Multi-section extrusion progressive auger for mining coal-water separator and mining coal-water separator

Abstract

The invention belongs to the technical field of mining coal-water solid-liquid separation, and particularly discloses a multi-section extrusion progressive auger for a mining coal-water separator and the mining coal-water separator, the multi-section extrusion progressive auger comprises an auger shaft, a spiral conveying section and a spiral cutting extrusion section; the spiral conveying section consists of continuous auger blades fixed at the rear end of the auger shaft; each spiral cutting and extruding section is composed of two spiral blades fixed to the two side walls of the auger shaft, the spiral direction of the two spiral blades is the same as that of the auger blade, and the two spiral blades form an X shape in space. Compared with the prior art, the device is simple in structure and convenient to manufacture, coal water firstly enters the auger blade and is conveyed into the spiral cutting and extruding section at the front end, and water in the coal water can be better extruded out through multi-section progressive extrusion; and in the spiral extrusion process, the cutting edge can cut the spirally extruded coal slime residues, so that the large coal slime residues are cut up, and the coal-water separation effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mine coal-water separation, in particular to a multi-stage extrusion progressive auger for a mine coal-water separator and a mine coal-water separator. Background Art

[0002] During the gas drainage process, borehole construction is a very important link. Ground well pre-drainage of coal seam gas, underground cross-measure borehole pre-drainage of coal seam gas, and cross-cut borehole pre-drainage of coal seam gas are common ways to pre-drain coal seam gas.

[0003] As a simple, easy-to-use, and efficient coal seam permeability enhancement method for low-permeability coal seams, the hydraulic punching technology can generate fractures in the coal seam, thereby significantly increasing the permeability of the coal seam and improving the gas drainage effect of low-permeability coal seams. It has been widely promoted and applied in the gas drainage borehole operation of the bottom drainage roadway. When performing the hydraulic punching permeability enhancement operation, a large amount of coal-water mixture is discharged from the borehole. After the coal-water mixture flows into the measuring hopper with a screen, the volume of coal slag in the coal-water mixture is measured by the measuring hopper to provide a design basis for the hydraulic punching borehole operation. However, the coal slag after simple filtration of the coal-water mixture has a high water content, and some coal slag with smaller particle sizes flows out through the screen, resulting in low measurement accuracy of the coal slag volume. Moreover, the coal slag with a high water content cannot be conveyed by the belt conveyor, seriously affecting the cleaning and conveying efficiency of the coal-water discharged by the hydraulic punching.

[0004] Previously, we applied for a coal-water separation device for mine coal slag with the application number 202321599774.1. Although it can also perform coal-water separation, the blades on the auger, i.e., the spiral blade shaft, are divided into three sections. The first section is the section with gradually decreasing pitch; the second section is the composite blade section with inner, outer, positive, and reverse rotation directions; the third section is the conical blade section. However, in the actual use process, the extrusion and dehydration effect is still not good, and it is also prone to blockage. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-stage extrusion progressive auger for a mine coal-water separator and a mine coal-water separator.

[0006] To achieve the above object, the present invention is implemented according to the following technical solutions: The first technical solution provided by the present invention is a multi-stage extrusion progressive auger for a mine coal-water separator, including an auger shaft. A spiral conveying section and several spaced-apart spiral cutting and extrusion sections are arranged on the auger shaft from the rear end to the front end. The spiral conveying section is composed of continuous auger blades fixed to the rear end of the auger shaft. Each of the spiral cutting and extrusion sections is composed of two spiral blades fixed to the two side walls of the auger shaft. The spiral directions of the two spiral blades are the same as that of the auger blades, and the two spiral blades form an "X" shape in space, and each spiral blade is 180 degrees along the circumferential direction of the shaft.

[0007] Further, the pitches of the two spiral blades of each spiral cutting and extrusion section are smaller than the pitch of the auger blades, and the pitches of the two spiral blades of each spiral cutting and extrusion section on the auger shaft gradually decrease from the rear end to the front end.

[0008] Further, cutting edges are provided at both the front and rear ends of the auger blades, and cutting edges are also provided at both ends of each spiral blade. The cutting edge at the front end of the auger blade is 90 degrees different in the spiral direction from the cutting edge at the rear end of one of the spiral blades of the adjacent spiral cutting and extrusion section and has a spacing in the axial direction.

[0009] Further, in two adjacent spiral cutting and extrusion sections, the cutting edge at the rear end of one of the spiral blades of the spiral cutting and extrusion section at the front end is 90 degrees different in the spiral direction from the cutting edge at the front end of one of the spiral blades of the spiral cutting and extrusion section at the rear end and has a spacing in the axial direction. The cutting edge at the rear end of the other spiral blade of the spiral cutting and extrusion section at the front end is 90 degrees different in the spiral direction from the cutting edge at the front end of the other spiral blade of the spiral cutting and extrusion section at the rear end and has a spacing in the axial direction.

[0010] Further, the helix angles of the spiral blades of each spiral cutting and extrusion section are smaller than the helix angle of the auger blades, and the helix angles of the two spiral blades of each spiral cutting and extrusion section on the auger shaft gradually decrease from the rear end to the front end.

[0011] Further, the spacing between two adjacent spiral cutting and extrusion sections is the same.

[0012] The second technical solution provided by the present invention is a mine coal-water separator containing the above multi-stage extrusion progressive auger for a mine coal-water separator.

[0013] Compared with the prior art, the multi-stage extrusion progressive auger structure for the mine coal-water separator of the present invention is simple in structure and convenient to manufacture. The auger blade and the spiral blade can be welded on the auger shaft. Secondly, the coal-water first enters the auger blade and is conveyed to the front-end spiral cutting and extrusion section, and through multi-stage progressive extrusion, the water in the coal-water can be better extruded. Moreover, during the spiral extrusion process, the cutting edge can also cut the coal sludge extruded by the spiral to break up the large pieces of coal sludge, increasing the water permeability and improving the coal-water separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the auger of the present invention.

[0015] Figure 2 It is an axonometric view of the auger of the present invention.

[0016] Figure 3 It is a front view of the auger of the present invention.

[0017] Figure 4 It is a rear view of the auger of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the invention. Embodiment 1

[0019] As Figures 1 - 4 shown, this embodiment exemplarily shows a multi-stage extrusion progressive auger for a mine coal-water separator, which is installed in the mine coal-water separator and includes an auger shaft 1. A spiral conveying section 2 and several spaced-apart spiral cutting and extrusion sections 3 are provided on the auger shaft 1 from the rear end to the front end. As Figure 1 shown, this embodiment is provided with five spaced-apart spiral cutting and extrusion sections, which are respectively denoted as the first spiral cutting and extrusion section 31, the second spiral cutting and extrusion section 32, the third spiral cutting and extrusion section 33, the fourth spiral cutting and extrusion section 34 and the fifth spiral cutting and extrusion section 25. The spiral conveying section 2 is composed of continuous auger blades 21 welded to the rear end of the auger shaft 1. Each spiral cutting and extrusion section is composed of two spiral blades 311 welded to both side walls of the auger shaft 1. The spiral directions of the two spiral blades 311 are the same as that of the auger blade 21, and the two spiral blades 311 form an X shape in space, and each spiral blade 311 is 180 degrees along the circumferential direction of the shaft.

[0020] Further, the pitch between the two spiral blades 311 of each spiral cutting and extruding section 3 is smaller than the pitch of the auger blade 21, and the pitch between the two spiral blades 311 of each spiral cutting and extruding section on the auger shaft 1 gradually decreases from the rear end to the front end. As can be seen from 1, the pitch between the two spiral blades 311 of the first spiral cutting and extruding section 31, the second spiral cutting and extruding section 32, the third spiral cutting and extruding section 33, the fourth spiral cutting and extruding section 34, and the fifth spiral cutting and extruding section 25 gradually decreases.

[0021] As Figure 2 shown, cutting edges 4 are provided at both the front and rear ends of the auger blade 21, and cutting edges 4 are also provided at both ends of each spiral blade 311. The cutting edge 4 at the front end of the auger blade 21 faces the cutting edge 4 at the rear end of one of the spiral blades of its adjacent first spiral cutting and extruding section 31 in the spiral direction.

[0022] During actual use, in order to obtain a better extrusion effect, the distance between two adjacent spiral cutting and extruding sections is the same; among two adjacent spiral cutting and extruding sections, the cutting edge at the rear end of one of the spiral blades of the spiral cutting and extruding section located at the front end faces the cutting edge at the front end of one of the spiral blades of the spiral cutting and extruding section located at the rear end in the spiral direction, and the cutting edge at the rear end of the other spiral blade of the spiral cutting and extruding section located at the front end faces the cutting edge at the front end of the other spiral blade of the spiral cutting and extruding section located at the rear end in the spiral direction. Specifically, as Figure 2As shown in the figure, the rear edge of one spiral blade of the second spiral cutting and extruding section 32 faces the front edge of one spiral blade of the first spiral cutting and extruding section 31 located at the rear in the spiral direction; the rear edge of the other spiral blade of the second spiral cutting and extruding section 32 faces the front edge of the other spiral blade of the first spiral cutting and extruding section 31 located at the rear in the spiral direction; the rear edge of one spiral blade of the third spiral cutting and extruding section 33 faces the front edge of one spiral blade of the second spiral cutting and extruding section 32 located at the rear in the spiral direction; the rear edge of the other spiral blade of the third spiral cutting and extruding section 33 faces the front edge of the other spiral blade of the second spiral cutting and extruding section 32 located at the rear in the spiral direction; the rear edge of one spiral blade of the fourth spiral cutting and extruding section 34 faces the front edge of one spiral blade of the third spiral cutting and extruding section 33 located at the rear in the spiral direction; the rear edge of the other spiral blade of the fourth spiral cutting and extruding section 34 faces the front edge of the other spiral blade of the third spiral cutting and extruding section 33 located at the rear in the spiral direction; the rear edge of one spiral blade of the fifth spiral cutting and extruding section 35 faces the front edge of one spiral blade of the fourth spiral cutting and extruding section 34 located at the rear in the spiral direction; the rear edge of the other spiral blade of the fifth spiral cutting and extruding section 35 faces the front edge of the other spiral blade of the fourth spiral cutting and extruding section 34 located at the rear in the spiral direction.

[0023] As Figure 1 , Figure 2 shown, the helix angle of the spiral blade 311 of each spiral cutting and extruding section is smaller than that of the auger blade 21, and the helix angles of the two spiral blades of each spiral cutting and extruding section on the auger shaft 1 gradually decrease from the rear end to the front end. The purpose of such a design is that in actual use, the multi-stage extrusion progressive auger for the mine coal-water separator in this embodiment needs to be used in cooperation with a matching sieve cage. When the helix angle of the spiral blade 311 is large, the pushing speed of the coal slime along the axial direction is fast; when the helix angle of the spiral blade 311 is small, the pushing speed of the coal slime along the axial direction is slow. During the process of the coal slime being pushed along the axial direction, the coal slime in the gap space between the spiral conveying section and the spiral cutting and extruding section and in the gap space between two spiral cutting and extruding sections will be continuously subjected to extrusion, and the extrusion force becomes greater towards the front end. Then, the water in the coal slime is continuously extruded, and the water flows out continuously through the sieve cage. At the same time, the edges of each spiral blade can also cut the coal slime subjected to spiral extrusion to break up large pieces of coal slime, increasing the water permeability and improving the coal-water separation effect. The moisture content of the coal slime after multi-stage progressive extrusion is lower, and the coal-water solid-liquid separation effect is better. Embodiment 2

[0024] This embodiment exemplarily shows a mine coal-water separator, which contains the multi-stage extrusion progressive auger for the mine coal-water separator described above. During actual use, the auger in a coal-water separation device for mine coal cinder disclosed in the applicant's previously applied invention patent 202321599774.1 can be replaced for use. Of course, during actual use, the sieve cage can be directly set in a cylindrical shape without any diameter-changing treatment.

[0025] It should be noted that the multi-stage extrusion progressive auger for the mine coal-water separator in this embodiment can also be used in any screw extrusion type mine coal-water separator. At the same time, it can also be used in screw extruders for solid-liquid separation of various other materials.

[0026] The technical solution of the present invention is not limited to the restrictions of the above specific embodiments. Any technical deformation made according to the technical solution of the present invention falls within the protection scope of the present invention.

Claims

1. A multi-stage extrusion progressive auger for a coal-water separator for mining, comprising an auger shaft, characterized in that: The auger shaft is provided with a spiral conveying section and a plurality of spiral cutting and extruding sections arranged at intervals from the rear end to the front end; the spiral conveying section is composed of continuous auger blades fixed to the rear end of the auger shaft; each of the spiral cutting and extruding sections is composed of two spiral blades fixed to the two side walls of the auger shaft, the spiral direction of the two spiral blades is the same as that of the auger blades, the two spiral blades form an X shape in space, and each spiral blade is 180 degrees along the circumferential direction of the shaft.

2. The multi-stage extrusion progressive auger for a coal-water separator for mining use according to claim 1, characterized in that: The pitch of the two spiral blades of each spiral cutting and extruding section is smaller than the pitch of the auger blade, and the pitch of the two spiral blades of each spiral cutting and extruding section on the auger shaft gradually decreases from the rear end to the front end.

3. The multi-stage extrusion progressive auger for a coal-water separator for mining use according to claim 1, characterized in that: The front and rear ends of the auger blade are provided with cutting edges, and both ends of each spiral blade are also provided with cutting edges. The cutting edge at the front end of the auger blade is 90 degrees different from the cutting edge at the rear end of one of the spiral blades of the adjacent spiral cutting extrusion section in the spiral direction and is spaced axially.

4. The multi-stage extrusion progressive auger for a coal-water separator for mining use according to claim 3, characterized in that: In two adjacent spiral cutting and extrusion sections, the rear end cutting edge of one of the spiral blades of the spiral cutting and extrusion section located at the front end is 90 degrees different from the front end cutting edge of one of the spiral blades of the spiral cutting and extrusion section located at the rear end in the spiral direction and there is a gap in the axial direction, and the rear end cutting edge of the other spiral blade of the spiral cutting and extrusion section located at the front end is 90 degrees different from the front end cutting edge of the other spiral blade of the spiral cutting and extrusion section located at the rear end in the spiral direction and there is a gap in the axial direction.

5. The multi-stage extrusion progressive auger for a coal-water separator for mining use according to claim 1, characterized in that: The helical angle of the spiral blade of each spiral cutting and extruding section is smaller than the helical angle of the auger blade, and the helical angles of the two spiral blades of each spiral cutting and extruding section on the auger shaft gradually decrease from the rear end to the front end.

6. The multi-stage extrusion progressive auger for a coal-water separator for mining use according to claim 1, characterized in that: The distances between two adjacent spiral cutting and extruding sections are the same.

7. A coal-water separator for mining, comprising the multi-stage extrusion progressive auger for coal-water separator for mining as claimed in any one of claims 1 to 6.

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