Mechanical connection joint and precast pile connection structure

Abstract

The utility model discloses a mechanical connector and a precast pile connecting structure. The mechanical connector comprises a pre-pressing guide rod provided with a plug, a fixed positioning sleeve, a pre-pressing taper sleeve, an elastic piece and a blocking piece, wherein the fixed positioning sleeve, the pre-pressing taper sleeve, the elastic piece and the blocking piece are arranged in a containing space. The plug of the pre-pressing guide rod can be inserted into the fixed positioning sleeve and is clamped with the elastic sheet; before the plug of the pre-pressing guide rod is inserted into the fixed positioning sleeve, the elastic piece can be compressed in the containing space through the blocking piece, and the pre-pressing taper sleeve is located between the end of the elastic piece and the elastic piece. In the process that the plug is inserted into the fixed positioning sleeve, the plug applies thrust to the blocking piece to relieve compression of the blocking piece to the elastic piece, and the elastic piece rebounds to push the pre-pressing taper sleeve to move towards one side of the elastic piece so that the pre-pressing taper sleeve can be hooped on the outer side of the elastic piece. According to the mechanical connection joint disclosed by the utility model, the pre-pressing taper sleeve is arranged and can be hooped on the outer side wall of the elastic sheet after the elastic sheet is clamped with the plug, so that the elastic sheet is prevented from being radially opened, the clamping performance of the elastic sheet and the plug is effectively improved, the connection performance of the mechanical connection joint is improved, and seamless connection is realized.

Description

Technical Field

[0001] This utility model relates to the field of precast pile technology, and in particular to a mechanical connection joint and a precast pile connection structure. Background Technology

[0002] In recent years, precast concrete components have been widely used in the construction industry. When using precast concrete components, it is often necessary to connect multiple components, which has led to the development of connection structures such as mechanical plug joints. Mechanical joints are increasingly favored by producers and users in the industry due to their ease of insertion and excellent pull-out and corrosion resistance. However, existing joints have the following problems: when the plug rod is subjected to large pull-out forces, the spring plate of the existing spring-loaded mechanical connection joint will open radially under the force of the plug, thereby reducing the snap-fit ​​performance between the plug and the spring plate, reducing the connection strength between the mechanical connection joints, and affecting the connection performance of precast piles. Utility Model Content

[0003] This utility model proposes a mechanical connection joint to address the above-mentioned problems.

[0004] The technical means adopted in this utility model are as follows:

[0005] A mechanical connection joint includes: a preload guide rod, a fixed positioning sleeve, a preload cone sleeve, an elastic element, and a baffle plate;

[0006] One end of the preload guide rod is equipped with a plug;

[0007] The fixed positioning sleeve is set in the accommodating space. The end of the fixed positioning sleeve facing the inside of the accommodating space has a plurality of circumferentially distributed spring pieces. One end of the plug of the pre-compression guide rod can be inserted into the fixed positioning sleeve and realize the engagement between the plug and the spring pieces.

[0008] The accommodating space is also provided with the pre-compression cone sleeve, the elastic element, and the baffle.

[0009] Before the plug of the pre-compression guide rod is inserted into the fixed positioning sleeve, the baffle can compress the elastic element within the accommodating space, so that the pre-compression cone sleeve can be located in the space between the end of the elastic piece of the fixed positioning sleeve and the elastic element;

[0010] During the insertion of the plug of the preload guide rod into the fixed positioning sleeve, the plug can apply a pushing force to the baffle to release the compression of the elastic element by the baffle, and push the preload cone sleeve to the side of the spring piece by the rebound of the elastic element so that the preload cone sleeve is clamped on the outside of the spring piece.

[0011] Furthermore, the inner taper of the pre-compression cone sleeve matches the outer taper of the spring piece.

[0012] Furthermore, the outer diameter of the pre-compression cone sleeve matches the inner diameter of the accommodating space.

[0013] Furthermore, the plug is provided with a plug engagement surface, and the spring is provided with a spring engagement surface. When the plug is inserted into the fixing and positioning sleeve, the plug engagement surface and the spring engagement surface engage with each other.

[0014] Furthermore, the preload guide rod also includes a preload guide rod fixing seat and a plug connection part, the plug connection part being used to connect the preload guide rod fixing seat and the plug;

[0015] The transition area between the plug connector and the plug is also provided with a snap-fit ​​edge clearance space.

[0016] Furthermore, the radial dimension of the area where the plug connection part connects to the plug is smaller than the radial dimension of the end where the plug connects to the plug connection part, forming the latching edge clearance space.

[0017] Furthermore, the end of the plug away from the plug connection portion is also provided with a guide surface.

[0018] Furthermore, the baffle includes a baffle body and a broken card disposed on the outer peripheral sidewall of the baffle body;

[0019] The baffle body has a pre-compression cone sleeve receiving part on the side of the broken card near the fixed positioning sleeve, and an elastic element snap-fit ​​part on the side of the baffle body near the elastic element. Before the plug of the pre-compression guide rod is inserted into the fixed positioning sleeve, the end of the pre-compression cone sleeve receiving part abuts against the end of the spring piece, and the pre-compression cone sleeve can be fitted onto the pre-compression cone sleeve receiving part. One end of the elastic element is fitted onto the elastic element snap-fit ​​part and abuts against the broken card.

[0020] Furthermore, the baffle body is also provided with an injection hole, and the outer diameter of the pre-compression cone sleeve receiving part gradually increases from the end towards the broken card side.

[0021] A precast pile connection structure includes a first end plate and a second end plate disposed at both ends of the precast pile body, and also includes the mechanical connection joint described in this application. The first end plate is provided with a preload guide rod fixing hole, and the preload guide rod is installed on the first end plate. The second end plate is provided with a fixing positioning sleeve mounting hole. A countersunk hole is provided on the precast pile body at a position corresponding to the fixing positioning sleeve mounting hole. The fixing positioning sleeve mounting hole and the countersunk hole form the receiving space. The fixing positioning sleeve is installed on the second end plate and the elastic piece is placed in the countersunk hole. The preload cone sleeve, the elastic element, and the baffle are placed in the countersunk hole.

[0022] Adjacent precast pile sections are connected by the mechanical connection joint.

[0023] A precast pile connection structure includes a first nut sleeve and a second nut sleeve disposed at both ends of the precast pile body, and also includes the mechanical connection joint described in this application. The preload guide rod is installed on the first nut sleeve, the sleeve cavity of the second nut sleeve is the receiving space, the fixed positioning sleeve is installed in the second nut sleeve, and the second nut sleeve is also provided with the preload cone sleeve, the elastic element and the baffle.

[0024] Adjacent precast pile sections are connected by the mechanical connection joint.

[0025] Compared with the prior art, the mechanical connection connector disclosed in this utility model has the following beneficial effects: Since the mechanical connection connector disclosed in this utility model is provided with a pre-compression cone sleeve, and after the spring piece and the plug are engaged, the pre-compression cone sleeve can be clamped on the outer side wall of the spring piece to prevent the spring piece from opening radially, thereby effectively improving the engagement performance of the spring piece and the plug, improving the connection performance of the mechanical connection connector, and realizing a seamless connection. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the mechanical connection connector disclosed in this utility model, in which the plug and the spring are in a snap-fit ​​state;

[0027] Figure 2 This is a structural diagram of the mechanical connection connector disclosed in this utility model, with the plug and spring in an unengaged state;

[0028] Figure 3 This is a structural diagram of the fixed positioning sleeve in the mechanical connection joint disclosed in this utility model;

[0029] Figure 4 This is a structural diagram of the preload guide rod in the mechanical connection joint disclosed in this utility model;

[0030] Figure 5 for Figure 1 The enlarged view within the dashed box shows that when the spring contact and the plug are in the snap-fit ​​state, the edge of the spring contact snap-fit ​​surface is located in the clearance space.

[0031] Figure 6 This is a front view of the baffle in the mechanical connection joint disclosed in this utility model;

[0032] Figure 7 This is a cross-sectional view of the baffle in the mechanical connection joint disclosed in this utility model;

[0033] Figure 8 This is a front view of the pre-compression cone sleeve in the mechanical connection joint disclosed in this utility model;

[0034] Figure 9 This is a cross-sectional view of the pre-compression tapered sleeve in the mechanical connection joint disclosed in this utility model;

[0035] Figure 10 This is a structural diagram of a first embodiment of using the mechanical connection joint disclosed in this utility model for connecting precast piles;

[0036] Figure 11 This is a structural diagram of a second embodiment of using the mechanical connection joint disclosed in this utility model for connecting precast piles;

[0037] In the diagram: 1. Preload guide rod; 10. Plug; 11. Plug snap-fit ​​surface; 12. Preload guide rod fixing seat; 13. Plug connection part; 14. Snap-fit ​​edge clearance space; 15. Guide surface; 2. Fixed positioning sleeve; 20. Fixed positioning sleeve body; 21. Spring piece; 22. Spring piece snap-fit ​​surface; 23. Edge of spring piece snap-fit ​​surface; 3. Preload cone sleeve; 30. Inner cavity surface of preload cone sleeve; 4. Elastic element; 5. Baffle; 50. Baffle body; 51. Breaking card; 52. Preload cone sleeve receiving part; 53. Elastic element snap-fit ​​part; 54. Glue injection hole; 60. First nut sleeve; 61. Second nut sleeve; 62. First end plate; 63. Second end plate; 64. Preload guide rod fixing hole; 65. Fixed positioning sleeve mounting hole; 7. Precast pile body; 70. Countersunk hole; 71. Main reinforcement; 8. Receiving space. Detailed Implementation

[0038] like Figure 1 and Figure 2 As shown, the mechanical connection joint disclosed in this utility model includes: a preload guide rod 1, a fixed positioning sleeve 2, a preload cone sleeve 3, an elastic element 4, and a baffle 5;

[0039] One end of the preload guide rod 1 is provided with a plug 10;

[0040] The fixed positioning sleeve 2 is disposed in the accommodating space 8. The fixed positioning sleeve 2 has a plurality of circumferentially distributed spring pieces 21 at one end facing the inside of the accommodating space 8. One end of the plug 10 of the pre-compression guide rod 1 can be inserted into the fixed positioning sleeve 2 and the plug 10 and the spring pieces 21 can be engaged.

[0041] The accommodating space 8 is also provided with the pre-compression cone sleeve 3, the elastic element 4, and the baffle 5;

[0042] Before the plug 10 of the pre-compression guide rod 1 is inserted into the fixed positioning sleeve 2, the baffle 5 can compress the elastic element 4 in the accommodating space 8, so that the pre-compression cone sleeve 3 can be located in the space between the end of the spring piece 21 of the fixed positioning sleeve 2 and the elastic element 4.

[0043] During the process of inserting the plug 10 of the preload guide rod 1 into the fixed positioning sleeve 2, the plug 10 can apply a pushing force to the baffle 5 to release the compression of the elastic member 4 by the baffle 5, and push the preload cone sleeve 3 to move towards the side of the spring piece 21 by the rebound of the elastic member 4 so that the preload cone sleeve 3 is fitted around the outside of the spring piece 21.

[0044] Specifically, such as Figure 1 and Figure 2 As shown, the mechanical connection joint disclosed in this embodiment includes a preload guide rod 1, a fixed positioning sleeve 2, a preload cone sleeve 3, an elastic element 4, and a baffle 5; the preload guide rod 1 is installed on the first component, and the fixed positioning sleeve 2, the preload cone sleeve 3, the elastic element 4, and the baffle 5 are installed on the second component. The first component and the second component can be connected to each other through this mechanical connection joint. A plug 10 is provided at one end of the preload guide rod 1; a receiving space is provided in the second component, and the fixed positioning sleeve 2 is disposed in the receiving space 8, such as... Figure 3 As shown, the fixed positioning sleeve 2 includes a fixed positioning sleeve body 20 and a plurality of spring pieces 21 evenly distributed circumferentially at one end of the positioning sleeve body 20. In this embodiment, the spring pieces 21 are spring piece structures formed by multiple grooves machined along the axial direction at one end of the fixed positioning sleeve. The fixed positioning sleeve 2 has a plurality of circumferentially distributed spring pieces 21 at one end facing the interior of the receiving space 8. The spring pieces 21 can open and close radially. One end of the plug 10 of the pre-compression guide rod 1 can be inserted into the fixed positioning sleeve 2 and the plug 10 and the spring pieces 21 can be engaged. The receiving space 8 is also provided with a pre-compression cone sleeve 3, an elastic element 4 and a baffle 5. Before the fixed positioning sleeve 2 is inserted, the baffle 5 compresses the elastic element 4 within the accommodating space 8, allowing the pre-compression cone sleeve 3 to be positioned within the space between the end of the spring piece 21 of the fixed positioning sleeve 2 and the elastic element 4. In this embodiment, the elastic element is a spring. During the insertion of the plug 10 of the pre-compression guide rod 1 into the fixed positioning sleeve 2, the plug 10 causes the spring piece 21 to open radially, and the plug 10 applies a pushing force to the baffle 5 to release the compression of the elastic element 4 by the baffle 5. The spring piece 21 rebounds and clamps onto the plug, while the rebound of the elastic element 4 pushes the pre-compression cone sleeve 3 to move towards the side of the spring piece 21, causing the pre-compression cone sleeve 3 to clamp onto the outside of the spring piece 21. In this embodiment, because the pre-compression cone sleeve 3 is provided, and after the spring piece and the plug are engaged, the pre-compression cone sleeve can clamp onto the outer wall of the spring piece under the push of the elastic element, preventing the spring piece from opening radially. This effectively improves the engagement performance of the spring piece and the plug, enhances the connection performance of the mechanical connection joint, and achieves a seamless connection.

[0045] Furthermore, the inner taper of the pre-compression cone sleeve 3 matches the outer taper of the spring piece 21.

[0046] Specifically, in this embodiment, such as Figure 8 and Figure 9As shown, the pre-compression cone sleeve 3 is an annular sleeve structure. The inner cavity taper of the pre-compression cone sleeve 3 matches the taper of the outer wall of the spring piece 21. That is, the taper of the inner cavity surface 30 of the pre-compression cone sleeve is close to (slightly greater than or equal to) the taper of the outer wall of the spring piece. This allows the pre-compression cone sleeve 3 to effectively clamp the outer side of the spring piece 21 when it is pushed by the elastic element 4 and placed on the outer wall of the spring piece 21, so as to prevent the spring piece from opening radially under the action of external force, thereby effectively improving the connection performance of the mechanical connection joint of this application.

[0047] Furthermore, the outer diameter of the pre-compression cone sleeve 3 matches the inner diameter of the accommodating space 8.

[0048] Specifically, such as Figure 1 and Figure 2 As shown, the outer diameter of the pre-compression cone sleeve 3 is slightly smaller than (or equal to) the inner diameter of the receiving space 8, which allows the pre-compression cone sleeve to move easily within the receiving space 8. At the same time, the inner wall of the receiving space 8 can enhance the clamping ability of the pre-compression cone sleeve on the spring piece. Even if the pre-compression cone sleeve is damaged, it can still effectively clamp the spring piece, preventing the spring piece from opening radially, and further improving the connection performance of the mechanical connection joint.

[0049] Furthermore, the plug 10 is provided with a plug engagement surface 11, and the spring contact 21 is provided with a spring contact engagement surface 22. When the plug 10 is inserted into the fixed positioning sleeve 2, the plug engagement surface 11 and the spring contact engagement surface 22 engage with each other.

[0050] Specifically, both the plug 10 and the spring contact 21 can be provided with a locking tooth structure to achieve the locking engagement between the plug and the spring contact. Preferably, for example... Figure 3 and Figure 4 As shown, the plug 10 is provided with a plug engagement surface 11. The distance between the plug engagement surface 11 and the central axis of the plug gradually decreases from the end away from the pre-compression guide rod fixing seat 12 to the end near the pre-compression guide rod fixing seat 12. Further, it is preferable that the plug engagement surface is a conical surface. The spring piece 21 is provided with a spring piece engagement surface 22. The distance between the spring piece engagement surface 22 and the central axis of the fixing positioning sleeve gradually increases from the end of the spring piece 21 to the other end. Preferably, the shape of the spring piece engagement surface is adapted to the plug engagement surface to ensure the mutual engagement performance. In the preferred embodiment, the spring piece engagement surface is also a conical surface.

[0051] Furthermore, the preload guide rod 1 also includes a preload guide rod fixing seat 12 and a plug connection part 13, the plug connection part 13 being used to connect the preload guide rod fixing seat 12 and the plug 10;

[0052] The transition area between the plug connector 13 and the plug 10 is also provided with a snap-fit ​​edge clearance space 14.

[0053] Specifically, in this embodiment, such as Figure 4 and Figure 5 As shown, the plug connection portion 13 is a tapered cylindrical structure with a radial dimension that gradually increases from one end of the pre-compression guide rod fixing seat 12 to one end of the plug 10. A snap-fit ​​edge clearance space 14 is provided in the area where the plug connection portion 13 connects with the plug 10. Because of the snap-fit ​​edge clearance space 14, when the spring contact is snapped into the plug, the edge of the spring contact surface is located in the snap-fit ​​edge clearance space. This avoids the problem that the edge of the spring contact surface comes into contact with the plug connection portion 13, affecting the effective contact between the spring contact surface and the plug contact surface and thus reducing the connection strength. In this embodiment, the snap-fit ​​edge clearance space 14 not only ensures the effective contact between the spring contact surface and the plug contact surface to improve the connection performance, but also forms a tooth-like structure on the edge of the snap-fit ​​edge clearance space 14. This structure can increase the snap-fit ​​performance between the plug contact surface and the spring contact surface, further improving the connection performance of the mechanical connection joint and increasing the connection strength.

[0054] Furthermore, the radial dimension of the area where the plug connection portion 13 connects to the plug 10 is smaller than the radial dimension of the end where the plug 10 connects to the plug connection portion 13, forming the snap-fit ​​edge clearance space 14.

[0055] Specifically, the latching edge clearance space 14 can be a groove structure machined on the plug connection portion 13. Preferably, the dimension of the end of the plug connection portion 13 near the plug 10 is slightly smaller than the radial dimension of the end face of the plug 10 connected to the plug connection portion 13, so that a stepped structure is formed between the plug connection portion 13 and the plug 10. Thus, when the spring contact is latched with the plug, the edge 23 of the spring contact surface is located at the latching edge clearance space, allowing the spring contact surface and the plug contact surface to make more effective contact and improving the latching performance between the spring contact and the plug. At the same time, the edge (stepped structure) of the latching edge clearance space 14 forms a tooth-like structure, which can increase the latching performance between the plug contact surface and the spring contact surface, further improving the connection performance of the mechanical connection joint and increasing the connection strength.

[0056] Furthermore, the end of the plug 10 away from the plug connection portion 13 is also provided with a guide surface 15.

[0057] Specifically, in this embodiment, the end of the plug 10 is provided with a guide surface 15 whose radial dimension gradually increases from the end face to the snap-fit ​​surface. The guide surface 15 can be a conical surface or an arc surface. By setting the guide surface, the plug can be easily inserted into the fixed positioning sleeve 2 and the wear during the insertion process can be reduced to ensure the connection performance of the mechanical connection joint.

[0058] Furthermore, the baffle 5 includes a baffle body 50 and a broken card 51 disposed on the outer peripheral sidewall of the baffle body 50;

[0059] The baffle body 50 has a pre-compression cone sleeve receiving part 52 on the side of the broken card 51 near the fixed positioning sleeve 2, and an elastic element snap-fit ​​part 53 on the side of the broken card 51 near the elastic element 4. Before the plug 10 of the pre-compression guide rod 1 is inserted into the fixed positioning sleeve 2, the end of the pre-compression cone sleeve receiving part 52 abuts against the end of the spring piece 21, and the pre-compression cone sleeve 3 can be fitted onto the pre-compression cone sleeve receiving part 52. One end of the elastic element 4 is fitted onto the elastic element snap-fit ​​part 53 and abuts against the broken card 51.

[0060] Specifically, in this embodiment, such as Figure 6 and Figure 7 As shown, the baffle 5 includes a baffle body 50 as the main structure. The outer diameter of the baffle body 50 is smaller than the size of the accommodating space. A ring of crushing cards 51 is circumferentially arranged on the outer wall of the baffle body 50. Preferably, the baffle 5 is made of a relatively soft material such as plastic. The baffle body 50 and the crushing cards 51 are integrally formed. The thickness of the crushing cards 51 is small. The crushing cards are separated into multiple small baffle structures by cutting grooves, so that the crushing cards 51 are easily broken or bent when subjected to external impact. The radial dimension of the side of the baffle body 50 near the fixed positioning sleeve 2 is smaller than the inner diameter of the cone sleeve of the pre-compression cone sleeve 3. The radial dimension of the cavity forms the pre-compression cone sleeve receiving portion 52. The radial dimension of the side of the baffle body 50 near the elastic member 4 is smaller than the radial dimension of the inner diameter of the elastic member, forming the elastic member locking portion 53. This allows the baffle 4 to abut against the end of the spring piece 21 before the plug 10 is inserted into the fixing positioning sleeve 2. The pre-compression cone sleeve 3 is fitted onto the pre-compression cone sleeve receiving portion 52, and one end of the elastic member 4 is fitted onto the elastic member locking portion 53. As a result, the elastic member 4 is compressed within the receiving space 8 due to the resistance of the broken card 51. At the same time, the pre-compression cone sleeve 2 is located in the space between the spring piece 21 and the elastic member 4. When the plug 10 is inserted into the fixed positioning sleeve 2, the end of the plug 10 can push the baffle 5 to move towards the elastic element 4, thereby breaking or bending the card 51 to release the compression of the elastic element. Under the action of the restoring force, the elastic element 4 pushes the pre-compression cone sleeve 3 towards the spring piece 21, so that the pre-compression cone sleeve 3 is fitted on the outer wall of the spring piece 21, realizing the clamping of the pre-compression cone sleeve 3 on the spring piece 21, thereby effectively preventing the spring piece 21 from opening radially. Thus, after the plug 10 of the pre-compression guide rod 1 of the mechanical connection joint disclosed in this application is inserted into the fixed positioning sleeve 2, it is subjected to pulling and other forces, and the spring piece 21 will not open radially, improving the connection performance of the mechanical connection joint.

[0061] Furthermore, the baffle body 50 is also provided with an injection hole 54, and the outer diameter of the pre-compression cone sleeve receiving part 52 gradually increases from the end toward the broken card 51 side.

[0062] Specifically, such as Figure 7 As shown, an injection hole 54 is also provided inside the baffle body 50. The injection hole 54 penetrates the upper and lower sides of the baffle body 50. Due to the injection hole 54, epoxy resin and other structural adhesives can be easily injected into the accommodating space 8 through the fixing and positioning sleeve 2 before the pre-compression guide rod 1 is inserted into the fixing and positioning sleeve 2. The epoxy resin can pass through the injection hole and the baffle 5 to fill the accommodating space, thereby improving the connection performance of the mechanical joint. At the same time, since the outer diameter of the pre-compression cone sleeve accommodating part 52 gradually increases from the end to the broken card 51 side, that is, it has a frustum structure, it is easy for the pre-compression cone sleeve to separate from the baffle under the push of the elastic element, so that the pre-compression baffle is clamped on the outer wall of the spring piece.

[0063] A precast pile connection structure includes a first end plate 62 and a second end plate 63 disposed at both ends of a precast pile body 7, and also includes the mechanical connection joint described in this application. The first end plate 62 is provided with a pre-compression guide rod fixing hole 64, and the pre-compression guide rod 1 is installed on the first end plate 62. The second end plate 63 is provided with a fixing positioning sleeve mounting hole 65. The precast pile body 7 is provided with a countersunk hole 70 at a position corresponding to the fixing positioning sleeve mounting hole 65. The fixing positioning sleeve mounting hole 65 and the countersunk hole 70 form the receiving space 8. The fixing positioning sleeve 2 is installed on the second end plate 63 and the spring piece 21 is placed in the countersunk hole 70. The pre-compression cone sleeve 3, the elastic element 4, and the baffle 5 are placed in the countersunk hole 70.

[0064] Adjacent precast pile sections are connected by the mechanical connection joint.

[0065] Specifically, Figure 10This is a first embodiment of using the mechanical connection structure disclosed in this application for connecting precast piles. In this embodiment, the precast pile includes a precast pile body 7 and a reinforcing cage disposed within the precast pile body 7. The precast pile body 7 has a first end plate 62 and a second end plate 63 at both ends. The first end plate 62 and the second end plate 63 are respectively connected to the two ends of the main reinforcing bars of the reinforcing cage. It also includes the mechanical connection joint described in this application. The first end plate 62 has a pre-compression guide rod fixing hole 64, and the pre-compression guide rod 1 is installed on the first end plate 62. The second end plate 63 has a fixing positioning sleeve mounting hole 65. In this embodiment, both the first end plate 62 and the second end plate 63 can be standard end plates. Multiple main reinforcing bar fixing holes and threaded holes are evenly distributed circumferentially on the end plates, and the main reinforcing bar fixing holes and threaded holes are interconnected to form a similar... The precast pile has a gourd-shaped structure. The main reinforcement fixing hole is used to fix the end of the main reinforcement, and the threaded hole is used to connect with the preloading guide rod or the fixed positioning sleeve. The precast pile body 7 has a countersunk hole 70 at the position corresponding to the fixed positioning sleeve installation hole 65. The fixed positioning sleeve installation hole 65 and the countersunk hole 70 form a receiving space 8. The fixed positioning sleeve 2 is installed on the second end plate 63 and the spring piece 21 is placed in the countersunk hole 70. The preloading cone sleeve 3, the elastic element 4 and the baffle 5 are placed in the countersunk hole 70. Two adjacent precast pile sections are connected by a mechanical connection joint. That is, the preloading guide rod is installed on the threaded hole of the end plate at one end of the precast pile, and the fixed positioning sleeve is installed in the threaded hole of the end plate at the other end of the precast pile. The preloading cone sleeve 3, the elastic element 4 and the baffle 5 are set in the countersunk hole of the precast pile body. The two connected precast pile sections can be connected to each other through this mechanical connection joint. Furthermore, in order to further improve the connection performance between precast piles, structural adhesives such as epoxy resin are injected into the end face of the precast piles and into the sinkhole to improve corrosion resistance. At the same time, after the epoxy resin solidifies, it can effectively fill the space inside the mechanical joint, thereby improving the connection strength of the mechanical joint.

[0066] A precast pile connection structure includes a first nut sleeve 60 and a second nut sleeve 61 disposed at both ends of a precast pile body 7, and also includes the mechanical connection joint described in this application. The preload guide rod 1 is installed on the first nut sleeve 60, the sleeve cavity of the second nut sleeve 61 is the receiving space 8, the fixing and positioning sleeve 2 is installed in the second nut sleeve 61, and the second nut sleeve 61 is also provided with the preload cone sleeve 3, the elastic element 4, and the baffle 5.

[0067] Adjacent precast pile sections are connected by the mechanical connection joint.

[0068] Specifically, Figure 11This is a first embodiment of using the mechanical connection structure disclosed in this application for connecting precast piles. In this embodiment, the precast pile includes a precast pile body 7 and a reinforcing cage disposed within the precast pile body 7. The precast pile body 7 has a first nut sleeve 60 and a second nut sleeve 61 respectively connected to the two ends of the main reinforcing bars 71 of the reinforcing cage. A preload guide rod 1 is installed on the first nut sleeve 60. The sleeve cavity of the second nut sleeve 61 is a receiving space 8. A fixing and positioning sleeve 2 is installed in the second nut sleeve 61. The second nut sleeve 61 is also provided with a preload cone sleeve 3, an elastic element 4, and a baffle 5. In this embodiment, both the first nut sleeve and the second nut sleeve can be standard parts. Two adjacent precast pile sections are connected through the mechanical connection joint, that is, a preload guide rod is installed on the first nut sleeve of the precast pile, and a fixing and positioning sleeve, a preload cone sleeve 3, an elastic element 4, and a baffle 5 are installed on the second nut sleeve of the precast pile. Two connected precast pile sections can be connected to each other through this mechanical connection joint. Furthermore, in order to further improve the connection performance between precast piles, epoxy resin and other structural adhesives are injected into the end face of the precast piles and into the second nut sleeve to improve corrosion resistance. At the same time, after the epoxy resin solidifies, it can effectively fill the space inside the mechanical joint, thereby improving the connection strength of the mechanical joint.

[0069] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mechanical connection joint, characterized in that, include: Preload guide rod (1), fixed positioning sleeve (2), preload cone sleeve (3), elastic element (4) and baffle (5); The preload guide rod (1) is provided with a plug (10) at one end; The fixed positioning sleeve (2) is set in the accommodating space (8). The fixed positioning sleeve (2) has a plurality of circumferentially distributed spring pieces (21) at one end facing the inside of the accommodating space (8). One end of the plug (10) of the pre-compression guide rod (1) can be inserted into the fixed positioning sleeve (2) and the plug (10) and the spring pieces (21) can be engaged. The accommodating space (8) is also provided with the pre-compression cone sleeve (3), the elastic element (4) and the baffle (5); Before the plug (10) of the preload guide rod (1) is inserted into the fixed positioning sleeve (2), the baffle (5) can compress the elastic element (4) in the receiving space (8), so that the preload cone sleeve (3) can be located in the space between the end of the spring piece (21) of the fixed positioning sleeve (2) and the elastic element (4); During the process of inserting the plug (10) of the preload guide rod (1) into the fixed positioning sleeve (2), the plug (10) can apply a thrust to the baffle (5) to release the compression of the elastic member (4) by the baffle (5), and push the preload cone sleeve (3) to the side of the spring piece (21) by the rebound of the elastic member (4) so ​​that the preload cone sleeve (3) is fitted on the outside of the spring piece (21).

2. The mechanical connection joint according to claim 1, characterized in that: The inner taper of the pre-compression cone sleeve (3) matches the outer taper of the spring piece (21).

3. The mechanical connection joint according to claim 2, characterized in that: The outer diameter of the pre-compression cone sleeve (3) matches the inner diameter of the accommodating space (8).

4. The mechanical connection joint according to claim 3, characterized in that: The plug (10) is provided with a plug snap-fit ​​surface (11), and the spring piece (21) is provided with a spring piece snap-fit ​​surface (22). When the plug (10) is inserted into the fixed positioning sleeve (2), the plug snap-fit ​​surface (11) and the spring piece snap-fit ​​surface (22) snap together.

5. The mechanical connection joint according to claim 4, characterized in that: The preload guide rod (1) also includes a preload guide rod fixing seat (12) and a plug connection part (13), the plug connection part (13) being used to connect the preload guide rod fixing seat (12) and the plug (10). The transition area between the plug connection part (13) and the plug (10) is also provided with a snap-fit ​​edge clearance space (14).

6. The mechanical connection joint according to claim 5, characterized in that: The radial dimension of the area where the plug connector (13) connects to the plug (10) is smaller than the radial dimension of the end where the plug (10) connects to the plug connector (13), forming the snap-fit ​​edge clearance space (14).

7. The mechanical connection joint according to any one of claims 1 to 6, characterized in that: The baffle (5) includes a baffle body (50) and a broken card (51) disposed on the outer peripheral sidewall of the baffle body (50). The baffle body (50) has a pre-compression cone sleeve receiving part (52) on the side of the broken card (51) near the fixed positioning sleeve (2), and an elastic element snap-fit ​​part (53) on the side of the broken card (51) near the elastic element (4). Before the plug (10) of the pre-compression guide rod (1) is inserted into the fixed positioning sleeve (2), the end of the pre-compression cone sleeve receiving part (52) abuts against the end of the spring piece (21), and the pre-compression cone sleeve (3) can be fitted onto the pre-compression cone sleeve receiving part (52). One end of the elastic element (4) is fitted onto the elastic element snap-fit ​​part (53) and abuts against the broken card (51).

8. The mechanical connection joint according to claim 7, characterized in that: The baffle body (50) is also provided with an injection hole (54), and the outer diameter of the pre-compression cone sleeve receiving part (52) gradually increases from the end toward the broken card (51).

9. A precast pile connection structure, comprising a first end plate (62) and a second end plate (63) disposed at both ends of the precast pile body (7), characterized in that: It also includes the mechanical connection joint as described in any one of claims 1 to 8, wherein the first end plate (62) is provided with a preload guide rod fixing hole (64), the preload guide rod (1) is installed on the first end plate (62), the second end plate (63) is provided with a fixing positioning sleeve mounting hole (65), the precast pile body (7) is provided with a countersunk hole (70) at a position corresponding to the fixing positioning sleeve mounting hole (65), the fixing positioning sleeve mounting hole (65) and the countersunk hole (70) form the receiving space (8), the fixing positioning sleeve (2) is installed on the second end plate (63) and the spring piece (21) is placed in the countersunk hole (70), the preload cone sleeve (3), the elastic element (4) and the baffle (5) are placed in the countersunk hole (70); Adjacent precast pile sections are connected by the mechanical connection joint.

10. A precast pile connection structure, comprising a first nut sleeve (60) and a second nut sleeve (61) disposed at both ends of the precast pile body (7), characterized in that: It also includes the mechanical connection joint according to any one of claims 1 to 8, wherein the preload guide rod (1) is installed on the first nut sleeve (60), the sleeve cavity of the second nut sleeve (61) is the receiving space (8), the fixed positioning sleeve (2) is installed in the second nut sleeve (61), and the second nut sleeve (61) is also provided with the preload cone sleeve (3), the elastic element (4) and the baffle (5); Adjacent precast pile sections are connected by the mechanical connection joint.

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