Adjustable screening middle trough

Abstract

The invention discloses an adjustable screening middle trough, and belongs to the technical field of coal transportation, the adjustable screening middle trough comprises a middle plate detachably arranged between two groups of trough ledges and used for supporting coal, and the inner wall of each trough ledge is provided with a slot matched with the middle plate; the driving shaft is connected with the middle plate and is used for adjusting the position of the middle plate in the vertical direction relative to the ledge; in the process that the driving shaft drives the material distributing pipe to rotate through the first transmission unit, coal cinder located in the material distributing pipe can be thrown out through the material distributing holes to be located among the slot wall of the inserting slot, the middle plate and the sealing plate, and the middle plate can be stably supported along with gradual increase of the coal cinder; compared with an existing device for supporting the lifted middle plate through an additional cushion block and other structures, the coal seam formed between the bottom wall of the inserting groove and the middle plate can be used for supporting the middle plate in all directions in the length direction of the middle plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal transportation, in particular to an adjustable screening middle trough. BACKGROUND

[0002] The middle trough is a core component of a scraper conveyor, a transfer machine and other conveying equipment, and is closely related to the operation of the entire conveying system. The middle trough mainly realizes the carrying and conveying of materials by cooperating with the movement of the scraper chain.

[0003] In the traditional device, the middle plate is welded with the trough side, so that the middle trough can only be disassembled as a whole during replacement. In some current middle trough structures, the middle plate is detachably connected with the trough side. On the one hand, the position of the middle plate can be adjusted, and on the other hand, the middle plate can be replaced. However, in actual use, when the middle plate is adjusted upward relative to the trough side, the bottom of the middle plate is not fully supported, so that the structure of the middle plate lacks stability, which is not conducive to the long-term use of the middle plate.

[0004] Therefore, it is necessary to provide an adjustable screening middle trough to solve the above technical problems. SUMMARY

[0005] The purpose of the present application is to provide an adjustable screening middle trough to solve the problem that the bottom of the middle plate is not fully supported after the middle plate is adjusted upward relative to the trough side in the structure of the existing middle trough.

[0006] Based on the above idea, the present application provides the following technical scheme: an adjustable screening middle trough, comprising: A middle plate is detachably arranged between two groups of trough sides for supporting coal. The inner wall of the trough side is provided with a slot matched with the middle plate. A drive shaft is connected with the middle plate for adjusting the position of the middle plate relative to the trough side in the vertical direction. A distribution pipe passes through the middle plate and movably cooperates with the middle plate. When the drive shaft moves the middle plate upward to leave a space between the middle plate and the bottom wall of the slot, the coal ash entering the distribution pipe can be dispersed between the bottom wall of the slot and the middle plate to support the middle plate during the synchronous rotation of the drive shaft and the adjacent distribution pipe.

[0007] As a further scheme of the present application: the distribution pipe is provided with multiple groups, and adjacent two groups of distribution pipes are drivingly connected through a second transmission unit. The drive shaft and its adjacent distribution pipe are drivingly connected through a first transmission unit.

[0008] As a further scheme of the present application: the groove wall is provided with a sealing disc matched with the distribution pipe, the sealing disc is attached to the top end face of the distribution pipe, a plurality of through holes are uniformly arranged on the surface of the sealing disc, a plurality of feeding holes are uniformly arranged on the top end face of the distribution pipe, when the through holes are aligned with the feeding holes, the cinder can enter the distribution pipe, and a plurality of distribution holes for discharging the cinder are uniformly arranged on the outer circumferential surface of the distribution pipe.

[0009] As a further scheme of the present application: the bottom of the middle plate is fixedly provided with a sealing plate, the sealing plate is attached to the inner wall of the groove wall to block the cinder between the bottom wall of the insertion groove and the middle plate.

[0010] As a further scheme of the present application: the one end of the driving shaft penetrating the groove wall is connected with a pressing disc, the bottom of the pressing disc is provided with a chamfer, a rack is fixedly installed on the scraper, the top of the rack is fixedly connected with a top pressing piece matched with the pressing disc, and the outer side of the driving shaft is fixedly sleeved with a gear engaged with the rack.

[0011] As a further scheme of the present application: the top wall of the insertion groove is fixedly provided with a baffle, and a strip-shaped groove aligned with the baffle is arranged on the top surface of the middle plate.

[0012] As a further scheme of the present application: the two driving shafts on the groove wall are distributed staggered along the length direction of the groove wall, so that the top pressing pieces on the two scrapers can be in contact with the pressing disc at the same time.

[0013] As a further scheme of the present application: the top pressing piece is in a columnar structure, and a ball is installed at the top end of the top pressing piece.

[0014] As a further scheme of the present application: the side edge of the middle plate is fixedly provided with a protrusion, and the driving shaft is fixedly connected with the protrusion.

[0015] As a further scheme of the present application: the protrusion penetrates the pre-set notch on the groove wall and can move in the vertical direction relative to the groove wall.

[0016] Compared with the prior art, the beneficial effects of the present application are: in the process of rotating the distribution pipe by the first transmission unit driven by the driving shaft, the cinder in the distribution pipe can be thrown out through the distribution hole and be located between the insertion groove wall, the middle plate and the sealing plate, and as the cinder gradually increases, the middle plate can be stably supported, compared with the prior art which supports the rising middle plate by additional cushion blocks and the like, the coal layer formed between the insertion groove bottom wall and the middle plate can be used to support the middle plate in all directions along the length direction of the middle plate, so that the stability of the middle plate can be maximized. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and embodiments: Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the engagement between the protrusion and the groove of the present invention; Figure 3 This is a schematic diagram of the groove and scraper structure of the present invention; Figure 4 This is a diagram showing the distribution of the sealing discs in this invention; Figure 5 This is a schematic diagram of the material distribution pipe and the middle plate of the present invention; Figure 6 This is a distribution diagram of the second transmission unit of the present invention; Figure 7 This is the present invention. Figure 2 A magnified structural diagram at point A; Figure 8 This is the present invention. Figure 3 A magnified structural diagram at point B; Figure 9 This is the present invention. Figure 4 A magnified structural diagram at point C.

[0018] In the diagram: 1. Groove side; 2. Scraper; 3. Middle plate; 301. Protrusion; 302. Sealing plate; 4. Base plate; 5. Drive shaft; 6. Pressure plate; 601. Chamfer; 7. Gear; 8. Rack; 801. Top pressing component; 9. Sealing plate; 901. Through hole; 10. First transmission unit; 11. Adjusting rod; 12. Distributor pipe; 1201. Distributor hole; 1202. Feed hole; 13. Baffle; 14. Protrusion; 15. Second transmission unit; 16. Positioning block; 17. Slot. Detailed Implementation

[0019] like Figures 1-9 As shown, an adjustable screening trough includes two sets of trough sides 1, with a middle plate 3 and a bottom plate 4 disposed between the two sets of trough sides 1. In actual use, the middle plate 3 is used to support the coal. Specifically, a chain drives a scraper 2 to move on top of the middle plate 3 to transport the coal. In traditional central trough structures, both the bottom plate 4 and the middle plate 3 are welded to the trough side 1. During use, when the middle plate 3 is severely worn, the entire central trough often needs to be replaced, which makes the operation difficult. However, in the existing device, the middle plate 3 is detachably connected to the trough side 1. Therefore, when the middle plate 3 is worn, only the middle plate 3 needs to be replaced.

[0020] In addition, due to the detachable connection between the middle plate 3 and the chute side 1, the position of the middle plate 3 relative to the chute side 1 can be adjusted, and when the upper surface of the middle plate 3 is worn, the position of the damaged middle plate 3 in the vertical direction can be adjusted, so that the adjacent two middle plates 3 are aligned as much as possible, thereby reducing the resistance received by the scraper 2 during movement.

[0021] In practical application, the middle plate 3 can be provided with a sieve hole, when the coal is moved under the push of the scraper 2, the material smaller than the size of the sieve hole will fall through the sieve hole under the action of gravity, and the material larger than the size of the sieve hole will continue to be conveyed forward with the scraper 2, in addition, when the coal is relatively wet, the moisture can also be filtered through the sieve hole.

[0022] In a conventional arrangement, the middle plate 3 and the chute side 1 can be connected by bolts, so that the position of the middle plate 3 relative to the chute side 1 can be adjusted, but in actual use, when the middle plate 3 moves upward relative to the chute side 1 by a distance, only the bolts support and limit the middle plate 3, so that the structure of the entire middle plate 3 lacks stability, based on this, the scheme is provided with a slot 17 matched with the middle plate 3 on the opposite side of the two groups of chute sides 1, so that the two side edges of the middle plate 3 are inserted into the slot 17; Further, as shown in Figures 1-3 , Figures 6-7 , the side edge of the middle plate 3 is welded with a lug 301, the lug 301 passes through the pre-set slot of the chute side 1 and the lug 301 can move in the vertical direction relative to the chute side 1, so as to adjust the position of the middle plate 3 relative to the chute side 1, the lug 301 is fixedly installed with a driving shaft 5, the driving shaft 5 passes through the chute side 1 upward and is movably matched with the chute side 1, so that the driving shaft 5 can slide and rotate relative to the chute side 1; In order to stably support the raised middle plate 3, a plurality of distribution pipes 12 are arranged along the length direction of the chute side 1, the adjacent two groups of distribution pipes 12 are drivingly connected through a second transmission unit 15, so that the plurality of distribution pipes 12 can rotate synchronously, and the driving shaft 5 and one of the distribution pipes 12 are drivingly connected through a first transmission unit 10, in the process of rotating the distribution pipe 12 relative to the chute side 1, part of the coal cinder or coal powder between the chute side 1 and the middle plate 3 can enter the distribution pipe 12 and finally disperse between the bottom of the middle plate 3 and the bottom wall of the slot 17 to support the middle plate 3, thereby improving the stability of the middle plate 3.

[0023] Specifically, the chute side 1 is provided with a sealing disc 9 matched with the distribution pipe 12, the sealing disc 9 is attached to the top end face of the distribution pipe 12, as shown in Figure 9 , a plurality of through holes 901 are uniformly formed on the surface of the sealing disc 9, and a plurality of feeding holes 1202 are uniformly formed on the top end face of the distribution pipe 12; In the initial state, the through hole 901 and the feeding hole 1202 are staggered to avoid the external coal residue from entering the distribution pipe 12. During the rotation of the distribution pipe 12 driven by the driving shaft 5 through the first transmission unit 10, when the through hole 901 and the feeding hole 1202 are aligned, the coal residue can enter the distribution pipe 12. Again in combination Figure 9 As shown, a plurality of distribution holes 1201 are uniformly arranged on the outer circumferential surface of the distribution pipe 12, and a circular hole is arranged on the middle plate 3 for the distribution pipe 12 to pass through. Initially, the distribution holes 1201 are located in the circular hole.

[0024] During use, when the middle plate 3 moves upward relative to the slope 1 and the distribution pipe 12 is rotated by the driving shaft 5 through the first transmission unit 10, the coal residue between the slope 1 and the middle plate 3 can enter the distribution pipe 12. During the rotation of the distribution pipe 12, the coal residue in the distribution pipe 12 can be thrown out through the distribution holes 1201 and fall into the space between the bottom wall of the slot 17 and the middle plate 3. As the coal layer gradually increases between the bottom wall of the slot 17 and the middle plate 3, the coal layer can support the middle plate 3, thereby improving the stability of the middle plate 3.

[0025] Of course, in order to avoid the coal layer formed from falling out of the slot 17, the bottom of the middle plate 3 is fixedly installed with a sealing plate 302 which is attached to the inner wall of the slope 1 to block the coal residue between the bottom wall of the slot 17 and the middle plate 3.

[0026] Working principle, when the surface of the middle plate 3 is worn, the driving shaft 5 is driven upward by the external driving assembly, thereby driving the middle plate 3 to move upward synchronously, so that a certain space is left between the middle plate 3 and the bottom wall of the slot 17. When the driving shaft 5 drives the distribution pipe 12 to rotate through the first transmission unit 10 so that the feeding hole 1202 is aligned with the through hole 901 on the sealing plate 9, the coal residue can enter the distribution pipe 12. Since the middle plate 3 moves upward relative to the distribution pipe 12 by a distance, part of the distribution holes 1201 on the distribution pipe 12 can move out of the circular hole, so that during the rotation of the distribution pipe 12 driven by the driving shaft 5 through the first transmission unit 10, the coal residue in the distribution pipe 12 can be thrown out through the distribution holes 1201 and be located between the slot wall of the slot 17, the middle plate 3 and the sealing plate 302. As the coal residue gradually increases, it can stably support the middle plate 3. In summary, compared to the existing device which supports the rising middle plate 3 by additional cushion blocks and the like, the coal layer formed between the bottom wall of the slot 17 and the middle plate 3 can support the middle plate 3 in all directions along the length direction of the middle plate 3, thereby maximizing the stability of the middle plate 3, and the adjacent two middle plates 3 can be aligned, and the scraper 2 can move more stably on the surface of the middle plate 3.

[0027] As the first embodiment of the driving assembly, a motor and a hydraulic rod and the like structure can be arranged outside the groove side 1, the motor drives the rotation of the driving shaft 5, and the hydraulic cylinder drives the upward movement of the motor and the driving shaft 5.

[0028] Although the above-mentioned embodiment is simple and reliable in structure, it is relatively cumbersome and high in cost when actually arranged, based on this, the second embodiment of the driving assembly is given: The driving shaft 5 is connected with the pressure plate 6 at one end passing through the groove side 1, the pressure plate 6 can be slidingly matched with the driving shaft 5, so as to adjust the position of the pressure plate 6 on the driving shaft 5, of course, the outer circumferential surface of the pressure plate 6 is threadedly connected with a screw or a bolt, when the position of the pressure plate 6 relative to the driving shaft 5 is determined, the screw or the bolt can lock the pressure plate 6 and the driving shaft 5; The bottom of the pressure plate 6 is provided with a chamfer 601, and the top of the scraper 2 is fixedly provided with a rack 8 on both sides through a support, the top of the rack 8 is fixedly connected with a top pressing piece 801, when the chain drives the scraper 2 to move to one side of the pressure plate 6, the top pressing piece 801 and the chamfer 601 at the bottom of the pressure plate 6 can drive the pressure plate 6 to move upward, so as to drive the driving shaft 5 and the middle plate 3 to move upward; The outer side of the driving shaft 5 is fixedly sleeved with a gear 7 engaged with the rack 8, the width of the rack 8 is greater than the height of the gear 7, referring to Figure 4 The two driving shafts 5 on the groove side 1 are distributed in the length direction of the groove side 1, so that the top pressing pieces 801 on the two scrapers 2 can contact the pressure plate 6 at the same time, so as to stably drive the pressure plate 6 to move upward.

[0029] Working principle: when the chain drives the scraper 2 to move along the length direction of the middle plate 3, the rack 8 can move on the top of the groove side 1, when the two groups of scrapers 2 move to one side of the pressure plate 6 at the same time, the extrusion of the top pressing piece 801 on the rack 8 and the chamfer 601 on the pressure plate 6 can drive the pressure plate 6 to move upward, so as to drive the driving shaft 5 and the middle plate 3 to move upward, at the same time, the engagement of the rack 8 and the gear 7 can drive the driving shaft 5 to rotate, and then drive the distribution pipe 12 to rotate through the first transmission unit 10, when the rack 8 passes through the gear 7, the through hole 901 and the feeding hole 1202 are re-displaced, according to the above content, the cinder can be dispersed between the bottom wall of the insertion slot 17 and the middle plate 3 for supporting the middle plate 3, in addition, when the top pressing piece 801 is displaced from the pressure plate 6, the middle plate 3 can fall, in this process, the middle plate 3 can press the cinder at the bottom wall of the insertion slot 17 to make the cinder more compact, in the process of moving the scraper 2 by the chain, the middle plate 3 can reciprocate in the vertical direction, by repeatedly extruding the cinder, the coal layer formed between the bottom wall of the insertion slot 17 and the middle plate 3 can stably support the middle plate 3.

[0030] AsFigures 1-9 As shown, the inner wall of the groove 1 is inwardly recessed to form a recess, and the two ends of the scraper 2 are outwardly extended to form a guide part matched with the recess. When the chain pulls the scraper 2 to move along the length direction of the middle plate 3, the guide part is inserted into the recess, so that the scraper 2 can stably move along the groove 1. Since it is a commonly used technical means in the middle trough structure, the specific structure of the scraper 2 and the groove 1 will not be described here.

[0031] In combination Figure 5 As shown, the bottom of the recess is a horizontal plane structure, and the above-mentioned sealing plate 302 is arranged at the horizontal plane of the recess. Specifically, a through hole for installing the distribution pipe 12 is formed on the groove 1, so that the distribution pipe 12 is rotatably installed in the through hole and can only rotate relative to the groove 1. The sealing plate 302 is fixed at the top position of the through hole, and the top surface of the sealing plate 302 is flush with the bottom surface of the recess.

[0032] The baffle 13 is fixedly arranged at the top wall of the insertion slot 17 and at the outer side, and a strip-shaped slot aligned with the baffle 13 is formed on the top surface of the middle plate 3. Initially, the bottom edge of the baffle 13 is inserted into the strip-shaped slot, so as to avoid the external coal cinder entering between the top wall of the insertion slot 17 and the middle plate 3.

[0033] The first transmission unit 10 and the second transmission unit 15 can be chains or belts. The groove 1 is provided with a mounting channel for accommodating the second transmission unit 15, and the first transmission unit 10 passes through the pre-designed through slot of the groove 1.

[0034] In combination Figures 1-3 , Figure 7 As shown, in order to further improve the stability of the middle plate 3, the protruding block 301 is integrally arranged in a T-shaped structure, so that the two sides of the protruding block 301 are the protruding parts 14, and the outer wall of the groove 1 is fixedly provided with a connecting plate. The adjusting rod 11 is rotatably connected at the connecting plate, the adjusting rod 11 passes through the protruding part 14 and is in sliding cooperation with the protruding part 14, and the adjusting rod 11 is threadedly connected with the positioning block 16 at the outer side. The positioning block 16 is arranged in abutment with the outer wall of the groove 1. In actual use, the thickness of the top wear of the middle plate 3 can be measured by the worker. Assuming that the thickness of the wear is 5mm, at this time, the position of the pressure plate 6 can be adjusted downward by 5mm, and the positioning block 16 is moved upward by 5mm by rotating the adjusting rod 11. In this case, the maximum distance of the upward movement of the pressure plate 6 driven by the top pressing part 801 is 5mm. In the later period, the coal layer between the bottom wall of the insertion slot 17 and the middle plate 3 can support the middle plate 3, so that the middle plate 3 is limited between the coal layer and the positioning block 16.

[0035] In combination Figure 8As shown, the top pressing piece 801 can be a columnar structure, and a top end of the top pressing piece 801 can be provided with a ball to reduce the friction between the top pressing piece 801 and the pressing plate 6.

[0036] The above disclosure is only the preferred embodiment of the present application, which is convenient for those skilled in the art to understand and implement, but it cannot limit the scope of the present application, so the equivalent changes made according to the scope described in the present application still belong to the scope covered by the present application.

Claims

1. An adjustable sieve center trough characterized in that, Include: Middle plate (3) is detachably arranged between two groups of groove (1), used for supporting coal, the inner wall of the groove (1) is provided with the slot (17) matched with the middle plate (3); Driving shaft (5) is connected with the middle plate (3), used for adjusting the position of the middle plate (3) relative to the groove (1) in the vertical direction; The distribution pipe (12) passes through the middle plate (3) and is movably connected with the middle plate (3), when the driving shaft (5) drives the middle plate (3) to move upward and leaves a space between the middle plate (3) and the bottom wall of the slot (17), in the process of synchronous rotation of the driving shaft (5) and the distribution pipe (12), the coal ash entering the distribution pipe (12) can be dispersed between the bottom wall of the slot (17) and the middle plate (3) to support the middle plate (3).

2. An adjustable sieve bend according to claim 1, characterized in that: The distribution pipe (12) is provided with multiple groups, and the adjacent two groups of distribution pipes (12) are connected by the second transmission unit (15), and the driving shaft (5) and the adjacent distribution pipe (12) are connected by the first transmission unit (10).

3. An adjustable sieve bend according to claim 2, wherein: The groove (1) is provided with the sealing disc (9) matched with the distribution pipe (12), the sealing disc (9) is attached to the top end surface of the distribution pipe (12), a plurality of through holes (901) are uniformly arranged on the surface of the sealing disc (9), a plurality of feeding holes (1202) are uniformly arranged on the top end surface of the distribution pipe (12), when the through hole (901) is aligned with the feeding hole (1202), the coal ash can enter the distribution pipe (12), and a plurality of distribution holes (1201) for discharging coal ash are uniformly arranged on the outer circumferential surface of the distribution pipe (12).

4. An adjustable sieve bend according to claim 3, wherein: The bottom of the middle plate (3) is fixedly installed with the sealing plate (302), and the sealing plate (302) is attached to the inner wall of the groove (1) to block the coal ash between the bottom wall of the slot (17) and the middle plate (3).

5. The adjustable sieve bend of claim 1, wherein: The end of the driving shaft (5) passing through the groove (1) is connected with the pressing disc (6), the bottom of the pressing disc (6) is provided with a chamfer (601), the rack (8) is fixedly installed on the scraper (2), the top of the rack (8) is fixedly connected with the top pressing piece (801) matched with the pressing disc (6), and the outer side of the driving shaft (5) is fixedly sleeved with the gear (7) engaged with the rack (8).

6. An adjustable sieve bend according to claim 1, wherein: The top wall of the slot (17) is fixedly provided with the baffle (13), and the top surface of the middle plate (3) is provided with the strip-shaped slot aligned with the baffle (13).

7. An adjustable sieve bend according to claim 5, wherein: The two driving shafts (5) on the groove (1) are distributed staggered along the length direction of the groove (1), so that the top pressing pieces (801) on the two scrapers (2) can be in contact with the pressing disc (6) at the same time.

8. An adjustable screen center slot according to claim 5, wherein: The top pressing piece (801) is a columnar structure, and the top end of the top pressing piece (801) is provided with a ball.

9. An adjustable sieve bend according to claim 1, wherein: The side edge of the middle plate (3) is fixedly provided with the protrusion (301), and the driving shaft (5) is fixedly connected with the protrusion (301).

10. An adjustable sieve bend according to claim 9, wherein: The protrusion (301) passes through the preformed notch of the groove (1) and can move in the vertical direction relative to the groove (1).

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