A shearing type air lock

Abstract

The present invention discloses a shearing air lock. Driven by a rotating ring, a shearing mechanism can be switched between a first state and a second state; in the first state, all blades are spliced into a closed plate, and the closed plate closes the ring hole; in the second state, all blades are tangent to the hole wall of the ring hole. During feeding, the rotating ring drives the blades to extend outward towards the hole wall, so that the blades are spliced into a closed plate, and the closed plate closes the ring hole of the rotating ring and the ring hole of the fixed ring, and the material falls on the closed plate; during discharging, the rotating ring rotates back and drives the blades to retract inward towards the hole wall, and the blades are tangent to the hole walls of the above two ring holes, and the hole walls scrape the material on the blades, which can effectively reduce the blockage and jamming of the blades.

Description

Technical Field

[0001] The present invention relates to the technical field of air shut-off devices, and particularly relates to a shear type air shut-off device. Background Art

[0002] An air shut-off device is an important device in a pneumatic conveying and ventilation and dust removal network. Its main function is to continuously and timely discharge the materials in a discharger or a dust collector, and at the same time prevent external air from entering the discharger or the dust collector. It is widely applicable to the pneumatic transportation of equipment in industries such as rice milling, flour milling, feed, machinery, chemical industry, medicine, tobacco, metallurgy, cement and dust removal, and the discharging of the pipe network pressure state. Therefore, the anti-blocking performance is an important standard for evaluating the quality of an air shut-off device.

[0003] In the prior art, an air shut-off device generally includes a housing, an impeller, an impeller shaft and two end covers on both sides. There is a certain gap between the blades of the impeller and the housing. There is a feed inlet at the upper end of the housing for receiving materials. During the continuous rotation of the impeller, the materials are discharged from the discharge outlet. When the impeller and the housing run with materials for a long time, the materials are likely to accumulate on the blades. When the impeller rotates, the materials are blocked between the blades and the housing, resulting in the impeller being stuck and stopped. Summary of the Invention

[0004] In order to make up for the above technical deficiencies, the present invention provides a shear type air shut-off device to solve the technical problem of material blockage on the blades in the prior art.

[0005] An embodiment of the present invention provides a shear type air shut-off device, including a housing and at least one shear mechanism;

[0006] A feed inlet is opened at the top of the housing, and a discharge outlet is opened at the bottom of the housing. The feed inlet and the discharge outlet are vertically corresponding.

[0007] The shear mechanism is arranged in the housing. The shear mechanism includes a fixed ring, a rotating ring and a plurality of blades;

[0008] The fixed ring is fixedly connected to the housing;

[0009] The rotating ring is coaxially connected to the fixed ring and can rotate relative to the fixed ring;

[0010] The ring holes of the fixed ring and the ring holes of the rotating ring are both vertically corresponding to the feed inlet and the discharge outlet;

[0011] The blades are arranged between the fixed ring and the rotating ring and are respectively attached to the fixed ring and the rotating ring. The blades are hinged to the fixed ring at the edges. Limit pins are arranged on the blades, and limit grooves matching the limit pins are arranged on the rotating ring;

[0012] Driven by the rotating ring, the shearing mechanism can be switched between a first state and a second state; in the first state, all the blades are spliced into a closed plate, and the closed plate closes the ring hole; in the second state, all the blades are tangent to the outer wall of the hole wall of the ring hole.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects:

[0014] For the shearing type air lock provided by the present invention, during feeding, the rotating ring drives the blades to extend outward towards the hole wall, so that the blades are spliced into a closed plate, and the closed plate closes the ring hole of the rotating ring and the ring hole of the fixed ring, and the material falls onto the closed plate; during discharging, the rotating ring rotates back and drives the blades to retract towards the hole wall, and the blades are tangent to the outer wall of the hole walls of the above two ring holes, and the material on the blades can be scraped off by the hole walls, which can effectively reduce the blockage and jamming of the blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural view of a shearing type air lock in an embodiment of the present invention;

[0016] Figure 2 It is a schematic view of the closed state of the shearing mechanism in an embodiment of the present invention;

[0017] Figure 3 It is a schematic view of the open state of the shearing mechanism in an embodiment of the present invention;

[0018] Figure 4 It is a combined schematic view of the rotating ring, the blades and the fixed ring in an embodiment of the present invention;

[0019] Figure 5 It is an exploded view of the shearing mechanism in an embodiment of the present invention;

[0020] Figure 6 It is a bottom view of the blade in an embodiment of the present invention;

[0021] Figure 7 It is a top view of the blade in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] In the present invention, the descriptions involving "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features.

[0025] An embodiment of the present invention provides a shearing mechanism 40 type air lock, as Figure 1 shown, which includes a housing 10 and at least one shearing mechanism 40; a feed inlet 20 is opened at the top of the housing 10, and a discharge outlet 70 is opened at the bottom of the housing 10, and the feed inlet 20 and the discharge outlet 70 are corresponding in the vertical direction; the shearing mechanism 40 is arranged inside the housing 10, as Figure 4 shown, the shearing mechanism 40 includes a fixed ring 42, a rotating ring 44 and a plurality of blades 43; the fixed ring 42 is fixedly connected to the housing 10; the rotating ring 44 is coaxially connected to the fixed ring 42 and can rotate relative to the fixed ring 42; the annular holes of the fixed ring 42 and the rotating ring 44 are both corresponding to the feed inlet 20 and the discharge outlet 70 in the vertical direction; the blades 43 are arranged between the fixed ring 42 and the rotating ring 44 and are respectively in contact with the fixed ring 42 and the rotating ring 44, the blades 43 are hinged to the fixed ring 42 at the edge, a limit pin 431 is arranged on the blade 43, and a limit groove 441 matching with the limit pin 431 is arranged on the rotating ring 44; driven by the rotating ring 44, the shearing mechanism 40 can be switched between a first state and a second state; as Figure 2 shown, in the first state, all the blades 43 are spliced into a closed plate, and the closed plate closes the annular hole; as Figure 3 shown, in the second state, all the blades 43 are tangent to the hole wall of the annular hole.

[0026] The rotating ring 44 can be disposed on the upper surface of the fixed ring 42 or on the lower surface of the fixed ring 42. When the rotating ring 44 is disposed on the upper surface of the fixed ring 42, the diameter of the annular hole of the fixed ring 42 can be set to be larger than the diameter of the annular hole of the rotating ring 44. When the rotating ring 44 is disposed on the lower surface of the fixed ring 42, the diameter of the annular hole of the rotating ring 44 can be set to be larger than the diameter of the annular hole of the fixed ring 42. Of course, the diameters of the two annular holes can also be set to be the same. The blade 43 includes a hinged end and a movable end. The hinged end is hinged to the fixed ring 42, and the movable end can move within the area between the two annular holes. A limit pin 431 is provided on the blade 43, and a limit groove 441 is provided on the rotating ring 44. The first state is the closed state of the shearing mechanism 40. During feeding, the rotating ring 44 rotates, and the blade 43 moves along the path of the limit groove 441 through the limit pin 431. Finally, all the blades 43 form a closed plate, and the closed plate closes the annular hole of the rotating ring 44 and the annular hole of the fixed ring 42, and the material falls onto the closed plate formed by the blades 43. The second state is the open state of the shearing mechanism 40. During discharging, the feeding port 20 is closed, the rotating ring 44 rotates back and drives the blade 43 to retract into the inner wall of the annular hole, the closed plate opens, and the material drops vertically to the discharging port 70. During this process, the inner walls of the two annular holes are both tangent to the outer side of the blade 43. When the rotating ring 44 is disposed on the upper surface of the fixed ring 42, the material on the blade 43 is mainly scraped off by the inner wall of the rotating ring 44. When the rotating ring 44 is disposed on the lower surface of the fixed ring 42, the material on the blade 43 is mainly scraped off by the fixed ring 42, thereby effectively reducing the blockage and jamming of the blade 43.

[0027] Optionally, as Figure 6 and Figure 7 shown, the blade 43 includes a main blade 432 and a secondary blade 433. The edge of the main blade 432 is hinged to the fixed ring 42, and the main blade 432 can move within the annular hole. The secondary blade 433 is disposed at the edge of the main blade 432 near the annular hole and protrudes from the edge of the main blade 432 by a predetermined distance. Two adjacent main blades 432 are in contact at the secondary blade 433 of one of the blades 43. The secondary blade 433 can be disposed on the lower surface of the main blade 432. The secondary blade 433 protrudes from the edge of the main blade 432 and forms a convex platform. Another adjacent main blade 432 is in contact with the convex platform protruding from the secondary blade 433. When the rotating ring 44 rotates, the other adjacent main blade 432 can slide along the convex platform of the secondary blade 433. By providing the secondary blade 433, on the one hand, the sealing performance can be enhanced when the shearing mechanism 40 is closed. On the other hand, the adjacent main blade 432 can be supported by the protruding convex platform, so that the blades 43 are connected to each other, strengthening the stability of the shearing mechanism 40.

[0028] Optionally, as Figure 1 and Figure 5As shown, the fixed ring 42 is close to the feed inlet 20, and the rotating ring 44 is close to the discharge outlet 70; a first sealing ring 41 is covered on the end face of the fixed ring 42 close to the feed inlet 20; a second sealing ring 45 is covered on the end face of the rotating ring 44 close to the discharge outlet 70. By providing two sealing rings, it is possible to prevent materials from adhering to the walls of the fixed ring 42 and the rotating ring 44. During later maintenance, the two sealing rings can be directly disassembled and cleaned.

[0029] Optionally, as Figure 1 shown, the air lock of this embodiment includes a first shearing mechanism and a second shearing mechanism; the first shearing mechanism is close to the feed inlet 20, and the second shearing mechanism is close to the discharge outlet 70; the space between the first shearing mechanism and the feed inlet 20 is the feed bin 30; the space between the first shearing mechanism and the second shearing mechanism is the storage bin 50; the space between the second shearing mechanism and the discharge outlet 70 is the discharge bin 60. During feeding, the first shearing mechanism is closed, and the material enters from the feed inlet 20 and falls onto the blades 43 of the first shearing mechanism, that is, the material enters the feed bin 30; the second shearing mechanism is closed, the first shearing mechanism is opened, and the material in the bin falls from the feed bin 30 onto the blades 43 of the second shearing mechanism, that is, the material enters the storage bin 50; the first shearing mechanism is closed to isolate the air flow between the feed bin 30 and the storage bin 50, the second shearing mechanism is opened, and the material drops vertically into the discharge bin 60 and is finally discharged from the discharge outlet 70 to complete the discharging process.

[0030] Optionally, as Figure 2 and Figure 3 shown, the rotating ring 44 is connected with a driving mechanism, and the driving mechanism includes a driving part 81 and a connecting rod part 82; the driving part 81 includes a driving part body and a telescopic end, the driving part body is arranged in the housing 10, and the telescopic end is connected with the connecting rod part 82; the connecting rod part 82 includes a first hinged end, a second hinged end and a third hinged end; the first hinged end is hinged to the housing 10, the second hinged end is hinged to the telescopic end of the driving part 81, and the third hinged end is hinged to the rotating ring 44. The connecting rod part 82 is respectively hinged to the driving part 81, the rotating ring 44 and the housing 10. The driving part 81 pushes the connecting rod part 82, and the connecting rod part 82 pushes the rotating ring 44 to rotate, realizing the closing and opening of the shearing mechanism 40. A connecting rod fixing seat can be arranged in the housing 10, and the first end of the connecting rod is hinged to the connecting rod fixing seat. Alternatively, a driving part fixing seat can be arranged on the housing 10, and the driving part body is hinged to the driving part fixing seat. The driving part 81 can be a cylinder or a hydraulic cylinder.

[0031] The specific embodiments of the present invention described above do not constitute a limitation to the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A shearing air lock, characterized in that, It includes a housing and at least one shearing mechanism, and the shearing mechanism includes a first shearing mechanism and a second shearing mechanism; There is a feed inlet at the top of the housing, and a discharge outlet at the bottom of the housing. The feed inlet and the discharge outlet are vertically corresponding; The shearing mechanism is arranged inside the housing, and the shearing mechanism includes a fixed ring, a rotating ring and a plurality of blades; The fixed ring is fixedly connected to the housing; The rotating ring is coaxially connected to the fixed ring and can rotate relative to the fixed ring; The ring holes of the fixed ring and the rotating ring are both vertically corresponding to the feed inlet and the discharge outlet; The blades are arranged between the fixed ring and the rotating ring, and are respectively in contact with the fixed ring and the rotating ring. The blades are hinged to the fixed ring at the edges, and there are limit pins on the blades, and there are limit grooves on the rotating ring that match the limit pins. The blades include main blades and sub - blades; the edges of the main blades are hinged to the fixed ring, and the main blades can move within the ring holes; the sub - blades are arranged at the edges of the main blades close to the ring holes and protrude a predetermined distance from the edges of the main blades; two adjacent main blades are in contact at the sub - blades of one of the blades; Driven by the rotating ring, the shearing mechanism can switch between a first state and a second state; In the first state, all the blades are spliced into a closed plate, and the closed plate closes the ring hole; in the second state, all the blades are tangent to the hole wall of the ring hole; The first shearing mechanism is close to the feed inlet, and the second shearing mechanism is close to the discharge outlet; the space between the first shearing mechanism and the feed inlet is the feed bin; the space between the first shearing mechanism and the second shearing mechanism is the storage bin; the space between the second shearing mechanism and the discharge outlet is the discharge bin.

2. The airlock of the shear type according to claim 1, wherein The fixed ring is close to the feed inlet, and the rotating ring is close to the discharge outlet; A first sealing ring is covered on the end face of the fixed ring close to the feed inlet; A second sealing ring is covered on the end face of the rotating ring close to the discharge outlet.

3. A shearing air lock according to claim 1, wherein The rotating ring is connected with a driving mechanism, and the driving mechanism includes a driving part and a connecting rod part; The driving part includes a driving part body and a telescopic end. The driving part body is arranged inside the housing, and the telescopic end is connected to the connecting rod part; The connecting rod part includes a first hinged end, a second hinged end and a third hinged end; the first hinged end is hinged to the housing, the second hinged end is hinged to the telescopic end of the driving part, and the third hinged end is hinged to the rotating ring.

4. A shearing air lock according to claim 3, characterized in that The driving part is a cylinder or a hydraulic cylinder.

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