Quick-connect Separation Device and Method for Connecting a Cylinder and a Steel Casing

Abstract

The present invention belongs to a quick connection and separation device and method for connecting a pattern cylinder and a steel casing. The device includes a cylinder body, a protective ring, a top plate, a U-shaped groove, a connecting square cylinder and a pin rod through hole. A quick connection and separation device is provided on the outer wall of the lower part of the cylinder body of the connecting pattern cylinder to enable each pin rod inside the lower end of the connecting pattern cylinder to be quickly connected and separated from each steel casing pin hole at the upper end of the steel casing. The quick connection and separation device consists of a switch rotary disk, 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 connecting pattern cylinder and the steel casing through the quick connection and separation device. When the connecting pattern cylinder and the steel casing are docked in the present invention, only manual operation on the ground is required to complete the docking or separation construction process of the two. The process completion time is short, which is beneficial to improving the on-site construction progress, reducing construction personnel, saving time and effort, and eliminating construction safety risks.

Description

Technical Field

[0001] The present invention belongs to a quick connection and separation device and method for connecting a pattern cylinder and a steel casing. Background Art

[0002] At present, the drill pipe of a rotary drilling rig drives the steel casing through a connecting pattern cylinder to bury the steel casing, and burying the casing is the first process of the rotary drilling pile forming process. The existing connecting pattern cylinder includes a cylinder body and a top plate. A cavity is arranged inside the cylinder body. The top end of the cylinder body is fixedly welded to the bottom end of the top plate. The bottom end of the cylinder body is provided with an opening which communicates with the cavity. The outer wall of the cylinder body is provided with circumferentially uniformly distributed pin rod through holes, and pin rods are arranged in the pin rod through holes. The inner ends of the pin rods all extend from the outer wall of the cylinder body through the cylinder wall into the cavity. At the lower end of the outer wall of the cylinder body, U-shaped grooves are arranged at intervals. Through the arrangement of the U-shaped grooves, the positioning rods on the steel casing can be limited and fixed, so that the device is more stable when the steel casing below rotates during the rotation process, and the pin rods are also shared in force. In the middle of the top end of the top plate, a connecting square cylinder is fixedly arranged. The connecting pattern cylinder is fixedly connected to the lower end of the drill pipe driven by a drill pipe driver on the rotary drilling rig through the connecting square cylinder; when the lower end of the connecting pattern cylinder is butted against the upper end of the steel casing, the upper end of the steel casing (circumferentially uniformly distributed steel casing pin holes are also correspondingly arranged on the outer wall of the upper end of the steel casing for the pin rod through holes on the connecting pattern cylinder) is inserted into the opening from the bottom end of the connecting pattern cylinder, and the lower end of the connecting pattern cylinder and the upper end of the steel casing are fixedly connected by passing each pin rod (or connecting bolt) through each pin rod through hole and the steel casing pin hole in sequence.

[0003] The following deficiencies are found in the fixed connection structure between the lower end of the existing connecting pattern cylinder and the upper end of the steel casing during use:

[0004] (1) Since the length of each steel casing is usually 5 - 10 m, and the steel casings screwed into the ground often need to be connected in series for several sections. After the lower end of the connecting pattern cylinder and the upper end of the steel casing are butted and positioned, it is necessary for workers to set up a ladder to the butting position above the ground, and the lower end of the connecting pattern cylinder and the upper end of the steel casing are fixedly connected by workers inserting each pin rod (or connecting bolt) through each pin rod through hole and the pin hole in sequence. This not only makes the connection between the two troublesome, time-consuming and laborious, but also the high-altitude operation of setting up a ladder by workers is dangerous, and there are often accidents of workers falling and getting injured.

[0005] (2) When the two are butted or the steel casing is removed, multiple people are required for butting operations, which takes a long time. The construction speed is slow, the efficiency is low, and the construction process of the pin rod or the connecting bolt is relatively complex, with many construction processes, which has an adverse impact on the construction period of the project. Summary of the Invention

[0006] The purpose of the present invention is to design a quick connection and separation device and method for connecting a pattern cylinder and a steel casing, which can overcome the above deficiencies and improve the quick connection and separation speed and efficiency of the pattern cylinder and the steel casing.

[0007] For this purpose, a quick-connect and separation device for connecting a pattern cylinder and a steel casing includes a cylinder body, a protective ring, a top plate, a U-shaped groove, a connecting square cylinder, and a pin rod through-hole. On the outer wall of the lower part of the cylinder body of the connecting pattern cylinder, a quick-connect and separation device is provided to enable each pin rod inside the lower end of the connecting pattern cylinder to be quickly connected to and separated from each steel casing pin hole at the upper end of the steel casing.

[0008] As a preferred technical solution of the present invention, the quick-connect and separation device is composed of a switch rotating disk, an opening hole, a closing inclined plate, a spring chamber, a spring, a pin rod, a switch rod, and a pin rod through-hole. A plurality of pin rod through-holes are circumferentially and evenly distributed on the outer wall of the lower end of the cylinder body. The inner ends of each pin rod through-hole extend from the outer wall of the cylinder body through the cylinder wall into the cavity. A switch rotating disk is axially provided on the outer wall of the lower part of the cylinder body outside each pin rod through-hole. At positions corresponding to each pin rod through-hole on the switch rotating disk, opening holes are provided at spaced distances. The rear edge of the opening hole is integrally connected with the rear edge of the closing inclined plate. The front edge of the closing inclined plate is obliquely arranged forward and outside and is located in the middle space of the opening hole. A spring chamber is provided outside each pin rod through-hole. The inner diameter of the spring chamber is larger than the inner diameter of the pin rod through-hole. The spring is located in the spring chamber. A top plate is provided on the outer side of each pin rod. The pin rod inside the top plate is located in the pin rod through-hole. The pin rods on the inner side of each top plate extend from the outer wall of the cylinder body through each spring chamber and the pin rod through-hole into the cavity. The top plates of each pin rod enclose the spring in the spring chamber. A through-hole for the pin rod to pass through is provided in the middle of the cover plate. The top plates of each pin rod are enclosed in the spring chamber through the cover plate. The cover plate is fixed on the outer wall of the cylinder body outside each pin rod through-hole by screws. The pin rod outside the top plate protrudes outside the outer wall of the cylinder body through the through-hole on the cover plate. A pulling device for moving the switch rotating disk is provided on the outer wall of the switch rotating disk.

[0009] As a preferred technical solution of the present invention, the pulling device is: a plurality of switch rods are circumferentially and spacedly distributed on the outer wall of the switch rotating disk, and a pull ring is provided at the outer end of the switch rod; or the pulling device is: an annular rack is provided on the upper part of the outer wall of the switch rotating disk, a motor is provided on the cylinder body at the upper end of the annular rack, and a driving gear is provided on the motor shaft, and the driving gear meshes with the annular rack.

[0010] As a preferred technical solution of the present invention, one end of a pulling rope with a length of several meters is fixed to the pull ring of the switch rod.

[0011] As a preferred technical solution of the present invention, a plurality of top support pulleys are circumferentially and spacedly provided on the outer wall of the cylinder body at the lower end of the switch rotating disk, and the lower end of the switch rotating disk is slidably fitted on each top support pulley.

[0012] As a preferred technical solution of the present invention, the opening hole is a long strip-shaped hole, and the pin rod outside the top support plate passes through the through hole on the sealing cover plate and protrudes outside the outer wall of the cylinder body. The height of the pin rod protruding outside the outer wall of the cylinder body is greater than the thickness of the switch rotary disk, and the height of the pin rod protruding outside the outer wall of the cylinder body is less than the height of the front surface of the front edge of the closing inclined plate.

[0013] As a preferred technical solution of the present invention, the rear edge of the opening hole is a forward bevel edge with the same slope as the inner side surface of the rear edge of the closing inclined plate.

[0014] As a preferred technical solution of the present invention, universal balls are provided on the outer end surfaces of the pin rods.

[0015] A construction method of a quick connection and separation device for connecting a flower cylinder and a steel casing tube includes the following steps:

[0016] (1) Prepare a rotary drilling rig, a steel casing tube, and a drill bucket used by the rotary drilling rig at the construction site, and prepare a connecting flower cylinder with a quick connection and separation device.

[0017] (2) Fix and connect the lower end of the drill rod of the rotary drilling rig and the connecting square tube at the upper end of the connecting flower cylinder through a locking pin. When on the ground, fix one end of the pull rope to the pull ring of the switch rod. The fixed pull ropes are two distributed on the opposite side pull rings, or three distributed on the triangular side pull rings, or four distributed on the quadrangular side pull rings. The length of each pull rope is greater than the height of the steel casing tube. At this time, the quick connection and separation device is in the closed state, the springs in each spring chamber are stretched, and each pin rod outside the top support plate protrudes into the outer space of the opening hole. The inner end surface of each pin rod is flush with the inner end surface of the pin rod through hole.

[0018] (3) Start the rotary drilling rig to move the connecting flower cylinder to the upper end of the steel casing tube. Align the lower port of the cylinder body 15 of the connecting flower cylinder with the upper end of the steel casing tube. The drill rod drives the connecting flower cylinder to move downward. When the U-shaped groove of the connecting flower cylinder is limited and fixed with the positioning rod on the steel casing tube, the pin rod through holes on the connecting flower cylinder are aligned and penetrated with the casing pin holes at the corresponding positions on the steel casing tube.

[0019] (4) Use the quick connection and separation device to dock and lock the connecting flower cylinder and the steel casing tube: Manually pull the pull rope on the ground to make the pull rope drive the switch rotary disk to rotate clockwise through the pull ring and the switch rod in sequence, so that the upper parts of the pin rods located in the outer space of each opening hole move towards the lower surface of the closing inclined plate at the rear of the opening hole. The lower inclined surface of the lower end of the closing inclined plate presses the universal ball at the upper end of the pin rod to make the pin rod move into the casing pin hole along the spring chamber and the pin rod through hole, and the top support plate on it compresses the spring in the spring chamber to store energy. Under the action of the closing inclined plate, when the universal ball at the upper end of the pin rod moves to the space between the switch rotary disk and the connecting flower cylinder, it presses the rear ends of the pin rods to pass through the pin rod through holes and enter the casing pin holes of the steel casing tube, completing the docking and locking of the connecting flower cylinder and the steel casing tube.

[0020] (5) Start the rotary drilling rig and move the connecting cylinder and the steel casing to the pile position for pile construction;

[0021] (6) Use the quick-connect separation device to separate the connecting cylinder and the steel casing: Since the lower part of the implanted steel casing has been spun into the ground and the lower end of the connecting cylinder is already 0.5 - 1 m above the ground, before extending the steel casing, the connecting cylinder and the implanted steel casing should be manually separated. Manually pull the switch rod on the ground to drive the switch rotating disk to rotate clockwise (or pull the rope, so that the rope drives the switch rod through the pull ring in turn). When the universal balls at the upper ends of the pin rods move to the front part of the next corresponding opening hole in the switch rotating disk, the pin rods lose the support of the inner end face of the switch rotating disk, and the springs in the compression spring chamber stretch to push the top plate to drive the pin rods to pop out towards the outside of the opening hole, driving the rear end faces of the pin rods to retract into the pin rod through holes, completing the separation of the connecting cylinder and the steel casing.

[0022] (7) Repeat steps (3) to (6) until the steel casing implantation operation is completed.

[0023] As a preferred technical solution of the present invention, when using the quick-connect separation device to separate the connecting cylinder and the steel casing, it is possible to manually pull the switch rod on the ground to drive the switch rotating disk to rotate counterclockwise to the front part of the opening hole.

[0024] The above device and method achieve the purpose of the present invention.

[0025] Compared with the prior art, the present invention has the following advantages and positive effects:

[0026] (1) When the connecting cylinder and the steel casing are docked in the present invention, it overcomes the deficiencies of the traditional construction process that is time-consuming, laborious, and dangerous, such as manually climbing a ladder to the docking position above the ground and fixing the lower end of the connecting cylinder to the upper end of the steel casing by inserting each pin rod (or connecting bolt) through the pin rod through holes and pin holes in turn by workers.

[0027] (2) When the connecting cylinder and the steel casing are docked in the present invention, only manual operation on the ground is required to complete the docking or separation construction process of the two. The process completion time is short, which is conducive to improving the on-site construction progress, reducing the number of construction personnel, saving time and effort, and eliminating construction safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present invention;

[0029] Figure 2 is a partial structural schematic diagram of the present invention when the pin rod part separates the connecting cylinder and the steel casing;

[0030] Figure 3 is a partial structural schematic diagram of the present invention when the pin rod part docks and locks the connecting cylinder and the steel casing;

[0031] Figure 4 It is a schematic structural diagram of the usage state of the present invention;

[0032] Figure 5 It is a schematic structural diagram of another embodiment of the present invention.

[0033] Wherein: 1. Switch rotary disc; 2. U-shaped groove; 3. Opening hole; 4. Top support pulley; 5. Closing inclined plate; 6. Pin rod; 61. Top support plate; 7. Pull ring; 8. Switch rod; 9. Protection ring; 10. Top plate; 11. Connecting square tube; 12. Square hole; 13. Through hole; 14. Connecting plate; 15. Cylinder body; 16. Screw; 17. Spring chamber; 18. Spring; 19. Steel casing pin hole; 20. Pin rod through hole; 21. Sealing cover plate; 22. Universal ball; 23. Steel casing; 24. Guide rail frame; 25. Drill pipe; 26. Drill pipe driving device; 27. Rotary drilling rig; 28. Pulling rope; 29. Driving gear; 30. Motor; 31. Annular rack. Detailed implementation manners

[0034] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present invention. The experimental methods in the following embodiments are all conventional methods unless otherwise specified. The materials, devices, equipment, reagents, etc. used in the following embodiments can all be obtained from commercial channels unless otherwise specified.

[0035] Embodiment 1: As Figures 1 to 5 shown, a quick connection and separation device for connecting a connecting flower tube and a steel casing includes a cylinder body 15, a protection ring 9, a top plate 10, a U-shaped groove 2, a connecting square tube 11 and a pin rod through hole 20. The inside of the connecting square tube 11 is a square hole 12 for docking with the lower end of the drill pipe 25. After docking, the two are passed through the through holes 13 communicated with each other by a fixed connecting rod to complete docking or separation vice versa. The protection ring 9 is located on the outer wall of the cylinder body above the pin rod through hole through evenly distributed connecting plates 14 for anti-collision protection of each pin rod through hole and the devices inside. On the outer wall of the lower part of the cylinder body of the connecting flower tube, a quick connection and separation device is provided to enable each pin rod 6 inside the lower end of the connecting flower tube to be connected with each steel casing pin hole 19 at the upper end of the steel casing 23.

[0036] As Figures 1 to 4As shown in the figure, the quick-connection and separation device is composed of a switch rotating disk 1, an opening hole 3, a closing inclined plate 5, a spring chamber 17, a spring 18, a pin rod 6, a switch rod 8, and a pin rod through-hole 20. A number of circumferentially evenly distributed pin rod through-holes 20 (usually 8 - 12 according to different diameters of the steel casing) are provided on the outer wall of the lower end of the cylinder body 15. The inner ends of each pin rod through-hole penetrate through the cylinder wall from the outer wall of the cylinder body and extend into the cavity. A switch rotating disk 1 is axially arranged on the outer wall of the lower part of the cylinder body outside each pin rod through-hole. Opening holes 3 are provided on the switch rotating disk corresponding to the positions of each pin rod through-hole 20, and the number of the opening holes is the same as that of the pin rod through-holes. The rear end edge of the opening hole 3 is integrally connected with the rear end edge of the closing inclined plate 5. The front end edge of the closing inclined plate is obliquely arranged forward and outward and is located in the middle space of the opening hole. The front end face of the closing inclined plate is arc-shaped, and the closing inclined plate is integrally an arc-shaped inclined plate. The lower end face of the inclined plate should extend to the inner wall of the switch rotating disk to facilitate the closing inclined plate to press the upper end of the pin rod against the inner wall surface of the switch rotating disk.

[0037] A spring chamber 17 is provided outside each pin rod through-hole 20. The inner diameter of the spring chamber 17 is larger than the inner diameter of the pin rod through-hole. The spring 18 is located in the spring chamber. A top support plate 61 is provided outside each pin rod 6. The pin rod inside the top support plate 61 is located in the pin rod through-hole. The pin rods inside each top support plate extend into the cavity from the outer wall of the cylinder body through each spring chamber 17 and the pin rod through-hole 20. The top support plates 61 of each pin rod enclose the spring in the spring chamber. A through-hole for the pin rod to pass through is provided in the middle of the cover plate 21. The top support plates of each pin rod are enclosed in the spring chamber through the cover plate 21. The cover plate is fixed on the outer wall of the cylinder body outside each pin rod through-hole by screws 16. The pin rod 6 outside the top support plate protrudes outside the outer wall of the cylinder body through the through-hole on the cover plate. A pulling device for moving the switch rotating disk 1 is provided on the outer wall of the switch rotating disk.

[0038] The pulling device in this embodiment is: A number of switch rods 8 are circumferentially and spacedly distributed on the outer wall of the switch rotating disk. A pull ring 7 is provided at the outer end of the switch rod; to facilitate driving the switch rotating disk to rotate. One end of a pull rope 28 with a length of several meters is fixed to the pull ring of the switch rod, and the other end of the pull rope should be located above the ground during docking.

[0039] A number of top support pulleys 4 are circumferentially and spacedly provided on the outer wall of the cylinder body at the lower end of the switch rotating disk. The top support pulleys are axially arranged on the shaft rod, and the shaft rod is fixed on the outer wall of the cylinder body. The lower end of the switch rotating disk is slidably fitted on each top support pulley, so as to facilitate the movement of the switch rotating disk on the top support pulley shaft.

[0040] The opening hole 3 is a long strip-shaped hole. The pin rod 6 on the outer side of the top support plate 61 passes through the through hole on the sealing cover plate 21 and protrudes outside the outer wall of the cylinder body. The height of the pin rod 6 protruding outside the outer wall of the cylinder body is greater than the thickness of the switch rotating disc, and the height of the pin rod protruding outside the outer wall of the cylinder body is less than the height of the front surface of the front edge of the closing inclined plate, so as to facilitate the lower end surface of the closing inclined plate to press against the upper end of the pin rod. The rear edge of the opening hole is a forward bevel with the same slope as the inner side surface of the rear edge of the closing inclined plate, so as to facilitate the closing inclined plate to press the upper end of the pin rod to the inner wall surface of the switch rotating disc.

[0041] Universal balls 22 are provided on the outer end surfaces of the pin rods. Ball grooves can be provided on the upper end surfaces of the pin rods, and the universal ball shafts are arranged in the ball grooves, so as to facilitate the universal ball 22 on the lower end surface of the closing inclined plate pressing against the upper end of the pin rod to drive the upper end of the pin rod to the inner wall surface of the switch rotating disc.

[0042] A construction method of a quick connection and separation device for connecting a flower cylinder and a steel casing tube includes the following steps:

[0043] (1) Prepare a rotary drilling rig 27, several steel casing tubes 23, and the drill buckets used by the rotary drilling rig at the construction site, and prepare a connecting flower cylinder with a quick connection and separation device. The drill rod 25 of the rotary drilling rig is driven by a drill rod driving device 26 running along the guide rail frame 24, which is a traditional technology and will not be elaborated here.

[0044] (2) Fix and connect the lower end of the drill rod 25 of the rotary drilling rig with the connecting square tube 11 at the upper end of the connecting flower cylinder through a locking pin. When on the ground, fix one end of the pull rope 28 with the pull ring 7 of the switch rod. The fixed pull ropes are two distributed on the opposite pull rings, or three distributed on the triangular pull rings, or four distributed on the quadrilateral pull rings. The length of each pull rope is greater than the height of the steel casing tube. At this time, the quick connection and separation device is in the closed state, the springs 18 in each spring chamber 17 are stretched, and each pin rod 6 on the outer side of the top support plate protrudes into the outer space of the opening hole 3, and the inner end surfaces of the pin rods are flush with the inner end surfaces of the pin rod through holes.

[0045] (3) Start the rotary drilling rig to move the connecting flower cylinder to the upper end of the steel casing tube. Align the lower port of the cylinder body 15 of the connecting flower cylinder with the upper end of the steel casing tube. The drill rod drives the connecting flower cylinder to move down. When the U-shaped groove of the connecting flower cylinder is limited and fixed with the positioning rod on the steel casing tube, the pin rod through holes 20 on the connecting flower cylinder are aligned and penetrated with the casing tube pin holes 19 at the corresponding positions on the steel casing tube.

[0046] (4) Use the quick-connect separation device to dock and lock the connecting cylinder and the steel casing: Manually pull the pull rope on the ground, so that the pull rope passes through the pull ring and the switch rod in sequence to drive the switch rotary disk 1 to rotate clockwise, making the upper parts of the pin rods at the spaces outside the opening holes move towards the lower surface of the closing inclined plate 5 at the rear part inside the opening holes. The lower inclined surface of the lower end of the closing inclined plate presses against the universal ball at the upper end of the pin rod 6, causing the pin rod to move into the casing pin hole along the spring chamber and the pin rod through hole, and the supporting plate 61 thereon compresses the spring 18 in the spring chamber to store energy. Under the action of the closing inclined plate 5, when the universal ball at the upper end of the pin rod moves to the space between the switch rotary disk and the connecting cylinder, it presses the rear ends of the pin rods 6 to pass through the pin rod through hole 20 and enter the casing pin hole 19 of the steel casing, completing the docking and locking of the connecting cylinder and the steel casing.

[0047] (5) Start the rotary drilling rig to move the connecting cylinder and the steel casing to the pile position for pile construction.

[0048] (6) Use the quick-connect separation device to open and separate the connecting cylinder and the steel casing: Since the lower part of the implanted steel casing has been spun into the ground and the lower end of the connecting cylinder is already 0.5 - 1 m from the ground, before extending the steel casing, the connecting cylinder and the implanted steel casing should be manually separated. Manually pull the switch rod on the ground to drive the switch rotary disk to rotate clockwise (or pull the pull rope, so that the pull rope drives the switch rod through the pull ring in sequence). When the universal balls at the upper ends of the pin rods move to the front part inside the next corresponding opening hole 3 on the switch rotary disk, the pin rods lose the support of the inner end face of the switch rotary disk 1, the springs in the spring chamber expand when compressed, pushing the supporting plate to drive the pin rods to pop out towards the outside of the opening hole, driving the rear end faces of the pin rods to retract into the pin rod through hole 20, and the connecting cylinder moves up, completing the opening and separation of the connecting cylinder and the steel casing.

[0049] (7) Repeat steps (3) to (6) until the steel casing implantation operation is completed.

[0050] When using the quick-connect separation device to open and separate the connecting cylinder and the steel casing, it is also possible to manually pull the switch rod on the ground to drive the switch rotary disk to rotate counterclockwise to the front part inside the opening hole.

[0051] Embodiment 2: As Figure 5 shown, different from Embodiment 1, there is no switch rod on the outer wall of the switch rotary disk. The driving device of the switch rotary disk is: An annular rack 31 is fixedly welded to the upper part of the outer wall of the switch rotary disk 1. A motor 30 is provided on the cylinder body 15 at the upper end of the annular rack. The motor can be a stepper motor. A driving gear 29 is provided on the motor shaft, and the driving gear meshes with the annular rack. When in use, the motor is connected to the power supply, the motor is controlled to open and close, and the switch rotary disk 1 is driven to rotate clockwise through the driving gear driving the annular rack, completing the connection or separation of the connecting cylinder and the steel casing.

[0052] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A quick connection and separation method for connecting a pattern cylinder and a steel casing, Characterized in that, It includes the following steps: (1) Prepare a rotary drilling rig, a steel casing, and a drilling bucket used for the rotary drilling rig at the construction site, and fabricate a connecting pattern cylinder with a quick connection and separation device; The connecting pattern cylinder with a quick connection and separation device includes a cylinder body, a protective ring, a top plate, a U-shaped groove, a connecting square cylinder, and a pin rod through hole. A quick connection and separation device for enabling each pin rod inside the lower end of the connecting pattern cylinder to be quickly connected and separated from each steel casing pin hole at the upper end of the steel casing is provided on the outer wall of the lower part of the cylinder body of the connecting pattern cylinder. The quick connection and separation device is composed of a switch rotating disk, an opening hole, a closing inclined plate, a spring chamber, a spring, a pin rod, a switch rod, and a pin rod through hole. A number of circumferentially evenly distributed pin rod through holes are provided on the outer wall of the lower end of the cylinder body. The inner ends of each pin rod through hole penetrate through the cylinder wall from the outer wall of the cylinder body and extend into the cavity. A switch rotating disk is axially provided on the outer wall of the lower part of the cylinder body outside each pin rod through hole. Opening holes are provided on the switch rotating disk at positions corresponding to each pin rod through hole and are distributed at intervals. The rear end edge of the opening hole is integrally connected with the rear end edge of the closing inclined plate. The front end edge of the closing inclined plate is obliquely arranged forward and outside and is located in the middle space of the opening hole. A spring chamber is provided outside each pin rod through hole. The inner diameter of the spring chamber is larger than the inner diameter of the pin rod through hole. The spring is located in the spring chamber. A top support plate is provided on the outer side of each pin rod. The pin rod inside the top support plate is located in the pin rod through hole. Each pin rod inside the top support plate penetrates through each spring chamber and the pin rod through hole from the outer wall of the cylinder body and extends into the cavity. The top support plates of each pin rod enclose the spring in the spring chamber. A through hole for the pin rod to pass through is provided in the middle of the cover plate. The top support plates of each pin rod are enclosed in the spring chamber through the cover plate. The cover plate is fixed on the outer wall of the cylinder body outside each pin rod through hole by screws. The pin rod outside the top support plate protrudes outside the outer wall of the cylinder body through the through hole on the cover plate. A pulling device for moving the switch rotating disk is provided on the outer wall of the switch rotating disk; The pulling device is: A number of switch rods are circumferentially distributed at intervals on the outer wall of the switch rotating disk, and a pull ring is provided at the outer end of the switch rod; or the pulling device is: A ring gear is provided on the upper part of the outer wall of the switch rotating disk, a motor is provided on the cylinder body at the upper end of the ring gear, a driving gear is provided on the motor shaft, and the driving gear meshes with the ring gear; One end of a pull rope with a length of several meters is fixed to the pull ring of the switch rod. A number of top support pulleys are circumferentially distributed at intervals on the outer wall of the cylinder body at the lower end of the switch rotating disk. The lower end of the switch rotating disk is slidably fitted on each top support pulley. The opening hole is a long strip-shaped hole. The pin rod outside the top support plate protrudes outside the outer wall of the cylinder body through the through hole on the cover plate. The height of the pin rod protruding outside the outer wall of the cylinder body is greater than the thickness of the switch rotating disk and less than the height of the front surface of the front end edge of the closing inclined plate. The rear end edge of the opening hole is a forward inclined bevel with the same slope as the inner side surface of the rear end edge of the closing inclined plate. Universal balls are provided on the outer end surfaces of each pin rod; (2) Fix and connect the lower end of the drill pipe of the rotary drilling rig with the connecting square cylinder at the upper end of the connecting flower cylinder through a locking pin. When on the ground, fix one end of the pull rope to the pull ring of the switch rod. The fixed pull ropes are two distributed on the opposite side pull rings, or three distributed on the triangular side pull rings, or four distributed on the quadrangular side pull rings. The length of each pull rope is greater than the height of the steel casing. At this time, the quick-connect separation device is in the closed state, the springs in each spring chamber are stretched, and each pin rod on the outer side of the top plate protrudes into the outer space of the opening hole. The inner end surface of each pin rod is flush with the inner end surface of the pin rod through hole; (3) Start the rotary drilling rig to move the connecting flower cylinder to the upper end of the steel casing. Align the lower port of the cylinder body of the connecting flower cylinder with the upper end of the steel casing. The drill pipe drives the connecting flower cylinder to move down. When the U-shaped groove of the connecting flower cylinder is limited and fixed with the positioning rod on the steel casing, the pin rod through holes on the connecting flower cylinder are aligned and penetrated with the casing pin holes at the corresponding positions of the steel casing; (4) Use the quick-connect separation device to dock and lock the connecting flower cylinder and the steel casing: Manually pull the pull rope on the ground, so that the pull rope drives the switch rotating disk to rotate clockwise through the pull ring and the switch rod in sequence, so that the upper parts of the pin rods located in the outer space of each opening hole move to the lower surface of the closing inclined plate at the rear part inside the opening hole. The lower inclined surface of the lower end of the closing inclined plate presses the universal ball at the upper end of the pin rod, so that the pin rod moves into the casing pin hole along the spring chamber and the pin rod through hole, and the top plate on it compresses the spring in the spring chamber to store energy. Under the action of the closing inclined plate, when the universal ball at the upper end of the pin rod moves to the space between the switch rotating disk and the connecting flower cylinder, it presses the rear end of each pin rod to pass through the pin rod through hole and enter the casing pin hole of the steel casing, completing the docking and locking of the connecting flower cylinder and the steel casing; (5) Start the rotary drilling rig to move the connecting flower cylinder and the steel casing to the pile position for pile construction; (6) Use the quick-connect separation device to open and separate the connecting flower cylinder and the steel casing: Since the lower part of the implanted steel casing has been spun into the ground and the lower end of the connecting flower cylinder is 0.5 - 1 m from the ground, before lengthening the steel casing, the connecting flower cylinder and the implanted steel casing should be manually separated. Manually pull the switch rod on the ground to drive the switch rotating disk to rotate clockwise or pull the pull rope to drive the switch rod through the pull ring in sequence. When the universal ball at the upper end of each pin rod moves to the front part inside the next corresponding opening hole in the switch rotating disk, each pin rod loses the support of the inner end surface of the switch rotating disk, the spring in the spring chamber is stretched, pushing the top plate to drive the pin rod to pop out towards the outside of the opening hole, driving the rear end surface of each pin rod to retract into the pin rod through hole, completing the opening and separation of the connecting flower cylinder and the steel casing; (7) Repeat steps (3) to (6) until the steel casing implantation operation is completed.

2. The quick-connect separation method of the connecting flower cylinder and the steel casing according to claim 1, characterized in that: When using the quick-connect separation device to open and separate the connecting flower cylinder and the steel casing, it is possible to manually pull the switch rod on the ground to drive the switch rotating disk to rotate counterclockwise to the front part inside the opening hole.

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