Anti-bridging feeding method and device

Abstract

The present invention relates to the technical field of material conveying mechanisms, and in particular to an anti-bridging feeding method and device. The anti-bridging feeding device comprises a feeding pipeline (10), wherein the vertical section of the feeding pipeline (10) has a reduced diameter portion (11) at the connection with the adjacent mechanism, and a movable intercepting portion (20) is provided on the feeding pipeline (10). The movable intercepting portion (20) intermittently moves back and forth under the action of an external power (30) so as to achieve intermittent unblocking or closing of the feeding pipeline (10); and a hanging portion (40) is provided on the movable intercepting portion (20), which extends to the reduced diameter portion (11). The hanging portion (40) moves accordingly with the back and forth movement of the movable intercepting portion (20). The method and device provided by the present invention can reduce the probability of silo blockage and bridging, while also ensuring the feeding speed of the material.

Description

Technical Field

[0001] The present invention relates to the technical field of material conveying mechanisms, and in particular to an anti-bridging feeding method and device. Background Art

[0002] In some process flows, the objects to be processed are usually transported through a silo by a conveying mechanism to a subsequent processing device. The upper section of the silo is generally straight cylindrical, and the lower section of the silo is generally in the shape of a gradually shrinking cone. During the use of the silo, there will be a problem of material bridging. Specifically, the continuously flowing material continuously enters the interior of the silo, and the friction between the materials and between the materials and the inner wall increases, which reduces the fluidity of the materials. In addition, the lower section of the silo is in the shape of a gradually shrinking cone, and the materials are easily stuck in the lower section of the silo and the discharge port, resulting in the phenomenon of material bridging and blockage. Once the material bridges in the lower section of the silo, the material in the silo will not continue to flow downward, and the silo cannot be discharged, affecting the efficiency of the material conveying operation.

[0003] Chinese patent document CN207698452U discloses a reciprocating arch-breaking machine for removing the arching phenomenon in the coal hopper. The arch-breaking machine is arranged above the coal hopper, and includes an electric motor, a reciprocating machine, an arch-breaking rod and an arch-breaking support rod. One end of the arch-breaking rod is vertically arranged in the reciprocating machine, and the other end is vertically inserted into the coal hopper. The arch-breaking support rods are evenly welded around the arch-breaking rod at an angle upward. During operation, the electric motor drives the reciprocating machine, and the reciprocating machine drives the arch-breaking rod to fluctuate up and down, and the arch-breaking support rods also fluctuate continuously, thereby applying a disturbing force to the arched middle part in the coal hopper. Chinese patent document CN213678207U discloses a multi-combination arch-breaking silo, whose silo body includes a straight cylindrical part and a duckbill-shaped discharge part, and the duckbill-shaped discharge part is provided with a first arch-breaking shaft and a second arch-breaking shaft. Although both of the above two solutions have good arch-breaking effects, the arch-breaking rod, arch-breaking support rod, first arch-breaking axis and second arch-breaking axis form an obstruction to the feed port, which will have an adverse effect on the discharge speed. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects of the prior art and provide an anti-bridging feeding method, which can reduce the adverse effects on the discharge speed while achieving the anti-bridging effect.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an anti-bridging feeding method, comprising a feeding pipeline, wherein the vertical section of the feeding pipeline has a reduced diameter portion at the connection with the adjacent mechanism, and a movable intercepting portion is provided on the feeding pipeline, and the movable intercepting portion intermittently moves back and forth under the action of external power so that the material passage of the feeding pipeline is intermittently unblocked or closed; after the movable intercepting portion that makes the material passage in a closed state intercepts a certain amount of material, the movable intercepting portion moves so that the material accumulated on the movable intercepting portion falls to the reduced diameter portion at one time, and then the movable intercepting portion moves back and forth so that the material passage is closed again, and so on; a hanging portion is provided on the movable intercepting portion, and the hanging portion moves back and forth with the movable intercepting portion so that the hanging portion can move laterally in the reduced diameter portion to prevent the material from arching.

[0006] The inventive concept of this application is:

[0007] This application achieves the technical objectives through two means: First, the feeding mode is changed from continuous feeding to intermittent feeding. Specifically, the material is intercepted by a movable intercepting portion. After a certain amount of material accumulates on the movable intercepting portion, the material is dropped into the reduced diameter portion all at once. This method of dropping increases the weight of the material dropped at one time, which can reduce the probability of bridging. Second, a hanging portion is added to the movable intercepting portion. The hanging portion moves laterally with the movable intercepting portion at regular intervals to prevent bridging in the reduced diameter portion and accelerate the drop of the material.

[0008] Furthermore, the distance between the movable intercepting portion and the top of the diameter-reducing portion is 0.5-3 times the height of the diameter-reducing portion.

[0009] Furthermore, the external power is an oil cylinder arranged in the feed pipeline.

[0010] The present invention also provides an anti-bridging feeding device, including a feeding pipeline, wherein the vertical section of the feeding pipeline has a reduced diameter portion at the connection with the adjacent mechanism, and a movable intercepting portion is provided on the feeding pipeline, and the movable intercepting portion intermittently moves back and forth under the action of external power to achieve intermittent unblocking or closing of the feeding pipeline; a hanging portion is provided on the movable intercepting portion, and the hanging portion extends to the reduced diameter portion, and the hanging portion moves accordingly with the back and forth movement of the movable intercepting portion.

[0011] Furthermore, the movable intercepting portion is in a sheet shape, and an intercepting portion opening is provided on the feed pipeline for the movable intercepting portion to enter and exit the feed pipeline.

[0012] Furthermore, a sealing member is provided on the opening of the interception portion, and the provision of the sealing member can avoid the problem of material leakage.

[0013] Furthermore, the movable intercepting portion is a gate valve.

[0014] Furthermore, the hanging portion is in a rake-teeth shape.

[0015] Furthermore, the hanging portion is in a chain shape so that the hanging portion can swing along with the movement of the movable intercepting portion.

[0016] Furthermore, the adjacent mechanism is a screw conveying shaft, the bottom of the reduced diameter portion is communicated with the feed port of the screw conveying shaft, and the material is conveyed to a subsequent processing device through the screw conveying shaft.

[0017] In summary, the method and device provided by the present invention can reduce the probability of silo blockage and bridging, while also ensuring the feeding speed of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of Example 1 of the present invention;

[0019] Figure 2 This is a schematic structural diagram of Example 2 of the present invention;

[0020] In the figure: 10, feed pipe; 11, reduced diameter portion; 12, interception portion opening; 13, sealing member; 20, movable interception portion; 30, external power; 40, hanging portion; 50, adjacent mechanism. DETAILED DESCRIPTION

[0021] Example 1

[0022] like Figure 1 As shown, the anti-bridging feed device of the present invention comprises a feed pipeline 10, with a vertical upper section and a reduced diameter portion 11 at the bottom. A movable retaining portion 20, in the form of a gate valve, is provided on the feed pipeline 10. The distance between the movable retaining portion 20 and the top of the reduced diameter portion 11 is 0.5-1 times the height of the reduced diameter portion 11. A hydraulic cylinder is provided in the feed pipeline 10 to power the movable retaining portion.

[0023] Working Principle: Under the action of an external hydraulic cylinder 30, the movable intercepting portion 20 periodically moves back and forth, intermittently opening or closing the feed pipeline 10. The closing time of the feed pipeline 10 is adjusted by the material feed rate. After the movable intercepting portion 20, which has closed the material passage, intercepts a certain amount of material, the movable intercepting portion 20 moves rapidly, causing the accumulated material on the movable intercepting portion 20 to fall toward the reduced diameter portion 11 at once. The movable intercepting portion 20 then moves back, closing the material passage again, and so on. The movable intercepting portion 20 is provided with a chain-like hanging portion 40 extending to the reduced diameter portion 11. The hanging portion 40 moves back and forth with the movable intercepting portion 20, allowing the hanging portion 40 to move laterally within the reduced diameter portion 11, thereby preventing the material from arching. The bottom of the reduced diameter portion 11 of the feed pipeline 10 is connected to an adjacent mechanism 50, which is a screw conveyor shaft. The screw conveyor shaft conveys the material to the subsequent processing device.

[0024] Example 2

[0025] like Figure 2 As shown, the difference between this embodiment and embodiment 1 is that:

[0026] 1. The movable intercepting portion 20 is in sheet shape, and the feed pipe 10 is further provided with an intercepting portion opening 12 for the movable intercepting portion 20 to enter and exit the feed pipe 10. A sealing member 13 is provided on the intercepting portion opening 12 to prevent leakage.

[0027] 2. When the distance between the movable intercepting portion 20 and the top of the reduced diameter portion 11 is 1-3 times the height of the reduced diameter portion 11, if the hanging portion 40 is designed as a chain, the excessive length of the chain will result in too small a lateral swing amplitude of the chain, thereby reducing the stirring effect of the hanging portion 40 on the material. The hanging portion 40 is rake-tooth-shaped. Compared with the chain design, the rake-tooth-shaped hanging portion 40 is not limited in length and can be inserted into the material, penetrating deeply into the material to disperse the material.

Claims

1. An anti-bridging feeding method for an anti-bridging feeding device, the device comprising a feeding pipeline (10), wherein a vertical section of the feeding pipeline (10) has a reduced diameter portion (11) at a connection with an adjacent mechanism, and wherein: A movable intercepting portion (20) is provided on the feed pipe (10). The movable intercepting portion (20) intermittently moves back and forth under the action of an external power (30) so that the material passage of the feed pipe (10) is intermittently unblocked or closed. After the movable intercepting portion (20) in the closed state intercepts a certain amount of material, the movable intercepting portion (20) moves so that the material accumulated on the movable intercepting portion (20) falls toward the diameter reduction portion (11) at one time. Thereafter, the movable intercepting portion (20) moves back and forth so that the material passage is closed again, and so on. A hanging portion (40) is provided on the movable intercepting portion (20). The hanging portion (40) moves laterally in the diameter reduction portion (11) as the movable intercepting portion (20) moves back and forth so as to prevent the material from arching.

2. The anti-bridging feeding method according to claim 1, wherein: The length of the movable intercepting portion (20) from the top of the diameter-reducing portion (11) is 0.5-3 times the height of the diameter-reducing portion (11).

3. The anti-bridging feeding method according to claim 1, characterized in that: The external power (30) is an oil cylinder provided on the feed pipeline (10).

4. An anti-bridging feeding device for implementing the method according to claim 1, comprising a feeding pipeline (10), wherein the vertical section of the feeding pipeline (10) has a reduced diameter portion (11) at the connection with the adjacent mechanism (50), characterized in that: The feed pipe (10) is provided with a movable intercepting portion (20), which intermittently moves back and forth under the action of an external power (30) so as to intermittently open or close the feed pipe (10); the movable intercepting portion (20) is provided with a hanging portion (40), which extends to the reduced diameter portion (11), and the hanging portion (40) moves accordingly with the back and forth movement of the movable intercepting portion (20).

5. The anti-bridging feeding device according to claim 4, characterized in that: The movable intercepting portion (20) is in the shape of a sheet, and a intercepting portion opening (12) is provided on the feed pipeline (10) for the movable intercepting portion (20) to enter and exit the feed pipeline (10).

6. The anti-bridging feeding device according to claim 5, characterized in that: A sealing member (13) is provided on the interception portion opening (12).

7. The anti-bridging feeding device according to claim 4, characterized in that: The movable intercepting portion (20) is a plug-in valve.

8. The anti-bridging feeding device according to claim 4, characterized in that: The hanging portion (40) is in the shape of rake teeth.

9. The anti-bridging feeding device according to claim 4, characterized in that: The hanging portion (40) is chain-shaped so that the hanging portion (40) can swing along with the movement of the movable intercepting portion (20).

10. The anti-bridging feeding device according to claim 4, characterized in that: The adjacent mechanism (50) is a screw conveying shaft, and the bottom of the reduced diameter portion (11) is connected to the feed port of the screw conveying shaft.

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