Combined pin connecting joint

Abstract

A combined type pin connecting joint comprises two pile bodies to be in butt joint, end plates are arranged at the opposite ends of the two pile bodies, a plurality of open grooves are formed in the opposite sides of the two end plates, the open grooves of the two end plates correspond one by one and penetrate to the peripheral walls of the corresponding end plates, limiting grooves with the width increased are formed in the far ends of the two corresponding open grooves, and the limiting grooves are matched with the limiting grooves. Every two corresponding open grooves are connected through a combined pin, each combined pin comprises two pin bodies and a pin inserting piece, the two pin bodies are arranged on the two sides of the open grooves in the width direction, the two ends of each pin body are inserted into the two open grooves respectively, and protruding parts are arranged at the two ends of each pin body respectively. The pin inserting piece is inserted between the two pin bodies so that the two protruding parts of the pin bodies can be clamped into the limiting grooves of the two corresponding open grooves respectively, and through the design of the combined pin, the connecting quality is guaranteed, and meanwhile the assembling difficulty can be lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of pile joint structures, in particular to a combined pin connection joint. Background Art

[0002] In places where there is a need for pull-out resistance, the connection between piles is generally constructed using traditional welding technology; however, welding work requires a lot of manpower, the labor intensity of welders is high, and welding is a special operation with occupational health hazards. At the same time, the quality of manual welding is easily affected by the working environment, resulting in poor connection stability and it is difficult to ensure the consistency of the bending strength of the joint.

[0003] In order to solve the problems related to traditional welding processes, mechanical connection joints have gradually been adopted on the market in recent years, such as the patents with publication numbers CN216515552U and CN217974343U, which use connecting blocks to achieve mechanical fixation between end plates; however, mechanical connection joints also have limitations: high-precision mechanical connection joints have high assembly accuracy requirements, which not only have high production costs, but also are difficult to construct and inconvenient to use; although low-precision mechanical connection joints reduce the difficulty of construction by lowering the accuracy requirements, there is often a large gap between the joint and the end plate, and the connection quality is difficult to guarantee. Utility Model Content

[0004] The utility model aims to provide a combined pin connection joint which can ensure the connection quality and reduce the assembly difficulty.

[0005] To solve the above problems, the utility model provides a combined pin connection joint, comprising two pile bodies to be connected, end plates are provided at opposite ends of the two pile bodies, and the outer peripheral wall of each end plate is provided with at least two grooves distributed along the circumferential direction, the grooves penetrate to the side of each end plate opposite to the other end plate, and the grooves on the two end plates correspond to each other, and the distal ends of the two corresponding grooves are provided with limit grooves with increased width, and the corresponding two grooves are connected by inserting a combined pin, the combined pin comprises two pin bodies and a pin insert, the two pin bodies are inserted at both sides of the width direction of the slots, and the two sides of the pin body in the height direction are respectively inserted into the corresponding two slots, and the pin insert is inserted between the two pin bodies to achieve the fastening of the pin body and the corresponding two slots.

[0006] The utility model also provides a pipe pile connection construction method, using the above-mentioned combined pin connection joint, comprising the following steps:

[0007] S1. Arrange the two pile bodies so that the end plates of the two pile bodies are aligned and fit together, and ensure that the grooves of the two end plates correspond one by one;

[0008] S2. Prepare a combination pin, each corresponding to the two slots are configured with a combination pin;

[0009] S3. Insert the two pin bodies of the combined pin into the corresponding two slots from the outer peripheral side of the end plate, and the two pin bodies are arranged on both sides of the slot width direction, and the two sides of each pin body in the height direction are respectively inserted into the corresponding two slots, and the two protrusions of the pin body are respectively snapped into the limit grooves of the corresponding two slots;

[0010] S4. Insert the pin insert of the combination pin between the two pin bodies, and make the two protrusions of the pin body be fastened to the corresponding two slotted limit grooves respectively, so as to fix the combination pin in the corresponding two slots.

[0011] The above scheme uses a combination pin to connect the two end plates, that is, first insert the two pin bodies of the combination pin into the corresponding two slots, and make the two pin bodies distributed along the width direction of the slots. Since the cross-sectional dimensions of the two pin bodies are smaller than the cross-sectional dimensions of the two slots, the pin bodies can be easily inserted into the slots, effectively reducing the difficulty of assembly; then the pin insert of the combination pin is driven between the two pin bodies, at which time the pin insert will prop open the two pin bodies, so that the two sides of the pin body in the height direction are respectively abutted and fastened with the groove walls of the corresponding two slots, at which time the gap between the pin body and the slot in the width direction is eliminated by the pin insert, and an interference fit is formed between the combination pin and the slot, finally realizing a stable connection between the two end plates. Compared with the prior art, the above scheme effectively reduces the difficulty of assembly while ensuring the connection quality by designing the combination pin, and has good practicality.

[0012] As an improvement to the structure, the distal ends of the corresponding two slots are provided with limiting grooves with increased width, and each of the two sides of the pin body in the height direction is provided with a protrusion, and the two protrusions of the pin body are respectively fastened to the limiting grooves of the corresponding two slots, so that the pin body is firmly connected with the corresponding two slots through the protrusion.

[0013] As an improvement to the structure, the widths of the corresponding two slotted limit grooves gradually increase in the direction away from each other, so that the groove walls in the width direction of the limit groove form an inclined surface or an arc surface, and the shape of the raised portion of the pin body matches the shape of the limit groove, so that a larger contact area can be formed between the limit groove and the raised portion, thereby effectively improving the connection strength.

[0014] As an improvement to the structure, the middle parts of the opposite sides of the two pin bodies are provided with embedding grooves parallel to the slots, and the two sides of the pin insert are provided with expansion parts facing the embedding grooves of the corresponding two pin bodies. The expansion parts on both sides of the pin insert are used to snap into the embedding grooves of the corresponding two pin bodies, so that the pin insert can better fasten the pin body through the snapping action of the expansion parts and the embedding grooves.

[0015] As an improvement to the structure, the cross-sectional shape of the embedding groove is rectangular, polygonal or semicircular, and the cross-sectional shape of the expansion portion is the same as the cross-sectional shape of the embedding groove.

[0016] In the above solution, the material of the pin insert and / or the expansion part is polyurethane, epoxy resin, rubber or metal, so that the pin insert and / or the expansion part has a micro-expansion deformation performance.

[0017] As an improvement to the structure, the cross-sectional dimensions of the pin insert gradually decrease along the insertion direction, thereby facilitating insertion.

[0018] As an improvement to the structure, a plurality of axially opened positioning holes are provided on opposite sides of the two end plates, and the positioning holes of the two end plates correspond to each other, and positioning pins are inserted into the two corresponding positioning holes; and as an improvement to the construction method, in step S1, before the two pile bodies are butt-jointed, the positioning pins are first inserted into the positioning holes of any end plate, and then the two pile bodies are butt-jointed, and the positioning pins are inserted into the two corresponding positioning holes on the two end plates, so as to realize the pre-positioning of the two end plates, thereby ensuring that the slots of the two end plates correspond to each other, so as to facilitate the subsequent assembly of the combination pins. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic front view of a modular pin connection joint (the dotted line represents perspective);

[0020] Figure 2 A schematic top view of two end plates of a modular pin-connected joint (dashed lines represent perspective);

[0021] Figure 3 A schematic diagram of the front view of two end plates of a combined pin-connected joint;

[0022] Figure 4 A schematic front view of a combined pin of a combined pin connection joint;

[0023] Figure 5 A schematic front view of a pin insert of a modular pin connection joint;

[0024] Figure 6 A schematic side view of a pin insert of a modular pin connection joint;

[0025] Figure 7 A schematic diagram of a positioning pin of a modular pin connection joint;

[0026] Figure 8 A perspective schematic diagram of a combined pin connection joint when the pile body and the end plate are circular;

[0027] Fig. 9 A perspective schematic diagram of a combined pin connection joint when the pile body and the end plate are square;

[0028] Fig.10 A perspective schematic diagram of a combined pin connection joint when the pile body and the end plate are hexagonal;

[0029] Fig.11 A perspective schematic diagram of a combined pin connection joint when the pile body and the end plate are H-shaped.

[0030] Description of reference numerals:

[0031] 1. Pile body; 2. End plate; 21. Slot; 22. Limiting groove; 23. Positioning hole; 3. Combination pin; 31. Pin body; 311. Protrusion; 312. Embedded groove; 32. Pin insert; 321. Expansion part; 4. Positioning pin. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. It should also be noted that all directional indications in the embodiments of the utility model (such as up, down, left, right, front, back, inside, outside) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] Example 1

[0034] See also Figure 1-Figure 8, a combined pin connection joint provided in Example 1 of the utility model comprises two pile bodies 1 to be connected, and end plates 2 are provided at opposite ends of the two pile bodies 1, characterized in that the outer peripheral wall of each end plate 2 is provided with at least two slots 21 distributed along the circumferential direction, the slots 21 penetrate to the side of each end plate 2 opposite to the other end plate 2, and the slots 21 on the two end plates 2 correspond to each other, and the corresponding two slots 21 are connected by inserting a combined pin 3, the combined pin 3 comprises two pin bodies 31 and a pin insert 32, the two pin bodies 31 are inserted into the two sides of the slot 21 in the width direction, and the two sides of the pin body 31 in the height direction are respectively inserted into the corresponding two slots 21, and the pin insert 32 is inserted between the two pin bodies 31 to realize the fastening of the pin body 31 and the corresponding two slots 21.

[0035] The above scheme uses a combination pin 3 to connect the two end plates 2, that is, first insert the two pin bodies 31 of the combination pin 3 into the corresponding two slots 21, and make the two pin bodies 31 distributed along the width direction of the slots 21, and because the cross-sectional dimensions of the two pin bodies 31 are smaller than the cross-sectional dimensions of the two slots 21, the pin bodies 31 can be easily inserted into the slots 21, effectively reducing the difficulty of assembly; then the pin insert 32 of the combination pin 3 is driven between the two pin bodies 31, at this time, the pin insert 32 will open the two pin bodies 31, so that the two sides of the pin body 31 in the height direction are respectively abutted and fastened with the groove walls of the corresponding two slots 21, at this time, the gap between the pin body 31 and the slot 21 in the width direction is eliminated by the pin insert 32, and an interference fit is formed between the combination pin 3 and the slot 21, and finally a stable connection between the two end plates 2 is achieved. Compared with the prior art, the above scheme effectively reduces the difficulty of assembly while ensuring the connection quality by designing the combination pin 3, and has good practicality.

[0036] For a clearer explanation, Figure 1 and Figure 8 As shown, in this embodiment, the two pile bodies 1 are both arranged vertically, and the lower end of the upper pile body 1 and the upper end of the lower pile body 1 are both provided with a transverse end plate 2, and the pile body 1 and the end plate 2 are both circular; the number of slots 21 on each end plate 2 is four and preferably distributed circumferentially, and the length direction of the slot 21 is parallel to the radial direction of the end plate 2, and the width direction of the slot 21 is perpendicular to the radial direction of the end plate 2; the two sides in the height direction of the pin body 31 of the combination pin 3 refer to the upper side and the lower side of the pin body 31 respectively, and the upper side of the pin body 31 is inserted into the upper end plate 2, and the lower side of the pin body 31 is inserted into the lower end plate 2. Of course, the number of slots 21 can be increased or decreased as needed, and the position of the slots 21 relative to the end plate 2 can also be modified as needed, which is not limited by the present design. Fig. 9In the example b, the pile body 1 and the end plate 2 are both square, and the number of the slots 21 of each end plate 2 is four; Fig.10 In the example c, the pile body 1 and the end plate 2 are both hexagonal, and the number of the slots 21 of each end plate 2 is six; Fig.11 In example d, the pile body 1 and the end plate 2 are both H-shaped, and the number of the slots 21 of each end plate 2 is two.

[0037] In order to improve the connection stability between the combination pin 3 and the slot 21, the distal ends of the corresponding two slots 21 are provided with a limit groove 22 with increased width, and each of the two sides of the pin body 31 in the height direction are respectively provided with a protrusion 311, and the two protrusions 311 of the pin body 31 are respectively fastened to the limit grooves 22 of the corresponding two slots 21, so that the pin body 31 is firmly connected with the corresponding two slots 21 through the protrusion 311.

[0038] As an improvement to the structure, the distal ends of the corresponding two slots are provided with limiting grooves with increased width, and each of the two sides of the pin body in the height direction is provided with a protrusion, and the two protrusions of the pin body are respectively fastened to the limiting grooves of the corresponding two slots, so that the pin body is firmly connected with the corresponding two slots through the protrusion.

[0039] To make the description more specific, the width direction of the slot 21 is defined as the left-right direction based on the slot 21. In this embodiment, the two pin bodies 31 of the combined pin 3 are inserted into the left and right parts of the corresponding two slots 21, wherein the left side of the pin body 31 located at the left part abuts against the left slot wall of the corresponding two slots 21, and the right side of the pin body 31 located at the right part abuts against the right slot wall of the corresponding two slots 21. The distal ends of the corresponding two slots 21 are provided with a limit groove 22 with an increased width, which means that the corresponding two slots 21 have a limit groove 22 with an increased width between the left slot wall and the right slot wall of the upper part of the slot 21, and a limit groove 22 with an increased width between the left slot wall and the right slot wall of the lower part of the slot 21; the upper and lower parts of the left side of the pin body 31 located at the left part are provided with a protrusion 311, and the upper and lower parts of the right side of the pin body 31 located at the right part are provided with a protrusion 311.

[0040] In this embodiment, the width of the limit groove 22 gradually increases in the direction away from each other, so that the left groove wall and the right groove wall of the limit groove 22 both form an inclined surface, or the left groove wall and the right groove wall of the limit groove 22 both form an arc surface; the shape of the protrusion 311 of the pin body 31 matches the shape of the limit groove 22, so that a larger contact area can be formed between the limit groove 22 and the protrusion 311, thereby effectively improving the connection strength.

[0041] As an improvement to the present embodiment, the middle of the height direction of the opposite sides of the two pin bodies 31 are provided with an embedding groove 312 parallel to the slot 21, and the left and right sides of the pin insert 32 are respectively provided with expansion parts 321 facing the embedding grooves 312 of the corresponding two pin bodies 31, and the expansion parts 321 on both sides of the pin insert 32 are used to be snapped into the embedding grooves 312 of the corresponding two pin bodies 31, so that the pin insert 32 can better fasten the pin body 31 through the snapping action of the expansion parts 321 and the embedding grooves 312. More specifically, the cross-sectional shape of the embedding groove 312 is rectangular, polygonal or semicircular, and the cross-sectional shape of the expansion part 321 is the same as that of the embedding groove 312.

[0042] As an improvement to the pin insert 32, the cross-sectional dimension of the pin insert 32 gradually decreases along the insertion direction, thereby facilitating insertion; it should be understood that the cross-sectional dimension of the pin insert 32 can be a single-finger width, a single-finger height, or both width and height.

[0043] In this embodiment, the pin insert 32 and the expansion part 321 are integrally formed, and the materials of the pin insert 32 and the expansion part 321 are polyurethane, epoxy resin, rubber, metal or alloy, so that they have micro-expansion deformation performance to better push the corresponding two pin bodies 31 to separate from each other; or the pin insert 32 can be processed first, and then the expansion part 321 is provided on the pin insert 32. At this time, the pin insert 32 and the expansion part 321 can be the same material or different materials, as long as any one of the materials of the pin insert 32 and the expansion part 321 is polyurethane, epoxy resin, rubber or metal; in addition, it should be noted that the metal referred to in this embodiment includes pure metal and alloy.

[0044] As an improvement to the present embodiment, a plurality of axially-opened positioning holes 23 are provided on opposite sides of the two end plates 2, and the positioning holes 23 of the two end plates 2 correspond to each other one by one; when the positions of the positioning holes 23 of the two end plates 2 correspond to each other one by one, the slots 21 of the two end plates 2 also correspond to each other one by one, so that pre-positioning is achieved by first inserting the positioning pins 4 into the two corresponding positioning holes 23 of the two end plates 2, so as to facilitate the subsequent assembly of the combination pins 3.

[0045] Example 2

[0046] Embodiment 2 of the present utility model provides a pipe pile connection construction method, which is applied to the combined pin connection joint described in Embodiment 1, and specifically includes the following steps:

[0047] S1. Arrange the two pile bodies 1 so that the end plates 2 of the two pile bodies 1 are aligned and fit, and ensure that the grooves 21 of the two end plates 2 correspond one by one;

[0048] S2. Prepare the combination pin 3, each corresponding to the two slots 21 is provided with a combination pin 3;

[0049] S3. Insert the two pin bodies 31 of the combined pin 3 into the corresponding two slots 21 from the outer peripheral side of the end plate 2, and the two pin bodies 31 are arranged on both sides of the slot 21 in the width direction, and both sides of each pin body 31 in the height direction are respectively inserted into the corresponding two slots 21, and the two protrusions 311 of the pin body 31 are respectively snapped into the limiting grooves 22 of the corresponding two slots 21;

[0050] S4. Insert the pin insert 32 of the combination pin 3 between the two pin bodies 31 , and make the two protrusions 311 of the pin body 31 be fastened to the limiting grooves 22 of the corresponding two slots 21 , so as to fix the combination pin 3 in the slots 21 .

[0051] Example 3

[0052] Embodiment 3 of the present utility model provides a pipe pile connection construction method, which is applied to the combined pin connection joint with the end plate 2 having the positioning hole 23 in Embodiment 1, and specifically comprises the following steps:

[0053] S1. Before the two pile bodies 1 are butted together, the positioning pins 4 are inserted into the positioning holes 23 of the lower end plates 2. Then, the two pile bodies 1 are butted together, and the positioning pins 4 are inserted into the corresponding two positioning holes 23 on the two end plates 2 to achieve pre-positioning of the two end plates 2, thereby ensuring that the slots 21 of the two end plates 2 correspond one by one.

[0054] S2. Prepare the combination pin 3, each corresponding to the two slots 21 is provided with a combination pin 3;

[0055] S3. Insert the two pin bodies 31 of the combined pin 3 into the corresponding two slots 21 from the outer peripheral side of the end plate 2, and the two pin bodies 31 are arranged on both sides of the slot 21 in the width direction, and both sides of each pin body 31 in the height direction are respectively inserted into the corresponding two slots 21, and the two protrusions 311 of the pin body 31 are respectively snapped into the limiting grooves 22 of the corresponding two slots 21;

[0056] S4. Insert the pin insert 32 of the combination pin 3 between the two pin bodies 31 , and make the two protrusions 311 of the pin body 31 be fastened to the limiting grooves 22 of the corresponding two slots 21 , so as to fix the combination pin 3 in the slots 21 .

[0057] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. For those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A combined pin connection joint, comprising two pile bodies (1) to be butted together, wherein the opposite ends of the two pile bodies (1) are provided with end plates (2), characterized in that: The outer peripheral wall of each end plate (2) is provided with at least two slots (21) distributed along the circumferential direction, the slots (21) penetrate to the side of each end plate (2) opposite to the other end plate (2), and the slots (21) on the two end plates (2) correspond to each other, and the two corresponding slots (21) are connected by inserting a combination pin (3), the combination pin (3) comprising two pin bodies (31) and a pin insert (32), the two pin bodies (31) are inserted into the two sides of the slot (21) in the width direction, and the two sides of the pin body (31) in the height direction are respectively inserted into the two corresponding slots (21), and the pin insert (32) is inserted between the two pin bodies (31) to achieve the fastening of the pin body (31) and the two corresponding slots (21).

2. A combined pin connection joint according to claim 1, characterized in that: The distal ends of the two corresponding slots (21) are each provided with a limiting slot (22) with an increased width, and both sides of each pin body (31) in the height direction are respectively provided with a protrusion (311), and the two protrusions (311) of the pin body (31) are respectively fastened to the limiting slots (22) of the two corresponding slots (21).

3. A combined pin connection joint according to claim 2, characterized in that: The widths of the limiting grooves (22) of the corresponding two slots (21) gradually increase in a direction away from each other, so that the groove walls of the limiting grooves (22) in the width direction form an inclined surface or an arc surface, and the shape of the raised portion (311) of the pin body (31) matches the shape of the limiting groove (22).

4. A combined pin connection joint according to claim 2, characterized in that: The middle parts of the opposite sides of the two pin bodies (31) are each provided with an embedding groove (312) parallel to the slot (21), and the two sides of the pin insert (32) are provided with expansion parts (321) facing the embedding grooves (312) of the two corresponding pin bodies (31), and the expansion parts (321) on both sides of the pin insert (32) are used to be snap-fitted into the embedding grooves (312) of the two corresponding pin bodies (31).

5. A combined pin connection joint according to claim 4, characterized in that: The cross-sectional shape of the embedding groove (312) is rectangular, polygonal or semicircular, and the cross-sectional shape of the expansion portion (321) is the same as the cross-sectional shape of the embedding groove (312).

6. A combined pin connection joint according to claim 4, characterized in that: The material of the pin insert (32) and / or the expansion portion (321) is polyurethane, epoxy resin, rubber or metal.

7. A combined pin connection joint according to any one of claims 1 to 6, characterized in that: The cross-sectional dimensions of the pin insert (32) gradually decrease along the insertion direction.

8. A combined pin connection joint according to any one of claims 1 to 6, characterized in that: A plurality of axially opened positioning holes (23) are provided on opposite sides of the two end plates (2), and the positioning holes (23) of the two end plates (2) correspond to each other, and positioning pins (4) are inserted into the two corresponding positioning holes (23).

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