Vertical shaft mixer for foamed bitumen and method of mixing
By using the ball screw lifting system and the openable and closable discharge gate design of the vertical shaft mixer, combined with the compound motion of the mixing blade frame, the problems of complicated discharge and poor stability of existing equipment have been solved, and efficient and uniform foamed asphalt mixture preparation has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HENAN BEIZHU ASPHALT FOAMING TECHNOLOGY CO LTD
- Filing Date
- 2026-05-29
- Publication Date
- 2026-07-14
Smart Images
Figure CN122377337A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mixing equipment technology, and in particular to a vertical shaft mixer suitable for foamed asphalt and its mixing method. Background Technology
[0002] In recent years, the mileage of asphalt pavement construction in China has continued to grow, and the mix proportion of asphalt mixtures needs to be determined through laboratory tests first.
[0003] Existing asphalt mixing equipment has many defects: after mixing, the pot or motor needs to be lowered, and the pot needs to be tilted manually and the asphalt mixture needs to be removed with the help of tools. The discharge process is complicated and inefficient. The vertical displacement of the pot or motor is carried out by chain drive, which has poor stability during operation and is prone to shaking and jamming. Summary of the Invention
[0004] The purpose of this invention is to provide a vertical shaft mixer and its mixing method suitable for foamed asphalt, so as to solve the problems existing in the prior art and achieve efficient discharge, stable lifting and lowering and high-quality mixing effect.
[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides a vertical shaft mixer suitable for foamed asphalt, comprising: a frame body on which a stirring driver is mounted; a mixing pot, which is slidably disposed vertically inside the frame body; a discharge gate that can be opened and closed is provided at the bottom of the mixing pot; a heating component is provided on the side wall of the mixing pot; an asphalt nozzle, which is installed at the outlet of a foamed asphalt testing machine and sprays foamed asphalt into the mixing pot through the upper opening of the mixing pot; a lifting system, which is a ball screw; the nut of the ball screw is fixedly connected to the mixing pot; and a stirring blade frame, which is connected to the output end of the stirring driver, the output end of the stirring driver being used to drive the stirring blade frame to rotate around a first axis and revolve around a second axis.
[0006] Preferably, one end of the discharge gate is rotatably connected to the mixing pot via a pin, and the other end of the discharge gate is connected to the mixing pot via a knob plunger.
[0007] Preferably, the discharge gate is provided with a handle.
[0008] Preferably, the stirring actuator has a first output shaft; a gearbox is fixedly provided at the end of the first output shaft; a large gear and a small gear are provided in the gearbox, and the large gear and the small gear mesh and drive each other; the large gear is fixedly connected to the frame body, and the large gear is rotatably connected to the first output shaft; a second output shaft is coaxially fixedly provided on the small gear; the second output shaft is rotatably provided in the gearbox, and the second output shaft is fixedly connected to the stirring blade frame.
[0009] Preferably, the gearbox includes a connecting sleeve, a lower housing, and an upper cover; the connecting sleeve is sleeved on the outside of the first output shaft, one end of the connecting sleeve is fixedly connected to the frame body, and the other end of the connecting sleeve is fixedly connected to the large gear; the upper cover covers the upper opening of the lower housing, and the upper cover and the lower housing together form an internal accommodating cavity; both the large gear and the small gear are disposed in the internal accommodating cavity; the end of the first output shaft extends into the internal accommodating cavity and is fixedly connected to the lower housing; the second output shaft is rotatably disposed in the internal accommodating cavity, one end of the second output shaft is fixedly connected to the small gear, and the other end of the second output shaft extends out of the internal accommodating cavity and is fixedly connected to the stirring blade frame.
[0010] Preferably, the heating component comprises multiple electric heating strips, and an insulation cotton layer is provided on the outer side of each electric heating strip.
[0011] Preferably, a sliding bracket is fixedly provided on the mixing pot; four guide columns are fixed on the frame body, and sliders are slidably sleeved on the guide columns, and each slider is fixedly connected to the sliding bracket.
[0012] Preferably, the ball screw includes a lifting motor and a lead screw; the lifting motor is fixedly mounted on the frame; one end of the lead screw is connected to the output end of the lifting motor via a coupling, and the other end is rotatably mounted on the base plate via a fixed bearing; the nut is slidably mounted on the base plate, and the nut is threadedly connected to the lead screw.
[0013] Preferably, the bottom of the frame is provided with multiple casters, and each caster has a braking assembly.
[0014] The present invention also provides a mixing method for a vertical shaft mixer suitable for foamed asphalt based on any one of the above claims, comprising the following steps: S1, move the entire device to the side of the foamed asphalt testing machine; S2, Install the asphalt nozzle on the outlet of the foamed asphalt testing machine and align it with the upper opening of the mixing pot; S3, the lifting system lowers the mixing pot to its lowest point, and the heating component is turned on to heat it to the set temperature. The mixture is then added to the mixing pot. The lifting system raises the mixing pot to its highest point, and the rotation of the mixing blades begins pre-mixing. After the set time is reached, foamed asphalt is sprayed into the mixing pot by the asphalt nozzle. After mixing for the set time again, the rotation of the mixing blades is stopped, and the discharge gate is manually opened. The mixed asphalt mixture is collected in a container below the mixing pot. After completion, the discharge gate is closed. S4, the mixing pot is lowered by the lifting system and the discharge door is opened to clean the residual mixture in the mixing pot.
[0015] The present invention achieves the following technical effects compared to the prior art: The vertical shaft mixer for foamed asphalt provided by this invention replaces the traditional manual tilting of the pot and tool-assisted material removal by setting an openable and closable discharge gate at the bottom of the mixing pot. Material can be quickly discharged simply by opening the bottom valve, greatly simplifying the operation process and improving efficiency. Combined with heating components on the side wall of the mixing pot, the temperature of the mixture is effectively maintained during mixing and discharge, avoiding difficulties in discharge or quality fluctuations caused by cooling. A ball screw is used as the lifting system, utilizing the rigidity of the screw drive to replace the wobbling and jamming problems of traditional chain drives, ensuring smooth operation and precise positioning of the mixing pot during lifting and eliminating instability during displacement. Through the combined motion design of the mixing blade frame's rotation and revolution, combined with the asphalt nozzle fixed at the outlet of the foamed asphalt testing machine directly spraying into the mixing pot, instantaneous mixing and three-dimensional shearing of the foamed asphalt and aggregates are achieved, significantly improving the uniformity and preparation quality of the mixture.
[0016] The present invention also provides a mixing method, which allows the equipment to be flexibly moved to the side of the foamed asphalt foaming device for in-situ mixing, reducing heat loss and asphalt defoaming during material transfer and ensuring the coating quality of the mixture; through the combined movement of the lifting system and the mixing blade frame, the mixture is fully preheated and uniformly mixed, and the bottom discharge gate eliminates the need to tilt the pot during the unloading process, making the operation simple and the unloading thorough, significantly improving the testing efficiency and the ease of use of the equipment. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1A schematic diagram of the overall structure of a vertical shaft mixer suitable for foamed asphalt provided by the present invention; Figure 2 A front view of the mixing bowl in a vertical shaft mixer suitable for foamed asphalt, provided by the present invention; Figure 3 A bottom view of the mixing bowl in a vertical shaft mixer suitable for foamed asphalt, provided by the present invention. Figure 4 A schematic diagram of the gearbox structure in a vertical shaft mixer suitable for foamed asphalt provided by the present invention; Figure 5 This is a partial structural diagram of the ball screw in a vertical shaft mixer suitable for foamed asphalt, provided by the present invention.
[0019] In the picture: 1-Frame body; 11-Transmission box; 12-Guide column; 13-Moving wheel; 2-Mixing vessel; 21-Discharge gate; 22-Pin; 23-Knob plunger; 24-Sliding bracket; 3-Lifting system; 31-Lifting motor; 32-Coupling; 33-Nut; 34-Lead screw; 35-Fixed bearing; 4-Agitator blade frame; 5-First output shaft; 51-Upper cover; 52-Lower housing; 53-Connecting sleeve; 54-Large gear; 55-Small gear; 56-Second output shaft; 57-Rotating bearing. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] The purpose of this invention is to provide a vertical shaft mixer and its mixing method suitable for foamed asphalt, so as to solve the problems existing in the prior art and achieve efficient discharge, stable lifting and lowering and high-quality mixing effect.
[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] Example 1 This embodiment provides a vertical shaft mixer suitable for foamed asphalt, comprising: Frame 1, on which a stirring actuator is mounted; The mixing pot 2 is slidably disposed inside the frame 1 in a vertical direction; the bottom of the mixing pot 2 is provided with a discharge door 21 that can be opened and closed; a heating component is provided on the side wall of the mixing pot 2. An asphalt nozzle is installed at the outlet of the foamed asphalt testing machine to spray foamed asphalt into the mixing tank 2 through the upper opening of the mixing tank 2. The lifting system 3 is a ball screw; the nut 33 of the ball screw is fixedly connected to the mixing pot 2. The stirring blade frame 4 is connected to the output end of the stirring driver. The output end of the stirring driver is used to drive the stirring blade frame 4 to rotate around the first axis and to revolve around the second axis.
[0024] By setting an openable and closable discharge gate 21 at the bottom of the mixing pot 2, the traditional method of manually tilting the pot and using tools to remove materials is replaced. The material can be discharged quickly simply by opening the bottom valve, greatly simplifying the operation process and improving efficiency. In conjunction with the heating components set on the side wall of the mixing pot 2, the temperature of the mixture is effectively maintained during the mixing and discharge process, avoiding discharge difficulties or quality fluctuations caused by cooling. A ball screw is used as the lifting system 3, which utilizes the rigidity advantage of the screw drive to replace the problems of easy shaking and jamming in the traditional chain drive. This makes the mixing pot 2 run smoothly and be accurately positioned during the lifting process, eliminating instability during displacement. Through the composite motion design of the rotation and revolution of the mixing blade frame 4, combined with the asphalt nozzle fixed at the outlet of the foamed asphalt testing machine directly spraying into the mixing pot 2, the foamed asphalt and aggregate are mixed instantly and three-dimensionally sheared, which significantly improves the uniformity and preparation quality of the mixture.
[0025] Specifically, the equipment can be moved as a whole next to the foamed asphalt generating equipment, so that foamed asphalt can be sprayed at the feed port above the mixing pot 2, and the mixture can be stirred while spraying foamed asphalt, resulting in better mixing effect of the mixture; the material discharge method is more convenient, that is, the bottom discharge door 21 can be opened directly to discharge the material without tilting the pot body; and the use of ball screw as the lifting system 3 is more stable.
[0026] Among them, such as Figure 1 As shown, the relevant explanations regarding frame 1 are as follows: In the optional solutions of this embodiment, it is more preferred that the bottom of the frame body 1 is provided with a plurality of movable wheels 13, and the movable wheels 13 are equipped with brake components (which are prior art and are intended to lock the position after movement).
[0027] Specifically, the frame 1 can also have feet that provide a fixing function after it is moved into position.
[0028] Among them, such as Figures 1-3 The following are the relevant instructions regarding mixing vessel 2: In the optional solutions of this embodiment, it is more preferred that one end of the discharge gate 21 is rotatably connected to the mixing pot 2 via a pin 22, and the other end of the discharge gate 21 is connected to the mixing pot 2 via a knob plunger 23 (the mixing pot 2 is provided with a hole structure that cooperates with the knob plunger 23 at the corresponding position).
[0029] Specifically, the bottom opening of the discharge gate 21 and the mixing pot 2 should be equipped with necessary sealing structures to ensure that the discharge gate 21 does not leak inside after it is closed.
[0030] In the optional solutions of this embodiment, it is more preferred that the discharge gate 21 is provided with a handle.
[0031] In the optional solutions of this embodiment, it is more preferred that the heating component is a plurality of electric heating strips, and the outer side of the electric heating strips is provided with a heat insulation cotton layer.
[0032] Among them, such as Figure 1 and Figure 5 As shown, the relevant descriptions regarding the lifting system 3 are as follows: In the optional solutions of this embodiment, a preferred embodiment is that a sliding bracket 24 is fixedly provided on the mixing pot 2; four guide columns 12 are fixedly provided on the frame body 1, and sliders are slidably sleeved on the guide columns 12, and each slider is fixedly connected to the sliding bracket 24.
[0033] In the optional solutions of this embodiment, the preferred embodiment is that the ball screw (which is an existing device) includes a lifting motor 31 and a lead screw 34; the lifting motor 31 is fixedly mounted on the frame 1; one end of the lead screw 34 is connected to the output end of the lifting motor 31 through a coupling 32, and the other end is rotatably mounted on the base plate through a fixed bearing 35; the nut 33 is slidably mounted on the base plate, and the nut 33 is threadedly connected to the lead screw 34.
[0034] Among them, such as Figure 1 and Figure 4 As shown, the relevant descriptions regarding the stirring blade frame 4 are as follows: In the optional solutions of this embodiment, a more preferred embodiment is that the stirring driver has a first output shaft 5 (the stirring driver is a transmission box 11, and the output shaft of the transmission box 11 is the first output shaft 5); a gearbox is fixedly provided at the end of the first output shaft 5; a large gear 54 and a small gear 55 are provided in the gearbox, and the large gear 54 and the small gear 55 mesh and drive each other; the large gear 54 is fixedly connected to the frame body 1, and the large gear 54 is rotatably connected to the first output shaft 5 (e.g., through a bearing); a second output shaft 56 is coaxially fixedly provided on the small gear 55, and the second output shaft 56 is rotatably provided in the gearbox (the second output shaft 56 is rotatably connected to the gearbox through two rotating bearings 57), and the second output shaft 56 is fixedly connected to the stirring blade frame 4.
[0035] In the optional embodiments of this example, the gearbox preferably includes a connecting sleeve 53, a lower housing 52, and an upper cover 51. The connecting sleeve 53 is sleeved on the outside of the first output shaft 5, one end of the connecting sleeve 53 is fixedly connected to the frame body 1, and the other end of the connecting sleeve 53 is fixedly connected to the large gear 54. The upper cover 51 covers the upper opening of the lower housing 52, and the upper cover 51 and the lower housing 52 together form an internal accommodating cavity. The large gear 54 and the small gear 55 are both disposed in the internal accommodating cavity. The end of the first output shaft 5 extends into the internal accommodating cavity and is fixedly connected to the lower housing 52 with a second output shaft 56. The second output shaft 56 is rotatably disposed in the internal accommodating cavity, one end of the second output shaft 56 is fixedly connected to the small gear 55, and the other end of the second output shaft 56 extends out of the internal accommodating cavity and is fixedly connected to the stirring blade frame 4.
[0036] Specifically, the axis of the first output shaft 5 is the first axis, and the axis of the second output shaft 56 is the second axis.
[0037] Example 2 This embodiment provides a mixing method for a vertical shaft mixer suitable for foamed asphalt based on Embodiment 1, including the following steps: S1, move the entire device to the side of the foamed asphalt testing machine; S2, Install the asphalt nozzle on the outlet of the foamed asphalt testing machine and align it with the upper opening of the mixing tank 2; S3, the mixing pot 2 is lowered to the lowest point by the lifting system 3, and the heating component is turned on to heat it to the set temperature. The mixture is added into the mixing pot 2. The lifting system 3 raises the mixing pot 2 to the highest point, and the pre-mixing is started by rotating the mixing blade frame 4. After the set time is reached, foamed asphalt is sprayed into the mixing pot 2 by the asphalt nozzle. After mixing for the set time again, the rotation of the mixing blade frame 4 is stopped, and the discharge door 21 is manually opened. The mixed asphalt mixture is collected in the container below the mixing pot 2. After completion, the discharge door 21 is closed. S4, the mixing pot 2 is lowered by the lifting system 3 and the discharge door 21 is opened to clean the residual mixture in the mixing pot 2.
[0038] The equipment can be flexibly moved to the foamed asphalt foaming device for in-situ mixing, reducing heat loss and asphalt defoaming during material transfer and ensuring the coating quality of the mixture. The combined movement of the lifting system 3 and the mixing blade frame 4 achieves full preheating and uniform mixing of the mixture. The bottom discharge gate 21 eliminates the need to tilt the pot during unloading, making operation simple and unloading thorough, significantly improving test efficiency and ease of use of the equipment.
[0039] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A vertical shaft mixer suitable for foamed asphalt, characterized in that: include: A frame structure on which a stirring actuator is mounted; A mixing pot is slidably disposed inside the frame body in a vertical direction; the bottom of the mixing pot is provided with a discharge door that can be opened and closed; a heating component is provided on the side wall of the mixing pot; An asphalt nozzle is installed at the outlet of the foamed asphalt testing machine to spray foamed asphalt into the mixing tank through the upper opening of the mixing tank. The lifting system is a ball screw; the nut of the ball screw is fixedly connected to the mixing pot. A stirring blade frame is connected to the output end of the stirring driver, and the output end of the stirring driver is used to drive the stirring blade frame to rotate around a first axis and revolve around a second axis.
2. The vertical shaft mixer suitable for foamed asphalt according to claim 1, characterized in that: One end of the discharge gate is rotatably connected to the mixing pot via a pin, and the other end of the discharge gate is connected to the mixing pot via a knob plunger.
3. The vertical shaft mixer suitable for foamed asphalt according to claim 2, characterized in that: The discharge gate is equipped with a handle.
4. The vertical shaft mixer suitable for foamed asphalt according to claim 1, characterized in that: The stirring driver has a first output shaft; a gearbox is fixedly provided at the end of the first output shaft; The gearbox is equipped with a large gear and a small gear, and the large gear meshes with the small gear for transmission. The large gear is fixedly connected to the frame body, and the large gear is rotatably connected to the first output shaft. The pinion is coaxially fixedly provided with a second output shaft; the second output shaft is rotatably disposed inside the gearbox, and the second output shaft is fixedly connected to the stirring blade frame.
5. The vertical shaft mixer suitable for foamed asphalt according to claim 4, characterized in that: The gearbox includes a connecting sleeve, a lower housing, and a top cover; The connecting sleeve is sleeved on the outside of the first output shaft, one end of the connecting sleeve is fixedly connected to the frame body, and the other end of the connecting sleeve is fixedly connected to the large gear. The upper cover fits over the upper opening of the lower housing, and the upper cover and the lower housing together form an internal accommodating cavity; both the large gear and the small gear are disposed within the internal accommodating cavity; The end of the first output shaft extends into the internal accommodating cavity and is fixedly connected to the lower housing. The second output shaft is rotatably disposed within the internal accommodating cavity. One end of the second output shaft is fixedly connected to the pinion gear, and the other end of the second output shaft extends out of the internal accommodating cavity and is fixedly connected to the stirring blade frame.
6. The vertical shaft mixer suitable for foamed asphalt according to claim 1, characterized in that: The heating component consists of multiple electric heating strips, and an insulation cotton layer is provided on the outside of the electric heating strips.
7. The vertical shaft mixer suitable for foamed asphalt according to claim 1, characterized in that: A sliding support is fixedly installed on the mixing pot; Four guide posts are fixed on the frame, and sliders are slidably mounted on the guide posts. Each slider is fixedly connected to the sliding bracket.
8. The vertical shaft mixer for foamed asphalt according to claim 1, characterized in that: The ball screw includes a lifting motor and a lead screw; The lifting motor is fixedly mounted on the frame. One end of the lead screw is connected to the output end of the lifting motor via a coupling, and the other end is rotatably mounted on the base plate via a fixed bearing; The nut is slidably mounted on the base plate, and the nut is threadedly connected to the lead screw.
9. The vertical shaft mixer suitable for foamed asphalt according to claim 1, characterized in that: The bottom of the frame is provided with multiple casters, and each caster has a brake assembly.
10. A mixing method for a vertical shaft mixer suitable for foamed asphalt based on any one of claims 1 to 9, characterized in that: Includes the following steps: S1, move the entire device to the side of the foamed asphalt testing machine; S2, Install the asphalt nozzle on the outlet of the foamed asphalt testing machine and align it with the upper opening of the mixing pot; S3, the lifting system lowers the mixing pot to its lowest point, and the heating component is turned on to heat it to the set temperature. The mixture is then added to the mixing pot. The lifting system raises the mixing pot to its highest point, and the rotation of the mixing blades begins pre-mixing. After the set time is reached, foamed asphalt is sprayed into the mixing pot by the asphalt nozzle. After mixing for the set time again, the rotation of the mixing blades is stopped, and the discharge gate is manually opened. The mixed asphalt mixture is collected in a container below the mixing pot. After completion, the discharge gate is closed. S4, the mixing pot is lowered by the lifting system and the discharge door is opened to clean the residual mixture in the mixing pot.