Coal mine underground anti-blocking jaw crusher and wear-resistant lining plate structure thereof

Abstract

The utility model discloses an underground coal mine anti-blocking jaw crusher and a wear-resistant lining plate structure thereof, and relates to the technical field of lining plates, the underground coal mine anti-blocking jaw crusher comprises a lining plate body, and a wear-resistant layer is coated on the lining plate body; the mounting hole is vertically formed in the smooth position of the vertex angle of the lining plate body; the containing cavity is formed in the inner wall of the mounting hole, and the containing cavity is formed in the radial direction of the mounting hole; the rotating rods are rotationally connected to the side, close to bolt installation, of the interior of the containing cavity along the vertical face of the lining plate body, and elastic pieces for extruding the free ends of the rotating rods towards the interior of the installation hole are installed in the containing cavity; the conical column is fixed to the free end of the rotating rod in the length direction of the rotating rod. Through the combined use of the rotating rod, the conical column and the elastic strip, the tip end of the conical column can abut against the interior of the threaded groove of the bolt after the bolt is installed, the bolt is limited to be separated from the interior of the installation hole, and therefore the lining plate body is prevented from loosening.

Description

Technical Field

[0001] This utility model relates to the field of liner technology, specifically to an anti-clogging jaw crusher for underground coal mines and its wear-resistant liner structure. Background Technology

[0002] In underground coal mine operations, jaw crushers are the core equipment for ore crushing, and the reliability and wear resistance of their liner structure directly affect the equipment's service life and production efficiency. Currently, the wear-resistant liners of jaw crushers are typically fixed to the machine body with bolts, but the underground environment has the following significant characteristics:

[0003] Frequent vibrations: The continuous mechanical vibrations generated during ore crushing, as well as the environmental vibrations caused by the operation of underground transportation equipment, can easily lead to loose bolts.

[0004] Dust and humid environment: The high dust concentration in underground coal mines and the humid air can easily cause metal parts to rust, further weakening the stability of bolted connections.

[0005] High wear requirements: When crushing ore, the surface of the liner plate is subjected to strong impact and friction. The wear-resistant layer of traditional liners has a limited life and needs to be replaced frequently. Loose bolts will aggravate the displacement of the liner plate, resulting in uneven wear or even equipment failure.

[0006] The existing installation structure of wear-resistant liners has the following shortcomings:

[0007] 1. Insufficient bolt anti-loosening design: Traditional liner mounting holes rely solely on the bolt's own thread fit or simple anti-loosening washers, which cannot withstand continuous downhole vibration for a long time. The bolts are prone to falling off, causing the liner to loosen or even fall off, affecting crushing efficiency and posing safety hazards.

[0008] 2. Limited durability of wear-resistant layer: Conventional wear-resistant coatings are prone to peeling off under high impact conditions, and the stress concentration at the contact point between the liner and the bolts exacerbates wear, creating weak points.

[0009] 3. Lack of anti-clogging function: During the crushing process, ore particles are prone to accumulate in the gaps of the liner or around the installation holes, causing equipment blockage, requiring shutdown for cleaning, and reducing production efficiency.

[0010] Therefore, how to design a wear-resistant liner that combines anti-clogging function and long-term anti-loosening structure to adapt to the harsh working environment in coal mines has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0011] To address the shortcomings of existing technologies, this utility model provides an anti-clogging jaw crusher for underground coal mines and its wear-resistant liner structure.

[0012] To achieve the above objectives, the technical solution of this utility model is as follows:

[0013] A coal mine anti-clogging jaw crusher and its wear-resistant liner structure, including the liner body coated with a wear-resistant layer;

[0014] Mounting holes are vertically opened at the smooth part of the top corner of the liner body;

[0015] A receiving cavity is formed on the inner wall of the mounting hole, and the receiving cavity is formed radially along the mounting hole;

[0016] Multiple parallel rotating rods are rotatably connected to the inside of the receiving cavity near the bolt mounting side along the vertical plane of the liner body. An elastic element is installed inside the receiving cavity to press the free end of the rotating rod into the mounting hole.

[0017] A tapered column is fixed at the free end of the rotating rod along its length.

[0018] in:

[0019] When the bolt is installed into the mounting hole, the insertion end of the bolt presses against the rotating rod inside the mounting hole until the rotating rod is completely pressed into the receiving cavity.

[0020] Once the bolts are installed, the tip of one of the tapered pins abuts against the threaded groove of the bolt, preventing the bolt from disengaging from the mounting hole.

[0021] Preferably, the distance between two adjacent rotating rods is between 1cm and 2cm.

[0022] Preferably, a connecting rod is installed on the rotating rod, and an end plate is fixedly installed at the end of the connecting rod away from the rotating rod. One end of the elastic element is fixed to the end plate, and the other end of the elastic element is fixed to the inner wall of the receiving cavity.

[0023] Preferably, a connecting rod is installed on the rotating rod, and an end plate is fixedly installed at the end of the connecting rod away from the rotating rod. One end of the elastic element is fixed to the end plate, and the other end of the elastic element is fixed to the inner wall of the receiving cavity.

[0024] Preferably, when the bolts are not installed, the horizontal length of the rotating rod extending out of the receiving cavity is between 2cm and 3cm.

[0025] The anti-clogging jaw crusher for underground coal mines includes the wear-resistant liner structure described above.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] This invention combines a rotating rod, a tapered column, and an elastic strip. After the bolt is installed, the tip of the tapered column abuts against the threaded groove of the bolt, preventing the bolt from coming out of the mounting hole and thus avoiding loosening of the liner body. Attached Figure Description

[0028] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0029] Figure 1 This is a schematic diagram of the structure of the wear-resistant liner of this utility model when it is fitted with bolts;

[0030] Figure 2 This is a cross-sectional view of the present invention;

[0031] Figure 3 This utility model Figure 2 Enlarged view of section A.

[0032] The diagram shows the following labels: 1. Liner body; 2. Mounting hole; 3. Receiving cavity; 4. Rotating rod; 5. Conical column; 6. Connecting rod; 7. End plate; 8. Elastic strip. Detailed Implementation

[0033] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0034] Example

[0035] like Figure 1-3 As shown, the anti-clogging jaw crusher in coal mines and its wear-resistant liner structure include a liner body 1, which is coated with a wear-resistant layer.

[0036] Mounting hole 2 is vertically opened at the smooth part of the top corner of the liner body 1;

[0037] The receiving cavity 3 is formed on the inner wall of the mounting hole 2, and the receiving cavity 3 is formed radially along the mounting hole 2;

[0038] Multiple parallel rotating rods 4 are rotatably connected to the inside of the receiving cavity 3 near the bolt mounting side along the vertical plane of the liner body 1. The receiving cavity 3 is equipped with an elastic element that presses the free end of the rotating rod 4 into the mounting hole 2.

[0039] The conical column 5 is fixed to the free end of the rotating rod 4 along the length of the rotating rod 4;

[0040] in:

[0041] When the bolt is installed into the mounting hole 2, the insertion end of the bolt presses against the rotating rod 4 inside the mounting hole 2 until the rotating rod 4 is completely pressed into the receiving cavity 3.

[0042] After the bolts are installed, the tip of one of the tapered pins 5 abuts against the threaded groove of the bolt, preventing the bolt from disengaging from the mounting hole 2.

[0043] The problem with the existing technology is that when the bolts are installed into the mounting holes 2 on the liner body 1, the bolts will loosen from the inside of the mounting holes 2 due to the vibration of the bolts caused by external forces over a long period of time, resulting in gaps between the liner body 1 and a decrease in its protective effect.

[0044] This utility model, through the combined use of rotating rod 4, tapered column 5 and elastic strip 8, enables the tip of tapered column 5 to abut against the thread groove of bolt after bolt installation, restricting bolt from detaching from the inside of mounting hole 2, thereby preventing the liner body 1 from loosening.

[0045] The distance between two adjacent rotating rods 4 is between 1cm and 2cm;

[0046] By setting the distance between two adjacent rotating rods 4 relatively close, the vibration amplitude of the mounting hole 2 can be reduced when the bolt is disengaged from the inside of the mounting hole 2, thus limiting the outward movement of the bolt as much as possible;

[0047] A connecting rod 6 is installed on the rotating rod 4. An end plate 7 is fixedly installed on the end of the connecting rod 6 away from the rotating rod 4. One end of the elastic element is fixed on the end plate 7, and the other end of the elastic element is fixed on the inner wall of the receiving cavity 3.

[0048] By setting the elastic strip 8, the free end of the rotating rod 4 can always be outside the receiving cavity 3 when the bolt is not installed, and the tip of the tapered column 5 can be pressed against the thread groove of the bolt after the bolt is installed, thus limiting the displacement of the bolt.

[0049] The elastic element is specifically an elastic strip 8, and the elastic strip 8 is arc-shaped.

[0050] When the bolts are not installed, the horizontal length of the rotating rod 4 extending out of the receiving cavity 3 is between 2cm and 3cm.

[0051] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A wear-resistant liner structure, characterized in that: Includes a liner body (1) on which a wear-resistant layer is coated; Mounting holes (2) are vertically opened at the smooth part of the top corner of the liner body (1); The receiving cavity (3) is opened on the inner wall of the mounting hole (2), and the receiving cavity (3) is opened radially along the mounting hole (2); Multiple parallel rotating rods (4) are rotatably connected to the inside of the receiving cavity (3) near the bolt mounting side along the vertical plane of the liner body (1). The receiving cavity (3) is equipped with an elastic element that presses the free end of the rotating rod (4) into the mounting hole (2). A conical column (5) is fixed at the free end of the rotating rod (4) along the length of the rotating rod (4); in: When the bolt is installed into the mounting hole (2), the insertion end of the bolt presses against the rotating rod (4) inside the mounting hole (2) until the rotating rod (4) is completely pressed into the receiving cavity (3); After the bolt is installed, the tip of one of the tapered pins (5) abuts against the threaded groove of the bolt, preventing the bolt from disengaging from the mounting hole (2).

2. The wear-resistant liner structure according to claim 1, characterized in that: The distance between two adjacent rotating rods (4) is between 1cm and 2cm.

3. The wear-resistant liner structure according to claim 2, characterized in that: A connecting rod (6) is installed on the rotating rod (4). An end plate (7) is fixedly installed on one end of the connecting rod (6) away from the rotating rod (4). One end of the elastic element is fixed on the end plate (7), and the other end of the elastic element is fixed on the inner wall of the receiving cavity (3).

4. The wear-resistant liner structure according to claim 3, characterized in that: The elastic element is specifically an elastic strip (8), and the elastic strip (8) is arc-shaped.

5. The wear-resistant liner structure according to claim 4, characterized in that: When the bolts are not installed, the horizontal length of the rotating rod (4) extending out of the receiving cavity (3) is between 2cm and 3cm.

6. A coal mine underground anti-blocking jaw crusher, characterized in that: Includes the wear-resistant liner structure as described in any one of claims 1-5.

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