Portable sand blasting machine

Abstract

The utility model discloses a portable sand blasting machine which comprises an abrasive tank, a vacuum filter and a first pipeline are fixedly connected in the abrasive tank, a pressure regulating valve and a pressure gauge are arranged outside the first pipeline, a three-way valve is arranged at a port of the first pipeline, an outlet of the three-way valve is fixedly communicated with a second pipeline, and a speed regulating valve is arranged outside the second pipeline. The second pipeline is fixedly communicated with the abrasive tank, the other outlet of the three-way valve is fixedly communicated with a third pipeline, and an outlet of the third pipeline is fixedly communicated with the vacuum filter. Through the structure, one air flow compressed by external equipment is directly injected into the abrasive tank, so that an internal positive pressure environment is formed, and the other part of air is injected from the top through the vacuum filter, so that abrasive caking and spray gun blockage can be prevented, fluidization and two air flows can be assisted to form dynamic balance in the tank, and the service life of the tank is prolonged. And the problems of abrasive blockage and efficiency attenuation of portable equipment are effectively solved while the jet power is ensured.

Description

Technical Field

[0001] This utility model relates to the field of sandblasting machine technology, and in particular to a portable sandblasting machine. Background Technology

[0002] A portable sandblasting machine is a handy, multi-functional tool primarily used to clean or polish object surfaces by blasting abrasive particles. It is widely used in automotive repair, construction, stone processing, and other fields. The working principle of a sandblasting machine is to use compressed air to accelerate and eject abrasive particles, thereby achieving a cleaning or carving effect. For example, a portable sandblasting machine is disclosed in Chinese patent application number CN96224220.9. This device is small, lightweight, easy to use, environmentally friendly, and saves abrasive. However, the unidirectional airflow inside the sandblasting machine cannot form effective turbulent mixing, resulting in uneven distribution of abrasive within the pipe and easy deposition in the low-speed zone. Due to the lack of a reverse airflow flushing function, it cannot promptly remove the abrasive buildup adhering to the pipe wall. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a portable sandblasting machine. A compressed airflow is directly injected into the abrasive canister through an external device, thereby creating an internal positive pressure environment. Another part of the air is injected from the top through a vacuum filter, which can prevent abrasive agglomeration and spray gun clogging, and can also assist in fluidization. The two airflows form a dynamic balance in the canister, which effectively solves the problems of abrasive clogging and efficiency reduction in portable equipment while ensuring the spraying power.

[0004] This utility model also provides a portable sandblasting machine, comprising: an abrasive tank, a vacuum filter and a first pipeline fixedly connected inside the abrasive tank; a pressure regulating valve and a pressure gauge externally mounted on the first pipeline; a three-way valve at the port of the first pipeline; a second pipeline fixedly connected to the outlet of the three-way valve; a speed regulating valve externally mounted on the second pipeline; and the outlet of the second pipeline fixedly connected to the abrasive tank. A third pipeline is fixedly connected to the other outlet of the three-way valve, and the outlet of the third pipeline is fixedly connected to the vacuum filter. A sand outlet pipe is fixedly connected to the outside of the abrasive tank, and a spray gun is fixedly connected to the end of the sand outlet pipe furthest from the abrasive tank. A compressed airflow from an external device is directly injected into the abrasive tank, creating a positive pressure environment inside. Another portion of air is injected from the top through the vacuum filter, preventing abrasive agglomeration and spray gun clogging, and aiding in fluidization. The two airflows form a dynamic balance within the tank, effectively solving the problems of abrasive clogging and efficiency reduction in portable devices while ensuring blasting power.

[0005] According to the portable sandblasting machine of this utility model, a normally closed solenoid valve and a pressure gauge are installed externally on the first pipeline, with the pressure gauge located between the normally closed solenoid valve and the pressure regulating valve. The normally closed solenoid valve automatically closes when power is off, forming a linkage protection with the pressure gauge. The pressure gauge can ensure that the pressure changes inside the first pipeline can be fed back in real time during the adjustment process of the pressure regulating valve.

[0006] According to the portable sandblasting machine of this utility model, the main outlet of the vacuum filter is fixedly connected to the abrasive tank, and the secondary outlet of the vacuum filter is equipped with a normally open solenoid valve. The vacuum filter can remove oil and moisture from the compressed air, preventing the abrasive from becoming damp and clumping. When the machine is stopped, the normally open solenoid valve remains open to accelerate the evacuation of residual pressure from the pipeline and shorten the waiting time before equipment maintenance.

[0007] According to the portable sandblasting machine of this utility model, the abrasive tank has a storage cavity inside, and the top of the abrasive tank has a feed inlet communicating with the storage cavity. Abrasive is fed through the feed inlet so that it can enter the storage cavity for subsequent sandblasting.

[0008] According to the portable sandblasting machine of this utility model, a first semi-ring plate and a second semi-ring plate are rotatably connected to the outside of the feed inlet. A locking rod is rotatably connected to the inside of the first semi-ring plate, and the outside of the locking rod is engaged with the inside of the second semi-ring plate. A cover is engaged with the inside of the first and second semi-ring plates. When it is necessary to open the feed inlet, rotating the locking rod allows the first and second semi-ring plates to be opened, thereby allowing the cover to be removed.

[0009] According to the portable sandblasting machine of this utility model, an observation port is provided on the outside of the abrasive tank, and the interior of the observation port is a double-layered hollow glass structure. The double-layered hollow glass can effectively block the impact of high-speed splashing abrasive, prevent the observation window from breaking and causing personal injury. In addition, the vacuum layer can also reduce the transmission of noise generated during equipment operation and improve the operating environment.

[0010] According to the portable sandblasting machine of this utility model, an air inlet is provided on the side of the abrasive tank away from the observation port, and the air inlet is fixedly connected to the input end of an external device. The air inlet allows air to enter the external device, facilitating subsequent power supply for sandblasting.

[0011] According to the portable sandblasting machine of this utility model, a control lever is provided at the valve core of the normally open solenoid valve. The top of the control lever penetrates the top of the abrasive jar, and the top of the abrasive jar is provided with a movable groove that matches the control lever. The control lever moves through the movable groove, facilitating manual adjustment of the opening and closing state of the normally open solenoid valve.

[0012] Beneficial effects: Compared with existing technologies, this new portable sandblasting machine injects a compressed airflow directly into the abrasive canister through an external device, thereby creating a positive pressure environment inside. Another part of the air is injected from the top through a vacuum filter, which can prevent abrasive agglomeration and spray gun clogging, and can also assist in fluidization. The two airflows form a dynamic balance in the canister, which effectively solves the problems of abrasive clogging and efficiency reduction in portable equipment while ensuring the spraying power. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0014] Figure 1 This is a complete structural diagram of the portable sandblasting machine of this utility model;

[0015] Figure 2 This is a side view of the portable sandblasting machine of this utility model;

[0016] Figure 3 This is a structural diagram of the portable sandblasting machine of this utility model in its open state;

[0017] Figure 4 This is a flow chart of the portable sandblasting machine of this utility model;

[0018] Figure 5 This is a structural diagram of the locking mechanism of the portable sandblasting machine of this utility model.

[0019] Legend:

[0020] 1. Abrasive tank; 3. Vacuum filter; 4. Pressure regulating valve; 5. Pipeline 1; 6. Pressure gauge; 7. Three-way valve; 8. Pipeline 2; 9. Pipeline 3; 10. Sand outlet pipe; 11. Spray gun; 12. Normally closed solenoid valve; 13. Normally open solenoid valve; 14. Storage chamber; 15. Feed inlet; 16. First half-ring plate; 17. Second half-ring plate; 18. Locking rod; 19. Cover; 20. Observation port; 21. Air inlet; 22. Control lever; 23. Movable groove; 24. Speed ​​regulating valve. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-5The portable sandblasting machine of this utility model includes: an abrasive tank 1, a vacuum filter 3 and a first pipeline 5 fixedly connected inside the abrasive tank 1, the main outlet of the vacuum filter 3 fixedly connected to the abrasive tank 1, a normally open solenoid valve 13 provided at the secondary outlet of the vacuum filter 3, an air inlet 21 provided on the side of the abrasive tank 1 away from the observation port 20, the air inlet 21 fixedly connected to the input end of an external device, a pressure regulating valve 4 and a pressure gauge 6 provided outside the first pipeline 5, a three-way valve 7 provided at the port of the first pipeline 5, a second pipeline 8 fixedly connected at the outlet of the three-way valve 7, a speed regulating valve 24 provided outside the second pipeline 8, the outlet of the second pipeline 8 fixedly connected to the abrasive tank 1, a third pipeline 9 fixedly connected at the other outlet of the three-way valve 7, the outlet of the third pipeline 9 fixedly connected to the vacuum filter 3, a sand outlet pipe 10 fixedly connected outside the abrasive tank 1, and a spray gun 11 fixedly connected at the end of the sand outlet pipe 10 away from the abrasive tank 1.

[0023] Specifically, the external equipment is connected to the abrasive tank 1, and air is drawn in through the air inlet 21. After being regulated by the pressure regulating valve 4, the working airflow is formed. The three-way valve 7 divides the airflow into two paths. One path returns to the abrasive tank 1 through the second pipeline 8 to form an internal circulation, and the other path enters the vacuum filter 3 through the third pipeline 9. The dust-laden airflow completes gas-solid separation in the vacuum filter 3, and the clean air returns to the abrasive tank 1 through the main outlet to form a closed-loop recovery. The normally open solenoid valve 13 at the secondary outlet controls the dust emission. In addition, the airflow speed of the second pipeline 8 is adjusted by the speed regulating valve 24, thereby adjusting the fluidization effect in the abrasive tank 1. The pressure gauge 6 monitors the working pressure of the first pipeline 5 in real time and works with the pressure regulating valve 4 to maintain system stability.

[0024] The inlet 15 is externally rotatably connected to a first semi-ring plate 16 and a second semi-ring plate 17. The first semi-ring plate 16 is internally rotatably connected to a locking rod 18. The outside of the locking rod 18 is engaged with the inside of the second semi-ring plate 17. The first semi-ring plate 16 and the second semi-ring plate 17 are internally engaged with a cover 19.

[0025] Specifically, rotating the locking lever 18 releases the locking state of the first semi-ring plate 16 and the second semi-ring plate 17, then opens the first semi-ring plate 16 and the second semi-ring plate 17, and removes the cover 19 from the inside, thereby exposing the feed port 15. Then, sand is injected into the interior of the abrasive tank 1 through the feed port 15, and then the cover 19 is fixed by the first semi-ring plate 16 and the second semi-ring plate 17.

[0026] A normally closed solenoid valve 12 and a pressure gauge 6 are installed on the outside of pipeline 5. The pressure gauge 6 is located between the normally closed solenoid valve 12 and the pressure regulating valve 4. A control lever 22 is installed at the valve core of the normally open solenoid valve 13. The top of the control lever 22 passes through the top of the abrasive tank 1. The top of the abrasive tank 1 is provided with a movable groove 23 that matches the control lever 22. The abrasive tank 1 is provided with a storage chamber 14 inside. The top of the abrasive tank 1 is provided with a feed inlet 15 that communicates with the storage chamber 14. An observation port 20 is provided on the outside of the abrasive tank 1. The interior of the observation port 20 is a double-layer hollow glass structure.

[0027] Specifically, the normally closed solenoid valve 12 serves as an emergency shut-off device in pipeline 5, which can automatically block the airflow when the system is over-pressurized. The normally open solenoid valve 13 can be manually intervened through the control lever 22. The operator can adjust the valve core opening through the movable groove 23 to control the dust emission rate. In addition, the double-layer vacuum structure of the observation port 20 ensures pressure resistance and avoids internal fogging that affects visibility.

[0028] Working principle: First, rotating the locking rod 18 releases the locking of the first semi-ring plate 16 and the second semi-ring plate 17. Then, the cover 19 is removed from the inside, exposing the feed inlet 15. Next, sand is injected into the grinding tank 1 through the feed inlet 15. Then, the cover 19 is fixed by the first semi-ring plate 16 and the second semi-ring plate 17 to close the feed inlet 15. Then, the valve of the external equipment is slowly opened, and the pressure regulating valve 4 is rotated clockwise to adjust the working pressure. Then, the normally open solenoid valve 13 is opened, and the normally closed solenoid valve 14 is closed. Valve 12 is closed, and air is compressed and drawn in through an external device. Part of the air is directly introduced into the abrasive tank 1 to establish the working pressure inside the tank, which serves as the power source for accelerating the abrasive and pushing it through the sand outlet pipe 10 into the spray gun 11, so that the abrasive can be sprayed out of the spray gun 11 at high speed. The other part of the air passes through the vacuum filter 3, which can remove moisture and oil, prevent the abrasive from clumping and the spray gun 11 from clogging, and can also assist in fluidization, so that the abrasive remains in a loose state. The two airflows form a dynamic balance in the tank, which ensures the delivery pressure and avoids abrasive deposition.

[0029] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A portable sandblaster characterized by include: An abrasive tank (1) is provided with a vacuum filter (3) and a first pipeline (5) fixedly connected inside the abrasive tank (1). A pressure regulating valve (4) and a pressure gauge (6) are provided outside the first pipeline (5). A three-way valve (7) is provided at the port of the first pipeline (5). A second pipeline (8) is fixedly connected to the outlet of the three-way valve (7). A speed regulating valve (24) is provided outside the second pipeline (8). The outlet of the second pipeline (8) is fixedly connected to the abrasive tank (1). Another outlet of the three-way valve (7) is fixedly connected to a third pipeline (9). The outlet of the third pipeline (9) is fixedly connected to the vacuum filter (3). A sand outlet pipe (10) is fixedly connected to the outside of the abrasive tank (1). A spray gun (11) is fixedly connected to the end of the sand outlet pipe (10) away from the abrasive tank (1).

2. The portable sandblaster of claim 1, wherein, The first pipeline (5) is externally equipped with a normally closed solenoid valve (12) and a pressure gauge (6), with the pressure gauge (6) located between the normally closed solenoid valve (12) and the pressure regulating valve (4).

3. The portable sandblaster of claim 1, wherein, The main outlet of the vacuum filter (3) is fixedly connected to the abrasive tank (1), and the secondary outlet of the vacuum filter (3) is equipped with a normally open solenoid valve (13).

4. The portable sandblaster of claim 1, wherein, The abrasive jar (1) has a storage cavity (14) inside, and the top of the abrasive jar (1) has a feed inlet (15) that communicates with the storage cavity (14).

5. The portable sandblaster of claim 4, wherein, The feed inlet (15) is rotatably connected to a first semi-ring plate (16) and a second semi-ring plate (17). The first semi-ring plate (16) is rotatably connected to a locking rod (18). The outside of the locking rod (18) is engaged with the inside of the second semi-ring plate (17). The first semi-ring plate (16) and the second semi-ring plate (17) are engaged with a cover (19).

6. The portable blasting machine of claim 1, wherein, An observation port (20) is provided on the outside of the abrasive jar (1), and the inside of the observation port (20) is a double-layer hollow glass structure.

7. The portable sandblaster of claim 1, wherein, An air inlet (21) is provided on the side of the abrasive tank (1) away from the observation port (20), and the air inlet (21) is fixedly connected to the input end of the external device.

8. The portable sandblaster of claim 3, wherein, The normally open solenoid valve (13) has a control lever (22) at its valve core. The top of the control lever (22) penetrates the top of the abrasive jar (1). The top of the abrasive jar (1) has a movable groove (23) that matches the control lever (22).

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