Mine hole blasting protection device

Abstract

The invention discloses a mine hole blasting protection device which comprises a machine body, the upper end and the lower end of the front side of the machine body are slotted to install buffer plates, the outer ends of the buffer plates penetrate and extend to the outer side of the machine body, and the mine hole blasting protection device further comprises extrusion rods which are slotted in the upper portion of the machine body, penetrate and are slidably installed, and the outer ends of the extrusion rods penetrate and extend to the outer side of the upper portion of the machine body; and the single-rotation reciprocating screw rods are symmetrically arranged on two sides of the middle part of the rear side of the machine body. According to the mine hole blasting installation protection device, grooves are formed in the two ends of the interior of the rear side of the machine body, single-rotation reciprocating lead screws are rotationally installed, then the top ends of the two single-rotation reciprocating lead screws are connected through a transmission belt, and a movable base connected with the outer sides of the two single-rotation reciprocating lead screws in a threaded and penetrating mode can be driven at the same time to conduct position lifting movement; and at the moment, moving rods connected with the interiors of the two moving seats in a penetrating mode can drive a dust collection disc to conduct up-and-down reciprocating absorption on smoke dust generated by blasting, then the absorbed smoke dust is conveyed into the treatment box through a hose in a sealed mode, and it can be guaranteed that the protection device is stably used for protection in the later period.

Description

Technical Field

[0001] The invention relates to the technical field of mine blasting protection, in particular to a mine blasting protection device. Background Art

[0002] Mine blasting is a technology that uses the energy of explosive explosion to destroy ore and rock to achieve the predetermined purpose. It has high destructive power and energy and is particularly suitable for large-scale ore and rock crushing and mining operations. During the mine blasting process, the shock wave and high-temperature and high-pressure gas generated by the explosion of explosives can effectively crush and throw the ore and rock, and achieve the loosening and separation of the ore and rock. When implementing mine blasting, a series of operating steps need to be followed, including understanding the geological conditions of the blasting area, formulating blasting plans, checking safety conditions, configuring blasting equipment and drugs, conducting on-site inspections and measurements, drilling and wiring, charging and detonating, etc. At the same time, it is also necessary to monitor the ore body after charging to ensure the blasting effect and safety. Mine blasting technology has a wide range of applications. It is mainly used in open-pit mining to strip the overburden and crush the ore and rock to a certain size for subsequent mining and loading operations. According to different blasting needs and scenarios, different blasting methods can be used, such as shallow hole blasting, deep hole blasting and chamber blasting.

[0003] When implementing mine blasting, it is necessary to install protective devices to protect construction workers. The protective devices installed for mine blasting refer to a series of protective equipment installed during mine blasting operations to ensure the safety of operators and reduce the impact of blasting operations on the surrounding environment and facilities. The main purpose of these devices is to block, isolate or reduce the hazards of harmful factors such as shock waves, flying rocks, and toxic gases generated by the explosion during the blasting process.

[0004] In the patent "A rock blasting protection device for mining construction" with publication number CN215761780U, the blasting protection device includes a bottom plate, a dust removal mechanism, a protection mechanism, and a purification mechanism. The dust removal mechanism and the purification mechanism are both installed on the outer wall of the top of the bottom plate, and the protection mechanism is compatible with the dust removal mechanism. The dust removal mechanism includes a support plate welded to one side of the outer wall of the top of the bottom plate, a support groove opened on the outer wall of the top of the support plate, an adjustment groove opened on the inner walls of both sides of the support groove, a threaded rod rotatably installed on the inner wall of the adjustment groove, and a moving block rotatably installed on the outer wall of the threaded rod through a thread. In the utility model, the buffer plate blocks the gravel generated by the blasting to prevent splashing and accidentally injuring the staff at any time, the vacuum pump empties the air inside the support groove, the absorption hole generates suction to absorb the dust, the collection groove collects large particles of impurities in the dust, the filtered air is washed with water in the purification box through the connecting pipe, and the dust generated by the blasting is collected to prevent the dust from being inhaled by the staff and affecting their health.

[0005] In the patent "A blasting safety protection device for mining" with publication number CN117470047A, the protection device includes a first support member and a baffle plate, the baffle plate is connected to multiple first support members, the baffle plate is connected to storage members around, the storage members are slidably connected to multiple baffles, the baffles are provided with inclined surfaces and jacks, an elastic member is connected between the baffles and the storage members, and the storage members are slidably connected to a limiting member. The present invention releases the baffles by manually pulling the limiting member forward, and the elastic member drives the baffles to move outward respectively, so that the baffles and the rock wall in the mine cave are closely attached, reducing the gap between the baffle plate and the mine cave, and preventing gravel from splashing onto the operator through the gap, thereby improving the protection function; In the patent "A mining engineering blasting protection device" with publication number CN220230316U, the protection device includes a room body and a door panel, a door panel is movably hinged between the top and bottom of one side of the room body, columns are fixedly connected between the top and bottom of the four corners of the room body, slide grooves are respectively arranged above the four corners of the inner wall of the room, a sliding sleeve is movably connected inside the slide groove, and a fixed block is welded at the bottom of the slide groove. The blasting protection device is hinged between the top and bottom of one side of the room body, and before the explosion occurs, the door panel of the room body embedded in the inner wall of the mountain is opened, and then the door panel is closed, and the sliding sleeves in the same vertical state as the fixed block are movably installed in the upper slide grooves, while preventing the impact airflow in the channel from harming the human body and the device, the spring plate between the sliding sleeves supported by the spring contacts the top of the room body, solving the problem of poor stability of the protection device.

[0006] However, when the above-mentioned mine blasting protection device is used in conjunction with mine blasting, since the dust removal mechanism is arranged at the bottom of the fuselage and its installation position is fixed, it cannot absorb and process the smoke generated by the blasting above the fuselage, which will cause the smoke and dust to be retained above the mine, thereby affecting the stable protective use of the subsequent protection device. Summary of the invention

[0007] The purpose of the present invention is to provide a mine blasting protection device to solve the technical problem that the dust removal mechanism of the existing protection device is arranged at the bottom of the machine body and the installation position is fixed, which causes the blasting smoke and dust to be retained above the mine, thereby affecting the stable protection use of the subsequent protection device.

[0008] To achieve its purpose, the present invention adopts the following technical solution: A mine blasting protection device comprises a fuselage, wherein the upper and lower ends of the front side of the fuselage are grooved and buffer plates are installed through dampers, the free ends of the buffer plates extend to the outside of the fuselage, and moving wheels are installed at both ends of the bottom of the fuselage; The top of the fuselage is grooved, an extrusion rod is slidably installed in the groove, the outer end of the extrusion rod extends to the outside of the fuselage and is installed with a thorn plate, and the outer side of the thorn plate is opposite to the inner wall of the mine cave; a processing box is installed on the upper rear side of the fuselage; An arc-shaped baffle is installed at the bottom of the rear side of the fuselage, and single-rotation reciprocating screws are symmetrically installed on both sides of the middle part of the rear side of the fuselage through slots, and the outer sides of the two single-rotation reciprocating screws are connected through a moving seat, and the internal slot of the moving seat is penetrated by a moving rod, and the moving rod is located at one end of the inside of the fuselage and a dust suction disc is installed obliquely; a servo motor is provided at the top of any one of the single-rotation reciprocating screws, and the top ends of the two single-rotation reciprocating screws are connected by a transmission belt.

[0009] As a preferred embodiment of the technical solution of the present invention, the moving rod is provided with a first magnetic block on both the upper and lower sides, the upper part of the two single-rotation reciprocating screw rods on the inner side of the fuselage is provided with a second magnetic block that cooperates with the upper first magnetic block, and the lower part of the two single-rotation reciprocating screw rods is provided with a third magnetic block that cooperates with the lower first magnetic block.

[0010] Preferably, positioning rods are installed at both ends of the bottom of the fuselage. The positioning rod is located at one end of the inner side of the fuselage and has a groove through which a limit block is installed, and the limit block extends to the inside of the moving wheel.

[0011] Preferably, a return spring is provided in a groove on the positioning rod, one end of the return spring is located on the inner side of the fuselage and is connected to one end of the pull rod, the other end of the pull rod is connected to one end of the pull rope, and the other end of the pull rope is connected to the limit block through the guide wheel.

[0012] Preferably, both ends of the arc-shaped baffle are slotted and arc blocks are rotatably installed by means of a compression spring, and the arc blocks are located in limiting grooves on both sides of the bottom of the fuselage at one end outside the fuselage.

[0013] Preferably, the arc block is located at one end of the inner side of the fuselage and is grooved with a second torsion spring, a rotating rod is provided inside the second torsion spring, and the rotating rod extends to the outer side of the baffle.

[0014] Preferably, the upper and lower ends of the inner side of the buffer plate are connected to one end of an eight-shaped swing rod through a movable shaft, and the other outer end of the swing rod is connected to a moving block through a movable shaft, and the moving block is slidably installed inside the fuselage through a tension spring.

[0015] Preferably, three transmission gears are rotatably installed inside the fuselage through a first torsion spring, and three rows of racks are arranged on the top of the buffer plate, and the three rows of racks are respectively meshed with the three transmission gears; racks are also arranged on the outside of the extrusion rod, and the outer sides of the three transmission gears are meshed and connected with the extrusion rod through the racks.

[0016] Preferably, an inverted U-shaped protective plate is provided at the front end of the fuselage.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) Single-rotation reciprocating screws are installed in the grooves at both ends of the rear side of the machine body, and the top ends of the two single-rotation reciprocating screws are connected by a transmission belt, which can simultaneously drive the moving seats connected by the threads on the outer sides of the two single-rotation reciprocating screws to move up and down. At this time, the moving rods connected inside the two moving seats will drive the dust suction disc to reciprocate up and down to absorb the smoke generated by the blasting, and then the absorbed smoke is transported to the inside of the treatment box through a hose seal, thereby improving the protection efficiency of the protective device and making it more convenient for the protective device to cooperate with the blasting construction in the later stage; (2) Two second magnetic blocks and two third magnetic blocks are respectively arranged at the upper and lower ends of the rear side of the machine body. When the two single-rotation reciprocating screws drive the two moving seats to rise to the top of the machine body, the magnetic fields of the two second magnetic blocks will drive the two moving rods to move inside the two moving seats according to the principle of magnetic field repulsion. Then, the two moving rods will simultaneously drive the two dust collecting discs to move. Similarly, after the two single-rotation reciprocating screws drive the two moving seats to rise to the top of the machine body, the two third magnetic blocks will drive the two dust collecting discs to shrink and move according to the principle of magnetic field attraction of opposite charges, thereby driving the two dust collecting discs to move back and forth left and right, thereby expanding the smoke and dust absorption range of the two dust collecting discs and improving the safety of the protective device. (3) By providing a positioning rod, when the fuselage is installed in a suitable position, the pull rod is manually pulled to drive the pull rope to pull the limit block through the guide wheel to retract and move. At this time, the moving wheel can be turned over, and then the baffle can be pulled down to make the baffle contact with the ground, preventing the blasting smoke and dust from penetrating to the outside through the gap at the bottom of the fuselage, thereby improving the sealing of the fuselage; (4) The arc blocks are installed by rotating the arc blocks through the extrusion springs at both ends of the inner side of the baffle plate, and then a row of limit grooves are connected to the outer sides of the two arc blocks. When the baffle plate is pulled down, the two extrusion springs will eject the two arc blocks into the two rows of limit grooves in turn through their own elastic force, and then the pulled baffle plate can be slid and limited, so as to avoid the baffle plate from loosening and deviating due to the impact force generated by the explosion in the later stage, thereby improving the protection stability of the protective device; (5) By setting three rows of racks on the outer side of the buffer plate, and then meshing with transmission gears on the outer sides of the three rows of racks, when the buffer plate is subjected to the impact force generated by the blasting and shrinks and moves, the buffer plate will drive the three transmission gears to rotate simultaneously through the three rows of racks. At this time, the two transmission gears will also drive the three extrusion rods to move their positions simultaneously through the three rows of racks. Subsequently, the three extrusion rods will simultaneously drive the three thorn plates to expand and move outward, so that the three thorn plates can pierce the inner wall of the mine at the same time, thereby further positioning and fixing the installation position of the fuselage, and avoiding the phenomenon of the fuselage being dislocated and offset due to the impact force of the blasting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 3 It is a schematic diagram of the partial three-dimensional structure of the positioning rod and the pull rod of the present invention; Figure 4 It is a schematic diagram of the partial main cross-section structure of the fuselage and the extruded rod of the present invention; Figure 5 It is a schematic diagram of a partial side section structure of a fuselage and a buffer plate of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle; Figure 7 It is a schematic diagram of the three-dimensional structure of the fuselage and the protective plate of the present invention; Figure 8 It is a schematic diagram of the rear section structure of the fuselage and the single-rotation reciprocating screw rod of the present invention; Fig. 9 For the present invention Figure 8 The enlarged structural diagram at C in the middle; Fig.10 It is a schematic diagram of the rear cross-sectional structure of the protective plate and the movable seat after the movement of the present invention; Fig.11 It is a partial rear cross-sectional structural diagram of the machine body and the dust collecting disc of the present invention.

[0019] In the figure: 1, fuselage; 2, buffer plate; 3, moving wheel; 4, extrusion rod; 5, thorn plate; 6, positioning rod; 7, pull rod; 8, pull rope; 9, reset spring; 10, limit block; 11, transmission gear; 12, damper; 13, swing rod; 14, moving block; 15, tension spring; 16, rack; 17, first torsion spring; 18, protective plate; 19, arc-shaped baffle; 20, processing box; 21, moving seat; 22, moving rod; 23, dust suction disc; 24, first magnetic block; 25, second magnetic block; 26, third magnetic block; 27, arc block; 28, limit slot; 29, extrusion spring; 30, rotating rod; 31, second torsion spring; 32, single-rotation reciprocating screw. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0021] Example 1 The technical problem that the existing dust removal mechanism cannot reciprocate and absorb the smoke and dust above the fuselage 1 is solved.

[0022] The present embodiment provides a mine blasting protection device, comprising a body 1, wherein grooves are formed at both upper and lower ends of the front side of the body 1, and a buffer plate 2 is installed through a damper 12, and the free end of the buffer plate 2 extends to the outside of the body 1, and moving wheels 3 are installed at both ends of the bottom of the body 1; The top of the fuselage 1 is grooved, and an extrusion rod 4 is slidably installed in the groove. The outer end of the extrusion rod 4 extends to the outside of the fuselage 1 and is installed with a thorn plate 5. The outer side of the thorn plate 5 is opposite to the inner wall of the mine cave; a processing box 20 is installed on the upper rear side of the fuselage 1; An arc-shaped baffle 19 is installed at the bottom of the rear side of the fuselage 1, and single-rotation reciprocating screw rods 32 are symmetrically installed on both sides of the middle part of the rear side of the fuselage 1 through grooves, and the outer sides of the two single-rotation reciprocating screw rods 32 are penetrated and connected with a moving seat 21, and the internal groove of the moving seat 21 is penetrated and installed with a moving rod 22, and the moving rod 22 is located at one end of the interior of the fuselage 1 and a dust suction disc 23 is installed obliquely; a servo motor is provided at the top of any of the single-rotation reciprocating screw rods 32, and the top ends of the two single-rotation reciprocating screw rods 32 are connected by a transmission belt.

[0023] The moving rod 22 is provided with a first magnetic block 24 on both the upper and lower sides, the two single-rotation reciprocating screw rods 32 inside the fuselage 1 are provided with a second magnetic block 25 that cooperates with the upper first magnetic block 24, and the lower part of the two single-rotation reciprocating screw rods 32 is provided with a third magnetic block 26 that cooperates with the lower first magnetic block 24.

[0024] When the mine blasting protection device is working, Figure 1-Figure 11 As shown, the servo motor is started to drive one of the single-rotation reciprocating screws 32 to rotate, and then the transmission belt drives the two single-rotation reciprocating screws 32 to rotate at the same time, and then the moving seat 21 connected by the outer threads of the two single-rotation reciprocating screws 32 will reciprocate and move up and down, and then the two moving seats 21 will simultaneously drive the dust suction discs 23 installed at the inner ends of the two moving rods 22 to reciprocate and move up and down, which can reciprocate and absorb the smoke generated by the blasting in an upper and lower position to prevent the smoke from being retained above the fuselage 1 and affecting the health of the construction workers in the later stage; While the two moving seats 21 are reciprocatingly lifted and lowered, the first magnetic blocks 24 arranged at the outer ends of the two moving rods 22 will correspond to the two second magnetic blocks 25 and the two third magnetic blocks 26 respectively, and then they can be reciprocated and squeezed and contracted according to the principle of like charges repelling and opposite charges attracting in magnetic fields, and then the two moving rods 22 are simultaneously driven to reciprocate left and right inside the two moving seats 21, thereby expanding the dust collection range of the two dust suction discs 23 and improving the dust collection efficiency of the two dust suction discs 23.

[0025] Example 2 On the basis of Example 1, the gap at the bottom of the fuselage 1 is sealed by the baffle 19 before the explosion to prevent the smoke generated by the explosion from penetrating into the inner side of the fuselage 1 through the gap. Specifically disclosed is: Positioning rods 6 are installed at both ends of the bottom of the fuselage 1. The positioning rod 6 is located at one end of the inner side of the fuselage 1 and is slotted and penetrated by a plastic spring to install a limit block 10. The limit block 10 extends to the inside of the moving wheel 3.

[0026] A return spring 9 is provided in a groove on the positioning rod 6. One end of the return spring 9 is located on the inner side of the fuselage 1 and is connected to one end of the pull rod 7. The other end of the pull rod 7 is connected to one end of a pull rope 8. The other end of the pull rope 8 is connected to the limit block 10 through a guide wheel (existing technology, not shown in the figure).

[0027] The arc-shaped baffle 19 has grooves at both ends and is rotatably mounted with an arc block 27 through a compression spring 29 . The arc block 27 is located in a limiting groove 28 on both sides of the bottom of the fuselage 1 at one end outside the fuselage 1 .

[0028] The arc block 27 is located at one end of the inner side of the fuselage 1 and is provided with a second torsion spring 31 . A rotating rod 30 is provided inside the second torsion spring 31 . The rotating rod 30 extends to the outer side of the baffle 19 .

[0029] like Figure 1-Figure 9As shown, after the fuselage 1 is installed in a suitable position, the pull rod 7 is manually pulled to move the position, and the pull rope 8 connected to the outer end of the pull rod 7 will pull the limit block 10 through the guide wheel to retract and move, and then the moving wheel 3 can be flipped and folded, and then the baffle 19 is pulled to lower the position, and then the arc block 27 connected by the squeezing springs 29 at both ends of the baffle 19 will pop out into the two rows of limit grooves 28 in turn, and then the moving baffle 19 can be slidably limited to avoid the baffle 19 from loosening and deviating due to the impact force generated by the explosion, thereby improving the protection stability of the protective device; When the blasting is finished and the protective plate 18 needs to be reset, the rotating rod 30 is manually rotated to drive the arc block 27 to separate from the limit groove 28, and then the baffle 19 can be pulled upward to reset. When it moves to the appropriate position, the two second torsion springs 31 will elastically reset the positions of the two flipped arc blocks 27 through their own elastic force, so that the position of the baffle 19 can be positioned and fixed after reset, which is more practical and more time-saving and labor-saving to operate.

[0030] Example 3 On the basis of Example 2, when the fuselage 1 is subjected to the impact force of blasting, the two thorn plates 5 are driven to pierce the inner wall of the mine hole to avoid the phenomenon that the fuselage 1 is displaced and offset due to the impact force of blasting. Specifically disclosed is: The upper and lower ends of the inner side of the buffer plate 2 are connected to one end of an eight-shaped swing rod 13 through a movable shaft, and the other outer end of the swing rod 13 is connected to a moving block 14 through a movable shaft. The moving block 14 is slidably installed inside the fuselage 1 through a tension spring 15.

[0031] Three transmission gears 11 are rotatably mounted inside the fuselage 1 through a first torsion spring 17. Three rows of racks 16 are provided on the top of the buffer plate 2, and the three rows of racks 16 are respectively meshed with the three transmission gears 11. Racks 16 are also provided on the outside of the extrusion rod 4, and the outsides of the three transmission gears 11 are meshed and connected with the extrusion rod 4 through the racks 16. An inverted U-shaped protective plate 18 is provided at the front end of the fuselage 1.

[0032] like Figure 1-Figure 6 As shown, when the buffer plate 2 shrinks and moves due to the impact force generated by the blasting, the two dampers 12 will provide anti-seismic buffering for the squeezed and shrunk buffer plate 2, thereby improving the overall anti-seismic buffering performance of the fuselage 1. While the buffer plate 2 shrinks and moves, the three rows of racks 16 arranged on its outer side will simultaneously drive the three transmission gears 11 to rotate, and then the three transmission gears 11 will also simultaneously drive the three extrusion rods 4 to squeeze the thorn plate 5 to move to the inner wall of the mine, so that the position of the installed fuselage 1 can be positioned and fixed, avoiding the fuselage 1 from being dislocated and offset due to the impact force of the blasting, thereby completing a series of tasks.

[0033] The process of performing blasting protection in combination with the blasting protection device of the present invention specifically includes the following steps: 1. Installation of explosion-proof facilities, including explosion-proof nets, protective curtains and the explosion protection device of the present invention. These facilities can effectively block flying rocks and fragments generated by explosions, and reduce damage to the surrounding environment and personnel; 2. Shock wave isolation: Use specific barriers or structures to isolate and reduce the spread of explosion shock waves, thereby reducing their impact on personnel and equipment outside the operating area; 3. Ventilation and detoxification: Install an efficient ventilation system to quickly remove the toxic gases and smoke generated after blasting, maintain the air quality in the working area, and prevent poisoning incidents; 4. Personal protection measures: Provide workers with comprehensive personal protective equipment, such as safety helmets, protective clothing, gas masks, etc., to directly resist various possible injuries; 5. Setting of safety distance and isolation zone: Demarcate effective safety distance near the mine, set isolation zone and other protective devices to prevent a large amount of rubble or other objects from appearing during the blasting process and affecting the safety of construction workers and surrounding people; 6. Use scientific instruments for monitoring, conduct a comprehensive examination of the mine caves through advanced scientific instruments and equipment, carefully compare the mountain structure, set up clear signs in accident-prone areas, form an automated plan, and regularly observe nearby slopes to ensure the effectiveness of protective devices; 7. Regular inspection and maintenance: Regularly inspect and maintain all protective devices to ensure that they are in good working condition and can respond to possible explosion accidents at any time.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mine blasting protection device, comprising a body (1), wherein the upper and lower ends of the front side of the body (1) are grooved and a buffer plate (2) is installed through a damper (12), the free end of the buffer plate (2) extends to the outside of the body (1), and moving wheels (3) are installed at both ends of the bottom of the body (1), characterized in that: The top of the machine body (1) is grooved, and an extrusion rod (4) is slidably installed in the groove. The outer end of the extrusion rod (4) extends to the outside of the machine body (1) and is installed with a thorn plate (5), and the outer side of the thorn plate (5) is opposite to the inner wall of the mine cave; a processing box (20) is installed on the upper rear side of the machine body (1); A circular arc-shaped baffle plate (19) is installed at the bottom of the rear side of the machine body (1); single-rotation reciprocating screw rods (32) are symmetrically installed in grooves on both sides of the middle of the rear side of the machine body (1); the outer sides of the two single-rotation reciprocating screw rods (32) are connected through a moving seat (21); the inner groove of the moving seat (21) is connected through a moving rod (22); the moving rod (22) is located inside the machine body (1) and a dust collecting disc (23) is installed obliquely at one end; a servo motor is installed at the top of any of the single-rotation reciprocating screw rods (32); and the top ends of the two single-rotation reciprocating screw rods (32) are connected via a transmission belt.

2. A mine blasting protection device according to claim 1, characterized in that: The moving rod (22) is provided with a first magnetic block (24) on both upper and lower sides; the upper parts of the two single-rotation reciprocating screw rods (32) inside the body (1) are provided with a second magnetic block (25) that matches the upper first magnetic block (24); and the lower parts of the two single-rotation reciprocating screw rods (32) are provided with a third magnetic block (26) that matches the lower first magnetic block (24).

3. A mine blasting protection device according to claim 1, characterized in that: Positioning rods (6) are installed at both ends of the bottom of the body (1); one end of the positioning rod (6) is located on the inner side of the body (1) and has a slot through which a limit block (10) is installed, and a plastic spring passes through the slot; the limit block (10) extends into the interior of the moving wheel (3).

4. A mine blasting protection device according to claim 3, characterized in that: A return spring (9) is provided in a groove on the positioning rod (6). One end of the return spring (9) is located on the inner side of the fuselage (1) and is connected to one end of the pull rod (7). The other end of the pull rod (7) is connected to one end of the pull rope (8). The other end of the pull rope (8) is connected to the limit block (10) via a guide wheel.

5. A mine blasting protection device according to claim 1, characterized in that: Both ends of the arc-shaped baffle (19) are slotted and an arc-shaped block (27) is rotatably mounted via a compression spring (29). The arc-shaped block (27) is located on the outer side of the body (1) and one end thereof is located in a limiting groove (28) on both sides of the bottom of the body (1).

6. A mine blasting protection device according to claim 5, characterized in that: The arc block (27) is located at one end of the inner side of the fuselage (1) and is provided with a second torsion spring (31) in a slot, and a rotating rod (30) is provided inside the second torsion spring (31), and the rotating rod (30) extends to the outside of the baffle (19).

7. A mine blasting protection device according to claim 1, characterized in that: The upper and lower ends of the inner side of the buffer plate (2) are connected to one end of an eight-shaped swing rod (13) via a movable shaft, and the other outer end of the swing rod (13) is connected to a moving block (14) via a movable shaft. The moving block (14) is slidably mounted inside the fuselage (1) via a tension spring (15).

8. A mine blasting protection device according to claim 7, characterized in that: Three transmission gears (11) are rotatably mounted inside the body (1) via a first torsion spring (17); three rows of racks (16) are arranged on the top of the buffer plate (2); the three rows of racks (16) are respectively meshed with the three transmission gears (11); a rack (16) is also arranged on the outside of the extrusion rod (4); the outsides of the three transmission gears (11) are meshed and connected with the extrusion rod (4) via the racks (16).

9. A mine blasting protection device according to any one of claims 1 to 8, characterized in that: An inverted U-shaped protective plate (18) is provided at the front end of the fuselage (1).

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