Automatic wet sand spray washing production line

Abstract

The utility model relates to the technical field of surface treatment, and particularly discloses an automatic wet sand spray washing production line which comprises a conveying device used for conveying workpieces. A sand blasting module used for blasting sand to the workpiece, a sweeping module used for sweeping the workpiece and a washing and drying module used for washing and drying the workpiece are sequentially arranged along the conveying device; wherein the sand blasting module comprises a sand blasting water jet positioned above the conveying device, a water jet driving mechanism for driving the sand blasting water jet to move, and a sand water supply system for supplying sand water to the sand blasting water jet. The automatic wet sand spraying production line provided by the utility model can realize mechanical sand spraying operation, so that the labor cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of surface treatment, in particular to an automated wet sand blasting and washing production line. Background Technique

[0002] The wet sand blasting surface treatment process is a technology that uses a sand water pump to spray a mixture of sand and water onto the surface of a workpiece at a certain pressure, mainly used for cleaning, rust removal or matte treatment. Compared with dry sand blasting, this process has less dust and less environmental impact, but attention needs to be paid to preventing re-rusting caused by moisture. Usually, 1% - 15% of rust inhibitors and emulsifiers or soapy water are added to the water to prevent rusting. The wet sand blasting technology is widely used in surface treatment before electroplating and painting, internal and external degreasing and rust removal of mechanical and electrical parts, cleaning, polishing and rough machining of glass, metal and molds, and other fields.

[0003] Currently, workshop workers mainly manually transport workpieces to each workstation to perform corresponding sand blasting processes, which not only has a high labor cost but also a low production efficiency.

[0004] Therefore, the utility model is committed to researching and developing an automated wet sand blasting and washing production line for realizing mechanized sand blasting operations, thereby reducing labor costs and improving production efficiency.

[0005] The above information disclosed in this background section is only included to enhance the understanding of the background of the present disclosure, and thus may include information that does not form the prior art known to those of ordinary skill in the art at present. Summary of the Utility Model

[0006] An object of the utility model is to provide an automated wet sand blasting and washing production line that can realize mechanized sand blasting operations, thereby reducing labor costs and improving production efficiency.

[0007] To achieve the above object, the utility model provides an automated wet sand blasting and washing production line, including a conveying device for conveying workpieces, and successively arranged along the conveying device are a sand blasting module for sand blasting the workpieces, a cleaning module for brushing the workpieces, and a washing and drying module for cleaning and drying the workpieces;

[0008] Wherein, the sand blasting module includes a sand blasting water knife located above the conveying device, a water knife driving mechanism for driving the sand blasting water knife to move, and a sand water supply system for supplying sand water to the sand blasting water knife.

[0009] Optionally, the conveying device includes a long rotating shaft, a rotating shaft rotation driving mechanism for driving the long rotating shaft to rotate, a plurality of transverse rotating shafts arranged at uniform intervals along the length direction of the long rotating shaft and driven by the long rotating shaft to rotate, and a plurality of conveying wheels sleeved on each of the transverse rotating shafts and rotating synchronously with the corresponding transverse rotating shaft.

[0010] Optionally, the end position of each transverse rotating shaft close to the long rotating shaft is in transmission connection with the long rotating shaft through a set of bevel gear sets.

[0011] Optionally, the sandblasting water jet includes:

[0012] An air inlet assembly, which is provided with an air inlet chamber and an air inlet gap communicating the air inlet chamber to the external space of the air inlet assembly;

[0013] A water inlet assembly, which is installed at the bottom of the air inlet assembly and cooperates with the air inlet assembly to enclose and form a water jet inner cavity;

[0014] An air knife assembly, which is located in the water jet inner cavity and is provided with an air inlet channel extending from top to bottom and communicating with the air inlet gap, and a water inlet groove is provided on the surface of the air knife assembly close to the water inlet assembly;

[0015] A water passing assembly, the upper part of which is located between the air knife assembly and the water inlet assembly and cooperates with the water inlet assembly to enclose and form a water inlet channel communicating with the water inlet groove; the lower part of the water passing assembly extends below the air knife assembly and is provided with a mixing channel communicating with the air inlet channel and the water inlet channel;

[0016] A nozzle assembly, which is located below the water inlet assembly and is provided with a sandblasting gap communicating with the mixing channel;

[0017] Wherein, the length dimensions of the air inlet channel, the water inlet channel, and the mixing channel are equal.

[0018] Optionally, both the air knife assembly and the water passing assembly are made of tungsten steel;

[0019] The surface of the air knife assembly close to the water inlet assembly is further provided with a T-shaped groove, and an internal inlay for tightly connecting with the water inlet assembly is inserted in the T-shaped groove;

[0020] The internal inlay is provided with a plurality of threaded holes, and the water inlet assembly is provided with bolt holes corresponding to each of the threaded holes.

[0021] Optionally, the width dimension of the air inlet channel is 1.1 mm to 1.3 mm, the width dimension of the water inlet channel is 0.4 mm to 0.6 mm, and the width dimension of the mixing channel is 1.8 mm to 2.0 mm; the width dimension of the sand blasting gap is 1.3 mm to 1.5 mm.

[0022] Optionally, the sand and water supply system includes:

[0023] A circulating sand box for uniformly stirring sand grains and water;

[0024] A water supply unit for adding water to the circulating sand box;

[0025] A sand supply unit for adding sand grains to the circulating sand box;

[0026] A concentration meter connected to the circulating sand box for detecting the sand and water concentration in the circulating sand box;

[0027] A control device electrically connected to the water supply unit, the sand supply unit, and the concentration meter respectively;

[0028] A timer electrically connected to the control device for sending an instruction to the control device at preset intervals to trigger the water supply unit to add water.

[0029] Optionally, the sand and water supply system further includes:

[0030] A drain valve connected to the lower part of the circulating sand box and electrically connected to the control device for discharging the sand and water in the circulating sand box to the outside;

[0031] A counter electrically connected to the timer and the control device respectively for recording the number of times the timer sends an instruction.

[0032] Optionally, the circulating sand box includes:

[0033] A sand box housing provided with a sand box inner cavity;

[0034] Stirring blades located in the sand box inner cavity;

[0035] A stirring motor located outside the sand box housing and drivingly connected to the stirring blades;

[0036] A plurality of first water inlet spray heads, each of the first water inlet spray heads located in the sand box inner cavity and spraying water towards the stirring blades;

[0037] A plurality of second water inlet nozzles, each of the second water inlet nozzles is located in the inner cavity of the sand box and sprays water towards the bottom of the inner cavity of the sand box.

[0038] Optionally,

[0039] The bottom surface of the inner cavity of the sand box is a conical surface, and the conical surface is provided with a discharge valve that is recessed downward and communicated to the outside of the circulating sand box through the discharge valve.

[0040] The beneficial effects of the present invention are as follows: An automated wet sand spraying and washing production line is provided. The workpiece is placed on the conveying device and conveyed downward by the conveying device; then, the sand blasting module performs sand blasting on the workpiece; then, the cleaning module cleans the foreign matters on the surface of the workpiece; finally, the washing and drying module uses clean water to wash the surface of the workpiece, completely removes the foreign matters, and then dries the workpiece. Thus, the mechanized sand blasting operation can be completed, thereby reducing labor costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0042] Figure 1 It is a schematic structural diagram of the automated wet sand spraying and washing production line provided for the embodiment;

[0043] Figure 2 It is a schematic structural diagram of the sand blasting water knife provided for the embodiment;

[0044] Figure 3 It is an exploded view of the sand blasting water knife provided for the embodiment;

[0045] Figure 4 It is a sectional view of the sand blasting water knife provided for the embodiment;

[0046] Figure 5 It is a schematic structural diagram of the sand and water supply system provided for the embodiment;

[0047] Figure 6 It is an internal schematic diagram of the circulating sand box provided for the embodiment;

[0048] Figure 7 It is a top view of the circulating sand box provided for the embodiment;

[0049] Figure 8 It is a sectional view of the circulating sand box provided for the embodiment;

[0050] Figure 9Schematic structural diagram of the cleaning module provided for the embodiment;

[0051] Figure 10 Schematic structural diagram of the washing and drying module provided for the embodiment.

[0052] In the figure:

[0053] 100, conveying device; 100a, long rotating shaft; 100b, rotating shaft rotation driving mechanism; 100c, transverse rotating shaft; 100d, conveying wheel; 100e, bevel gear set;

[0054] 200, sandblasting module;

[0055] 200a, sandblasting water knife;

[0056] 1, air intake assembly; 101, air chamber cover; 1011, air intake chamber; 102, air intake partition; 1021, air intake gap; 103, air intake joint;

[0057] 2, water inlet assembly; 201, water inlet joint; 202, bolt hole;

[0058] 3, air knife assembly; 301, air inlet channel; 302, T-shaped groove; 303, water inlet groove;

[0059] 4, water passing assembly; 401, water passing block; 4011, inclined plate; 4011a, water inlet channel; 4012, vertical plate; 402, mixing channel;

[0060] 5, nozzle assembly; 501, sandblasting gap; 502, nozzle outer frame; 503, boron carbide tool body;

[0061] 6, upper gasket;

[0062] 7, lower gasket;

[0063] 8, internal insert;

[0064] 200b, water knife driving mechanism;

[0065] 200c, sand and water supply system;

[0066] 9, circulating sand box;

[0067] 901, sand box housing; 9011, sand box inner cavity; 9011a, conical surface; 9011b, discharge groove;

[0068] 902, stirring blade;

[0069] 903, stirring motor;

[0070] 904, first water inlet spray head;

[0071] 905. Second water inlet nozzle;

[0072] 906. Circulation pump;

[0073] 10. Water supply unit;

[0074] 11. Sand supply unit;

[0075] 12. Concentration meter;

[0076] 13. Control device;

[0077] 14. Drain valve;

[0078] 15. Sand delivery water unit; 1501. Sand pumping water pump; 1502. Sand delivery water pipeline;

[0079] 16. Liquid level sensor;

[0080] 300. Cleaning module; 300a. Cold air supply box; 300b. Brush disk; 300c. Brush disk rotation drive mechanism;

[0081] 400. Washing and drying module; 400a. Spray pipe; 400b. Hot air supply box. Detailed implementation manners

[0082] In the present utility model, referring to "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present utility model. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present utility model, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0083] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which the present utility model belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit the present utility model.

[0084] In the description of the present utility model, the term "and / or" is an expression for describing the logical relationship between objects, indicating that there can be three relationships, for example, A and / or B, which means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " herein generally represents an "or" logical relationship between the related objects before and after.

[0085] In the present utility model, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary or sequential relationships between these entities or operations.

[0086] Without further limitation, in the present utility model, the expressions such as "comprising", "including", "having" or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method or product including the said elements. Thus, in a process, method or product including a series of elements, it may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0087] Similar to the understanding in the "Examination Guidelines", in the present utility model, expressions such as "greater than", "less than", "exceeding" are understood not to include the number itself; expressions such as "above", "below", "within" are understood to include the number itself. In addition, in the description of the embodiments of the present utility model, the meaning of "a plurality of" is two or more (including two), and similar expressions related to "many" are understood in the same way, such as "a plurality of groups", "a plurality of times", etc., unless otherwise specifically defined.

[0088] In the description of the embodiments of the present utility model, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiment or the attached drawings. It is only for the convenience of describing the specific embodiments of the present utility model or for the reader to understand, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present utility model.

[0089] Unless otherwise clearly specified or limited, in the description of the embodiments of the present utility model, the terms such as "installed", "connected", "joined", "fixed", "set" should be understood in a broad sense. For example, the said "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present utility model pertains, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0090] The utility model provides an automated wet sand blasting production line, which is suitable for application scenarios where sand blasting is performed on the top surface of a workpiece, and can realize mechanized sand blasting operations, thereby reducing labor costs and improving production efficiency.

[0091] See also Figure 1 The automatic wet sandblasting production line includes a conveyor 100 for conveying workpieces, and a sandblasting module 200 for sandblasting the workpieces, a cleaning module 300 for sweeping the workpieces, and a washing and drying module 400 for cleaning and drying the workpieces are arranged in sequence along the conveyor 100. The sandblasting module 200 includes a sandblasting water jet 200a ( Figure 1 The sandblasting water jet 200a is located below the water jet driving mechanism 200b, not shown), the water jet driving mechanism 200b driving the sandblasting water jet 200a to move, and the sand and water supply system 200c for providing sand and water to the sandblasting water jet 200a.

[0092] The automated wet sand blasting production line provided in this embodiment has the following working process:

[0093] S10: placing the workpiece into the conveying device 100, and conveying the workpiece downward by the conveying device 100;

[0094] See also Figure 1 In this embodiment, the conveying device 100 includes a long rotating shaft 100a, a rotating shaft rotation driving mechanism 100b for driving the long rotating shaft 100a to rotate, a plurality of transverse rotating shafts 100c evenly spaced along the length direction of the long rotating shaft 100a and driven by the long rotating shaft 100a to rotate, and a plurality of conveying wheels 100d sleeved on each of the transverse rotating shafts 100c and rotating synchronously with the corresponding transverse rotating shafts 100c.

[0095] Optionally, each of the transverse rotating shafts 100c is connected to the long rotating shaft 100a at its end position close to the long rotating shaft 100a via a set of bevel gear sets 100e.

[0096] When the shaft rotation driving mechanism 100b drives the long shaft 100a to rotate, the long shaft 100a can drive all the lateral shafts 100c to rotate synchronously through the bevel gear sets 100e, thereby driving the conveying wheel 100d to rotate, thereby causing the workpiece on the conveying wheel 100d to flow forward.

[0097] S20: the sandblasting module 200 performs sandblasting on the workpiece;

[0098] The sand-water supply system 200c transports the mixed sand and water to the abrasive water jet 200a. The water jet driving mechanism 200b (the water jet driving mechanism 200b is mainly used to drive the abrasive water jet 200a to move relative to the workpiece and can be composed of several linear modules. Its specific structure is not the focus of this embodiment, so it will not be elaborated) drives the abrasive water jet 200a to reciprocate above the workpiece, and then sprays the sand and water onto the top surface of the workpiece for surface treatment.

[0099] First, refer to Figures 2 to 4 , and introduce the abrasive water jet 200a.

[0100] The abrasive water jet 200a provided in this embodiment includes an air intake component 1, a water intake component 2, an air knife component 3, a water passing component 4, and a nozzle component 5.

[0101] The air intake component 1 is provided with an air intake chamber 1011 and an air intake gap 1021 that communicates the air intake chamber 1011 to the external space of the air intake component 1. The water intake component 2 is installed at the bottom of the air intake component 1 and cooperates with the air intake component 1 to enclose and form a water jet inner cavity. The air duct component is located in the water jet inner cavity and is provided with an air inlet channel 301 that extends downward from top to bottom and communicates with the air intake gap 1021. The surface of the air knife component 3 close to the water intake component 2 is provided with a water inlet groove 303.

[0102] The upper part of the water passing component 4 is located between the air knife component 3 and the water intake component 2 and cooperates with the water intake component 2 to enclose and form two water inlet channels 4011a that communicate with the water inlet groove 303; wherein, the two water inlet channels 4011a are symmetrically arranged with respect to the air inlet channel 301; the lower part of the water passing component 4 extends below the air knife component 3 and is provided with a mixing channel 402 that communicates with the air inlet channel 301 and the water inlet channels 4011a.

[0103] The nozzle component 5 is located below the water intake component 2 and is provided with an abrasive jet gap 501 that communicates with the mixing channel 402; wherein, the length dimensions of the air inlet channel 301, the water inlet channels 4011a, and the mixing channel 402 are equal.

[0104] Optionally, the abrasive water jet 200a further includes a water inlet joint 201 that communicates with the water inlet groove 303.

[0105] The abrasive water jet 200a provided in this embodiment operates as follows: Compressed air is fed into the air inlet chamber 1011, and sand-water is fed into the water inlet tank 303. The compressed air is transported downward through the air inlet gap 1021 and the air inlet channel 301 to the mixing channel 402, and the sand-water is transported to the mixing channel 402 through the water inlet channel 4011a. After the compressed air and the sand-water are mixed in the mixing channel 402, they are ejected outward through the abrasive jet gap 501 to wash the surface of the workpiece and complete the surface treatment operation on the workpiece.

[0106] During the above process:

[0107] On the one hand, the two water inlet channels 4011a inside the water jet are symmetrically distributed about the air inlet channel 301 on the left and right, and the length dimension of each water inlet channel 4011a is equal to the length dimension of the air inlet channel 301, ensuring uniform air and water supply to the entire mixing channel 402.

[0108] On the other hand, the sand-water flows down from the two side water inlet tanks 303 through the water inlet channels 4011a, and the compressed air is blown down through a certain air inlet channel. The high-speed air flow pressurizes the sand-water in the mixing channel 402 to accelerate the ejection of the sand-water. At the same time, the high-speed air flow also forms a low-pressure adsorption phenomenon on the sand-water in the two water inlet channels 4011a above the mixing channel 402, causing it to flow uniformly and quickly to the mixing channel 402, further improving the uniformity of the ejected sand-water.

[0109] Therefore, the abrasive water jet 200a provided by the present utility model can effectively improve the uniformity of the ejected sand-water, thereby improving the abrasive blasting treatment effect.

[0110] In this embodiment, the air inlet assembly 1 includes an air chamber cover 101 and an air inlet partition 102. The air chamber cover 101 is provided with the air inlet chamber 1011 with an opening facing downward; the air inlet partition 102 is located below the air chamber cover 101 and is provided with the air inlet gap 1021 communicating with the air inlet chamber 1011. A plurality of air inlet connectors 103 communicating with the air inlet chamber 1011 are connected to the air chamber cover 101.

[0111] Optionally, an upper gasket 6 is provided between the air chamber cover 101 and the air inlet partition 102, and a lower gasket 7 is provided between the water inlet assembly 2 and the nozzle assembly 5.

[0112] In this embodiment, the air chamber cover 101 is locked to the top surface of the air inlet partition 102 by bolts from top to bottom, and the water passing assembly 4 is locked to the bottom surface of the air inlet partition 102 by bolts from bottom to top.

[0113] In this embodiment, both the air knife assembly 3 and the water passing assembly 4 are made of tungsten steel. Inside the abrasive water jet 200a, the flow rates of air and abrasive water are very fast. The widths of the air inlet channel 301 and the water inlet channel 4011a are relatively small, and the wear is relatively serious. Using conventional metal materials, the service life is extremely short. In this embodiment, both the air knife assembly 3 and the water passing assembly 4 are made of tungsten steel to extend the service life.

[0114] Optionally, a T-shaped groove 302 is further provided on the surface of the air knife assembly 3 close to the water inlet assembly 2, and an internal insert 8 for tightly connecting with the water inlet assembly 2 is inserted in the T-shaped groove 302. Since it is difficult to tap threads on tungsten steel parts, in this embodiment, an internal insert 8 that is easy to tap threads is embedded inside the air knife assembly 3 to facilitate the tight connection between the air knife assembly 3 and the water inlet assembly 2.

[0115] Further, a plurality of threaded holes are provided in the internal insert 8, and bolt holes 202 are provided at the positions of the water inlet assembly 2 corresponding to each of the threaded holes. After using bolts to horizontally pass through the bolt holes 202 and then threadedly connect them to the corresponding threaded holes, the air knife assembly 3 and the water inlet assembly 2 can be locked.

[0116] In this embodiment, the water passing assembly 4 includes two oppositely arranged water passing blocks 401. The upper part of the water passing block 401 is an inclined plate 4011 that matches the air knife assembly 3, and the lower part is a vertical plate 4012; the lower part of the air knife assembly 3 is inserted between the two inclined plates 4011, and the air duct assembly and each inclined plate 4011 cooperate to form a water inlet channel 4011a.

[0117] Optionally, the width dimension of the air inlet channel is 1.1 mm to 1.3 mm, the width dimension of the water passing channel is 0.4 mm to 0.6 mm, the width dimension of the mixing channel 402 is 1.8 mm to 2.0 mm; the width dimension of the abrasive jet gap 501 is 1.3 mm to 1.5 mm.

[0118] After a large amount of research and experiments, it is found that when using the abrasive water jet 200a with the above-mentioned dimensional matching for abrasive blasting operations, the sprayed abrasive water curtain is most evenly distributed, and the appearance uniformity of the workpiece after abrasive blasting is very excellent.

[0119] Optionally, the nozzle assembly 5 includes a nozzle outer frame 502 and two oppositely arranged boron carbide cutter bodies 503. The nozzle outer frame 502 is fixedly arranged at the bottom of the water passing assembly 4; the two boron carbide cutter bodies 503 are located inside the nozzle outer frame 502 and enclose to form the abrasive jet gap 501.

[0120] It should be noted that the sandblasting gap 501 is the position with the greatest wear. The sand and water are pressurized by compressed gas, with a greater flow rate, and the friction between the sand grains and the inner wall of the nozzle is the most severe. In this embodiment, a boron carbide tool body 503 with a relatively high hardness is used to surround and form the sandblasting gap 501, which can be compatible with sandblasting of sand grains with different hardnesses. Currently, it can withstand the sandblasting of silicon carbide sand grains, with a service life of more than 1000 hours, and can be quickly repaired and reused for the second time.

[0121] In summary, the sandblasting water jet 200a provided in this embodiment has the following beneficial effects:

[0122] ① Improve the sandblasting uniformity: By designing two symmetric water inlet channels 4011a and a mixing channel 402 of the same length as the air inlet channel 301, the uniform mixing of compressed air and sand water is ensured, thereby improving the sandblasting uniformity.

[0123] ② Enhance the sandblasting effect: The high-speed air flow pressurizes the sand water, causing it to be ejected at an accelerated speed. At the same time, a low-pressure adsorption phenomenon is formed, making the sand water flow more uniformly and quickly towards the mixing channel 402, further enhancing the sandblasting effect.

[0124] ③ Prolong the service life: Tungsten steel parts are used as the air knife assembly 3 and the water passing assembly 4, improving the wear resistance and prolonging the service life of the sandblasting water jet 200a.

[0125] ④ Facilitate maintenance and replacement: By setting the T-shaped groove 302 and the internal insert 8, the connection method between the air knife assembly 3 and the water inlet assembly 2 is simplified, facilitating maintenance and replacement.

[0126] ⑤ Precise dimension design: Through precise design of the width dimensions of the air inlet channel, water passing channel, mixing channel 402, and sandblasting gap 501, the uniformity of the ejected sand water curtain is ensured, improving the uniformity of the workpiece appearance.

[0127] ⑥ High-wear-resistant nozzle design: A boron carbide tool body 503 is used to form the sandblasting gap 501, improving the wear resistance of the nozzle, being compatible with sand grains of different hardnesses, prolonging the service life of the nozzle, and facilitating secondary repair and reuse.

[0128] Next, refer to Figures 5 to 8 , and introduce the sand and water supply system 200c.

[0129] The present utility model provides a sand-water supply system 200c, which includes a circulating sand box 9, a water supply unit 10, a sand supply unit 11, a concentration meter 12, a control device 13, and a timer. The circulating sand box 9 is used for uniformly stirring sand grains and water; the water supply unit 10 is used for adding water to the circulating sand box 9; the sand supply unit 11 is used for adding sand grains to the circulating sand box 9; the concentration meter 12 is connected to the circulating sand box 9 and is used for detecting the sand-water concentration in the circulating sand box 9; the control device 13 is electrically connected to the water supply unit 10, the sand supply unit 11, and the concentration meter 12 respectively; the timer is electrically connected to the control device 13 and is used for sending an instruction to the control device 13 every preset time interval to trigger the water supply unit 10 to add water.

[0130] Optionally, the timer is integrated inside the control device 13.

[0131] In the sand-water supply system 200c provided in this embodiment, the timer can time the sand and water addition time, and send an instruction to the control device 13 every preset time interval (for example, 30 min), so that the water supply unit 10 adds water to the circulating sand box 9 and the sand supply unit 11 adds sand grains to the circulating sand box 9; after the sand and water are added, the concentration meter 12 detects the concentration of the sand water in the circulating sand box 9. When the sand-water concentration reaches the preset value, the control device 13 can control the water supply unit 10 to stop adding water and control the sand supply unit 11 to stop adding sand, thereby ensuring the stability of the sand-water concentration.

[0132] Since the timer sends an instruction every preset time interval to automatically add water and sand, even if part of the water inside the circulating sand box 9 is evaporated during the sand addition process, it can be replenished in time when adding water regularly; similarly, even if the sand grains inside the circulating sand box 9 become smaller and rounder, large and angular sand grains can be replenished in time during regular sand addition to ensure that the surface treatment effect of the sandblasted workpiece meets the requirements. In this way, the sand water can be reused, thereby extending the service life of the sand water.

[0133] Therefore, the sand-water supply system 200c provided in this embodiment can effectively solve the problems of poor stability of the sand-water concentration in the sand box of the existing sand-water supply system and short service life of the sand water.

[0134] Optionally, the sand supply unit 11 includes a loss-in-weight scale for measuring the sand addition amount. It should be noted that the loss-in-weight scale is an automatic weighing device that realizes high-precision continuous quantitative feeding through static weighing. It can feed dry bulk materials such as powders, granules, and flakes reliably, accurately, and stably, reducing material waste and improving the consistency of the mixture.

[0135] In this embodiment, the loss-in-weight scale is mainly used for quantitatively feeding and metering sand particles. Existing products on the market can be adopted, and the specific structure of the loss-in-weight scale is not the focus of this embodiment, so it will not be elaborated here.

[0136] The sand and water supply system 200c further includes a liquid level sensor 16, which is located in the circulating sand box 9 and electrically connected to the control device 13 for detecting the liquid level in the circulating sand box 9.

[0137] Optionally, the water supply unit 10 includes an electric valve electrically connected to the liquid level sensor, a water inlet pipe connected to the circulating sand box 9 through the electric valve, an intelligent water meter and a pneumatic diaphragm valve electrically connected to the control device, and a water replenishing pipe connected to the circulating sand box 9 through the pneumatic diaphragm valve.

[0138] Generally, when the circulating sand box 9 is filled with water from an empty state, the electric valve is controlled according to the detection signal of the liquid level sensor 16. That is, when the liquid level sensor 16 detects that the liquid level in the box reaches the upper limit value, the electric valve is shut down to cut off the water supply of the water inlet pipe.

[0139] If sand and water are added in the middle, it is realized through the intelligent water meter and the pneumatic diaphragm valve. The control device 13 calculates how much water needs to be added according to the detection result of the concentration meter 12, and then the intelligent water meter can measure how much water has flowed through. After reaching the required amount of water, the pneumatic diaphragm valve closes the water replenishing pipe to stop water replenishment.

[0140] When the liquid level in the circulating sand box 9 reaches the lower limit value, the control device 13 can control the water supply unit 10 and the sand supply unit 11 to start adding water and sand particles; when the liquid level in the circulating sand box 9 reaches the upper limit value, the control device 13 can control the water supply unit 10 and the sand supply unit 11 to stop adding water and sand particles.

[0141] It should be noted that whenever the liquid level in the circulating sand box 9 reaches the upper limit value, if it waits until the liquid level in the circulating sand box 9 reaches the lower limit value again before adding water and sand, during the slow decline of the liquid level, problems such as water evaporation and sand particle rounding are likely to occur. In this embodiment, since the timer can trigger the addition of water and sand regularly, even if the liquid level has not dropped to the lower limit value, as long as the preset time has elapsed since the last addition of water and sand was completed, the addition of water and sand will be automatically carried out, thereby solving the problems such as water evaporation and sand particle rounding that cause the decline of the sandblasting effect.

[0142] The sand and water supply system 200c further includes a drain valve 14 and a counter. The drain valve 14 is connected to the lower part of the circulating sand box 9 and is electrically connected to the control device 13, and is used to discharge the sand and water in the circulating sand box 9. The counter is electrically connected to the timer and the control device 13, respectively, and is used to record the number of times the timer sends instructions.

[0143] In this embodiment, under the action of the timer, water and sand need to be added regularly. The volume of the circulating sand box 9 is fixed and water and sand cannot be added infinitely. Therefore, a counter can be set to count. After adding water and sand for several times (for example, 3 times), the drain valve 14 is controlled to discharge sand water outward once, which is equivalent to draining some old sand water and adding some new sand and water. The drain valve 14 is set at the bottom to drain the round sand deposited at the bottom as much as possible and keep the newly added sharp sand as much as possible (the newly added sand is on the upper layer).

[0144] Optionally, the concentration meter 12 is a Coriolis flowmeter, which can measure not only the concentration of sand and water, but also the flow rate and density, so as to achieve more intelligent control.

[0145] The sand and water supply system 200c further includes a sand and water delivery unit 15. The sand and water delivery unit 15 includes a sand pump 1501 for pumping sand and water out of the circulating sand box 9, and a sand and water delivery pipeline 1502 connected to the outlet of the sand pump 1501.

[0146] The sand pump 1501 extracts the sand and water in the circulating sand box 9 and transports them to the sandblasting water jet so that the sandblasting water jet sprays sand and water to perform surface treatment operations on the workpiece.

[0147] Furthermore, a Coriolis flowmeter is installed in the sand-feeding water pipeline 1502, which can detect the concentration of sand and water and monitor the flow rate of sand and water delivered to the sandblasting water jet.

[0148] See also Figures 1 to 4 The utility model provides a circulating sand box 9, including a sand box shell 901, a stirring blade 902, a stirring motor 903, a plurality of first water inlet nozzles 904, and a plurality of second water inlet nozzles 905.

[0149] The sand box shell 901 is provided with a sand box inner cavity 9011; the stirring blade 902 is located in the sand box inner cavity 9011; the stirring motor 903 is located outside the sand box shell 901 and is transmission-connected to the stirring blade 902; each of the first water inlet nozzles 904 is located in the sand box inner cavity 9011 and sprays water toward the stirring blade 902; each of the second water inlet nozzles 905 is located in the sand box inner cavity 9011 and sprays water toward the bottom of the sand box inner cavity 9011.

[0150] When the specific gravity of the sand particles is relatively large, the sand and water are prone to sedimentation, and the uniformity of the concentration of the sand and water stirred by the rotation of the traditional blades is relatively poor. The circulating sand box 9 provided in this embodiment, on the basis of the rotation and stirring of the traditional blades, combines the first water inlet nozzle 904 and the second water inlet nozzle 905 to perform sand and water circulation impact stirring, and combines the stirring blades 902 to increase the flow rate of the sand and water, and finally achieves the uniform stirring effect of the large-particle sand and water.

[0151] In the circulating sand box 9 provided in this embodiment, the first water inlet nozzle 904 directly sprays water in an impact manner towards the position with a slow flow rate at the rotation center of the stirring blade 902. The formed water column can disperse the deposited sand particles, reduce the direct contact between the sand particles and the stirring blade 902, reduce the friction force, accelerate the flow of the sand and water at the rotation center position, prevent the sand particles from sedimenting, and ensure the uniformity of the sand and water concentration in the sand box; at the same time, the second water inlet nozzle 905 sprays water towards the bottom of the cavity to help the sand particles re-suspend, reduce the deposition of the sand particles on the stirring blade 902, and ensure the smooth operation of the stirring system. Such a design improves the reliability of the system, reduces the maintenance requirements, and improves the production efficiency.

[0152] Therefore, the circulating sand box 9 provided in this embodiment can effectively solve the problem of uneven stirring caused by the easy sedimentation of large-particle sand particles.

[0153] In this embodiment, the stirring blade 902 is located at the central position of the inner cavity 9011 of the sand box; each of the first water inlet nozzles 904 and each of the second water inlet nozzles 905 are arranged at intervals along the edge of the inner cavity 9011 of the sand box.

[0154] The stirring blade 902 is located at the central position, ensuring the uniformity of stirring and enabling the sand and water mixture to uniformly diffuse from the center to the outside. The first water inlet nozzle 904 and the second water inlet nozzle 905 are arranged at intervals along the edge. Such a layout can effectively cover the entire inner cavity 9011 of the sand box, ensure the uniform distribution of water spraying, further prevent the accumulation of sand particles on the stirring blade 902, and improve the uniformity of stirring of the stirring blade 902.

[0155] Optionally, both the first water inlet nozzle 904 and the second water inlet nozzle 905 are arranged to incline downward. The first water inlet nozzle 904 and the second water inlet nozzle 905 are arranged to incline downward. Such a design helps to more effectively disperse the stagnant sand and water, prevent the sand particles from accumulating at the bottom or on the blades, and thus maintain the smooth operation of the stirring system.

[0156] Specifically, the central axis of the first water inlet nozzle 904 intersects with the central axis of the sand box housing 901, and the distance dimension between the central axis of the first water inlet nozzle 904 and the central axis of the sand box housing 901 gradually decreases from top to bottom.

[0157] The central axis of the second water inlet nozzle 905 is skew to the central axis of the sand box housing 901, and the water spraying direction of the second water inlet nozzle 905 matches the rotation direction when the stirring blade 902 is driven to rotate, so as to cooperate with the stirring blade 902 to boost the rotation of the sand and water.

[0158] That is, the first water inlet nozzle 904 sprays water substantially along the radial direction of the sand box housing 901, so that the sand and water deposited at the central rotating shaft of the stirring blade 902 become loose, so that the stirring blade 902 can continue to rotate for stirring operations;

[0159] The second water inlet nozzle 905 sprays water substantially along the tangential direction of the sand box housing 901, so that the sand and water deposited at the blade end of the stirring blade 902 become loose, so that the stirring blade 902 can continue to rotate for stirring operations.

[0160] In the circulating sand box 9 of this embodiment, the central axis of the first water inlet nozzle 904 intersects the central axis of the sand box housing 901, and the distance dimension gradually decreases from top to bottom. Such a design enables the sprayed water to act more concentratedly above the stirring blade 902, effectively preventing the accumulation of sand grains on the stirring blade 902, thereby improving the uniformity of stirring of the stirring blade 902.

[0161] The central axis of the second water inlet nozzle 905 is skew to the central axis of the sand box housing 901, and the water spraying direction matches the rotation direction of the stirring blade 902. Such a design helps to reduce the resistance suffered by the stirring blade 902 during rotation, making the stirring process smoother. For example, when the stirring blade 902 rotates clockwise, the second water inlet nozzle 905 also tilts clockwise to boost the sand and water and increase the rotation speed of the sand and water, thereby maintaining the stable operation of the stirring system.

[0162] In this embodiment, the bottom surface of the sand box inner cavity 9011 is a conical surface 9011a. Such a design helps the sand and water mixture to naturally gather towards the center during the stirring process, especially the larger-sized sand grains, reducing the deposition of sand grains at the bottom, improving the stirring efficiency, and also improving the uniformity of stirring of the stirring blade 902.

[0163] Furthermore, a downwardly concave discharge groove 9011b is provided on the bottom surface of the sand box inner cavity 9011. In the circulating sand box 9 of this embodiment, a downwardly concave discharge groove 9011b is provided on the bottom surface of the sand box inner cavity 9011, and then the discharge groove 9011b is connected to the outside of the circulating sand box 9 and / or the circulating pump 906 through a discharge valve. Generally, the larger-sized and difficult-to-stir sand grains will be deposited in the discharge groove 9011b. The provision of the discharge groove 9011b is conducive to preferentially discharging the over-sized sand grains in the circulating sand box 9 during outward discharge, further reducing the deposition of sand grains at the bottom.

[0164] The circulating sand box 9 further includes a circulating inlet pipe connected to the upper part of the inner cavity 9011 of the sand box, a circulating outlet pipe connected to the bottom of the inner cavity 9011 of the sand box, and a circulating pump 906 connecting the circulating inlet pipe and the circulating outlet pipe. By adding the circulating inlet pipe, the circulating outlet pipe and the circulating pump 906, a closed circulating system is formed, enabling the sand-water mixture to continuously circulate within the circulating sand box 9, improving the utilization rate of sand and water and the stirring efficiency, reducing the deposition of sand grains at the same time, and enhancing the uniformity of the stirring of the stirring blades 902.

[0165] In summary, the circulating sand box 9 provided in this embodiment has the following advantages:

[0166] ① The first water inlet nozzle 904 and the second water inlet nozzle 905 can effectively disperse the deposited sand and water, reducing the accumulation of sand grains at the bottom or on the blades.

[0167] ② The stirring blade 902 at the central position and the first water inlet nozzle 904 and the second water inlet nozzle 905 arranged at intervals along the edge work together to ensure the uniform diffusion of the sand-water mixture from the center to the outside, effectively reducing the accumulation of sand grains on the rotating blades and improving the stirring uniformity; combined with the inner cavity design at the bottom of the conical surface 9011a, it promotes the movement of sand grains, reduces the deposition of sand grains, and further improves the stirring uniformity of the stirring blade 902.

[0168] ③ The closed circulating system, including the circulating inlet pipe, the circulating outlet pipe and the circulating pump 906, and the design of the drainage trough 9011b, improves the circulating utilization rate of sand and water and the stirring efficiency, reduces the deposition of sand grains, and ensures the smooth operation of the system.

[0169] Optionally, the water supply unit 10 further includes a water spraying branch for supplying water to the first water inlet nozzle 904 and the second water inlet nozzle 905.

[0170] The sand-water supply system 200c provided in this embodiment has the following advantages:

[0171] ① Automatic intelligent control: Through the linkage of a timer, a concentration meter 12, a liquid level sensor 16, etc. with the control device 13, automatic water addition and sand addition are realized, ensuring the stability of the sand-water concentration, reducing manual operation, and improving work efficiency.

[0172] ② Precise quantitative management: By using a flow meter and a loss-in-weight scale, precise control of the water addition amount and the sand addition amount is achieved, ensuring the quality of the sand-water mixture and improving the workpiece surface treatment effect.

[0173] ③ Safe and reliable operation: The addition of the liquid level sensor 16 effectively prevents abnormal liquid levels, ensures the stable operation of the system, and reduces safety risks at the same time; the combined use of the counter and the drain valve 14 helps to regularly discharge the old sand and water, ensuring the long-term stable operation of the system.

[0174] ④ The design of the circulating sand box 9 at the bottom of the conical surface 9011a improves the stirring efficiency, reduces the sand particle deposition, and enhances the overall performance of the system.

[0175] S30: The cleaning module 300 cleans the foreign matters on the surface of the workpiece.

[0176] See Figure 9 , in this embodiment, the cleaning module 300 includes a cold air supply box 300a for blowing air on the workpiece after sandblasting, several brush disks 300b located above the conveying device 100, and a brush disk rotation driving mechanism 300c for driving each brush disk 300b to rotate to brush the top surface of the workpiece.

[0177] First, the sand particles and debris on the surface of the workpiece are blown away by the cold air supply box 300a, and then the brush disk 300b is used for brushing, so that the preliminary cleaning operation can be completed.

[0178] S40: The washing and drying module 400 uses clean water to wash the surface of the workpiece, completely removes the foreign matters, and then dries the workpiece to complete the surface treatment of the workpiece.

[0179] See Figure 10 , the washing and drying module 400 includes a spray pipe 400a located above the conveying device 100 and a hot air supply box 400b located downstream of the spray pipe 400a.

[0180] First, the spray pipe 400a sprays clean water on the workpiece for cleaning operation to wash away the dirt and debris, and then the hot air supply box 400b blows hot air on the workpiece to dry the workpiece, thereby completing the entire sandblasting operation.

[0181] In summary, the automated wet sandblasting and washing production line provided by this embodiment has the following advantages:

[0182] ① Automatic sandblasting operation: After the workpiece is placed on the conveying device 100, the conveying device 100 automatically conveys it downward. Then, under the combined action of the sandblasting module 200, the cleaning module 300, and the washing and drying module 400, the sandblasting and cleaning processes of the workpiece are sequentially executed, thereby completing the mechanized sandblasting operation, reducing the labor cost, and improving the production efficiency.

[0183] ② Uniform sandblasting treatment: By designing two symmetric water inlet channels 4011a and equal-length mixing channels 402, the sandblasting water knife 200a can achieve uniform mixing of compressed air and sand water, significantly improving the sandblasting uniformity and treatment effect.

[0184] ③ High wear-resistant nozzle design: The boron carbide cutter body 503 is used to form the sandblasting gap 501, which improves the wear resistance of the nozzle, is compatible with sand grains of different hardnesses, extends the service life of the nozzle, and facilitates secondary repair and reuse;

[0185] ④ Intelligent sand and water supply: The timer, concentration meter 12 and liquid level sensor 16 are used to achieve automatic water and sand addition, ensuring the stability of the sand-water concentration, reducing manual operation and improving work efficiency;

[0186] ⑤ Precise quantitative management: The application of the flow meter and loss-in-weight scale realizes precise control of the water addition amount and sand addition amount, ensures the quality of the sand-water mixture, and improves the surface treatment effect of the workpiece;

[0187] ⑥ Efficient stirring design: The circulating sand box 9 is combined with a specially designed water inlet nozzle and stirring blade 902, which improves the uniform stirring effect of large-particle sand and water, prevents the stirring blade 902 from getting stuck, and ensures the smooth operation of the system.

[0188] It should be noted that the linear drive mechanism mentioned in the present utility model can be a cylinder, a hydraulic cylinder, an electric cylinder or a motor screw linear module, etc., and the rotary drive mechanism mentioned can be a brushed motor, a brushless motor or a rotary cylinder, etc. The specific structural forms of the linear drive mechanism and the rotary drive mechanism of the present utility model are not limited.

[0189] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of the present application and using the content recorded in the text and drawings of the specification of the present application, as well as those directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. An automated wet sand blasting and washing production line, characterized in that, It comprises a conveying device (100) for conveying a workpiece, wherein a sandblasting module (200) for sandblasting the workpiece, a cleaning module (300) for brushing the workpiece, and a washing and drying module (400) for cleaning and drying the workpiece are sequentially arranged along the conveying device (100); The sandblasting module (200) comprises a sandblasting water jet (200a) located above the conveying device (100), a water jet driving mechanism (200b) for driving the sandblasting water jet (200a) to move, and a sand and water supply system (200c) for providing sand and water to the sandblasting water jet (200a).

2. The automated wet sand blasting production line according to claim 1, wherein, The conveying device (100) comprises a long rotating shaft (100a), a rotating shaft rotation driving mechanism (100b) for driving the long rotating shaft (100a) to rotate, a plurality of transverse rotating shafts (100c) evenly spaced along the length direction of the long rotating shaft (100a) and driven to rotate by the long rotating shaft (100a), and a plurality of conveying wheels (100d) sleeved on each of the transverse rotating shafts (100c) and rotating synchronously with the corresponding transverse rotating shaft (100c).

3. The automated wet sand blasting and washing production line according to claim 2, characterized in that, The end position of each of the transverse rotating shafts (100c) close to the long rotating shaft (100a) is transmission-connected to the long rotating shaft (100a) via a set of bevel gear sets (100e).

4. The automated wet sand blasting and washing production line according to claim 1, wherein The sandblasting water jet (200a) comprises: An air intake assembly (1), the air intake assembly (1) being provided with an air intake chamber (1011) and an air intake gap (1021) connecting the air intake chamber (1011) to an external space of the air intake assembly (1); A water inlet assembly (2), the water inlet assembly (2) being mounted on the bottom of the air inlet assembly (1) and cooperating with the air inlet assembly (1) to surround and form a water jet inner cavity; An air knife assembly (3), the air knife assembly (3) being located in the inner cavity of the water knife and being provided with an air inlet channel (301) extending from top to bottom and connected to the air inlet gap (1021), and a water inlet groove (303) being provided on a surface of the air knife assembly (3) close to the water inlet assembly (2); a water flow assembly (4), wherein the upper portion of the water flow assembly (4) is located between the wind knife assembly (3) and the water inlet assembly (2), and cooperates with the water inlet assembly (2) to surround and form a water inlet channel (4011a) connected to the water inlet groove (303); the lower portion of the water flow assembly (4) extends to below the wind knife assembly (3), and is provided with a mixing channel (402) connected to the air inlet channel (301) and the water inlet channel (4011a); A nozzle assembly (5), the nozzle assembly (5) being located below the water inlet assembly (2) and being provided with a sandblasting gap (501) connected to the mixing channel (402); The air inlet channel (301), the water inlet channel (4011a), and the mixing channel (402) are of equal length.

5. The automated wet sand blasting and washing production line according to claim 4, wherein, The air knife assembly (3) and the water flow assembly (4) are both tungsten steel parts; On the surface of the air knife assembly (3) close to the water inlet assembly (2), there is also a T-shaped groove (302), and an internal insert (8) for tightly connecting with the water inlet assembly (2) is inserted in the T-shaped groove (302); The internal insert (8) is provided with a plurality of threaded holes, and the water inlet assembly (2) is provided with bolt holes (202) at positions corresponding to each of the threaded holes.

6. The automated wet sand blasting and washing production line according to claim 4, wherein The width dimension of the air inlet channel (301) is 1.1 mm to 1.3 mm, the width dimension of the water inlet channel (4011a) is 0.4 mm to 0.6 mm, and the width dimension of the mixing channel (402) is 1.8 mm to 2.0 mm; the width dimension of the sand blasting gap (501) is 1.3 mm to 1.5 mm.

7. The automated wet sand blasting and washing production line according to claim 1, characterized in that The sand-water supply system (200c) includes: A circulating sand box (9) for evenly stirring sand grains and water; A water supply unit (10) for adding water to the circulating sand box (9); A sand supply unit (11) for adding sand grains to the circulating sand box (9); A densitometer (12) connected to the circulating sand box (9) for detecting the sand-water concentration in the circulating sand box (9); A control device (13) electrically connected to the water supply unit (10), the sand supply unit (11), and the densitometer (12) respectively; A timer electrically connected to the control device (13) for sending an instruction to the control device (13) at every preset time interval to trigger the water supply unit (10) to add water.

8. The automated wet sand blasting production line according to claim 7, wherein The sand-water supply system (200c) further includes: A drain valve (14) connected to the lower part of the circulating sand box (9) and electrically connected to the control device (13) for discharging the sand-water in the circulating sand box (9) to the outside; A counter electrically connected to the timer and the control device (13) respectively for recording the number of times the timer sends an instruction.

9. The automated wet sand blasting production line according to claim 7, characterized in that, The circulating sand box (9) includes: A sand box housing (901) provided with a sand box inner cavity (9011); Stirring blades (902) located in the sand box inner cavity (9011); A stirring motor (903) located outside the sand box housing (901) and drivingly connected to the stirring blades (902); A plurality of first water inlet nozzles (904) located in the sand box inner cavity (9011) and spraying water towards the stirring blades (902); A plurality of second water inlet nozzles (905) located in the sand box inner cavity (9011) and spraying water towards the bottom of the sand box inner cavity (9011).

10. The automated wet sand spraying and washing production line according to claim 9, wherein The bottom surface of the inner cavity (9011) of the sand box is a conical surface (9011a), and the conical surface (9011a) is provided with a discharge valve (14) that is recessed downward and communicates with the outside of the circulating sand box (9) through the discharge valve (14).

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