A nozzle for a sandblasting gun

Abstract

The utility model discloses a kind of nozzles for sandblasting gun, it is characterized by, including: nozzle body, through installation cavity is provided in nozzle body interior, the end of installation cavity is connected with the spray bar of sandblasting equipment;Nozzle structure is installed in the installation cavity by mandrel;The front end of the mandrel protrudes the nozzle body and is equipped with sanding head structure;The nozzle structure is sequentially provided with contraction part, throat part and expansion part in the direction of sanding head;The sanding head structure is a conical sanding head structure, arc conical surface is provided on the side of the conical sanding head structure towards the nozzle body;Gas sand mixture is scattered by the cooperation of nozzle structure and sanding head structure and is handled. To replace the nozzle combination in current market, workpiece two end head chamfer surface is fully covered, to meet the requirement such as Sa2.5 grade or more of high surface treatment quality, surface roughness can reach Rz12.5 or more, the need of the enterprise production of high efficiency, less worker workload, high safety requirement, less energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of sandblasting equipment manufacturing, specifically to a nozzle for a sandblasting gun. Background Technology

[0002] The current mainstream nozzle combinations on the market suffer from significant technical bottlenecks: on the one hand, sandblasting efficiency is generally low, specifically manifested in a small amount of sand sprayed per unit time, a slow spraying speed, and poor uniformity of sand flow distribution, leading to unstable surface treatment results; on the other hand, sandblasting quality is difficult to achieve high precision requirements, often resulting in inadequate local treatment or excessive wear. More significantly, existing equipment employs a single-end sequential processing mode—requiring sandblasting of one end of the workpiece's chamfer first, followed by manual disassembly and flipping of the workpiece, and then repeating the operation on the other end. This method has three major drawbacks: firstly, workers must frequently handle heavy objects and adjust positioning, resulting in extremely high labor intensity; secondly, the workpiece turning process poses safety hazards such as mechanical clamping and sand splashing, significantly increasing the risk of accidents; and thirdly, the single-end processing mode leads to insufficient equipment utilization, limited output per unit time, and high energy costs for continuous operation. These pain points severely restrict the improvement of sandblasting equipment's production efficiency and economic benefits, urgently requiring breakthroughs through technological innovation. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the purpose of this utility model is to provide a nozzle for a sandblasting gun.

[0004] A nozzle for a sandblasting gun, comprising:

[0005] A nozzle body, wherein a through mounting cavity is provided inside the nozzle body, and the end of the mounting cavity is connected to the spray bar of a sandblasting device;

[0006] A nozzle structure is mounted in the mounting cavity via a mandrel;

[0007] The front end of the mandrel extends out of the nozzle body and is equipped with a sand-dispersing head structure;

[0008] The nozzle structure is provided with a constriction section, a throat section, and an expansion section in sequence facing the sand dispersing head;

[0009] The sand-dispersing head structure is a conical sand-dispersing head structure, and an arc-shaped conical surface is provided on the side of the conical sand-dispersing head structure facing the nozzle body;

[0010] The air-sand mixture is scattered by combining the nozzle structure with the sand-scattering head structure.

[0011] In a preferred embodiment of this utility model, the mandrel is mounted in the mounting cavity via a mandrel fixing seat;

[0012] The mandrel fixing seat is provided with a guide channel for the air-sand mixture to pass through in the middle;

[0013] The mandrel is provided with a bushing on the outside, and is guided and installed at the position where the mandrel extends out of the nozzle body by a matching seal and a first threaded fastener.

[0014] In a preferred embodiment of this utility model, the sand-spreading head structure is mounted on the mandrel head by a second threaded fastener.

[0015] In a preferred embodiment of this utility model, the sealing element is a sealing gasket.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention can replace the nozzle assembly currently on the market, providing full coverage of the chamfered surfaces at both ends of the workpiece to meet the needs of enterprises with high surface treatment quality requirements, such as Sa2.5 or above, surface roughness reaching Rz12.5 or above, high efficiency, less worker workload, high safety requirements, and low energy consumption. Attached Figure Description

[0018] The structure and working principle of this utility model will be described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, in the following descriptions, well-known structures and technologies have been omitted to avoid unnecessary confusion regarding the concept of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] like Figure 1The nozzle shown is for a sandblasting gun and includes a nozzle body 1. The nozzle body 1 has a through mounting cavity 11 inside. The end of the mounting cavity 11 is connected to the spray bar of the sandblasting equipment (not shown in the figure). The sandblasting equipment can be any existing sandblasting equipment that mixes sand shot with compressed air for output.

[0023] A nozzle structure 4 is installed in the mounting cavity 11 via a mandrel 2. A nozzle body 1 extends out from the front end of the mandrel 2 and a sand-spreading head structure 8 is installed thereon.

[0024] Specifically, the mandrel 2 is installed in the mounting cavity 11 through the mandrel fixing seat 3, and the middle of the mandrel fixing seat 3 is provided with a guide channel 31 for the air-sand mixture to pass through.

[0025] The spindle 2 is provided with a bushing 7 on the outside. The spindle 2 is guided and installed at the position where it extends out of the nozzle body 1 by a matching seal 6 and a first threaded fastener 5.

[0026] In this embodiment of the invention, the sealing element 6 is a sealing gasket. The first threaded fastener 5 is a round nut.

[0027] The sand-spreading head structure 8 is mounted on the head of the mandrel 2 via a second threaded fastener 9.

[0028] In an embodiment of this utility model, the second threaded fastener 9 is a matching bolt and nut.

[0029] The nozzle structure 4 is provided with a constriction section 41, a throat section 42 and an expansion section 43 in sequence in the direction of the sand dispersing head 8.

[0030] The sand-dispersing head structure 8 is a conical sand-dispersing head structure, and an arc-shaped conical surface 81 is provided on the side of the conical sand-dispersing head structure facing the nozzle body 1.

[0031] The air-sand mixture is scattered by the combination of nozzle structure 4 and sand-scattering head structure 8 to form a cone-shaped scattering zone.

[0032] Because of the above structure, the beneficial effects of this utility model are as follows:

[0033] After the nozzle of the sandblasting gun of this utility model is installed at the end of the gun rod, the air-sand mixture with a certain speed enters the nozzle structure 4 after passing through the mandrel 2 and the mandrel fixing seat 3. Under the combined action of the unique structure of the nozzle structure 4 (connected contraction part 41, throat part 42 and expansion part 43) and the bushing 7, the ejected air-sand mixture forms a cone-shaped scattering zone 1 with uniform sand density. Then, under the action of the sand-scattering head structure 8, due to its unique arc-shaped cone surface 81 with specific dimensions, the previous cone-shaped scattering zone 1 undergoes a huge change, forming a cone-shaped scattering zone 2 with a certain speed and special sand density, which can simultaneously complete the sandblasting of the inner wall of the circular workpiece and the 45° chamfer at both ends.

[0034] Sandblasting the chamfered ends of workpieces often results in poor performance at one end due to the unique mechanical structure and the common nozzle combinations used in such applications. This invention solves this problem by delivering an air-sand mixture through a spray gun, creating a special conical scattering zone 2 that fully covers the chamfered surfaces at both ends of the workpiece.

[0035] The above shows and describes the basic principles, main features, and advantages of this utility model.

[0036] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of this utility model as defined by the appended claims and their equivalents.

Claims

1. A nozzle for a sandblasting gun, characterized in that, include: A nozzle body, wherein a through mounting cavity is provided inside the nozzle body, and the end of the mounting cavity is connected to the spray bar of a sandblasting device; A nozzle structure is mounted in the mounting cavity via a mandrel. The front end of the mandrel extends out of the nozzle body and is equipped with a sand-dispersing head structure; The nozzle structure is provided with a constriction section, a throat section, and an expansion section in sequence facing the sand dispersing head; The sand-dispersing head structure is a conical sand-dispersing head structure, and an arc-shaped conical surface is provided on the side of the conical sand-dispersing head structure facing the nozzle body; The air-sand mixture is scattered by combining the nozzle structure with the sand-scattering head structure.

2. The nozzle for a sandblasting gun as described in claim 1, characterized in that, The mandrel is mounted in the mounting cavity via a mandrel fixing seat; The mandrel fixing seat is provided with a guide channel for the air-sand mixture to pass through in the middle; The mandrel is provided with a bushing on the outside, and is guided and installed at the position where the mandrel extends out of the nozzle body by a matching seal and a first threaded fastener.

3. A nozzle for a sandblasting gun as described in claim 1, characterized in that, The loose sand head structure is installed on the head of the mandrel via a second threaded fastener.

4. A nozzle for a sandblasting gun as described in claim 2, characterized in that, The sealing element is a sealing gasket.

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