Asphalt heating device for asphalt pavement construction

Abstract

The utility model discloses an asphalt heating device for asphalt pavement construction, including asphalt pavement heating plate and its on installation's liquefied petroleum gas tank buffer placement structure. The buffer placement structure is by cylindrical pedestal, cylindrical cover, tank body limiting ring and connecting support column constitutes main body frame. Its core improvement lies in: cylindrical cover and cylindrical pedestal are connected through the compound damping structure of damper and helical spring between, and are supplemented with guide rod and guide ring and ensure the stability of vertical movement. The damping coefficient of damper is preferably 2800-3200 N.s / m, and the stiffness coefficient of helical spring is preferably 180-220 N / mm. In addition, the cylindrical cover upper surface and the tank body limiting ring inner wall are respectively provided with rubber pad and buffer rubber ring of specific hardness. The utility model can effectively attenuate the impact and vibration in the construction movement, realize the multidimensional buffer protection of liquefied petroleum gas tank, and improve the safety of equipment and the service life of gas tank.

Description

Technical Field

[0001] This utility model relates to the technical field of asphalt pavement construction equipment, specifically an asphalt heating device for asphalt pavement construction. Background Technology

[0002] Asphalt pavement heating plates are key equipment in asphalt pavement construction and maintenance. They are mainly used to locally heat old asphalt pavements to soften them, facilitating operations such as loosening, recycling, repair, or joint treatment. These devices typically use liquefied petroleum gas (LPG) as fuel, generating a high-temperature flame or thermal radiation through a burner to achieve uniform heating of the pavement. Therefore, an LPG tank is an indispensable component of the device, usually mounted directly on the heating plate itself.

[0003] In existing technologies, a common method for accommodating liquefied petroleum gas (LPG) tanks is to weld a simple ring-shaped support made of steel bars or pipes onto the top of the asphalt road heating plate. While this support provides basic restraint and prevents the tank from easily slipping, it has significant drawbacks. Because the support is a rigid connection structure, it lacks an effective buffer or shock absorption mechanism. During equipment movement or transport, especially on uneven construction surfaces, impacts and vibrations from the ground are directly transmitted to the LPG tank through the heating plate. This continuous rigid impact not only easily damages the anti-corrosion coating on the tank surface, causing rust and shortening the tank's lifespan, but also poses certain safety hazards, potentially causing loosening or damage to tank valves and pipelines, increasing the risk of leakage.

[0004] Therefore, we propose an asphalt heating device for asphalt pavement construction. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides an asphalt heating device for asphalt pavement construction. By setting a buffer placement structure integrating a spring damping structure and flexible protective components on the asphalt heating plate, it can effectively attenuate and absorb the impact and vibration during operation and movement, thereby achieving multi-dimensional and efficient protection for liquefied petroleum gas tanks, improving the safety of the equipment and the service life of the tank, and effectively solving the problems in the background technology.

[0006] (II) Technical Solution To achieve the above objectives, the technical solution adopted by this utility model is as follows: an asphalt heating device for asphalt pavement construction, comprising an asphalt pavement heating plate, wherein a liquefied petroleum gas tank buffer placement structure is fixedly installed at the rear end of the upper outer surface of the asphalt pavement heating plate, the liquefied petroleum gas tank buffer placement structure comprising a cylindrical base, a cylindrical cover, a rubber pad, a tank body limiting ring, a support column, a buffer rubber ring, a damper, a helical spring, a guide ring, and a guide rod, wherein the cylindrical base is fixed at the rear end of the upper outer surface of the asphalt pavement heating plate, the cylindrical cover is provided on the upper part of the cylindrical base, and an annular gap is left between the inner wall of the cylindrical cover and the outer wall of the cylindrical base, and an installation groove is provided on the upper outer surface of the cylindrical base.

[0007] Preferably, there are two sets of guide rings and guide rods. The two sets of guide rods are fixed on the left and right sides of the upper part of the inner cavity of the cylindrical cover, and the two sets of guide rings are fixed on the upper part of the left and right sides of the mounting groove. The guide rods pass through the guide rings, and the outer wall of the guide rods is slidably connected to the inner wall of the guide rings.

[0008] Preferably, the damper is fixed between the middle of the lower end of the mounting groove and the middle of the upper end of the cylindrical cover cavity, the helical spring is movably sleeved on the outside of the damper, and the helical spring is fixed between the bottom of the mounting groove and the middle of the upper end of the cylindrical cover cavity.

[0009] Preferably, the rubber pad is bonded to the upper outer surface of the cylindrical cover, and the buffer rubber ring is bonded to the inner wall of the tank body limiting ring.

[0010] Preferably, the number of support columns is four sets, and the four sets of support columns are fixedly connected in a ring array between the edge of the upper outer surface of the cylindrical cover and the lower outer surface of the tank body limiting ring.

[0011] Preferably, the damping coefficient of the damper ranges from 2800 N·s / m to 3200 N·s / m; the stiffness coefficient of the helical spring ranges from 180 N / mm to 220 N / mm; and the Shore hardness of the rubber pad and the buffer rubber ring are both from 60 HA to 70 HA.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides an asphalt heating device for asphalt pavement construction, which has the following beneficial effects: 1. This asphalt heating device for asphalt pavement construction, through a composite shock absorption structure consisting of a damper and a helical spring, can effectively absorb and attenuate the multi-directional impacts and vibrations generated by the asphalt pavement heating plate during movement and operation. When the equipment encounters bumps, the impact force is transmitted through the cylindrical base, and the helical spring provides elastic buffering. At the same time, the damper quickly converts the mechanical energy into heat energy and dissipates it, effectively suppressing the reciprocating oscillation of the spring and avoiding the direct transmission of rigid impact to the liquefied petroleum gas tank, thereby improving the stability and safety of the gas tank during transportation and use.

[0013] 2. This asphalt heating device for asphalt pavement construction, by setting a rubber pad on the upper outer surface and bonding a buffer rubber ring to the inner wall of the tank body limiting ring, forms a flexible contact interface with the bottom and side walls of the liquefied petroleum gas tank. This not only avoids scratches and wear on the anti-corrosion layer of the tank surface by the rigid support and reduces the risk of corrosion of the tank due to physical damage, but also further isolates high-frequency vibrations, complementing the core damping-spring system, and realizing three-dimensional and all-round protection for the bottom and side walls of the gas tank. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an asphalt heating device for asphalt pavement construction according to the present invention.

[0015] Figure 2 This is a schematic diagram of the buffer placement structure of the liquefied petroleum gas tank in an asphalt heating device for asphalt pavement construction according to this utility model.

[0016] Figure 3 This is a partial structural diagram of the buffer placement structure of the liquefied petroleum gas tank in an asphalt heating device for asphalt pavement construction according to the present invention.

[0017] Figure 4 This is a partial side cross-sectional view of the buffer placement structure of the liquefied petroleum gas tank in an asphalt heating device for asphalt pavement construction according to this utility model.

[0018] In the diagram: 1. Asphalt pavement heating plate; 2. Buffer placement structure for liquefied petroleum gas tank; 3. Cylindrical base; 4. Cylindrical cover; 5. Rubber pad; 6. Tank body limiting ring; 7. Support column; 8. Buffer rubber ring; 9. Annular gap; 10. Mounting groove; 11. Damper; 12. Helical spring; 13. Guide ring; 14. Guide rod. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] like Figure 1-4As shown, this utility model provides an asphalt heating device for asphalt pavement construction, including an asphalt pavement heating plate 1. The asphalt pavement heating plate 1 is a conventional structure in this field, used for heating the pavement. Its specific working principle and structure will not be described in detail here. A liquefied petroleum gas tank buffer placement structure 2 is fixedly installed at the rear end of the upper outer surface of the asphalt pavement heating plate 1.

[0021] The buffer placement structure 2 of the liquefied petroleum gas tank is the core of this utility model. It is mainly composed of a cylindrical base 3, a cylindrical cover 4, a rubber pad 5, a tank body limiting ring 6, a support column 7, a buffer rubber ring 8, a damper 11, a helical spring 12, a guide ring 13, and a guide rod 14.

[0022] The cylindrical base 3 is securely fixed to the rear end of the upper outer surface of the asphalt pavement heating plate 1 by welding. A cylindrical cover 4 is fitted over the cylindrical base 3, with an annular gap 9 between the inner wall of the cylindrical cover 4 and the outer wall of the cylindrical base 3. This annular gap 9 ensures that the internal and external air pressures of the cylindrical cover 4 are balanced during its up-and-down movement, preventing negative or positive pressure from hindering its smooth movement and making the buffering process smoother. An installation groove 10 is provided on the upper outer surface of the cylindrical base 3.

[0023] To ensure the cylindrical cover 4 moves smoothly in the vertical direction during the buffering process and prevents skewing or jamming, a guide assembly is provided. Specifically, there are two sets of guide rings 13 and guide rods 14. The two sets of guide rods 14 are vertically fixed to the left and right sides of the upper part of the inner cavity of the cylindrical cover 4. The two sets of guide rings 13 are vertically fixed to the upper part of the left and right sides of the inner wall of the mounting groove 10 by welding or other methods. The guide rods 14 pass through the corresponding guide rings 13, and the outer wall of the guide rod 14 is slidably connected to the inner wall of the guide ring 13. This allows the guide rods 14 to slide freely up and down relative to the guide rings 13, thus providing precise guidance for the raising and lowering of the cylindrical cover 4.

[0024] The damper 11 and the coil spring 12 constitute the core buffer and shock absorption system. The bottom end of the damper 11 is fixed to the middle of the lower end of the mounting groove 10, and its top end is fixed to the middle of the upper end of the inner cavity of the cylindrical cover 4; the coil spring 12 is movably sleeved on the outside of the damper 11, with its bottom end fixed to the bottom of the mounting groove 10 and its top end fixed to the middle of the upper end of the inner cavity of the cylindrical cover 4.

[0025] In this embodiment, the key parameters of the damper 11 and the coil spring 12 were optimized: The damping coefficient of damper 11 ranges from 2800 N·s / m to 3200 N·s / m. This range is chosen to achieve optimal matching with the stiffness of the coil spring 12. A damping coefficient that is too small will result in insufficient dissipation of impact energy, potentially causing continuous shaking of the air tank; a damping coefficient that is too large will make the buffer system too "rigid," weakening the buffering effect. Within this preferred range, damper 11 can quickly convert and dissipate impact kinetic energy into heat energy, effectively suppressing excessive oscillations generated after the coil spring 12 is compressed or rebounds, allowing the air tank to quickly return to stability.

[0026] The stiffness coefficient of the helical spring 12 ranges from 180 N / mm to 220 N / mm. This stiffness range ensures that the cushioning system can provide sufficient support for a standard fully loaded liquefied petroleum gas tank (typically weighing 30-50 kg) to prevent the spring from being over-compressed to its limit, while also producing moderate elastic deformation under common road impacts to effectively absorb impact energy.

[0027] To provide comprehensive flexible protection, rubber components are installed at key contact points. Rubber pads 5 are bonded to the upper outer surface of the cylindrical cover 4 with a high-strength adhesive, directly supporting the bottom of the liquefied petroleum gas tank. Buffer rubber rings 8 are bonded to the inner wall of the tank body limiting ring 6 with a high-strength adhesive, constraining and protecting the side walls of the liquefied petroleum gas tank.

[0028] Both the rubber pad 5 and the buffer rubber ring 8 have a Shore hardness of 60HA to 70HA. Choosing rubber materials within this hardness range provides excellent elasticity and cushioning performance while ensuring sufficient support strength. This effectively prevents hard scratches or wear on the anti-corrosion coating of the liquefied petroleum gas tank surface, and also isolates some high-frequency vibrations, effectively complementing the core spring damping system.

[0029] The tank body limiting ring 6 is used to surround and restrict the position of the liquefied petroleum gas tank from the side. There are four sets of support columns 7, which are arranged in a ring array and fixedly connected by welding between the edge of the upper outer surface of the cylindrical cover 4 and the lower outer surface of the tank body limiting ring 6, thereby firmly supporting the tank body limiting ring 6 above the cylindrical cover 4.

[0030] Working Principle: During use, the liquefied petroleum gas (LPG) tank is placed above the tank body limiting ring 6, with its bottom surface resting on the rubber pad 5 at the upper end of the cylindrical cover 4. The tank body is surrounded by the tank body limiting ring 6 and the buffer rubber ring 8 on its inner wall. When the equipment encounters bumps or vibrations during movement or operation, the impact force is transmitted through the asphalt pavement heating plate 1 and the cylindrical base 3. At this time, the helical spring 12 first undergoes elastic deformation, absorbing most of the impact energy; simultaneously, the damper 11 quickly acts, converting mechanical energy into heat energy and dissipating it, effectively suppressing the reciprocating oscillation of the helical spring 12 and causing the vibration to decay rapidly. During this process, the cylindrical cover 4 drives the guide rod 14 to slide smoothly up and down along the guide ring 13, ensuring the stability of the entire buffering process. The rubber pad 5 and the buffer rubber ring 8 act as the final flexible contact barrier, further isolating residual vibrations and preventing damage to the surface of the gas tank from rigid components.

[0031] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An asphalt heating device for asphalt pavement construction, comprising an asphalt pavement heating plate (1), characterized in that: A liquefied petroleum gas tank buffer placement structure (2) is fixedly installed at the rear end of the upper outer surface of the asphalt road heating plate (1). The liquefied petroleum gas tank buffer placement structure (2) includes a cylindrical base (3), a cylindrical cover (4), a rubber pad (5), a tank body limiting ring (6), a support column (7), a buffer rubber ring (8), a damper (11), a helical spring (12), a guide ring (13), and a guide rod (14). The cylindrical base (3) is fixed at the rear end of the upper outer surface of the asphalt road heating plate (1). The cylindrical cover (4) covers the upper part of the cylindrical base (3), and there is an annular gap (9) between the inner wall of the cylindrical cover (4) and the outer wall of the cylindrical base (3). An installation groove (10) is opened on the upper outer surface of the cylindrical base (3).

2. The asphalt heating device for asphalt pavement construction according to claim 1, characterized in that: The number of guide rings (13) and guide rods (14) are both two sets. The two sets of guide rods (14) are fixed on the left and right sides of the upper part of the inner cavity of the cylindrical cover (4). The two sets of guide rings (13) are fixed on the upper part of the left and right sides of the mounting groove (10). The guide rods (14) pass through the guide rings (13), and the outer wall of the guide rods (14) and the inner wall of the guide rings (13) are slidably connected.

3. The asphalt heating device for asphalt pavement construction according to claim 2, characterized in that: The damper (11) is fixed between the middle of the lower end of the mounting groove (10) and the middle of the upper end of the inner cavity of the cylindrical cover (4). The helical spring (12) is movably sleeved on the outside of the damper (11) and is fixed between the bottom of the mounting groove (10) and the middle of the upper end of the inner cavity of the cylindrical cover (4).

4. The asphalt heating device for asphalt pavement construction according to claim 3, characterized in that: The rubber pad (5) is bonded to the upper outer surface of the cylindrical cover (4), and the buffer rubber ring (8) is bonded to the inner wall of the tank body limiting ring (6).

5. An asphalt heating device for asphalt pavement construction according to claim 4, characterized in that: The number of the support columns (7) is four sets, and the four sets of support columns (7) are fixedly connected in a ring array between the edge of the upper outer surface of the cylindrical cover (4) and the lower outer surface of the tank body limiting ring (6).

6. The asphalt heating device for asphalt pavement construction according to claim 5, characterized in that: The damping coefficient of the damper (11) ranges from 2800 N·s / m to 3200 N·s / m; the stiffness coefficient of the helical spring (12) ranges from 180 N / mm to 220 N / mm; and the Shore hardness of the rubber pad (5) and the buffer rubber ring (8) is 60 HA to 70 HA.

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