An apparatus for injecting a pellet feed into a hydrodynamic conveying pipe system

Abstract

The application provides a device for injecting granular feed into a hydraulic conveying pipeline, comprising a stator shell and a rotor assembly; the rotor assembly is rotatably assembled in the stator shell, the rotor assembly is provided with three accommodating cavities, three groups of inlet and outlet groups are arranged on the stator shell, and the three groups of inlet and outlet groups are a feed filling group, a feed discharging group and a water discharging group in sequence along the rotating direction of the rotor assembly; the three accommodating cavities correspond to the three groups of inlet and outlet groups respectively when the rotor assembly rotates by 120°, the feed filling group is used for filling feed into the accommodating cavities communicated with the feed filling group; the feed discharging group is used for being connected with the hydraulic conveying pipeline, and the feed in the accommodating cavities is discharged into the hydraulic conveying pipeline by injecting water into the accommodating cavities communicated with the feed discharging group; and the water discharging group is used for discharging the water remaining in the accommodating cavities. In this way, the feed can be rapidly and low-loss discharged into the hydraulic conveying pipeline.

Description

Technical Field

[0001] This invention relates to the field of fishery facilities, and more specifically to a device for injecting pellet feed into a hydraulic conveying pipeline system. Background Technology

[0002] In fishery facilities, to reduce feed breakage during transport, lower energy consumption, and enable long-distance feed delivery, hydraulic feed conveying has become the development direction for feeding equipment. Among these technologies, injecting feed into the hydraulic conveying pipeline system is a key technological challenge. How to inject feed into the hydraulic conveying pipeline system with low loss and rapid delivery is a problem that needs to be overcome. Summary of the Invention

[0003] To address the aforementioned problems, the present invention provides a device for injecting pelleted feed into a hydraulic conveying pipeline system.

[0004] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0005] A device for injecting pelleted feed into a hydraulic conveying pipeline system includes a stator housing and a rotor assembly. The rotor assembly is rotatably mounted within the stator housing and has three receiving cavities evenly distributed along its circumference. The stator housing has three sets of inlet / outlet groups evenly distributed along its circumference, and in sequence along the rotation direction of the rotor assembly: a feed filling group, a feed discharging group, and a water draining group. Each 120° rotation of the rotor assembly causes the three receiving cavities to correspond to the three sets of inlet / outlet groups. The feed filling group is used to fill feed into the connected receiving cavity. The feed discharging group is connected to the hydraulic conveying pipeline system and discharges the feed from the connected receiving cavity into the hydraulic conveying pipeline system by injecting water into it. The water draining group discharges water remaining in the receiving cavities.

[0006] Furthermore, each of the three receiving cavities has an upper opening and a lower opening; the receiving cavities are equipped with filter screens with mesh sizes smaller than the diameter of the pellet feed.

[0007] Furthermore, the feed filling assembly includes a feed inlet located above the stator housing and a lower outlet located below the feed inlet. When the rotor assembly rotates to one of the receiving cavities corresponding to the feed filling assembly, the feed inlet connects to the upper opening of the receiving cavity, and the lower outlet connects to the lower opening of the receiving cavity. The stator housing is equipped with a feeding hopper connected to the feed inlet.

[0008] Furthermore, the feed discharge assembly includes a feed outlet located above the stator housing and a water inlet located below the feed outlet. When the rotor assembly rotates to one of the receiving cavities corresponding to the feed discharge assembly, the feed outlet connects to the upper opening of the receiving cavity, and the water inlet connects to the lower opening of the receiving cavity. The stator housing is equipped with a water inlet pipe connected to the water inlet and a discharge pipe connected to the feed outlet. The discharge pipe is used to connect to an external hydraulic conveying system. The water inlet pipe is used to connect to a water pump.

[0009] Furthermore, the rotor assembly is provided with an auxiliary channel, and the stator housing is provided with an auxiliary water inlet and an auxiliary water outlet. When the rotor assembly rotates to the point where the receiving cavity is misaligned with the inlet and outlet assembly, the auxiliary water inlet and the auxiliary water outlet are connected to the auxiliary channel of the rotor assembly. The auxiliary water inlet and the connecting water inlet share the same water inlet pipe.

[0010] Furthermore, the auxiliary water outlet is connected to the auxiliary water outlet pipe, and the auxiliary water outlet pipe is connected to the discharge pipe.

[0011] Furthermore, the drain assembly includes a vent above the stator housing and a drain below the vent. When the rotor assembly rotates to one of the receiving cavities corresponding to the drain assembly, the vent connects to the upper opening of the receiving cavity, and the drain connects to the lower opening of the receiving cavity.

[0012] Furthermore, the stator housing includes a cylindrical outer shell, an upper bushing, a lower bushing, an upper cover plate, and a lower cover plate; the upper bushing and the lower bushing are respectively fixed at the upper and lower ends of the inner cavity of the outer shell, the rotor assembly is assembled inside the upper bushing and the lower bushing, the upper cover plate covers the end opening of the upper bushing, and the lower cover plate covers the end opening of the lower bushing; the upper end of the rotor assembly is rotatably fitted with the upper cover plate through a bearing, and the lower end of the rotor assembly is rotatably fitted with the lower cover plate through a bearing.

[0013] Furthermore, the three accommodating cavities of the rotor assembly are all vertical cavities, and each has an upper opening and a lower opening; the rotor assembly is equipped with sealing rings on the upper and lower sides of the upper opening and the upper and lower sides of the lower opening, and the sealing rings form an incomplete sealing fit with the stator housing; the stator housing is provided with a first water leakage port on the upper and lower sides of the upper opening of the accommodating cavity and the upper and lower sides of the lower opening of the accommodating cavity.

[0014] Furthermore, the stator housing has a second drain outlet at the same level as the lower opening of the receiving cavity, and the second drain outlet is located between the feed discharge group and the feed filling group, as well as between the feed discharge group and the drain group; the stator housing has a third drain outlet at the same level as the upper opening of the receiving cavity, and the third drain outlet is located between the feed discharge group and the feed filling group, as well as between the feed discharge group and the drain group.

[0015] The technical solution provided by this invention has the following beneficial effects:

[0016] The stator housing and rotor assembly are designed with a coordinated structure. Each 120° rotation of the rotor assembly corresponds to one of three inlet / outlet groups in each of the three receiving chambers, enabling simultaneous feed loading, water injection / discharge, and water drainage. This achieves rapid injection into the hydraulic conveying system, resulting in high feed supply efficiency. Furthermore, the use of water injection to discharge the feed simultaneously minimizes feed loss. The device provided in this application features a simple structural design and excellent feed supply performance. Attached Figure Description

[0017] Figure 1 The figure shown is a three-dimensional structural schematic diagram of the device for injecting pellet feed into the hydraulic conveying pipeline system in the embodiment.

[0018] Figure 2 The image shown is a top view of the device for injecting pelleted feed into the hydraulic conveying pipeline system in the embodiment.

[0019] Figure 3 As shown Figure 2 Sectional view of line AA in the middle;

[0020] Figure 4 As shown Figure 2 Sectional view of the middle BB line;

[0021] Figure 5 As shown Figure 2 A cross-sectional view of the CC line;

[0022] Figure 6 The image shown is a side view of the device for injecting pellet feed into the hydraulic conveying pipeline system in the embodiment.

[0023] Figure 7 As shown Figure 6 Sectional view of the DD line;

[0024] Figure 8 As shown Figure 6 Sectional view of the middle EE line;

[0025] Figure 9 As shown Figure 6 Sectional view of the middle FF line;

[0026] Figure 10 As shown Figure 9 A schematic diagram of the rotor assembly rotating to another state in the structure shown;

[0027] Figure 11 The diagram shown is a schematic of the rotor assembly that injects pellet feed into the hydraulic conveying pipeline system in the embodiment.

[0028] Figure 12 The diagram shown is a structural schematic of the lower cover plate in the embodiment. Detailed Implementation

[0029] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0030] In the description of this invention, terms such as "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do 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. Therefore, they should not be construed as limitations on this invention.

[0031] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0032] Reference Figures 1 to 12 As shown, this embodiment provides a device for injecting pelleted feed into a hydraulic conveying pipeline system, including a stator housing 100 and a rotor assembly 200. The rotor assembly 200 is rotatably mounted within the stator housing 100. The rotor assembly 200 has three receiving cavities 201, which are evenly distributed along the circumferential direction of the rotor assembly 200. The stator housing 100 has three sets of inlet and outlet groups, which are evenly distributed along the circumferential direction of the stator housing 100 and, along the rotation direction of the rotor assembly 200, are sequentially a feed filling group, a feed discharging group, and a water discharge group. Every 120° rotation of the rotor assembly 200 causes the three receiving cavities 201 to correspond to the three sets of inlet and outlet groups, respectively as shown below. Figures 3 to 5 As shown, where, Figure 3 One of the receiving cavities 201 corresponds to a feed filling group, which is used to fill feed into the receiving cavity 201 that is connected to it; Figure 4 Another receiving cavity 201 corresponds to a feed discharge group. The feed discharge group is used to connect to an external hydraulic conveying system. By injecting water into the receiving cavity 201 connected to it, the feed in the receiving cavity 201 is discharged to the hydraulic conveying system. That is, after the water is injected into the receiving cavity 201, the feed in the receiving cavity 201 is carried out together and discharged to the hydraulic conveying system. Figure 5 The diagram shows another receiving cavity 201 corresponding to a drain group, which drains the water remaining in the receiving cavity 201.

[0033] If the three receiving chambers 201 are defined as the first receiving chamber, the second receiving chamber, and the third receiving chamber, respectively, at the beginning of operation, the first receiving chamber corresponds to the feed loading group, which fills the feed into the first receiving chamber. Then, the rotor assembly 200 rotates 120° for the first time. At this time, the first receiving chamber corresponds to the feed discharge group, which injects water into the first receiving chamber to discharge the feed into the hydraulic conveying system; simultaneously, the second receiving chamber corresponds to the feed loading group, which fills the feed into the second receiving chamber. Then, the rotor assembly 200 rotates 120° for the second time. At this time, the first receiving chamber corresponds to the water drain group, which drains the water remaining in the first receiving chamber; the second receiving chamber corresponds to the feed discharge group, which injects water into the second receiving chamber to discharge the feed into the hydraulic conveying system; and the third receiving chamber corresponds to the feed loading group, which fills the feed into the third receiving chamber. Then, the rotor assembly rotates 120° for the third time. At this time, the first receiving chamber re-aligns with the feed filling group, which fills the first receiving chamber with feed. The second receiving chamber aligns with the draining group, which drains the water remaining in the second receiving chamber. The third receiving chamber aligns with the feed discharging group, which injects water into the third receiving chamber to discharge the feed into the hydraulic conveying system. This cycle repeats, with the rotor assembly 200 simultaneously performing feed filling, water injection and discharge, and water drainage every 120° rotation. This achieves rapid feed injection into the hydraulic conveying system, resulting in high feed supply efficiency. Furthermore, the use of water injection to discharge the feed simultaneously reduces wear and tear, achieving low-loss feed discharge. The device provided in this application has a simple structural design and good feed supply effect.

[0034] The solution proposed in this application enables the use of hydraulic feed delivery technology, thereby achieving feed delivery over longer distances to meet the needs of marine aquaculture for long-distance feed delivery or for delivering feed to submerged aquaculture cages. It solves the key technical aspects of automated hydraulic feeding and delivery.

[0035] The three receiving cavities 201 have the same structure, each having an upper opening 202 and a lower opening 203; each receiving cavity 201 is provided with a filter screen with a mesh size smaller than the diameter of the pellet feed. The filter screen is used to support the pellet feed, prevent the feed from leaking out from the lower opening 203, and at the same time, it does not obstruct the flow of water.

[0036] Specifically, the rotor assembly 200 includes an upper rotor portion 21, a middle rotor portion 22, and a lower rotor portion 23 connected sequentially from top to bottom. The upper opening 202 is formed in the upper rotor portion 21, and the chamber 204 of the receiving cavity 201 is formed in the middle rotor portion 22. Specifically, the chamber 204 of the receiving cavity 201 is a vertical through-cavity that runs vertically through the middle rotor portion 22, and the lower opening 203 is formed in the lower rotor portion 23. In this way, the upper opening 202, the chamber 204, and the lower opening 203 are prepared separately, and then the upper rotor portion 21, the middle rotor portion 22, and the lower rotor portion 23 are spliced ​​and fixed to obtain the rotor assembly 200, which makes it easier to process and assemble.

[0037] The filter screen is assembled on the lower part 23 of the rotor. Specifically, the lower part 23 of the rotor is provided with an installation port, and the filter screen is fixedly assembled on the installation port. With this arrangement, the filter screen is assembled on the lower part 23 of the rotor before assembling the middle part 22 and the lower part 23 of the rotor, which facilitates the installation of the filter screen.

[0038] Of course, in other embodiments, the structure of the rotor assembly 200 is not limited to this, such as the upper part 21, the middle part 22 and the lower part 23 of the rotor being an integrally connected structure.

[0039] For details, please refer to [link / reference]. Figure 3 As shown, the feed loading assembly includes a feed inlet 111 located above the stator housing 100 and a lower outlet 112 located below the feed inlet 111. When the rotor assembly 200 rotates to one of the receiving cavities 201 corresponding to the feed loading assembly, the feed inlet 111 connects to the upper opening 202 of the receiving cavity 201, and the lower outlet 112 connects to the lower opening 203 of the receiving cavity 201. The stator housing 100 is equipped with a feeding hopper 31 connected to the feed inlet 111. Feed is injected from the feeding hopper 31, passes through the feed inlet 111, reaches the corresponding receiving cavity 201, and is supported by the filter screen inside the receiving cavity 201.

[0040] For details, please refer to Figure 4As shown, the feed discharge group includes a feed outlet 113 located above the stator housing 100 and a water inlet 114 located below the feed outlet 113. When the rotor assembly 200 rotates to one of the receiving cavities 201 corresponding to the feed discharge group, the feed outlet 113 connects to the upper opening 202 of the receiving cavity 201, and the water inlet 114 connects to the lower opening 203 of the receiving cavity 201. The stator housing 100 is equipped with a water inlet pipe 32 connected to the water inlet 114 and a discharge pipe 33 connected to the feed outlet 113. The discharge pipe 33 is used to connect to an external hydraulic conveying system. The water inlet pipe 32 is connected to a water pump. The water pump pumps water (such as water directly drawn from the fishpond or seawater) into the inlet pipe 32 and injects it into the receiving cavity 201. The water is injected upward from the lower opening 203 of the receiving cavity 201 and finally flows into the discharge pipe 33 from the upper opening 202 of the receiving cavity 201 until it is discharged into the hydraulic conveying pipeline system.

[0041] For details, please refer to Figure 5 As shown, the drainage group includes a vent 115 located above the stator housing 100 and a drain 116 located below the vent 115. When the rotor assembly 200 rotates to one of the receiving cavities 201 corresponding to the drainage group, the vent 115 connects to the upper opening 202 of the receiving cavity 201, and the drain 116 connects to the lower opening 203 of the receiving cavity 201. The water stored in the receiving cavity 201 is quickly discharged through the lower opening 203 and the drain 116 in sequence, so that feed can be injected next time. Specifically, the stator housing 100 is provided with a vent pipe 34 connected to the vent 115.

[0042] The stator housing 100 includes a cylindrical outer shell 11, an upper bushing 12, a lower bushing 13, an upper cover plate 14, and a lower cover plate 15. The upper bushing 12 and the lower bushing 13 are respectively fixed to the upper and lower ends of the inner cavity of the outer shell 11. A static seal is formed between the upper bushing 12 and the outer shell 11, and between the lower bushing 13 and the outer shell 11. The rotor assembly 200 is assembled inside the upper bushing 12 and the lower bushing 13. The upper cover plate 14 covers the end opening of the upper bushing 12, and the lower cover plate 15 covers the end opening of the lower bushing 13. The upper end of the rotor assembly 200 is rotatably fitted with the upper cover plate 14 through a bearing (defined as upper bearing 61), and the lower end of the rotor assembly 200 is rotatably fitted with the lower cover plate 15 through a bearing (defined as lower bearing 62). Specifically, the upper end of the rotor assembly 200 is an upper output disc shaft 24, which is rotatably coupled to the upper cover plate 14 via an upper bearing 61. The upper output disc shaft 24 also has a drive shaft extending upwards from the upper cover plate 14, which is used to connect to a rotary drive device. The lower end of the rotor assembly 200 is a lower output disc shaft 26, which is rotatably coupled to the lower cover plate 15 via a lower bearing 62.

[0043] Furthermore, in order to facilitate assembly with the upper bearing 61, in this embodiment, a first mounting opening 141 is provided in the middle of the upper cover plate 14, and the outer ring of the upper bearing 61 is fitted inside the first mounting opening 141 of the upper cover plate 14. At the same time, in order to protect the upper bearing 61, an upper bearing cover 16 is also covered on the top of the upper cover plate 14. The upper bearing cover 16 blocks the first mounting opening 141 of the upper cover plate 14 and positions the upper bearing 61.

[0044] Similarly, in order to facilitate assembly with the lower bearing 62, in this embodiment, a second mounting port 154 is provided in the middle of the lower cover plate 15. The outer ring of the lower bearing 62 is fitted inside the second mounting port 154 of the lower cover plate 15. At the same time, in order to protect the lower bearing 62, a lower bearing cover 17 is also provided at the bottom of the lower cover plate 15. The lower bearing cover 17 blocks the second mounting port 154 of the lower cover plate 15 and positions the lower bearing 62.

[0045] The upper bushing 12 and the lower bushing 13 are configured to fit the upper rotor portion 21 and the lower rotor portion 23 of the rotor assembly 200, with a large gap between the rotor middle portion 22 of the rotor assembly 200 and the outer casing 11. Thus, with the dimensions of the outer casing 11 and the rotor assembly 200 fixed, the thickness of the upper bushing 12 and the lower bushing 13 can be adjusted to achieve an optimal dimensional fit between the rotor assembly 200 and the stator casing 100.

[0046] The feed inlet 111 of the feed filling group, the feed outlet 113 of the feed discharge group, and the vent 115 of the water discharge group all pass through the upper bushing 12 and the outer shell 11; the lower outlet 112 of the feed filling group, the water inlet 114 of the feed discharge group, and the water outlet 116 of the water discharge group all pass through the lower bushing 13 and the outer shell 11.

[0047] To reduce friction between the rotor assembly 200 and the stator housing 100 during rotation, the rotor assembly 200 has a large clearance between itself and the upper bushing 12 and the lower bushing 13. Therefore, the rotor assembly 200 is fitted with sealing rings (defined as first sealing rings) on both the upper and lower sides of the upper opening 202 and the lower opening 203. These first sealing rings form an incomplete sealing fit with the stator housing 100; that is, the first sealing rings on both sides of the upper opening 202 form an incomplete sealing fit with the upper bushing 12, and the first sealing rings on both sides of the lower opening 203 form an incomplete sealing fit with the lower bushing 13. The first sealing ring forms an incomplete seal with the stator housing 100. On the one hand, this effectively reduces water leakage from the gaps on the upper and lower sides, allowing only a small amount of water to seep out from the first sealing ring. On the other hand, it avoids excessive wear of the first sealing ring, and the water seeping out from the first sealing ring also provides good lubrication for the first sealing ring, effectively improving its service life and reducing the number of maintenance times.

[0048] Furthermore, the stator housing 100 is provided with first drain outlets 41 on the upper and lower sides of the upper opening 202 of the receiving cavity 201 and on the upper and lower sides of the lower opening 203 of the receiving cavity 201, which can drain the leaked water in time and prevent water from continuing to seep into the rotating bearing.

[0049] Specifically, the rotor assembly 200 has a large space between the rotor middle section 22 and the outer casing 11 to collect water, which is then discharged from the first drain port 41. The rotor assembly 200 has small clearances between the upper part of the upper opening 202 and the upper bushing 12, and also small clearances between the lower part of the rotor assembly 200 and the lower bushing 13 at the lower part of the lower opening 203. These two locations are prone to water accumulation. Therefore, the rotor assembly 200 has drain annular grooves 205 at the upper part of the upper opening 202 and the lower part of the lower opening 203. The first drain port 41 corresponds to the drain annular grooves 205, which effectively collect water before it is discharged from the first drain port 41.

[0050] Meanwhile, at the same level as the inlet 114, water leakage may also occur in the fitting gap between the rotor assembly 200 and the lower bushing 13. To prevent high-pressure water entering through the inlet 114 from seeping into the other two groups (i.e., the feed loading group and the drainage group) and affecting operations, such as... Figure 8 As shown, in this embodiment, the stator housing 100 has a second drain outlet 42 at the same level as the lower opening 203 of the receiving cavity 201. The second drain outlet 42 is located between the feed discharge group and the feed filling group, and between the feed discharge group and the water discharge group. In this way, the water leaking from the mating gap will leak out from the second drain outlet 42 before reaching the feed filling group and the water discharge group.

[0051] Similarly, high-pressure water discharged from the feed outlet 113 of the feed discharge group will also seep out from the gaps in the mating of this layer, therefore, as Figure 7 As shown, the stator housing 100 has a third drain outlet 43 at the same level as the upper opening 202 of the receiving cavity 201. The third drain outlet 43 is located between the feed discharge group and the feed filling group, and between the feed discharge group and the water discharge group. In this way, water leaking from the mating gap will first leak out through the third drain outlet 43 before reaching the feed filling group and the water discharge group.

[0052] Specifically, the clearance fit between the rotor assembly 200 and the stator housing 100 allows the device to operate better, and the amount of water seeping out from the gap is small and will not affect the operation of the device.

[0053] Furthermore, the inlet pipe 32 is connected to the water pump. During operation, the water pump works continuously. When the lower opening 203 of the receiving cavity 201 is misaligned with the inlet 114, the water in the inlet pipe 32 will be blocked, which will affect or even damage the water pump. Therefore, in this embodiment, the rotor assembly 200 is provided with an auxiliary channel 501, and the stator housing 100 is provided with an auxiliary inlet 121 and an auxiliary outlet 122, as shown below. Figure 9 and Figure 10 As shown, there is one auxiliary inlet 121 and two auxiliary outlets 122, forming a one-inlet, two-outlet structure; of course, the number of auxiliary inlets 121 and auxiliary outlets 122 is not limited to this. When the rotor assembly 200 rotates to the point where the receiving cavity 201 is offset from the inlet and outlet assembly, as... Figure 10 As shown, the auxiliary inlet 121 and auxiliary outlet 122 are connected to the auxiliary channel 501 of the rotor assembly 200. The auxiliary inlet 121 shares an inlet pipe 32 with the connecting inlet 114. Thus, when the inlet 114 is blocked, water from the inlet pipe 32 can enter the auxiliary channel 501 from the auxiliary inlet 121 and then flow out from the auxiliary outlet 122, preventing the water pump from being affected by the blockage of the inlet pipe 32. When the lower opening 203 of the receiving cavity 201 corresponds to the inlet 114, as... Figure 9 As shown, the auxiliary inlet 121 and the auxiliary channel 501 are staggered, and water flows in from the inlet 114.

[0054] Furthermore, the rotor assembly 200 also includes an auxiliary part 25, which is spliced ​​to the lower end of the rotor lower part 23. The auxiliary channel 501 is formed on the auxiliary part 25. Specifically, the auxiliary part 25 also forms an incomplete sealing fit with the lower bushing 13 through the first sealing ring. A water leakage ring groove 205 is also provided below the auxiliary channel 501, and a first water leakage port 41 corresponding to the water leakage ring groove 205 below the auxiliary channel 501 is also provided on the stator housing 100 to realize water collection and unified discharge.

[0055] Furthermore, the auxiliary water outlet 122 is connected to the auxiliary water outlet pipe 37, and the auxiliary water outlet pipe 37 is connected to the discharge pipe 33. The water flowing out of the auxiliary water outlet 122 is also discharged into the hydraulic conveying system through the discharge pipe 33, which simplifies the structure and at the same time can further clean up any feed that may remain in the discharge pipe 33.

[0056] Meanwhile, in order to ensure that the upper bearing 61 at the upper end and the lower bearing 62 at the lower end of the rotor assembly 200 are not easily affected by water seeping out from the gap, in this embodiment, at the upper end of the rotor assembly 200, the upper output disc shaft 24 is provided with an upwardly protruding first annular wall 241 around the upper bearing 61. The first annular wall 241 cooperates with the upper cover plate 14 through a sealing ring (defined as the second sealing ring). At the same time, on the outside of the first annular wall 241, the upper bushing 12 is also provided with a fourth water outlet 44. With this configuration, the high-pressure water discharged from the feed outlet 113 of the feed discharge group seeps upward through the upper water leakage ring groove 205 and is discharged from the first water outlet 41. If the water in the water leakage ring groove 205 seeps upward to the upper output disc shaft 24, then this part of the water will also be discharged from the fourth water outlet 44. Furthermore, the first annular wall 241 provided around the upper bearing 61 and the structure in which the first annular wall 241 and the upper cover plate 14 are fitted by the second sealing ring can further ensure that the water will not cross the first annular wall 241 and come into contact with the upper bearing 61.

[0057] At the lower end of the rotor assembly 200, such as Figure 12 As shown, the lower cover plate 15 has an upwardly protruding second annular wall 151 around the lower bearing 62. The outer ring of the lower bearing 62 is fitted onto the inner annular wall of the second annular wall 151. The outer annular wall of the second annular wall 151 is engaged with the lower output disc shaft 26 through a third sealing ring. The outer periphery of the second annular wall 151 forms an annular groove 153. The lower cover plate 15 also has a water leakage hole 152 that runs vertically through the groove 153. When water seeps into the lower cover plate 15 from the gap between the lower output disc shaft 26 and the lower bushing 13, the water will collect in the groove 153 and then leak out from the water leakage hole 152 in time. In this way, water is effectively prevented from contacting the lower bearing 62.

[0058] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art will understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A device for injecting pelleted feed into a hydraulic conveying pipeline system, characterized in that: The system includes a stator housing and a rotor assembly. The rotor assembly is rotatably mounted within the stator housing and has three receiving cavities evenly distributed along its circumference. The stator housing has three sets of inlet / outlet groups, also evenly distributed along its circumference, and arranged sequentially along the rotor assembly's rotation direction as a feed filling group, a feed discharging group, and a water draining group. Each 120° rotation of the rotor assembly causes the three receiving cavities to correspond to the three sets of inlet / outlet groups. The feed filling group is used to fill feed into the connected receiving cavity. The feed discharging group is connected to an external hydraulic conveying system and discharges the feed from the connected receiving cavity into the hydraulic conveying system by injecting water into it. The water draining group discharges any remaining water from the receiving cavities. Each of the three receiving cavities has an upper opening and a lower opening; each receiving cavity is equipped with a filter screen with mesh sizes smaller than the diameter of the pellet feed. The feed filling assembly includes a feed inlet located above the stator housing and a lower outlet located below the feed inlet. When the rotor assembly rotates to one of the receiving cavities corresponding to the feed filling assembly, the feed inlet connects to the upper opening of the receiving cavity, and the lower outlet connects to the lower opening of the receiving cavity. The stator housing is equipped with a feeding hopper connected to the feed inlet. The feed discharge assembly includes a feed outlet located above the stator housing and a water inlet located below the feed outlet. When the rotor assembly rotates to one of the receiving cavities corresponding to the feed discharge assembly, the feed outlet connects to the upper opening of the receiving cavity, and the water inlet connects to the lower opening of the receiving cavity. The stator housing is equipped with a water inlet pipe connected to the water inlet and a feed discharge pipe connected to the feed outlet. The feed discharge pipe is used to connect to an external hydraulic conveying system. The water inlet pipe is used to connect to a water pump. The drain assembly includes a vent above the stator housing and a drain below the vent. When the rotor assembly rotates to one of the receiving cavities corresponding to the drain assembly, the vent connects to the upper opening of the receiving cavity, and the drain connects to the lower opening of the receiving cavity.

2. The apparatus for injecting pelleted feed into a hydraulic conveying pipeline system according to claim 1, characterized in that: The rotor assembly is provided with an auxiliary channel, and the stator housing is provided with an auxiliary water inlet and an auxiliary water outlet. When the rotor assembly rotates to the point where the receiving cavity is misaligned with the inlet and outlet group, the auxiliary water inlet and the auxiliary water outlet are connected to the auxiliary channel of the rotor assembly. The auxiliary water inlet and the water inlet share the same water inlet pipe.

3. The apparatus for injecting pelleted feed into a hydraulic conveying pipeline system according to claim 2, characterized in that: The auxiliary water outlet is connected to the auxiliary water outlet pipe, and the auxiliary water outlet pipe is connected to the discharge pipe.

4. The apparatus for injecting pelleted feed into a hydraulic conveying pipeline system according to claim 1, characterized in that: The stator housing includes a cylindrical outer shell, an upper bushing, a lower bushing, an upper cover plate, and a lower cover plate. The upper bushing and the lower bushing are respectively fixed at the upper and lower ends of the inner cavity of the outer shell. The rotor assembly is assembled inside the upper bushing and the lower bushing. The upper cover plate covers the end opening of the upper bushing, and the lower cover plate covers the end opening of the lower bushing. The upper end of the rotor assembly is rotatably fitted with the upper cover plate through a bearing, and the lower end of the rotor assembly is rotatably fitted with the lower cover plate through a bearing.

5. The apparatus for injecting pelleted feed into a hydraulic conveying pipeline system according to claim 1 or 4, characterized in that: The rotor assembly has three accommodating cavities, each with an upper opening and a lower opening. The rotor assembly is equipped with sealing rings on both the upper and lower sides of the upper opening and the lower opening. The sealing rings form an incomplete sealing fit with the stator housing. The stator housing has first water leakage ports on both the upper and lower sides of the upper opening of the accommodating cavity and the lower opening of the accommodating cavity.

6. The apparatus for injecting pelleted feed into a hydraulic conveying pipeline system according to claim 5, characterized in that: The stator housing has a second drain outlet at the same level as the lower opening of the receiving cavity. The second drain outlet is located between the feed discharge group and the feed filling group, and between the feed discharge group and the drain group. The stator housing has a third drain outlet at the same level as the upper opening of the receiving cavity. The third drain outlet is located between the feed discharge group and the feed filling group, and between the feed discharge group and the drain group.

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