JP2006218559A - Granular material injection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a granular material injection device capable of injecting a granular material around an injection port for injecting fluid. <P>SOLUTION: In a nozzle part 12 of a blasting device 10, gas passes through an injection passage 18 inside an inner pipe 14 to be injected from an injection port 22 and collides with a collision plate 30, thereby radially being injected to the periphery of the injection port 22. A solid-gas two-phase flow including solid particles is supplied from a supply port 24 to the gas to be radially injected via a supply passage 20 between the inner pipe 14 and an outer pipe 16. By this, the solid particles in the solid-gas two-phase flow can be radially injected around the nozzle part 12 together with the gas to be radially injected. Consequently, the inner face of a pipe, into which the nozzle part 12 is inserted, can be ground. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a granular material injection device for injecting granular material.

  Due to the modernization of the industry, the fluid flowing through the pipes that make up the piping system is diverse. For this reason, pipes are used after being coated with various substances on the inner surface or subjected to high-precision processing.

  Moreover, as an air-type blasting device, there is one in which an inner tube nozzle is disposed in an outer tube nozzle (see, for example, Patent Document 1).

  This air-type blasting apparatus performs blasting with an abrasive material by ejecting compressed air from an inner tube nozzle and ejecting an abrasive material conveyed by compressed air from an outer tube nozzle.

  Here, in this air-type blasting apparatus, the abrasive is ejected in a direction opposite to the tips of the inner tube nozzle and the outer tube nozzle.

However, in order to insert the inner tube nozzle and the outer tube nozzle into the pipe and to blast the inner surface of the pipe, the polishing material is jetted around the tips of the inner tube nozzle and the outer tube nozzle. It is desirable.
JP-A-5-69327

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a granule ejecting apparatus that can eject a granule around an ejection port that ejects a fluid.

  The granular material injection device according to claim 1, an injection pipe that injects fluid from an injection port, a collision body in which fluid injected from the injection port collides and is injected around the injection port, and the collision A supply pipe for supplying particles from a supply port to a fluid jetted around the jet port by the body.

  In the granular material injection device according to claim 1, the injection pipe injects fluid from the injection port. Further, the fluid ejected from the ejection port collides with the collision body and is ejected around the ejection port. Further, the supply pipe supplies particles from the supply port to the fluid that is jetted around the jet port by the collision body. For this reason, a granule can be injected with a fluid to the circumference | surroundings of an injection port.

  The granular material injection device according to claim 2 is the granular material injection device according to claim 1, wherein the collision body is disposed outside a range facing the supply port in a granular material supply direction from the supply port. It is characterized by that.

  In the granular material injection apparatus according to the second aspect, the collision body is disposed outside the range facing the supply port in the granular material supply direction from the supply port. For this reason, it can suppress that a granule collides with a colliding body.

  The granular material injection device according to claim 3 is the granular material injection device according to claim 1 or 2, wherein the collision body uniformly injects the fluid injected from the injection port to the periphery of the injection port. It is characterized by that.

  In the granular material injection device according to the third aspect, the collision body causes the fluid injected from the injection port to be uniformly injected around the injection port. For this reason, it is possible to easily inject the particles uniformly around the injection port.

  The granular material injection device according to claim 4 is the granular material injection device according to any one of claims 1 to 3, wherein the supply pipe moves particles from the supply port to the periphery of the injection port. It is characterized by supplying evenly.

  In the granular material injection apparatus according to the fourth aspect, the supply pipe supplies the granular material from the supply port evenly around the injection port. For this reason, it is possible to easily inject the particles uniformly around the injection port.

  The granular material injection device according to claim 5 is the granular material injection device according to any one of claims 1 to 4, wherein the supply pipe removes particles from the supply port around the entire injection port. It is characterized by supplying while turning.

  In the granular material injection apparatus according to the fifth aspect, the supply pipe supplies the granular material from the supply port while swirling the entire periphery of the injection port. For this reason, a granule can be uniformly supplied to the circumference | surroundings of a jet nozzle.

  A granular material injection device according to a sixth aspect is the granular material injection device according to any one of the first to fifth aspects, wherein the granular material injection device is fixed in the injection pipe and allows passage of fluid and the collision. It is characterized by comprising a support member for supporting the body.

  In the granular material injection device according to the sixth aspect, the support member fixed in the injection pipe permits the passage of the fluid and supports the collision body. For this reason, a support member can support a collision object, without preventing passage of fluid in a jet pipe.

  A granular material injection device according to a seventh aspect is the granular material injection device according to any one of the first to sixth aspects, wherein the granular material injection device is connected to the injection pipe and the supply pipe and has flexibility. It is characterized by having a tube.

  In the granular material injection apparatus according to the seventh aspect, the flexible pipe connected to the injection pipe and the supply pipe has flexibility. For this reason, even if the insertion path into which the injection pipe and the supply pipe are inserted is bent, the injection pipe and the supply pipe can be easily inserted into the insertion path.

  As described above, according to the granular material ejecting apparatus of the present invention, it is possible to obtain the effect that the granular material can be ejected around the fluid ejection port.

[First Embodiment]
FIG. 1 is a cross-sectional view showing a main part of a blasting apparatus 10 according to a first embodiment configured by applying the granular material injection apparatus of the present invention.

  The blasting apparatus 10 according to the present embodiment includes a nozzle portion 12, and the nozzle portion 12 includes a circular inner tube 14 serving as an injection tube and a circular outer tube 16 serving as a supply tube. Is provided. The inner tube 14 and the outer tube 16 are arranged on the same axis with their tips aligned on the same plane. The inner tube 14 has a circular cross-sectional injection path 18 and is connected to the inner tube 14. A space between the outer tube 16 and the outer pipe 16 is an annular supply path 20. Further, the tip of the inner tube 14 (tip of the injection path 18) is a circular injection port 22, and the space between the ends of the inner tube 14 and the outer tube 16 (tip of the supply path 20) is an annular supply port. 24.

  A circular flat plate-like porous plate 26 constituting a support member is fixed in the vicinity of the distal end of the inner tube 14, and the porous plate 26 has many through holes formed as fluid in the inner tube 14. Allow the passage of gas (especially air). A base end of a columnar support column 28 constituting a support member is fixed to the perforated plate 26, and the support column 28 protrudes from the distal end of the inner tube 14.

  A circular flat collision plate 30 as a collision body is fixed to the tip of the support column 28, and the collision plate 30 is supported by the inner tube 14 by the perforated plate 26 and the support column 28, The central axes are arranged in a matched state. The diameter of the collision plate 30 is smaller than the outer diameter of the inner tube 14, and the collision plate 30 faces the injection port 22 of the inner tube 14 and is a supply port between the distal ends of the inner tube 14 and the outer tube 16. 24 is not disposed at all. Further, the gap in the axial direction of the inner tube 14 between the collision plate 30 and the injection port 22 is set to be not more than four times the diameter of the injection port 22.

  A supply portion 32 (see FIGS. 2 and 3) is connected to the proximal end side of the nozzle portion 12 (the inner tube 14 and the outer tube 16), and the supply portion 32 has a substantially cylindrical shape as a swirl flow generating portion. A vessel-shaped production vessel 34 is provided.

  A cylindrical outer tube 36 is fixed to the front end side wall of the generation container 34, and the outer tube 36 is in communication with the generation container 34 with the center axis coincided with the generation container 34. The outer tube 36 is connected to the proximal end side of the outer tube 16 via an outer tube 38 as a flexible tube, and the outer tube 38 has flexibility.

  A cylindrical inner tube 40 is provided in the generation container 34, and the inner tube 40 penetrates through the generation container 34 in a state where the central axis coincides with the generation container 34 and the outer tube 36. It protrudes from the distal end side surface and the proximal end side surface, and protrudes from the distal end of the outer tube 36 while being disposed inside the outer tube 36. The inside of the inner tube 40 is a jet introduction passage 42 having a circular cross section, and the supply introduction passage 44 having a circular cross section is formed between the inner tube 40 and the outer tube 36. The inner tube 40 is connected to the proximal end side of the inner tube 14 via an inner tube 46 as a flexible tube. The inner tube 46 has flexibility and is disposed inside the outer tube 38. ing.

  A predetermined number (preferably about 1 to 10) of cylindrical supply cylinders 48 is provided on the peripheral wall of the generation container 34. The predetermined number of supply tubes 48 are preferably arranged at the same interval along the circumferential direction of the generation container 34 and on the same meridian of the generation container 34. The predetermined number of supply cylinders 48 are preferably such that the generatrix at one end in the circumferential direction of the production vessel 34 is at a constant angle of 0 ° or more and 90 ° or less with respect to the tangent to the production vessel 34 meridian passing through the generatrix (the angle in FIG. 2). 3) and the central axis is inclined at a constant angle of 0 ° or more and 180 ° or less with respect to the generatrix of the generation vessel 34 passing through the central axis (angle β in FIG. 3). ) To the same side (tip side or base side).

  The proximal end side of the inner tube 40 is connected to a gas source (not shown) as a fluid source, and the gas source supplies a high-pressure jet of gas. Each supply cylinder 48 is connected to a header (not shown) as a granule source, and the header is a granule in which solid particles as a granule and gas (particularly air) as a fluid are mixed. A solid-gas two-phase flow is supplied as a mixed flow.

  Next, the operation of the present embodiment will be described.

  In the blast device 10 having the above configuration, a gas jet is supplied from the gas source to the inner tube 40, so that the gas is injected into the injection introduction path 42, the inner tube 46, and the inner tube 14 in the inner tube 40. It is injected from the injection port 22 of the inner pipe 14 via the path 18. Further, the collision plate 30 faces the injection port 22 in the axial direction of the inner tube 14 (the direction of gas injection from the injection port 22), and the gap in the axial direction of the inner tube 14 between the injection port 22 and the collision plate 30 is the injection port. The diameter is 22 times or less of the diameter of 22. Thereby, the gas injected from the injection port 22 collides with the collision plate 30 and is injected radially around the injection port 22 (hereinafter, this gas injection flow is referred to as “radial gas jet”).

  Further, the solid-gas two-phase flow is supplied from the header to each supply cylinder 48, so that the solid-gas two-phase flow is made into an annular flow in the generation container 34. For this reason, the solid-gas two-phase flow is introduced into the supply introduction path 44 between the inner tube 40 and the outer tube 36 in a swirl flow, between the inner tube 46 and the outer tube 38 and between the inner tube 14 and the outer tube 38. The gas is supplied to the radial gas jet from a supply port 24 between the distal ends of the inner tube 14 and the outer tube 16 via a supply path 20 between the tube 16 and the tube 16. As a result, a solid-gas two-phase flow is ejected radially around the nozzle portion 12 together with the radial gas jet (hereinafter, this radial gas-jet and solid-gas two-phase jet is referred to as a “solid-gas two-phase jet”). The solid particles in the solid-gas two-phase jet are ejected radially around the nozzle portion 12.

  For this reason, as shown in FIG. 4, by inserting the nozzle portion 12 into a circular pipe 50 as a processing target, solid particles in a solid-gas two-phase jet that is ejected radially around the nozzle portion 12 are generated. The inner surface of the pipe 50 can be ground.

  Further, since the central axis of the inner tube 14 and the collision plate 30 coincide with each other, the gas injected from the injection port 22 of the inner tube 14 is uniformly and radially injected by the collision plate 30 around the injection port 22. . In addition, since the supply port 24 between the tips of the inner tube 14 and the outer tube 16 is disposed on the entire outer periphery of the injection port 22, a solid-gas two-phase flow is uniformly supplied from the supply port 24 to the periphery of the injection port 22. Is done. For this reason, the solid particles in the solid-gas two-phase jet can be uniformly ejected radially around the nozzle portion 12.

  In addition, since the injection pressure of the solid-gas two-phase jet injected radially around the nozzle portion 12 is uniform around the nozzle portion 12, the nozzle portion 12 is automatically centered on the pipe 50 in the pipe 50. Retained. Thereby, the inner surface of the pipe 50 can be uniformly ground in the circumferential direction of the pipe 50.

  Furthermore, since the solid-gas two-phase flow swirled as described above is supplied to the supply path 20, the density of solid particles in the solid-gas two-phase flow supplied from the supply port 24 is around the supply port 24. It becomes uniform. For this reason, the solid particles in the solid-gas two-phase jet can be injected more uniformly radially around the nozzle portion 12.

  Further, the collision plate 30 has a supply port 24 between the distal ends of the inner tube 14 and the outer tube 16, and an axial direction of the inner tube 14 and the outer tube 16 (solid gas two-phase flow supply direction from the supply port 24). It is arranged so as not to face at all. For this reason, it can suppress that the solid particle in a solid-gas two-phase flow collides with the collision board 30, and can suppress that the collision board 30 is worn out.

  Further, the perforated plate 26 fixed in the inner tube 14 allows the passage of gas and supports the collision plate 30 via the support column 28. For this reason, the perforated plate 26 can support the collision plate 30 without preventing the passage of gas in the inner tube 14.

  Further, the axial length of the nozzle portion 12 (the inner tube 14 and the outer tube 16) can be shortened, and the nozzle portion 12 is connected to the supply portion 32 via the outer tube 38 and the inner tube 46. For this reason, even when the pipe 50 (insertion path of the nozzle part 12) is curved, the nozzle part 12 can be inserted into the pipe 50 by bending the outer tube 38 and the inner tube 46. The inner surface can be easily ground.

[Second Embodiment]
FIG. 5 is a cross-sectional view showing a main part of a blasting device 60 according to a second embodiment configured by applying the granular material injection device of the present invention.

  The blast device 60 according to the present embodiment is different from the blast device 10 according to the first embodiment in the following points.

  In the nozzle portion 12 of the blast device 60, the injection path 18 in the inner tube 14 is formed into a diameter-expanded portion 62 that gradually increases in diameter toward the distal end side at the distal end portion of the inner tube 14. The base end is used as the injection port 22, and the tip of the enlarged diameter portion 62 is used as the injection port 64. Further, an annular flat plate-like flange portion 66 is integrally formed on the entire outer periphery of the distal end of the outer tube 16.

  The collision plate 30 has a circular flat plate-shaped central portion 30A, and the central portion 30A is supported by the inner tube 14 by the perforated plate 26 and the support pillar 28, and is aligned with the inner tube 14 at the central axis. Is arranged. The diameter of the central portion 30 </ b> A is smaller than the outer diameter of the inner tube 14, and the central portion 30 </ b> A is disposed so as not to face the supply port 24 between the distal ends of the inner tube 14 and the outer tube 16. Further, the gap between the central portion 30 </ b> A and the injection port 22 in the axial direction of the inner pipe 14 is set to be not more than four times the diameter of the injection port 22.

  The collision plate 30 has an annular plate-shaped inclined portion 30B on the outer periphery of the central portion 30A. The inclined portion 30B is integrated with the central portion 30A, and gradually moves toward the outer side in the radial direction. It is inclined in a direction toward the 14th side (base end side). The inclined portion 30B faces the portion of the jet port 64 excluding the jet port 22.

  The collision plate 30 has an annular flat plate-like outer peripheral portion 30C on the outer periphery of the inclined portion 30B, and the outer peripheral portion 30C is integrated with the inclined portion 30B. The outer diameter of the outer peripheral portion 30C is made larger than the outer diameter of the portion excluding the flange portion 66 of the outer tube 16, and the outer peripheral portion 30C has the supply port 24 and the outer tube 16 between the distal ends of the inner tube 14 and the outer tube 16. It faces the flange portion 66.

  Here, also in the present embodiment, the flow velocity of the radial gas jet ejected from the inclined portion 30B of the collision plate 30 is sufficiently large and has the effect of suppressing the wear of the collision plate 30, and is the same as in the first embodiment. There is an effect.

  Further, the gas jetted from the jet port 22 of the inner tube 14 collides with the central portion 30A of the collision plate 30 and is ejected radially to the periphery of the jet port 22 as a peripheral wall (inclined surface) of the inner tube 14. ) And the inclined portion 30 </ b> B of the collision plate 30, and is injected radially around the injection port 22. In addition, the solid-gas two-phase jet, in which the solid-gas two-phase flow is supplied to the radial gas jet from the supply port 24, is guided between the flange portion 66 of the outer tube 16 and the outer peripheral portion 30 </ b> C of the collision plate 30. It is injected radially around the part 12. Therefore, the solid-gas two-phase jet can be stably ejected radially around the nozzle portion 12, and the solid particles in the solid-gas two-phase jet can be ejected more uniformly radially around the nozzle portion 12. Can do.

  In the first embodiment and the second embodiment described above, a predetermined number of supply cylinders 48 are provided on the peripheral wall of the generation container 34 in the supply unit 32. A configuration in which a predetermined number of supply cylinders 48 are provided on the tip side wall may be employed. In this case, the predetermined number of supply cylinders 48 are preferably arranged at the same interval along the circumferential direction of the generation container 34 and at the same distance from the central axis of the generation container 34. Further, the central axis of the predetermined number of supply cylinders 48 is preferably inclined to the same circumferential direction of the generation container 34 by a certain angle of 0 ° or more and 90 ° or less with respect to the central axis of the generation container 34.

[Third Embodiment]
FIG. 6 is a sectional view showing the main part of a blasting device 70 according to a third embodiment configured by applying the granular material injection device of the present invention.

  The blast device 70 according to the present embodiment is different from the blast device 10 according to the first embodiment in the following points.

  In the blast device 70, the supply unit 32 of the first embodiment is not provided.

  In the nozzle portion 12 of the blast device 70, a gas source is connected to the proximal end side of the inner tube 14 via an inner tube 72 as a flexible tube, and the inner tube 72 has flexibility. ing.

  The base end between the inner tube 14 and the outer tube 16 is closed by an annular flat plate-like closing plate 74. As shown in FIG. 7, the closed plate 74 is provided with a predetermined number of outer tube tubes 76 as flexible tubes at equal intervals (preferably without gaps) in the circumferential direction. It is flexible and connected to the header.

  Here, in the blast device 70 according to the present embodiment, a gas jet is supplied from a gas source to the inner tube so that the inner tube passes through the inner tube 72 and the injection path 18 in the inner tube 14. Gas is injected from the 14 injection ports 22. Thereby, the gas injected from the injection port 22 collides with the collision plate 30, and a radial gas jet is injected radially around the injection port 22.

  Further, the solid-gas two-phase flow is supplied from the header to each outer tube 76, so that the solid-gas two-phase flow is supplied to each outer tube 76 and between the inner tube 14 and the outer tube 16. Then, a radial gas jet is supplied from a supply port 24 between the distal ends of the inner tube 14 and the outer tube 16. Thereby, the solid-gas two-phase jet is ejected radially around the nozzle portion 12, and the solid particles in the solid-gas two-phase jet are ejected radially around the nozzle portion 12.

  For this reason, also in the present embodiment, the same effects as those of the first embodiment can be obtained except for the effect of supplying the solid-gas two-phase flow made into the swirl flow from the supply port 24.

  In the present embodiment, a spiral plate-like turning spiral may be provided on at least one of the outer periphery of the distal end portion of the inner tube 14 and the inner periphery of the distal end portion of the outer tube 16. Thereby, the solid-gas two-phase flow made into the swirl flow by the swirl spiral can be supplied from the supply port 24.

[Fourth Embodiment]
FIG. 8 is a bottom view of a main part of a blasting device 80 according to a fourth embodiment configured by applying the granular material injection device of the present invention as viewed from the front end side.

  The blast device 80 according to the present embodiment is different from the blast device 70 according to the third embodiment in the following points.

  In the nozzle portion 12 of the blast device 80, a predetermined number of circular outer peripheral pipes 82 as supply pipes are provided in place of the outer pipe 16. The predetermined number of outer pipes 82 are arranged in parallel to the inner pipe 14 at equal intervals in the circumferential direction of the inner pipe 14 (preferably without gaps). The outer tube 82 and the inner tube 14 are aligned on the same plane. The inside of each outer peripheral pipe 82 is a supply path 84 having a circular cross section, and the front end of each outer peripheral pipe 82 (the front end of each supply path 84) is a circular supply port 86.

  The supply port 86 of each outer peripheral pipe 82 is arranged so as not to face the collision plate 30 at all. Further, the base end side of each outer peripheral tube 82 is connected to the header via each outer tube 76.

  Here, in the blast device 80 according to the present embodiment, the solid-gas two-phase flow is supplied from the header to each outer tube 76 so that the solid-gas two-phase flow is generated in each outer tube 76 and each outer periphery. The gas is supplied to the radial gas jet from the supply port 86 of each outer peripheral pipe 82 via the supply path 84 in the pipe 82. Thereby, the solid-gas two-phase jet is ejected radially around the nozzle portion 12, and the solid particles in the solid-gas two-phase jet are ejected radially around the nozzle portion 12.

  For this reason, the present embodiment can achieve the same effects as those of the third embodiment.

  In the third embodiment and the fourth embodiment, the configuration on the tip side of the nozzle portion 12 is the same as that in the first embodiment, but the configuration on the tip side of the nozzle portion 12 is the same as that described above. A configuration similar to that of the second embodiment may be employed.

  Further, in the first to fourth embodiments, a hole plate 90 constituting the support member shown in FIG. 9 may be used in place of the porous plate 26. Here, the hole plate 90 is provided with an annular peripheral portion 92, and the peripheral portion 92 is fixed in the vicinity of the distal end of the inner tube 14. A disc-shaped central portion 94 is provided at the center of the peripheral portion 92, and the peripheral portion 92 and the central portion 94 are connected by a predetermined number of rod-shaped connecting portions 96. The base end of the support column 28 is fixed to the center portion 94, and the hole plate 90 has a substantially fan-shaped hole 98 penetratingly formed between the peripheral portion 92, the center portion 94, and the connecting portion 96, so that the inner tube The passage of gas as fluid in 14 is permitted.

  In the first to fourth embodiments, the solid-gas two-phase flow in which solid particles and gas are mixed is supplied from the supply ports 24 and 86. A liquid-gas two-phase flow in which the gas and the gas are mixed may be supplied from the supply ports 24 and 86. Thereby, processing, such as coating of the inner surface of the pipe 50, can be performed. Further, only solid or liquid particles may be supplied from the supply ports 24 and 86.

It is sectional drawing which shows the nozzle part of the blasting apparatus which concerns on the 1st Embodiment of this invention. It is the bottom view seen from the front end side which shows the supply part of the blast apparatus which concerns on the 1st Embodiment of this invention. It is sectional drawing (3-3 sectional view of FIG. 2) which shows the supply part of the blasting apparatus which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the condition which inserted the nozzle part of the blasting apparatus which concerns on the 1st Embodiment of this invention in the pipe. It is sectional drawing which shows the nozzle part of the blasting apparatus which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the nozzle part etc. of the blasting apparatus which concerns on the 3rd Embodiment of this invention. It is the bottom view seen from the tip side showing the nozzle part of the blast device concerning a 3rd embodiment of the present invention. It is the bottom view seen from the tip side showing the nozzle part of the blast device concerning a 4th embodiment of the present invention. It is a bottom view which shows the hole plate which can be used instead of a perforated plate in the blasting apparatus which concerns on the 1st Embodiment thru | or 4th Embodiment of this invention.

Explanation of symbols

10 Blasting device (particle injection device)
14 Inner pipe (injection pipe)
16 Outer pipe (supply pipe)
22 injection port 24 supply port 26 perforated plate (support member)
28 Support pillar (support member)
30 Collision plate (impact)
38 Outer tube (flexible tube)
46 Inner tube (flexible tube)
60 Blasting device (particle injection device)
70 Blasting device (particle injection device)
72 Inner tube (flexible tube)
76 Outer tube (flexible tube)
80 Blasting device (granule injection device)
82 Outer pipe (supply pipe)
86 Supply port 90 Hole plate (support member)

Claims (7)

An injection pipe for injecting fluid from an injection port;
A collision body in which fluid ejected from the ejection port collides and is ejected around the ejection port;
A supply pipe for supplying particles from a supply port to a fluid jetted around the jet port by the collision body;
A granular material spraying device.   The granular material injection apparatus according to claim 1, wherein the collision body is disposed outside a range facing the supply port in a granular material supply direction from the supply port.   The granular material injection device according to claim 1, wherein the collision body uniformly ejects the fluid ejected from the ejection port around the ejection port.   The granular material injection apparatus according to any one of claims 1 to 3, wherein the supply pipe uniformly supplies the granular material from the supply port to the periphery of the injection port.   The granular material injection device according to any one of claims 1 to 4, wherein the supply pipe supplies the granular material from the supply port while swirling the entire periphery of the injection port.   The granular material injection device according to any one of claims 1 to 5, further comprising a support member that is fixed in the injection pipe and permits passage of fluid and supports the collision body. .   The granular material injection device according to any one of claims 1 to 6, further comprising a flexible tube connected to the injection tube and the supply tube and having flexibility.

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