A star feeder

Abstract

The application provides a star feeder, and relates to the technical field of unloading equipment, which comprises a valve body, a rotating shaft, a blade and an adjusting rod, wherein the upper part of the valve body is provided with an inlet, the lower part of the valve body is provided with an outlet, and the right side of the valve body is detachably connected with an end cover; the rotating shaft is transversely arranged in the valve body; the rotating shaft is internally provided with a first guide channel, an equalizing chamber and a second guide channel which are sequentially connected; the blade is located between the inlet and the outlet; one end of the blade is in contact with the valve body, and the other end of the blade is located in the rotating shaft and connected with a first piston; the first piston is in sliding sealing cooperation with the second guide channel; one end of the adjusting rod is movably penetrated through the end cover, and the other end of the adjusting rod is located in the first guide channel and connected with a second piston; the second piston is in sliding sealing cooperation with the first guide channel; and the first piston and the second piston are filled with hydraulic oil. After the blade is worn, a controllable thrust is applied to the adjusting rod, power is transmitted by the hydraulic oil, each blade is driven to extend outward from the rotating shaft, and the gap between the blade and the valve body is compensated.

Description

Technical Field

[0001] This utility model relates to the field of unloading equipment technology, and in particular to a star feeder. Background Technology

[0002] A rotary feeder, also known as a rotary valve, is a special type of unloading equipment, typically consisting of an impeller, housing, reducer, and motor. The working principle of a rotary feeder is that material falls and fills the gaps between adjacent blades of the impeller; the material is then discharged as the blades rotate.

[0003] Rotary rotary feeders are commonly used in production to transport raw materials, which are then combined in specific proportions to produce the finished product. When using rotary feeders, good sealing is essential to prevent gas leaks. The sealing of a rotary feeder mainly consists of two parts: the seal between the blades and the housing, and the seals on the end caps on both sides of the housing. The seal between the blades and the housing is achieved through close contact. As the blades rotate and wear, the gap between the blades and the housing increases, reducing the sealing performance and creating a risk of gas leakage from inside the housing.

[0004] Chinese patent application No. 202321246781.3 provides a solution that connects the blade to the shaft via a spring, using the spring's restoring force to compensate for blade wear and maintain contact between the blade and the housing. However, this solution still has the following drawbacks: although the spring extends to push the blade after blade wear, bringing it into contact with the housing, the force exerted by the spring on the blade decreases after extension, reducing the compressive force between the blade and the housing. This means the sealing effect between the blade and the housing cannot be restored to its original state, and further improvements are needed. Utility Model Content

[0005] In view of the above situation, this utility model provides a star-shaped feeder, which aims to solve the technical problem that the force exerted by the spring on the blades decreases after the spring is stretched, the extrusion pressure between the blades and the shell decreases, and the sealing effect between the blades and the shell cannot be restored to its original state.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a star feeder, comprising:

[0008] The valve body has a feed inlet at the top, a discharge outlet at the bottom, and a detachable end cap on the right side;

[0009] A rotating shaft is laterally disposed within the valve body; the rotating shaft has a first guide channel, a pressure equalizing chamber, and a second guide channel connected in sequence; the first guide channel and the pressure equalizing chamber are arranged along the axial direction of the rotating shaft, and the second guide channel is arranged along the radial direction of the rotating shaft;

[0010] The blades are located between the inlet and outlet; multiple blades are distributed circumferentially along the shaft. One end of the blade is in sealing contact with the inner wall of the valve body, and the other end is located inside the shaft and connected to the first piston. The first piston is in sliding sealing cooperation with the second guide channel.

[0011] The adjusting rod has one end that moves through the end cap and the other end that is located in the first guide channel and connected to the second piston. The second piston is in sliding sealing fit with the first guide channel. Hydraulic oil is filled between the first piston and the second piston.

[0012] In some embodiments of this utility model, there are 6 blades.

[0013] In some embodiments of this utility model, the valve body has an oil injection channel.

[0014] In some embodiments of this utility model, a sealing structure is provided between the rotating shaft and the valve body.

[0015] In some embodiments of this utility model, a drive motor is also included, and the drive motor and the rotating shaft are connected by magnetic transmission.

[0016] In some embodiments of this utility model, an outer cover is also included, which is sealed to the right side of the valve body, and the end cap is located inside the outer cover.

[0017] In some embodiments of this utility model, the outer cover has a leakage sensor and an exhaust port, and the outlet of the valve body is connected to a return port; the exhaust port and the return port are connected to a return air pump through a return pipe; the adjusting rod passes through the outer cover, and the two are movably sealed.

[0018] In some embodiments of this invention, the return pipe has a one-way valve.

[0019] The embodiments of this utility model have at least the following advantages or beneficial effects:

[0020] After wear occurs at the end of the blade furthest from the shaft, a thrust is applied to the adjusting rod, and the hydraulic oil transmits the power to drive each blade to extend outward from the shaft to compensate for the gap between the blade and the valve body. After the thrust is applied to the adjusting rod, the magnitude of the reaction force on the adjusting rod is detected and controlled to keep it stable, which can keep the pressure of the blade in contact with the valve body stable. In this way, the sealing effect between the blade and the valve body can be restored to its original state.

[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the star feeder provided in Example 1;

[0024] Figure 2 A schematic diagram of a structure in which multiple blades are circumferentially spaced along the axis of rotation;

[0025] Figure 3 This is a schematic diagram of the star feeder provided in Example 2.

[0026] icon:

[0027] 1-Valve body, 11-Inlet, 12-Outlet, 121-Reflux port, 13-End cap

[0028] 2-Shaft, 21-Bearing, 22-Sealing structure, 23-Oil injection channel, 24-First guide channel, 25-Pressure equalizing chamber, 26-Second guide channel

[0029] 3-blade, 31-first piston,

[0030] 4-Adjusting rod, 41-Second piston,

[0031] 51-Isolation cover, 52-Inner rotor, 53-Outer rotor

[0032] 6-Outer casing, 61-Leakage sensor interface, 62-Exhaust port. Detailed Implementation

[0033] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0034] In the description of the embodiments of this utility model, it should be understood that the terms "lateral", "up", "down", "left", "right", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, 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 the embodiments of this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "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 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 embodiment of the invention according to the specific circumstances.

[0037] The embodiments of this utility model will be described in detail below.

[0038] Example 1

[0039] See Figures 1-2 This embodiment provides a star feeder, including a valve body 1, a rotating shaft 2, blades 3, an adjusting rod 4, and a drive motor (not shown in the figure).

[0040] The valve body 1 has an inlet 11 at the top, an outlet 12 at the bottom, and an end cap 13 detachably connected to the right side.

[0041] The rotating shaft 2 is laterally disposed within the valve body 1, and is rotatably connected to the valve body 1 via a bearing 21. A sealing structure 22 (such as a packing seal or gas seal) is provided between the rotating shaft 2 and the valve body 1. The valve body 1 has an oil injection channel 23 for adding lubricating oil to lubricate the rotating shaft 2. The rotating shaft 2 has a first guide channel 24, a pressure equalizing chamber 25, and a second guide channel 26 connected in sequence. The first guide channel 24 and the pressure equalizing chamber 25 are arranged axially along the rotating shaft 2, and the second guide channel 26 is arranged radially along the rotating shaft 2.

[0042] The blades 3 are located between the inlet 11 and the outlet 12. Multiple (6) blades 3 are distributed circumferentially along the rotating shaft 2. One end of the blade 3 is in sealing contact with the inner wall of the valve body 1, and the other end is located inside the rotating shaft 2 and connected to a first piston 31 that is roughly rectangular. The first piston 31 is in sliding sealing cooperation with the second guide channel 26. The blades 3 are made of stainless steel and have an acid-resistant coating on their outer surface.

[0043] One end of the adjusting rod 4 moves through the end cover 13, and the other end is located in the first guide channel 24 and connected to the second piston 41. The second piston 41 is in sliding sealing fit with the first guide channel 24. Hydraulic oil is filled between the first piston 31 and the second piston 41.

[0044] The drive motor is connected to the left end of the rotating shaft 2 via a magnetic coupling. The drive motor and the magnetic coupling are connected by a reducer (not shown in the figure). The magnetic coupling is suitable for applications requiring high sealing performance. It includes an isolation cover 51, an inner rotor 52, and an outer rotor 53. The isolation cover 51 is connected to the left side of the valve body 1. The left end of the rotating shaft 2 extends into the isolation cover 51 and is assembled with the inner rotor 52. The outer rotor 53 is rotatably connected to the outer wall of the isolation cover 51. The inner rotor 52 and the outer rotor 53 utilize magnetic force for transmission, resulting in good sealing performance. Gas inside the valve body 1 is unlikely to leak from the connection between the magnetic coupling and the rotating shaft 2.

[0045] The working principle of the star feeder is as follows: the drive motor drives the rotating shaft 2 and the blades 3 to rotate at a speed of 8~17 r / min. The material entering the valve body 1 from the feed port 11 falls and fills the space between two adjacent blades 3. As the rotating shaft 2 and the blades 3 rotate, the material is discharged from the discharge port 12. After wear occurs at the end of the blades 3 away from the rotating shaft 2, a thrust is applied to the adjusting rod 4, and the power is transmitted by hydraulic oil to drive each blade 3 to extend outward from the rotating shaft 2 to compensate for the gap between the blades 3 and the valve body 1. After the thrust is applied to the adjusting rod 4, the magnitude of the reaction force on the adjusting rod 4 is detected and controlled to keep it stable, so that the pressure of the blades 3 in contact with the valve body 1 can be kept stable. In this way, the sealing effect between the blades 3 and the valve body 1 can be restored to the original state. That is, this embodiment has a better sealing compensation effect between the blades 3 and the valve body 1 than the prior art.

[0046] Example 2

[0047] This embodiment is a further improvement based on Embodiment 1.

[0048] See Figures 1-3 In this embodiment, the star feeder also includes an outer cover 6, which is sealed to the right side of the valve body 1, and the end cap 13 is located inside the outer cover 6. The outer cover 6 has a leakage sensor interface 61 and an exhaust interface 62, and the outlet 12 of the valve body 1 is connected to a return port 121. The leakage sensor interface 61 is used to connect a leakage sensor, which is used to detect whether there is a corresponding gas leakage at the end cap 13. The exhaust interface 62 and the return port 121 are connected to a return air pump (not shown in the figure) through a return pipe, and the return pipe has a one-way valve.

[0049] The adjusting rod 4 passes through the outer cover 6, and the two are in a movable seal.

[0050] The above scheme provides more redundancy in the sealing of the star feeder; when the sealing structure 22 between the rotating shaft 2 and the valve body 1 fails, the leakage sensor detects gas leakage into the outer cover and starts the return air pump to send the leaked gas back to the discharge port 12 and the downstream equipment.

[0051] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A star-shaped feeder, characterized in that, include: The valve body has a feed inlet at the top, a discharge outlet at the bottom, and a detachable end cap on the right side; A rotating shaft is laterally disposed within the valve body; the rotating shaft has a first guide channel, a pressure equalization chamber, and a second guide channel connected in sequence; the first guide channel and the pressure equalization chamber are disposed along the axial direction of the rotating shaft, and the second guide channel is disposed along the radial direction of the rotating shaft; A blade is located between the feed inlet and the discharge outlet; multiple blades are distributed circumferentially along the rotating shaft, one end of each blade is in sealed contact with the inner wall of the valve body, and the other end is located inside the rotating shaft and connected to a first piston, the first piston being in sliding sealing cooperation with the second guide channel; The adjusting rod has one end that moves through the end cap and the other end located in the first guide channel and connected to a second piston. The second piston is in sliding sealing fit with the first guide channel. Hydraulic oil is filled between the first piston and the second piston.

2. The star feeder according to claim 1, characterized in that, There are 6 blades.

3. The star feeder according to claim 1, characterized in that, The valve body has an oil injection channel.

4. The star feeder according to claim 1, characterized in that, A sealing structure is provided between the rotating shaft and the valve body.

5. The star feeder according to claim 1, characterized in that, It also includes a drive motor, which is connected to the rotating shaft by magnetic force.

6. The star feeder according to any one of claims 1 to 5, characterized in that, It also includes an outer cover, which is sealed to the right side of the valve body, and the end cap is located inside the outer cover.

7. The star feeder according to claim 6, characterized in that, The outer casing has a leakage sensor and an exhaust port, and the outlet of the valve body is connected to a return port; the exhaust port and the return port are connected to a return air pump through a return pipe; the adjusting rod passes through the outer casing, and the two are movably sealed.

8. The star feeder according to claim 7, characterized in that, The return pipe is equipped with a check valve.

Images