A reversing device for a coke silo wall-mounted screw chute

Abstract

This invention relates to a reversing device for a spiral chute attached to the wall of a coke silo, comprising a drive unit, an embedded bearing, a cantilever shaft, a straight chute section, and a curved chute section. The drive unit is fixed to the outside of the coke silo wall. A shaft hole is formed in the coke silo wall, and one end of the cantilever shaft extends from the shaft hole to connect to the drive unit. An embedded bearing is provided between the shaft hole and the cantilever shaft. The end of the cantilever shaft extending into the coke silo connects to the straight chute section and the curved chute section. Driven by the drive unit, the straight chute section and the curved chute section can rotate around the axis with the cantilever shaft. The reversing device of this invention is used to realize the path switching when coke is conveyed downward along the spiral chute, and the action is precise and smooth, which can effectively avoid impact and splashing during reversal and reduce the coke breakage rate.

Description

Technical Field

[0001] This invention relates to the field of coke transfer technology, and in particular to a reversing device for a coke silo wall-mounted spiral chute. Background Technology

[0002] In the coking industry, with the trend towards larger coke ovens, increasingly stringent environmental requirements, and limitations on industrial land use, large-capacity silos have become the preferred choice for storing coke. The large diameter and height of these silos present a significant challenge for coke transport and storage: preventing the coke from breaking upon impact from heights.

[0003] Coke has good wear resistance and compressive strength, but poor impact resistance. The breakage rate of coke directly affects its final application and the economic benefits for enterprises. As the volume of coke storage silos increases, their height also increases. Currently, based on the physical characteristics of coke, various methods have been developed to prevent coke breakage during high-altitude falls. These include using vertically installed spiral chutes in coke silos, and spiral chutes installed along the side walls of coke silos for loading. The coke is loaded from the top of the spiral chutes and slides and rolls along the rotating chutes to the bottom of the coke silo, effectively reducing breakage during loading.

[0004] When using vertically installed spiral chutes in coke silos, the large diameter of the silos results in a long rolling distance for the coke as it is distributed from the center to the side walls, leading to low utilization of the effective volume and increased relative coke breakage. However, using spiral chutes along the side walls of the coke silos, which distribute the coke from the side walls to the center, improves the utilization of the effective volume and reduces the relative coke breakage. Therefore, wall-mounted spiral chutes are more suitable for large-capacity coke silos. However, conventional wall-mounted spiral chutes are usually arranged in a unidirectional manner, resulting in a small area of ​​low-level coke drop points and a large rolling range, which can easily cause uneven distribution of coke into the silo.

[0005] The main problems with existing coke silos using a single wall-mounted spiral chute include: 1) The low-level material drop point in the coke silo is singular, which easily leads to material deviation after loading. 2) The drop difference of coke falling along the wall-mounted spiral chute in the coke silo is too large, which easily results in a long rolling distance of coke and an increased coke breakage rate.

[0006] If multiple wall-mounted spiral chutes are used and their directions are reversed, coke can be fed at multiple points as needed. However, a chute reversing device needs to be added because the wall-mounted spiral chutes in conventional coke silos all adopt a concave open structure. When reversing, the coke will be impacted and splashed, increasing the breakage rate of the coke. Summary of the Invention

[0007] This invention provides a reversing device for a spiral chute attached to the wall of a coke silo, which is used to switch the path when coke is conveyed downward along the spiral chute. The action is precise and smooth, which can effectively avoid impact and splashing during reversal and reduce the coke breakage rate.

[0008] To achieve the above objectives, the present invention employs the following technical solution:

[0009] A reversing device for a spiral chute attached to the wall of a coke silo includes a drive unit, an embedded bearing, a cantilever shaft, a straight chute section, and a curved chute section. The drive unit is fixed to the outside of the coke silo wall. A shaft hole is formed in the coke silo wall, and one end of the cantilever shaft extends out of the shaft hole and connects to the drive unit. An embedded bearing is provided between the shaft hole and the cantilever shaft. One end of the cantilever shaft extending into the coke silo connects to the straight chute section and the curved chute section. Under the drive of the drive unit, the straight chute section and the curved chute section can rotate around the axis with the cantilever shaft.

[0010] The drive unit consists of a motor and a reducer.

[0011] A steel pipe is pre-embedded in the shaft hole of the silo wall, and an embedded bearing is placed between the steel pipe and the cantilever shaft.

[0012] The cantilever shaft is fitted with a bushing at one end that extends into the coke silo, and the bushing is fixedly connected to the cantilever shaft; the straight chute section and the curved chute section are fixedly connected to the bushing through multiple stiffeners to form a rotating body.

[0013] The inner side of the straight chute section near the silo wall is flush with the inner side of the curved chute section, and the outer side of the straight chute section away from the silo wall is flush with the outer side of the curved chute section; the inner side of the rotating body is sealed by a wear-resistant sealing cover.

[0014] The rotating body is spaced apart from the silo wall by a distance, and the resulting space is sealed by a sealing baffle arranged circumferentially.

[0015] A reversing device for a spiral chute attached to the wall of a coke silo also includes a limit switch, which is located between the reversing device and the silo wall and is fixed to the silo wall; the limit switch is interlocked with the drive device through a control system.

[0016] The straight chute section has a U-shaped cross-section, and the inner surface of the straight chute section is provided with a wear-resistant lining plate.

[0017] The curved chute section is parabolic in shape and is a closed channel structure with a U-shaped cross-section; the inner surface of the curved chute section is lined with wear-resistant plates.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1) For coke silos equipped with wall-mounted spiral chutes consisting of multiple branch chutes, reversing devices need to be installed at each intersection of the branch chutes to change the falling path of the coke. The reversing device described in this invention can ensure the effectiveness of the wall-mounted spiral chutes, ensure that the low-level material drop points are evenly distributed along the circumference of the coke silo, and avoid material deviation after loading. At the same time, it ensures that the drop difference of coke when it is discharged along the wall-mounted spiral chutes is within a reasonable range, shortens the rolling distance of the coke, and reduces the coke breakage rate.

[0020] 2) The reversing device described in this invention can realize the path switching when coke is conveyed downward along the spiral chute, and the action is precise and smooth, which can effectively avoid impact and splashing during reversal and reduce the coke breakage rate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the coke silo described in this invention.

[0022] Figure 2 This is a front cross-sectional view of the commutation device described in this invention.

[0023] Figure 3 This is a schematic diagram of the working state of the commutation device described in this invention. Figure 1 .

[0024] Figure 4 This is a schematic diagram of the working state of the commutation device described in this invention. Figure 2 .

[0025] In the diagram: 1. Coke silo 2. Spiral chute 3. Reversing device 31. Drive device 32. Embedded bearing 33. Cantilever shaft 34. Straight chute section 35. Curved chute section 36. Rib 37. Wear-resistant sealing cover 38. Sealing baffle 39. Wear-resistant liner 4. Limit switch 5. Upstream chute section 61. Downstream chute section one 62. Downstream chute section two Detailed Implementation

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0027] like Figure 1 As shown, "A coke silo with a hanging spiral chute" (patent filed on the same day) includes a coke silo 1 and spiral chute 2 arranged along the wall of the coke silo 1; the coke silo 1 is provided with several sets of spiral chute 2 along the circumference, and each set of spiral chute 2 is composed of multiple branch chutes; each branch chute is spiral curved; the multiple branch chutes in the same set have a multi-layer herringbone structure, the top of the uppermost branch chute is provided with a coke loading port, and the top inlet end of the remaining branch chutes is respectively connected to the nearest branch chute above, and a reversing device 3 is provided at the connection point; the bottom outlet end of each branch chute is evenly distributed along the circumference of the coke silo 1.

[0028] like Figure 3 , Figure 4 As shown, the above-mentioned method for distributing coke in a coke silo with a wall-mounted spiral chute is as follows: Coke enters the first branch chute and slides downwards, reaching the reversing device 3 via the upstream chute section 5; if no reversal is required, the straight chute section 34 of the reversing device 3 is connected between the upstream chute section 5 and the downstream chute section 61, and the coke moves along the curved trajectory of the original branch chute; if a reversal is required, the control system controls the drive device of the reversing device to start, and after rotation, the curved chute section 35 is connected between the upstream chute section 5 and the downstream chute section 62. The limit switch 4 is used to position the curved chute section 35 to ensure that it is aligned with the upstream chute section 5 and the downstream chute section 62. After entering the curved chute section 35, the coke enters the second branch chute in a parabolic trajectory; according to the distribution of coke in the coke silo 1, the coke is controlled to descend along different branch chutes to ensure that the coke is evenly distributed around the circumference of the coke silo 1 after distribution.

[0029] The reversing device for the wall-mounted spiral chute of a coke silo described in this invention is a supporting device for the aforementioned "coke silo equipped with a wall-mounted spiral chute," used to realize path switching between different branch chutes when coke is conveyed along the spiral chute. Figure 2 As shown, the reversing device 3 includes a drive device 31, an embedded bearing 32, a cantilever shaft 33, a straight chute section 34, and a curved chute section 35. The drive device 31 is fixed to the outside of the coke silo 1 wall. A shaft hole is opened on the wall of the coke silo 1, and one end of the cantilever shaft 33 extends out of the shaft hole and connects to the drive device 31. An embedded bearing 32 is provided between the shaft hole and the cantilever shaft 33. One end of the cantilever shaft 33 extending into the coke silo 1 is connected to the straight chute section 34 and the curved chute section 35. Under the drive of the drive device 31, the straight chute section 34 and the curved chute section 35 can rotate around the axis with the cantilever shaft 33.

[0030] The drive unit 31 consists of a motor and a reducer.

[0031] A steel pipe is pre-embedded in the shaft hole of the silo wall, and an embedded bearing 32 is located between the steel pipe and the cantilever shaft 33.

[0032] The cantilever shaft 33 has a bushing at one end that extends into the coke silo 1, and the bushing is fixedly connected to the cantilever shaft 33; the straight chute section 34 and the curved chute section 35 are fixedly connected to the bushing through multiple stiffeners 36 to form a rotating body.

[0033] The inner side of the straight chute section 34 near the bin wall is flush with the inner side of the curved chute section 35, and the outer side of the straight chute section 34 away from the bin wall is flush with the outer side of the curved chute section 35; the inner side of the rotating body is sealed by the wear-resistant sealing cover 37.

[0034] The rotating body is spaced apart from the silo wall by a distance, and the resulting space is sealed by a sealing baffle 38 arranged circumferentially.

[0035] The reversing device of the spiral chute hanging on the wall of a coke silo according to the present invention further includes a limit switch 4, which is located between the reversing device 3 and the silo wall and is fixed on the silo wall; the limit switch 4 is interlocked with the drive device 31 through the control system.

[0036] The straight chute section 34 has a U-shaped cross-section, and the inner surface of the straight chute section 34 is provided with a wear-resistant liner 39.

[0037] The curved chute section 35 is parabolic in shape and is a closed channel structure with a U-shaped cross-section; the inner surface of the curved chute section 35 is provided with a wear-resistant liner 39.

[0038] The reversing device 3 described in this invention is a rotary reversing device; the center of the reversing device 3 is provided with a cantilever shaft 33 connected to the drive device 31, and the two sides of the reversing device 3 are respectively provided with a straight chute section 34 and a curved chute section 35; wherein the straight chute section 34 is used to connect the same branch chute, and the curved chute section 35 is used to connect two intersecting branch chutes.

[0039] The first branch chute, connected by a straight chute section 34, has an upstream chute section 5 upstream of the reversing device 3 and a downstream chute section 61 downstream of the reversing device 3. The second branch chute, connected to the first branch chute by a curved chute section 35, has a downstream chute section 62 downstream of the reversing device 3. The reversing device 3 is installed at the break between the upstream chute section 5 and the downstream chute section 61 of the first branch chute. The straight chute section 34 in the reversing device 3 can smoothly connect the upstream chute section 5 and the downstream chute section 61, connecting the first branch chute into a whole spiral-shaped chute. The top of the second branch chute, connected to the first branch chute, is close to the reversing device 3 and can be connected to the curved chute section 35 in the reversing device 3 through the downstream chute section 62. At this time, the coke conveyed by the first branch chute enters the second branch chute after passing through the reversing device 3 and continues to be conveyed downward. Similarly, during the subsequent conveying process, the coke can also enter the third branch chute, the fourth branch chute, etc. through the reversing device 3, thereby realizing the flexible distribution of the coke when it is conveyed along the spiral chute, and thus ensuring that the coke drop point is evenly distributed in the coke silo 1.

[0040] In the reversing device 3, the drive device 31 drives the rotating body to rotate, moving the straight chute section 34 and the curved chute section 35 to corresponding positions to switch the coke conveying direction. When the reversing device 3 operates, the rotation angle is controlled by the limit switch 4 interlocked with the drive device 31 to ensure that after reversing, the inlet of the curved chute section 35 is aligned with the outlet of the upstream chute section 5, and the outlet of the curved chute section 35 is aligned with the inlet of the downstream chute section 62. After the coke enters the curved chute section 35 (a closed structure with openings at both ends) of the reversing device 3, it is first thrown upwards, then tumbles in the chute, and finally enters the next branch chute.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A reversing device for a wall-mounted screw chute of a coke silo, characterized in that, The system includes a drive unit, an embedded bearing, a cantilever shaft, a straight chute section, and a curved chute section. The drive unit is fixed to the outside of the coke silo wall. A shaft hole is formed in the coke silo wall, and one end of the cantilever shaft extends from the shaft hole to connect to the drive unit. An embedded bearing is provided between the shaft hole and the cantilever shaft. The end of the cantilever shaft extending into the coke silo connects to the straight chute section and the curved chute section. Under the drive of the drive unit, the straight chute section and the curved chute section can rotate around the axis with the cantilever shaft. The straight chute section has a U-shaped cross-section, and the inner surface of the straight chute section is lined with a wear-resistant liner. The curved chute section is parabolic in shape and is a closed channel structure with a U-shaped cross-section. The inner surface of the curved chute section is lined with a wear-resistant liner. A first branch connects to the straight chute section. An upstream chute section is provided upstream of the reversing device, and a downstream chute section one is provided downstream of the reversing device. A second branch chute, which connects to the first branch chute via a curved chute section, is provided downstream of the reversing device as a second downstream chute section. A reversing device is installed at the break between the upstream chute section and the downstream chute section one of the first branch chute. The straight chute section in the reversing device can smoothly connect the upstream chute section and the downstream chute section one, connecting the first branch chute into a whole spiral-shaped chute. The top of the second branch chute, which is connected to the first branch chute, is close to the reversing device and can be connected to the curved chute section in the reversing device via the downstream chute section two. At this time, the coke conveyed by the first branch chute enters the second branch chute after passing through the reversing device and continues to be conveyed downward.

2. The reversing device for a coke silo wall-mounted spiral chute according to claim 1, characterized in that, The drive unit consists of a motor and a reducer.

3. The reversing device for a coke silo wall-mounted spiral chute according to claim 1, characterized in that, A steel pipe is pre-embedded in the shaft hole of the silo wall, and an embedded bearing is placed between the steel pipe and the cantilever shaft.

4. The reversing device for a coke silo wall-mounted spiral chute according to claim 1, characterized in that, The cantilever shaft is fitted with a bushing at one end that extends into the coke silo, and the bushing is fixedly connected to the cantilever shaft; the straight chute section and the curved chute section are fixedly connected to the bushing through multiple stiffeners to form a rotating body.

5. The reversing device for a coke silo wall-mounted spiral chute according to claim 4, characterized in that, The inner side of the straight chute section near the silo wall is flush with the inner side of the curved chute section, and the outer side of the straight chute section away from the silo wall is flush with the outer side of the curved chute section; the inner side of the rotating body is sealed by a wear-resistant sealing cover.

6. The reversing device for a coke silo wall-mounted spiral chute according to claim 4, characterized in that, The rotating body is spaced apart from the silo wall by a distance, and the resulting space is sealed by a sealing baffle arranged circumferentially.

7. The reversing device for a coke silo wall-mounted spiral chute according to claim 1, characterized in that, It also includes limit switches, which are located between the reversing device and the bin wall and are fixed to the bin wall; the limit switches are interlocked with the drive device through the control system.

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