Spiral conveyor for cement clinker

Abstract

The invention discloses a cement clinker spiral conveyor which comprises a walking mechanism, a rotating tower, a horizontal arm, a vertical arm and a spiral conveying module, a tower body is arranged above the walking mechanism, the rotating tower is arranged at the top of the tower body, the horizontal arm is installed on the rotating tower in a swinging mode, the horizontal arm is provided with a horizontal conveying cavity, and the vertical arm is arranged in the horizontal conveying cavity. The horizontal conveying cavity is provided with a horizontal spiral shaft; a horizontal driving device for driving the horizontal spiral shaft to rotate is arranged at the rear end of the horizontal arm, the vertical arm is installed at the tail section position of the horizontal arm in a swinging mode, the vertical arm is provided with a vertical spiral shaft, and a vertical driving device for driving the vertical spiral shaft to rotate is arranged at the rear end of the vertical arm. The spiral conveying module comprises an outer pipeline, an inner pipeline and a plurality of multi-curved-surface blades integrally extending from the inner pipeline, the outer pipeline is provided with a magnetic induction coil, a permanent magnet is integrally formed in the inner pipeline, the outer pipeline and the inner pipeline are made of non-magnetic materials, and the multiple multi-curved-surface blades extend in the axis direction and define a shaft avoiding groove.

Description

Technical Field

[0001] The invention relates to the field of ship unloading equipment, in particular to a screw conveyor for cement clinker. Background Art

[0002] A ship unloader utilizes a continuous conveying mechanism to create a head capable of lifting bulk materials. It can also be equipped with self-retrieving capabilities or equipped with retrieving and feeding devices. This allows the bulk materials to be continuously lifted from the ship's hold and then unloaded onto a boom or frame for transport to the shore's main conveyor system. Using a ship unloader significantly improves unloading efficiency, minimizes dust pollution, and maintains a clean environment, resulting in high efficiency and environmental protection.

[0003] Existing screw conveyors generally use a vertical screw conveying device in conjunction with a horizontal conveying device to achieve conveying. However, in the actual cement clinker conveying process, material accumulation problems may occasionally occur, which in turn causes the screw conveyor to jam. The main factor is that the spiral resistance of the material in a certain section of the conveying pipeline is too large, which in turn affects the speed of the screw. Therefore, a drive chute is generally equipped at the end section and combined with a negative pressure fan to achieve conveying.

[0004] Cement clinker is a semi-finished product obtained by mixing limestone, clay and iron raw materials into raw materials in appropriate proportions, burning them until they are partially or completely melted, and cooling them. Therefore, cement clinker is composed of lumps of different sizes and accompanied by powder.

[0005] Therefore, the driving chute cannot realize the transportation of cement clinker. However, in the actual final section and horizontal section of the spiral conveyor, powdered cement clinker will appear, causing the block structure to slip, thereby affecting the transportation. If a fan is used, it will cause a lot of external dust, causing environmental pollution. Summary of the Invention

[0006] The main purpose of the present invention is to propose a screw conveyor for cement clinker, which aims to adopt a spiral conveying structure in combination with a shaftless impeller drive to reduce material accumulation and ensure stable conveying. It can further reduce bag replacement or even eliminate the need for bags, thereby improving production stability.

[0007] To achieve the above object, the present invention provides a screw conveyor for cement clinker, comprising: A walking mechanism, wherein a tower body is provided above the walking mechanism, A rotating tower, which is arranged at the top of the tower body; The horizontal arm is swingably mounted on the rotating tower, and the horizontal arm is provided with a horizontal conveying cavity, and the horizontal conveying cavity is provided with a horizontal spiral shaft. The rotating tower controls the swing of the front end of the horizontal arm through a first hydraulic rod, and the rotating tower is provided with a rotating drive assembly to drive the horizontal arm to rotate along its axis; The rear end of the horizontal arm is provided with a horizontal driving device for driving the horizontal screw shaft to rotate; A vertical arm, the vertical arm being swingably mounted at the end of the horizontal arm, the vertical arm being provided with a vertical screw shaft, and a vertical driving device for driving the vertical screw shaft to rotate being provided at the rear end of the vertical arm; The end section of the vertical arm is also provided with a material taking head, and the end section of the vertical arm is provided with a material taking rotating device for driving the material taking head to rotate; The horizontal arm is provided with a horizontal feed inlet and a horizontal discharge port, and the vertical arm is provided with a vertical feed inlet and a vertical discharge port; The horizontal discharge port is connected to a driving chute; The spiral conveying module includes an outer pipe, an inner pipe, and multi-curved blades extending from the inner pipe. The outer pipe is provided with a magnetic induction coil 24, and the inner pipe is integrally formed with a permanent magnet. The outer pipe and the inner pipe are made of non-magnetic materials. The multi-curved blades are provided in plurality and extend in the axial direction to form an axis-avoiding groove. The spiral conveying module includes a first spiral conveying module and a second spiral conveying module; The horizontal arm is composed of multiple sections of horizontal pipes, and the first spiral conveying modules are arranged between adjacent horizontal pipes. The horizontal pipes are connected to the horizontal pipes through screws or first couplings. The horizontal spiral shaft is provided with a smooth section at the position of the first spiral conveying module, and the smooth section is arranged at the position of the shaft avoidance groove; The driving chute is composed of multiple sections of trough pipes, and adjacent trough pipes are connected by a second spiral conveying module.

[0008] Technical effects of the present invention: 1. The embedded spiral conveying module can effectively increase the fluid pressure and avoid the accumulation of single mechanical conveying, which causes the problem of increased resistance of some sections of the spiral shaft; 2. The design of the multi-curved blades (i.e., the inner spiral structure) can not only meet the requirements of imitating spiral conveying of cement clinker (the multi-curved blades are provided in plurality and spaced apart along the inner pipe body, wherein the multi-curved surfaces are wavy blades extending along the inner pipe), but also can form a predetermined flow pressure, thereby achieving imitating spiral conveying while increasing the flow rate in the pipe, and can also perform spiral conveying of cement clinker; 3. Although the spiral conveying module has a simple structure, it can transport horizontal pipelines in sections, thereby reducing the high transportation costs of large machinery. At the same time, it also serves as a coupling, achieving dual purposes. The shaft-avoiding groove design effectively solves the problem that the spiral shaft cannot be increased to improve the conveying effect. 4. The use of a spiral conveying module can achieve a bagless design, thereby realizing the transportation of cement clinker. Its structure is more stable and the noise is lower, avoiding the problems of no load and particle slippage, and further reducing the problem of accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is the overall structural engineering drawing of the present invention; Figure 2 This is a schematic diagram of the coordination between the spiral conveying module and the horizontal pipeline; Figure 3 is a cross-sectional view of an adjustable support member; Figure 4 This is a schematic diagram of the spiral conveying module; Figure 5 This is the exploded view of the spiral conveying module; Figure 6 Schematic diagram of a multi-curved blade Figure 1 ; Figure 7 Schematic diagram of a multi-curved blade Figure 2 .

[0010] In the figure, 1 is the traveling mechanism, 10 is the tower body, 11 is the rotating tower, 12 is the horizontal arm, 13 is the vertical arm, 14 is the reclaiming head, 15 is the driving chute, 2 is a spiral conveying module, 21 is an outer pipe, 22 is an inner pipe, 23 is a multi-curved blade, 24 is a magnetic induction coil, 25 is a permanent magnet, 3 is a horizontal pipe, 41 is a smooth section, 42 is an axis-avoiding groove, 51 is a sealed bearing, 52 is a retaining ring, 6 is an adjustable support, 61 is an adjusting rod, 62 is a positioning bearing, 71 is the first pivot point, 72 is the active hydraulic rod, 81 is the first hydraulic rod, and 82 is the second hydraulic rod. DETAILED DESCRIPTION

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0012] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0013] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0014] like Figures 1 to 7 As shown, a screw conveyor for cement clinker comprises: A traveling mechanism 1, above which a tower body 10 is provided, A rotating tower 11 is provided at the top of the tower body 10; The horizontal arm 12 is swingably mounted on the rotating tower 11. The horizontal arm 12 is provided with a horizontal conveying cavity, and the horizontal conveying cavity is provided with a horizontal spiral shaft. The rotating tower 11 controls the swing of the front end of the horizontal arm 12 through the first hydraulic rod 81. The rotating tower 11 is provided with a rotation drive assembly to drive the horizontal arm 12 to rotate along its axis. The rear end of the horizontal arm 12 is provided with a horizontal driving device for driving the horizontal screw shaft to rotate; A vertical arm 13 is swingably mounted at the end of the horizontal arm 12. The vertical arm 13 is provided with a vertical screw shaft. A vertical drive device for driving the vertical screw shaft to rotate is provided at the rear end of the vertical arm 13. The end section of the vertical arm 13 is also provided with a material taking head 14, and the end section of the vertical arm 13 is provided with a material taking rotating device for driving the material taking head 14 to rotate; The horizontal arm 12 is provided with a horizontal feed port and a horizontal discharge port, and the vertical arm 13 is provided with a vertical feed port and a vertical discharge port; The horizontal discharge port is connected to a driving chute 15; The spiral conveying module 2 (i.e., a shaftless motor structure is used to realize spiral fluid conveying, and there is no shaft in the middle) includes an outer pipe 21, an inner pipe 22, and a multi-curved blade 23 extending from the inner pipe 22. The outer pipe 21 is provided with a magnetic induction coil 24, and the inner pipe 22 is integrally formed with a permanent magnet 25. The outer pipe 21 and the inner pipe 22 are made of non-magnetic materials. The multi-curved blade 23 is provided with multiple blades extending in the axial direction and forming an axis-avoiding groove 42. The spiral conveying module 2 includes a first spiral conveying module 2 and a second spiral conveying module 2; The horizontal arm 12 is composed of multiple sections of horizontal pipes 3. The first spiral conveying module is provided between adjacent horizontal pipes 3. The horizontal pipes 3 are connected to the horizontal pipes 3 by screws or first couplings. The horizontal spiral shaft is provided with a smooth section 41 at the position of the first spiral conveying module. The smooth section 41 is provided at the position of the shaft avoiding groove 42. The driving chute 15 is composed of multiple sections of trough pipes, and adjacent trough pipes are connected by a second spiral conveying module.

[0015] Technical effects of the present invention: 1. The embedded spiral conveying module 2 can effectively increase the fluid pressure and avoid the problem of accumulation caused by single mechanical conveying, which causes the resistance of some sections of the spiral shaft to increase; 2. The design of the multi-curved blades 23 can not only meet the requirements of spiral conveying of cement clinker, but also form a predetermined flow pressure, thereby achieving imitation spiral conveying while increasing the flow rate in the pipeline, and can also spirally convey cement clinker; 3. Although the spiral conveying module 2 has a simple structure, it can transport the horizontal pipeline 3 in sections, thereby reducing the high transportation cost of large machinery during transportation. At the same time, it also serves as a coupling, achieving dual purposes. The design of the shaft avoidance groove 42 effectively solves the problem that the spiral shaft cannot be increased to improve the conveying effect. 4. The use of a spiral conveying module can achieve a bagless design, thereby realizing the transportation of cement clinker. Its structure is more stable and the noise is lower, avoiding the problems of no load and particle slippage, and further reducing the problem of accumulation.

[0016] Specifically, the inner pipe 22 and the outer pipe 21 are formed by casting aluminum alloy, preferably hard aluminum alloy, so as to meet the processing requirements of large-scale machinery.

[0017] Specifically, the outer walls of the inner pipe 22 and the multi-curved blades 23 are provided with a wear-resistant ceramic layer, such as an alloy aluminum alloy lined with corundum ceramic, thereby meeting the service life requirements of large machinery while reducing processing costs.

[0018] Specifically, the wear-resistant ceramic layer is locked by screws. In large machinery, compared with existing coatings, the direct fixation with screws can be easily replaced, and the wear-resistant thickness is greater, thereby reducing the problem of the entire coating needing to be replaced after wear.

[0019] Specifically, a rotation gap is provided between the inner wall of the inner pipe 22 and the outer wall of the outer pipe 21, and a sealing bearing 51 is provided in the rotation gap. A retaining ring 52 is provided at both ends of the sealing bearing 51. The retaining ring 52 is annular, and the outer peripheral wall of the retaining ring 52 is provided with an elastic ring, thereby effectively preventing the entry of foreign matter.

[0020] Specifically, the two ends of the outer pipe 21 are provided with adjustable support members 6 , and the adjustable support members 6 are used to align the smooth section 41 for support.

[0021] Specifically, the adjustable support member 6 includes a hole provided in the outer pipe 21 and an adjusting rod 61 installed in the hole. There are at least three adjusting rods 61. A positioning bearing 62 is provided in the middle of the adjusting rod 61. Both ends of the smooth section 41 are provided on the positioning bearing 62. The outer pipe 21 and the positioning bearing 62 are combined into the same module, thereby ensuring that the axis of rotation of the horizontal spiral shaft is consistent.

[0022] By adjusting the relative position of the positioning bearing 62, the support and coaxiality of the horizontal screw shaft are achieved.

[0023] Specifically, a support rod extends upward from the tower body 10 , a plurality of second hydraulic rods extend from the top end of the support rod toward the horizontal arm 12 , and a weight-bearing balance block is provided at the rear end of the horizontal arm 12 .

[0024] Specifically, a first pivot point 71 is provided between the vertical arm 13 and the horizontal arm 12, and an active hydraulic rod 72 is provided between the front ends of the vertical arm 13 and the horizontal arm 12. One end of the active hydraulic rod 72 is pivotally connected to the vertical arm 13, and the other end is arranged adjacent to the lower end of the second hydraulic rod in the front section. A distance is provided between the upper end of the active hydraulic rod 72 and the first pivot point 71, thereby effectively ensuring the balance of the screw conveyor, simplifying the complexity of the fulcrum calculation, and improving the stability and safety of use.

[0025] Specifically, the upper end of the first hydraulic rod is provided with the lower wall of the horizontal arm 12, and the lower end is provided with the middle part of the tower body 10, thereby forming a fulcrum structure.

[0026] Specifically, when the inner diameter of the inner pipe 22 is 80CM, the pitch ratio = 1.5 (P / D = 1.5) ensures balanced conveying efficiency and flow pressure formation; That is, the multi-curved blades 23 can be spirally formed or set to a curved surface, wherein the angle of the multi-curved blades 23 is 20° at the inlet section (to promote feeding) and 10° at the outlet section (to enhance flow pressure).

[0027] Transport capacity Q = 47⋅D2⋅n⋅ψ⋅ρ⋅C D=0.8m, speed n=200rpm, Filling ratio ψ = 0.3 (cement clinker); Density ρ = 1.5t / m 3 , inclination coefficient C=1; Calculation shows: Q ≈ 90t / h (meets the needs of medium-sized cement plants).

[0028] Flow pressure forming ability, linear velocity at the end of multi-curved blade 23: v=πDn / 60≈8.4m / s; Flow pressure value: ΔP=0.5⋅ζ⋅ρair⋅v2≈0.8kPa (ζ=1.2, ρ a ᵢᵣ=1.2kg / m 3 ).

[0029] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A screw conveyor for cement clinker, characterized in that: include: A walking mechanism, wherein a tower body is provided above the walking mechanism, A rotating tower, which is arranged at the top of the tower body; The horizontal arm is swingably mounted on the rotating tower, and the horizontal arm is provided with a horizontal conveying cavity, and the horizontal conveying cavity is provided with a horizontal spiral shaft. The rotating tower controls the swing of the front end of the horizontal arm through a first hydraulic rod, and the rotating tower is provided with a rotating drive assembly to drive the horizontal arm to rotate along its axis; The rear end of the horizontal arm is provided with a horizontal driving device for driving the horizontal screw shaft to rotate; A vertical arm, the vertical arm being swingably mounted at the end of the horizontal arm, the vertical arm being provided with a vertical screw shaft, and a vertical driving device for driving the vertical screw shaft to rotate being provided at the rear end of the vertical arm; The end section of the vertical arm is also provided with a material taking head, and the end section of the vertical arm is provided with a material taking rotating device for driving the material taking head to rotate; The horizontal arm is provided with a horizontal feed inlet and a horizontal discharge port, and the vertical arm is provided with a vertical feed inlet and a vertical discharge port; The horizontal discharge port is connected to a driving chute; The spiral conveying module includes an outer pipe, an inner pipe, and multi-curved blades extending from the inner pipe. The outer pipe is provided with a magnetic induction coil, and the inner pipe is integrally formed with a permanent magnet. The outer pipe and the inner pipe are made of non-magnetic materials. The multi-curved blades are provided in plurality and extend in the axial direction to form an axis-avoiding groove. The spiral conveying module includes a first spiral conveying module and a second spiral conveying module; The horizontal arm is composed of multiple sections of horizontal pipes, and the first spiral conveying modules are arranged between adjacent horizontal pipes. The horizontal pipes are connected to the horizontal pipes through screws or first couplings. The horizontal spiral shaft is provided with a smooth section at the position of the first spiral conveying module, and the smooth section is arranged at the position of the shaft avoidance groove; The driving chute is composed of multiple sections of trough pipes, and adjacent trough pipes are connected by a second spiral conveying module.

2. The screw conveyor for cement clinker according to claim 1, characterized in that: The inner pipe and the outer pipe are formed by casting of aluminum alloy.

3. The screw conveyor for cement clinker according to claim 1, characterized in that: The outer walls of the inner pipe and the multi-curved blades are provided with a wear-resistant ceramic layer, and the multi-curved blades include a plurality of curved blades arranged at intervals.

4. The screw conveyor for cement clinker according to claim 3, characterized in that: The wear-resistant ceramic layer is penetrated and locked by a screw.

5. The screw conveyor for cement clinker according to claim 4, characterized in that: A rotation gap is provided between the inner wall of the inner pipe and the outer wall of the outer pipe. A sealing bearing is provided in the rotation gap. Both ends of the sealing bearing are provided with retaining rings. The retaining rings are annular and the outer peripheral wall of the retaining rings is provided with an elastic ring.

6. The screw conveyor for cement clinker according to claim 1, characterized in that: The outer pipe has adjustable support members at both ends, and the adjustable support members are used to align the smooth section for support.

7. The screw conveyor for cement clinker according to claim 6, characterized in that: The adjustable support member includes a hole provided in the outer pipe and an adjusting rod installed in the hole. There are at least three adjusting rods. A positioning bearing is provided in the middle of the adjusting rod, and both ends of the smooth section are provided on the positioning bearings.

8. The screw conveyor for cement clinker according to claim 1, characterized in that: The tower body is provided with a support rod extending upward, and a plurality of second hydraulic rods are extended from the top of the support rod toward the horizontal arm. A weight-bearing balance block is provided at the rear end of the horizontal arm.

9. The screw conveyor for cement clinker according to claim 8, characterized in that: A first pivot point is provided between the vertical arm and the horizontal arm, and an active hydraulic rod is provided between the front ends of the vertical arm and the horizontal arm. One end of the active hydraulic rod is pivotally connected to the vertical arm, and the other end is arranged adjacent to the lower end of the second hydraulic rod in the front section. A distance is provided between the upper end of the active hydraulic rod and the first pivot point.

10. The screw conveyor for cement clinker according to claim 9, characterized in that: The upper end of the first hydraulic rod is provided with the lower wall of the horizontal arm, and the lower end is provided with the middle part of the tower body.

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