A reinforcing bar lowering device and a lowering method

Abstract

The present application relates to the technical field of power transmission line engineering, and particularly relates to a reinforcing steel bar lowering device and a lowering method, the reinforcing steel bar lowering device comprising a base, a rotating seat, a reinforcing steel bar sleeve and an actuator; the rotating seat is rotationally connected with the base and is provided with a rotating power source, and the rotating seat has a rotatable angle of at least 90 degrees relative to the base; the reinforcing steel bar sleeve is connected with the base; the actuator is arranged on the rotating seat and is located at the end of the reinforcing steel bar sleeve, and the actuator is used to cooperate with the reinforcing steel bar to drive or intermittently brake the reinforcing steel bar in the axial direction of the reinforcing steel bar sleeve. The present application can avoid manual lowering operation of the reinforcing steel bar, thereby greatly reducing the labor intensity and operation difficulty of the staff, and can avoid a series of problems caused by free falling of the reinforcing steel bar due to manual lowering.

Description

Technical Field

[0001] This invention relates to the field of power transmission line engineering technology, and more specifically, to a rebar lowering device and method. Background Technology

[0002] In the reinforcement cage installation stage of transmission line foundation construction, if a crane can reach the tower location, the pre-fabricated reinforcement cage is typically lifted by the crane and placed into the foundation pit. If a crane cannot reach the tower location, the main reinforcement bars and stirrups of the reinforcement cage are usually placed into the foundation pit, and construction workers go down to the bottom of the pit to tie the reinforcement cage from bottom to top. Currently, for situations where a crane cannot reach the tower location, the main reinforcement bars are mainly erected manually and then lowered into the pit. Because the main reinforcement bars are long and heavy, relying solely on manual labor for erecting and lowering them is difficult, labor-intensive, requires a large number of workers, and has low work efficiency. Furthermore, the reinforcement bars are prone to bending during the erection process, making the operation quite challenging.

[0003] Meanwhile, when the main reinforcement bars are lowered manually, they are prone to slipping out of control and falling freely. When the bars come into contact with the pit wall, they may cause damage to the pit wall or even collapse, posing a safety hazard. Furthermore, the bars have a large inertia when falling and may become stuck at the bottom of the pit, making them difficult to pull out and increasing the handling process. Summary of the Invention

[0004] This invention provides a rebar lowering device and method. By restricting the degree of freedom of the rebar in the circumferential direction and adjusting the posture of the rebar, the lowering of the rebar is controlled by an actuator, thereby realizing the non-manual operation of lowering the rebar and overcoming the technical problems mentioned in the background art caused by manual lowering of rebar.

[0005] This invention is achieved through the following technical solution:

[0006] In a first aspect, this application provides a rebar lowering device, which includes:

[0007] Base;

[0008] A rotating seat, which is rotatably connected to the base and is equipped with a rotational power source, wherein the rotating seat has a rotational angle of at least 90° relative to the base;

[0009] A reinforcing bar sleeve, which is connected to the rotating seat;

[0010] An actuator, which is disposed on the rotating seat and located at the end of the rebar sleeve, is used to cooperate with the rebar to intermittently brake or drive the rebar in the axial direction of the rebar sleeve.

[0011] In some embodiments of the first aspect, the number of steel bar sleeves is multiple and they are arranged at intervals, and the axial directions of all steel bar sleeves coincide.

[0012] An actuator is installed between every two steel rebar sleeves.

[0013] In some embodiments of the first aspect, the actuator includes:

[0014] A movable base, which is movably connected to the rotating seat;

[0015] An actuator, which is disposed on the active base;

[0016] An actuating power source is connected to the movable base to drive the movable base to move relative to the rotating seat;

[0017] When the movable base is in an active state driven by the power source, the actuator moves with the movable base to drive or intermittently brake the steel bar.

[0018] In some embodiments of the first aspect, the movable base is rotatably connected to the rotating seat and the actuating power source is used to drive the movable base to rotate;

[0019] It also includes a clamping member, which is elastically slidably disposed on the rotating seat and has a sliding tendency to approach the actuator, and a clamping gap is formed between the clamping member and the actuator for clamping the reinforcing bar.

[0020] In some embodiments of the first aspect, the number of actuators is multiple and they are arranged circumferentially on the movable base so that the multiple actuators sequentially and continuously abut against the reinforcing bars when the movable base rotates.

[0021] In some embodiments of the first aspect, a movable connector is included, the clamping member is connected to the movable connector, and the movable connector is slidably connected to the rotating seat;

[0022] The movable connector has a slotted hole, and the rotating seat has a pin that matches the slotted hole. The slotted hole is fitted onto the pin. A screw is movably inserted through the movable connector. One end of the screw is connected to the movable connector through an elastic element, and the other end is threaded to the rotating seat. The movable connector has a sliding tendency relative to the rotating seat under the elastic action of the elastic element.

[0023] In some embodiments of the first aspect, the clamping member is rotatably connected to the movable connector.

[0024] In some embodiments of the first aspect, the base is configured with a counterweight bar.

[0025] In some embodiments of the first aspect, the counterweight rod is rotatably connected to the base.

[0026] Secondly, this application provides a method for lowering reinforcing bars, which includes the following steps:

[0027] To ensure proper fit between the reinforcing bars and the reinforcing bar sleeves, and to ensure proper fit between the actuator and the reinforcing bars;

[0028] Start the rotational power source to rotate the rotating seat relative to the base until the rotating seat is perpendicular to the base;

[0029] The actuator is activated to intermittently brake the reinforcing bars in the reinforcing bar sleeve.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0031] This invention provides a rebar lowering device and method. The device uses a rebar sleeve to limit the circumferential movement of the rebar, preventing bending and maintaining its straightness. Then, the rotation of a rotating seat adjusts the rebar's posture, ensuring it remains upright. Finally, an actuator intermittently brakes the rebar, allowing it to be lowered under its own weight or driven by the actuator. Compared to manual lowering, the rebar's weight is overcome by the actuator, significantly reducing manual labor intensity. Furthermore, the intermittent braking or driving action of the actuator makes the rebar easier to control, preventing continuous free fall and thus avoiding collisions with the pit walls or insertion into the pit bottom. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the lowering device before lowering the reinforcing bars, provided in an embodiment of the present invention.

[0034] Figure 2 This is a structural diagram of the lowering device provided in an embodiment of the present invention when lowering reinforcing bars;

[0035] Figure 3 This is a schematic diagram of the actuator provided in an embodiment of the present invention.

[0036] The attached diagram shows the markings and corresponding component names:

[0037] 1-Base, 2-Rotating seat, 3-Rebar sleeve, 4-Rebar, 5-Actuating mechanism, 51-Clamping protrusion, 52-Actuating component, 53-Modible base, 54-Clamping component, 55-Modible connecting component, 56-Fixed connecting component, 57-Screw, 58-Elastic component, 6-Counterweight rod, 7-Rotation power source. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0039] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0040] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] In the description of this invention, the terms "front," "rear," "left," "right," "up," "down," "vertical," "horizontal," "high," "low," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0042] like Figures 1-3As shown, in a first aspect, embodiments of the present invention provide a rebar 4 lowering device, which includes a base 1, a rotating seat 2, a rebar sleeve 3, and an actuator 5; the rotating seat 2 is rotatably connected to the base 1 and is equipped with a rotational power source 7, and the rotating seat 2 has a rotational angle of at least 90° relative to the base 1; the rebar sleeve 3 is connected to the base 1; the actuator 5 is disposed on the rotating seat 2 and located at the end of the rebar sleeve 3, and the actuator 5 is used to cooperate with the rebar 4 to intermittently brake or drive the rebar 4 in the axial direction of the rebar sleeve 3.

[0043] In practice, the base 1 can be made of aluminum alloy profiles. For example, the base 1 can be a rectangular shape composed of several aluminum alloy profiles. Multiple aluminum alloy profiles can be connected between the two long sides of the base 1 to ensure its structural strength. The rotating seat 2 can also be made of aluminum alloy profiles. For example, the rotating seat 2 can also be a rectangular shape composed of several aluminum alloy profiles. The rotating seat 2 and the base 1 can have the same shape and size. Multiple aluminum alloy profiles can also be connected between the two long sides of the rotating seat 2 to ensure its structural strength. One short side of the rotating seat 2 is rotatably connected to one short side of the base 1. For example, two fixed supports can be spaced apart on the short side of the base 1, and two movable supports can be spaced apart on the short side of the rotating seat 2. Both the fixed and movable supports have rotation holes. By connecting the fixed and movable supports in series with a rotating shaft, the rotatable connection between the rotating seat 2 and the base 1 can be achieved. Bearings can be installed in the rotation holes of the movable supports to prevent relative wear between the movable supports and the rotating shaft during the rotation of the rotating seat 2. The rotational power source 7 between the rotating seat 2 and the base 1 can be configured as an electric actuator. The movable end of the electric actuator is rotatably connected to the rotating seat 2, and the fixed end of the electric actuator is rotatably connected to the base 1. By controlling the length of the electric actuator, the angle between the rotating seat 2 and the base 1 can be controlled. It can be understood that when the electric actuator reaches its maximum stroke, the angle between the rotating seat 2 and the base 1 is greater than 90°, that is, the rotatable angle of the rotating seat 2 is greater than 90°. The diameter of the rebar sleeve 3 is larger than the diameter of the largest specification rebar 4. The rebar sleeve 3 can be fixedly mounted on the rotating seat 2, and the axis of the rebar sleeve 3 is parallel to the long side of the rotating seat 2. The actuator 5 is located on one side of the axial end of the rebar sleeve 3. The braking method of the actuator 5 for the rebar 4 is not limited to clamping, pressing, magnetic attraction, etc. When the actuator 5 performs the braking action, it can be executed automatically or manually. Of course, in order to minimize the intensity of manual labor, the actuator 5 can be an electrically driven actuator 5. For example, in some implementation scenarios, the actuator 5 can be configured as a gripper driven by a motor. By intermittently controlling the motor to rotate forward and backward, the gripper can intermittently clamp the rebar 4, so that the rebar 4 can be intermittently braked. During the interval between two braking actions, the rebar 4 can be lowered by its own gravity. By controlling the interval between the two braking actions, the lowering speed of the rebar 4 can be controlled.The actuator 5 can also drive the reinforcing bar 4, that is, the reinforcing bar 4 is lowered under the drive of the actuator 5. The lowering speed and distance of the reinforcing bar 4 depend entirely on the output power and working time of the actuator 5. For example, the actuator 5 can be set as two controlled back-and-forth sliding jaws. The sliding direction of the jaws is parallel to the axis of the reinforcing bar 4. One jaw holds the reinforcing bar 4 and slides in a controlled manner, so the reinforcing bar 4 can be driven to be lowered. After the reinforcing bar 4 reaches a certain lowering distance, the other jaw holds the reinforcing bar 4 while the other jaw releases the reinforcing bar 4. The reinforcing bar 4 is then lowered by the other jaw, and so on.

[0044] When lowering the reinforcing bar 4, it is first inserted into the reinforcing bar sleeve 3. Since the diameter of the reinforcing bar sleeve 3 is larger than the diameter of the reinforcing bar 4, the reinforcing bar 4 can move freely along its axial direction within the sleeve 3. Simultaneously, the actuator 5 works in conjunction with the reinforcing bar 4 to brake it. Under the braking action of the actuator 5, the reinforcing bar 4 cannot move along its own axial direction. The electric push rod is activated, causing the rotating seat 2 to rotate relative to the base 1 until the angle between the rotating seat 2 and the base 1 is 90°. At this point, the reinforcing bar 4 is basically in a vertical position. Finally, the actuator 5 is activated to intermittently brake the reinforcing bar 4. During the interval between two adjacent braking actions, the reinforcing bar 4 can fall freely under its own weight, thus lowering it. The lowering distance of the reinforcing bar 4 can be adjusted by changing the total number of braking actions of the actuator 5. Alternatively, the actuator 5 can be activated to make the reinforcing bar 4 slide within the sleeve 3. By adjusting the output power and working time of the actuator 5, the lowering speed and distance of the reinforcing bar 4 can be controlled.

[0045] It is understandable that when the actuator 5 applies a braking effect to the steel bar 4, and the steel bar 4 is lowered by its own weight, the movement of the steel bar 4 is a step-like movement; when the actuator 5 applies a driving effect to the steel bar 4, the movement state of the steel bar 4 at each moment is controlled by the actuator 5, and when the actuator 5 works continuously, the movement of the steel bar 4 is a continuous movement.

[0046] The reinforcing bar 4 itself has a certain rigidity. When the length of the reinforcing bar 4 exposed outside the reinforcing bar sleeve 3 is short, the reinforcing bar 4 will not bend. Therefore, the length of the reinforcing bar sleeve 3 does not need to be set to be basically consistent with the length of the reinforcing bar 4. That is, in some embodiments, there are multiple reinforcing bar sleeves 3 and they are arranged at intervals. The axial direction of all reinforcing bar sleeves 3 coincides. An actuator 5 is provided between every two reinforcing bar sleeves 3.

[0047] In this embodiment, by controlling the number of rebar sleeves 3, the total length of the rebar sleeves 3 is controlled, thus reducing material usage. Simultaneously, the reduced total length of the rebar sleeves 3 decreases the overall weight of the rotating seat 2, thereby reducing the driving load on the rotational power source 7. Furthermore, the actuator 5 positioned between every two rebar sleeves 3 allows for multiple braking or driving actions on the rebar 4. That is, multiple parts of the rebar 4 are limited or driven by the actuator 5 along its axial direction, ensuring greater stability of the rebar 4 during lowering and thus guaranteeing accurate lowering direction.

[0048] As one embodiment of the actuator 5, the actuator 5 may include a movable base 53, an actuator 52, and an actuator power source; the movable base 53 is movably connected to the rotating seat 2; the actuator 52 is disposed on the movable base 53; the actuator power source is connected to the movable base 53 to drive the movable base 53 to move relative to the rotating seat 2; wherein, when the movable base 53 is in an active state driven by the actuator power source, the actuator 52 moves with the movable base 53 to drive or intermittently brake the reinforcing bar 4.

[0049] In practice, when the actuator 52 comes into contact with the reinforcing bar 4, the reinforcing bar 4 can be pressed tightly against the reinforcing bar sleeve 3. In other words, when the actuator 52 brakes the reinforcing bar 4, the actuator 52 and the reinforcing bar sleeve 3 essentially form a clamping effect on the reinforcing bar 4, thereby achieving braking of the reinforcing bar 4. It should be noted that if the actuator 5 drives the reinforcing bar 4, the actuator 52 here can be a friction ring that is controlled to rotate on the movable base 53. Of course, at the moment when the actuator 52 brakes the reinforcing bar 4, the reinforcing bar 4 may wear down the inner wall of the reinforcing bar sleeve 3 due to inertia. Therefore, a clamping element 54 can be additionally provided on the rotating seat 2 to clamp the reinforcing bar 4 together with the actuator 52. For example, in some embodiments, the clamping member 54 is elastically slidably disposed on the rotating seat 2, and based on this elastic sliding arrangement, the clamping member 54 has a sliding tendency to approach the actuator 52, forming a clamping gap between the clamping member 54 and the actuator 52 for clamping the reinforcing bar 4; the movable base 53 is rotatably connected to the rotating seat 2 and the actuation power source is configured as a rotational power source, that is, the actuation power source drives the movable base 53 to rotate. The initial distance between the clamping member 54 and the actuator 52 is small, which can be less than the smallest diameter of the reinforcing bar 4. When the reinforcing bar 4 is between the actuator 52 and the clamping member 54, the clamping member 54 provides clamping force to the reinforcing bar 4 through the elastic sliding tendency; at the same time, the elastic sliding arrangement of the clamping member 54 on the rotating seat 2 makes the clamping gap between the clamping member 54 and the actuator 52 passively adjustable, that is, the clamping member 54 and the actuator 52 can provide clamping force for reinforcing bars 4 of different diameters. The clamping member 54 adopts an elastic sliding setting, which makes it less likely for the reinforcing bar 4 to get stuck when the actuator 52 drives the reinforcing bar 4, and allows the reinforcing bar 4 to move more smoothly during the driving process.

[0050] When the actuator 52 releases the brake on the reinforcing bar 4, the reinforcing bar 4 will be subjected to a unidirectional holding force from the clamping member 54, meaning the reinforcing bar 4 will be pushed away from the clamping position. When the actuator 52 re-brakes the reinforcing bar 4, it will push the reinforcing bar 4 back to the clamping position. This will cause the reinforcing bar 4 to swing slightly during the lowering process, which is not conducive to the positioning of the reinforcing bar 4 in the pit. Therefore, in some embodiments, there are multiple actuators 52 arranged circumferentially on the movable base 53 so that multiple actuators 52 alternately contact the reinforcing bar 4 when the movable base 53 rotates. That is, the arrangement of multiple actuators 52 can reduce the braking interval, thereby reducing the swing amplitude of the reinforcing bar 4.

[0051] In this embodiment, as the number of actuators 52 increases, the number of times the reinforcing bar 4 is braked during one rotation of the movable base 53 is increased. That is, the distance between the reinforcing bar 4 and the clamping position by the clamping member 54 is shorter, thus reducing the swing amplitude of the reinforcing bar 4. When the number of actuators 52 reaches a certain level, the time interval between two braking of the reinforcing bar 4 can approach zero. During this period, the distance the reinforcing bar 4 falls freely due to gravity also approaches zero. That is, when the previous actuator 52 disengages from the reinforcing bar 4, the next actuator 52 contacts the reinforcing bar 4. As the movable base 53 rotates, the reinforcing bar 4 is driven down by the actuator 52. That is, at this time, the reinforcing bar 4 is driven down by the actuator 5. During the rotation of the movable base 53, due to the contact pressure between the actuator 52 and the reinforcing bar 4, the reinforcing bar 4 is passively lowered by the frictional force from the actuator 52 when the actuator 52 rotates with the movable base 53. This configuration allows for complete control over the lowering speed of the reinforcing bar 4. By adjusting the rotational speed of the movable base 53, the lowering speed of the reinforcing bar 4 can be adjusted. Furthermore, throughout the lowering process, the reinforcing bar 4 is essentially continuously braked, resulting in a more stable posture and reducing the likelihood of continuous freefall. Simultaneously, when the reverse-drive power source causes the movable base 53 to rotate in the opposite direction, the reinforcing bar 4 can also be lifted. Therefore, if repositioning of the reinforcing bar 4 is needed midway through its lowering process, it can be lifted, the position of the lowering device adjusted, and the lowering process restarted without needing to adjust the positions of other structures in the pit to avoid the already lowered portion of the reinforcing bar 4.

[0052] It should be noted that the clamping force of the clamping member 54 and the actuating member 52 on the reinforcing bar 4 is the same. Therefore, the friction coefficient between the clamping member 54 and the reinforcing bar 4 can be set to be less than the friction coefficient between the actuating member 52 and the reinforcing bar 4. For example, the contact part between the clamping member 54 and the reinforcing bar 4 can be a large and smooth plane.

[0053] In some implementations, such as Figure 3As shown, the clamping member 54 can be connected to the rotating seat 2 via a movable connecting member 55, and the movable connecting member 55 and the rotating seat 2 are slidably connected. The movable connecting member 55 has a slotted hole, and the rotating seat 2 has a pin that matches the slotted hole, with the slotted hole fitted onto the pin. A screw 57 is movably inserted through the movable connecting member 55. One end of the screw 57 is connected to the movable connecting member 55 via an elastic element 58, and the other end is threaded to the rotating seat 2. Under the elastic action of the elastic element 58, the movable connecting member 55 has an elastic sliding tendency relative to the rotating seat 2. When it is necessary to lower steel bars 4 of different diameters, the distance between one end of the screw 57 and the movable connecting member 55 can be decreased or increased by rotating the screw 57. In this way, the elastic element 58 can store or release a certain amount of elastic potential energy, and different clamping forces can be formed between the clamping member 54 and the actuating member 52, thereby ensuring that steel bars 4 of different diameters can be stably clamped in the clamping gap. In specific implementation, the movable connector 55 can be connected to the rotating seat 2 via the fixed connector 56; both the movable connector 55 and the fixed connector 56 are constructed as L-shaped plates, the longer plate segment of the fixed connector 56 is fixedly connected to the rotating seat 2 by bolts, the movable base 53 is rotatably connected to the longer plate segment of the fixed connector 56, and four pins are set on the longer plate segment of the fixed connector 56 in a rectangular arrangement; the longer plate segments of the movable connector 55 and the longer plate segments of the fixed connector 56 are stacked, and the movable connector 55 is provided with four slots corresponding to the pins; the screw 57 continuously passes through the shorter plate segment of the movable connector 55 and the shorter plate segment of the fixed connector 56, and a spring is sleeved on the shaft segment between the screw 57 and the movable connector 55, and nuts are threaded onto the shaft segments of the screw 57 on both sides of the shorter plate segment of the fixed connector 56.

[0054] The surface of the reinforcing bar 4 is usually quite rough. When the clamping member 54 continuously holds the reinforcing bar 4 at the same location, significant wear will occur at that location during the lowering process of the reinforcing bar 4. As the usage time increases, the structural precision of the clamping member 54 itself will be significantly affected, thereby reducing the clamping effect of the clamping member 54 and the actuator 52 on the reinforcing bar 4. At the same time, when the actuator 5 drives the reinforcing bar 4, the friction between the clamping member 54 and the reinforcing bar 4 will also become a resistance, hindering the movement of the reinforcing bar 4. Therefore, in some embodiments, the clamping member 54 is rotatably connected to the movable connecting member 55. In specific implementations, multiple clamping protrusions 51 can be provided on the clamping member 54. The specific arrangement of the clamping protrusions 51 can refer to the arrangement of the actuator 52 on the movable base 53, that is, the overall configuration of the clamping member 54 is the same as the overall configuration formed by the movable base 53 and the actuator 52. Preferably, the clamping member 54 can be configured as a ratchet shape, and the movable base 53 and the actuator 52 can jointly form a ratchet shape, that is, the movable base 53 and the actuator 52 are integrally formed structures.

[0055] In some embodiments, the base 1 is equipped with a counterweight rod 6. Specifically, the counterweight rod 6 can be connected to the long side of the base 1, and the number of counterweight rods 6 can be set to multiple. After the position of the lowering device on the ground is adjusted, other heavy objects can be pressed on the counterweight rod 6, thereby stabilizing the overall posture of the lowering device.

[0056] In some embodiments, the counterweight 6 can be rotatably connected to the base 1. For example, when the counterweight 6 is connected to the long side of the base 1, the counterweight 6 can be rotated so that its length direction is parallel to the long side. This reduces the overall space occupied by the lowering device and facilitates storage and transportation.

[0057] Secondly, embodiments of the present invention provide a method for lowering reinforcing bar 4, the method comprising the following steps:

[0058] S1. Make the reinforcing bar 4 and the reinforcing bar sleeve 3 cooperate and make the actuator 5 cooperate with the reinforcing bar 4.

[0059] Specifically, first, level the area around the pit, and then place the rebar 4 lowering device at a suitable position near the pit opening. Rotate the counterweight rod 6 on the base 1 to open it outwards. Place locally sourced soil or stones in bags on the counterweight rod 6 to ensure the stability of the device. Rotate the nut on the clamping member 54 so that the distance between the clamping member 54 and the actuator 52 is adapted to the diameter of the rebar 4 to be lowered. Pass the rebar 4 through the rebar sleeve 3 and position it between the clamping member 54 and the actuator 52 to ensure the rebar 4 is stably clamped.

[0060] S2. Activate the rotational power source 7 to rotate the rotating seat 2 relative to the base 1 until the rotating seat 2 is perpendicular to the base 1. Figure 2 The state shown.

[0061] S3. Start the actuator 5 to intermittently brake the steel bar 4 in the steel bar sleeve 3.

[0062] After one steel bar 4 is lowered, the rotation power source 7 is activated to rotate the rotating seat 2 relative to the base 1 until the rotating seat 2 is level with the base 1. Figure 1 In the state shown, repeat steps S1 to S3 to lower the next rebar 4.

[0063] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rebar lowering device, characterized in that, include: Base (1); A rotating seat (2) is rotatably connected to the base (1) and is equipped with a rotational power source (7). The rotating seat (2) has a rotational angle of at least 90° relative to the base (1). The reinforcing bar sleeve (3) is connected to the rotating seat (2); An actuator (5) is disposed on the rotating seat (2) and located at the end of the reinforcing bar sleeve (3). The actuator (5) is used to cooperate with the reinforcing bar (4) to intermittently brake or drive the reinforcing bar (4) in the axial direction of the reinforcing bar sleeve (3). The actuator (5) includes: The movable base (53) is rotatably connected to the rotating seat (2); An actuator (52) is disposed on the active base (53); An actuating power source is connected to the movable base (53) to drive the movable base (53) to rotate relative to the rotating seat (2); When the active base (53) is in an active state driven by the power source, the actuator (52) moves with the active base (53) to drive or intermittently brake the steel bar (4); The actuator (5) also includes a clamping member (54), which is elastically slidably disposed on the rotating seat (2) and has a sliding tendency to approach the actuator (52). A clamping gap is formed between the clamping member (54) and the actuator (52) for clamping the reinforcing bar (4). The actuator (5) also includes a movable connector (55), the clamping member (54) is connected to the movable connector (55), and the movable connector (55) is slidably connected to the rotating seat (2); The movable connector (55) is provided with a slot, and the rotating seat (2) is provided with a pin that matches the slot. The slot is fitted onto the pin. A screw (57) is movably inserted through the movable connector (55). One end of the screw (57) is connected to the movable connector (55) through an elastic element (58), and the other end is threaded to the rotating seat (2). The movable connector (55) has a sliding tendency relative to the rotating seat (2) under the elastic action of the elastic element (58).

2. The rebar lowering device according to claim 1, characterized in that, The number of steel bar sleeves (3) is multiple and they are arranged at intervals, and the axial direction of all steel bar sleeves (3) coincides. An actuator (5) is provided between every two steel rebar sleeves (3).

3. The rebar lowering device according to claim 1, characterized in that, The number of actuators (52) is multiple and arranged circumferentially on the movable base (53) so that when the movable base (53) rotates, the multiple actuators (52) and the steel bars (4) successively abut against each other.

4. The rebar lowering device according to claim 1, characterized in that, The clamping member (54) is rotatably connected to the movable connecting member (55).

5. The rebar lowering device according to claim 1, characterized in that, The base (1) is equipped with a counterweight rod (6).

6. The rebar lowering device according to claim 5, characterized in that, The counterweight rod (6) is rotatably connected to the base (1).

7. A method for lowering reinforcing bars, characterized in that, Based on the rebar lowering device according to any one of claims 1 to 6, the process includes the following steps: Make the reinforcing bar (4) and the reinforcing bar sleeve (3) fit together and make the actuator (5) fit together with the reinforcing bar (4); Start the rotational power source (7) to make the rotating seat (2) rotate relative to the base (1) until the rotating seat (2) is perpendicular to the base (1); The actuator (5) is activated to intermittently brake the reinforcing bar (4) in the reinforcing bar sleeve (3).

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