Excavating chain of railway screen scarifier

Abstract

The utility model relates to the technical field of railway line maintenance, in particular to an excavating chain of a railway screen scarifier. The scraper plates are arranged, the containing grooves are formed in the lower sides of the digging plates, and when the digging chain operates, broken ballasts and dirty soil deposited at the bottoms of the guide grooves are shoveled together through the scrapers on the lower sides of the digging plates, so that railway ballasts are conveyed between the adjacent digging plates along with the digging chain, and the broken ballasts and the dirty soil are gathered in the containing grooves and are not prone to continuously depositing downwards along with vibration; the soil is conveyed into the screening device under the driving of the digging chain, so that dirty soil and crushed ballast are prevented from settling to the bottom of the lifting guide groove to extrude the digging chain and influence the operation of the digging chain; according to the utility model, by arranging the ballast discharging channel, broken ballast and dirty soil in the ascending guide groove are guided into the accommodating groove through the ballast discharging channel, so that the condition that the operation of the raking chain is influenced due to the fact that the raking chain is extruded outwards by the dirty soil and the broken ballast deposited in the ascending guide groove is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of railway line maintenance, and in particular to an excavating chain of a railway screening machine. Background Art

[0002] For gravel railway track bed, after long-term train running impact, gravel damage and soil pollution, the track bed will gradually lose its elasticity, affecting driving safety and riding comfort. When the ballast impurity of the track bed exceeds 30%, maintenance operations such as cleaning and screening should be carried out to ensure the quality of the line and restore the geometric parameters, elasticity and drainage of the track bed. The railway full-section cleaning machine is a railway maintenance machine that can pass through the sleepers, dig out the ballast under the sleepers and transport it to the screening device for screening, and then backfill it into the track bed. It has the characteristics of high operating efficiency and high cleaning quality. The excavation chain is a key component of the excavation device of the railway cleaning machine. Its function is to loosen the ballast of the track bed, dig it out and transport it to the screening device of the cleaning machine.

[0003] The patent number is CN207210858U and the patent announcement date is April 10, 2018. It discloses a digging and scraping chain of a screening machine, including a connecting chain and a ballast scraping plate installed on the outside of the connecting chain. During the operation of the above patent, the ballast scraping plate will dig up the ballast for transportation, and the dirt and broken ballast will settle to the bottom of the rising guide groove of the digging and scraping chain. Under working conditions such as mud overflowing and a large amount of dirt, a dense soil layer will be formed at the bottom of the guide groove, and the thickness will continue to increase, causing the digging and scraping chain to run poorly or even get stuck. Utility Model Content

[0004] The utility model aims to solve the above problems, thereby providing an excavating and scraping chain which can clean up dirt and ballast gathered at the bottom of an ascending guide trough.

[0005] The utility model solves the above problems and adopts the following technical solutions:

[0006] A digging and scraping chain of a railway screening machine comprises a plurality of scraping plates, each scraping plate is connected by a chain link to form a digging and scraping chain as a whole, the digging and scraping chain circulates between an ascending guide groove and a descending guide groove, the scraping plate comprises a U-shaped chain plate, a ballast plate and a scraping tooth seat, the front end and the rear end of the U-shaped chain plate are respectively pin-connected with the front and rear chain links, the ballast plate is fixed on the U-shaped chain plate, the scraping tooth seat is fixed on the upper end of the ballast plate, and a plurality of inclined scraping teeth are arranged on the scraping tooth seat;

[0007] Among them, a scraper plate is fixed at the bottom end of each ballast plate, and the scraper plate, the ballast plate and the top surface of the U-shaped chain plate form a receiving groove for holding broken ballast and dirt; a ballast discharge channel is formed between two adjacent U-shaped chain plates. When the excavation chain runs into the rising guide groove, the broken ballast and dirt in the gap between the scraper plate and the rising guide groove enter the receiving groove through the ballast discharge channel.

[0008] Compared with the prior art, the utility model adopting the above technical solution has the following beneficial effects:

[0009] The utility model provides a scraper plate to form a receiving groove on the lower side of the scraper plate. When the excavation and scraping chain is running, the scraper under the scraper plate will scoop up the broken ballast and dirt deposited on the bottom of the guide groove together, so that the ballast is transported with the scraper chain between adjacent scrapers. The broken ballast and dirt are gathered in the receiving groove and are not easy to continue to settle downward with the vibration, and are transported to the screening device under the drive of the scraper chain, so as to avoid the dirt and broken ballast from settling to the bottom of the rising guide groove, squeezing the excavation and scraping chain, and affecting the operation of the excavation and scraping chain; the utility model provides a ballast discharge channel to guide the broken ballast and dirt inside the rising guide groove into the receiving groove through the ballast discharge channel, so as to avoid the scraping chain being squeezed outward by the dirt and broken ballast deposited inside the rising guide groove, and affecting the operation of the scraping chain.

[0010] As a preferred embodiment, a further technical solution of the utility model is:

[0011] The number of teeth of two adjacent groups of scoop plates is different, and the teeth of two adjacent groups of scoop plates are staggered in the height direction. Through the above structure, the ballast is impacted and pried from different positions, which is more conducive to the loosening and falling of the ballast, and at the same time, the excavation resistance of a single scoop plate is smaller.

[0012] A fixed block is fixed to the lower side of the chain link, and the right side of the fixed block is connected to the U-shaped chain plate pinned to the front end of the chain link to form a ballast discharge channel. The fixed block is provided to form a ballast discharge channel, so that some broken ballast and dirt can enter the receiving groove along the ballast discharge channel.

[0013] An abutment block is fixed on the outer side of the chain link, and the front end of the abutment block abuts against the rear end of the grill plate pinned at the front end of the chain link. The abutment block is provided to provide support for the grill plate to prevent the grill plate from turning over due to force.

[0014] Both ends of the U-shaped chain plate are respectively provided with first pin holes that penetrate the upper plate and the lower plate of the U-shaped chain plate, and both ends of the chain link are provided with second pin holes that dock with the first pin holes, and pins are arranged in the first pin holes and the second pin holes that correspond in position.

[0015] The first pin hole of the upper plate of the U-shaped chain plate is provided with an annular groove, and the upper end of the pin is provided with a wire retaining ring, which is fixed in the annular groove. The above structure can prevent the pin from falling off from the first pin hole and the second pin hole.

[0016] The first pin hole of the upper plate of the U-shaped chain plate is provided with a slot, and an anti-rotation ear is fixed to the upper end of the pin, and the anti-rotation ear is engaged in the slot. Through the above structure, the position of the pin and the first pin hole is fixed, the pin is prevented from rotating in the first pin hole, and the wear of the first pin hole of the U-shaped chain plate is reduced.

[0017] A plurality of reinforcing ribs are arranged between the grill plate, the grill tooth seat and the U-shaped chain plate, so as to increase the strength of the grill tooth seat.

[0018] The pick teeth are inserted into the pick teeth seat, the rear end of the pick teeth protrudes from the pick teeth seat, and an annular retaining spring groove is provided on the protruding position, a retaining spring is installed in the retaining spring groove, one side of the retaining spring abuts against the rear end of the pick teeth seat. The retaining spring clamps the pick teeth in the pick teeth seat to prevent the pick teeth from falling off from the pick teeth seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present application;

[0020] Figure 2 is a bottom view schematic diagram of an embodiment of the present application;

[0021] Figure 3 is a schematic top view of an embodiment of the present application;

[0022] Figure 4 is a front view schematic diagram of an embodiment of the present application;

[0023] Figure 5 It is a structural schematic diagram of a grill plate according to an embodiment of the present application;

[0024] Figure 6 is an exploded view of an embodiment of the present application;

[0025] Figure 7 is another exploded view of an embodiment of the present application;

[0026] Figure 8 It is a cross-sectional schematic diagram of the excavating chain of the present application in the ascending guide groove.

[0027] In the figure: 1. chain link; 11. fixing block; 12. second pin shaft hole; 13. abutment block; 14. ballast discharge channel; 2. pick plate; 21. U-shaped chain plate; 211. first pin shaft hole; 2111. slot; 2112. annular groove; 22. pick plate; 23. pick tooth seat; 24. scraper plate; 25. reinforcing rib; 3. pick tooth; 31. retaining spring slot; 4. retaining spring; 5. pin shaft; 51. wire retaining ring; 52. anti-rotation ear; 6. rising guide groove. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0029] Reference Figure 1-8The embodiment of the present application discloses an excavating and scraping chain of a railway screening machine, including a plurality of scraping plates, each scraping plate is connected by a chain link 1 to form an excavating and scraping chain as a whole, and the excavating and scraping chain circulates between an ascending guide groove 6 and a descending guide groove, and the scraping plate includes a U-shaped chain plate 21, a ballast plate 22 and a scraping tooth seat 23, and the front end and the rear end of the U-shaped chain plate 21 are pin-connected with the front and rear chain links respectively, the ballast plate 22 is fixed on the U-shaped chain plate 21, and the scraping tooth seat 23 is fixed on the upper end of the ballast plate 22, and a plurality of inclined scraping teeth 3 are arranged on the scraping tooth seat 23;

[0030] Among them, a scraper plate 24 is fixed on the lower side of each ballast plate 22, and the scraper plate 24, the ballast plate 22 and the top surface of the U-shaped chain plate 21 form a receiving groove for containing broken ballast and dirt; a ballast discharge channel 14 is formed between two adjacent U-shaped chain plates 21, and the broken ballast and dirt in the gap between the scraper plate 2 and the rising guide groove 6 enter the receiving groove through the ballast discharge channel 14.

[0031] In this embodiment, the number of teeth 3 of two adjacent groups of scoop plates is different and is set according to actual needs, and the teeth 3 of two adjacent groups of scoop plates are staggered in the height direction. Through the above structure, the ballast is impacted and pried from different positions, which is more conducive to the loosening and falling of the ballast, and at the same time, the excavation resistance of a single scoop plate is smaller.

[0032] In this embodiment, a fixed block 11 is fixed to the lower side of the chain link 1. Preferably, the fixed block 11 is set to a triangle, the left side of the fixed block 11 is an arc surface that matches the arc of the side of the U-shaped chain plate 21, the right side of the fixed block 11 is an inclined surface, and a ballast discharge channel 14 is formed between the U-shaped chain plate 21 pinned to the front end of the chain link 1. The lower side of the fixed block 11 is flush with the lower side of the chain link, which is convenient for introducing the passing dirt and ballast into the receiving groove through the ballast discharge channel. When the fixed block 11 is set, when the lifting chain runs in the rising guide groove, the ballast and dirt deposited on the inner side wall and the lower side wall of the rising guide groove 6 are guided to the receiving groove through the fixed block 11, and transported to the screening device along with the lifting chain.

[0033] In this embodiment, an abutment block 13 is fixed to the outer side of the chain link 1, and the front end of the abutment block 13 abuts against the rear end of the ballast plate 22 of the pick plate pinned at the front end of the chain link 1. The abutment block 13 is provided to provide support for the rear end of the ballast plate 22 to prevent the pick plate from flipping under force.

[0034] In this embodiment, first pin holes 211 penetrating the upper plate and the lower plate of the U-shaped chain plate 21 are respectively provided at both ends of the U-shaped chain plate 21, and second pin holes 12 docking with the first pin holes 211 are provided at both ends of the chain link 1. Pins 5 are provided in the first pin holes 211 and the second pin holes 12 at corresponding positions, and the chain link 1 is pinned to the upper plate and the lower plate of the U-shaped chain plate 21 through the pins 5.

[0035] In this embodiment, an annular groove 2112 is provided in the first pin hole 211 of the upper plate of the U-shaped chain plate 21, and a wire retaining ring 51 is fixed to the upper end of the pin 5, and the wire retaining ring 51 is clamped in the corresponding annular groove 2112. Through the above structure, the pin 5 is prevented from falling off from the first pin hole 211 and the second pin hole 12.

[0036] In this embodiment, a slot 2111 is provided in the first pin hole 211 of the upper plate of the U-shaped chain plate 21, and an anti-rotation ear 52 is fixed to the upper end of the pin 5, and the anti-rotation ear 52 is engaged in the slot 2111. Through the above structure, the position of the pin 5 and the first pin hole 211 is fixed, the pin 5 is prevented from rotating in the first pin hole 211, and the wear of the first pin hole 211 of the U-shaped chain plate 21 is reduced.

[0037] In this embodiment, a plurality of reinforcing ribs 25 are arranged between the ballast plate 22, the pick tooth seat 23 and the U-shaped chain plate 21, the upper end of the reinforcing rib 25 extends to the bottom surface of the pick tooth seat 23 corresponding to the pick tooth 3, and the lower end of the reinforcing rib 25 extends to the top surface of the U-shaped chain plate 21. The reinforcing ribs 25 increase the stability of the pick tooth seat 23.

[0038] In this embodiment, an inclined through hole is provided in the pick-tooth seat 23, and the pick-tooth 3 is inserted into the pick-tooth seat 23 through the through hole. The rear end of the pick-tooth 3 protrudes from the pick-tooth seat 23, and an annular retaining spring groove 31 is provided at the protruding position. A retaining spring 4 is installed in the retaining spring groove 31, and one side of the retaining spring 4 abuts against the rear end of the pick-tooth seat 23. Preferably, the retaining spring 4 is in a petal shape, and the concave part effectively clamps the pick-tooth 3, and the convex part can effectively prevent the pick-tooth 3 from falling off from the through hole of the pick-tooth seat 23, and is convenient for disassembly using tools such as a screwdriver; during installation, the pick-tooth 3 is inserted into the through hole of the pick-tooth seat 23 until the conical head at the front end of the pick-tooth 3 is clamped, the retaining spring 4 is hooped in the retaining spring groove 31, and the retaining spring 4 is tightened, and the pick-tooth 3 is clamped in the pick-tooth seat 23 by the retaining spring 4 to prevent the pick-tooth 3 from falling off from the pick-tooth seat 23.

[0039] When the excavating chain of this embodiment is in use, the chain link 1 is first inserted into the U-shaped chain plate 21 whose front and rear ends need to be pinned, the pin shaft 5 is inserted into the corresponding first pin connection hole 31 and the second pin connection hole 13 for pin connection, and the steel wire is passed through the chain link 1 to connect the plates to form a complete chain. Driven by the railway screening machine driving device, the chain starts to move, and the front end of the scraper tooth 3 is inclined obliquely downward in the height direction of the scraper chain. The scraper plate that runs to the bottom of the sleeper loosens and scoops up the ballast, broken ballast and dirt under the sleeper through the scraper tooth 3. The broken ballast and dirt are scooped up by the scraper plate and fall into the receiving groove. Driven by the scraper chain, it moves to the top through the ascending guide groove. When the scraper plate containing the ballast, broken ballast and dirt moves to the top of the ascending guide groove Under the action of the centrifugal force of the scraping chain, the ballast, broken ballast and dirt are thrown into the screening device, the ballast, broken ballast and dirt are screened in the screening device, and the qualified ballast is backfilled into the roadbed; because the rising guide groove 6 and the descending guide groove of the excavation device are both inclined, that is, the scraping chain and the sleeper are inclined at a certain angle, when the scraping chain runs in the rising guide groove, the dirt and broken ballast are easily deposited downward along the gaps between the ballasts with vibration. After a long period of accumulation, the dirt and broken ballast will gradually squeeze the scraping chain and affect the operation of the scraping chain. A ballast discharge channel 14 is arranged on the lower side of the chain link 1, and the broken ballast and dirt accumulated on the inner wall and the lower wall of the rising guide groove 6 are guided to the containing groove through the ballast discharge channel to prevent the scraping chain from being squeezed outward by the dirt and broken ballast, affecting the operation of the scraping chain.

[0040] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent changes made using the contents of the present utility model specification and its drawings are included in the scope of rights of the present utility model.

Claims

1. A digging chain for a railway cleaning machine, comprising a plurality of digging plates (2), each of which is connected by a chain link (1) to form a digging chain as a whole, and the digging chain circulates between an ascending guide groove (6) and a descending guide groove, characterized in that: The pick plate (2) comprises a U-shaped chain plate (21), a ballast plate (22) and a pick tooth seat (23). The front end and the rear end of the U-shaped chain plate (21) are pin-connected to the front and rear chain links (1) respectively. The ballast plate (22) is fixed on the U-shaped chain plate (21). The pick tooth seat (23) is fixed on the upper end of the ballast plate (22). A plurality of inclined pick teeth (3) are arranged on the pick tooth seat (23). A scraper plate (24) is fixed at the bottom end of each ballast plate (22), and the scraper plate (24) and the top surface of the ballast plate (22) and the U-shaped chain plate (21) form a receiving groove for containing broken ballast and dirt; a ballast discharge channel (14) is formed between two adjacent U-shaped chain plates (21), and when the excavation chain runs into the ascending guide groove (6), the broken ballast and dirt in the gap between the scraper plate (2) and the ascending guide groove (6) enter the receiving groove through the ballast discharge channel (14).

2. The excavation chain of the railway screening machine according to claim 1, characterized in that: The numbers of the grating teeth (3) of two adjacent groups of grating plates (2) are different, and the grating teeth (3) of the two adjacent groups of grating plates (2) are staggered in the height direction.

3. The excavating and scraping chain of the railway screening machine according to claim 1, characterized in that: A fixing block (11) is fixed to the lower side of the chain link (1), and a U-shaped chain plate (21) pin-connected to the front end of the chain link (1) on the right side of the fixing block (11) forms a ballast discharge channel (14).

4. The excavating chain of the railway screening machine according to claim 1, characterized in that: An abutment block (13) is fixed on the outer side of the chain link (1), and the front end of the abutment block (13) abuts against the rear end of the ballast plate (22) of the grating plate (2) pin-connected to the front end of the chain link (1).

5. The excavating chain of the railway screening machine according to claim 1, characterized in that: The two ends of the U-shaped chain plate (21) are respectively provided with first pin shaft holes (211) penetrating the upper plate and the lower plate of the U-shaped chain plate (21); the two ends of the chain link (1) are provided with second pin shaft holes (12) connected to the first pin shaft holes (211); and pin shafts (5) are arranged in the first pin shaft holes (211) and the second pin shaft holes (12) at corresponding positions.

6. The excavating and scraping chain of the railway screening machine according to claim 5, characterized in that: An annular groove (2112) is provided in the first pin shaft hole (211) of the upper plate of the U-shaped chain plate (21), and a wire retaining ring (51) is provided at the upper end of the pin shaft (5), and the wire retaining ring (51) is clamped in the corresponding annular groove (2112).

7. The excavating and scraping chain of the railway screening machine according to claim 5, characterized in that: A clamping groove (2111) is provided in the first pin shaft hole (211) of the upper plate of the U-shaped chain plate (21), and an anti-rotation ear (52) is fixed to the upper end of the pin shaft (5), and the anti-rotation ear (52) is clamped in the clamping groove (2111).

8. The excavating and scraping chain of the railway screening machine according to claim 1, characterized in that: A plurality of reinforcing ribs (25) are arranged between the ballast plate (22), the tooth holder (23) and the U-shaped chain plate (21).

9. The excavating chain of the railway screening machine according to claim 1, characterized in that: The pick tooth (3) is inserted into the pick tooth seat (23), the rear end of the pick tooth (3) protrudes from the pick tooth seat (23), and an annular retaining spring groove (31) is provided at the protruding position, a retaining spring (4) is installed in the retaining spring groove (31), and one side of the retaining spring (4) abuts against the rear end of the pick tooth seat (23).

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