A kind of method and vibratory sieve tightening screen cloth fast
Technical field
The invention belongs to material screen selecting technology field, be specifically related to a kind of vibratory sieve.
Background technology
Enterprise extensively adopts vibratory sieve to select a point material.Conventional vibratory sieve comprises the structure members such as screen frame, lower screen frame, rack, screen cloth, the spring be connected with screen frame, vibrating motor.Carry out vibration screen by Vibration on Start-up motor, make small particles material pass screen cloth and leak down, large granular materials is just blocked on screen cloth.In vibratory sieve, screen cloth used generally adopts the braiding such as wire, nylon yarn to form.Screen cloth process is tightened as follows in prior art:
(1) new square mesh is applied ointment or plaster on rack, by bending after screen cloth leveling, apply ointment or plaster on rack outer wall after screen cloth is bent;
(2) first the screen cloth of below is tightened rear fastening bolt with pressure network circle fastening;
(3) then the screen cloth on top tightened rear fastening bolt with pressure network circle fastening, this process must ensure that the upper surface of screen cloth is smooth and collapse tight, needs repeatedly to regulate to tighten screen cloth.
(4) rack installing screen cloth is placed on vibrating body, the faying face between upper and lower screen frame adds sealing strip, prevent slurry seepage; With V-type beam ring, vibrating body, rack, upper screen frame are fixedly connected into an entirety again.
If screen cloth is lax after using a period of time, then need again screen frame to be taken off, according to above-mentioned 4 step operations, screen cloth is installed.Replacing screen cloth is wasted time and energy, so enterprise in use, if there is the situation that screen cloth is lax, because the work of tightening screen cloth is too loaded down with trivial details, thus can not tighten screen cloth by secondary again, change after screen cloth can only be waited to break down.
But in existing draping process, need experienced operative employee two people to coordinate and more than 40 minutes consuming time.Once need to change screen cloth in plant produced, just need to shut down.The time changing screen cloth is longer larger on producing the impact brought.
In industry, tighten for fast tightening screen cloth and carrying out secondary to screen cloth, never have solution well.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provides a kind of method and the vibratory sieve of tightening screen cloth fast, can tighten screen cloth fast when screen cloth is loose.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method tightening screen cloth fast, comprise screen frame and screen cloth, tensioning circle is set below screen cloth, makes when screen cloth relaxes tensioning circle move upward and lax screen cloth held out against further, realize tightening of screen cloth.
Preferably, screen frame is divided into screen frame and lower screen frame, and the interior diameter of lower screen frame is greater than the overall diameter of screen frame, and upper screen frame is fixed pressure network circle, the edge portions of screen cloth can be bent downwards after upper screen frame vertically falls.
Preferably, tensioning circle is positioned at lower screen frame, and tensioning circle connects jacking mechanism, drives tensioning circle to move up and by sieve screen tightening by the action of jacking mechanism.
Preferably, lower screen frame offers notch, tensioning circle connects one end of crozier, the other end of crozier is connected with jacking mechanism through after notch, moving up and down of jacking mechanism adopts screw-driven mode, by rotating screw thread pair, crozier is moved up and down, crozier moves upward and drives tensioning circle to move up and by sieve screen tightening.
Additionally provide a kind of vibratory sieve tightening screen cloth fast, comprise screen frame and screen cloth, arrange tensioning circle below screen cloth, tensioning circle is connected with jacking mechanism.
Preferably, screen frame is divided into screen frame and lower screen frame, and the interior diameter of lower screen frame is greater than the overall diameter of screen frame, and upper screen frame is fixed pressure network circle.
Preferably, chuck, turnbuckle, coupling nut and withstanding tight block are set in jacking mechanism; Chuck is fastened on screen frame, and turnbuckle screws in coupling nut, and lower screen frame offers notch, and one end of withstanding tight block is connected with coupling nut, the other end is connected with tensioning circle through notch.
Preferably, chuck is offered half notch, the upper end of turnbuckle can push in half notch.
Preferably, withstanding tight block is connected by hinge with coupling nut.
Preferably, jacking mechanism comprises pedestal, turnbuckle and C type crozier; Lower screen frame offers notch, and pedestal is fixed on screen frame outer wall, and the lower end of turnbuckle is placed on pedestal, adopts thread connection between turnbuckle and C type crozier, and the lower end of C type crozier connects tensioning circle.
Compared with prior art, the invention has the beneficial effects as follows:
1. owing to being fixedly installed pressure network circle in the bottom of upper screen frame, after the edge portions of screen cloth bends downwards, pile warp pressure network circle upwards bends again, can play the effect tightened further screen cloth, and screen cloth edge not easily loosens after twice oppositely bending.
2. owing to arranging tensioning circle below screen cloth, tensioning circle is connected with jacking mechanism, rotates handwheel and can drive tensioning circle moves thus screen cloth is held out against realization and tighten, only rotate handwheel and just can realize tightening continuously screen cloth in non-stop-machine situation.
3. screen cloth is after reverse twice bending, pressure network loop diameter is less than lower screen frame interior diameter in addition, pressure network circle on upper screen frame is crossed coincidence and is wrapped up completely by lower screen frame upper end, slurry can only vertically fall and can not leak in the faying face of upper and lower screen frame, can not leak into outside machine, without the need to re-using sealing ring.
4., because the middle position, bottom surface of lower screen frame raises up formation frustum, the accepted stock flowed down from screen cloth drops down downwards along frustum surrounding, can not deposit slurry bottom lower screen frame.
Accompanying drawing explanation
Fig. 1 is the structural perspective of first embodiment of the invention;
Fig. 2 is the structure top view of first embodiment of the invention;
Fig. 3 is the sectional view along E-E line in Fig. 2;
Fig. 4 is the partial enlarged drawing at F place in Fig. 3;
Fig. 5 is the structural perspective of second embodiment of the invention;
Fig. 6 is the structure front view of second embodiment of the invention;
Fig. 7 is the structure top view of second embodiment of the invention;
Fig. 8 is the sectional view along A-A line in Fig. 7
Fig. 9 is the partial enlarged drawing at B place in Fig. 8;
Figure 10 is the partial enlarged drawing at C place in Fig. 8;
Figure 11 is the partial enlarged drawing at D place in Fig. 8.
Be labeled as in figure:
1, upper screen frame; 2, lower screen frame; 2.1, frustum; 3, screen cloth; 4, the second flange; 5, jacking mechanism; 5.1, pedestal; 5.2, turnbuckle; 5.3, C type crozier; 5.4, pin joint; 5.5 chuck; 5.6 turnbuckle; 5.7 coupling nut; 5.8 withstanding tight block; 6, the first flange; 7, V-type bunching ring; 8, pressure network circle; 9, discharge gate; 10, tensioning circle.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described further:
Embodiment one
As shown in Figures 1 to 4, the main part of vibratory sieve includes screen frame 1, lower screen frame 2, screen cloth 3, pressure network circle 8 and tensioning circle 10.Tensioning circle 10 is arranged on below screen cloth 3, is fixedly installed pressure network circle 8 in the bottom of upper screen frame 2.The junction of upper and lower screen frame is provided with flange arrangement, and concrete connected mode is that the lower end of upper screen frame 1 is provided with the first flange 6, and the upper end of lower screen frame 2 is provided with the second flange 4.First flange 6 and the second flange 4 align, and the edge portions of screen cloth 3 is clamped by the first flange 6 and the second flange 4.The internal diameter of upper screen frame 1 is less than the internal diameter of lower screen frame 2, and when therefore the first flange 6 and the second flange 4 align, the first flange 6 inwardly will inevitably exceed a part thus form an annular boss structure.
Chuck 5.5, turnbuckle 5.6, coupling nut 5.7 and withstanding tight block 5.8 are set in jacking mechanism.Chuck 5.5 is fastened on screen frame 1, and turnbuckle 5.6 screws in coupling nut 5.7, and lower end and the withstanding tight block 5.8 of coupling nut 5.7 are hinged.Chuck 5.5 is offered half notch, and the upper end of turnbuckle 5.6 can push in half notch.Upper screen frame 1 offers notch, one end of withstanding tight block 5.8 is connected with coupling nut 5.7, the other end is connected with tensioning circle 10 through notch.
Below set forth using method of the present invention and the course of work:
When screen cloth 3 is installed, first screen cloth 3 is laid on rack, upper screen frame is vertically put down, the edge portions of screen cloth bends downwards along rack periphery by upper screen frame, then the edge of screen cloth is laid between upper and lower screen frame flange, then by V-type bunching ring 7, upper and lower screen frame flange is tightened to an entirety, fixedly completing of screen cloth.Then the screen cloth that stretches tight is started
That below sets forth screen cloth tightens process:
First the upper end of turnbuckle 5.6 is put into half notch in chuck 5.5, then rotate turnbuckle 5.6, turnbuckle 5.6 can not move down by the constraint of chuck 5.5, and coupling nut 5.7 can only be made to move upward, thus drive tensioning circle 10 to move up screen cloth to be held out against, completes the network process that stretches tight.In this process, pressure network circle 8 also serves auxiliary effect of tightening screen cloth.Even if screen cloth 3 in use loosens again, still tensioning circle 10 can be made to continue rising by rotation turnbuckle 5.2 and hold out against screen cloth 3.Just dismounting will be needed to retighten because screen cloth 3 loosens thus to tighten screen cloth 3, significantly improve service efficiency.
As shown in Figure 9, screen cloth 3 is after reverse twice bending, pressure network circle 8 external diameter is less than lower screen frame internal diameter in addition, pressure network circle 8 on upper screen frame 1 is crossed to overlap and is wrapped up completely by lower screen frame 2 upper end, slurry can only vertically fall and can not leak in the faying face of upper and lower screen frame, can not leak into outside machine, without the need to re-using sealing ring.
The middle position of the bottom surface of lower screen frame 2 raises up formation frustum 2.1 structure, and discharge gate 9 is opened in not protruding position, the bottom of lower screen frame 2.The accepted stock flowed down from screen cloth thus drops down downwards along frustum surrounding, can not deposit slurry bottom lower screen frame.
Embodiment two
Compared with embodiment one, in the present embodiment, jacking mechanism can adopt following scheme:
As shown in Fig. 5 to 11, jacking mechanism comprises pedestal 5.1, turnbuckle 5.2 and C type crozier 5.3; Lower screen frame 1 offers notch, and pedestal 5.1 is fixed on screen frame 1 outer wall, and turnbuckle 5.2 is vertically arranged on pedestal 5.1, and its lower end is processed with external screw thread; The upper end of C type crozier 5.3 is offered screwed hole and is connected by screw thread pair with turnbuckle 5.2, and the lower end of C type crozier 5.3 is connected with tensioning circle 10 through notch.
Although there is no direct fixed relationship between turnbuckle 5.2 and pedestal 5.1, because tensioning circle 10 can be contacted with screen cloth 3 and be held out against by pressure, be provided with three jacking mechanisms, therefore jacking mechanism 5 can firmly be fixed on screen frame simultaneously.In addition, the lower end bending segment of C type crozier 5.3 is set to articulated form, and is bolted.When working properly, screen cloth holds out against by pin joint 5.4 motion that tightly lock transmits upwards.When changing screen cloth, pin joint 5.4 loosens and makes the upper semisection of C type crozier 5.3 rotate around pin joint 5.4 thus turnbuckle 5.2 is departed from from pedestal 5.1, then pulls down screen frame 1 just replaceable screen cloth.
As the jacking mechanism driving tensioning circle to move up and down, except employing above-described embodiment scheme, multiple replacement scheme can also be had.Those of ordinary skill in the art without the need to scheme transformation can be carried out to jacking mechanism through creative work, such as: adopt hydraulic way jack-up tensioning circle, or the structure control mode of other screw-nuts.This belongs to the conventional alternative of this area, repeats no more.
The above is only preferred embodiment of the present invention, and be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solution of the present invention content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.