Concrete curing device for bridge pier construction

Abstract

The present invention relates to the technical field of bridge maintenance, and more particularly to a concrete curing device for bridge pier construction, comprising a frame disposed on top of the pier; a plurality of winches circumferentially disposed on the frame; a sling wound around each winch, the free ends of all the slings being connected to a spray rack for spraying the pier; a plurality of limit rings being sleeved on all the slings, the limit rings being arranged vertically, and a plurality of first elastic members being circumferentially connected between adjacent limit rings, between the uppermost limit ring and the frame, and between the lowermost limit ring and the spray rack. The limit rings are provided to connect all the slings together, reducing the swing amplitude of a single sling; and the first elastic members are provided to enable the plurality of limit rings to be arranged at equal intervals during the downward movement of the spray rack, thereby consistently limiting the position of the slings.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge maintenance, and in particular to a concrete maintenance device for bridge pier construction. Background Art

[0002] Bridge piers, as critical load-bearing components of the bridge structure, are typically cast and formed using concrete. After concrete pouring, scientific and rational maintenance of the piers is crucial. The core of the maintenance process lies in maintaining a constant moisture content on the concrete surface, creating favorable conditions for the cement hydration reaction and ensuring that the cement's hydration properties are fully utilized. If maintenance is not carried out promptly, the concrete surface will lose water, forcing the cement hydration reaction to cease. This, in turn, will lead to shrinkage cracks on the concrete surface. These cracks not only weaken the concrete's structural strength but also pose a significant risk to the bridge's future safe operation.

[0003] Currently, a common practice in bridge pier spray maintenance is to use a lift to move the spray rack up and down, thereby achieving large-scale spray coverage of the pier surface. However, this maintenance method faces a significant problem in practical application: due to the height of the pier itself, when encountering strong winds, the spray rack will shake violently due to the wind. This shaking may not only cause the spray rack to collide with the pier body, causing damage to the pier surface, but also cause the lift supporting the spray rack to shake, posing a serious safety hazard.

[0004] To effectively address the above-mentioned problems, related technologies, such as Chinese patent CN109403207B, disclose a concrete pier spray curing device, which supports a spray frame on the pier body through support wheels, thereby improving the stability of the spray frame.

[0005] However, the above-mentioned concrete pier spray curing device also has some problems during actual use: in summer and special high-temperature areas, in order to reduce water evaporation during the curing process, it is usually necessary to first wrap a moisturizing film on the outside of the pier, and then perform spray curing operations; however, since the moisturizing film is difficult to fit completely and tightly when wrapped around the outside of the pier, the support wheel is very likely to be entangled with the moisturizing film during the movement with the spray frame, and once entanglement occurs, the support wheel will be stuck, which not only affects the normal spraying, but also has an adverse effect on the protective effect of the pier; in addition, the edge of the support wheel is easy to scratch the moisturizing film during movement, resulting in incomplete wrapping of the moisturizing film, which accelerates water evaporation and cannot effectively ensure the wetness of the concrete surface, ultimately affecting the curing quality and protective effect of the pier. Summary of the Invention

[0006] Based on this, it is necessary to provide a concrete curing device for bridge pier construction to address the problem of poor curing effect in the current pier curing process.

[0007] The above purpose is achieved through the following technical solutions:

[0008] A concrete curing device for bridge pier construction, comprising a frame, which is arranged on the top of the pier; a plurality of winches are circumferentially arranged on the frame; each winch is wound with a sling, and the free ends of all the slings are commonly connected to a spray rack, which can slide in a vertical direction under the drive of the slings and is configured to spray the pier; a plurality of limiting rings are commonly sleeved on all the slings, and the plurality of limiting rings are arranged in a vertical direction; a plurality of first elastic members are circumferentially connected between adjacent limiting rings, between the limiting ring located at the top and the frame, and between the limiting ring located at the bottom and the spray rack.

[0009] Furthermore, the top of the spray rack and the tops of all the limiting rings except the limiting ring located at the top are provided with a plurality of guide ropes along the circumferential direction, and the guide ropes extend in the vertical direction. The guide ropes slide through the limiting ring located at the bottom or the limiting ring located above the adjacent limiting rings, and can form a stop fit with the limiting ring located at the bottom or the limiting ring located above the adjacent limiting rings.

[0010] Furthermore, on each of the limiting rings, a mounting ring is provided at the position connected to the sling, and the mounting ring is sleeved on the outer circumference of the sling; two elastic top rings are axially inserted in each of the mounting rings, and the elastic top rings are sleeved on the outer circumference of the sling and can be in frictional contact with the sling; a guide assembly is provided in each of the mounting rings, and the guide assembly is configured to drive the elastic top ring located below to contract inward and clamp the sling when the sling is in frictional contact with the elastic top ring located above.

[0011] Furthermore, the guide assembly includes an iris ring, each of the mounting rings is inserted into the iris ring, the iris ring is arranged above the elastic top ring located above, and can rotate around its own axis; each of the iris rings is circumferentially provided with a plurality of guide arc grooves; the elastic top ring located above is circumferentially provided with a plurality of guide protrusions, the guide protrusions are slidably inserted in the guide arc grooves; each of the mounting rings is circumferentially provided with a plurality of rotating rods on the inner circumferential wall, the middle part of the rotating rod is hinged to the mounting ring, the rotating rod is located between the two elastic top rings, and the two ends are respectively hinged to the two elastic top rings.

[0012] Furthermore, the distance between the hinge point of the rotating rod on the elastic top ring located above and the hinge point of the rotating rod on the mounting ring is greater than the distance between the hinge point of the rotating rod on the elastic top ring located below and the hinge point of the rotating rod on the mounting ring.

[0013] Furthermore, a ratchet is provided on each of the limiting rings at a position connected to the sling, and the ratchet can rotate in one direction and slide along the radial direction of the limiting ring, and is configured to be frictionally locked on the sling when the sling moves upward relative to the limiting ring; each of the ratchet wheels is connected to the limiting ring through a control component, and the control component is configured to be able to change the clamping force between the ratchet wheel and the sling.

[0014] Furthermore, the control component includes a first slider, a second slider and a stop cam, and the ratchet is hinged with a third slider, and the first slider, the second slider and the third slider are all located in the limiting ring and can slide in the radial direction of the limiting ring; the first slider is connected to the third slider through a second elastic member, and under the action of the second elastic member, the first slider and the third slider have a tendency to move away from each other; a first rack is fixedly provided on the first slider, and the first rack extends in the radial direction of the limiting ring; the second slider is connected to the limiting ring through an elastic damper, and under the action of the elastic damper, the second slider has a tendency to move slowly outward; a second rack is fixedly provided on the second slider, and the second rack extends in the radial direction of the limiting ring, and is spaced apart from the first rack in the vertical direction; a gear is meshed between the first rack and the second rack, and the gear can rotate around its own axis; the stop cam is provided on the frame and can form a stop fit with the second slider.

[0015] Furthermore, each of the limit rings can be connected to the frame through a limit assembly, and the limit assembly is configured to limit the position of the limit ring on the frame; the concrete curing device for bridge pier construction is configured to have a first curing mode and a second curing mode. When the wind level in the environment where the pier is located is less than a preset wind level, the concrete curing device for bridge pier construction is in the first curing mode, and under the action of the limit assembly, the limit rings are released in sequence from bottom to top; when the wind level in the environment where the pier is located is greater than or equal to the preset wind level, the concrete curing device for bridge pier construction is in the second curing mode, the limit assembly fails, and all the limit rings are released synchronously; the concrete curing device for bridge pier construction also includes an adjustment mechanism, and the adjustment mechanism is configured to be able to adjust the curing mode of the concrete curing device for bridge pier construction.

[0016] Furthermore, the limiting assembly includes a fixed block and a spring slider group, and a plurality of the fixed blocks are circumferentially arranged on the outer peripheral wall of each limiting ring; a plurality of the spring slider groups are arranged on the frame, and the plurality of the spring slider groups are arranged in the vertical direction, and each of the spring slider groups includes a plurality of spring sliders, and the plurality of the spring sliders are arranged in the circumferential direction, and the spring sliders can elastically slide along the radial direction of the limiting ring, and can form a stop fit with the fixed block.

[0017] Furthermore, the adjustment mechanism includes a wind sensor, a driving member and a controller. The wind sensor is arranged on the frame and is configured to sense the wind level of the environment in which the pier is located; a plurality of driving members are arranged on the frame, and the driving members and the spring slider are arranged correspondingly, and the driving members are configured to drive the spring slider to slide along the radial direction of the limit ring; the controller is electrically connected to the wind sensor and the driving member at the same time, and is configured to receive the signal sent by the wind sensor, and after processing it, send a start-stop instruction to the driving member.

[0018] The beneficial effects of the present invention are:

[0019] The present invention relates to a concrete curing device for bridge pier construction. By arranging a limiting ring, all the slings are connected into a whole in the circumferential direction. When there is wind, the wind needs to blow all the slings through the connection of the limiting rings to drive a single sling to swing. While reducing the swing amplitude of a single sling, the method of using a support wheel to support the spray frame on the pier is avoided, thereby avoiding the situation where the moisturizing film is damaged due to entanglement between the support wheel and the moisturizing film; by arranging a first elastic member, during the process of the spray frame moving downward, multiple limiting rings can be arranged at equal intervals to limit the slings, so as to reduce the swing of the slings when there is wind and avoid contact with the moisturizing film. While ensuring the integrity of the moisturizing film, the stability during spraying can be improved.

[0020] Furthermore, by setting a guide rope, and sliding the guide rope through the limit ring located at the bottom or the limit ring located above the adjacent limit ring, all the limit rings are connected into a whole. When there is wind, the wind needs to blow all the limit rings to drive a single limit ring to shake and rotate, which can further reduce the shaking of the sling and improve the stability during spraying.

[0021] Furthermore, by providing an elastic top ring and a guide assembly, when the sling is not shaking, the elastic top ring and the sling do not contact each other, thereby reducing the wear and movement resistance of the sling. When the sling shakes, under the action of the guide assembly, the elastic top ring located below can contract inward, thereby clamping the sling to achieve fixed positioning of the sling, thereby ensuring stability and safety during the spraying operation.

[0022] Furthermore, by setting the concrete curing device for bridge pier construction with a first curing mode and a second curing mode, when the wind level in the environment where the pier is located is less than the preset wind level, the concrete curing device for bridge pier construction is in the first curing mode, and under the action of the limiting assembly, the limiting rings are released in sequence from bottom to top, reducing the wear of the limiting rings and the components and slings thereon, and increasing the service life of the limiting rings and the components and slings thereon; when the wind level in the environment where the pier is located is greater than or equal to the preset wind level, the concrete curing device for bridge pier construction is in the second curing mode, the limiting assembly fails, and all the limiting rings are released synchronously, thereby improving stability during spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the three-dimensional structure of the concrete curing device for bridge pier construction provided by the embodiment of the present invention when curing the pier Figure 1 ;

[0024] Figure 2 A schematic diagram of the exploded parts of the concrete curing device for bridge pier construction provided by an embodiment of the present invention when curing a pier;

[0025] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure at P in the middle;

[0026] Figure 4 for Figure 2 Schematic diagram of the partially enlarged structure at the middle Q;

[0027] Figure 5 for Figure 2 A schematic diagram of the partially enlarged structure at the middle U;

[0028] Figure 6 for Figure 2 A schematic diagram of the partially enlarged structure at the middle V;

[0029] Figure 7 A schematic diagram of the front view of the concrete curing device for bridge pier construction provided by an embodiment of the present invention when curing a bridge pier;

[0030] Figure 8 for Figure 7 Middle AA section view;

[0031] Figure 9 for Figure 8 A schematic diagram of the partially enlarged structure at W in the middle;

[0032] Figure 10 for Figure 8 Schematic diagram of the partially enlarged structure at X in the middle;

[0033] Figure 11 for Figure 8 Schematic diagram of the locally enlarged structure at Y in the middle.

[0034] Figure 12 Schematic diagram of the three-dimensional structure of the concrete curing device for bridge pier construction provided by the embodiment of the present invention when curing the pier Figure 2 .

[0035] in:

[0036] 1. Frame; 2. Winch; 3. Sling; 4. Spray rack; 401. Sprinkler; 5. Limiting ring; 6. First elastic member; 7. Guide rope; 8. Mounting ring; 9. Elastic top ring; 10. Guide assembly; 1001. Iris ring; 1002. Guide arc groove; 1003. Guide cam; 1004. Rotating rod; 11. Ratchet; 1201. First slider; 1202. Second slider; 1203. Third slider; 1204. Second elastic member; 1205. First rack; 1206. Elastic damper; 1207. Second rack; 1208. Gear; 1209. Stop cam; 13. Limiting assembly; 1301. Fixed block; 1302. Spring slider; 14. Pier. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments in conjunction with the accompanying drawings.

[0038] Refer to the following Figures 1 to 12 To describe the concrete curing device for bridge pier construction provided by an embodiment of the present invention, it is particularly suitable for spray curing of bridge piers 14. The bridge pier 14 can be cylindrical or square. Of course, it is also suitable for spray curing of other columnar concrete structures.

[0039] Specifically, the concrete curing device for bridge pier construction is configured to include a frame 1. The frame 1 is a cylindrical structure with an open bottom. During installation, it is mounted on the outer periphery of the top of the pier 14 and contacts the top of the pier 14. The frame 1 serves as the foundation for other components and is fixed to the top of the pier 14 by its own weight, thereby providing stable support for the other components. A plurality of winches 2 are arranged circumferentially on the top of the frame 1. Each winch 2 is wound with a sling 3. The sling 3 has a fixed end and a free end. The fixed end is fixed to the winch 2 during installation to ensure that the sling 3 can be wound or released by the winch 2. The free end passes between the pier 14 and the frame 1 during installation and hangs down naturally. The free ends of all slings 3 are connected to a spray rack 4. The spray rack 4 is annular and, when installed, is positioned around the periphery of the pier 14. Multiple nozzles 401 are circumferentially arranged on the spray rack 4. These nozzles 401 are connected to an external water source, with their nozzles facing toward the pier 14. This ensures that when the external water source enters, water is sprayed toward the pier 14 to ensure the surface of the pier 14 is moistened. For example, five winches 2 can be provided, evenly spaced along the circumference of the pier 14. This allows the five slings 3 to be evenly spaced. When the winches 2 are activated, the spray rack 4 can move vertically with uniform force applied, thereby improving the stability of the spray rack 4 during movement and spraying.

[0040] In the field of bridge pier 14 maintenance, in high summer temperatures and in special high-temperature areas, a combined process of "moisturizing film coating plus spraying maintenance" is often used in engineering practice to effectively reduce the evaporation rate during the maintenance process. In specific implementation, the moisturizing film must first be spirally wrapped around the circumference of the pier 14 to form a closed water-retaining layer. Then, the sling 3 is released through the winch 2, and the sling 3 drives the spray rack 4 to move from top to bottom. As the spray rack 4 moves, an external water source is simultaneously introduced into the nozzle 401, which then sprays water toward the pier 14 to ensure the surface of the pier 14 is moistened. The support wheels simultaneously support the spray rack 4 on the pier 14, thereby improving the stability of the spray rack 4. However, this process faces significant technical bottlenecks in actual operation. First, due to the surface roughness of pier 14 and the influence of construction operations, the moisturizing film is difficult to achieve zero-gap adhesion, and wrinkles and bubbles are easily formed at the corners and embedded parts of pier 14. Second, when the spray frame 4 moves, the dynamic contact between the support wheel and the moisturizing film is very likely to cause entanglement. When an entanglement occurs, the stuck support wheel not only interrupts the spraying operation, but also causes the moisturizing film to tear due to local stress concentration, resulting in a curing blind spot on the concrete surface. More importantly, the metal edge of the support wheel forms a sawtooth effect under high-frequency friction. Even if entanglement does not occur, it will still produce tiny cracks on the moisturizing film surface, accelerating water evaporation and failing to effectively ensure the wetness of the concrete surface, ultimately affecting the curing quality and protective effect of pier 14.

[0041] Based on this, in the concrete curing device for bridge pier construction provided by the embodiment of the present invention, it is configured that a plurality of limiting rings 5 ​​are commonly sleeved on all the slings 3, and the plurality of limiting rings 5 ​​are arranged in the vertical direction. When the limiting rings 5 ​​are installed, their axes extend in the vertical direction. In this way, all the slings 3 can be rigidly connected to form an integral force system along the circumferential direction through the limiting rings 5. When encountering wind force, the wind load needs to act on all the slings 3 at the same time to cause the shaking of a single sling 3. This linkage constraint mechanism can significantly reduce the shaking amplitude of a single sling 3, while completely abandoning the traditional support wheel support method, fundamentally avoiding the risk of entanglement and damage caused by contact between the support wheel and the moisturizing film. For example, the number of limiting rings 5 ​​can be set to five. A plurality of first elastic members 6 are circumferentially connected between adjacent limiting rings 5, between the uppermost limiting ring 5 and the frame 1, and between the lowermost limiting ring 5 and the spray rack 4, and the elastic force of the first elastic member 6 acts in the vertical direction; in this way, during the movement of the spray rack 4, the restoring force generated by the elastic deformation of the first elastic member 6 can ensure that the plurality of limiting rings 5 ​​remain evenly distributed at equal intervals, forming a regular three-dimensional limiting network, continuously performing multi-dimensional limiting on the sling 3, and effectively suppressing the lateral swing caused by wind load; at the same time, the flexible connection characteristics of the first elastic member 6 enable the entire limiting system to maintain a non-contact state with the surface of the moisturizing film, which not only avoids physical damage to the moisturizing film by rigid components, but also absorbs the shaking energy of the sling 3 through elastic buffering, while ensuring the integrity of the moisturizing film, reducing the movement and shaking amplitude of the spray rack 4, and improving the stability during the spraying operation.

[0042] It is understandable that the first elastic member 6 can be configured as a spring. The spring extends in the vertical direction when installed; taking the example of a spring connected between two adjacent limiting rings 5, the top end of the spring is vertically fixed to the lower ring surface of the upper limiting ring 5, and the bottom end is vertically fixed to the upper ring surface of the lower limiting ring 5; taking the example of a spring connected between the uppermost limiting ring 5 and the frame 1, the top end of the spring is fixed to the frame 1, and the bottom end is vertically fixed to the upper ring surface of the uppermost limiting ring 5; taking the example of a spring connected between the lowermost limiting ring 5 and the spray rack 4, the top end of the spring is vertically fixed to the lower ring surface of the lowermost limiting ring 5, and the bottom end is fixed to the spray rack 4. For example, the number of springs in each layer can be set to five, and the five springs in the same layer are evenly arranged along the circumference and arranged corresponding to the winch 2, so that when the winch 2 is started, the limit ring 5 and the spray rack 4 can move in the vertical direction with uniform force, thereby improving the stability of the limit ring 5 during movement and the stability of the spray rack 4 during movement and spraying.

[0043] It should be noted that during the spraying operation, all winches 2 are first activated, and all winches 2 simultaneously release the slings 3 attached to them, which then drive the spray rack 4 to move downward. During the movement of the spray rack 4, the spring linkage ensures that the multiple limit rings 5 ​​remain evenly spaced, thereby continuously limiting the slings 3 in multiple dimensions and effectively suppressing lateral swing caused by wind loads. Simultaneously, an external water source is introduced into the spray head 401, which then sprays water toward the bridge pier 14 to ensure the surface of the pier 14 is moistened.

[0044] In a further embodiment, in order to further improve the stability during spraying, it can be provided that a plurality of guide ropes 7 are circumferentially provided on the top of the spray rack 4 and on the tops of all the limit rings 5 ​​except the limit ring 5 at the top. The guide ropes 7 are T-shaped structures and are flexible bodies. The large ends of the guide ropes 7 are at the top when installed, and slide through the limit ring 5 at the bottom or the limit ring 5 located above the adjacent limit ring 5. A T-shaped countersunk structure corresponding to the guide rope 7 is provided on the tops of all the limit rings 5 ​​except the limit ring 5 at the top. When the large end of the guide rope 7 is inserted into the T-shaped countersunk hole, the spray rack 4 can form a stop fit with the limit ring 5 at the bottom, and can then move downward synchronously. The adjacent limit rings The lower limiting ring 5 of the ring 5 can form a stop with the upper limiting ring 5, and can then move downward synchronously, ultimately making all limiting rings 5 ​​and the spray rack 4 form a flexible linkage whole, forming a "limiting ring 5-spray rack 4" vertical force transmission system; in this way, when encountering wind force, the wind load must simultaneously overcome the inertia force of the entire linkage system to cause a single limiting ring 5 to shake or rotate. This flexible linkage mechanism not only further weakens the disturbance of the wind load on the sling 3, but also ensures the verticality of the movement trajectory of the spray rack 4 through mechanical stops, thereby achieving more uniform spray coverage, controlling the surface wetness deviation of the bridge pier 14 within a preset range, and significantly improving the effectiveness of moisturizing maintenance in high-temperature areas. For example, the number of guide cables 7 per layer can be set to five, and the five guide cables 7 on the same layer are evenly arranged along the circumference.

[0045] In other embodiments, in order to further improve the stability during spraying, it can also be arranged that a mounting ring 8 is provided on each limiting ring 5 at the position connected to the sling 3; specifically, when the number of slings 3 is set to five, five mounting rings 8 are vertically provided on the top of each limiting ring 5, and the mounting rings 8 are sleeved on the outer periphery of the sling 3 during installation; two elastic top rings 9 are axially inserted in each mounting ring 8, and the elastic top ring 9 is sleeved on the outer periphery of the sling 3 and can be in frictional contact with the sling 3; a guide assembly 10 is provided in each mounting ring 8, and the guide assembly 10 is configured to drive the elastic top ring 9 located below to shrink inward and clamp the sling 3 when the sling 3 is in frictional contact with the elastic top ring 9 located above.

[0046] Therefore, during normal operation, the elastic top ring 9 and the sling 3 maintain a non-contact state, reducing the wear and movement resistance of the sling 3; when encountering sudden wind force, the guide assembly 10 triggers the elastic top ring 9 to clamp the sling 3, and the clamping force is automatically adjusted with the shaking amplitude, while avoiding the stress concentration problem of the sling 3 that may be caused by rigid limitation, and improving the stability and safety of the spraying operation in complex environment.

[0047] Specifically, the guide assembly 10 includes an iris ring 1001, which is inserted into each mounting ring 8. The iris ring 1001 is positioned above the upper elastic top ring 9 and is rotatable about its own axis. Each iris ring 1001 is circumferentially provided with a plurality of guide arc grooves 1002. Exemplarily, there can be four guide arc grooves 1002, evenly spaced along the circumference. The top of the upper elastic top ring 9 is circumferentially provided with a plurality of guide protrusions 1003. When there are four guide arc grooves 1002, there are correspondingly four guide protrusions 1003, which are slidably inserted into the guide arc grooves 1002 during installation. A plurality of rotating rods 1004 are circumferentially arranged on the inner circumferential wall of each mounting ring 8. The middle part of the rotating rod 1004 is hinged to the mounting ring 8. The rotating rod 1004 is located between the two elastic top rings 9, and the two ends are hinged to the two elastic top rings 9 respectively; exemplary, the number of rotating rods 1004 can be four, and they are evenly arranged along the circumferential direction. When installed, the top end of the rotating rod 1004 is hinged to the bottom of the elastic top ring 9 located above, and the bottom end is hinged to the top of the elastic top ring 9 located below. In this way, when encountering sudden wind force, the wind drives the sling 3 to swing, and the sling 3 simultaneously squeezes the elastic top block located above to one side, and simultaneously drives the iris ring 1001 to rotate through the sliding cooperation between the guide protrusion 1003 and the guide arc groove 1002 thereon, and then drives the elastic top block located above to expand outward in the circumferential direction as a whole through other guide protrusions 1003; when the elastic top block located above expands outward in the circumferential direction as a whole, the elastic top block located below is synchronously driven to shrink inward in the circumferential direction as a whole through the rotating rod 1004 to clamp the sling 3, thereby achieving fixed positioning of the sling 3, thereby ensuring stability and safety during the spraying operation.

[0048] In a further embodiment, in order to save effort, the distance between the hinge point of the rotating rod 1004 on the upper elastic top ring 9 and the hinge point of the rotating rod 1004 on the mounting ring 8 is greater than the distance between the hinge point of the rotating rod 1004 on the lower elastic top ring 9 and the hinge point of the rotating rod 1004 on the mounting ring 8, so that the rotating rod 1004 forms a labor-saving lever. When the sling 3 is shaken by the wind and squeezes the upper elastic top ring 9, the radial force generated by the shaking is transmitted to the upper end hinge point of the rotating rod 1004 through the upper elastic top ring 9. Due to the force arm ratio of the rotating rod 1004 (the power arm length is greater than the resistance arm length), a lever amplification effect is formed. The smaller upper squeezing force can generate a larger radial contraction force at the lower elastic top ring 9 through the leverage action of the rotating rod 1004, thereby eliminating the need for an additional power source. The effect of "small force triggering large clamping force" can be achieved by relying solely on the displacement of the sling 3 caused by wind as a trigger condition.

[0049] Therefore, when a sudden wind causes the sling 3 to shake, the lever mechanism, through the force amplification effect, causes the lower elastic top ring 9 to act on the sling 3 with a faster response speed and a greater clamping force, thereby achieving the limitation of the sling 3 in the initial stage of wind disturbance; at the same time, the mechanical characteristics of the force-saving lever can reduce the fatigue loss of the elastic top ring 9 during long-term use, avoid elastic attenuation caused by frequent force, thereby improving the durability and reliability of the entire limiting system while ensuring the stability of the spraying.

[0050] In other embodiments, in order to reduce the wear of the limiting ring 5 and its components and the sling 3, a ratchet 11 is provided on each limiting ring 5 at the position connected to the sling 3; specifically, when the number of slings 3 is five, five ratchets 11 are provided in each limiting ring 5, and the axis of the ratchet 11 is perpendicular to the sling 3; a ridge is provided on the ratchet 11, and an annular ratchet is provided on the limiting ring 5. The ratchet and the ratchet 11 are coaxially arranged and can form a one-way fit with the ridge, such as Figure 10As shown, the ratchet 11 can only rotate in a single direction, clockwise. When the sling 3 moves upward relative to the retaining ring 5, the engagement between the protrusion and the ratchet teeth causes the ratchet 11 to frictionally lock onto the sling 3. The ratchet 11 can also slide radially along the retaining ring 5. Each ratchet 11 is connected to the retaining ring 5 via a control assembly, which is configured to vary the compressive force between the ratchet 11 and the sling 3. As a result, during the downward movement of the spray rack 4, the control assembly reduces the compressive force between the ratchet 11 and the sling 3, allowing the ratchet 11 to rotate normally. Due to the rolling friction between the ratchet 11 and the sling 3, wear is significantly reduced compared to traditional sliding friction. When the spray rack 4 moves upward, the control assembly increases the compressive force, causing the protrusion and the ratchet teeth to engage and lock, preventing the ratchet 11 from rotating and locking onto the sling 3 through friction. At this point, the retaining ring 5 and the sling 3 are in a relatively static state, completely eliminating sliding friction between them and fundamentally preventing wear.

[0051] Therefore, by utilizing the one-way meshing characteristics of the convex ratchet teeth and combining it with the dynamic adjustment of the clamping force, a linkage response of the movement direction and wear control can be achieved: the rolling friction design during downward movement converts traditional sliding wear into low-loss rolling contact; the locking design during upward movement completely avoids wear by eliminating relative sliding; this adaptive adjustment mechanism does not require an additional power source, and only relies on changes in the direction of movement to trigger different working states. While ensuring the relative movement flexibility of the limit ring 5 and the sling 3, it reduces the wear of key components and improves the reliability of the concrete curing device used in bridge pier construction.

[0052] Specifically, the control assembly and the mounting ring 8 are correspondingly arranged, and are arranged to include a first slider 1201, a second slider 1202, a third slider 1203 and a stop 1209. The first slider 1201, the second slider 1202 and the third slider 1203 are all located in the limiting ring 5 and can slide along the radial direction of the limiting ring 5; Figure 10As shown, the third slider 1203 is hinged on the ratchet 11 so as not to affect the rotation of the ratchet 11; the ratchet is provided on the third slider 1203 so as not to affect the one-way fit between the ratchet and the ridge; the first slider 1201 and the third slider 1203 are located at the same level, and the first slider 1201 is located outside the third slider 1203, and the second slider 1202 is located above the first slider 1201; the first slider 1201 is connected to the third slider 1203 through the second elastic member 1204, and the second elastic member 1202 is located above the first slider 1201. 04, the first slider 1201 and the third slider 1203 have a tendency to move away from each other, so that the clamping force between the ratchet 11 and the sling 3 can be changed by changing the elastic force of the second elastic member 1204; the second elastic member 1204 can be set as a compression spring or a rubber matrix; the second slider 1202 is connected to the limit ring 5 through the elastic damper 1206, and the elastic damper 1206 is located on the inner side of the second slider 1202. Under the action of the elastic damper 1206, the second slider 1202 has a tendency to move slowly outward.

[0053] The elastic damper 1206 is configured to include a cylinder body, which is placed horizontally in the limiting ring 5 during installation. The inner end of the second slider 1202 is sealed and slidably inserted into the cylinder body. A compression spring or a rubber matrix is ​​connected between the inner end of the second slider 1202 and the inner end wall of the cylinder body. Under the action of the compression spring or the rubber matrix, the second slider 1202 has a tendency to move outward. In order to achieve a damping effect, the cylinder body can be configured to have a conical structure with the small end facing outward. A rubber ring is sleeved on the inner end of the second slider 1202, and the rubber ring is in friction contact with the inner circumferential wall of the cylinder body. In this way, the conical structure of the cylinder body and the large friction coefficient of the rubber ring are utilized, and the second slider 1202 can be slowly moved outward under the action of the compression spring or rubber matrix; it can also be arranged that the cylinder body is filled with damping fluid, the inner end of the second slider 1202 and the cylinder body form a piston-like structure, and a plurality of tapered holes are opened on the inner end of the second slider 1202, and the small ends of the tapered holes are arranged inward, so as to utilize the flow characteristics of the damping fluid and the structural characteristics of the tapered holes, and the second slider 1202 can be slowly moved outward under the action of the compression spring or rubber matrix.

[0054] A first rack 1205 is fixedly provided on the top of the first slider 1201, and the first rack 1205 extends in the radial direction of the limiting ring 5; a second rack 1207 is fixedly provided on the bottom of the second slider 1202, and the second rack 1207 extends in the radial direction of the limiting ring 5. A gear 1208 is engaged between the first rack 1205 and the second rack 1207, and the gear 1208 can rotate around its own axis. When the second slider 1202 moves outward, the second slider 120 2 synchronously drives the second rack 1207 outward. The second rack 1207, through engagement with the gear 1208, drives the gear 1208 to rotate. The gear 1208, through engagement with the first rack 1205, drives the first rack 1205 inward. The first rack 1205 synchronously drives the first slider 1201 inward, thereby compressing the second elastic member 1204. The elastic force of the second elastic member 1204 increases, thereby increasing the pressing force between the ratchet 11 and the sling 3. The stopper 1209 is provided on the frame 1 and has a strip-shaped structure. It extends in the radial direction of the limit ring 5 and can form a stop with the second slider 1202.

[0055] When the number of slings 3 is five, the number of stop cams 1209 located in the same circumferential direction is five, and the stop cams 1209 in different circumferential directions are arranged in the vertical direction, such as Figure 11 As shown, from top to bottom, the lengths of the five retaining protrusions 1209 on the same axis decrease sequentially. Correspondingly, from top to bottom, the initial extension lengths of the five second sliders 1202 on different limiting rings 5 ​​located on the same axis increase sequentially. As a result, during the downward movement of the spray rack 4, under the action of the elastic damper 1206, when the second slider 1202 slowly moves outward, it avoids the stop engagement with the other retaining protrusions 1209, causing the second slider 1202 to be pushed back to its original position again, affecting the extension of the second slider 1202. At the same time, it avoids vibration caused by the stop engagement with the other retaining protrusions 1209, which affects the stability of the movement of the spray rack 4. In addition, the lower end surface of the inner end of the retaining protrusion 1209 is configured as an inclined surface, thereby forming an inclined guide engagement with the outer end of the second slider 1202. As a result, during the upward movement of the spray rack 4, when the retaining protrusion 1209 abuts the second slider 1202, the second slider 1202 can move inward under the action of the inclined surface to achieve reset.

[0056] It should be noted that under the action of the elastic damper 1206, when the second slider 1202 moves slowly outward, the second slider 1202 will approach the limit position before the spray rack 4 reaches the bottom, thereby reducing the wear on the sling 3 caused by the continuous compression of the second elastic member 1204 due to the continuous outward movement of the second slider 1202 through the transmission of the second rack 1207, the gear 1208 and the first rack 1205, and the continuous increase in the clamping force between the ratchet 11 and the sling 3.

[0057] It should also be noted that, when the spray rack 4 reaches the bottom, the second slider 1202 moves outward to the extreme position, at which time the pressing force between the ratchet 11 and the sling 3 reaches the maximum; in the process of the spray rack 4 moving upward, the ridges and the ratchet teeth are locked, the ratchet 11 cannot rotate and locks the sling 3 through friction, at this time the limit ring 5 and the sling 3 form a relatively static state, completely eliminating the sliding friction between the two and fundamentally avoiding wear; when the spray rack 4 moves to the point where the second slider 1202 abuts against the stop ridge 1209, as the spray rack 4 continues to move, under the action of the inclined surface, the second slider 120 2 is pushed inward to the initial position; when the second slider 1202 moves inward, the second slider 1202 synchronously drives the second rack 1207 to move inward, and the second rack 1207 drives the gear 1208 to rotate by meshing with the gear 1208, and the gear 1208 drives the first rack 1205 to move outward by meshing with the first rack 1205, and the first rack 1205 synchronously drives the first slider 1201 to move outward, thereby releasing the second elastic member 1204, and the elastic force of the second elastic member 1204 is reduced, thereby reducing the pressing force between the ratchet 11 and the sling 3.

[0058] In other embodiments, in order to improve the adaptability of the concrete curing device for bridge pier construction to complex environments, it is configured that each limit ring 5 can be connected to the frame 1 through a limit assembly 13, and the limit assembly 13 is configured to limit the position of the limit ring 5 on the frame 1; the concrete curing device for bridge pier construction is configured to have a first curing mode and a second curing mode, and the concrete curing device for bridge pier construction is configured to also include an adjustment mechanism, and the adjustment mechanism is configured to be able to adjust the curing mode of the concrete curing device for bridge pier construction. In this way, when the wind level in the environment where the pier 14 is located is less than the preset wind level, the regulating mechanism adjusts the concrete curing device for bridge pier construction to the first curing mode. At this time, under the action of the limiting assembly 13, the limiting ring 5 is released in sequence from bottom to top, so that from bottom to top, the time for the limiting ring 5 to remain stationary increases in sequence and the time for it to remain free decreases in sequence. When the limiting ring 5 remains stationary, only the sling 3 moves. At this time, there is almost no wear between the limiting ring 5 and the sling 3. When the limiting ring 5 remains free, under the action of wind or the vibration of the sling 3, the limiting ring 5 and the sling 3 are in contact. Wear will occur. By adjusting the time that the limit ring 5 remains stationary and the time that it remains free, the wear of the limit ring 5 and its components and the sling 3 can be reduced, thereby increasing the service life of the limit ring 5 and its components and the sling 3; when the wind level in the environment where the pier 14 is located is greater than the preset wind level, the adjustment mechanism adjusts the concrete curing device for bridge pier construction to the second curing mode. At this time, the limit assembly 13 fails, and the limit ring 5 is released synchronously, so that all the limit rings 5 ​​move downward with the sling 3, thereby limiting the sling 3, which is beneficial to improving the stability during spraying.

[0059] Specifically, the limiting assembly 13 is configured to include a fixed block 1301 and a spring slider group. A plurality of fixed blocks 1301 are circumferentially arranged on the outer wall of each limiting ring 5; illustratively, five fixed blocks 1301 can be provided on each limiting ring 5, and the five fixed blocks 1301 are evenly arranged along the circumference. When the number of limiting rings 5 ​​is set to five, five spring slider groups are provided on the frame 1, and the five spring slider groups are arranged in the vertical direction; when the number of fixed blocks 1301 provided on each limiting ring 5 is set to five, each spring slider group includes five spring sliders 1302, and the spring sliders 1302 and the fixed blocks 1301 are correspondingly provided. The spring slider 1302 is composed of a compression spring and a slider. The compression spring is connected between the slider and the frame 1. Under the action of the compression spring, the slider has a tendency to move inward in the radial direction of the limiting ring 5, so that it can form a stop fit with the fixed block 1301 to limit the position of the limiting ring 5 on the frame 1. As shown Figure 9As shown, from top to bottom, the five spring sliders 1302 in the same row are staggered along the circumferential direction. Correspondingly, from top to bottom, the five fixed blocks 1301 in the same row on different limit rings 5 ​​are staggered along the circumferential direction. Therefore, when the spray rack 4 moves downward, the fixed blocks 1301 will only engage with the spring sliders 1302 in the corresponding position to prevent vibration caused by engagement with other spring sliders 1302, which would affect the stability of the spray rack 4 during movement. In addition, the upper and lower end surfaces of the outer ends of the fixed blocks 1301 are both configured as inclined surfaces, and the upper and lower end surfaces of the inner ends of the slider are both configured as inclined surfaces, thereby forming an inclined guide engagement. When the fixed blocks 1301 and the slider abut, the inclined surfaces can enable the fixed blocks 1301 to move downward or upward over the slider.

[0060] When the concrete curing device for bridge pier construction is in the first curing mode, the limiting ring 5 is stopped at the top of the spring slider 1302 by the fixed block 1301; in the process of the spray frame 4 moving downward, the spray frame 4 first stretches all the first elastic members 6 between the spray frame 4 and the limiting ring 5 at the bottom, so that the resultant force on the limiting ring 5 at the bottom is downward and gradually increases. When the spray frame 4 moves to the guide rope 7 thereon and the T-shaped countersunk hole stop on the limiting ring 5 at the bottom, the spray frame 4 is synchronously It drives the limiting ring 5 at the bottom to move downward. At this time, the fixed block 1301 on the limiting ring 5 at the bottom moves downward over the spring slider 1302, and then moves downward to a position close to the spray rack 4 and the middle of the upper limiting ring 5 under the action of the first elastic member 6 on the upper and lower sides of the limiting ring 5; as the spray rack 4 moves, when the limiting ring 5 at the bottom moves to the guide rope 7 thereon and the T-shaped countersunk stop on the upper limiting ring 5, the above process is repeated, thereby realizing the release of the limiting ring 5 from bottom to top in sequence.

[0061] When the concrete curing device for bridge pier construction is in the second curing mode, under the action of the adjustment mechanism, all the spring sliders 1302 are driven to move outward, so that they are disengaged from the fixed block 1301. At this time, all the limit rings 5 ​​lose the restriction of the spring sliders 1302, thereby achieving the synchronous release of all the limit rings 5.

[0062] Specifically, the adjustment mechanism includes a wind sensor, a driver, and a controller. The wind sensor is mounted on the frame 1 and configured to sense the wind level in the environment surrounding the pier 14. Exemplarily, the wind sensor can be a three-cup wind speed sensor. The frame 1 is provided with multiple drivers, corresponding to the spring slider 1302. The drivers are configured to drive the spring slider 1302 to slide radially along the retaining ring 5. Exemplarily, the driver can be a drive cylinder mounted on the frame 1, with an output shaft positioned radially inwardly of the retaining ring 5 and secured to the slider. Thus, when the concrete curing device for bridge pier construction is in the second curing mode, the slider can be driven outward, disengaging the spring slider 1302 from the fixed block 1301. At this point, all retaining rings 5 ​​are freed from the restraint of the spring slider 1302, thereby achieving simultaneous release of all retaining rings 5. The controller is electrically connected to the wind sensor and the driving element at the same time, and is configured to receive the signal sent by the wind sensor, process the signal, and then send a start / stop instruction to the driving element.

[0063] It is understandable that the wind sensor can also be set as any one of an ultrasonic wind speed sensor, a pitot tube wind speed sensor, a thermal wind speed sensor, an acoustic wind speed sensor, a pressure wind speed sensor, and a photoelectric wind speed sensor; of course, the wind sensor can also be set as any combination of the above.

[0064] It is understandable that the driving cylinder can be configured as any one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0065] In other embodiments, the driving member may also be configured as an electromagnet.

Claims

1. A concrete curing device for bridge pier construction, characterized in that: The concrete curing device for bridge pier construction includes a frame, which is arranged on the top of the pier; a plurality of winches are circumferentially arranged on the frame; a sling is wound on each of the winches, and the free ends of all the slings are commonly connected to a spray rack, which can slide in a vertical direction under the drive of the slings and is configured to spray the pier; a plurality of limiting rings are commonly sleeved on all the slings, and the plurality of limiting rings are arranged in a vertical direction; a plurality of first elastic members are circumferentially connected between adjacent limiting rings, between the limiting ring located at the top and the frame, and between the limiting ring located at the bottom and the spray rack; On each of the limiting rings, a mounting ring is provided at a position connected to the sling, and the mounting ring is sleeved on the outer circumference of the sling; two elastic top rings are axially inserted in each of the mounting rings, and the elastic top rings are sleeved on the outer circumference of the sling and can be in frictional contact with the sling; a guide assembly is provided in each of the mounting rings, and the guide assembly is configured to drive the elastic top ring located below to contract inward and clamp the sling when the sling is in frictional contact with the elastic top ring located above; The guide assembly includes an iris ring, each of the mounting rings is inserted into the iris ring, the iris ring is arranged above the elastic top ring located above and is capable of rotating around its own axis; each of the iris rings is circumferentially provided with a plurality of guide arc grooves; the elastic top ring located above is circumferentially provided with a plurality of guide protrusions, the guide protrusions being slidably inserted into the guide arc grooves; a plurality of rotating rods are circumferentially provided on the inner circumferential wall of each mounting ring, the middle portion of the rotating rod is hinged to the mounting ring, the rotating rod is located between the two elastic top rings, and the two ends are respectively hinged to the two elastic top rings; Each of the limiting rings can be connected to the frame via a limiting assembly, and the limiting assembly is configured to limit the position of the limiting ring on the frame; The limiting assembly includes a fixed block and a spring slider group, and multiple fixed blocks are circumferentially arranged on the outer wall of each limiting ring; multiple spring slider groups are arranged on the frame, and multiple spring slider groups are arranged in the vertical direction. Each spring slider group includes multiple spring sliders, and multiple spring sliders are arranged circumferentially.

2. The concrete curing device for bridge pier construction according to claim 1, characterized in that: The top of the spray rack and the tops of all the limiting rings except the limiting ring located at the top are provided with a plurality of guide ropes along the circumferential direction, and the guide ropes extend in the vertical direction. The guide ropes slide through the limiting ring located at the bottom or the limiting ring located above the adjacent limiting rings, and can form a stop fit with the limiting ring located at the bottom or the limiting ring located above the adjacent limiting rings.

3. The concrete curing device for bridge pier construction according to claim 1, characterized in that: The distance between the hinge point of the rotating rod on the elastic top ring located above and the hinge point of the rotating rod on the mounting ring is greater than the distance between the hinge point of the rotating rod on the elastic top ring located below and the hinge point of the rotating rod on the mounting ring.

4. The concrete curing device for bridge pier construction according to claim 1, characterized in that: A ratchet is provided on each of the limiting rings at the position connected to the sling. The ratchet can rotate in one direction and slide in the radial direction of the limiting ring, and is configured to be frictionally locked on the sling when the sling moves upward relative to the limiting ring; each of the ratchet wheels is connected to the limiting ring through a control component, and the control component is configured to change the clamping force between the ratchet wheel and the sling.

5. The concrete curing device for bridge pier construction according to claim 4, characterized in that: The control component includes a first slider, a second slider and a stop cam, and the ratchet is hingedly connected to the first slider, and the first slider, the second slider and the third slider are all located in the limiting ring and can slide along the radial direction of the limiting ring; the first slider is connected to the third slider through a second elastic member, and under the action of the second elastic member, the first slider and the third slider have a tendency to move away from each other; a first rack is fixedly provided on the first slider, and the first rack extends along the radial direction of the limiting ring; the second slider is connected to the limiting ring through an elastic damper, and under the action of the elastic damper, the second slider has a tendency to move slowly outward; a second rack is fixedly provided on the second slider, and the second rack extends along the radial direction of the limiting ring, and is spaced apart from the first rack in the vertical direction; a gear is meshed between the first rack and the second rack, and the gear can rotate around its own axis; the stop cam is provided on the frame and can form a stop fit with the second slider.

6. The concrete curing device for bridge pier construction according to claim 1, characterized in that: The concrete curing device for bridge pier construction is configured to have a first curing mode and a second curing mode. When the wind level in the environment where the pier is located is less than a preset wind level, the concrete curing device for bridge pier construction is in the first curing mode, and under the action of the limiting assembly, the limiting rings are released sequentially from bottom to top; when the wind level in the environment where the pier is located is greater than or equal to the preset wind level, the concrete curing device for bridge pier construction is in the second curing mode, the limiting assembly fails, and all the limiting rings are released synchronously; the concrete curing device for bridge pier construction also includes an adjustment mechanism, which is configured to be able to adjust the curing mode of the concrete curing device for bridge pier construction.

7. The concrete curing device for bridge pier construction according to claim 6, characterized in that: The spring slider can slide elastically along the radial direction of the limiting ring and can form a stop fit with the fixing block.

8. The concrete curing device for bridge pier construction according to claim 7, characterized in that: The adjustment mechanism includes a wind sensor, a driving member and a controller. The wind sensor is arranged on the frame and is configured to sense the wind level in the environment where the pier is located; a plurality of driving members are arranged on the frame, and the driving members and the spring slider are arranged correspondingly, and the driving members are configured to drive the spring slider to slide along the radial direction of the limit ring; the controller is electrically connected to the wind sensor and the driving member at the same time, and is configured to receive the signal sent by the wind sensor, and after processing it, send a start-stop instruction to the driving member.

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