Sand blasting gun and sand blasting system
Through the modularly designed sand blowing gun, the problem of the wear of vulnerable parts of traditional spray guns needs to be replaced by the entire spray gun, which achieves convenience of replacement and resource saving, and improves the quality of small hole sand blowing.
Patent Information
- Application Number
- CN202421258948.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-04
AI Technical Summary
Traditional inner hole sandblasting guns need to be replaced when vulnerable parts are severely worn, resulting in waste of resources and inconvenient replacement.
A modular sand blowing gun is designed, including a spray gun joint, a connector and a sand blowing tube. Each component can be detached and fixedly connected. The spray gun joint and connector can be made of cemented carbide or boron carbide material, with a hardness of ≥58HRC.
Through modular design, the replacement convenience of easily damaged parts is improved, manufacturing costs and replacement costs are saved, resource waste is reduced, and the manufacturing difficulty of small hole sand blown pipes is reduced.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sandblasting cleaning processing, and specifically relates to a sandblasting spray gun and a sandblasting system. Background Art
[0002] At present, sandblasting cleaning of metal parts is the most widely used cleaning method for special surface treatment processes. Sandblasting is mainly used to improve the adhesion of coatings or electroplating processes. However, due to the sandblasting angle, sandblasting will cause wear and tear, and the metal material in the sandblasting area usually has a certain degree of removal. There are certain differences in the removal amount of sandblasting of various particle sizes. For example: -F90 sand blasting usually has a removal amount of 10 to 15μm in the diameter direction, and the maximum may be 25μm; -F180 sand blasting usually has a removal amount of 5 to 10μm in the diameter direction, and the maximum may be 15μm. The change in removal amount depends on the base material and the hole cross-section.
[0003] In the sand blasting process, small inner hole sand blasting has always been a more difficult process. Small inner holes or deep blind holes generally require wear-resistant and anti-corrosion electroplating processes such as chrome plating, cadmium plating or cadmium titanium plating. The quality of sand blasting before inner hole plating is very important. Uneven sand blasting of the inner hole will lead to inadequate local activation, which will directly affect the quality, bonding strength or thickness of the electroplated coating. Traditional inner hole sand blasting guns are all integral structures, such as Figure 1 As shown, the structure generally adopts a joint, a nozzle and a nozzle connected in sequence, and the connection of these three parts is mostly connected by brazing or welding. The most vulnerable part of this traditional inner hole sandblasting spray gun is generally the gun head or the gun barrel. Once it is severely worn, the entire sandblasting spray gun needs to be replaced, which causes great waste, inconvenience in replacement and failure to fully utilize the intact parts of the spray gun. Utility Model Content
[0004] In view of the current technical problems, the utility model aims to provide a sand blasting spray gun and a spray gun system, which can solve the technical problem that when some parts are damaged, the entire spray gun needs to be replaced, causing great waste.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A sand-blasting spray gun, which has the following structural features: it comprises a spray gun joint, a connecting piece and a sand-blasting tube, wherein a through hole in the spray gun joint is connected to the sand-blasting tube; a truncated cone structure is provided at one end of the spray gun joint, and the small-diameter end of the truncated cone structure faces outward; a conical groove is provided at one end of the sand-blasting tube, and the large-diameter end of the conical groove faces outward; a penetrating mounting hole is provided in the connecting piece, and one end of the mounting hole is a contracted conical hole; one end of the spray gun joint with the truncated cone structure is arranged in the mounting hole, and the spray gun joint and the connecting piece are detachably fixedly connected; the conical groove is arranged between the conical hole and the truncated cone structure, and adjacent side walls abut against each other.
[0007] The spray gun joint and the connector can be made of hard materials such as heat-treated or hard alloy steel or boron carbide for the inner hole, and the hardness is required to be ≥58HRC. When assembling the sandblasting spray gun, the small diameter end of the sandblasting tube is passed through the mounting hole of the connector so that the outer wall of the conical groove abuts against the inner wall of the conical hole. Insert one end of the truncated cone structure of the spray gun joint into the mounting hole so that the outer wall of the truncated cone structure abuts against the inner wall of the conical groove, and the spray gun joint is fixedly connected to the connector, which can be detachably connected by means of threads, mechanical fit, etc. By fixing the spray gun joint to the connector, the end of the sandblasting tube is pressed and fixed by the connector and the spray gun joint, and at this time, the through hole of the spray gun joint is connected to the sandblasting tube. After the sandblasting spray gun is assembled, the spray gun joint is connected to the sandblasting tube configured for various sandblasting machines, and the sand particles are smoothly diverted and blown out through the through hole and the sandblasting tube to achieve the sandblasting effect of small inner holes. The sandblasting gun of the utility model has high versatility by modularizing various components, improving the convenience of replacing easily damaged components, making full use of the service life of various components, saving the manufacturing cost and replacement cost of the sandblasting gun, and reducing waste. The sandblasting gun of the utility model can replace different types of sandblasting tubes, realizing that one type of joint can replace different types of sandblasting tubes, improving the traditional one-to-one overall structure to a one-to-many transfer type, reducing the manufacturing difficulty of small hole sandblasting tubes, and playing a vital role in the quality of sandblasting on the inner wall of small holes with a diameter of ≥8mm.
[0008] Preferably, the spray gun connector is provided with a first external thread section, the mounting hole is provided with an internal thread section matching the first external thread section, and the spray gun connector and the mounting hole are connected by threads.
[0009] Preferably, a gasket is provided at the connection between the spray gun joint and the mounting hole. The gasket can be a rubber gasket. The provision of the gasket can effectively prevent external sand particles from entering the threaded structure and provide a matching adjustment gap for replacing different sand blowing pipes.
[0010] Preferably, the thread pitch of the first external thread segment and the internal thread segment are both 1.0 mm to 1.5 mm, and the length of the first external thread segment is greater than the length of the internal thread segment. Generally, the length of the first external thread segment>the length of the internal thread segment+2 mm can be adopted to prevent the first external thread segment and the internal thread segment from being stuck by sand particles during sandblasting.
[0011] Specifically, the spray gun connector is provided with a boss structure, which is arranged on a side away from the truncated cone structure and located outside the first external thread section. The boss structure matches the adjustable wrench, and when the spray gun connector is threadedly connected to the connecting piece, the adjustable wrench can be used to clamp and tighten it.
[0012] Preferably, the angle between the axis of the truncated cone structure and the generatrix is 15° to 35°.
[0013] Preferably, one end of the through hole close to the truncated cone structure is a cylindrical hole, and the other end is an outwardly expanded trumpet-shaped hole, and the diameter of the cylindrical hole is 6 mm to 10 mm.
[0014] Preferably, the central axis of the through hole is colinear with the central axis of the sand blasting tube.
[0015] Preferably, a second external thread section is provided at one end of the spray gun connector facing the truncated cone structure. The second external thread section can facilitate the detachable and fixed connection between the spray gun connector and the sandblasting pipe configured by the sandblasting machine through threads.
[0016] Based on the same inventive concept, the utility model also provides a sandblasting system, including a sandblasting machine, a sandblasting pipe connected to the sandblasting machine, and the sandblasting spray gun as described above, wherein the spray gun joint is detachably fixedly connected to the sandblasting pipe, and the sandblasting pipe is connected to the through hole. The spray gun joint and the sandblasting pipe can be connected by threads.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] 1. The sandblasting spray gun of the utility model has high versatility by modularizing various components, improves the convenience of replacing easily damaged components, fully utilizes the service life of various components, saves the manufacturing cost and replacement cost of the sandblasting spray gun, and reduces waste.
[0019] 2. The sand blasting spray gun of the utility model can replace different types of sand blasting tubes, realizing that one type of joint can replace different types of sand blasting tubes, improving the traditional one-to-one integral structure to a one-to-many transfer type, reducing the manufacturing difficulty of small-hole sand blasting tubes, and playing a vital role in the quality of sand blasting on the inner wall of small holes with a diameter of ≥8mm.
[0020] 3. The sandblasting spray gun of the utility model can effectively prevent the jamming of sand particles by coordinating the thread structures of various components. The use of rubber gaskets can effectively prevent foreign sand particles from entering the thread structure, and provide a matching adjustment gap for replacing different sandblasting tubes.
[0021] 4. The sandblasting spray gun of the utility model has a simple structure, is easy to manufacture, has a high reuse rate, improves work efficiency and the accuracy of test results, and also provides a simple and economical solution for the later maintenance of the sandblasting spray gun. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the structure of a traditional sandblasting gun;
[0023] Figure 2 This is a schematic diagram of the structure of the sand blasting gun of the utility model;
[0024] Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure of the middle spray gun joint;
[0025] Figure 4 for Figure 3 A schematic cross-sectional structure diagram of ;
[0026] Figure 5 for Figure 2 Schematic diagram of the three-dimensional structure of the middle connector;
[0027] Figure 6 for Figure 5 A schematic cross-sectional structure diagram of ;
[0028] Figure 7 for Figure 2 Schematic diagram of the structure of the middle sand blowing tube;
[0029] Figure 8 for Figure 2 Schematic diagram of the middle gasket structure.
[0030] In the figure:
[0031] 1-spray gun connector; 101-through hole; 102-cone structure; 103-first external thread section; 104-second external thread section; 105-boss structure; 2-connector; 201-mounting hole; 202-conical hole; 203-internal thread section; 3-sand blowing pipe; 301-conical groove; 4-gasket; 5-connector; 6-spray pipe; 7-spray nozzle. DETAILED DESCRIPTION
[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.
[0033] like Figure 1 As shown, the conventional sandblasting spray gun is connected by welding a joint 5, a nozzle 6 and a nozzle 7 in sequence. When one of the components is seriously worn, the entire sandblasting spray gun needs to be replaced.
[0034] like Figure 2 As shown, a sandblasting gun provided in this embodiment includes a gun joint 1, a connector 2, a sandblasting tube 3 and a gasket 4, and each component is mechanically matched without any welding connection structure. Figure 3 and Figure 4 As shown, the spray gun joint 1 is reasonably designed according to the sandblasting pipe joint structure and the required inner hole size. The right end of the spray gun joint 1 is provided with a second external thread section 104, which matches the internal thread of the sandblasting pipe equipped with various sandblasting machines. The outer diameter D of the second external thread section 104 = the outer diameter d of the sandblasting pipe + (4-8mm), which can effectively fasten the spray gun joint 1 to the sandblasting pipe. A flat boss structure 105 is provided on the left side of the second external thread section 104, and the boss structure 105 is matched with an adjustable wrench to clamp and fasten the spray gun joint 1. A first external thread section 103 is provided on the left side of the boss structure 105, and the thread pitch is selected to be 1.0-1.5mm. The left end of the spray gun joint 1 is a truncated cone structure 102, and the angle between the axis of the truncated cone structure 102 and the generatrix is 30°. The length of the truncated cone structure 102 is 2mm. The spray gun connector 1 is provided with a through hole 101, one end of the through hole 101 close to the truncated cone structure 102 is a cylindrical hole, and the other end is an outwardly expanded trumpet-shaped hole, and the diameter of the cylindrical hole is 6mm to 10mm. The spray gun connector 1 needs to be heat-treated or made of hard alloy steel or the inner hole is made of hard materials such as boron carbide, and the hardness is required to be ≥58HRC.
[0035] like Figure 5 and Figure 6 As shown, the connecting member 2 is provided with a through mounting hole 201, one end of the mounting hole 201 is a contracted tapered hole 202, and the other end is provided with an internal thread section 203, and the internal thread section 203 matches the first external thread section 103. Figure 2 and Figure 8As shown, a gasket 4 is provided at the connection between the spray gun connector 1 and the mounting hole 201. The gasket 4 is a rubber gasket. The rubber gasket is used to adjust the sealing gap between the connector 2 and the spray gun connector 1. It can be clamped and replaced with sand blasting tubes 4 of different sizes and specifications, and is used to prevent foreign sand particles from entering the thread and causing jamming during the sand blasting process. The pitch of the internal thread section 203 is selected to be 1.0-1.5mm, and the thread length of the first external thread section 103 is greater than the thread length of the internal thread section 203 + 2mm, which is used to prevent the thread from being jammed by sand particles during the sand blasting process. The tapered hole 202 needs to ensure a roughness of Ra0.8. This requirement is mainly used for high-requirement matching dimensions. This part is the key matching dimension of the sand blasting spray gun, and the matching tolerance is selected to be H8. In order to facilitate fastening and disassembly, the outer circle of the connector 2 is designed with a flat rotating structure, which is made of hard materials such as hard alloy steel or boron carbide, which needs to be heat treated or the inner hole is made of hard materials, and the hardness is required to be ≥58HRC.
[0036] like Figure 7 As shown, a conical groove 301 is provided at one end of the sand blasting tube 3, and the conical groove 301 is used to press and fix the connecting piece 2 and the spray gun joint 1 to prevent the sand blasting tube 3 from shaking during use and causing scratches on the inner hole of the part. The conical groove 301 is arranged between the conical hole 202 and the truncated cone structure 102, and the adjacent side walls abut against each other. The outer diameter and inner hole size of the sand blasting tube 3 are respectively related to the inner diameter of the spray gun joint 1 and the inner hole size of the part to be processed. The outer diameter size of the sand blasting tube 3 must be greater than or equal to the inner diameter size of the spray gun joint 1 plus 3mm, and the outer diameter size of the sand blasting tube 3 needs to be less than 80% of the inner hole diameter of the processed part.
[0037] A sandblasting system includes a sandblasting machine, a sandblasting pipe connected to the sandblasting machine and the sandblasting spray gun as described above, wherein the spray gun joint 1 is detachably fixedly connected to the sandblasting pipe via threads, and the sandblasting pipe is connected to a through hole 101.
[0038] The assembly method of the sandblasting spray gun of the utility model is as follows: firstly, the gasket 4 is put on the first external thread section 104 of the spray gun joint 1, and then the sandblasting tube 3 is passed through the inner hole of the mounting hole 201 of the connecting piece 2 for simple matching; the matched connecting piece 2 and the sandblasting tube 3 are tightly matched with the first external thread 104 of the spray gun joint 1, and the movable wrench is clamped at the boss structure 105 for further tightening; at this time, the conical groove 301 of the sandblasting tube 3 is pressed and fixed by the conical hole 202 of the connecting piece 2 and the truncated cone structure 102 of the spray gun joint 1, and the through hole 101 is connected with the sandblasting tube 3; the matched connecting piece 2 and the truncated cone structure 102 of the spray gun joint 1 are fixed, and the through hole 101 is connected with the sandblasting tube 3; Figure 1 The matching body shown is threadedly fastened to the sandblasting pipe joint of the sandblasting machine.
[0039] During the use of the sandblasting gun, the sandblasting tube 3 is a vulnerable part, which is prone to defects such as holes and perforations, and the sandblasting tube 3 needs to be disassembled and replaced in time. Compared with the traditional sandblasting device, the sandblasting gun of the utility model has a simple structure, can make full use of the main structure of the gun, greatly facilitates the replacement operation process of vulnerable structures such as the sandblasting tube 3, and reduces the cost of small inner hole sandblasting guns.
[0040] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.
Claims
1. A sand blasting gun, characterized in that: It comprises a spray gun joint (1), a connecting piece (2) and a sand blowing pipe (3), wherein a through hole (101) in the spray gun joint (1) is connected to the sand blowing pipe (3); A truncated cone structure (102) is provided at one end of the spray gun joint (1), and the small diameter end of the truncated cone structure (102) faces outwards; One end of the sand blasting pipe (3) is provided with a conical groove (301), and the large diameter end of the conical groove (301) faces outwards; The connecting piece (2) is provided with a penetrating mounting hole (201), and one end of the mounting hole (201) is a contracted tapered hole (202); One end of the spray gun connector (1) having a truncated cone structure (102) is arranged in the mounting hole (201), and the spray gun connector (1) is detachably fixedly connected to the connecting piece (2); The conical groove (301) is arranged between the conical hole (202) and the truncated cone structure (102), and adjacent side walls abut against each other.
2. The sandblasting gun according to claim 1, characterized in that: The spray gun connector (1) is provided with a first external thread section (103), the mounting hole (201) is provided with an internal thread section (203) matching the first external thread section (103), and the spray gun connector (1) and the mounting hole (201) are connected via threads.
3. The sandblasting gun according to claim 2, characterized in that: A gasket (4) is provided at the connection between the spray gun joint (1) and the mounting hole (201).
4. The sandblasting gun according to claim 2, characterized in that: The thread pitches of the first external thread section (103) and the internal thread section (203) are both 1.0 mm to 1.5 mm, and the length of the first external thread section (103) is greater than the length of the internal thread section (203).
5. The sandblasting gun according to claim 2, characterized in that: The spray gun joint (1) is provided with a boss structure (105), which is arranged on a side away from the truncated cone structure (102) and is located outside the first external thread section (103).
6. The sandblasting gun according to claim 1, characterized in that: The included angle between the axis of the truncated cone structure (102) and the generatrix is 15° to 35°.
7. The sandblasting gun according to claim 1, characterized in that: One end of the through hole (101) close to the truncated cone structure (102) is a cylindrical hole, and the other end is an outwardly expanded trumpet-shaped hole. The diameter of the cylindrical hole is 6 mm to 10 mm.
8. The sandblasting gun according to claim 1, characterized in that: The central axis of the through hole (101) is colinear with the central axis of the sand blasting tube (3).
9. The sandblasting gun according to claim 1, characterized in that: A second external thread section (104) is provided on the end of the spray gun joint (1) facing the truncated cone structure (102).
10. A sandblasting system, comprising a sandblasting machine and a sandblasting tube connected to the sandblasting machine, characterized in that: It also comprises a sandblasting spray gun as claimed in any one of claims 1 to 9, wherein the spray gun joint (1) is detachably fixedly connected to a sandblasting tube, and the sandblasting tube is connected to the through hole (101).