A high pressure sandblasting machine

Abstract

The utility model relates to sand blasting machine technical field, concretely relates to a high pressure sand blasting machine. The utility model provides a high pressure sand blasting machine, including sand blasting bin, pressurizing jar, spray gun subassembly, three way joint, pressurizing system, plugging mechanism and exhaust control mechanism, the sand blasting bin includes the main bin body and the sand loading funnel that are connected, sand loading funnel is lower than the main bin body, the bin door is hingedly installed on the main bin body, the bin door is equipped with the observation window and two operating mouth, the pressurizing jar top and bottom are equipped with sand inlet and sand outlet respectively, the pressurizing jar is equipped with the exhaust, the sand inlet of pressurizing jar is linked with sand loading funnel's discharge port. The whole sand blasting process is carried out in the closed sand blasting bin, and the dust produced by sand blasting is limited in the bin, which greatly reduces environmental pollution; the sprayed abrasive returns to the sand loading funnel again, and will not scatter on the ground, significantly improving the recovery rate and utilization rate of abrasive.

Description

Technical Field

[0001] This utility model relates to the field of sandblasting machine technology, specifically to a high-pressure sandblasting machine. Background Technology

[0002] Sandblasting machines are mainly divided into three types: suction sandblasting machines, pressure sandblasting machines, and liquid sandblasting machines. Pressure sandblasting machines use compressed air as power. The working pressure established by the compressed air in the pressure tank forces the abrasive through the sand outlet valve into the sand delivery pipe, and then ejects it through a nozzle or spray gun onto the surface to be processed, achieving the desired processing purpose. For example, the high-pressure sandblasting machine with uniform abrasive mixing disclosed in authorization announcement number CN219212805U injects compressed air into the material tank. Under strong pressure, the abrasive entering the material delivery pipe is transported to the inside of the sand pipe and ejected through the spray gun.

[0003] However, the aforementioned high-pressure sandblasting machine has the following problems: First, the sandblasting environment is open-air, and the blasted abrasive falls directly onto the ground, making it difficult to recover. Furthermore, sandblasting generates dust, which pollutes the environment. Second, the top of the hopper has a door for adding abrasive, resulting in poor airtightness of the hopper. Summary of the Invention

[0004] (I) The problem to be solved by this utility model is that the above-mentioned high-pressure sandblasting machine has the following problems: First, the sandblasting environment is an open-air environment, and the sprayed abrasive falls directly to the ground, making it difficult to recycle. Moreover, dust is generated during sandblasting, which pollutes the environment. Second, the top of the material box is equipped with a door for loading abrasive into the material box, resulting in poor airtightness of the material box.

[0005] (II) Technical Solution A high-pressure sandblasting machine includes a sandblasting chamber, a pressurizing tank, a spray gun assembly, a three-way connector, a pressurizing system, a sealing mechanism, and an exhaust control mechanism; The sandblasting chamber includes a main chamber body and a sand-filling funnel connected to each other. The sand-filling funnel is lower than the main chamber body. A chamber door is hinged to the main chamber body. The chamber door is provided with an observation window and two operating ports. The pressure tank is provided with a sand inlet and a sand outlet at the top and bottom, respectively. The pressure tank is provided with an exhaust port. The sand inlet of the pressure tank is connected to the discharge port of the sand funnel. The sand outlet of the pressure tank is connected to an outlet pipe. A pipe joint is connected to the end of the outlet pipe away from the pressure tank. A valve body is installed on the outlet pipe. The pressurization system is connected to the first end of the tee connector, and the second end of the tee connector is connected to the first end of the pipe connector through a pipe; the sealing mechanism is installed inside the pressurization tank, and the third end of the tee connector is connected to the sealing mechanism through a pressure pipe; The spray gun assembly includes a sandblasting pipe and a spray gun connected together, and the end of the sandblasting pipe away from the spray gun is connected to the second end of the pipe joint; The pressurization system injects compressed gas into the pressurization tank and the sealing mechanism through the three-way connector; when compressed gas is injected into the sealing mechanism, the sealing mechanism actuates to seal the sand inlet. The exhaust control mechanism is sealed and installed on the exhaust port of the pressurized tank to control the opening and closing of the exhaust port.

[0006] According to one embodiment of the present invention, the pressurization system includes an air compressor, an air inlet connector, an air supply pipe, and a first air inlet hose. One end of the first air inlet hose is connected to the first end of the tee connector, and the second end of the first air inlet hose is connected to one end of the air supply pipe. The air inlet connector and the air supply pipe are connected by a connecting pipe, and the air compressor is connected to the air inlet connector through a pipeline.

[0007] According to one embodiment of the present invention, a support frame is included, the sandblasting chamber is mounted on the support frame, an operation panel is provided on the support frame, the back of the operation panel faces the pressurizing tank, and the air supply pipe is installed on the back of the operation panel; the pressurizing system includes a solenoid valve and a pressure regulating valve, the solenoid valve and the pressure regulating valve are sequentially installed on the air supply pipe.

[0008] According to one embodiment of the present invention, the pressurization system includes a pressure detection mechanism, which includes a first pressure gauge mounted on the operation panel. The first pressure gauge is connected to the air supply pipe through a first pressure measuring tube.

[0009] According to one embodiment of the present utility model, the sealing mechanism includes a vertical cylinder, a sealing head and a rubber sleeve. The bottom end of the vertical cylinder is sealed and its top end has an opening. An air inlet is provided on the side wall of the vertical cylinder. One end of the pressure pipe is sealed to the air inlet. The vertical cylinder is lower than the sand inlet of the pressure tank and is coaxially arranged with the sand inlet. The vertical cylinder has a limiting groove on its outer circumferential surface near its top surface. The sealing head is sleeved on the limiting groove. The inner wall of the sealing head is provided with a limiting block. The limiting groove and the limiting block cooperate to limit the movement distance of the sealing head along the axis of the vertical cylinder. The rubber sleeve is sleeved on the sealing head.

[0010] According to one embodiment of the present invention, the exhaust port of the pressurized tank is connected to an exhaust pipe. The exhaust control mechanism includes a pipe seat, a cylinder, a pressure relief pipe, and a plug. The pipe seat has a first opening, an inner cavity, and a second opening that are connected in a continuous manner. The first opening of the pipe seat is fixedly connected to the exhaust pipe. The cylinder is sealed and installed at the second opening of the pipe seat. A circular hole is provided on the side wall of the pipe seat. One end of the pressure relief pipe is sealed and installed in the circular hole on the side wall of the pipe seat. The plug is located at the output end of the cylinder. The cylinder is used to push the plug to move along the axial direction of the pipe seat to block or open the first opening of the pipe seat.

[0011] According to one embodiment of the present invention, a pressure detection mechanism is included, the pressure detection mechanism including a second pressure gauge and a second pressure measuring tube. A pipe connector is installed on the top surface of the pressurizing tank. One end of the second pressure measuring tube is connected to the pipe connector, and the other end is connected to the second pressure gauge. The second pressure gauge is installed on the operating panel.

[0012] According to one embodiment of the present invention, at least one horizontally arranged support net is installed inside the main compartment, and at least one interception net is installed inside the sand-filling funnel.

[0013] According to one embodiment of the present invention, a dust removal assembly is included, the dust removal assembly including a dust collector, and at least one exhaust window is provided in the main compartment, with a dust collector installed at each exhaust window.

[0014] According to one embodiment of the present invention, at least one lighting lamp is installed on the inner top wall of the main compartment.

[0015] The beneficial effects of this utility model are: Compared with traditional pressure-type dry sandblasting machines, this high-pressure sandblasting machine has at least the following advantages: First, the entire sandblasting process is carried out in a closed sandblasting chamber, which confines the dust generated during sandblasting within the chamber, greatly reducing environmental pollution and protecting the health of workers.

[0016] Secondly, the sprayed abrasive returns to the sand-filling funnel and does not scatter on the ground. The abrasive can be recycled back to the pressurization tank through the sand-filling funnel, which significantly improves the recovery and utilization rate of the abrasive.

[0017] Third, the observation window and operating port on the door allow workers to operate the spray gun and place workpieces in a closed environment, taking into account both sealing and operability.

[0018] Fourth, when the pressurization system is started, the compressed gas drives the sealing mechanism through the pressure pipe to actively and reliably seal the sand inlet at the top of the pressurization tank. At the same time, the dedicated exhaust control mechanism can reliably seal the exhaust port of the pressurization tank, thus ensuring that the pressurization tank can establish and maintain a stable high pressure during the sandblasting process, and the airtightness of the pressurization tank is better.

[0019] Fifth, the exhaust control mechanism is not only used for sealing, but can also be opened when material needs to be replenished, so that the high-pressure gas in the pressure tank can be safely and directionally discharged through the pressure relief pipe, quickly balancing the pressure inside and outside the tank, and facilitating the flow of abrasive. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A first-view diagram provided for an embodiment of this utility model; Figure 2 A front view provided for an embodiment of this utility model; Figure 3 A second perspective view provided for an embodiment of this utility model; Figure 4 A cross-sectional view provided for an embodiment of this utility model; Figure 5 A schematic diagram of the pressure tank and control panel provided in an embodiment of this utility model; Figure 6 Provided for the embodiments of this utility model Figure 5 A sectional view; Figure 7 A structural diagram of the pressurization tank provided in an embodiment of this utility model; Figure 8 Provided for the embodiments of this utility model Figure 6 Enlarged view of section A; Figure 9 Provided for the embodiments of this utility model Figure 6 Enlarged view of section B.

[0022] Icons: 1. Support frame; 2. Sandblasting chamber; 201. Chamber door; 202. Observation window; 203. Operating port; 204. Auxiliary door opening mechanism; 3. Sand filling funnel; 4. Pressure tank; 401. Sand inlet pipe head; 402. Exhaust pipe; 5. Control panel; 501. Pressure regulating knob; 502. First pressure gauge; 503. Second pressure gauge; 6. First air inlet hose; 7. T-connector; 8. Second air inlet hose; 9. Sandblasting pipe; 10. Pipe connector; 11. Outlet pipe; 12. Valve body; 13. Pressure regulating valve; 14. Solenoid valve; 15. Air inlet connector; 16. 17. First pressure measuring pipe; 18. Connecting pipe; 19. Exhaust control mechanism; 10. Pipe seat; 10. Inner sleeve; 11. Cylinder; 12. Plug; 13. Flange; 14. Pressure relief pipe; 15. Second pressure measuring pipe; 20. Sealing mechanism; 21. Vertical cylinder; 22. Sleeve; 23. Rubber sleeve; 24. Sealing head; 25. Lighting lamp; 26. Dust collector; 27. Bearing net; 28. Interception net; 29. ​​Control box; 20. Locking fastener; 20. Foot stool; 21. Foot switch; 22. Air supply pipe; 30. Pressure pipe. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figures 1-9 As shown, one embodiment of the present invention provides a high-pressure sandblasting machine, including a sandblasting chamber 2, a pressurizing tank 4, a spray gun assembly, a three-way connector 7, a pressurizing system, a sealing mechanism 20, and an exhaust control mechanism 18; The sandblasting chamber 2 includes a main chamber body and a sand filling funnel 3 connected to each other. The sand filling funnel 3 is lower than the main chamber body. A chamber door 201 is hinged on the main chamber body. The chamber door 201 is provided with an observation window 202 and two operation ports 203. The pressure tank 4 is provided with a sand inlet and a sand outlet at the top and bottom respectively. The pressure tank 4 is provided with an exhaust port. The sand inlet of the pressure tank 4 is connected to the discharge port of the sand funnel 3. The sand outlet of the pressure tank 4 is connected to an outlet pipe 11. The end of the outlet pipe 11 away from the pressure tank 4 is connected to a pipe joint 10. A valve body 12 is installed on the outlet pipe 11. The pressurization system is connected to the first end of the tee connector 7, and the second end of the tee connector 7 is connected to the first end of the pipe connector 10 through a pipe; the sealing mechanism 20 is installed inside the pressurization tank 4, and the third end of the tee connector 7 is connected to the sealing mechanism 20 through a pressure pipe 30. The spray gun assembly includes a sandblasting pipe 9 and a spray gun connected together, with the end of the sandblasting pipe 9 away from the spray gun connected to the second end of the pipe connector 10. The pressurization system injects compressed gas into the pressurization tank 4 and the sealing mechanism 20 through the tee connector 7; when compressed gas is injected into the sealing mechanism 20, the sealing mechanism 20 is activated to seal the sand inlet. The exhaust control mechanism 18 is sealed and installed on the exhaust port of the pressure tank 4 to control the opening and closing of the exhaust port.

[0025] In this embodiment, when using this high-pressure sandblasting machine to treat the surface of a workpiece, the chamber door 201 is first opened to put the abrasive into the main chamber. The abrasive then falls into the sand-filling funnel 3. The abrasive in the sand-filling funnel 3 flows into the pressure tank 4 from the discharge port at the bottom of the sand-filling funnel 3. After the loading is completed, the chamber door 201 is closed. Then, the worker inserts the workpiece into the main chamber through the operating port 203 on the chamber door 201. At the same time, the worker holds the spray gun assembly in the main chamber and aims it at the workpiece. Then, the pressurization system is started. The pressurization system injects compressed gas into the pressure tank 4 and the sealing mechanism 20 through the three-way connector 7. At the same time, the exhaust control mechanism 18 is controlled to seal the exhaust port of the pressure tank 4. Under the action of the compressed gas, the sealing mechanism 20 seals the sand inlet at the top of the pressure tank 4. Since the exhaust port and sand inlet of the pressure tank 4 are blocked, the internal pressure of the pressure tank 4 gradually increases. After the internal pressure of the pressure tank 4 reaches the set range, the valve on the spray gun assembly opens. At this time, under the strong pressure of the pressure tank 4 and the action of the compressed gas in the pressurization system, the abrasive in the pressure tank 4 is sprayed out at high speed through the sandblasting pipe 9 and the spray gun.

[0026] It should be noted that during the sandblasting process of the pressurized tank 4, the sealing mechanism 20 always seals the sand inlet at the top of the pressurized tank 4, and the exhaust control mechanism 18 always seals the exhaust outlet of the pressurized tank 4.

[0027] When it is necessary to replenish the abrasive into the pressure tank 4, the pressurization mechanism must be shut down, the valve body 12 must be closed, and the exhaust control mechanism 18 must be opened to open the exhaust port of the pressure tank 4. Since the pressurization mechanism no longer supplies compressed gas to the sealing mechanism 20, the sealing mechanism 20 will no longer block the sand inlet at the top of the pressure tank 4. At this time, the air pressure inside and outside the pressure tank 4 is the same, and the abrasive in the sand funnel 3 can flow smoothly into the pressure tank 4.

[0028] In this embodiment, as Figure 1 and Figure 2 As shown, the high-pressure sandblasting machine includes a support frame 1, the main body of the sandblasting chamber 2 is fixedly installed on the top support platform of the support frame 1, the bottom outlet of the sand filling funnel 3 is lower than the top surface of the support frame 1, the pressure tank 4 is located in the internal space enclosed by the support frame 1, and an operation panel 5 is installed on the front of the support frame 1, with the back of the operation panel 5 facing the pressure tank 4.

[0029] In this embodiment, as Figure 3 as well as Figure 5 As shown, the pressurization system includes an air compressor (not shown in the figure), an air inlet connector 15, an air supply pipe 29, a solenoid valve 14, a pressure regulating valve 13, and a first air inlet hose 6.

[0030] The air supply pipe 29 is sealed at both ends, and a quick connector is installed on the outer circumference of each end of the air supply pipe 29. Solenoid valve 14 and pressure regulating valve 13 are sequentially installed on the air supply pipe 29, and both solenoid valve 14 and pressure regulating valve 13 are installed on the back of the control panel 5. The pressure regulating knob 501 of the pressure regulating valve 13 passes through the back of the control panel 5, meaning that the pressure regulating knob 501 can be rotated from the front of the control panel 5.

[0031] One end of the first intake hose 6 is connected to the first end of the tee connector 7, and the second end of the first intake hose 6 is connected to the quick connector at the first end of the air supply pipe 29. The intake connector 15 and the quick connector at the second end of the air supply pipe 29 are connected by a connecting pipe 17, and the air compressor is connected to the intake connector 15 through a pipeline.

[0032] Thus, the air compressor injects compressed air into the inlet connector 15 through the pipeline. Then, the compressed air enters the second end of the supply pipe 29 through the connecting pipe 17. After passing through the pressure regulating valve 13 and the solenoid valve 14 in sequence, the compressed air enters the first intake hose 6 from the quick connector at the first end of the supply pipe 29. It then enters the tee connector 7 from the first end opening. At this time, a portion of the compressed air enters the pressure pipe 30 from the third end of the tee connector 7 and then enters the sealing mechanism 20. Under the action of the compressed gas, the sealing mechanism 20 seals the sand inlet at the top of the pressurizing tank 4. Another portion of the compressed gas in the tee connector 7 is discharged from the second end of the tee connector 7 and enters the pipe connector 10. Finally, it enters the pressurizing tank 4 through the outlet pipe 11.

[0033] In addition, the solenoid valve 14 can control the opening and closing of the gas supply channel, while the pressure regulating valve 13 can adjust the pressure value of the compressed gas in the gas supply pipe 29 to ensure that the downstream pressure is constant and play a role in pressure limiting protection.

[0034] In some embodiments, in order to detect the compressed air pressure in the air supply pipe 29 in real time, such as Figure 5 As shown, the pressurization system includes a pressure detection mechanism, which includes a first pressure gauge 502 and a first pressure measuring tube 16 installed on the operation panel 5. The first pressure gauge 502 is connected to the air supply pipe 29 through the first pressure measuring tube 16.

[0035] In some embodiments, in order to detect the pressure inside the pressure tank 4 in real time, a pressure detection mechanism is provided. The pressure detection mechanism includes a second pressure gauge 503 and a second pressure measuring tube 19. A through hole is opened on the outer wall of the pressure tank 4 near its top, and a pipe connector is sealed and installed at the through hole. The second pressure gauge 503 is installed on the operation plate 5. One end of the second pressure measuring tube 19 is connected to the pipe connector, and the other end is connected to the second pressure gauge 503.

[0036] like Figure 1 and Figure 2 As shown, the operator can see the pressure regulating knob 501, the first pressure gauge 502, and the second pressure gauge 503 from the front of the control panel 5.

[0037] In this embodiment, as Figure 4 as well as Figure 6 As shown, the top of the pressure tank 4 is provided with a sand inlet pipe head 401, and the internal channel of the sand inlet pipe head 401 forms the sand inlet of the pressure tank 4. The bottom outlet of the sand funnel 3 is provided with a sand outlet pipe head 301, and the sand inlet pipe head 401 and the sand outlet pipe head 301 are connected by a flange seal.

[0038] In this embodiment, as Figure 6 and Figure 8 As shown, the sealing mechanism 20 includes a vertical cylinder 2001, a sleeve 2002, a sealing head 2004, and a rubber sleeve 2003. The bottom end of the vertical cylinder 2001 is sealed, and its top end has an opening. An air inlet is provided on the side wall of the vertical cylinder 2001. The end of the pressure pipe 30 away from the tee connector 7 is sealed to the air inlet on the side wall of the vertical cylinder 2001. The top end of the vertical cylinder 2001 is close to the sand inlet of the pressure tank 4 and is coaxially arranged with the sand inlet. The sleeve 2002 is fixedly fitted on the outer circumferential surface of the vertical cylinder 2001 near its top. A limiting groove is provided on the outer circumferential surface of the sleeve 2002. The limiting groove is annular. The sealing head 2004 is fitted on the limiting groove of the sleeve 2002, and a limiting block is provided on the inner wall of the sealing head 2004. However, since the limiting block is blocked by the limiting groove, the sealing head 2004 can only slide up and down within the limiting groove. The rubber sleeve 2003 is fitted onto the sealing head 2004. It should be noted that the inner top wall of the limiting groove is lower than the top surface of the sleeve 2002, so that the outer circumferential surface of the topmost part of the sleeve 2002 fits against the inner wall of the sealing head 2004, thereby minimizing the leakage of compressed air from the vertical cylinder 2001 through the gap between the sleeve 2002 and the sealing head 2004, and ensuring the sealing between the sleeve 2002 and the sealing head 2004.

[0039] Optionally, to further improve the sealing between the sleeve 2002 and the plug head 2004, an O-ring can be installed on the inner wall of the plug head 2004 near its bottom surface. The O-ring is pressed between the inner wall of the plug head 2004 and the limiting groove.

[0040] Thus, when compressed air enters the pressure pipe 30 from the third end of the three-way connector 7 and then enters the vertical cylinder 2001, the compressed gas in the vertical cylinder 2001 flows upward and pushes the sealing head 2004 upward. The sealing head 2004 drives the rubber sleeve 2003 to move together towards the sand inlet at the top of the pressure tank 4. When the air pressure in the vertical cylinder 2001 reaches a certain level, the sealing head 2004 and the rubber sleeve 2003 tightly press against the sand inlet at the top of the pressure tank 4, thereby sealing the sand inlet at the top of the pressure tank 4.

[0041] It should be noted that the rubber sleeve 2003 is made of rubber and has good deformation ability. Therefore, when the rubber sleeve 2003 is tightly pressed against the sand inlet at the top of the pressure tank 4, the rubber sleeve 2003 adapts to the sand inlet at the top of the pressure tank 4, thereby better sealing the sand inlet at the top of the pressure tank 4.

[0042] In this embodiment, as Figure 6 , Figure 7 and Figure 9 As shown, the exhaust port of the pressure tank 4 is connected to an exhaust pipe 402. The exhaust control mechanism 18 includes a pipe seat 181, an inner sleeve 182, a pressure relief pipe 186, a cylinder 183, a plug 184, and a flange 185. The pipe seat 181 has a first opening, an inner cavity, and a second opening that are connected. The diameter of the first opening of the pipe seat 181 is smaller than the diameter of the inner cavity of the pipe seat 181, and the connection between the first opening of the pipe seat 181 and the inner cavity of the pipe seat 181 is an arc-shaped transition. The inner sleeve 182 is provided on the inner wall of the pipe seat 181, and the external structure of the inner sleeve 182 is adapted to the pipe seat 181.

[0043] Furthermore, a first circular hole and a second circular hole are respectively provided on the tube seat 181 and the inner sleeve 182, and the first circular hole and the second circular hole are connected. Figure 7 As shown, one end of the pressure relief pipe 186 is sealed and installed in the first circular hole on the side wall of the pipe seat 181, so that the pressure relief pipe 186 is connected to the internal space of the inner sleeve 182.

[0044] Furthermore, the first opening of the pipe seat 181 is fitted onto the outer circumferential surface of the exhaust pipe 402, and the first opening of the pipe seat 181 is welded and fixed to the exhaust pipe 402. The cylinder 183 is sealed and installed at the second opening of the pipe seat 181 through the flange 185. The plug 184 is located at the output end of the cylinder 183 and inside the inner sleeve 182, and the shape of the plug 184 is adapted to the opening of the inner sleeve 182 facing the exhaust pipe 402.

[0045] Thus, when it is necessary to block the exhaust pipe 402, the control cylinder 183 pushes the plug 184 to move along the axis of the pipe seat 181 toward the exhaust pipe 402 until the plug 184 blocks the opening of the inner sleeve 182 toward the exhaust pipe 402, which is equivalent to blocking the exhaust pipe 402. At this time, the compressed gas in the pressure tank 4 cannot be discharged through the exhaust pipe 402. It should be noted that at this time, the second round hole of the inner sleeve 182 is tightly fitted with the outer circumferential surface of the plug 184, and the plug 184 blocks the second round hole of the inner sleeve 182, which also blocks the pressure relief pipe 186.

[0046] When the pressure tank 4 needs to be depressurized, the controllable cylinder 183 pushes the plug 184 to move away from the exhaust pipe 402 along the axis of the pipe seat 181, so that the plug 184 disengages from the opening of the inner sleeve 182 facing the exhaust pipe 402. When the plug 184 retracts to the designated position, the second round hole of the plug 184 and the inner sleeve 182 are offset. In this way, the gas inside the pressure tank 4 enters the inner sleeve 182 through the exhaust pipe 402, and then enters the first round hole on the side wall of the pipe seat 181 through the second round hole on the side wall of the inner sleeve 182, and finally enters the pressure relief pipe 186 for discharge.

[0047] In this embodiment, as Figure 5 As shown, the second end opening of the tee connector 7 is connected to one end of the pipe connector 10 via the second air intake hose 8.

[0048] In this embodiment, after the filling of the pressure tank 4 is completed, when the workpiece needs to be processed, the valve body 12 on the outlet pipe 11 is opened first. Then, the cylinder 183 is controlled to push the plug 184 to move along the axis of the pipe seat 181 toward the exhaust pipe 402 until the plug 184 blocks the opening of the inner sleeve 182 toward the exhaust pipe 402. Then, the air compressor is started, and the air compressor injects compressed air into the air inlet connector 15 through the pipeline. The compressed air enters the second end of the air supply pipe 29 through the connecting pipe 17. Then, the compressed air passes through the pressure regulating valve 13 and the solenoid valve 14 in sequence and enters the first air inlet hose 6 from the quick connector at the first end of the air supply pipe 29, thereby entering the tee connector 7 from the first end opening. At this time, a portion of compressed air enters the pressure pipe 30 from the third end of the tee connector 7, thus entering the vertical cylinder 2001. The compressed gas in the vertical cylinder 2001 flows upward and pushes the sealing head 2004 upward. The sealing head 2004 drives the rubber sleeve 2003 to move together towards the sand inlet at the top of the pressure tank 4. When the air pressure in the vertical cylinder 2001 reaches a certain level, the sealing head 2004 and the rubber sleeve 2003 tightly press against the sand inlet at the top of the pressure tank 4, thus sealing the sand inlet at the top of the pressure tank 4. Another portion of compressed gas in the tee connector 7 is discharged from the second end of the tee connector 7 to the second air inlet hose 8, and then enters the pressure tank 4 after passing through the pipe connector 10 and the outlet pipe 11. As more and more gas enters the pressure tank 4, the internal pressure of the pressure tank 4 gradually increases. When the pressure value measured by the second pressure gauge 503 reaches the set value, it indicates that the internal pressure of the pressure tank 4 is large enough and the sandblasting operation can begin. At this time, the operator can pull the trigger of the spray gun. Under strong pressure, the sand particles in the pressurized tank 4 are sprayed out and enter the pipe joint 10. Then, under the combined action of the compressed gas in the second air inlet hose 8, the sand particles are ejected at high speed from the sandblasting pipe 9 and the spray gun.

[0049] It should be noted that when compressed air is injected into the pressurizing tank 4, some air will enter the sandblasting pipe 9 from the pipe joint 10. However, since the valve structure of the spray gun is closed at this time, the gas in the sandblasting pipe 9 will not leak out, and naturally, it will not cause a significant change in the reading of the first pressure gauge 502.

[0050] In addition, it should be noted that when the pressure value measured by the second pressure gauge 503 reaches the set value, the internal pressure of the pressurizing tank 4 is significantly greater than the pressure of the compressed gas in the second air inlet hose 8. Therefore, under the action of pressure difference, the sand particles in the pressurizing tank 4 will enter the pipe joint 10. Moreover, since there is also a large pressure in the second air inlet hose 8, the sand particles are difficult to enter the second air inlet hose 8. At this time, under the strong pressure in the pressurizing tank 4 and the combined action of the compressed gas in the second air inlet hose 8, the sand particles in the pipe joint 10 are forced into the sandblasting pipe 9 and finally sprayed out through the spray gun.

[0051] In this embodiment, Figure 2 As shown, a control box 25 is installed on the side wall of the main body, and the aforementioned solenoid valve 14 and cylinder 183 are respectively connected to the control box 25 via signal.

[0052] In this embodiment, as Figure 1 As shown, a footstool 27 is provided in front of the support frame 1, and a foot switch 28 is placed on the footstool 27. The foot switch 28 is connected to the valve body structure of the spray gun and controls the opening and closing of the valve body structure of the spray gun through the foot switch 28.

[0053] In some embodiments, such as Figure 4 As shown, a support net 23 is installed on the inner wall of the main chamber near the sand hopper 3. The support net 23 has two functions: first, to support the workpiece; second, to filter sand particles.

[0054] In some embodiments, an intercepting net 24 is installed on the inner wall of the sand funnel 3. The intercepting net 24 serves to prevent metal parts such as screws from entering the pressure tank 4 below.

[0055] In some embodiments, such as Figure 1 and Figure 4 As shown, an exhaust window is opened on the inner wall of each of the left and right sides of the main chamber, and a dust collector 22 is installed on the outer wall of each of the left and right sides of the main chamber. The dust collector 22 is connected to the corresponding exhaust window. The dust collector 22 is used to remove dust from the sandblasting chamber 2.

[0056] In some embodiments, a long rectangular hole is formed in the inner top wall of the main chamber, and a lampshade is installed on the top surface of the main chamber, covering the rectangular hole at the top of the main chamber. Multiple lighting lamps 21 are arranged and installed inside the lampshade. The lighting lamps 21 provide light for the workers, facilitating the sandblasting work.

[0057] In some embodiments, such as Figure 1 As shown, the top of the cargo door 201 is hinged to the main cargo body. Two auxiliary door opening mechanisms 204 are installed on the outer walls of the left and right sides of the main cargo body, respectively hinged to the left and right sides of the cargo door 201. The auxiliary door opening mechanisms 204 are pneumatic linkage mechanisms used to open or close the cargo door 201. It should be noted that pneumatic linkage mechanisms for controlling the opening or closing of doors or windows are well-established existing technologies. This application does not impose specific limitations on the specific type of the auxiliary door opening mechanism 204, as long as it can achieve the opening or closing of the cargo door 201.

[0058] In some embodiments, such as Figure 1As shown, two locking fasteners 26 are installed on the front of the main body below the door 201, and two hooks are installed on the front of the door 201 below the operating port 203. The locking fasteners 26 and the hooks cooperate to fix the door 201.

[0059] Compared with traditional pressure-type dry sandblasting machines, the high-pressure sandblasting machine provided in this embodiment has at least the following advantages: First, the entire sandblasting process is carried out in a closed sandblasting chamber 2, and the dust generated by sandblasting is confined inside the chamber. With the help of the dust collector 22 installed on the main chamber, the dust can be effectively collected, greatly reducing environmental pollution and protecting the health of workers.

[0060] Secondly, the sprayed abrasive returns to the sand-filling funnel 3 and does not scatter on the ground. The abrasive can be recycled back to the pressure tank 4 through the sand-filling funnel 3, which significantly improves the recovery rate and utilization rate of the abrasive.

[0061] Third, the observation window 202 and operation port 203 on the door 201 allow workers to operate the spray gun and place workpieces in a closed environment, taking into account both sealing and operability.

[0062] Fourth, when the pressurization system is started, the compressed gas drives the sealing mechanism 20 through the pressure pipe 30 to actively and reliably seal the sand inlet at the top of the pressurization tank 4. At the same time, the dedicated exhaust control mechanism 18 can reliably seal the exhaust port of the pressurization tank 4, thus ensuring that the pressurization tank 4 can establish and maintain a stable high pressure during the sandblasting process, and the airtightness of the pressurization tank 4 is better.

[0063] Fifth, a second pressure gauge 503 and a second pressure measuring tube 19 are installed to directly monitor the pressure inside the pressurization tank 4. The operator can observe this in real time from the front of the control panel 5 to ensure that the pressure is within a safe and effective range before starting sandblasting.

[0064] Sixth, a first pressure gauge 502 and a first pressure measuring tube 16 are installed to monitor the pressure of the gas supply pipe 29, and a pressure regulating valve 13 is equipped to regulate the pressure and limit the pressure to ensure the stability of the downstream gas pressure.

[0065] Seventh, the exhaust control mechanism 18 is not only used for sealing, but can also be controlled to open when material needs to be replenished, so that the high-pressure gas in the pressure tank 4 can be safely and directionally discharged through the pressure relief pipe 186, quickly balancing the pressure inside and outside the tank, and facilitating the flow of abrasive.

[0066] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-pressure sandblasting machine, characterized in that, It includes a sandblasting chamber (2), a pressurizing tank (4), a spray gun assembly, a three-way connector (7), a pressurizing system, a sealing mechanism (20), and an exhaust control mechanism (18); The sandblasting chamber (2) includes a main chamber body and a sand-filling funnel (3) connected to each other. The sand-filling funnel (3) is lower than the main chamber body. A chamber door (201) is hinged on the main chamber body. The chamber door (201) is provided with an observation window (202) and two operation ports (203). The pressure tank (4) is provided with a sand inlet and a sand outlet at the top and bottom respectively. The pressure tank (4) is provided with an exhaust port. The sand inlet of the pressure tank (4) is connected to the discharge port of the sand funnel (3). The sand outlet of the pressure tank (4) is connected to an outlet pipe (11). The end of the outlet pipe (11) away from the pressure tank (4) is connected to a pipe joint (10). A valve body (12) is installed on the outlet pipe (11). The pressurization system is connected to the first end of the tee connector (7), and the second end of the tee connector (7) is connected to the first end of the pipe connector (10) through a pipe; the sealing mechanism (20) is installed inside the pressurization tank (4), and the third end of the tee connector (7) is connected to the sealing mechanism (20) through a pressure pipe (30); The spray gun assembly includes a sandblasting pipe (9) and a spray gun connected together, with one end of the sandblasting pipe (9) away from the spray gun connected to the second end of the pipe connector (10). The pressurization system injects compressed gas into the pressurization tank (4) and the sealing mechanism (20) through the three-way connector (7); when compressed gas is injected into the sealing mechanism (20), the sealing mechanism (20) operates to seal the sand inlet; The exhaust control mechanism (18) is sealed and installed on the exhaust port of the pressurized tank (4) to control the opening and closing of the exhaust port.

2. The high-pressure sandblasting machine according to claim 1, characterized in that, The pressurization system includes an air compressor, an air inlet connector (15), an air supply pipe (29), and a first air inlet hose (6). One end of the first air inlet hose (6) is connected to the first end of the three-way connector (7), and the second end of the first air inlet hose (6) is connected to one end of the air supply pipe (29). The air inlet connector (15) and the air supply pipe (29) are connected by a connecting pipe (17). The air compressor is connected to the air inlet connector (15) through a pipeline.

3. A high-pressure sandblasting machine according to claim 2, characterized in that, The system includes a support frame (1), a sandblasting chamber (2) mounted on the support frame (1), an operating plate (5) on the support frame (1), the back of the operating plate (5) facing the pressurizing tank (4), and an air supply pipe (29) mounted on the back of the operating plate (5); the pressurizing system includes a solenoid valve (14) and a pressure regulating valve (13), the solenoid valve (14) and the pressure regulating valve (13) being mounted sequentially on the air supply pipe (29).

4. A high-pressure sandblasting machine according to claim 3, characterized in that, The pressurization system includes a pressure detection mechanism, which includes a first pressure gauge (502) installed on the operation panel (5). The first pressure gauge (502) is connected to the air supply pipe (29) through a first pressure measuring tube (16).

5. A high-pressure sandblasting machine according to claim 1, characterized in that, The sealing mechanism (20) includes a vertical cylinder (2001), a sealing head (2004), and a rubber sleeve (2003). The bottom end of the vertical cylinder (2001) is sealed, and its top end has an opening. An air inlet is provided on the side wall of the vertical cylinder (2001). One end of the pressure pipe (30) is sealed to the air inlet. The vertical cylinder (2001) is lower than the sand inlet of the pressure tank (4) and is coaxial with the sand inlet. The vertical cylinder (2001) has a limiting groove on its outer circumferential surface near its top surface. The sealing head (2004) is sleeved on the limiting groove. The inner wall of the sealing head (2004) is provided with a limiting block. The limiting groove and the limiting block cooperate to limit the movement distance of the sealing head (2004) along the axial direction of the vertical cylinder (2001). The rubber sleeve (2003) is sleeved on the sealing head (2004).

6. A high-pressure sandblasting machine according to claim 1, characterized in that, The exhaust port of the pressurized tank (4) is connected to an exhaust pipe (402). The exhaust control mechanism (18) includes a pipe seat (181), a cylinder (183), a pressure relief pipe (186), and a plug (184). The pipe seat (181) has a first opening, an inner cavity, and a second opening that are connected. The first opening of the pipe seat (181) is fixedly connected to the exhaust pipe (402). The cylinder (183) is sealed and installed at the second opening of the pipe seat (181). A round hole is opened on the side wall of the pipe seat (181). One end of the pressure relief pipe (186) is sealed and installed in the round hole on the side wall of the pipe seat (181). The plug (184) is located at the output end of the cylinder (183). The cylinder (183) is used to push the plug (184) to move along the axial direction of the pipe seat (181) to block or open the first opening of the pipe seat (181).

7. A high-pressure sandblasting machine according to claim 3, characterized in that, The pressure detection mechanism includes a second pressure gauge (503) and a second pressure measuring tube (19). A pipe fitting is installed on the top surface of the pressurizing tank (4). One end of the second pressure measuring tube (19) is connected to the pipe fitting, and the other end is connected to the second pressure gauge (503). The second pressure gauge (503) is installed on the operating plate (5).

8. A high-pressure sandblasting machine according to claim 1, characterized in that, At least one horizontally arranged support net (23) is installed inside the main compartment, and at least one interception net (24) is installed inside the sand filling funnel (3).

9. A high-pressure sandblasting machine according to any one of claims 1-8, characterized in that, The system includes a dust removal assembly, which includes a dust collector (22). The main compartment is provided with at least one exhaust window, and a dust collector (22) is installed at each exhaust window.

10. A high-pressure sandblasting machine according to any one of claims 1-8, characterized in that, At least one lighting lamp (21) is installed on the inner top wall of the main compartment.

Images