Electromagnetic heating paver ironing plate

Abstract

An electromagnetic heating paver screed plate comprises a connecting plate, a connecting plate, an end plate and a screed plate bottom plate arranged at the bottom of a closed area defined by a supporting plate, an electromagnetic heating system used for heating the screed plate bottom plate is arranged on the upper portion of the screed plate bottom plate, and the lower portion of the electromagnetic heating system is tightly attached to a heating iron plate. A heat-conducting graphite sheet is tightly pressed on the lower surface of the heating iron plate and is tightly attached to the upper surface of the ironing plate bottom plate; an engine of the paver is utilized to drive a generator to serve as a power source to supply energy to an electromagnetic heating system, an upper silica gel clamping plate and a lower silica gel clamping plate clamp an electromagnetic heating unit, the electromagnetic heating unit emits heat and transmits heat to a heating iron plate, and a bottom plate of an ironing plate is heated through a heat conduction graphite sheet pressed below the heating iron plate; the paver ironing plate heating device solves the problems of long heating time and uneven heating in the existing paver ironing plate heating mode, and has the characteristics of high heat conversion rate, even heating and small energy loss.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt pavers, and particularly relates to an electromagnetically heated paving screed. Background Art

[0002] The screed plate is one of the core devices of the paver, which directly affects the function and quality of the asphalt paved road surface. Before the paver performs paving operations, the screed plate needs to be heated. High-quality heating characteristics are the prerequisite for ensuring the flatness and density of the asphalt pavement. If the heating temperature of the screed plate is insufficient or the heating is uneven, the asphalt mixture will segregate, affecting the flatness and service life of the road surface. The existing screed plate heating methods mainly include gas heating and electric heating, both of which have certain defects in actual application.

[0003] The gas heating device uses the combustion of liquefied gas to heat the ironing plate bottom plate, and heats the vibrating beam and compacting beam by heat transfer from the bottom plate. The liquefied gas is sent to each flame nozzle through a pressure reducing valve, and each flame nozzle is ignited by an igniter, thereby generating heat in the combustion chamber to heat the bottom plate, thereby achieving the purpose of heating the ironing plate. However, gas heating has the disadvantages of uneven heating, slow heating speed, and easy local overheating, which causes annealing of the bottom plate and reduces wear resistance.

[0004] Electric heating uses the engine on the main engine to drive the generator to generate AC or DC power. The AC or DC power is connected to the electric heating rods inside the ironing plate vibrating beam, compaction beam and ironing bottom plate to generate heat, thereby heating the ironing plate bottom plate, vibrating beam and compaction beam; however, there are problems such as uneven heating, long heating time and difficult maintenance. Summary of the invention

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to propose an electromagnetically heated paving machine ironing plate, which solves the problems of long heating time and uneven heating in the existing paving machine ironing plate heating method by setting an electromagnetic heating system, a heating iron plate and a thermally conductive graphite sheet. The utility model has the characteristics of high heat conversion rate, uniform heating and low energy loss.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An electromagnetically heated paving machine ironing plate comprises a connecting plate 1, one side of the connecting plate 1 is connected to a vibrating mechanism, the other side of the connecting plate 1 is connected to end plates 2 at both ends, a support plate 3 is connected between the two end plates 2, an ironing plate bottom plate 9 is arranged at the bottom of a closed area surrounded by the connecting plate 1, the end plate 2 and the support plate 3, an electromagnetic heating system for heating the ironing plate bottom plate 9 is arranged on the upper part of the ironing plate bottom plate 9, a heating iron plate 7 is closely attached to the lower surface of the electromagnetic heating system, a thermally conductive graphite sheet 8 is pressed against the lower surface of the heating iron plate 7, and the thermally conductive graphite sheet 8 is closely attached to the upper surface of the ironing plate bottom plate 9.

[0008] The electromagnetic heating system comprises an upper silicone clamping plate 5 and a lower silicone clamping plate 6 , and a plurality of electromagnetic heating units 10 are arranged between the upper silicone clamping plate 5 and the lower silicone clamping plate 6 .

[0009] The electromagnetic heating units 10 are evenly distributed in a matrix, and the electromagnetic heating units 10 are connected in parallel.

[0010] The electromagnetic heating unit 10 includes a coil holder 101 fixed below the upper silicone clamping plate 5 and above the lower silicone clamping plate 6 , and an electromagnetic heating coil 102 is fixed between the coil holders 101 .

[0011] The electromagnetic heating coil 102 is a flat spiral electromagnetic heating coil.

[0012] The coil core of the electromagnetic heating coil 102 is a conductive wire wrapped in a polytetrafluoroethylene tube.

[0013] A temperature sensor 4 is installed at the edge of the screed bottom plate 9, and a signal output end of the temperature sensor 4 is connected to an external receiver.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model heats the paving machine ironing plate by using an electromagnetic heating method, which has high heat conversion rate, uniform heating and low energy loss. In the working state, the ironing plate will produce certain deformation and vibration, and the silicone clamping plate clamps the electromagnetic heating unit 10, which can play a certain protective role. The flat spiral electromagnetic heating coil 102 has a large heating area, and the electromagnetic heating unit 10 is installed in a matrix in the silicone clamping plate, and the temperature uniformity of the heating iron plate is good. The silicone clamping plate has the characteristics of high temperature resistance and insulation, which reduces the influence of the temperature of the heating iron plate 7 on the electromagnetic heating coil; the electromagnetic heating units 10 are connected in parallel, and the main switch controls the entire system, and the electromagnetic heating units 10 do not affect each other.

[0016] 2. The utility model presses a heat-conducting graphite sheet 8 on the lower surface of the heating iron plate 7, and the heat-conducting graphite sheet 8 is closely attached to the ironing plate bottom plate 7, thereby effectively achieving uniform heating of the ironing plate bottom plate 9.

[0017] 3. The utility model can effectively monitor the temperature of the screed plate 9 by installing the temperature sensor 4 on the edge of the screed plate 9, thereby providing data support for controlling the temperature of the screed plate.

[0018] In summary, the utility model has a clear structure, simple maintenance, and convenient use, can quickly and effectively heat the ironing plate, and has high-quality heating characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a top view of the electromagnetic heating system of the utility model.

[0021] Figure 3 It is a cross-sectional view of the electromagnetic heating system of the utility model.

[0022] In the figure: 1. connecting plate; 2. end plate; 3. support plate; 4. temperature sensor; 5. upper silicone clamping plate; 6. lower silicone clamping plate; 7. heating iron plate; 8. thermal conductive graphite sheet; 9. ironing plate bottom plate; 10. electromagnetic heating unit; 101. coil holder; 102. electromagnetic heating coil. DETAILED DESCRIPTION

[0023] The utility model is described in further detail below in conjunction with the accompanying drawings.

[0024] like Figure 1 As shown, an electromagnetically heated paving machine ironing plate comprises a connecting plate 1, one side of the connecting plate 1 is connected to a vibrating mechanism, and the other side of the connecting plate 1 is connected to end plates 2 at both ends, and a support plate 3 is connected between the two end plates 2. A ironing plate bottom plate 9 is arranged at the bottom of a closed area surrounded by the connecting plate 1, the end plate 2 and the support plate 3, and an electromagnetic heating system for heating the ironing plate bottom plate 9 is arranged on the upper part of the ironing plate bottom plate 9. A heating iron plate 7 is closely attached to the lower surface of the electromagnetic heating system, and a thermally conductive graphite sheet 8 is pressed against the lower surface of the heating iron plate 7. The thermally conductive graphite sheet 8 is closely attached to the upper surface of the ironing plate bottom plate 9, and the thermally conductive graphite sheet 8 further improves the temperature uniformity of the ironing plate bottom plate 9.

[0025] The electromagnetic heating system includes an upper silicone clamping plate 5 and a lower silicone clamping plate 6, and a plurality of electromagnetic heating units 10 are arranged between the upper silicone clamping plate 5 and the lower silicone clamping plate 6. The silicone clamping plate has the characteristics of high temperature resistance and insulation, which can reduce the influence of the temperature of the heating iron plate 7 on the electromagnetic heating unit 10.

[0026] like Figure 2 As shown, the electromagnetic heating units 10 are evenly distributed in a matrix, and the electromagnetic heating units 10 are installed in a matrix in the silicone clamping plate. The temperature uniformity of the heating iron plate 7 is good. The electromagnetic heating units 10 are connected in parallel and do not affect each other during operation. The heating system has high reliability, and the main switch can control the entire system.

[0027] like Figure 3As shown, the electromagnetic heating unit 10 includes a coil holder 101 fixed below the upper silicone clamping plate 5 and above the lower silicone clamping plate 6, and an electromagnetic heating coil 102 is fixed between the coil holders 101. The electromagnetic heating coil 102 is a flat spiral electromagnetic heating coil spirally wound in a plane, and the flat spiral electromagnetic heating coil has a large heating area.

[0028] The coil core of the electromagnetic heating coil 102 is a conductive wire, which is wrapped in a polytetrafluoroethylene tube.

[0029] A temperature sensor 4 is installed at the edge of the screed bottom plate 9. The signal output end of the temperature sensor 4 is connected to an external receiver, so that the temperature of the screed bottom plate 9 can be monitored in real time.

[0030] The working principle of the utility model is:

[0031] The paving machine ironing plate 9 is heated by electromagnetic heating. The engine of the paving machine itself drives the generator as a power source to supply energy to the electromagnetic heating system. The upper silicone clamping plate 5 and the lower silicone clamping plate 6 in the electromagnetic heating system clamp the electromagnetic heating unit 10. The electromagnetic heating coil 102 in the electromagnetic heating unit 10 induces an alternating magnetic field through an alternating current, forming an eddy current in the heating iron plate 7, so that the temperature of the heating iron plate 7 increases, and the ironing plate bottom plate 9 is heated by the thermally conductive graphite sheet 8 pressed under the heating iron plate 7.

[0032] When the ironing plate is heated, the temperature sensor 4 at the edge of the ironing plate bottom plate 9 can monitor the temperature of the ironing plate bottom plate 9 in real time to avoid the asphalt mixture segregation caused by insufficient preheating temperature of the ironing plate during paving. The temperature of the ironing plate can be controlled by controlling the current of the electromagnetic heating coil 102.

Claims

1. An electromagnetically heated paving machine screed, comprising a connecting plate (1), one side of the connecting plate (1) being connected to a vibrating mechanism, characterized in that: The other side of the connecting plate (1) is connected to the end plates (2) at both ends, and the support plate (3) is connected between the two end plates (2). A screed plate bottom plate (9) is arranged at the bottom of the closed area surrounded by the connecting plate (1), the end plates (2) and the support plate (3). An electromagnetic heating system for heating the screed plate bottom plate (9) is arranged on the top of the screed plate bottom plate (9). A heating iron plate (7) is closely attached to the bottom of the electromagnetic heating system. A heat-conducting graphite sheet (8) is pressed against the bottom surface of the heating iron plate (7), and the heat-conducting graphite sheet (8) is closely attached to the upper surface of the screed plate bottom plate (9).

2. The electromagnetically heated paving screed according to claim 1, characterized in that: The electromagnetic heating system comprises an upper silicone clamping plate (5) and a lower silicone clamping plate (6), and a plurality of electromagnetic heating units (10) are arranged between the upper silicone clamping plate (5) and the lower silicone clamping plate (6).

3. The electromagnetically heated paving screed according to claim 2, characterized in that: The electromagnetic heating units (10) are evenly distributed in a matrix, and the electromagnetic heating units (10) are connected in parallel.

4. An electromagnetically heated paving machine screed according to claim 2 or 3, characterized in that: The electromagnetic heating unit (10) comprises a coil holder (101) fixed below the upper silicone clamping plate (5) and above the lower silicone clamping plate (6), and an electromagnetic heating coil (102) is fixed between the coil holders (101).

5. The electromagnetically heated paving screed according to claim 4, characterized in that: The electromagnetic heating coil (102) is a flat spiral electromagnetic heating coil.

6. An electromagnetically heated paving machine screed according to claim 4 or 5, characterized in that: The coil core of the electromagnetic heating coil (102) is a conductive wire wrapped in a polytetrafluoroethylene tube.

7. The electromagnetically heated paving screed according to claim 1, characterized in that: A temperature sensor (4) is installed on the edge of the ironing plate bottom plate (9), and the signal output end of the temperature sensor (4) is connected to an external receiver.

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