cover (107) and is connected to one channel of the first angle seat valve (205). The other channel of the first angle seat valve (205) is connected to the asphalt pump (206). The lower channel of the first angle seat valve (205) is connected to one end of a hose (210). The hose (210) is placed in an asphalt cleaning liquid barrel or an external asphalt barrel. The outlet end of the asphalt pump (206) is connected to one end of the pumping pipe (208). The other end of (208) is connected to a channel on one side of the second angle seat valve (213), and the channel below the second angle seat valve (213) is connected to the upper opening (402) of the foaming chamber (4). The second angle seat valve (213) has a channel connected to one end of the asphalt return pipe (209), and the other end of the asphalt return pipe (209) bypasses the servo motor (207) and is arranged along the other side of the upper cover and is connected to the interior of the asphalt tank (201). The first angle seat valve (205), the asphalt pump (206), and the pumping pipe (208) are arranged on one side of the sliding door (108), the servo motor (207) is arranged in the middle of the sliding door (108), the second angle seat valve (213) and the foaming chamber (4) are arranged in the middle of the extension cover (109) and the side cover (110), and a one-way valve is provided on the pumping pipe (208) to prevent asphalt backflow; The foaming chamber (4) comprises a cavity (403), an upper opening (402) is provided above the cavity (403), and the upper opening (402) is connected to the second angle seat valve (213). The side of the cavity (403) is designed as a plane, and a quick-change interface (401) for inserting a pressure sensor, a temperature sensor, and a water hose (310) is provided on the plane. The pressure sensor and the temperature sensor are provided on the cavity (403). An outlet (404) for discharging foamed asphalt is provided at the lower end or the lower end of the foaming chamber (4). Both ends of the second angle seat valve (213) are connected to the asphalt pipeline via a rotatable quick-release joint; a docking assembly can be connected below the outlet (404), and the docking assembly is used to cooperate with the upper part of the mixing drum of the mixer.

2. A small intelligent testing machine for preparing foamed asphalt according to claim 1, characterized in that: The housing assembly (1) comprises a platform (115), an operating table (101), an upper cover above the platform (115) and a lower box below the platform (115); a housing bottom plate (114) is located below the lower box; a plurality of universal wheels (106) are provided at the bottom of the housing bottom plate (114) for convenient movement of the equipment, and the upper portion of the lower box supports and fixes the bottom surface of the platform (115); a water pipeline circulation system (3) and an asphalt pipeline circulation system (2) are arranged and installed on the platform (115), and their pipelines are all centrally arranged inside the upper cover and covered by the upper cover; the operating table (101) is located at the front end of the housing assembly (1) and on one side of the platform (115); and the operating table (101) is designed with an inclined surface; The upper cover body is composed of a fixed cover (107), a sliding door (108) that can be slid open on the fixed cover (107), an extension cover (109) that is integrally arranged with the fixed cover (107), and a side cover body (110) that can be flipped open on the extension cover (109); the fixed cover (107) is vertically fixedly installed on both sides of the platform (115), and a cover body slide rail (113) is fixedly installed on the outer side of the fixed cover (107). One end of a plurality of cover body sliders (112) is slidably connected to the cover body slide rail (113), and the other end of the cover body slider (112) is fixed on the sliding rail. The lower end of the door (108) allows the sliding door (108) to slide open in the direction of the extension cover (109); the bottom of the extension cover (109) is fixed to one end of the platform (115); the extension cover (109) is hinged to the upper side of the side cover body (110) so that the lower side of the side cover body (110) can be flipped upward for opening and closing; a foaming chamber (4) is provided in the extension cover (109); the sliding door (108) and the side cover body (110) are both provided with a cover handle (111); a hole is provided under the extension cover (109) for partially extending the foaming chamber (4) and docking with the mixer through a docking assembly; The lower housing comprises a raw material cabinet (104) and a control box (102). The raw material cabinet (104) and the control box (102) are fixed on a housing bottom plate (114). Raw material cabinet doors (105) are provided on both sides of the raw material cabinet (104). Control box doors (103) are provided on the side and front end of the control box (102). A water tank (301) and an asphalt tank (201) are placed in the raw material cabinet (104). The water tank (301) and the asphalt tank (201) are respectively connected to the pipelines of the water pipe circulation system (3) and the asphalt pipe circulation system (2) provided in the upper housing. The control box (102) is fixedly connected to an operating table (101). A PLC controller is provided in the control box (102). The PLC controller is connected to the operating table (101) and various sensor components via a data line. The operating table (101) is provided with a human-machine interactive touch display and a plurality of control and adjustment buttons.

3. The small intelligent testing machine for preparing foamed asphalt according to claim 2, characterized in that: The circulation pipeline is arranged on the platform (115) and in the upper cover.

4. The small intelligent testing machine for preparing foamed asphalt according to claim 3, characterized in that: described An asphalt tank (201) is installed on one side of the platform (115) and is located in the raw material cabinet (104). A fan-shaped cover (203) is hingedly connected to the asphalt tank (201). A valve that can be opened is provided at the bottom of the asphalt tank (201). A handle for lifting is fixedly connected to the fan-shaped cover (203). A filter assembly is provided under the fan-shaped cover (203). A heating system is provided on the asphalt tank (201), a circulation pipeline, an asphalt pump 206, and a foaming chamber 4. An asphalt tank pressure sensor (202) is provided on the support lug of the asphalt tank (201).

5. The small intelligent testing machine for preparing foamed asphalt according to claim 4, characterized in that: The filtering assembly comprises a filtering tank (211) for allowing asphalt to slowly penetrate into the asphalt tank (201); the filtering tank (211) is placed on a filtering tank bracket (212); the filtering tank bracket (212) is fixed in the asphalt tank (201); and a handle is provided on the filtering tank (211).

6. The small intelligent testing machine for preparing foamed asphalt according to claim 4, characterized in that: The heating system comprises an electric heating plate arranged at the bottom of the asphalt tank (201), a plurality of annular heating rings arranged in the side wall, an electric heating tape spirally wound around a circulation pipeline, an asphalt pump (206), and the outside of the foaming chamber (4), and the heating system is connected to a PLC controller.

7. The small intelligent testing machine for preparing foamed asphalt according to claim 4, characterized in that: The water pipe circulation system (3) comprises a water tank (301), which is fixed on one side of the platform (115) and next to the asphalt tank (201). The water tank (301) is connected to a water pipeline, which is arranged in the upper cover body and next to the asphalt pipeline. One end of a water suction pipe (302) is inserted into the water tank (301), the other end of the water suction pipe (302) is connected to the water inlet end of a water pump (303), the water outlet end of the water pump (303) is connected to one end of a water outlet pipe (305), the other end of the water outlet pipe (305) is fixedly connected to one interface of a three-way valve (306), the other two interfaces of the three-way valve (306) are respectively connected to one end of a return pipe (308) and a water supply pipe (309), and the other end of the return pipe (308) is fixedly connected to the water tank (301). 1), a safety valve (307) and a pressure sensor for detecting the return pressure are provided at one end of the return pipe (308) near the three-way valve (306), a one-way valve and a pressure sensor for detecting the pressure of the foaming water are provided on the water supply pipe (309), a pressure reducing valve (311) is also provided on the water supply pipe (309), the other end of the water supply pipe (309) is connected to a water hose (310), and the water hose (310) is communicated with one side of the foaming chamber (4), a drain valve is also provided at the bottom of the water tank (301), a water suction pipe (302), a water pump (303), a water pump motor (304), a water outlet pipe (305), a three-way valve (306), a safety valve (307), a return pipe (308), and a water supply pipe (309) are all provided on the inner side of the fixed cover (107) and the sliding door (108).

8. The small intelligent testing machine for preparing foamed asphalt according to claim 7, characterized in that: The automatic control system includes: The operating table (101) is installed with a display device for real-time display of asphalt temperature, asphalt quality, water flow pressure, foaming temperature, foaming Pressure, and test progress human-computer interactive touch display; Used to control the preheating and circulating heating of the asphalt tank (201), the circulation pipeline, and the foaming chamber (4), as well as the start and stop, reset, and emergency Control buttons for stop and wait operations; A PLC controller placed in the control box (102); As well as various sensors and drivers; The PLC controller is electrically connected to the human-machine interactive touch display, control buttons, and various sensors and drivers.

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