A kind of explosion-proof printing equipment and safety protection method for underground coal mine

Abstract

The present invention belongs to the technical field of mine explosion-proof and environmental protection, and discloses an underground explosion-proof printing device for a coal mine and a safety protection method thereof, wherein the device comprises an explosion-proof box, a rotatable protective door is arranged on the front side of the explosion-proof box, a slidable base is arranged in the inner cavity of the explosion-proof box, a printer is fixedly installed on the top of the base, a locking assembly is arranged on the left side of the protective door, and the locking assembly comprises a fixing sleeve fixedly connected to the top and bottom of the left end of the front side of the protective door. The present invention closes the front side of the explosion-proof box through the protective door, and squeezes and fixes the protective door through the setting of the locking assembly. During the rotation of the protective door, the base is limited and fixed through the setting of the linkage assembly, and the power of the printer is turned on and off, so as to achieve the purpose of automatic power supply and off, extrusion locking and linkage extrusion limiting, and ensure the safety of the coal mine.

Description

Technical Field

[0001] The invention belongs to the technical field of mine explosion-proof and environmental protection, and in particular relates to an underground coal mine explosion-proof printing device and a safety protection method thereof. Background Art

[0002] Underground mine explosion-proof equipment is a special equipment designed to ensure safe operation in mines with flammable and explosive environments such as gas and coal dust. There are flammable and explosive substances such as gas and coal dust in mines. Once they encounter fire or high temperature, they are very likely to cause explosion accidents, posing a serious threat to the life safety of mine workers and mine facilities.

[0003] Due to the presence of flammable and explosive gases and dust in coal mines, there are great safety risks in using ordinary printing equipment in such an environment. The printing equipment may cause explosions due to electric sparks generated during use, and cannot cope with the harsh environment underground. Therefore, it is necessary to provide an explosion-proof printing equipment and a safety protection method for underground coal mines, which can automatically control power supply and power failure, have a good extrusion locking function and a linkage extrusion limiting effect, so that the power can be cut off at the first time when the printer is exposed, and automatically supply power when it is closed, ensuring safe and reliable operation underground in coal mines, meeting the needs of underground operations for printing equipment, and ensuring the safety of coal mines. Summary of the invention

[0004] The purpose of the present invention is to provide an explosion-proof printing device and a safety protection method for underground coal mines, which can automatically control power supply and power off, have a good extrusion locking function and a linked extrusion limiting effect, so that the power is cut off immediately when the printer is exposed, and the power is automatically supplied when it is closed, ensuring safe and reliable operation in underground coal mines, meeting the needs of underground operations for printing equipment, and solving the above-mentioned technical problems.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: an explosion-proof printing device in a coal mine, the device includes an explosion-proof box, a rotatable protective door is arranged on the front side of the explosion-proof box, a slidable base is arranged in the inner cavity of the explosion-proof box, a printer is fixedly installed on the top of the base, a locking assembly is arranged on the left side of the protective door, the locking assembly includes a fixed sleeve fixedly connected to the top and bottom of the left end of the front side of the protective door, a rotatable rotating column 1 is arranged between the two fixed sleeves, the top and bottom ends of the rotating column 1 are respectively rotatably connected to the inner walls of the two fixed sleeves, the top and bottom of the left side of the explosion-proof box are fixedly connected with fixed connecting pieces, the front end of the fixed connecting piece is rotatably connected with a rotating connecting piece, and the rotating connecting piece The right end of the connecting piece passes through the inner cavity of the fixed sleeve and is fixedly connected with a gear column, the top and bottom of the surface of the rotating column are fixedly connected with gears, the gear column and the gear are meshed, and the surface of the rotating column is sleeved with a turning handle, and a linkage component is arranged on the front side of the bottom of the explosion-proof box, and the linkage component includes a linkage rotating plate located at the bottom of the inner cavity of the explosion-proof box, and the right end of the front side of the linkage rotating plate is provided with a wedge-shaped surface, and the bottom of the rear side of the protective door is provided with a wedge-shaped groove matched with the wedge-shaped surface, and the right side of the top of the linkage rotating plate is fixedly connected to a limiting baffle, and the rear side of the limiting baffle is tightly fitted with the front side of the base, and the left side of the bottom of the linkage rotating plate is fixedly connected with an extrusion plate, and a press switch is fixedly installed on the front side of the bottom of the inner cavity of the explosion-proof box.

[0006] Preferably, a first clamping block is fixedly connected to the front end of the right side of the explosion-proof box, a first clamping sleeve is fixedly connected to the right side of the protective door, the first clamping sleeve is engaged with the surface of the first clamping block, a second clamping block is fixedly connected to the left side of the protective door, and a second clamping sleeve is fixedly connected to the front end of the left side of the explosion-proof box, and the second clamping block is inserted into the inner cavity of the second clamping sleeve.

[0007] Preferably, a rectangular sliding groove adapted to the limiting baffle is provided at the bottom of the base.

[0008] Preferably, both sides of the inner cavity of the explosion-proof box are fixedly connected with sliding sleeves, and both sides of the base are fixedly connected with sliding seats, and the sliding seats are slidably connected to the inner cavity of the sliding sleeves.

[0009] Preferably, a rotating ratchet disc is fixedly connected to the top of the turning handle, and a fixed ratchet disc is fixedly connected to the inner cavity of the fixed sleeve located above the protective door, and the rotating ratchet disc and the fixed ratchet disc are meshed with each other.

[0010] Preferably, a spring is sleeved on the bottom of the handle surface, and the top and bottom ends of the spring are respectively welded to the handle and a fixed sleeve located below the protective door.

[0011] Preferably, a plurality of limit clips are annularly fixedly connected to the surface of the rotating column 1, a plurality of limit clips are annularly opened on the inner wall of the turning handle, and the limit clips are slidably connected to the inner cavity of the limit clips.

[0012] Preferably, a second rotating column is fixedly connected to the bottom of the linkage rotating plate, and the second rotating column is rotatably connected to the explosion-proof box.

[0013] Preferably, a torsion spring is sleeved on the surface of the second rotating column, one end of the torsion spring is welded to the linkage rotating plate, and the other end of the torsion spring is welded to the explosion-proof box.

[0014] Preferably, a rectangular groove is provided on the surface of the wedge-shaped surface, and two rollers are rotatably connected to the inner cavity of the rectangular groove.

[0015] A safety protection method for explosion-proof printing equipment in coal mines, the method is used for explosion-proof printing equipment in coal mines, and the steps of the safety protection method are as follows:

[0016] Step 1: When in use, the user first rotates the protective door. During the rotation of the protective door, the inner wall of the limit baffle contacts the surface of the roller, so that the protective door squeezes the linkage rotating plate through the inner wall of the limit baffle, so that the linkage rotating plate rotates with the rotating column 2 as the rotation center, and then the limit baffle is squeezed on the front side of the base to limit and fix the base. During the rotation of the linkage rotating plate, the pressing switch is squeezed through the squeezing plate, so that the pressing switch is turned on to power the printer. At this time, the torsion spring is compressed until the rear side of the protective door is tightly attached to the front side of the explosion-proof box;

[0017] Step 2: The user then rotates the handle from right to left. During the rotation of the handle, the limit card strip and the limit card slot are used to drive the rotating column 1 to rotate. During the rotation of the rotating column 1, the gear is driven to rotate. Due to the meshing transmission of the gear and the tooth column, the gear rotates to the left on the surface of the tooth column. During the rolling process of the gear to the left, the protective door is driven to slide to the left, so that the first clamping sleeve is clamped on the surface of the first clamping block, and the second clamping block is inserted into the inner cavity of the second clamping sleeve to seal the front side of the explosion-proof box.

[0018] Step 3: When the handle is turned to the left, the handle drives the rotating ratchet disc to rotate at the same time, and the rotating ratchet disc rotates at the bottom of the fixed ratchet disc. Due to the meshing and non-returning effect of the fixed ratchet disc and the rotating ratchet disc and the elastic propulsion effect of the spring on the handle, the rotating ratchet disc cannot rotate to the right, so that the handle will not retreat to the right, so that the protective door is stably engaged with the front side of the explosion-proof box;

[0019] Step 4. When disassembly is required, the user first presses the handle downward so that the handle drives the rotating ratchet disc to disengage from the fixed ratchet disc and compresses the spring at the same time, then rotates the handle to the right to cause the gear to rotate to the right, thereby causing the protective door to slide to the right, and then rotates the protective door forward to open it. When the protective door is out of contact with the explosion-proof box, the wedge-shaped groove releases the squeeze on the linkage rotating plate, and the torsion spring rebounds and drives the linkage rotating plate to rotate. At this time, the extrusion plate releases the squeeze on the push switch, and the printer is powered off. Then the user pulls the base forward, and the base drives the printer out of the inner cavity of the explosion-proof box.

[0020] The beneficial effects of the present invention are as follows: the present invention closes the front side of the explosion-proof box through the protective door, and squeezes and fixes the protective door through the setting of the locking component. During the rotation of the protective door, the base is limited and fixed through the setting of the linkage component, and the power of the printer is turned on and off, which can achieve the purpose of automatic power supply and off, squeeze locking and linkage squeeze limiting, thereby ensuring the safety of the coal mine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or other advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only exemplary and do not limit the present invention, wherein:

[0022] Figure 1 A three-dimensional schematic diagram of an embodiment of the present invention;

[0023] Figure 2 A top view of an explosion-proof box, a printer and a protective door according to an embodiment of the present invention;

[0024] Figure 3 It is a three-dimensional schematic diagram of a protective door and a locking assembly according to an embodiment of the present invention;

[0025] Figure 4 It is a three-dimensional schematic diagram of a locking assembly according to an embodiment of the present invention;

[0026] Figure 5 It is a three-dimensional exploded view of a locking assembly according to an embodiment of the present invention;

[0027] Figure 6 A front cross-sectional view of a locking assembly according to an embodiment of the present invention;

[0028] Figure 7 It is a three-dimensional schematic diagram of an explosion-proof box and a linkage assembly according to an embodiment of the present invention;

[0029] Figure 8 An embodiment of the present invention Figure 7 A partial enlarged view of point A in the middle.

[0030] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0031] 1. Explosion-proof box, 2. Protection door, 3. Base, 4. Printer, 5. Locking assembly, 51. Fixed sleeve, 52. Rotating column one, 53. Fixed connecting piece, 54. Rotating connecting piece, 55. Tooth column, 56. Gear, 57. Turn handle, 6. Linkage assembly, 61. Linkage rotating plate, 62. Wedge surface, 63. Wedge groove, 64. Limit baffle, 65. Extrusion plate, 66. Press switch, 67. Rectangular slide, 7. First clamping block, 8. First clamping sleeve, 9. Second clamping block, 10. Second clamping sleeve, 11. Sliding sleeve, 12. Sliding seat, 13. Rotating ratchet disc, 14. Fixed ratchet disc, 15. Spring, 16. Limiting card strip, 17. Limiting card slot, 18. Rotating column two, 19. Torsion spring, 20. Rectangular groove, 21. Roller. DETAILED DESCRIPTION

[0032] Hereinafter, embodiments of the underground explosion-proof printing device and the safety protection method thereof for coal mines of the present invention will be described with reference to the accompanying drawings.

[0033] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are illustrative and exemplary, and should not be construed as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0034] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the present invention and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of various components of the embodiments of the present invention, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0035] Embodiment 1: Figure 1-8An explosion-proof printing device for underground coal mines according to an embodiment of the present invention is shown, the device comprises an explosion-proof box 1, a rotatable protective door 2 is arranged on the front side of the explosion-proof box 1, a slidable base 3 is arranged in the inner cavity of the explosion-proof box 1, a printer 4 is fixedly installed on the top of the base 3, a locking assembly 5 is arranged on the left side of the protective door 2, the locking assembly 5 comprises a fixed sleeve 51 fixedly connected to the top and bottom of the left end of the front side of the protective door 2, a rotatable rotating column 52 is arranged between the two fixed sleeves 51, the top and bottom ends of the rotating column 52 are rotatably connected to the inner walls of the two fixed sleeves 51 respectively, the top and bottom of the left side of the explosion-proof box 1 are fixedly connected to a fixed connector 53, the front end of the fixed connector 53 is rotatably connected to a rotating connector 54, and the right end of the rotating connector 54 is rotatably connected to the inner wall of the two fixed sleeves 51. A tooth column 55 is fixedly connected to the inner cavity of the fixed sleeve 51, and a gear 56 is fixedly connected to the top and bottom of the surface of the rotating column 52, and the tooth column 55 and the gear 56 are meshed. A turning handle 57 is sleeved on the surface of the rotating column 52, and sliding sleeves 11 are fixedly connected to both sides of the inner cavity of the explosion-proof box 1, and sliding seats 12 are fixedly connected to both sides of the base 3. The sliding seat 12 is slidably connected to the inner cavity of the sliding sleeve 11, and a rotating ratchet disk 13 is fixedly connected to the top of the turning handle 57. A fixed ratchet disk 14 is fixedly connected to the inner cavity of the fixed sleeve 51 located above the protective door 2, and the rotating ratchet disk 13 and the fixed ratchet disk 14 are meshed. A spring 15 is sleeved on the bottom of the surface of the turning handle 57, and the top and bottom ends of the spring 15 are respectively connected to the turning handle 57 and the fixed sleeve located below the protective door 2 51 welding, through the coordinated use of the rotating ratchet disk 13 and the fixed ratchet disk 14, the turning handle 57 has a back-stopping effect, preventing the turning handle 57 from rotating under natural conditions, thereby improving the connection tightness between the explosion-proof box 1 and the protective door 2. At the same time, under the elastic force of the spring 15, the rotating ratchet disk 13 can actively engage with the fixed ratchet disk 14 upward, thereby producing a back-stopping effect on the turning handle 57. The surface of the rotating column 52 is annularly fixedly connected with a plurality of limiting card strips 16, and the inner wall of the turning handle 57 is annularly provided with a plurality of limiting card grooves 17. The limiting card strips 16 are slidably connected to the inner cavity of the limiting card grooves 17. Through the coordinated use of the limiting card grooves 17 and the limiting card strips 16, the turning handle 57 can simultaneously drive the rotating column during the rotation process. 1, and the gear 52 and the gear 56 rotate, and the handle 57 can slide up and down on the surface of the rotating column 52, so as to realize the engagement and disengagement of the rotating ratchet disc 13 and the fixed ratchet disc 14. A linkage component 6 is arranged on the front side of the bottom of the explosion-proof box 1, and the linkage component 6 includes a linkage rotating plate 61 located at the bottom of the inner cavity of the explosion-proof box 1, and a wedge-shaped surface 62 is arranged on the right end of the front side of the linkage rotating plate 61, and a rectangular groove 20 is provided on the surface of the wedge-shaped surface 62, and two rollers 21 are rotatably connected to the inner cavity of the rectangular groove 20, and a wedge-shaped groove 63 adapted to the wedge-shaped surface 62 is provided at the bottom of the rear side of the protective door 2, and a limited baffle 64 is fixedly connected to the right side of the top of the linkage rotating plate 61, and a rectangular slide groove 67 adapted to the limited baffle 64 is provided at the bottom of the base 3.The rear side of the limit baffle 64 is closely fitted with the front side of the base 3, the left side of the bottom of the linkage rotating plate 61 is fixedly connected with an extrusion plate 65, and the front side of the bottom of the inner cavity of the explosion-proof box 1 is fixedly installed with a press switch 66;

[0036] A safety protection method for explosion-proof printing equipment in coal mines, the method is used for explosion-proof printing equipment in coal mines, and the steps of the safety protection method are as follows:

[0037] Step 1: When in use, the user first rotates the protective door 2. During the rotation of the protective door 2, the inner wall of the limit baffle 64 contacts the surface of the roller 21, so that the protective door 2 squeezes the linkage rotating plate 61 through the inner wall of the limit baffle 64, so that the linkage rotating plate 61 rotates with the rotating column 18 as the rotation center, and then the limit baffle 64 squeezes the front side of the base 3 to limit and fix the base 3. During the rotation of the linkage rotating plate 61, the pressing switch 66 is squeezed through the pressing plate 65, so that the pressing switch 66 is turned on to power the printer 4. At this time, the torsion spring 19 is compressed until the rear side of the protective door 2 is tightly attached to the front side of the explosion-proof box 1;

[0038] Step 2, the user then rotates the handle 57 from right to left. During the rotation process, the handle 57 drives the rotating column 1 52 to rotate through the cooperation of the limit card strip 16 and the limit card slot 17. During the rotation process, the rotating column 1 52 drives the gear 56 to rotate. Due to the meshing transmission effect of the gear 56 and the tooth column 55, the gear 56 rotates to the left on the surface of the tooth column 55. During the rolling process to the left, the gear 56 drives the protective door 2 to slide to the left, so that the first clamping sleeve 8 is clamped on the surface of the first clamping block 7, and the second clamping block 9 is inserted into the inner cavity of the second clamping sleeve 10, so as to seal the front side of the explosion-proof box 1;

[0039] Step 3: When the handle 57 is rotated to the left, the handle 57 drives the rotating ratchet disc 13 to rotate at the same time. The rotating ratchet disc 13 rotates at the bottom of the fixed ratchet disc 14. Due to the meshing and non-returning effect of the fixed ratchet disc 14 and the rotating ratchet disc 13 and the elastic propulsion effect of the spring 15 on the handle 57, the rotating ratchet disc 13 cannot rotate to the right, so that the handle 57 will not retreat to the right, so that the protective door 2 is stably engaged with the front side of the explosion-proof box 1.

[0040] Step 4. When disassembly is required, the user first presses down the handle 57 so that the handle 57 drives the rotating ratchet disk 13 to disengage from the fixed ratchet disk 14 and compresses the spring 15. Then, the handle 57 is rotated to the right so that the gear 56 rotates to the right, thereby causing the protective door 2 to slide to the right. Then, the protective door 2 is rotated forward to open the protective door 2. When the protective door 2 is out of contact with the explosion-proof box 1, the wedge-shaped groove 63 releases the squeeze on the linkage rotating plate 61. At the same time, the torsion spring 19 rebounds and drives the linkage rotating plate 61 to rotate. At this time, the squeezing plate 65 releases the squeeze on the press switch 66, and the printer 4 is powered off. Then, the user pulls the base 3 forward, and the base 3 drives the printer 4 out of the inner cavity of the explosion-proof box 1.

[0041] Embodiment 2: It is basically the same as Embodiment 1, and furthermore: a first clamping block 7 is fixedly connected to the front end of the right side of the explosion-proof box 1, a first clamping sleeve 8 is fixedly connected to the right side of the protective door 2, the first clamping sleeve 8 is clamped on the surface of the first clamping block 7, a second clamping block 9 is fixedly connected to the left side of the protective door 2, and a second clamping sleeve 10 is fixedly connected to the front end of the left side of the explosion-proof box 1, the second clamping block 9 is inserted into the inner cavity of the second clamping sleeve 10. By using the first clamping block 7, the first clamping sleeve 8 and the second clamping block 9 and the second clamping sleeve 10 in coordination, the tightness of the connection between the explosion-proof box 1 and the protective door 2 is strengthened, so that the explosion-proof box 1 and the protective door 2 are tightly connected, and the sealing effect of the explosion-proof box 1 is further improved.

[0042] Embodiment 3: It is basically the same as Embodiment 1, and furthermore: a rotating column 2 18 is fixedly connected to the bottom of the linkage rotating plate 61, and the rotating column 2 18 is rotatably connected to the explosion-proof box 1. A torsion spring 19 is sleeved on the surface of the rotating column 2 18, and one end of the torsion spring 19 is welded to the linkage rotating plate 61, and the other end of the torsion spring 19 is welded to the explosion-proof box 1. Through the coordinated use of the rotating column 2 18 and the torsion spring 19, the linkage rotating plate 61 can actively rotate and reset when it is not squeezed by the protective door 2, so that the squeezing plate 65 can be separated from the squeezing of the press switch 66, so that the press switch 66 can cut off the power to the printer 4 in the first time.

[0043] In summary, the underground explosion-proof printing equipment and safety protection method of the coal mine closes the front side of the explosion-proof box 1 through the protective door 2, and squeezes and fixes the protective door 2 through the setting of the locking component 5. During the rotation of the protective door 2, the base 3 is limited and fixed through the setting of the linkage component 6, and the power of the printer 4 is turned on and off, which can achieve the purpose of automatic power supply and off, extrusion locking and linkage extrusion limit, thereby ensuring the safety of the coal mine.

[0044] The technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. An explosion-proof printing device for underground coal mines, characterized in that: The device comprises an explosion-proof box (1), wherein a rotatable protective door (2) is arranged on the front side of the explosion-proof box (1), a slidable base (3) is arranged in the inner cavity of the explosion-proof box (1), a printer (4) is fixedly installed on the top of the base (3), a locking assembly (5) is arranged on the left side of the protective door (2), the locking assembly (5) comprises a fixing sleeve (51) fixedly connected to the top and bottom of the left end of the front side of the protective door (2), a rotatable rotating column (52) is arranged between the two fixing sleeves (51), the top and bottom ends of the rotating column (52) are rotatably connected to the inner walls of the two fixing sleeves (51) respectively, and the top of the left side of the explosion-proof box (1) is fixedly connected to the top of the fixing sleeve (51) and the bottom of the fixing sleeve (51). The top and bottom of the rotating column (52) are fixedly connected to a fixed connection piece (53), the front end of the fixed connection piece (53) is rotatably connected to a rotating connection piece (54), the right end of the rotating connection piece (54) penetrates into the inner cavity of the fixed sleeve (51) and is fixedly connected to a tooth column (55), the top and bottom of the surface of the rotating column (52) are fixedly connected to a gear (56), the tooth column (55) and the gear (56) are meshed, the surface of the rotating column (52) is sleeved with a turning handle (57), the top of the turning handle (57) is fixedly connected to a rotating ratchet disc (13), the inner cavity of the fixed sleeve (51) located above the protective door (2) is fixedly connected to a fixed ratchet disc (13), and the inner cavity of the fixed sleeve (51) located above the protective door (2) is fixedly connected to a fixed ratchet disc (13). 4), the rotating ratchet disc (13) and the fixed ratchet disc (14) are meshed, the bottom of the surface of the turning handle (57) is sleeved with a spring (15), the top and bottom ends of the spring (15) are respectively welded to the turning handle (57) and the fixed sleeve (51) located below the protective door (2), the front side of the bottom of the explosion-proof box (1) is provided with a linkage assembly (6), the linkage assembly (6) includes a linkage rotating plate (61) located at the bottom of the inner cavity of the explosion-proof box (1), the bottom of the linkage rotating plate (61) is fixedly connected with a rotating column 2 (18), the rotating column 2 (18) is rotatably connected to the explosion-proof box (1), and the surface of the rotating column 2 (18) is sleeved with a torsion spring (19 ), one end of the torsion spring (19) is welded to the linkage rotating plate (61), and the other end of the torsion spring (19) is welded to the explosion-proof box (1); a wedge-shaped surface (62) is provided at the right end of the front side of the linkage rotating plate (61); a wedge-shaped groove (63) adapted to the wedge-shaped surface (62) is provided at the bottom of the rear side of the protection door (2); a limit baffle (64) is fixedly connected to the right side of the top of the linkage rotating plate (61); the rear side of the limit baffle (64) is tightly fitted with the front side of the base (3); an extrusion plate (65) is fixedly connected to the left side of the bottom of the linkage rotating plate (61); and a push switch (66) is fixedly installed on the front side of the bottom of the inner cavity of the explosion-proof box (1).

2. The explosion-proof printing equipment for underground coal mines according to claim 1, characterized in that: A first clamping block (7) is fixedly connected to the front end of the right side of the explosion-proof box (1), a first clamping sleeve (8) is fixedly connected to the right side of the protection door (2), the first clamping sleeve (8) is clamped on the surface of the first clamping block (7), a second clamping block (9) is fixedly connected to the left side of the protection door (2), and a second clamping sleeve (10) is fixedly connected to the front end of the left side of the explosion-proof box (1), the second clamping block (9) is inserted into the inner cavity of the second clamping sleeve (10).

3. The explosion-proof printing equipment for underground coal mines according to claim 2, characterized in that: The bottom of the base (3) is provided with a rectangular sliding groove (67) adapted to the limit baffle (64).

4. The explosion-proof printing equipment for underground coal mines according to claim 3, characterized in that: Slide sleeves (11) are fixedly connected to both sides of the inner cavity of the explosion-proof box (1), and slide seats (12) are fixedly connected to both sides of the base (3), and the slide seats (12) are slidably connected to the inner cavity of the slide sleeves (11).

5. The explosion-proof printing equipment for underground coal mines according to claim 4, characterized in that: The surface of the rotating column 1 (52) is annularly fixedly connected with a plurality of limit clamping strips (16), the inner wall of the rotating handle (57) is annularly provided with a plurality of limit clamping grooves (17), and the limit clamping strips (16) are slidably connected to the inner cavity of the limit clamping grooves (17).

6. The explosion-proof printing equipment for underground coal mines according to claim 5, characterized in that: A rectangular groove (20) is provided on the surface of the wedge-shaped surface (62), and the inner cavity of the rectangular groove (20) is rotatably connected to two rollers (21).

7. A safety protection method for explosion-proof printing equipment in underground coal mines, which is applied to the explosion-proof printing equipment in underground coal mines according to claim 6, characterized in that: The steps of this safety protection method are as follows: Step 1: When in use, the user first rotates the protective door (2). During the rotation of the protective door (2), the inner wall of the wedge-shaped groove (63) contacts the surface of the roller (21), so that the protective door (2) squeezes the linkage rotating plate (61) through the inner wall of the wedge-shaped groove (63), so that the linkage rotating plate (61) rotates with the second rotating column (18) as the rotation center, thereby squeezing the limit baffle (64) on the front side of the base (3) to limit and fix the base (3). During the rotation of the linkage rotating plate (61), the pressing switch (66) is squeezed through the pressing plate (65), so that the pressing switch (66) is turned on to supply power to the printer (4). At this time, the torsion spring (19) is compressed until the rear side of the protective door (2) is tightly attached to the front side of the explosion-proof box (1); Step 2: The user then rotates the handlebar (57) from right to left. During the rotation process, the handlebar (57) drives the rotating column (52) to rotate through the cooperation of the limit clamping strip (16) and the limit clamping groove (17). During the rotation process, the rotating column (52) drives the gear (56) to rotate. Due to the meshing transmission effect of the gear (56) and the tooth column (55), the gear (56) rotates to the left on the surface of the tooth column (55). During the rolling process to the left, the gear (56) drives the protective door (2) to slide to the left, so that the first clamping sleeve (8) is clamped on the surface of the first clamping block (7). At the same time, the second clamping block (9) is inserted into the inner cavity of the second clamping sleeve (10), thereby sealing the front side of the explosion-proof box (1). Step 3: When the handle (57) is rotated to the left, the handle (57) drives the rotating ratchet disc (13) to rotate at the same time. The rotating ratchet disc (13) rotates at the bottom of the fixed ratchet disc (14). Due to the meshing and non-returning effect of the fixed ratchet disc (14) and the rotating ratchet disc (13) and the elastic propulsion effect of the spring (15) on the handle (57), the rotating ratchet disc (13) cannot rotate to the right, so that the handle (57) will not retreat to the right, so that the protective door (2) is stably engaged with the front side of the explosion-proof box (1); Step 4: When disassembly is required, the user first presses the handle (57) downward so that the handle (57) drives the rotating ratchet disc (13) to disengage from the fixed ratchet disc (14) and compresses the spring (15). The user then rotates the handle (57) to the right so that the gear (56) rotates to the right, thereby causing the protective door (2) to slide to the right. The user then rotates the protective door (2) forward so that the protective door (2) opens. When the protective door (2) is out of contact with the explosion-proof box (1), the wedge-shaped groove (63) releases the pressure on the linkage rotating plate (61). At the same time, the torsion spring (19) rebounds and drives the linkage rotating plate (61) to rotate. At this time, the squeezing plate (65) releases the pressure on the push switch (66), and the printer (4) is powered off. The user then pulls the base (3) forward, and the base (3) drives the printer (4) out of the inner cavity of the explosion-proof box (1).

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