Main shaft aeration device

Abstract

The utility model is applicable to the technical field of aeration equipment, and provides a main shaft aeration device, which comprises a shaft body and a shell, the lower end of the shaft body rotatably penetrates into the shell, four cylinders arranged in a circumferential array are arranged on the outer surface of the shell, the cylinders are all communicated with the interior of the shell, pistons are slidably connected in the cylinders, and the pistons are connected with the outer surface of the shell. A crankshaft is arranged at the lower end of the shaft body, four connecting rods are hinged to the outer surface of the crankshaft, the other ends of the connecting rods extend into the air cylinder and are hinged to the piston, a shaft body air channel communicated with the hollow main shaft is formed in the upper surface of the shaft body, a round through hole is formed in the middle of the crankshaft and communicated with the shaft body air channel, and an air inlet hole for air inflow is formed in the outer surface of the air cylinder. According to the circulating aeration structure, the aeration effect is achieved in a circulating and reciprocating manner, and the whole aeration structure is small in size, compact in structure, tight in combination with the main shaft and good in aeration effect.

Description

Technical Field

[0001] This utility model relates to the field of aeration equipment technology, and more specifically, to a main shaft aeration device. Background Technology

[0002] There are many ways to aerate inside a mixing tank, among which main shaft ventilation is one of the most efficient aeration methods. It connects to the mixing blades through a hollow main shaft, and aeration is achieved through the densely packed aeration holes on the blades. During the mixing process, aeration ensures that the material is in full contact with the gas.

[0003] Because the mixing shaft rotates continuously, the ventilation device cannot be directly connected to the main shaft. Therefore, the traditional solution is to put a sealed air box on the main shaft and connect an air compressor to the air box. The air compressor requires an independent power source, which makes the equipment not only large and complex in structure, but also has poor airtightness due to the many interfaces. If the pressure is insufficient, the aeration effect will be greatly reduced. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a main shaft aeration device with a compact structure and a tight connection with the main shaft.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A main shaft aeration device includes a shaft and a housing. The lower end of the shaft rotatably penetrates into the housing. Four cylinders arranged in a circumferential array are provided on the outer surface of the housing. Each cylinder communicates with the interior of the housing. A piston is slidably connected inside the cylinder. A crankshaft is provided at the lower end of the shaft. Four connecting rods are hinged to the outer surface of the crankshaft. The other end of each connecting rod extends into the cylinder and is hinged to the piston. A shaft air passage communicating with a hollow main shaft is provided on the upper surface of the shaft. A circular through hole is provided in the middle of the crankshaft, communicating with the shaft air passage. An air inlet is provided on the outer surface of the cylinder for air intake. One-way valves are provided in both the piston and the air inlet.

[0007] The present invention is further configured such that: a coupling for connecting to the hollow main shaft for aeration is sleeved on the top of the shaft body, and the hollow main shaft that needs to be aerated can be connected through the coupling, and the outer shell is fixed on the outer body of the main shaft.

[0008] The present invention is further configured such that: a sealing ring is provided on the top of the outer shell, and the sealing ring is coaxially fitted with the shaft.

[0009] The present invention is further configured such that: the one-way valve includes a sealing plate for sealing and an installation plate for installation; a movable slide rod is provided on the surface of the sealing plate facing the installation plate; the other end of the movable slide rod slides through the installation plate; a baffle is provided at the end of the movable slide rod that passes through the installation plate; and an elastic element is provided between the baffle and the installation plate, which is movably sleeved on the outer surface of the movable slide rod.

[0010] The present invention is further configured such that a filter plate for isolating dust is provided inside the air inlet of the cylinder.

[0011] The present invention is further configured such that: a rotating shaft is rotatably sleeved at the center of the filter plate, and a cleaning brush is provided on the outer surface of one end of the rotating shaft outside the cylinder; the bristles of the cleaning brush contact the outer surface of the filter plate and slide.

[0012] The present invention is further configured such that: a twisted rod is provided on the surface of the baffle near the filter plate facing the rotating shaft, and a twisted groove is provided on the surface of the rotating shaft facing the twisted rod, and the rotating shaft is spirally sleeved on the outer surface of the twisted rod through the twisted groove.

[0013] The advantages of this utility model are:

[0014] Firstly, this utility model achieves the aeration effect through repeated cycles, and the overall aeration structure is small in size, compact in structure, tightly integrated with the main shaft, and has a good aeration effect.

[0015] Secondly, by setting up a filter plate and its surface cleaning structure, this utility model can effectively prevent external dust from entering the shell, thus minimizing the risk of aeration holes being clogged by dust. At the same time, the cleaning structure can automatically clean the dust adhering to the surface of the filter plate, preventing excessive dust from clogging the filter plate mesh and ensuring the long-term performance of the filter plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a main shaft aeration device according to the present invention;

[0017] Figure 2 This is a cross-sectional view of the outer shell of this utility model;

[0018] Figure 3 This is a front plan view of the internal structure of the outer shell of this utility model;

[0019] Figure 4 This is a cross-sectional view of the crankshaft of this utility model;

[0020] Figure 5 This is a front view plan view of the air inlet of the cylinder of this utility model.

[0021] In the diagram: 1. Shaft; 2. Housing; 3. Piston; 4. Connecting rod; 5. One-way valve; 11. Coupling; 12. Shaft air passage; 13. Crankshaft; 21. Sealing ring; 22. Cylinder; 51. Sealing plate; 52. Mounting plate; 53. Movable slide bar; 54. Baffle; 55. Elastic element; 56. Filter plate; 57. Rotating shaft; 58. Cleaning brush; 59. Twisted rod; 510. Twisted groove. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Please see Figure 1-5 The present invention provides the following technical solution:

[0025] Specifically, it refers to a main shaft aeration device, including a shaft body 1 and a housing 2. The lower end of the shaft body 1 rotatably penetrates into the housing 2. The outer surface of the housing 2 is provided with four cylinders 22 arranged in a circumferential array. Each cylinder 22 is connected to the interior of the housing 2. A piston 3 is slidably connected inside the cylinder 22. A crankshaft 13 is provided at the lower end of the shaft body 1. Four connecting rods 4 are hinged to the outer surface of the crankshaft 13. The other end of the connecting rod 4 extends into the cylinder 22. A groove is opened on the surface of the piston 3 facing the inside of the shaft body 1. A hinge shaft is provided in the groove. One end of the connecting rod 4 located inside the cylinder 22 is rotatably sleeved on the hinge shaft.

[0026] When in use, as the shaft 1 rotates, the crankshaft 13 rotates synchronously with the shaft 1, and the connecting rod 4 can pull the piston 3 back and forth in the cylinder 22.

[0027] The upper surface of the crankshaft 1 has a crankshaft air passage 12 that communicates with the hollow main shaft. The crankshaft 13 has a circular through hole in the middle, which communicates with the crankshaft air passage 12 (see attached image). Figure 4 The outer surface of cylinder 22 is provided with an air inlet hole for air intake, and the side surface of piston 3 facing away from the groove is provided with a sealing hole communicating with the groove. A one-way valve 5 is provided in the sealing hole, and a one-way valve 5 is also provided in the air inlet hole of cylinder 22.

[0028] During use, the four pistons 3 move inward simultaneously. As the one-way valve 5 on the piston 3 closes, the gas inside the outer shell 2 is forced into the shaft air passage 12 of the shaft 1. The one-way valve 5 on the cylinder 22 opens under the action of external atmospheric pressure, and the gas is drawn into the cylinder 22. When the four pistons 3 move outward simultaneously, the airflow causes the one-way valve 5 on the cylinder 22 to close, and the gas inside the cylinder 22 is forced into the inner side of the outer shell 2, thus achieving the aeration effect through repeated cycles. The above aeration structure is small in size, compact in structure, tightly integrated with the main shaft, and has a good aeration effect.

[0029] The top of the shaft 1 is fitted with a coupling 11 that connects to the hollow main shaft for aeration. Any hollow main shaft that needs aeration can be connected through the coupling 11. The outer shell 2 is fixed on the outer body of the main shaft. Therefore, when the hollow main shaft rotates, the shaft 1 rotates synchronously under the drive of the coupling 11, while the outer shell 2 remains fixed.

[0030] A sealing ring 21 is provided on the top of the outer casing 2. The sealing ring 21 is coaxially fitted with the shaft 1 to increase the sealing between the shaft 1 and the outer casing 2.

[0031] The one-way valve 5 inside piston 3 has the same structure as the one-way valve 5 inside cylinder 22. Therefore, the following discussion mainly focuses on the one-way valve 5 inside cylinder 22. The one-way valve 5 includes a sealing plate 51 and a mounting plate 52 for sealing. The mounting plate 52 is disposed inside the air inlet of cylinder 22. A movable slide rod 53 is disposed on the surface of sealing plate 51 facing mounting plate 52. The other end of the movable slide rod 53 slides through mounting plate 52. A baffle 54 is disposed at the end of the movable slide rod 53 that extends through mounting plate 52. A space is provided between the baffle 54 and mounting plate 52. An elastic element 55 is provided on the outer surface of the movable slide rod 53. When the elastic element 55 is not compressed, it will exert a pushing force on the baffle 54, causing the movable slide rod 53 to pull the sealing plate 51 to seal the air inlet or sealing hole. When the sealing plate 51 is compressed by the airflow, the airflow will exert a pushing force on the sealing plate 51, pushing the sealing plate 51 to the side away from the mounting plate 52. At the same time, the elastic element 55 is compressed and contracts. When the sealing plate 51 is no longer pushed by the airflow, the elastic element 55 pushes the sealing plate 51 to the initial position.

[0032] In this embodiment, when external gas enters the outer casing 2 through cylinder 22, external dust inevitably enters the outer casing 2 along with the gas. If this gas enters the hollow main shaft, it can easily cause blockage of the aeration holes. To address this problem, a structure is added based on the above solution. (See attached diagram.) Figure 5 A filter plate 56 is installed in the air inlet of cylinder 22 to isolate dust, which can minimize the possibility of dust entering the housing 2.

[0033] A rotating shaft 57 is rotatably mounted at the center of the filter plate 56. A cleaning brush 58 is provided on the outer surface of the end of the rotating shaft 57 outside the cylinder 22. The bristles of the cleaning brush 58 contact and slide with the outer surface of the filter plate 56. When the rotating shaft 57 rotates, the cleaning brush 58 rotates with the rotating shaft 57. At this time, the bristles on the cleaning brush 58 can clean the dust attached to the surface of the filter plate 56, preventing excessive dust from clogging the mesh of the filter plate 56 and ensuring the long-term use effect of the filter plate 56.

[0034] A twisted rod 59 is provided on the surface of the baffle 54 facing the rotating shaft 57, and a twisted groove 510 is provided on the surface of the rotating shaft 57 facing the twisted rod 59. The rotating shaft 57 is spirally sleeved on the outer surface of the twisted rod 59 through the twisted groove 510. When the baffle 54 moves with the movable slide rod 53, the twisted rod 59 moves synchronously in the twisted groove 510. Therefore, the rotating shaft 57 rotates under the transmission of the twisted rod 59 thread. With the above structure, the surface of the filter plate 56 can be automatically cleaned when the one-way valve 5 is opened or closed, without the need for manual control, which reduces the workload and effort of the staff.

[0035] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A main shaft aeration device, comprising a shaft (1) and a housing (2), characterized in that: The lower end of the shaft (1) rotates through into the outer shell (2). The outer surface of the outer shell (2) is provided with four cylinders (22) arranged in a circular array. The cylinders (22) are all connected to the inside of the outer shell (2). A piston (3) is slidably connected inside the cylinder (22). The lower end of the shaft (1) is provided with a crankshaft (13). The outer surface of the crankshaft (13) is hinged with four connecting rods (4). The other end of the connecting rods (4) extends into the cylinder (22) and is hinged to the piston (3). The upper surface of the shaft (1) is provided with a shaft air passage (12) that communicates with the hollow main shaft. The middle part of the crankshaft (13) has a circular through hole that communicates with the shaft air passage (12). The outer surface of the cylinder (22) is provided with an air inlet for air intake. A one-way valve (5) is provided in both the piston (3) and the air inlet.

2. The spindle aeration device of claim 1, wherein: The top of the shaft (1) is fitted with a coupling (11) that connects to the hollow main shaft for aeration. The hollow main shaft that needs aeration can be connected through the coupling (11), and the outer shell (2) is fixed on the outer body of the main shaft.

3. The spindle aeration device of claim 1, wherein: The top of the outer shell (2) is provided with a sealing ring (21), which is coaxially fitted with the shaft (1).

4. The spindle aeration device of claim 1, wherein: The one-way valve (5) includes a sealing plate (51) for sealing and a mounting plate (52) for installation. A movable slide rod (53) is provided on the surface of the sealing plate (51) facing the mounting plate (52). The other end of the movable slide rod (53) slides through the mounting plate (52). A baffle (54) is provided at one end of the movable slide rod (53) that passes through the mounting plate (52). An elastic element (55) is provided between the baffle (54) and the mounting plate (52) and is movably sleeved on the outer surface of the movable slide rod (53).

5. The spindle aeration device of claim 4, wherein: The cylinder (22) has a filter plate (56) installed in its air inlet to isolate dust.

6. The spindle aeration device of claim 5, wherein: A rotating shaft (57) is rotatably sleeved at the center of the filter plate (56). A cleaning brush (58) is provided on the outer surface of one end of the rotating shaft (57) outside the cylinder (22). The bristles of the cleaning brush (58) contact the outer surface of the filter plate (56) and slide.

7. The spindle aeration device of claim 6, wherein: A twisted rod (59) is provided on the surface of the baffle (54) near the filter plate (56) facing the rotating shaft (57). A twisted groove (510) is provided on the surface of the rotating shaft (57) facing the twisted rod (59). The rotating shaft (57) is spirally sleeved on the outer surface of the twisted rod (59) through the twisted groove (510).

Images