Steel casing burying auxiliary device and method thereof

Abstract

The application relates to the technical field of pile foundation construction, and particularly discloses a steel casing burying auxiliary device and a method thereof, which comprises a flower casing and a casing, the flower casing is installed on a pile driver, the flower casing is driven to move by the pile driver, the inner side of the flower casing is provided with a lifting ring, the lifting ring can move up and down along the inner wall of the flower casing, a containing groove is arranged in the inner side of the lifting ring, the diameter of the containing groove is larger than the outer diameter of a connecting section of the casing, a plurality of groups of connecting assemblies are arranged on the side wall of the flower casing, the limiting columns lock the flower casing and the casing when the flower casing is connected with the casing, the limiting plate and the top plate are matched, and the limiting columns are pulled out when the casing is buried; the steel casing burying auxiliary device and the method thereof can adjust slight deflection when the casing is butt-jointed, the lifting ring can move up and down along the inner wall of the flower casing to play a transition buffering role, and butt joint is realized by matching the containing groove and the lifting ring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pile foundation construction, in particular to a steel casing embedding auxiliary device and a method thereof. BACKGROUND

[0002] In the pile foundation construction of bridges, buildings and other projects, the embedding of the steel casing is a key link. The steel casing not only can accurately position the pile position and guide the drilling tool operation, but also can effectively prevent the collapse of the hole opening and hole wall, avoid slurry leakage, and isolate the water system pressure inside and outside the drilling hole, which plays an important role in ensuring the quality and safety of pile foundation construction.

[0003] In the embedding process of the traditional steel casing embedding method, due to the lack of effective auxiliary positioning means, the construction personnel often need to use tools such as levels to repeatedly measure and adjust, which not only consumes a lot of time and labor, and the work efficiency is extremely low, but also is greatly affected by human factors, and it is difficult to ensure the accuracy and perpendicularity of the embedded position of the steel casing, which is prone to deviation, and thus affects the quality of subsequent pile foundation construction. The existing steel casing embedding auxiliary device has a small application range.

[0004] The Chinese patent application file with publication number CN114753360A discloses a quick connection and separation device for a flower tube and a steel casing and a method thereof, which comprises a tube body, a protective ring, a top plate, a U-shaped groove, a connecting square tube and a pin rod through hole. A device for quick connection and separation of each pin rod at the lower end of the flower tube with each steel casing pin hole at the upper end of the steel casing is arranged on the outer wall of the lower part of the tube body of the flower tube. The quick connection and separation device is composed of a switch rotating disc, an opening hole, a closing inclined plate, a spring chamber, a spring, a pin rod, a switch rod and a pin rod through hole. The method is to complete the connection or separation of the flower tube and the steel casing through the quick connection and separation device. When the flower tube and the steel casing are connected, the butt joint or separation construction process of the two can be completed by manual operation on the ground, the process completion time is short, which is beneficial to speed up the construction progress on site, reduce the number of construction personnel and save time and labor.

[0005] In the related prior art, when embedding the pile foundation casing, the casing needs to be installed at the lower end of the flower tube and connected with the flower tube by using the connecting assembly. The flower tube is installed at the lower end of the pile driver, and the casing needs to be vertical before the flower tube is connected with the casing by moving the pile driver. Since the casing is generally lifted vertically, the verticality of the casing is poor, and the moving accuracy of the pile driver is poor during installation. Therefore, the butt joint of the flower tube and the casing is prone to jamming, and the connecting assembly needs to be operated by workers on the ground. Since the length of the casing is long, the operation of the connecting assembly is difficult. SUMMARY

[0006] This invention provides an auxiliary device and method for installing steel casings, aiming to solve the problems in related technologies where the casing is usually hoisted when vertical, resulting in poor verticality. After the casing is verticalized, the pile driver is moved to connect the casing and the casing. However, due to the poor accuracy of the pile driver's movement, the connection between the casing and the pile driver is prone to jamming. Furthermore, the connecting components require workers to operate on the ground, and the long length of a single casing section makes the operation of the connecting components difficult.

[0007] A steel casing installation auxiliary device includes: a duct and a casing; a lifting ring is provided inside the duct, the lifting ring moves up and down along the inner wall of the duct, and a receiving groove is opened inside the lifting ring, the diameter of the receiving groove being larger than the outer diameter of the casing; an elastic element is provided between the lifting ring and the duct; multiple sets of connecting components are arranged circumferentially on the side wall of the duct, the connecting components including: a limiting post, a top plate, and a limiting plate; the limiting post is perpendicular to the axis of the duct and is close to or far from the axis of the duct; an elastic element is provided between the limiting post and the duct; the limiting plate is vertically arranged and moves up and down along the duct; the top plate is horizontally arranged on the side wall of the duct, the top plate and the limiting plate are L-shaped, and when the limiting plate is at the uppermost end, it can lock the outermost limiting post;

[0008] In the initial state, elastic element one keeps the lifting ring at the bottom, and elastic element two keeps the limiting post closest to the axis of the flower tube. When connected, the protective sleeve abuts against the receiving groove of the lifting ring, and the lifting ring moves upward along the flower tube to the top. The lifting ring squeezes the limiting post so that it abuts against the outer wall of the lifting ring. The lifting ring moves to the top and the limiting post is inserted into the protective sleeve.

[0009] Its effects are as follows: By setting up a receiving groove, it can accommodate a slight deviation of the casing during installation; the lifting ring buffers the transition, reducing jamming caused by deviation between the casing and the tube; the setting of limiting posts and elastic element two enables the limiting posts to automatically insert into the casing, allowing for quick fixation when the casing is connected to the tube, reducing manual operation, lowering the difficulty of long casing construction, and reducing construction safety risks; by setting up multiple sets of connecting components, multiple sides of the casing can be quickly connected; multiple connecting components are adjusted synchronously during casing insertion, making the casing connection more stable; by simplifying the installation process, it eliminates manual leveling and manual operation steps, shortens the embedding time of a single casing section, and improves construction efficiency.

[0010] Preferably, the lifting ring is provided with lubricating cotton, and the annular lubricating cotton is located at the upper end of the receiving groove. The effect is that by applying lubricating medium through the lubricating cotton, the friction between the sleeve joint and the multi-section sleeve insertion is reduced. The lubricating medium forms a protective film to isolate water vapor and impurities, thereby reducing the occurrence of sleeve corrosion.

[0011] Preferably, a support ring is provided inside the flower tube. The support ring is located inside the flower tube, and multiple elastic elements are arranged around the axis of the flower tube. One end of the elastic element is set on the support ring, and the other end is set on the lifting ring. The effect is that the support ring provides a stable installation reference, and the multiple elastic elements are evenly distributed to prevent the lifting ring from tilting, constrain the movement of the lifting ring along the axis, and improve the stability of the movement.

[0012] Preferably, the elastic element includes a telescopic sleeve and a spring. One end of the telescopic sleeve is disposed on the support ring, and the other end is disposed on the lifting ring. The telescopic sleeve restricts the vertical up and down movement of the lifting ring. A spring is disposed inside the telescopic sleeve, and the spring is initially at its original length.

[0013] Preferably, the outer wall of the lifting ring is provided with multiple sets of balls, which are arranged around the axis of the flower cylinder. The inner wall of the flower cylinder is provided with vertical grooves that cooperate with the balls. The multiple sets of balls arranged around the circumference cooperate with the vertical grooves, so that the lifting ring and the flower cylinder remain coaxial when moving. The effect is that: the balls convert sliding friction into rolling friction, reducing resistance and making the lifting ring move more smoothly; the cooperation between the balls and the vertical grooves keeps the lifting ring and the flower cylinder coaxial, reducing component wear and extending the service life of the device.

[0014] Preferably, the flower tube has an installation hole on its outer side, which is located on the side wall of the flower tube in a direction perpendicular to the axis of the flower tube. The installation hole corresponds to the limiting post. One end of the telescopic member is set on the limiting post, and the other end is set in the installation hole.

[0015] Preferably, an L-shaped sliding groove is provided on the upper side of the mounting hole. The top plate and the limiting plate are vertically slidably disposed in the sliding groove. The top plate extends into the flower cylinder. When the lifting ring moves upward, it pushes the top plate, causing the limiting plate to move upward. A spring is provided between the upper side of the top plate and the sliding groove. The effect is that the spring drives the top plate and the limiting plate to rise and fall automatically, and cooperates with the L-shaped groove to limit the movement trajectory, ensuring the stability of the limiting plate's movement.

[0016] Preferably, the limiting plate is inverted U-shaped, and telescopic blocks are provided on both sides of the lower end of the limiting plate. A limiting ring is provided at the outer end of the limiting post. The outer side of the limiting ring is arc-shaped, and a pull ring is provided on the limiting post. When the limiting post is displaced to the outermost side, the limiting ring passes over the telescopic blocks of the limiting plate.

[0017] Preferably, an inclined platform is provided on the outer periphery of the lifting ring. When the lifting ring moves upward, the inclined platform causes the limiting post to move outward and abut against the outer wall of the lifting ring.

[0018] A method for burying steel casings, comprising the following steps, using an auxiliary device for burying steel casings as described in any of the preceding claims:

[0019] S1. Initial state: Elastic component one makes the lifting ring located at the lowest point inside the flower tube, and elastic component two makes the limiting post closest to the axis of the flower tube.

[0020] S2. Align the protective sleeve with the receiving groove of the lifting ring, so that the protective sleeve abuts against the receiving groove. The lifting ring moves upward along the inner wall of the flower tube. During the process, the inclined platform on the outer circumference of the lifting ring causes the limiting post to move outward and abut against the side wall of the lifting ring.

[0021] S3. When the lifting ring moves upward to the uppermost position, the lifting ring pushes the top plate, causing the limiting plate to move upward, the limiting column to move inward and insert into the protective sleeve, thus completing the connection and fixation of the protective sleeve.

[0022] S4. After installation, pull the ring on the limiting post to move the limiting post outward. The limiting ring and the limiting plate work together to restrict the limiting post. Remove the flower tube to complete the installation of one section of the protective tube.

[0023] The effects are as follows: By using the above operating method, the receiving groove can accommodate a slight tilt of the protective casing during installation, and the lifting ring buffers the transition, reducing the jamming problem caused by the tilt between the protective casing and the flower cylinder. Through the setting of the limiting post and the second elastic element, the limiting post can be automatically inserted into the protective casing, which can be quickly fixed when the protective casing is connected to the flower cylinder, and manual operation is reduced, the construction difficulty of long protective casings is reduced, and the construction safety risks are reduced. The lubricating cotton is coated with lubricating medium to reduce the friction between the protective casings. The lubricating medium forms a protective film to reduce the occurrence of rust on the protective casing. The ball bearings convert sliding friction into rolling friction, reducing resistance and making the lifting ring move more smoothly. The ball bearings cooperate with the vertical groove to keep the lifting ring and the flower cylinder coaxial, reduce component wear, and extend the service life of the device.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0025] The installation utilizes a lifting ring that moves up and down along the inner wall of the flower tube. The lifting ring has a receiving groove with a diameter larger than the outer diameter of the protective tube. This accommodates slight tilting of the protective tube during installation, reducing jamming during connection. Multiple connecting components are included, each containing a limiting post, a top plate, and a limiting plate. The limiting post can move perpendicular to the flower tube's axis. An elastic element is installed between the limiting post and the flower tube. Using the connecting components, the limiting post can be inserted when the protective tube and the flower tube are aligned, solving tilting problems during assembly and addressing difficulties in connection and operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the installation device of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of the protective sleeve of the present invention.

[0028] Figure 3 This is a schematic diagram of the structure of the flower tube of the present invention.

[0029] Figure 4This is a schematic diagram of the lifting ring structure of the present invention.

[0030] Figure 5 This is a schematic diagram of the structure of the connecting component of the present invention.

[0031] Figure 6 This is a schematic diagram of the structure of the telescopic block of the present invention.

[0032] Figure 7 This is a schematic diagram of the inclined platform of the present invention.

[0033] Figure 8 This is a schematic diagram of the structure of the lubricating cotton of the present invention.

[0034] Figure 9 This is a schematic diagram of the cross-section of the sliding groove of the present invention.

[0035] Figure 10 This is a structural schematic diagram showing the installation position of the limiting post of the present invention.

[0036] Figure 11 for Figure 10 An enlarged schematic diagram of part A in the middle.

[0037] Figure label:

[0038] 1. Flower tube; 11. Lifting ring; 111. Lubricating cotton; 112. Ball bearing; 114. Inclined platform; 12. Receiving groove; 13. Elastic component one; 131. Telescopic sleeve; 132. Spring one; 14. Support ring; 15. Mounting hole; 16. Sliding groove; 161. Spring piece; 2. Protective sleeve; 3. Connecting assembly; 31. Limiting post; 312. Pull ring; 32. Top plate; 33. Limiting plate; 331. Telescopic block. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] The installation of the casing 2 is a crucial step in pile foundation construction. The casing 2 can fix the pile position, protect the borehole opening, prevent the borehole opening from collapsing, and isolate surface water. In related technologies, when installing the casing 2, a perforated cylinder 1 is installed on the pile driver, and the casing 2 to be installed is installed at the lower end of the perforated cylinder 1. Then, the pile driver is used to install the casing 2 to the predetermined position to complete the installation of one section of casing 2. When connecting the casing 2 to the lower end of the perforated cylinder 1, the coaxiality between the casing 2 and the perforated cylinder 1 cannot be restricted, which can easily cause the casing 2 that needs to be inserted into the perforated cylinder 1 to get stuck with the perforated cylinder 1.

[0041] like Figures 1 to 11As shown, an auxiliary device for embedding steel casing includes a tube 1 and a casing 2. The tube 1 is installed on a pile driver and is driven to move by the pile driver. A lifting ring 11 is provided on the inner side of the tube 1. The lifting ring 11 can move up and down along the inner wall of the tube 1. A receiving groove 12 is opened on the inner side of the lifting ring 11. The diameter of the receiving groove 12 is larger than the outer diameter of the connecting section of the casing 2. Multiple sets of connecting components 3 are arranged around the side wall of the tube 1. The connecting components 3 include: a limiting post 31, a top plate 32, and a limiting plate 33. The limiting post 31 is set on the side wall of the tube 1. When the tube 1 is connected to the casing 2, the limiting post 31 inserts and locks the tube 1 and the casing 2. The limiting plate 33 and the top plate 32 cooperate. When the casing 2 is embedded, the limiting post 31 is pulled out, and the limiting plate 33 locks the limiting post 31, so that the tube 1 is separated from the embedded casing 2, thus completing the embedding of one section of the casing 2.

[0042] A lifting ring 11 is installed inside the flower tube 1 to prevent direct contact between the flower tube 1 and the protective tube 2 when they are connected. This reduces the chance of jamming caused by the end of the protective tube 2 directly abutting against the flower tube 1. The lifting ring 11 allows for quick insertion of the protective tube 2 and the flower tube 1 regardless of the angle of deviation of their axes. Multiple sets of connecting components 3 are installed around the side wall of the flower tube 1. When the protective tube 2 is connected to the flower tube 1, the limiting post 31 quickly fixes the protective tube 2 and the flower tube 1 together, solving the problem of the long protective tube 2 being high above the ground when it is connected, which makes manual operation inconvenient.

[0043] The upper end of the flower cylinder 1 is connected to the pile driver. The flower cylinder 1 and the pile driver are connected by a pin. By setting matching shaft holes at the connection between the flower cylinder 1 and the pile driver, a hinge is achieved by inserting a high-strength pin. This ensures power transmission and allows for a certain angle of swing, making it convenient for use in complex terrain or when the working angle needs to be adjusted.

[0044] like Figures 3 to 9 As shown, a lifting ring 11 is slidably installed inside the flower tube 1, and a support ring 14 is installed inside the flower tube 1. The support ring 14 is fixedly installed on the inner wall of the flower tube 1. The support ring 14 is preferably made of metal material and is fixed to the inner wall of the flower tube 1 by bolts or welding.

[0045] Multiple elastic elements 13 are arranged on the support ring 14 around the axis of the flower tube 1. The upper end of the elastic element 13 is fixedly arranged on the support ring 14, and the lower end of the elastic element 13 is arranged on the upper end of the lifting ring 11. The fixed arrangement of the support ring 14 provides stable support for the up and down movement of the lifting ring 11. The elastic element 13 makes the lifting ring 11 initially located at the lowest end. In the initial state, the lower end face of the lifting ring 11 is on the same plane as the lower end face of the flower tube 1. The support ring 14 restricts the lifting ring 11 to move up and down only within the flower tube 1 below the support ring 14 when it moves up and down.

[0046] likeFigures 3 to 7 As shown, the aforementioned elastic element 13 includes a telescopic sleeve 131 and a spring 132. The telescopic sleeve 131 consists of two retractable metal tubes. The upper section of the telescopic sleeve 131 is mounted on the support ring 14, and the lower section of the telescopic sleeve 131 is mounted on the lifting ring 11. When the lifting ring 11 moves up and down, the telescopic sleeve 131 restricts the lifting ring 11 from moving up and down along the path of the telescopic sleeve 131. A spring 132 is installed inside the telescopic sleeve 131. In the initial state, the spring 132... In the unforced natural state, when spring 132 is in its natural state, the lower end face of the lifting ring 11 is on the same plane as the lower end face of the flower tube 1. When the lifting ring 11 is subjected to force and moves upward, the telescopic sleeve 131 shortens and the spring 132 contracts, increasing the elastic potential energy of the spring 132. When the external force on the lifting ring 11 disappears, the elastic potential energy of the spring 132 is released, driving the telescopic sleeve 131 to return to its original length, and the lifting ring 11 returns to the state where its lower end face is on the same plane as the lower end face of the flower tube 1.

[0047] The telescopic sleeve 131 and spring 132 restrict the movement path of the lifting ring 11. Spring 132 keeps the lifting ring 11 in its initial state. When the lifting ring 11 moves under force, the telescopic sleeve 131 guides the lifting ring 11. Spring 132 stores force so that the lifting ring 11 quickly resets after the external force disappears.

[0048] like Figures 4 to 8 As shown, multiple sets of balls 112 are arranged on the outer wall of the lifting ring 11. The multiple sets of balls 112 are arranged around the axis of the flower cylinder 1. Each set of balls 112 has multiple balls. The multiple balls 112 are vertically arranged on the outer wall of the lifting ring 11. The balls 112 are embedded in the side of the lifting ring 11. An installation groove is opened on the side of the lifting ring 11. The depth of the installation groove is less than the diameter of the ball 112, usually 2 / 3 of the diameter. The ball 112 is embedded in the installation groove. A cover plate is set at the opening of the installation groove to prevent the ball 112 from falling out. Only part of the spherical surface is exposed to contact the mating part. The ball 112 is mostly made of high-strength bearing steel, which is hardened to improve hardness and wear resistance. For scenarios with rust prevention requirements, stainless steel can be selected.

[0049] The inner wall of the flower cylinder 1 is provided with vertical grooves. The vertical grooves are opened vertically on the inner wall of the flower cylinder 1. Multiple vertical grooves are arranged around the inner wall of the flower cylinder 1. The number of vertical grooves is the same as the number of sets of ball bearings 112. Each set of vertically arranged ball bearings 112 is slidably installed in the vertical groove. When the lifting ring 11 moves up and down, the ball bearings 112 roll up and down in the vertical groove, reducing the friction between the lifting ring 11 and the side wall of the flower cylinder 1, making the movement of the lifting ring 11 smoother and increasing the service life of the equipment.

[0050] like Figures 1 to 11As shown, a receiving groove 12 is provided on the inner side of the lifting ring 11. The annular receiving groove 12 is provided on the lower end face of the inner side of the lifting ring 11. The diameter of the receiving groove 12 is larger than the diameter of the connecting section of the protective cylinder 2. The receiving groove 12 can be machined on the lifting ring 11 by turning, or an annular ring can be provided on the lower end face of the lifting ring 11. The outer diameter of the annular ring is the same as the diameter of the lifting ring 11, and the inner diameter of the annular ring is larger than the diameter of the connecting section of the protective cylinder 2.

[0051] When connected, the connecting section of the protective sleeve 2 abuts against the receiving groove 12. When the connecting section of the protective sleeve 2 enters the flower cylinder 1, the protective sleeve 2 pushes the abutting receiving groove 12 to make the lifting ring 11 move upward along the flower cylinder 1. The lifting ring 11 moves upward along the telescopic path of the telescopic sleeve 131. At the same time, the multiple sets of ball bearings 112 reduce the contact friction when the lifting ring 11 moves upward.

[0052] Multiple sets of ball bearings 112 reduce the force deviation of the lifting ring 11 and replace sliding friction with rolling friction. By setting ball bearings 112 on each side of the lifting ring 11, when the lifting ring 11 is subjected to the squeezing force of the protective cylinder 2, the ball bearings 112 restrict the lifting ring 11 to always keep the lifting ring 11 coaxial with the flower cylinder 1, which solves the motion deviation caused by uneven friction, surface deformation or force concentration in sliding contact, thereby improving stability and service life.

[0053] like Figures 5 to 10 As shown, a lubricating cotton 111 is provided inside the lifting ring 11. The annular lubricating cotton 111 is located at the upper end of the receiving groove 12. The upper end of the receiving groove 12 has a groove for receiving the lubricating cotton 111. The lubricating cotton 111 is placed in the groove and is impregnated with a lubricating medium. The lubricating medium can reduce the friction and wear between the receiving groove 12 and the mating surface of the protective cylinder 2, reduce operating noise, prevent rust, and improve the stability of equipment operation. The annular lubricating cotton 111 is preferably made of sponge. The gaps in the sponge itself can accommodate more lubricating medium. When the lubricating cotton 111 is squeezed between the protective cylinder 2, the lubricating cotton 111 deforms and forms a local concave state, so that the upper end of the protective cylinder 2 can be fully impregnated.

[0054] An oil injection port is provided on the side of the lifting ring 11. After working for a period of time, new lubricating medium is injected into the lubricating cotton 111 through the oil injection port on the side of the lifting ring 11, so that the lubricating cotton 111 is always kept moist.

[0055] The lubricating cotton 111 lubricates the upper part of the casing 2 during installation. When connecting two casings 2, the lower casing 2 inserts into the upper casing 2. Due to misalignment or poor coaxiality, the connection between the two casings 2 can easily become stuck, preventing quick insertion and requiring manual adjustment. Since the installation environment for casing 2 is hazardous, workers are prone to injury. The lubricating cotton 111 ensures the upper part of the casing 2 is well-lubricated, reducing the risk of jamming during connection. Furthermore, the application of lubricant before each use effectively reduces corrosion and jamming at the connection points.

[0056] like Figures 1 to 8 As shown, a mounting hole 15 is provided on the outer side of the flower tube 1. The mounting hole 15 is opened in a direction perpendicular to the axis of the flower tube 1. A limiting post 31 is slidably disposed in the mounting hole 15. The limiting post 31 slides along the mounting hole 15 to approach or move away from the axis of the flower tube 1. A mounting block is provided on the outer side of the flower tube 1. A horizontal through hole is provided on the mounting block. The diameter of the horizontal through hole is larger than the diameter of the mounting hole 15. The horizontal through hole on the mounting block is coaxial with the mounting hole 15.

[0057] A limiting ring is provided on the limiting post 31. The limiting ring is located at the end of the limiting post 31 away from the axis of the flower tube 1. The diameter of the limiting ring is larger than that of the limiting post 31. The diameter of the limiting ring is the same as that of the through hole of the mounting block. When the limiting post 31 moves toward the axis of the flower tube 1, the limiting ring abuts against the side wall of the flower tube 1, and the limiting post 31 cannot continue to move inward.

[0058] The mounting block is equipped with an L-shaped sliding groove 16. The upper section of the sliding groove 16 is horizontal, and the lower section is vertical. The vertical sliding groove 16 intersects with the horizontal through hole in the mounting hole 15. The limiting plate 33 is vertically positioned and slides up and down along the flower cylinder 1. The top plate 32 is horizontal and moves up and down along the flower cylinder 1. The flower cylinder 1 has a slot for the top plate 32 to pass through. The horizontal section of the sliding groove 16 is aligned with the slot on the flower cylinder 1. The end of the top plate 32 closest to the axis of the flower cylinder 1 extends into the flower cylinder 1. During lifting... When the ring 11 moves upward, the lifting ring 11 causes the top plate 32 to move upward. The top plate 32 and the limiting plate 33 are connected by a plug-in connection. The top plate 32 has a plug hole, and the upper end of the limiting plate 33 has a plug rod. The plug rod of the limiting plate 33, in conjunction with the plug hole on the top plate 32, allows the limiting plate 33 and the top plate 32 to be plugged in. The limiting plate 33 and the top plate 32 form an L-shape. When the top plate 32 is pushed up and down by the lifting ring 11, the limiting plate 33 moves up and down with the top plate 32 in the L-shaped sliding groove 16.

[0059] likeFigures 2 to 6 As shown, the limiting plate 33 is arranged in an inverted U-shape. The insertion rod on the limiting plate 33 is located at the upper end of the limiting plate 33. When the limiting plate 33 slides up and down, it is located on both sides of the limiting post 31. A spring piece 161 is provided between the top plate 32 and the sliding groove 16. The spring piece 161 is located on the upper side of the top plate 32. The spring piece 161 makes the limiting plate 33 located at the lower end of the L-shaped sliding groove 16. When the top plate 32 moves upward, the spring piece 161 is compressed by force, and the elastic potential energy of the spring piece 161 increases. When the external force on the top plate 32 disappears, the spring piece 161 makes the top plate 32 return to the initial position.

[0060] The lower section of the limiting plate 33 is provided with telescopic blocks 331 on both sides near the limiting post 31. The minimum distance between the two telescopic blocks 331 is less than the diameter of the upper limit ring of the limiting post 31. The side of the telescopic block 331 near the axis of the flower tube 1 is set as an inclined surface. When the limiting post 31 moves outward, the limiting ring set on the limiting post 31 pushes the telescopic block 331, causing the telescopic blocks 331 on both sides to retract. After the limiting ring passes the telescopic block 331, the telescopic block 331 locks the limiting ring, causing the limiting post 31 to disengage from the connecting hole set on the protective tube 2. When the limiting ring moves outward, the surface that abuts against the telescopic block 331 is an arc surface. Setting the contact surface as an arc shape makes the stress between the limiting ring and the telescopic block 331 smaller when they abut, and the limiting ring can quickly pass the telescopic block 331.

[0061] like Figures 5 to 7 As shown, a pull ring 312 is provided on the outer end face of the limiting post 31. The pull ring 312 of the limiting post 31 is fixed to the side of the limiting post 31 by bolts or other means. When the protective cylinder 2 needs to be removed, when the limiting post 31 moves outward from the position close to the axis of the flower cylinder 1, the pull ring 312 pulls the limiting post 31 to move, causing the telescopic member 2 between the limiting post 31 and the flower cylinder 1 to extend. The elastic potential energy of the telescopic member 2 increases. When the limiting post 31 moves outward, the limiting ring provided on the limiting post 31 abuts against the telescopic block 331, causing the telescopic block 331 to contract inward. The limiting ring passes over the telescopic block 331, and the telescopic block 331 jams the limiting ring, preventing the limiting post 31 from directly resetting.

[0062] When the protective sleeve 2 needs to be disassembled, the pull ring 312 is installed so that the worker can quickly insert the pull ring 312 of the limiting post 31 with tools such as pry bars to pull the limiting post 31 out of the connection of the protective sleeve 2. The upper outer periphery of the lifting ring 11 is provided with a ramp 114. When the lifting ring 11 moves upward, the ramp 114 of the lifting ring 11 causes the limiting post 31 to move outward. After the limiting post 31 moves outward, the limiting post 31 abuts against the outer wall of the lifting ring 11. When the lifting ring 11 moves upward, the limiting post 31 abuts against the outer wall of the lifting ring 11. When the protective sleeve 2 moves to the designated position, the limiting post 31 is inserted into the connection hole of the protective sleeve 2 under the action of the telescopic part 2, thus completing the connection of the protective sleeve 2.

[0063] The working principle of a steel casing installation auxiliary device: In the initial state, the elastic element 13 on the inner support ring 14 of the flower cylinder 1 is at its original length, pushing the lifting ring 11 to the lowest end of the flower cylinder 1, with the lower end face of the lifting ring 11 flush with the lower end face of the flower cylinder 1; the elastic element 2 in the mounting hole 15 on the side wall of the flower cylinder 1 is at its original length, pulling the limiting post 31 to be closest to the axis of the flower cylinder 1, while the spring piece 161 in the L-shaped sliding groove 16 makes the top plate 32 and the inverted U-shaped limiting plate 33 at the lowest end. At this time, the height of the limiting post 31 and the telescopic block 331 on the limiting plate 33 do not correspond, and the telescopic blocks 331 on both sides of the limiting plate 33 are in the extended state.

[0064] During the docking phase, the protective sleeve 2 is aligned with the inner receiving groove 12 of the lifting ring 11. The diameter of the receiving groove 12 is larger than the outer diameter of the protective sleeve 2, allowing for a slight tilt of the protective sleeve 2. The connecting section of the protective sleeve 2 abuts against the bottom of the receiving groove 12, pushing the lifting ring 11 upward along the inner wall of the flower cylinder 1. The lubricating cotton 111 inside the lifting ring 11 can apply lubricating medium to the upper end of the protective sleeve 2 during docking, reducing jamming during insertion and improving the smoothness of docking. During the process, the outer ball bearings 112 of the lifting ring 11 roll along the vertical groove inside the flower cylinder 1, ensuring that the lifting ring 11 and the flower cylinder 1 are coaxial. The inclined platform 114 on the outer periphery of the lifting ring 11 gradually squeezes the limiting post 31, overcoming the elastic force of the elastic element 2, causing the limiting post 31 to move outward until the limiting post 31 abuts against the outer wall of the lifting ring 11. At the same time, the upper end of the lifting ring 11 pushes the top plate 32, compresses the spring sheet 161, and causes the top plate 32 to drive the limiting plate 33 to move upward along the sliding groove 16. The telescopic block 331 of the limiting plate 33 moves upward until the telescopic block 331 is aligned with the limiting ring.

[0065] During the locking phase, when the lifting ring 11 moves to the uppermost position, the telescopic sleeve 131 retracts to its limit position, the lifting ring 11 no longer squeezes the limiting post 31, the elastic element 2 releases its elastic force, and pulls the limiting post 31 to move inward quickly and insert into the connection hole set in the casing 2, thus completing the fixed connection between the casing 2 and the flower cylinder 1. Subsequently, the casing 2 can be pressed into the designated burial position by driving the flower cylinder 1 with a pile driver.

[0066] During the separation phase, after the casing 2 is installed, the outer end pull ring 312 of the limiting post 31 is pulled to overcome the elastic force of the elastic element and pull the limiting post 31 outward from the connection hole of the casing 2. When the limiting post 31 moves outward, its outer limiting ring squeezes the telescopic block 331 of the limiting plate 33 to make it contract. After the limiting ring passes the telescopic block 331, the telescopic block 331 resets and locks the limiting ring, restricting the limiting post 31 from resetting. At this time, the flower cylinder 1 can be lifted upward to separate the flower cylinder 1 from the installed casing 2, completing the installation of a single section of casing 2.

[0067] Another method for burying steel casings is provided, including the following steps:

[0068] S1. Initial state: The elastic element 13 is at its original length, pushing the lifting ring 11 to the lowest end of the inner side of the flower tube 1, with the lower end face of the lifting ring 11 flush with the lower end face of the flower tube 1; the elastic element 2 makes the limiting post 31 closest to the axis of the flower tube 1, and the limiting plate 33 and the top plate 32 are at the lowest end under the action of the spring piece 161.

[0069] S2, Connecting the protective sleeve 2: The upper end of the protective sleeve 2 abuts against the receiving groove 12, the flower cylinder 1 moves downward, and the protective sleeve 2 pushes the lifting ring 11 upward. The ball bearings 112 of the lifting ring 11 roll along the vertical groove to maintain coaxiality, and the inclined platform 114 on the outer periphery of the lifting ring 11 squeezes the limiting post 31 to overcome the elastic force of the elastic element and move outward until it abuts against the outer wall of the lifting ring 11; the upper end of the lifting ring 11 pushes the top plate 32, compressing the spring piece 161 to make the top plate 32 move upward with the limiting plate 33.

[0070] S3. Locking and Fixing: The lifting ring 11 moves to the top and no longer presses against the limiting post 31. The elastic element pulls the limiting post 31 inward and inserts it into the connecting hole of the protective cylinder 2, completing the fixing. Gently shake the flower cylinder 1 to confirm that there is no displacement and the locking is secure.

[0071] S4. Installation and Separation: The pile driver drives the pile driver cylinder 1 to press the casing 2 into the predetermined position. After installation, pull the limiting post 31 and pull the ring 312 to move it outward and separate it from the casing 2. The limiting ring passes over the telescopic block 331, and the telescopic block 331 locks the limiting ring. Lift the pile driver cylinder 1 to complete the separation, inspect the device components, and prepare for the installation of the next section of casing 2.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An auxiliary device for burying steel casings, comprising: Flower tube and protective tube; characterized in that, a lifting ring that moves up and down along the inner wall of the flower tube is provided on the inner side of the flower tube, and a receiving groove is opened on the inner side of the lifting ring. The diameter of the receiving groove is larger than the outer diameter of the protective tube. An elastic element is provided between the lifting ring and the flower tube. Multiple sets of connecting components are arranged around the side wall of the flower tube. The connecting components include: a limiting post, a top plate that is horizontally arranged on the side wall of the flower tube, and a limiting plate that is vertically arranged and moves up and down along the flower tube. The limiting post is perpendicular to the axis of the flower tube and is close to or far from the axis of the flower tube. An elastic element is provided between the limiting post and the flower tube. The top plate and the limiting plate are L-shaped. When the limiting plate is at the uppermost end, it can lock the limiting post located at the outermost end. In the initial state, the first elastic element keeps the lifting ring at the bottom and the second elastic element keeps the limiting post closest to the axis of the flower tube. When connected, the protective sleeve abuts against the receiving groove of the lifting ring, the lifting ring moves upward along the flower tube to the top, the lifting ring squeezes the limiting post so that it abuts against the outer wall of the lifting ring, the lifting ring moves to the top, and the limiting post is inserted into the protective sleeve. A support ring is fixedly installed inside the flower tube. Multiple elastic elements are arranged around the axis of the flower tube. The elastic element includes a telescopic sleeve and a spring. One end of the telescopic sleeve is set on the support ring and the other end is set on the lifting ring. The telescopic sleeve restricts the vertical up and down movement of the lifting ring. A spring is installed inside the telescopic sleeve. The spring is initially at its original length. Multiple sets of balls are provided on the outer wall of the lifting ring. The multiple sets of balls are arranged around the axis of the flower cylinder. The inner wall of the flower cylinder is provided with vertical grooves that cooperate with the balls. The multiple sets of balls arranged around the circumference cooperate with the vertical grooves to keep the lifting ring coaxial with the flower cylinder when it moves. The flower tube has mounting holes on its outer side. The mounting holes are opened on the side wall of the flower tube in a direction perpendicular to the axis of the flower tube. The mounting holes are set one-to-one with the limiting posts. One end of the elastic element is set on the limiting post and the other end is set in the mounting hole. An L-shaped sliding groove is provided on the upper side of the mounting hole. The top plate and the limiting plate are vertically slidably set in the sliding groove. The top plate extends into the flower tube. When the lifting ring moves upward, it pushes the top plate, causing the limiting plate to move upward. A spring piece is provided between the upper side of the top plate and the sliding groove. The limiting plate is inverted U-shaped, and telescopic blocks are provided on both sides of the lower end of the limiting plate. A limiting ring is provided at the outer end of the limiting post. The outer side of the limiting ring is arc-shaped, and a pull ring is provided on the limiting post. When the limiting post is moved to the outermost position, the limiting ring passes over the telescopic blocks of the limiting plate.

2. The auxiliary device for burying steel casing according to claim 1, characterized in that, The lifting ring is provided with lubricating cotton, and the annular lubricating cotton is located at the upper end of the receiving groove.

3. The auxiliary device for burying steel casing according to claim 1, characterized in that, An inclined platform is provided on the outer periphery of the lifting ring. When the lifting ring moves upward, the inclined platform causes the limiting post to move outward and abut against the outer wall of the lifting ring.

4. A method for burying steel casings, comprising an auxiliary device for burying steel casings according to any one of claims 1-3, characterized in that, Includes the following steps: S1. Initial state: Elastic component one makes the lifting ring located at the lowest point inside the flower tube, and elastic component two makes the limiting post closest to the axis of the flower tube. S2. Align the protective sleeve with the receiving groove of the lifting ring, so that the protective sleeve abuts against the receiving groove. The lifting ring moves upward along the inner wall of the flower tube. During the process, the inclined platform on the outer circumference of the lifting ring causes the limiting post to move outward and abut against the side wall of the lifting ring. S3. When the lifting ring moves upward to the uppermost position, the lifting ring pushes the top plate, causing the limiting plate to move upward, the limiting column to move inward and insert into the protective sleeve, thus completing the connection and fixation of the protective sleeve. S4. After installation, pull the ring on the limiting post to move the limiting post outward. The limiting ring and the limiting plate work together to restrict the limiting post. Remove the flower tube to complete the installation of one section of the protective tube.

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