Cutting pick assembly protection device

Abstract

The utility model provides a cutting pick assembly protection device, which comprises an expanding digging plate, a screw and a screw hole, the screw hole is arranged on the side wall of a high-position end cover ring, and the expanding digging plate is fixed on the high-position end cover ring by installing the screw in the screw hole. And a wear-resistant welding layer is arranged on the peripheral surface of the expanding digging plate. The expanding excavation plate is convenient to mount and easy to dismount, and the cutting teeth are protected. The wear-resistant welding layer is arranged on the outer surface of the expanding excavation plate, so that the contact area between the expanding excavation plate and the coal seam is increased, the expanding excavation plate participates in the rock breaking process of the coal wall, the expanding excavation performance of the end disc is improved, and the mining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a pick assembly of a coal mining machine, in particular to a detachable protective device of the pick assembly. Background Art

[0002] When the coal mining machine is working, the rotation of the drum drives the pick assembly on the end cover and the end plate assembly to rotate along the central axis of the drum to achieve end face coal seam mining. In order to reduce the force on the pick assembly, a guard plate will be welded on the end cover to reduce the wear of the coal rock on the tooth sleeve and the tooth seat.

[0003] However, during use, Figure 1 The pick assembly shown in the figure often breaks due to excessive force, and the end cover guard plate needs to be cut off and then re-welded after being worn, which seriously affects the mining efficiency of the coal mining machine and also affects the normal production of the coal mine. The end plate guard plate is usually installed by welding, which is a time-consuming process and is prone to secondary damage to the drum. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a protection device for a pick assembly, wherein the protection device is a detachable structure and can be easily replaced.

[0005] The utility model provides a protection device, comprising an expansion plate, screws and screw holes, wherein the screw holes are located on the side walls of a high-position end cover ring, and the expansion plate is installed in the screw holes through screws to fix the expansion plate on the high-position end cover ring.

[0006] Furthermore, the expansion plate is in the shape of a circular ring. Two or more expansion plates are evenly distributed on the high-position end cover ring.

[0007] Furthermore, the angle formed by the diameter of the high end cover ring corresponding to the expansion plate is 30 to 60 degrees, the width of the expansion plate is 10 to 40 mm, and the height of the expansion plate is 80 to 200 mm.

[0008] Furthermore, the top of the expansion plate is higher than the top of the cutting tooth.

[0009] Furthermore, a wear-resistant welding layer is provided on the surrounding surface of the expansion plate. Preferably, the wear-resistant welding layer is tungsten carbide.

[0010] Furthermore, the material of the expansion plate is steel.

[0011] In summary, the expansion plate of the utility model is not only easy to install and disassemble, but also protects the pick. The wear-resistant welding layer is arranged on the outer surface of the expansion plate, which is conducive to increasing the contact area between the expansion plate and the coal seam, so that the expansion plate participates in the rock breaking process of the coal wall, increases the expansion performance of the end plate, and improves the mining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A prior art protection device is shown.

[0013] Figure 2 Shows the structure of the protective device of the utility model Figure 1 .

[0014] Figure 3 Shows the structure of the protective device of the utility model Figure 2 .

[0015] Component number description

[0016] 100-Cut assembly protection device

[0017] 01-Cut assembly

[0018] 011-Cut teeth

[0019] 02-High end cover ring

[0020] 03-Expansion plate

[0021] 04-Screw

[0022] 05-Screw hole

[0023] 06-Wear-resistant welding layer

[0024] 07–Guard Plate DETAILED DESCRIPTION

[0025] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0026] See also Figures 1 to 3 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0027] Figure 2 Shows the structure of the protective device of the utility model Figure 1 . Figure 3Shows the structure of the protective device of the utility model Figure 2 .

[0028] like Figure 2 and Figure 3 As shown, the pick assembly 01 includes a plurality of picks 011, and all the picks 011 are evenly distributed around the high-position end cover ring 02. The pick assembly protection device 100 includes an expansion plate 03 and screws 04, wherein a screw hole 05 matching the screw 04 is provided on the side wall of the high-position end cover ring 02, and the expansion plate 03 is annular, and the expansion plate 03 is fixed to the high-position end cover ring 02 by installing the screw 04 in the screw hole 05. The screw 04 and the screw hole 05 enable the expansion plate 03 to be quickly installed and removed. When the expansion plate 03 is worn or broken, the expansion plate 03 can be quickly replaced by removing the screw 04. Preferably, the material of the expansion plate 03 is steel.

[0029] like Figure 2 and Figure 3 As shown, the apex angle α of the triangle formed by the length L of the expansion plate 03 and the diameter R of the high end cover ring 02 is 30 to 60 degrees, the width W is 10 to 40 mm, and the height H is 80 to 200 mm. The top of the expansion plate 03 is higher than the top of the pick 011, so the expansion plate 03 can protect the pick 011, avoid wear on the tooth sleeve and the tooth seat of the pick 011, and reduce the loss of the pick 011 in the coal wall breaking process.

[0030] In another embodiment, a wear-resistant welding layer 06 is provided on the outer surface of the expansion plate 03, which is beneficial to increase the contact area between the expansion plate 03 and the coal seam, so that the expansion plate 03 participates in the rock breaking process of the coal wall. Preferably, the wear-resistant welding layer 06 is tungsten carbide.

[0031] The coal wall is broken together by the pick 011 and the expansion plate 03, which is beneficial to reducing the stress level of the pick 011, thereby reducing the possibility of the pick 011 breaking.

[0032] In summary, the utility model increases the digging performance of the end plate and improves the replacement efficiency while ensuring that the end plate pick is protected, thus providing a guarantee for the normal and efficient mining of the coal mine.

[0033] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A pick assembly protection device, characterized in that: It comprises an expansion plate, screws and screw holes, wherein the screw holes are located on the side walls of the high-position end cover ring, and the screws are installed in the screw holes so that the expansion plate is fixed on the high-position end cover ring.

2. A pick assembly protection device according to claim 1, characterized in that: The expansion plate is in the shape of a circular ring.

3. A pick assembly protection device according to claim 1, characterized in that: The angle formed by the diameter of the high-position end cover ring corresponding to the expansion plate is 30 to 60 degrees, the width of the expansion plate is 10 to 40 mm, and the height of the expansion plate is 80 to 200 mm.

4. A pick assembly protection device according to claim 1, characterized in that: The top of the expansion plate is higher than the top of the cutting tooth.

5. A pick assembly protection device according to claim 1, characterized in that: A wear-resistant welding layer is arranged on the surrounding surface of the expansion plate.

6. A pick assembly protection device as claimed in claim 5, characterized in that: The wear-resistant welding layer is tungsten carbide.

7. A pick assembly protection device according to claim 1, characterized in that: The material of the expansion plate is steel.

8. A pick assembly protection device as claimed in claim 2, characterized in that: Two or more expansion plates are evenly distributed on the high-position end cover ring.

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