WO2011124152A1

WO2011124152A1 - Combustion chamber structure of paver

Info

Publication number: WO2011124152A1
Application number: PCT/CN2011/072553
Authority: WO
Inventors: 瞿静; 许辉; 许少铭; 严日村; 刘兵华; 邓虎; 苏竹新
Original assignee: 长沙中联重工科技发展股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2010-04-08
Filing date: 2011-04-08
Publication date: 2011-10-13
Also published as: CN101864721B; CN101864721A

Abstract

A combustion chamber structure of a paver includes a screed plate housing (10), a combustion chamber (20) and a linear heater. The screed plate housing (10) includes a screed bottom plate (101), and the linear heater includes a linear heating pipe (70). The combustion chamber structure also includes a heat insulating plate (40) located in the combustion chamber (20) and installed between the linear heating pipe (70) and the screed bottom plate (101). The combustion chamber structure of the paver is capable of solving the problem that the paving quality is lowered due to the deformation of the screed bottom plate (101) caused by the local overheat on the screed bottom plate (101).

Description

The structure of the combustion chamber of the paver This application claims the priority of the invention patent application filed on April 8, 2010 to the State Intellectual Property Office of China, application number 201010141695.7, and the invention titled "combustion chamber structure of the paver". TECHNICAL FIELD The present invention relates to the field of road construction equipment, and more particularly to a combustion chamber structure of a paver. BACKGROUND OF THE INVENTION At present, there are three main heating modes for a heating system: 1. Gas heating method: The fuel is propane gas, including: (1) nozzle heating mode, propane gas passing through a pressure reducing valve, a pipeline, a switch, to The nozzle, which heats the screed plate by igniting the nozzle.

(2) Fan burner heating mode, propane gas passes through the pressure reducing valve, the pipeline to the fan burner, opens the fan burner, and blows hot air into the screed combustion chamber to heat the bottom plate. (3) Linear heater heating method, the linear heating tube of the linear heater is located in the cavity formed by the screed box of the 4 difficult paver (commonly called the combustion chamber), and the propane gas passes through the pressure reducing valve and gas. The linear heating tube of the valve and the line-type heater. After the spark plug is fired, the propane gas flowing out from the linear heating tube is ignited, and the flame burned from the linear heating tube directly burns and heats the entire ironing board. .

2. Electric heating mode: Direct force p heat is applied to the bottom plate through generators, circuits, cables, switches and electric heating tubes. 3. Fuel heating method: 喷洒 Spray diesel oil, directly burn, and heat the screed bottom plate. In the above heating method, in addition to the heating method of the linear heater, several other heating methods; *more or less problems such as slow heating, poor heating uniformity, etc., the flat bottom plate is prone to local deformation and distortion due to long-term uneven heating. The amount of gas consumed or the amount of electricity is large. When the outdoor temperature is low, even if it is burned for a long time, the temperature is difficult to come up, so that the ironing board cannot work normally, which seriously affects the quality and progress of the road surface. Although the linear heater heating method has the characteristics of fast heating, the linear heating tube is generally located near the middle portion of the ironing board, and the flame of the linear heating tube directly heats the ironing board, and the line The propane gas combustion in the middle portion of the heating tube is sufficiently burned by the propane gas at both ends, which tends to cause uneven heating of the ironing board. Therefore, the prior art linear heater heating method has the following problems: The temperature is higher than the edge temperature and the temperature difference is very large; the flat plate is especially located in the area where the flame of the linear heating tube burns due to the high temperature long-term radiation, the thermal stress is concentrated, the annealing reaction is easy to occur, the scale is generated, and the ironing plate is lowered. The wear resistance of the material, when encountering obstacles, the area where the thermal stress concentration of the ironing board is concentrated is more likely to be deformed, affecting the flatness of the paved road surface and shortening the service life of the ironing board. SUMMARY OF THE INVENTION The present invention is directed to a combustion chamber structure of a paver capable of solving the above problems in the prior art. According to an aspect of the present invention, a combustor structure of a paver is provided, comprising: an screed box, a combustion chamber, and a line heater; the screed box includes a screed bottom plate, and the line heater includes a line type The heating pipe further comprises: a heat insulation plate located in the combustion chamber and disposed between the linear heating pipe and the ironing floor. Further, the heat shield is attached to the first side wall of the combustion chamber. Further, one side of the heat shield is connected to the first side wall of the combustion chamber, and the combustion chamber structure further includes: a baffle connected to the second side wall of the combustion chamber opposite to the first side wall, the diversion The plate and the heat shield are staggered in the combustion chamber. Further, the deflector, the heat shield and the ironing floor are parallel to each other, and the distance between the deflector and the ironing floor is greater than the distance between the heat shield and the flat floor. Further, a plurality of through holes are provided in the heat shield and/or the deflector. Further, the length of the baffle is equal to or less than the length of the combustion chamber, and is centrally disposed within the combustion chamber. Further, the through hole provided on the deflector is a plurality of first holes, and the plurality of first holes are along the longitudinal direction of the linear heating tube, and have a non-uniform distribution on the deflector with more ends and less in the middle. Further, the through hole provided on the heat insulating plate is a plurality of second holes at the edges thereof. Further, the area of the second hole is larger than the area of the first hole. Further, the heat shield extends toward the first flange in the direction of the flow plate, and the first flange is fixed on the deflector; the first flange has a plurality of third holes. Further, one end of the deflector extending into the combustion chamber has a second flange, and the second turn is connected to the top wall of the combustion chamber; and the second flange has a plurality of fourth holes. Further, the length of the heat shield is less than the length of the deflector. According to the technical solution of the present invention, since the heat insulating plate located in the combustion chamber is used, the heat insulating plate is disposed between the linear heating pipe and the ironing bottom plate, so that the flame generated from the middle combustion of the linear heating pipe is at least partially separated. Under the action of the hot plate, the bottom plate is not directly burned, and the overheating damage to the screed bottom plate, especially the screed bottom plate under the burning flame, is avoided, and the temperature difference between the middle portion and the edge portion of the screed plate is lowered. Therefore, in the prior art, the combustion flame in the linear heating pipe of the prior art directly heats the flat plate, the thermal stress is concentrated, and the temperature difference is large, which causes the ironing plate to be easily deformed locally, the paving quality is lowered, and the service life of the floor is lowered. The problem, in turn, achieves the effect of increasing the service life of the ironing board and ensuring the quality of the pavement. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in FIG. In the drawings: Figure 1 shows a cross-sectional structure of a first embodiment of a combustion chamber structure of a paver according to the present invention; Figure 2 shows a combustion chamber structure of a paver according to the present invention. Sectional structure of a second embodiment; FIG. 3 shows a cross-sectional structure of a third embodiment of a combustion chamber structure of a paver according to the present invention; and FIG. 4 shows a third embodiment according to the present invention. Partial three-dimensional structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. 1 is a cross-sectional view showing a first embodiment of a combustion chamber structure of a paver according to the present invention, as shown, the combustion chamber structure of the paver includes: an screed box 10, burning The chamber 20 and the line heater; the screed box 10 includes a screed bottom plate 101, the combustion chamber is a cavity formed in the screed box 10, and the linear heater includes a linear heating tube 70, the combustion chamber structure The utility model further comprises: a heat insulation board 40, located in the combustion chamber 20, and disposed between the linear heating tube 70 and the ironing bottom plate 101 for blocking the flame from the burning of the linear heating tube 70 to directly burn the ironing board 101. Thus, the overheating damage caused by the heating method of the linear heater in the prior art to the local area of the ironing board, especially the ironing board under the burning flame, is overcome, resulting in local deformation of the ironing board and paving paving quality. And the problem of ironing the life of the bottom plate, etc., thereby achieving the effect of improving the service life of the ironing board and ensuring the quality of the road surface. The heat shield 40 can be up to 500 resistant. A high-temperature heat-resistant steel sheet which is not deformed or oxidized at a high temperature, and a preferred structure of the heat-insulating sheet 40 may be such that, as shown in FIG. 1, one side of the heat-insulating panel 40 is welded and riveted. Or screwing or the like to the first side wall 102 of the combustion chamber, that is, fixed to the inner wall of the screed box forming the combustion chamber, the heat insulation board 40 may be substantially parallel to the ironing board 101, or may be ironed The bottom plate 101 forms a certain inclination angle. The heat shield is generally welded to the first side wall 102 of the combustion chamber, which is convenient to manufacture and does not affect the accuracy of the screed. Preferably, a plurality of through holes may be formed in the heat insulating plate 40 at a region where the flame generated by the burning of the linear heating tube 70 is directly burned, so that the hot air can flow better under the heat insulating plate 40, This does not allow the burning flame to directly squash the floor while not affecting the heating of the screed floor below the insulation panel 40. Further, in order to stabilize the structure of the heat insulating panel 40, the heat insulating panel 40 may be extended into one end of the combustion chamber 20 to be bent toward the top wall of the combustion chamber, and welded to the top wall of the combustion chamber. As a further improvement of the present invention, FIG. 2 schematically shows a second embodiment of the present invention. As shown, one side of the heat shield 40 is attached to the first side wall 102 of the combustion chamber, for example, for welding. . When the screed case is mounted in this way, the position of the heat insulating plate 40 between the in-line type heating pipe 70 and the screed 101 can be easily fixed by welding. The combustor structure further includes: a baffle 50 connected to the second side wall 103 of the combustion chamber, and the baffle 50 and the heat shield 40 are alternately disposed in the combustion chamber 20, such as the baffle 50 and the heat shield 40. They are all plate-shaped and parallel to the flat bottom plate 101, which facilitates the positioning and installation of the deflector and the heat shield. Of course, the baffle 50 and the heat shield 40 can also be not parallel to the ironing plate according to actual use. The distance between the deflector 50 and the flat bottom plate 101 is greater than the distance between the heat insulating plate 40 and the flat bottom plate 101. Thus, the baffle 50 and the heat insulating plate 40 cooperate to substantially separate the combustion chamber 20 into two spaces, one It is a first space 201 adjacent to the ironing floor 101, and the other is a second space in which the line heating tube 70 is located. By appropriately adjusting the height of the baffle 50, the influence of the flame generated by the combustion of the linear heating tube 70 on the baffle 50 can be avoided, so that the baffle 50 can be made of a common steel plate or the like to reduce the cost, and The hot air heated by the linear heating tube 70 easily enters the first space 201 from the space 3 between the heat insulating panel 40 and the deflector 50 to heat the ironing board 101. Of course, the baffle can also be made of heat-resistant steel. Referring to Figures 3 and 4, a third embodiment of the present invention is shown. The improvement over the second embodiment described above is that the deflector 50 is provided with a plurality of first holes 502 for guiding The role of hot air flow in a space. For example, the length of the baffle is equal to or slightly less than the length of the combustion chamber (the length direction in the present invention is based on the length direction of the linear heating tube), and the baffle is disposed substantially centrally within the combustion chamber in the length direction. In this way, under the action of the baffle 50, the hot air is guided to the entire screed floor in the combustion chamber, and at the same time, the plurality of first holes 502 on the baffle 50 are arranged through a regular arrangement, so that the hot air is in the first A space 201 can be sufficiently flowed back and forth, left and right, and the hot air is uniformly guided to the edge of the ironing bottom plate, thereby achieving the effect of quickly and uniformly heating the ironing board 101 as a whole. The arrangement of the plurality of first holes 502 may be such that a larger number of first holes 502 are formed in the baffle 50 at the edge of the corresponding ironing board 101, and the flow is guided near the middle of the line heating tube 70. A relatively small number of first holes 502 are formed in the plate 50. The plurality of first holes 502 are along the longitudinal direction of the linear heating tube 70 on the deflector 50, and have an uneven distribution state in which both ends are large and the middle is small. Thus, the hot air flows more easily to the space at the edge of the ironing board 101, so that the ironing board 101 can be uniformly heated, and the temperature difference between the middle position and the edge position of the floor 101 can be lowered more quickly. As shown in FIGS. 3 and 4, the heat insulating panel 40 in the above embodiment is disposed substantially below the inline heat pipe 70. In the present invention, the length and mounting position of the heat shield 40 can be set and installed according to actual conditions. Preferably, the length of the heat shield 40 is smaller than the length of the linear heating tube 70, for example, a heat shield is provided only at a position corresponding to a central portion of the linear heating tube 70. Preferably, the length of the heat shield 40 is approximately 2/3 of the length of the linear heating tube 70. Because in general, the flame temperature in the middle portion of the linear heating pipe 70 is higher, the two ends are lower, the length of the heat insulating plate 40 is about 2/3 of the length of the linear heating pipe 70 and the heat insulating plate 40 is substantially centered on the line. When the lower position of the heating tube 70 is used, it is possible to greatly reduce the overheating effect of the flame generated by the combustion of the heating tube 70 on the local area of the ironing board 101. Of course, the length of the heat shield 40 can also be greater than or less than 2/3 of the length of the linear heating tube 70. In addition, a plurality of second holes 402 may be formed at the edge of the heat shield plate, so that the weight of the heat shield plate 40 can be reduced, and the second hole 402 also serves to guide the hot air, which is beneficial to heat. Air enters the first space 201 to enhance the heating effect on the ironing board 101 located below the heat shield 40. In addition, in order to form the first space 201 to form a large semi-closed space, the time for the hot air to remain in the first space is extended to enhance the heating effect on the ironing board, and the heat insulation is along the length of the line heating tube. The length of the plate 40 is less than the length of the baffle 50. The area of the second hole 402 disposed on the heat shield 40 in the above embodiment is larger than the area of the first hole 502 disposed on the deflector 50, so that the hot air is relatively easy to enter the first space 201 and is not easily accessible from the first The space 201 flows out so that the hot air stays in the first space 201 for a longer period of time, so that only a small amount of propane gas needs to be burned to bring the ironing board 101 to an usable temperature, thereby saving gas consumption. For example, the first hole 502 is a circular hole or an elliptical hole, and the second hole 402 is a rectangular hole, which is convenient for manufacturing. In order to make the connection between the baffle, the heat shield and the screed box stable and reliable, preferably, the baffle has a flat shape, and the heat shield 40 extends in the direction of the flow plate 50 to extend the first flange 401, the first flange The 401 is welded to the deflector 50. At the same time, a plurality of third holes having a larger area are formed on the first flange 401 to facilitate the flow of hot air to the first space 201. Preferably, for example, as shown in FIG. 3, one end of the deflector 50 extending into the combustion chamber 20 has a second flange 501, and the second flange 501 is welded to the top wall 104 of the combustion chamber to strengthen the deflector. Structural stability. At the same time, a plurality of fourth holes having a larger area are opened on the second flange to facilitate the circulation of air. The first flange 401 is welded to the deflector 50 because the heat shield 40 extends in the direction of the flow plate 50, so that the structure of the heat shield 40 is stable and reliable. At the same time, the first flange 401 has a plurality of third holes having a larger area to facilitate the flow of hot air to the first space 201. In addition, a temperature sensor can be disposed on the ironing board 101. When the ironing board 101 reaches a preset usable temperature, the temperature sensor can feedback the paver control system to automatically disconnect the paver control system. Propane gas further reduces energy consumption. After the test-risk proof, the combustion chamber structure according to the second embodiment of the present invention, that is, the combustion chamber structure shown in FIG. 3 and FIG. 4, can be at 15 at room temperature (20 ° C) and at a gas pressure of 0.08 MPa. In about minutes, the temperature of the edge of the screed plate reaches the usable temperature of 90 °C, and the difference between the edge temperature and the intermediate temperature does not exceed 60 °C. From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: According to the combustion chamber structure of the paver of the present invention, when the ironing board is heated by the linear heater heating method, the combustion is performed. Short time and uniform heating, avoiding the flattening of the bottom plate due to local overheating Deformation, affecting the quality of paving and the problem of ironing the life of the floor. At the same time, the paver according to the present invention can bring the ironing board to an usable temperature in a short period of time, consumes less air, and saves energy consumption. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A combustor structure for a paver, comprising: an screed box (10), a combustion chamber (20), and a line heater; the screed box (10) includes a screed bottom plate (101), The linear heater includes a linear heating tube (70), wherein the combustion chamber structure further comprises: a heat shield (40) located in the combustion chamber (20) and disposed on the line type A heating tube (70) is interposed between the heating plate (70) and the ironing plate (101).

2. The combustor structure of a paver according to claim 1, characterized in that the heat shield (40) is connected to the first side wall (102) of the combustion chamber (20).

3. The combustor structure of a paver according to claim 1, wherein one side of the heat shield (40) is connected to a first side wall (102) of the combustion chamber. The combustion chamber structure also includes:

a baffle (50) connected to the second side wall (103) of the combustion chamber opposite to the first side wall (102), the baffle (50) being interleaved with the heat shield (40) It is disposed in the combustion chamber (20).

4. The combustor structure of a paver according to claim 3, wherein the deflector (50), the heat shield (40) and the ironing board (101) are parallel to each other. And the large separation between the baffle (50) and the ironing board (101) is greater than the distance between the heat insulation board (40) and the ironing board (101).

The combustor structure of the paver according to claim 4, characterized in that the heat insulating plate (40) and/or the baffle (50) are provided with a plurality of through holes.

The combustor structure of the paver according to any one of claims 3 to 5, characterized in that the length of the baffle (50) is equal to or smaller than the length of the combustion chamber (20), Centered in the combustion chamber.

The combustion chamber structure of the paver according to claim 5, wherein the through hole provided in the deflector is a plurality of first holes (502), and the plurality of first holes (502) Along the longitudinal direction of the linear heating tube (70), there are many uneven ends on the baffle (50) with less ends.

8. The combustor structure of a paver according to claim 7, wherein the through hole provided in the heat insulating plate (40) is a plurality of second holes (402) at an edge thereof.

9. The combustor structure of a paver according to claim 8, wherein the area of the second hole (402) is larger than the area of the first hole (502).

The combustion chamber structure of the paver according to any one of claims 3 to 5, wherein the heat insulation panel (40) extends in a direction of the deflector (50) The first flange (401) is fixed to the deflector (50); the first flange has a plurality of third holes.

The combustor structure of the paver according to claim 10, wherein the end of the baffle (50) extending into the combustion chamber has a second flange (501), the second Flanging

(501) is coupled to the top wall (104) of the combustion chamber; and the second flange (501) has a plurality of fourth holes.

The combustor structure of a paver according to any one of claims 3 to 5, characterized in that the length of the heat shield (40) is smaller than the length of the baffle (50).