CN217411367U - Multi-stage screening system mechanism of coal conveying fuel system - Google Patents

Abstract

The utility model discloses a coal conveying fuel system's multistage screening is mechanism, including the screening case, the fixed plate that is equipped with of screening incasement portion, the fixed plate top be equipped with rather than the butt scraper blade, the upper end of scraper blade is equipped with the actuating mechanism who is used for driving its reciprocating motion about being located the fixed plate up end, first feed opening, second feed opening and third feed opening have from left to right been seted up in proper order on the fixed plate, be equipped with first sieve and second sieve in first feed opening and the second feed opening respectively, be equipped with first sieve mesh of multiunit and second sieve mesh on first sieve and the second sieve respectively, the radius of second sieve mesh is the twice of first sieve mesh radius, the utility model discloses the sieve mesh on the second sieve that sets up is the twice of the sieve mesh on the first sieve, and fixed plate top sliding connection has the scraper blade, promotes fuel through first sieve mesh respectively through the scraper blade slides on the fixed plate, And the second sieve plate and the third feed opening are used for sieving.

Description

Multi-stage screening system mechanism of coal conveying fuel system

Technical Field

The utility model relates to a coal conveying fuel system's multistage screen is mechanism.

Background

When a CFB boiler is adopted in a thermal power plant, a coal mill is not arranged in front of the boiler, and the granularity of fuel entering the boiler is controlled by a screening system arranged in a coal conveying system, so that the control of the discharge granularity of a fine crusher has important significance on the combustion efficiency of the boiler;

the multi-stage screening mechanism of the existing coal conveying fuel system needs a plurality of groups of driving sources to respectively drive a plurality of groups of screening mechanisms to screen in the using process, and has a complex structure and high cost.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's is not enough, the utility model provides a coal conveying fuel system's multistage screening is mechanism, can be through setting gradually first sieve on the fixed plate, second sieve and third feed opening, and the sieve mesh on the second sieve is the twice of the sieve mesh on the first sieve, and fixed plate top sliding connection has the scraper blade, slide on the fixed plate through actuating mechanism drive scraper blade and promote fuel respectively through first sieve, second sieve and third feed opening, sieve and classify it, simple structure low cost.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a coal conveying fuel system's multistage screening is mechanism, includes the screening case, the inside fixed plate that is equipped with of screening case, the fixed plate top is equipped with rather than the butt scraper blade, the upper end of scraper blade is equipped with and is used for driving its actuating mechanism who is located fixed plate up end reciprocating motion about, first feed opening, second feed opening and third feed opening have from left to right been seted up in proper order on the fixed plate, be equipped with first sieve and second sieve in first feed opening and the second feed opening respectively, be equipped with the first sieve mesh of multiunit and second sieve mesh on first sieve and the second sieve respectively, the radius of second sieve mesh is the radial twice of first sieve mesh.

As a preferred technical scheme of the utility model, actuating mechanism is including being located the outside motor that sets up of screening case, the outside of motor is equipped with the fixing base of fixing on screening incasement wall, the output of motor is connected with the lead screw that stretches into screening incasement portion, the bearing is connected between the other end of lead screw and the inner wall of screening case, the outside thread bush of lead screw is equipped with the thread bush piece, the top of thread bush piece is equipped with guiding mechanism, the motor is positive reverse motor.

As a preferred technical scheme of the utility model, the guide bar that guiding mechanism set up including the upper end that is located the lead screw, fixed connection between the both ends of guide bar all and the inner wall of screening case, the outside cover of guide bar is equipped with the guide ring, fixed connection between guide ring and the screw cover piece.

As a preferred technical scheme of the utility model, the upper end of screening case is equipped with feed hopper, feed hopper and the inside intercommunication of screening incasement portion, feed hopper is located one side top setting of keeping away from the second feed opening of first feed opening, one side of screening case is equipped with the chamber door.

As a preferred technical scheme of the utility model, the mounting groove has been seted up under the homogeneous phase in first feed opening and the second feed opening to both sides, first sieve and second sieve are located two sets ofly respectively in the mounting groove, two sets of the inside stop gear that all is equipped with of mounting groove, stop gear is including fixing the reference column in first sieve bottom, the constant head tank has been seted up to the bottom in the mounting groove, the reference column inserts in the constant head tank, the inside both sides of constant head tank all are fixed with the stopper, the spacing groove has all been seted up to both sides on the reference column, looks adaptation between stopper and the spacing groove.

As a preferred technical scheme of the utility model, the fixed slot has inwards been seted up to screening incasement bottom, the fixed slot is equipped with three groups, three groups all be equipped with the receiver in the fixed slot, three groups the receiver is located first feed opening, second feed opening and third feed opening below respectively.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses can be through setting gradually first sieve, second sieve and third feed opening on the fixed plate, and the sieve mesh on the second sieve is the twice of the sieve mesh on the first sieve, and fixed plate top sliding connection has the scraper blade, slides on the fixed plate through actuating mechanism drive scraper blade and promotes fuel and pass through first sieve, second sieve and third feed opening respectively, sieves and categorised, simple structure low cost to it.

Drawings

Fig. 1 is a schematic diagram of the external structure of the present invention.

Fig. 2 is a schematic view of the whole internal structure of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2 according to the present invention.

Fig. 4 is a schematic structural diagram of the middle fixing plate of the present invention.

Fig. 5 is a schematic view of the sectional structure of the joint between the middle thread bushing block and the guide ring of the present invention.

Wherein, the names corresponding to the reference numbers are:

1. screening the box; 2. a box door; 3. a fixed seat; 4. a feed hopper; 5. a motor; 6. a screw rod; 7. a guide bar; 8. a threaded bushing block; 9. a squeegee; 10. a guide ring; 11. a storage box; 12. fixing grooves; 13. a fixing plate; 14. a first feed opening; 15. a second feed opening; 16. a third feed opening; 17. a first screen deck; 18. a second screen deck; 19. mounting grooves; 20. a positioning column; 21. positioning a groove; 22. a limiting block; 23. a limiting groove.

Detailed Description

The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.

As shown in fig. 1, fig. 2, fig. 4, and fig. 5, the present invention provides a multi-stage screening system mechanism of a coal transportation fuel system, which comprises a screening box 1, a fixed plate 13 is fixedly disposed inside the screening box 1, a scraper 9 abutted against the fixed plate 13 is disposed above the fixed plate 13, a driving mechanism for driving the scraper 9 to reciprocate left and right on the upper end surface of the fixed plate 13 is disposed on the upper end of the scraper, a first feed opening 14, a second feed opening 15, and a third feed opening 16 are sequentially disposed on the fixed plate 13 from left to right, a first screen plate 17 and a second screen plate 18 are respectively disposed in the first feed opening 14 and the second feed opening 15, a plurality of groups of first screen holes and second screen holes are respectively disposed on the first screen plate 17 and the second screen plate 18, the radius of the second screen holes is twice the radius of the first screen holes, the driving mechanism comprises a motor 5 disposed outside the screening box 1, the screening box comprises a motor 5, a fixed seat 3 fixed on the outer wall of a screening box 1 is arranged outside the motor 5, the output end of the motor 5 is connected with a screw rod 6 extending into the screening box 1, the other end of the screw rod 6 is connected with the inner wall of the screening box 1 through a bearing, a threaded sleeve block 8 is sleeved outside the screw rod 6 through threads, a guide mechanism is arranged above the threaded sleeve block 8, the motor 5 is a forward and reverse rotation motor, the guide mechanism comprises a guide rod 7 arranged at the upper end of the screw rod 6, two ends of the guide rod 7 are fixedly connected with the inner wall of the screening box 1, a guide ring 10 is sleeved outside the guide rod 7, and the guide ring 10 is fixedly connected with the threaded sleeve block 8;

when the device is used, fuel to be screened is placed on the fixing plate 13 and located on one side, far away from the second screen plate 18, of the first screen plate 17, the starting motor 5 drives the screw rod 6 to rotate, the guide ring 10 fixedly connected with the threaded sleeve block 8 is sleeved on the guide rod 7 to guide the threaded sleeve block 8, therefore, the threaded sleeve block 8 can move leftwards or rightwards along with the rotation of the screw rod 6, the threaded sleeve block 8 is driven to move rightwards by controlling the rotating direction of the forward and reverse motor 5 and drives the scraper plate 9 fixed at the bottom of the threaded sleeve block to move synchronously, the fuel is pushed together to be screened and classified through the first screen plate 17, the second screen plate 18 and the third discharging opening 16 respectively, meanwhile, the structure is simple, and the fuel can be screened in multiple stages through a group of driving mechanisms.

As shown in fig. 1, 2 and 3, in this embodiment, in order to conveniently fix and disassemble the first sieve plate 17 and the second sieve plate 18, mounting grooves 19 are respectively formed in both sides of the first discharging hole 14 and the second discharging hole 15, the first sieve plate 17 and the second sieve plate 18 are respectively located in two sets of the mounting grooves 19, a limiting mechanism is respectively arranged in each set of the mounting grooves 19, the limiting mechanism includes a positioning column 20 fixed at the bottom of the first sieve plate 17, a positioning groove 21 is formed in the bottom of the mounting groove 19, the positioning column 20 is inserted into the positioning groove 21, limiting blocks 22 are respectively fixed on both sides of the inside of the positioning groove 21, limiting grooves 23 are respectively formed in both sides of the positioning column 20, the limiting blocks 22 are adapted to the limiting grooves 23, the limiting blocks 22 are made of nitrile rubber, and a feeding funnel 4 is arranged at the upper end of the sieving box 1, the feeding hopper 4 is communicated with the inside of the screening box 1, the feeding hopper 4 is arranged above one side, away from the second feed opening 15, of the first feed opening 14, and the box door 2 is arranged on one side of the screening box 1;

when using this device, can arrange first sieve 17 and second sieve 18 in first feed opening 14 and the mounting groove 19 in second feed opening 15 respectively in, insert the constant head tank 21 in mounting groove 19 with the reference column 20 of first sieve 17 bottom, in stopper 22 up to in the constant head tank 21 inserts the spacing groove 23 on the reference column 20, can fix a position reference column 20, make it fix in constant head tank 21, conveniently fix first sieve 17 and second sieve 18.

As shown in fig. 2, in order to conveniently classify and store the screened fuel, fixing grooves 12 are formed inwards in the bottom of the screening box 1, three groups of fixing grooves 12 are formed in the fixing grooves 12, a storage box 11 is arranged in each of the three groups of fixing grooves 12, and the storage boxes 11 in the three groups are respectively located below a first feed opening 14, a second feed opening 15 and a third feed opening 16.

The above embodiment is only one of the preferred embodiments of the present invention, and all the insubstantial changes or color modifications made in the spirit and the idea of the main design of the present invention are consistent with the present invention and should be included in the scope of the present invention.

Claims (6)

1. A multi-stage screening system mechanism of a coal conveying fuel system comprises a screening box (1) and is characterized in that, a fixed plate (13) is fixedly arranged in the screening box (1), a scraping plate (9) which is abutted against the fixed plate (13) is arranged above the fixed plate (13), the upper end of the scraper (9) is provided with a driving mechanism for driving the scraper to reciprocate left and right on the upper end surface of the fixed plate (13), a first feed opening (14), a second feed opening (15) and a third feed opening (16) are sequentially arranged on the fixed plate (13) from left to right, a first sieve plate (17) and a second sieve plate (18) are respectively arranged in the first feed opening (14) and the second feed opening (15), the first sieve plate (17) and the second sieve plate (18) are respectively provided with a plurality of groups of first sieve holes and second sieve holes, and the radius of the second sieve holes is twice that of the first sieve holes.

2. The multi-stage screening train mechanism of a coal handling fuel system of claim 1, wherein: actuating mechanism is including motor (5) that is located screening case (1) outside setting, the outside of motor (5) is equipped with fixes fixing base (3) on screening case (1) outer wall, the output of motor (5) is connected with and stretches into inside lead screw (6) of screening case (1), the bearing is connected between the other end of lead screw (6) and the inner wall of screening case (1), lead screw (6) outside screw thread cover is equipped with screw cover piece (8), the top of screw cover piece (8) is equipped with guiding mechanism, motor (5) are just reversing motor.

3. The multi-stage screening system mechanism of a coal conveying fuel system according to claim 2, wherein: guiding mechanism is including guide bar (7) that the upper end that is located lead screw (6) set up, fixed connection between the both ends of guide bar (7) all and the inner wall of screening case (1), the outside cover of guide bar (7) is equipped with guide ring (10), fixed connection between guide ring (10) and screw thread cover block (8).

4. The multi-stage screening system mechanism of a coal conveying fuel system of claim 1, wherein: the upper end of screening case (1) is equipped with feed hopper (4), feed hopper (4) and the inside intercommunication of screening case (1), one side top that keeps away from second feed opening (15) that feed hopper (4) are located first feed opening (14) sets up, one side of screening case (1) is equipped with chamber door (2).

5. The multi-stage screening train mechanism of a coal handling fuel system of claim 1, wherein: be equipped with mounting groove (19) under the both sides homogeneous phase in first feed opening (14) and second feed opening (15), first sieve (17) and second sieve (18) are located two sets of respectively in mounting groove (19), two sets of mounting groove (19) inside all is equipped with stop gear, stop gear is including fixing reference column (20) in first sieve (17) bottom, constant head tank (21) have been seted up to the bottom in mounting groove (19), reference column (20) insert in constant head tank (21), constant head tank (21) inside both sides all are fixed with stopper (22), spacing groove (23) have all been seted up to both sides on reference column (20), looks adaptation between stopper (22) and spacing groove (23).

6. The multi-stage screening train mechanism of a coal handling fuel system of claim 1, wherein: fixed slot (12) have inwards been seted up to bottom in screening case (1), fixed slot (12) are equipped with three groups, three groups all are equipped with receiver (11) in fixed slot (12), three groups receiver (11) are located first feed opening (14), second feed opening (15) and third feed opening (16) below respectively.

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