Sputter deposition apparatus

Abstract

The application relates to a filtering device for metal collection, in particular to a drum-type metal deposition device for noble metals, which comprises a supporting support, a driving mechanism is fixed on the supporting support; a drum support is rollingly connected to the upper side of the supporting support and is connected to the driving mechanism; the driving mechanism is arranged to drive the drum support to reciprocating swing; at least one medium transmission plate is arranged in an inclined mode; at least a plurality of baffles are arranged on each medium transmission plate; the baffle and the medium transmission plate enclose a plurality of deposition areas; wherein the solid-liquid mixed fluid can flow along the medium transmission plate and make the target solid deposit at the deposition area.

Description

Technical Field

[0001] This application relates to a coarse filtration device for metal collection, specifically a pulsating metal deposition device for precious metals. Background Technology

[0002] Currently, metal collection equipment on the market, especially coarse filtration equipment for precious metals, often suffers from excessive weight and complexity. This not only increases the difficulty of operation but also seriously affects the reliability and durability of the equipment.

[0003] Specifically, the simplicity and stability of equipment are crucial in the operating environment. Many existing precious metal recycling equipment typically employ complex mechanical structures or production lines. The heavy equipment increases the difficulty of transportation, making mobile operations particularly challenging. Moreover, over long-term use, the complex structure can lead to more potential points of failure, making maintenance and upkeep extremely difficult. Especially in some usage scenarios where local professional maintenance personnel and tools are scarce, timely and effective repairs are often difficult to obtain once equipment malfunctions.

[0004] In addition, the high cost of precious metal recycling equipment is also a significant issue. While some advanced equipment can achieve efficient metal recycling, it is not suitable for many small businesses or individual operators. Especially for field operations, low-cost equipment is often more suitable for practical needs, as high costs not only increase investment pressure but also limit the widespread adoption and application of such equipment. Therefore, it is crucial to develop a low-cost, highly reliable precious metal recycling system to address these problems.

[0005] Therefore, this application is submitted. Summary of the Invention

[0006] Addressing the technical challenges of heavy, complex, costly, and difficult equipment in metal extraction operations, this application proposes an innovative pulsating metal deposition device. This device aims to achieve volume reduction, lower equipment costs, simplified processing, and reduced maintenance difficulty, thereby meeting the demands for efficient, economical, and reliable metal recovery in operational environments.

[0007] The first aspect of this application provides a pulsating metal deposition apparatus, comprising: a support bracket, on which a drive mechanism is fixed; a pulsating frame, which is placed on the upper side of the support bracket and connected to the drive mechanism, the drive mechanism being configured to drive the pulsating frame to reciprocate; at least one medium transfer plate, the medium transfer plate being inclined, and at least a plurality of baffles being provided on each medium transfer plate, the baffles and the medium transfer plate enclosing a plurality of deposition areas; wherein, a solid-liquid mixed fluid can flow along the medium transfer plate, causing the target solid to be deposited at the deposition area.

[0008] In this embodiment of the application, the support bracket includes a support frame, a receiving space is formed within the support frame, and the drive mechanism is placed inside the receiving space and fixedly connected to the support frame.

[0009] In this embodiment, the bottom of the pulsating frame is provided with multiple rollers, and the support frame is provided with a corresponding sliding groove structure. The pulsating frame is slidably connected to the sliding groove structure through the rollers; the driving mechanism drives the pulsating frame to reciprocate along its length direction.

[0010] In this embodiment of the application, limit portions are provided at both ends of the chute to constrain the sliding path of the roller.

[0011] In this embodiment, the pulsating frame includes a first support, the first support includes a first bearing part and a first placement part, a roller is disposed at the first bearing part, and the first placement part is inclined at a first angle relative to the horizontal plane; the medium transmission plate is one piece and is placed in the first placement part.

[0012] In this embodiment, the pulsating frame includes a first support and a second support; the first support includes a first bearing portion and a first placement portion, with rollers disposed on the first bearing portion, and the first placement portion inclined at a first angle relative to the horizontal plane; the second support includes a second bearing portion and a second placement portion, the second bearing portion being connected to the first bearing portion, the second placement portion being inclined at a second angle relative to the horizontal plane and having a height difference relative to the first placement portion; there are two media transmission plates, one disposed on the first placement portion and the other disposed on the second placement portion.

[0013] In this embodiment of the application, the second angle is greater than the first angle.

[0014] In this embodiment of the application, a collector plate is provided at the end of the first bracket; wherein the collector plate is connected to the medium transmission plate on the first placement part, and a plurality of diversion grooves are provided at the collector plate.

[0015] In this embodiment, the medium transfer plate includes a bottom plate and a side plate, which together form a flow channel; a baffle is disposed within the flow channel.

[0016] In this embodiment, the baffle is a straight plate or a curved plate, and the height h1 of the baffle does not exceed 50% of the height h2 of the side plate; and / or the baffle is provided with a plurality of through holes.

[0017] Compared with the prior art, the beneficial effects of this application are as follows:

[0018] The present application provides a pulsating metal deposition apparatus with an inclined medium transfer plate to facilitate the natural flow of the solid-liquid mixture without the need for additional power or pumping equipment. Baffles on the medium transfer plate enclose and form a deposition area. The reciprocating oscillation of the pulsating frame generates a strong agitation effect on the solid-liquid mixture. The inclination angle of the medium transfer plate, the configuration of the baffles, and the agitation effect of the pulsating frame together produce a hydrodynamic effect. Due to the differences in the mass and density of the solids, the solid particles inside the fluid undergo relative motion during the deposition process, and the particles with larger mass and density gradually deposit in the deposition area. As the deposition process proceeds, the number of solid particles in the deposition area gradually increases, forming a metal deposition layer.

[0019] This application achieves efficient and uniform deposition of the target solid in the deposition zone through a simple structural design and working principle. It has the advantages of simple structure, convenient operation, and good deposition effect, and is suitable for various metal deposition processes, such as gold panning. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 A schematic diagram of the structure of the pulsating metal deposition apparatus provided in the embodiments of this application, viewed from the bearing.

[0022] Figure 2 A front view of the pulsating metal deposition apparatus provided in the embodiments of this application;

[0023] Figure 3 A side view of the pulsating metal deposition apparatus provided in the embodiments of this application;

[0024] Figure 4 This is another form of the pulsating metal deposition apparatus provided in the embodiments of this application;

[0025] Figure 5 This is a schematic diagram of the structure of the dielectric transfer plate in the pulsating metal deposition apparatus provided in the embodiments of this application;

[0026] Figure 6 This is a schematic diagram of the structure of the pulsating frame in the pulsating metal deposition apparatus provided in the embodiments of this application. Detailed Implementation

[0027] In the description of this application, it should be understood that the use of terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" to indicate orientation or positional relationship, unless otherwise specified, is understood to be based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] Furthermore, features specified with "first" or "second" for descriptive purposes only should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features specified with "first" or "second" may explicitly or implicitly include at least one of the specified features. The description of "multiple" generally means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this application, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0032] Please seeFigures 1 to 6 This application provides a pulsating metal deposition apparatus 100, which includes a support bracket 10, a pulsating frame 20, and at least one medium transfer plate 30.

[0033] Based on this concept, a drive mechanism 40 is fixed on the support bracket 10; the agitator 20 is located on the upper side of the support bracket 10 and connected to the drive mechanism 40, and the drive mechanism 40 is configured to drive the agitator 20 to reciprocate; the medium transfer plate 30 is inclined, and at least a number of baffles 31 are provided on each medium transfer plate 30, and the baffles 31 and the medium transfer plate 30 enclose a number of deposition areas a; wherein, the solid-liquid mixed fluid can flow along the medium transfer plate 30, and the target solid is deposited at the deposition area a.

[0034] In this application, the support bracket 10 is the main structure of the equipment, used to support and fix other components, providing a stable support foundation and ensuring the stability of the entire equipment. The agitator 20 is rotatably connected to the upper side of the support bracket 10 and connected to the drive mechanism 40. Driven by the drive mechanism 40, the agitator 20 can reciprocate, thereby agitating or influencing the flow state of the solid-liquid mixture, which helps the target solid to be deposited in the deposition area a. Furthermore, the drive mechanism 40 is fixed to the support bracket 10 and connected to the agitator 20, providing power so that the agitator 20 can move in a predetermined manner (such as reciprocating oscillation).

[0035] The medium transfer plate 30 is inclined to guide the flow of the solid-liquid mixture; at least a number of baffles 31 are provided on each medium transfer plate 30, and the baffles 31 and the medium transfer plate 30 enclose a number of deposition areas a; the solid-liquid mixture can flow along the medium transfer plate 30, and when the fluid flows through the deposition area a, the target solid is deposited at the deposition area a due to the obstruction of the baffles 31 and the stirring action of the agitator 20.

[0036] In use, the solid-liquid mixture is introduced onto the medium transfer plate 30 and flows along its inclined surface. Due to the presence of the baffle 31, the fluid is divided into multiple channels, forming eddies or turbulence in the deposition area a. Simultaneously, the drive mechanism 40 drives the agitator 20 to reciprocate, further agitating the fluid and enhancing the deposition effect of the target solid in the deposition area a. With the agitation of the agitator 20, the deposition efficiency and uniformity of the target solid in the deposition area a are improved. The design of the baffle 31 can be adjusted according to actual needs to adapt to different deposition requirements and process parameters.

[0037] In summary, the present application provides a pulsating metal deposition apparatus 100. The media transfer plate 30 is inclined, facilitating the natural flow of the solid-liquid mixture without requiring additional power or pumping equipment. Baffles 31 enclose the deposition area a on the media transfer plate 30. The reciprocating oscillation of the pulsating frame 20 strongly agitates the solid-liquid mixture. The inclination angle of the media transfer plate 30, the configuration of the baffles 31, and the agitation of the pulsating frame collectively generate a hydrodynamic effect. Due to differences in solid mass and density, solid particles within the fluid undergo relative motion during deposition, with larger particles gradually depositing in deposition area a. As deposition progresses, the number of solid particles in deposition area a gradually increases, forming a metal deposition layer. Through a simple structural design and working principle, efficient and uniform deposition of the target solid in deposition area a is achieved. It has the advantages of simple structure, convenient operation, and good deposition effect, and is suitable for various metal deposition processes, such as gold panning.

[0038] In this embodiment, the support bracket 10 includes a support frame 11, a receiving space A is formed inside the support frame 11, and the drive mechanism 40 is placed inside the receiving space A and fixedly connected to the support frame 11.

[0039] The support frame 11 is the main body of the support bracket 10, forming a receiving space A. This space is used to accommodate and secure other key components, such as the drive mechanism 40.

[0040] The shape and size of the support frame 11 can be adjusted according to the specific needs of the equipment to adapt to different working environments and process requirements;

[0041] The drive mechanism 40 is the power source of the metal deposition equipment 100. It is responsible for driving the drum frame 20 to reciprocate. The drive mechanism 40 is firmly fixed to the support frame 11 by appropriate fixing devices (such as bolts, nuts, brackets or welding) to ensure its stability and reliability during operation. The type and specifications of the drive mechanism 40 can be selected according to the specific needs of the equipment, such as motor, hydraulic cylinder or pneumatic device.

[0042] In one example, the drive mechanism 40 includes a drive motor, a crankshaft, and a belt. A pulley (also called a pulley) is located at one end or a specific position on the crankshaft. The belt is wound between the pulley on the crankshaft and another fixed or movable pulley. When the crankshaft rotates, the pulley on it also rotates. Because the belt is tightly wound between the two pulleys, the rotation of the belt causes the other pulley (and its connected components) to oscillate. The amplitude, frequency, and speed of the oscillation can be controlled by adjusting parameters such as the diameter of the pulley, the length of the belt, and the rotational speed of the crankshaft.

[0043] In this embodiment, the bottom of the drum frame 20 is provided with a plurality of rollers 21, and the support frame 11 is provided with a corresponding slide groove structure 111. The drum frame 20 is slidably connected to the slide groove structure 111 through the rollers 21. The drive mechanism 40 drives the drum frame 20 to reciprocate along its length direction.

[0044] The length and shape of the chute structure 111 can be designed according to the swing range and requirements of the drum frame 20 to ensure that it can meet the operating requirements of the equipment. The drum frame 20 is slidably connected to the chute structure 111 through the roller 21, which restricts the degree of freedom of the drum frame 20, so that it can move smoothly on the support frame 11, while reducing friction and wear, and improving the durability and stability of the equipment.

[0045] In this embodiment, the two ends of the chute structure 111 are provided with limiting parts c to constrain the sliding path of the rollers. The limiting parts c are designed as protrusions or baffles that contact the rollers 21. When the rollers 21 slide to the end of the chute structure 111, they will contact the limiting parts c and be obstructed, thereby preventing the drum frame 20 from continuing to move forward or backward. The limiting parts c can also provide a stable stopping point so that the drum frame 20 can stop smoothly when it swings to the end, reducing the impact and vibration during transportation.

[0046] One embodiment of this application is as follows: Figure 4 The agitator 20 includes a first support 22, which includes a first bearing portion 221 and a first placement portion 222. A roller 21 is disposed at the first bearing portion 221, and the first placement portion 221 is inclined at a first angle u1 relative to the horizontal plane. The medium transmission plate 30 is a single piece and is placed in the first placement portion 222.

[0047] The bottom of the first bearing part 221 is provided with a position for the roller 21; the roller 21 is fixed on the first bearing part 221 by a suitable connecting device (such as a bearing, bolt or bracket, etc.) so as to slide in the slide groove structure 111.

[0048] The first placement part 222 is the support for placing and fixing the medium transfer plate 30, and it is inclined at a first angle u1 relative to the horizontal plane. The size of the first angle u1 needs to be precisely calculated and adjusted according to the specific deposition requirements and process parameters to ensure that the medium transfer plate 30 can guide the fluid to flow in the best way and promote the deposition of the target solid.

[0049] Correspondingly, there is one medium transfer plate 30, which is placed on the first placement part 222. When the metal deposition equipment 100 is working, the solid-liquid mixed fluid is introduced into the medium transfer plate 30 and flows naturally along its inclined surface. Since the first placement part 222 is inclined at a first angle u1 relative to the horizontal plane, the fluid is subjected to the combined action of gravity and flow inertia on the medium transfer plate 30 and flows at a specific speed and direction.

[0050] Meanwhile, the drive mechanism 40 drives the drum frame 20 to oscillate back and forth along its length. Through the sliding connection of the roller 21 in the chute structure 111, a strong stirring effect is achieved on the solid-liquid mixture. The stirring effect, together with the tilt angle of the medium transfer plate 30, the configuration of the baffle 31, and the different solid mass and density, causes the target solid to separate from the fluid and be deposited in the deposition area a.

[0051] In another embodiment, the pulsating frame 20 includes a first support 22 and a second support 23;

[0052] Correspondingly, the first support 22 includes a first bearing portion 221 and a first placement portion 222, with a roller disposed on the first bearing portion 221, and the first placement portion 222 is inclined at a first angle u1 relative to the horizontal plane; the second support 23 includes a second bearing portion 231 and a second placement portion 232, with the second bearing portion 231 connected to the first bearing portion 221, and the second placement portion 232 is inclined at a second angle u2 relative to the horizontal plane and has a height difference relative to the first placement portion 221; wherein, there are two media transmission plates 30, one of which is disposed on the first placement portion 222 and the other is disposed on the second placement portion 232.

[0053] When the metal deposition equipment 100 is in operation, the solid-liquid mixture is sequentially introduced onto the medium transfer plates 30 on the first support 22 and the second support 23, respectively, and flows naturally along their inclined surfaces. Since the first placement part 222 and the second placement part 232 are inclined at a first angle u1 and a second angle u2 relative to the horizontal plane, respectively, and there is a height difference between them, the fluid is subjected to different gravitational forces and flow inertia on the two medium transfer plates 30, flowing at specific speeds and directions. Simultaneously, the drive mechanism 40 drives the agitator 20 to reciprocate along its length, and through the sliding connection of the rollers 21 in the chute structure 111, a strong agitation effect is achieved on the solid-liquid mixture.

[0054] In this embodiment, the second angle u2 is greater than the first angle u1. When the fluid medium flows from the second placement part 222 (with a larger inclination angle) to the first placement part 221 (with a smaller inclination angle), due to gravity, the target solid particles with larger mass are more likely to deposit during the flow. This design helps to accelerate the flow of the fluid medium and improve the deposition efficiency of target solids, such as gold particles, thereby increasing gold mining output. Furthermore, the difference in inclination angle can affect the deposition rate and position of solid particles in the fluid medium. The design that the second angle u2 is greater than the first angle u1 ensures that the fluid medium gradually slows down during the flow, allowing solid particles sufficient time to deposit on the medium transfer plate 30 on the first placement part 221.

[0055] In one extended example of this application, a flow collector 24 is provided at the end of the first support 22; wherein the flow collector 24 is connected to the medium transfer plate 30 on the first placement part 221, and a plurality of flow dividers 241 are provided at the flow collector 24; the flow dividers 241 are generally designed as grooves or channels to disperse or guide the collected fluid to different directions for better collection.

[0056] In this embodiment, the medium transfer plate 30 includes a bottom plate 32 and a side plate 33, which together form a flow channel d; a baffle 31 is disposed within the flow channel d.

[0057] The side plate 33 and the bottom plate 32 enclose each other to form a flow channel d. The side plate 33 is usually designed as an upright structure perpendicular to the bottom plate 32 to ensure that the fluid can flow stably in the flow channel d.

[0058] The height, width, and shape of the side plate 33 can be customized according to the specific requirements and process parameters of the equipment; for example, the size and shape of the side plate 33 can be designed according to the flow rate, velocity, and deposition requirements of the fluid.

[0059] The flow channel d is a space enclosed by the bottom plate 32 and the side plate 33, which is used to contain and guide the flow of the solid-liquid mixture.

[0060] When the metal deposition apparatus 100 is in operation, a solid-liquid mixture is introduced into the flow channel d of the medium transfer plate 30. Guided by the base plate 32 and side plates 33, the fluid flows in a specific direction. Simultaneously, baffles 31 obstruct the solids in the fluid, causing the target solids in the fluid to gradually deposit on the base plate 32 at the baffles 31 during the flow process.

[0061] In this embodiment, the baffle is a straight plate or a curved plate, and the height h1 of the baffle does not exceed 50% of the height h2 of the side plate; and / or the baffle 31 is provided with a plurality of through holes.

[0062] It is understood that the height h1 of the baffle 31 should not exceed 50% of the height h2 of the side plate 33, in order to avoid the baffle 31 becoming a significant obstacle to fluid flow, thereby ensuring the continuity and stability of the deposition process.

[0063] In some cases, to further optimize the flow and deposition of fluid, several through holes can be provided on the baffle 31. These through holes allow some fluid to pass through the baffle 31, thereby preventing excessive fluid from depositing at the baffle 31. By adjusting the number, size and position of the through holes, fine control of fluid flow can be achieved, further improving deposition efficiency and deposition quality.

[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pulsating metal deposition apparatus, characterized in that, include: A support bracket, on which a drive mechanism is fixed; A drum frame is rotatably connected to the upper side of the support bracket and to the drive mechanism, which is configured to drive the drum frame to reciprocate. At least one medium transfer plate is provided, the medium transfer plate is inclined, and at least a plurality of baffles are provided on each medium transfer plate, the baffles and the medium transfer plate enclosing a plurality of deposition areas; The solid-liquid mixture can flow along the medium transport plate, causing the target solid to be deposited in the deposition area.

2. The metal deposition apparatus according to claim 1, characterized in that, The support bracket includes a support frame, within which a receiving space is formed. The drive mechanism is placed inside the receiving space and is fixedly connected to the support frame.

3. The metal deposition apparatus according to claim 2, characterized in that, The bottom of the pulsating frame is provided with multiple rollers, and the support frame is provided with a corresponding sliding groove structure. The pulsating frame is slidably connected to the sliding groove structure through the rollers. The drive mechanism drives the drum frame to reciprocate along its length.

4. The metal deposition apparatus according to claim 3, characterized in that, The sliding groove structure has limit parts at both ends to constrain the sliding path of the roller.

5. The metal deposition apparatus according to claim 3, characterized in that, The pulsating frame includes a first support, the first support includes a first bearing part and a first placement part, the roller is disposed at the first bearing part, and the first placement part is inclined at a first angle relative to the horizontal plane; The medium transmission board is a single piece and is placed in the first placement section.

6. The metal deposition apparatus according to claim 3, characterized in that, The pulsating frame includes a first support and a second support; The first support includes a first bearing part and a first placement part, the roller is disposed at the first bearing part, and the first placement part is inclined at a first angle relative to the horizontal plane; The second support includes a second bearing part and a second placement part. The second bearing part is connected to the first bearing part, and the second placement part is inclined at a second angle relative to the horizontal plane and has a height difference relative to the first placement part. The media transmission board consists of two pieces, one of which is disposed on the first placement part and the other is disposed on the second placement part.

7. The metal deposition apparatus according to claim 6, characterized in that, The second angle is greater than the first angle.

8. The metal deposition apparatus according to claim 5, characterized in that, The first bracket has a collector plate at its end; wherein the collector plate is connected to the medium transmission plate on the first placement part, and multiple diversion slots are provided at the collector plate.

9. The metal deposition apparatus according to any one of claims 1 to 8, characterized in that, The medium transfer plate includes a bottom plate and a side plate, which together form a flow channel. The baffle is disposed within the flow channel.

10. The metal deposition apparatus according to any one of claims 1 to 8, characterized in that, The baffle is a straight plate or a curved plate, and the height h1 of the baffle does not exceed 50% of the height h2 of the side plate; and / or The baffle is provided with several through holes.

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