Bridge deck asphalt surface edge rolling preheating device

Abstract

The application discloses a bridge asphalt surface layer edge rolling preheating device, an air inlet of an axial flow fan is communicated with a top end of an exhaust pipe of a paver through a short pipe, the heat collecting pipes are divided into two kinds, one kind is used as a preheating heat collecting pipe, and the other kind is used as a communicating heat collecting pipe, the preheating heat collecting pipe is horizontally arranged and is adapted to the width of a distributing chute of the paver, one end of the communicating heat collecting pipe is communicated with an air outlet of the axial flow fan, and the other end is communicated with a middle part of the preheating heat collecting pipe, both ends of the preheating heat collecting pipe are closed, and drill holes are arranged in a spiral direction at the lower preheating area of the preheating heat collecting pipe, when the paver advances, hot air is sprayed outwards through the drill holes, the edge part is blown backwards, and the middle part is relatively blown forwards, so that the edge part is preheated firstly, the middle part is preheated later, and the preheating effect of the edge part is ensured firstly. The application preheats and keeps warm the surface of a lower bearing layer before paving by using the hot air discharged by the paver, and the edge rolling effect of the asphalt surface layer is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of bridge deck asphalt pavement laying techniques, in particular to a kind of bridge deck asphalt pavement edge compaction preheating device. BACKGROUND

[0002] At present, the construction management of domestic highway asphalt pavement, mainly focus on the control of individual technical index, not fully consider the special environment of bridge deck asphalt pavement construction, i.e. the geographical location of the project, air convection is strong, wind is big, mixture is obviously cooled in paving, rolling process, forming is faster, plus mixture paving process due to segregation causes the effect of edge compaction to be poor, leading to the decrease of edge density, prone to larger void, seepage, frost heaving, loose, pit and other diseases. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, provide a kind of bridge deck asphalt pavement edge compaction preheating device with light structure, quick assembly, convenient to use and certain universality.

[0004] The technical scheme of the present application is:

[0005] A kind of bridge deck asphalt pavement edge compaction preheating device, including axial flow fan and heat pipe, wherein: the axial flow fan is arranged on paver, and the air inlet of the axial flow fan is communicated with the top end of the exhaust pipe of paver by short tube, the heat pipe is divided into two kinds, one is as preheating heat pipe, one is as communication heat pipe, wherein, the preheating heat pipe is horizontally arranged and is adapted to the width of the material distribution groove of paver, one end of the communication heat pipe is communicated with the air outlet of the axial flow fan, the other end of the communication heat pipe is communicated with the middle part of the preheating heat pipe, the two ends of the preheating heat pipe are closed, the lower part of the preheating heat pipe is provided with drill hole in the spiral direction, when paver advances, hot gas is sprayed outwards through the drill hole, the edge is blown backward, the middle part is relatively blown forward, so that the edge is preheated first, the middle part is preheated later, first ensure the preheating effect of edge.

[0006] Further: the heat pipe is wrapped with a layer of heat preservation waterproof material, the heat preservation waterproof material layer is provided with buckles at intervals outside, the buckles adopt hoop structure.

[0007] Further: the communication heat pipe is arranged on paver by bracket, according to the shape of paver, the communication heat pipe is arranged into the combination of horizontal segment, vertical segment, diagonal segment or arc segment, and elbow connection is arranged at the connection of different segments.

[0008] Further: the preheating heat pipe is arranged on paver by bracket, and three-way pipe is arranged at the communication part of the preheating heat pipe and the communication heat pipe.

[0009] Further, the communication set heat pipe and the communication of preheating heat pipe are provided with a flow distribution plate, so that the hot air diffuses along the road surface width direction.

[0010] Further, the air exhaust pipe of the paver is provided with a flow distribution cover, when the fan is closed or the displacement is reduced, the flow distribution cover is lifted by the hot air, and the excess hot air can be smoothly discharged.

[0011] The beneficial effects of the present application are:

[0012] 1. The materials required for the preparation of the present application are all standardized products, which are easy to obtain or process. Through the reasonable combination of axial flow fan, heat pipe and tee pipe, the hot air discharged from the paver is used for preheating and heat preservation of the surface of the lower bearing layer before paving, and the edge rolling effect of the asphalt surface layer is improved.

[0013] 2. The layout of the main components of the present application is flexible, and according to different models of pavers, fixed points are set to avoid obstacles, and the size of the heat pipe can be selected according to the exhaust flow rate of the paver, so that the sprayed hot air has a certain temperature and speed, and the ideal preheating effect is obtained.

[0014] 3. The heat pipes arranged along the width direction of the two sides of the distribution groove are connected through tee pipes, and the horizontal pipes of the tee pipes are provided with flow distribution plates to distribute the hot air to both sides, reduce the temperature drop, and improve the preheating effect.

[0015] 4. According to the set preheating range of the lower bearing layer and the normal driving speed of the paver, exhaust holes are drilled in the bottom of the horizontal heat pipes on both sides of the tee pipe in a spiral direction, and the position, size and spacing of the air holes are determined on site, so that the edge is preheated first, the heat preservation effect of the edge can be guaranteed, the setting time of the paving material is delayed, and the rolling effect is good.

[0016] 5. The preheating and heat preservation scheme of the lower bearing layer designed in the present application can reasonably recycle the hot air discharged from the paver and remove the floating dust and water vapor on the surface of the lower bearing layer. Due to the increase in temperature, the asphalt of the connecting layer is in a softened state, the adhesion with the paving layer is increased, and the overall effect after rolling is improved.

[0017] 6. The present application has reasonable design, light structure, fast assembly, convenient use, strong universality, easy popularization and implementation, and good social and economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the bridge asphalt surface layer edge rolling preheating device;

[0019] Figure 2 It is Figure 1 It is a top view of the bridge asphalt surface layer edge rolling preheating device shown in the figure;

[0020] Figure 3 For Figure 2 The structure diagram of the heat collecting pipe;

[0021] Figure 4 For Figure 1 The preheating working diagram of the heat collecting pipe;

[0022] Figure 5 For Figure 4 The distribution diagram of the drill hole;

[0023] Figure 6 For Figure 2 The hot gas distribution diagram of the heat collecting pipe. DETAILED DESCRIPTION

[0024] Embodiment: refer to Figure 1 — Figure 6 , in the figure, 1-axial flow fan, 2-heat collecting pipe, 3-buckle, 4-bracket, 5-traveling caterpillar, 6-paver exhaust pipe, 7-instrument panel, 8-cab, 9-distributing chute, 10-spiral blade, 11-hopper, 12-conveyer belt, 13-distribution plate, 14-three-way pipe, 15-thermal insulation waterproof material layer, 16-drill hole, 17-distribution cover, 18-connecting rod.

[0025] A bridge deck asphalt surface layer edge rolling preheating device, comprising an axial flow fan 1 and a heat collecting pipe 2, wherein: the axial flow fan 1 is arranged on a paver, the paver comprising a machine body, a traveling caterpillar 5, a cab 8, an instrument panel 7 and a distributing chute 9, the distributing chute 9 being connected with the machine body through a connecting rod 18, the distributing chute 9 being provided with a spiral blade 10, mixed materials being poured into a hopper 11, a conveyer belt 12 running backward to transport the mixed materials into the distributing chute 9, and then the mixed materials being sent to two ends by the spiral blade 10 in the distributing chute 9.

[0026] The air inlet of the axial flow fan 1 is communicated with the top end of the paver exhaust pipe 6 through a short pipe, of course, a flexible short pipe is better, the heat collecting pipe 2 is divided into two kinds, one being a preheating heat collecting pipe and the other being a communicating heat collecting pipe, wherein the preheating heat collecting pipe is horizontally arranged and adapted to the width of the distributing chute 9 of the paver, one end of the communicating heat collecting pipe is communicated with the air outlet of the axial flow fan 1, the other end of the communicating heat collecting pipe is communicated with the middle part of the preheating heat collecting pipe, and the two ends of the preheating heat collecting pipe are closed, the lower preheating area of the preheating heat collecting pipe is provided with drill holes 16 in the spiral direction at intervals, when the paver advances, hot gas is sprayed outwards through the drill holes 16, the edge part is blown backward, and the middle part is relatively blown forward, so that the edge part is preheated first, the middle part is preheated later, and the preheating effect of the edge part is ensured first.

[0027] The preferred embodiment is that the heat collecting pipe 2 is wrapped with a layer of heat preservation and waterproof material 15, and the buckle 3 is arranged outside the heat preservation and waterproof material 15, and the buckle 3 adopts a hoop structure, and of course other connection modes such as steel wire binding can also be adopted, which will not be described in detail.

[0028] The preferred embodiment is that the communicating heat collecting pipe is arranged on the paver through the bracket 4, and according to the shape of the paver, the communicating heat collecting pipe is arranged into a combination of horizontal segments, vertical segments, diagonal segments or arc segments, and the connecting positions of different segments are provided with elbow joints.

[0029] The preferred embodiment is that the preheating heat collecting pipe is arranged on the paver through the bracket 4, and the communicating position of the preheating heat collecting pipe and the communicating heat collecting pipe is provided with a tee pipe 14.

[0030] The preferred embodiment is that the communicating position of the communicating heat collecting pipe and the preheating heat collecting pipe is provided with a flow distribution plate 13, so that the hot air diffuses along the width direction of the road surface, and the flow distribution plate 13 is a triangular structure.

[0031] The preferred embodiment is that the paver exhaust pipe 6 is provided with a flow distribution cover 17, when the fan is closed or the discharge capacity is reduced, the flow distribution cover 17 is lifted by the hot air, and the excess hot air can be smoothly discharged.

[0032] I. Production of the preheating device:

[0033] 1. Connection of the axial flow fan and the paver exhaust pipe:

[0034] The discharge flow rate of the paver exhaust pipe 6 is measured, a small axial flow fan 1 of an appropriate type is selected, the inlet of the fan is connected to the top end of the exhaust pipe through a flexible short pipe, the outlet is connected to the heat collecting pipe through a flexible short pipe, or a connection position can be reserved, the fan is fixed on the top surface of the body of the paver by the buckle. The flow distribution cover 17 is arranged on the paver exhaust pipe 6, when the fan is closed or the discharge capacity is reduced, the flow distribution cover is lifted by the hot air, and the excess hot air can be smoothly discharged.

[0035] 2. Layout of the heat collecting pipe along the body:

[0036] According to the discharge flow of the axial flow fan, a thin-walled steel pipe of an appropriate specification (an appropriate inner diameter to make the hot air spraying speed appropriate to ensure the preheating and heat preservation effect) and an elbow and a tee pipe are selected, and the communicating heat collecting pipe is arranged along the paver to the left (facing the forward direction), downward, backward, right, backward, left and right.

[0037] The bracket 4 (welded from a small section steel) and the buckle 3 (made of flexible high-temperature resistant material) are welded and fixed at appropriate positions, and attention should be paid to avoiding obstacles, on-site sizing and flexible arrangement. When the communicating heat collecting pipe changes direction, the straight pipe is connected by an elbow pipe, and the connection form can be determined on site.

[0038] 3. Layout of the heat collecting pipe along the distribution chute:

[0039] The preheating pipe arrangement position is determined according to the preheating range measured on site, the bracket 4 and the buckle 3 are welded and fixed at the front end of the distribution chute at the rear of the paver, and the exhaust holes are drilled in the horizontal preheating pipe at the two sides of the tee pipe in a spiral direction. The position, size and spacing of the exhaust holes are measured on site to achieve the preheating effect.

[0040] 4. Arrangement of tee pipe and connection with transverse preheating pipe:

[0041] The preheating pipe arranged along the full width direction of the distribution chute 9 is composed of the tee pipe 14 in the middle and the straight preheating pipes at the two sides. The flow distribution plate 13 is arranged at the middle part of the horizontal pipe of the tee pipe 14, so that the hot air diffuses in the preheating pipe along the width direction of the pavement. The end part of the preheating pipe is closed. The exhaust holes are drilled in the horizontal preheating pipe at the two sides of the tee pipe in a spiral direction. The position, size and spacing of the exhaust holes are measured on site to ensure that the edge part is preheated first and the edge part is kept warm, and the setting time of the paving material is delayed.

[0042] 5. Fixing of preheating pipe:

[0043] The preheating pipe 2 is wrapped with suitable heat-insulating and waterproof material 15. When wrapping the preheating pipe arranged along the full width direction of the distribution chute 9 at the rear of the paver, holes or slots are punched at the corresponding positions of the drilled holes to prevent the hot air from being blocked and affecting the preheating effect.

[0044] After wrapping is completed, the pipe fixing condition is checked. If necessary, support pads are adopted and the bracket is adjusted to stabilize the pipe. Finally, the buckle 3 is locked.

[0045] 6. Laying of electric circuit:

[0046] The electric circuit of the axial flow fan to the power supply is arranged at a proper position along the body of the paver, and a control switch is installed on the instrument panel of the cab, which has three gears of high speed, low speed and stop to meet the construction requirements under different air temperatures.

[0047] 7. Device debugging:

[0048] The paver is started, and after preheating for a proper time, the fan control switch is turned on. The pipe stability under different gears, the opening and closing of the flow distribution cover of the exhaust pipe of the paver, the temperature of the hot air discharged from the rear preheating pipe, the diffusion range, the surface temperature of the lower layer and the corresponding paving speed are measured to accumulate experience data for large-scale construction.

[0049] Method of use:

[0050] 1. Start the paver and perform preheating, leveling and other preparation work.

[0051] 2. Turn on the axial flow fan 1 control switch and select the preheating gear according to the construction air temperature.

[0052] 3. Measure the preheat temperature and determine the paving machine travel speed.

[0053] 4. At the end of the paving work, first shut down the axial flow fan, and keep the engine of the paving machine running for about 5 minutes to facilitate the pipeline cooling.

[0054] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification according to the technical essence of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A bridge deck asphalt pavement edge rolling preheating device comprising an axial flow fan and a heat collecting tube, characterized in that: The axial flow fan is arranged on the paver, and the air inlet of the axial flow fan is communicated with the top end of the exhaust pipe of the paver through a short pipe, the heat collecting pipe is divided into two types, one is a preheating heat collecting pipe, and the other is a communicating heat collecting pipe, wherein the preheating heat collecting pipe is horizontally arranged and adapted to the width of the distributing chute of the paver, one end of the communicating heat collecting pipe is communicated with the air outlet of the axial flow fan, the other end of the communicating heat collecting pipe is communicated with the middle part of the preheating heat collecting pipe, both ends of the preheating heat collecting pipe are closed, and the lower preheating area of the preheating heat collecting pipe is provided with drill holes in a spiral direction, when the paver advances, hot air is sprayed outwards through the drill holes, the side part is blown backward, and the middle part is relatively blown forward, so that the side part is preheated first, the middle part is preheated later, and the preheating effect of the side part is ensured first.

2. The bridge deck asphalt pavement edge rolling and preheating device according to claim 1, characterized in that: The heat collecting pipe is wrapped with a layer of heat preservation and waterproof material, and buckles are arranged outside the layer of heat preservation and waterproof material.

3. The bridge deck asphalt pavement edge rolling and preheating device according to claim 1, characterized in that: The communicating heat collecting pipe is arranged on the paver through a bracket, and according to the shape of the paver, the communicating heat collecting pipe is arranged in combination of horizontal segments, vertical segments, diagonal segments or arc segments, and elbows are arranged at the connecting positions of different segments.

4. The deck asphalt pavement edge rolling and preheating device according to claim 1, characterized in that: The preheating heat collecting pipe is arranged on the paver through a bracket, and a tee pipe is arranged at the communicating position of the preheating heat collecting pipe and the communicating heat collecting pipe.

5. The deck asphalt pavement edge rolling and preheating device according to claim 1, characterized in that: A flow distribution plate is arranged at the communicating position of the communicating heat collecting pipe and the preheating heat collecting pipe, so that hot air is diffused along the width direction of the road surface.

6. The deck asphalt pavement edge rolling and preheating device according to claim 1, characterized in that: A flow distribution cover is arranged on the exhaust pipe of the paver, when the fan is closed or the discharge capacity is reduced, the flow distribution cover is lifted by hot air, and the excess hot air can be smoothly discharged.

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