A safety protection device for a deep foundation pit of a construction site

Abstract

The application relates to the hoisting protection technical field and discloses a safety protection device for a deep foundation pit of a construction site, which comprises a safety cage, a vertical rod and a protection mechanism. The protection mechanism comprises a fixing frame, a transmission frame and a transverse moving frame. The fixing frame is connected with the safety cage. The transmission frame is arranged between the fixing frame and the transverse moving frame and is slidably arranged on the fixing frame. The transverse moving frame is slidably arranged on the transmission frame. The fixing frame and the transverse moving frame are both provided with clamping pulley mechanisms and locking mechanisms. The fixing frame is provided with an emergency brake mechanism at the bottom. The clamping pulley mechanism enables the protection mechanism to move along the vertical rod. The locking mechanism enables the fixing frame and the transverse moving frame to keep a distance from the vertical rod in the locking state and to brake in cooperation with the emergency brake mechanism. The safety protection device for the deep foundation pit of the construction site can realize the stable lifting of the safety cage along the vertical rod and can also complete the accurate transverse movement between multiple vertical rods through the protection mechanism, so that the operation range is greatly expanded.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hoisting protection, in particular to a safety protection device for deep foundation pit of construction site. BACKGROUND

[0002] In the existing deep foundation pit safety protection process, the deep foundation pit wall needs to be first reinforced, such as pouring concrete wall or supporting with protective steel plate. Construction personnel usually use slopes or hoisting equipment to fall into the deep foundation pit for construction. For deeper deep foundation pits, a safety cage is usually used for personnel and bulk material transportation by winch traction. Some equipment is equipped with a simple vertical rod guide structure to enable the safety cage to fall stably.

[0003] A safety protection device for deep foundation pit (publication number: CN114348925B) disclosed by Chinese patent publication discloses a safety cage with enhanced protection structure and oxygen supply, alarm and observation functions. The device can provide safety protection for workers in the deep foundation pit in case of emergency. However, the device is directly hoisted by a crane and has no other force points, so the device is prone to shaking during the descent process and is prone to collision with the deep foundation pit wall, causing collision injury to the internal workers.

[0004] Periodic inspection of the protection structure of the wall is required during deep foundation pit construction to prevent collapse accidents. However, such equipment cannot complete this work. The safety cage with vertical rod guide lacks a stable horizontal movement structure. If the horizontal position of the safety cage needs to be adjusted, the work often needs to be suspended and external auxiliary equipment is needed, which not only reduces efficiency but also increases the risk of work. The safety cage without additional support points lacks stability during hoisting, so the internal personnel are always in a state of motion (mainly swinging). If the dynamic vision is insufficient, it is difficult to find cracks in the deep foundation pit wall.

[0005] The emergency braking system of such equipment has insufficient reliability. Most of them only rely on the self-braking of the hoisting equipment. When the hoisting equipment fails and the safety cage falls abnormally, it cannot be quickly stopped by rigid clamping with the fixed structure of the deep foundation pit, which can easily cause safety accidents and is difficult to meet the dual demands of flexibility and safety in deep foundation pit work. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the above difficulties and provide a safety protection device for deep foundation pit of construction site.

[0007] To solve the above technical problems, the technical scheme provided by the present application is as follows: a safety protection device for a deep foundation pit of a construction site, comprising a safety cage, the safety cage being lifted along a wall of the deep foundation pit by hoisting equipment, and further comprising vertical rods and a protection mechanism, the vertical rods being provided with a plurality of mounting plates fixed to the wall of the deep foundation pit and a rib plate connected to the mounting plates, and the protection mechanism being arranged on one side of the safety cage to enable the safety cage to move up and down along the vertical rods and to move horizontally on the vertical rods;

[0008] The protection mechanism comprises a fixing frame, a transmission frame and a horizontal moving frame, the fixing frame being connected to the safety cage, the transmission frame being arranged between the fixing frame and the horizontal moving frame and being slidably arranged on the fixing frame, and the horizontal moving frame being slidably arranged on the transmission frame, the fixing frame and the horizontal moving frame each being provided with a clamping pulley mechanism and a locking mechanism, the fixing frame being provided at the bottom with an emergency brake mechanism, the clamping pulley mechanism enabling the protection mechanism to move along the vertical rods, and the locking mechanism, in a locking state, keeping the fixing frame and the horizontal moving frame at a distance from the vertical rods and, when the emergency brake mechanism is actuated, being locked with the rib plate to prevent the safety cage from falling.

[0009] As an improvement, the clamping pulley mechanism comprises a fixed table, clamping plates being hingedly arranged on both sides of the fixed table, and rollers being rotatably arranged on the fixed table and the clamping plates to cooperate with the vertical rods.

[0010] As an improvement, the clamping plates are provided with guide rods, the guide rods being provided with guide sliding tables, the fixing frame and the transmission frame being provided with limiting mechanisms matched with the clamping pulley mechanism, the limiting mechanisms comprising limiting plates, the limiting plates being slidably arranged on the matched fixed tables, and the limiting plates being provided with guide grooves slidably matched with the guide sliding tables.

[0011] As an improvement, the fixing frame is provided with an extension rod passing through the gaps between the transmission frame and the horizontal moving frame, the extension rod being provided at the end with a frame located between the vertical rods and the horizontal moving frame, the limiting mechanisms further comprising follow-up tables matched with the limiting plates, the follow-up tables matched with the clamping pulley mechanism of the fixing frame being slidably arranged on the transmission frame, and the follow-up tables matched with the clamping pulley mechanism of the horizontal moving frame being slidably arranged on the frame.

[0012] As an improvement, the limiting plates are provided with wing plates, the follow-up tables are provided with sliding rods passing through through holes in the wing plates, and the sliding rods are provided with springs connected with the wing plates.

[0013] As an improvement, the emergency brake mechanism comprises a fixed box connected with the fixing frame, the fixed box being rotatably provided with a driving wheel matched with the vertical rods, the fixed box being hingedly provided at the front end with pressing plates on both sides of the driving wheel, the pressing plates being provided at the back with springs connected with the fixed box, the pressing plates being provided with brake shoes, the fixed box being slidably provided with a push rod, the end of the push rod pushing the pressing plates to rotate, and the fixed box being provided with a transmission structure converting the torsion of the driving wheel into the pushing force of the push rod.

[0014] As improvement: the transmission structure includes a ring wheel, and driving wheels are arranged on both sides of the ring wheel; a rotating wheel is arranged outside the driving wheel; a centrifugal plug is arranged in the groove outside the rotating wheel and connected by a spring; the rotating wheel is arranged in the ring wheel; a plug groove matched with the centrifugal plug is arranged on the inner side of the ring wheel; a gear one is coaxially arranged on one side of the ring wheel; and a rack matched with the gear one is arranged on the bottom of the push rod.

[0015] As improvement: the locking mechanism includes a semicircular fixed table, an arc-shaped groove is arranged in the semicircular fixed table, a semicircular plug is rotatably arranged in the arc-shaped groove, a motor two is arranged on the semicircular fixed table and drives the semicircular plug to rotate, and the semicircular fixed table and the semicircular plug both include a recess allowing the vertical rod to extend into.

[0016] As improvement: the fixing frame is provided with a pneumatic cylinder, the output end of the pneumatic cylinder drives the transmission frame to slide forward and backward on the fixing frame, a motor one and a threaded column are arranged on the transmission frame, the motor one drives the threaded column to rotate on the transmission frame, a driving block is arranged on the transverse moving frame, and a threaded hole matched with the threaded column is arranged on the driving block.

[0017] Compared with the prior art, the safety protection device for the building site deep foundation pit has the advantages that the core problems of poor mobility and insufficient safety protection of the existing equipment are effectively solved, the stable lifting of the safety cage along the vertical rod is realized through the cooperative design of the vertical rod, the protection mechanism and the safety cage, the precise horizontal movement between multiple vertical rods is completed through the two-stage transmission of the fixing frame, the transmission frame and the transverse moving frame, the operation range is greatly expanded, and specifically:

[0018] 1. Compared with the limitation that the existing equipment can only move vertically, the device is driven by the pneumatic cylinder to slide forward and backward, and the transverse moving frame is driven by the motor to slide left and right, so that a two-stage transmission structure is constructed, the safety cage can be flexibly switched horizontally between multiple vertical rods, the operation position can be adjusted without external auxiliary equipment, and the operation efficiency is greatly improved.

[0019] 2. The device realizes the opening and closing of the clamping plate and stable guidance through the automatic cooperation of the limiting mechanism and the clamping pulley mechanism, and the overall power component only depends on a small amount of equipment such as a pneumatic cylinder and a motor, so that the fault points are reduced, the equipment weight and maintenance cost are reduced, and the continuity and stability of long-term operation are improved.

[0020] 3. The emergency brake mechanism and the locking mechanism form double braking protection, can quickly and clamping plate and stop through the brake piece when the safety cage abnormally falls, significantly improve the protection reliability, the overall structure is simple and the number of power components is small, the fault probability is reduced, and the safety and efficiency requirements of deep foundation pit operation are met in all directions.

[0021] 4. The emergency brake mechanism triggers the brake by centrifugal force, quickly pushes the brake pad to stop when the driving wheel speed rises, and the locking mechanism can form rigid clamping with the rib plate on the vertical rod. Double braking avoids the single dependence of the existing equipment on hoisting braking, effectively eliminates the risk of abnormal falling of the safety cage. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the use state diagram of the present application.

[0023] Figure 2 is the structural diagram of the present application.

[0024] Figure 3 is the exploded view of the present application.

[0025] Figure 4 is the sectional view of the present application.

[0026] Figure 5 is the exploded view of the protection mechanism of the present application.

[0027] Figure 6 is the structural diagram of the fixing frame of the present application.

[0028] Figure 7 is the structural diagram of the transmission frame of the present application.

[0029] Figure 8 is the structural diagram of the horizontal moving frame of the present application.

[0030] Figure 9 is the structural diagram of the clamping pulley mechanism of the present application.

[0031] Figure 10 is the connection diagram of the limiting mechanism of the present application.

[0032] Figure 11 is the structural diagram of the limiting mechanism of the present application.

[0033] Figure 12 is the structural diagram of the emergency brake mechanism of the present application.

[0034] Figure 13 is the exploded view of the emergency brake mechanism of the present application.

[0035] Figure 14 is the exploded view of the transmission structure of the emergency brake mechanism of the present application.

[0036] Figure 15 is the structural diagram of the centrifugal insertion station of the present application.

[0037] Figure 16 is the exploded view of the locking mechanism of the present application.

[0038] As shown in the figure: 1, vertical rod; 2, safety cage; 3, protection mechanism; 4, fixed frame; 5, transmission frame; 6, horizontal moving frame; 7, clamping pulley mechanism; 8, limiting mechanism; 9, emergency brake mechanism; 10, locking mechanism; 11, mounting plate; 12, rib plate; 21, connecting frame; 22, lifting hook; 41, air cylinder; 42, outer extension table; 43, extension rod; 44, frame; 45, slide rail one; 46, slide groove one; 47, mounting frame; 51, motor one; 52, threaded column; 53, slide rail two; 54, slide groove two; 55, slide rail three; 61, drive block; 62, slide rail four; 71, fixed table; 72, clamping plate; 73, roller; 74, guide rod; 75, guide sliding table; 76, slide groove three; 81, limiting plate; 811, guide groove; 812, sliding block; 813, wing plate; 82, follow-up table; 821, slide groove four; 822, slide rod; 823, spring one; 91, fixed box; 92, drive wheel; 921, rotating wheel; 922, centrifugal insertion table; 923, spring two; 93, pressing plate; 931, spring three; 94, brake pad; 95, ring wheel; 951, insertion slot; 952, gear one; 96, push rod; 961, rack; 101, semi-arc fixed table; 102, arc-shaped groove; 103, motor two; 104, gear two; 105, semi-arc insertion table; 106, gear ring. DETAILED DESCRIPTION

[0039] The application will be further described in detail below with reference to the accompanying drawings.

[0040] The accompanying drawings Figure 1 and the accompanying drawings Figure 2 As shown in the figure: a safety protection device for a deep foundation pit of a construction site, comprising a safety cage 2, the safety cage 2 being lifted along the wall of the deep foundation pit by hoisting equipment, and further comprising vertical rods 1 and a protection mechanism 3, the vertical rods 1 being provided with a plurality of mounting plates 11 fixed to the wall of the deep foundation pit and rib plates 12 connected with the mounting plates 11, and the protection mechanism 3 being arranged at one side of the safety cage 2 to enable the safety cage 2 to move up and down along the vertical rods 1 and move horizontally on the plurality of vertical rods 1.

[0041] The accompanying drawings Figure 3 and the accompanying drawings Figure 5As shown, the protection mechanism 3 includes a fixed frame 4, a transmission frame 5 and a transverse frame 6, the fixed frame 4 is connected to the safety cage 2, the safety cage 2 is provided with a connecting frame 21 connecting the fixed frame 4 and the safety cage 2, the connecting frame 21 is provided with a lifting hook 22, an external winch drives the safety cage 2 and the protection mechanism 3 to move up and down through the lifting hook 22, the transmission frame 5 is arranged between the fixed frame 4 and the transverse frame 6 and is slidably arranged on the fixed frame 4, the transverse frame 6 is slidably arranged on the transmission frame 5, the fixed frame 4 is provided with an outer extension table 42, the outer extension table 42 and the transverse frame 6 are both provided with a clamping pulley mechanism 7 and a locking mechanism 10, the fixed frame 4 is provided with an emergency brake mechanism 9 on the mounting frame 47 at the bottom, the clamping pulley mechanism 7 drives the protection mechanism 3 to move along the stand 1, the locking mechanism 10 keeps the fixed frame 4 and the transverse frame 6 at a distance from the stand 1 in the locked state, and is clamped with the rib plate 12 when the emergency brake mechanism 9 is braked, thereby preventing the safety cage 2 from falling.

[0042] The safety protection device for the deep foundation pit of the construction site mainly solves the problems of the safety cage 2 moving flexibility and safety protection in the deep foundation pit operation, which can realize the stable lifting of the safety cage 2 along the foundation pit wall, can make it move transversely between different stands 1, and can provide reliable braking in emergency to protect the safety of the workers.

[0043] The working principle is as follows: the safety cage 2 is connected to the fixed frame 4 of the protection mechanism 3 through the connecting frame 21, and an external winch provides lifting power through the lifting hook 22 on the connecting frame 21 to drive the safety cage 2 and the protection mechanism 3 to move as a whole, the clamping pulley mechanism 7 in the protection mechanism 3 is arranged on the outer extension table 42 of the fixed frame 4 and the transverse frame 6 respectively, and guides the movement of the safety cage 2 along the stand 1 to ensure the stable lifting of the safety cage 2 along the stand 1; when it is needed to move transversely between multiple stands 1, the front and rear sliding of the transmission frame 5 on the fixed frame 4 and the left and right sliding of the transverse frame 6 on the transmission frame 5 are matched to drive the safety cage 2 to complete the transverse position adjustment; the locking mechanism 10 is in the unlocked state in normal operation and in the locked state in the emergency braking state, and when moving transversely, the locking mechanism 10 alternately maintains the reasonable distance between the fixed frame 4, the transverse frame 6 and the stand 1 to ensure the smoothness and stability of the movement; when the emergency brake mechanism 9 is started, the locking mechanism 10 is quickly clamped with the rib plate 12 on the stand 1, and the rib plate 12 is fixedly connected with the wall of the deep foundation pit, thereby forming a rigid constraint to immediately prevent the safety cage 2 from falling and realize emergency braking, thereby ensuring the safety of the operation.

[0044] The drawings are attached Figure 4 , the drawings are attached Figure 6 , the drawings are attached Figure 7 and the drawings are attached Figure 8As shown, the fixed frame 4 is provided with a cylinder 41, the output end of the cylinder 41 is connected to the transmission frame 5 and drives the transmission frame 5 to slide forward and backward on the fixed frame 4, the fixed frame 4 is provided with a front-to-back sliding groove 46, the transmission frame 5 is provided with a sliding rail 55 matched with the sliding groove 46, the transmission frame 5 is provided with a motor 51 and a threaded column 52, the motor 51 drives the threaded column 52 to rotate on the transmission frame 5, the transverse moving frame 6 is provided with a driving block 61, the driving block 61 is provided with a threaded hole matched with the threaded column 52, the transmission frame 5 is provided with a left-to-right sliding groove 54, and the transverse moving frame 6 is provided with a sliding rail 62 matched with the sliding groove 54.

[0045] The arrangement of the fixed frame 4, the transmission frame 5 and the transverse moving frame 6 mainly solves the problems of precision and stability of the safety cage 2 in transverse movement in deep foundation pit operation, realizes flexible switching of the safety cage 2 between different vertical rods 1 through structured transmission matching, and ensures reliable guidance during movement.

[0046] The working principle is as follows: the fixed frame 4 serves as a basic bearing structure, and the cylinder 41 provides power to drive the transmission frame 5 to move, when the output end of the cylinder 41 is extended or retracted, the transmission frame 5 realizes stable sliding in the front-to-back direction of the fixed frame 4 by means of the sliding matching of the sliding rail 55 on the transmission frame 5 and the front-to-back sliding groove 46 on the fixed frame 4; after the motor 51 on the transmission frame 5 is started, the threaded column 52 is rotated, and since the driving block 61 of the transverse moving frame 6 is provided with a threaded hole matched with the threaded column 52, the rotational movement of the threaded column 52 is converted into the linear movement of the driving block 61, at the same time, the transverse moving frame 6 realizes stable sliding in the left-to-right direction of the transmission frame 5 through the sliding matching of the sliding rail 62 and the left-to-right sliding groove 54 on the transmission frame 5; the front-to-back sliding driven by the cylinder 41 and the left-to-right sliding driven by the motor 51 are matched with each other, the fixed frame 4, the transmission frame 5 and the transverse moving frame 6 form a two-stage transmission structure, and together drive the safety cage 2 to complete the required transverse displacement adjustment, meeting the operation requirements of transverse movement between multiple vertical rods 1.

[0047] As shown in Figs. 1-3, Figure 9 As shown in Figs. 1-3, Figure 10 As shown in Figs. 1-3, Figure 11 As shown, the clamping pulley mechanism 7 includes a fixed table 71, both sides of the fixed table 71 are hingedly provided with clamping plates 72, the fixed table 71 and the clamping plates 72 are both rotatably provided with rollers 73 matched with the vertical rods 1, the clamping plates 72 are provided with guide rods 74, the guide rods 74 are provided with guide sliding tables 75, the fixed frame 4 and the transmission frame 5 are provided with limiting mechanisms 8 matched with the clamping pulley mechanism 7, the limiting mechanisms 8 include limiting plates 81, the limiting plates 81 are slidably arranged on the matched fixed tables 71, and the limiting plates 81 are provided with arc-shaped guide grooves 811 slidably matched with the guide sliding tables 75.

[0048] As shown in Figs. 1-3, Figure 6 As shown in Figs. 1-3, Figure 7 As shown in Figs. 1-3,Figure 9 , attached Figure 10 and attached Figure 11 As shown in the drawings, the fixed frame 4 is provided with an extension rod 43 passing through the gap of the transmission frame 5 and the transverse frame 6, and the end of the extension rod 43 is provided with a frame 44 between the vertical rod 1 and the transverse frame 6. The limiting mechanism 8 further comprises a follow-up table 82 cooperating with the limiting plate 81, and the follow-up table 82 is provided with a left-right sliding groove four 821. The follow-up table 82 matched with the clamping pulley mechanism 7 on the fixed frame 4 is slidingly matched with the sliding rail two 53 on the transmission frame 5, and the follow-up table 82 matched with the clamping pulley mechanism 7 on the transverse frame 6 is slidingly matched with the sliding rail one 45 on the frame 44. The fixed table 71 is provided with a front-rear sliding groove three 76, and the limiting plate 81 is provided with a sliding block 812 slidingly matched with the sliding groove three 76.

[0049] As shown in the drawings, the limiting plate 81 is provided with a wing plate 813, and the follow-up table 82 is provided with a sliding rod 822 passing through the through hole of the wing plate 813. The sliding rod 822 is provided with a spring one 823 connected with the wing plate 813. Figure 11 The clamping pulley mechanism 7 and the limiting mechanism 8 are mainly used to solve the problem of stable clamping when the protection mechanism 3 moves along the vertical rod 1, to ensure that the roller 73 is always in reliable contact with the vertical rod 1 to ensure smooth movement, and to meet the relative movement of the fixed frame 4, the transmission frame 5 and the transverse frame 6 during the transverse movement of the protection mechanism 3, and to automatically realize the opening and closing of the clamping plate 72.

[0050] The working principle is as follows: in the clamping pulley mechanism 7, the fixed table 71 serves as the basis, and the clamping plate 72 on both sides is hinged and in contact with the vertical rod 1 through the roller 73, forming a surrounding clamping of the vertical rod 1, providing guidance for the movement of the protection mechanism 3 along the vertical rod 1 and avoiding the protection mechanism 3 from separating from the vertical rod 1 during lifting; the limiting mechanism 8 cooperates with the guide sliding table 75 of the clamping plate 72 through the limiting plate 81. When the limiting plate 81 slides forward and backward on the sliding groove three 76 of the fixed table 71, the arc-shaped guide groove 811 will drive the guide sliding table 75 to move along the track of the guide groove 811, thereby driving the clamping plate 72 to rotate around the hinge point, realizing the automatic opening and closing of the clamping plate 72 in different states.

[0051]

[0052] ​The follower stage 82 is connected to the slide rail 53 of the transmission frame 5 or the slide rail 45 of the frame 44 via the slide groove 821. Since the limiting plate 81 and the follower stage 82 are connected to the through hole of the wing plate 813 via the slide rod 822 and the slide groove 76 is connected to the slider 812, the follower stage 82 and the limiting plate 81 can only move forward and backward. Since the guide slide 75 is always in the guide groove 811, the left and right movement of the limiting plate 81 is restricted. There is no up and down movement between the fixed frame 4, the transmission frame 5 and the transverse frame 6. Therefore, when the fixed frame 4 and the transmission frame 5 move laterally, the limiting plate 81 and the follower stage 82 remain unchanged in the left and right position. The slide groove 821 on the follower stage 82 slides on the slide rail 53 or the slide rail 45.

[0053] During the lateral displacement of the protective mechanism 3, the cooperation process between the clamping pulley mechanism 7 and the limiting mechanism 8 is as follows: Figure 10 The state shown is that the clamping pulley mechanism 7 maintains the clamping action. When the transmission frame 5 and the transverse frame 6 move forward (towards the fixed frame 4), the fixed frame 4 is kept in a fixed position by the locking mechanism 10. The frame 44 and the follower table 82 on it remain in a fixed position. The guide slide 75 of the clamping pulley mechanism 7 on the transverse frame 6 moves along the trajectory of the guide groove 811, automatically opening the clamping plate 72 to avoid obstructing the transmission frame 5 and the transverse frame 6 from continuing to move forward. The limiting plate 81 has a tendency to move forward under the push of the reaction force. At this time, the limiting plate 81... The wing plate 813 at the bottom of the position plate 81 is blocked by the follower stage 82, and the position of the limiting plate 81 remains unchanged, ensuring that the clamping plate 72 can be fully opened. At the same time, the position of the clamping pulley mechanism 7 on the fixed frame 4 remains unchanged, and the follower stage 82 of the corresponding limiting mechanism 8 moves forward with the transmission frame 5 under the pull of the slide rail 53. The guide slide 75 is at the end of the guide groove 811, so that the limiting plate 81 cannot move with the follower stage 82 and remains in the same position. At this time, the relative movement of the limiting plate 81 and the follower stage 82 compresses the spring 823.

[0054] When the transverse frame 6 moves laterally on the transmission frame 5, causing the clamping pulley mechanism 7 on the transverse frame 6 to move to the next upright position, the guide slide 75 and the guide groove 811 limit the left and right directions, and the limiting plate 81 corresponding to the clamping pulley mechanism 7 on the transverse frame 6 moves with the transverse frame 6. The corresponding follower table 82 moves laterally on the frame 44, while the clamping pulley mechanism 7 and the limiting mechanism 8 on the fixed frame 4 remain in unchanged positions.

[0055] After the clamping pulley mechanism 7 on the transverse frame 6 reaches the position, the transverse frame 6 and the transmission frame 5 move back to reset, the limiting plate 81 and the follow-up table 82 on the fixed frame 4 reset, and the spring 823 resets; the clamping pulley mechanism 7 on the transverse frame 6 moves along the track of the guide groove 811 in the reset process, and gradually closes the clamping plate 72 when the fixed table 71 approaches the stand 1. During this process, the pushing force of the spring 823 on the wing plate 813 prevents the limiting plate 81 from moving backward.

[0056] The above process completes the first stage of transverse movement. In the second stage, the locking mechanism 10 on the transverse frame 6 is in the locked state, and the locking mechanism 10 on the fixed frame 4 is in the unlocked state. Under the push of the air cylinder 41, the fixed frame 4 moves forward (away from the stand 1). During this process, the corresponding limiting mechanism 8 of the clamping pulley mechanism 7 on the fixed frame 4 moves in the opposite direction of the limiting mechanism 8 of the clamping pulley mechanism 7 on the transverse frame 6. After the fixed frame 4 moves, the transmission frame 5 and the fixed frame 4 are pulled back by the transverse frame 6 in a fixed position under the action of the threaded column 52, so that the relative positions of the fixed frame 4, the transmission frame 5 and the transverse frame 6 return to the initial state. Then the fixed frame 4 moves backward, so that the clamping pulley mechanism 7 on the fixed frame 4 completes the clamping of the stand 1, and the overall transverse movement is completed.

[0057] The above process realizes the relative movement between the fixed frame 4, the transmission frame 5 and the transverse frame 6, the clamping of the clamping pulley mechanism 7 in different positions and the automatic opening of the work through the locking work of the air cylinder 41, the motor 51 and the locking mechanism 10, effectively reduces the number of power workpieces, reduces the weight of the protection mechanism 3 and the probability of power damage, and improves the safety and continuity of the protection mechanism 3.

[0058] Combined with the drawings Figure 12 and the drawings Figure 13 As shown, the emergency brake mechanism 9 includes a fixed box 91 connected with the fixed frame 4, a driving wheel 92 rotatingly arranged in the fixed box 91 and matched with the stand 1, a pressing plate 93 hingedly arranged on the front end of the fixed box 91 and on both sides of the driving wheel 92, a spring 931 arranged on the rear side of the pressing plate 93 and connected with the fixed box 91, a brake piece 94 arranged on the pressing plate 93, a push rod 96 slidingly arranged in the fixed box 91 and pushing the pressing plate 93 to rotate at the end, and a transmission structure arranged in the fixed box 91 and converting the torsion of the driving wheel 92 into the pushing force of the push rod 96.

[0059] Combined with the drawings Figure 13 , the drawings Figure 14 and the drawings Figure 15As shown, the transmission structure includes a ring wheel 95, and the drive wheel 92 is provided with a rotating wheel 921 on both sides, and the outer side of the rotating wheel 921 is provided with a centrifugal plug 922 connected by a spring 923, the rotating wheel 921 is arranged in the ring wheel 95, the inner side of the ring wheel 95 is provided with a plug groove 951 matched with the centrifugal plug 922, and the ring wheel 95 is coaxially connected with a gear 952 on one side. The bottom of the push rod 96 is provided with a rack 961 engaged with the gear 952.

[0060] The setting of the emergency brake mechanism 9 mainly solves the problem of rapid braking of the safety cage 2 in the case of sudden falling and other emergencies in deep foundation pit operation, and realizes the instant stop of the safety cage 2 by converting the abnormal rotating speed of the drive wheel 92 into braking power, so as to avoid accidents.

[0061] The working principle is as follows: the emergency brake mechanism 9 takes the fixed box 91 as the installation basis, the drive wheel 92 cooperates with the stand 1, and rotates synchronously with the lifting of the safety cage; in normal state, the rotating wheel 921 rotates stably with the drive wheel 92, the centrifugal plug 922 is retracted in the groove of the rotating wheel 921 under the tension of the spring 923, does not cooperate with the plug groove 951 of the ring wheel 95, the ring wheel 95 remains stationary, the push rod 96 is inactive, the pressing plate 93 is in the initial position under the action of the spring 931, the brake pad 94 is separated from the drive wheel 92, and no braking effect is generated; when the safety cage 2 abnormally falls to cause the drive wheel 92 to suddenly increase in rotating speed, the centrifugal force of the rotating wheel 921 increases, the centrifugal plug 922 extends outward against the tension of the spring 923, is inserted into the plug groove 951 on the inner side of the ring wheel 95, and drives the ring wheel 95 to rotate synchronously; the gear 952 on one side of the ring wheel 95 rotates, the rotating motion is converted into the linear sliding of the push rod 96 through the meshing transmission with the rack 961 at the bottom of the push rod 96, the end of the push rod 96 drives the pressing plate 93 on both sides to rotate around the hinge point, and the spring 931 is stretched, so that the brake pad 94 on the pressing plate 93 tightly adheres to the drive wheel 92, generates strong friction force to prevent the drive wheel 92 from rotating, and cooperates with the clamping action of the locking mechanism 10 and the rib plate 12 to realize the emergency braking of the safety cage 2 and prevent it from continuing to fall.

[0062] When the brake pad 94 just adheres to the stand 1, the push rod 96 stops moving forward, so that the gear 952 and the ring wheel 95 stop rotating, at this time, the safety cage 2 is still in the falling state, and the drive wheel 92 is still accelerating, at this time, the inclined surface at the top of the centrifugal plug 922 is in sliding cooperation with the inclined surface of the plug groove 951, the centrifugal plug 922 temporarily leaves the plug groove 951, and under the action of the centrifugal force, the centrifugal plug 922 is inserted into the next plug groove 951, and the process is repeated, so that the ring wheel 95 maintains the rotating trend, so that the push rod 96 continuously applies a pushing force to the pressing plate 93, and the contact between the brake pad 94 and the stand 1 is maintained.

[0063] The gas cylinder can be added on the mounting frame 47, the output end is connected with the ejector rod, the end of the ejector rod is abutted with the tail end of the push rod 96, when the push rod 96 is away from the ejector rod, the gas cylinder actively pushes the push rod 96 to move forward through the ejector rod, and the auxiliary supporting force is provided for the push rod 96, and the stable support is provided for the push rod 96, so that the brake block 94 is always attached to the vertical rod 1.

[0064] The drawings are attached Figure 2 The drawings are attached Figure 16 As shown in the drawings, the locking mechanism 10 comprises a semicircular fixed table 101, an arc-shaped groove 102 is arranged in the semicircular fixed table 101, a semicircular insertion table 105 is rotatably arranged in the arc-shaped groove 102, a motor two 103 is arranged on the semicircular fixed table 101, a gear two 104 is arranged at the output end of the motor two 103, a tooth ring 106 is arranged on the semicircular insertion table 105 and is engaged with the gear two 104, and the semicircular fixed table 101 and the semicircular insertion table 105 both comprise a recess allowing the vertical rod 1 to extend into.

[0065] The locking mechanism 10 is mainly arranged to solve the problems that the fixed frame 4 or the transverse moving frame 6 keeps a stable distance with the vertical rod 1 when the safety cage 2 moves horizontally, and the muscle plate 12 is quickly clamped to realize braking in an emergency, through the rotation cooperation of the structure, the smooth movement can be ensured, and reliable locking can be provided in an emergency.

[0066] The working principle is as follows: the locking mechanism 10 is based on the semicircular fixed table 101, the recesses on the semicircular fixed table 101 and the semicircular insertion table 105 jointly form a space allowing the vertical rod 1 to pass through, in a normal state, the semicircular insertion table 105 is hidden in the arc-shaped groove 102, the recesses on the semicircular fixed table 101 and the semicircular insertion table 105 are coincided, a space enough to accommodate the vertical rod 1 to pass through is formed, and when the safety cage 2 moves up and down, the muscle plate passes through the recess, so that the safety cage 2 is not hindered when moving along the vertical rod 1; when the locking mechanism 10 needs to be clamped, the motor two 103 drives the gear two 104, the semicircular insertion table 105 rotates in the arc-shaped groove 102, one end of the semicircular insertion table 105 extends out of the arc-shaped groove 102 and reenters the arc-shaped groove 102 through the recess, at this time, the recesses of the semicircular fixed table 101 and the semicircular insertion table 105 are misaligned, and the two form a complete ring, at this time, the movement of the fixed frame 4 or the transverse moving frame 6 can be limited, in an emergency braking condition, the falling speed of the safety cage 2 is reduced through the emergency brake mechanism 9, that is, the impact force of the safety cage 2 is reduced, then the semicircular insertion table 105 of the locking mechanism 10 is clamped with the muscle plate 12 on the vertical rod 1, the muscle plate 12 is fixedly connected with the wall of the deep foundation pit, the locking mechanism 10 and the vertical rod 1 are firmly locked, so that the safety cage 2 is prevented from continuing to fall, and double braking is realized through the emergency brake mechanism 9.

[0067] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired thereby, without departing from the spirit of the present application, without creating a similar structure and embodiment of the technical solution, which should belong to the protection scope of the present application.

Claims

1. A safety protection device for deep foundation pit of construction site, comprising a safety cage (2) which is lifted along the wall of the deep foundation pit by hoisting equipment, characterized in that: it further comprises vertical rods (1) and a protection mechanism (3), the vertical rods (1) are provided with a plurality of mounting plates (11) fixed on the wall of the deep foundation pit and rib plates (12) connected with the mounting plates (11), and the protection mechanism (3) is arranged on one side of the safety cage (2) to move the safety cage (2) up and down along the vertical rods (1) and transversely on the vertical rods (1); the protection mechanism (3) comprises a fixed frame (4), a transmission frame (5) and a transverse moving frame (6), the fixed frame (4) is connected with the safety cage (2), the transmission frame (5) is arranged between the fixed frame (4) and the transverse moving frame (6) and is slidably arranged on the fixed frame (4), the transverse moving frame (6) is slidably arranged on the transmission frame (5), the fixed frame (4) and the transverse moving frame (6) are both provided with a clamping pulley mechanism (7) and a locking mechanism (10), the bottom of the fixed frame (4) is provided with an emergency brake mechanism (9), the clamping pulley mechanism (7) moves the protection mechanism (3) along the vertical rods (1), the locking mechanism (10) keeps the fixed frame (4) and the transverse moving frame (6) at a distance from the vertical rods (1) in the locked state, and clamps with the rib plates (12) when the emergency brake mechanism (9) is braked, thereby preventing the safety cage (2) from falling. The clamping pulley mechanism (7) comprises a fixed table (71), the fixed table (71) is hingedly provided with clamping plates (72) on both sides, and the fixed table (71) and the clamping plates (72) are both rotatably provided with rollers (73) matched with the vertical rods (1).

2. The safety protection device for deep foundation pit of construction site according to claim 1, characterized in that: The clamping plates (72) are provided with guide rods (74), the guide rods (74) are provided with guide sliding tables (75), the fixed frame (4) and the transmission frame (5) are provided with limiting mechanisms (8) matched with the clamping pulley mechanism (7), and the limiting mechanisms (8) comprise limiting plates (81) slidably arranged on the matched fixed tables (71), and the limiting plates (81) are provided with guide grooves (811) slidably matched with the guide sliding tables (75).

3. A safety protection device for deep foundation pit of construction site according to claim 2, characterized in that: The fixed frame (4) is provided with an extension rod (43) passing through the gaps of the transmission frame (5) and the transverse moving frame (6), the end of the extension rod (43) is provided with a frame (44) located between the vertical rod (1) and the transverse moving frame (6), the limiting mechanism (8) further comprises a follow-up table (82) matched with the limiting plate (81), the follow-up table (82) matched with the clamping pulley mechanism (7) on the fixed frame (4) is slidably arranged on the transmission frame (5), and the follow-up table (82) matched with the clamping pulley mechanism (7) on the transverse moving frame (6) is slidably arranged on the frame (44).

4. The safety protection device for deep foundation pit of construction site according to claim 3, characterized in that: The limiting plate (81) is provided with a wing plate (813), the follow-up table (82) is provided with a sliding rod (822) passing through a through hole in the wing plate (813), and the sliding rod (822) is provided with a spring I (823) connected with the wing plate (813).

5. A safety protection device for deep foundation pit of construction site according to claim 4, characterized in that: ​ 6. The safety protection device for deep foundation pit of construction site according to claim 1, characterized in that: The emergency brake mechanism (9) comprises a fixed box (91) connected with the fixed frame (4), a driving wheel (92) rotatingly arranged in the fixed box (91) and matched with the vertical rod (1), a pressing plate (93) hingedly arranged at the front end of the fixed box (91) and on both sides of the driving wheel (92), a spring three (931) arranged at the rear side of the pressing plate (93) and connected with the fixed box (91), a brake piece (94) arranged on the pressing plate (93), a push rod (96) slidingly arranged in the fixed box (91) and pushing the pressing plate (93) to rotate, and a transmission structure arranged in the fixed box (91) and converting the torsion of the driving wheel (92) into the pushing force of the push rod (96).

7. A safety protection device for deep foundation pit of construction site according to claim 6, characterized in that: The transmission structure comprises a ring wheel (95), a rotating wheel (921) arranged at both sides of the driving wheel (92), a centrifugal plug-in station (922) arranged in the groove at the outer side of the rotating wheel (921) and connected by a spring two (923), the rotating wheel (921) arranged in the ring wheel (95), an insertion groove (951) arranged at the inner side of the ring wheel (95) and matched with the centrifugal plug-in station (922), a gear one (952) coaxially connected with one side of the ring wheel (95), and a rack (961) arranged at the bottom of the push rod (96) and engaged with the gear one (952).

8. The safety protection device for deep foundation pit of construction site according to claim 1, characterized in that: The locking mechanism (10) comprises a semi-arc-shaped fixed table (101), an arc-shaped groove (102) arranged in the semi-arc-shaped fixed table (101), a semi-arc-shaped plug-in station (105) rotatingly arranged in the arc-shaped groove (102), a motor two (103) arranged on the semi-arc-shaped fixed table (101) and driving the semi-arc-shaped plug-in station (105) to rotate, and the semi-arc-shaped fixed table (101) and the semi-arc-shaped plug-in station (105) each comprising a recess allowing the vertical rod (1) to extend into.

9. The safety protection device for deep foundation pit of construction site according to claim 1, characterized in that: The fixed frame (4) is provided with an air cylinder (41), the output end of the air cylinder (41) drives a transmission frame (5) to slide on the fixed frame (4), the transmission frame (5) is provided with a motor one (51) and a threaded column (52), the motor one (51) drives the threaded column (52) to rotate on the transmission frame (5), the transverse frame (6) is provided with a driving block (61), and the driving block (61) is provided with a threaded hole matched with the threaded column (52).

Images