CN111672752A - Double-shaft dewatering screen and method for sand washing boat - Google Patents
Double-shaft dewatering screen and method for sand washing boat Download PDFInfo
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- CN111672752A CN111672752A CN202010340088.7A CN202010340088A CN111672752A CN 111672752 A CN111672752 A CN 111672752A CN 202010340088 A CN202010340088 A CN 202010340088A CN 111672752 A CN111672752 A CN 111672752A
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- dewatering screen
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- dewatering
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- 239000004576 sand Substances 0.000 title claims abstract description 38
- 238000005406 washing Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 claims abstract description 6
- 230000018044 dehydration Effects 0.000 claims description 16
- 238000006297 dehydration reaction Methods 0.000 claims description 16
- 230000003247 decreasing effect Effects 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000002337 anti-port Effects 0.000 claims description 2
- 238000012216 screening Methods 0.000 abstract description 12
- 238000001914 filtration Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 25
- 230000005484 gravity Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/34—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen
- B07B1/343—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen with mechanical drive elements other than electromagnets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
- B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention discloses a double-shaft dewatering screen and a method of a sand washing boat, belonging to the technical field of dewatering screens, and comprising a dewatering screen frame, a dewatering screen, a first driving shaft assembly, a second driving shaft assembly and a water tank, wherein the middle part of the dewatering screen frame is provided with the dewatering screen, the lower end of the dewatering screen is provided with the water tank, and the first driving shaft assembly and the second driving shaft assembly are arranged above the dewatering screen; the first driving shaft assembly comprises a main shaft, a driving motor, an eccentric wheel, an eccentric block, a sleeve and a mounting plate, one end of the main shaft is connected with a motor shaft of the driving motor through a coupling, the other end of the main shaft is fixedly connected with the semicircular eccentric wheel, and the eccentric block is connected to the eccentric wheel through a bolt in a locking mode. The vibration is realized by the centrifugal force generated by the rotation of the eccentric wheel, the vibration amplitude is large, the operation is stable, the noise is low, the screening efficiency is improved, and the filtering area is large.
Description
Technical Field
The invention relates to the technical field of dewatering screens, in particular to a double-shaft dewatering screen and a method for a sand washing boat.
Background
And crushing and screening stones in the sand making field to prepare the sand. The raw material stone contains mud and other media, and is washed by water in the crushing and screening processes. At the moment, the sand contains a large amount of mud, water and other media, the requirement of finished sand can be met only by dewatering, desliming and medium removing, and whether the dewatering, desliming and medium removing are clean determines the grade of the sand. On the other hand, the efficiency and capacity of the dewatering screen are also required to be as high as possible.
The patent number is CN201820137332.8 provides a biax dewatering screen, including bottom plate and dewatering screen box, the bottom plate front end links together through second shock-absorbing structure and dewatering screen box, and the bottom plate rear end links together through first shock-absorbing structure and dewatering screen box, dewatering screen box rear end is fixed with the shelves flitch, the bottom plate right side is fixed with the base, and base top middle part is fixed with the support frame, support frame top rear end is fixed with first driving motor, and first driving motor links together through the first eccentric shaft pole of shaft coupling and installation on the curb plate, be fixed with the stiffener on the curb plate of second driving motor side. The structure sets up rationally, through using biax eccentric excitation, combines the oil bath lubrication, and the hydraulic oil that wear-resistants is increased and decreased regularly of being convenient for, generally speaking, changes once half a year, reduces the plant maintenance cost, and dewatering screen work that carries on that can be better promotes the development of dewatering screen trade. But adopt the mode that the motor drove biax corotation to work among the biax dewatering screen, vibration range is low during the screening, and dehydration efficiency is low.
The existing dewatering screen adopts electromagnetic vibration or vibration generated by a vibration motor, water, mud and media are leaked into a water tank through a filter screen, and sand is conveyed to the next procedure through vibration. The dewatering screen is an automatic device used for carrying out dry or wet screening, dewatering, medium removing and desliming on materials with medium or fine granularity. It is widely used in coal dressing, ore making, building material and chemical industry. Because the vibration force generated by the electromagnetic vibration or the vibration motor is smaller, the existing vibrating screen has small current size specification, low dehydration, desliming and medium removal efficiency and low conveying speed, so that the dehydration capacity is not high, the screening efficiency is low, the processing capacity is low, and the maximum capacity of the largest-size dehydrating screen of the existing dehydrating screen can only reach 80 cubic meters per hour.
Disclosure of Invention
The invention aims to provide a double-shaft dewatering screen and a double-shaft dewatering screen method for a sand washing boat, which realize vibration by adopting centrifugal force generated by rotation of an eccentric wheel, have large vibration amplitude, stable operation, low noise, improved screening efficiency and large filtering area and solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a double-shaft dewatering screen of a sand washing boat comprises a dewatering screen frame, a dewatering screen, a first driving shaft assembly, a second driving shaft assembly and a water tank, wherein the dewatering screen is installed in the middle of the dewatering screen frame, the water tank is arranged at the lower end of the dewatering screen, and the first driving shaft assembly and the second driving shaft assembly are arranged above the dewatering screen;
first main drive shaft subassembly and second main drive shaft subassembly structure are unanimous, first main drive shaft subassembly includes main shaft, driving motor, eccentric wheel, eccentric block, sleeve and mounting panel, main shaft one end has driving motor's motor shaft through the coupling joint, and other end fixed connection is by semicircular eccentric wheel, there are one to three eccentric blocks through bolt locking connection on the eccentric wheel, the sleeve has been cup jointed to the outside of eccentric wheel and eccentric block, sleeve fixedly connected with mounting panel.
Further, the dehydration screen frame includes support column, striker plate and bottom plate, and the bottom plate is located the lower extreme of water tank, and the four corners of bottom plate has welded the support column respectively, and the both sides fixedly connected with striker plate of dehydration screen cloth has first main drive axle subassembly and second main drive axle subassembly through bearing swivelling joint between two striker plates, and the left end of striker plate is the pan feeding mouth, and the right-hand member is the discharge gate, and the fixed axle is all installed to pan feeding mouth and discharge gate department, and the both ends of fixed axle are connected with the support column through fixed subassembly.
Further, the eccentric block comprises a common block, the eccentric block is positioned in the middle of the eccentric wheel, and the edge of the eccentric block is aligned with the edge of the eccentric wheel.
Furthermore, the eccentric block comprises three blocks, the three eccentric blocks are mutually overlapped in the middle of the eccentric wheel, and the edge of each eccentric block is aligned with the edge of the eccentric wheel.
Further, the fixing assembly comprises a connecting plate and a clamping ring, a fixing shaft is sleeved in the middle of the clamping ring, the clamping ring is welded on the upper surface of the connecting plate, and a spring is installed between the connecting plate and the supporting column.
Furthermore, the mesh number of the dewatering screen is gradually increased from the feed port to the discharge port.
According to another aspect of the present invention there is provided a method of bi-axial dewatering of a sand washing vessel, comprising the steps of:
s101: mounting the end with the smaller mesh number of the dewatering screen at the material inlet, and mounting the end with the larger mesh number at the material outlet;
s102: the eccentric amount of the eccentric wheel is adjusted by increasing or decreasing the number of the eccentric blocks, so that the vibration force is adjusted;
s103: two driving motor work drive first main drive axle subassembly and second main drive axle subassembly antiport respectively, and dewatering screen cloth pan feeding mouth department is opposite with the vibration direction of discharge gate department, and dewatering screen cloth vibrations drive silt vibrations dehydration.
Further, in S103, the main shaft of the first main driving shaft assembly rotates clockwise, and the main shaft of the second main driving shaft assembly rotates counterclockwise.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a double-shaft dewatering screen and a method of a sand washing boat, wherein vibration is realized by centrifugal force generated by rotation of an eccentric wheel, when the eccentric wheel rotates upwards to the centrifugal force, the resilience force of a spring and the centrifugal force act on a dewatering screen upwards at the same time, when the eccentric wheel rotates downwards to the centrifugal force, the gravity of the dewatering screen and the centrifugal force of the eccentric wheel together enable the dewatering screen to exert downward force, the dewatering screen vibrates up and down, the vibration amplitude is large, the operation is stable, the noise is low, the eccentric amount of the eccentric wheel can be adjusted by adjusting the number of eccentric blocks, two main shafts are arranged up and down and rotate reversely, the vertical vibration amplitude of the dewatering screen is further enhanced, the size of the machine is large, the efficiency is high, the productivity can reach 250 cubic meters per hour;
2. a double-shaft dewatering screen and a method for a sand washing boat adopt a unique dewatering screen design, the number of the dewatering screens at a feeding port is small, the water flow throughput is improved, the number of the dewatering screens at a discharging port is large, a small amount of water content in silt is finely screened, the screening efficiency is improved, and the filtering area is large.
Drawings
FIG. 1 is a front view of a dual shaft dewatering screen of a sand wash vessel of the present invention;
FIG. 2 is a top view of a dual shaft dewatering screen of the sand wash vessel of the present invention;
FIG. 3 is a first main drive shaft assembly structure of a double-shaft dewatering screen of a sand washing boat in accordance with a first embodiment of the present invention;
FIG. 4 is an assembly view of the eccentric wheel of the double-shaft dewatering screen of the sand washing boat in the first embodiment of the present invention;
FIG. 5 is an exploded view of the eccentric wheel of the double-shaft dewatering screen of the sand washing vessel according to the first embodiment of the present invention;
FIG. 6 is an eccentric wheel assembly view of a double-shaft dewatering screen of a sand washing boat in accordance with a second embodiment of the present invention;
FIG. 7 is an exploded view of the eccentric wheel of the double-shaft dewatering screen of the sand washing boat in the second embodiment of the present invention;
fig. 8 is a flow chart of a method of biaxial dewatering for a sand wash vessel of the present invention.
In the figure: 1. a dewatering screen frame; 11. a support pillar; 12. a striker plate; 121. a feeding port; 122. a discharge port; 123. a fixed shaft; 124. a fixing assembly; 1241. a connector tile; 1242. a snap ring; 125. a spring; 13. a base plate; 2. a dewatering screen; 3. a first main drive shaft assembly; 31. a main shaft; 32. a drive motor; 33. an eccentric wheel; 34. an eccentric block; 35. a sleeve; 36. mounting a plate; 4. a second main drive shaft assembly; 5. a water tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1 to 2, a double-shaft dewatering screen of a sand washing boat comprises a dewatering screen frame 1, a dewatering screen 2, a first driving shaft assembly 3, a second driving shaft assembly 4 and a water tank 5, wherein the dewatering screen 2 is installed in the middle of the dewatering screen frame 1, the mesh number of the dewatering screen 2 is gradually increased from a material inlet 121 to a material outlet 122, a unique design of the dewatering screen 2 is adopted, the mesh number of the dewatering screen 2 at the material inlet 121 is small, the water flow throughput is improved, the mesh number of the dewatering screen 2 at the material outlet 122 is large, a small amount of water content in silt is finely screened, the screening efficiency is improved, the filtering area is large, the water tank 5 is arranged at the lower end of the dewatering screen 2, the first driving shaft assembly 3 and the second driving shaft assembly 4 are arranged above the dewatering screen 2, the dewatering screen frame 1 comprises supporting columns 11, a material baffle 12 and a bottom plate 13, the bottom plate 13 is positioned at the lower end of the water, the two sides of the dewatering screen 2 are fixedly connected with baffle plates 12, a first driving shaft assembly 3 and a second driving shaft assembly 4 are rotatably connected between the two baffle plates 12 through bearings, the left end of each baffle plate 12 is a material inlet 121, the right end of each baffle plate 12 is a material outlet 122, a fixed shaft 123 is respectively arranged at the material inlet 121 and the material outlet 122, two ends of each fixed shaft 123 are connected with supporting columns 11 through fixed assemblies 124, each fixed assembly 124 comprises a connecting plate 1241 and a clamping ring 1242, the middle part of each clamping ring 1242 is sleeved with the fixed shaft 123, each clamping ring 1242 is welded on the upper surface of the corresponding connecting plate 1241, a spring 125 is arranged between each connecting plate 1241 and each supporting column 11, an unbalanced centrifugal force is generated when the eccentric wheel 33 rotates, when the eccentric wheel 33 rotates to the centrifugal force upwards, the dewatering screen 2 is upwards lifted by the centrifugal force, when the eccentric wheel 33 rotates to the centrifugal force downwards, the gravity, the spring 125 below the dewatering screen 2 is compressed and the spring 125 springs back to provide a springback force.
Referring to fig. 3 to 5, the first driving shaft assembly 3 and the second driving shaft assembly 4 have the same structure, the first driving shaft assembly 3 includes a main shaft 31, a driving motor 32, an eccentric wheel 33, an eccentric block 34, a sleeve 35 and a mounting plate 36, one end of the main shaft 31 is connected to a motor shaft of the driving motor 32 through a coupling, the other end is fixedly connected to the semicircular eccentric wheel 33, the eccentric block 34 is connected to the eccentric wheel 33 through a bolt, the eccentric block 34 includes a total one, the eccentric block 34 is located in the middle of the eccentric wheel 33, the edge of the eccentric block 34 is aligned with the edge of the eccentric wheel 33, the sleeve 35 is sleeved outside the eccentric wheel 33 and the eccentric block 34, the sleeve 35 is fixedly connected to the mounting plate 36, vibration is realized by a centrifugal force generated by rotation of the eccentric wheel 33, when the eccentric wheel 33 rotates upwards, the resilient force and the centrifugal force of the, when the eccentric wheel 33 rotates to the centrifugal force downwards, the gravity of the dewatering screen 2 and the centrifugal force of the eccentric wheel 33 together enable the dewatering screen 2 to exert force downwards, the dewatering screen 2 vibrates up and down, the vibration amplitude is large, the operation is stable, the noise is low, the eccentric amount of the eccentric wheel 33 can be adjusted by adjusting the number of the eccentric blocks 34, the two main shafts 31 are arranged up and down and rotate reversely, the vertical vibration amplitude of the dewatering screen 2 is further enhanced, the size of the machine is large, the efficiency is high, the yield is high, and the yield can reach 250 cubic meters per hour.
Referring to fig. 8, in order to better show the process of the biaxial dehydration of the sand washing vessel, the present embodiment now proposes a method of biaxial dehydration of the sand washing vessel, comprising the following steps:
s101: the end with the smaller mesh number of the dewatering screen 2 is arranged at the material inlet 121, and the end with the larger mesh number is arranged at the material outlet 122;
s102: the eccentric amount of the eccentric wheel 33 is adjusted by increasing or decreasing the number of the eccentric blocks 34, thereby adjusting the vibration force;
s103: two driving motor 32 works and drives first main drive shaft subassembly 3 and second main drive shaft subassembly 4 counter rotation respectively, and dewatering screen 2 pan feeding mouth 121 department is opposite with the vibration direction of discharge gate 122 department, and dewatering screen 2 vibrations drive silt vibrations dehydration, and the main shaft 31 clockwise rotation of first main drive shaft subassembly 3, the main shaft 31 anticlockwise rotation of second main drive shaft subassembly 4.
Example two:
referring to fig. 1 to 2, a double-shaft dewatering screen of a sand washing boat comprises a dewatering screen frame 1, a dewatering screen 2, a first driving shaft assembly 3, a second driving shaft assembly 4 and a water tank 5, wherein the dewatering screen 2 is installed in the middle of the dewatering screen frame 1, the mesh number of the dewatering screen 2 is gradually increased from a material inlet 121 to a material outlet 122, a unique design of the dewatering screen 2 is adopted, the mesh number of the dewatering screen 2 at the material inlet 121 is small, the water flow throughput is improved, the mesh number of the dewatering screen 2 at the material outlet 122 is large, a small amount of water content in silt is finely screened, the screening efficiency is improved, the filtering area is large, the water tank 5 is arranged at the lower end of the dewatering screen 2, the first driving shaft assembly 3 and the second driving shaft assembly 4 are arranged above the dewatering screen 2, the dewatering screen frame 1 comprises supporting columns 11, a material baffle 12 and a bottom plate 13, the bottom plate 13 is positioned at the lower end of the water, the two sides of the dewatering screen 2 are fixedly connected with baffle plates 12, a first driving shaft assembly 3 and a second driving shaft assembly 4 are rotatably connected between the two baffle plates 12 through bearings, the left end of each baffle plate 12 is a material inlet 121, the right end of each baffle plate 12 is a material outlet 122, a fixed shaft 123 is respectively arranged at the material inlet 121 and the material outlet 122, two ends of each fixed shaft 123 are connected with supporting columns 11 through fixed assemblies 124, each fixed assembly 124 comprises a connecting plate 1241 and a clamping ring 1242, the middle part of each clamping ring 1242 is sleeved with the fixed shaft 123, each clamping ring 1242 is welded on the upper surface of the corresponding connecting plate 1241, a spring 125 is arranged between each connecting plate 1241 and each supporting column 11, an unbalanced centrifugal force is generated when the eccentric wheel 33 rotates, when the eccentric wheel 33 rotates to the centrifugal force upwards, the dewatering screen 2 is upwards lifted by the centrifugal force, when the eccentric wheel 33 rotates to the centrifugal force downwards, the gravity, the spring 125 below the dewatering screen 2 is compressed and the spring 125 springs back to provide a springback force.
Referring to fig. 3 to 5, the first driving shaft assembly 3 and the second driving shaft assembly 4 have the same structure, the first driving shaft assembly 3 includes a main shaft 31, a driving motor 32, an eccentric wheel 33, an eccentric block 34, a sleeve 35 and a mounting plate 36, one end of the main shaft 31 is connected to a motor shaft of the driving motor 32 through a coupling, the other end is fixedly connected to the semicircular eccentric wheel 33, the eccentric block 34 is tightly connected to the eccentric wheel 33 through a bolt, the eccentric block 34 includes three eccentric blocks 34, the three eccentric blocks 34 are mutually overlapped in the middle of the eccentric wheel 33, the edge of the eccentric block 34 is aligned with the edge of the eccentric wheel 33, the sleeve 35 is sleeved outside the eccentric wheel 33 and the eccentric block 34, the sleeve 35 is fixedly connected to the mounting plate 36, the vibration is realized by using the centrifugal force generated by the rotation of the eccentric wheel 33, when the eccentric wheel 33 rotates upwards, the resilience force of the spring 125, when the eccentric wheel 33 rotates to the centrifugal force downwards, the gravity of the dewatering screen 2 and the centrifugal force of the eccentric wheel 33 together enable the dewatering screen 2 to exert force downwards, the dewatering screen 2 vibrates up and down, the vibration amplitude is large, the operation is stable, the noise is low, the eccentric amount of the eccentric wheel 33 can be adjusted by adjusting the number of the eccentric blocks 34, the two main shafts 31 are arranged up and down and rotate reversely, the vertical vibration amplitude of the dewatering screen 2 is further enhanced, the size of the machine is large, the efficiency is high, the yield is high, and the yield can reach 250 cubic meters per hour.
Referring to fig. 8, in order to better show the process of the biaxial dehydration of the sand washing vessel, the present embodiment now proposes a method of biaxial dehydration of the sand washing vessel, comprising the following steps:
s101: the end with the smaller mesh number of the dewatering screen 2 is arranged at the material inlet 121, and the end with the larger mesh number is arranged at the material outlet 122;
s102: the eccentric amount of the eccentric wheel 33 is adjusted by increasing or decreasing the number of the eccentric blocks 34, thereby adjusting the vibration force;
s103: two driving motor 32 works and drives first main drive shaft subassembly 3 and second main drive shaft subassembly 4 counter rotation respectively, and dewatering screen 2 pan feeding mouth 121 department is opposite with the vibration direction of discharge gate 122 department, and dewatering screen 2 vibrations drive silt vibrations dehydration, and the main shaft 31 clockwise rotation of first main drive shaft subassembly 3, the main shaft 31 anticlockwise rotation of second main drive shaft subassembly 4.
The working principle is as follows: vibration is realized by centrifugal force generated by rotation of the eccentric wheel 33; when the eccentric wheel 33 rotates, an unbalanced centrifugal force is generated, when the eccentric wheel 33 rotates to the centrifugal force to move upwards, the centrifugal force lifts the dewatering screen 2 upwards, when the eccentric wheel 33 rotates to the centrifugal force to move downwards, the gravity of the dewatering screen 2 and the centrifugal force of the eccentric wheel 33 together make the dewatering screen 2 exert force downwards, the spring 125 below the dewatering screen 2 is compressed, and the spring 125 rebounds to provide a rebound force; when the eccentric wheel 33 rotates to the centrifugal force upwards, the resilience force of the spring 125 and the centrifugal force simultaneously act on the dewatering screen 2 upwards, and when the eccentric wheel 33 rotates to the centrifugal force downwards, the gravity of the dewatering screen 2 and the centrifugal force of the eccentric wheel 33 together make the dewatering screen 2 exert force downwards, so that the dewatering screen 2 vibrates upwards and downwards.
In summary, the following steps: the invention provides a double-shaft dewatering screen and a method of a sand washing boat, vibration is realized by centrifugal force generated by rotation of an eccentric wheel 33, when the eccentric wheel 33 rotates upwards to the centrifugal force, the resilience force of a spring 125 and the centrifugal force act on a dewatering screen 2 upwards at the same time, when the eccentric wheel 33 rotates downwards to the centrifugal force, the gravity of the dewatering screen 2 and the centrifugal force of the eccentric wheel 33 together make the dewatering screen 2 exert force downwards, the dewatering screen 2 vibrate up and down, the vibration amplitude is large, the operation is stable, the noise is low, the eccentric amount of the eccentric wheel 33 can be adjusted by adjusting the number of eccentric blocks 34, two main shafts 31 are arranged up and down and rotate reversely, the vertical vibration amplitude of the dewatering screen 2 is further enhanced, the size of the machine is large, the efficiency is high, the productivity is high, and the capacity can reach 250 cubic meters; adopt unique dehydration screen 2 design, the dehydration screen 2 mesh number of pan feeding mouth 121 department is less, improves the rivers throughput, and the dehydration screen 2 mesh number of discharge gate 122 department is great, and a small amount of water content in the meticulous screening silt improves screening efficiency, and filter area is big.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (8)
1. The double-shaft dewatering screen of the sand washing boat is characterized by comprising a dewatering screen frame (1), a dewatering screen (2), a first driving shaft assembly (3), a second driving shaft assembly (4) and a water tank (5), wherein the dewatering screen (2) is installed in the middle of the dewatering screen frame (1), the water tank (5) is arranged at the lower end of the dewatering screen (2), and the first driving shaft assembly (3) and the second driving shaft assembly (4) are arranged above the dewatering screen (2);
first main drive shaft subassembly (3) and second main drive shaft subassembly (4) structure are unanimous, first main drive shaft subassembly (3) include main shaft (31), driving motor (32), eccentric wheel (33), eccentric block (34), sleeve (35) and mounting panel (36), main shaft (31) one end has the motor shaft of driving motor (32) through the coupling joint, and other end fixed connection is by semicircular eccentric wheel (33), there are one to three eccentric blocks (34) on eccentric wheel (33) through bolt locking connection, sleeve (35) have been cup jointed to the outside of eccentric wheel (33) and eccentric block (34), sleeve (35) fixed connection has mounting panel (36).
2. The double-shaft dewatering screen of the sand washing boat as claimed in claim 1, wherein the dewatering screen frame (1) comprises support columns (11), baffle plates (12) and a bottom plate (13), the bottom plate (13) is located at the lower end of the water tank (5), the support columns (11) are welded at four corners of the bottom plate (13) respectively, the baffle plates (12) are fixedly connected to two sides of the dewatering screen (2), a first driving shaft assembly (3) and a second driving shaft assembly (4) are connected between the two baffle plates (12) through bearings in a rotating mode, the left end of each baffle plate (12) is a feeding port (121), the right end of each baffle plate is a discharging port (122), fixing shafts (123) are installed at the feeding ports (121) and the discharging ports (122), and the support columns (11) are connected to two ends of each fixing shaft (123) through fixing assemblies (124).
3. A twin-shaft dewatering screen for a sand washing vessel according to claim 1, characterised in that the eccentric blocks (34) comprise a common block and the eccentric blocks (34) are located in the centre of the eccentric (33), the edge of the eccentric blocks (34) being aligned with the edge of the eccentric (33).
4. A twin-shaft dewatering screen for a sand washing vessel according to claim 1, characterised in that the eccentric mass (34) comprises three blocks in total and that the three blocks (34) are superimposed on each other in the middle of the eccentric (33), the edges of the blocks (34) being aligned with the edges of the eccentric (33).
5. The double-shaft dewatering screen for a sand wash vessel according to claim 2, wherein the fixing assembly (124) comprises a joint plate (1241) and a snap ring (1242), a fixing shaft (123) is sleeved in the middle of the snap ring (1242), the snap ring (1242) is welded to the upper surface of the joint plate (1241), and a spring (125) is installed between the joint plate (1241) and the support pillar (11).
6. The double-shaft dewatering screen of a sand washing vessel as claimed in claim 1, characterised in that the mesh size of the dewatering screen (2) increases from the inlet opening (121) to the outlet opening (122).
7. A method of bi-axial dewatering of a sand washing vessel according to any of the claims 1-6, characterized in that it comprises the steps of:
s101: the end with the smaller mesh number of the dewatering screen (2) is arranged at the feed inlet (121), and the end with the larger mesh number is arranged at the discharge outlet (122);
s102: the eccentric amount of the eccentric wheel (33) is adjusted by increasing or decreasing the number of the eccentric blocks (34), so that the vibration force is adjusted;
s103: two driving motors (32) work and drive first main driving shaft subassembly (3) and second main driving shaft subassembly (4) antiport respectively, and dewatering screen (2) pan feeding mouth (121) department is opposite with the vibration direction of discharge gate (122) department, and dewatering screen (2) vibrations drive silt vibrations dehydration.
8. A method of twin-shaft dewatering of a sand washing vessel according to claim 7, characterised in that in S103 the main shaft (31) of the first main drive shaft assembly (3) rotates clockwise and the main shaft (31) of the second main drive shaft assembly (4) rotates anticlockwise.
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