Sand water supply system

Abstract

The utility model relates to the technical field of sand blasting equipment, and particularly discloses a sand-water supply system, which comprises a circulating sand box, a sand water tank, a sand water tank and a sand water tank, the water supply unit is used for adding water into the circulating sand box; the sand supply unit is used for adding sand grains into the circulating sand box; the concentration meter is communicated to the circulating sand box and is used for detecting the concentration of sand water in the circulating sand box; the control device is electrically connected to the water supply unit, the sand supply unit and the concentration meter respectively; and the timer is electrically connected to the control device and is used for sending instructions to the control device every preset time interval so as to trigger the water supply unit to add water. The sand water supply system provided by the utility model can effectively solve the problems that the sand water concentration stability in the sand box of the existing sand water supply system is poorer and the service life of the sand water is shorter.

Description

Technical Field

[0001] The utility model relates to the technical field of sandblasting equipment, in particular to a sand and water supply system. Background Art

[0002] When sandblasting is carried out, one of the important processes is to mix sand and water through a sand and water supply system and then transport them to a sandblasting water knife. The sand and water supply system generally includes a sand box for stirring, a water supply device for supplying water to the sand box, and a sand supply unit for sandblasting into the sand box.

[0003] Generally, when adding sand grains and water, a certain proportion is required to ensure the relative constancy of the sand grain content in the sand water. If the sand grain concentration in the sand water is too large or too small, it is difficult to achieve the preset surface treatment effect.

[0004] The existing sand and water supply system has the following problems:

[0005] During the process of the sand supply unit sandblasting into the sand box, the sandblasting bin inside the sand supply unit has a large space and a high temperature. The moisture in the sand box will partially evaporate into the sand supply unit, resulting in a decrease in the water content in the sand box. The decrease in the water content in the sand box will cause a change in the sand water concentration, that is, the stability of the sand water concentration in the sand box is poor;

[0006] The sand grains will become smaller in particle size and smoother in edges and corners with the sandblasting time, resulting in a weaker sandblasting impact force. The optical data (such as glossiness, roughness, etc.) of the workpiece surface obtained by sandblasting with this sand water will change, and the surface treatment effect is far from meeting the requirements. At this time, all the sand water must be replaced, and the reuse rate and service life of the sand water are relatively low.

[0007] Therefore, it is necessary to improve the existing sand and water supply system to solve the problems of poor stability of the sand water concentration in the sand box and short service life of the sand water.

[0008] 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 prior art known to those of ordinary skill in the art at present. Summary of the Utility Model

[0009] An object of the present utility model is to provide a sand and water supply system, which can effectively solve the problems of poor stability of the sand water concentration in the sand box and short service life of the sand water in the existing sand and water supply system.

[0010] To achieve the above object, the present utility model provides a sand and water supply system, including:

[0011] A circulating sand box for uniformly stirring sand grains and water;

[0012] A water supply unit for adding water to the circulating sand box;

[0013] A sand supply unit for adding sand grains to the circulating sand box;

[0014] A densitometer connected to the circulating sand box for detecting the sand-water concentration in the circulating sand box;

[0015] A control device electrically connected to the water supply unit, the sand supply unit, and the densitometer respectively;

[0016] 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.

[0017] Optionally, the sand supply unit includes a loss-in-weight scale for measuring the sand addition amount.

[0018] Optionally, it further includes:

[0019] A liquid level sensor located in the circulating sand box and electrically connected to the control device for detecting the liquid level in the circulating sand box.

[0020] Optionally, the water supply unit includes an electric valve electrically connected to the liquid level sensor, a water inlet pipe connected to the circulating sand box through the electric valve, an intelligent water meter and a pneumatic diaphragm valve electrically connected to the control device, and a make-up water pipe connected to the circulating sand box through the pneumatic diaphragm valve.

[0021] Optionally, it further includes:

[0022] An excretion valve connected to the lower part of the circulating sand box and electrically connected to the control device for discharging the sand water in the circulating sand box to the outside.

[0023] Optionally, it further includes:

[0024] A counter electrically connected to the timer and the control device respectively for recording the number of times the timer sends an instruction.

[0025] Optionally, the densitometer is a Coriolis flowmeter.

[0026] Optionally, it further includes:

[0027] A sand-water delivery unit including a sand-water pump for pumping out the sand water in the circulating sand box and a sand-water delivery pipeline connected to the outlet of the sand-water pump.

[0028] Optionally, the circulating sand box includes:

[0029] A sand box shell, wherein the sand box shell is provided with a sand box inner cavity;

[0030] A stirring blade, wherein the stirring blade is located in the inner cavity of the sand box;

[0031] A stirring motor is located outside the sand box housing and is drivingly connected to the stirring blades.

[0032] Optionally, the bottom surface of the inner cavity of the sand box is a conical surface.

[0033] The beneficial effects of the utility model are: providing a sand and water supply system, a timer can count the time of adding sand and water, and send instructions to the control device at every preset time interval, so that the water supply unit adds water to the circulating sand box and the sand supply unit adds sand to the circulating sand box; after adding sand and water, the concentration meter detects the concentration of the sand and water in the circulating sand box. When the concentration of the sand and water reaches the preset value, the control device can control the water supply unit to stop adding water and control the sand supply unit to stop adding sand, thereby ensuring the stability of the sand and water concentration.

[0034] Since the timer sends a command every preset time to automatically add water and sand, even if the water inside the circulating sand box is partially evaporated during the sand adding process, it can be replenished in time when adding water on time; similarly, even if the sand particles inside the circulating sand box become smaller and rounder, large particles and angular sand particles can be added in time during regular sand adding to ensure that the surface treatment effect of the sandblasted workpiece meets the requirements, so that the sand and water can be reused, thereby extending the service life of the sand and water.

[0035] Therefore, the sand and water supply system provided in this embodiment can effectively solve the problems of poor stability of sand and water concentration in the sand box of the existing sand and water supply system and short service life of the sand and water. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 A schematic diagram of the structure of the sand and water supply system provided in the embodiment;

[0038] Figure 2 An internal schematic diagram of a circulating sand box provided in an embodiment;

[0039] Figure 3 A top view of a circulating sand box provided in an embodiment;

[0040] Figure 4 Cross-sectional view of the circulating sand box provided for the embodiment.

[0041] In the figure:

[0042] 200c, sand and water supply system;

[0043] 9, circulating sand box;

[0044] 901, sand box housing; 9011, sand box inner cavity; 9011a, conical surface; 9011b, drainage groove;

[0045] 902, stirring blade;

[0046] 903, stirring motor;

[0047] 904, first water inlet spray head;

[0048] 905, second water inlet spray head;

[0049] 906, circulating pump;

[0050] 10, water supply unit;

[0051] 11, sand supply unit;

[0052] 12, concentration meter;

[0053] 13, control device;

[0054] 14, drain valve;

[0055] 15, sand and water delivery unit; 1501, sand pumping water pump; 1502, sand delivery water pipeline;

[0056] 16, liquid level sensor. Detailed implementation manners

[0057] 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.

[0058] Unless otherwise defined, the meanings of the technical terms used herein are the same as those generally 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.

[0059] In the description of the present utility model, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this article generally represents an "or" logical relationship between the associated objects before and after.

[0060] 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.

[0061] Without further limitation, in the present utility model, the expressions such as "comprising", "including", "having" or other similar expressions used in the statement are intended to cover non-exclusive inclusion. These expressions do not exclude 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 can not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to this process, method or product.

[0062] The same as the understanding in the "Examination Guidelines", in the present utility model, expressions such as "greater than", "less than", "exceeding" are understood as not including the number itself; expressions such as "above", "below", "within" are understood as including 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). Similar expressions related to "many", such as "a plurality of groups", "a plurality of times", etc., are also understood in this way, unless otherwise specifically defined.

[0063] 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., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the 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.

[0064] Unless otherwise clearly specified or defined, in the description of the embodiments of the present utility model, terms such as "installation", "connection", "linkage", "fixation", "setting", etc. shall be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those skilled in the technical field to which the present utility model belongs, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0065] Refer to Figures 1 to 4 , 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 stirring sand grains and water evenly; 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 at every preset time interval to trigger the water supply unit 10 to add water.

[0066] Optionally, the timer is integrated inside the control device 13.

[0067] For 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 at every preset time interval (such as 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 the sand supply unit 11 to stop adding sand, thereby ensuring the stability of the sand-water concentration.

[0068] Since the timer sends an instruction at 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-grained and angular sand grains can be replenished in time during regular sand addition to ensure that the surface treatment effect of the workpiece to be sandblasted meets the requirements, so that the sand water can be reused, thereby extending the service life of the sand water.

[0069] 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 and short service life of the sand-water in the existing sand-water supply system.

[0070] Optionally, the sand supply unit 11 includes a loss-in-weight scale for measuring the sand addition amount. It should be noted that a loss-in-weight scale is an automatic weighing device that realizes high-precision continuous quantitative feeding through static weighing. It can reliably, accurately and stably feed dry bulk materials such as powders, granules, and flakes, reduce material waste and improve the consistency of the mixture.

[0071] In this embodiment, the loss-in-weight scale is mainly used for quantitative feeding measurement of sand grains. It can adopt existing products on the market. The specific structure of the loss-in-weight scale is not the focus of this embodiment, so it will not be elaborated.

[0072] The sand-water supply system 200c further includes a liquid level sensor 16. The liquid level sensor 16 is located in the circulating sand box 9 and is electrically connected to the control device 13 for detecting the level of the liquid level in the circulating sand box 9.

[0073] 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.

[0074] Generally, when the circulating sand box 9 is filled with water from an empty box 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.

[0075] If sand and water are added midway, it is achieved 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. Then, the intelligent water meter can measure how much water has flowed through. After reaching the required water volume, the pneumatic diaphragm valve closes the water replenishing pipe to stop water replenishment.

[0076] 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 grains; 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 grains.

[0077] It should be noted that whenever the liquid level in the circulating sand box 9 reaches the upper limit value, if waiting until the liquid level in the circulating sand box 9 reaches the lower limit value again to add water and sand, during the slow decline of the liquid level, problems such as water evaporation and sand grain 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 grain rounding that lead to a decline in the sandblasting effect.

[0078] 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 for discharging the sand and water in the circulating sand box 9 to the outside. The counter is electrically connected to the timer and the control device 13 respectively for recording the number of times the timer sends instructions.

[0079] In this embodiment, under the action of the timer, it is necessary to add water and sand regularly. The volume of the circulating sand box 9 is fixed and cannot add water and sand infinitely. Therefore, a counter can be set for counting. After adding water and sand several times (for example, 3 times), the drain valve 14 is controlled to discharge the sand and water once, which is equivalent to discharging some old sand and water and adding some new sand grains and water. The drain valve 14 is arranged at the bottom to try to discharge the rounded sand grains deposited at the bottom and retain the newly added sharp sand grains (the newly added sand grains are in the upper layer) as much as possible.

[0080] Optionally, the concentration meter 12 is a Coriolis flowmeter. The Coriolis flowmeter can not only measure the concentration of sand and water, but also measure the flow rate and density, so as to achieve more intelligent control.

[0081] 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 pumping water pump 1501 for pumping out the sand and water in the circulating sand box 9 and a sand delivery water pipeline 1502 communicating with the outlet of the sand pumping water pump 1501.

[0082] The sand pumping water pump 1501 pumps out the sand and water in the circulating sand box 9 and transports it to the sandblasting water knife so that the sandblasting water knife sprays out the sand and water for surface treatment of the workpiece.

[0083] Furthermore, the Coriolis flowmeter is installed in the sand delivery water pipeline 1502, which can not only detect the concentration of sand and water, but also monitor the flow rate of the sand and water transported to the sandblasting water knife.

[0084] See Figures 1 to 4 , the present utility model provides a circulating sand box 9, including a sand box housing 901, stirring blades 902, a stirring motor 903, a plurality of first water inlet nozzles 904, and a plurality of second water inlet nozzles 905.

[0085] The sand box housing 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 housing 901 and is in transmission connection with the stirring blade 902; each of the first water inlet nozzles 904 is located in the sand box inner cavity 9011 and sprays water towards the stirring blade 902; each of the second water inlet nozzles 905 is located in the sand box inner cavity 9011 and sprays water towards the bottom of the sand box inner cavity 9011.

[0086] When the specific gravity of the sand grains 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 blade is relatively poor. The circulating sand box 9 provided in this embodiment, on the basis of the rotation and stirring of the traditional blade, 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 blade 902 to increase the flow velocity of the sand and water, and finally achieves the uniform stirring effect of the large-particle sand and water.

[0087] 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 where the flow velocity is slow at the rotation center of the stirring blade 902. The formed water column can disperse the deposited sand grains, reduce the direct contact between the sand grains 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 grains 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, helping the sand grains to re-suspend, reducing the deposition of the sand grains on the stirring blade 902, and ensuring 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.

[0088] 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 grains.

[0089] In this embodiment, the stirring blade 902 is located at the central position of the sand box inner cavity 9011; 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 sand box inner cavity 9011.

[0090] The stirring blade 902 is located at the central position, ensuring the uniformity of stirring, so that the sand and water mixture can 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 sand box inner cavity 9011, ensure the uniform distribution of water spraying, further prevent the accumulation of sand grains on the stirring blade 902, and improve the uniformity of stirring of the stirring blade 902.

[0091] Optionally, both the first water inlet nozzle 904 and the second water inlet nozzle 905 are arranged to incline downward. The downward inclination of the first water inlet nozzle 904 and the second water inlet nozzle 905 helps to more effectively disperse the stagnant sand and water, preventing sand grains from accumulating at the bottom or on the blades, thereby maintaining the smooth operation of the mixing system.

[0092] Specifically, the central axis of the first water inlet nozzle 904 intersects the central axis of the sand box housing 901, and the distance 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.

[0093] 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 mixing blade 902 is driven to rotate, so as to cooperate with the mixing blade 902 to boost the rotation of the sand and water.

[0094] That is, the first water inlet nozzle 904 sprays water substantially along the radial direction of the sand box housing 901, making the sand and water deposited at the central rotating shaft of the mixing blade 902 become loose, so that the mixing blade 902 can continue to rotate for mixing operations;

[0095] The second water inlet nozzle 905 sprays water substantially along the tangential direction of the sand box housing 901, making the sand and water deposited at the blade end of the mixing blade 902 become loose, so that the mixing blade 902 can continue to rotate for mixing operations.

[0096] 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 gradually decreases from top to bottom. This design enables the sprayed water to act more concentratedly above the mixing blade 902, effectively preventing sand grains from accumulating on the mixing blade 902, thereby improving the uniformity of mixing by the mixing blade 902.

[0097] 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 mixing blade 902. This design helps to reduce the resistance suffered by the mixing blade 902 during rotation, making the mixing process smoother. For example, when the mixing blade 902 rotates clockwise, the second water inlet nozzle 905 also inclines clockwise to boost the sand and water, increasing the rotation speed of the sand and water, thereby maintaining the stable operation of the mixing system.

[0098] In this embodiment, the bottom surface of the inner cavity 9011 of the sand box is a conical surface 9011a. Such a design helps the sand-water mixture to naturally gather towards the center during the stirring process, especially for sand grains with larger particle sizes, reducing the deposition of sand grains at the bottom, improving the stirring efficiency, and also enhancing the uniformity of the stirring by the stirring blades 902.

[0099] Furthermore, a downwardly concave discharge groove 9011b is provided on the bottom surface of the inner cavity 9011 of the sand box. In the circulating sand box 9 of this embodiment, a downwardly concave discharge groove 9011b is provided on the bottom surface of the inner cavity 9011 of the sand box, 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, sand grains with larger particle sizes that are difficult to stir will be deposited in the discharge groove 9011b. The setting of the discharge groove 9011b is beneficial for preferentially discharging sand grains that are too large in size in the circulating sand box 9 when discharging outward, further reducing the deposition of sand grains at the bottom.

[0100] 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 in the circulating sand box 9, improving the utilization rate of sand and water and the stirring efficiency, while also reducing the deposition of sand grains and enhancing the uniformity of the stirring by the stirring blades 902.

[0101] In summary, the circulating sand box 9 provided in this embodiment has the following advantages:

[0102] 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.

[0103] 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.

[0104] ③ The closed circulating system, including the circulating inlet pipe, the circulating outlet pipe and the circulating pump 906, and the design of the discharge groove 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.

[0105] 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.

[0106] The sand and water supply system 200c provided in this embodiment has the following advantages:

[0107] ① Automatic intelligent control: Through the linkage of a timer, a concentration meter 12, a liquid level sensor 16, etc. with a control device 13, automatic water and sand addition is realized, ensuring the stability of the sand-water concentration, reducing manual operation, and improving work efficiency.

[0108] ② Precise quantitative management: By using a flow meter and a loss-in-weight scale, precise control of the water addition amount and sand addition amount is achieved, ensuring the quality of the sand-water mixture and improving the workpiece surface treatment effect.

[0109] 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 a counter and a drain valve 14 helps to regularly discharge the old sand water, ensuring the long-term stable operation of the system.

[0110] ④ The design of the circulating sand box 9 at the bottom of the conical surface 9011a improves the stirring efficiency, reduces sand particle deposition, and enhances the overall performance of the system.

[0111] It should be noted that the linear drive mechanism mentioned in this 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 in this utility model are not limited.

[0112] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of this application, the patent protection scope of this application cannot be limited thereby. Any technical solution obtained by equivalent structural or equivalent process substitution or modification based on the essential concept of this application and using the content recorded in the text and drawings of the specification of this application, as well as any technical solution directly or indirectly implementing the above embodiments in other related technical fields, etc., are all included in the patent protection scope of this application.

Claims

1. A sand and water supply system, characterized in that, Comprising: A circulating sand box (9) for uniformly 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 concentration meter (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 concentration meter (12) respectively; A timer electrically connected to the control device (13) for sending an instruction to the control device (13) at preset intervals to trigger the water supply unit (10) to add water.

2. The sand and water supply system according to claim 1, wherein, The sand supply unit (11) includes a loss-in-weight scale for measuring the sand addition amount.

3. The sand and water supply system according to claim 1, characterized in that, Further comprising: A liquid level sensor (16) located in the circulating sand box (9) and electrically connected to the control device (13) for detecting the liquid level height in the circulating sand box (9).

4. The sand and water supply system according to claim 3, characterized in that, 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, a smart water meter and a pneumatic diaphragm valve electrically connected to the control device, and a make-up water pipe connected to the circulating sand box (9) through the pneumatic diaphragm valve.

5. The sand and water supply system according to claim 1, characterized in that, Further comprising: 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.

6. The sand and water supply system according to claim 1, characterized in that, Further comprising: A counter electrically connected to the timer and the control device (13) respectively for recording the number of times the timer sends an instruction.

7. The sand and water supply system according to claim 1, characterized in that, The concentration meter (12) is a Coriolis flow meter.

8. The sand and water supply system according to claim 1, characterized in that, Further comprising: A sand-water delivery unit (15) including a sand suction water pump (1501) for pumping out the sand-water in the circulating sand box (9) and a sand-water delivery pipeline (1502) connected to the outlet of the sand suction water pump (1501).

9. The sand and water supply system according to claim 1, wherein 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).

10. The sand and water supply system according to claim 9, characterized in that, The bottom surface of the sand box inner cavity (9011) is a conical surface (9011a).

Images