Multi-angle shot blasting equipment for casting volute inner cavity

Abstract

The utility model discloses multi-angle shot blasting equipment for an inner cavity of a cast volute. The problems that a traditional shot blasting machine is too low in volute shot blasting efficiency, troublesome to use by workers and the like are effectively solved. Comprising a shell and a working platform arranged in the middle of the shell, the interior of the shell is divided into a working cavity and an equipment cavity by the working platform, a plurality of collecting holes are formed in the working platform, a funnel-shaped collecting hopper is arranged below the working platform, and a pressure tank is fixed to the bottom of the collecting hopper; the spray nozzle is ingenious in structure and convenient to use, through the arrangement of the dispersing pipe, the gear ring, the connecting rods and the like, a user holds the spray nozzle with one hand, when shot blasting is conducted on an inner cavity of the volute, the thumb rotates the rotating disc, the gear ring drives the gears to rotate, and the connecting rods drive the arc-shaped strips to be dispersed or gathered. Axial injection of sand grains is changed into radial injection under the guide of the dispersing pipe, and the nozzle is particularly suitable for shot blasting of the straight cylinder part of the volute, does not need to change angles for multiple times, saves time and labor, and improves the flexibility and universality of the nozzle.

Description

Technical Field

[0001] The utility model relates to the technical field of sandblasting and shot blasting equipment, in particular to a multi-angle shot blasting equipment for the inner cavity of a casting volute. Background Technique

[0002] In a shot blasting machine (sandblasting machine), compressed air is used in a pipeline to transport powdery particles (with a diameter of 1 - 4 mm) from one place to another. During the process of converting kinetic energy into potential energy, the high-speed moving sand grains scour the surface of an object, achieving the effect of improving the surface quality of the object.

[0003] Chinese Patent with the application number CN202223106067.2 discloses a special sandblasting nozzle for the flow channel of a turbine housing, which includes a connecting sleeve, a nozzle body and an extended spray pipe. The connecting sleeve is in a cylindrical shape. One end of the connecting sleeve is connected to the rubber hose of the sandblasting machine, and the other end is provided with an internal thread. A conical hole is provided in the nozzle body. The small end of the conical hole forms a discharge port, and the large end of the conical hole forms a feed port. A connecting section is provided at the feed port end of the nozzle body, and the connecting section is provided with an external thread. The nozzle body is connected to the internal thread of the connecting sleeve through the connecting section. A counterbore is provided at the discharge port end of the nozzle body, and the counterbore is provided with an internal thread. The extended spray pipe is a slender round pipe. The inner end of the extended spray pipe is threadedly connected to the counterbore of the nozzle body, and the inner hole diameter of the extended spray pipe is the same as the inner diameter of the discharge port of the nozzle body. The utility model has a simple and compact structure, low manufacturing cost, is used for cleaning the oxide layer on the surface of the turbine housing flow channel, is convenient to operate, improves the product qualification rate and ensures the product quality.

[0004] When the existing sandblasting and shot blasting equipment performs sandblasting on the volute, due to the peculiar structure of the volute, it is generally divided into a straight cylinder part with a larger diameter and a curved part with a smaller diameter and more curvature. When processing the volute, the existing nozzles use a direct spraying method to perform shot blasting on the inner cavity of the volute. When processing the straight cylinder part, it is necessary to take the straight cylinder part as the center and change multiple angles to perform sandblasting on the inner wall of the straight cylinder part, and the process is very troublesome. Content of the Utility Model

[0005] Aiming at the above problems, the present invention provides a multi-angle shot blasting equipment for the inner cavity of a casting volute, which has the advantages of simple structure, strong practicability and more flexible shot blasting angles.

[0006] The technical solution it adopts is that the utility model includes a housing and a working platform placed in the middle of the housing. The working platform divides the interior of the housing into a working chamber and an equipment chamber. A plurality of collection holes are opened on the working platform. A funnel-shaped collection hopper is arranged below the working platform. A pressure tank is fixed at the bottom of the collection hopper. A rubber spray pipe is arranged at the top of the working chamber. The rubber spray pipe is communicated with the pressure tank. A nozzle is fixed on the rubber spray pipe. A working hole is opened on one side of the housing. A protective glove is arranged in the working hole. An observation window is opened on the side wall of the housing above the protective glove.

[0007] A dispersion tube is coaxially arranged in the nozzle. The dispersion tube is composed of a plurality of arc-shaped strips evenly distributed in a circle. The bottom of the dispersion tube is in a horn shape. L-shaped connecting rods are fixed at the tops of the plurality of arc-shaped strips. The connecting rod includes a vertical part and a horizontal part. One end of the horizontal part penetrates through the nozzle. A threaded track is opened on the horizontal part. A turntable is coaxially rotated on the outer wall of the nozzle. A toothed ring is coaxially fixed at the bottom of the turntable. A plurality of convex blocks evenly distributed in a circle are fixed at the outer edge of the turntable. A plurality of gears matching the connecting rod are arranged below the toothed ring. The plurality of gears are all meshed with the toothed ring. The gears are rotatably connected to the outer wall of the nozzle. The gears are threadedly connected to the horizontal part.

[0008] Preferably, a protective shell is coaxially fixed on the outer wall of the nozzle. A plurality of through holes evenly distributed in a circle are opened on the protective shell. The through holes match the horizontal part and the diameter of the through holes is larger than the diameter of the connecting rod.

[0009] Preferably, arc-shaped blocks are fixed at the tops of the plurality of arc-shaped strips. The plurality of arc-shaped blocks form a semi-circle. The vertical part is fixedly connected to the arc-shaped block.

[0010] Preferably, the nozzle includes a holding part and an outward-expanding part. The diameter of the outward-expanding part is larger than the diameter of the holding part. The difference in diameter between the outward-expanding part and the holding part is larger than the width of the arc-shaped block. The diameter of the horn shape at the bottom of the dispersion tube is larger than the diameter of the outward-expanding part.

[0011] Preferably, the materials of the dispersion tube and the connecting rod are boron carbide, tungsten steel or silicon carbide.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Through the settings of the dispersion pipe, toothed ring, connecting rod, etc., when the user holds the nozzle with one hand and performs shot peening on the inner cavity of the volute, the thumb rotates the turntable, the toothed ring drives multiple gears to rotate, and multiple connecting rods drive the arc-shaped strips to disperse or gather. When the multiple arc-shaped strips gather together, the sand grains change from axial spraying to radial spraying under the guidance of the dispersion pipe, which is particularly suitable for shot peening the straight cylinder part of the volute and does not require changing the angle multiple times, saving time and effort. After reversing the rotation of the turntable, the multiple arc-shaped strips disperse, and the sand grains become axial spraying again for sandblasting the bent part. The advantage of this setting is that the shot peening speed of the volute is faster, and the worker does not need to adjust the angle of the nozzle multiple times, improving the flexibility and universality of the nozzle.

[0014] 2. Through the settings of the outward expansion part, etc., when the multiple arc-shaped strips disperse, the arc-shaped strips are basically within the outward expansion part, minimizing the influence of the arc-shaped strips on the sand grains to the greatest extent. Description of the Drawings

[0015] Figure 1 is the three-dimensional view of the present utility model.

[0016] Figure 2 is the structural schematic diagram of the working chamber in the present utility model.

[0017] Figure 3 is the schematic diagram of the protective shell and connecting parts in the present utility model.

[0018] Figure 4 is the schematic diagram of the cooperation between the turntable and the gears in the present utility model.

[0019] Figure 5 is the structural schematic diagram of the arc-shaped block in the present utility model.

[0020] Figure 6 is the schematic diagram of the volute in the present utility model.

[0021] Explanation of the reference numerals in the schematic diagrams:

[0022] 1. Housing; 2. Working platform; 3. Working chamber; 4. Equipment chamber; 5. Collection hopper; 6. Pressure tank; 7. Rubber spray pipe; 8. Nozzle; 9. Working hole; 10. Observation window; 11. Arc-shaped strip; 12. Connecting rod; 13. Vertical part; 14. Horizontal part; 15. Thread track; 16. Turntable; 17. Toothed ring; 18. Gear; 19. Protective shell; 20. Through hole; 21. Arc-shaped block; 22. Holding part; 23. Outward expansion part; 24. Straight cylinder part; 25. Bent part. Detailed Implementation Modes

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] given by Figures 1 to 5 shown in , including a housing 1 and a working platform 2 placed in the middle of the housing 1. The working platform 2 divides the interior of the housing 1 into a working chamber 3 and an equipment chamber 4. A plurality of collection holes are provided on the working platform 2. A funnel-shaped collection hopper 5 is arranged below the working platform 2. A pressure tank 6 is fixed at the bottom of the collection hopper 5. A rubber spray pipe 7 is arranged at the top of the working chamber 3. The rubber spray pipe 7 is communicated with the pressure tank 6. A nozzle 8 is fixed on the rubber spray pipe 7. It should be noted that the equipment also includes a dust removal fan, a separator and other devices. Since such technologies are relatively mature, they will not be elaborated here. A working hole 9 is provided on one side of the housing 1. A protective glove is arranged in the working hole 9. An observation window 10 is provided on the side wall of the housing 1 above the protective glove. When the shot blasting equipment is in use, first place the workpiece into the working chamber 3. The worker's arm extends into the protective glove and holds the workpiece with one hand. Adjust the processing angle of the workpiece at all times through the observation window 10. Start the shot blasting equipment. The sand grains in the equipment are ejected from the nozzle 8. Just aim the nozzle 8 at the processing surface.

[0025] The inner cavity of the volute is generally divided into a straight cylinder part 24 with a larger diameter and a curved part 25 with a smaller diameter and more curvature. When processing the volute, the existing nozzle 8 uses a direct injection method to perform shot peening on the inner cavity of the volute, resulting in the need for workers to continuously adjust the angle when using the nozzle 8. For example, when processing the straight cylinder part 24, it is necessary to take the straight cylinder part 24 as the center of the circle and change multiple angles to perform sandblasting on the inner wall of the straight cylinder part 24, and the process is very troublesome. A dispersion tube is coaxially arranged in the nozzle 8. The dispersion tube is composed of a plurality of arc-shaped strips 11 evenly distributed in a circle. The bottom of the dispersion tube is in a flared shape. L-shaped connecting rods 12 are fixed to the tops of the plurality of arc-shaped strips 11. The connecting rod 12 includes a vertical part 13 and a horizontal part 14. One end of the horizontal part 14 penetrates through the nozzle 8. A threaded track 15 is provided on the horizontal part 14. A turntable 16 is coaxially rotated on the outer wall of the nozzle 8. A toothed ring 17 is coaxially fixed to the bottom of the turntable 16. A plurality of convex blocks evenly distributed in a circle are fixed to the outer edge of the turntable 16. A plurality of gears 18 matching the connecting rod 12 are arranged below the toothed ring 17. The gears 18 are rotatably connected to the outer wall of the nozzle 8. The plurality of gears 18 are all engaged with the toothed ring 17. The gears 18 are threadedly connected to the horizontal part 14. A connection hole is provided at the center of the gear 18. A connection block is fixed in the connection hole. The connection block is matched with and slidably connected to the threaded track 15. When the gear 18 rotates, the connecting rod 12 moves horizontally under the action of the threaded track 15 and the connection block, so that the plurality of arc-shaped strips 11 are dispersed or gathered. Through the settings of the dispersion tube, the toothed ring 17 and the connecting rod 12, etc., the user holds the nozzle 8 with one hand. When performing shot peening on the inner cavity of the volute, the thumb rotates the turntable 16, the toothed ring 17 drives the plurality of gears 18 to rotate, and the plurality of connecting rods 12 drive the arc-shaped strips 11 to be dispersed or gathered. When the plurality of arc-shaped strips 11 are gathered together, the sand grains are changed from axial injection to radial injection under the guidance of the dispersion tube, which is particularly suitable for performing shot peening on the straight cylinder part 24 of the volute. When performing shot peening on the straight cylinder part 24, the nozzle 8 is inserted along the axis of the straight cylinder part 24, and only the insertion depth needs to be adjusted, without the need to change the angle multiple times, which saves time and effort. After the turntable 16 is rotated in the reverse direction, the plurality of arc-shaped strips 11 are dispersed, and the sand grains become axial injection again to perform sandblasting on the curved part 25. The advantage of such a setting is that the shot peening speed of the volute is faster, and the worker does not need to adjust the angle of the nozzle 8 multiple times, which improves the flexibility and universality of the nozzle 8.

[0026] Reference Figure 3 and Figure 4As shown, considering that when the gear 18 and the gear ring 17 are exposed externally, sand grains may affect the meshing between the gear 18 and the rack, a protective shell 19 is coaxially fixed on the outer wall of the nozzle 8. A plurality of through holes 20 are circumferentially and uniformly arranged on the protective shell 19. The through holes 20 are matched with the horizontal part 14 and the diameter of the through holes 20 is larger than the diameter of the connecting rod 12. When the plurality of arc-shaped strips 11 are separated, the connecting rod 12 is inserted into the through holes 20.

[0027] Reference Figure 5 As shown, when the plurality of arc-shaped strips 11 are gathered, in order to prevent sand grains from accumulating on the tops of the arc-shaped strips 11, arc-shaped blocks 21 are fixed to the tops of the plurality of arc-shaped strips 11. The plurality of arc-shaped blocks 21 form a semi-circle, and the vertical part 13 is fixedly connected to the arc-shaped blocks 21.

[0028] Reference Figure 3 and Figure 4 As shown, considering that when the plurality of arc-shaped strips 11 are dispersed from each other, the arc-shaped strips 11 may block the axially ejected sand grains, the nozzle 8 includes a holding part 22 and an outward expanding part 23. The diameter of the outward expanding part 23 is larger than the diameter of the holding part 22. The difference in diameter between the outward expanding part 23 and the holding part 22 is larger than the width of the arc-shaped block 21. The diameter of the bottom trumpet shape of the dispersion tube is larger than the diameter of the outward expanding part 23. When the plurality of arc-shaped strips 11 are dispersed, the arc-shaped strips 11 are basically located inside the outward expanding part 23, minimizing the influence of the arc-shaped strips 11 on the sand grains to the greatest extent.

[0029] The dispersion tube and the connecting rod 12 are made of boron carbide, tungsten steel or silicon carbide.

[0030] When the present utility model is in use:

[0031] First, the workpiece is first placed into the working chamber 3. The worker's arm extends into the protective glove and holds the workpiece with one hand. The processing angle of the workpiece is adjusted at all times through the observation window 10. The shot blasting equipment is started, and the sand grains in the equipment are ejected from the nozzle 8, and the nozzle 8 is aligned with the processing surface.

[0032] Then, when shot blasting the straight tube part 24 of the volute, the thumb rotates the turntable 16, the gear ring 17 drives the plurality of gears 18 to rotate. When the plurality of arc-shaped strips 11 are gathered together, the sand grains are changed from axial ejection to radial ejection under the guidance of the dispersion tube, and the straight tube part 24 of the volute is shot blasted. During the sand blasting, the insertion depth of the nozzle 8 can be appropriately adjusted.

[0033] Secondly, when sand blasting the bent part 25, the turntable 16 is rotated in the reverse direction, and the plurality of arc-shaped strips 11 are dispersed, and the sand grains become axial ejection again.

[0034] Finally, the volute after shot blasting is taken out.

[0035] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-angle shot blasting device for the inner cavity of a casting volute, comprising a housing (1) and a working platform (2) disposed in the middle of the housing (1), characterized in that: The working platform (2) divides the interior of the shell (1) into a working chamber (3) and an equipment chamber (4); a plurality of collecting holes are provided on the working platform (2); a funnel-shaped collecting hopper (5) is provided below the working platform (2); a pressure tank (6) is fixed to the bottom of the collecting hopper (5); a rubber nozzle (7) is provided at the top of the working chamber (3); the rubber nozzle (7) is connected to the pressure tank (6); a nozzle (8) is fixed to the rubber nozzle (7); a working hole (9) is provided on one side of the shell (1); a protective glove is provided in the working hole (9); and an observation window (10) is provided on the side wall of the shell (1) and is located above the protective glove; A dispersion tube is coaxially arranged inside the nozzle (8), and the dispersion tube is composed of a plurality of arc-shaped strips (11) uniformly distributed around the circumference. The bottom of the dispersion tube is trumpet-shaped, and an L-shaped connecting rod (12) is fixed to the top of the plurality of arc-shaped strips (11). The connecting rod (12) includes a vertical portion (13) and a horizontal portion (14). One end of the horizontal portion (14) passes through the nozzle (8), and a threaded track (15) is provided on the horizontal portion (14). The outer surface of the nozzle (8) A turntable (16) is coaxially rotated on the wall, a gear ring (17) is coaxially fixed to the bottom of the turntable (16), a plurality of circumferentially evenly distributed protrusions are fixed to the outer edge of the turntable (16), a plurality of gears (18) matching the connecting rod (12) are arranged below the gear ring (17), the plurality of gears (18) are all meshed with the gear ring (17), the gears (18) are rotatably connected to the outer wall of the nozzle (8), and the gears (18) are threadedly connected to the horizontal portion (14).

2. The multi-angle shot blasting equipment for the inner cavity of a casting volute according to claim 1 is characterized in that: A protective shell (19) is coaxially fixed on the outer wall of the nozzle (8), and a plurality of through holes (20) evenly distributed around the circumference are formed on the protective shell (19), wherein the through holes (20) match the horizontal portion (14) and the diameter of the through holes (20) is greater than the diameter of the connecting rod (12).

3. The multi-angle shot blasting equipment for the inner cavity of a casting volute according to claim 1 is characterized in that: A curved block (21) is fixed to the top of each of the plurality of curved strips (11), the plurality of curved blocks (21) form a semicircle, and the vertical portion (13) is fixedly connected to the curved block (21).

4. The multi-angle shot blasting equipment for the inner cavity of a casting volute according to claim 1 is characterized in that: The nozzle (8) comprises a gripping portion (22) and an outward expansion portion (23); the diameter of the outward expansion portion (23) is greater than the diameter of the gripping portion (22); the difference in diameter between the outward expansion portion (23) and the gripping portion (22) is greater than the width of the arc block (21); and the diameter of the trumpet-shaped bottom of the dispersion tube is greater than the diameter of the outward expansion portion (23).

5. The multi-angle shot blasting equipment for the inner cavity of a casting volute according to claim 1 is characterized in that: The dispersion tube and the connecting rod (12) are made of boron carbide, tungsten steel or silicon carbide.

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