CN212641132U

CN212641132U - Heating device, ironing device and paver

Info

Publication number: CN212641132U
Application number: CN202020928081.2U
Authority: CN
Inventors: 万信超; 艾军
Original assignee: Wuhan Sensor Electronics Co ltd
Current assignee: Wuhan Sensor Electronics Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-03-02
Anticipated expiration: 2030-05-28

Abstract

The application provides heating device, ironing device and paver, one of them heating device includes: the first electric heating layer is arranged inside the rammer knife board and used for heating the rammer knife board; the rammer knife board is used for compacting paved materials and comprises an upper layer of knife board and a lower layer of knife board, and a first electric heating layer is arranged between the upper layer of knife board and the lower layer of knife board. The application also provides an ironing device and a paver. Compared with the prior art, the hole is processed in the rammer cutting board, the heating rod is placed in the hole, the rammer cutting board of the scheme is composed of an upper layer of cutting board and a lower layer of cutting board, the processing is easier, the electric heating layer is laid between the upper layer and the lower layer, and is fully contacted with the upper surface and the lower surface inside the rammer cutting board, the electric heating layer is contacted with the cutting board in the largest area, the cutting board is guaranteed to be heated uniformly, and the heat transfer efficiency is improved.

Description

Heating device, ironing device and paver

Technical Field

The invention relates to the technical field of heating of pavers, in particular to a heating device, an ironing device and a paver.

Background

In the field of engineering machinery, a paver is a road surface machine which is widely applied. The ironing device comprises a rammer knife plate and an ironing bottom plate, the ironing device is arranged at the rear part of the paver and is a main working device of the paver and is responsible for completing compaction and ironing tasks of paving materials, and the paving materials are mainly asphalt mixtures. When the paver is used for paving materials, the bottom plate of the rammer or the ironing bottom plate needs to be preheated before the work is started, so that the bottom plate is not bonded with the paving materials, and the smoothness of a paving layer is ensured.

The existing heating modes of the ironing device include electric heating, gas heating and infrared heating. The electric heating device drives the generator to generate an alternating current or direct current power supply through the engine on the main machine, and the alternating current or direct current power supply is connected to the heating rod of the ironing device to generate heat for heating. In order to achieve good paving effect, the paver must heat the ironing device to about 120 degrees before paving the asphalt.

The rammer knife board of the ironing device is generally made of die steel of a cuboid, a round hole is punched in the die steel of the cuboid, then a square heating rod is arranged in the round hole of the rammer knife board, and the purpose of preheating is achieved by transferring heat of the heating rod to the rammer knife board. Because the heating rod has small direct contact area with the inside of the rammer knife board and the assembly gap is large, the rammer knife board is gradually transmitted to the whole rammer knife board after being locally heated, and the problems of nonuniform heating and long heating time exist, and the working efficiency of the paver is influenced. And the temperature of the heating rod usually exceeds 300 ℃ and then the whole temperature of the rammer knife plate can reach about 120 ℃, the heating rod is easy to damage due to long-time high-temperature electrification, the service life of the heating rod is short, and the maintenance frequency and the maintenance cost of the paver are increased. In addition, the larger the working width of the paver is, the longer the rammer knife plate is, the deeper the punched hole in the rammer knife plate is, and the deeper the hole is, the greater the processing difficulty is.

Disclosure of Invention

In order to solve the above problem, this scheme provides a heating device, includes:

the first electric heating layer is arranged inside the rammer knife board and used for heating the rammer knife board;

the rammer knife board is used for compacting paved materials and comprises an upper layer of knife board and a lower layer of knife board, and a first electric heating layer is arranged between the upper layer of knife board and the lower layer of knife board.

In the scheme, the rammer knife plate can be formed by cutting the rammer knife plate into an upper layer and a lower layer, and compared with the structure that holes are machined in the rammer knife plate, the structure is easier. The electric heating layer is laid between the upper layer and the lower layer and is fully contacted with the upper surface and the lower surface inside the rammer knife board, so that the electric heating layer is contacted with the knife board in the largest area, the knife board is uniformly heated, and the heat transfer efficiency is improved.

Preferably, the first electric heating layer is one of conductive paint, an electric heating film, an electric heating net and an electric heating plate. The conductive coating is laid on the inner surface of the upper layer cutter plate and/or the lower layer cutter plate. Or the electric heating film, the electric heating net and the electric heating plate are clamped between the upper layer cutting plate and the lower layer cutting plate. The surface-to-surface direct contact mode is adopted, the contact area between the heating component and the heated component is maximized, and the heat transfer efficiency is maximized. The electric heating layer has the characteristics of thinness and large surface area, and the thickness of the electric heating layer can be only the thickness of common paper, so that a gap is very small after the electric heating layer and the knife board are clamped, the loss of heat in the air is greatly reduced, and the natural loss of heat is reduced.

Preferably, the electric heating plate is a mica plate.

The mica plates with similar specifications can be set according to the size specifications of the rammer hammer cutter. The mica plate is clamped between the upper layer of cutting board and the lower layer of cutting board, and the assembly is very easy. By the mode of increasing the contact area between the heating part and the heated part, the heated part can be uniformly heated, and the heat transfer efficiency can be improved. In addition, the mica plate has excellent insulating, high temperature resistant, acid resistant, alkali resistant, oil resistant and other performances, can be used for a long time at the high temperature of more than 300 ℃, and has good stability.

Alternatively, the electric heating plate can also be a carbon fiber plate.

Preferably, the upper layer cutting board and the lower layer cutting board are provided with a pair of grooves and bosses which are matched with each other, and the electric heating plate is clamped in the grooves of the rammer cutting board.

The matching of the groove and the lug boss facilitates the positioning of the upper layer cutting board and the lower layer cutting board. In addition, the electric heating plate is completely wrapped in the rammer knife plate, so that gaps are avoided at the clamped edge, and the electric heating plate can be better protected.

Preferably, the upper layer cutting board in the rammer cutting board is made of common steel, and the lower layer cutting board is made of die steel.

The die steel has higher strength and higher price, and the rammer knife plate adopts the combination of common steel and the die steel, so that the cost can be reduced. The utility model discloses a two-layer integrated configuration about will rammer cutting board changes into in this scheme, and at the in-process that rammer cutting board compaction paved the material, mainly lean on the mould steel of lower floor to have an effect, consequently, the function that rammer cutting board can not be influenced by ordinary steel yet in upper strata adoption.

Preferably, high-temperature sealant is coated at the splicing gap of the upper layer of cutting board and the lower layer of cutting board.

After the upper layer cutting board and the lower layer cutting board are spliced, a certain gap exists in the assembly position, and high-temperature sealant is coated at the gap, so that rainwater or moisture can be prevented from immersing the electric heating plate, and the performance of the electric heating plate is prevented from being influenced.

In addition, in the ironing device, both the rammer plate and the ironing base need to be heated. In the prior art, a single heating mode or a mixed heating mode is adopted for the rammer knife plate and the ironing bottom plate. For example: rammer cutting board, ironing the bottom plate all adopt electric heating's single heating methods, and current heating rod heating methods itself just has the inhomogeneous problem of heating, and ironing the surface area of bottom plate is bigger moreover, and consequently, rammer cutting board and ironing the bottom plate rate of heating are asynchronous, and it is consuming time longer to iron the bottom plate heating usually. Another example is: the ram knife board adopts the electrical heating, presses the mixed heating mode that the bottom plate adopted gas heating and can solve ram knife board and press the problem that bottom plate rate of heating is asynchronous, but owing to adopted mixed heating mode, presses the structure of device more complicated, and the equipment is troublesome, and the cost is improved.

The heating device provided in the present embodiment may further include:

the second electric heating layer is arranged on the upper surface of the ironing base plate and used for heating the ironing base plate;

and the ironing bottom plate is used for ironing the paved materials.

In the scheme, the problems of nonuniform heating and low heat transfer efficiency in the existing electric heating mode are solved by the heating mode of the electric heating layer, so that the ironing bottom plate and the rammer knife plate adopt the mode of heating the electric heating layer, and the effect of synchronous heating speed can be achieved.

Preferably, the second electric heating layer is one of conductive paint, an electric heating film, an electric heating net and an electric heating plate.

Wherein, the electric heating plate is a mica plate or a carbon fiber plate.

The electric heating layer in the rammer knife plate and the ironing bottom plate can be a single conductive coating, an electric heating film, an electric heating net, an electric heating plate or any combination. For example: the rammer knife plate and the ironing base plate are heated in a conductive coating mode. Another example is: the rammer knife plate is heated by an electric heating film, and the ironing bottom plate is heated by an electric heating plate. Importantly, the method comprises the following steps: the common point of first electric heat layer and second electric heat layer is the mode that has all adopted face with the direct contact of face, guarantees heater block and heated block area of contact's maximize, the thermally equivalent, and heat transfer efficiency is the maximize.

The invention also provides an ironing device, which comprises the heating device in any of the technical schemes.

The invention also provides a paver which comprises the ironing device in the technical scheme.

Drawings

FIG. 1 is a schematic view of a conventional ram knife plate heating mode;

FIG. 2 is a schematic cross-sectional view of a conventional ram knife plate heating method;

FIG. 3 is a schematic view of an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of one embodiment of the present invention;

FIG. 5 is a schematic view of yet another embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of another embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the technical solutions of the present application, the technical solutions of the present application will be easily understood by comparing the technical solutions of the present application with the embodiments and the drawings. It is obvious that the drawings in the following description are some embodiments of the present description, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In the present application, the heating rod means a metal rod in a bar or rod shape. The electric heating layer is processed into a thin and wide heating object.

The prior art solution is shown in fig. 1 and 2. The rammer knife board 20 of the ironing device is made of die steel of a cuboid, a round hole is punched in the die steel of the cuboid, then the square heating rod 12 is arranged in the round hole of the rammer knife board 20, and the heating rod 12 is connected to a power generator of the paver through the electric wire connector 11. The heating rod has small area of direct contact with the inside of the rammer knife board, the assembly gap is large, and the rammer knife board is locally heated and then gradually transferred to the whole rammer knife board, so that the problems of nonuniform heating and long heating time exist.

Fig. 3 and 4 show an embodiment of the present invention. The ram knife plate 20 includes an upper layer knife plate 21 and a lower layer knife plate 22. The upper and lower layers of cutting boards can be formed by cutting the rammer cutting boards of the existing specification in a split mode and then fixed by using screws 15. The mica plates 14 are laid between the upper layer and the lower layer and are connected to a generator of the paver through the electric wire connector 13. The upper surface and the lower surface of the mica plate are respectively in full contact with the upper layer cutting board 21 and the lower layer cutting board 22, so that the electric heating layer is in contact with the cutting board in the largest area, the uniform heating of the cutting board is ensured, and the heat transfer efficiency is improved. High-temperature sealant (not shown in the figure) is coated at the splicing gap of the upper layer and the lower layer of the cutting board, so that the waterproof grade of the electric heating layer can be improved.

Fig. 5 and 6 show still another embodiment of the present invention. The upper layer knife board is provided with a boss 211, the lower layer knife board is provided with a groove 221, and the mica plate 14 is clamped in the groove 221 and is completely wrapped. Compared with the previous scheme, the upper layer cutting board and the lower layer cutting board can be mutually positioned, and the assembly is easier. The mica plate 14 has a size slightly smaller than the contact surface area of the upper and lower knife boards, but has better waterproof effect. The four edges of the mica plate are completely wrapped inside the rammer knife plate, so that heat dissipation is further reduced, and high-temperature sealant is coated at the joint of the upper knife plate and the lower knife plate, so that the waterproof grade of the electric heating layer is greatly improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, rearrangements, etc. made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A heating device, comprising:

the rammer knife board is used for compacting paved materials and comprises an upper layer of knife board and a lower layer of knife board, and the first electric heating layer is arranged between the upper layer of knife board and the lower layer of knife board.

2. A heating device according to claim 1, characterized in that:

the first electric heating layer is one of conductive paint, an electric heating film, an electric heating net and an electric heating plate.

3. A heating device according to claim 2, characterized in that: the electric heating plate is a mica plate or a carbon fiber plate.

4. A heating device according to claim 3, characterized in that: the upper layer cutting board and the lower layer cutting board are provided with a pair of grooves and bosses which are matched with each other, and the electric heating plate is clamped in the grooves of the rammer cutting board.

5. A heating device according to claim 4, characterized in that: wherein, the material of upper strata cutting board is ordinary steel, and the material of lower floor's cutting board is the mould steel.

6. A heating apparatus according to any one of claims 1 to 5, wherein: high-temperature sealant is coated at the splicing gap of the upper layer of cutting board and the lower layer of cutting board.

7. The heating apparatus as claimed in claim 6, further comprising:

and the ironing bottom plate is used for ironing the paved materials.

8. A heating device according to claim 7, wherein:

the second electric heating layer is one of conductive paint, an electric heating film, an electric heating net and an electric heating plate; wherein, the electric heating plate is a mica plate or a carbon fiber plate.

9. An ironing apparatus, characterized in that: comprising a heating device according to any one of claims 1 to 8.

10. A paver, characterized in that: comprising an ironing apparatus according to claim 9.