Top-feed negative pressure throwing device and system

Abstract

This utility model relates to the field of material throwing machinery technology, and discloses a top-feed negative pressure material throwing device and system. In this utility model, the material throwing mechanism includes a matched first base plate, a top cover plate with openings, multiple blades, and a motor bushing located at the center of the first base plate; wherein the motor bushing is fixedly connected to the motor shaft; a feeding mechanism is coaxially fitted into the material throwing mechanism, with an open feed port at the top and a discharge port on the lower side wall; a bearing sleeve is also provided inside the feeding mechanism, and the bearing sleeve is connected to the motor shaft through a bearing. The material throwing device and system provided by this utility model can effectively prevent rainwater from entering the motor and feeding pipe, achieve directional material throwing, and can also generate a large negative pressure to directly draw material from the hopper without the need for an additional blower, which helps to reduce system costs.

Description

Technical Field

[0001] This utility model relates to the field of material throwing machinery technology, and in particular to a negative pressure material throwing device and system with top feeding. Background Technology

[0002] Feed feeders are a common type of machinery used in aquaculture to feed animals at set times and in measured quantities. In aquaculture, pneumatic feeders that use wind power to convey feed are a frequently used type of aquaculture machinery. For example... Figure 1 As shown, a typical pneumatic feeder consists of a main unit containing a hopper, a throwing mechanism, and pipes connecting the main unit and the throwing mechanism. The main unit stores feed pellets (i.e., materials), and the throwing mechanism generates negative pressure to extract feed pellets from the hopper of the main unit through the pipes. Centrifugal blades then throw the feed pellets out, achieving 360-degree material delivery. However, because the throwing angle cannot be controlled, it is only suitable for aquaculture farms with large water surfaces; otherwise, feed pellets may be thrown onto the shore, causing losses. Furthermore, because the feed pipe is located below the throwing disc and is directly connected to it, rainwater can easily enter the feed pipe through the throwing disc during strong winds and rainy weather, causing water accumulation in the pipes and even entering the motor shaft, damaging the motor. This significantly and adversely affects the product's applicability and lifespan.

[0003] Due to limitations in the size of the aquaculture pond and its susceptibility to rainwater damage, there is currently another type of feeding device on the market that feeds material from the top of the feeding plate. For example... Figure 2 As shown, the device consists of a motor, a feeding hopper, a feeding disc, and a cover plate. The motor is fixed to the lower part of the feeding hopper, and its shaft passes through an opening in the middle of the feeding hopper, is fixed to the feeding disc, and drives the feeding disc to rotate when the feeding mechanism is working. The upper part of the feeding hopper is covered by a cover plate, with a gap larger than the diameter of the feed particles between the cover plate and the feeding disc. The cover plate has a feed inlet for connecting to a feeding pipe. However, this feeding device, which feeds from the top of the feeding disc, cannot control the feeding angle and may cause the feed particles (i.e., the material) to break. In addition, due to the large gap between the cover plate and the feeding disc, it is impossible to directly suck up the feeding using negative pressure, requiring an additional blower at one end of the feeding hopper, which significantly increases the system cost. Utility Model Content

[0004] The purpose of this utility model is to provide a top-feed negative pressure feeding device and system, which can meet the needs of directional feeding, rainwater prevention, and prevention of feed particle breakage in small-area aquaculture.

[0005] To solve the above-mentioned technical problems, the present invention provides a top-feed negative pressure throwing device and system, comprising:

[0006] An electric motor having a motor shaft;

[0007] The material throwing mechanism includes a first base plate and a top cover plate that are matched together, a plurality of blades located between the first base plate and the top cover plate, and a motor bushing located at the center of the first base plate; wherein the motor bushing is fixedly connected to the motor shaft so that the material throwing mechanism rotates with the motor shaft; the top cover plate has an opening at its center;

[0008] The feeding mechanism is a cylindrical structure with an open feed port at the top and a discharge port on the lower side wall. A bearing sleeve is installed inside the feeding mechanism, and the bearing sleeve is connected to the motor shaft through a bearing so that the feeding mechanism remains stationary when the motor shaft rotates. The outer diameter of the feeding mechanism is smaller than the inner diameter of the opening in the upper cover plate, and it is coaxially fitted into the center of the throwing mechanism.

[0009] Compared with the prior art, the top-feed negative pressure throwing device provided by this utility model has the following advantages. First, due to the top-feed method, after the feed inlet is connected to the feeding pipe, rainwater can be completely prevented from entering the feeding pipe and the throwing mechanism, thus preventing rainwater from entering the motor through the motor shaft. Second, since the feeding mechanism remains stationary when the motor shaft rotates, the position of the discharge port can be adjusted to achieve throwing at any angle within 360 degrees, and multiple discharge angles can also be supported to adapt to various types of aquaculture feeding needs. In addition, the material is directly thrown into the water area from the discharge port under negative pressure, avoiding material loss due to collision and breakage.

[0010] In some embodiments, a gap is left between the outer diameter of the feeding mechanism and the upper cover plate to prevent the feeding mechanism and the throwing mechanism from colliding.

[0011] It is understood that in the top-feed negative pressure throwing device provided in this embodiment of the utility model, since the feeding mechanism remains stationary when the motor shaft rotates, while the throwing mechanism rotates with the motor shaft, and the feeding mechanism is coaxially mounted on the center of the throwing mechanism, a gap needs to be left between the outer diameter of the feeding mechanism and the upper cover plate to prevent the feeding mechanism and the throwing mechanism from colliding and causing damage to the device.

[0012] In some embodiments, the opening in the upper cover plate is a circular opening, the feeding mechanism is a cylindrical structure, and the gap between the outer diameter of the feeding mechanism and the inner diameter of the opening in the upper cover plate does not exceed 4 mm.

[0013] It is understood that in the top-feed negative pressure throwing device provided in this embodiment of the utility model, by controlling the gap between the outer diameter of the feeding mechanism and the inner diameter of the opening of the upper cover plate to within 4mm, it is possible to effectively prevent the feeding mechanism and the throwing mechanism from colliding, and also to ensure that a large negative pressure can be generated in the feeding pipe during operation, so that materials can be directly drawn from the storage bin without the need to add a blower, thereby significantly reducing the system cost.

[0014] In some embodiments, the bottom of the feeding mechanism is higher than the height of the first base plate in the throwing mechanism, and the lower edge of the discharge port is lower than the lower edge of the upper cover plate, so that the material is drawn into the throwing mechanism from the discharge port under the negative pressure generated by the throwing mechanism.

[0015] It is understood that in the top-feed negative pressure throwing device provided in this utility model embodiment, when the height of the second bottom plate in the feeding mechanism is higher than the height of the first bottom plate in the throwing mechanism, and the lower edge of the discharge port is lower than the lower edge of the upper cover plate, a structure similar to a centrifugal fan impeller is formed when the throwing mechanism rotates at high speed, so that air can only enter the throwing mechanism through the feeding port, thereby realizing that under the negative pressure generated by the throwing mechanism, it is sucked into the throwing mechanism from the discharge port.

[0016] In some embodiments, the feeding mechanism further includes a second base plate that is sealed to the cylindrical structure, wherein the lower edge of the discharge port is flush with the second base plate of the feeding mechanism.

[0017] It is understood that in the top-feed negative pressure throwing device provided in this embodiment of the present invention, when the feeding mechanism further includes a second bottom plate sealed to the cylindrical structure, it can prevent particles from leaking from the bottom of the feeding mechanism into the feeding direction that needs to be sealed. Furthermore, when the lower edge of the discharge port is flush with the second bottom plate of the feeding mechanism, it can ensure that the material can be more easily thrown towards the predetermined direction / target water area, preventing material from accumulating inside the feeding mechanism.

[0018] In some embodiments, the number of blades is 4 to 10, and they are perpendicular to the first base plate.

[0019] It is understood that in the top-feed negative pressure throwing device provided in this utility model embodiment, the determination of the number of blades is based on the balance of multiple factors such as throwing demand, power parameters, and material characteristics, so as to minimize energy consumption while ensuring the uniformity and efficiency of throwing.

[0020] In some embodiments, the feed inlet is higher than the upper cover of the throwing mechanism.

[0021] It is understood that in the top-feed negative pressure throwing device provided in this embodiment of the utility model, when the feed inlet is higher than the upper cover plate of the throwing mechanism, it is convenient to seal and fix the feeding pipe on the feed inlet in the future.

[0022] In some embodiments, the inner diameter of the bearing sleeve is larger than the outer diameter of the motor shaft sleeve.

[0023] It is understood that in the top-feed negative pressure throwing device provided in this utility model embodiment, by making the inner diameter of the bearing sleeve larger than the outer diameter of the motor shaft sleeve, it can be ensured that the first base plate of the throwing mechanism and the second base plate of the feeding mechanism are fitted together, and the bearing sleeve and the motor shaft sleeve have a certain gap to ensure that the feeding mechanism and the throwing mechanism do not collide. This allows the feeding mechanism to remain stationary when the throwing mechanism rotates with the motor shaft, so that the angle of the discharge port can be stabilized in a fixed direction. Furthermore, by adjusting the angle of the bottom discharge port, it is possible to throw material from any angle within 360 degrees.

[0024] In some embodiments, the feeding mechanism is provided with at least one discharge port.

[0025] It is understood that in the top-feed negative pressure throwing device provided in this embodiment of the utility model, if multiple discharge ports are provided, materials can be simultaneously thrown in multiple fixed directions.

[0026] Based on the same inventive concept, this utility model embodiment also provides a top-feed negative pressure throwing system, which includes: a storage bin, a top-feed negative pressure throwing device as described in any of the above embodiments, and a feeding pipe connecting the storage bin and the negative pressure throwing device.

[0027] Compared with the prior art, the top-feed negative pressure throwing system provided by this utility model has the following advantages. First, because it adopts a top-feed method, after the feed inlet is connected to the feeding pipe, the port of the feeding pipe faces downward, which can completely prevent rainwater from entering the feeding pipe and the throwing mechanism, thereby preventing rainwater from entering the motor through the motor shaft. Second, since the feeding mechanism remains stationary when the motor shaft rotates, any throwing angle can be achieved by adjusting the position of the discharge port, and multiple discharge angles can also be supported to adapt to various types of aquaculture feeding needs. In addition, the material is thrown directly from the discharge port to the target water area under negative pressure, avoiding material loss due to collision and breakage. Attached Figure Description

[0028] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0029] Figure 1 This is a schematic diagram of the structure of a lower-feed pneumatic feeding mechanism in the prior art;

[0030] Figure 2 This is a schematic diagram of the structure of a top-feed pneumatic feeding mechanism in the prior art;

[0031] Figure 3 This is a schematic diagram of the structure of a top-feed negative pressure throwing device provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of a material throwing mechanism provided in an embodiment of this utility model;

[0033] Figure 5 This is a schematic diagram of the structure of a feeding mechanism provided in an embodiment of this utility model;

[0034] Figure 6 This is a schematic diagram of a top-feed negative pressure throwing system provided in an embodiment of the present invention.

[0035] Explanation of reference numerals: 31-Motor, 32-Throwing mechanism, 321-First base plate, 322-Top cover plate, 323-Blade, 324-Motor bushing, 33-Feeding mechanism, 331-Cylindrical structure, 332-Inlet, 333-Outlet, 334-Second bottom edge, 335-Bearing sleeve, 61-Storage bin, 62-Negative pressure throwing device for top feeding, 63-Feeding pipe. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of the invention. However, the technical solutions claimed in the claims of this utility model can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0037] In this embodiment of the invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0038] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0039] Furthermore, the terms "installation," "setting," "equipped with," "opening," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0040] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0041] The first embodiment of this utility model relates to a top-feed negative pressure feeding device to meet the needs of directional feeding, rainwater prevention, and prevention of feed particle breakage in small-area aquaculture. Please refer to [link to relevant documentation]. Figure 3 , Figure 4 and Figure 5 .like Figure 3 The diagram shows the structure of a top-feed negative pressure throwing device, which includes a motor 31, a throwing mechanism 32, and a feeding mechanism 33. Figure 4 The structure of a material throwing mechanism in this embodiment is shown; Figure 5 The structure of a feeding mechanism in this embodiment is shown.

[0042] The motor 31 has a motor shaft. In practical applications, the motor should be installed on the floating device. Since both the motor and the floating device can be common products on the market, the structure of the floating device and the installation and fixing method of the floating structure and the motor will not be described in detail here.

[0043] The throwing mechanism 32 includes a first base plate 321 and an upper cover plate 322 that are matched together, a plurality of blades 323 located between the first base plate 321 and the upper cover plate 322, and a motor bushing 324 located at the center of the first base plate 321; wherein the motor bushing 324 is fixedly connected to the motor shaft so that the throwing mechanism rotates with the motor shaft; the upper cover plate 322 has an opening at its center. In this embodiment, the motor can drive the throwing mechanism to rotate; the upper part of the throwing mechanism is provided with an upper cover plate 322, which is a disc structure with a central opening. Its function is to allow air to enter the throwing mechanism only through the central opening of the upper cover plate 322. Therefore, when the throwing mechanism rotates at high speed, the throwing mechanism will draw air from the center of the upper cover plate 322 to form a centrifugal fan impeller structure.

[0044] The feeding mechanism 33 is a cylindrical structure 331, i.e., a feeding cylinder, with an open feeding port 332 at the top and a discharge port 333 on the lower side wall. A bearing sleeve 335 is installed inside the feeding mechanism, and the bearing sleeve 335 is connected to the motor shaft via a bearing, so that the feeding mechanism remains stationary when the motor shaft rotates. The outer diameter of the feeding mechanism is smaller than the diameter of the opening in the upper cover plate 322, and it is coaxially fitted into the center of the throwing mechanism. In this embodiment, because the feeding mechanism 33 is coaxially fitted into the center of the throwing mechanism, when the throwing mechanism rotates, it draws in air from the feeding port 332, creating a negative pressure area in the feeding port 332, allowing material to be drawn in through the feeding pipe.

[0045] The top-feed negative pressure throwing device provided by this utility model has the following advantages over the prior art. First, since the feed inlet 332 is located at the top of the feeding mechanism, and the feed pipe faces downwards after the feed inlet 332 is connected to the feed pipe, rainwater can be completely prevented from entering the feed pipe. Furthermore, since the feeding mechanism passes through the opening sleeve of the upper cover plate 322 in the throwing mechanism, only the feed inlet 332 is an upward-facing opening. Therefore, after the feed inlet 332 is connected to the feed pipe, rainwater can be prevented from entering the throwing mechanism, so even rainy days will not affect its use. Second, since the feeding mechanism remains stationary when the motor shaft rotates, the throwing angle can be adjusted within 360 degrees by adjusting the position of the discharge port 333. It can also support simultaneous discharge from multiple discharge angles, adapting to the feeding needs of various types of aquaculture waters. Additionally, the material is directly thrown into the water area from the discharge port 333 under negative pressure, avoiding material breakage due to collision.

[0046] In some embodiments, a gap is left between the outer diameter of the feeding mechanism and the upper cover plate 322 to prevent the feeding mechanism and the throwing mechanism from colliding.

[0047] Please see Figure 3 In the top-feed negative pressure throwing device provided in this embodiment of the utility model, since the feeding mechanism remains stationary when the motor shaft rotates, while the throwing mechanism rotates with the motor shaft, and the feeding mechanism is coaxially mounted on the center of the throwing mechanism, a gap needs to be left between the outer diameter of the feeding mechanism and the upper cover plate 322 to prevent the feeding mechanism and the throwing mechanism from colliding and causing damage to the device.

[0048] In some embodiments, the opening in the upper cover plate 322 is a circular opening, the feeding mechanism is a cylindrical structure 331, and the gap between the outer diameter of the feeding mechanism and the inner diameter of the opening in the upper cover plate 322 does not exceed 4 mm.

[0049] It is understood that in the top-feed negative pressure throwing device provided in this embodiment of the utility model, by controlling the gap between the outer diameter of the feeding mechanism and the inner diameter of the opening of the upper cover plate 322 to within 4mm, it is possible to effectively prevent the feeding mechanism and the throwing mechanism from colliding, and also to ensure that a large negative pressure can be generated in the feeding pipe during operation, so that materials can be directly sucked from the silo without the need for an additional blower, thereby significantly reducing system costs. In practical applications, the gap between the feeding mechanism and the upper cover plate 322 is generally greater than 1mm to ensure that the feeding mechanism and the throwing mechanism will not collide at all during operation. Specifically, the gap range can be set between 1mm and 3mm to improve the material conveying capacity while ensuring that the two do not collide, so that a sufficiently large negative pressure can be generated in the feeding pipe to achieve direct material suction from the storage silo.

[0050] In some embodiments, the feed inlet 332 is higher than the upper cover plate 322 of the throwing mechanism.

[0051] It is understood that in the top-feed negative pressure throwing device provided in this embodiment of the present invention, when the feed inlet 332 is higher than the upper cover plate 322 of the throwing mechanism, it is convenient to subsequently seal and fix the feeding pipe to the feed inlet 332. Furthermore, when the feed inlet 332 is higher than the upper cover plate 322 of the throwing mechanism, it is convenient to seal and connect the feeding pipe to the feed inlet 332 during use; in addition, it can also avoid the risk of friction and collision between the upper cover plate 322 and the feeding pipe caused by the feed inlet 332 being lower than the upper cover plate 322.

[0052] In some embodiments, the bottom of the feeding mechanism is higher than the height of the first base plate 321 in the throwing mechanism, and the lower edge of the discharge port 333 is lower than the lower edge of the upper cover plate 322, so that the material is sucked into the throwing mechanism from the discharge port 333 under the negative pressure generated by the throwing mechanism.

[0053] It is understood that in the top-feed negative pressure throwing device provided in this embodiment of the present invention, when the bottom of the feeding mechanism is higher than the height of the first base plate 321 in the throwing mechanism, and the lower edge of the discharge port 333 is lower than the lower edge of the upper cover plate 322, a structure similar to a centrifugal fan impeller is formed when the throwing mechanism rotates at high speed. This allows air to enter the throwing mechanism only through the feed port 332, thereby achieving the effect of being sucked into the throwing mechanism from the discharge port 333 under the negative pressure generated by the throwing mechanism. It should be noted that in actual design, the gap between the bottom of the feeding mechanism and the first base plate should be kept as small as possible to prevent material particles from leaking from the bottom to the feeding direction that needs to be sealed.

[0054] In some embodiments, the feeding mechanism further includes a second base plate that is sealed to the cylindrical structure, wherein the lower edge of the discharge port 333 is flush with the base plate of the feeding mechanism.

[0055] It is understood that in the top-feed negative pressure throwing device provided in this embodiment of the present invention, when the feeding mechanism further includes a second bottom plate sealed to the cylindrical structure, it can prevent particles from leaking from the bottom of the feeding mechanism to the feeding direction that needs to be sealed. Furthermore, when the lower edge of the discharge port 333 is flush with the bottom plate of the feeding mechanism, it can ensure that the material can be more easily thrown towards the predetermined direction / target area, preventing material from accumulating inside the feeding mechanism.

[0056] In some embodiments, the number of blades 323 is 4 to 10, and they are perpendicular to the first base plate 321.

[0057] It is understandable that the number of blades 323 in a pond feeding device is not arbitrarily set, but determined by comprehensively considering factors such as feeding efficiency, power matching, and water flow characteristics. For example, the number of blades 323 directly affects the uniformity and range of material distribution. If there are too few blades 323, the feeding mechanism will grab and throw less material per revolution, which may lead to concentrated material distribution, local accumulation, and limited coverage. If there are too many blades 323, the gaps between the blades 323 become smaller, making it easier for material to clog between the blades 323, thus reducing feeding efficiency. At the same time, the overlap of blades 323 may increase energy loss. Therefore, the design must consider both the "single-time throwing volume" and the "throwing frequency." In addition, it is also necessary to consider the matching between the number of blades 323 and the power of the drive motor, the material characteristics, and the influence of the shape (e.g., straight plate, curved) and arrangement (e.g., symmetrical, staggered) of the blades 323 on the water flow. Generally, the number of blades 323 is set between 4 and 10 to minimize energy consumption while ensuring feeding uniformity and efficiency. Preferably, 6 to 8 fan blades are used in this embodiment. In addition, the specific number of blades 323 should be further adjusted according to the size of the pond, the power of the motor and the type of material. This utility model does not impose any limitation on the number of blades 323.

[0058] In some embodiments, the inner diameter of the bearing sleeve 335 is larger than the outer diameter of the motor bushing 324.

[0059] It is understood that in the top-feed negative pressure throwing device provided in this utility model embodiment, by making the inner diameter of the bearing sleeve 335 larger than the outer diameter of the motor shaft sleeve 324, it can be ensured that the first base plate 321 of the throwing mechanism and the second base plate 334 of the feeding mechanism are fitted together, and the bearing sleeve 335 and the motor shaft sleeve 324 have a certain gap, ensuring that there is no collision between the feeding mechanism and the throwing mechanism, so that the feeding mechanism can remain stationary when the throwing mechanism rotates with the motor shaft. Therefore, the angle of the discharge port 333 can be stabilized in a fixed direction, and by adjusting the angle of the bottom discharge port 333, directional throwing at any throwing angle within 360 degrees can be achieved.

[0060] In some embodiments, the feeding mechanism is provided with at least one discharge port 333.

[0061] It is understood that in the top-feed negative pressure throwing device provided in this embodiment of the present invention, if multiple discharge ports 333 are provided, materials can be simultaneously fed in multiple directions. This embodiment of the present invention does not limit the number of discharge ports 333, and can be set according to specific needs.

[0062] To explain the solution of this utility model more clearly and intuitively, the following will be combined with... Figures 3-5 The overall structure of the device is described.

[0063] In the top-feed negative pressure throwing device provided in this embodiment of the utility model, such as Figure 4 As shown, in this embodiment, the bottom of the throwing mechanism is a circular first base plate 321. Several blades 323 are arranged around the first base plate 321, radially positioned and perpendicular to it. A motor bushing 324 is located at the center of the first base plate 321, used to fix the throwing mechanism to the motor shaft so that the motor can drive the throwing mechanism to rotate. An upper cover plate 322 is provided on the upper part of the throwing mechanism. The upper cover plate 322 is a disc structure with a central opening. Its function is to allow air to enter the throwing mechanism only through the central opening. Therefore, when the throwing mechanism rotates at high speed, it will draw air from the center of the upper cover plate 322, forming a centrifugal fan impeller structure.

[0064] Correspondingly, such as Figure 4 As shown, the main body of the feeding mechanism is a cylindrical structure 331. Specifically, the cylindrical structure 331 can be a cylindrical feeding cylinder. The diameter / outer diameter of the feeding cylinder is slightly smaller than the diameter of the central opening of the upper cover plate 322 of the throwing mechanism. A gap of 1 to 3 mm or more is usually required between the feeding cylinder and the upper cover plate 322 to prevent the throwing mechanism from contacting the feeding cylinder when it rotates. The bottom of the feeding mechanism is provided with a closed second bottom plate 334, and the upper part is an open feeding port 332. The side plate on the lower side of the feeding cylinder is provided with a discharge port 333. The upper edge of the discharge port 333 needs to be lower than the lower edge of the upper cover plate 322 of the throwing mechanism, while the second bottom plate 334 needs to be higher than the bottom plate of the throwing mechanism. This makes it easier for the feed pellets (materials) to be sucked into the throwing mechanism from the discharge port 333 under the negative pressure generated by the throwing disc after entering from the upper feeding port 332, thus achieving directional delivery.

[0065] In summary, in the top-feed negative pressure throwing device provided by this utility model embodiment, since the feed inlet 332 is located at the top of the feeding mechanism, and the feed pipe faces downwards after the feed inlet 332 is connected to the feeding pipe, rainwater can be completely prevented from entering the feeding pipe and the throwing mechanism, thus preventing rainwater from entering the motor through the motor shaft. Furthermore, since the feeding mechanism passes through the opening sleeve of the upper cover plate 322 within the throwing mechanism, and only the feed inlet 332 is an upward-facing opening, rainwater can be prevented from entering the throwing mechanism after the feed inlet 332 is connected to the feeding pipe, so rainwater will not affect its use even on rainy days. Secondly, since the feeding mechanism remains stationary when the motor shaft rotates, the position of the discharge port 333 can be adjusted to achieve feeding at any angle within 360 degrees, and multiple discharge angles can be supported simultaneously, adapting to various types of aquaculture feeding needs. Additionally, the material is directly thrown into the water area from the discharge port 333 under negative pressure, avoiding material breakage due to collision.

[0066] Based on the same inventive concept, this utility model also provides a top-feed negative pressure throwing system. For example... Figure 6 As shown, the top-feed negative pressure throwing system includes: a storage bin 61, a top-feed negative pressure throwing device 62 in any of the above embodiments, and a feeding pipe 63 connecting the storage bin 61 and the negative pressure throwing device.

[0067] In this embodiment, the structure of the top-feed negative pressure throwing device 62 is as follows: Figures 3 to 5 As shown, the top-feed negative pressure throwing device 62 includes a motor 31, a throwing mechanism 32, and a feeding mechanism 33. The throwing mechanism 32 includes a first base plate 321 and a top cover plate 322 that are matched together, multiple blades 323 located between the first base plate 321 and the top cover plate 322, and a motor bushing 324 located at the center of the first base plate 321. The motor bushing 324 is fixedly connected to the motor shaft so that the throwing mechanism rotates with the motor shaft. The top cover plate 322 has an opening at its center. The feeding mechanism 33 is a cylindrical structure 331, with an open feed port 332 at the top, a discharge port 333 on the lower side wall, and a closed second bottom plate 334 at the bottom. A bearing sleeve 335 is installed inside the feeding mechanism, and the bearing sleeve 335 is connected to the motor shaft through a bearing so that the feeding mechanism remains stationary when the motor shaft rotates. The outer diameter of the feeding mechanism is smaller than the diameter of the opening in the upper cover plate 322, and it is coaxially fitted into the center of the throwing mechanism.

[0068] To prevent collisions between the feeding mechanism and the throwing mechanism, a gap is maintained between the outer diameter of the feeding mechanism and the upper cover plate 322 in this embodiment. To effectively prevent collisions while ensuring sufficient negative pressure in the feeding pipe to directly draw material from the hopper, the gap is typically no more than 4mm. In practical applications, the gap between the feeding mechanism and the upper cover plate 322 is generally greater than 1mm to ensure that they do not collide during operation; for example, the gap can be set between 1mm and 3mm.

[0069] Furthermore, in some embodiments, the bottom of the feeding mechanism is higher than the height of the first bottom plate 321 in the throwing mechanism, and the lower edge of the discharge port 333 is lower than the lower edge of the upper cover plate 322, so that the material is sucked into the throwing mechanism from the discharge port 333 under the negative pressure generated by the throwing mechanism.

[0070] In some embodiments, the feeding mechanism further includes a second bottom plate that is sealed to the cylindrical structure, wherein the lower edge of the discharge port 333 is flush with the second bottom plate of the feeding mechanism. When the feeding mechanism includes a second bottom plate that is sealed to the cylindrical structure, it can prevent particles from leaking from the bottom of the feeding mechanism to the feeding direction that needs to be sealed, and ensure that the material can be more easily thrown to the predetermined direction / target water area, preventing accumulation in the feeding mechanism.

[0071] In some embodiments, considering factors such as material throwing requirements, power parameters, and material characteristics, and in order to balance material throwing uniformity and efficiency as well as minimize energy consumption, the number of blades 323 is 4 to 10, and they are perpendicular to the first base. The shape of the blades 323 can be rectangular or fan-shaped, etc., without any limitation, and can be designed according to actual applications.

[0072] In some embodiments, the feeding mechanism is provided with at least one discharge port 333. It is understood that if multiple discharge ports 333 are provided, materials can be fed simultaneously in multiple directions. The number of discharge ports 333 is not limited here and can be set according to specific needs.

[0073] In summary, the top-feed negative pressure throwing system provided by this utility model has the following advantages over the prior art. First, because it adopts a top-feed method, after the feed inlet is connected to the feeding pipe, the port of the feeding pipe faces downwards, which can completely prevent rainwater from entering the feeding pipe and the throwing mechanism, thereby preventing rainwater from entering the motor through the motor shaft. Second, since the feeding mechanism remains stationary when the motor shaft rotates, any throwing angle can be achieved by adjusting the position of the discharge port, and multiple discharge angles can be supported to adapt to various types of aquaculture feeding needs. In addition, the material is directly thrown into the target water area from the discharge port under the generated sufficiently large negative pressure, avoiding material breakage due to collision and eliminating the need for an additional blower, which helps to further reduce system costs.

[0074] The "subject name" provided by the embodiments of this utility model has been described in detail above. Specific examples have been used in this document to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the idea of ​​this utility model. There may be changes in the specific implementation and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A top-feed negative pressure throwing device, characterized in that, include: An electric motor having a motor shaft; The material throwing mechanism includes a first base plate and a top cover plate that are matched together, a plurality of blades located between the first base plate and the top cover plate, and a motor bushing located at the center of the first base plate; The motor bushing is fixedly connected to the motor shaft so that the throwing mechanism rotates with the motor shaft; the upper cover plate has an opening at its center; The feeding mechanism is a cylindrical structure with an open feed port at the top and a discharge port on the lower side wall. A bearing sleeve is installed inside the feeding mechanism, and the bearing sleeve is connected to the motor shaft through a bearing so that the feeding mechanism remains stationary when the motor shaft rotates. The outer diameter of the feeding mechanism is smaller than the inner diameter of the opening in the upper cover plate, and it is coaxially fitted into the center of the throwing mechanism.

2. The top-feed negative pressure throwing device according to claim 1, characterized in that, A gap is left between the outer diameter of the feeding mechanism and the upper cover plate to prevent the feeding mechanism and the throwing mechanism from colliding.

3. The top-feed negative pressure throwing device according to claim 2, characterized in that, The opening in the upper cover plate is a circular opening, the feeding mechanism is a cylindrical structure, and the gap between the outer diameter of the feeding mechanism and the inner diameter of the opening in the upper cover plate does not exceed 4mm.

4. The top-feed negative pressure throwing device according to claim 1, characterized in that, The bottom of the feeding mechanism is higher than the height of the first base plate in the throwing mechanism, and the lower edge of the discharge port is lower than the lower edge of the upper cover plate, so that the material is sucked from the discharge port into the throwing mechanism under the negative pressure generated by the throwing mechanism.

5. The top-feed negative pressure throwing device according to claim 1, characterized in that, The feeding mechanism also includes a second base plate that is sealed to the cylindrical structure, wherein the lower edge of the discharge port is flush with the second base plate in the feeding mechanism.

6. The top-feed negative pressure throwing device according to claim 1, characterized in that, The number of blades is 4 to 10, and they are perpendicular to the first base plate.

7. The top-feed negative pressure throwing device according to claim 1, characterized in that, The feed inlet is higher than the upper cover plate of the throwing mechanism.

8. The top-feed negative pressure throwing device according to claim 1, characterized in that, The inner diameter of the bearing sleeve is larger than the outer diameter of the motor shaft sleeve.

9. The top-feed negative pressure throwing device according to claim 1, characterized in that, The feeding mechanism is provided with at least one discharge port.

10. A top-feed negative pressure throwing system, characterized in that, include: The material storage bin, the top-feed negative pressure throwing device as described in any one of claims 1 to 9, and the feeding pipe connecting the material storage bin and the negative pressure throwing device.

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