Continuous foamed asphalt plant mixing equipment

Abstract

The utility model discloses continuous foamed asphalt plant mixing equipment which comprises a mixing pot, an asphalt foaming mechanism is arranged at the position, close to a feeding port, of the upper end face of the mixing pot, the asphalt foaming mechanism comprises a foaming cavity, and a cold water input pipe is arranged on one side face of the foaming cavity. The part, located outside the foaming cavity, of the cold water input pipe is provided with a cooling mechanism used for cooling the cold water input pipe, the cooling mechanism comprises a box body, the part, located outside the foaming cavity, of the cold water input pipe penetrates through the box body, and a cooling assembly used for cooling is arranged in the box body. The cooling mechanisms used for cooling the cold water input pipe are arranged on the outer side faces of the cold water input pipe respectively, and the temperature of the cooling cavity can be adjusted through operation of the semiconductor chilling plates, so that the temperature of the cold water input pipe is adjusted, and the influence of high temperature of the foaming cavity on the cold water input pipe is reduced; the influence of the high temperature of the foaming cavity on the to-be-input cold water is reduced, so that the temperature of the cold water entering the foaming cavity is consistent with that of the asphalt.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt production equipment, in particular to continuous foam asphalt mixing equipment. Background Art

[0002] Continuous foamed asphalt mixing equipment, such as the mixing method of recycled mixture using foamed asphalt disclosed in publication number CN113877458B, includes a mixing pot, an aggregate feeding mechanism, a stirring mechanism and an asphalt foaming mechanism, wherein the water supply port of the foaming chamber in the asphalt foaming mechanism is connected to a quantitative water supply system, and 15-30°C cold water is quantitatively supplied to the foaming chamber, and the cold water encounters the high-temperature asphalt gasification to produce bubbles. A nozzle is provided on the nozzle connected to the foaming chamber, and the foamed asphalt is uniformly sprayed out from the nozzle. The stirring temperature in the mixing pot is 135-155°C.

[0003] Evaluation index of asphalt foaming characteristics In order to measure the foaming effect of asphalt, the expansion rate (foaming volume multiple) and half-life are currently mainly used for evaluation. The expansion rate refers to the ratio of the maximum volume of asphalt in the foaming state to the volume of asphalt when it is not foamed. Since the volume of foamed asphalt previously sprayed during the spraying process has begun to decay, the measured maximum foaming volume is smaller than the actual maximum value. In order to make the foamed asphalt fully contact with the aggregate and form a good wrapping effect, the greater the expansion rate, the better the quality of the foamed asphalt cold recycled mixture. The half-life is the time taken for the foamed asphalt to decay from the maximum volume to 50% of the maximum volume. This index actually describes the stability of asphalt foam. The longer the half-life, the less likely the foam is to decay, and it can have a longer contact and mixing with the aggregate to improve the quality of the foamed asphalt cold recycled mixture.

[0004] Among them, the test shows that the expansion rate and half-life of asphalt foaming are directly related to the temperature of asphalt and cold water. That is to say, in order to maintain a stable and optimal expansion rate and half-life of asphalt foaming, it is necessary to strictly control the temperature of asphalt and cold water when they are input into the foaming chamber to reduce the temperature difference of asphalt or cold water during continuous operation. However, the existing continuous foamed asphalt mixing equipment often does not pay attention to this key point, which can easily lead to differences in the produced foamed asphalt and reduce the quality of subsequent pavement construction. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a continuous foamed asphalt mixing plant to solve the technical problems raised in the background technology.

[0006] The utility model provides the following technical solutions:

[0007] A continuous foamed asphalt mixing plant comprises a mixing pot, an asphalt foaming mechanism is arranged on the upper end surface of the mixing pot near the feed inlet, the asphalt foaming mechanism comprises a foaming chamber, a cold water input pipe is arranged on one side of the foaming chamber, a cooling mechanism for cooling the cold water input pipe is arranged on the portion of the cold water input pipe located outside the foaming chamber, the cooling mechanism comprises a box body, the portion of the cold water input pipe located outside the foaming chamber passes through the box body, and a cooling component for cooling is arranged inside the box body.

[0008] Preferably, the length direction of the foaming cavity is arranged along the width direction of the mixing pot, and a plurality of nozzles are arranged in sequence at equal intervals on the lower end surface of the foaming cavity along the length direction thereof.

[0009] Preferably, the interior of the box body is provided with a first partition and a second partition respectively on the front and rear sides of the cold water inlet pipe, a cooling chamber is formed between the side surfaces of the first partition and the second partition close to each other and the inner wall of the box body, the cold water inlet pipe passes through the cooling chamber, and the cooling components are respectively arranged on the first partition and the second partition.

[0010] Preferably, the cooling component comprises a semiconductor refrigeration plate, and the cold end surface of the semiconductor refrigeration plate is located in the cooling chamber.

[0011] Preferably, heat dissipation cavities are formed between the side surfaces of the first partition and the second partition that are away from each other and the inner wall of the box body, and the hot end surface of the semiconductor refrigeration plate is located in the heat dissipation cavity.

[0012] Preferably, a plurality of the cold water inlet pipes are provided, and the plurality of the cold water inlet pipes are arranged in sequence at equal intervals along the length direction of the foaming cavity, one end of the plurality of the cold water inlet pipes are connected to the foaming cavity, and the other ends of the plurality of the cold water inlet pipes are commonly connected to a cold water inlet main pipe, and the input end of the cold water inlet main pipe is connected to a water tank through a diaphragm pump.

[0013] Preferably, a semiconductor refrigeration plate is provided on the first partition at the front side of each of the cold water inlet pipes, and a semiconductor refrigeration plate is also provided on the second partition at the rear side of each of the cold water inlet pipes.

[0014] Preferably, a plurality of asphalt input pipes are arranged at equal intervals in sequence on the rear side of the foaming cavity along its length direction, one end of a plurality of the asphalt input pipes are connected to the foaming cavity, and the other ends of a plurality of the asphalt input pipes are commonly connected to an asphalt input main pipe, and the number of the asphalt input pipes is the same as the number of the cold water input pipes, and are arranged in a one-to-one correspondence.

[0015] Preferably, the right side of the box body is respectively provided with exhaust ports at the positions of the two heat dissipation cavities, an exhaust fan is provided inside the heat dissipation cavity near the exhaust ports, and the left side of the box body is respectively provided with air inlets at the positions of the two heat dissipation cavities.

[0016] Preferably, a first filter is provided in the exhaust port, and a second filter is provided in the air inlet.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model discloses a continuous foamed asphalt mixing plant, wherein cooling mechanisms for cooling the cold water inlet pipe are respectively arranged on the outer side surfaces of the cold water inlet pipe, and the temperature of the cooling chamber can be regulated through the operation of semiconductor refrigeration sheets, thereby achieving temperature regulation of the cold water inlet pipe, reducing the influence of the high temperature of the foaming chamber on the cold water inlet pipe, and further reducing the influence of the high temperature of the foaming chamber on the cold water to be input, so that the temperature of the cold water when entering the foaming chamber and contacting the asphalt tends to be consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the utility model when connected with a paving vehicle.

[0021] Figure 2 For this utility model Figure 1 Schematic diagram of the cross-section at AA.

[0022] Figure 3 For this utility model Figure 2 A partial enlarged schematic diagram of point B. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-3 As shown, the continuous foamed asphalt mixing plant equipment includes a mixing pot, an asphalt foaming mechanism is arranged on the upper end surface of the mixing pot near the feed inlet, the asphalt foaming mechanism includes a foaming chamber 1, a cold water input pipe 2 is arranged on one side of the foaming chamber 1, a cooling mechanism 4 for cooling the cold water input pipe 2 is arranged on the part of the cold water input pipe 2 located outside the foaming chamber 1, the cooling mechanism 4 includes a box body 41, the part of the cold water input pipe 2 located outside the foaming chamber 1 is arranged through the box body 41, and a cooling component for cooling is arranged inside the box body 41. The high temperature continuously entering the foaming chamber will cause the outer wall of the foaming chamber to generate high temperature, and the high temperature will be transmitted to the cold water inlet pipe 2 connected thereto. The temperature change of the cold water inlet pipe 2 will increase the temperature of the cold water passing through, causing the temperature of the cold water entering the foaming chamber to be uncontrollable, making it difficult to maintain a stable and optimal state for the expansion rate and half-life of asphalt foaming. The utility model provides cooling mechanisms for cooling the cold water inlet pipe on the outer side surfaces of the cold water inlet pipe, and the temperature of the cooling chamber can be regulated through the operation of the semiconductor refrigeration sheet, thereby achieving temperature regulation of the cold water inlet pipe, reducing the influence of the high temperature of the foaming chamber on the cold water inlet pipe, and further reducing the influence of the high temperature of the foaming chamber on the cold water to be input, so that the temperature of the cold water entering the foaming chamber and contacting the asphalt tends to be consistent, so that the expansion rate and half-life of the asphalt foaming are maintained in a stable and optimal state.

[0026] The length direction of the foaming chamber 1 is arranged along the width direction of the mixing pot, and a plurality of nozzles 7 are arranged in sequence at equal intervals on the lower end surface of the foaming chamber 1 along the length direction thereof.

[0027] The interior of the box body 41 is provided with a first partition 42 and a second partition 43 on both sides of the front and rear of the cold water inlet pipe 2, respectively. A cooling chamber 44 is formed between the side surfaces of the first partition 42 and the second partition 43 close to each other and the inner wall of the box body 41. The cold water inlet pipe 2 passes through the cooling chamber 44, and the cooling components are respectively arranged on the first partition 42 and the second partition 43.

[0028] The cooling component includes a semiconductor cooling plate 46 , and a cold end surface of the semiconductor cooling plate 46 is located in the cooling cavity 44 .

[0029] A temperature sensor 10 is provided on the inner wall of the box 41 in the cooling chamber 44 to detect the temperature inside the cooling chamber and transmit the parameter to the processor, which adaptively adjusts the power of the semiconductor cooling plate 46 according to the temperature change to keep the cooling chamber at a certain temperature.

[0030] A heat dissipation cavity 45 is formed between the side surfaces of the first partition plate 42 and the second partition plate 43 that are away from each other and the inner wall of the box body 41 , and the hot end surface of the semiconductor cooling plate 46 is located in the heat dissipation cavity 45 .

[0031] There are a plurality of cold water inlet pipes 2, which are arranged at equal intervals in sequence along the length direction of the foaming chamber 1. One end of the plurality of cold water inlet pipes 2 is connected to the foaming chamber 1, and the other ends of the plurality of cold water inlet pipes 2 are commonly connected to a cold water inlet main pipe 3, and the input end of the cold water inlet main pipe 3 is connected to a water tank through a diaphragm pump. A semiconductor cooling sheet 46 is arranged on the front side of each cold water inlet pipe 2 on the first partition 42, and a semiconductor cooling sheet 46 is also arranged on the rear side of each cold water inlet pipe 2 on the second partition 43.

[0032] The rear side of the foaming chamber 1 is provided with a plurality of asphalt input pipes 5 at equal intervals in sequence along its length direction. One end of the plurality of asphalt input pipes 5 is connected to the foaming chamber 1, and the other ends of the plurality of asphalt input pipes 5 are commonly connected to an asphalt input main pipe 6. The number of the asphalt input pipes 5 is the same as the number of the cold water input pipes 2, and they are provided one by one. One asphalt input pipe 5 is located below one cold water input pipe 2. The provision of the plurality of asphalt input pipes 5 can better enable the high-temperature asphalt to fully contact with the cold water in the plurality of cold water input pipes 2, thereby improving the uniformity of asphalt foaming.

[0033] The right side of the box body 41 is provided with exhaust ports 47 at the positions of the two heat dissipation chambers 45, and an exhaust fan 48 is provided inside the heat dissipation chamber 45 near the exhaust ports 47. The left side of the box body 41 is provided with air inlets at the positions of the two heat dissipation chambers 45. The exhaust fan 48 is connected to the inner wall of the box body 41 through a connecting frame 9.

[0034] A first filter screen 49 is disposed in the exhaust port 47 , and a second filter screen 8 is disposed in the air inlet.

[0035] The above is only a preferred implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A continuous foamed asphalt mixing plant, comprising a mixing pot, wherein an asphalt foaming mechanism is arranged on the upper end surface of the mixing pot near the feed inlet, and characterized in that: The asphalt foaming mechanism comprises a foaming chamber (1), a cold water inlet pipe (2) is arranged on one side of the foaming chamber (1), a cooling mechanism (4) for cooling the cold water inlet pipe (2) is arranged at a portion of the cold water inlet pipe (2) located outside the foaming chamber (1), the cooling mechanism (4) comprises a box body (41), a portion of the cold water inlet pipe (2) located outside the foaming chamber (1) passes through the box body (41), and a cooling component for cooling is arranged inside the box body (41).

2. The continuous foamed asphalt mixing plant according to claim 1, characterized in that: A first partition (42) and a second partition (43) are respectively arranged on the front and rear sides of the cold water inlet pipe (2) inside the box body (41); a cooling chamber (44) is formed between the side surfaces of the first partition (42) and the second partition (43) close to each other and the inner wall of the box body (41); the cold water inlet pipe (2) passes through the cooling chamber (44); and the cooling components are respectively arranged on the first partition (42) and the second partition (43).

3. The continuous foamed asphalt mixing plant according to claim 2, characterized in that: The cooling component comprises a semiconductor cooling sheet (46), and a cold end surface of the semiconductor cooling sheet (46) is located in the cooling cavity (44).

4. The continuous foamed asphalt mixing plant according to claim 3, characterized in that: A heat dissipation cavity (45) is formed between the side surfaces of the first partition plate (42) and the second partition plate (43) that are away from each other and the inner wall of the box body (41), and the hot end surface of the semiconductor cooling plate (46) is located in the heat dissipation cavity (45).

5. The continuous foamed asphalt mixing plant according to claim 4, characterized in that: A plurality of the cold water input pipes (2) are provided, and the plurality of the cold water input pipes (2) are arranged in sequence at equal intervals along the length direction of the foaming chamber (1); one end of the plurality of the cold water input pipes (2) is connected to the foaming chamber (1); the other ends of the plurality of the cold water input pipes (2) are commonly connected to a cold water input main pipe (3); and the input end of the cold water input main pipe (3) is connected to a water tank via a diaphragm pump.

6. The continuous foamed asphalt mixing plant according to claim 5, characterized in that: A semiconductor refrigeration plate (46) is provided on the first partition plate (42) at the front side of each of the cold water inlet pipes (2), and a semiconductor refrigeration plate (46) is also provided on the second partition plate (43) at the rear side of each of the cold water inlet pipes (2).

7. The continuous foamed asphalt mixing plant according to claim 6, characterized in that: The lower end surface of the foaming chamber (1) is provided with a plurality of nozzles (7) at equal intervals in sequence along its length direction.

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