Pipe fitting connecting device for steel pipe pile foundation

Abstract

The invention provides a pipe fitting connecting device for a steel pipe pile foundation, and relates to the technical field of steel pipe pile foundation construction. Two steel pipe bodies to be connected are arranged outside the steel pipe positioning connecting block; the number of the steel pipe clamping units is two, and the two steel pipe clamping units are installed on the steel pipe positioning connecting block. The number of the driving units is four, and the four driving units are installed on the two steel pipe clamping units. The number of the supporting units is four, and the four supporting units are installed in the steel pipe positioning connecting block. The number of the pushing units is four, and the four pushing units are installed in the steel pipe positioning connecting block. When a movable push rod moves outwards, three circular movable blocks can be pushed to move, so that three steel pipe inner wall supporting blocks are in contact with a steel pipe body, and the interior of the steel pipe body is supported; the problems that the interiors of the adjacent steel pipes cannot be supported, and the outer walls and the inner walls of the steel pipes cannot be clamped at the same time are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel pipe pile foundation construction, and more specifically, particularly relates to a pipe fitting connection device for a steel pipe pile foundation. Background Art

[0002] Steel pipe pile foundation is formed by combining steel pipes. A connecting device is required when combining the steel pipes. Steel pipe pile foundation can be used in situations where the terrain is steep and complex, large construction machinery has no working platform, and large steel cages are difficult to transport.

[0003] The steel pipe connection devices currently in use still have the following problems: 1. Generally, adjacent steel pipes are connected by clamps, which cannot support the interior of the adjacent steel pipes, reducing the connection effect of the steel pipes; 2. Usually, only the outer wall of the steel pipe can be clamped, and when connecting the steel pipes, the outer wall and the inner wall of the steel pipe cannot be clamped at the same time, which increases the difficulty of connecting the steel pipes. Summary of the invention

[0004] The disclosed embodiment relates to a pipe fitting connection device for a steel pipe pile foundation, which comprises a steel pipe clamping unit, a driving unit, a supporting unit and a pushing unit; when a movable pushing rod moves outward, it can push three circular movable blocks to move, so that the three steel pipe inner wall supporting blocks are in contact with the steel pipe body, thereby achieving internal support of the steel pipe body; the problem of being unable to support the interior of adjacent steel pipes and being unable to clamp the outer wall and inner wall of the steel pipe at the same time is solved.

[0005] In a first aspect of the present disclosure, there is provided a pipe connection device for a steel pipe pile foundation, comprising a steel pipe positioning connection block, a steel pipe clamping unit, a driving unit, a supporting unit and a pushing unit;

[0006] The outside of the steel pipe positioning and connecting block is provided with two steel pipe bodies to be connected; the steel pipe clamping units are provided with two groups, and the two groups of steel pipe clamping units are installed on the steel pipe positioning and connecting block, and the two groups of steel pipe clamping units are used to clamp the two steel pipe bodies; the driving units are provided with four groups, and the four groups of driving units are installed on the two groups of steel pipe clamping units;

[0007] There are four groups of support units in total, and the four groups of support units are installed inside the steel pipe positioning and connecting block. The four groups of support units are used to improve the connection stability of the two steel pipe bodies; there are four groups of pushing units in total, and the four groups of pushing units are installed inside the steel pipe positioning and connecting block. The four groups of pushing units are used to move the four groups of support units.

[0008] In at least some embodiments, the steel pipe clamping unit includes: an arc-shaped mounting plate; the arc-shaped mounting plate is fixedly mounted on the steel pipe positioning connection block, and the outer wall of the arc-shaped mounting plate is provided with two circles of stabilizing grooves.

[0009] In at least some embodiments, the steel pipe clamping unit also includes: a circular guide shaft and a steel pipe outer wall clamping plate; there are four circular guide shafts in total, and the four circular guide shafts are slidably mounted on the arc-shaped mounting plate; there are two steel pipe outer wall clamping plates in total, and the two steel pipe outer wall clamping plates are fixedly mounted on the inner ends of the four circular guide shafts; a row of conical protrusions are respectively provided on the inner sides of the two steel pipe outer wall clamping plates, and the inner sides of the two steel pipe outer wall clamping plates are in contact with the two steel pipe bodies.

[0010] In at least some embodiments, the steel pipe clamping unit also includes: a limit group retaining ring A and a support spring A; there are four limit group retaining rings A in total, and the four limit group retaining rings A are fixedly installed on the outer ends of four circular guide shafts; there are four support springs A in total, and the four support springs A are installed on the outside of the four circular guide shafts, and the four support springs A are located between the arc-shaped mounting plate and the four limit group retaining rings A.

[0011] In at least some embodiments, the steel pipe clamping unit also includes: a driving screw and a driving gear A; the driving screw is threadedly connected to the arc-shaped mounting plate and the steel pipe positioning connecting block, and the inner end of the driving screw is provided with a chamfer; the driving gear A is fixedly mounted on the outside of the driving screw.

[0012] In at least some embodiments, the driving unit includes: a threaded extrusion rod, a driving gear B and a movable stabilizing shaft; the threaded extrusion rod is threadedly connected to the arc-shaped mounting plate, and the inner end of the threaded extrusion rod is in contact with the clamping plate on the outer wall of the steel pipe; the driving gear B is fixedly mounted on the outside of the threaded extrusion rod, and the driving gear B is meshingly connected with the driving gear A; there are two movable stabilizing shafts, and the two movable stabilizing shafts are slidably mounted on the driving gear B; the inner ends of the two movable stabilizing shafts are provided with rounded corners, and the two movable stabilizing shafts are inserted into two stabilizing grooves.

[0013] In at least some embodiments, the driving unit further includes: a limit group retaining ring B and a support spring B; there are two limit group retaining rings B in total, and the two limit group retaining rings B are fixedly installed on the outside of the two movable stabilizing shafts; there are two support springs B in total, and the two support springs B are installed on the outside of the two movable stabilizing shafts, and the two support springs B are located between the driving gear B and the two limit group retaining rings B.

[0014] In at least some embodiments, the support unit includes: a circular movable block and a steel pipe inner wall support block; there are three circular movable blocks in total, and the three circular movable blocks are slidably installed on the steel pipe positioning and connecting block; there are three steel pipe inner wall support blocks in total, and the three steel pipe inner wall support blocks are fixedly installed on the outer ends of the three circular movable blocks; a row of conical protrusions are respectively provided on the outer sides of the three steel pipe inner wall support blocks, and the outer sides of the three steel pipe inner wall support blocks are in contact with the steel pipe body.

[0015] In at least some embodiments, the support unit also includes: a limit group retaining ring C and a support spring C; there are three limit group retaining rings C in total, and the three limit group retaining rings C are fixedly installed on the outside of the three circular movable blocks; there are three support springs C in total, and the three support springs C are installed on the outside of the three circular movable blocks, and the three support springs C are located on the outside of the three limit group retaining rings C.

[0016] In at least some embodiments, the pushing unit includes: a movable pushing rod, a limit group retaining ring D and a support spring D; the movable pushing rod is slidably installed on the steel pipe positioning connecting block, and the inner end of the movable pushing rod is provided with a rounded corner; the inner end of the movable pushing rod is in contact with the driving screw, and the outer wall of the movable pushing rod is in contact with three circular movable blocks; the limit group retaining ring D is fixedly installed on the steel pipe positioning connecting block; the support spring D is installed inside the steel pipe positioning connecting block, and the inner end of the support spring D is in contact with the movable pushing rod, and the outer end of the support spring D is in contact with the limit group retaining ring D.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, since the driving gear B is fixedly installed on the outside of the threaded extrusion rod, and the driving gear B is meshed and connected with the driving gear A, when the staff rotates the driving screw rod through the hexagonal wrench, the driving gear A drives the driving gear B to rotate, and the threaded extrusion rod can push the steel pipe outer wall clamping plate to move after rotating, so that the steel pipe outer wall clamping plate contacts the steel pipe body, thereby realizing the clamping connection of the steel pipe body;

[0019] In addition, because the two movable stabilizing shafts are slidably installed on the driving gear B, and the inner ends of the two movable stabilizing shafts are provided with rounded corners, and the two movable stabilizing shafts are inserted in the two stabilizing grooves, the driving gear B is elastically positioned to prevent the driving gear B from rotating. When the driving gear A drives the driving gear B to rotate, the two movable stabilizing shafts can move upward after being subjected to force; and because the two supporting springs B are installed on the outside of the two movable stabilizing shafts, and the two supporting springs B are located between the driving gear B and the two limit group retaining rings B, when the staff reversely rotates the driving screw with a hexagonal wrench, the threaded extrusion rod also reverses and resets, so that the clamping plate on the outer wall of the steel pipe is also reset upward, which is convenient for the steel pipe positioning connecting block to be connected or disassembled with the steel pipe body.

[0020] 2. In the present invention, since the inner end of the movable push rod is in contact with the driving screw rod, and the outer wall of the movable push rod is in contact with the three circular movable blocks, when the driving screw rod moves inward, the driving screw rod can push the movable push rod to move outward, and when the movable push rod moves outward, it can push the three circular movable blocks to move, so that the three steel pipe inner wall support blocks are in contact with the steel pipe body, thereby realizing the internal support of the steel pipe body and making the steel pipe body more stable after connection;

[0021] In addition, because the three support springs C are located on the outside of the three limit group retaining rings C, and the inner end of the support spring D is in contact with the movable push rod, and the outer end of the support spring D is in contact with the limit group retaining ring D, when the driving screw moves outward, the movable push rod is reset under the action of the support spring D, and the three steel pipe inner wall support blocks are reset under the action of the three support springs C, which facilitates the connection or disassembly of the steel pipe positioning connecting block and the steel pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0023] The drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0024] In the attached picture:

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the steel pipe clamping unit and the driving unit of the present invention.

[0027] Figure 3 The present invention Figure 2 Schematic diagram of the bottom perspective structure.

[0028] Figure 4 The present invention Figure 1 Schematic diagram of the left perspective structure.

[0029] Figure 5 The present invention Figure 4 Schematic diagram of the local enlarged structure of area A in the middle.

[0030] Figure 6 The present invention Figure 1 Schematic diagram of the central cut structure.

[0031] Figure 7 It is a structural schematic diagram of the steel pipe positioning connection block, the supporting unit and the pushing unit of the present invention.

[0032] Figure 8 It is a structural schematic diagram of the supporting unit and the pushing unit of the present invention.

[0033] Fig. 9 The present invention Figure 6 Schematic diagram of the local enlarged structure of area B in the middle.

[0034] Fig.10 The present invention Figure 6 Schematic diagram of the local enlarged structure of the C area in the middle.

[0035] List of reference numerals:

[0036] 1. Steel pipe positioning connection block;

[0037] 2. Steel pipe body;

[0038] 3. Steel pipe clamping unit; 301. Arc-shaped mounting plate; 3011. Stable groove; 302. Circular guide shaft; 303. Steel pipe outer wall clamping plate; 304. Limiting group retaining ring A; 305. Support spring A; 306. Driving screw rod; 307. Driving gear A;

[0039] 4. Driving unit; 401. Threaded extrusion rod; 402. Driving gear B; 403. Active stabilizing shaft; 404. Limiting group retaining ring B; 405. Support spring B;

[0040] 5. Support unit; 501. Circular movable block; 502. Steel pipe inner wall support block; 503. Limiting group retaining ring C; 504. Support spring C;

[0041] 6. Pushing unit; 601. Movable pushing rod; 602. Limiting group retaining ring D; 603. Support spring D. DETAILED DESCRIPTION

[0042] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0043] Example: Please refer to Figures 1 to 10 As shown: The present invention provides a pipe connection device for a steel pipe pile foundation, comprising a steel pipe positioning connection block 1, a steel pipe clamping unit 3, a driving unit 4, a supporting unit 5 and a pushing unit 6;

[0044] The outside of the steel pipe positioning and connecting block 1 is provided with two steel pipe bodies 2 to be connected; there are two sets of steel pipe clamping units 3, and the two sets of steel pipe clamping units 3 are installed on the steel pipe positioning and connecting block 1, and the two sets of steel pipe clamping units 3 are used to clamp the two steel pipe bodies 2; there are four sets of driving units 4, and the four sets of driving units 4 are installed on the two sets of steel pipe clamping units 3;

[0045] There are four groups of support units 5, and the four groups of support units 5 are installed inside the steel pipe positioning and connecting block 1. The four groups of support units 5 are used to improve the connection stability of the two steel pipe bodies 2; there are four groups of pushing units 6, and the four groups of pushing units 6 are installed inside the steel pipe positioning and connecting block 1. The four groups of pushing units 6 are used to move the four groups of support units 5.

[0046] In the present disclosure, Figure 2 , Figure 3 , Figure 5 As shown, the steel pipe clamping unit 3 includes: an arc-shaped mounting plate 301; the arc-shaped mounting plate 301 is fixedly mounted on the steel pipe positioning connection block 1, and the outer wall of the arc-shaped mounting plate 301 is provided with two circles of stabilizing grooves 3011; the steel pipe clamping unit 3 also includes: a circular guide shaft 302 and a steel pipe outer wall clamping plate 303; there are four circular guide shafts 302, and the four circular guide shafts 302 are slidably mounted on the arc-shaped mounting plate 301; there are two steel pipe outer wall clamping plates 303, and the two steel pipe outer wall clamping plates 303 are fixedly mounted on the inner ends of the four circular guide shafts 302; the inner sides of the two steel pipe outer wall clamping plates 303 are respectively provided with a row of conical protrusions, and the inner sides of the two steel pipe outer wall clamping plates 303 are in contact with the two steel pipe bodies 2; the steel pipe clamping unit Element 3 also includes: a limit group retaining ring A304 and a support spring A305; there are four limit group retaining rings A304, and the four limit group retaining rings A304 are fixedly installed on the outer ends of the four circular guide shafts 302; there are four support springs A305, and the four support springs A305 are installed on the outside of the four circular guide shafts 302, and the four support springs A305 are located between the arc-shaped mounting plate 301 and the four limit group retaining rings A304; the steel pipe clamping unit 3 also includes: a driving screw 306 and a driving gear A307; the driving screw 306 is threadedly connected to the arc-shaped mounting plate 301 and the steel pipe positioning connection block 1, and the inner end of the driving screw 306 is provided with a chamfer; the driving gear A307 is fixedly installed on the outside of the driving screw 306;

[0047] The driving unit 4 includes: a threaded extrusion rod 401, a driving gear B402 and a movable stabilizing shaft 403; the threaded extrusion rod 401 is threadedly connected to the arc-shaped mounting plate 301, and the inner end of the threaded extrusion rod 401 is in contact with the clamping plate 303 on the outer wall of the steel pipe; the driving gear B402 is fixedly installed on the outside of the threaded extrusion rod 401, and the driving gear B402 is meshed and connected with the driving gear A307; there are two movable stabilizing shafts 403, and the two movable stabilizing shafts 403 are slidably installed on the driving gear B402; the inner ends of the two movable stabilizing shafts 403 A rounded corner is provided, and two active stabilizing shafts 403 are inserted into two stabilizing grooves 3011; the driving unit 4 also includes: a limit group retaining ring B404 and a support spring B405; there are two limit group retaining rings B404, and the two limit group retaining rings B404 are fixedly installed on the outside of the two active stabilizing shafts 403; there are two support springs B405, and the two support springs B405 are installed on the outside of the two active stabilizing shafts 403, and the two support springs B405 are located between the driving gear B402 and the two limit group retaining rings B404;

[0048] Its specific function is as follows: because the driving gear B402 is fixedly installed on the outside of the threaded extrusion rod 401, and the driving gear B402 is meshed and connected with the driving gear A307, when the staff rotates the driving screw 306 through the hexagonal wrench, the driving gear A307 drives the driving gear B402 to rotate, and the threaded extrusion rod 401 can push the steel pipe outer wall clamping plate 303 to move after rotation, so that the steel pipe outer wall clamping plate 303 contacts the steel pipe body 2, and the clamping connection of the steel pipe body 2 is realized. In addition, because the two movable stabilizing shafts 403 are slidably installed on the driving gear B402, and the inner ends of the two movable stabilizing shafts 403 are provided with rounded corners, and the two movable stabilizing shafts 403 are inserted into the two stabilizing recesses The groove 3011 plays an elastic positioning role for the driving gear B402, preventing the driving gear B402 from rotating. When the driving gear A307 drives the driving gear B402 to rotate, the two movable stabilizing shafts 403 can move upward after being subjected to force; and because the two supporting springs B405 are installed on the outside of the two movable stabilizing shafts 403, and the two supporting springs B405 are located between the driving gear B402 and the two limit group retaining rings B404, when the staff reversely rotates the driving screw 306 with a hexagonal wrench, the threaded extrusion rod 401 also reverses and resets, so that the steel pipe outer wall clamping plate 303 also resets upward, which is convenient for the steel pipe positioning connection block 1 to be connected or disassembled with the steel pipe body 2.

[0049] In the present disclosure, Figures 6 to 10As shown, the support unit 5 includes: a circular movable block 501 and a steel pipe inner wall support block 502; there are three circular movable blocks 501, and the three circular movable blocks 501 are slidably installed on the steel pipe positioning connection block 1; there are three steel pipe inner wall support blocks 502, and the three steel pipe inner wall support blocks 502 are fixedly installed on the outer ends of the three circular movable blocks 501; the outer sides of the three steel pipe inner wall support blocks 502 are respectively provided with a row of conical protrusions, and the outer sides of the three steel pipe inner wall support blocks 502 are in contact with the steel pipe body 2; the support unit 5 also includes: a limit group retaining ring C503 and a support spring C504; there are three limit group retaining rings C503, and the three limit group retaining rings C503 are fixedly installed on the outside of the three circular movable blocks 501; there are three support springs C504, and the three support springs C50 4 is installed on the outside of the three circular movable blocks 501, and the three support springs C504 are located on the outside of the three limit group retaining rings C503; the pushing unit 6 includes: a movable pushing rod 601, a limit group retaining ring D602 and a support spring D603; the movable pushing rod 601 is slidably installed on the steel pipe positioning connection block 1, and the inner end of the movable pushing rod 601 is provided with a rounded corner; the inner end of the movable pushing rod 601 contacts the driving screw 306, and the outer wall of the movable pushing rod 601 contacts the three circular movable blocks 501; the limit group retaining ring D602 is fixedly installed on the steel pipe positioning connection block 1; the support spring D603 is installed inside the steel pipe positioning connection block 1, and the inner end of the support spring D603 contacts the movable pushing rod 601, and the outer end of the support spring D603 contacts the limit group retaining ring D602;

[0050] The specific function is as follows: because the inner end of the movable push rod 601 contacts the driving screw 306, and the outer wall of the movable push rod 601 contacts the three circular movable blocks 501, when the driving screw 306 moves inward, the driving screw 306 can push the movable push rod 601 to move outward, and when the movable push rod 601 moves outward, it can push the three circular movable blocks 501 to move, so that the three steel pipe inner wall support blocks 502 contact the steel pipe body 2, thereby realizing the internal support of the steel pipe body 2, making the steel pipe body 2 more stable after connection. Because the three supporting springs C504 are located on the outside of the three limiting group retaining rings C503, and the inner end of the supporting spring D603 is in contact with the movable pushing rod 601, and the outer end of the supporting spring D603 is in contact with the limiting group retaining ring D602, when the driving screw 306 moves outward, the movable pushing rod 601 is reset under the action of the supporting spring D603, and the three steel pipe inner wall supporting blocks 502 are reset under the action of the three supporting springs C504, which facilitates the connection or disassembly of the steel pipe positioning connecting block 1 and the steel pipe body 2.

[0051] The specific usage and function of this embodiment are as follows:

[0052] When the present invention is used, first insert the steel pipe positioning connection block 1 into two adjacent steel pipe bodies 2, and then use a hexagonal wrench to rotate the two driving screws 306. When the staff rotates the driving screw 306 with the hexagonal wrench, the driving gear A307 drives the driving gear B402 to rotate. After the threaded extrusion rod 401 rotates, it can push the steel pipe outer wall clamping plate 303 to move, so that the steel pipe outer wall clamping plate 303 contacts the steel pipe body 2, and the clamping connection of the steel pipe body 2 is realized. The setting of the two movable stabilizing shafts 403 plays an elastic positioning role for the driving gear B402, thereby preventing the driving gear B402 from rotating. When the driving gear A307 drives the driving gear B402 to rotate, the two movable stabilizing shafts 403 can move upward after being subjected to force; when the driving screw 306 moves inward, the driving screw 306 can push the movable push rod 601 to move outward. When the movable push rod 601 moves outward, it can push the three circular movable blocks 501 to move, so that the three steel pipe inner wall support blocks 502 are in contact with the steel pipe body 2, realizing the internal support of the steel pipe body 2, making the steel pipe body 2 more stable after connection. When the driving screw rod 306 moves outward, the movable push rod 601 is reset under the action of the support spring D603, and the three steel pipe inner wall support blocks 502 are reset under the action of the three support springs C504, which is convenient for the steel pipe positioning connection block 1 to be connected or disassembled with the steel pipe body 2; when the staff rotates the driving screw rod 306 in the opposite direction with a hexagonal wrench, the threaded extrusion rod 401 is also reset in the opposite direction, so that the steel pipe outer wall clamping plate 303 is also reset upward, which is convenient for the steel pipe positioning connection block 1 to be connected or disassembled with the steel pipe body 2.

[0053] In this article, there are a few points to note:

[0054] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0055] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0056] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A pipe connection device for a steel pipe pile foundation, comprising a steel pipe positioning connection block (1), a steel pipe clamping unit (3), a driving unit (4), a supporting unit (5) and a pushing unit (6); The steel pipe positioning connection block (1) is provided with two steel pipe bodies (2) to be connected outside; it is characterized in that: The steel pipe clamping units (3) are provided in two groups, and the two groups of steel pipe clamping units (3) are installed on the steel pipe positioning connection block (1), and the two groups of steel pipe clamping units (3) are used to clamp two steel pipe bodies (2); the driving units (4) are provided in four groups, and the four groups of driving units (4) are installed on the two groups of steel pipe clamping units (3); The support units (5) are provided in four groups in total, and the four groups of support units (5) are installed inside the steel pipe positioning connection block (1), and the four groups of support units (5) are used to improve the connection stability of the two steel pipe bodies (2); the pushing units (6) are provided in four groups in total, and the four groups of pushing units (6) are installed inside the steel pipe positioning connection block (1), and the four groups of pushing units (6) are used to move the four groups of support units (5).

2. A pipe connection device for steel pipe pile foundation according to claim 1, characterized in that: The steel pipe clamping unit (3) comprises: an arc-shaped mounting plate (301); the arc-shaped mounting plate (301) is fixedly mounted on the steel pipe positioning connection block (1), and the outer wall of the arc-shaped mounting plate (301) is provided with two circles of stabilizing grooves (3011).

3. A pipe connection device for steel pipe pile foundation according to claim 2, characterized in that: The steel pipe clamping unit (3) further comprises: a circular guide shaft (302) and a steel pipe outer wall clamping plate (303); a total of four circular guide shafts (302) are provided, and the four circular guide shafts (302) are slidably mounted on the arc-shaped mounting plate (301); a total of two steel pipe outer wall clamping plates (303) are provided, and the two steel pipe outer wall clamping plates (303) are fixedly mounted on the inner ends of the four circular guide shafts (302); a row of conical protrusions are respectively provided on the inner sides of the two steel pipe outer wall clamping plates (303), and the inner sides of the two steel pipe outer wall clamping plates (303) are in contact with the two steel pipe bodies (2).

4. A pipe connection device for steel pipe pile foundation according to claim 3, characterized in that: The steel pipe clamping unit (3) further comprises: a limit group retaining ring A (304) and a support spring A (305); the limit group retaining ring A (304) is provided with four in total, and the four limit group retaining rings A (304) are fixedly mounted on the outer ends of the four circular guide shafts (302); the support springs A (305) are provided with four in total, and the four support springs A (305) are mounted on the outside of the four circular guide shafts (302), and the four support springs A (305) are located between the arc-shaped mounting plate (301) and the four limit group retaining rings A (304).

5. A pipe connection device for steel pipe pile foundation according to claim 4, characterized in that: The steel pipe clamping unit (3) further comprises: a driving screw (306) and a driving gear A (307); the driving screw (306) is threadedly connected to the arc-shaped mounting plate (301) and the steel pipe positioning connection block (1), and the inner end of the driving screw (306) is provided with a chamfer; the driving gear A (307) is fixedly mounted on the outside of the driving screw (306).

6. A pipe connection device for steel pipe pile foundation according to claim 5, characterized in that: The driving unit (4) comprises: a threaded extrusion rod (401), a driving gear B (402) and a movable stabilizing shaft (403); the threaded extrusion rod (401) is threadedly connected to the arc-shaped mounting plate (301), and the inner end of the threaded extrusion rod (401) contacts the steel pipe outer wall clamping plate (303); the driving gear B (402) is fixedly mounted on the outside of the threaded extrusion rod (401), and the driving gear B (402) is meshedly connected to the driving gear A (307); there are two movable stabilizing shafts (403) in total, and the two movable stabilizing shafts (403) are slidably mounted on the driving gear B (402); the inner ends of the two movable stabilizing shafts (403) are provided with rounded corners, and the two movable stabilizing shafts (403) are inserted into two stabilizing grooves (3011).

7. A pipe connection device for steel pipe pile foundation according to claim 6, characterized in that: The driving unit (4) further comprises: a limit group retaining ring B (404) and a support spring B (405); two limit group retaining rings B (404) are provided, and the two limit group retaining rings B (404) are fixedly installed on the outside of the two movable stabilizing shafts (403); two support springs B (405) are provided, and the two support springs B (405) are installed on the outside of the two movable stabilizing shafts (403), and the two support springs B (405) are located between the driving gear B (402) and the two limit group retaining rings B (404).

8. A pipe connection device for steel pipe pile foundation according to claim 5, characterized in that: The support unit (5) comprises: a circular movable block (501) and a steel pipe inner wall support block (502); there are three circular movable blocks (501) in total, and the three circular movable blocks (501) are slidably mounted on the steel pipe positioning connection block (1); there are three steel pipe inner wall support blocks (502) in total, and the three steel pipe inner wall support blocks (502) are fixedly mounted on the outer ends of the three circular movable blocks (501); a row of conical protrusions are respectively arranged on the outer sides of the three steel pipe inner wall support blocks (502), and the outer sides of the three steel pipe inner wall support blocks (502) are in contact with the steel pipe body (2).

9. A pipe connection device for steel pipe pile foundation according to claim 8, characterized in that: The support unit (5) further comprises: a limit group retaining ring C (503) and a support spring C (504); the limit group retaining rings C (503) are provided in three pieces, and the three limit group retaining rings C (503) are fixedly mounted on the outside of the three circular movable blocks (501); the support springs C (504) are provided in three pieces, and the three support springs C (504) are mounted on the outside of the three circular movable blocks (501), and the three support springs C (504) are located on the outside of the three limit group retaining rings C (503).

10. A pipe connection device for steel pipe pile foundation according to claim 8, characterized in that: The pushing unit (6) comprises: a movable pushing rod (601), a limiting group retaining ring D (602) and a supporting spring D (603); the movable pushing rod (601) is slidably mounted on the steel pipe positioning connection block (1), and the inner end of the movable pushing rod (601) is provided with a rounded corner; the inner end of the movable pushing rod (601) contacts the driving screw (306), and the outer wall of the movable pushing rod (601) contacts the three circular movable blocks (501); the limiting group retaining ring D (602) is fixedly mounted on the steel pipe positioning connection block (1); the supporting spring D (603) is mounted inside the steel pipe positioning connection block (1), and the inner end of the supporting spring D (603) contacts the movable pushing rod (601), and the outer end of the supporting spring D (603) contacts the limiting group retaining ring D (602).

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