Vacuum dehydration belt conveyor

Abstract

The invention discloses a vacuum dewatering belt conveyor, which belongs to the technical field of coal dewatering and comprises a rack, a driving roller and a driven roller are respectively mounted at two ends of the rack, and an outer-layer belt and an inner-layer belt are driven between the driving roller and the driven roller; a plurality of dewatering holes are formed in the surface of the outer-layer adhesive tape; raised shoulders distributed at intervals are arranged on the surface, facing the outer-layer adhesive tape, of the inner-layer adhesive tape, and a vent hole is formed between every two adjacent raised shoulders; and vacuum chambers which are distributed between the upper layer and the lower layer of the double-layer dewatering adhesive tape group and are communicated with the vent holes are also mounted in the rack. The vacuum dehydration belt conveyor can be directly transformed on the basis of a traditional belt conveyor, the transformation cost is low, and the transformed equipment has a coal transportation function and a coal dehydration function; compared with a common vibrating screen and roller screen dewatering mode, the vacuum dewatering belt conveyor has the advantages of being small in occupied area, small in height space, small in investment, easy to install, maintain, operate and manage and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of coal dehydration, and particularly to a vacuum dehydration belt conveyor. Background Art

[0002] In underground coal mines, during the coal mining process, water gushing often occurs, and the water enters the mined coal, posing a great safety hazard to underground coal transportation and hoisting. To eliminate the safety hazard, the current main solution is to install vibrating dehydration screens and roller screens in the transportation roadway for dehydration.

[0003] There are mainly the following problems in installing vibrating dehydration screens and roller screens for dehydration in the transportation link:

[0004] I. It occupies a large area. The head of the belt conveyor, the head chute, the dehydration screen, the chute under the dehydration screen, the tail of the transfer belt conveyor, plus the equipment installation and maintenance hoisting equipment, the total height is more than ten meters. This makes the construction and support of underground roadways difficult and costly, and there are great safety hazards in roadway construction and support for mines with poor geological conditions.

[0005] II. The investment is large. Due to the large floor area and height space, the cost of roadway development is high; generally, two-stage dehydration is required to meet the dehydration index, and the equipment is large-scale and costly.

[0006] III. The dehydration efficiency is low. Due to the limitation of the processing capacity of the screen, when the instantaneous coal flow rate is large and the water content is high, the dehydration index cannot be achieved.

[0007] IV. The installation and removal are difficult. Since the equipment is large-scale, from being transported into the well along the roadway to the installation site, due to the limitation of the underground space, the installation and construction are difficult, costly, and the installation period is long; the same problems are encountered in the overhaul and removal of the equipment. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a vacuum dehydration belt conveyor with a small floor area, low transformation cost, high dehydration rate, and convenient installation and removal.

[0009] The technical solution of the present invention is realized as follows:

[0010] A vacuum dehydration belt conveyor includes a frame, and a driving roller and a driven roller are respectively installed at two ends of the frame. A double-layer dehydration belt group is jointly driven between the driving roller and the driven roller;

[0011] The double-layer dehydration belt group includes an outer belt and an inner belt;

[0012] A plurality of dewatering holes are arranged in a matrix distribution on the belt surface of the outer belt; on the belt surface of the inner belt facing the outer belt, spaced-apart raised shoulders are provided, and ventilation holes are also arranged between every two adjacent raised shoulders;

[0013] Inside the frame, a vacuum chamber is also installed between the upper and lower layers of the double-layer dewatering belt group and is connected to the ventilation holes.

[0014] With the above scheme, the vacuum dewatering belt conveyor can be directly transformed on a traditional belt conveyor, with relatively low transformation cost. The transformed equipment has both the function of coal transportation and the function of coal dewatering; when the coal is dewatered, the vacuum chamber is in a negative pressure state, and the water in the coal sequentially passes through the dewatering holes and ventilation holes and enters the vacuum chamber, with high dewatering efficiency; compared with the traditional dewatering process, the vacuum dewatering belt conveyor has less investment, is convenient for installation and maintenance, and has simple operation and management.

[0015] As a preferred implementation mode of the vacuum dewatering belt conveyor, the end of the raised shoulder facing the outer belt is a round head.

[0016] With the above scheme, in order to make the fit between the outer belt and the inner belt better, after the outer belt is lifted by the raised shoulders of the inner belt, it is convenient for flowing dewatering. By using an arc-shaped raised shoulder, the fit between the outer belt and the inner belt will be better when they are in contact.

[0017] As a preferred implementation mode of the vacuum dewatering belt conveyor, the dewatering holes are trumpet-shaped holes, and their cross-section is an isosceles trapezoid, where the aperture of the dewatering hole facing outwards is smaller than the aperture facing inwards; the ventilation holes are trumpet-shaped holes, and their cross-section is an isosceles trapezoid, where the aperture of the ventilation hole facing outwards is smaller than the aperture facing inwards.

[0018] With the above scheme, in order to prevent the dewatering holes and ventilation holes from being blocked, both the dewatering holes and the ventilation holes are set as trumpet-shaped holes. At this time, impurities are not easily stuck in the dewatering holes or ventilation holes, making it not easy for the two to be blocked.

[0019] As a preferred implementation mode of the vacuum dewatering belt conveyor, the vacuum chamber is funnel-shaped; the top of the vacuum chamber is in contact with the inner belt through a sealing strip, and the bottom of the vacuum chamber is connected to a vacuum tank beside the frame;

[0020] The vacuum chamber is connected to a water collecting pipe through a plurality of steel wire hoses, and the water collecting pipe is then connected to the vacuum tank;

[0021] A steam-water separator is installed on the vacuum tank;

[0022] Two or more pneumatic valves are also installed on the vacuum tank.

[0023] By adopting the above scheme, the vacuum tank provides a vacuum environment, and the design of the vacuum tank and the gas-water separator is adopted, so that the water and fine particles can be separated into gas, matter and water, and the water and fine particles can be discharged quickly.

[0024] As a preferred embodiment of a vacuum dehydration belt conveyor, guide rollers are installed at both ends of the frame, and the two guide rollers open the outer tape and the inner tape of the lower layer of the double-layer dehydration belt group up and down, and two high-pressure air sweepers are installed between the outer tape and the inner tape, and the two high-pressure air sweepers face the outer tape and the inner tape respectively.

[0025] By adopting the above scheme, in order to facilitate the cleaning of impurities between the outer tape and the inner tape, the outer tape and the inner tape of the lower layer of the double-layer dehydrated tape group are spread open up and down by the guide roller, and two high-pressure air sweepers are used to clean the outer tape and the inner tape respectively.

[0026] As a preferred embodiment of the vacuum dehydration belt conveyor, an electric brush cleaner is also installed at either end of the frame, and the brush of the electric brush cleaner can always act on the belt surface of the outer layer of the belt.

[0027] By adopting the above scheme, in order to facilitate the cleaning of the coal slag and the like remaining on the surface of the outer tape, an electric brush cleaner is used to clean it, which can effectively clean the coal slag and the like remaining on the surface of the outer tape.

[0028] After adopting the above technical solution, the beneficial effects of the present invention are:

[0029] 1. The vacuum dehydration belt conveyor can be directly modified on the traditional belt conveyor, and its modification cost is low. The modified equipment has both coal transportation and coal dehydration functions. When the coal is dehydrated, the vacuum chamber is in a negative pressure state, and the moisture in the coal enters the vacuum chamber through the dehydration holes and ventilation holes in turn, and its dehydration efficiency is high. Compared with the vibrating screen and roller screen dehydration process, the vacuum dehydration belt conveyor occupies a smaller area and height space, making it safer and more convenient to install or dismantle;

[0030] 2. In order to make the outer tape and the inner tape fit better, the outer tape is lifted up by the raised shoulder of the inner tape to facilitate flow and dehydration. The raised shoulder with curved surface makes the fit between the outer tape and the inner tape better when in contact.

[0031] 3. In order to avoid the clogging of the dehydration holes and the vent holes, the dehydration holes and the vent holes are both set as trumpet holes. At this time, impurities are not easy to get stuck in the dehydration holes or the vent holes, making it difficult for the two to be blocked;

[0032] 4. A vacuum environment is provided by a vacuum tank, and the design of the vacuum tank and the steam-water separator is adopted to achieve the separation of gas, material, and water for the discharged water and fine particle materials, and the water and fine particle materials are quickly discharged;

[0033] 5. In order to facilitate the cleaning of impurities between the outer tape and the inner tape, the outer tape and the inner tape of the lower layer of the double-layer dehydration tape group are opened up and down by a guide roller, and two high-pressure air cleaners are used to clean the outer tape and the inner tape respectively;

[0034] 6. In order to facilitate the cleaning of residues such as coal cinder on the surface of the outer tape, an electric brush cleaner is used to clean it, which can effectively clean the residues such as coal cinder on the surface of the outer tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a front view structural schematic diagram of a vacuum dehydration belt conveyor;

[0037] Figure 2 It is a top view structural schematic diagram of a vacuum dehydration belt conveyor;

[0038] Figure 3 It is a sectional schematic diagram along Figure 2 at A-A in

[0039] Figure 4 It is a sectional schematic diagram along Figure 3 at B-B in

[0040] Figure 5 It is a partial enlarged structural schematic diagram of the outer tape surface;

[0041] Figure 6 It is a sectional schematic diagram along Figure 5 at the place where the dehydration holes are located;

[0042] Figure 7 It is Figure 1 a partial structural schematic diagram of

[0043] Figure 8 It is Figure 2 a partial structural schematic diagram of

[0044] Markings in the figure: 1-frame; 2-driving roller; 3-driven roller; 4-outer tape; 5-inner tape; 6-dehydration hole; 7-raised shoulder; 8-vent; 9-vacuum chamber; 10-sealing strip; 11-vacuum tank; 12-steel hose; 13-water collecting pipe; 14-pneumatic valve; 15-guide roller; 16-high-pressure air cleaner; 17-electric brush cleaner; 18-motor; 19-reducer; 20-coupling. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figures 1 to 4 As shown, a vacuum dehydration belt conveyor comprises a frame 1, wherein a driving roller 2 and a driven roller 3 are respectively installed at both ends of the frame 1, and a double-layer dehydration belt group is jointly driven between the driving roller 2 and the driven roller 3, and the length of the double-layer dehydration belt group is usually not more than 30 meters; wherein the driving roller 2 is connected to a reducer 19 through a coupling 20, and the reducer 19 is driven to rotate by a motor 18; the double-layer dehydration belt group comprises an outer layer belt 4 and an inner layer belt 5; a plurality of dehydration holes 6 distributed in a matrix are provided on the belt surface of the outer layer belt 4; a convex shoulder 7 distributed at intervals is provided on the belt surface of the inner layer belt 5 facing the outer layer belt 4, and a vent hole 8 is also provided between each adjacent convex shoulder 7; a vacuum chamber 9 distributed between the upper and lower layers of the double-layer dehydration belt group and connected to the vent hole 8 is also installed inside the frame 1. The vacuum dehydration belt conveyor can be directly modified on the traditional belt conveyor, and its modification cost is relatively low. The modified equipment has both coal transportation function and coal dehydration function. When the coal is dehydrated, the vacuum chamber 9 is in a negative pressure state, and the moisture in the coal enters the vacuum chamber 9 through the dehydration holes 6 and the air holes 8 in turn, and its dehydration efficiency is high. Compared with the vibrating screen and roller screen dehydration processes, the vacuum dehydration belt conveyor occupies a small area and height space, requires less investment, is easy to maintain and overhaul, and is more convenient to install or dismantle.

[0047] like Figure 4 As shown, the end of the raised shoulder 7 facing the end of the outer tape 4 is an arc head. In order to make the outer tape 4 and the inner tape 5 better fit, the inner tape 5 is passed through the raised shoulder 7 to lift the outer tape 4 for easy flow and dehydration. The raised shoulder 7 with an arc surface is used, and the fit of the outer tape 4 and the inner tape 5 when in contact will be better.

[0048] like Figures 4 to 6As shown, the dehydration hole 6 is a flared hole, and its cross-section is an isosceles trapezoid, where the aperture of the dehydration hole 6 facing outward is smaller than its aperture facing inward; the ventilation hole 8 is a flared hole, and its cross-section is an isosceles trapezoid, where the aperture of the ventilation hole 8 facing outward is smaller than its aperture facing inward. In order to prevent the dehydration hole 6 and the ventilation hole 8 from being blocked, both the dehydration hole 6 and the ventilation hole 8 are set as flared holes. At this time, impurities are not easily stuck in the dehydration hole 6 or the ventilation hole 8, making it not easy for the two to be blocked.

[0049] As Figures 2 to 3 , Figure 7 shown, the vacuum chamber 9 is in a funnel shape; the top of the vacuum chamber 9 is in contact with the inner layer tape 5 through a sealing strip 10, and the bottom of the vacuum chamber 9 is connected to a vacuum tank 11 located beside the frame 1; the vacuum chamber 9 is connected to a water collecting pipe 13 through multiple steel wire hoses 12, and the water collecting pipe 13 is then connected to the vacuum tank 11; a steam-water separator is installed on the vacuum tank 11; two or more pneumatic valves 14 are also installed on the vacuum tank 11. The vacuum environment is provided by the vacuum tank 11, and with the design of the vacuum tank 11 and the steam-water separator, the separated water and fine particle materials are separated into gas, matter, and water, and the water and fine particle materials are quickly discharged.

[0050] As Figure 8 shown, guiding rollers 15 are respectively installed at both ends of the frame 1. The two guiding rollers 15 open the outer layer tape 4 and the inner layer tape 5 of the lower layer of the double-layer dehydration tape group up and down, and two high-pressure air sweepers 16 are installed between the outer layer tape 4 and the inner layer tape 5. The two high-pressure air sweepers 16 respectively face the outer layer tape 4 and the inner layer tape 5. In order to facilitate the cleaning of impurities between the outer layer tape 4 and the inner layer tape 5, the outer layer tape 4 and the inner layer tape 5 of the lower layer of the double-layer dehydration tape group are opened up and down by the guiding rollers 15, and the two high-pressure air sweepers 16 are used to clean the outer layer tape 4 and the inner layer tape 5 respectively.

[0051] As Figure 8 shown, an electric brush sweeper 17 is also installed at either end of the frame 1, and the brush of the electric brush sweeper 17 can always act on the tape surface of the outer layer tape 4. In order to facilitate the cleaning of residues such as coal cinder on the surface of the outer layer tape 4, the electric brush sweeper 17 is used to clean it, and the residues such as coal cinder on the surface of the outer layer tape 4 can be effectively cleaned.

[0052] The working principle of the present invention:

[0053] During application, the driving roller 2 is driven by the motor 18 to rotate, causing the double-layer dehydration belt group to rotate and convey, and the transportation of coal can be realized through the double-layer dehydration belt group. During transportation, when the water content in the coal is high and dehydration is required, a vacuum environment is provided by the vacuum tank 11. At this time, the vacuum chamber 9 is in a negative pressure state, and the water in the coal sequentially passes through the dehydration holes 6 and the ventilation holes 8 and enters the vacuum chamber 9. With the design of the vacuum tank 11 and the steam-water separator, the separated water and fine particle materials are separated into gas, solid, and water, and the water and fine particle materials are quickly discharged.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vacuum dehydration belt conveyor, comprising a frame, with a driving roller and a driven roller respectively installed at two ends of the frame, and a double-layer dehydration belt group is jointly driven between the driving roller and the driven roller; It is characterized in that: The double-layer dehydration belt group includes an outer layer belt and an inner layer belt; A number of dehydrating holes distributed in a matrix are formed on the belt surface of the outer layer belt; on the belt surface of the inner layer belt facing the outer layer belt, spaced convex shoulders are provided, and ventilation holes are also formed between every two adjacent convex shoulders; A vacuum chamber communicating with the ventilation holes is also installed inside the frame and is distributed between the upper and lower layers of the double-layer dehydration belt group.

2. The vacuum dewatering belt conveyor according to claim 1, wherein: The end of the convex shoulder facing the end where the outer layer belt is located is a round head.

3. The vacuum dewatering belt conveyor according to claim 2, wherein: The dehydrating hole is a flared hole, and its cross-section is an isosceles trapezoid, where the aperture of the dehydrating hole facing outward is smaller than its aperture facing inward.

4. The vacuum dewatering belt conveyor according to claim 3, wherein: The ventilation hole is a flared hole, and its cross-section is an isosceles trapezoid, where the aperture of the ventilation hole facing outward is smaller than its aperture facing inward.

5. The vacuum dewatering belt conveyor according to claim 1, characterized in that: The vacuum chamber is in a funnel shape; the top of the vacuum chamber is in contact with the inner layer belt through a sealing strip, and the bottom of the vacuum chamber is connected to a vacuum tank beside the frame.

6. The vacuum dewatering belt conveyor according to claim 5, characterized in that: The vacuum chamber is connected to a water collecting pipe through a plurality of steel wire hoses, and the water collecting pipe is then connected to the vacuum tank.

7. The vacuum dewatering belt conveyor according to claim 6, characterized in that: A steam-water separator is installed on the vacuum tank.

8. The vacuum dewatering belt conveyor according to claim 7, characterized in that: Two or more pneumatic valves are also installed on the vacuum tank.

9. The vacuum dewatering belt conveyor according to any one of claims 4-8, characterized in that: Guide rollers are respectively installed at two ends of the frame, and the outer layer belt and the inner layer belt of the lower layer of the double-layer dehydration belt group are opened up and down by the two guide rollers, and two high-pressure air sweepers are installed between the outer layer belt and the inner layer belt, and the two high-pressure air sweepers respectively face the outer layer belt and the inner layer belt.

10. The vacuum dewatering belt conveyor according to claim 9, wherein: An electric brush sweeper is also installed at any one end of the frame, and the brush of the electric brush sweeper can always act on the belt surface of the outer layer belt.

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