High-strength tubular pile structure and production equipment thereof

Abstract

The invention belongs to the technical field of steel-concrete precast piles, and particularly relates to a high-strength tubular pile structure and production equipment thereof. According to the high-strength tubular pile structure, the connecting steel bars, the tensioning holes, the fixing ring units, the two-way telescopic ring units and the annular plate units with the holes are arranged on the end rings, so that the annular plate units with the holes are fixed in the length direction of the tubular pile structure in the radial fixing effect and are evenly distributed, and therefore the radial fixing effect of the annular plate units with the holes is improved. And the radial fixing effect has the advantages of uniformity and large effective area. In addition, the invention further provides production equipment of the tubular pile structure.

Description

Technical Field

[0001] The invention belongs to the technical field of steel-concrete prefabricated piles, and in particular relates to a high-strength pipe pile structure and production equipment thereof. Background Art

[0002] The structure of steel-concrete precast piles mainly includes steel mesh cages, end plates, and concrete pile bodies. The existing methods for improving the performance of steel-concrete precast piles mainly improve the structure of the steel mesh cages.

[0003] Generally, the preparation method of steel-concrete precast piles mainly includes the following steps: preparing steel mesh cages, assembling steel mesh cages and end plates, placing the above-mentioned assembly on a half-cut pipe mold, filling concrete, closing the other half-cut pipe mold, tensioning the steel mesh cages, rotating the mold, centrifugal forming, and demolding and curing.

[0004] Correspondingly, the above-mentioned production equipment refers to two half-split pipe molds used for the preparation of steel-concrete precast piles.

[0005] For example, a Chinese utility model patent with authorization announcement number CN220486910U and authorization announcement date 2024.02.13 discloses a steel cage structure for prestressed concrete pipe piles, including prestressed steel bars, the outside of the prestressed steel bars are fixedly connected with surrounding stirrups, both ends of the prestressed steel bars are fixedly connected with end plates, a connecting skeleton is arranged inside the prestressed steel bars, a skeleton connecting rod is fixedly connected in the middle of the connecting skeleton, a telescopic tube is arranged at one end of the skeleton connecting rod, the telescopic tube includes a telescopic tube body, a movable cavity is opened in the telescopic tube body, movable slide grooves are symmetrically opened on both sides of the movable cavity, the movable slide grooves are slidably connected with rod end sliders, and the rod end sliders are fixedly connected to one end of the skeleton connecting rod extending into the telescopic tube.

[0006] The beneficial effects of the steel cage structure in this utility model patent are generally as follows: the end plates at both ends of the pipe piles centrifugally formed by using the steel cage after pouring concrete will not tilt or deflect, thereby improving the production quality of the product.

[0007] However, in actual use, the steel cage structure still has at least the following disadvantages, which are also the technical problems to be solved by the present invention, namely: The connection skeleton structure has insufficient fixing strength in the length direction of the steel cage and is easily displaced by the impact of concrete, which ultimately causes the radial fixing effect it provides to be unevenly distributed in the length direction of the steel cage, and the overall radial fixing effect is poor.

[0008] Therefore, in summary, there is an urgent need for a new type of steel mesh cage structure in which the radial fixing structure is relatively fixed in position and not easy to shift within the steel mesh cage, so as to ensure that the final prepared steel-concrete precast pile has greater supporting stability.

[0009] Accordingly, in order to achieve the above-mentioned position stability effect, it is also necessary to improve the equipment used in the preparation and production of steel-concrete precast piles, that is, a half-split tube mold that is not easy to cause displacement of the radial fixing structure and even helps to further fix the radial fixing structure. Summary of the invention

[0010] The present invention provides a high-strength pipe pile structure, which can be provided with connecting steel bars, tensioning holes, fixing ring units, bidirectional telescopic ring units, and circular ring plate units with holes on the end ring, so that the radial fixing effect of the circular ring plate units with holes can be fixed in the length direction of the pipe pile structure and evenly distributed, thereby ensuring that the radial fixing effect has the advantages of being uniform and having a large effective area.

[0011] In addition, the present invention also provides a production equipment for the above-mentioned pipe pile structure, whose structure includes a half-split pipe mold, an end hole plate for tensioning, an outer ring, and protruding teeth. Its direct function is to increase the rotation speed of the half-split pipe mold, and its ultimate function is to fully press the holed circular ring plate unit onto the fixed ring unit or the bidirectional telescopic ring unit, so that the radial fixing effect of the holed circular ring plate unit can be fixed at a preset position, ensuring that all radial fixing effects on the pipe pile structure are evenly spaced.

[0012] The technical solution adopted by the present invention to solve the above-mentioned problem is: a high-strength pipe pile structure, including connecting steel bars, end rings, and tensioning holes, and also includes a fixed ring unit arranged on the end ring and sleeved with the connecting steel bars, a bidirectional telescopic ring unit sleeved on the connecting steel bars and used to lift the fixed ring unit, and a perforated circular ring plate unit snap-fitted on the fixed ring unit or the bidirectional telescopic ring unit and used to insert the connecting steel bars.

[0013] A further preferred technical solution is that the fixing ring unit includes a connecting rod arranged on the end ring, and a fixing ring arranged on the connecting rod and sleeved with the connecting steel bar.

[0014] A further preferred technical solution is that the bidirectional telescopic ring unit includes a central ring sleeved on the connecting steel bar, two sets of screws respectively arranged on two sides of the central ring, and an internally threaded tube arranged on the screws and used to support the fixed ring.

[0015] A further preferred technical solution is that the perforated annular plate unit includes an annular plate that is snap-fitted on the side surface of the fixed annular ring or the end surface of the internal threaded pipe or the side surface of the center annular ring, and an installation hole that is arranged on the annular plate and is used to insert the connecting steel bars.

[0016] A further preferred technical solution is that the perforated circular plate unit also includes a radially inclined plate which is arranged on the inner ring surface of the circular plate, and the radial inner end of which is inclined toward the fixed circular ring or the internal threaded tube or the central circular ring, and is used to fix the circular plate by centrifugal concrete pushing.

[0017] A further preferred technical solution is that the fixing ring unit further includes a limiting column which is arranged on the fixing ring and is used for sleeve-connecting the internal threaded tube.

[0018] A further preferred technical solution is that: the end ring is also provided with a reinforcement installation tube for inserting the connecting steel bars and the connecting rod.

[0019] A device for producing a high-strength pipe pile structure, the structure includes a half-cut pipe mold and an end hole plate for tensioning, an outer ring arranged on the end hole plate for tensioning and sleeved on the half-cut pipe mold, and protruding teeth arranged on the outer ring surface of the outer ring and used to increase the driving force of centrifugal concrete on the radial inclined plate by increasing the rotation speed of the half-cut pipe mold.

[0020] A further preferred technical solution is that it also includes two driving gears for engaging with the protruding teeth.

[0021] A further preferred technical solution is that it also includes a tensioning screw rod arranged on the tensioning end hole plate, and a screw-connecting plate arranged on the tensioning screw rod and used for connecting the end ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the structural diagram of the pipe pile in the present invention.

[0023] Figure 2 It is a schematic diagram of the position and shape of the reinforced installation pipe in the present invention.

[0024] Figure 3 It is a schematic diagram of the position structure of the fixed ring unit in the present invention.

[0025] Figure 4 It is a schematic diagram of the position of the annular plate on the fixed ring in the present invention.

[0026] Figure 5 It is a schematic diagram of the position of the bidirectional telescopic ring unit in the present invention.

[0027] Figure 6 It is a schematic structural diagram of the bidirectional telescopic ring unit in the present invention.

[0028] Figure 7 It is a schematic diagram of a usage of the radially inclined plate in the present invention.

[0029] Figure 8 It is a schematic diagram of another use of the radially inclined plate in the present invention.

[0030] Fig. 9 It is a structural diagram of the production equipment in the present invention.

[0031] Fig.10 It is a schematic diagram of the use of two half-cut tube molds in the prior art.

[0032] Fig.11 It is a schematic diagram of the position of the screw-on plate in the present invention.

[0033] Fig.12 Schematic diagram of the position and shape of the outer ring in the present invention.

[0034] Fig.13 Schematic diagram of the position and shape of the protruding teeth in the present invention.

[0035] Fig.14 It is a schematic diagram of the position of the driving gear in the present invention.

[0036] In the figure, the meanings of the symbols are as follows: Concrete pushing direction a; Connecting steel bar 1, end ring 2, tensioning hole 3; Fixed ring unit 4, bidirectional telescopic ring unit 5, perforated circular ring plate unit 6, reinforced mounting tube 7; On the connecting rod 401, there is a fixed ring 402 and a limiting column 403; Centering ring 501, screw 502, internal threaded tube 503; Circular ring plate 601, mounting hole 602, radial inclined plate 603; A half-cut tube mold 11 and an end orifice plate 12 for tensioning; Outer ring 13, protruding teeth 14, driving gear 15, tensioning screw 16, screw plate 17. DETAILED DESCRIPTION

[0037] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0038] As attached Figure 1-Figure 14 As shown, a high-strength pipe pile structure includes a connecting steel bar 1, an end ring 2, and a tensioning hole 3, and also includes a fixed ring unit 4 arranged on the end ring 2 and sleeved with the connecting steel bar 1, a bidirectional telescopic ring unit 5 sleeved on the connecting steel bar 1 and used to lift the fixed ring unit 4, and a perforated circular ring plate unit 6 that is clamped on the fixed ring unit 4 or the bidirectional telescopic ring unit 5 and used to insert the connecting steel bar 1.

[0039] In this embodiment, the connecting steel bars 1 and the end rings 2 are welded, screwed or snap-fitted for fixed connection. The number of the connecting steel bars 1 is 4-8, and the number of the end rings 2 is 2. The former are evenly spaced in the circumferential direction of the latter. The number of the tensioning holes 3 is 3-5, which are also evenly spaced in the circumferential direction of the end rings 2.

[0040] Among them, the number of the fixing ring units 4 is 2, which are welded or screwed to the end ring 2, the number of the bidirectional telescopic ring unit 5 is 1, which is arranged between the two fixing ring units 4, and the number of the perforated circular ring plate units 6 is at most 5, which are used to provide a radial fixing effect with full coverage and uniform spacing in the length direction of the pipe pile structure, so as to prevent the connecting steel bars 1 and the concrete pile body from disintegrating outward and collapsing inward.

[0041] What is important is that the fixed ring unit 4 or the bidirectional telescopic ring unit 5 can provide the perforated circular ring plate unit 6 with a limiting effect in the length direction of the pipe pile. Even when the concrete is being filled or centrifuged, the perforated circular ring plate unit 6 is not easily displaced and its position is always located at a predetermined, relatively suitable uniform interval.

[0042] For example, if there are five perforated circular plate units 6 , the distance between the end ring 2 and the perforated circular plate unit 6 and the distance between two adjacent perforated circular plate units 6 are substantially 1 / 6 of the length of the connecting steel bar 1 .

[0043] Finally, the entire pile structure is made of high-strength steel.

[0044] The fixing ring unit 4 includes a connecting rod 401 arranged on the end ring 2 and a fixing ring 402 arranged on the connecting rod 401 and sleeved with the connecting steel bar 1 .

[0045] In this embodiment, 3-5 connecting rods 401 are arranged on a single fixed circular ring 402, and the connecting rods 401, tensioning holes 3 and connecting steel bars 1 are arranged in a circle on the end ring 2, and the connecting rods 401 are at the outermost radial side.

[0046] Correspondingly, the inner diameter of the fixing ring 402 is smaller than the diameter of the perforated ring plate unit 6, ensuring that the former can block and limit the latter in the length direction of the pipe pile structure.

[0047] If the end ring 2 and the fixing ring unit 4 are already fixed as a whole before the installation of the holed circular ring plate unit 6 on the fixing circular ring 402, the holed circular ring plate unit 6 can only be engaged and blocked and fixedly installed on the side of the fixing circular ring 402 where the connecting rod 401 is not installed.

[0048] On the contrary, if attached Figure 3 As shown, the perforated circular plate unit 6 can be located on the left or right side of the fixed circular ring 402. Accordingly, it is precisely because the thickness of the fixed circular ring 402 is negligible compared to the length of the connecting steel bar 1, so the perforated circular plate unit 6 can be located on both sides of the fixed circular ring 402, which does not affect the uniform spacing and overall fixing effect of the perforated circular plate unit 6.

[0049] The bidirectional telescopic ring unit 5 includes a central ring 501 sleeved on the connecting steel bar 1, two sets of screws 502 respectively arranged on two sides of the central ring 501, and an internal threaded tube 503 arranged on the screws 502 and used to support the fixed ring 402.

[0050] In this embodiment, the centering ring 501 and the screw 502 are integrally formed, the screw 502 and the internal threaded tube 503 are threadedly connected, and the functions of the bidirectional telescopic ring unit 5 at least include: First, providing a maximum of three of the perforated circular plate units 6 with a limit boss function for the length of the pipe pile upward, so that the positions of the three perforated circular plate units 6 are not easily changed during the entire process of preparing the pipe pile; Second, when the pipe pile structure is fully or partially tensioned before entering the mold, the internal threaded tube 503 can support and lift the end ring 2 at both ends, thereby sharing the tension requirements of the external tensioning equipment.

[0051] Accordingly, the following points need to be noted when using the bidirectional telescopic ring unit 5: First, the internally threaded pipe 503 rotates and extends toward both ends of the screw rod 502, thereby achieving a jacking effect. This effect is generally good on the relatively long pipe pile, and is suitable for relatively short pipe piles with a length of less than 20 m. Second, one of the advantages of the bidirectional telescopic ring unit 5 is that the pipe pile structure can be used to produce pipe piles of all length specifications within a certain length range; Third, the boss position provided by the fixed ring 402 and the internal threaded tube 503 for the perforated circular ring plate unit 6 is fixed compared to the end ring 2, while the boss position provided by the center ring 501 may have a small left-right deviation, even for the pipe piles of the same length. However, the above-mentioned small deviation has little effect on the radial fixing effect of the perforated circular ring plate unit 6 that is as uniform, comprehensive and effective as possible, and can be ignored.

[0052] The perforated annular plate unit 6 includes an annular plate 601 that is clamped on the side of the fixed annular ring 402 or the end surface of the internal threaded tube 503 or the side of the central annular ring 501, and a mounting hole 602 that is arranged on the annular plate 601 and is used to insert the connecting steel bar 1.

[0053] In this embodiment, the center hole of the annular plate 601 is used for circulating concrete. Different annular plates 601 may have different outer diameters to ensure that sufficient and appropriate blocking and limiting effects in the length of the pile can be obtained on the fixed ring 402, the center ring 501 and the internal threaded tube 503 respectively.

[0054] The perforated annular plate unit 6 also includes a radially inclined plate 603 which is arranged on the inner ring surface of the annular plate 601, and the radial inner end is inclined toward the fixed annular ring 402 or the internal threaded tube 503 or the center annular ring 501, and is used to fix the annular plate 601 by centrifugal concrete pushing.

[0055] In this embodiment, the radial inner side of the radial inclined plate 603 is inclined toward the fixed ring 402, the center ring 501 and the internal threaded tube 503, so that when the rotating centrifugal concrete is attached to the inner ring surface of the mold, the concrete pushing direction a can more tightly press and fix the annular plate 601 on the fixed ring 402, the center ring 501 and the internal threaded tube 503.

[0056] Among them, after the circular ring plate 601 is combined with the radial inclined plate 603, even if the circular ring plate 601 accidentally leaves the fixed ring 402, the center ring 501 and the internal threaded tube 503 during the concrete filling process, the circular ring plate 601 can be "pressed back" to the preset position by the centrifugal force in the concrete pushing direction a.

[0057] In addition, 2-4 radially inclined plates 603 are arranged on a single annular plate 601, the radial length of the latter is ≤ 1 / 3 of the inner diameter of the annular plate 601, and the angle between the latter and the side plane of the former is 30-50°.

[0058] The fixing ring unit 4 further includes a limiting column 403 which is arranged on the fixing ring 402 and is used for sleeve-engaging the internal threaded tube 503 .

[0059] In this embodiment, no threads are arranged on the limiting column 403, and it is plugged into the internal threaded tube 503, so that when the internal threaded tube 503 lifts up the fixed ring 402, both of them have a relatively sufficient fixing effect in the radial direction, avoiding the problem of misalignment between the fixed ring unit 4 and the bidirectional telescopic ring unit 5, that is, the centers of the end ring 2, the fixed ring 402, the center ring 501 and the annular plate 601 are all in a colinear position relationship, and the internal threaded tube 503 is perpendicular to the fixed ring 402.

[0060] The end ring 2 is also provided with a reinforcement installation pipe 7 for inserting the connecting steel bar 1 and the connecting rod 401.

[0061] In this embodiment, the reinforcement installation tube 7 and the connecting steel bar 1 and the connecting rod 401 can be welded or screwed together, and the reinforcement installation tube 7 and the end ring 2 can be integrally formed or screwed together.

[0062] A device for producing a high-strength pipe pile structure, the structure includes a half-cut pipe mold 11 and an end hole plate 12 for tensioning, an outer ring 13 arranged on the end hole plate 12 for tensioning and sleeved on the half-cut pipe mold 11, and protruding teeth 14 arranged on the outer ring surface of the outer ring 13 and used to increase the driving force of centrifugal concrete on the radial inclined plate 603 by increasing the rotation speed of the half-cut pipe mold 11.

[0063] In this embodiment, the number of the half-cut pipe molds 11 is two. After the two are screwed together, the tensioning end hole plate 12 is first sealed, and then the entire mold is rotated, thereby allowing the concrete to be centrifugally formed.

[0064] The tensioning end orifice plate 12, the outer ring 13 and the protruding teeth 14 are integrally formed. The protruding teeth 14 are used to upgrade the original friction drive mode of the mold to meshing drive, so that the mold can obtain a proper and faster rotation speed.

[0065] Correspondingly, at this time, the driving force of the concrete on the radially inclined plates 603 is greater, ensuring that all of the radially inclined plates 603 can be fully pressed on and positioned on the fixed ring 402 , the center ring 501 and the internal threaded tube 503 .

[0066] For example, the speed of a 20m long, 50cm outer diameter concrete prestressed pipe pile during the rapid rotation period of centrifugal forming is about 100r / min. After the above-mentioned meshing method replaces the friction method, it can ensure that when the speed is increased by 10-30%, there is still no slippage between the mold and the drive wheel.

[0067] The production device also includes two drive gears 15 for engaging the protruding teeth 14 .

[0068] In this embodiment, the driving gear 15 is used to replace the smooth wheel in the prior art, so that the mold can obtain a higher rotation speed as needed and safely.

[0069] The production equipment further includes a tensioning screw 16 disposed on the tensioning end hole plate 12 , and a screw connection plate 17 disposed on the tensioning screw 16 and used for connecting the end ring 2 .

[0070] In this embodiment, the screw plate 17 and the end ring 2 are screwed together, and the tensioning screw 16 can directly pull the screw plate 17, and finally indirectly pull the connecting steel bar 1 to turn it into a prestressed steel bar.

[0071] At this time, the tensioning effect of the tensioning screw 16 on the connecting steel bar 1 can no longer be properly and auxiliaryly supported by the bidirectional telescopic ring unit 5, because the two half-cut pipe molds 11 have been closed and the operator can no longer rotate the internal threaded pipe 503.

[0072] However, it should be noted that the bidirectional telescopic ring unit 5, which has been slightly loosened and will in principle swing left and right, still has effective blocking and limiting effects on the side of the central ring 501 and the end of the internal threaded tube 503 on the annular plate 601. The above-mentioned slight changes in the blocking position do not affect the uniform separation and full coverage radial fixing effect of the perforated annular plate unit 6.

[0073] It is just right that the mold at this time can press the annular plate 601 back to the side surface of the center ring 501 and the end surface of the internal threaded tube 503 through a relatively high rotation speed, thereby avoiding a large displacement of the annular plate 601.

[0074] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A high-strength pipe pile structure, comprising a connecting steel bar (1), an end ring (2), and a tensioning hole (3), characterized in that: It also includes a fixed ring unit (4) arranged on the end ring (2) and sleeved with the connecting steel bar (1), a bidirectional telescopic ring unit (5) sleeved on the connecting steel bar (1) and used to lift up the fixed ring unit (4), and a perforated circular ring plate unit (6) snap-fitted on the fixed ring unit (4) or the bidirectional telescopic ring unit (5) and used to insert the connecting steel bar (1).

2. A high-strength pipe pile structure according to claim 1, characterized in that: The fixing ring unit (4) comprises a connecting rod (401) arranged on the end ring (2), and a fixing ring (402) arranged on the connecting rod (401) and sleeved with the connecting steel bar (1).

3. A high-strength pipe pile structure according to claim 2, characterized in that: The bidirectional telescopic ring unit (5) comprises a central circular ring (501) sleeved on the connecting steel bar (1), two sets of screw rods (502) respectively arranged on two side surfaces of the central circular ring (501), and an internally threaded tube (503) arranged on the screw rods (502) and used to support the fixed circular ring (402).

4. A high-strength pipe pile structure according to claim 3, characterized in that: The perforated annular plate unit (6) comprises an annular plate (601) which is arranged on the side of the fixed annular ring (402) or on the end surface of the internally threaded tube (503) or on the side of the central annular ring (501), and a mounting hole (602) which is arranged on the annular plate (601) and is used for inserting the connecting steel bar (1).

5. A high-strength pipe pile structure according to claim 4, characterized in that: The perforated annular plate unit (6) further comprises a radially inclined plate (603) which is arranged on the inner annular surface of the annular plate (601) and has a radial inner end inclined toward the fixed annular ring (402) or the internally threaded tube (503) or the central annular ring (501), and is used to fix the annular plate (601) by centrifugal concrete extrusion.

6. A high-strength pipe pile structure according to claim 3, characterized in that: The fixing ring unit (4) further comprises a limiting column (403) which is arranged on the fixing circular ring (402) and is used for sleeve-connecting the internally threaded tube (503).

7. The high-strength pipe pile structure according to claim 2, characterized in that: The end ring (2) is also provided with a reinforcement installation pipe (7) for inserting the connecting steel bar (1) and the connecting rod (401).

8. A device for producing a high-strength pipe pile structure as claimed in claim 5, comprising a half-cut pipe mold (11) and an end orifice plate (12) for tensioning, characterized in that: It also includes an outer ring (13) arranged on the tensioning end hole plate (12) and sleeved on the half-cut tube mold (11), and a protruding tooth (14) arranged on the outer ring surface of the outer ring (13) and used to increase the driving force of the centrifugal concrete on the radial inclined plate (603) by increasing the rotation speed of the half-cut tube mold (11).

9. The production equipment for high-strength pipe pile structure according to claim 8, characterized in that: It also includes two driving gears (15) for engaging with the protruding teeth (14).

10. The production equipment for high-strength pipe pile structure according to claim 8, characterized in that: It also includes a tensioning screw rod (16) arranged on the tensioning end hole plate (12), and a screw connection plate (17) arranged on the tensioning screw rod (16) and used for connecting the end ring (2).

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