CN213194452U - Combined coal grinding steel ball sieve convenient for maintaining and replacing sieve body - Google Patents

Abstract

The utility model discloses a make things convenient for combination formula coal grinding steel ball sieve of screen frame maintenance and change has solved how to prolong steel ball sieve life and has saved the problem of screening cost. On steel ball sieve support (1), from bottom to top, be provided with lower floor screen frame (2) that to the right slope respectively, middle level screen frame (3) that inclines backward and upper screen frame (4) that inclines forward, middle level screen frame (3) and upper screen frame are the drawer type, and the structure of middle level screen frame is the same with the structure of upper screen frame (4) completely, the upper screen frame comprises rectangle drawer type frame plate (7) and trapezoidal baffle box (8), be provided with afterbody screw thread (16) at the afterbody of screening billet (14), the tail end of the screening billet of taking anticreep major structure (15), from the past backward, after passing front side baffle horizontal rectangular hole (12) and rear side baffle horizontal rectangular hole (13), the spiro union is in the same place with outside lock nut (18). The service life of the screen body is prolonged.

Description

Combined coal grinding steel ball sieve convenient for maintaining and replacing sieve body

Technical Field

The utility model relates to a steel ball sieve, in particular to a combination formula steel ball sieve that is used for sieving the coal-grinding steel ball of steel ball coal mill.

Background

The steel ball coal mill is one of four auxiliary machines of the thermal power station, it is through the steel ball of different size models in the cylinder, break and grind the coal briquette into the machinery of the pulverized coal, the mode of grinding mainly includes crushing, breaking and grinding three kinds of modes enter, in crushing, breaking and grinding course, the steel ball in the cylinder is worn and torn constantly, the volume of the steel ball is reduced constantly, make the quantity of the small steel ball in the cylinder increase constantly, lead to the coal mill to exert oneself and reduce; according to the operation regulation, after the steel ball coal mill runs for 2500-plus 3000 hours, the machine is stopped, steel balls in the cylinder are taken out, steel ball screening is carried out, small steel balls with the diameter smaller than 20-2 mm and metal wastes are cleaned, then large-size steel balls are supplemented, the steel balls are placed back into the cylinder for continuous use, the conventional steel ball screening is carried out by using sieves with different models, screening is carried out once from large to small, or picking and classification are manually observed, so that the labor force is increased while the classification is uneven, and the cost is increased; in the prior art, a classifying screen is adopted, different screen bodies are integrated on a screen frame, the screen body with the largest specification gap is arranged at the uppermost layer, the screen body with the medium specification is arranged in the middle, the screen body with the smallest specification is arranged at the lowermost layer, the steel ball taken out is placed into the screen body on the uppermost layer, and the steel ball is placed to flow from top to bottom, so that the screening of the steel balls with three specifications is realized at one time.

Disclosure of Invention

The utility model provides a make things convenient for combination formula coal grinding steel ball sieve of screen frame maintenance and change has solved how to prolong steel ball sieve life and has saved the technical problem of screening cost.

The utility model discloses a solve above technical problem through following technical scheme:

a combined coal grinding steel ball sieve convenient for sieve body maintenance and replacement comprises a steel ball sieve support, a lower-layer sieve body inclined to the right, a middle-layer sieve body inclined to the rear and an upper-layer sieve body inclined to the front are respectively arranged on the steel ball sieve support from the bottom to the top, a feeding funnel is arranged above the upper-layer sieve body, a large steel ball discharging port separated by sieving is arranged on a front side plate of the feeding funnel, the middle-layer sieve body and the upper-layer sieve body are drawer-type, the structure of the middle-layer sieve body is completely the same as that of the upper-layer sieve body, the upper-layer sieve body is composed of a rectangular drawer type frame plate and a trapezoidal guide groove, the trapezoidal guide groove is connected on a front baffle plate of the rectangular drawer type frame plate, a baffle hole is arranged on a front end bottom plate of the trapezoidal guide groove, a front baffle plate horizontal long hole is arranged on the front baffle plate, a rear baffle plate horizontal long hole is arranged on a rear side plate of the rectangular drawer type frame plate, between the horizontal rectangular hole of front side shelves and the horizontal rectangular hole of rear side shelves, the activity cross-under has the screening billet, is provided with the afterbody screw thread at the afterbody of screening billet, and the tail end of the screening billet of taking the anticreep major part is backward in the past, after passing front side shelves horizontal rectangular hole and the horizontal rectangular hole of rear side shelves in proper order, with outside lock nut spiro union together.

The length of the tail end of the screening steel bar with the tail threads is 150 mm, and the tail threads are in threaded connection with inner side locking nuts.

The utility model discloses a change of upper and middle screen frame is convenient, can conveniently adjust the interval of screening billet according to the diameter requirement of screening steel ball, has prolonged the life of screen frame, has simplified the maintenance and the maintenance of screen frame.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural diagram of the upper-layer screen body 4 of the present invention;

fig. 3 is a schematic structural view of the front side baffle 10 of the upper screen body 4 of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

a combined coal grinding steel ball sieve convenient for sieve body maintenance and replacement comprises a steel ball sieve support 1, a lower-layer sieve body 2 inclined to the right, a middle-layer sieve body 3 inclined to the rear and an upper-layer sieve body 4 inclined to the front are respectively arranged on the steel ball sieve support 1 from bottom to top, a feeding funnel 5 is arranged above the upper-layer sieve body 4, a large steel ball discharging port 6 for sieving is arranged on a front side plate of the feeding funnel 5, the middle-layer sieve body 3 and the upper-layer sieve body 4 are drawer type, the structure of the middle-layer sieve body 3 is completely the same as that of the upper-layer sieve body 4, the upper-layer sieve body 4 is composed of a rectangular drawer type frame plate 7 and a trapezoidal guide chute 8, the trapezoidal guide chute 8 is connected on a front side baffle plate 10 of the rectangular drawer type frame plate 7, a material leaking port 9 is arranged on a front end bottom plate of the trapezoidal guide chute 8, a front side baffle plate horizontal strip hole 12 is arranged on the front side baffle plate 10, the rear baffle plate 11 of the rectangular drawer type frame plate 7 is provided with a rear baffle plate horizontal long hole 13, a screening steel bar 14 is movably connected between the front baffle plate horizontal long hole 12 and the rear baffle plate horizontal long hole 13 in a penetrating mode, the tail of the screening steel bar 14 is provided with a tail thread 16, the tail end of the screening steel bar 14 with an anti-dropping big end 15 sequentially penetrates through the front baffle plate horizontal long hole 12 and the rear baffle plate horizontal long hole 13 from front to back, and then is in threaded connection with an outer side locking nut 18.

The length of the tail end of the screen steel strip 14 having the tail screw 16 is 150 mm, and an inner lock nut 17 is screwed to the tail screw 16.

Firstly, a rectangular drawer type frame plate 7 is manufactured, water flat strip-shaped through holes are processed on a front side baffle plate 10 and a rear side baffle plate 11 of the rectangular drawer type frame plate 7 respectively, screening steel bars 14 are manufactured, anti-drop large heads 15 are arranged at the heads of the screening steel bars 14, tail threads 16 are arranged at the tail ends of the screening steel bars 14, the distance between two adjacent screening steel bars 14 on an upper layer of the screen is determined according to the most type of steel balls required by a coal mill, after the position of each screening steel bar 14 on the upper layer of the screen is determined, the position of each screening steel bar 14 on the rectangular drawer type frame plate 7 is fixed by rotating an inner side locking nut 17 and an outer side locking nut 18, then an upper layer screen 4 with a trapezoidal guide groove 8 is inserted on a steel ball screen support 1, and the forward inclination angle of the screen is 35 degrees; the structure of the lower layer screen body 2 and the structure of the middle layer screen body 3 are completely the same as the structure of the upper layer screen body 4, and the parts are identical except that: the distance between two adjacent screening steel bars 14 on the middle layer screen body 3 is smaller than that of the upper layer screen body, and the distance between two adjacent screening steel bars 14 on the lower layer screen body 2 is smaller than that of the middle layer screen body, and the distances are determined according to the diameter of a medium-sized steel ball and the diameter of a small-sized steel ball in the coal mill; each layer of screen body can be provided with a movable splash-proof movable baffle, and the steel balls screened out enter into respective special steel ball bags through discharge chutes on the screen bodies.

When the screen body is used, if a certain screening steel bar 14 is damaged, only the screen body is taken out, and after the outer locking nut 18 and the inner locking nut 17 on the screen body are loosened, the screen body is replaced singly, the three layers of screen bodies have the same structure, the manufacturing procedures of the screen body are greatly reduced, and the screen body is convenient to manufacture and replace.

Claims (2)

1. A combined coal grinding steel ball sieve convenient for sieve body maintenance and replacement comprises a steel ball sieve support (1), a lower-layer sieve body (2) inclined to the right, a middle-layer sieve body (3) inclined to the rear and an upper-layer sieve body (4) inclined to the front are respectively arranged on the steel ball sieve support (1) from bottom to top, a feeding funnel (5) is arranged above the upper-layer sieve body (4), and a large steel ball discharging port (6) separated by sieving is arranged on a front side plate of the feeding funnel (5), and is characterized in that the middle-layer sieve body (3) and the upper-layer sieve body (4) are drawer type, the structure of the middle-layer sieve body (3) is completely the same as that of the upper-layer sieve body (4), the upper-layer sieve body (4) is composed of a rectangular drawer type frame plate (7) and a trapezoid material guide groove (8), the trapezoid material guide groove (8) is connected on a front side baffle plate (10) of the rectangular drawer type frame plate (7), the material leakage device is characterized in that a material leakage opening (9) is formed in a front end bottom plate of a trapezoid material guide groove (8), a front side baffle plate horizontal long hole (12) is formed in a front side baffle plate (10), a rear side baffle plate horizontal long hole (13) is formed in a rear side baffle plate (11) of a rectangular drawer type frame plate (7), a screening steel bar (14) is movably connected between the front side baffle plate horizontal long hole (12) and the rear side baffle plate horizontal long hole (13) in a penetrating mode, tail threads (16) are arranged at the tail portion of the screening steel bar (14), the tail end of the screening steel bar (14) with an anti-falling large head (15) sequentially penetrates through the front side baffle plate horizontal long hole (12) and the rear side baffle plate horizontal long hole (13) from front to back, and then is connected with an outer side locking nut (18) in a threaded mode.

2. The combined type steel ball screen for milling coal, which facilitates the maintenance and replacement of the screen body, as claimed in claim 1, wherein the length of the tail end of the screening steel bar (14) with the tail thread (16) is 150 mm, and the tail thread (16) is screwed with the inner locking nut (17).

Images