An asphalt foam warm mix mixing apparatus

Abstract

The utility model discloses an asphalt foam warm mixing stirring equipment relates to the asphalt production field, to solve the trace water temperature in the prior art is lower, directly into the asphalt can lead to asphalt cooling solidification, and further influence asphalt stirring effect's problem. The middle part fixedly connected with the inner temperature mixing jar body in the heat insulation outer jar body inside, a plurality of gas supply pipes are arranged between the heat insulation outer jar body inside lower extreme and inner temperature mixing jar body lower extreme equal interval, and each gas supply pipe upper end extends to the inner temperature mixing jar body inside lower end surface and all is fixedly connected with steam nozzle, and each gas supply pipe lower extreme all extends the heat insulation outer jar body lower end surface and is commonly fixedly connected with steam delivery pipe, through setting up steam nozzle and gas supply pipe system, adopt high temperature steam to replace traditional cold water injection mode, effectively avoided the local cooling solidification problem that low temperature water directly contacted asphalt leads to, significantly improved the uniformity and stability of asphalt foaming.

Description

Technical Field

[0001] This utility model relates to the field of asphalt production, specifically to an asphalt foam warm mixing equipment. Background Technology

[0002] Asphalt is a black or dark brown viscous liquid or semi-solid, mainly composed of hydrocarbons and their non-metallic derivatives, and is a residue from petroleum distillation or natural sedimentation. It is solid or semi-solid at room temperature, softens and becomes fluid upon heating, and re-solidifies upon cooling. Asphalt possesses excellent adhesion, waterproofing, and durability, making it the most important binder in road engineering. It is widely used for paving asphalt concrete pavements (such as highways and urban roads) and for waterproofing projects (such as roofing and basement damp-proofing).

[0003] For example, authorization announcement number CN209741608U discloses a foamed warm-mix asphalt mixing device, including an asphalt material pipe. The asphalt material pipe adopts a split structure, and heating oil pipes distributed at equal intervals are fixedly sleeved at the external interface of the asphalt material pipe. Mounting holes are opened on the outer wall of the top of several heating oil pipes, and branch oil pipes are fixedly installed inside the mounting holes. The end of each branch oil pipe away from the heating oil pipe is fixedly connected to the same main oil pipe. An oil pipe connector is fixedly installed on the main oil pipe. A first connecting flange and a second connecting flange are fixedly installed at both ends of the asphalt material pipe, respectively. This invention allows a small amount of water from the water guide pipe to enter the asphalt, achieving a foaming effect. The water fully contacts and mixes with the asphalt inside the asphalt material pipe, increasing the contact area between the asphalt and water, achieving a uniform foaming effect. The heat transfer oil is used to heat the flowing asphalt inside the asphalt material pipe, maintaining a certain temperature and ensuring its fluidity.

[0004] In the above-mentioned technology, the mixing equipment introduces a small amount of water into the asphalt through a water pipe to achieve the foaming effect. However, the temperature of the small amount of water is low, and direct introduction into the asphalt will cause the asphalt to cool and solidify, thus affecting the asphalt mixing effect. Therefore, the market urgently needs to develop an asphalt foam warm mixing equipment to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide an asphalt foam warm mixing equipment to solve the problem mentioned in the background art that the mixing equipment introduces a small amount of water into the asphalt through a water pipe to achieve the foaming effect, but the temperature of the small amount of water is low, and direct introduction into the asphalt will cause the asphalt to cool and solidify, thereby affecting the asphalt mixing effect.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an asphalt foam warm mixing equipment, comprising an insulated outer tank, an inner warm mixing tank fixedly connected to the middle of the inner interior of the insulated outer tank, a rotating shaft fixedly connected to the middle of the inner interior of the inner warm mixing tank, a mixing frame fixedly connected to both the upper and lower ends of the rotating shaft, a plurality of air supply pipes equally spaced between the lower end of the inner interior of the insulated outer tank and the lower end of the inner warm mixing tank, the upper end of each air supply pipe extending to the lower end face of the inner interior of the inner warm mixing tank and fixedly connected to a steam nozzle, and the lower end of each air supply pipe extending out of the lower end face of the insulated outer tank and jointly fixedly connected to a steam conveying pipe.

[0007] Preferably, a feed pipe is fixedly connected to the front end of the upper end of the inner temperature mixing tank, and the upper end of the feed pipe extends out of the upper end face of the heat-insulated outer tank. A discharge pipe is fixedly connected to the rear end of the lower end of the inner temperature mixing tank, and the lower end of the discharge pipe extends out of the lower end face of the heat-insulated outer tank.

[0008] Preferably, a heat-conducting oil inlet pipe is fixedly connected to the rear end of the upper surface of the heat-insulated outer tank, and a heat-conducting oil outlet pipe is fixedly connected to the front end of the lower surface of the heat-insulated outer tank.

[0009] Preferably, a first baffle plate is fixedly connected to both the front and rear ends of the middle section between the inner wall of the insulated outer tank and the outer wall of the inner temperature mixing tank. A first baffle opening is provided between the upper end of the first baffle plate and the inner wall of the insulated outer tank. A second baffle plate is fixedly connected to the middle section between the inner wall of the insulated outer tank and the outer wall of the inner temperature mixing tank. A second baffle opening is provided between the lower end of the second baffle plate and the inner wall of the insulated outer tank.

[0010] Preferably, a drive device is fixedly connected to the middle of the front end face of the heat-insulating outer tank, and a drive motor is fixedly installed inside the drive device.

[0011] Preferably, the rear end of the rotating shaft is connected to the middle of the rear end face of the inner temperature mixing tank through a first sealed bearing, the front end of the rotating shaft passes through the middle of the front end of the heat-insulated outer tank and the inner temperature mixing tank and extends into the drive device and is fixedly connected to the output shaft of the drive motor, and the front end of the rotating shaft is connected to the middle of the front end of the heat-insulated outer tank and the inner temperature mixing tank through a second sealed bearing.

[0012] Preferably, a pressure relief valve is fixedly connected to the front end of the middle part of the upper end of the heat-insulated outer tank, and the lower end of the pressure relief valve is fixedly connected to the upper end of the inner temperature mixing tank through a connecting pipe and communicates with the inside of the inner temperature mixing tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, by setting up a steam nozzle and a steam supply pipe system, high-temperature steam is used to replace the traditional cold water injection method, which effectively avoids the problem of local cooling and solidification caused by direct contact of low-temperature water with asphalt, and significantly improves the uniformity and stability of asphalt foaming.

[0015] (2) In this utility model, the double-layer tank structure combined with the baffle heat transfer oil heating system achieves uniform heating of asphalt through the meandering oil path formed by the baffle, ensuring that the asphalt maintains the optimal working temperature throughout the mixing process.

[0016] (3) In this utility model, a three-dimensional mixing structure with upper and lower double mixing racks is adopted, and the tiltable tank design not only improves the mixing efficiency of asphalt and steam, but also ensures safe production under high pressure steam environment through the automatic adjustment function of the pressure relief valve. Attached Figure Description

[0017] Figure 1 This is a front view of an asphalt foam warm mixing equipment according to the present invention.

[0018] Figure 2 This is a main sectional view of the air supply pipe of this utility model;

[0019] Figure 3 This is a main sectional view of the internal temperature mixing tank of this utility model;

[0020] Figure 4 This is a side sectional view of the present invention.

[0021] In the diagram: 1. Insulated outer tank; 101. Inner temperature mixing tank; 102. Feed pipe; 103. Discharge pipe; 104. Heat transfer oil inlet pipe; 105. Heat transfer oil outlet pipe; 2. Rotating shaft; 201. First sealed bearing; 202. Second sealed bearing; 203. Stirring frame; 3. First baffle plate; 301. First baffle port; 4. Second baffle plate; 401. Second baffle port; 5. Gas supply pipe; 501. Steam nozzle; 502. Steam delivery pipe; 6. Pressure relief valve; 601. Connecting pipe; 7. Drive device; 701. Drive motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4This utility model provides an embodiment of an asphalt foam warm-mix mixing device, comprising an insulated outer tank 1, an inner warm-mix tank 101 fixedly connected to the middle of the inner warm-mix tank 1, a feed pipe 102 fixedly connected to the front end of the upper end of the inner warm-mix tank 101, the upper end of the feed pipe 102 extending out of the upper surface of the insulated outer tank 1, and a discharge pipe 103 fixedly connected to the rear end of the lower end of the inner warm-mix tank 101, the lower end of the discharge pipe 103 extending out of the lower surface of the insulated outer tank 1. Multiple air supply pipes 5 are equally spaced between the lower end of the inner warm-mix tank 1 and the lower end of the inner warm-mix tank 101, each air supply pipe 5 extending to the lower surface of the inner warm-mix tank 101 and fixedly connected to a steam source. Nozzle 501, each air supply pipe 5 extends from the lower end of the insulated outer tank 1 and is fixedly connected to a steam conveying pipe 502. In the initial state, the entire insulated outer tank 1 is tilted towards the rear end. The lower end of the discharge pipe 103 is fixedly connected to a discharge valve. Asphalt raw materials are injected into the inner temperature mixing tank 101 through the feed pipe 102. After the asphalt is added into the inner temperature mixing tank 101, it is simultaneously conveyed to multiple air supply pipes 5 through the steam generator and the steam conveying pipe 502. This allows multiple air supply pipes 5 to spray steam into the asphalt inside the inner temperature mixing tank 101 through multiple steam nozzles 501 to foam it. The high temperature of the steam itself prevents the asphalt from hardening after contact with it.

[0024] Please see Figure 4 A rotating shaft 2 is fixedly connected to the middle of the inner temperature mixing tank 101. A mixing rack 203 is fixedly connected to both the upper and lower ends of the rotating shaft 2. A driving device 7 is fixedly connected to the middle of the front end face of the heat-insulated outer tank 1. A driving motor 701 is fixedly installed inside the driving device 7. The rear end of the rotating shaft 2 is connected to the middle of the rear end face of the inner temperature mixing tank 101 through a first sealed bearing 201. The front end of the rotating shaft 2 passes through the middle of the front end of the heat-insulated outer tank 1 and the inner temperature mixing tank 101 and extends into the driving device 7 and is fixedly connected to the output shaft of the driving motor 701. The front end of the rotating shaft 2 is connected to the middle of the front end of the heat-insulated outer tank 1 and the inner temperature mixing tank 101 through a second sealed bearing 202. The driving motor 701 drives the rotating shaft 2 to rotate, so that the rotating shaft 2 synchronously drives the two mixing racks 203 to stir the asphalt, so that the steam and asphalt are fully mixed and foamed.

[0025] Please see Figure 2 and Figure 4A heat transfer oil inlet pipe 104 is fixedly connected to the rear end of the upper end face of the heat-insulated outer tank 1, and a heat transfer oil outlet pipe 105 is fixedly connected to the front end of the lower end face of the heat-insulated outer tank 1. A first baffle plate 3 is fixedly connected to both the front and rear ends of the middle section between the inner wall of the heat-insulated outer tank 1 and the outer wall of the inner temperature mixing tank 101. A first baffle port 301 is provided between the upper end of the first baffle plate 3 and the inner wall of the heat-insulated outer tank 1. A second baffle plate 4 is fixedly connected to the middle section between the inner wall of the heat-insulated outer tank 1 and the outer wall of the inner temperature mixing tank 101. A second baffle port 401 is provided between the lower end of the second baffle plate 4 and the inner wall of the heat-insulated outer tank 1. Heat transfer oil is injected between the heat-insulated outer tank 1 and the inner temperature mixing tank 101 through the heat transfer oil inlet pipe 104, and the heat transfer oil is fully circulated between the heat-insulated outer tank 1 and the inner temperature mixing tank 101 through the two first baffle plates 3 and the one second baffle plate 4 to heat the inner temperature mixing tank 101.

[0026] Please see Figure 4 A pressure relief valve 6 is fixedly connected to the front end of the middle part of the upper part of the heat-insulated outer tank 1. The lower end of the pressure relief valve 6 is fixedly connected to the upper end of the inner temperature mixing tank 101 through the connecting pipe 601 and communicates with the inside of the inner temperature mixing tank 101. The pressure relief valve 6 can relieve the pressure of the inner temperature mixing tank 101 when the air pressure inside the inner temperature mixing tank 101 is large.

[0027] Working Principle: During operation, preheated asphalt raw materials are first injected into the inner temperature mixing tank 101 through the feed pipe 102. Simultaneously, high-temperature heat transfer oil is introduced into the interlayer between the insulated outer tank 1 and the inner temperature mixing tank 101 through the heat transfer oil inlet pipe 104. Guided by the baffles (first baffle 3 and second baffle 4), the heat transfer oil forms a meandering flow, forming a circulation path through the first baffle port 301 and the second baffle port 401, thereby uniformly heating the inner temperature mixing tank 101 and maintaining the asphalt at its optimal working temperature. Then, the drive motor 701 is started, driving the rotating shaft 2 to rotate, causing the upper and lower mixing frames 203 to fully mix the asphalt. Simultaneously, high-temperature steam is introduced into the air supply pipe 5 through the steam delivery pipe 502. The steam is atomized by the steam nozzle 501 and sprayed into the asphalt, where it is fully mixed with the asphalt under the stirring action, achieving foaming. The high-temperature steam prevents localized cooling of the asphalt and promotes the foaming effect. After mixing is complete, the discharge valve of the discharge pipe 103 can be opened to output foamed warm-mix asphalt. During the process, the pressure relief valve 6 can automatically adjust the pressure inside the tank to ensure safe production.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An asphalt foam warm mixing equipment, comprising an insulated outer tank (1), characterized in that: An inner temperature mixing tank (101) is fixedly connected to the middle of the inner temperature mixing tank (101). A rotating shaft (2) is fixedly connected to the middle of the inner temperature mixing tank (101). A stirring rack (203) is fixedly connected to both the upper and lower ends of the rotating shaft (2). Multiple air supply pipes (5) are provided at equal intervals between the lower end of the inner temperature mixing tank (1) and the lower end of the inner temperature mixing tank (101). The upper end of each air supply pipe (5) extends to the lower end face of the inner temperature mixing tank (101) and is fixedly connected to a steam nozzle (501). The lower end of each air supply pipe (5) extends out of the lower end face of the inner temperature mixing tank (1) and is fixedly connected to a steam conveying pipe (502).

2. The asphalt foam warm mixing equipment according to claim 1, characterized in that: The front end of the inner temperature mixing tank (101) is fixedly connected to the feed pipe (102), the upper end of the feed pipe (102) extends out of the upper end face of the heat-insulated outer tank (1), and the rear end of the inner temperature mixing tank (101) is fixedly connected to the discharge pipe (103), the lower end of the discharge pipe (103) extends out of the lower end face of the heat-insulated outer tank (1).

3. The asphalt foam warm mixing equipment according to claim 1, characterized in that: A heat-conducting oil inlet pipe (104) is fixedly connected to the rear end of the upper end face of the heat-insulating outer tank (1), and a heat-conducting oil outlet pipe (105) is fixedly connected to the front end of the lower end face of the heat-insulating outer tank (1).

4. The asphalt foam warm mixing equipment according to claim 1, characterized in that: A first baffle plate (3) is fixedly connected at both ends of the middle section between the inner wall of the heat-insulating outer tank (1) and the outer wall of the inner temperature mixing tank (101). A first baffle port (301) is provided between the upper end of the first baffle plate (3) and the inner wall of the heat-insulating outer tank (1). A second baffle plate (4) is fixedly connected at the middle section between the inner wall of the heat-insulating outer tank (1) and the outer wall of the inner temperature mixing tank (101). A second baffle port (401) is provided between the lower end of the second baffle plate (4) and the inner wall of the heat-insulating outer tank (1).

5. The asphalt foam warm mixing equipment according to claim 1, characterized in that: A drive device (7) is fixedly connected to the middle of the front end face of the heat-insulating outer tank (1), and a drive motor (701) is fixedly installed inside the drive device (7).

6. The asphalt foam warm mixing equipment according to claim 5, characterized in that: The rear end of the rotating shaft (2) is connected to the middle of the rear end face of the inner temperature mixing tank (101) through a first sealed bearing (201). The front end of the rotating shaft (2) passes through the middle of the front end of the heat-insulated outer tank (1) and the inner temperature mixing tank (101) and extends into the drive device (7) and is fixedly connected to the output shaft of the drive motor (701). The front end of the rotating shaft (2) is connected to the middle of the front end of the heat-insulated outer tank (1) and the inner temperature mixing tank (101) through a second sealed bearing (202).

7. The asphalt foam warm mixing equipment according to claim 1, characterized in that: The upper middle front end of the heat-insulated outer tank (1) is fixedly connected to a pressure relief valve (6). The lower end of the pressure relief valve (6) is fixedly connected to the upper end of the inner temperature mixing tank (101) through a connecting pipe (601) and communicates with the inside of the inner temperature mixing tank (101).

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