Safety protection device for extruded side wall of concrete faced rockfill dam

Abstract

The invention belongs to the technical field of water conservancy projects, and particularly relates to a concrete faced rockfill dam extrusion side wall safety protection device which comprises a protection net, a bottom rod, a vertical rod and a base. A positioning block is slidably mounted in the vertical rod, a first supporting rod is rotatably mounted on the positioning block, and a second supporting rod is slidably mounted at the other end of the first supporting rod; a storage rod is fixedly mounted on the side wall of the vertical rod, a winding rod is rotatably mounted in the storage rod, the outer wall of the winding rod is fixedly connected with the protective net, a placement table is fixedly mounted at the top end of the storage rod, a transmission rod is rotatably mounted in the placement table, the other end of the transmission rod is connected with the winding rod, and a transmission assembly is arranged in the placement table. And a trigger mechanism is arranged between the placement table and the first supporting rod, so that the standing of the person is assisted, instantaneous kinetic energy borne by the protective net can be reduced, and the protective effect on the protective net is improved. The protection device is applied to hydraulic engineering, and the construction quality of the whole hydraulic engineering can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy projects, and in particular relates to a safety protection device for an extruded side wall of a face rockfill dam. Background Art

[0002] In the field of water conservancy projects, panel rockfill dam is a very important infrastructure. It is a modern dam type with a rockfill body as the supporting structure and a concrete panel upstream as the anti-seepage system. Its core structure includes the rockfill dam body, cushion area, transition area and upstream concrete panel. It has significant advantages such as simple construction, strong adaptability and good seismic performance.

[0003] Extruded side walls are a key innovative technology in the construction of panel rockfill dams. They are mainly used for the rapid forming and protection of upstream dam slopes. Through mechanized slipform extrusion, low-strength concrete is poured simultaneously during the layered filling of rockfill materials to form a continuous, flat thin-wall structure. This effectively enhances slope stability, prevents scouring, and provides uniform support for subsequent concrete panels.

[0004] During the construction of panel rockfill dams, installed protective nets are often used to prevent high-altitude falling accidents. However, due to the fixed anchoring at the bottom of the vertical poles, the impact energy cannot be effectively dissipated. Therefore, when the protective nets bear the impact load of falling people or objects, problems such as bending and deformation of the vertical poles, damage to the protective nets, and even failure of the anchor points often occur, seriously affecting the safety protection effect.

[0005] To this end, the present invention provides a safety protection device for the squeezed side wall of a face rockfill dam. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the safety protection device for the squeezed side wall of a face rockfill dam of the present invention comprises a protection net, a bottom bar, a vertical bar and a base; A positioning block is slidably installed inside the vertical pole, a first support rod is rotatably installed on the positioning block, and a second support rod is slidably installed on the other end of the first support rod; A storage rod is fixedly installed on the side wall of the vertical pole, a reeling rod is rotatably installed inside the storage rod, and the outer wall of the reeling rod is fixedly connected to the protective net; A placement platform is fixedly installed on the top of the storage rod, and a transmission rod is rotatably installed inside the placement platform, and the other end of the transmission rod is connected to the winding rod; A transmission assembly is provided inside the placement table to control the rotation of the transmission rod; A trigger mechanism is provided between the placement platform and the first support rod, and is used to drive the transmission assembly through the swing of the vertical rod.

[0008] The transmission assembly includes a rotating drum, a spiral groove and a guide block. The rotating drum is slidably installed inside the placement table. The spiral groove is opened on the inner wall of the rotating drum. The guide block is fixedly installed on the outer wall of the transmission rod. One end of the guide block extends to the inside of the spiral groove.

[0009] The transmission assembly includes a piston rod, a piston cylinder, a transfer tube and a piston. The piston cylinder is fixedly installed inside the first support rod. One end of the piston rod is fixedly connected to the second support rod, and the other end extends to the inside of the piston cylinder. The piston is fixedly installed on the top of the rotating cylinder and slidably installed inside the placement table. The piston cylinder is connected to the inner cavity of the placement table through the transfer tube.

[0010] A first ratchet is fixedly mounted on the top end of the reeling rod, and a first ratchet rod for blocking the first ratchet is elastically mounted inside the placement platform.

[0011] One end of the winding rod extends to the inside of the bottom rod and is fixedly installed with a first gear. A threaded rod is rotatably installed inside the vertical rod. The bottom end of the threaded rod extends to the inside of the bottom rod and is provided with a second gear that meshes with the first gear. The positioning block is slidably installed on the outer wall of the threaded rod.

[0012] A second ratchet is rotatably mounted inside the second gear, a second ratchet rod is elastically mounted inside the second gear, and the second ratchet is fixedly connected to the threaded rod.

[0013] A control rod is elastically installed inside the storage rod, a guide groove is opened on the control rod, a guide rod is fixedly installed inside the first ratchet rod, and a second magnetic rod is fixedly installed on the top of the control rod, and the diameter of the second magnetic rod is smaller than that of the control rod.

[0014] The guide groove consists of an inclined groove and a vertical groove.

[0015] A control ring is slidably mounted on the outer wall of the placement table, and a first magnetic rod for attracting the second magnetic rod is fixedly mounted on the bottom end of the control ring.

[0016] A second magnetic block is fixedly mounted on the outer wall of the rotating drum, and a first magnetic block that attracts the second magnetic block is fixedly mounted on the inner wall of the control ring.

[0017] The beneficial effects of the present invention are as follows: 1. The present invention relates to a safety protection device for the squeezed sidewall of a panel rockfill dam. A protective net is used to catch the tilt caused by a person falling, so that the first and second support rods move closer to each other, causing the piston rod to squeeze the hydraulic oil, which enters the interior of the placement table through a transmission tube and pushes the piston to slide the rotating drum downward. The spiral groove and guide block cooperate to control the rotation of the transmission rod to reel in the protective net. This can not only assist the person to stand up, but also reduce the instantaneous kinetic energy generated by the person falling on the protective net, further improving the protective effect of the protective net and thereby increasing the service life of the protective net.

[0018] 2. The safety protection device for the squeezed side wall of a panel rockfill dam described in the present invention drives the reeling rod to reel in the protection net through the transmission rod. At the same time, the threaded rod rotates through the cooperation of the first gear and the second gear, thereby controlling the positioning block to slide downward inside the vertical pole and controlling the first support rod to slide downward inside the vertical pole. At this time, the first support rod pushes the vertical pole, thereby straightening the tilted vertical pole, and then straightening the posture of the person lying on the protection net, further assisting in standing up. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is a perspective view of the present invention; Figure 2 It is a structural schematic diagram of the bottom bar of the present invention; Figure 3 In the present invention Figure 2 A magnified view of point A in the figure; Figure 4 In the present invention Figure 2 Enlarged view of point B in FIG. Figure 5 It is a structural schematic diagram of the transmission rod in the present invention; Figure 6 is a schematic structural diagram of the first ratchet rod in the present invention; Figure 7 In the present invention Figure 6 Enlarged view of point C in the figure; Figure 8 It is a structural schematic diagram of the second ratchet in the present invention.

[0021] In the figure: 1. bottom rod; 2. base; 3. vertical rod; 4. threaded rod; 5. positioning block; 6. first support rod; 7. second support rod; 8. protective net; 9. storage rod; 10. winding rod; 11. first ratchet; 12. transmission rod; 13. rotating drum; 14. guide block; 15. spiral groove; 16. piston; 17. placing table; 18. transfer tube; 19. control ring; 20. first magnetic block; 21. second magnetic block; 22. piston cylinder; 23. piston rod; 24. first magnetic rod; 25. first ratchet rod; 26. control rod; 27. guide groove; 28. second magnetic rod; 29. guide rod; 30. first gear; 31. second gear; 32. second ratchet; 33. second ratchet rod. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 8As shown, a safety protection device for a face rockfill dam extrusion side wall according to an embodiment of the present invention comprises a protection net 8, a bottom bar 1, a vertical bar 3 and a base 2; There are two vertical poles 3 , which are arranged on both sides of the bottom pole 1 , and the protective net 8 is located between the two vertical poles 3 . A base 2 is rotatably mounted on the bottom ends of the two vertical poles 3 .

[0024] A positioning block 5 is slidably mounted inside the vertical rod 3, a first support rod 6 is rotatably mounted on the positioning block 5, and a second support rod 7 is slidably mounted on the other end of the first support rod 6; An end of the second support rod 7 away from the first support rod 6 is provided with a support base connected to the ground.

[0025] A storage rod 9 is fixedly installed on the side wall of the upright pole 3, and a reeling rod 10 is rotatably installed inside the reeling rod 9. The outer wall of the reeling rod 10 is fixedly connected to the protective net 8; When the reeling rod 10 rotates, the protective net 8 can be reeled in. During the reeling process, the protective net 8 will be deformed. At this time, the protective net 8 will be in a taut state. If someone accidentally falls on the protective net 8, the two sides of the protective net 8 can be reeled in at the same time by rotating the two reeling rods 10. The taut protective net 8 will provide a certain supporting force for the person who falls on the protective net 8, making it easier for him to get up.

[0026] A placement platform 17 is fixedly installed on the top of the storage rod 9, and a transmission rod 12 is rotatably installed inside the placement platform 17. The other end of the transmission rod 12 is connected to the winding rod 10; A transmission assembly is provided inside the placement platform 17 for controlling the rotation of the transmission rod 12; A trigger mechanism is provided between the placement platform 17 and the first support rod 6 , for driving the transmission assembly through the swinging of the upright rod 3 .

[0027] When a person falls onto the protective net 8, under the action of weight, the protective net 8 will drive the upright pole 3 to an inclined state, and the transmission component will be activated by the trigger mechanism, so that the transmission rod 12 drives the winding rod 10 to rotate and reel in the protective net 8. By tightening the protective net 8, the fallen person can be assisted to get up.

[0028] As a preferred embodiment of the present invention, the transmission assembly includes a rotating drum 13, a spiral groove 15 and a guide block 14. The rotating drum 13 is slidably installed inside the placement table 17. The spiral groove 15 is opened on the inner wall of the rotating drum 13. The guide block 14 is fixedly installed on the outer wall of the transmission rod 12, and one end of the guide block 14 extends to the inside of the spiral groove 15.

[0029] When the rotating drum 13 slides downward inside the placement platform 17 , the spiral groove 15 cooperates with the guide block 14 , so that the transmission rod 12 can drive the winding rod 10 to rotate, thereby tightening the protective net 8 .

[0030] As a preferred embodiment of the present invention, the transmission assembly includes a piston rod 23, a piston cylinder 22, a transfer tube 18 and a piston 16. The piston cylinder 22 is fixedly mounted inside the first support rod 6. One end of the piston rod 23 is fixedly connected to the second support rod 7, and the other end extends to the inside of the piston cylinder 22. The piston 16 is fixedly mounted on the top of the rotating cylinder 13 and is slidably mounted inside the placement table 17. The piston cylinder 22 is connected to the inner cavity of the placement table 17 through the transfer tube 18.

[0031] Hydraulic oil is stored inside the piston cylinder 22, and a pressure spring is provided between the first support rod 6 and the second support rod 7. The pressure spring can keep the first support rod 6 and the second support rod 7 in a tendency to separate.

[0032] When someone falls on the protective net 8, the protective net 8 and the upright pole 3 are pushed down and tilted by weight. When the upright pole 3 tilts, the first support rod 6 and the second support rod 7 are brought closer to each other. At the same time, the piston rod 23 also slides inside the piston cylinder 22 and squeezes the hydraulic oil. At this time, the hydraulic oil enters the interior of the placement table 17 through the transmission pipe 18 (one end of the transmission pipe 18 extends to the top of the piston 16). The hydraulic oil entering the placement table 17 will push the piston 16, so that the piston 16 drives the rotating drum 13 to slide downward inside the placement table 17. At the same time, the spiral groove 15 and the guide block 14 can control the rotation of the transmission rod 12. Therefore, the winding rod 10 will reel the protective net 8, which can help people get up while reducing the instantaneous kinetic energy generated by people falling on the protective net 8, which may cause damage to the protective net 8 and the upright pole 3.

[0033] As a preferred embodiment of the present invention, a first ratchet 11 is fixedly mounted on the top of the winding rod 10 , and a first ratchet rod 25 for blocking the first ratchet 11 is elastically mounted inside the placement platform 17 .

[0034] By setting the first ratchet rod 25, the clockwise rotation of the first ratchet 11 can be effectively blocked. When the rotating drum 13 slides downward, the cooperation of the spiral groove 15 and the guide block 14 can control the transmission rod 12 to rotate counterclockwise, and drive the winding rod 10 to rotate counterclockwise through the first ratchet 11. At this time, the first ratchet rod 25 will not block the first ratchet 11, so the winding rod 10 can rewind the protective net 8 counterclockwise.

[0035] The first ratchet rod 25 blocks the clockwise rotation of the first ratchet wheel 11 , thereby preventing the reeling rod 10 from being unwound due to the weight of a person or the force generated by struggling when the reeling rod 10 reels the protective net 8 .

[0036] As a preferred embodiment of the present invention, one end of the winding rod 10 extends to the interior of the bottom rod 1 and is fixedly installed with a first gear 30. A threaded rod 4 is rotatably installed inside the vertical rod 3. The bottom end of the threaded rod 4 extends to the interior of the bottom rod 1 and is provided with a second gear 31 that meshes with the first gear 30. The positioning block 5 is slidably installed on the outer wall of the threaded rod 4.

[0037] When the winding rod 10 rotates counterclockwise, it also drives the first gear 30 to rotate counterclockwise. At this time, the second gear 31 drives the threaded rod 4 to rotate clockwise. At this time, the positioning block 5 slides downward along the outer wall of the threaded rod 4.

[0038] When the vertical pole 3 drives the protective net 8 to tilt, the piston rod 23 pushes the hydraulic oil in the piston cylinder 22 completely into the interior of the placement table 17. While the rotating cylinder 13 slides downward, it cooperates with the spiral groove 15 and the guide block 14 to make the transmission rod 12 drive the winding rod 10 to reel the protective net 8. At the same time, through the cooperation of the first gear 30 and the second gear 31, the threaded rod 4 rotates, controlling the positioning block 5 to slide downward inside the vertical pole 3, and controlling the first support rod 6 to slide downward inside the vertical pole 3. Since the second support rod 7 is fixedly connected to the ground, the downward sliding first support rod 6 will push the vertical pole 3, thereby straightening the tilted vertical pole 3, and then straightening the posture of the person lying on the protective net 8 to assist in standing.

[0039] Compared with the fixed protective net 8, when a person falls, the potential energy generated by the acceleration of gravity can easily damage the protective net 8 and the upright pole 3. The present application buffers this potential energy through the cooperation of the piston rod 22, the piston cylinder 23 and the transmission tube 18 between the first support rod 6 and the second support rod 7, and at the same time transmits this potential energy and rolls up the protective net 8 to make it tight, thereby assisting in standing. At the same time, through the cooperation of the first gear 30 and the second gear 31, the threaded rod 4 is rotated to control the positioning block 5 to slide downward inside the upright pole 3, pushing the upright pole 3, thereby straightening the inclined upright pole 3, and straightening the posture of the person lying on the protective net 8, further assisting in standing.

[0040] As a preferred embodiment of the present invention, a second ratchet 32 is rotatably mounted inside the second gear 31 , a second ratchet rod 33 is elastically mounted inside the second gear 31 , and the second ratchet 32 is fixedly connected to the threaded rod 4 .

[0041] The second ratchet rod 33 is set to block the counterclockwise rotation of the second ratchet wheel 32. Therefore, when the second gear 31 rotates clockwise, the second ratchet rod 33 will rotate clockwise outside the second ratchet wheel 32, and at the same time drive the second ratchet wheel 32 to rotate clockwise, thereby driving the threaded rod 4 to rotate.

[0042] As a preferred embodiment of the present invention, a control rod 26 is elastically installed inside the storage rod 9, a guide groove 27 is provided on the control rod 26, a guide rod 29 is fixedly installed inside the first ratchet rod 25, and a second magnetic rod 28 is fixedly installed on the top of the control rod 26, and the diameter of the second magnetic rod 28 is smaller than the diameter of the control rod 26.

[0043] The guide groove 27 consists of a section of inclined groove and a vertical groove.

[0044] The inclined slot is located near one end of the first ratchet rod 25 .

[0045] A reset spring is provided between the bottom end of the control rod 26 and the inside of the storage rod 9. Through the reset spring, the guide groove 27 on the control rod 26 can always be located below the first ratchet rod 25, and the second magnetic rod 28 is located inside the first ratchet rod 25.

[0046] When the control rod 26 drives the first ratchet rod 25 to slide upward, the guide rod 29 will slide inside the guide groove 27. When the guide rod 29 slides to the inside of the inclined groove, the first ratchet rod 25 will rotate and release the obstruction to the first ratchet 11. When the guide rod 29 slides to the inside of the vertical groove, the first ratchet rod 25 will keep moving away from the first ratchet 11.

[0047] As a preferred embodiment of the present invention, a control ring 19 is slidably mounted on the outer wall of the placement table 17 , and a first magnetic rod 24 for attracting the second magnetic rod 28 is fixedly mounted on the bottom end of the control ring 19 .

[0048] A second magnetic block 21 is fixedly mounted on the outer wall of the rotating drum 13 , and a first magnetic block 20 that attracts the second magnetic block 21 is fixedly mounted on the inner wall of the control ring 19 .

[0049] When the rotating drum 13 slides downward inside the placement table 17, the second magnetic block 21 slides inside the placement table 17, and at the same time drives the first magnetic block 20 to slide downward. At this time, the control ring 19 will drive the first magnetic rod 24 to slide downward until the first magnetic rod 24 is attracted to the second magnetic rod 28 inside the first ratchet rod 25. At this time, the protective net 8 will be rolled up, and then the upright pole 3 will be supported by the first support rod 6 to assist in standing.

[0050] When the person is away from the protective net 8, the top pressure spring releases the potential energy, causing the first support rod 6 to separate from the second support rod 7, and the hydraulic oil in the placement platform 17 will return to the inside of the piston cylinder 22, the rotating cylinder 13 will slide upward, and the second magnetic block 21 will slide inside the placement platform 17, while driving the first magnetic block 20 to slide upward, and the control ring 19 will drive the first magnetic rod 24 to slide upward, and pull the second magnetic rod 28 out of the inside of the first ratchet rod 25 through the first magnetic rod 24, so that the control rod 26 slides upward, and through the cooperation of the guide rod 29 and the guide groove 27, the first ratchet rod 25 maintains the tendency to separate from the first ratchet 11, which can release the restriction on the rotation of the transmission rod 12. When the control ring 19 slides to the top, the return spring will pull the control rod 26 and the second magnetic rod 28 back to their original position, so that the first ratchet rod 25 blocks the first ratchet 11 again, which is convenient for next use.

[0051] Working principle: When the vertical pole 3 drives the protective net 8 to tilt, the piston rod 23 pushes the hydraulic oil in the piston cylinder 22 completely into the interior of the placement table 17. While the rotating cylinder 13 slides downward, it cooperates with the spiral groove 15 and the guide block 14 to make the transmission rod 12 drive the winding rod 10 to reel the protective net 8. At the same time, through the cooperation of the first gear 30 and the second gear 31, the threaded rod 4 rotates, controlling the positioning block 5 to slide downward inside the vertical pole 3, and controlling the first support rod 6 to slide downward inside the vertical pole 3. Since the second support rod 7 is fixedly connected to the ground, the downward sliding first support rod 6 will push the vertical pole 3, thereby straightening the tilted vertical pole 3, and then correcting the posture of the person lying on the protective net 8 to assist in standing. It can effectively relieve the potential energy generated when a person falls, thereby reducing the possibility of damage to the protective net 8. At the same time, it can also quickly correct the posture of the person lying on the protective net 8 to assist in standing.

[0052] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0054] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety protection device for a panel rockfill dam extrusion side wall, comprising a protection net (8), a bottom rod (1), a vertical rod (3) and a base (2); Its characteristics are: A positioning block (5) is slidably mounted inside the vertical rod (3), a first support rod (6) is rotatably mounted on the positioning block (5), and a second support rod (7) is slidably mounted on the other end of the first support rod (6); A storage rod (9) is fixedly mounted on the side wall of the vertical pole (3), a reeling rod (10) is rotatably mounted inside the reeling rod (9), and an outer wall of the reeling rod (10) is fixedly connected to the protective net (8); A placement platform (17) is fixedly mounted on the top of the storage rod (9), a transmission rod (12) is rotatably mounted inside the placement platform (17), and the other end of the transmission rod (12) is connected to the winding rod (10); A transmission assembly is provided inside the placement platform (17) for controlling the rotation of the transmission rod (12); A trigger mechanism is provided between the placement platform (17) and the first support rod (6), and is used to drive the transmission assembly through the swinging of the vertical rod (3).

2. The safety protection device for the squeezed side wall of a face rockfill dam according to claim 1, characterized in that: The transmission assembly includes a rotating drum (13), a spiral groove (15) and a guide block (14), wherein the rotating drum (13) is slidably mounted inside a placement table (17), the spiral groove (15) is opened on the inner wall of the rotating drum (13), and the guide block (14) is fixedly mounted on the outer wall of the transmission rod (12), and one end of the guide block (14) extends into the interior of the spiral groove (15).

3. The safety protection device for the squeezed side wall of a face rockfill dam according to claim 2, characterized in that: The transmission assembly includes a piston rod (23), a piston cylinder (22), a transfer tube (18) and a piston (16), wherein the piston cylinder (22) is fixedly mounted inside the first support rod (6), one end of the piston rod (23) is fixedly connected to the second support rod (7), and the other end extends to the inside of the piston cylinder (22), the piston (16) is fixedly mounted on the top of the rotating cylinder (13) and slidably mounted inside the placement table (17), and the piston cylinder (22) is connected to the inner cavity of the placement table (17) through the transfer tube (18).

4. The safety protection device for the squeezed side wall of a face rockfill dam according to claim 3 is characterized by: A first ratchet (11) is fixedly mounted on the top end of the reeling rod (10), and a first ratchet rod (25) for blocking the first ratchet (11) is elastically mounted inside the placement platform (17).

5. The safety protection device for the squeezed side wall of a face rockfill dam according to claim 4 is characterized by: One end of the winding rod (10) extends to the interior of the bottom rod (1) and is fixedly mounted with a first gear (30); a threaded rod (4) is rotatably mounted inside the vertical rod (3); the bottom end of the threaded rod (4) extends to the interior of the bottom rod (1) and is provided with a second gear (31) that meshes with the first gear (30); and the positioning block (5) is slidably mounted on the outer wall of the threaded rod (4).

6. The safety protection device for the squeezed side wall of a face rockfill dam according to claim 5, characterized in that: A second ratchet (32) is rotatably mounted inside the second gear (31), a second ratchet rod (33) is elastically mounted inside the second gear (31), and the second ratchet (32) is fixedly connected to the threaded rod (4).

7. The safety protection device for the squeezed side wall of a face rockfill dam according to claim 6, characterized in that: A control rod (26) is elastically mounted inside the storage rod (9), a guide groove (27) is provided on the control rod (26), a guide rod (29) is fixedly mounted inside the first ratchet rod (25), a second magnetic rod (28) is fixedly mounted on the top end of the control rod (26), and the diameter of the second magnetic rod (28) is smaller than the diameter of the control rod (26).

8. The safety protection device for the squeezed side wall of a face rockfill dam according to claim 7, characterized in that: The guide groove (27) consists of a section of inclined groove and a vertical groove.

9. The safety protection device for the squeezed side wall of a face rockfill dam according to claim 8, characterized in that: A control ring (19) is slidably mounted on the outer wall of the placement platform (17), and a first magnetic rod (24) for attracting a second magnetic rod (28) is fixedly mounted on the bottom end of the control ring (19).

10. The safety protection device for the squeezed side wall of a face rockfill dam according to claim 9, characterized in that: A second magnetic block (21) is fixedly mounted on the outer wall of the rotating drum (13), and a first magnetic block (20) that attracts the second magnetic block (21) is fixedly mounted on the inner wall of the control ring (19).

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