A sandblasting gun

Abstract

This utility model relates to a sandblasting gun, comprising: an air inlet assembly, the air inlet assembly including a straight pipe, an air pipe connector formed at the outer end of the straight pipe, a cone formed at the inner end of the straight pipe, and an air passage formed within the straight pipe and extending through the air pipe connector and the cone; a sand inlet assembly, the sand inlet assembly including an outer shell sleeve fitted over the straight pipe and forming a receiving space therewith, a transition sleeve fitted between one end of the straight pipe and the outer shell sleeve, a sand inlet pipe formed on the outer wall of the outer shell sleeve, a sand inlet connector formed at the outer end of the sand inlet pipe, and a sand inlet channel formed within the sand inlet pipe and the sand inlet connector and communicating with the receiving space; and an ejection assembly. This allows the sand to be fully mixed within the receiving space before being ejected, thereby improving the uniformity of sandblasting and enhancing the surface treatment effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of sandblasting equipment and relates to a sandblasting gun. Background Technology

[0002] A sandblasting gun uses compressed air to create a high-speed jet of abrasive material (such as copper ore sand, quartz sand, iron sand, sea sand, and corundum) that is propelled at high speed onto the surface of a workpiece, altering its appearance. Due to the impact and cutting action of the abrasive on the workpiece surface, it achieves a certain degree of cleanliness and varying roughness, improving the workpiece's mechanical properties. This enhances the workpiece's fatigue resistance, increases adhesion between the workpiece and coatings, extends coating durability, and also facilitates paint leveling and decoration. Sandblasting guns are mainly divided into two types: high-pressure sandblasting guns and standard-pressure sandblasting guns.

[0003] Chinese utility model patent application number 201721105996.8 discloses a negative pressure center-feed sandblasting gun, comprising: a sand supply pipe, a wear-resistant sand supply nozzle, a wear-resistant sand blasting nozzle, and a sandblasting gun body. The sand supply pipe is located at the end of the sandblasting gun body, and the wear-resistant sand supply nozzle is located at the front end of the sand supply pipe and extends into the sandblasting gun body. An air supply branch pipe is integrally provided on one side of the sandblasting gun body, and an air supply pipe is connected to the end of the air supply branch pipe. The wear-resistant sand blasting nozzle is located at the front end of the sandblasting gun body. The wear-resistant sand blasting nozzle and the air supply branch pipe are connected through the sandblasting gun body, forming a negative pressure zone at the front end of the wear-resistant sand supply nozzle. However, this sandblasting gun uses center sand inlet and side air inlet. Although this can concentrate the sand particles, the sand particle flow rate is small, and the mixing uniformity with the air is poor, resulting in poor surface treatment effect. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sandblasting gun.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sandblasting gun, comprising:

[0006] An air intake assembly, the air intake assembly including a straight pipe, an air pipe connector formed at the outer end of the straight pipe, a cone formed at the inner end of the straight pipe, and an air passage opened in the straight pipe and extending through the air pipe connector and the cone.

[0007] The sand inlet assembly includes an outer shell sleeve that is sleeved outside the straight pipe and forms a receiving space therewith, a transition sleeve sleeved between one end of the straight pipe and the outer shell sleeve, a sand inlet pipe formed on the outer wall of the outer shell sleeve, a sand inlet connector formed at the outer end of the sand inlet pipe, and a sand inlet channel formed in the sand inlet pipe and the sand inlet connector and connected to the receiving space.

[0008] The ejection assembly includes at least a nozzle installed at the other end of the housing, wherein the nozzle has an ejection channel communicating with the receiving space, and the axis of the ejection channel coincides with the axis of the air passage.

[0009] Ideally, the angle between the centerline of the sand inlet channel and the centerline of the ejection channel is 120~160°.

[0010] Furthermore, the diameter of the cone gradually decreases in the direction away from the tracheal connector.

[0011] Furthermore, the airflow passage includes a first air inlet located at the center of the cone and a second air inlet located at the center of the straight pipe and extending through the air pipe connector. The first air inlet and the second air inlet are smoothly connected, and the diameter of the second air inlet is larger than the diameter of the first air inlet.

[0012] Furthermore, a snap-fit ​​groove is provided on the outer circumferential surface of the straight tube, and the adapter sleeve is connected to the straight tube by a plurality of fasteners that snap into the snap-fit ​​groove.

[0013] Optimally, the ejection assembly further includes a nozzle retaining ring mounted on the other end of the housing, with one end of the nozzle mounted inside the nozzle retaining ring.

[0014] Furthermore, one end of the nozzle is provided with an inwardly recessed frustum-shaped notch (33) corresponding to the cone head, and the frustum-shaped notch is connected to the ejection channel.

[0015] The beneficial effects of this application are: the sandblasting gun of this utility model adopts an air intake component, a sand intake component and an ejection component with a specific structure, so that the ejection channel and the air passage are on the same straight line and the sand intake pipe is located on the side of the outer shell. This allows the sand to be fully mixed in the containment space before being ejected, thereby improving the uniformity of sandblasting and improving the surface treatment effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the sandblasting gun of this utility model. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0018] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0019] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the objects being described and have no sequential or technical meaning. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages).

[0020] like Figure 1 The sandblasting gun shown mainly includes an air intake assembly 1, a sand inlet assembly 2, and an ejection assembly 3.

[0021] The air intake assembly 1 includes a straight pipe 11, an air pipe connector 13 (formed integrally) at the outer end of the straight pipe 11, a cone 12 at the inner end of the straight pipe 11, and an air passage extending through the air pipe connector 13 and the cone 12 within the straight pipe 11. In this embodiment, the diameter of the cone 12 gradually decreases in the direction away from the air pipe connector 13, and is approximately frustum-shaped. The air passage includes a first air intake 15 at the center of the cone 12 and a second air intake 14 at the center of the straight pipe 11, extending through the air pipe connector 13, so that the first air intake 15 and the second air intake 14 are smoothly connected; since the diameter of the second air intake 14 is larger than the diameter of the first air intake 15, the smooth transition connection is achieved by using a frustum-shaped surface; the ratio of the diameter of the second air intake 14 to the diameter of the first air intake 15 is 1.2 to 2:1, thereby increasing the gas pressure in the first air intake 15.

[0022] The sand inlet assembly 2 includes an outer sleeve 21 that is fitted over the straight pipe 11 and forms a receiving space 20 therewith, and an adapter sleeve 22 that is fitted between one end of the straight pipe 11 and the outer sleeve 21 (the adapter sleeve 22 keeps the straight pipe 11 and one end of the outer sleeve 21 sealed, i.e.) Figure 1 The right end of the casing 21, the sand inlet pipe 23 formed on the outer wall of the outer casing 21, the sand inlet connector 24 formed at the outer end of the sand inlet pipe 23, and the sand inlet channel 25 formed in the sand inlet pipe 23 and the sand inlet connector 24 and connected to the receiving space 20. In this embodiment, the adapter sleeve 22 is connected to the straight pipe 11 and the outer casing 21 by fasteners (such as rivets); specifically, the outer peripheral surface of the straight pipe 11 is provided with a snap-fit ​​groove 111, and the adapter sleeve 22 is connected to the straight pipe 11 by a plurality of fasteners 26 snapped into the snap-fit ​​groove 111; and the adapter sleeve 22 and the outer casing 21 are also connected by a plurality of fasteners embedded therein. In this embodiment, the angle between the centerline of the sand inlet channel 25 and the centerline of the ejection channel 34 is 120~160°, that is, the angle between the centerline of the sand inlet channel 25 and the centerline of the second air inlet channel 14 is 20~60°. This allows the sand to be fully mixed with the air in the containment space before being ejected, thereby improving the uniformity of sandblasting and the surface treatment effect.

[0023] The ejection assembly 3 includes at least a nozzle 31 installed at the other end of the outer casing 21. The nozzle 31 has an ejection channel 34 communicating with the receiving space 20, such that the axis of the ejection channel 34 coincides with the axis of the airflow channel, thereby ejecting the uniformly mixed sand and air mixture at high speed. In this embodiment, the ejection assembly 3 also includes a nozzle retaining ring 32 installed at the other end of the outer casing 21. In this case, the nozzle retaining ring 32 and the adapter sleeve 22 are located at both ends of the outer casing 21, so that one end of the nozzle 31 is installed inside the nozzle retaining ring 32. The connection method between the nozzle retaining ring 32 and the outer casing 21, and the connection method between the nozzle retaining ring 32 and the nozzle 31, can be the same as the connection method between the adapter sleeve 22 and the outer casing 21, so that the outer casing 21 fits over the nozzle retaining ring 32 and maintains a seal between them, and the nozzle retaining ring 32 fits over the nozzle 31 and maintains a seal between them (there are various ways to maintain a seal, such as interference fit, adhesive bonding, etc., which are conventional methods, the same as above).

[0024] In this embodiment, one end of the nozzle 31 is provided with an inwardly recessed frustum-shaped notch 33 corresponding to the cone head 12, so that the frustum-shaped notch 33 is connected to the ejection channel 34, which can guide the aforementioned sand-air mixture and thus greatly reduce the risk of sandblasting gun clogging.

[0025] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A sandblasting gun, characterized in that, include: An air intake assembly (1) includes a straight pipe (11), an air pipe connector (13) formed at the outer end of the straight pipe (11), a cone (12) formed at the inner end of the straight pipe (11), and an air passage opened in the straight pipe (11) and extending through the air pipe connector (13) and the cone (12); The sand inlet assembly (2) includes an outer shell sleeve (21) sleeved outside the straight pipe (11) and forming a receiving space (20) therewith, a transition sleeve (22) sleeved between one end of the straight pipe (11) and the outer shell sleeve (21), a sand inlet pipe (23) formed on the outer wall of the outer shell sleeve (21), a sand inlet connector (24) formed at the outer end of the sand inlet pipe (23), and a sand inlet channel (25) opened inside the sand inlet pipe (23) and the sand inlet connector (24) and connected to the receiving space (20). The ejection assembly (3) includes at least a nozzle (31) installed at the other end of the outer casing (21), and the nozzle (31) has an ejection channel (34) communicating with the receiving space (20), and the axis of the ejection channel (34) coincides with the axis of the air passage.

2. The sandblaster gun of claim 1, wherein: The angle between the centerline of the sand inlet channel (25) and the centerline of the ejection channel (34) is 120~160°.

3. The sandblasting gun according to claim 1 or 2, characterized in that: The diameter of the cone (12) gradually decreases in the direction away from the tracheal connector (13).

4. The sandblasting gun according to claim 1 or 2, characterized in that: The air passage includes a first air inlet (15) located at the center of the cone (12) and a second air inlet (14) located at the center of the straight pipe (11) and extending through the air pipe connector (13). The first air inlet (15) and the second air inlet (14) are smoothly connected, and the diameter of the second air inlet (14) is larger than the diameter of the first air inlet (15).

5. The sandblasting gun according to claim 1 or 2, characterized in that: The outer circumferential surface of the straight tube (11) is provided with a snap-fit ​​groove (111), and the adapter sleeve (22) is connected to the straight tube (11) by a plurality of fasteners (26) that snap into the snap-fit ​​groove (111).

6. The sandblasting gun according to claim 1, characterized in that: The ejection assembly (3) also includes a nozzle retaining ring (32) installed at the other end of the outer casing (21), with one end of the nozzle (31) installed inside the nozzle retaining ring (32).

7. The sandblasting gun according to claim 1 or 6, characterized in that: One end of the nozzle (31) has an inwardly recessed frustum-shaped notch (33) corresponding to the cone (12), and the frustum-shaped notch (33) is connected to the ejection channel (34).

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