Spray head and sand blasting device

Abstract

The utility model relates to the technical field of coating equipment, in particular to a spray head and a sand blasting device. The spray head is used on a sand blasting device and comprises a mounting seat, a rotating shaft, a driving part and a spray head part, the mounting seat is used for connecting a moving mechanism of the sand blasting device, the rotating shaft is rotatably connected with the mounting seat in the axis direction, the driving part is arranged on the mounting seat and is in transmission connection with the rotating shaft, and the spray head part is in transmission connection with the rotating shaft and comprises a spray gun. The opening direction of a nozzle of the spray gun is perpendicular to the axis direction. According to the spray head, the concentrated rotating shaft is in transmission connection with the spray head part, the rotating shaft can drive the spray head part to rotate, the working mode that a large workpiece needs to rotate in the sand blasting process is changed, and the problems of large inertia, difficult positioning, complex control and the like caused by the fact that the large workpiece is difficult to rotate due to overlarge self weight are solved; the purpose that uniform sand blasting can be carried out on the inner cavity without rotation of the workpiece in the sand blasting process is achieved.

Description

Technical Field

[0001] This utility model relates to the field of coating equipment technology, specifically to a nozzle and a sandblasting device. Background Technology

[0002] In sandblasting, the internal cavities of large cylinder blocks often face the challenge of not being able to rotate due to their large size and weight. However, rotation is necessary to ensure that the sandblasted surface receives the sand jet evenly. Traditionally, to achieve this, the entire workpiece is rotated. However, due to their significant weight, large cylinder blocks not only experience considerable inertia during rotation but also face severe challenges in positioning and balance control. Consequently, the rotation method suffers from numerous shortcomings in terms of safety, reliability, and processing efficiency in practical applications. Utility Model Content

[0003] The purpose of this invention is to at least solve the problem of how to complete the internal blasting of large workpieces without self-rotation during the sandblasting process. This purpose is achieved through the following technical solution:

[0004] The first aspect of this utility model provides a nozzle for use in a sandblasting device, comprising:

[0005] Mounting base, the mounting base being used to connect the moving mechanism of the sandblasting device;

[0006] A rotating shaft rotatably connected to the mounting base along its axial direction;

[0007] The drive unit is disposed on the mounting base and is connected to the rotating shaft for transmission.

[0008] The spray head is connected to the rotating shaft and includes a spray gun, wherein the opening direction of the spray gun nozzle is perpendicular to the axial direction.

[0009] According to this invention, the nozzle is driven by a centralized rotating shaft, which drives the nozzle to rotate. This changes the traditional method of rotating large workpieces during sandblasting, avoiding problems such as high inertia, difficult positioning, and complex control caused by the large weight of the workpiece making it difficult to rotate. It achieves the goal of uniformly sandblasting the inner cavity without requiring the workpiece to rotate. Specifically, the nozzle includes a spray gun driven by the rotating shaft, with its nozzle opening direction perpendicular to the shaft axis. This ensures that the sprayed sand evenly covers the inner cavity wall, achieving a comprehensive and high-quality sandblasting effect. Simultaneously, the drive unit is connected to the rotating shaft, allowing the nozzle to be controlled independently for rotation and positioning. This significantly improves the nozzle's stability and safety, and reduces the overall system's structural complexity and maintenance difficulty, thus providing an efficient, reliable, and economical solution for sandblasting the inner cavity of large workpieces.

[0010] In addition, the nozzle according to this utility model may also have the following additional technical features:

[0011] In some embodiments of this utility model, the spray head includes a housing, the housing has an internal cavity, the spray gun is located outside the cavity, and the cavity has a sandblasting canister connected to the spray gun.

[0012] In some embodiments of this utility model, a weight sensor is provided at the bottom of the sandblasting tank.

[0013] In some embodiments of this utility model, the mounting base is provided with a pneumatic-electric slip ring mechanism, which includes a pneumatic slip ring and an electric slip ring. The electric slip ring is electrically connected to the weight sensor, and the pneumatic slip ring is provided with a sand inlet that is connected to the sandblasting tank.

[0014] In some embodiments of this utility model, the rotating shaft is provided with a feeding channel along its axial direction, and the feeding channel is respectively connected to the sand inlet and the sandblasting tank.

[0015] In some embodiments of this utility model, the driving unit includes a motor, the output end of the motor is connected to a driving gear, a driven gear is sleeved on the rotating shaft, and the driving gear and the driven gear are connected in a transmission manner.

[0016] In some embodiments of this utility model, the spray gun has at least two nozzles, and the at least two nozzles are spaced apart along the axial direction.

[0017] In some embodiments of this invention, the opening directions of two adjacent nozzles along the axial direction are opposite.

[0018] In some embodiments of this utility model, the spray gun is coaxially arranged with the rotating shaft.

[0019] The second aspect of this utility model provides a sandblasting device comprising a plurality of the aforementioned nozzles. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0021] Figure 1 A schematic diagram of the structure of a nozzle according to an embodiment of the present invention is shown.

[0022] Figure 2 A first-view view of the nozzle according to an embodiment of the present invention is shown schematically;

[0023] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0024] The attached figures are labeled as follows:

[0025] 100. Spray nozzle;

[0026] 10. Mounting base; 20. Rotating shaft; 30. Motor; 40. Spray head; 41. Spray gun; 411. First nozzle; 412. Second nozzle; 42. Sandblasting can; 43. Weight sensor; 44. Housing; 50. Pneumatic-electric slip ring mechanism; 51. Pneumatic slip ring; 511. Sand inlet; 52. Electric slip ring. Detailed Implementation

[0027] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0028] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0029] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0030] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0031] like Figures 1 to 3As shown, according to an embodiment of the present invention, a nozzle 100 is proposed. The nozzle 100 is used on a sandblasting device and includes a mounting base 10, a rotating shaft 20, a drive unit, and a nozzle head 40. The mounting base 10 is used to connect the moving mechanism of the sandblasting device. The rotating shaft 20 is rotatably connected to the mounting base 10 along its axial direction. The drive unit is disposed on the mounting base 10 and is drivenly connected to the rotating shaft 20. The nozzle head 40 is drivenly connected to the rotating shaft 20. The nozzle head 40 includes a spray gun 41, and the opening direction of the nozzle of the spray gun 41 is perpendicular to the axial direction.

[0032] According to this embodiment, the nozzle 100 is connected to the nozzle head 40 via a centralized rotating shaft 20. The rotating shaft 20 can drive the nozzle head 40 to rotate, changing the working method where large workpieces need to rotate during sandblasting. This avoids problems such as large inertia, difficult positioning, and complex control caused by the large weight of large workpieces making rotation difficult. It achieves the goal of uniformly sandblasting the inner cavity without requiring the workpiece to rotate during sandblasting. Specifically, the nozzle 100 includes a spray gun 41 connected to the rotating shaft 20. The nozzle opening direction is perpendicular to the axis of the rotating shaft 20, ensuring that the sprayed sand stream can uniformly cover the inner cavity wall, thereby achieving an all-round, high-quality sandblasting effect. At the same time, the drive unit is connected to the rotating shaft 20, allowing the nozzle 100 to be controlled by an independent drive unit for rotation and positioning. This greatly improves the stability and safety of the nozzle 100 and reduces the structural complexity and maintenance difficulty of the overall system, thus providing an efficient, reliable, and economical solution for sandblasting the inner cavity of large workpieces.

[0033] In some embodiments, the nozzle 40 includes a housing 44, with an internal cavity. A spray gun 41 is located outside the cavity, and a sandblasting canister 42 is located inside the cavity, connected to the spray gun 41. Firstly, by encapsulating the sandblasting canister 42 within the housing 44, not only is the canister effectively protected from external environmental interference and mechanical impact, but the transmission channel of abrasive between the canister 42 and the nozzle 100 is also ensured to be stable and reliable, thus greatly improving the continuity and uniformity of the abrasive flow. Secondly, the placement of the spray gun 41 outside the cavity allows for better control of the spray direction and coverage area of ​​the abrasive flow, enabling precise and comprehensive sandblasting of the inner cavity of large workpieces without workpiece rotation, thereby overcoming the inertia and positioning problems caused by workpiece rotation in traditional processes.

[0034] Furthermore, a weight sensor 43 is installed at the bottom of the sandblasting canister 42. This sensor measures the weight of the canister, allowing for real-time measurement and monitoring of the abrasive material within the canister, thus accurately tracking abrasive consumption. When insufficient abrasive is detected, the system automatically triggers a replenishment mechanism to ensure a stable and continuous abrasive flow, preventing disruptions to the sandblasting quality due to supply interruptions. This not only improves the intelligence and automation of the sandblasting process but also effectively reduces operational risks and maintenance difficulties, providing a more efficient, reliable, and economical solution for sandblasting the internal cavities of large workpieces.

[0035] It is understood that the sandblasting tank 42 is equipped with a sand inlet 511, which is kept closed during normal sandblasting to ensure that the sand inside the tank remains sealed and stable, unaffected by external factors. During sandblasting, the weight sensor 43 at the bottom monitors the weight of the sand inside the tank 42 in real time. If insufficient sand is detected, the system automatically pauses the sandblasting operation to prevent unstable sand flow from adversely affecting processing quality. At this time, the system issues a warning signal, prompting the worker to open the sand inlet 511 to replenish the sand inlet 42. Once the sand reaches the preset weight, the inlet 511 is closed again, and the sandblasting operation resumes. This implementation effectively avoids the problem of intermittent sand flow caused by insufficient sand supply, ensuring the continuity and uniformity of the sand flow during sandblasting. Simultaneously, precise control through manual intervention improves the operational safety of the equipment and the overall processing quality.

[0036] Understandably, the mounting base 10 integrates a pneumatic-electric slip ring mechanism 50, which includes a pneumatic slip ring 51 and an electric slip ring 52. The electric slip ring 52 is electrically connected to the weight sensor 43 to monitor the weight of the sand in the sandblasting tank 42 in real time. Simultaneously, the pneumatic slip ring 51 has a sand inlet 511, which is directly connected to the sandblasting tank 42. The sand inlet 511 is also connected to an external storage tank. When the weight sensor 43 detects insufficient sand in the sandblasting tank 42, the system transmits a signal to the control unit via the electric slip ring 52. The external storage tank then supplies sand to the sand inlet 511 via a feed pump, without interrupting the sandblasting operation and preventing sand flow interruption or instability from affecting the sandblasting quality. This implementation method ensures stable transmission of air and electrical signals during rotation and enables intelligent monitoring and timely replenishment of sand material in the sandblasting tank 42. This guarantees the continuity and uniformity of the sand flow during sandblasting, improves the stability of sandblasting operations and product quality, and enhances the overall safety and automation level of the operation.

[0037] Furthermore, the rotating shaft 20 is provided with a feeding channel along its axial direction. One end of the feeding channel is connected to the sand inlet 511, and the other end is connected to the sandblasting tank 42, realizing direct conveying of sand within the rotating structure. This embodiment allows sand to be continuously and stably conveyed from the sand inlet 511 to the sandblasting tank 42 during the sandblasting process, enabling online replenishment of sand without interrupting the sandblasting operation, thus ensuring the continuity and uniformity of the sand flow. At the same time, the feeding channel is integrated into the rotating shaft 20, avoiding the complexity and reliability issues caused by the rotation of external transmission lines, thereby further improving the overall safety, stability, and automation level of the system.

[0038] Understandably, in the above embodiment, the air slip ring 51 is not only responsible for stably transmitting compressed air during rotation, but also provides the necessary pneumatic power for conveying sand in the feeding channel through its connection with the sand inlet 511. Specifically, compressed air enters the feeding channel inside the rotating shaft 20 through the air slip ring 51, forming an airflow that propels the sand from the sand inlet 511 to the sandblasting tank 42, thereby ensuring that the sand can be continuously replenished during sandblasting without interrupting the operation. This design not only ensures the continuity and uniformity of the sand flow, but also simplifies the equipment structure, reduces the reliability problems that may occur in the external transmission lines during rotation, and significantly improves the stability and automation level of the entire sandblasting system.

[0039] In some embodiments, the drive unit is a motor 30, the output end of which is connected to a driving gear, and a driven gear is fitted on the rotating shaft 20. The driving gear and the driven gear are connected in a transmission manner. In this embodiment, the rotational power of the motor 30 is efficiently and stably transmitted to the rotating shaft 20 and the spray head 40 it drives, ensuring precise speed and positioning control even under high-speed continuous operation. At the same time, the gear transmission structure has the advantages of smooth transmission and uniform torque output, effectively reducing mechanical vibration and noise, and improving the working stability and reliability of the entire system. This embodiment not only simplifies the power transmission path, but also ensures the accuracy and uniformity of sandblasting the internal cavity of large workpieces while meeting the requirements of high-load and high-efficiency sandblasting operations, thereby improving the overall processing quality and the level of equipment automation.

[0040] Specifically, the connection between the driven gear and the shaft 20 can be achieved through interference fit, integral structure, key connection, threaded connection, or fastening bolts. For example, the shaft 20 may have a pre-machined keyway or protrusion, while the inner wall of the driven gear has a matching keyhole. A standard key is inserted to tightly connect the two, ensuring no relative slippage occurs during torque transmission. Additionally, a thrust ring or sealing ring can be used to prevent abrasive and dust from entering the gear transmission components, further improving the system's durability and reliability. This connection method not only enables efficient and stable power transmission between the shaft 20 and the driven gear but also ensures precise fit between the shaft 20 and the gear under high-speed rotation conditions, thereby improving the overall stability of the sandblasting device and the quality of the sandblasting process.

[0041] In some embodiments, the spray gun 41 has at least two nozzles, arranged at intervals along the axial direction. This embodiment allows multiple nozzles to operate simultaneously, producing overlapping and uniform spray patterns, thereby effectively covering a larger area of ​​the inner cavity surface and avoiding localized under-blasting or over-blasting caused by uneven spraying from a single nozzle. Simultaneously, the multi-nozzle configuration also improves the redundancy of blasting; even if one nozzle's spraying effect is affected by abrasive blockage or other reasons, the other nozzles can maintain the continuity and stability of the overall blasting operation. This design not only improves the uniformity and efficiency of the blasting process but also enhances the reliability and adaptability of the equipment, making it particularly suitable for the efficient processing of the inner cavities of large and complex workpieces.

[0042] It is understood that the spray gun 41 has at least two independent sandblasting channels, each directly connected to the sandblasting tank 42 and corresponding to an independent nozzle. This embodiment ensures balanced sand delivery within each sandblasting channel, avoiding the problem of excessive sand flow at the upstream nozzle and insufficient sand flow at the downstream nozzle due to improper channel arrangement. This ensures that each nozzle operates with the same sand flow rate during sandblasting. Balanced sand distribution not only improves the uniformity of the sandblasting effect but also ensures consistent internal cavity treatment quality and reduces the risk of affecting the overall sandblasting operation due to a single nozzle malfunction, further enhancing the system's stability and reliability.

[0043] Furthermore, the opening directions of two adjacent nozzles along the axis of the rotating shaft 20 are opposite, i.e., one nozzle faces one direction and the other faces the opposite direction. This ensures that the abrasive material ejected from each blasting channel forms a symmetrical and balanced spray distribution within the workpiece cavity. This not only counteracts the abrasive flow deviation that may be caused by unilateral spraying but also improves the overall uniformity of coverage during the blasting process. This opposing spraying method not only makes the abrasive output from each nozzle more balanced, avoiding the impact of excessive or insufficient abrasive flow on processing results, but also reduces abrasive flow instability caused by disturbances during the blasting process, thereby further improving the processing quality of the blasting operation and the operational reliability of the equipment.

[0044] In a preferred embodiment, there are two nozzles, namely a first nozzle 411 and a second nozzle 412, and the opening directions of the first nozzle 411 and the second nozzle 412 are opposite.

[0045] Furthermore, the number of nozzles is at least three, and these nozzles are evenly arranged along the circumferential direction of the nozzle 100. This ensures that sand is sprayed simultaneously from multiple directions, creating a uniform and all-around sandblasting coverage effect. The reasonable spacing between the nozzles not only effectively avoids the problem of excessive or insufficient sand flow on one side, but also significantly improves the uniformity and consistency of sandblasting within the cavity, reducing surface defects caused by uneven local sand distribution. In addition, this evenly arranged multi-nozzle design enhances the system's redundancy; even if individual nozzles become clogged or experience spraying abnormalities, it will not significantly affect the overall sandblasting effect, thereby further improving the stability, reliability, and processing quality of the equipment.

[0046] In some embodiments, the spray gun 41 is coaxially arranged with the rotating shaft 20, meaning the spray gun 41 is positioned along the centerline of the rotating shaft 20. This coaxial structure not only ensures a stable and precise geometric relationship between the spray gun 41 and the rotating shaft 20, thus making the movement trajectory of the spray gun 41 more accurate during sandblasting, but also helps to achieve uniform coverage of the sandblasting effect and reduce the problem of uneven sand flow caused by rotational deviation. Furthermore, the coaxial arrangement simplifies the overall structural design, allowing the power transmission, gas supply, and sand conveying systems to work together more centrally and efficiently, thereby improving the operational stability and processing quality of the equipment and providing a reliable technical guarantee for the efficient sandblasting of the inner cavities of large workpieces.

[0047] This embodiment also provides a sandblasting device, which includes a moving mechanism and multiple nozzles 100 mounted on the moving mechanism, enabling simultaneous sandblasting of multiple cavities of a large workpiece. Each nozzle 100 is evenly mounted on the moving mechanism according to the specific layout of the cavities. As the mechanism moves, the nozzles 100 can be precisely positioned within each cavity, achieving omnidirectional and uniform sandblasting. This not only avoids the inertia and positioning difficulties caused by the rotation of large workpieces but also significantly improves work efficiency and shortens the sandblasting cycle. Simultaneously, the coordinated operation of multiple nozzles 100 ensures stable sand flow in each cavity, guaranteeing consistent sandblasting quality and improving the uniformity and reliability of product surface treatment. Furthermore, the application of the moving mechanism enhances the adaptability and automation level of the equipment, simplifies the overall system structure and maintenance, thus providing a reliable technical solution for large-scale, efficient, and stable sandblasting processing.

[0048] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A nozzle for use in a sandblasting device, characterized in that, include: Mounting base (10), the mounting base (10) is used to connect the moving mechanism of the sandblasting device; A rotating shaft (20) is rotatably connected to the mounting base (10) along its axial direction; A drive unit is provided on the mounting base (10) and is connected to the rotating shaft (20) for transmission. The nozzle (40) is connected to the rotating shaft (20) for transmission. The nozzle (40) includes a spray gun (41), and the opening direction of the nozzle of the spray gun (41) is perpendicular to the axial direction.

2. The nozzle according to claim 1, characterized in that, The nozzle (40) includes a housing (44), the housing (44) has an internal cavity, the spray gun (41) is located outside the cavity, the cavity has an internal sandblasting can (42), and the sandblasting can (42) is connected to the spray gun (41).

3. The nozzle according to claim 2, characterized in that, Along the axial direction, a weight sensor (43) is provided at the bottom of the sandblasting tank (42).

4. The nozzle according to claim 3, characterized in that, The mounting base (10) is provided with a pneumatic-electric slip ring mechanism (50), which includes a pneumatic slip ring (51) and an electric slip ring (52). The electric slip ring (52) is electrically connected to the weight sensor (43). The pneumatic slip ring (51) is provided with a sand inlet (511) and the sand inlet (511) is connected to the sandblasting tank (42).

5. The nozzle according to claim 4, characterized in that, The rotating shaft (20) has a feeding channel along its axial direction, and the feeding channel is connected to the sand inlet (511) and the sandblasting tank (42).

6. The nozzle according to claim 1, characterized in that, The drive unit includes a motor (30), the output end of which is connected to a drive gear, and a driven gear is sleeved on the rotating shaft (20). The drive gear and the driven gear are connected in a transmission connection.

7. The nozzle according to claim 1, characterized in that, The spray gun (41) has at least two nozzles, which are spaced apart along the axis.

8. The nozzle according to claim 6, characterized in that, The opening directions of two adjacent nozzles along the axis are opposite.

9. The nozzle according to any one of claims 1 to 8, characterized in that, The spray gun (41) is coaxially arranged with the rotating shaft (20).

10. A sandblasting device, characterized in that, Includes a plurality of nozzles (100) according to any one of claims 1 to 9.

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