Middle trough capable of preventing coal leakage between troughs and scraper conveyor

Abstract

The invention provides a middle trough capable of preventing coal leakage between troughs and a scraper conveyor, and relates to the technical field of scraper conveyors, convex tenons and concave tenons are arranged at the two ends of a shovel plate ledge and the two ends of a baffle ledge of a middle trough body correspondingly, and the convex tenons and the concave tenons are used for connecting the adjacent middle trough bodies; the outer side end face of the convex tenon is a vertical face, and the distance between the outer side end face and the outer edge of the upper side of the ledge is larger than that between the outer side end face and the outer edge of the lower side of the ledge; the distance between the inner end face and the outer edge of the upper side of the ledge is larger than the distance between the inner end face and the outer edge of the lower side of the ledge. When the middle grooves are connected, the convex tenons are inserted into the concave tenons, so that the contact area of the middle grooves during connection is increased by increasing the contact area of the convex tenons and the concave tenons; the two ends of a middle plate of the middle trough body are provided with halfpace structures used for being in lap joint with the adjacent middle trough body respectively. According to the scheme, coal leakage between the grooves can be prevented, and meanwhile the service life of the middle groove is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of scraper conveyors, and particularly to an intermediate trough and a scraper conveyor for preventing coal leakage between troughs. Background Art

[0002] The intermediate trough is an important component of the scraper conveyor, carrying the transportation tasks of the scraper chain and materials. During actual use, two intermediate troughs are connected through a dumbbell pin assembly in the internal space of the intermediate trough tenon. The middle plates of the intermediate troughs are overlapped through concave and convex notches to ensure that the intermediate troughs can be normally connected under certain horizontal and vertical bending conditions.

[0003] However, since the intermediate troughs are flexibly connected through dumbbell pins, when the concave and convex notches between the intermediate troughs are worn, gaps will be generated when the intermediate troughs are pulled, resulting in the materials such as raw coal on the middle plate of the upper chain path of the intermediate trough falling onto the lower chain path of the intermediate trough, leading to coal leakage between the troughs, causing the problem of the bottom chain of the scraper conveyor pulling back coal, generating additional power consumption for the whole machine. And the returned coal accumulates in the lower chain path, blocking the chain path over time, increasing the resistance and being difficult to clean, ultimately resulting in the equipment being unable to work normally.

[0004] In addition, generally, the two ends of the intermediate trough of the scraper conveyor are respectively two structures of a male tenon and a female tenon. When two intermediate troughs are connected, the male tenon is inserted into the female tenon. The surface of the tenon is tapered to facilitate centering, and at the same time, a dumbbell pin assembly is used for fastening connection. However, when the intermediate trough bears excessive bending, it is easy to cause the dumbbell pin to bend or break. Summary of the Invention

[0005] In view of this, in view of the above deficiencies, it is necessary to propose an intermediate trough and a scraper conveyor for preventing coal leakage between troughs to prevent coal leakage between troughs and at the same time extend the service life of the intermediate trough.

[0006] In a first aspect, the present invention provides an intermediate trough for preventing coal leakage between troughs, including an intermediate trough body. Both ends of the scraper plate trough side and the baffle trough side of the intermediate trough body are respectively provided with a male tenon and a female tenon, and the male tenon and the female tenon are used to connect adjacent intermediate trough bodies; the outer end face of the male tenon is a vertical plane, and the distance between the outer end face and the upper outer edge of the trough side is greater than the distance between the outer end face and the lower outer edge of the trough side; the inner end face of the female tenon is a vertical plane, and the distance between the inner end face and the upper outer edge of the trough side is greater than the distance between the inner end face and the lower outer edge of the trough side; when the intermediate troughs are connected, the male tenon is inserted into the female tenon to increase the contact area between the upper side of the outer surface of the male tenon and the upper side of the outer surface of the female tenon, thereby increasing the contact area when the intermediate troughs are connected; both ends of the middle plate of the intermediate trough body are respectively provided with a stepped structure for overlapping with an adjacent intermediate trough body.

[0007] Preferably, the male tenon is a U-shaped structure.

[0008] Preferably, the upper and lower sides of the outer surface of the tenon head of the U-shaped structure are both flat surfaces.

[0009] Preferably, the upper and lower sides of the outer surface of the tenon head of the U-shaped structure are both inclined surfaces, and the dimensions gradually decrease from the outer end face towards the trough rib.

[0010] Preferably, the outer surface of the tenon head of the U-shaped structure is a curved surface structure.

[0011] Preferably, the inner surface of the mortise head is a curved surface structure.

[0012] Preferably, the middle plate of the middle trough body is arranged in a trapezoidal structure with an upper concave and lower convex shape at the end where the tenon head is located, and in a trapezoidal structure with an upper convex and lower concave shape at the end where the mortise head is located.

[0013] Preferably, in the trapezoidal structure with an upper concave and lower convex shape, the horizontal part is an inclined surface, and this inclined surface slopes downward from the outside of the trapezoidal structure towards the middle plate.

[0014] In a second aspect, the present invention also provides a scraper conveyor, including the middle trough for preventing coal leakage between troughs as described in any one of the first aspect.

[0015] As can be seen from the above technical solutions, in the middle trough for preventing coal leakage between troughs provided by the present invention, tenon heads and mortise heads are respectively arranged at both ends of the scraper trough rib and the baffle trough rib of the middle trough body for connecting adjacent middle trough bodies. Moreover, the outer end face of the tenon head is a vertical surface, and the distance between the outer end face and the upper outer edge of the trough rib is greater than the distance between the outer end face and the lower outer edge of the trough rib; while the inner end face of the mortise head is a vertical surface, and the distance between the inner end face and the upper outer edge of the trough rib is greater than the distance between the inner end face and the lower outer edge of the trough rib. In this way, when the middle troughs are connected, the tenon head is inserted into the mortise head, so that the contact area between the upper side of the outer surface of the tenon head and the upper side of the outer surface of the mortise head can be increased to increase the contact area when the middle troughs are connected. By increasing the contact area of the middle trough connection, the pressure borne by the dumbbell pin during the bending of the middle trough can be shared, reducing the force on the dumbbell pin, and at the same time improving the bending and compressive resistance of the middle trough, thereby improving the service life of the middle trough. In addition, trapezoidal structures for lapping with adjacent middle trough bodies are respectively arranged at both ends of the middle plate of the middle trough body. In this way, when two middle troughs are connected, the middle plates are lapped through the trapezoidal structures at the end sides. Due to the action of gravity and the bending of the middle trough during production, the lapping part has a good self-locking function, thereby improving the sealing performance between troughs, preventing coal leakage between troughs, and helping to improve the utilization rate of the overall machine power. Description of the Drawings

[0016] Figure 1Schematic diagram of a middle trough for preventing coal leakage between troughs provided by an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of a structure with an inclined surface on the upper side of a tenon head provided by an embodiment of the present invention.

[0018] Figure 3 Schematic diagram of a structure with a flat surface on the upper side of a tenon head provided by an embodiment of the present invention.

[0019] Figure 4 Dimension marking diagram of a tenon head and a mortise head provided by an embodiment of the present invention.

[0020] Figure 5 Schematic diagram of a frustum structure provided by an embodiment of the present invention.

[0021] In the figure: middle trough body 10, scraper trough rib 11, baffle trough rib 12, tenon head 13, mortise head 14, middle plate 15, frustum structure 16, upper concave and lower convex structure 161, upper convex and lower concave structure 162. Specific embodiments

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] See Figures 1-5 , a middle trough for preventing coal leakage between troughs provided by an embodiment of the present invention includes a middle trough body 10. Tenon heads 13 and mortise heads 14 are respectively arranged at both ends of the scraper trough rib 11 and the baffle trough rib 12 of the middle trough body 10. The tenon heads 13 and the mortise heads 14 are used to connect adjacent middle trough bodies 10; the outer end surface of the tenon head 13 is a vertical surface, and the distance between the outer end surface and the upper outer edge of the trough rib is greater than the distance between the outer end surface and the lower outer edge of the trough rib; the inner end surface of the mortise head 14 is a vertical surface, and the distance between the inner end surface and the upper outer edge of the trough rib is greater than the distance between the inner end surface and the lower outer edge of the trough rib; when the middle troughs are connected, the tenon head 13 is inserted into the mortise head 14 to increase the contact area between the upper side of the outer surface of the tenon head 13 and the upper side of the outer surface of the mortise head 14, thereby increasing the contact area when the middle troughs are connected; both ends of the middle plate 15 of the middle trough body 10 are respectively provided with a frustum structure 16 for lapping with an adjacent middle trough body 10.

[0024] Generally, the two ends of the middle trough of a scraper conveyor are respectively two structures: a male tenon 13 and a female tenon 14. When two middle troughs are connected, the male tenon 13 is inserted into the female tenon 14. The surface of the tenon is tapered to facilitate centering, and at the same time, a dumbbell pin assembly is used for fastening connection. However, when the middle trough bears excessive bending, it is easy to cause the dumbbell pin to bend or break. Based on this, in this embodiment, it is considered to design the outer end face of the male tenon 13 as a vertical plane, and the distance A between the outer end face and the upper outer edge of the trough side is greater than the distance B between the outer end face and the lower outer edge of the trough side; while the inner end face of the female tenon 14 is a vertical plane, and the distance a between the inner end face and the upper outer edge of the trough side is greater than the distance b between the inner end face and the lower outer edge of the trough side. In this way, when the middle troughs are connected, the male tenon 13 is inserted into the female tenon 14, so that the contact area between the upper side of the outer surface of the male tenon 13 and the upper side of the outer surface of the female tenon 14 can be increased, thereby increasing the contact area when the middle troughs are connected. By increasing the contact area of the middle trough connection, the pressure borne by the dumbbell pin during the bending of the middle trough can be shared, reducing the force on the dumbbell pin, and at the same time improving the bending and compressive resistance of the middle trough, thus improving the service life of the middle trough.

[0025] In addition, due to the limitation of the lap joint method of the middle plate 15 in the traditional middle trough, the amount of coal leakage between the coals is relatively large, resulting in serious situation of the bottom chain of the scraper conveyor pulling back the coal, and the extra power consumption of the whole machine is large. Therefore, in this embodiment, it is considered to improve the lap joint method of the interface of the middle plate 15. The specific improvement is to respectively set a stepped structure 16 for lapping with the adjacent middle trough body 10 at both ends of the middle plate 15 of the middle trough body 10. In this way, when two middle troughs are connected, the middle plate 15 is lapped through the stepped structure 16 at the end side. Due to the action of gravity and the bending of the middle trough during production, the lap joint has a good self-locking function, thereby improving the sealing performance between the troughs, preventing coal leakage between the troughs, and helping to improve the utilization rate of the power of the whole machine.

[0026] In one embodiment, the male tenon 13 can be a U-shaped structure, and both the upper side and the lower side of the outer surface of the U-shaped male tenon 13 are planes. In this way, in some application environments where the bending of the middle trough is not particularly large, the connection through the tenon structure of this plane can provide good support for the connection of the middle trough.

[0027] In another embodiment, the tenon 13 is of a U-shaped structure, and the upper and lower sides of the outer surface of the tenon 13 of the U-shaped structure are both inclined surfaces, and the size gradually decreases from the outer end face towards the trough rib. In this way, in an environment where the middle trough is relatively sensitive to bending, when the middle trough is bent during the production process, the front end of the tenon 13, due to its largest size, will first abut against the inner surface of the mortise 14 at this time, that is, part of the force on the dumbbell pin is borne by the tenon in time, greatly reducing the force on the dumbbell pin. Even when the middle trough undergoes excessive bending, the dumbbell pin will not be bent or broken due to excessive force, improving the service life of the dumbbell pin.

[0028] In addition, in yet another embodiment, the outer surface of the tenon 13 of the U-shaped structure is a curved surface structure, while the inner surface of the mortise 14 is a curved surface structure. The traditional matching method of the tenon 13 and the mortise 14 of the middle trough is a straight-line match. During the actual production process of the middle trough, it is always in a bent state, and the straight tenon cannot better make the tenons contact and match with each other because a straight line cannot generate a curve and cannot deform when bent. In this embodiment, by designing the tenon as a curved surface structure, during the bending process of the middle trough, the curved surface tenon structure has a higher connection freedom, so that the tenon 13 and the mortise 14 can better fit and contact, preventing the occurrence of suspension and non-contact situations.

[0029] Moreover, the positioning of the traditional middle trough completely relies on the dumbbell pin for positioning. The dumbbell pin is a forging, and the surface finish and the tolerance of the outer dimension are relatively large. At the same time, the outer shapes of the tenons of the middle trough are all cast, and the tolerance of the casting process is larger than that of forging. The above two errors will cause the slot misalignment between the troughs to be significantly larger than the theoretical value during the actual use of the middle trough. In this embodiment, a matching method similar to a keyway is adopted on the upper side of the tenon of the middle trough. The tenon 13 is recessed above, and the mortise 14 protrudes above, so that its positioning does not completely rely on the dumbbell pin, and the positioning accuracy will be greatly improved, preventing the gap between the middle troughs from being too large when fully separated.

[0030] In addition, in one embodiment, the tenon 13 can also be set to a two-end structure. The first part close to the trough rib is an inclined surface or a straight surface. One end of this part is used to connect with the trough rib to play a supporting role, and the other end is connected to the second part of the U-shaped structure. The outer surface of this part of the U-shaped structure is a curved surface. In this way, the first part plays a supporting role, and the second part can improve the freedom of movement. The top of the tenon 13 of the middle trough rib is recessed inward, and the top of the mortise 14 protrudes outward. When the middle trough is connected, the tenon 13 is inserted into the mortise 14, and the protruding head of the mortise 14 is inserted into the groove of the tenon 13, playing the role of keyway matching.

[0031] In one embodiment, the middle plate 15 of the middle chute body 10 at the end where the male tenon 13 is located is provided with a trapezoidal structure 16 that is concave upward and convex downward, and the end where the female tenon 14 is located is provided with a trapezoidal structure 16 that is convex upward and concave downward.

[0032] In this embodiment, the end side of the middle plate 15 of the middle chute body 10 adopts an overlapping method, that is, between two connected middle chutes, one is a concave-upward and convex-downward structure 161, and the other is a convex-upward and concave-downward structure 162. In this way, the two overlap each other, which can improve the sealing performance between the chutes, prevent coal leakage between the chutes, and greatly improve the power utilization of the scraper conveyor.

[0033] In order to further improve the sealing effect between the middle chutes, in one embodiment, it is considered that in the trapezoidal structure 16 that is concave upward and convex downward, the horizontal part is an inclined plane, and this inclined plane slopes downward from the outside of the trapezoidal structure 16 towards the middle plate 15. In this way, when the middle chute bends, the connection part is stressed downward. Due to the horizontal part of the trapezoidal structure 16 that is concave upward and convex downward being an inclined plane, the middle plate 15 on the convex-upward and concave-downward side will tilt towards the middle plate 15 on the concave-upward and convex-downward side due to the gap in the horizontal part of the trapezoidal structure 16, thereby closing the gap between the two middle plates 15 and realizing the sealing between the middle chutes to prevent coal leakage between the chutes.

[0034] In addition, the present invention also provides a scraper conveyor, including a middle chute that is accurately positioned and connected between the anti-coal-leakage chutes as described in any of the above embodiments.

[0035] In summary, the middle chute and the scraper conveyor provided by the present invention for preventing coal leakage between chutes have at least the following beneficial effects: 1. The present invention can improve the reliability of the connection of the middle chute; the overlapping surface of the middle chute is enlarged to ensure the connection of the middle chute, and the multi-degree of freedom of the tenon can weaken the stress condition of the dumbbell pin.

[0036] 2. The present invention can extend the service life of the middle chute. The end is adopted with a spherical structure to reduce wear.

[0037] 3. The middle plate interface of the present invention has a good self-locking function, which can improve the sealing performance between the chutes, prevent coal leakage between the chutes, and greatly improve the utilization rate of the power of the whole machine.

[0038] The modules or units in the device of the embodiment of the present invention can be combined, divided, and deleted according to actual needs. The above-disclosed is only the preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited by this. Those of ordinary skill in the art can understand the whole or part of the processes of the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A middle trough for preventing coal leakage between troughs, characterized in that, It includes a middle trough body. Tenons and mortises are respectively arranged at both ends of the spading trough rib and the baffle trough rib of the middle trough body. The tenons and mortises are used to connect adjacent middle trough bodies. The outer end face of the tenon is a vertical plane, and the distance between the outer end face and the upper outer edge of the trough rib is greater than the distance between the outer end face and the lower outer edge of the trough rib. The inner end face of the mortise is a vertical plane, and the distance between the inner end face and the upper outer edge of the trough rib is greater than the distance between the inner end face and the lower outer edge of the trough rib. When the middle troughs are connected, the tenon is inserted into the mortise to increase the contact area when the middle troughs are connected by increasing the contact area between the upper side of the outer surface of the tenon and the upper side of the outer surface of the mortise. Ladder structures for lapping with adjacent middle trough bodies are respectively arranged at both ends of the middle plate of the middle trough body.

2. The middle trough for preventing coal leakage between troughs according to claim 1, wherein The tenon is of a U-shaped structure.

3. The middle trough for preventing coal leakage between troughs according to claim 2, characterized in that, Both the upper side and the lower side of the outer surface of the U-shaped tenon are planes.

4. The middle trough for preventing coal leakage between troughs according to claim 2, characterized in that, Both the upper side and the lower side of the outer surface of the U-shaped tenon are inclined planes, and the dimensions gradually decrease from the outer end face towards the trough rib.

5. The middle trough for preventing coal leakage between troughs according to claim 2, characterized in that, The outer surface of the U-shaped tenon is of a curved surface structure.

6. The middle trough for preventing coal leakage between troughs according to claim 5, characterized in that The inner surface of the mortise is of a curved surface structure.

7. The middle trough for preventing coal leakage between troughs according to claim 1, wherein The middle plate of the middle trough body is provided with a ladder structure that is concave upward and convex downward at the end where the tenon is located, and a ladder structure that is convex upward and concave downward at the end where the mortise is located.

8. The middle trough for preventing coal leakage between troughs according to claim 7, characterized in that, In the ladder structure that is concave upward and convex downward, the horizontal part is an inclined plane, and the inclined plane slopes downward from the outside of the ladder structure towards the middle plate.

9. A scraper conveyor, characterized in that, It includes the middle trough for preventing coal leakage between troughs as described in any one of claims 1 to 8.

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