JP2016016459A - Blast device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blast device which is easily handled during work and does not make an operator feel that the handling is troublesome.SOLUTION: A blast device includes: a first intake port 12 for taking in compression gas supplied from the outside; a particulate matter tank 3 having a first introduction port 38 for introducing the compression gas into a space 25, and a first lead-out port 39 for leading out mixture gas containing a particulate matter 26 in the space 25; and a liquid tank 4 for storing liquid. A spray nozzle 5 includes: a first cylinder 61 having a first inflow port 67 through which the mixture gas flows in, a first outlet port 68 through which the mixture gas is blown out, and a first transfer passage 69; and a second cylinder 62 having a second inflow port 70 in which the first cylinder 61 is disposed inside and through which the liquid flows in, a second outlet port 71 through which the liquid is blown out, and a second transfer passage 72. When the mixture gas is blown out from the first outlet port 68, negative pressure is generated in the second outlet port 71, the second transfer passage 72, and the second inflow port 70 according to a venturi effect so that the liquid inside the liquid tank 4 is sucked and the liquid is blown out from the second outlet port 71.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a blasting apparatus that sprays powder particles onto a surface to be processed to perform cleaning, rust removal, and the like on the surface to be processed.

  A blasting apparatus has been conventionally used as an apparatus for performing surface treatment of a workpiece. Examples of the surface treatment performed by the blasting apparatus include removal of paint, coating, scale, rust, dirt, burrs and the like covering the outer surface of the workpiece. A blasting apparatus that performs such surface treatment generally pumps a granular material called an injection medium with a driving fluid such as air or water, accelerates it, and then injects it toward the outer surface of the workpiece. Thus, the outer surface paint or the like is removed.

  As a conventionally known blasting apparatus, for example, a user is provided with a gripping part for gripping the blasting apparatus and a nozzle for ejecting an ejection medium, and is supplied from a compressed air source outside the blasting apparatus. Air is taken in, and the jetting medium of the granular material is pumped toward the tip of the nozzle by this compressed air, and jetted from the tip of the nozzle toward the outer surface of the workpiece (Patent Document 1). In addition, the blast device described in Patent Document 1 is configured to inject a jet medium that is pumped by this air flow and to form a water film so as to surround the jetted jet medium. Yes. In the case of the blast device described in Patent Document 1, the compressed air, the injection medium, and the water are all supplied from an external supply source.

JP 2003-080462 A

  As described above, the conventional blasting apparatus including the blasting apparatus described in Patent Document 1 described above is necessary for injecting toward the outer surface of the workpiece such as compressed air, an injection medium, and water. Various types of media are supplied from each supply source outside the blasting apparatus. Therefore, the blasting device is supplied from a supply source such as a pipe for taking in compressed air supplied from a supply source of compressed air, a pipe for taking in the injection medium supplied from the supply source of the injection medium, and water. Each pipe for taking in each medium is connected like a pipe for taking in water. Therefore, the conventional blasting device tends to have a large-scale configuration, and the user tends to be troublesome at the time of handling such that each pipe is tangled when used. In particular, when using a blasting device, it is often the case that fine parts are processed, so that it is difficult to perform fine work if handling is poor, and there is a problem that the troublesomeness felt by the operator becomes larger. It was.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a blasting device that is easy to handle at the time of work and does not cause the operator to feel bothered.

The present invention
(1) A blasting apparatus for processing a surface to be processed by injecting a mixed gas and liquid containing an injection medium from the tip of an injection nozzle, and an intake port for taking in compressed gas supplied from an external compressed gas source; An inlet for introducing the compressed gas into the storage space; and an outlet for introducing the mixed gas containing the injection medium in the storage space. And a liquid tank that stores the liquid. The injection nozzle includes a first inlet through which the mixed gas flows, a first outlet through which the mixed gas is ejected, and the first flow. A first cylinder having a first transfer path formed between an inlet and the first outlet; the first cylinder is formed larger than the first cylinder, and the first cylinder is disposed inside; 2nd inlet into which A second outlet having a second transfer path formed between the second outlet from which the liquid is ejected and the second inlet and the second outlet, and radially outside the outer peripheral surface of the first cylinder; The liquid tank by generating a negative pressure at the second outlet, the second transfer path and the second inlet by a venturi effect when the mixed gas is ejected from the first outlet. A blasting apparatus configured to suck the liquid inside and to eject the sucked liquid from the second outlet,
(2) A third inlet into which the compressed gas supplied from a compressed gas source flows, the first cylinder and the second cylinder being formed larger than the second cylinder, and the compression A third outlet having a third transfer path formed between the third outlet and the third outlet and the third outlet from which gas is ejected and radially outward from the outer peripheral surface of the second cylinder. The blasting device according to (1) above, comprising a cylindrical body;
(3) The blast device according to (2), wherein the first cylinder is disposed inside the third cylinder such that the first outlet is located inside the third cylinder.
(4) In the second transfer path, the first spacer member for maintaining a predetermined distance between the outer peripheral surface of the first cylinder and the inner peripheral surface of the second cylinder is disposed (1) ) To (3),
(5) The blast device according to the above (4), wherein the first spacer member is formed with a first notch for allowing passage of the mixed gas passing through the first transfer path,
(6) In the third transfer path, the second spacer member for maintaining the distance between the outer peripheral surface of the second cylinder and the inner peripheral surface of the third cylinder at a predetermined dimension is disposed (2 ) To (5),
(7) The blasting device according to (6), wherein the second spacer member is formed with a second notch for allowing passage of compressed gas passing through the second transfer path,
Is the gist.

  According to the present invention, it is possible to reduce the number of pipes connected to an external supply source, thereby facilitating handling of the blasting apparatus. Therefore, according to the present invention, it is possible to perform an operation without feeling troublesome for an operator at a narrow place or when processing a fine portion.

It is sectional drawing showing the structure of the blasting apparatus which concerns on this invention. It is a partial expanded sectional view of the location where the granular material tank is connected. FIG. 3A is a perspective view of the first spacer member, and FIG. 3B is a perspective view of the second spacer member. It is the sectional view on the AA line of FIG. It is explanatory drawing for demonstrating the medium conveyed by the 1st transfer path, 2nd transfer path, and 3rd transfer path of an injection nozzle, and each of these transfer paths. It is a partial expanded sectional view of the location in which the base member of the injection nozzle is provided.

  The structure of the blasting apparatus 1 according to the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view showing a configuration of a blasting apparatus 1 according to the present invention. In the present specification, “upstream side” means a side into which compressed air as compressed gas flows, and “downstream side” means a side from which compressed air flows out. Further, in this specification, the “front end” means an end portion on the side where compressed air is injected in the blast device 1, that is, an end portion in the a direction in FIG. 1, and the “rear end” means the blast device 1. Means the end opposite to the tip, that is, the end in the direction b in FIG.

[Configuration of Blasting Device 1]
As shown in FIG. 1, the blast apparatus 1 includes an operation unit 2, a powder tank 3 as an injection medium tank, a liquid tank 4, and an injection nozzle 5. These are arranged in this order from the rear end side to the front end side of the blasting apparatus 1 in the order of the operation unit 2, the powder tank 3, and the injection nozzle 5, and the liquid tank 4 is attached near the rear end of the injection nozzle 5. It has been. The operation unit 2, the powder particle tank 3, and the spray nozzle 5 constitute the powder particle tank 3, the position of the first discharge port 13 of the first transfer unit 7, which will be described later, formed in the operation unit 2. The positions of the second intake port and the third discharge port, which will be described later, and the positions of the first inlet port 67 and the first outlet port 68, which will be described later, constituting the injection nozzle 5, are assembled.

[Configuration of operation unit 2]
The operation unit 2 includes a gripping unit 6, a first transfer unit 7, a second transfer unit 8, a first connection unit 9, a second connection unit 10, and a third connection unit 11. The grip 6 is for gripping when the user uses the blasting device 1. The shape of the gripping portion 6 is not particularly limited, but it is preferable that the gripping portion 6 be easily gripped when the user uses the blasting device 1. In the present embodiment, the shape of the rear end side of the gripping part 6 has a curved line, and the shape of the front end side of the gripping part 6 is formed by combining the curve and the straight line, but it is easy for the user to grip. If it is a shape, it is not limited to this.

  The first transfer unit 7 and the second transfer unit 8 are formed inside the grip unit 6. The first transfer unit 7 and the second transfer unit 8 are for transferring compressed air as compressed gas supplied from an external compressed air source. The 1st transfer part 7 has the 1st discharge port 13 which discharges the compressed air taken in from the 1st intake 12 and the 1st intake 12 which take in compressed air supplied from the outside to the outside. . The second transfer unit 8 branches from a predetermined position of the first transfer unit 7 in the gripping unit 6 and discharges a part of the compressed air taken in from the first intake port 12 to the outside. 14. That is, a part of the compressed air taken in from the first intake port 12 is diverted to the second transfer unit 8 while passing through the first transfer unit 7, and the first discharge port 13 and the second discharge port 14 is discharged.

  The adjustment lever 15 is for adjusting the flow rate of the compressed air transferred through the first transfer part 7 at a predetermined position of the first transfer part 7 upstream from the point where the second transfer part 8 branches. It is. The adjustment lever 15 is provided on the distal end side of the grip portion 6 and is configured to be rotated by a predetermined angle around a rotation shaft (not shown). For example, when the user operates the adjustment lever 15, the adjustment lever 15 rotates by a predetermined angle around the rotation axis. The flow rate of the compressed air in the first transfer unit 7 is adjusted by the rotation amount of the adjustment lever 15. As the configuration of the adjusting lever 15 and the configuration relating to the adjustment of the discharge amount of the compressed air by the adjusting lever 15, a conventionally known one may be arbitrarily used.

  The first connection portion 9 is formed on the upstream end side of the first transfer portion 7, that is, in the vicinity of the first intake port 12, and from a compressed air supply source (not shown) outside the blast device 1. It forms so that it can connect with the hose H etc. which transfer the compressed air supplied. As the configuration of the first connection portion 9, a conventionally known configuration may be arbitrarily selected and used. For example, the first connection portion 9 has a male screw thread formed on the outer periphery, and a tip of a hose H or the like. It may be configured such that it can be connected to the connector C provided in the connector, or may be configured in other ways.

  The 2nd connection part 10 is formed in the downstream end side of the 1st transfer part 7, ie, the vicinity of the 1st discharge port 13, and can connect with the 1st to-be-connected part 30 mentioned later of the granular material tank 3. It is formed to be able to. The second connecting portion 10 only needs to be connected to the first connected portion 30 and may be arbitrarily selected from known shapes. For example, the second connecting portion 10 can be formed in a male screw shape, the first connected portion 30 can be formed in a female screw shape, and the second connecting portion 10 and the first connected portion 30 can be connected. It may be formed, or a configuration other than this may be used.

  The third connection portion 11 is formed on the downstream end side of the second transfer portion 8, that is, in the vicinity of the second discharge port 14, and the compressed air transferred through the second moving portion is the second of the bypass pipe line 51 described later. 3 It is formed so that it can be connected to the connected portion 55. The third connecting portion 11 only needs to be connected to the third connected portion 55, and a conventionally known shape may be arbitrarily selected and used. For example, the third connecting portion 11 can be formed in a male screw shape, the third connected portion 55 can be formed in a female screw shape, and the third connecting portion 11 and the third connected portion 55 can be connected. It may be formed, or a configuration other than this may be used.

[Configuration of the powder tank 3]
As shown in FIG. 1, the powder tank 3 is attached and fixed to the tip of the operation unit 2. As shown in FIG. 2, the powder tank 3 includes a tank body 21 and a connection body 22. The tank body 21 has an attachment fixing portion 23 and an opening 24. Further, the tank body 21 has a space 25 formed therein, and is configured so that the powder particles 26 can be stored in the space 25. The attachment fixing part 23 is for attaching and fixing the connection body 22, and the configuration thereof is not limited as long as the connection body 22 can be attached and fixed.

  A predetermined amount of granular material 26 is stored inside the tank body 21. Examples of the powder body 26 include water-soluble materials such as sodium hydrogen carbonate, sodium sesquicarbonate, sodium carbonate, sodium chloride, potassium hydrogen carbonate, potassium bicarbonate, and the like, but it is preferable to use sodium hydrogen carbonate.

  The connection body 22 is for connecting the powder body tank 3 with the operation part 2 and the injection nozzle 5. The connection body 22 includes an inflow path 27 and an outflow path 28, an attachment portion 29, a first connected portion 30, and a second connected portion 31. In addition, the connection body 22 is provided with an introduction pipe 32 and a discharge portion 33.

  The inflow path 27 is a path for allowing compressed air supplied by being transported through the first transport section 7 of the operation section 2 to flow into the powder tank 3. The inflow path 27 includes a first transfer section inlet 34 for allowing the compressed air transferred through the first transfer section 7 to flow in, and a first transfer for discharging the compressed air flowing in from the first transfer section inlet 34. And a partial outlet 35. In addition, the outflow path 28 includes a second transfer portion inlet 36 into which a mixed gas that is a mixture of compressed air and powder particles 26 flowing in from the tank body 21 flows, and an inflow from the second transfer portion inlet 36. And a second transfer section outlet 37 through which the mixed gas flows out.

  The attachment portion 29 is formed so that it can be attached to the attachment fixing portion 23 of the tank body 21. The attachment portion 29 only needs to be able to be closed in a state where the inside of the tank main body 21 is sealed when attached to the attachment fixing portion 23, and the configuration thereof may be arbitrarily selected and used conventionally. For example, the mounting and fixing portion 23 of the tank body 21 forms a male screw-like thread, and the mounting portion 29 of the connecting body 22 forms a female screw-like screw thread corresponding to the mounting and fixing portion 23. Thus, the attachment fixing portion 23 and the attachment portion 29 may be configured to be fixed, or other configurations may be employed.

  The first connected portion 30 is formed at an end portion on the rear end side of the connection body 22. The first connected part 30 is formed so as to be connected to the second connecting part 10 of the operation part 2. The first connected portion 30 is only required to be connected to the second connecting portion 10, and a conventionally known one may be arbitrarily selected and used. For example, as described above, a thread of a male screw is formed on the outer periphery of the second connection portion 10, and a thread of a female screw is formed on the inner periphery of the first connected portion 30. 10 and the 1st to-be-connected part 30 may be comprised, and the structure of other than this may be sufficient.

  The second connected portion 31 is formed at the end portion on the front end side of the connection body 22. The second connected portion 31 is formed so as to be connected to the third connecting portion 11 formed in the injection nozzle 5. The second connected portion 31 is only required to be connected to the third connecting portion 11, and a conventionally known one may be arbitrarily selected and used. For example, a male screw thread is formed on the outer periphery of the third connection portion 11, and a female screw screw thread is formed on the inner periphery of the second connected portion 31. The connected portion 31 may be configured to be connected, or may be configured other than this.

  The introduction pipe 32 is a tubular member having a first introduction port 38 and a first outlet port 39. The introduction pipe 32 is provided in the connection body 22 so that the first introduction port 38 and the first outlet port 39 communicate with each other. The introduction pipe 32 has a discharge fixing portion 40 for attaching and fixing the other end portion of a spring member 44 described later of the discharge portion 33 to the lower portion. The discharge fixing part 40 is attached to the introduction pipe 32 at a predetermined position in the height direction of the introduction pipe 32. The position in the height direction for attaching the discharge fixing part 40 to the introduction pipe 32 may be arbitrarily adjusted by the user. Further, as shown in FIG. 1, the introduction pipe 32 is provided in the connection body 22 so as to be adjacent to a spring member 44 described later of the discharge portion 33. In addition, the introduction pipe 32 is formed with an opening 41 at a position facing the spring member 44, and the mixed gas is sequentially ejected from the injection hole 41. In the present embodiment, the number of the ejection ports 41 may be arbitrarily set, and the shape and size thereof may be arbitrarily selected.

  The discharge unit 33 is for discharging the mixed gas in which the compressed air and the powder 26 in the powder tank 3 are mixed to the outside of the powder tank 3. The discharge portion 33 has a second inlet 42 and a second outlet 43, and a spring member 44 is provided below the second inlet 42. The second inlet 42 is formed so as to be positioned inside the tank body 21 when the connecting body 22 is attached to the tank body 21. Further, the second outlet 43 is formed at a position communicating with a first inlet 67 described later of the injection nozzle 5 when the injection nozzle 5 is attached to the connection body 22.

  The spring member 44 is attached to one end of the discharge portion 33 on the side close to the second introduction port 42. That is, the spring member 44 is attached so as to be positioned in the tank body 21 when the connecting body 22 is attached and fixed to the tank body 21. One end of the spring member 44 is fixed at a position close to the second introduction port 42 of the discharge portion 33, and the other end opposite to the one end is fixed to the discharge fixing portion 40 of the introduction tube 32. As described above, since the discharge fixing portion 40 can arbitrarily adjust the position in the height direction, the spring member 44 also expands and contracts with this adjustment.

[Configuration of liquid tank 4]
As shown in FIG. 1, the liquid tank 4 is attached and fixed to a location where a later-described base member 66 of the spray nozzle 5 is provided. The liquid tank 4 includes a liquid tank main body 45 and a cap 46. The liquid tank main body 45 is a container-like member formed so that liquid such as water can be stored therein, and a second connection portion 10 for connecting to the second connection body 22 is formed in the upper portion. Has been.

  The cap 46 is configured to be detachable from a base member 66 (described later) of the injection nozzle 5. The cap 46 has a second conduit 47, and a hole 48 formed at the end of the second conduit 47 near the second cylinder 62 is formed so as to communicate with the second inlet 70. ing. Therefore, when the liquid tank 4 is attached to the base member 66 at the second connection portion 10, the hole portion 48 that opens at the end portion of the second conduit 47 is connected to the second inlet 70.

[Configuration of Bypass Pipeline 51]
The bypass pipe 51 includes a bypass inlet 52 through which compressed air flows in, a bypass transfer path 54 having a bypass outlet 53 through which compressed air flowing in from the bypass inlet 52 flows out, and the bypass inlet 52 as a second outlet. The bypass pipe 51 is connected to the third connecting portion 11 of the operating portion 2 so as to communicate with the outlet 14, and the bypass outlet 53 is connected to the third inlet 73. And a fourth connected portion 56 connected to the spray nozzle 5 through the passage 51. Accordingly, a part of the compressed air supplied from the external compressed air source via the operation unit 2 can be transferred toward the third inflow port 73 without passing through the powder tank 3. ing.

[Configuration of the injection nozzle 5]
As shown in FIGS. 1, 4 to 6, the injection nozzle 5 includes a first cylinder 61, a second cylinder 62, a third cylinder 63, a first spacer member 64, a second spacer member 65, and a base member. 66. The injection nozzle 5 is configured such that the first cylinder 61 is disposed in the second cylinder 62, the second cylinder 62 is disposed in the third cylinder 63, and the first cylinder 61 is further configured. A first spacer member 64 is arranged between the second cylinder 62 and the second cylinder 62, and a second spacer member 65 is arranged between the second cylinder 62 and the third cylinder 63. Further, the rear end portions of the first cylinder body 61, the second cylinder body 62, and the third cylinder body 63 are fixed by a base member 66.

  The first cylinder 61 is for injecting a mixed gas derived from the powder tank 3. The first cylindrical body 61 is formed so as to have a predetermined diameter in which an inner diameter and an outer diameter are arbitrarily set, and includes a first inlet 67, a first outlet 68, and a first transfer path 69. It is a cylindrical member. The first inlet 67 is formed so as to communicate with the second outlet 43 of the powder tank 3 when the injection nozzle 5 is attached and fixed to the connection body 22 of the powder tank 3. The first outlet 68 is formed at the tip of the injection nozzle 5 so that the mixed gas flowing in from the first inlet 67 is jetted from the first outlet 68 after being transferred through the first transfer path 69. It is configured. In addition, the hole diameter of these 1st inflow ports 67, the hole diameter of the 1st outflow port 68, and the hole diameter of the 1st transfer path 69 may be the same, and may differ. Also, the material of the first cylinder 61 may be arbitrarily selected from conventionally known materials.

  The second cylinder 62 is for ejecting the liquid guided from the liquid tank 4 after being transferred. The second cylinder 62 is formed so that the inner diameter is larger than the outer diameter of the first cylinder 61, and includes a second inlet 70, a second outlet 71, and a second transfer path 72. It is a cylindrical member. The second inflow port 70 is an opening formed so that the liquid stored in the liquid tank 4 flows in, and is formed so as to communicate with the hole 48 of the liquid tank 4. The second outlet 71 is formed at the tip of the injection nozzle 5, and is an opening formed so that the liquid flowing in from the second inlet 70 is jetted after being transferred through the second transfer path 72. is there. The second transfer path 72 is a space formed between the inner peripheral surface of the second cylindrical body 62 and the outer peripheral surface of the first cylindrical body 61 inside the second cylindrical body 62. The liquid such as water flowing in from the second inflow port 70 is jetted from the second outflow port 71 after being transferred through the second transfer unit 8. As shown in FIG. 1, the second cylinder 62 is formed shorter than the first cylinder 61, and the position of the second inlet 70 is located closer to the tip than the first inlet 67. Are arranged as follows. The position of the second outlet 71 is arranged so as to be flush with the first outlet 68.

  The 3rd cylinder 63 is for injecting after conveying the compressed air guided from the bypass pipeline 51 mentioned later. The third cylinder 63 is formed so that the inner diameter is larger than the outer diameter of the second cylinder 62, and includes a third inlet 73, a third outlet 74, and a third transfer path 75. It is a cylindrical member. The third inflow port 73 is a port formed so that compressed air supplied from the bypass line 51 flows in, and is formed so as to communicate with the bypass outflow port 53 of the bypass line 51. The third outlet 74 is formed at the tip of the injection nozzle 5, and is an outlet formed so that the compressed air flowing from the third inlet 73 is injected after being transferred through the third transfer path 75. It is. The third transfer path 75 is a space formed between the inner peripheral surface of the third cylindrical body 63 and the outer peripheral surface of the second cylindrical body 62 inside the third cylindrical body 63. The compressed air flowing in from the third inflow port 73 is jetted from the third outflow port 74 after being transferred through the third transfer path 75. As shown in FIG. 1, the third cylinder 63 is formed shorter than the first cylinder 61 and the second cylinder 62, and the position of the third inlet 73 is the first inlet 67 and the second cylinder 63. It arrange | positions so that it may be located from the front-end | tip rather than the two inflow ports 70. FIG. In addition, the position of the third outlet 74 is arranged at a position closer to the tip than the first outlet 68 and the second outlet 71. That is, the first outlet 68 of the first cylinder 61 and the second outlet 71 of the second cylinder 62 are both located inside the third cylinder 63, and the second outlet 71 is the second outlet 71. It arrange | positions so that it may be located near a rear end rather than one outflow port. Note that the third cylindrical body may be formed with a tapered end from the tip. By forming the taper in this manner, it becomes easier to effectively generate a Venturi effect described later in the vicinity of the second outlet 71 described later, and the suction force of the liquid in the liquid tank 4 can be improved. .

  As shown in FIG. 3A, the first spacer member 64 is formed with a first insertion hole 81 through which the first cylindrical body 61 is inserted. The first insertion hole 81 is formed so as to have a hole diameter substantially the same as the outer diameter of the first cylinder 61, and is formed so as not to rattle with the inserted first cylinder 61. Yes. The first spacer member 64 has alternately formed first arcuate portions 82 whose outer peripheral surfaces are formed on arcs and first notches 83 formed in a straight line. In the present embodiment, four each of the first arcuate portions 82 and the first notch portions 83 are formed, but the number of the first arcuate portions 82 and the first notch portions 83 is as follows. It is not limited to this. Moreover, the number of the 1st circular arc-shaped parts 82 and the number of the 1st notch parts 83 may be the same, and may differ. The first arc-shaped portion 82 is formed to have substantially the same curvature as the curvature of the inner peripheral surface of the second cylindrical body 62, and when arranged in the second cylindrical body 62, the first arc-shaped portion 82 82 and the inner peripheral surface of the second cylindrical body 62 are formed in contact with each other. The first notch portion 83 is configured to have a predetermined interval with the inner peripheral surface of the second cylindrical body 62 by forming a notch in a straight line, thereby forming a gap. Note that the gap between the outer surface of the first notch 83 and the inner peripheral surface of the second cylindrical body 62 formed by the first notch 83 can be arbitrarily set. The distance between the outer surface of the first cutout 83 formed and the inner peripheral surface of the second cylindrical body 62 is formed between the outer peripheral surface of the first cylindrical body 61 and the inner peripheral surface of the second cylindrical body 62. It is formed so as to be narrower than the gap interval. Moreover, in this Embodiment, although the 1st spacer member 64 is arrange | positioned near the front-end | tip of the injection nozzle 5, the place which arrange | positions this 1st spacer member 64 is not limited to this. Further, the number of the first spacer members 64 disposed is not limited to one, and a plurality of first spacer members 64 may be disposed.

  As shown in FIG. 3B, the second spacer member 65 has a second insertion hole 84 through which the second cylindrical body 62 is inserted. In addition, the second spacer member 65 has alternately formed second arc-shaped portions 85 whose outer peripheral surfaces are formed in an arc shape and second notches 86 formed in a linear shape. In the present embodiment, four each of the second arcuate portions 85 and the second notch portions 86 are formed, but the number of the second arcuate portions 85 and the second notch portions 86 is as follows. May be the same or different. The second arc-shaped portion 85 is formed so as to have substantially the same curvature as the curvature of the inner peripheral surface of the third cylindrical body 63, and when arranged in the third cylindrical body 63, the second arc-shaped portion 85 85 and the inner peripheral surface of the first cylindrical body 61 are formed so as to contact each other. The second cutout portion 86 is formed to form a gap with a predetermined interval between the second cutout portion 86 and the inner peripheral surface of the third cylinder 63 by cutting out in a straight line. In addition, although the space | interval of the clearance gap formed between this 2nd notch part 86 and the internal peripheral surface of the 3rd cylinder 63 can be set arbitrarily, the 2nd notch part formed in this way The distance between the outer surface of 86 and the inner peripheral surface of the third cylinder 63 is narrower than the gap formed between the outer peripheral surface of the second cylinder 62 and the inner peripheral surface of the third cylinder 63. Formed as follows. Moreover, in this Embodiment, although the 2nd spacer member 65 is formed from the front-end | tip of the injection nozzle 5, the place which arrange | positions this 2nd spacer member 65 is not limited to this. Further, the number of the second spacer members 65 arranged is not limited to one, and a plurality of second spacer members 65 may be arranged.

  The base member 66 is formed at an end near the rear end of the injection nozzle 5 and is configured such that the first cylinder 61, the second cylinder 62, and the third cylinder 63 are disposed therein. . Further, a third connection portion 11 formed so as to be connectable to the second connected portion 31 of the connection body 22 is formed on the rear end side of the base member 66. The base member 66 is formed with a fourth connection portion 87 for mounting and fixing the liquid tank 4. The fourth connecting portion 87 is configured to be able to be connected to the second connecting body 22 constituting the liquid tank 4, and when the liquid tank 4 is connected, the fourth connecting portion 87 is connected to the hole portion 48 of the liquid tank 4. The two inlets 70 are configured to communicate with each other.

  As shown in FIG. 4, when viewed from the tip, the injection nozzle 5 has a first cylinder 61, a first spacer member 64, a second cylinder 62, a second spacer member 65, from the radially inner side to the outer side. The 3rd cylinder 63 is arrange | positioned in order. The outer peripheral surface of the first cylinder 61 and the inner peripheral surface of the first insertion hole 81 in the first spacer member 64 are in contact with each other, and rattling occurs between the first cylinder 61 and the first spacer member 64. Arranged not to. The first spacer member 64 and the second cylindrical body 62 are configured such that the outer peripheral surface of the first arc-shaped portion 82 of the first spacer member 64 and the inner peripheral surface of the second cylindrical body 62 are in contact with each other. The spacer member 64 and the second cylinder 62 are disposed so as not to rattle. Further, the first spacer member 64 is disposed between the first cylinder body 61 and the second cylinder body 62, so that the space between the first cylinder body 61 and the second cylinder body 62 and the first spacer member 64 are A gap having a predetermined interval is stably formed between the first notch 83 and the second cylinder 62.

  Further, the outer peripheral surface of the second cylindrical body 62 and the inner peripheral surface of the second insertion hole 84 in the second spacer member 65 are in contact with each other and are arranged so as not to cause backlash. The second spacer member 65 and the third cylindrical body 63 are configured such that the outer peripheral surface of the second arcuate portion 85 of the second spacer member 65 and the inner peripheral surface of the third cylindrical member 63 are in contact with each other. The spacer member 65 and the third cylinder 63 are arranged so as not to rattle. In addition, the second spacer member 65 is disposed between the second cylinder body 62 and the third cylinder body 63, so that the space between the second cylinder body 62 and the third cylinder body 63 and the second spacer member 65 can be reduced. A gap having a predetermined interval is stably formed between the second notch 86 and the third cylinder 63.

  Next, the effect of the blasting apparatus 1 according to the present invention will be described. First, the mechanism sprayed from the spray nozzle 5 of the blasting apparatus 1 according to the present invention will be described.

  As shown in FIGS. 1 and 5, the injection nozzle 5 of the blast device 1 includes a first cylinder 61, a second cylinder 62, and a third cylinder 63, and the inner peripheral surface of these first cylinders 61. A region surrounded by the first transfer path 69 is a region surrounded by the outer peripheral surface of the first cylinder 61 and the inner peripheral surface of the second cylinder 62 is a second transfer path 72, and further the second cylinder. A region surrounded by the outer peripheral surface of the body 62 and the inner peripheral surface of the third cylinder 63 is a third transfer path 75. A first outlet 68 opens at the tip of the first transfer path 69, a second outlet 71 opens at the tip of the second transfer path 72, and a tip of the third transfer path 75. The third outlet 74 is open.

  As described above, since the mixed gas in which the compressed air and the granular material 26 are mixed flows into the first inlet 67 located on the innermost diameter side in each transfer path, the mixed gas is supplied from the first outlet 68. Is injected. Since this mixed gas uses compressed air supplied from a compressed air source outside the blasting apparatus 1, it is injected at a predetermined injection pressure. Therefore, at the tip of the injection nozzle 5, a phenomenon occurs in which the pressure in the region near the first outlet 68 is lower than the external pressure due to the venturi effect. As a result, the pressure in the second transfer path 72 is also reduced, and the liquid in the liquid tank 4 arranged to communicate with the second inlet 70 is sucked. Then, the sucked liquid flows in from the second inlet 70 of the injection nozzle 5, is transferred through the second transfer path 72, and is then jetted outward from the second outlet 71.

  At this time, in the blasting apparatus 1 according to the present embodiment, a part of the compressed air supplied from the compressed air source flows in from the third inflow port 73 via the bypass pipe 51 and passes through the third transfer path 75. It is transferred and flows out from the third outlet 74. Thereby, in the vicinity of the second outlet 71, the Venturi effect due to the gas mixture injected from the first outlet 68 and the Venturi effect due to the compressed air injected from the third outlet 74 are combined. Can do. Therefore, according to the blasting apparatus 1 according to the present embodiment, the state where the pressure in the vicinity of the second outlet 71 is lowered can be made more effective, and the liquid in the liquid tank 4 can be sucked even more efficiently. Then, it is possible to eject from the second outlet 71.

  In particular, by jetting compressed air from the third outlet 74, the direction in which the liquid jetted from the second outlet 71 is scattered can be made more uniform. Therefore, the granular material 26 can be ejected more efficiently toward the surface to be processed, and the surface to be processed can be cleaned more efficiently.

  Further, in the blasting apparatus 1 according to the present embodiment, the first spacer member 64 is disposed in the second transfer path 72 of the injection nozzle 5, and the second spacer member 64 is provided with a notch, thereby providing the second spacer. The area through which the liquid passes in the transfer path 72 is reduced. Therefore, the liquid passing through the second transfer path 72 passes through the area reduced by the first spacer member 64 while increasing its flow rate, and thereafter, while maintaining the flow rate, the second liquid is passed. It can be ejected from the outlet 71. Therefore, according to the blasting apparatus 1 according to the present embodiment, the first spacer member 64 is arranged in the second transfer path 72 so that the rattling between the first cylinder 61 and the second cylinder 62 during use is eliminated. Not only can be prevented, but the flow rate of the liquid ejected from the second outlet 71 is increased, and the liquid in the liquid tank 4 is sucked more efficiently and ejected from the second outlet 71 to be processed. It becomes possible to make it easier to remove dirt on the surface.

  Further, in the blasting apparatus 1 according to the present embodiment, the second spacer member 65 is disposed in the third transfer path 75 of the injection nozzle 5, and the second notch 86 is provided in the second spacer member 65. The area through which the compressed air passes through the third transfer path 75 is reduced. Therefore, the compressed air passing through the third transfer path 75 passes through the area reduced by the second spacer member 65 while increasing its flow velocity, and thereafter compresses while maintaining the increased flow velocity. Air can be ejected from the third outlet 74. Therefore, according to the blasting apparatus 1 according to the present embodiment, the second spacer member 65 is arranged in the third transfer path 75, so that the backlash between the second cylinder 62 and the third cylinder 63 during use is reduced. In addition, it is possible to increase the flow velocity of the compressed air ejected from the third outlet 74 and to easily generate a negative pressure in the vicinity of the second outlet 71. Therefore, in the blasting apparatus 1 according to the present embodiment, the liquid in the liquid tank 4 can be more easily sucked, and further, the amount of liquid ejected from the second outlet 71 and ejected from the first outlet 68. It becomes possible to greatly increase the amount of the mixed gas.

  Next, the function and effect of the powder tank 3 will be described. In the blasting apparatus 1 according to the present embodiment, when the connecting body 22 is attached to the tank main body 21, the introduction pipe 32, the discharge portion 33, and the spring member 44 are disposed in the tank main body 21. When the user operates the adjustment lever 15 of the operation unit 2, the compressed air supplied from the compressed air source is introduced into the tank body 21 through the inflow path 27 and the introduction pipe 32. The introduced compressed air makes the granular material 26 stored in the tank main body 21 scatter in the tank main body 21 and becomes dusty. And it becomes mixed gas which dust-like granular material 26 and compressed air mix, and is discharged from discharge part 33.

  At this time, according to the blasting apparatus 1 according to the present embodiment, since the spring member 44 is attached and fixed to the discharge part 33, the mixed gas is always discharged when it is discharged toward the discharge part 33. After passing through the spring member 44, it flows toward the discharge portion 33 so as to pass from the outside toward the inside. Therefore, when the mixed gas in the form of dust is transferred toward the discharge unit 33, the possibility of clogging in the discharge unit 33 can be reliably prevented, and a predetermined amount of the mixed gas can always be supplied.

  This is because the mixed gas flows toward the discharge portion 33 after passing through the spring member 44. That is, since the mixed gas includes the dusty granular material 26, the gas mixture is likely to be clogged, but the blast device 1 according to the present embodiment has the spring member 44 attached to the discharge portion 33. The place where clogging is most likely to occur is the spring member 44, which can prevent clogging in the discharge portion 33. In addition, since the blast device 1 is used by a user in his / her hand, the blast device 1 often swings in the front / rear, up / down, left / right directions. For this reason, even if the spring member 44 is clogged with the mixed gas, the spring member 44 is also shaken by the shaking of the blasting device 1, so that the spring member 44 is removed from the granular material 26 and the spring member 44 that cause clogging. can do. Therefore, in the blasting apparatus 1 according to the present embodiment, clogging due to the mixed gas in the powder tank 3 can be reliably prevented, and the mixed gas is reliably ejected from the first outlet 68. In addition, it is possible to remove dirt and the like on the surface to be processed.

  Further, in the blasting apparatus 1 according to the present embodiment, an outlet 41 is formed in the side wall of the introduction pipe 32. Therefore, when compressed air is supplied, the compressed air is ejected from the ejection port 41 in conjunction with the transfer of the compressed air toward the stored granular material 26. Since the ejection port 41 is formed at a position facing the spring member 44, the compressed air ejected from the ejection port 41 is ejected toward the spring member 44. Therefore, when clogging occurs in the spring member 44, the clogging can be removed also by the jetted compressed air. Further, when compressed air is supplied, it is also ejected from the ejection port 41, so that the occurrence of clogging in the spring member 44 can be prevented in advance.

  As described above, the blasting apparatus 1 according to the present embodiment ejects the mixed gas containing the granular material 26 using only the compressed air supplied from the compressed air source, and surrounds the ejected mixed gas. In addition, since the liquid is ejected by the venturi effect and the compressed air is ejected so as to surround the liquid, the blast device 1 can be connected only to the compressed air source with an external supply source. It is not necessary to connect other supply sources of the granular material 26 and the like. Therefore, according to this invention, when using the blasting apparatus 1, piping etc. do not get entangled and it becomes possible to manage the blasting apparatus 1 easily. In addition, this makes it possible to easily perform work at a fine location and the like, so that work efficiency can be greatly increased.

  The configuration of the blasting apparatus according to the present invention has been described above, but this is only an example of the blasting apparatus according to the present invention, and the present invention is not limited to this. Further, the blasting apparatus of the present invention may be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Blasting device 2 Operation part 3 Powder body tank 4 Liquid tank 5 Injection nozzle 26 Powder body 61 1st cylinder 62 2nd cylinder 63 3rd cylinder 64 1st spacer member 65 2nd spacer member 67 1st flow Inlet 68 First outlet 69 First transfer path 70 Second inlet 71 Second outlet 72 Second transfer path 73 Third inlet 74 Third transfer path

Claims (7)

A blasting apparatus for processing a surface to be processed by injecting a gas mixture and a liquid containing an injection medium from a tip of an injection nozzle,
An intake port for taking in compressed gas supplied from an external compressed gas source;
An inlet for introducing the compressed gas into the storage space; and an outlet for introducing the mixed gas containing the injection medium in the storage space. An injection medium tank having
A liquid tank for storing the liquid,
The spray nozzle is
A first cylinder having a first inlet into which the mixed gas flows, a first outlet from which the mixed gas is ejected, and a first transfer path formed between the first inlet and the first outlet; ,
The first cylinder is formed larger than the first cylinder, and the first cylinder is disposed therein. The second inlet through which the liquid flows in, the second outlet through which the liquid ejects, the second inlet, and the second A second cylinder having a second transfer path formed between the two outlets and radially outside the outer peripheral surface of the first cylinder;
When the mixed gas is ejected from the first outlet, the liquid in the liquid tank is sucked by generating a negative pressure at the second outlet, the second transfer path, and the second inlet due to the venturi effect. The blasting apparatus is configured to eject the sucked liquid from the second outflow port.   A third inflow port into which the compressed gas supplied from a compressed gas source flows, and the compressed gas is ejected, is formed larger than the second cylindrical body, and the first cylindrical body and the second cylindrical body are disposed therein. A third cylinder having a third transfer path formed between the third outlet and the third outlet and the third outlet and formed radially outside the outer peripheral surface of the second cylinder. The blasting device according to claim 1 provided.   The blasting device according to claim 2, wherein the first cylinder is disposed inside the third cylinder so that the first outlet is located inside the third cylinder.   The 1st spacer member for maintaining the space | interval of the outer peripheral surface of a 1st cylinder and the internal peripheral surface of a 2nd cylinder to a predetermined dimension is arrange | positioned at the 2nd transfer path. The blasting device according to any one of the above.   The blasting device according to claim 4, wherein the first spacer member is formed with a first notch for allowing the mixed gas to pass through the first transfer path.   The second spacer member for maintaining a distance between the outer peripheral surface of the second cylinder and the inner peripheral surface of the third cylinder at a predetermined dimension is disposed in the third transfer path. The blasting device according to any one of the above.   The blast device according to claim 6, wherein the second spacer member is formed with a second notch for allowing passage of the compressed gas passing through the second transfer path.

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