Mining dumbbell pin, mining middle trough and mining scraper conveyor

Abstract

A mining dumbbell pin comprises a pin rod and hammer bodies arranged at the two ends of the pin rod. The side face of the hammer body is in a D shape when viewed, the outer side arc face of the hammer body is in an elliptical paraboloid shape, a limiting protruding part is arranged at the end, away from the pin rod, of the hammer body, a shaft rod is arranged at the end, away from the pin rod, of the limiting protruding part, and a pin hole is formed in the shaft rod. According to the dumbbell pin, the hammer body of the dumbbell pin is designed to be in the oval paraboloid shape, when the dumbbell pin is subjected to bending force, the dumbbell pin still has a large stress area, the dumbbell pin has the advantage of being even in stress, the stress concentration phenomenon is not prone to occurring, and the dumbbell pin can be prevented from cracking; and secondly, the hammer body of the dumbbell pin is in the shape of the elliptical paraboloid, so that the self weight of the dumbbell pin is effectively reduced, and huge economic benefits and convenience are brought in the transferring, carrying, transporting, mounting and dismounting processes. The utility model further provides a mining middle trough and a mining scraper conveyor.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine mechanical equipment, in particular to a mine-use dumbbell pin, a mine-use middle trough and a mine-use scraper conveyor. Background Technique

[0002] Scraper conveyors and scraper loaders are often used in coal mine underground working faces, and are used in supporting with shearer loaders and hydraulic supports, and can realize the comprehensive mechanized coal mining of the processes such as coal caving, coal loading, coal transportation and coal chute pushing in the coal winning face. In coal mine exploitation, due to complex working conditions and the pushing of hydraulic supports, relative displacement, bending and stretching often occur between the troughs, so that the connectors between the troughs are subjected to greater shear force and tensile force. The trough is a key component for transporting coal. Dumbbell pins are usually used as connectors between the troughs. During the use of the equipment, the failure and fracture of the connectors between the troughs will cause the connection failure between the troughs. Compared with bolt connection, the dumbbell pin can bear greater shear force and tensile force. It can not only be used as a static connector, but also allow relative movement between the troughs, and has the characteristics of reliable operation.

[0003] However, in the design and production of traditional dumbbell pins, in order to obtain sufficient strength and stiffness and leave a surplus safety factor, the pin rod of the dumbbell pin is usually designed as a cylindrical shape with a larger diameter, and the shape of the dumbbell body is a plane or composed of multiple planes. Although the dumbbell pin designed and manufactured in this way can obtain sufficient strength and stiffness to ensure that the dumbbell pin does not fail and fracture during actual use. However, blindly increasing the size will cause the strength of the dumbbell pin to be greater than the strength of the trough rib. If the trough is subjected to a large accidental impact force during operation, the trough itself will be fractured and deformed, which will bring greater economic losses. At the same time, the plane edges and corners of the dumbbell body and the plane cooperating with the fixture block are prone to stress concentration when subjected to bending force, resulting in cracks that may occur in the dumbbell pin. Summary of the Invention

[0004] In view of this, in order to solve the technical problems existing in the above technology, it is necessary to provide a mine-use dumbbell pin.

[0005] A mine-use dumbbell pin includes a pin rod and hammer bodies arranged at both ends of the pin rod; the side view of the hammer body is in a D shape, and the outer arc surface of the hammer body is in an elliptical paraboloid shape. A limit convex portion is arranged at one end of the hammer body far away from the pin rod, and a shaft rod is arranged at one end of the limit convex portion far away from the pin rod, and a pin hole is opened on the shaft rod.

[0006] Preferably, the limit convex portion is an irregular rectangle, that is, one surface of the limit convex portion facing the parallel outer side surface of the hammer body bulges outwards, and the side view of the bulging portion is in an inverted V shape.

[0007] Preferably, the diameter of the shaft rod is smaller than the diameter of the pin rod.

[0008] Preferably, an annular groove is formed at the middle position along the outer wall of the pin rod.

[0009] Preferably, a filling cavity is formed inside the pin rod, and luminous powder is filled in the filling cavity.

[0010] Preferably, the filling cavity is in an L-shaped structure, and a sealing plug is arranged at the inlet end of the filling cavity.

[0011] A mining middle trough is also provided.

[0012] A mining middle trough includes the above-mentioned mining dumbbell pin and a middle trough body.

[0013] Preferably, a clamping block is arranged on the middle trough body, an installation groove adapted to the hammer body is arranged on the clamping block, and a round hole through which the shaft rod can pass is formed at the bottom of the installation groove.

[0014] Another mining scraper conveyor is also provided.

[0015] A mining scraper conveyor includes the above-mentioned mining middle trough.

[0016] Compared with the prior art, the mining dumbbell pin provided by the present utility model includes a pin rod and hammer bodies arranged at both ends of the pin rod; the hammer bodies are in an elliptical paraboloid shape, a cylindrical protrusion is arranged at one end of the hammer body far away from the pin rod, a shaft rod is arranged at one end of the protrusion far away from the pin rod, and a pin hole is formed on the shaft rod. In the present utility model, the hammer bodies of the dumbbell pin are designed in an elliptical paraboloid shape, when the dumbbell pin is subjected to a bending force, it still has a large stress-bearing area, has the characteristic of uniform stress, is not prone to stress concentration phenomenon, and can prevent the dumbbell pin from cracking; secondly, the hammer bodies of the dumbbell pin are in an elliptical paraboloid shape, effectively reducing the self-weight of the dumbbell pin, bringing great economic benefits and convenience during the processes of transfer, handling, transportation, installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the present utility model.

[0019] Figure 2 For the present utility model Figure 1 is a schematic side view structure diagram.

[0020] Figure 3 For the present utility modelFigure 1 Top view structural schematic diagram.

[0021] Figure 4 This is a Figure 1 Cross-sectional structural schematic diagram of the present utility model.

[0022] Figure 5 Structural schematic diagram of the clamping block of the present utility model.

[0023] Figure 6 Structural schematic diagram of the present utility model installed on the clamping block.

[0024] In the figure: pin rod 01, hammer body 02, limit convex part 03, shaft rod 04, pin hole 05, annular groove 06, filling cavity 07, clamping block 08, installation groove 09, round hole 10. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0026] In the description of the present utility model, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc. indicating orientation or positional relationships are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0027] Please refer to Figures 1 to 3 , in one embodiment, the present utility model provides a mining dumbbell pin, including a pin rod 01 and hammer bodies 02 arranged at both ends of the pin rod 01; the side view of the hammer body 02 is D-shaped, and the outer arc surface of the hammer body 02 is an elliptical paraboloid. By removing the plane edges and corners at the hammer body 02 of the dumbbell pin, the self-weight of the dumbbell pin is reduced, and the stress concentration phenomenon at the hammer body 02 is weakened to prevent cracking during use under extrusion; when the dumbbell pin is subjected to a bending force, it still has a large stress-bearing area and has the characteristic of uniform stress. A limit convex part 03 is arranged at one end of the hammer body 02 far from the pin rod 01, and the length of the limit convex part 03 is less than the length of the hammer body 02. A shaft rod 04 is arranged at one end of the limit convex part 03 far from the pin rod 01, and a pin hole 05 is opened on the shaft rod 04 to facilitate the insertion of a limit pin, thereby facilitating the installation of the dumbbell pin.

[0028] Among them, the limiting convex part 03 is an irregular rectangle, that is, one side of the limiting convex part 03 facing the parallel outer side of the hammer body 02 protrudes outward, and the side view of the protruding part is an inverted V shape.

[0029] Among them, the diameter of the shaft rod 04 is smaller than the diameter of the pin rod 01.

[0030] In one embodiment, an annular groove 06 is provided at the middle position of the outer wall of the pin rod 01; thus, the two ends of the pin rod 01 are thick and the middle part is thin. When the dumbbell pin is subjected to the shear force generated during the normal operation of the equipment, the effective connection of the middle groove body can be ensured. When the scraper conveyor or the transfer machine is subjected to an accidental large impact force, the dumbbell pin can effectively protect the middle groove body from bending deformation. Secondly, the weight of the dumbbell pin itself can be effectively reduced, and the transportation cost can be lowered. During packaging and transportation, the annular groove 06 can be used as a fixed position for the binding rope and a force-bearing positioning groove. When disassembling the dumbbell pin from the middle groove body, the annular groove 06 can be used as a force-bearing groove to disassemble the dumbbell pin from the socket of the groove body.

[0031] Please refer to Figure 4 , in one embodiment, a filling cavity 07 is provided inside the pin rod 01, and luminous powder is filled in the filling cavity 07. Specifically, the filling cavity 07 has an L-shaped structure, and a sealing plug is provided at the inlet end of the filling cavity 07. When the special self-luminous marking material is exposed, the specific position of the broken dumbbell pin in the working face can be quickly judged by detecting the special self-luminous marking material, reducing the manual inspection time and labor cost.

[0032] Please refer to Figure 5 , Figure 6 , in one embodiment, the present invention provides a mining middle trough, including the mining dumbbell pin and the middle trough body.

[0033] It should be further noted that a clamping block 08 is provided on the middle trough body, an installation groove 09 adapted to the hammer body 02 is provided on the clamping block 08, and a round hole 10 through which the shaft rod 04 can pass is provided at the bottom of the installation groove 09.

[0034] In one embodiment, the present invention provides a mining scraper conveyor, including the mining middle trough.

[0035] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all 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 mining dumbbell pin, characterized in that: It includes a pin rod and hammer bodies arranged at both ends of the pin rod; the side view of the hammer body is D-shaped, and the outer arc surface of the hammer body is an elliptical paraboloid. A limiting convex portion is provided at one end of the hammer body away from the pin rod, and a shaft rod is provided at one end of the limiting convex portion away from the pin rod. A pin hole is provided on the shaft rod.

2. The mining dumbbell pin according to claim 1, characterized in that: The limiting convex portion is an irregular rectangle, that is, one side of the limiting convex portion facing the parallel outer side of the hammer body bulges outward, and the side view of the bulging portion is an inverted V shape.

3. The mine-use dumbbell pin according to claim 2, wherein: The diameter of the shaft rod is smaller than the diameter of the pin rod.

4. The mine-used dumbbell pin according to claim 1, characterized in that: An annular groove is provided at the middle position along the outer wall of the pin rod.

5. The mine-use dumbbell pin according to claim 4, wherein: A filling cavity is provided inside the pin rod, and luminous powder is filled in the filling cavity.

6. The mining dumbbell pin according to claim 5, characterized in that: The filling cavity has an L-shaped structure, and a sealing plug is provided at the inlet end of the filling cavity.

7. A mining middle trough, characterized in that: It includes the mine-use dumbbell pin according to any one of claims 1-6, and a middle groove body.

8. The mined middle trough according to claim 7, wherein: A clamping block is provided on the middle groove body, and an installation groove adapted to the hammer body is provided on the clamping block. A round hole through which the shaft rod can pass is provided at the bottom of the installation groove.

9. A mining scraper conveyor, characterized in that: It includes the mine-use middle groove according to claim 7.

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