CN105964540A

CN105964540A - Screen cleaning method and device of drum screen

Info

Publication number: CN105964540A
Application number: CN201610432562.2A
Authority: CN
Inventors: 王建忠; 詹建新
Original assignee: Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2016-06-17
Filing date: 2016-06-17
Publication date: 2016-09-28
Anticipated expiration: 2036-06-17
Also published as: CN105964540B

Abstract

The invention discloses a screen cleaning method of a drum screen, and belongs to the field of material screening in the coking industry. The screen cleaning method comprises the process that a screen body is cleaned in the manner that the screen body is beaten by weights in the screen body rotating process of the drum screen. The screen cleaning method is characterized in that the beating frequency of the weights to the screen body is that the screen body is beaten at least two times when the screen body turns one circle. The screen body is beaten with the certain frequency to complete the screen cleaning process, abrasion of the screen body and a screen cleaning mechanism can be reduced through screen cleaning in the beating manner, and the screen cleaning effect can be best by controlling the beating frequency.

Description

The cleaning method and device of rotary screen

Technical field

The present invention relates to the material screening field for coking industry, a kind of cleaning method of rotary screen.

Background technology

During coke-oven plant is used for separating nut coke and coke powder, the sieve aperture using rotary screen is about 10mm, the moister easy blocking sieve aperture of coke powder in operation, conventional sieve cleaning mechanism is comb-tooth-type, and sieve nest is cleaned with water by comb-tooth-type sieve cleaning mechanism continuously, makes sieve cleaning mechanism easily damage, need to be replaced after running a period of time, the most just will result in cleaning effect bad, sieve nest blocks, and impact produces.

Summary of the invention

The technical issues that need to address of the present invention are to provide a kind of abrasion minimum to sieve nest and sieve cleaning mechanism cleaning effect more preferable cleaning method and device simultaneously.

For solving above-mentioned technical problem, the technical solution adopted in the present invention is:

The cleaning method of rotary screen, the mode tapped sieve nest with weight in sieve nest rotary course including rotary screen carries out clearing up the process of sieve nest, it is characterised in that: it is that sieve nest every revolution taps at least 2 times that described weight taps the frequency of sieve nest.

Further improvement is that of technical solution of the present invention: it is apart from the lower section lateral location that sieve nest summit circumferential distance is 150 ~ 250mm that described weight taps the position of sieve nest.

Further improvement is that of technical solution of the present invention: axially arranged at least two baffle plates on sieve nest, the surface wire rope suspensioning weight of described sieve nest, the traction radius of described steel wire rope is 1200 ~ 1800mm, and it is apart from the lower section lateral location that sieve nest summit circumferential distance is 150 ~ 250mm that described weight taps the position of sieve nest.

Further improvement is that of technical solution of the present invention: described weight is provided with multiple, and keep at a certain distance away and be suspended on the support directly over sieve nest.

Further improvement is that of technical solution of the present invention: the length that the plurality of weight is suspended on support is different, it hangs length and changes in the range of 10 ~ 100mm.

Further improvement is that of technical solution of the present invention: the spacing that the plurality of weight is suspended on support is 200 ~ 650mm.

Further improvement is that of technical solution of the present invention: the plurality of weight interval of mid portion on support is more than the interval of two end portions.

Owing to have employed technique scheme, the technological progress that the present invention obtains is:

The present invention uses certain frequency that sieve nest carries out percussion and completes cleaning process, taps mode cleaning and can reduce the abrasion of sieve nest and sieve cleaning mechanism, controls to tap frequency and cleaning effect can be made to reach best.

The position that the present invention uses weight to tap sieve nest is the position that sieve nest just turns over summit, it is possible to more preferably ensure cleaning effect；With the weight of the wire rope suspensioning certain mass of certain length directly over sieve nest, make sieve nest drive weight to complete the bounce-back to weight during rotating, make weight automatically carry out tapping work；Length according to sieve nest arranges multiple weight and taps it, and arranges the arrangement mode that weight is different, and the damage protecting sieve nest and sieve cleaning mechanism i.e. weight to receive while ensureing cleaning effect to greatest extent is minimum.

Accompanying drawing explanation

Fig. 1 is the present invention main TV structure schematic diagram；

Fig. 2 is side-looking structural representation of the present invention；

Wherein, 1, sieve nest, 2, weight, 3, steel wire rope, 4, support, 5, baffle plate.

Detailed description of the invention

Below in conjunction with embodiment, the present invention is described in further details:

The cleaning method of rotary screen, with weight 2, the mode that sieve nest 1 taps is carried out in sieve nest 1 rotary course the process of cleaning sieve nest 1 including rotary screen, during percussion, weight 2 is point cantact with contacting of sieve nest 1, tap the abrasion to sieve nest 1 and weight 2 each time can ignore, so can increase equipment life；Rotating speed according to sieve nest 1 and the order of severity of adhesive, arranging weight 2 is that sieve nest 1 every revolution taps at least 2 times to the FREQUENCY CONTROL that sieve nest 1 taps, sieve nest 1 every revolution taps the adhesive that can make on sieve nest 1 for 3 times and i.e. is shaken after bottom forwards top to, it is ensured that sieve nest 1 not material to be bonded blocks and can normally work；Control weight 2 tapping the control mode of sieve nest 1 can be the automated manner such as electronic, pneumatic.

Such as Fig. 1, shown in Fig. 2, sieve nest 1 radius being conventionally used for separating coke powder is generally 1.2 ~ 1.8m, and the rotating speed of rotary screen is 10 ~ 18 turns per minute, arrange weight 2 to contact with sieve nest 1 side point, contact point is below the summit of sieve nest 1, and the summit circumferential distance of distance sieve nest 1 is 150 ~ 250mm, when the adhesive carried in sieve nest 1 rotates to summit, entrained adhesive it is also possible under self gravitation effect self falling, after adhesive turns over sieve nest 1 summit, adhesive does not just have the possible of self falling, tapping sieve nest 1 by external force can make the maximally effective removing of weight 2 be bonded at the adhesive on sieve nest 1 herein.

As shown in Figure 1 and Figure 2, the quality of weight 2 is 5 ~ 15kg and draws with steel wire rope 3, weight 2 oscillating motion on the circumference that radius is 1200 ~ 1800mm, sieve nest 1 peripheral, axial is uniformly arranged at least two baffle plates 5 and to protrude the distance of sieve nest 1 be 25 ~ 35mm, weight 2 is upspring 80 ~ 120mm by sieve nest 1 baffle plate 5 in rotary course, the weight 2 upspring circumferentially move under the common effect of the centripetal force of self gravitation and steel wire rope 3 80 ~ 120mm displacement after tap on sieve nest 1；So circulation just achieves weight 2 and taps the number of times quantity equal to baffle plate 5 of sieve nest 1 in sieve nest 1 every revolution, during weight 2 swing, steel wire rope 3 is reduced to 10 ~ 20 ° with the angle of vertical line by 25 ~ 35 °, under the control of weight 2 mass, it is ensured that the weight 2 percussion dynamics to sieve nest 1.

As shown in Figure 1 and Figure 2, weight 2 is provided with multiple, and on the support 4 being suspended on 1000 ~ 1600mm directly over sieve nest 1 that keeps at a certain distance away, multiple weights 2 ensure that sieve nest 1 everywhere is the most cleaned and arrive.

As shown in Figure 1 and Figure 2, the length that multiple weights 2 are suspended on support 4 is different, it hangs length and changes in the range of 10 ~ 200mm, different suspension length makes sieve nest 1 multiple weights 2 in operation process tap the time difference of sieve nest 1, weight 2 can tap on sieve nest 1 one by one continuously, makes sieve nest 1 be at all the time, in the middle of cleaned, increasing cleaning effect, avoid weight 2 percussion simultaneously can cause excessive shock power to sieve nest 1, it is to avoid to damage sieve nest 1 simultaneously.

As shown in Figure 1 and Figure 2, it is 200 ~ 650mm that the plurality of weight 2 is suspended on the spacing on support 4, and multiple weights 2 ensure that sieve nest 1 everywhere is the most cleaned and arrive；The spacing of weight 2 is the most effective scope tapping sieve nest 1 in the range of 200 ~ 650mm, more than 650mm spacing, then percussion dynamics between two weights 2 is not enough, then cause two weights 2 too near less than 200mm spacing and enough height can not be repelled, again result in the dynamics deficiency making percussion sieve nest 1, arranging weight 2 and tapping the spacing optimum of sieve nest 1 is 400mm, so ensure that percussion maximally effective to sieve nest 1.

As shown in Figure 1 and Figure 2, the spacing that described weight 2 is suspended on support 4 is 200 ~ 400mm in each 1/4 position, support 4 both sides, and the spacing that described weight 2 is suspended on support 4 is 400 ~ 650mm in support 4 centre position；The interval that multiple weights 2 are suspended on support 4 is different, on support 4, the interval of mid portion is more than the interval of two end portions, elasticity due to sieve nest 1 mid portion is more than the elasticity of two end portions, tap potential energy that the weight 2 at sieve nest 1 mid portion obtains more than the weight 2 of two end portions, tap dynamics just larger relative to two end portions of sieve nest 1 mid portion each time, so arranging the weight 2 weight 2 less than sieve nest 1 two end portions of sieve nest 1 mid portion, the percussion dynamics making sieve nest 1 obtain is uniform, the transition to sieve nest 1 is avoided to tap, cleaning work is completed while the protection sieve nest 1 of maximum possible.

Claims

1. the cleaning method of rotary screen, with weight (2), the mode that sieve nest (1) taps is carried out in sieve nest (1) rotary course the process of cleaning sieve nest (1) including rotary screen, it is characterised in that: it is that sieve nest (1) every revolution taps at least 2 times that described weight (2) taps the frequency of sieve nest (1).

The cleaning method of rotary screen the most according to claim 1, it is characterised in that: it is apart from the lower section lateral location that sieve nest (1) summit circumferential distance is 150 ~ 250mm that described weight (2) taps the position of sieve nest (1).

3. the screen cleaning device of rotary screen, it is characterized in that: upper axially arranged at least two baffle plates (5) of sieve nest (1), surface steel wire rope (3) suspension heavy weight (2) of described sieve nest (1), the traction radius of described steel wire rope (3) is 1200 ~ 1800mm, and it is apart from the lower section lateral location that sieve nest (1) summit circumferential distance is 150 ~ 250mm that described weight (2) taps the position of sieve nest (1).

The screen cleaning device of rotary screen the most according to claim 3, it is characterised in that: described weight (2) is provided with multiple, and on the support (4) being suspended on sieve nest (1) surface that keeps at a certain distance away.

The screen cleaning device of rotary screen the most according to claim 4, it is characterised in that: the length that the plurality of weight (2) is suspended on support (4) is different, and it hangs length and changes in the range of 10 ~ 100mm.

The screen cleaning device of rotary screen the most according to claim 4, it is characterised in that: the spacing that the plurality of weight (2) is suspended on support (4) is 200 ~ 650mm.

The screen cleaning device of rotary screen the most according to claim 6, it is characterised in that: the plurality of weight (2) is more than the interval of two end portions at the interval of the upper mid portion of support (4).