Asphalt metering and conveying device for highway construction

Abstract

The invention discloses an asphalt metering and conveying device for expressway construction, and relates to the technical field of asphalt conveying, the asphalt metering and conveying device comprises a tank body, a lifting ring and a scraping plate are arranged in the tank body, and the lifting ring is attached to the inner wall of the tank body and can ascend and descend along the tank body; the scraper is located at the bottom of the lifting ring and used for scraping asphalt on the inner wall of the tank body. According to the asphalt metering and conveying device for expressway construction, when asphalt in the tank body is too much, the lifting ring drives the scraping plate to move to the top of the tank body, when the asphalt in the tank body is gradually reduced along with conveying, the lifting ring drives the scraping plate to descend in the tank body, and therefore the asphalt attached to the inner wall of the tank body is scraped away through the scraping plate; the lifting ring ascends and descends along with the storage amount of asphalt in the tank body, the asphalt is prevented from being attached to the lifting ring and the scraper as much as possible, and the influence of residual asphalt in the tank body on metering of the whole conveying system is avoided as much as possible.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt transportation, and in particular to an asphalt metering and transportation device for highway construction. Background Art

[0002] Asphalt is a common adhesive material, widely used in construction projects such as highways. The physical and chemical properties of asphalt make it have different fluidity under different temperature conditions. Therefore, in the process of asphalt transportation, reasonable metering and transportation process can ensure the quality and efficiency of asphalt construction.

[0003] For example, the patent document entitled "A Asphalt Metering Device" with the authorization announcement number CN220380600U and the authorization announcement date January 23, 2024, includes a storage tank, a feed pipe is embedded and fixed on the top surface of the storage tank, a high-temperature tank is installed in the second panel, an asphalt pump is installed on the top surface of the second base, and a third connecting pipe and a fourth connecting pipe are embedded and fixed on the first connecting pipe, and the third connecting pipe and the fourth connecting pipe are connected through a mass flow meter. This patent solves the metering problem during asphalt transportation, facilitates later maintenance and overhaul, and the metering is more intuitive and convenient to operate.

[0004] In the prior art, asphalt is generally stored in tanks. During the asphalt transportation process, the asphalt in the tank gradually decreases. Since asphalt has a certain viscosity, a large amount of asphalt will adhere to the inner wall of the tank. Obviously, the asphalt adhered to the inner wall of the tank will affect the metering of the overall transportation system. Summary of the invention

[0005] The purpose of the present invention is to provide an asphalt metering and conveying device for highway construction to solve the above-mentioned shortcomings in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: An asphalt metering and conveying device for highway construction comprises a tank body, wherein the tank body is provided with: A lifting ring, which is attached to the inner wall of the tank and can be lifted and lowered along the tank; The scraper is located at the bottom of the lifting ring and is used to scrape asphalt off the inner wall of the tank.

[0007] In the above-mentioned asphalt metering and conveying device for highway construction, the tank body is connected with a conveying pipe, a fluid pump and a metering mechanism.

[0008] In the above-mentioned asphalt metering and conveying device for highway construction, a plurality of annular parts are constructed on the lifting ring, and friction rings are rotatably connected to the plurality of annular parts.

[0009] In the above-mentioned asphalt metering and conveying device for highway construction, annular grooves are constructed on the lifting ring and multiple annular parts, a swivel is slidably connected in the annular groove, a plurality of cylindrical parts are evenly fixed on the swivel along its circumference, and a plurality of spiral grooves are constructed on the inner wall of the friction ring.

[0010] In the above-mentioned asphalt metering and conveying device for highway construction, the lifting ring is rotatably connected to a first transmission wheel, and the rotating ring is constructed with a first transmission part.

[0011] In the above-mentioned asphalt metering and conveying device for highway construction, a first connecting ring is fixed to the bottom of the lifting ring, a second connecting ring is rotatably connected to the bottom of the first connecting ring, and a plurality of scrapers are fixed to the second connecting ring.

[0012] In the above-mentioned asphalt metering and conveying device for highway construction, the scraper is constructed in an arc shape.

[0013] In the above-mentioned asphalt metering and conveying device for highway construction, a second transmission wheel is coaxially fixed on the first transmission wheel, and a second transmission part is constructed on the second connecting ring.

[0014] In the above-mentioned asphalt metering and conveying device for highway construction, a brake rod is slidably connected to the lifting ring, and the brake rod extends into the annular groove.

[0015] In the above-mentioned asphalt metering and conveying device for highway construction, the end of the brake rod is provided with a friction part.

[0016] In the above technical scheme, the present invention provides an asphalt metering and conveying device for highway construction. When there is a lot of asphalt in the tank, the scraper is driven to move to the top of the tank through the lifting ring. When the asphalt in the tank gradually decreases during the transportation, the scraper is driven to descend in the tank through the lifting ring, so that the asphalt attached to the inner wall of the tank can be scraped off by the scraper; the lifting ring is raised and lowered according to the amount of asphalt in the tank, so as to avoid asphalt adhering to the lifting ring and the scraper, and to avoid residual asphalt in the tank to affect the metering of the overall conveying system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 A schematic diagram of a lifting ring structure provided in yet another embodiment of the present invention; Figure 3 A schematic diagram of the friction ring structure provided by yet another embodiment of the present invention; Figure 4 A schematic diagram of a scraper structure provided by another embodiment of the present invention; Figure 5 A schematic diagram of the structure of a second transmission wheel provided in another embodiment of the present invention; Figure 6 A schematic diagram of a hemispherical structure provided by another embodiment of the present invention; Figure 7 A schematic diagram of a top view structure provided for another embodiment of the present invention; Figure 8 This is a schematic diagram of the brake rod structure provided by yet another embodiment of the present invention.

[0019] Description of reference numerals: 1. Tank body; 2. Lifting ring; 3. Scraper; 4. Delivery pipe; 5. Fluid pump; 6. Measuring mechanism; 7. Circular ring; 8. Friction ring; 9. Annular groove; 10. Rotating ring; 11. Cylindrical part; 12. Spiral groove; 13. Slide groove; 14. Arc-shaped slider; 15. First transmission wheel; 16. First transmission part; 17. Rotating shaft; 18. First connecting ring; 19. Second connecting ring; 20. Connecting plate; 21. Second transmission wheel; 22. Second transmission part; 23. Brake rod; 24. Friction part; 25. Hemisphere; 26. Elastic member; 27. Extension part. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Reference Figure 1-8 The embodiment of the present invention provides an asphalt metering and conveying device for highway construction, comprising a tank body 1, wherein a lifting ring 2 and a scraper 3 are arranged inside the tank body 1, wherein the lifting ring 2 is attached to the inner wall of the tank body 1 and can be lifted and lowered along the tank body 1; the scraper 3 is located at the bottom of the lifting ring 2 and is used to scrape off the asphalt on the inner wall of the tank body 1. The tank body 1 is connected with a conveying pipe 4, a fluid pump 5 and a metering mechanism 6.

[0022] Specifically, asphalt is widely used in construction projects such as highways. The physical and chemical properties of asphalt make it have different fluidity under different temperature conditions. In order to improve the fluidity of asphalt, it is generally heated during the transportation of asphalt. In particular, in the tank body 1, a stirring structure and a heating structure are even provided at the same time to make the asphalt in the tank body 1 evenly heated. In the asphalt transportation system, the tank body 1, the delivery pipe 4, the fluid pump 5 and the metering mechanism 6 are used in combination, wherein the delivery pipe 4 is used to input or output asphalt into the tank body 1 (when the lifting ring 2 moves to the top of the tank body 1, the part of the asphalt input into the tank body 1 is heated). The position of the asphalt is lower than the scraper 3, and the contamination of the lifting ring 2 and the scraper 3 structure when inputting asphalt is avoided as much as possible). The fluid pump 5 and the metering mechanism 6 are used to extract the asphalt in the tank body 1 and measure it (the asphalt in the tank body 1 is transported by the fluid pump 5 and the delivery pipe 4 and measured by the metering mechanism 6 is a prior art and will not be described here). Asphalt also has a certain viscosity. When the asphalt in the tank body 1 is transported outward, the asphalt surface in the tank body 1 drops, and a certain amount of asphalt will remain on the inner wall of the tank body 1, which will affect the metering of the overall asphalt transportation system (for example, there is a residual amount of asphalt in the tank body 1 and it cannot be discharged). The above are all prior art and will not be described here. The innovation of the embodiment of the present invention is that a lifting ring 2 and a scraper 3 are arranged in the tank body 1, and the lifting ring 2 is overall constructed in a shape adapted to the inner wall of the tank body 1 (the cross-section of the tank body 1 is generally constructed in a circular shape, and correspondingly, the lifting ring 2 is constructed in a circular ring shape), and a motor and a roller structure can be arranged thereon, so that the lifting ring 2 can fit on the inner wall of the tank body 1 and lift and lower along the inner wall of the tank body 1; the scraper 3 can adopt the annular scraper structure in the prior art, which fits on the inner wall of the tank body 1 so as to clean the asphalt attached to the inner wall of the tank body 1 when the scraper 3 is driven down by the lifting. The advantage of such a configuration is that when there is a lot of asphalt in the tank body 1, the lifting ring 2 drives the scraper 3 to move to the top of the tank body 1, and tries to avoid the scraper 3 and the lifting ring 2 from contacting the asphalt, so that both can be kept as clean as possible (a certain space is left on the top of the tank body 1 without storing asphalt for the lifting ring 2 and the scraper 3 to move); when the asphalt in the tank body 1 is transported outward, the lifting ring 2 drives the scraper 3 to descend to clean the asphalt attached to the inner wall of the tank body 1, and tries to avoid excessive asphalt remaining in the tank body 1 and affecting the metering of the overall transportation system; the lifting ring 2 and the scraper 3 are not driven by other structures outside the lifting ring 2, and tries to avoid the situation where other driving structures set in the tank body 1 are contaminated by asphalt; the lifting ring 2 and the scraper 3 are both constructed in an annular shape, so that a stirring structure can be set along the axis of the tank body 1, and the stirring structure and the scraper 3 structure will not interfere with each other, so that the asphalt in the tank body 1 can be transported while being stirred and heated, and the residual asphalt can be cleaned by the scraper 3 after transportation.

[0023] An embodiment of the present invention provides an asphalt metering and conveying device for highway construction. When there is a lot of asphalt in the tank body 1, the scraper 3 is driven to move to the top of the tank body 1 by the lifting ring 2. When the asphalt in the tank body 1 gradually decreases during transportation, the scraper 3 is driven to descend in the tank body 1 by the lifting ring 2, so that the asphalt attached to the inner wall of the tank body 1 is scraped off by the scraper 3; the lifting ring 2 is raised and lowered according to the asphalt stock in the tank body 1, so as to avoid asphalt adhering to the lifting ring 2 and the scraper 3 as much as possible, and to avoid residual asphalt in the tank body 1 to affect the metering of the overall conveying system.

[0024] In another embodiment provided by the present invention, further, a plurality of annular portions 7 are constructed on the lifting ring 2, and a friction ring 8 is rotatably connected to each of the plurality of annular portions 7. Specifically, the plurality of annular portions 7 are evenly arranged along the circumference of the lifting ring 2, the friction ring 8 is annular as a whole and is rotatably connected to the corresponding annular portion 7, and the outer walls of the plurality of friction rings 8 are tightly in contact with different positions of the inner wall of the tank body 1, so that the lifting ring 2 is stably in the tank body 1 (when the friction ring 8 does not rotate, the friction between the plurality of friction rings 8 and the inner wall of the tank body 1 can make the lifting ring 2 hover in the tank body 1); in this embodiment, a plurality of driving sources can be provided on the lifting ring 2 to drive the plurality of friction rings 8 to rotate synchronously, thereby controlling the lifting ring 2 to rise and fall in the tank body 1.

[0025] As an alternative to providing multiple power sources on the lifting ring 2, preferably, an annular groove 9 is constructed on the lifting ring 2 and the multiple annular portions 7, a swivel ring 10 is slidably connected in the annular groove 9, a plurality of cylindrical portions 11 are evenly fixed on the swivel ring 10 along its circumference, and a plurality of spiral grooves 12 are constructed on the inner wall of the friction ring 8. Specifically, the annular groove 9 is located at the top of the lifting ring 2 and passes through the multiple annular parts 7. The rotating ring 10 and the annular groove 9 are adapted to each other, so that the rotating ring 10 can drive the multiple cylindrical parts 11 to rotate in a circle on the lifting ring 2 (a motor structure can be set on the lifting ring 2 to drive the rotating ring 10 to rotate in the annular groove 9); a plurality of spiral grooves 12 are evenly constructed on the inner wall of the friction ring 8, and the multiple spiral grooves 12 are adapted to the multiple cylindrical parts 11. The outer wall of the annular part 7 is constructed with a slide groove 13, and the inner wall of the friction ring 8 is constructed with a plurality of arc-shaped sliders 14 adapted to the slide groove 13, so that the friction ring 8 is rotatably connected to the annular part 7 through the plurality of arc-shaped sliders 14, and during the rotation of the friction ring 8, the rotating ring 10 can slide along the annular groove 9 in the plurality of friction rings 8; when the rotating ring 10 rotates in the annular groove 9, the multiple cylindrical parts 11 pass through the corresponding friction ring 8 in sequence, and during the process, the multiple cylindrical parts 11 respectively enter different spiral grooves 12 The inner wall of different spiral grooves 12 is resisted (the front cylindrical part 11 first enters a friction ring 8 to force the friction ring 8 to rotate, and then the rear cylindrical part 11 enters an adjacent spiral groove 12 to continue to force the friction ring 8 to rotate), thereby forcing multiple friction rings 8 to rotate on the corresponding annular part 7 (the arc-shaped slider 14 is located between two adjacent spiral grooves 12, and when it slides along the slide groove 13, it does not affect the resistance of the cylindrical part 11 to the inner wall of the spiral groove 12); the advantage of such a setting is that when the rotating ring 10 rotates, multiple friction rings 8 can be forced to rotate synchronously through a plurality of cylindrical parts 11, and the synchronous and unidirectional (unidirectional means that multiple friction rings 8 roll toward one end of the tank body 1 at the same time) rotation of the lifting ring 2 can drive the lifting ring 2 to stably rise and fall along the inner wall of the tank body 1, that is, in this embodiment, only one power source needs to be set on the lifting ring 2 to drive the lifting ring 2 to stably rise and fall in the tank body 1.

[0026] As an alternative to the above-mentioned method of directly driving the rotating ring 10 to rotate by the motor structure, preferably, a first transmission wheel 15 is rotatably connected to the lifting ring 2, and a first transmission part 16 is constructed on the rotating ring 10. Specifically, the inner wall of the lifting ring 2 is rotatably connected with a rotating shaft 17, and the top of the rotating shaft 17 is fixed to the first transmission wheel 15; the first transmission part 16 is annular as a whole and is located on the inner wall of the rotating ring 10 (a space for the first transmission part 16 to rotate is constructed in the annular groove 9 to avoid friction between the first transmission part 16 and the inner wall of the annular groove 9 as much as possible), and the inner wall of the lifting ring 2 is constructed with a window connected to the annular groove 9, so that the first transmission part 16 can be connected to the first transmission part 16 through the window (the transmission connection method can select the gear transmission structure or the friction transmission structure in the prior art, which is not repeated here); in this embodiment, a driving motor can be fixed on the lifting ring 2 to drive the rotating shaft 17 to rotate (this is the prior art, which is not repeated here, and the driving motor is not shown), so that the first transmission wheel 15 and the first transmission part 16 and other structures drive the multiple friction rings 8 to rotate synchronously, thereby driving the lifting ring 2 and the scraper 3 to stably lift and lower in the tank body 1.

[0027] In another embodiment provided by the present invention, further, a first connecting ring 18 is fixed to the bottom of the lifting ring 2, a second connecting ring 19 is rotatably connected to the bottom of the first connecting ring 18, and a plurality of scrapers 3 are fixed to the second connecting ring 19. The scraper 3 is constructed in an arc shape. Specifically, a plurality of connecting plates 20 are fixed to the bottom of the lifting ring 2, the first connecting ring 18 is fixed to the bottom ends of the plurality of connecting plates 20, the first connecting ring 18 and the second connecting ring 19 are both constructed in an annular shape, and the rotational connection between the two can be selected from an annular slide groove structure (such as the annular groove 9 structure mentioned above), which will not be described in detail here; Figure 4 As shown, the scraper 3 is constructed in an arc shape, and multiple scrapers 3 are all in contact with the inner wall of the tank body 1, and multiple scrapers 3 are evenly arranged along the circumference of the second connecting ring 19. The advantage of such a setting is that, in the above embodiment, the scraper 3 can use a scraper structure constructed in an annular shape, which can be lowered with the lifting ring 2 to scrape off the asphalt attached to the inner wall of the tank body 1, while in this embodiment, multiple arc-shaped scrapers 3 are evenly arranged on the second connecting ring 19, when the second connecting ring 19 rotates on the first connecting ring 18 (the driving source for the second connecting ring 19 to rotate on the first connecting ring 18 can use the motor structure in the prior art, which will not be repeated here), multiple scrapers 3 can synchronously rotate relative to the inner wall of the tank body 1, thereby providing a stronger shear force (compared to the direct descent of the scraper 3) to remove the asphalt attached to the inner wall of the tank body 1, so that the efficiency of the scraper 3 in cleaning the asphalt can be effectively improved in coordination with the lifting of the lifting ring 2.

[0028] As an alternative to the above-mentioned motor structure driving the second connecting ring 19 to rotate, preferably, a second transmission wheel 21 is coaxially fixed on the first transmission wheel 15, and a second transmission part 22 is constructed on the second connecting ring 19. Specifically, the second transmission wheel 21 is fixed to the end of the rotating shaft 17 away from the first transmission wheel 15, so that the driving motor can drive the first transmission wheel 15 and the second transmission wheel 21 to rotate synchronously and in the same direction through the rotating shaft 17; the second transmission part 22 is annular as a whole and is located on the inner wall of the second connecting ring 19, and the second transmission wheel 21 is located inside the second transmission part 22 to connect the two in transmission (the transmission connection method can be selected from the gear transmission structure or friction transmission structure in the prior art, which will not be repeated here); the friction between the multiple friction rings 8 and the inner wall of the tank body 1 is relatively large, and when the multiple scrapers 3 rotate relative to the inner wall of the tank body 1 to scrape off the residual asphalt, the circumferential relative position between the lifting ring 2 and the tank body 1 is not affected, that is, the lifting ring 2 and the first connecting ring 18 will not rotate relative to the inner wall of the tank body 1. The advantage of such a configuration is that when the driving motor drives the lifting ring 2 to descend along the inner wall of the tank body 1, it can drive the first connecting ring 18 and the second connecting ring 19 to descend synchronously, and during the descent of the first connecting ring 18, the driving motor can synchronously drive the second connecting ring 19 and multiple scrapers 3 to rotate, so as to drive the scraper 3 to rotate while driving the scraper 3 to descend, thereby improving the efficiency of the scraper 3 in cleaning asphalt.

[0029] In the above embodiment, a distance sensor (such as a liquid level sensor or an infrared sensor, which is the prior art and will not be described in detail and is not shown in the figure) can be provided on the lifting ring 2 to monitor the distance between the asphalt surface in the tank body 1 and the lifting ring 2. When the asphalt surface in the tank body 1 drops (that is, when the asphalt in the tank body 1 is transported outward), the distance between the lifting ring 2 and the asphalt surface increases, and the distance sensor sends an electrical signal to the drive motor to drive the scraper 3 to rotate while driving the lifting ring 2 to drop. When asphalt needs to be input into the tank body 1 or all the asphalt in the tank body 1 is output, the sensor sends an electrical signal to the drive motor (or manually actively controls the operation of the drive motor) to drive the lifting ring 2 and the scraper 3 to reset to the top of the tank body 1 through the drive motor to facilitate the next operation of the device.

[0030] In another embodiment provided by the present invention, as a replacement or parallel solution of the above-mentioned distance sensor, further, a brake rod 23 is slidably connected to the lifting ring 2, and the brake rod 23 extends into the annular groove 9. A friction portion 24 is provided at the end of the brake rod 23. Specifically, the bottom of the lifting ring 2 is configured with a brake groove connected to the annular groove 9, and the brake rod 23 is slidably connected in the brake groove; the friction portion 24 is located at one end of the brake rod 23 close to the annular groove 9, and the friction portion 24 can be made of a rubber pad or other material. When the brake rod 23 extends into the annular groove 9, the friction portion 24 can contact the bottom wall of the rotating ring 10 in the annular groove 9, so that the friction force between the friction portion 24 and the rotating ring 10 forces the rotating ring 10 to stop rotating, thereby stopping the friction ring 8 and the scraper 3 from running; a linear drive structure can be provided on the lifting ring 2 to drive the brake rod 23 to slide in the brake groove. The advantage of such a configuration is that, in the present embodiment, the lifting ring 2 operates based on the height of the asphalt in the tank body 1. When the asphalt in the tank body 1 descends, the asphalt attached to its inner wall will slowly flow downward. At this time, the driving motor can drive the lifting ring 2 to descend and drive the scraper 3 to rotate, so as to clean the asphalt remaining on the inner wall of the tank body 1. When the scraper 3 approaches the asphalt surface, the linear driving structure can drive the brake rod 23 to extend into the annular groove 9, so as to resist the rotating ring 10 through the friction part 24 and force the driving motor to stop running, so as to avoid the lifting ring 2, the scraper 3 and other structures being too close to the asphalt surface.

[0031] Furthermore, it also includes a hemispherical body 25 fixed at the bottom of the brake rod 23, and an elastic member 26 is arranged between the hemispherical body 25 and the lifting ring 2. Specifically, the bottom of the lifting ring 2 is constructed with an extension portion 27, and the brake groove is constructed on the extension portion 27; the top of the hemispherical body 25 is constructed as a hollow structure, and the bottom wall height of the hemispherical body 25 is lower than the height of the scraper 3, that is, during the descent of the lifting ring 2, the hemispherical body 25 first hits the asphalt surface in the tank body 1; the elastic member 26 can be a spring structure in the prior art, and the elastic member 26 is sleeved on the brake rod 23, one end of which is fixed on the end of the extension portion 27, and the other end is fixed on the hemispherical body 25 (fixed on the inner wall of the hollow structure at the top of the hemispherical body 25), so as to force the hemispherical body 25 away from the lifting ring 2 through the elastic member 26, thereby forcing the brake rod 23 away from the lifting ring 2. The advantage of such a configuration is that when the lifting ring 2 drives the scraper 3 to descend to clean the residual asphalt, the hemispherical body 25 will first contact the asphalt surface. Since the top of the hemispherical body 25 is a hollow structure, the asphalt surface has a certain buoyancy on the hemispherical body 25, that is, when the lifting ring 2 descends, the hemispherical body 25 will float on the asphalt surface to support the lifting ring 2 and other structures. At this time, the lifting ring 2 continues to descend and squeezes the elastic member 26, so that the brake rod 23 extends relatively into the annular groove 9 until the scraper 3 is about to release the asphalt surface, and the friction part 24 and the rotating ring 10 conflicts, thereby limiting the rotation of the swivel 10 through the friction part 24, and further limiting the descent of the lifting ring 2; subsequently, when the asphalt in the tank body 1 decreases, the asphalt surface drops, and the buoyancy of the hemispherical body 25 from the asphalt surface is reduced, so that the elastic member 26 can force the hemispherical body 25 and the brake rod 23 to move away from the lifting ring 2, thereby releasing the restriction of the friction part 24 on the swivel 10, allowing the drive motor to continue to run and drive the lifting ring 2 to descend again, and the asphalt attached to the inner wall of the tank body 1 can be continuously cleaned by repeating this process.

[0032] Preferably, a pressure sensor (not shown) is provided between the brake rod 23 and the friction portion 24. When the brake rod 23 extends into the annular groove 9, the pressure between the brake rod 23 and the swivel 10 will be fed back to the pressure sensor through the friction portion 24, so that the pressure sensor sends an electrical signal to the drive motor to stop running (a control panel can be provided between the pressure sensor and the drive motor to control the operation of the drive motor based on the electrical signal of the pressure sensor. This is a prior art and will not be described in detail here); when the brake rod 23 is removed from the annular groove 9, the pressure sensor sends an electrical signal to the drive motor to start running with a delay. The advantage of such a configuration is that when there is more asphalt in the tank body 1, the lifting ring 2 is at the top of the tank body 1, and the hemisphere 25 floats on the asphalt surface. The buoyancy of the asphalt surface on the hemisphere 25 forces the hemisphere 25 to squeeze the elastic member 26 and drive the brake rod 23 to extend into the annular groove 9, so that the electrical signal of the pressure sensor and the friction between the friction part 24 and the rotating ring 10 can synchronously force the drive motor to stop running; when the asphalt in the tank body 1 decreases, the buoyancy of the hemisphere 25 on the asphalt surface decreases, and the brake rod 23 moves away from the annular groove 9, and the friction part 24 is released. The pressure sensor will delay a certain period of time (such as 30 seconds or 1 minute) before sending an operating electrical signal to the drive motor, so that the asphalt attached to the inner wall of the tank body 1 can slide down naturally within a certain period of time, and the amount of asphalt that needs to be scraped by the scraper 3 can be minimized, so that the lifting ring 2 and the scraper 3 can operate adaptively under the electrical signal sent by the pressure sensor; when it is necessary to input asphalt into the tank body 1 or all the asphalt in the tank body 1 is output, the drive motor drives the lifting ring 2 to rise to the top of the tank body 1, and tries to avoid the asphalt input into the tank body 1 from contaminating the lifting ring 2 and other structures.

[0033] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An asphalt metering and conveying device for highway construction, comprising a tank body, characterized in that: The tank body is provided with: A lifting ring, which is attached to the inner wall of the tank and can be lifted and lowered along the tank; The scraper is located at the bottom of the lifting ring and is used to scrape asphalt off the inner wall of the tank.

2. The asphalt metering and conveying device for highway construction according to claim 1, characterized in that: The tank body is connected with a delivery pipe, a fluid pump and a metering mechanism.

3. The asphalt metering and conveying device for highway construction according to claim 1, characterized in that: A plurality of annular parts are constructed on the lifting ring, and friction rings are rotatably connected to the plurality of annular parts.

4. The asphalt metering and conveying device for highway construction according to claim 3 is characterized in that: The lifting ring and the multiple annular parts are formed with annular grooves, a rotating ring is slidably connected in the annular groove, a plurality of cylindrical parts are evenly fixed on the rotating ring along its circumference, and a plurality of spiral grooves are formed on the inner wall of the friction ring.

5. The asphalt metering and conveying device for highway construction according to claim 4, characterized in that: The lifting ring is rotatably connected with a first transmission wheel, and the rotating ring is configured with a first transmission part.

6. The asphalt metering and conveying device for highway construction according to claim 5, characterized in that: A first connecting ring is fixed at the bottom of the lifting ring, a second connecting ring is rotatably connected to the bottom of the first connecting ring, and a plurality of scrapers are fixed on the second connecting ring.

7. The asphalt metering and conveying device for highway construction according to claim 6, characterized in that: The scraper is configured in an arc shape.

8. The asphalt metering and conveying device for highway construction according to claim 6, characterized in that: A second transmission wheel is coaxially fixed on the first transmission wheel, and a second transmission part is configured on the second connecting ring.

9. The asphalt metering and conveying device for highway construction according to claim 4, characterized in that: A brake rod is slidably connected to the lifting ring, and the brake rod extends into the annular groove.

10. The asphalt metering and conveying device for highway construction according to claim 9, characterized in that: The brake rod end is provided with a friction portion.

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