Method for spraying spraying materials

Abstract

To provide a method of spraying a spraying material that eliminates or reduces an operation of a skilled operator.SOLUTION: In a method of spraying a spraying material using a spraying device 1 that has a pressurized container 3B to which a spraying material is supplied, an air path 2B for blowing pressurized air into the pressurized container 3B, and one or more conveying paths 8 for conveying the spray material discharged from the pressurized container 3B, and comprises an air flow meter 11, a pressure gauge 12, and air flow adjustment means 13 in each of the air path 2B and the conveying path 8, the air flow adjustment means 13 is controlled based on the measured value of the air flow meter 11 in the air path 2B and the conveying path 8. When the measured value of the pressure gauge 12 of at least one of the air path 2B and the conveying path 8 exceeds a predetermined value, the spraying of the spraying material is stopped.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for spraying a spray material. [Background technology]

[0002] Conventionally, there has been a spraying method of spraying materials such as mortar, concrete, and greening base materials, which is carried and sprayed by compressed air (see, for example, Patent Document 1). In this type of method, for example, as shown in Fig. 2, a spraying device 50 having an air passage 52 connected to a compressor 51 is used.

[0003] This spraying device 50 has an upper pressurized container 53 to which the spray material is supplied from a hopper 55 or the like via an upper slide valve 56, and a lower pressurized container 54 which is connected to the upper pressurized container 53 via a lower slide valve 57. In this spraying device 50, the upper pressurized container 53 is provided with an upper agitating means 53A, and the lower pressurized container 54 is provided with a lower agitating means 54A. In this regard, in this spraying device 50, the upper agitating means 53A and the lower agitating means 54A are configured to be driven in conjunction with each other by a drive source M such as a motor. In addition, the bottom of the lower pressurized container 54 is provided with a discharge outlet 59 for the spray material. A conveying path 58 which is connected to the air path 52 is connected to this discharge outlet 59, and pressurized air is configured to flow through the air path 52. Incidentally, the air passage 52 is also connected to the upper pressurization vessel 53 and the lower pressurization vessel 54, and pressurized air is blown into the upper pressurization vessel 53 and the lower pressurization vessel 54. In this spraying device 50, the spray material is supplied from a hopper 55 into the upper pressurization vessel 53. The spray material supplied into the upper pressurization vessel 53 is agitated in the upper pressurization vessel 53 by agitation means 53A.

[0004] The spray material stirred in the upper pressurized container 53 is transferred into the lower pressurized container 54 when the lower slide valve 57 changes from a closed state to an open state, while the upper pressurized container 53 and the lower pressurized container 54 are at approximately the same pressure. The spray material stirred in the lower pressurized container 54 is further stirred in the lower pressurized container 54, and is discharged into the conveying path 58 from a discharge port 59 provided on the bottom surface of the lower pressurized container 54. The spray material discharged into the conveying path 58 is pressure-fed toward the object to be sprayed by the pressurized air flowing inside the conveying path 58, and is sprayed toward the object to be sprayed from a nozzle or the like provided at the tip of the conveying path 58.

[0005] Although there are no problems with the spraying quality of this conventional spraying device 50 or the spraying method using this spraying device 50, there is a drawback in that the operation is complicated. That is, in conventional spraying methods using this type of spraying device 50, an operator manually adjusted the amount of pressurized air (air volume) sent to the upper pressurized container 53, the lower pressurized container 54, the conveying path 58, etc. For example, if the amount of spray material being discharged from the nozzle or the like is decreasing, the operator would determine that the conveying path 58 is blocked and manually close a gate valve or the like that adjusts the air volume. Furthermore, this judgment and operation by the operator requires extremely high skill, and adjustments are particularly difficult when the conveying path 58 consists of multiple lines. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-056851 Summary of the Invention [Problem to be solved by the invention]

[0007] The problem to be solved by the present invention is to provide a spraying method of spraying materials that does not require or can reduce the operation of a skilled operator. [Means for solving the problem]

[0008] The means for solving the above problems are as follows. (Invention described in claim 1) a pressurized container into which the spray material is supplied; an air passage for blowing pressurized air into the pressurized container; One or more conveying paths for conveying the spraying material discharged from the pressurized container; A method for spraying a spray material using a spraying device equipped with an air flow meter, a pressure meter, and an air volume adjusting means in each of the air path and the conveying path, comparing a first measurement value, which is a measurement value of a pressure gauge provided in the air passage, with a second measurement value, which is a measurement value of a pressure gauge provided in the conveying passage; Control the first measurement value / second measurement value to be 1.00 to 1.25 death , a spraying device having an upper pressurizing container consisting of one container or an upper pressurizing container consisting of two or more containers connected in series and a lower pressurizing container connected to the upper pressurizing container, and a stirring means provided in each of the upper pressurizing container and the lower pressurizing container; The stirring means in the lower container is configured to be driven separately by a separate drive source different from the drive source in the upper container, In the upper pressurizing vessel and the lower pressurizing vessel, the agitating means therein is controlled independently based on the measured values ​​of the airflow meter and the pressure meter corresponding to the pressurizing vessel. A method for spraying a spray material.

[0009] (Invention described in claim 2) In the air path and the conveying path, the air volume adjusting means is controlled based on the measurement value of the air volume meter, When the measured value of the pressure gauge of at least one of the air path and the conveying path exceeds a predetermined value, the spraying of the spray material is stopped. A method for spraying the spray material according to claim 1.

[0010] [Effects of the Invention]

[0011] According to the present invention, a spraying method of spraying materials is provided that eliminates or reduces the need for operations by skilled operators, etc. [Brief explanation of the drawings]

[0012] [Figure 1]FIG. 1 is an explanatory diagram of the spraying device and spraying method of the present embodiment. [Figure 2] FIG. 1 is an explanatory diagram of a conventional spraying device and spraying method. DETAILED DESCRIPTION OF THE INVENTION

[0013] Next, an embodiment of the present invention will be described. Note that this embodiment is an example of the present invention, and the scope of the present invention is not limited to the scope of this embodiment.

[0014] FIG. 1 shows an explanatory diagram of the spraying method of the spray material according to this embodiment. In the method of this embodiment, spraying is performed using a spraying device 1 connected to a compressor or the like (not shown). This spraying device 1 has a pressurized container consisting of an upper pressurized container 3A and a lower pressurized container 3B located below the upper pressurized container 3A.

[0015] An upper opening / closing gate 4A is provided on the top of the upper pressurized vessel 3A, and spraying material is supplied into the upper pressurized vessel 3A from a hopper or the like through this upper opening / closing gate 4A. The upper pressurized vessel 3A and the lower pressurized vessel 3B are connected via the lower opening / closing gate 4B, and the spraying material can be moved from the upper pressurized vessel 3A into the lower pressurized vessel 3B.

[0016] The upper pressurized vessel 3A is provided with an upper stirring means 5A for stirring and, if necessary, mixing the spray material, and the lower pressurized vessel 3B is provided with a lower stirring means 5B for stirring and, if necessary, mixing the spray material. The upper stirring means 5A and the lower stirring means 5B are composed of, for example, screw blades, T-shaped blades, etc.

[0017] In this regard, the upper stirring means 5A and the lower stirring means 5B can be configured to work in conjunction as in conventional spraying devices, but in this embodiment, the upper stirring means 5A is driven by a driving source 6A such as a motor, while the lower stirring means 5B is driven by a separate driving source 6B such as a motor that is different from the driving source 6A.

[0018] Meanwhile, pressurized air is blown into the upper pressurized vessel 3A via air passage 2A, and pressurized air is blown into the lower pressurized vessel 3B via air passage 2B. In this embodiment, air passage 2A and air passage 2B merge (combine) upstream and are connected to a compressor or the like. However, air passage 2A and air passage 2B may each be connected to a compressor or the like.

[0019] The air passage 2A is a flow path for blowing pressurized air into the upper pressurized vessel 3A, and the upper pressurized vessel 3A may need to be rapidly pressurized. Therefore, in this embodiment, the air passage 2A is provided with a rapid air passage 2C that is parallel to the air passage 2A.

[0020] The spraying device 1 of this embodiment further has one or more, in this embodiment two, conveying paths 8 for conveying the spray material discharged from the lower pressurized container 3B. This conveying path 8 is in communication with the lower pressurized container 3B via a spray material outlet 7 provided at the bottom (particularly the bottom surface) of the lower pressurized container 3B. The conveying path 8 also merges (unifies) with the air paths 2A and 2B upstream, and is configured so that pressurized air from a compressor or the like flows through the conveying path 8. In this regard, the conveying path 8 can also be connected to a compressor or the like separately from the air paths 2A and 2B without merging with the air paths 2A and 2B.

[0021] Each of the air passage 2B and the conveying passage 8 is provided with an air flow meter 11, a pressure meter 12, and an air flow adjusting means 13. Each of the air passages 2A, 2B, 2C and the conveying passage 8 is provided with a manual valve 14 and an on-off valve 15, respectively.

[0022] In the spraying apparatus 1 of this embodiment, first, spraying materials such as mortar, concrete, and greening materials are supplied from a hopper or the like into the upper pressurized vessel 3A. The spraying materials supplied into the upper pressurized vessel 3A are stirred and mixed, if necessary, by the stirring means 5A within the upper pressurized vessel 3A. The spraying materials stirred in the upper pressurized vessel 3A move into the lower pressurized vessel 3B when the lower opening / closing gate 4B switches from a closed state to an open state while the upper pressurized vessel 3A and the lower pressurized vessel 3B are at similar pressures (e.g., 0.40 to 0.65 MPa). The spraying materials moved into the lower pressurized vessel 3B are further stirred and mixed within the lower pressurized vessel 3B and are discharged into the conveying path 8 from the discharge port 7 at the bottom of the lower pressurized vessel 3B. This discharge is facilitated by the pressure of the pressurized air blown into the lower pressurized vessel 3B through the air path 2B. The spray material discharged into the conveying path 8 is pressurized toward the object to be sprayed by the pressurized air flowing within the conveying path 8, and is sprayed toward the object to be sprayed from a nozzle or the like (not shown) provided at the tip of the conveying path 8.

[0023] In this embodiment, the movement of the spray material is promoted by the pressurized air from air path 2B and the pressurized air flowing through conveying path 8 as described above, but in air path 2B and conveying path 8, air volume adjustment means 13 is automatically controlled based on the measurement value of air volume meter 11. Therefore, with the spraying device 1 of this embodiment, there is no need for a skilled operator to control the air volume. Furthermore, when the measurement value of the pressure meter 12 of at least one of air path 2B and conveying path 8, preferably both, exceeds a predetermined value, the spraying of the spray material is automatically stopped. In this respect, the spraying device 1 of this embodiment does not require control by a skilled operator, and is therefore very safe.

[0024] The predetermined value is a preset pressure that is expected when the transport path 8, the nozzle, or the like is blocked, and is, for example, 0.69 to 0.70 MPa.

[0025] More preferably, a first measurement value, which is the measurement value of the pressure gauge 12 provided in the air passage 2B, is compared with a second measurement value, which is the measurement value of the pressure gauge 12 provided in the conveying passage 8, and the first measurement value / second measurement value is controlled to be 1.00 to 1.25, preferably 1.00 to 1.20. According to this embodiment, the spray material is reliably discharged from the lower pressurized container 3B to the conveying passage 8, there is no possibility of backflow, etc. occurring, and there is also no possibility of blockage of the conveying passage 8 being overlooked.

[0026] In this embodiment, the pressurizing container comprises an upper pressurizing container 3A consisting of one container and a lower pressurizing container 3B that communicates with the upper pressurizing container 3A. However, the pressurizing container may consist of only the lower pressurizing container 3B, or may consist of two or more upper pressurizing containers 3A.

[0027] Furthermore, when the pressurized container is configured with a plurality of pressurized containers 3A, 3B as in this embodiment, it is preferable to control the agitation means 5A, 5B in each pressurized container individually based on the measurement values ​​of the airflow meter 11 and the pressure meter 12 corresponding to each pressurized container. This embodiment ensures reliable agitation in each pressurized container. This consideration is difficult to achieve with conventional manual control, and is unique to the method of this embodiment. [Industrial Applicability]

[0028] It can be used as a spraying method for spraying materials such as mortar, concrete, and greening substrates. [Explanation of symbols]

[0029] 1. Spraying equipment 2A, 2B, 2C air passages 3A, 3B Pressurized vessel 4A, 4B Opening and closing gate 5A,5B Stirring means 6A, 6B drive source 8 Conveyor path 11 Air flow meter 12 Pressure gauge 13 Air volume adjustment means 14 Manual valve 15 On-off valve

Claims

1. a pressurized container into which the spray material is supplied; an air passage for blowing pressurized air into the pressurized container; One or more conveying paths for conveying the spraying material discharged from the pressurized container; A method for spraying a spray material using a spraying device equipped with an air flow meter, a pressure meter, and an air volume adjusting means in each of the air path and the conveying path, comparing a first measurement value, which is a measurement value of a pressure gauge provided in the air passage, with a second measurement value, which is a measurement value of a pressure gauge provided in the conveying passage; Controlling the ratio of the first measurement value to the second measurement value to be 1.00 to 1.25; a spraying device having, as the pressurizing container, an upper-stage pressurizing container consisting of one container or an upper-stage pressurizing container consisting of two or more containers connected in series and a lower-stage pressurizing container connected to the upper-stage pressurizing container, and a stirring means provided in each of the upper-stage pressurizing container and the lower-stage pressurizing container; The stirring means in the lower container is configured to be driven separately by a separate drive source different from the drive source in the upper container, In the upper pressurizing vessel and the lower pressurizing vessel, the agitating means therein is controlled independently based on the measured values ​​of the airflow meter and the pressure meter corresponding to the pressurizing vessel. A method for spraying a spray material.

2. In the air path and the conveying path, the air volume adjusting means is controlled based on the measurement value of the air volume meter, When the measured value of the pressure gauge of at least one of the air path and the conveying path exceeds a predetermined value, the spraying of the spray material is stopped. A method for spraying the spray material according to claim 1.

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