Screen shaft assembly of roller screen

Abstract

A screen shaft assembly of a roller screen relates to the field of roller screens. The sieve shaft assembly is mainly designed for solving the problem of material blockage caused by long-time operation of an existing sieve shaft assembly. The vibrating screen comprises a screen shaft, a plurality of screen pieces are fixed to the screen shaft, and bearing seats are installed at the two ends of the screen shaft in a matched mode. An upper limiting sleeve is arranged at the bottom of the bearing seat, a threaded hole is formed in the middle of the lower surface of the bottom of the bearing seat, the lower limiting sleeve is located on the inner side of the upper limiting sleeve, and the inner wall of the upper limiting sleeve is in sliding contact with the outer wall of the lower limiting sleeve; a base plate is fixed to the bottom of the lower limiting sleeve and connected to the machine body base through a bolt, holes are correspondingly formed in the machine body base and the base plate, and after the bolt extends into the upper limiting sleeve and the lower limiting sleeve through the holes of the machine body base and the base plate, the upper end of the bolt is in threaded connection with a threaded hole formed in the lower surface of the bearing seat. A spring is sleeved on the bolt between the base plate and the bearing seat, and a nut is screwed on the bolt on the outer side of the machine body base. The utility model has the advantage of reducing material sticking or material sticking.

Description

Technical field:

[0001] The utility model relates to the field of roller screens, in particular to a screen shaft assembly of a roller screen. Background technology:

[0002] The roller screen for screening coal is mainly suitable for coal-fired power plants. Since the coal used in boilers is usually unclassified raw coal, the particle size of raw coal mostly does not meet the requirements of boiler coal, so it is necessary to use the roller screen to screen the raw coal first. The small particle size can be used directly, and the large particle size can be crushed by the coal crusher to meet the needs of boiler combustion.

[0003] The existing roller screen consists of a housing with several screen shafts arranged in a series of descending heights. Each shaft is driven by a motor, and each is fitted with several screen plates. The plates on adjacent shafts interlock with each other. Coal enters through a feed port at the top rear end of the housing. Coal smaller than the rated screening size falls through the gaps between the plates and enters the belt conveyor below the screen. Coal larger than the rated screening size is discharged through an outlet at the rear end of the housing.

[0004] The existing roller screen's screen shaft assembly consists of a screen shaft, several screen plates fixed to the shaft, and bearing blocks supporting both ends of the shaft. These blocks are fixed to the base of the machine, and one end of the screen shaft is connected to the motor's output shaft via a coupling. Because the bearing blocks are fixed to the base, the screen shaft can only rotate, making it easy for coal to become trapped or stuck in the gaps between adjacent screen plates. This can cause blockages over extended periods of operation, requiring manual cleaning, which is both time-consuming and labor-intensive, and delays production. Summary of the invention:

[0005] The technical problem to be solved by the utility model is to provide a roller screen shaft assembly which prevents coal from being clamped or stuck in the gaps between adjacent screen pieces, thereby reducing the frequency of manual cleaning.

[0006] The purpose of this utility model is achieved in this way:

[0007] It includes a screen shaft, on which are fixed several screen plates, and bearing seats are fitted at both ends of the screen shaft; its characteristics are: an upper limit sleeve extending downward is added to the bottom of the bearing seat, a threaded hole is opened in the middle of the lower surface of the bottom of the bearing seat, and a lower limit sleeve is also included, the lower limit sleeve is located on the inner side of the upper limit sleeve and the inner wall of the upper limit sleeve is in sliding contact with the outer wall of the lower limit sleeve; a base plate is fixed to the bottom of the lower limit sleeve, the base plate is connected to the body base by bolts, and corresponding holes are provided on the body base and the base plate, and the bolts extend into the upper and lower limit sleeves through the holes of the body base and the base plate, and the upper ends of the bolts are threadedly connected to the threaded holes opened on the lower surface of the bearing seat, a spring is sleeved on the bolts between the base plate and the bearing seat, and a nut is screwed on the bolts located on the outside of the body base.

[0008] A hole with a diameter larger than the diameter of the screen shaft is provided at the position of the machine body corresponding to the extending portion of the screen shaft. The outer end of the annular rubber sealing cover is connected to the machine body outside the hole by bolts. The inner end of the rubber sealing cover is sleeved on the screen shaft. A circle of felt sealing ring is provided on the surface where the inner end of the rubber sealing cover contacts the screen shaft.

[0009] The utility model has the advantages that when the material enters the roller screen, the heavy material will cause the screen shaft to vibrate, which can reduce the sticking of the material, reduce the frequency of manual cleaning, and save time and labor.

[0010] Since an upper limit sleeve is added to the bottom of the bearing seat and a lower limit sleeve is set on the base of the machine body, the upper and lower limit sleeves are in sliding contact, and the machine body is provided with a hole with a diameter larger than the screen shaft at the position where the corresponding screen shaft extends, so the screen shaft will not be obstructed when vibrating. Description of the drawings:

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 It is a schematic diagram of the installation state of the utility model. Specific implementation method:

[0013] The following combination Figure 1 and Figure 2 Further explain the utility model;

[0014] It includes a screen shaft 1, on which are fixed several screen plates 2, and bearing seats 3 are fitted at both ends of the screen shaft; its characteristics are: an upper limit sleeve 4 extending downward is added to the bottom of the bearing seat, a threaded hole 5 is opened in the middle of the lower surface of the bottom of the bearing seat, and a lower limit sleeve 6 is also included, the lower limit sleeve is located on the inner side of the upper limit sleeve and the inner wall of the upper limit sleeve is in sliding contact with the outer wall of the lower limit sleeve; a base plate 7 is fixed to the bottom of the lower limit sleeve, and the base plate is connected to the body base 8 by bolts, and corresponding holes are provided on the body base and the base plate, and the bolts 9 are extended into the upper and lower limit sleeves through the holes of the body base and the base plate, and the upper ends of the bolts are threadedly connected to the threaded holes opened on the lower surface of the bearing seat, a spring 10 is sleeved on the bolts between the base plate and the bearing seat, and a nut 14 is screwed on the bolts located on the outside of the body base.

[0015] A hole 11 with a diameter larger than the diameter of the screen shaft is provided at the part of the machine body corresponding to the extending part of the screen shaft. The outer end of the annular rubber sealing cover 12 is connected to the machine body outside the hole 11 by bolts. The inner end of the rubber sealing cover is sleeved on the screen shaft. A circle of felt sealing ring 13 is provided on the surface where the inner end of the rubber sealing cover contacts the screen shaft.

[0016] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A roller screen shaft assembly, comprising a screen shaft (1), a plurality of screen plates (2) fixed on the screen shaft, and bearing seats (3) mounted on both ends of the screen shaft; the characteristics of the assembly are: An upper limit sleeve (4) extending downward is added to the bottom of the bearing seat, a threaded hole (5) is opened in the middle of the lower surface of the bottom of the bearing seat, and a lower limit sleeve (6) is also included. The lower limit sleeve is located on the inner side of the upper limit sleeve and the inner wall of the upper limit sleeve is in sliding contact with the outer wall of the lower limit sleeve; a base plate (7) is fixed to the bottom of the lower limit sleeve, and the base plate is connected to the body base (8) by bolts. The body base and the base plate are provided with corresponding holes. The bolts (9) extend into the upper and lower limit sleeves through the holes of the body base and the base plate, and then the upper ends of the bolts are threadedly connected to the threaded holes opened on the lower surface of the bearing seat. A spring (10) is sleeved on the bolts located between the base plate and the bearing seat, and a nut (14) is screwed on the bolts located on the outer side of the body base.

2. The roller screen shaft assembly according to claim 1, characterized in that: A hole (11) having a diameter larger than that of the sieve shaft is provided at a portion of the machine body corresponding to the extended portion of the sieve shaft. The outer end of an annular rubber sealing gland (12) is connected to the machine body outside the hole (11) by bolts. The inner end of the rubber sealing gland is sleeved on the sieve shaft. A felt sealing ring (13) is provided on the surface of the inner end of the rubber sealing gland in contact with the sieve shaft.

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