Coal slime drying system

Abstract

The invention relates to a coal slime drying system. The coal slime drying system comprises a spiral conveyor, a roller dryer and a pushing device. Wherein the spiral conveyor comprises a feeding spiral cylinder and a first sealing cylinder; the discharging end of the feeding spiral cylinder extends into the inner cavity of the drying machine through a feeding hole of the roller drying machine; the first sealing cylinder is connected to the discharging end of the feeding spiral cylinder in a sleeving mode, and an exhaust channel is formed between the first sealing cylinder and the feeding spiral cylinder. The pushing device comprises a first driving mechanism and a pushing mechanism; the first driving mechanism is installed on the feeding spiral barrel, the pushing mechanism is connected with the driving mechanism in a matched mode, and the pushing end of the pushing mechanism is arranged in the exhaust channel and is driven by the driving mechanism to move back and forth along the exhaust channel. Stacked materials in the exhaust channel are automatically cleaned through the pushing device, and meanwhile, the angle-adjustable supporting device is installed at the bottom of the rack, so that the concentricity adjustment flexibility of the first sealing cylinder and the inner cavity of the dryer is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal slime drying, and in particular relates to a coal slime drying system. Background Art

[0002] In the coal processing industry, the drum drying of coal slime is a key link. In the prior art, the coal slime drum drying system at least includes a feed screw conveyor and a drum dryer. Among them, the feed screw conveyor is used to transport the coal slime material to the dryer for drying, and at least includes a feed screw barrel and a sealing barrel. A feed screw is provided in the feed screw barrel to transport the coal slime material, and the outlet end of the feed screw barrel is connected to the feed port of the dryer. The diameter of the sealing barrel is larger than the diameter of the feed screw barrel, and it is sleeved on the outlet end of the feed screw barrel, one end of which is connected to the barrel wall of the feed screw barrel, and the other end is connected to the dryer. A tubular gap is formed between the sealing barrel and the feed screw barrel, which serves as an exhaust channel for the water vapor evaporated in the dryer.

[0003] During the drum drying process, the water evaporated from the dryer needs to be extracted by a fan and discharged through the exhaust channel between the sealing cylinder and the feeding spiral cylinder. However, in actual use, the fan will extract some dust in the dryer while extracting water vapor. If the dust accumulates in the exhaust channel and is not cleaned in time, it may cause the air outlet to be blocked, thereby affecting the drying efficiency and the normal operation of the equipment.

[0004] In addition, in order to facilitate the transportation of raw materials, the axis of the feed cylinder of the steam drum dryer usually has an inclined angle of 1-5° relative to the ground, and the sealing cylinder of the screw conveyor needs to be coaxially arranged with the dryer cylinder during installation. Therefore, in the actual use environment, it is necessary to raise the support frame on one side of the screw conveyor, and adjust the relative height of the two ends of the frame based on the actual inclined angle of the feed cylinder of the drum dryer, change the inclination angle of the frame, and then adjust the concentricity of the feed cylinder of the steam drum dryer and the sealing cylinder of the feed screw conveyor. In the prior art, the adjustment of the inclination angle of the frame is mostly done by inserting a pad and welding it. This method is primitive and time-consuming and labor-intensive, making installation and maintenance work very inconvenient. Summary of the invention

[0005] The object of the present invention is to solve one of the above-mentioned technical problems and to provide a coal slime drying system. By installing a pushing device on a screw conveyor, the dust accumulated in the exhaust duct can be automatically cleaned. Furthermore, by installing an angle-adjustable frame fixing support device under the frame, the flexibility of adjusting the concentricity of the feed cylinder of the steam drum dryer and the sealing cylinder of the feed screw conveyor is improved.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A coal slime drying system, comprising: a screw conveyor, a drum dryer and a material pushing device;

[0008] The drum dryer is provided with a feed inlet;

[0009] The screw conveyor comprises a feeding screw cylinder and a first sealing cylinder;

[0010] The feed spiral drum is provided with a discharge end, and the discharge end of the feed spiral drum extends into the inner cavity of the drum dryer through the feed inlet of the drum dryer;

[0011] The first sealing cylinder is sleeved on the discharge end of the feeding spiral cylinder, one end of the first sealing cylinder is connected to the feeding port of the drum dryer, and the other end is connected to the feeding spiral cylinder;

[0012] An exhaust passage communicating with the inner cavity of the drum dryer is formed between the cylinder wall of the first sealing cylinder and the cylinder wall of the feeding spiral cylinder;

[0013] The material pushing device comprises a first driving mechanism and a material pushing mechanism;

[0014] The first driving mechanism is installed on the feeding spiral barrel, the pushing mechanism is connected with the driving mechanism, the pushing end of the pushing mechanism is arranged in the exhaust channel, and moves back and forth along the exhaust channel under the driving of the driving mechanism.

[0015] In some embodiments of the present invention, the first driving mechanism includes a driving member and a transmission member;

[0016] The transmission member is connected to the power output end of the driving member, and a thread is provided on the transmission member;

[0017] The pushing mechanism includes a pushing rod and a pushing plate;

[0018] One end of the push rod is arranged in the exhaust passage; the outer wall of the push rod is provided with a thread, and the thread of the outer wall of the push rod is meshed with the thread of the transmission member to convert the radial rotation of the transmission member driven by the driving member into the axial movement of the push rod;

[0019] The push plate is arranged in the exhaust passage and connected with the push rod.

[0020] In some embodiments of the present invention, the screw conveyor further includes a second driving mechanism and a screw conveying assembly; the screw conveying assembly is arranged in the feed screw barrel, the second driving mechanism is arranged at one end of the feed screw barrel, and the power output end of the second driving mechanism is connected to the screw conveying assembly for driving the screw conveying assembly to rotate radially in the feed screw barrel.

[0021] In some embodiments of the present invention, the second driving mechanism includes a driving motor, a reducer, a coupling and a bearing assembly;

[0022] The reducer is installed on the power output shaft of the driving motor; one end of the coupling is transmission-connected to the reducer; the bearing assembly is arranged between the feed screw barrel and the coupling; one end of the end of the screw conveying assembly passes through the bearing assembly and is transmission-connected to the coupling.

[0023] In some embodiments of the present invention, the central axis of the drum body of the drum dryer is arranged at a predetermined angle with the horizontal plane, and the first sealing cylinder is arranged coaxially with the drum body of the drum dryer.

[0024] In some embodiments of the present invention, it further includes a rack and a rack fixing support device;

[0025] The screw conveyor is fixed on the top of the frame, and the frame fixing support device is fixed on the bottom of the frame;

[0026] The frame includes at least one group of relatively arranged bottom beams; the frame fixing support device includes a pressure plate mechanism and a rotating shaft support assembly; the pressure plate mechanism and the rotating shaft support assembly are respectively arranged at both ends of the bottom beam, and form a predetermined height difference at both ends of the frame in the length direction.

[0027] In some embodiments of the present invention, the pressure plate mechanism is slidably connected to the bottom cross beam, and the shaft support assembly is rotatably connected to the bottom cross beam.

[0028] In some embodiments of the present invention, a drying machine feed inlet sealing device is further included;

[0029] The sealing device includes a second sealing cylinder, which is sleeved on the first sealing cylinder and connected to the drum dryer at one end close to the feed port of the drum dryer; an annular gap is formed between the inner wall of the second sealing cylinder and the outer wall of the first sealing cylinder; an elastic sealing ring is arranged in the annular gap to form a seal between the second sealing cylinder and the first sealing cylinder.

[0030] In some embodiments of the present invention, one end of the first sealing cylinder extends into the inner cavity of the drum dryer through the feed port of the drum dryer, and the length of the first sealing cylinder extending into the inner cavity of the drum dryer is greater than the length of the feed spiral cylinder extending into the inner cavity of the drum dryer.

[0031] In some embodiments of the present invention, a fan is further included, and an air suction port of the fan is connected to the exhaust channel through a pipeline.

[0032] The beneficial effects of the present invention are:

[0033] 1. The present invention solves the technical problem that dust is easily accumulated in the exhaust channel of the coal slime drying system. A pushing device is installed above the feeding spiral drum. The pushing end of the pushing mechanism is arranged in the exhaust channel and moves back and forth along the exhaust channel under the drive of the driving mechanism. The accumulated dust in the exhaust channel can be automatically cleaned at regular intervals, which greatly improves the cleaning efficiency of the dust in the exhaust channel and effectively reduces the labor cost of dust cleaning.

[0034] 2. The transmission part of the screw conveying assembly of the present invention is connected to the coupling through the spherical roller bearing. With the help of the automatic self-aligning function of the spherical roller bearing, the transmission shaft can be self-centered within a certain range to buffer the vibration load generated during the material conveying process of the shaftless spiral blade, and adjust the axial deviation and inclination of the shaftless spiral blade to ensure the efficiency and continuity of conveying sticky materials such as wet coal slime.

[0035] 3. The present invention realizes stable support for the frame through the design of the pressure plate mechanism and the rotating shaft support assembly. At the same time, the adjustment method for the tilt angle of the frame is simple and flexible, thereby improving the adaptability of the frame.

[0036] 4. The present invention solves the technical problem that wet coal slime is squeezed out from the connection between the drum dryer and the first sealing cylinder due to thermal expansion and contraction and relative vibration of the first sealing cylinder in the drum dryer and the screw conveyor during the coal slime drying process. By winding multiple circles of elastic sealing rings in the gap between the second sealing cylinder and the first sealing cylinder, a seal is effectively formed between the first sealing cylinder of the screw conveyor and the feed port of the drum dryer, preventing wet coal slime from being squeezed out from the connection and reducing environmental pollution during the coal slime drying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 It is a structural schematic diagram of a coal slime drying system;

[0039] Figure 2 for Figure 1 A-direction structural schematic diagram;

[0040] Figure 3 It is the structural schematic diagram of the screw feeder;

[0041] Figure 4 It is a structural schematic diagram of the spiral conveying component;

[0042] Figure 5 is a structural schematic diagram of a bearing assembly;

[0043] Figure 6 for Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0044] Figure 7 It is a structural schematic diagram of the pushing device;

[0045] Figure 8 for Figure 7 Cross-section of BB

[0046] Fig. 9 It is a structural schematic diagram of the pusher device in the extended state;

[0047] Fig.10 It is a top view of the pushing device;

[0048] Fig.11 for Fig.10 Cross-sectional view of CC;

[0049] Fig.12 It is a structural schematic diagram of the material pushing mechanism;

[0050] Fig.13 It is a side view of the push plate;

[0051] Fig.14 It is a structural schematic diagram of the pressing plate mechanism;

[0052] Fig.15 It is a front view of the pressing plate mechanism;

[0053] Fig.16 for Fig.15 AA cross-sectional view;

[0054] Fig.17 It is a side view of the pressing plate mechanism;

[0055] Fig.18 It is a front view of the rotating shaft support assembly;

[0056] Fig.19 is a side view of the shaft support assembly;

[0057] Fig. 20 It is a schematic diagram of the coordination relationship between the rack fixing support device and the rack;

[0058] Fig.21 It is a structural schematic diagram of the feed inlet sealing device;

[0059] Fig. 22 for Fig.21 A schematic diagram of the enlarged structure of the middle part A;

[0060] Fig.23 is a schematic structural diagram of the second end cover;

[0061] Wherein, the accompanying drawings are marked as follows:

[0062] 1. Screw conveyor; 11. Feed screw barrel; 111. Guide part; 12. Screw conveying assembly; 121. Screw part; 122. Conveying part; 13. Driving motor; 14. Reducer; 15. Coupling; 16. Bearing assembly; 161. Bearing seat; 162. Spherical roller bearing; 163. Adapter sleeve; 17. Drive end seal assembly; 171. Second end cover; 172. Packing box; 173. Packing; 18. First sealing barrel; 181. First end cover; 19. Feed port of screw barrel;

[0063] 2. Drum dryer;

[0064] 3. Pushing device; 31. First driving mechanism; 311. Motor housing; 312. Mandrel; 313. Transmission member; 32. Pushing rod; 33. Pushing plate; 331. Rigid pushing part; 332. Elastic pushing part; 333. Connecting part; 3321. Matching part; 334. First pin shaft; 34. Rod sleeve; 341. Triangular raised part; 35. Dust cover;

[0065] 4. Frame; 41. Bottom beam;

[0066] 5. Rack fixing support device; 51. Pressing plate mechanism; 511. Slide rail seat; 5111. Guide rail; 512. Wedge block; 5121. Groove; 513. Pressing plate; 514. First adjusting bolt; 515. Second adjusting bolt; 516. Baffle; 517. Threaded base; 52. Rotating shaft support assembly; 521. Support; 522. Second pin shaft; 523. Latch; 524. Bottom plate;

[0067] 6. Feed inlet sealing device; 61. Second sealing cylinder; 611. Annular limiting portion; 612. Fixing portion; 62. Third end cover; 621. Arc portion; 63. Elastic sealing ring;

[0068] 7. Cyclone dust collector;

[0069] 8. Exhaust duct. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0071] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0072] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0073] The technical solution of the present invention is described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0074] As attached Figure 1 -Attached Fig.23 As shown, in an illustrative embodiment of a coal slime drying system of the present invention, the coal slime drying system includes a screw conveyor 1, a drum dryer 2 and a pushing device 3.

[0075] The drum dryer 2 is provided with a feed port, and its working principle is to feed the wet material into the drum cavity through the feed port, and continuously roll in the drum cavity to be dried by the high-temperature hot air flow. A dispersing mechanism is provided at the center of the drum dryer 2, and the wet material entering the drum body is repeatedly picked up and thrown down by the shovel on the drum wall, and is broken into fine particles by the dispersing device during the falling process, so as to increase the contact area between the wet coal slime material and the hot air and improve the efficiency.

[0076] The screw conveyor 1 includes a feed screw cylinder 11 and a first sealing cylinder 18 .

[0077] A feeding screw is arranged inside the feeding screw barrel 11, which is used to transport the wet coal slime into the drum dryer 2. The feeding screw barrel 11 is provided with a feeding end and a discharging end. Among them, a driving mechanism is arranged at the feeding end of the feeding screw barrel 11 to drive the feeding screw to rotate and transport the wet coal slime material. A spiral barrel feeding port 19 with an opening facing upward is opened on the barrel wall of the feeding end, and the edge of the spiral barrel feeding port 19 is arranged to protrude from the shell in the barrel wall to guide and limit the material entering the barrel wall from the spiral barrel feeding port 19. The discharging end extends into the inner cavity of the drum dryer 2 through the feeding port of the drum dryer 2.

[0078] The diameter of the first sealing cylinder 18 is larger than the diameter of the feed spiral cylinder 11, and it is sleeved on the outside of the discharge end of the feed spiral cylinder 11, with one end connected to the feed port of the drum dryer 2, and the other end connected to the feed spiral cylinder 11. An exhaust passage connected to the inner cavity of the drum dryer 2 is formed between the cylinder wall of the first sealing cylinder 18 and the cylinder wall of the feed spiral cylinder 11. In this embodiment, an annular gap is formed between the cylinder wall of the first sealing cylinder 18 and the cylinder wall of the feed spiral cylinder 11, and two partition plates are arranged in the annular gap, which has divided the annular gap into two independent semicircular tubular passages, one above and the other, wherein the tubular passage located at the top is connected to the inner cavity of the drum dryer 2 as an exhaust passage.

[0079] The pushing device 3 is installed above the feeding spiral drum 11 of the screw conveyor 1, and is used to push the dust accumulated in the exhaust passage formed between the first sealing drum 18 and the feeding spiral drum 11 back into the dryer.

[0080] The pushing device 3 comprises a first driving mechanism 31 and a pushing mechanism.

[0081] The first driving mechanism 31 is fixedly mounted on the feeding spiral barrel 11, and the pushing mechanism is connected with the first driving mechanism 31. The pushing end of the pushing mechanism is arranged in the exhaust channel, and moves back and forth along the exhaust channel under the drive of the first driving mechanism 31 to push the dust accumulated in the exhaust channel back into the dryer.

[0082] The above-mentioned schematic embodiment solves the technical problem that dust is easily accumulated in the exhaust channel of the coal slime drying system. A pushing device 3 is installed above the feeding spiral barrel 11, and the pushing end of the pushing mechanism is arranged in the exhaust channel. Driven by the first driving mechanism 31, it makes reciprocating motion along the exhaust channel, which can achieve the effect of automatic and regular cleaning of dust accumulated in the exhaust channel, greatly improves the cleaning efficiency of the dust in the exhaust channel, and effectively reduces the labor cost of dust cleaning.

[0083] In some embodiments of the present invention, as shown in the attached Figure 7 -Attached Fig.13 As shown, the first driving mechanism 31 is specifically an electric worm gear transmission mechanism, which is installed above the feeding spiral cylinder 11 and arranged in alignment with the first sealing cylinder 18. The first driving mechanism 31 includes a motor housing 311, a driving member and a transmission member 313.

[0084] The housing is fixedly connected to the wall of the feed screw 11, and the driving member and the transmission member 313 are arranged in the motor housing 311. The driving member is specifically an electric motor, which is located inside the motor housing 311, so it is not shown in the figure; the transmission member 313 is specifically a turbine, which is connected to the output shaft of the motor through the mandrel 312 to rotate radially under the drive of the motor, and a trapezoidal thread is arranged on the outer wall of the turbine. In this embodiment, the motor in the electric worm gear transmission mechanism is configured to run at intervals, and automatically runs to drive the push rod 32 and the push plate to complete a push-pull action at every predetermined interval.

[0085] The pushing mechanism includes a pushing rod 32 and a pushing plate 33 .

[0086] The push rod 32 is arranged above the feed screw 11 and extends along the axial direction of the feed screw 11. Its rod body passes through the motor housing 311 of the first drive mechanism 31, and one end is arranged in the exhaust channel between the first sealing cylinder 18 and the feed screw 11. Figure 7 -Attached Fig.13 As shown, the push rod 32 is specifically a trapezoidal screw, and a trapezoidal thread is provided on its outer wall. The trapezoidal thread on the outer wall of the push rod 32 meshes with the trapezoidal thread of the transmission member 313, so as to convert the radial rotation of the transmission member 313 driven by the driving member into the axial telescopic movement of the push rod 32. In this embodiment, the length of the push rod 32 is greater than the length of the exhaust passage. Specifically, the length of the push rod 32 is greater than the horizontal distance between the end of the feed spiral drum 11 close to the dryer and the first driving mechanism 31, so as to ensure that the first driving mechanism 31 can drive the push rod 32 to move back and forth in the entire exhaust passage, and push the dust in the exhaust passage back into the dryer.

[0087] The push plate 33 is arranged in the exhaust passage between the first sealing cylinder 18 and the feeding spiral cylinder 11, and is fixedly connected to the push rod 32 to push the dust accumulated in the exhaust passage back into the dryer during the axial movement of the push rod 32.

[0088] In some embodiments of the present invention, in order to ensure the pushing effect of the push plate 33, as shown in the attached Figure 7 -Attached Fig.13 As shown, the shape of the push plate 33 matches the shape of the exhaust passage. Specifically, the end surface of the push plate 33 close to the sealing cylinder and the end surface close to the feed spiral cylinder 11 are both arc-shaped surfaces, and their curvatures match the curvatures of the cylinder walls of the sealing cylinder and the feed spiral cylinder 11, respectively.

[0089] In some embodiments of the present invention, in order to further ensure the pushing effect of the push plate 33, as shown in the attached Figure 7 -Attached Fig.13As shown, the push plate 33 includes a rigid push portion 331 and an elastic push portion 332. The rigid push portion 331 is connected to the push rod 32, and the elastic push portion 332 is connected to the elastic push portion 332 by screws. Specifically, the rigid push portion 331 is made of metal material, for example, steel metal material; the elastic push portion 332 is made of rubber material, for example, fluororubber material. The elastic pushing portion 332 is fixed to the periphery of the rigid pushing portion 331, or the elastic pushing portion 332 is fixed to the side of the rigid pushing portion 331 away from the pushing rod 32. The end face of the elastic pushing portion 332 close to the sealing cylinder and the end face close to the feeding spiral cylinder 11 are respectively in contact and connected with the cylinder wall of the first sealing cylinder 18 and the cylinder wall of the feeding spiral cylinder 11, wherein the rigid pushing portion 331 is used to ensure the overall structural strength of the pushing plate 33, so as to improve the cleaning effect of the pushing device 3 under the working condition of more dust accumulation. The elastic pushing portion 332 is respectively in contact and connected with the cylinder wall of the sealing cylinder and the cylinder wall of the feeding spiral cylinder 11. On the one hand, based on its elastic characteristics, it can ensure close contact between the pushing plate 33 and the cylinder wall, further ensuring the cleaning effect. On the other hand, it can reduce damage to the cylinder wall and enhance the durability of the screw conveyor 1.

[0090] In some embodiments of the present invention, in order to guide the reciprocating sliding cleaning trajectory of the push plate 33 in the exhaust channel, a guide portion 111 protruding from the wall of the feed spiral barrel 11 inside the exhaust channel is provided above the wall of the feed spiral barrel 11 along the extension direction of the exhaust channel. The push plate 33 is close to the end face of the feed spiral barrel 11, and a matching portion 3321 matching the shape of the guide portion 111 is provided at a position corresponding to the guide portion 111. The push plate 33 is connected to the guide portion 111 through the matching portion 3321, so that the push plate 33 can slide along the extension direction of the guide portion 111. Specifically, in this embodiment, as shown in the attached Figure 7 -Attached Fig.13 As shown, the guide portion 111 is a rectangular guide rail 5111 protruding from the wall of the feed spiral cylinder 11 , and the matching portion 3321 is a rectangular groove matching the size of the rectangular guide rail 5111 .

[0091] In some embodiments of the present invention, in order to achieve the connection between the push plate 33 and the push rod 32, a first pin shaft 334 is further included. A connecting portion 333 protruding from the plate surface is formed on one side of the push plate 33 close to the push rod 32, and the connecting portion 333 includes two triangular plate-like structures arranged opposite to each other, and a gap is formed between the two triangular plate-like structures, and the width of the gap is the same as the diameter of the push rod 32. Opposite first pin shaft holes are formed on the two triangular plate-like structures. A second pin shaft hole is formed at the end of the push rod 32, which is inserted into the gap between the two triangular plate-like structures, and the second pin shaft hole corresponds to the position of the two first shaft pin holes. The first pin shaft 334 passes through the first pin shaft hole and the second pin shaft hole to connect the push rod 32 and the push plate 33.

[0092] In some embodiments of the present invention, the first driving mechanism 31 is installed between the spiral drum feed port 19 and the first sealing drum 18, and a rod sleeve 34 is sleeved on one end of the push rod 32 away from the push plate 33, and the rod sleeve 34 crosses the shell of the spiral drum feed port 19 protruding from the drum wall, and is fixedly connected to the shell of the spiral drum feed port 19. The push rod 32 can slide axially in the rod sleeve 34, and the rod sleeve 34 can prevent the protruding shell of the spiral drum feed port 19 from interfering with the axial movement of the push rod, and can also be used to protect the push rod 32 from coal slime contamination when the screw conveyor 1 is fed from the spiral drum feed port 19.

[0093] In some embodiments of the present invention, in order to reduce the impact of coal sludge on the rod sleeve 34 when it enters the feeding spiral cylinder 11 from the spiral cylinder feeding port 19, as shown in the attached Figure 7 -Attached Figure 8 As shown, the portion of the rod sleeve 34 located above the feed port is provided with a triangular protrusion 341 facing upwards, which can protect the rod sleeve 34 and reduce impact while also breaking the coal slime.

[0094] In some embodiments of the present invention, a first end cap 181 is fixed to one end of the sealing cylinder close to the first driving mechanism 31, and the sealing cylinder is connected to the spiral feed cylinder through the first end cap 181. A retractable dust cover 35 is sleeved on one end of the push rod 32 close to the push plate 33. The dust cover 35 is made of rubber material to ensure its retractability. Its two ends are respectively connected to the first end cap 181 and the push plate 33, and are stretched and compressed with the axial movement of the push plate in the exhaust channel to protect the part of the push rod 32 located in the exhaust channel from dust pollution.

[0095] In some embodiments of the present invention, as shown in the attached Figure 3 -Attached Figure 6 As shown, the screw conveyor 1 further includes a second driving mechanism and a screw conveying assembly 12; the screw conveying assembly 12 is arranged in the feed screw barrel 11, the second driving mechanism is arranged at one end of the feed screw barrel 11, and the power output end of the second driving mechanism is connected to the screw conveying assembly 12, which is used to drive the screw conveying assembly 12 to rotate radially in the feed screw barrel 11 to transport the wet coal slime material.

[0096] In some embodiments of the present invention, as shown in the attached Figure 3 -Attached Figure 6 As shown, the second driving mechanism includes a driving motor 13 , a reducer 14 , a coupling 15 and a bearing assembly 16 .

[0097] The reducer 14 is installed on the power output shaft of the driving motor 13, and is used to reduce the output of the high-speed motor to a required low speed to meet the rotation speed requirement of the shaftless spiral blade.

[0098] One end of the coupling 15 is drivingly connected to the reducer 14 .

[0099] The bearing assembly 16 includes a bearing seat 161 and a spherical roller bearing 162. The bearing seat 161 is arranged between the feed screw 11 and the coupling 15, the spherical roller bearing 162 is fixed on the bearing seat 161, and the transmission part of the screw conveying assembly 12 is connected to the coupling 15 through the spherical roller bearing 162.

[0100] In some embodiments of the present invention, in order to prevent the shaftless spiral blades of the spiral portion 121 from being deformed due to excessive conveying resistance, wear-resistant steel blades with large thickness are used.

[0101] In some embodiments of the present invention, in order to prevent materials from accumulating at the outlet end of the feed screw barrel 11 , the end of the spiral portion 121 away from the drive motor 13 extends to the outside of the feed screw barrel 11 .

[0102] In some embodiments of the present invention, in order to withstand the vibration load generated by the shaftless spiral blades conveying materials, the spherical roller bearing 162 includes an outer ring, an inner ring, a cage and two rows of rollers. The inner ring and the outer ring are symmetrically arranged, and the two rows of rollers are respectively installed in the roller track formed between the inner ring and the outer ring, and are indented and limited by the cage. The two rows of rollers are used to withstand radial loads, and can also withstand appropriate axial loads in any direction.

[0103] In some embodiments of the present invention, in order to install the spherical roller bearing 162 more firmly, the spherical roller bearing 162 further includes a tightening sleeve 163 , the outer diameter of the tightening sleeve 163 is tapered, and the inner ring is tightly sleeved on the tapered tightening sleeve 163 .

[0104] In some embodiments of the present invention, in order to avoid leakage of materials at the driving end, the screw conveyor 1 further includes a driving end sealing assembly 17, and the transmission part of the screw conveying assembly 12 passes through the driving end sealing assembly 17, the spherical roller bearing 162 and the coupling 15 in sequence.

[0105] The driving end seal assembly 17 includes a second end cover 171 and a packing 173 box 172. The second end cover 171 is fixed to the end of the feed spiral barrel 11 close to the drive motor 13. The packing 173 box 172 is fixedly connected to the second end cover 171, and the transmission member 313 passes through the second end cover 171 and the packing 173 box 172 in sequence and extends to the outside of the feed spiral barrel 11, and is slidably matched with the second end cover 171 and the packing 173 box 172. The packing 173 box 172 is provided with packing 173, and the packing 173 is wound on the transmission member 313.

[0106] In some embodiments of the present invention, in order to prevent the shaftless spiral blades from jumping back and forth in the feed spiral barrel 11 and rubbing against the barrel wall to cause wear of the barrel wall, thereby affecting the service life of the feed spiral barrel 11, the inner wall of the feed spiral barrel 11 is provided with an anti-wear pad layer made of wear-resistant materials such as ductile cast iron and ultra-high molecular polyethylene plate.

[0107] In the above-mentioned exemplary embodiment, the transmission part of the screw conveying assembly 12 is connected to the coupling 15 through the spherical roller bearing 162. With the help of the automatic self-aligning function of the spherical roller bearing 162, the transmission part can be self-centered within a certain range to buffer the vibration load generated during the material conveying process of the shaftless spiral blade, and adjust the axial deviation and inclination of the shaftless spiral blade to ensure the efficiency and continuity of the conveying of viscous materials such as wet coal slime.

[0108] In some embodiments of the present invention, as shown in the attached Figure 1 As shown, the central axis of the drum body of the drum dryer 2 is arranged at a predetermined angle with the horizontal plane, and the first sealing cylinder 18 is coaxially arranged with the drum body of the drum dryer 2 .

[0109] In some embodiments of the present invention, as shown in the attached Fig.14 -Attached Fig. 20 As shown, in order to facilitate the adjustment of the concentricity between the drum body of the drum dryer 2 and the first sealing cylinder 18, a frame 4 and a frame fixing support device 5 are further included.

[0110] The screw conveyor 1 is fixed above the frame 4 , and the frame fixing support device 5 is fixed below the frame 4 .

[0111] The frame 4 is a rectangular frame structure composed of two groups of bottom cross beams 41 arranged oppositely, two groups of top cross beams arranged oppositely and four vertical beams. The frame fixing support device 5 includes a pressing plate mechanism 51 and a rotating shaft support assembly 52; the pressing plate mechanism 51 and the rotating shaft support assembly 52 are respectively arranged at both ends of the bottom cross beam 41, and form a predetermined height difference at both ends of the frame 4 in the length direction.

[0112] In some embodiments of the present invention, in order to adjust the height difference between the two ends of the frame 4, the pressure plate mechanism 51 is slidably connected to the bottom beam 41, and the shaft support assembly 52 is rotatably connected to the bottom beam 41.

[0113] In some embodiments of the present invention, the pressing plate mechanism 51 is parallel to the length direction of the bottom cross beam 41, as shown in the attached Fig.14 -Attached Fig.17 As shown, it includes a slide rail seat 511, a wedge block 512, a pressure plate 513, a first adjusting bolt 514 and a second adjusting bolt 515.

[0114] The slide rail seat 511 is installed on a horizontal plane, and its top end surface is a horizontal plane. A baffle 516 is vertically arranged at one end of the slide rail seat 511 away from the rotating shaft support assembly 52 in the length direction, for fixing the first adjustment bolt 514 and for limiting the horizontal sliding range of the wedge block 512 on the slide rail seat 511.

[0115] The wedge block 512 is slidably mounted on the top end surface of the slide rail seat 511 . The top end surface of the wedge block 512 is an inclined surface, and the inclination direction of the top inclined surface of the wedge block 512 is gradually decreasing from the direction close to the baffle 516 to the direction away from the baffle 516 .

[0116] The baffle plate 516 is provided with a threaded hole that passes through the baffle plate 516 horizontally. The first adjusting bolt 514 passes through the threaded hole in the horizontal direction and is in contact with the side wall of the wedge block 512, so that the wedge block 512 is driven to move horizontally along the projection of the bottom cross beam 41 in the vertical direction by rotating the first adjusting bolt 514, and then the height of the installation end of the bottom cross beam 41 pressing plate mechanism 51 is adjusted by changing the relative position of the wedge block 512 and the bottom cross beam 41. When the wedge block 512 moves away from the baffle plate 516, the height of the installation end of the bottom cross beam 41 pressing plate mechanism 51 gradually increases, and when the wedge block 512 moves closer to the baffle plate 516, the height of the installation end of the bottom cross beam 41 pressing plate mechanism 51 gradually decreases.

[0117] The pressure plate 513 is fixed on the slide rail seat 511, and the clamping working surface of the pressure plate 513 is arranged opposite to the inclined surface of the wedge block 512. A gap for accommodating the bottom beam 41 is formed between the clamping working surface of the pressure plate 513 and the inclined surface of the wedge block 512, and the bottom beam 41 is arranged between the clamping working surface and the inclined surface.

[0118] The second adjusting bolt 515 penetrates the pressing plate 513 from top to bottom and is in contact with and connected to the bottom cross beam 41 , so that the bottom cross beam 41 is pressed by rotating the second adjusting bolt 515 .

[0119] In some embodiments of the present invention, in order to cooperate with the pressing plate mechanism 51 to achieve height adjustment, as shown in the attached Fig.18 -Attached Fig.19 As shown, the shaft support assembly 52 includes a support 521 , a second pin 522 and a latch 53 .

[0120] The support 521 and the slide rail seat 511 are installed on the same horizontal plane. The vertical cross section of the support 521 is in the shape of a rounded triangle. A third pin shaft hole is opened on the support 521 .

[0121] A radial through hole is opened at the mounting end of the support 521 of the bottom beam 41, and the second pin shaft 522 passes through the radial through hole and the third pin shaft hole of the bottom beam 41 in sequence to connect the bottom beam 41 and the support 521. After installation, the bottom beam 41 can rotate around the second pin shaft 522 as the center to cooperate with the height adjustment of the mounting end of the pressure plate mechanism 51.

[0122] In order to prevent the second pin shaft 522 from falling out during the rotation of the bottom cross beam 41, a stop portion is provided at the end of the second pin shaft 522 passing through the radial through hole of the bottom cross beam 41, and the diameter of the stop portion is larger than the diameter of the radial through hole; the end of the second pin shaft 522 passing through the third pin shaft hole is provided with a pin hole 53 radially passing through the body of the second pin shaft 522, the pin 53 is inserted in the pin hole 53, and the length of the pin 53 is larger than the diameter of the third pin shaft hole.

[0123] In some embodiments of the present invention, in order to fix the rotating shaft support assembly 52, a bottom plate 524 is provided at the bottom of the support 521, the bottom plate 524 is welded on a horizontal plane, the top end surface of the bottom plate 5242 is a horizontal plane, and the support 521 is fixed to the top end surface of the bottom plate 524 by screws.

[0124] In some embodiments of the present invention, in order to enable the wedge block 512 to slide in the horizontal direction, a guide rail 5111 is provided on the top end surface of the slide rail seat 511 , protruding from the top end surface thereof and extending horizontally along the length direction of the bottom cross beam 41 .

[0125] A groove 5121 is provided on the bottom end face of the wedge block 512, the width of the groove 5121 matches the width of the guide rail 5111, and the depth of the groove 5121 matches the height of the guide rail 5111. The wedge block 512 is connected to the guide rail 5111 through the groove 5121 so that the wedge block 512 can slide horizontally along the guide rail 5111.

[0126] In order to fix the pressing plate mechanism 51, in some embodiments of the present invention, a threaded base 517 is provided at the bottom of the slide rail seat 511, and the threaded base 517 is welded to the same horizontal plane and at the same height as the bottom plate 524 below the rotating shaft support assembly 52. ​​The top end surface of the threaded base 517 is a horizontal plane, and the slide rail seat 511 is fixed to the top end surface of the threaded base 517 by screws.

[0127] In order to achieve the installation of the pressing plate 513 , in some embodiments of the present invention, the pressing plate 513 includes a pressing portion and a connecting portion 333 that are integrally formed.

[0128] The connecting portion 333 is disposed on one side of the wedge block 512 in the width direction, and includes a first connecting section and a second connecting section that are bent in sequence. The first connecting section is fixedly connected to the slide rail seat 511 by screws, and the second connecting section is in contact with the wedge block 512 .

[0129] The pressing portion is located above the wedge block 512 , and is formed with a pressing working surface opposite to the top end surface of the wedge block 512 .

[0130] In some embodiments of the present invention, in order to enable the pressure plate 513 to better cooperate with the wedge block 512, the clamping working surface of the pressure plate 513 is an inclined surface, and the inclination direction of the clamping working surface is the same as the inclination direction of the top end surface of the wedge block 512, and the inclination angle of the clamping working surface matches the inclination angle of the top end surface of the wedge block 512.

[0131] In some embodiments of the present invention, in order to maintain the balance of the entire frame fixing support device 5 and improve the stability and bearing capacity of the overall structure, the pressure plate mechanism 51 and the shaft support assembly 52 each include two.

[0132] The two pressing plate mechanisms 51 are arranged opposite to each other and are respectively fixed to one end of the two opposite bottom beams 41 in the length direction; the two rotating shaft support assemblies 52 are arranged opposite to each other and are respectively fixed to the other end of the two opposite bottom beams 41 in the length direction.

[0133] The above-mentioned schematic embodiment solves the technical problem of the inconvenience in adjusting the relative heights of the two ends of the frame 4 of the steam drum dryer 2. Through the design of the pressure plate mechanism 51 and the shaft support assembly 52, stable support for the frame 4 can be achieved, and the angle can be adjusted, thereby improving the adaptability and stability of the frame 4.

[0134] In some embodiments of the present invention, as shown in the attached Fig.21 -Attached Fig.23 As shown, it further includes a dryer feed port sealing device 6. The feed port sealing device 6 includes a second sealing cylinder 61 and a third end cover 62. The second sealing cylinder 61 is sleeved on the outside of the first sealing cylinder 18, and its diameter is larger than the diameter of the dryer feed port. One end close to the feed port of the drum dryer 2 is fixedly connected to the machine wall outside the feed port of the drum dryer 2; an annular gap is formed between the inner wall of the second sealing cylinder 61 and the outer wall of the first sealing cylinder 18. An annular limiting portion 611 protruding from the inner wall of the cylinder is provided on the inner wall of the second sealing cylinder 61.

[0135] The third end cover 62 is annularly arranged and fixed to an end of the second sealing cylinder 61 away from the drum dryer 2 to at least partially close the annular gap between the inner wall of the second sealing cylinder 61 and the outer wall of the first sealing cylinder 18 .

[0136] An elastic sealing ring 63 is arranged in the annular gap to form a seal between the second sealing cylinder 61 and the first sealing cylinder 18. The elastic sealing ring 63 is made of fluororubber material, specifically an elastic packing ring made of PTFE polytetrafluoroethylene material. In this embodiment, the elastic sealing ring 63 made of fluororubber material has high high temperature resistance and corrosion resistance, is suitable for high temperature and corrosive environments, is conducive to improving the durability of the sealing device, and at the same time, its elasticity can also meet the relative runout tolerance requirements between the second sealing cylinder 61 and the first sealing cylinder 18.

[0137] When only one annular limiting portion 611 is provided, it is spaced apart from the third end cover 62 , and a rectangular groove is formed between the annular limiting portion 611 and the third end cover 62 .

[0138] The elastic sealing ring 63 includes multiple elastic sealing rings 63, which are arranged in a rectangular groove between the three end covers 62 and the annular limiting portion 611. The elastic sealing rings 63 located at both ends are respectively in contact with the third end cover 62 and the annular limiting portion 611 to be limited by the third end cover 62 and the annular limiting portion 611 respectively. The multiple elastic sealing rings 63 form a seal between the inner wall of the second sealing tube 61 and the outer wall of the first sealing tube 18.

[0139] When at least two annular limiting portions 611 are arranged at intervals, a rectangular groove is formed between the annular limiting portion 611 close to the third end cover 62 and the third end cover 62, and between two adjacent annular limiting portions 611. It should be noted that when more than two annular limiting portions 611 are arranged at intervals, the distances between adjacent annular limiting portions 611 may be the same or different.

[0140] The elastic sealing rings 63 include a plurality of elastic sealing rings 63 , which are arranged in each rectangular groove to form a seal between the inner wall of the second sealing cylinder 61 and the outer wall of the first sealing cylinder 18 .

[0141] Among them, the position of the elastic sealing ring 63 and the number of elastic sealing rings 63 in each rectangular groove can be selected according to the size and runout tolerance of the first sealing cylinder 18 and the feed port of the drum dryer. In this embodiment, three elastic sealing rings 63 are arranged in each rectangular groove.

[0142] The above-mentioned schematic embodiment solves the technical problem that the wet coal slime is squeezed out from the connection between the dryer and the first sealing cylinder 18 due to the thermal expansion and contraction and relative vibration of the first sealing cylinder 18 in the drum dryer 2 and the screw conveyor 1 during the coal slime drying process. By winding multiple circles of elastic sealing ring 63 in the gap between the second sealing cylinder 61 and the first sealing cylinder 18, a seal is effectively formed between the first sealing cylinder 18 of the screw conveyor 1 and the feed port of the drum dryer 2, thereby preventing the wet coal slime from being squeezed out from the connection and reducing environmental pollution during the coal slime drying process.

[0143] In some embodiments of the present invention, when the feed amount of wet coal slime increases, in order to avoid the "material return" phenomenon at the feed port of the drum dryer 2, one end of the first sealing cylinder 18 extends into the inner cavity of the drum dryer 2 through the feed port of the drum dryer 2, and the length of the first sealing cylinder 18 extending into the inner cavity of the drum dryer 2 is greater than the length of the feeding spiral cylinder 11 extending into the inner cavity of the drum dryer 2, so as to prevent most of the coal slime from falling into the first sealing cylinder 18.

[0144] In some embodiments of the present invention, in order to enhance the elasticity of the elastic sealing ring 63, the elastic sealing ring 63 is a hollow structure. Specifically, the cross-sectional shape of the elastic sealing ring 63 is a hollow circle, oval, square or rectangle. The hollow elastic sealing ring 63 can better meet the relative runout tolerance requirements of the dryer and the first sealing cylinder 18, which helps to improve the sealing performance. On the other hand, it can also reduce the overall weight of the sealing device and reduce the material cost.

[0145] In some embodiments of the present invention, in order to achieve the connection between the third end cover 62 and the second sealing cylinder, an annular fixing portion 612 is provided at one end of the second sealing cylinder 61 away from the dryer, and the third end cover 62 is connected to the annular fixing portion 612 by screws.

[0146] In some embodiments of the present invention, in order to improve the overall strength of the sealing device, the second sealing cylinder 61 and the annular fixing portion 612 are an integrated structure.

[0147] In order to improve the flexibility of disassembling the third end cover 62, in some embodiments of the present invention, as shown in the attached Figure 3 As shown, the third end cover 62 is composed of at least two arc-shaped portions 621 , and cutouts are processed between adjacent arc-shaped portions 621 .

[0148] In order to reduce the friction and wear between the third end cover 62 and the outer wall of the second sealing tube 61 and extend the service life of the sealing device, in some embodiments of the present invention, the end surface of the third end cover 62 close to the outer wall of the first sealing tube 18 is spaced apart from the outer wall of the first sealing tube 18.

[0149] In order to ensure the balance of the installation of the sealing device and further reduce the wear of the sealing device, in some embodiments of the present invention, the second sealing cylinder 61 is coaxially arranged with the first sealing cylinder 18 .

[0150] In some embodiments of the present invention, a fan is further included, which is arranged in a cyclone dust collector 7 and is used to absorb the water vapor evaporated by the drying of the coal slime in the drum dryer 2. An air outlet is opened on the wall of the first sealing cylinder 18, and the air suction port of the fan is connected to the air outlet through the exhaust pipe 8, and then communicated with the exhaust channel.

[0151] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0152] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A coal slime drying system, characterized in that: include: Screw conveyors, drum dryers and pushers; The drum dryer is provided with a feed inlet; The screw conveyor comprises a feeding screw cylinder and a first sealing cylinder; The feed spiral drum is provided with a discharge end, and the discharge end of the feed spiral drum extends into the inner cavity of the drum dryer through the feed inlet of the drum dryer; The first sealing cylinder is sleeved on the discharge end of the feeding spiral cylinder, one end of the first sealing cylinder is connected to the feeding port of the drum dryer, and the other end is connected to the feeding spiral cylinder; An exhaust passage communicating with the inner cavity of the drum dryer is formed between the cylinder wall of the first sealing cylinder and the cylinder wall of the feeding spiral cylinder; The pushing device comprises a first driving mechanism and a pushing mechanism; The first driving mechanism is mounted on the feeding spiral barrel, the pushing mechanism is connected with the driving mechanism, the pushing end of the pushing mechanism is arranged in the exhaust passage, and moves back and forth along the exhaust passage under the driving of the driving mechanism.

2. The coal slime drying system according to claim 1, characterized in that: The first driving mechanism includes a driving member and a transmission member; The transmission member is connected to the power output end of the driving member, and the transmission member is provided with a thread; The pushing mechanism comprises a pushing rod and a pushing plate; One end of the push rod is arranged in the exhaust passage; the outer wall of the push rod is provided with a thread, and the thread of the outer wall of the push rod is meshed with the thread of the transmission member to convert the radial rotation of the transmission member driven by the driving member into the axial movement of the push rod; The push plate is arranged in the exhaust passage and connected with the push rod.

3. The coal slime drying system according to claim 1, characterized in that: The screw conveyor further includes a second driving mechanism and a screw conveying assembly; the screw conveying assembly is arranged in the feed screw barrel, the second driving mechanism is arranged at one end of the feed screw barrel, and the power output end of the second driving mechanism is connected to the screw conveying assembly for driving the screw conveying assembly to rotate radially in the feed screw barrel.

4. The coal slime drying system according to claim 3, characterized in that: The second driving mechanism includes a driving motor, a reducer, a coupling and a bearing assembly; The reducer is installed on the power output shaft of the driving motor; one end of the coupling is transmission-connected to the reducer; the bearing assembly is arranged between the feed screw barrel and the coupling; one end of the end of the spiral conveying assembly passes through the bearing assembly and is transmission-connected to the coupling.

5. The coal slime drying system according to claim 1, characterized in that: The central axis of the drum body of the drum dryer is arranged at a predetermined angle with the horizontal plane, and the first sealing cylinder is arranged coaxially with the drum body of the drum dryer.

6. The coal slime drying system according to claim 1 or 5, characterized in that: Further comprising a rack and a rack fixing support device; The screw conveyor is fixed above the frame, and the frame fixing support device is fixed below the frame; The frame includes at least one group of relatively arranged bottom beams; the frame fixing support device includes a pressure plate mechanism and a rotating shaft support assembly; the pressure plate mechanism and the rotating shaft support assembly are respectively arranged at both ends of the bottom beam, and form a predetermined height difference at both ends of the frame in the length direction.

7. The coal slime drying system according to claim 6, characterized in that: The pressing plate mechanism is slidably connected to the bottom cross beam, and the rotating shaft support assembly is rotatably connected to the bottom cross beam.

8. The coal slime drying system according to claim 1, characterized in that: Further comprising a dryer feed inlet sealing device; The sealing device includes a second sealing cylinder, which is sleeved on the first sealing cylinder and connected to the drum dryer at one end thereof close to the feed port of the drum dryer; an annular gap is formed between the inner wall of the second sealing cylinder and the outer wall of the first sealing cylinder; an elastic sealing ring is arranged in the annular gap to form a seal between the second sealing cylinder and the first sealing cylinder.

9. The coal slime drying system according to claim 1, characterized in that: One end of the first sealing cylinder extends into the inner cavity of the drum dryer through the feed port of the drum dryer, and the length of the first sealing cylinder extending into the inner cavity of the drum dryer is greater than the length of the feed spiral cylinder extending into the inner cavity of the drum dryer.

10. The coal slime drying system according to claim 1, characterized in that: It further comprises a fan, wherein the air suction port of the fan is connected with the exhaust channel through a pipeline.

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