KR102385313B1 - Non reaction shot blasting device - Google Patents

Abstract

The present invention provides a shot-blasting device without recoil to secure the stability and safety of work by offsetting a repulsive force generated when injecting shots to a target. The shot-blasting device without recoil includes a shot injection nozzle receiving shots from the outside to inject the shots to the outside to process the surface of a target. The shot injection nozzle includes: a support pipe wherein both ends thereof are penetrated and one end thereof is bound to and fixed on a supply end of a supply hose through which the shots are supplied; an injection pipe provided to move forward and backward while penetrating the inside of the support pipe, and injecting the shots supplied through the supply hose to the outside; and an elastic means interposed between the support pipe and the injection pipe, and elastically supporting the injection pipe moving forward and backward in accordance with an injection repulsion pressure entering the injection pipe.

Description

Non-reaction shot blasting device

The present invention relates to a recoilless shot blasting apparatus configured to perform a blasting operation for grinding or cleaning the surface of an object by spraying a shot on an object such as a ship.

Specifically, it relates to a recoilless shot blasting device that is designed to offset the repulsive force generated during the injection of a shot to an object to ensure stability and safety of work.

More specifically, it relates to a recoilless shot blasting device configured to implement structural stability by preventing damage due to penetration of a shot made of small particles.

In general, the shot blast (shot blast) is a shot (shot) such as steel grit (steel grit), hard grain natural sand, sand such as silica sand, abrasive, etc. compressed air, centrifugal force, other methods, such as metal to be processed It is a surface processing device designed to grind or clean the surface of an object by hitting it vigorously on the surface of the object to completely remove the scale, rust, and coating film.

For example, in order to clean the surface of the object or to form irregularities on the surface of the object for good painting, a shot is sprayed through a nozzle as one of the pretreatment processes of the metal surface to remove mill scale and make roughness on the surface of the object. .

In such shot blasting, the shot moves at high speed on a long hose from the blasting device and is sprayed through the nozzle connected to the tip of the hose, that is, the straightness and speed are controlled. Projecting towards the surface of the object.

At this time, it has a nozzle that is mounted on the end of the hose connected to the blasting equipment during the shot blasting operation to accurately process the amount of the projecting agent for the object and the work range of the object, and the nozzle simultaneously projects the compressed air and the combustion agent onto the surface of the object There are direct pressure nozzles.

In Korean Patent Application No. 10-2019-0177377 (name: hose assembly for shot blasting/2019.12.30.), as known in the publication, in the hose assembly for shot blasting, the front side connected to the nozzle among the hoses A handle that is formed at the end of the handle and increases the frictional resistance of the surface to make it easy to grip and prevents slipping of the hand It is provided to move and maintain a specific position with respect to the hose within a certain range along the longitudinal direction of the hose from the back of the protective cap to protect the hand and the handle, and to carry the hose on the shoulder or hang it on the shoulder for working A hose assembly for shot blasting comprising a holder with shoulder straps is disclosed.

And in Korean Utility Model Application No. 20-2004-0022178 (name: air cylinder type direct pressure blast gun device / 2004.08.03.), as known in the publication, in the blast gun device, the nozzle is held The gun body is equipped with a connecting passage to which the hose of the compressor is connected and an air cylinder, and a solenoid for controlling whether or not air is supplied to the air hose of the air cylinder is mounted. A blast gun device is described which is equipped with a connecting hose nipple or connecting rod.

On the other hand, in Korean Patent Application No. 10-2020-0036302 (Name: Blasting apparatus for painting removal of steel structures and removal method using the same / 2020.03.25.), as is known in the publication, an abrasive supply tank for supplying abrasives, A transfer hose through which the abrasive supplied from the abrasive supply tank is transferred, a compressor providing high-pressure air, a high-pressure hose through which the high-pressure air supplied from the compressor is transferred, and a spray nozzle device connected to the transfer hose and the high-pressure hose to inject the abrasive As composed of, the spray nozzle device sprays an abrasive at high pressure, and a spray nozzle body having a first ball joint and a second ball joint on the outer circumferential surface, respectively, and a blast device provided on the outside of the spray nozzle body are described. there is.

In addition, in Korea Patent Application No. 10-2011-0109831 (name: blasting nozzle assembly / 2011.10.26.), as is known in the publication, a nozzle; and an adjustment member mounted on the nozzle so as to be movable in the longitudinal direction of the nozzle and configured to control a spraying area of the material discharged from the nozzle, wherein the adjusting member includes a body part movable in the longitudinal direction of the nozzle. Wow; a diffusion member provided to be spaced apart from the body and having a larger cross-sectional area as the distance from the body increases; A blasting nozzle assembly including a connecting member for fixing the diffusion member to the body is described.

Korean Patent Application No. 10-2019-0177377 (2019.12.30.) Korean Utility Model Application No. 20-2004-0022178 (2004.08.03.) Korean Patent Application No. 10-2020-0036302 (2020.03.25.) Korean Patent Application No. 10-2011-0109831 (2011.10.26.)

However, in the conventional recoilless shot blasting devices as described above, an excessive load is applied to the operator in the injection part (nozzle) by the repulsive force generated during injection of the shot to the object, so that the injection part bounces or oscillates. As the accident occurred, there was a problem in that the stability and safety of the work could not be secured.

In addition, as the shot made of small particles penetrated into the inside of the injection unit (nozzle) and structural damage occurred, there was a problem in that structural stability was lowered.

The present invention has been proposed to solve the problems of the prior art, and an object of the present invention is to perform a blasting operation of grinding or cleaning the surface of an object by spraying a shot to an object such as a ship. That is, to provide a recoilless shot blasting device to offset the repulsive force generated during the injection of the shot to the object to ensure the stability and safety of the work.

Another object of the present invention is to provide a recoilless shot blasting device to implement structural stability by preventing damage due to penetration of shots made of small particles.

The recoilless shot blasting device according to the present invention for achieving the object of the present invention as described above is a recoilless shot blasting device comprising a; in; The shot injection nozzle includes: a support pipe body having both ends penetrated and one end fixed to the supply end of the supply hose to which the shot is supplied; an injection tube body provided to move forward and backward while penetrating the inside of the support tube and configured to spray the shot supplied through the supply hose to the outside; and an elastic means disposed between the support tube body and the injection tube body and configured to elastically support the injection tube body moving forward and backward according to the injection repulsion pressure introduced into the injection tube body.

The recoilless shot blasting device according to the present invention made as described above, when performing a blasting operation by spraying a shot to an object such as a ship, elastically supports the repulsive force generated when the shot is sprayed to the object by an elastic means As the injection tube body is offset while moving forward and backward, it has the effect of securing the stability and safety of the work.

In addition, it has the effect of implementing structural stability by forming a seal to the outside so that shots such as abrasives composed of small particles do not penetrate into the inside without permission.

1 is a schematic perspective view showing a recoilless shot blasting device according to an embodiment according to the present invention.
Figure 2 is a schematic perspective view showing a recoilless shot blasting device according to the present embodiment.
Figure 3 is a schematic illustration showing a recoilless shot blasting device according to this embodiment.
4 and 5 is a schematic illustration showing the working state of the recoilless shot blasting device according to this embodiment.
Figure 6 is a schematic illustration showing a recoilless shot blasting device according to another embodiment according to the present invention.
Figure 7 is a schematic illustration showing the operating state of the recoilless shot blasting device according to another embodiment.
8 is a schematic illustration showing another example of the shot injection nozzle constituting the recoilless shot blasting device according to the present embodiment.

Hereinafter, with reference to the accompanying drawings, a recoilless shot blasting device according to a preferred embodiment according to the present invention will be described in detail as follows.

Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. Detailed descriptions of well-known functions and configurations determined to unnecessarily obscure the gist of the present invention will be omitted.

1 to 5 are views showing a recoilless shot blasting device 1 according to an embodiment according to the present invention, and the recoilless shot blasting device 1 according to this embodiment is a steel grit ( Steel grit), hard particle natural sand, sand such as silica sand, shot (10) such as abrasive, etc. is sprayed at high pressure through compressed air to grind or clean the surface of the object. applies to

The recoilless shot blasting device 1 according to this embodiment includes a shot injection nozzle 2 configured to receive the shot 10 from the outside and spray it to the outside to process the surface of the object.

That is, while the shot 10 is supplied through the supply hose 100 in a high-pressure state by compressed air from the outside, the high-pressure is injected through the shot injection nozzle 2 .

Accordingly, while the shot 10 applies an impact load to the object, various foreign substances and rust formed on the surface are removed while grinding or cleaning.

In the recoilless shot blasting apparatus 1 according to the present embodiment made as described above, the shot injection nozzle 2 has both ends penetrated and one end is bound to the supply end of the supply hose 100 to which the shot 10 is supplied. a fixed support tube body 21; an injection pipe body 22 provided to be able to advance and retreat while penetrating the inside of the support pipe body 21 and configured to spray the shot 10 supplied through the supply hose 100 to the outside; An elastic means disposed between the support tube body 21 and the injection tube body 22 and configured to elastically support the injection tube body 22 that moves forward and backward according to the injection repulsion pressure introduced into the injection tube body 22 . (3); can be included.

That is, while the injection tube body 22 is elastically supported by the support tube body 21 by the elastic means 3 , it elastically moves forward and backward when it is oscillated by the repulsive force generated during injection of the shot 10 .

Accordingly, the repulsive force generated during the injection of the shot 10 to the object is offset, thereby securing the stability and safety of the operation.

In the above, the inner circumferential surface of the injection tube body 22 may be composed of a configuration and structure of a 'diffusion nozzle' that compresses and then diffuses the shot 10 supplied through the supply hose 100. ; It is preferable to be appropriately applied according to a user's selection from among the conventionally known techniques.

In the above, the elastic means 3 may be made of the configuration and structure of a 'coil spring'; It is preferable to be appropriately applied according to a user's selection from among the conventionally known techniques.

In the above, the support pipe body 21 is bound to the supply hose 100 to receive the shot 10, and the inner diameter is a binding having a size that is linearly movably fitted while the outer circumferential surface of the injection pipe body 22 is in close contact. a tube 211; It is integrally connected to the front end of the binding tube 211 and the elastic means 3 is fitted and bound to the inner circumferential surface, and the support flange 221 extending outwardly from the distal end outer circumferential surface of the injection tube body 22 is in close contact with the guide movement It may be made to include a; advancing and retreating pipe 212 having a size that is possibly tailored.

That is, the injection pipe body 22 passes through the inside of the support pipe body 21, but the support flange 221 is accommodated in a linear reciprocating motion on the inner surface of the advancing and retreating pipe 212, while the elastic means (3) It can be bound while being elastically supported through the

Accordingly, the injection pipe body 22 may be elastically coupled to the inside of the support pipe body 21 to move forward and backward.

In the recoilless shot blasting device 1 according to this embodiment made as described above, at the tip of the advancing and retreating pipe 212, while supporting the support flange 221 on the inside, it is in close contact with the outer circumferential surface of the injection pipe body 22 In a state in which the tip bush 24 is embedded, the tip cap 23 to implement sealing with the outside may be fastened.

That is, while the support flange 221 of the injection tube body 22 is supported by the tip cap 23, the injection tube body 22 is prevented from being continuously separated to the outside to ensure structural stability, as well as It is possible to prevent the shot 10 injected to the outside through the front end bushing 24 from being reversely introduced into the gap (gap) between the support pipe body 21 and the injection pipe body 22 and being damaged.

On the other hand, at the rear end of the injection tube body 22, a support ring 25 having an outer diameter supported by the rear end of the binding tube 211 and having an inner diameter equal to or larger than the inner diameter of the injection tube body 22 is provided. It may be fastened to adjust the linear movement interval of the injection tube body 22 while preventing the injection tube body 22 from being excessively bombarded by the elastic means 3 .

That is, the tip of the injection pipe body 22 is supported by the tip cap 23 or the tip bush 24; The rear end is supported through the rear end of the binding tube 211 by the support ring 25 , so that the injection tube body 22 can be stably maintained in a coupled state inside the support tube body 21 , , structural stability can be further secured.

In the recoilless shot blasting device 1 according to the present embodiment made as described above, the shot 10 supplied through the supply hose 100 in the advancing and retreating pipe 212 of the support pipe body 21 is the binding A rear end bush 26 to be sealed so as not to penetrate through the tube 211 may be provided.

That is, it is possible to further secure structural stability by preventing the shot 10 from penetrating into the inside of the advancing and retreating pipe 212 through the rear end bush 26 .

In addition, the elastic means 3 and the support flange 221 are respectively located between the front end bushing 24 and the rear end bushing 26 inside the advancing and retreating pipe 212 to be sealed to the outside. Accordingly, since the shot 10 does not penetrate without permission, the stability of the forward/backward operation of the injection tube body 22 can be secured, thereby realizing the reliability of the quality of use.

In the recoilless shot blasting device 1 according to this embodiment made as described above, as shown in FIGS. 6 and 7, the tip of the injection tube body 22 of the shot injection nozzle 2 at the tip is to the outside. The device body 4 is provided in an exposed state and installed by the user's hand. It may further include.

That is, the user may hold the device body 4 by hand and perform the shot blasting operation while positioning the tip of the injection tube body 22 of the shot injection nozzle 2 in the direction toward the object.

In the above, the device body 4 includes a tip fixing part 41 to which the shot injection nozzle 2 is fixed; It may be made including; Inside the mounting body 42, the supply hose 100 is received and coupled while being spatially connected to the tip fixing part 41, so as to supply the shot 10 to the shot injection nozzle 2 there is.

In the above, the lower side of the lower end of the mounting body 42, the lower support handle 421 is provided with a user gripping the lower portion of the shot injection nozzle (2) to be installed; An upper support handle 422 configured to press and support the user's other hand on the upper part of the shot injection nozzle 2 may be provided on one side of the upper end.

That is, through the lower support handle 421 and the upper support handle 422, the user uses both hands to support the mounting body 42 at the lower and upper portions of the shot injection nozzle 2, respectively. can

Accordingly, even if a safety accident occurs in which the shot injection nozzle 2 rapidly fluctuates according to a change in the pressure of the compressed air spraying the shot 10 during continuous injection of the shot 10, the mounting body ( 42) to be stably fixed, it is possible to prevent the occurrence of a safety accident in advance.

At this time, when the shot blasting operation is performed by spraying the shot injection nozzle 2 in the form of 'directed shooting', the shot injection nozzle 2 is prevented from rapidly swinging in the vertical direction, thereby improving the work quality can be made

In the above, the mounting body 42 may be provided with an 'operating lever' 423 that allows the user to selectively operate the opening/closing operation of the opening/closing valve 43 to open and close the supply hose 100 with a finger. , it is preferable to be appropriately applied according to the user's selection.

That is, when the operator does not press the on/off valve 43 with a finger, the supply hose 100 is forcibly closed to forcibly stop the injection of the shot 10 to prevent a safety accident in advance. It is possible to do it, and it is preferable to be appropriately applied according to the user's selection.

In the above, the upper support handle 422 is bent at the upper end of the mounting body 42, one side is opened, and the user's hand is accommodated therein to support the back of the user's hand from the upper part. there is.

That is, as the user's hand is inserted into the bending rod, the back of the hand is supported by the bottom surface of the bending rod while attaching the upper surface of the mounting body 42 with the palm of the hand, and the shot injection nozzle 2 rapidly moves up and down. When it oscillates, it is possible to prevent the user's hand from being separated from the inside of the bending rod without permission, thereby further securing the stability of the operation.

In the recoilless shot blasting apparatus 1 according to this embodiment made as described above, the tip cap 23 has the tip of the shot injection nozzle 2 accommodated therein, as shown in FIG. 8, while the shot injection A guide tube 5 of a 'SLEEVE' shape to guide the shot 10 sprayed from the nozzle 2 in the forward direction may be bound.

That is, when the shot 10 injected in the process of the forward and backward movement of the injection tube body 22 of the shot injection nozzle 2 is excessively bounced, it is divided while guiding it in the forward direction through the guide tube 5. This can further realize the stability and safety of work.

As described above, in the recoilless shot blasting device 1 according to this embodiment, the injection repulsion pressure formed while the shot 10 is injected into the object through the shot injection nozzle 2 is the injection tube body 22. It is characterized in the technical configuration that the elastic means (3) to offset while elastically moving forward and backward in the support tube body (21).

One embodiment of the present invention described above is merely exemplary, and those of ordinary skill in the art to which the present invention pertains will appreciate that various modifications and equivalent other embodiments are possible therefrom. . Therefore, it will be well understood that the present invention is not limited to the form mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. Moreover, it is to be understood that the present invention covers all modifications, equivalents and substitutions falling within the spirit and scope of the invention as defined by the appended claims.

1: recoilless shot blasting device
10: short 100: supply hose
2: short injection nozzle 21: support pipe
211: binding hall 212: advance and retreat hall
22: injection pipe body 221: support flange
23: tip cap 24: tip bush
25: support ring 26: rear end bush
3: elastic means 4: device body
41: tip fixing part 42: mounting body
421: lower support handle 422: upper support handle
423: operation lever 43: on-off valve
5: guide tube

Claims (1)

A support pipe body 21 that receives the shot 10 from the outside and sprays it to the outside to process the surface of the object, and has one end fixed to the supply end of the supply hose 100 to which the shot 10 is supplied. And, the injection tube body 22 which is provided so as to be able to advance and retreat while penetrating the inside of the support tube body 21 and spray the shot 10 to the outside, and the support tube body 21 and the injection tube body 22 A short injection nozzle (2) disposed between and provided with an elastic means (3) configured to elastically support the injection tube body (22) moving forward and backward according to the injection repulsion pressure introduced into the injection tube body (22); including;
The support tube body 21 is bound to the supply hose 100 so as to receive the shot 10, and has an inner diameter of which the outer circumferential surface of the injection tube body 22 is in close contact with a binding tube having a size to be movably aligned. (211) and the support flange 221 integrally connected to the front end of the binding pipe 211, the elastic means 3 is fitted to the inner circumferential surface, and extending outwardly from the distal end outer circumferential surface of the injection pipe body 22. It includes an advancing and retreating pipe 212 having a size that is fit while being in close contact with a guide movement;
In the advancing and retreating pipe 212, a tip cap configured to implement sealing with the outside while supporting the support flange 221 on the inside is embedded with a tip bush 24 that is in close contact with the outer circumferential surface of the injection pipe body 22 Recoilless shot blast provided with a rear end bush 26 to which 23 is fastened, and the shot 10 supplied through the supply hose 100 is sealed so as not to penetrate through the binding pipe 211 without permission. In device (1);
The device body (4) provided with the tip of the injection tube body (22) of the shot injection nozzle (2) exposed to the outside at the tip and installed by the user's hand; further comprising;
The device body (4),
a tip fixing part 41 to which the shot injection nozzle 2 is fixed; an attachment body 42 configured to be attached by a user's hand to the rear end of the tip fixing part 41;
Inside the mounting body 42,
While spatially connected to the tip fixing part 41, the supply hose 100 is received and coupled to supply the shot 10 to the shot injection nozzle 2;
On one side of the lower end of the mounting body 42,
A lower support handle 421 is provided at the lower portion of the shot injection nozzle 2 so that the user can grip it with his or her hand;
On one side of the upper end of the mounting body 42,
an upper support handle 422 configured to press and support the user's other hand on the upper portion of the shot injection nozzle 2 is provided;
In the mounting body 42,
An operation lever 423 is provided so that the user can selectively operate the supply hose 100 with a finger by an opening/closing operation of the opening/closing valve 43;
The upper support handle 422 is,
It is formed by bending at the upper end of the mounting body 42, and while one side is opened, the user's hand is accommodated therein and consists of a 'bending rod' configured to support the back of the user's hand from the upper part;
In the tip cap 23,
A 'SLEEVE'-shaped guide tube (5) configured to guide the shot (10) sprayed from the shot injection nozzle (2) in the forward direction while the tip of the shot injection nozzle (2) is accommodated therein A recoilless shot blasting device, characterized in that it is bound.

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