Drying cylinder for asphalt mixing

Abstract

The utility model relates to the technical field of asphalt production, and provides an asphalt mixing drying cylinder which comprises a cylinder body, a combustor, a mounting frame, a natural gas pipe, an air pipe and an air blower. The mounting frame is mounted at one end of the barrel; the combustor is mounted on the mounting frame, is communicated with the barrel body and is used for combusting and heating the aggregate in the barrel body; the natural gas pipe is connected with the combustor and is externally connected to natural gas storage equipment; the air pipe is connected with the combustor; and the air blower is connected with the air pipe and is used for supplying air. The device has the effect of stabilizing the combustion ratio of air to natural gas.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of asphalt production, in particular to a drying cylinder for asphalt mixing. BACKGROUND

[0002] During road construction of asphalt macadam mixture, construction materials need to be processed at any time, and the moisture of the aggregate needs to be dried and the aggregate needs to be heated to a certain temperature during processing of the construction materials, so a drying cylinder for drying macadam is generally used.

[0003] The drying cylinder dries the moisture of the aggregate required for asphalt pavement construction and heats the aggregate to the specified temperature for construction by using the flame and hot gas generated by the burner, thereby realizing processing and treatment of the construction materials.

[0004] The drying cylinder mainly uses a natural gas burner, and when the natural gas in the natural gas burner burns as fuel, a mechanical damper controller is used to control the flow of natural gas and air, but the general mechanical hand damper controller is expensive, and is prone to failure under high temperature and dust for a long time, resulting in an uncoordinated ratio of the air intake and the natural gas intake, so that the consumption of natural gas is high or low, affecting the production efficiency. SUMMARY

[0005] In order to improve the above problems, the application provides a drying cylinder for asphalt mixing.

[0006] The drying cylinder for asphalt mixing provided by the application adopts the following technical scheme:

[0007] A drying cylinder for asphalt mixing, comprising a cylinder body, a burner, a mounting frame, a natural gas pipe, an air pipe and a blower; the mounting frame is mounted at one end of the cylinder body; the burner is mounted on the mounting frame and communicates with the cylinder body to provide combustion heating for the aggregate in the cylinder body; the natural gas pipe is connected with the burner and externally connected with a natural gas storage device; the air pipe is connected with the burner; the blower is connected with the air pipe to provide air supplement.

[0008] By using the above technical scheme, the natural gas pipe delivers natural gas to the burner, the air pipe delivers air to the burner, and the burner uses the mixture of air and natural gas as fuel to burn and dry and heat the aggregate in the cylinder body. In order to keep the air intake stable and avoid the change of the ratio of air and natural gas, a blower is connected to the air pipe to provide continuous and stable air flow supply, reduce the change of air intake, stabilize the ratio of air and natural gas, and improve the production efficiency.

[0009] Optionally, the blower is provided with a frequency converter.

[0010] By adopting the above technical solution, the frequency converter can change or adjust the output frequency of the blower to change the air intake according to the needs and adapt to different amounts of aggregate.

[0011] Optionally, the natural gas pipeline is equipped with a natural gas valve, and the air pipeline is equipped with an air valve, with the switches of the natural gas valve and the air valve located on the same side.

[0012] By adopting the above technical solutions, the natural gas valve and air valve can adjust the gas flow rate of the natural gas pipe or air pipe per unit time, thereby further facilitating the control of the ratio of natural gas or air during combustion.

[0013] Optionally, a proportional adjustment mechanism is provided between the natural gas valve and the air valve, and the proportional adjustment mechanism connects the on / off state of the natural gas valve and the air valve.

[0014] By adopting the above technical solution, the proportional control mechanism is used to adjust the intake volume of natural gas and air through the natural gas valve and the air valve.

[0015] Optionally, the proportional adjustment mechanism includes a first gear, a second gear, and a drive unit; the first gear and the second gear have different size ratios, the first gear is connected to the switch of the natural gas valve; the second gear is connected to the switch of the air valve, and the first gear and the second gear mesh; the drive unit is mounted on the mounting bracket and connected to either gear.

[0016] By adopting the above technical solution, and utilizing the different size ratios of the first gear and the second gear, when the first gear or the second gear is driven by the drive unit, it can achieve synchronous and stable adjustment of a fixed ratio of natural gas and air intake by using different opening ratios of the air valve and the natural gas valve.

[0017] Optionally, the drive unit includes a drive motor and a third gear; the third gear is connected to the drive end of the drive motor and meshes with the first gear or the second gear; the size of the third gear is smaller than that of the first gear and the second gear; the drive motor is located on the mounting bracket and drives the third gear to rotate.

[0018] By adopting the above technical solution, the third gear drives the first or second gear to rotate. The size of the third gear is smaller than that of the first or second gear, so that when the drive motor drives the third gear to rotate, it needs to rotate several times to drive the first or second gear to the appropriate position, making the adjustment effect more precise.

[0019] Optionally, the third gear is detachably connected to the drive end of the drive motor, allowing for the replacement of the third gear with different sizes.

[0020] By adopting the above technical solution and using a detachable connection, the third gear that meets the requirements can be replaced with the drive motor, so that the drive motor can be more accurately adjusted when driving the third gear to rotate, and it is also easy to replace it when it wears out.

[0021] Optionally, the frequency converter is electrically connected to the drive unit.

[0022] By adopting the above technical solution, the frequency converter can adjust the output power of the blower by transmitting signals or commands through electrical connections according to the drive speed of the drive unit, so as to adjust the air intake volume per unit time and further provide more precise control of the air intake ratio of natural gas and air.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The natural gas pipeline delivers natural gas to the burner, and the air pipeline delivers air to the burner. The burner uses a mixture of air and natural gas as fuel for combustion to dry and heat the aggregate inside the cylinder. In order to keep the air intake stable and avoid changes in the air-to-natural gas ratio, a blower is connected to the air pipeline. The blower provides a continuous and stable airflow supply, reduces changes in the air intake, and stabilizes the air-to-natural gas ratio to improve production efficiency.

[0025] 2. The frequency converter can change or adjust the output frequency of the blower to change the air intake according to the needs and adapt to different amounts of aggregate.

[0026] 3. The natural gas valve and air valve can adjust the gas flow rate of the natural gas pipe or air pipe per unit time, thereby further facilitating the control of the ratio of natural gas or air during combustion;

[0027] 4. The proportional control mechanism is used to adjust the intake volume of natural gas and air through the natural gas valve and the air valve. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural schematic diagram of the drying cylinder in one embodiment of this application;

[0029] Figure 2 This is a side view of the natural gas pipe and air pipe in some embodiments of this application;

[0030] The labels in the attached diagram are as follows: 1. Cylinder, 2. Burner, 3. Mounting bracket, 4. Natural gas pipe, 41. Natural gas valve, 5. Air pipe, 51. Air valve, 6. Blower, 61. Frequency converter, 7. Proportional adjustment mechanism, 71. First gear, 72. Second gear, 73. Drive unit, 731. Drive motor, 732. Third gear. Detailed Implementation

[0031] The following specific examples illustrate the implementation methods of this application. Those skilled in the art can easily understand other advantages and effects of this application from the information disclosed herein. This application can also be implemented or applied through other different specific embodiments, and various details in this application can be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0032] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the application. This application may be embodied in many different forms and is not limited to the embodiments described herein.

[0033] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0034] Furthermore, the terms "first" and "second" are used only to indicate an objective and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0036] The following is in conjunction with the appendix Figure 1 -Appendix Figure 2 This application will be described in further detail below.

[0037] This application discloses a drying drum for asphalt mixing.

[0038] A drying drum for asphalt mixing is mainly used for drying and heating the aggregates in asphalt-aggregate mixtures.

[0039] refer to Figure 1 As shown, it includes a cylinder 1, a burner 2, a mounting bracket 3, a natural gas pipe 4, an air pipe 5, and a blower 6. The cylinder 1 is a space for storing and heating aggregates, and its surface has an inlet and an outlet. Aggregates enter the cylinder 1 through the inlet, which is equipped with a closing cover. The mounting bracket 3 is installed at one end of the cylinder 1, specifically at the end away from the inlet. The mounting bracket 3 is used to provide support and installation for the burner 2.

[0040] The burner 2 is mounted on the mounting bracket 3 and is connected to the cylinder 1. The burner 2 provides a combustion space for drying. Fuel is delivered to the burner 2 and burned inside the burner 2. Heat is transferred to the aggregate, which is calcined at high temperature to dry the moisture and heat it, thus providing combustion heating for the aggregate inside the cylinder 1.

[0041] Natural gas pipe 4 is connected to burner 2 and externally connected to natural gas storage equipment. Natural gas pipe 4 is mainly used to transport natural gas from the external natural gas storage equipment to burner 2. Natural gas is the main fuel for combustion in burner 2. During combustion, natural gas needs to be mixed with air to ensure complete combustion and reduce energy loss.

[0042] Air pipe 5 is connected to burner 2 and is used to transport air. Blower 6 is connected to air pipe 5 and provides air supplement. Blower 6 can transport external air to burner 2 through air pipe 5. Using the driving effect of blower 6, the airflow is driven into burner 2, so that the air entering burner 2 is stably transported, reducing the fluctuating air intake and balancing the intake of natural gas and air.

[0043] Natural gas pipe 4 and air pipe 5 have the same diameter.

[0044] Furthermore, the blower 6 is equipped with a frequency converter 61, which can change or adjust the output frequency of the blower 6. The frequency converter 61 can be electrically connected to an external controller or backend. Using the external controller or backend, the frequency can be set. When there is too much or too little aggregate, the output power of the blower 6 can be reduced by the frequency converter 61, thereby adjusting the air intake volume to change the air intake volume according to the demand and adapt to different amounts of aggregate.

[0045] In some embodiments, reference Figure 1As shown, the natural gas pipe 4 is equipped with a natural gas valve 41, and the air pipe 5 is equipped with an air valve 51. The switches of the natural gas valve 41 and the air valve 51 are located on the same side. Both the natural gas valve 41 and the air valve 51 can be regulating valves. The regulating valves can adjust the gas flow rate of the natural gas pipe 4 or the air pipe 5 per unit time, thereby further facilitating the control of the ratio of natural gas or air during combustion.

[0046] When the switches for natural gas valve 41 and air valve 51 are both located on the same side, it is easier to control both valves.

[0047] In some embodiments, a proportional adjustment mechanism 7 is provided between the natural gas valve 41 and the air valve 51. The proportional adjustment mechanism 7 connects the on / off switches of the natural gas valve 41 and the air valve 51. The proportional adjustment mechanism 7 is used to adjust the intake volume of natural gas and air through the natural gas valve 41 and the air valve 51. The proportional adjustment mechanism 7 connects the natural gas valve 41 and the air valve 51 synchronously, so that when adjusting any valve, the other valve can be adjusted simultaneously, thereby achieving the effect of accurately adjusting the intake volume ratio.

[0048] Furthermore, the proportional adjustment mechanism 7 includes a first gear 71, a second gear 72, and a drive unit 73; the first gear 71 and the second gear 72 have different size ratios and different numbers of teeth, so that the rotational speed and rotational radius of the first gear 71 and the second gear 72 are different. The first gear 71 is connected to the switch of the natural gas valve 41, and the second gear 72 is connected to the switch of the air valve 51. The first gear 71 and the second gear 72 mesh, so that when the first gear 71 rotates, it can drive the second gear 72 to rotate.

[0049] However, the first gear 71 and the second gear 72 are different in size and number of teeth. Therefore, when the first gear 71 rotates once, it can drive the second gear 72 to rotate several times or less than once. The specific number of rotations depends on the specific gear ratio and number of teeth, which is not limited here. This can adjust the opening degree of the natural gas valve 41 and the air valve 51. Therefore, the size ratio and number of teeth of the first gear 71 and the second gear 72 need to be determined according to the required opening degree of the natural gas pipe 4 and the air pipe 5.

[0050] For example, the drive unit 73 drives the first gear 71 to rotate a quarter turn, and the first gear 71 drives the second gear 72 to rotate. If the size of the second gear 72 is smaller than that of the first gear 71, the second gear 72 will rotate half a turn, so that the air intake of the natural gas pipe 4 and the air pipe 5 is 1:2 under a fixed pressure per unit time. Taking this as an example, the degree of adjustment and the adjustment ratio are fixed, which improves the stability of the air intake ratio.

[0051] In the diagram, the natural gas valve 41 on the natural gas pipe 4 is covered by the first gear 71 and is therefore not shown.

[0052] Specifically, by utilizing the different size ratios of the first gear 71 and the second gear 72, when the first gear 71 or the second gear 72 is driven by the drive unit 73, the air valve 51 and the natural gas valve 41 can be opened at different ratios to achieve synchronous and stable adjustment of the intake volume of natural gas and air at a fixed ratio.

[0053] The connection between the first gear 71 and the natural gas valve 41, and the connection between the second gear 72 and the air valve 51, are all detachable, such as snap-fit, so that the first gear 71 and the second gear 72 can be easily replaced, so as to switch gears of different sizes and numbers of teeth to adapt to different adjustment ratios.

[0054] In addition to being regulated by the natural gas valve 41 and the air valve 51, the air intake of the natural gas pipe 4 and the air pipe 5 can also be regulated by the air pressure. When the air volume is still low after the natural gas pipe 4 and the air pipe 5 are fully opened, the air intake can be increased by the output power of the blower 6. The greater the output power of the blower 6, the faster the airflow and the greater the air pressure. The more air passes through the air pipe 5 per unit time, so the blower 6 can also accelerate the airflow to regulate the ventilation volume.

[0055] When the distance between the natural gas pipe 4 and the air pipe 5 is relatively far, a chain can be installed between the first gear 71 and the second gear 72 for connection.

[0056] The drive unit 73 is mounted on the end of the mounting bracket 3 away from the burner 2 to prevent the high temperature of the burner 2 from affecting the drive unit 73, and the mounting bracket 3 provides heat insulation.

[0057] Furthermore, refer to Figure 2 As shown, the drive unit 73 includes a drive motor 731 and a third gear 732. The third gear 732 is connected to the drive end of the drive motor 731 and meshes with the first gear 71 or the second gear 72. The drive motor 731 is located on the mounting bracket 3 and drives the third gear 732 to rotate. The third gear 732 drives the first gear 71 or the second gear 72 to rotate. The size of the third gear 732 is smaller than that of the first gear 71 or the second gear 72, and the density of the number of teeth is simultaneously greater than that of the first gear 71 and the second gear 72. Therefore, when the drive motor 731 drives the third gear 732 to rotate, it needs to rotate several times to drive the first gear 71 or the second gear 72 to the appropriate position, so that the adjustment effect is more precise.

[0058] The third gear 732 is detachably connected to the drive end of the drive motor 731, which is used to replace the third gear 732 with different sizes and numbers of teeth. By using the detachable connection, the third gear 732 that meets the requirements can be replaced to the drive motor 731, so that the drive motor 731 can be adjusted more accurately when driving the third gear 732 to rotate, and it is also convenient to replace it when it is worn.

[0059] The proportional adjustment mechanism 7 is also equipped with a dust cover (not shown in the figure) to isolate external dust and reduce the impact of external dust or gravel on the first gear 71, the second gear 72 or the third gear 732.

[0060] Furthermore, the frequency converter 61 of the blower 6 is electrically connected to the drive unit 73. The electrical connection can be a circuit connection or an electrical signal connection. The frequency converter 61 can adjust the output power of the blower 6 by transmitting signals or commands through the electrical connection according to the drive speed of the drive unit 73. For example, according to the ratio of natural gas to air intake, after the drive unit 73 drives the natural gas valve 41 and the air valve 51 to open to a certain extent, it sends an electrical signal to the frequency converter 61 through the electrical connection. The frequency converter 61 controls the blower 6 to increase or decrease the output power, thereby changing the air pressure and the air flow speed to adjust the air intake volume per unit time, and further providing more precise control of the ratio of natural gas to air intake.

[0061] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drying drum for asphalt mixing, characterized in that, The system includes a cylinder (1), a burner (2), a mounting bracket (3), a natural gas pipe (4), an air pipe (5), and a blower (6). The mounting bracket (3) is installed at one end of the cylinder (1). The burner (2) is installed on the mounting bracket (3) and communicates with the cylinder (1) to provide combustion heating for the aggregate inside the cylinder (1). The natural gas pipe (4) is connected to the burner (2) and externally connected to a natural gas storage device. The air pipe (5) is connected to the burner (2). The blower (6) is connected to the air pipe (5) to provide air supply. The natural gas pipe (4) is equipped with a natural gas valve (41), and the air pipe (5) is equipped with an air valve (51). The natural gas valve (41) and the air valve (51) are connected. The switches are all located on the same side; a proportional adjustment mechanism (7) is provided between the natural gas valve (41) and the air valve (51), and the proportional adjustment mechanism (7) connects the switches of the natural gas valve (41) and the air valve (51) to each other; the proportional adjustment mechanism (7) includes a first gear (71), a second gear (72) and a drive unit (73); the first gear (71) and the second gear (72) have different size ratios, the first gear (71) is connected to the switch of the natural gas valve (41); the second gear (72) is connected to the switch of the air valve (51), and the first gear (71) and the second gear (72) mesh; the drive unit (73) is mounted on the mounting bracket (3) and connected to any of the gears.

2. The drying drum for asphalt mixing according to claim 1, characterized in that, The blower (6) is equipped with a frequency converter (61).

3. The drying drum for asphalt mixing according to claim 2, characterized in that, The drive unit (73) includes a drive motor (731) and a third gear (732); the third gear (732) is connected to the drive end of the drive motor (731) and meshes with the first gear (71) or the second gear (72); the size of the third gear (732) is smaller than that of the first gear (71) and the second gear (72); the drive motor (731) is located on the mounting bracket (3) and drives the third gear (732) to rotate.

4. A drying drum for asphalt mixing according to claim 3, characterized in that, The third gear (732) is detachably connected to the drive end of the drive motor (731) for replacing the third gear (732) of different sizes.

5. A drying drum for asphalt mixing according to any one of claims 2-4, characterized in that, The frequency converter (61) is electrically connected to the drive unit (73).

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