Chemical spraying device for concrete pavement and method for constructing concrete pavement

Abstract

The present invention provides a concrete pavement chemical spraying device and a concrete pavement construction method that enable the application of chemicals to large-area concrete pavements in a short period of time with minimal manpower. [Solution] The concrete pavement chemical spraying device 100 of the present invention comprises a frame, a traveling means 40 for moving the frame, a chemical tank 50 on the frame, a chemical supply means 60 for supplying chemicals from the chemical tank 50, a spraying means 70 for spraying the chemicals supplied from the chemical supply means 60, and a control means 81 and its power supply 80 for controlling the traveling means 40 and the chemical supply means 60.

Description

Technical Field

[0001] The present invention relates to a chemical spraying device for concrete paving and a method for constructing concrete paving.

Background Art

[0002] Compared with asphalt paving, concrete paving requires a high cost and a long curing period, so it may be necessary to block traffic for a long time. On the other hand, it is less likely to crack and has high durability and load-bearing capacity.

[0003] In concrete paving, a curing agent is sprayed while the concrete is still uncured after the concrete is placed. By spraying the curing agent, the wet state of the concrete surface can be maintained, and cracking due to dry shrinkage can be prevented.

[0004] In addition to the curing agent, a surface treatment agent may be sprayed on the surface of the concrete paving for the purpose of enhancing heat resistance, waterproofness, durability, etc. Examples of such surface treatment agents include silicate-based chemicals as described in Patent Document 1 and Patent Document 2.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] Curing agents are typically applied manually to unhardened concrete using hand sprayers, with a person riding on a cart or similar vehicle with wheels on the outside. This method is labor-intensive. However, the application speed of curing agents is not a major concern. This is because, when applying curing agents to concrete pavement, the agent is applied before the concrete pavement hardens, so it is sufficient to apply it at a speed roughly the same as the concrete pavement's pouring speed. Typically, the area of ​​concrete pavement that can be constructed per day is limited, for example, 1000 m² per day. 2 Since the application is limited to a certain extent, the curing agent only needs to be applied to a similar area per day, and in this case, it can be applied using a commercially available manual sprayer.

[0007] On the other hand, when applying surface treatment agents as described in Patent Documents 1 and 2, the application is carried out after the concrete pavement has hardened, and is applied in two or three layers. In this case, the application speed of the agent is not a major problem for relatively small areas, but when applying to large areas such as airports, it can take several weeks to apply using commercially available sprayers.

[0008] Therefore, the present invention provides a concrete pavement chemical spraying device and a concrete pavement construction method that enable the spraying of chemicals onto large-area concrete pavements in a short period of time with minimal manpower required. [Means for solving the problem]

[0009] The present inventors have found that a concrete pavement chemical spraying device and a concrete pavement construction method having the following embodiments can solve the above problems.

[0010] In other words, the present invention has the following aspects:

[0011] 《Aspect 1》 Frame, A means for driving the aforementioned frame, Chemical tank on the frame, A drug supply means for supplying drugs from the aforementioned drug tank, A spraying means for spraying the chemical supplied from the chemical supply means, and Control means and power supply for controlling the aforementioned driving means and drug supply means, A chemical spraying device for concrete pavement, equipped with the following features.

[0012] The inventors have invented a device for automatically spraying chemicals onto concrete pavement, thereby enabling the spraying of chemicals onto large areas of concrete pavement in a very short period of time.

[0013] 《Aspect 2》 The concrete pavement chemical spraying device according to embodiment 1, wherein the chemical is a surface treatment agent for concrete pavement.

[0014] When surface treatment agents are sprayed using an automated spraying device, they can be sprayed at a significantly higher speed than when sprayed manually, for example, about 10 times faster. As a result, when spraying surface treatment agents over large areas such as airports, the application process can be completed in a particularly short time.

[0015] 《Aspect 3》 The concrete pavement chemical spraying device according to Embodiment 1, wherein the spraying means has a plurality of spraying nozzles, and the plurality of spraying nozzles are arranged in a direction substantially perpendicular to the direction of travel.

[0016] By arranging multiple spray nozzles for the chemical agent in a direction approximately perpendicular to the direction of travel, i.e., horizontally, a larger area of ​​surface treatment agent can be sprayed in a single pass.

[0017] Appearance 4 The concrete paving agent spraying device according to embodiment 1, wherein the agent is a curing agent for concrete paving.

[0018] By simply modifying a chemical spraying device for spraying a surface treatment agent, it can be used as a curing agent spraying machine, thereby greatly reducing the manual work when spraying the curing agent.

[0019] 《Aspect 5》 The chemical spraying device for concrete paving according to Aspect 4, wherein the spraying means is movable in a direction substantially perpendicular to the traveling direction.

[0020] When spraying the curing agent, since the concrete is in an uncured state, the traveling means cannot travel on the concrete. In this case, while spraying the chemical from above the uncured concrete, the traveling means needs to travel on a passage outside the uncured concrete. In this case, it is preferable that the spraying means moves in a direction substantially perpendicular to the traveling direction, that is, moves horizontally, so that the curing agent can be sprayed over the entire width direction of the uncured concrete between the traveling means of the device.

[0021] 《Aspect 6》 The chemical spraying device for concrete paving according to Aspect 5, wherein the spraying means has a plurality of spraying nozzles, and the plurality of spraying nozzles are arranged substantially parallel to the traveling direction.

[0022] By arranging a plurality of chemical spraying nozzles in parallel with the traveling direction, a larger area of the curing agent can be sprayed for a single horizontal movement by the spraying means.

[0023] 《Aspect 7》 The chemical spraying device for concrete paving according to Aspect 4, further comprising a joint forming cutter and a lifting means for lifting and lowering the joint forming cutter.

[0024] By providing the chemical spraying device with a joint forming cutter, joints for preventing unintended cracking of the concrete can also be automatically formed, and joints can be formed in the concrete paving in a short period of time without much manual labor. 《Aspect 8》 A concrete pavement chemical spraying device according to Embodiment 6, wherein the spraying means is removable and the spraying means according to Embodiment 3 can be attached to it.

[0025] This chemical spraying device is extremely useful because, by simply changing the spraying mechanism, it is possible to spray both curing agents and surface treatment agents. 《Aspect 9》 A step of applying a curing agent to an unhardened concrete pavement using a concrete pavement chemical spraying device described in Embodiment 4, and The process involves spraying a surface treatment agent onto a concrete pavement that has been hardened by spraying the aforementioned curing agent using the concrete pavement chemical spraying device described in Embodiment 2. A method for constructing concrete pavement, including [specific details omitted].

[0026] This construction method is extremely useful because it allows for the automated, rapid, and labor-saving construction of large-area concrete pavements. [Effects of the Invention]

[0027] According to the concrete pavement chemical spraying device and concrete pavement construction method of the present invention, chemicals can be sprayed on large areas of concrete pavement in a short period of time with minimal manpower. [Brief explanation of the drawing]

[0028] [Figure 1A] Figure 1A shows a conceptual plan view of a concrete pavement chemical spraying device of a first embodiment for spraying a surface treatment agent for concrete pavement. [Figure 1B] Figure 1B shows a conceptual front view of the concrete pavement chemical spraying device shown in Figure 1A. [Figure 2] Figure 2 shows an enlarged view of the spraying means of the concrete pavement chemical spraying device according to the first embodiment. [Figure 3A]Figure 3A shows a conceptual plan view of a concrete paving chemical spraying device of a second embodiment for spraying curing agents for concrete paving. [Figure 3B] Figure 3B shows a conceptual front view of the concrete pavement chemical spraying device shown in Figure 3A. [Figure 4] Figure 4 shows an enlarged view of the spraying means of the concrete pavement chemical spraying device of the second embodiment. [Modes for carrying out the invention]

[0029] The present invention will be specifically described using the following embodiments as examples, but the present invention is not limited thereto. Unless otherwise specified, any mechanisms, means, methods, materials, etc., known to those skilled in the art may be used. Each embodiment can be combined by those skilled in the art based on ordinary knowledge, and any configuration not specifically mentioned for each embodiment may have the same configuration as other embodiments or a configuration suitable for that embodiment.

[0030] In this specification, the vertical and vertical directions refer to the direction of gravity, respectively; the longitudinal and longitudinal directions refer to the direction of travel of the concrete pavement chemical spraying device by the traveling means; and the transverse direction refers to the direction perpendicular to the longitudinal and vertical directions. In the drawings, the X, Y, and Z directions can be considered as the transverse, longitudinal, and longitudinal directions, and the vertical and vertical directions, respectively.

[0031] 《Concrete Pavement Chemical Spraying Device: First Embodiment》 Figure 1A shows a conceptual plan view of one embodiment of a concrete pavement chemical spraying device for spraying a surface treatment agent for concrete pavement. Figure 1B shows a conceptual front view of the concrete pavement chemical spraying device of Figure 1A. Figure 2 shows an enlarged view of the spraying means of the concrete pavement chemical spraying device of Figures 1A and 1B. The surface treatment agent is a chemical agent as described in Patent Documents 1 and 2, but "for spraying a surface treatment agent" means "for a traveling means to move over hardened concrete pavement and spray," and the chemical agent to be sprayed is not limited to these surface treatment agents.

[0032] This concrete pavement chemical spraying device 100 has a frame, which is constructed by appropriately joining multiple steel pipes and holds each element of the device 100.

[0033] Specifically, the device 100 has four horizontal frames 11 to 14 that extend laterally. These horizontal frames include an upper first horizontal frame 11 and a lower first horizontal frame 13 on the front side of the device 100, and an upper second horizontal frame 12 and a lower second horizontal frame 14 on the rear side.

[0034] The device 100 has multiple vertical frames 21 to 25 that extend in the vertical direction. Specifically, at both ends in the horizontal direction, there are first vertical frames 21 and second vertical frames 22 that extend in the front-to-back direction of travel, connecting the lower first horizontal frame 13 and the lower second horizontal frame 14, and there are also multiple auxiliary vertical frames 23. The device 100 also has a tank plate-shaped frame 24 that connects the upper first horizontal frame 11 and the upper second horizontal frame 12 and supports the chemical tank 50. The device 100 also has a power supply plate-shaped frame 25 that connects the upper first horizontal frame 11 and the upper second horizontal frame 12 and supports the power supply 80.

[0035] The device 100 has a plurality of vertical frames 31 to 34 that extend in the vertical direction. Specifically, it has four vertical frames 32 that extend in the vertical direction at both ends in the horizontal direction and in the front-to-back direction, and in addition, there are a plurality of auxiliary vertical frames 33 that connect the upper first horizontal frame 11 and the lower first horizontal frame 13, or the upper second horizontal frame 12 and the lower second horizontal frame 14. Furthermore, the device 100 has a spraying means holding frame 34 that is connected to the lower second horizontal frame 14 and extends downward from the lower second horizontal frame 14 to hold the spraying means 70.

[0036] It should be noted that the illustrated embodiment is merely a conceptual diagram, and the frame can be constructed considering the strength of the device 100, the arrangement of each element, etc.

[0037] Each of the four vertical frames 32 has an internal frame 31 that moves the vertical frames 32 up and down by a hydraulic cylinder or the like. As the vertical frames 32 move up and down, the entire frame and each element held by it can move up and down. The internal frame 31 is connected to the travel mechanism 40 on its lower side.

[0038] The size of the device 100 is determined by the configuration of these frames. For example, the device 100 can have a horizontal length of approximately 3m to 10m or 4m to 8m, and a vertical length of approximately 1m to 5m or 2m to 4m.

[0039] The travel means 40 can be positioned at the four corners of the device 100. In this embodiment, the travel means 40 can move the device 100 in the positive direction of the Y-axis.

[0040] The driving means 40 includes a cover 41 that houses wheels made of iron, rubber, or the like, and a wheel control means 42 that drives the wheels. The wheel control means 42 can be composed of, for example, a driving actuator and a reduction gear that reduces the rotational speed of the output shaft of the driving actuator. The driving actuator is attached to a predetermined location on the cover 41 via the reduction gear. Note that the driving means 40 is not limited to wheels; other well-known means such as crawlers can also be used.

[0041] The chemical tank 50 contains the chemical to be sprayed. The chemical tank 50 is placed on a tank plate frame 24 that connects the upper first horizontal frame 11 and the upper second horizontal frame 12. Preferably, the chemical tank 50 has a volume of 100 liters or more, 200 liters or more, or 500 liters or more, so that the chemical can be sprayed over a large area of ​​concrete pavement without replenishing the chemical. However, a chemical replenishment vehicle or the like for supplying chemical to the tank 50 may be used together with this device 100. The chemical can be added to the chemical tank 50 through the opening 50a at the top, and the chemical can also be replenished through the opening 50a.

[0042] The chemical is supplied from the chemical tank 50 to the spraying means 70 by the chemical supply means 60.

[0043] In this embodiment, the chemical supply means 60 includes a liquid pump 61 and a flexible hose 62. The chemical supplied to the liquid pump 61 from the opening 50a at the top of the chemical tank 50 via the flexible hose 62 is further supplied via the flexible hose 62 to the connecting means 64 to the spraying means 70. The flexible hose 62 is held by an inverted L-shaped hose holder 63 that extends upward, which creates some slack in the length of the flexible hose 62. However, when the spraying means 70 does not move (embodiments in Figures 1A and 1B), there is no need to create slack in the length of the flexible hose 62, and therefore the hose holder 63 extending upward is unnecessary. However, since it is preferable that this device 100 can switch between the spraying function of a surface treatment agent and the spraying function of a curing agent simply by changing the spraying means 70, it is preferable that the surface treatment agent spraying device 100 also has a hose holder 63.

[0044] As shown in Figure 2, the spraying means 70 supplies chemicals supplied from the connecting means 64 to the flexible hose 62 of the chemical supply means 60 to a plurality of spray nozzles 72 through the piping 71. The spraying means 70 extends laterally from the device 100, and a plurality of spray nozzles 72 are arranged at approximately equal intervals in the laterally extending piping 71. By arranging a plurality of chemical spray nozzles 72 laterally, a larger area of ​​chemicals can be sprayed in a single pass.

[0045] Therefore, it is preferable that the spraying means 70 extends substantially over the entire lateral length of the device 100, and more specifically, it is preferable that it extends over a length of 50% or more, 60% or more, or 70% or more of the lateral length of the device 100. Furthermore, it is preferable that multiple spray nozzles 72 for the chemical agent are arranged along the entire lateral length of the spraying means 70. Multiple spray nozzles 72 of the spraying means 70 may also be arranged in a row in the vertical direction, but since the chemical agent can be sprayed as the device 100 moves in the vertical direction, it is also acceptable for them to be arranged in a single row in the horizontal direction.

[0046] The spray nozzle 72 can spray the chemical in a mist or shower form. Multiple spray nozzles 72 are surrounded by a windbreak 73, which prevents the chemical from being blown away by the wind and leaving areas on the concrete pavement unsprayed.

[0047] The device 100 has a power supply 80 on a power supply plate-shaped frame 25 that connects the upper first horizontal frame 11 and the upper second horizontal frame 12. In this embodiment, the power supply 80 is a diesel generator, but the power supply 80 may be another type of generator, a large-capacity battery, or a power receiving unit from an external power supply means. Although the wires are not shown in the drawings, the power supply 80 from the diesel generator is electrically connected to the control means 81, and the control means 81 is electrically connected to each element, so that the control means 81 can drive each element.

[0048] In this embodiment, the control means 81 can also function as a switchboard that receives electricity supplied from the power source 80 and transforms it to an appropriate voltage, and as a distribution board that distributes electricity to each element. The control means 81 also controls the travel means 40 and the chemical supply means 60 to move the device 100 and to determine the amount of chemical to be sprayed. For example, the control means 81 can control the travel speed and direction of the device 100 by controlling the wheel control means 42 of the four travel means 40. The control means 81 can also control the operation of the pump 61 of the chemical supply means 60 to determine the amount of chemical to be sprayed. Furthermore, the control means 81 can also move the vertical frames 32 up and down by controlling the hydraulic cylinders of the four vertical frames 32, thereby moving the spraying means 70 closer to the surface of the concrete pavement.

[0049] 《Concrete Paving Chemical Spraying Device: Second Embodiment》 Figure 3A shows a conceptual plan view of one embodiment of a concrete paving chemical spraying device for spraying a curing agent for concrete pavement. Figure 3B shows a conceptual front view of the concrete paving chemical spraying device of Figure 3A. Figure 4 shows an enlarged view of the spraying means of the concrete paving chemical spraying device of Figures 3A and 3B. Note that while the curing agent is a chemical known in this field, "for spraying a curing agent" means "for a means of travel moving along a pathway or the like outside the unhardened concrete to spray the unhardened concrete," and is not limited to curing agents.

[0050] The apparatus shown in Figures 3A and 3B can be manufactured by slightly modifying the apparatus shown in Figures 1A and 1B, and the apparatus shown in Figures 1A and 1B can also be manufactured by slightly modifying the apparatus shown in Figures 3A and 3B. In particular, after manufacturing the apparatus shown in Figures 3A and 3B, it can be used as an apparatus "for spraying surface treatment agents" simply by changing the spraying means 70.

[0051] The differences between the apparatus for spraying the curing agent shown in Figures 3A and 3B and the apparatus for spraying the surface treatment agent shown in Figures 1A and 1B will be explained below.

[0052] The main difference between the apparatus 100 shown in Figures 3A and 3B and the apparatus shown in Figures 1A and 1B is that the spraying means 70 can move back and forth laterally within the apparatus 100. Since the apparatus 100 sprays curing agent onto unhardened concrete, the traveling means 40 cannot move the spraying section and moves along the pathways outside the unhardened concrete. Therefore, the movement of the apparatus 100 itself is limited, but the spraying means 70 is made movable, so that curing agent can be sprayed over a large area even with minimal movement of the apparatus 100.

[0053] Therefore, the spraying means 70 is configured to move back and forth in the horizontal direction, and the multiple spraying nozzles 72 are arranged in a vertical direction. This allows the area over which the curing agent can be sprayed to be widened by the spraying means 70 moving horizontally just once.

[0054] The spraying means 70 preferably extends substantially over the entire length of the device 100 in the vertical direction, and more specifically, it is preferable that it extends over 50% or more, 60% or more, or 70% or more of the length of the device 100 in the vertical direction. Furthermore, it is preferable that multiple spray nozzles 72 for the chemical agent are arranged along the entire length of the spraying means 70 in the vertical direction. Multiple spray nozzles 72 of the spraying means 70 may also be arranged in a row in the horizontal direction, but since the chemical agent can be sprayed by the spraying means 70 moving back and forth in the horizontal direction, it is also acceptable for them to be arranged in a single row in the vertical direction.

[0055] Since the spraying means 70 is configured to be movable, the flexible hose 62 of the chemical supply means 60 has some length slack so that chemicals can be supplied regardless of the position of the spraying means 70 within its movable range. For this purpose, the hose holder 63 can also be configured to be rotatable. That is, in Figures 3A and 3B, the horizontal bar of the L-shaped hose holder 63, which consists of a horizontal bar and a vertical bar, is oriented in the negative direction of the X direction, but by rotating the vertical bar as the axis of rotation, the horizontal bar can be oriented in the direction of travel or in the positive direction of the X direction.

[0056] As shown in Figures 3A and 3B, the spraying means 70 is supported by a conveyor 74. The conveyor 74 is conveyed laterally by a conveying medium 76, which is a belt or chain, and a conveying medium drive unit 75, which is a motor pulley that rotates the conveying medium 76. This allows the spraying means 70 to move laterally, but the method of moving the spraying means 70 is not limited to this embodiment.

[0057] The apparatus 100 shown in Figures 3A and 3B further includes a joint-forming cutter 91 for creating joints in unhardened concrete and a lifting mechanism 92 for raising and lowering the joint-forming cutter. The joint-forming cutter 91 is also supported by the transport body 74 and can move laterally, thereby enabling the creation of long, lateral joints in the unhardened concrete.

[0058] The joint-forming cutter 91 is supported by the transport body 74 so as to be able to move up and down. This allows the tip of the joint-forming cutter 91 to move even lower than the lower part of the spraying means 70 by the lifting means 92. Therefore, when forming joints in unhardened concrete, the lifting means 92 can be used to move the tip of the joint-forming cutter 91 lower than the lower part of the spraying means 70 and reach the unhardened concrete. Also, when spraying a curing agent with the spraying means 70, the tip of the joint-forming cutter 91 can be moved to a position higher away from the unhardened concrete.

[0059] The lifting mechanism 92 can be configured, for example, by arranging two pantograph jacks vertically, so that the joint forming cutter 91 can be tilted. This allows the cutting edge of the joint forming cutter 91 to be directed perpendicular to the unhardened concrete, even on a slope.

[0060] Concrete paving construction methods The present invention provides a method for constructing concrete pavement, which includes the steps of: spraying a curing agent onto an unhardened concrete pavement using the concrete pavement chemical spraying device of the second embodiment; and spraying a surface treatment agent onto a concrete pavement that has hardened after being sprayed with the curing agent using the concrete pavement chemical spraying device of the first embodiment. Furthermore, this method may also include the step of pouring concrete onto a base layer to form an unhardened concrete pavement.

[0061] This method can be applied to large areas of concrete pavement. For example, this method can be applied to 1000m 2 More than 5000m2 Over 10,000m 2 or more, or 30,000 m 2 This can be applied to concrete pavements of the above area, for example, to airports. Concrete pavements used in airports often require particularly high heat resistance, and silicate-based surface treatment agents are frequently applied. In particular, military airports where vertical take-off and landing aircraft take off and land require high heat resistance because the concrete pavement is subjected to jet exhaust at close range from the aircraft. In this case, it is preferable that the concrete used for the pavement is also heat-resistant concrete.

[0062] Once the process of spraying the curing agent is complete, the spraying means of the pesticide spraying device of the second embodiment can be removed and the spraying means of the pesticide spraying device of the first embodiment can be attached.

[0063] The process of applying the surface treatment agent is carried out after the concrete pavement has hardened following the application of the curing agent, and can be performed a certain period of time after the curing agent has been applied, for example, three months later. By performing the process of applying the surface treatment agent using the chemical spraying device of the first embodiment, the surface treatment agent can be applied approximately 10 times faster than when applied manually. [Explanation of Symbols]

[0064] 11-14... Horizontal frame 21-25...Vertical frames 31-34... Vertical frame 40…Means of transportation 41...cover 42... Wheel control means 50... Chemical tank 50a... Upper opening 60…Means of supplying drugs 61…Liquid transfer pump 62...Hose 63...Hose holder 64...Connection means 70...Spraying means 71... Piping 72... Spray nozzle 73... Windshield 74... Carrier 75... Transport medium drive unit 76… Conveying medium 80…Power supply 81... Control means 91… Joint forming cutter 92... Lifting and lowering means

Claims

1. Frame, A means for driving the aforementioned frame, Chemical tank on the frame, A drug supply means for supplying drugs from the aforementioned drug tank, A spraying means for spraying the chemical supplied from the chemical supply means, and Control means and power supply for controlling the aforementioned driving means and drug supply means, A chemical spraying device for concrete pavement, equipped with the following features.

2. The concrete pavement chemical spraying device according to claim 1, wherein the chemical is a surface treatment agent for concrete pavement.

3. The concrete pavement chemical spraying device according to claim 1, wherein the spraying means has a plurality of spraying nozzles, and the plurality of spraying nozzles are arranged in a direction substantially perpendicular to the direction of travel.

4. The concrete paving agent spraying device according to claim 1, wherein the agent is a curing agent for concrete paving.

5. The concrete pavement chemical spraying device according to claim 4, wherein the spraying means is movable in the lateral direction.

6. The concrete pavement chemical spraying device according to claim 5, wherein the spraying means has a plurality of spraying nozzles, and the plurality of spraying nozzles are arranged substantially parallel to the direction of travel.

7. The concrete paving chemical spraying device according to claim 4, further comprising a joint-forming cutter and a lifting mechanism for raising and lowering the joint-forming cutter.

8. A concrete pavement chemical spraying device according to claim 6, wherein the spraying means is removable and the spraying means according to claim 3 can be attached to it.

9. A step of spraying a curing agent onto an unhardened concrete pavement using a concrete pavement chemical spraying device described in claim 4, and A step of spraying a surface treatment agent onto a concrete pavement that has been hardened by spraying the aforementioned curing agent using the concrete pavement chemical spraying device described in claim 2, A method for constructing concrete pavement, including [specific details omitted].

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