Processing device for cold patch asphalt mixture

Abstract

The utility model relates to a processing device for a cold patch asphalt mixture, which comprises a mixing stirrer, the mixing stirrer comprises a machine body, a first jacket is arranged on the outer side of the machine body, an auxiliary mixing tank is arranged above the machine body, a second jacket is arranged on the outer side of the auxiliary mixing tank, and the second jacket is arranged on the outer side of the machine body. Stirring devices are respectively arranged on the machine body and the auxiliary agent mixing tank; each stirring device comprises a stirring shaft, a stirring blade and a stirring motor; a first heat exchanger is arranged above the assistant mixing tank, the machine body is communicated with the first heat exchanger through a gas phase conveying pipe, the first heat exchanger is communicated with the assistant mixing tank through a gas phase conveying pipe, the first heat exchanger is communicated with the assistant mixing tank, the assistant mixing tank is communicated with the machine body through an assistant conveying pipe, and a first adjusting valve is arranged on the assistant conveying pipe. The dissipation rate of the additive, the anti-stripping agent and the diluent is reduced, so that the cold patch asphalt liquid reaches a preset ratio. The utility model has the advantages of convenient use and wide market prospect.

Description

Technical Field

[0001] The utility model relates to the field of processing equipment for cold-patch asphalt mixture, and specifically relates to a processing device for cold-patch asphalt mixture. Background Technique

[0002] As a rapid repair material, cold-patch asphalt mixture has been widely used in road engineering in recent years. As the main component of cold-patch material, cold-patch liquid plays a decisive role in the performance of the mixture. Compared with the disadvantages of high requirements for hot mix asphalt mixing conditions and inability to repair diseases in time, cold-patch asphalt liquid has the characteristics of convenient storage, convenient construction and immediate use; its appearance can effectively avoid the further expansion of road diseases and protect the road surface structure and driving safety. In the cold regions of northern China, the temperature is generally low in winter. When pothole diseases occur on the road surface, general cold-patch materials either have insufficient workability and are difficult to pave, or after the material is paved and compacted, the performance and strength cannot meet the requirements, resulting in looseness, particle dropping and other situations, which not only fail to repair the pothole diseases in time, but also aggravate the impact of the diseases. "Preparation and Optimization Design of Cold-Patch Asphalt Liquid in Cold Regions", author: Yang Yanhai; publisher: Journal of Shenyang Jianzhu University (Natural Science Edition); March 2023, Volume 39, Issue 2. Among them, the research gives the influence of the proportion between asphalt, additives, anti-stripping agents and diluents on the viscosity, adhesion and fluidity of the prepared cold-patch liquid, and also gives the influence of the volatilization of additives, anti-stripping agents and diluents on the adhesion.

[0003] In the actual production process, since asphalt is in a solid state at normal temperature, during the heating process of cold-patch asphalt liquid, additives, anti-stripping agents and diluents are added to the liquid asphalt to make cold-patch asphalt liquid. During the heating process, since additives, anti-stripping agents and diluents are in a heated state during the processing of cold-patch asphalt liquid, additives, anti-stripping agents and diluents will vaporize due to heat and be discharged together with the tail gas to the downstream. During the processing of cold-patch asphalt liquid, the vaporization of additives, anti-stripping agents and diluents will not only make the tail gas contain a large amount of organic components, resulting in increased difficulty in tail gas treatment. And since additives, anti-stripping agents and diluents are weighed before being put into the processing equipment, the large amount of escape of additives, anti-stripping agents and diluents during the processing will cause a difference between the performance of the prepared cold-patch asphalt liquid and the preset target. Therefore, there is room for improvement in the prior art in terms of reducing the large amount of escape of additives, anti-stripping agents and diluents to maintain the preset performance of the cold-patch asphalt liquid, thereby improving the cold-patch asphalt liquid after processing to reach the preset ratio. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the utility model provides a processing device for cold-patch asphalt mixture, which can reduce the escape rates of additives, anti-stripping agents and diluents during the processing of cold-patch asphalt liquid so that the cold-patch asphalt liquid reaches a preset ratio, and is used to overcome the defects in the prior art.

[0005] The technical solution adopted by the utility model is as follows: A processing device for cold-patch asphalt mixture includes a mixing and stirring machine. The mixing and stirring machine includes a machine body. A first jacket is arranged on the outer side of the machine body. An auxiliary agent mixing tank is arranged above the machine body. A second jacket is arranged on the outer side of the auxiliary agent mixing tank. Stirring devices are respectively arranged on the machine body and the auxiliary agent mixing tank. The stirring device includes a stirring shaft, stirring blades arranged on the stirring shaft and a stirring motor drivingly connected to the stirring shaft. A first heat exchanger is arranged above the auxiliary agent mixing tank. The inlet ends between the machine body and the inlet end of the heat source channel of the first heat exchanger and between the inlet end of the heat source channel of the first heat exchanger and the auxiliary agent mixing tank are respectively connected and communicated through a gas-phase conveying pipe. The outlet end of the heat source channel of the first heat exchanger is connected and communicated with the auxiliary agent mixing tank. The auxiliary agent mixing tank and the machine body are connected and communicated through an auxiliary agent conveying pipe. A first regulating valve is arranged on the auxiliary agent conveying pipe.

[0006] Preferably, a bracket is arranged on the outer side of the auxiliary agent mixing tank. A weight sensor is arranged between the bracket and the auxiliary agent mixing tank. The number of the weight sensors is several, and several weight sensors are evenly distributed in a star shape outside the central axis of the auxiliary agent mixing tank.

[0007] Preferably, each of the gas-phase conveying pipes is respectively and sequentially provided with a second regulating valve and a first pressure sensor along the direction from near the first heat exchanger to far from the first heat exchanger.

[0008] Preferably, the inlet end of a U-shaped liquid seal pipe is connected and communicated with the outlet end of the heat source channel of the first heat exchanger, and the outlet end of the U-shaped liquid seal pipe is connected and communicated with the top of the auxiliary agent mixing tank.

[0009] Preferably, it further includes a high-pressure steam conveying main pipe. The inlet end of the first jacket and the high-pressure steam conveying main pipe and the inlet end of the high-pressure steam conveying main pipe and the inlet end of the second jacket are respectively connected and communicated through high-pressure steam conveying branch pipes. Each high-pressure steam conveying branch pipe is respectively and sequentially provided with a third regulating valve and a second pressure sensor along the direction from near the high-pressure steam conveying main pipe to far from the high-pressure steam conveying main pipe.

[0010] Preferably, it further includes a second heat exchanger. The outlet end of the first jacket and the outlet end of the second jacket are both connected and communicated with the inlet end of the heat source channel of the second heat exchanger. The outlet end of the heat source channel of the second heat exchanger is connected and communicated with a desalted water recovery tank. A liquid discharge pipe, a ventilation valve and a liquid level sensor are arranged on the desalted water recovery tank. A stop valve is arranged on the liquid discharge pipe.

[0011] Preferably, the central axis of the body and the central axis of the stirring shaft installed on the body are on the same axis. A discharge pipe is provided at one end of the body. A number of guide rings are evenly arranged on the inner wall of the body along the direction from near the discharge pipe to far from the discharge pipe. The inner diameter of each guide ring gradually decreases first and then gradually increases along the direction from near the discharge pipe to far from the discharge pipe. The central axis of the guide ring and the central axis of the body are on the same axis.

[0012] The beneficial effects of the present utility model are as follows: First, during the processing of the cold-patch asphalt liquid, the vaporized parts of the additive, anti-stripping agent, and diluent are liquefied again and then conveyed back into the asphalt in the stirring state in the body, thereby reducing the evaporation rate of the additive, anti-stripping agent, and diluent, and enabling the cold-patch asphalt liquid to reach the preset ratio.

[0013] Second, for each of the gas-phase conveying pipes of the present utility model, a second regulating valve and a first pressure sensor are sequentially arranged along the direction from near the first heat exchanger to far from the first heat exchanger; installing the first pressure sensor facilitates the feedback of pressure parameters.

[0014] Third, for each of the high-pressure steam conveying branch pipes of the present utility model, a third regulating valve and a second pressure sensor are sequentially arranged along the direction from near the high-pressure steam conveying main pipe to far from the high-pressure steam conveying main pipe; installing the second pressure sensor facilitates the feedback of pressure parameters.

[0015] The present utility model has a simple structure, convenient operation, ingenious design, greatly improves work efficiency, has good social and economic benefits, and is a product that is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model.

[0017] Figure 2 is Figure 1 a partially enlarged schematic view of Detail A. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Such as Figures 1 to 2As shown in the figure, a processing device for cold patch asphalt mixture includes a mixing and stirring machine. The mixing and stirring machine includes a machine body 1. A first jacket 2 is arranged on the outer side of the machine body 1. An auxiliary agent mixing tank 3 is arranged above the machine body 1. A second jacket 4 is arranged on the outer side of the auxiliary agent mixing tank 3. Stirring devices are respectively arranged on the machine body 1 and the auxiliary agent mixing tank 3. The stirring device includes a stirring shaft 5, stirring blades 6 arranged on the stirring shaft 5, and a stirring motor 7 drivingly connected to the stirring shaft 5. The stirring motor 7 in the stirring device installed on the machine body 1 is a three-phase asynchronous motor. A first heat exchanger 8 is arranged above the auxiliary agent mixing tank 3. The inlet ends between the machine body 1 and the inlet end of the heat source channel of the first heat exchanger 8 and between the inlet end of the heat source channel of the first heat exchanger 8 and the auxiliary agent mixing tank 3 are respectively connected and communicated through a gas-phase conveying pipe 9. The outlet end of the heat source channel of the first heat exchanger 8 is connected and communicated with the auxiliary agent mixing tank 3. The auxiliary agent mixing tank 3 and the machine body 1 are connected and communicated through an auxiliary agent conveying pipe 10. A first regulating valve 11 is arranged on the auxiliary agent conveying pipe 10. The inlet end of a U-shaped liquid seal pipe 16 is connected and communicated with the outlet end of the heat source channel of the first heat exchanger 8. The outlet end of the U-shaped liquid seal pipe 16 is connected and communicated with the top of the auxiliary agent mixing tank 3.

[0019] Each of the gas-phase conveying pipes 9 is respectively and sequentially provided with a second regulating valve 14 and a first pressure sensor 15 along the direction from near the first heat exchanger 8 to far from the first heat exchanger 8. The central axis of the machine body 1 and the central axis of the stirring shaft 5 installed on the machine body 1 are located on the same axis. A discharge pipe 27 is arranged at one end of the machine body 1. A flap butterfly valve is arranged on the discharge pipe 27. A plurality of guide rings 28 are uniformly arranged on the inner wall of the machine body 1 along the direction from near the discharge pipe 27 to far from the discharge pipe 27. The inner diameter of each guide ring 28 gradually decreases first and then gradually increases along the direction from near the discharge pipe 27 to far from the discharge pipe 27. Installing the guide rings 28 facilitates guiding the medium in the machine body 1, so as to prompt the medium to move towards the central axis direction of the machine body 1 under the action of the guide rings 28. The central axis of the guide ring 28 and the central axis of the machine body 1 are located on the same axis.

[0020] A support 12 is arranged on the outer side of the auxiliary agent mixing tank 3. The auxiliary agent mixing tank 3 is movably installed on the support 12. A weight sensor 13 is arranged between the support 12 and the auxiliary agent mixing tank 3. The number of the weight sensors 13 is several. The several weight sensors 13 are evenly distributed in a star shape on the outer side of the central axis of the auxiliary agent mixing tank 3. Installing several weight sensors 13 facilitates feedback of the weight parameters of the auxiliary agent mixing tank 3.

[0021] The product also includes a high-pressure steam delivery main pipe 17. The inlet end of the first jacket 2 and the high-pressure steam delivery main pipe 17, as well as the inlet end of the high-pressure steam delivery main pipe 17 and the inlet end of the second jacket 4, are respectively connected and communicated through high-pressure steam delivery branch pipes 18. Each high-pressure steam delivery branch pipe 18 is successively provided with a third regulating valve 19 and a second pressure sensor 20 along the direction from near the high-pressure steam delivery main pipe 17 to far from the high-pressure steam delivery main pipe 17. Installing the second pressure sensor 20 is convenient for feeding back the pressure parameters of the steam medium conveyed by the corresponding high-pressure steam delivery branch pipe 18.

[0022] The product also includes a second heat exchanger 21. The outlet end of the first jacket 2 and the outlet end of the second jacket 4 are both connected and communicated with the inlet end of the heat source channel of the second heat exchanger 21. A desalted water recovery tank 22 is connected to the outlet end of the heat source channel of the second heat exchanger 21. A liquid discharge pipe 23, a ventilation valve 24, and a liquid level sensor 25 are provided on the desalted water recovery tank 22, and a stop valve 26 is provided on the liquid discharge pipe 23. The ventilation valve 24 is located at the top of the desalted water recovery tank 22, and the liquid discharge pipe 23 is located at the bottom of the desalted water recovery tank 22. Thus, it realizes heat exchange between the gas-liquid mixture formed by partial liquefaction of the steam conveyed from the first jacket 2 and / or the second jacket 4 to the heat source channel of the second heat exchanger 21 and the medium continuously conveyed to the cold source channel of the second heat exchanger 21, realizes the complete liquefaction and condensation of the gas-liquid mixture for recovery and conveyance to the desalted water recovery tank 22 for temporary storage, and installing the liquid level sensor 25 on the desalted water recovery tank 22 is convenient for feeding back the liquid level parameters in the desalted water recovery tank 22.

[0023] The additives described in this case include heavy oil, solvent oil, tackifier, reinforcing agent, and surfactant; the solvent oil is one of C 1 to C 10 aromatic solvent oil; the tackifier is one of coumarone resin and C 5 aromatic petroleum resin or a mixture of the two in any proportion; the reinforcing agent is wood cellulose; the surfactant is fatty alcohol polyoxyethylene ether or octadecyl trimethyl ammonium chloride. The anti-stripping agent is PA-1 type anti-stripping agent. The diluent is 0# diesel, -35# diesel, or aviation kerosene. The asphalt is 70# road petroleum asphalt or 90# road petroleum asphalt.

[0024] The usage method of this product is as follows, as Figures 1 to 2 shown, including the following steps:

[0025] S1. First, add the diluent into the additive mixing tank 3 until the weight sensor 13 on the additive mixing tank 3 reaches the first preset range. After starting the stirring device on the additive mixing tank 3, then add each of the various additives into the additive mixing tank 3 one by one and feed back the weight through the weight sensor 13. Finally, add the anti-stripping agent into the additive mixing tank 3 and feed back the weight through the weight sensor 13.

[0026] S2. Add the granular asphalt into the machine body 1 and start the stirring device on the machine body 1. Then, the high-pressure steam delivery main pipe 17 receives the high-pressure steam transported from upstream and then transports it to the first jacket 2 and the second jacket 4 respectively through the corresponding high-pressure steam delivery branch pipes 18. Then, the high-pressure steam transported in the first jacket 2 exchanges heat with the asphalt in the inner cavity of the machine body 1. While the asphalt in the inner cavity of the machine body 1 receives heat and warms up and gradually softens, the high-pressure steam transported in the second jacket 4 exchanges heat with the medium in the additive mixing tank 3 in a stirring state, and a relatively uniform mixture is formed in the additive mixing tank 3.

[0027] S3. When the heating of the asphalt in the inner cavity of the machine body 1 and the mixture in the additive mixing tank 3 both reach the preset time; open the first regulating valve 11, and the mixture in the additive mixing tank 3 is evenly transported to the asphalt in the inner cavity of the machine body 1 in a stirring state. During this period, the opening of the first regulating valve 11 should be adjusted according to the value fed back by the weight sensor 13. When the asphalt in the inner cavity of the machine body 1 in a stirring state is processed to the preset time, the supply of high-pressure steam to the first jacket 2 should be stopped in a timely manner. At this time, the temperature of the asphalt in the inner cavity of the machine body 1 in a stirring state is gradually reduced. After the mixture in the additive mixing tank 3 is transported completely, close the first regulating valve 11 and the second regulating valve 14 on the machine body 1 that communicates with the gas-phase delivery pipe 9. Finally, the medium in the inner cavity of the machine body 1 is gradually cooled, and the value fed back by the first pressure sensor 15 on the machine body 1 that communicates with the gas-phase delivery pipe 9 also gradually becomes smaller. When the value fed back by the first pressure sensor 15 on the machine body 1 that communicates with the gas-phase delivery pipe 9 reaches the preset range, discharge the processed cold patch asphalt through the discharge pipe 27, and then the cold patch asphalt forms a cold patch asphalt mixture that can be used for paving after being mixed with the aggregate.

[0028] In step S2 and step S3, the first jacket 2 and the second jacket 4 continuously transport the high-pressure steam that has completed heat exchange to the heat source channel of the second heat exchanger 21. This high-pressure steam has been partially liquefied but still has part in a gaseous state. After this part of the high-pressure steam exchanges heat countercurrently with the medium continuously transported to the heat source channel of the second heat exchanger 21, it is completely liquefied and is transported to the desalted water recovery tank 22 through the outlet end of the heat source channel of the second heat exchanger 21 for temporary storage for later use.

[0029] In steps S2 and S3, a part of the mixture heated and in a stirred state in the auxiliary agent mixing tank 3 will be vaporized and transported through the gas-phase delivery pipe 9 connected to the auxiliary agent mixing tank 3 to the heat source channel of the first heat exchanger 8, and after countercurrent heat exchange with the medium continuously transported to the cold source channel of the first heat exchanger 8, it is liquefied again and sent back to the auxiliary agent mixing tank 3 through the U-shaped liquid seal pipe 16; and since the mixture in the gradually mixing tank 3 is gradually added to the asphalt in the stirred state in the machine body 1; the volatile medium generated in the machine body 1 gradually increases, and in this stage, the asphalt in the stirred state in the machine body 1 is in a state of being modified, and part of the mixture will still be vaporized, and thus is transported through the corresponding gas-phase delivery pipe 9 to the heat source channel of the first heat exchanger 8 and after countercurrent heat exchange with the medium continuously transported to the cold source channel of the first heat exchanger 8, it is liquefied again and sent back to the auxiliary agent mixing tank 3 through the U-shaped liquid seal pipe 16, and is sent back to the auxiliary agent mixing tank 3 to be mixed with the mixture in the stirred state in the auxiliary agent mixing tank 3. During this period, the mixture in the stirred state in the auxiliary agent mixing tank 3 is continuously heated by the high-pressure steam continuously transported in the second jacket 4. The purpose of this is to: reduce the influence of the too low temperature of the condensate reflux liquid continuously transported out from the outlet end of the heat source channel of the first heat exchanger 8 on the temperature of the asphalt in the stirred state in the machine body 1 being modified.

[0030] Through this embodiment, during the processing of the cold-patch asphalt liquid, the vaporized parts of the additive, anti-stripping agent, and diluent are liquefied again and transported back into the asphalt in the stirred state in the machine body 1, thereby reducing the escape rate of the additive, anti-stripping agent, and diluent, and enabling the cold-patch asphalt liquid to reach the preset ratio.

[0031] The above-described embodiments are only the preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, all equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present invention patent should be included within the scope of the patent application of the present invention.

Claims

1. A cold patch asphalt mixture processing device, comprising a mixer, the mixer comprising a body (1), characterized in that: The machine body (1) is provided with a first jacket (2) on the outside, an auxiliary agent mixing tank (3) is provided above the machine body (1), a second jacket (4) is provided on the outside of the auxiliary agent mixing tank (3), and a stirring device is provided on the machine body (1) and the auxiliary agent mixing tank (3), respectively, wherein the stirring device comprises a stirring shaft (5), a stirring blade (6) provided on the stirring shaft (5), and a stirring motor (7) connected to the stirring shaft (5); a first jacket (2) is provided above the auxiliary agent mixing tank (3); The heat exchanger (8), the machine body (1) and the inlet end of the heat source channel of the first heat exchanger (8), and the inlet end of the heat source channel of the first heat exchanger (8) and the auxiliary agent mixing tank (3) are respectively connected via a gas phase delivery pipe (9); the outlet end of the heat source channel of the first heat exchanger (8) and the auxiliary agent mixing tank (3) are connected; the auxiliary agent mixing tank (3) and the machine body (1) are connected via an auxiliary agent delivery pipe (10); and a first regulating valve (11) is provided on the auxiliary agent delivery pipe (10).

2. The cold patch asphalt mixture processing device according to claim 1 is characterized in that: A bracket (12) is arranged outside the additive mixing tank (3), and a weight sensor (13) is arranged between the bracket (12) and the additive mixing tank (3). The weight sensors (13) are arranged in a plurality and are evenly distributed in a star shape outside the central axis of the additive mixing tank (3).

3. The cold patch asphalt mixture processing device according to claim 1, characterized in that: Each of the gas phase transport pipes (9) is provided with a second regulating valve (14) and a first pressure sensor (15) in sequence along a direction from close to the first heat exchanger (8) to far away from the first heat exchanger (8).

4. The cold patch asphalt mixture processing device according to claim 1, characterized in that: The outlet end of the heat source channel of the first heat exchanger (8) is connected to the inlet end of the U-shaped liquid seal tube (16), and the outlet end of the U-shaped liquid seal tube (16) is connected to the top of the auxiliary agent mixing tank (3).

5. The cold patch asphalt mixture processing device according to claim 1, characterized in that: The invention also comprises a high-pressure steam delivery main pipe (17), wherein the inlet end of the first jacket (2) and the high-pressure steam delivery main pipe (17) as well as the high-pressure steam delivery main pipe (17) and the inlet end of the second jacket (4) are respectively connected via high-pressure steam delivery branch pipes (18), and each high-pressure steam delivery branch pipe (18) is respectively provided with a third regulating valve (19) and a second pressure sensor (20) in sequence along a direction from close to the high-pressure steam delivery main pipe (17) to far away from the high-pressure steam delivery main pipe (17).

6. The cold patch asphalt mixture processing device according to claim 1, characterized in that: The system further comprises a second heat exchanger (21), wherein the outlet end of the first jacket (2) and the outlet end of the second jacket (4) are both connected to the inlet end of the heat source channel of the second heat exchanger (21), the outlet end of the heat source channel of the second heat exchanger (21) is connected to a desalted water recovery tank (22), the desalted water recovery tank (22) is provided with a drain pipe (23), a ventilation valve (24) and a liquid level sensor (25), and the drain pipe (23) is provided with a stop valve (26).

7. The cold patch asphalt mixture processing device according to claim 1, characterized in that: The central axis of the machine body (1) and the central axis of the stirring shaft (5) installed on the machine body (1) are located on the same axis. A discharge pipe (27) is provided on one end of the machine body (1). A plurality of guide rings (28) are evenly provided on the inner wall of the machine body (1) along a direction from close to the discharge pipe (27) to far away from the discharge pipe (27). The inner diameter of each guide ring (28) gradually decreases and then gradually increases along a direction from close to the discharge pipe (27) to far away from the discharge pipe (27). The central axis of the guide ring (28) and the central axis of the machine body (1) are located on the same axis.

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