An edge protection device with alarm function in underground cave construction

Abstract

The present invention discloses an edge protection device with an alarm function in the construction of an underground cavern, which relates to the technical field of protection devices, and comprises two bases, the bases are trapezoidal structures with a small upper part and a large lower part, the two bases are arranged on the left and right, the top walls of the two bases are provided with slots, a mounting frame is movably installed between the two bases, the two ends of the mounting frame are respectively inserted into the inside of the two slots, a plurality of cross bars are fixedly installed at equal intervals inside the mounting frame, a cross plate is fixedly installed between the two bases, a protection mechanism is arranged on the mounting frame, and the protection mechanism comprises a movable plate, a movable shaft, a sensor, an alarm, a positioning magnetic block, a connecting plate, a folding protection plate, a torsion spring shaft and a bottom connecting plate. The present invention can protect equipment or personnel by being provided with a protection mechanism, and can also protect smaller objects, so as to prevent smaller objects from falling into the interior of the cavern, and can reduce the impact when impacted.

Description

Technical Field

[0001] The invention relates to the technical field of protective devices, and in particular to an edge protective device with an alarm function in underground cavern construction. Background Art

[0002] In underground cave construction, it is often necessary to provide edge protection for the edges of the cave to ensure that the construction can proceed normally and orderly, while also ensuring the safety of personnel and equipment.

[0003] After searching a Chinese patent with publication number CN109057380A, a combined edge protection device is disclosed, including a vertical bar frame, an inclined slat, a base and a vertical bar. The vertical bar frame, the inclined slat and the base are arranged from top to bottom, the top of the vertical bar frame is evenly provided with vertical bar placement holes, the bottom of the vertical bar frame is evenly provided with vertical bar placement grooves corresponding to the vertical bar placement holes, the vertical bar is sleeved in the vertical bar placement hole, and the bottom end of the vertical bar is placed in the vertical bar placement groove.

[0004] However, the above invention has the following disadvantages:

[0005] Although existing edge protection devices can protect personnel and equipment, they are generally protected by fence-like structures. There are large gaps in the fences, which can easily cause smaller objects to pass through the gaps and cause them to fall. At the same time, the device is prone to instability when impacted, which can cause the device and equipment personnel to fall together. Summary of the invention

[0006] The purpose of the present invention is to provide an edge protection device with an alarm function in the construction of an underground cavern, so as to solve the problems raised in the above-mentioned background technology.

[0007] The technical solution of the present invention is: an edge protection device with an alarm function in the construction of an underground cavern, comprising two bases, the bases are trapezoidal structures with a small upper part and a large lower part, the two bases are arranged on the left and right, the top walls of the two bases are provided with slots, a mounting frame is movably installed between the two bases, the two ends of the mounting frame are respectively inserted into the inside of the two slots, a plurality of cross bars are fixedly installed at equal intervals inside the mounting frame, a cross plate is fixedly installed between the two bases, and a protection mechanism is arranged on the mounting frame;

[0008] The protection mechanism includes a movable plate, a movable shaft, a sensor, an alarm, a positioning magnetic block, a connecting plate, a folding protective plate, a torsion spring shaft and a bottom connecting plate. The movable plate is arranged inside the mounting frame, the movable shaft is movably installed inside the lower part of the mounting frame, the movable plate is fixedly sleeved on the movable shaft, a card slot is provided on the top of the mounting frame, the top of the movable plate is located inside the card slot, the sensor is inlaid and installed in the middle position inside the card slot, the alarm is fixedly installed on the top of the mounting frame, the sensor and the alarm are electrically connected, there are two connecting plates, the two connecting plates are respectively arranged on both sides of the movable plate, both sides of the side wall of the mounting frame are provided with storage slots, there are two folding protective plates, the two folding protective plates are respectively movably installed inside the two storage slots, and the two folding protective plates are respectively connected to the two connecting plates, the torsion spring shaft is movably installed on one side of the horizontal plate, the bottom connecting plate is fixedly sleeved on the torsion spring shaft, a trigger mechanism is provided between the horizontal plate and the torsion spring shaft, and a supporting mechanism is provided on the movable plate;

[0009] The trigger mechanism includes a movable block, a limit block and a push block. The top wall of the movable block is an inclined surface. The limit block is fixedly installed on the side wall of the movable block. A limit groove is provided inside the bottom connecting plate at a position corresponding to the limit block. The limit groove is an "L"-shaped structure adapted to the limit block. The limit block is located inside the limit groove. The bottom of the push block is an arc surface. The push block is fixedly installed at a position corresponding to the movable block below the side wall of the movable plate.

[0010] Preferably, a rectangular groove is provided at the bottom of the base at a position corresponding to the slot, a mounting screw is movably installed inside the rectangular groove, the top of the mounting screw extends upward to the inside of the slot, and the mounting screw is threadedly connected to the mounting frame.

[0011] Preferably, a plurality of mounting screws are movably mounted on the connecting plate through threads, the mounting screws extend into the interior of the movable plate, and the connecting plate is fixedly mounted on the movable plate through the mounting screws.

[0012] Preferably, the transverse plate is provided with an installation groove, the movable block is movably installed inside the installation groove, a installation spring is installed below the inside of the installation groove, the top of the installation spring is movably connected to the movable block, and the movable block is movably installed inside the installation groove through the installation spring.

[0013] Preferably, there are a plurality of positioning magnets, which are respectively embedded and installed inside the card slot and at corresponding positions on the movable plate. The positioning magnet inside the card slot is close to the pole of the positioning magnet on the movable plate and has an opposite pole, and the top of the movable plate is installed inside the card slot through the positioning magnet.

[0014] Preferably, the supporting mechanism includes two mounting seats, a mounting shaft, a supporting arm, a supporting leg and a supporting spring. The two mounting seats are arranged on the left and right sides of a side wall of the movable plate. The mounting shaft is movably installed inside the mounting seats. The two supporting arms are movably sleeved on the two mounting shafts respectively, and the bottom of the supporting legs is an inclined surface. The two supporting legs are movably installed on the bottom of the two supporting arms respectively, and the supporting spring is movably installed inside the supporting leg, and one end of the supporting spring is connected to the supporting arm.

[0015] Preferably, a connecting mechanism is provided on the base, and the connecting mechanism includes a first connecting block, a second connecting block, a connecting shaft and a fixing pin. Both bases are provided with connecting grooves, and one of the first connecting block or the second connecting block is movably installed inside the connecting groove. Both the first connecting block and the second connecting block are provided with fixing grooves, and a fixing pin is movably installed on the top wall surface of the base at a position corresponding to the fixing groove, and one end of the fixing pin is located inside the fixing groove.

[0016] Preferably, the first connecting block and the second connecting block are mutually locked and movably connected, a connecting shaft is movably installed between the first connecting block and the second connecting block, and the first connecting block and the second connecting block are movably connected via the connecting shaft.

[0017] Preferably, a pulley groove is formed on the bottom wall of the base, a pulley shaft is movably installed inside the pulley groove, a moving wheel is fixedly sleeved on the pulley shaft, and a rubber anti-slip sleeve is sleeved on the moving wheel.

[0018] The present invention provides an edge protection device with an alarm function in underground cavern construction through improvement. Compared with the prior art, it has the following improvements and advantages:

[0019] First, the present invention is provided with a protective mechanism. When equipment or personnel rush toward the edge, the mounting frame and the cross bar can block the equipment or personnel. When the object to be blocked is small and can pass through between the two cross bars, the movable plate will be impacted and then flipped. When the movable plate flips over, the sensor will be triggered, and the alarm will sound an alarm at the same time, achieving the effect of automatic alarm. At the same time, the movable plate is connected to the connecting plate, and the connecting plate flips with the movable plate. At this time, the folding protective plate will be unfolded from the inside of the storage slot, sealing the movable plate and the mounting frame, so that small objects can be limited between the movable plate and the mounting frame to prevent small objects from falling into the cave.

[0020] Secondly, the present invention is provided with a trigger mechanism. When the movable plate flips, the movable plate will flip with the push block, so that the movable block will be squeezed. After being squeezed, the movable block will move downward, and then drive the limit block to move downward. After the limit block moves downward inside the limit groove, the bottom connecting plate will lose the force of being limited by the limit block, so that the bottom connecting plate will flip in the opposite direction of the movable plate under the action of the torsion spring shaft. At this time, the bottom connecting plate will catch the object blocked by the movable plate, further preventing the object from falling.

[0021] Thirdly, the present invention is provided with a supporting mechanism. When the movable plate is flipped over, the supporting arm will rotate on the mounting shaft, so that the bottom of the supporting leg will contact the ground. Then the impact force between the object and the movable plate will be transmitted to the supporting arm, and the supporting arm will squeeze the supporting spring, so that the supporting spring is compressed, thereby reducing the impact force generated by the object on the basis of supporting the mounting shaft.

[0022] Fourthly: the present invention can connect two devices together by providing a connecting mechanism, and the first connecting block and the second connecting block are respectively inserted into the two connecting grooves, and then the fixing pin is inserted into the fixing groove, so that the first connecting block and the second connecting block can be fixed inside the base, so that the two protective devices can be connected together to improve the protection range. At the same time, the first connecting block and the second connecting block are movably connected by a connecting shaft, so that the first connecting block and the second connecting block can rotate with each other, and then the connection angle of the two protective devices can be adjusted, so that edges of different shapes can be protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall front structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall back structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the overall expanded structure of the present invention;

[0027] Figure 4 It is a cross-sectional view of the interior of a part of the structure in the present invention;

[0028] Figure 5 For the present invention Figure 4Enlarged view of point A in the middle;

[0029] Figure 6 It is a schematic diagram of the supporting mechanism structure in the present invention;

[0030] Figure 7 It is a schematic diagram of the connecting mechanism structure in the present invention;

[0031] Figure 8 It is a cross-sectional view of the internal structure of the base in the present invention.

[0032] Reference numerals:

[0033] 1. Base; 11. Slot; 111. Mounting screw; 12. Mounting frame; 13. Crossbar; 14. Cross plate; 2. Protective mechanism; 21. Movable plate; 211. Card slot; 22. Movable shaft; 23. Sensor; 24. Alarm; 25. Positioning magnet; 26. Connecting plate; 261. Mounting screw; 27. Storage slot; 28. Folding protective plate; 29. ​​Torsion spring shaft; 291. Bottom plate; 3. Trigger mechanism; 31. Movable block; 31 1. Mounting slot; 312. Mounting spring; 32. Limit block; 321. Limit slot; 33. Push block; 4. Support mechanism; 41. Mounting seat; 42. Mounting shaft; 43. Support arm; 44. Support leg; 45. Support spring; 5. Connecting mechanism; 51. First connecting block; 52. Second connecting block; 53. Connecting shaft; 54. Connecting slot; 55. Fixed slot; 56. Fixed latch; 6. Pulley slot; 7. Pulley shaft; 71. Moving wheel. DETAILED DESCRIPTION

[0034] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The present invention provides an edge protection device with an alarm function in underground cavern construction through improvement. The technical solution of the present invention is:

[0036] like Figures 1 to 8As shown, an embodiment of the present invention provides an edge protection device with an alarm function in the construction of an underground cavern, comprising two bases 1, the base 1 being a trapezoidal structure with a small upper portion and a large lower portion, the two bases 1 being arranged left and right, the top walls of the two bases 1 being provided with slots 11, the slots 11 being slots of a rectangular structure, a mounting frame 12 being movably installed between the two bases 1, the mounting frame 12 being a "C"-shaped structure with an opening facing downward, the two ends of the mounting frame 12 being respectively inserted into the interior of the two slots 11, a plurality of cross bars 13 being equidistantly fixedly installed inside the mounting frame 12, the cross bars 13 being cylindrical bars, a cross plate 14 being fixedly installed between the two bases 1, the cross plate 14 being a plate of a rectangular structure, and a protection mechanism 2 being arranged on the mounting frame 12;

[0037] Furthermore, the protection mechanism 2 includes a movable plate 21, a movable shaft 22, a sensor 23, an alarm 24 and a positioning magnet 25. The movable plate 21 is a rectangular plate, which is arranged inside the mounting frame 12. The movable shaft 22 is a cylindrical structure, which is movably installed at the lower part of the mounting frame 12. The movable plate 21 is fixedly sleeved on the movable shaft 22. A slot 211 is provided at the top of the mounting frame 12. The slot 211 is a rectangular slot. The top of the movable plate 21 is located inside the slot 211. The sensor 23 is embedded in the middle position of the slot 211. The alarm 24 is fixedly mounted on the top of the mounting frame 12, the sensor 23 and the alarm 24 are electrically connected, there are a plurality of positioning magnetic blocks 25, and the plurality of positioning magnetic blocks 25 are respectively mounted in the inside of the card slot 211 and the corresponding positions on the movable plate 21, the positioning magnetic block 25 in the card slot 211 and the positioning magnetic block 25 on the movable plate 21 are of opposite poles, and the top of the movable plate 21 is mounted in the inside of the card slot 211 through the positioning magnetic block 25. By setting the protection mechanism 2, when equipment or personnel rush to the edge, the mounting frame 12 and the cross bar 13 can block the equipment or personnel;

[0038] Furthermore, the protective mechanism 2 also includes a connecting plate 26, a folding protective plate 28, a torsion spring shaft 29 and a bottom connecting plate 291. The connecting plate 26 is a rectangular structure plate. There are two connecting plates 26. The two connecting plates 26 are respectively arranged on both sides of the movable plate 21. A plurality of mounting screws 261 are movably installed on the connecting plate 26 through threads. The mounting screws 261 extend to the inside of the movable plate 21. The connecting plate 26 is fixedly installed on the movable plate 21 by the mounting screws 261. Receiving grooves 27 are provided on both sides of the side walls of the mounting frame 12. The receiving grooves 27 are rectangular structure grooves. There are two folding protective plates 28. The folding protective plate 28 is a foldable structure. The two folding protective plates 28 are movably installed in the inside of the two receiving grooves 27, and the two folding protective plates 28 are respectively connected to the two connecting plates 26. The torsion spring shaft 29 is a cylindrical structure. The torsion spring shaft 29 is movably installed At the lower side of the transverse plate 14, the torsion spring shaft 29 is the torsion spring shaft 29, and the bottom connecting plate 291 is a rectangular structure plate, and the bottom connecting plate 291 is fixedly sleeved on the torsion spring shaft 29. A trigger mechanism 3 is arranged between the transverse plate 14 and the torsion spring shaft 29, and a supporting mechanism 4 is arranged on the movable plate 21. When the object to be blocked is small and can pass through between the two cross bars 13, the movable plate 21 will be impacted and then flipped. When the movable plate 21 flips over, the sensor 23 will be triggered. At this time, the alarm 24 will sound an alarm at the same time, which has the effect of automatic alarm. At the same time, the movable plate 21 is connected to the connecting plate 26, and the connecting plate 26 flips with the movable plate 21. At this time, the folding protective plate 28 will be unfolded from the inside of the storage slot 27 to seal the movable plate 21 and the mounting frame 12, so that small objects can be limited between the movable plate 21 and the mounting frame 12 to prevent small objects from falling into the cave.

[0039] Furthermore, the trigger mechanism 3 includes a movable block 31, a limit block 32 and a push block 33. The movable block 31 is a rectangular structure, and the top wall of the movable block 31 is an inclined surface. A mounting groove 311 is provided on the cross plate 14, and the mounting groove 311 is a groove of a rectangular structure. The movable block 31 is movably installed in the interior of the mounting groove 311, and a mounting spring 312 is installed at the lower part of the interior of the mounting groove 311. The top of the mounting spring 312 is movably connected to the movable block 31, and the movable block 31 is movably installed in the interior of the mounting groove 311 by the mounting spring 312, so that after the top of the movable block 31 is squeezed, the movable block 31 will move toward the inside of the mounting groove 311, and the limit block 32 is a block of "L" shaped structure. The limit block 32 is fixedly installed on the side wall of the movable block 31, and a limit groove 321 is provided in the interior of the bottom connecting plate 291 corresponding to the position of the limit block 32, and the limit groove 321 is The "L"-shaped structure adapted to the limit block 32, the limit block 32 is located inside the limit groove 321, the push block 33 is a rectangular structure, the bottom of the push block 33 is an arc surface, and the push block 33 is fixedly installed at the position of the movable block 31 below the side wall of the movable plate 21. Through the setting of the trigger mechanism 3, when the movable plate 21 flips, the movable plate 21 will flip with the push block 33, so that the movable block 31 will be squeezed, and the movable block 31 will move downward after being squeezed, thereby driving the limit block 32 to move downward. After the limit block 32 moves downward in the limit groove 321, the bottom connecting plate 291 will lose the force of being limited by the limit block 32, so that the bottom connecting plate 291 will flip in the opposite direction of the movable plate 21 under the action of the torsion spring shaft 29. At this time, the bottom connecting plate 291 will catch the object blocked by the movable plate 21, further preventing the object from falling.

[0040] Furthermore, a rectangular groove is opened at the bottom of the base 1 at a position corresponding to the slot 11, and a mounting screw 111 is movably installed inside the rectangular groove. The mounting screw 111 is a cylindrical structure with a thread. The top of the mounting screw 111 extends upward to the inside of the slot 11, and the mounting screw 111 is threadedly connected to the mounting frame 12. Through the setting of the mounting screw 111, when the mounting frame 12 is installed in the inside of the slot 11, the mounting screw 111 can be rotated so that the top thread of the mounting screw 111 moves to the inside of the mounting frame 12, so that the mounting frame 12 can be moved to the inside of the slot 11, so that the mounting frame 12 can be fixed and disassembly is convenient.

[0041] Further, the support mechanism 4 includes two mounting seats 41, a mounting shaft 42, a support arm 43, a support leg 44 and a support spring 45. The mounting seat 41 is a hollow structure. The two mounting seats 41 are arranged on the side wall of the movable plate 21. The mounting shaft 42 is a cylindrical structure. The mounting shaft 42 is movably mounted inside the mounting seat 41. The two support arms 43 are movably sleeved on the two mounting shafts 42 respectively. The support leg 44 is a hollow structure, and the bottom of the support leg 44 is an inclined surface. The two support legs 44 are movably mounted on the bottom of the two support arms 43 respectively. The support spring 45 is movably installed inside the support leg 44, and one end of the support spring 45 is connected to the support arm 43. Through the setting of the support mechanism 4, when the movable plate 21 is flipped, the support arm 43 will rotate on the installation shaft 42, so that the bottom of the support leg 44 contacts the ground, and then the impact force between the object and the movable plate 21 will be transmitted to the support arm 43, and the support arm 43 will squeeze the support spring 45, so that the support spring 45 is compressed, thereby reducing the impact force generated by the object on the basis of supporting the installation shaft 42.

[0042] Furthermore, a connecting mechanism 5 is provided on the base 1, and the connecting mechanism 5 includes a first connecting block 51, a second connecting block 52, a connecting shaft 53 and a fixing pin 56. The first connecting block 51 and the second connecting block 52 are both rectangular structures, and the first connecting block 51 and the second connecting block 52 are mutually locked and movably connected. The connecting shaft 53 is a cylindrical structure, and the connecting shaft 53 is movably installed between the first connecting block 51 and the second connecting block 52. The first connecting block 51 and the second connecting block 52 are movably connected through the connecting shaft 53, so that the first connecting block 51 and the second connecting block 52 can rotate with each other. A connecting groove 54 is provided on the side wall of the two bases 1 away from each other. The connecting groove 54 is a groove of a rectangular structure. One of the first connecting block 51 or the second connecting block 52 is movably installed inside the connecting groove 54. A fixing groove 55 is provided, and the fixing groove 55 is a groove of a cylindrical structure. A fixing pin 56 is movably installed on the top wall surface of the base 1 at a position corresponding to the fixing groove 55. One end of the fixing pin 56 is located inside the fixing groove 55. Through the setting of the connecting mechanism 5, the two devices can be connected together. The first connecting block 51 and the second connecting block 52 are respectively inserted into the two connecting grooves 54, and then the fixing pin 56 is inserted into the fixing groove 55, so that the first connecting block 51 and the second connecting block 52 can be fixed inside the base 1, so that the two protective devices can be connected together to increase the protection range. At the same time, the first connecting block 51 and the second connecting block 52 are movably connected by a connecting shaft 53, so that the first connecting block 51 and the second connecting block 52 can rotate with each other, and then the connection angle of the two protective devices can be adjusted, so that edges of different shapes can be protected.

[0043] Furthermore, a pulley groove 6 is provided on the bottom wall of the base 1. The pulley groove 6 is a rectangular groove. A pulley shaft 7 is movably installed inside the pulley groove 6. The pulley shaft 7 is a cylindrical structure. A moving wheel 71 is fixedly sleeved on the pulley shaft 7. The moving wheel 71 is a cylindrical structure. A rubber anti-slip sleeve is sleeved on the moving wheel 71. Through the setting of the moving wheel 71, the moving wheel 71 can rotate at the bottom of the base 1, thereby facilitating the movement of the entire device.

[0044] Specific implementation steps:

[0045] Through the setting of the protection mechanism 2, when equipment or personnel rush to the edge, the mounting frame 12 and the cross bar 13 can block the equipment or personnel. When the object to be blocked is small and can pass through between the two cross bars 13, the movable plate 21 will be impacted and then flipped. When the movable plate 21 flips, the sensor 23 will be triggered. At this time, the alarm 24 will sound an alarm at the same time, which has the effect of automatic alarm. At the same time, the movable plate 21 is connected to the connecting plate 26, and the connecting plate 26 flips with the movable plate 21. At this time, the folding protection plate 28 will be unfolded from the inside of the storage slot 27 to seal the space between the movable plate 21 and the mounting frame 12, so that small objects can be limited in the movable plate 21. The movable plate 21 is provided with a trigger mechanism 3, and when the movable plate 21 is turned over, the movable plate 21 will turn over with the push block 33, so that the movable block 31 will be squeezed, and the movable block 31 will move downward after being squeezed, and then drive the limit block 32 to move downward, and after the limit block 32 moves downward in the limit groove 321, the bottom connecting plate 291 will lose the force of being limited by the limit block 32, so that the bottom connecting plate 291 will turn over in the opposite direction of the movable plate 21 under the action of the torsion spring shaft 29, and at this time, the bottom connecting plate 291 will catch the object blocked by the movable plate 21, further preventing the object from falling.

[0046] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An edge protection device with an alarm function in underground cavern construction, comprising two bases (1), the bases (1) being a trapezoidal structure with a small top and a large bottom, the two bases (1) being arranged on the left and right, characterized in that: The top walls of the two bases (1) are each provided with a slot (11); a mounting frame (12) is movably mounted between the two bases (1); two ends of the mounting frame (12) are respectively inserted into the inside of the two slots (11); a plurality of cross bars (13) are fixedly mounted at equal intervals inside the mounting frame (12); a cross plate (14) is fixedly mounted between the two bases (1); and a protective mechanism (2) is arranged on the mounting frame (12); The protection mechanism (2) comprises a movable plate (21), a movable shaft (22), a sensor (23), an alarm (24), a positioning magnetic block (25), a connecting plate (26), a folding protection plate (28), a torsion spring shaft (29) and a bottom connecting plate (291). The movable plate (21) is arranged inside the mounting frame (12). The movable shaft (22) is movably mounted inside the lower part of the mounting frame (12). The movable plate (21) is fixedly sleeved on the movable shaft (22). A slot (211) is provided at the top of the mounting frame (12). The top of the movable plate (21) is located inside the slot (211). The sensor (23) is embedded in the middle position of the slot (211). The alarm (24) is fixedly mounted on the top of the mounting frame (12). The sensor (23) and the alarm (24) are electrically connected. There are two connecting plates (26) in total. The two connecting plates (26) are respectively arranged on both sides of the movable plate (21). Both sides of the side wall of the mounting frame (12) are provided with receiving grooves (27). There are two folding protective plates (28) in total. The two folding protective plates (28) are respectively movably installed inside the two receiving grooves (27), and the two folding protective plates (28) are respectively connected to the two connecting plates (26). The torsion spring shaft (29) is movably installed below one side of the horizontal plate (14). The bottom connecting plate (291) is fixedly sleeved on the torsion spring shaft (29). A trigger mechanism (3) is arranged between the horizontal plate (14) and the torsion spring shaft (29). A supporting mechanism (4) is arranged on the movable plate (21).

2. The edge protection device with alarm function in underground cavern construction according to claim 1 is characterized in that: The trigger mechanism (3) comprises a movable block (31), a limit block (32) and a push block (33); the top wall surface of the movable block (31) is an inclined surface; the limit block (32) is fixedly mounted on the side wall of the movable block (31); a limit groove (321) is provided inside the bottom connecting plate (291) at a position corresponding to the limit block (32); the limit groove (321) is an "L"-shaped structure adapted to the limit block (32); the limit block (32) is located inside the limit groove (321); the bottom of the push block (33) is an arc surface; and the push block (33) is fixedly mounted below the side wall of the movable plate (21) at a position corresponding to the movable block (31).

3. The edge protection device with alarm function in underground cavern construction according to claim 1 is characterized in that: A rectangular groove is provided at the bottom of the base (1) at a position corresponding to the slot (11), a mounting screw (111) is movably installed inside the rectangular groove, the top of the mounting screw (111) extends upward to the inside of the slot (11), and the mounting screw (111) is threadedly connected to the mounting frame (12).

4. The edge protection device with alarm function in underground cavern construction according to claim 1 is characterized in that: A plurality of mounting screws (261) are movably mounted on the connecting plate (26) via threads, the mounting screws (261) extend into the interior of the movable plate (21), and the connecting plate (26) is fixedly mounted on the movable plate (21) via the mounting screws (261).

5. The edge protection device with alarm function in underground cavern construction according to claim 2 is characterized in that: The transverse plate (14) is provided with a mounting groove (311), the movable block (31) is movably mounted inside the mounting groove (311), a mounting spring (312) is mounted below the inside of the mounting groove (311), the top of the mounting spring (312) is movably connected to the movable block (31), and the movable block (31) is movably mounted inside the mounting groove (311) via the mounting spring (312).

6. The edge protection device with alarm function in underground cavern construction according to claim 1 is characterized in that: There are a plurality of positioning magnetic blocks (25), which are respectively mounted inside the card slot (211) and at corresponding positions on the movable plate (21). The positioning magnetic block (25) inside the card slot (211) has a pole close to the positioning magnetic block (25) on the movable plate (21) and has an opposite pole. The top of the movable plate (21) is mounted inside the card slot (211) via the positioning magnetic block (25).

7. The edge protection device with alarm function in underground cavern construction according to claim 1 is characterized in that: The support mechanism (4) comprises two mounting seats (41), a mounting shaft (42), a support arm (43), a support leg (44) and a support spring (45). The two mounting seats (41) are arranged on the left and right sides of a wall surface of one side of the movable plate (21). The mounting shaft (42) is movably mounted inside the mounting seats (41). The two support arms (43) are movably sleeved on the two mounting shafts (42) respectively. The bottom of the support leg (44) is an inclined surface. The two support legs (44) are movably mounted on the bottom of the two support arms (43) respectively. The support spring (45) is movably mounted inside the support leg (44). One end of the support spring (45) is connected to the support arm (43).

8. The edge protection device with alarm function in underground cavern construction according to claim 1 is characterized by: The base (1) is provided with a connecting mechanism (5), which comprises a first connecting block (51), a second connecting block (52), a connecting shaft (53) and a fixing pin (56). The two bases (1) are both provided with a connecting groove (54), one of the first connecting block (51) or the second connecting block (52) is movably mounted inside the connecting groove (54), the first connecting block (51) and the second connecting block (52) are both provided with a fixing groove (55), and a fixing pin (56) is movably mounted on the top wall surface of the base (1) at a position corresponding to the fixing groove (55), and one end of the fixing pin (56) is located inside the fixing groove (55).

9. The edge protection device with alarm function in underground cavern construction according to claim 8 is characterized in that: The first connecting block (51) and the second connecting block (52) are mutually engaged and movably connected, the connecting shaft (53) is movably installed between the first connecting block (51) and the second connecting block (52), and the first connecting block (51) and the second connecting block (52) are movably connected via the connecting shaft (53).

10. The edge protection device with alarm function in underground cavern construction according to claim 1 is characterized in that: The bottom wall of the base (1) is provided with a pulley groove (6), a pulley shaft (7) is movably mounted inside the pulley groove (6), a moving wheel (71) is fixedly sleeved on the pulley shaft (7), and a rubber anti-slip sleeve is sleeved on the moving wheel (71).

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