Coal seam thickness prediction device convenient to carry

Abstract

The invention relates to the field of coal seam thickness detection, in particular to a portable coal seam thickness prediction device which comprises a connecting frame, air cylinders, fixing screws, a lifting column, a fixing support, a detection assembly, a driving assembly and the like, the connecting frame is placed on the ground, and the front portion and the rear portion of the connecting frame are detachably connected with the air cylinders through the fixing screws; lifting columns are connected to the telescopic ends of the air cylinders, a fixing support is detachably connected between the upper portions of the lifting columns, a detection assembly is arranged on the left portion of the connecting frame, and a driving assembly is arranged on the fixing support. The detection head extends into the second drill rod and the first drill rod, so that the cable moves along the drill rods, the rolling wheels rotate, then the coal seam thickness is detected through the detection head, the detection head can be directly put into the drill rods to move to detect the coal seam after drilling is completed, operation is easy, and the detection efficiency is improved. The detection head is prevented from being in contact with other coal seams to affect detection, and the accuracy of detection results and use convenience are improved.

Description

Technical Field

[0001] The invention relates to the field of coal seam thickness detection, and in particular to a portable coal seam thickness prediction device. Background Art

[0002] Coal seam refers to the organic-rich strata formed during the geological history period. These strata are mainly formed by the transformation of plant debris after a long period of geological action. Coal seam is the carrier of coal resources. Its thickness, distribution range, quality and other factors directly affect the mining and utilization value of coal. Coal seam thickness refers to the vertical distance between the top plate and the bottom plate of the coal seam. It is one of the important parameters for evaluating the amount of coal seam resources and determining the mining method.

[0003] The existing method of predicting the thickness of a coal seam is usually to connect a drill rod to a drilling rig, then start the drilling rig to allow the drill rod to drill into the coal seam. After the drilling is completed, the drill rod is taken out, and then a detection probe is placed in the borehole, so that the detection probe is moved to a specified position to detect the thickness of the coal seam. The operation is relatively cumbersome. During the movement of the detection probe, the detection probe may come into contact with other coal seams or dust in the borehole, thereby affecting the accuracy of the detection result, making it inconvenient to use.

[0004] Therefore, it is necessary to design a coal seam thickness prediction device that can directly place the detection head into the drill rod to detect the coal seam, which is simple to operate, prevents the detection head from contacting other coal seams and affecting the detection, improves the accuracy of the detection results and the convenience of use, and is easy to take out and recycle the drill rod and drill bit. Summary of the invention

[0005] In order to overcome the shortcomings of the existing prediction of coal seam thickness, which is complicated to operate and inconvenient to use due to the fact that the detection probe may come into contact with other coal seams or dust in the borehole during the movement of the detection probe, thereby affecting the accuracy of the detection result, the present invention provides a coal seam thickness prediction device that can directly place a detection head into a drill rod to detect the coal seam, which is simple to operate and prevents the detection head from contacting other coal seams to affect the detection, thereby improving the accuracy of the detection result and the convenience of use, and is easy to take out and recycle the drill rod and drill bit.

[0006] The technical implementation scheme of the present invention is: a coal seam thickness prediction device that is easy to carry, including a connecting frame, a cylinder, fixing screws, a lifting column, a fixed bracket, a detection component, a driving component, a drilling component, a reaming component, a clamping component and a guide component. The connecting frame is placed on the ground, and the front and rear parts of the connecting frame are detachably connected to the cylinder by fixing screws, the telescopic ends of the cylinder are connected to the lifting columns, and the upper parts of the lifting columns are detachably connected to the fixed brackets, the left part of the connecting frame is provided with a detection component, the fixed bracket is provided with a driving component, the driving component is provided with a drilling component, the drilling component is provided with a reaming component, the inside of the drilling component is provided with a clamping component, and the right upper side of the fixed bracket is provided with a guide component.

[0007] The gear train is connected with the gear wheel by the second end of the gear train, and the gear train is connected with the gear train by the second end of the gear train, and the gear train is connected with the gear train by the second end of the gear train.

[0008] Optionally, the rotating clamping frames are all arc-shaped.

[0009] Optionally, the driving assembly includes a first motor, a flat belt and a rotating fixed frame, the left part of the fixed frame is connected to the first motor, the right part of the fixed frame is rotatably connected to the rotating fixed frame, and a flat belt is wrapped around the rotating fixed frame and the output shaft of the first motor through a pulley.

[0010] Optionally, the drilling assembly includes a first drill rod, a second drill rod, a drill bit, a guide drill blade and a first spring. The first drill rod is threadedly connected to the lower part of the rotating fixed frame, the second drill rod is threadedly connected to the lower part of the first drill rod, the drill bit is clamped at the lower part of the second drill rod, the guide drill blade is slidably connected to the lower part of the drill bit, and a first spring is connected between the guide drill blade and the drill bit.

[0011] Optionally, the reaming assembly includes a movable drill blade, a guide telescopic column and a second spring. The four front, rear, left and right parts of the drill bit are all slidably connected to the movable drill blade. The inner sides of the four front, rear, left and right parts of the drill bit are all connected to the guide telescopic column. The telescopic ends of the guide telescopic column are all connected to the movable drill blade on the same side. The telescopic ends of the guide telescopic column are all connected to the drill bit with a second spring.

[0012] Optionally, the movable drill blades are all T-shaped.

[0013] Optionally, the positioning assembly includes a connecting column, a third spring, a guide positioning column and a fourth spring. The connecting column is slidably connected to the inside of the drill bit, the connecting column is in contact with the guide drill blade, the movable drill blade is in contact with the connecting column, the third spring is connected between the connecting column and the drill bit, and two left and right guide positioning columns are slidably connected to the upper part of the drill head, and the fourth spring is connected between the guide positioning columns and the drill bit.

[0014] Optionally, the upper portion of the connecting column is tapered.

[0015] Optionally, the guide assembly includes a support frame and rollers, the upper right side of the fixed bracket is detachably connected to the support frame, and the upper part of the support frame is rotatably connected to two left and right rollers.

[0016] Beneficial effects of the present invention: 1. The present invention extends the detection head into the second drill rod and the first drill rod, so that the clue moves along the drill rod, causing the roller to rotate, and then the coal seam thickness is detected by the detection head. Therefore, after the drilling is completed, the detection head can be directly placed in the drill rod and moved to detect the coal seam. The operation is simple, and it prevents the detection head from contacting other coal seams and affecting the detection, thereby improving the accuracy of the detection result and the convenience of use.

[0017] 2. The present invention starts the cylinder to move the first drill rod and the second drill rod and engage with the drill bit, then starts the cylinder to operate in reverse, so that the first drill rod and the second drill rod move in reverse, and the drill bit moves in reverse, and then the first drill rod, the second drill rod and the drill bit are taken out, so that the second drill rod can be connected with the drill bit after the detection is completed and taken out, which is convenient for the recycling of the drill rod and the drill bit, and the removal of the drill rod and the drill bit.

[0018] 3. The present invention starts the second motor to operate in reverse, causing the second bevel gear to rotate in the reverse direction, and the second bevel gear and the first bevel gear to mesh with each other, causing the wire wheel to rotate in the reverse direction, thereby retracting the wire, and then driving the detection head to move and disengage from the first drill rod and the second drill rod, so that the wire can be automatically retracted and released, reducing errors caused by human factors and improving detection accuracy and efficiency.

[0019] 4. The present invention removes the fixing screws and bolts by hand, then removes the cylinder, the fixed bracket and the support frame, and then rotates the wire wheel rotation clamping frame to open and remove the wire wheel, so that the drill rod, drill bit, cylinder, fixed bracket, support frame and wire wheel can be disassembled, which is convenient for carrying and convenient for loading, unloading and replacing of the drill rod, drill bit, cylinder, fixed bracket, support frame and wire wheel.

[0020] 5. The present invention makes the first drill rod contact with the second drill rod, and then rotates the first drill rod so that the first drill rod is installed on the second drill rod, so that the first drill rod continues to move and drill into the coal seam, so that multiple drill rods can be spliced, which is convenient for adapting to the use requirements of coal seam thickness detection at different depths and improving the flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural cross-sectional view of the present invention.

[0022] Figure 2 It is a sectional view of the first partial three-dimensional structure of the present invention.

[0023] Figure 3 It is a sectional view of a second partial three-dimensional structure of the present invention.

[0024] Figure 4 It is a sectional view of a third partial three-dimensional structure of the present invention.

[0025] Figure 5 It is a sectional view of a fourth partial three-dimensional structure of the present invention.

[0026] Figure 6 It is a sectional view of a fifth partial three-dimensional structure of the present invention.

[0027] Figure 7 It is a schematic diagram of the first three-dimensional structure of the present invention.

[0028] Figure 8 It is a schematic diagram of the second three-dimensional structure of the present invention.

[0029] Fig. 9 It is a schematic diagram of the third three-dimensional structure of the present invention.

[0030] Fig.10 This is a first three-dimensional structural effect diagram of the present invention.

[0031] Fig.11 This is a first structural effect diagram of the present invention.

[0032] Fig.12 This is a second three-dimensional structural effect diagram of the present invention.

[0033] Fig.13 This is a second structural effect diagram of the present invention.

[0034] Fig.14 This is a third three-dimensional structural effect diagram of the present invention.

[0035] Fig.15 This is a third structural effect diagram of the present invention.

[0036] Fig.16 This is a fourth three-dimensional structure effect diagram of the present invention.

[0037] Fig.17 This is a fourth structural effect diagram of the present invention.

[0038] The numbers in the figure are as follows: 0, ground, 1, connecting frame, 2, cylinder, 3, fixing screw, 4, lifting column, 5, fixing bracket, 6, first motor, 7, flat belt, 8, rotating fixing frame, 9, first drill rod, 10, second drill rod, 11, drill bit, 12, guide drill blade, 13, first spring, 14, movable drill blade, 15, guide telescopic column, 16, second spring, 17, connecting column, 18, third spring, 19, guide positioning column, 20, fourth spring, 21, connecting plate, 22, rotating positioning frame, 23, wire wheel, 24, first bevel gear, 25, second motor, 26, second bevel gear, 27, wire, 28, detection head, 29, support frame, 30, roller. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] A portable coal seam thickness prediction device, such as Figure 1-Figure 17As shown, it includes a connecting frame 1, a cylinder 2, a fixing screw 3, a lifting column 4, a fixing bracket 5, a first motor 6, a flat belt 7, a rotating fixing frame 8, a first drill rod 9, a second drill rod 10, a drill bit 11, a guide drill blade 12, a first spring 13, a movable drill blade 14, a guide telescopic column 15, a second spring 16, a connecting column 17, a third spring 18, a guide clamping column 19, a fourth spring 20, a connecting plate 21, a rotating clamping frame 22, a wire wheel 23, a first bevel gear 24, a second motor 25, a second bevel gear 26, a wire 27, a detection head 28, a support frame 29 and a roller 30. The connecting frame 1 is placed on the ground 0, and the front and rear parts of the connecting frame 1 are detachably connected to the cylinder 2 by fixing screws 3. The cylinder 2 The telescopic ends are connected with lifting columns 4, the upper parts of the lifting columns 4 are detachably connected with fixed brackets 5, the left part of the fixed bracket 5 is connected with a first motor 6, the right part of the fixed bracket 5 is rotatably connected with a rotating fixed bracket 8, a flat belt 7 is wound around the rotating fixed bracket 8 and the output shaft of the first motor 6 through a pulley, the lower part of the rotating fixed bracket 8 is connected with a first drill rod 9 through a thread, the lower part of the first drill rod 9 is connected with a second drill rod 10 through a thread, the lower part of the second drill rod 10 is clamped with a drill bit 11, the lower part of the drill bit 11 is slidably connected with a guide drill blade 12, a first spring 13 is connected between the guide drill blade 12 and the drill bit 11, the front, back, left and right parts of the drill bit 11 are all slidably connected with a movable drill blade 14, the movable drill blade 14 is T-shaped, and the drill bit The inner sides of the four parts of the front, rear, left and right of 11 are all connected with guide telescopic columns 15, and the telescopic ends of the guide telescopic columns 15 are all connected with the mobile drill blade 14 on the same side. The telescopic ends of the guide telescopic columns 15 are all connected with the drill bit 11. A second spring 16 is connected between the drill bit 11, and a connecting column 17 is slidably connected inside the drill bit 11. The connecting column 17 contacts the guide drill blade 12, and the mobile drill blade 14 contacts the connecting column 17. The upper part of the connecting column 17 is conical, and a third spring 18 is connected between the connecting column 17 and the drill bit 11. The upper part of the drill bit 11 is slidably connected with left and right guide clamping columns 19, and the guide clamping columns 19 are all connected with the drill bit 11. A fourth spring 20 is connected between the drill bit 11, and the left part of the connecting frame 1 is connected with front and rear two connecting plates 21, and the left part of the connecting plate 21 is rotatable. A rotating clamping frame 22 is connected, and the connecting plates 21 are fixed to the rotating clamping frame 22 on the same side by bolts. A wire wheel 23 is placed between the connecting plates 21, and the rotating clamping frames 22 are in contact with the wire wheel 23. The rotating clamping frames 22 are all arc-shaped, which is convenient for fitting the shape of the wire wheel 23. A first bevel gear 24 is connected to the rear of the wire wheel 23, and a second motor 25 is connected to the left rear of the connecting frame 1. A second bevel gear 26 is connected to the output shaft of the second motor 25, and the second bevel gear 26 is meshed with the first bevel gear 24. A wire 27 is wound around the wire wheel 23, and a detection head 28 is connected to the tail end of the wire 27. A support frame 29 is detachably connected to the upper right side of the fixed bracket 5, and two left and right rollers 30 are rotatably connected to the upper part of the support frame 29.

[0041] When the thickness of the coal seam needs to be predicted, the device can be used and brought to the place where the thickness of the coal seam needs to be predicted, so that the connecting frame 1 is in contact with the ground 0, and then the cylinder 2 is installed on the connecting frame 1 through the fixing screws 3, and then the fixed bracket 5 is installed on the lifting column 4 through the bolts, and then the support frame 29 is installed on the fixed bracket 5 through the bolts, and then the drill bit 11 is clamped with the second drill rod 10, so that the guide drill blade 12 and the movable drill blade 14 are installed on the second drill rod 10, and the movable drill blade 14 is T-shaped, and then the second drill rod 10 is contacted with the rotating fixed frame 8, and then the second drill rod 10 is rotated, and then the second drill rod 10 is installed on the rotating fixed frame 8, and then the first motor 6 on the fixed bracket 5 is started, and the first motor 6 drives the second drill rod 10 to rotate. The driven pulley rotates, causing the flat belt 7 to rotate, thereby driving the rotating fixed frame 8 to rotate, causing the drill bit 11 and the second drill rod 10 to rotate, and then starting the cylinder 2, driving the lifting column 4 to move through the cylinder 2, thereby driving the fixed support 5, the first motor 6, the flat belt 7 and the rotating fixed frame 8 to move, thereby driving the drill bit 11 and the second drill rod 10 to move and drill into the coal seam. During the movement, the guide drill blade 12 on the drill bit 11 contacts the ground 0 and the coal seam, and the guide drill blade 12 will move, and the first spring 13 is squeezed, causing the guide drill blade 12 to contact the connecting column 17, and the upper part of the connecting column 17 is conical, thereby causing the connecting column 17 to move, and the third spring 18 is squeezed, and under the action of the movement of the connecting column 17, the movable drill blade 14 moves and unfolds, thereby causing The guide telescopic column 15 is contracted, the second spring 16 is stretched, and the guide clamping column 19 is moved and expanded to engage with the second drill rod 10, and the fourth spring 20 is squeezed, and then the hole is expanded and drilled. When the depth does not reach the specified area, the first motor 6 is started to operate in the reverse direction, so that the pulley rotates in the reverse direction, and then the flat belt 7 rotates in the reverse direction, so that the rotating fixed frame 8 rotates in the reverse direction and disengages from the second drill rod 10, and then the cylinder 2 is started to operate in the reverse direction, and the lifting column 4 is driven by the cylinder 2 to move in the reverse direction, and then the fixed bracket 5, the first motor 6, the flat belt 7 and the rotating fixed frame 8 are driven to move in the reverse direction, and then the first drill rod 9 is contacted with the second drill rod 10, and then the first drill rod 9 is rotated so that the first drill rod 9 is installed on the second drill rod 10, and then the cylinder 2 is started. The lifting column 4, the fixed bracket 5, the first motor 6, the flat belt 7 and the rotating fixed frame 8 are moved, so that the rotating fixed frame 8 is in contact with the first drill rod 9. When the rotating fixed frame 8 continues to move, the first motor 6 is started, and the pulley is driven by the first motor 6 to rotate, so that the flat belt 7 is rotated, and then the rotating fixed frame 8 is driven to rotate and connect with the first drill rod 9, so that the first drill rod 9 continues to move and drill into the coal seam, so that multiple drill rods can be spliced, which is convenient for adapting to the use requirements of coal seam thickness detection at different depths and improving the flexibility of use. After drilling to the specified depth, the first motor 6 is turned off, and the cylinder 2 is started to operate in the reverse direction, so that the first drill rod 9 and the second drill rod 10 move in the opposite direction for a section, the guide drill blade 12 is separated from the coal seam, and the first spring 13 rebounds.The guide drill blade 12 moves and resets, the third spring 18 rebounds, the connecting column 17 moves and resets, the second spring 16 rebounds, the guide telescopic column 15 stretches and recovers, the mobile drill blade 14 moves and resets, the fourth spring 20 rebounds, the guide clamping column 19 moves and resets and disengages from the second drill rod 10, and then the rod is extended from the rotating fixed frame 8 into the first drill rod 9 and the second drill rod 10, and then the rod is moved downward so that the rod contacts the drill bit 11, and then the drill bit 11 is disengaged from the second drill rod 10, so that the drill bit 11, the guide drill blade 12, the mobile drill blade 14, the guide telescopic column 15, the connecting column 17 and the guide clamping column 19 fall into the drill hole, and then the bolts fixing the connecting plate 21 and the rotating clamping frame 22 are removed, and then the rotating clamping frame 22 is rotated to open. The rotating clamping frame 22 is arc-shaped, which is convenient for fitting the shape of the wire wheel 23. Then the wire wheel 23 is placed on the connecting plate 21, and then the rotating clamping frame 22 is rotated to close and contact with the wire wheel 23, and then the bolts are installed and tightened, so as to install and fix the wire wheel 23, and then the second motor 25 is started, and the second bevel gear 26 is driven by the second motor 25 to rotate, and the second bevel gear 26 and the first bevel gear 24 are meshed with each other to make the wire wheel 23 rotate, and then the wire 27 is released, and then the wire 27 is bypassed by the roller 30 on the support frame 29, so that the wire 27 passes through the rotating fixing frame 8 and extends into the second drill rod 10, and then drives the detection head 28 to extend into the second drill rod 10 and the first drill rod 9, so that the wire 27 moves along the roller 30, so that After the roller 30 rotates, the detection head 28 moves to the specified position and then the second motor 25 is turned off. Then, the coal seam thickness is detected by the detection head 28, so that the detection head 28 can be directly placed in the drill rod and moved to detect the coal seam after the drilling is completed. The operation is simple, and the detection head 28 is prevented from contacting with other coal seams to affect the detection, thereby improving the accuracy of the detection result and the convenience of use. After the detection is completed, the second motor 25 is started to operate in the reverse direction, so that the second bevel gear 26 rotates in the reverse direction, and the second bevel gear 26 and the first bevel gear 24 mesh with each other, so that the wire wheel 23 rotates in the reverse direction, and then the wire 27 is retracted, thereby driving the detection head 28 to move and disengage from the first drill rod 9 and the second drill rod 10, so that the wire 27 can be automatically retracted and released. , reduce the error caused by human factors, improve the accuracy and efficiency of detection, and then start the cylinder 2, so that the first drill rod 9 and the second drill rod 10 move and engage with the drill bit 11, then start the cylinder 2 to operate in the opposite direction, so that the first drill rod 9 and the second drill rod 10 move in the opposite direction, so that the drill bit 11 moves in the opposite direction, and then the first drill rod 9, the second drill rod 10 and the drill bit 11 are taken out, so that the second drill rod 10 and the drill bit 11 can be docked and taken out after the detection is completed, which is convenient for the recycling of the drill rod and the drill bit 11 and the removal of the drill rod and the drill bit 11. After taking them out, close the cylinder 2, and disengage the first drill rod 9 from the rotating fixed frame 8 by rotating, and then remove the second drill rod 10 and the drill bit 11, and then remove them by manually tightening the fixing screws 3 and the bolts,Then remove the cylinder 2, the fixed bracket 5 and the support frame 29, then turn the wire wheel 23 to rotate the positioning frame 22 to open it, and remove the wire wheel 23, so that the drill rod, drill bit 11, cylinder 2, fixed bracket 5, support frame 29 and wire wheel 23 can be disassembled, which is convenient for carrying, and convenient for loading, unloading and replacing the drill rod, drill bit 11, cylinder 2, fixed bracket 5, support frame 29 and wire wheel 23.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A portable coal seam thickness prediction device, characterized in that: The invention comprises a connecting frame (1), a cylinder (2), a fixing screw (3), a lifting column (4), a fixing bracket (5), a detection component, a driving component, a drilling component, a hole enlarging component, a positioning component and a guide component. The connecting frame (1) is placed on the ground (0). The front and rear parts of the connecting frame (1) are detachably connected to the cylinder (2) through the fixing screws (3). The telescopic ends of the cylinder (2) are connected to the lifting columns (4). The upper parts of the lifting columns (4) are detachably connected to the fixing brackets (5). The left part of the connecting frame (1) is provided with a detection component. The fixing bracket (5) is provided with a driving component. The driving component is provided with a drilling component. The drilling component is provided with a hole enlarging component. The inside of the drilling component is provided with a positioning component. The upper side of the right part of the fixing bracket (5) is provided with a guide component.

2. A portable coal seam thickness prediction device according to claim 1, characterized in that: The detection component comprises a connecting plate (21), a rotating clamping frame (22), a wire wheel (23), a first bevel gear (24), a second motor (25), a second bevel gear (26), a wire (27) and a detection head (28). The left part of the connecting frame (1) is connected with two front and rear connecting plates (21). The left part of the connecting plate (21) is rotatably connected with the rotating clamping frame (22). The connecting plates (21) are fixed with the rotating clamping frame (22) on the same side by bolts. A wire wheel (23) is placed between the connecting plates (21). The rotating clamping frame (22) is in contact with the wire wheel (23). The rear part of the wire wheel (23) is connected with the first bevel gear (24). The left rear part of the connecting frame (1) is connected with the second motor (25). The output shaft of the second motor (25) is connected with the second bevel gear (24). 6), the second bevel gear (26) is meshed with the first bevel gear (24), a thread (27) is wound around the thread wheel (23), and the tail end of the thread (27) is connected to the detection head (28); the bolts fixing the connecting plate (21) and the rotating clamping frame (22) are removed by screwing, and then the rotating clamping frame (22) is rotated to open, and then the thread wheel (23) is placed on the connecting plate (21), and then the rotating clamping frame (22) is rotated to close and contact the thread wheel (23), and then the bolts are installed and tightened, and then the thread wheel (23) is installed and fixed, and then the second motor (25) drives the second bevel gear (26) to rotate, and the second bevel gear (26) and the first bevel gear (24) are meshed with each other, so that the thread wheel (23) rotates, and then the thread (27) is released.

3. A portable coal seam thickness prediction device according to claim 2, characterized in that: The rotating clamping frame (22) is all arc-shaped.

4. A portable coal seam thickness prediction device according to claim 3, characterized in that: The driving assembly comprises a first motor (6), a flat belt (7) and a rotating fixed frame (8); the left part of the fixed frame (5) is connected to the first motor (6); the right part of the fixed frame (5) is rotatably connected to the rotating fixed frame (8); and the flat belt (7) is wound around the rotating fixed frame (8) and the output shaft of the first motor (6) via a pulley.

5. The portable coal seam thickness prediction device according to claim 4 is characterized in that: The drilling assembly comprises a first drill rod (9), a second drill rod (10), a drill bit (11), a guide drill blade (12) and a first spring (13); the first drill rod (9) is threadedly connected to the lower part of the rotating fixed frame (8); the second drill rod (10) is threadedly connected to the lower part of the first drill rod (9); the drill bit (11) is clamped to the lower part of the second drill rod (10); the guide drill blade (12) is slidably connected to the lower part of the drill bit (11); and the first spring (13) is connected between the guide drill blade (12) and the drill bit (11).

6. A portable coal seam thickness prediction device according to claim 5, characterized in that: The hole enlarging assembly comprises a movable drill blade (14), a guide telescopic column (15) and a second spring (16); the four front, rear, left and right parts of the drill bit (11) are all slidably connected with the movable drill blade (14); the inner sides of the four front, rear, left and right parts of the drill bit (11) are all connected with the guide telescopic column (15); the telescopic ends of the guide telescopic column (15) are all connected with the movable drill blade (14) on the same side; and the second spring (16) is connected between the telescopic ends of the guide telescopic column (15) and the drill bit (11).

7. A portable coal seam thickness prediction device according to claim 6, characterized in that: The movable drill blades (14) are all T-shaped.

8. The portable coal seam thickness prediction device according to claim 7, characterized in that: The locking assembly comprises a connecting column (17), a third spring (18), a guide locking column (19) and a fourth spring (20); the connecting column (17) is slidably connected inside the drill bit (11); the connecting column (17) contacts the guide drill blade (12); the movable drill blade (14) contacts the connecting column (17); the third spring (18) is connected between the connecting column (17) and the drill bit (11); the upper part of the drill bit (11) is slidably connected to two left and right guide locking columns (19); and the fourth spring (20) is connected between the guide locking columns (19) and the drill bit (11).

9. The portable coal seam thickness prediction device according to claim 8, characterized in that: The upper part of the connecting column (17) is conical.

10. The portable coal seam thickness prediction device according to claim 9, characterized in that: The guide assembly comprises a support frame (29) and a roller (30); the upper right side of the fixed support (5) is detachably connected to the support frame (29); and the upper part of the support frame (29) is rotatably connected to two left and right rollers (30).

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