Spray method and spray system

Abstract

To provide a spray method and a spray system capable of preventing generation of a place where spraying is insufficient by eliminating wasting of a spray material.SOLUTION: A method for pressure-feeding at least two kinds of spray materials through feed pipes 20 and 22 from plant devices 12 and 14 and discharging a mixture of the pressure-fed spray materials from spray nozzles 24 provided at the tips of the feed pipes 20 and 22 to spray it to a body S to be sprayed comprises: a step of measuring, in advance, difference between on / off time of the plant devices 12 and 14 and discharging start / end time of the spray materials from the spray nozzles 24; and a step of controlling the operations of the spray nozzles 24 and on / off turning of the plant devices 12 and 14 on the basis of the measured difference.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a spraying method and system for spraying a fire-resistant coating material onto steel members such as beams and columns of a building. [Background technology]

[0002] Conventionally, in spraying work in which fireproof coating material such as rock wool is sprayed together with cement slurry onto steel frames such as beams and columns of a multi-storey building, a plant 1 that supplies the material is usually installed on a specified floor (e.g., a lower floor), and a material supply hose 2 is extended from the plant 1 to the construction floor (e.g., an upper floor) for construction, as shown in Figure 4. Therefore, there is a lag of the length of the hose 2 between the timing of turning on / off the plant equipment and the timing of discharging the material from the nozzle 3 that sprays.

[0003] Sprayer 4, who is working on the construction floor, takes this misalignment into account and performs spraying work by turning the plant equipment on and off with a switch at hand.

[0004] Meanwhile, as a conventional spraying system, there is known one in which a spraying operation is performed by pressure-feeding a material via a hose to a spray nozzle provided at the tip of a manipulator or a boom (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 5-302429 [Patent Document 2] JP 2001-219114 A Summary of the Invention [Problem to be solved by the invention]

[0006] As shown in Figure 4, when spraying work is performed by placing the manipulator 5 of the spraying system on the construction floor, there is a risk of wasting the sprayed material unless the operation of the manipulator 5 is timed with the start and end timing of the material discharge from the hose 2. For example, if material discharge starts before the start of the operation of the manipulator 5, or if material discharge ends after the end of the operation of the manipulator 5, the material that did not contribute to the spraying will be wasted.

[0007] In addition, there is a risk that the spraying of the target may be incomplete. For example, if the material discharge starts after the manipulator 5 starts to operate, or if the material discharge ends before the manipulator 5 ends to operate, there may be areas that are not sprayed or areas that are insufficiently sprayed.

[0008] The present invention has been made in consideration of the above, and aims to provide a spraying method and spraying system that can eliminate waste of sprayed material and prevent the occurrence of areas that are insufficiently sprayed. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems and achieve the objectives, the spraying method of the present invention comprises pressure-feeding at least two types of spraying materials from respective plant equipment through separate supply pipes, and ejecting the mixture of the pressure-feeding spraying materials from a spray nozzle provided at the end of the supply pipe to spray onto an object to be sprayed, and is characterized in that it comprises a step of measuring in advance the difference between the on / off time of the plant equipment and the start / end time of the ejection of the spraying material from the spray nozzle, and a step of controlling the operation of the spray nozzle and the on / off of the plant equipment based on the measured difference.

[0010] In addition, the spraying system of the present invention is a system in which at least two types of spraying materials are pressure-fed from each plant equipment through separate supply pipes, and the mixture of the pressure-fed spraying materials is ejected from a spraying nozzle provided at the end of the supply pipe and sprayed onto an object to be sprayed, and is characterized by having a measuring means for measuring in advance the difference between the on / off time of the plant equipment and the start / end time of the ejection of the spraying material from the spraying nozzle, and a control means for controlling the operation of the spraying nozzle and the on / off of the plant equipment based on the measured difference. Effect of the Invention

[0011] According to the spraying method of the present invention, at least two types of spraying materials are pressurized from each plant equipment through separate supply pipes, and the mixture of the pressurized spraying materials is discharged from a spray nozzle provided at the end of the supply pipe and sprayed onto the body to be sprayed.The method includes a step of measuring in advance the difference between the on / off time of the plant equipment and the start / end time of the discharge of the spraying material from the spray nozzle, and a step of controlling the operation of the spray nozzle and the on / off of the plant equipment based on the measured difference, thereby eliminating waste of spraying material and preventing the occurrence of areas that are insufficiently sprayed.

[0012] In addition, according to the spraying system of the present invention, at least two types of spraying materials are pressurized and fed from each plant equipment through separate supply pipes, and the mixture of the pressurized spraying materials is ejected from a spray nozzle provided at the end of the supply pipe and sprayed onto the object to be sprayed.The system has a measuring means for measuring in advance the difference between the on / off time of the plant equipment and the start / end time of the ejection of the spraying material from the spray nozzle, and a control means for controlling the operation of the spray nozzle and the on / off of the plant equipment based on the measured difference, thereby achieving the effect of eliminating waste of spraying material and preventing the occurrence of areas that are insufficiently sprayed. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a schematic diagram showing an embodiment of a spraying system according to the present invention. [Diagram 2] FIG. 2 is a diagram showing an embodiment of the spraying method according to the present invention. [Diagram 3] FIG. 3 is a diagram showing an embodiment of the spraying method according to the present invention. [Figure 4] FIG. 4 is a diagram showing an example of a conventional spraying method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a spraying method and a spraying system according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to these preferred embodiments.

[0015] As shown in Fig. 1, a spraying system 10 according to an embodiment of the present invention includes a plant device 12 for supplying rock wool, a plant device 14 for supplying cement slurry, and a control device 18. This system 10 pressure-feeds rock wool and cement slurry (two types of spraying materials) from the plant devices 12, 14 via separate material supply hoses 20, 22 (supply pipes), respectively, and discharges the pressure-feed mixture of rock wool and cement slurry as a fire-resistant coating material from a spray nozzle 24 at the tip of the material supply hoses 20, 22 to be sprayed onto an object S to be sprayed. The object S to be sprayed is assumed to be, for example, the surface of a steel beam.

[0016] The spray nozzle 24 is provided at the tip of a manipulator 28 mounted on a cart 26 or the like. The ends of material supply hoses 20, 22 are connected to the base of the spray nozzle 24, respectively, so that the rock wool and cement slurry pumped through the material supply hoses 20, 22, respectively, are mixed inside the spray nozzle 24. The spray nozzle 24 is capable of discharging the mixture of rock wool and cement slurry as a fire-resistant coating material.

[0017] Detection sensors 46 and 48 are installed near the spray openings in the spray nozzle 24, respectively. The detection sensor 46 is a sensor that detects the rock wool in the spray nozzle 24. When the detection sensor 46 detects that the discharge amount of rock wool passing through the spray nozzle is equal to or greater than a certain amount (arbitrary) (when the discharge amount is equal to or greater than a predetermined threshold), it outputs a sensor-on signal to enter the sensor-on state, and similarly, when the detection sensor 46 detects that the discharge amount has fallen below a certain amount (when the discharge amount is less than the threshold), it outputs a sensor-off signal to enter the sensor-off state. In other words, the sensor does not enter the sensor-on state immediately when the rock wool starts to come out of the spray nozzle, and similarly, the sensor does not enter the sensor-off state when the discharge completely stops.

[0018] The detection sensor 48 is a sensor that detects the cement slurry in the spray nozzle 24. This detection sensor 48 has a similar configuration, and when it detects that the discharge amount of the cement slurry passing through the spray nozzle is equal to or greater than a certain amount (arbitrary) (when the discharge amount is equal to or greater than a predetermined threshold), it outputs a sensor-on signal to enter the sensor-on state, and similarly when it detects that the discharge amount has fallen below the certain amount (when the discharge amount is less than the threshold), it outputs a sensor-off signal to enter the sensor-off state. In other words, the sensor does not enter the sensor-on state immediately when the cement slurry starts to come out of the spray nozzle, and similarly, the sensor does not enter the sensor-off state when the discharge completely stops.

[0019] The detection sensors 46, 48 may be any type of sensor capable of detecting the amount of rock wool-cement slurry discharged, and may be, for example, a known applied voltage type sensor consisting of a pair of electrodes. The detection sensors 46, 48 may be installed near the outlets of the material supply hoses 20, 22 in the spray nozzle 24.

[0020] The manipulator 28 has multiple motion joints 30, an arm 32, and an actuator for driving these, and is provided so as to be movable up and down, front and rear, and left and right relative to the cart 26. The arm 32 can take any posture. The spray nozzle 24 is provided so as to be able to swing relative to the tip of the arm 32. The operation of the manipulator 28 is controlled by the control device 18. By controlling the manipulator 28, the position, orientation, movement path, etc. of the spray nozzle 24 relative to the body S to be sprayed can be controlled.

[0021] The plant equipment 12 is composed of a deflocculator 34 that deflocculates rock wool, and a blower 36 that pressure-feeds the deflocculated rock wool. The rock wool that has been fed into the deflocculator 34 and deflocculated is then pressure-feed by the blower 36 through the material supply hose 20 to the spray nozzle 24. The on / off operation of the power supply for the plant equipment 12 can be controlled by the control device 18 or a user's switch operation. The power supply for the plant equipment 12 is switched on / off by transmitting an on command signal (on signal) / off command signal (off signal) from the control device 18 or a user's switch.

[0022] The plant equipment 14 is composed of an agitator 40 that mixes and agitates cement and water to produce a cement slurry, and a pump 42 that pumps the produced cement slurry. The cement slurry produced by the agitator 40 is pumped by the pump 42 through the material supply hose 22 to the spray nozzle 24, mixed with rock wool near the spray port of the spray nozzle 24, and then discharged from the spray nozzle 24. In this way, the rock wool and the cement slurry can be mixed continuously and uniformly and sprayed onto the object S to be sprayed. The on / off operation of the power supply of the plant equipment 14 can be controlled by the control device 18 or a user's switch operation. The power supply of the plant equipment 14 is switched on / off by transmitting an on command signal (on signal) / off command signal (off signal) from the control device 18 or a user's switch.

[0023] The control device 18 is a control means for controlling the operation of the manipulator 28 (spray nozzle 24) and the on / off of the power supply of the plant equipment 12, 14. The control device 18 functions as a measurement means for measuring delay times based on on / off signals to the plant equipment 12, 14 and sensor on / off signals received from the detection sensors 46, 48. Specifically, based on the on / off signals to the plant equipment 12, 14 and the sensor on / off signals from the detection sensors 46, 48, the control device 18 measures the on / off times of the plant equipment 12, 14 and the start / end times of the discharge of the rock wool-cement slurry from the spray nozzle 24. The transmission time of the on signal corresponds to the on time of the plant equipment 12, 14, and the transmission time of the off signal corresponds to the off time of the plant equipment 12, 14.

[0024] The deviation Z1 is the time difference between the ON time of the plant device 12 (the time when the ON signal is sent) and the start time of the discharge of rock wool (the time when the sensor ON signal is received). The deviation Z2 is the time difference between the OFF time of the plant device 12 (the time when the OFF signal is sent) and the end time of the discharge of rock wool (the time when the sensor OFF signal is received).

[0025] The deviation Z3 is the time difference between the ON time of the plant equipment 14 (the time when the ON signal is transmitted) and the start time of the discharge of the cement slurry (the time when the sensor ON signal is received). The deviation Z4 is the time difference between the OFF time of the plant equipment 14 (the time when the OFF signal is transmitted) and the end time of the discharge of the cement slurry (the time when the sensor OFF signal is received).

[0026] The deviations Z1 to Z4 can be measured, for example, by the following procedure. First, as shown in FIG. 2, both plant equipment 12, 14 are turned on at the same time as the measurement starts. Next, after the rock wool-cement slurry starts to come out of each spray nozzle 24, each detection sensor 46, 48 goes into a sensor-on state. After that, after a predetermined time has elapsed (for example, after N seconds (N is an arbitrary number)), both plant equipment 12, 14 are turned off at the same time. After that, after each detection sensor 46, 48 goes into a sensor-off state, the material discharge from the spray nozzle 24 stops completely. From the on / off times of the plant equipment 12, 14 in this series of operations and the start / end times of the discharge of each material, the deviations Z1 to Z4 can be measured. The on / off of the plant equipment 12, 14 in this operation may be controlled by the control device 18, or may be performed by the user by operating a switch.

[0027] Furthermore, the control device 18 adjusts the on / off timing of the plant equipment 12, 14 so that discharge from the spray nozzle 24 starts and ends in accordance with the start and end of the operation of the manipulator 28. Specifically, after setting adjustment values ​​T1-T3 based on the above-mentioned deviations Z1-Z4, the control device 18 controls operations such as turning on / off the plant equipment 12, 14 and starting / ending the operation of the manipulator 28 based on these adjustment values ​​T1-T3. The position, orientation, movement path, etc. of the spray nozzle 24 relative to the object S to be sprayed are controlled via the manipulator 28.

[0028] The adjustment value T1 is the time corresponding to the deviation Z1-the deviation Z3 (basically, the deviation Z1>the deviation Z3). The adjustment value T2 is the time corresponding to the deviation Z2, and the adjustment value T3 is the time corresponding to the deviation Z4.

[0029] Next, an example of the operation of the spray system 10 adjusted using the adjustment values ​​T1 to T3 will be described. As shown in FIG. 3, first, at the same time as the system starts, the control device 18 turns on the rock wool plant equipment 12. This starts the supply of rock wool from the plant equipment 12 to the spray nozzle 24. After that, when the time of the adjustment value T1 has elapsed, the control device 18 turns on the cement slurry plant equipment 14. This starts the supply of cement slurry from the plant equipment 14 to the spray nozzle 24. After that, both the rock wool and cement slurry detection sensors 46, 48 are simultaneously in the sensor-on state. At this point, the control device 18 starts the operation of the manipulator 28. In accordance with the start timing of this operation (or simultaneously with the start of the operation), the rock wool and cement slurry mixture is discharged from the spray nozzle 24, and the spraying operation is performed on the target body S.

[0030] After a predetermined time has elapsed, the control device 18 turns off the plant equipment 12 before the scheduled operation end time by adjustment value T2 when the operation of the manipulator 28 is to be stopped, and turns off the plant equipment 14 before adjustment value T3. Thereafter, the operation of the manipulator 28 continues to perform the spraying work until the scheduled operation end time, and the operation of the manipulator 28 ends at the same time as the scheduled operation end time is reached. In line with the end timing of this operation (or simultaneously with the end of the operation), the discharge of the rock wool-cement slurry from the spray nozzle 24 also completely ends (system end).

[0031] In this way, by controlling the start / end of the operation of the manipulator 28 and the on / off control of the plant equipment 12, 14 based on the difference between the on / off of the plant equipment 12, 14 and the material discharge measured in advance, it is possible to prevent the occurrence of a situation in which the material discharge starts before the start of the operation of the manipulator 28 or ends after the end of the operation of the manipulator 28. Therefore, according to this embodiment, it is possible to eliminate waste of the sprayed material. It is also possible to prevent the occurrence of a situation in which the material discharge starts after the start of the operation of the manipulator 28 or ends before the end of the operation of the manipulator 28. Therefore, according to this embodiment, it is ... an insufficiently sprayed portion.

[0032] In the above embodiment, the case where two types of spraying materials (rock wool-cement slurry) are pumped from the plant equipment 12, 14 through separate supply pipes has been described as an example, but the present invention is not limited to this, and three or more types of spraying materials may be pumped from the plant equipment through separate supply pipes. Even in this case, the same effects as those described above can be achieved.

[0033] As described above, according to the spraying method of the present invention, at least two types of spraying materials are pressurized and fed from each piece of plant equipment through separate supply pipes, and the mixture of the pressurized spraying materials is ejected from a spray nozzle provided at the end of the supply pipe and sprayed onto the object to be sprayed.The method includes a step of measuring in advance the difference between the on / off time of the plant equipment and the start / end time of the ejection of the spraying material from the spray nozzle, and a step of controlling the operation of the spray nozzle and the on / off of the plant equipment based on the measured difference, thereby eliminating waste of spraying material and preventing the occurrence of areas that are insufficiently sprayed.

[0034] In addition, according to the spraying system of the present invention, at least two types of spraying materials are pressurized and fed from each plant equipment through separate supply pipes, and the mixture of the pressurized spraying materials is ejected from a spray nozzle provided at the end of the supply pipe and sprayed onto the object to be sprayed.The system has a measuring means for measuring in advance the difference between the on / off time of the plant equipment and the start / end time of the ejection of the spraying material from the spray nozzle, and a control means for controlling the operation of the spray nozzle and the on / off of the plant equipment based on the measured difference, thereby eliminating waste of spraying material and preventing the occurrence of areas that are insufficiently sprayed.

[0035] The "Sustainable Development Goals (SDGs)" are 17 international goals that were adopted at the United Nations Summit in September 2015. The spraying method and spraying system according to the present embodiment can contribute to the achievement of, for example, goal 8. "Decent work and economic growth" out of the 17 SDGs. [Industrial Applicability]

[0036] As described above, the spraying method and spraying system of the present invention are useful for spraying fire-resistant coating materials, and are particularly suitable for eliminating waste of sprayed material and preventing the occurrence of areas that are insufficiently sprayed. [Explanation of symbols]

[0037] 10 Spraying System 12,14 Plant equipment 18 Control device (control means, measurement means) 20, 22 Material supply hose (supply pipe) 24 Spray nozzle 26 Trolley 28 Manipulator 30 Movement Joints 32 Arm 34 Cotton opening machine 36 Blower 40 Mixer 42 Pump 46,48 Detection sensor S: Object to be sprayed

Claims

1. A method for spraying at least two types of spray materials from respective plant equipment through separate supply pipes, and discharging a mixture of the spray materials from a spray nozzle provided at the tip of the supply pipes to spray the mixture onto an object to be sprayed, comprising the steps of: A spraying method characterized by comprising a step of measuring in advance the difference between the on / off time of the plant equipment and the start / end time of the discharge of the spray material from the spray nozzle, and a step of controlling the operation of the spray nozzle and the on / off of the plant equipment based on the measured difference.

2. A system in which at least two types of spraying materials are pressure-fed from respective plant equipment through separate supply pipes, and a mixture of the pressure-fed spraying materials is discharged from a spray nozzle provided at the tip of the supply pipe and sprayed onto an object to be sprayed, A spraying system characterized by having a measuring means for measuring in advance the difference between the on / off time of the plant equipment and the start / end time of the spray material being discharged from the spray nozzle, and a control means for controlling the operation of the spray nozzle and the on / off of the plant equipment based on the measured difference.

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