An end plate anchorage wedge-cam mechanical joint and a precast concrete member
The design of the end plate anchoring wedge mechanical joint solves the problem of over-insertion or under-insertion of the insertion rod caused by the inclination of the pile end face in the connection of precast concrete components. It achieves stable connection and high-efficiency pull-out, bending and shear resistance, and is suitable for various types of precast concrete components.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING HENGJIN BUILDING MATERIALS CO LTD
- Filing Date
- 2026-06-25
- Publication Date
- 2026-08-04
AI Technical Summary
Existing mechanical joints in the connection of precast concrete components have problems such as over-insertion or under-insertion of the insertion rod due to the inclination of the pile end face, resulting in unstable connection, uneven stress on multiple joints, easy damage, and affecting service life and safety.
The mechanical joint adopts an end plate anchoring wedge type. Through the combination design of the insertion rod, wedge, and fixed positioning sleeve, the inner conical surface of the wedge and the insertion flange of the plug are in line contact. Combined with the function of the elastic element, a gapless connection is achieved, and the coaxiality of the insertion rod and the fixed positioning sleeve is ensured by the guide structure.
It achieves stable connection of precast concrete components, avoids gaps and cracks caused by improper insertion, improves pull-out, bending and shear resistance, ensures the reliability and safety of the connection, and is applicable to different types of precast concrete components.
Smart Images
Figure CN224591432U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precast concrete pile connection technology, and in particular to an end plate anchoring wedge mechanical joint and a precast concrete component. Background Technology
[0002] During the construction process, it is usually necessary to assemble or connect precast concrete components, especially precast concrete components, most of which are multi-section spliced piles. Currently, splicing and connecting precast concrete components is generally achieved through end plate welding or mechanical joints for rapid connection.
[0003] However, existing mechanical joints have the following problems: the end face of the pile has a certain degree of inclination. The national standard GB13476-2009 specifies the allowable deviation for pipe pile dimensions as follows: for pipe piles with a diameter of 300mm to 700mm, the allowable inclination distance is -2mm to +5mm; for pipe piles with a diameter of 800mm to 1400mm, the allowable inclination distance is -4mm to +7mm. Therefore, when two piles (with a diameter between 300mm and 700mm) are joined, considering only the inclination of one pile end face, there will be a maximum gap of 5mm. When the pile end face is inclination, using existing mechanical joints for concrete pile connection will result in the insertion rod being over-inserted or under-inserted into the clamping device. When the insertion rod of the mechanical joint is over-inserted into the clamping device, there will be an axial gap between the joint of the insertion rod and the clamping device. This will cause a corresponding gap between the connecting end faces of the precast concrete components when subjected to pull-out forces, thus affecting the service life of the precast concrete components. Alternatively, when a concrete pile is subjected to pull-out force, the multiple mechanical joints on the end face of the precast concrete component are subjected to force at different times. That is, one or two mechanical joints on the end face of the precast concrete component are subjected to force first, while the other mechanical joints are not subjected to force. Therefore, the mechanical joints subjected to force first will be damaged first. After the mechanical joints subjected to force first are damaged, the other mechanical joints will be subjected to force in sequence (that is, only one or two mechanical joints are subjected to force at the same time during the entire pull-out process), and may be damaged in sequence. When the insert of the mechanical joint is not fully inserted into the clamping device, the insert and the connector may not be able to clamp together, which will cause the connection of the precast concrete component to fail (only one or two mechanical joints at the lower end of the end face of the precast concrete component may be able to clamp together). Utility Model Content
[0004] This utility model addresses the problems existing in the prior art by proposing an end plate anchoring wedge mechanical joint and a precast concrete component.
[0005] An end-plate anchoring wedge-type mechanical joint for mechanical connection of precast concrete components with end plates, comprising: a plug rod, a wedge, an elastic element, and a fixing and positioning sleeve; The insertion rod includes an insertion rod seat, a plug, and a plug connecting section. The insertion rod seat is provided with an external thread for threaded connection with an end plate. An insertion rod neck is provided between the plug connecting section and the plug. The outer diameter of the insertion rod neck is smaller than the outer diameter of the plug connecting section. The plug is provided with a plug snap-fit flange. The wedge is provided with an outer side surface, an inner conical surface, an outer conical surface, and a wedge end face; One end of the fixed positioning sleeve is a plug insertion end, and the other end is a wedge snap-fit end. The inner cavity of the wedge snap-fit end is provided with a tapered positioning surface. The outer wall of the fixed positioning sleeve is provided with a first end plate connecting part for threaded connection with the end plate. The fixed positioning sleeve has two or more wedges and an elastic element that abuts against the end face of the wedge and can apply elastic force to the wedge; The plug can be inserted into the space formed by two or more wedges from the plug insertion end. Under the elastic force of the elastic element, the wedges enter the space between the conical positioning surface and the neck of the plug rod, so that the outer conical surface of the wedge abuts against the conical positioning surface of the fixed positioning sleeve, and the plug engagement flange of the plug forms a line contact with the inner conical surface of the wedge.
[0006] Furthermore, the plug snap-fit flange has one or more flanges.
[0007] Furthermore, a first transition surface is provided between the plug connection section and the plug neck; The relationship between the length of the wedge and the length of the insertion rod neck is as follows: When the plug engagement flange has one, the length of the wedge is greater than the distance between the root of the first transition surface and the plug engagement flange; When there are multiple plug-in flanges, the length of the wedge is greater than the distance between the root of the first transition surface and the outermost plug-in flange.
[0008] Furthermore, the inner conical surface of the wedge is provided with a radially protruding protrusion at the end away from the plug engagement flange, and the protrusion is provided with an abutment surface for abutting against the neck of the plug rod.
[0009] Furthermore, the outer diameter of the plug connecting section is consistent with the inner cavity size of the fixed positioning sleeve, so that a guide structure is formed between the plug connecting section and the inner cavity of the fixed positioning sleeve.
[0010] Furthermore, the outer diameter of the plug connecting section near the neck of the plug rod is the same as the outer diameter of the plug; the axial length of the neck of the plug rod is less than the axial length of the fixing and positioning sleeve.
[0011] Furthermore, the inner cavity of the fixed positioning sleeve is a polygonal cavity at one end near the conical positioning surface; And / or, the inner cavity of the fixing and positioning sleeve is provided with a fixing and positioning sleeve guide surface near the plug insertion end.
[0012] Furthermore, a rod clamping part is also provided between the rod socket and the plug connection section; And / or, the included angle of the plug engagement flange is an obtuse angle.
[0013] Furthermore, the end of the wedge that faces the plug into which it is inserted is provided with a wedge guide surface; And / or, the plug is provided with a plug guide surface.
[0014] A precast concrete component includes a precast concrete component body and end plates disposed at both ends of the precast concrete component body, and also includes the end plate anchoring wedge mechanical joint described in this application. The insertion rod is installed on the end plate at one end; the fixed positioning sleeve is installed on the end plate at the other end. The precast concrete component body is also provided with an elastic element receiving cavity near the end where the fixed positioning sleeve is provided. The elastic element receiving cavity is positioned corresponding to the fixed positioning sleeve. The elastic element and the wedge are provided in the elastic element receiving cavity. One end of the elastic element abuts against the bottom of the elastic element receiving cavity, and the other end abuts against the end face of the wedge, so that the outer conical surface of the wedge abuts against the conical positioning surface of the fixed positioning sleeve. Adjacent precast concrete components can be connected via the end plate anchoring wedge mechanical joint.
[0015] Compared with the prior art, the end plate anchoring wedge mechanical joint and precast concrete component disclosed in this utility model have the following beneficial effects: 1. In this application, because the plug has a plug-fitting flange, the wedge and the fixed positioning sleeve have conical surface contact. The wedge has an inner conical surface, and the plug-fitting flange makes line contact with the inner conical surface of the wedge. This allows the plug to form a line contact (line snap-fit) on the inner conical surface of the wedge after the plug rod, wedge, and fixed positioning sleeve are engaged. Furthermore, the plug-fitting flange, wedge, and conical positioning surface of the fixed positioning sleeve form a "three-cone integrated" snap-fit structure. Because the plug-fitting flange makes line contact with the inner conical surface of the wedge, and the inner conical surface of the wedge is long... The distance between the plug and the fixed positioning sleeve is adjusted to accommodate the changes in distance caused by the deviation of the precast pile end face. Specifically, the axial length of the inner conical surface of the wedge clip forms the axial tolerance distance for the plug and the wedge clip to engage. This results in a large axial tolerance distance between the plug and the wedge clip. Consequently, when the plug rod engages with the fixed positioning sleeve and the wedge clip, the plug engagement flange of the plug rod can effectively engage with the inner conical surface of the wedge clip, preventing over-insertion or under-insertion between the plug and the wedge clip. This ensures the connection performance between precast concrete components.
[0016] Simultaneously, under the thrust of the elastic element, the wedge can completely engage within the space between the plug and the conical positioning surface of the fixed positioning sleeve, thus achieving a truly gapless zero-point positioning connection between the plug, wedge, and fixed positioning sleeve. Therefore, when using the end-plate anchoring wedge-type mechanical joint disclosed in this utility model for connecting precast concrete components, the connection of the precast concrete components will not crack or develop fissures under tensile, shear, or bending forces. In other words, using the end-plate anchoring wedge-type mechanical joint disclosed in this utility model for connecting precast concrete components ensures that the pile connection exhibits high tensile, bending, and shear resistance. Furthermore, it eliminates the problem of gaps generated during the connection of precast concrete components due to the existing mechanical joint connection mechanism, which causes cracks at the joint of the precast concrete components and poses safety hazards to the building pile foundation. Furthermore, line contact allows the mechanical joint to concentrate the force on a tiny area when subjected to tension, generating extremely high local pressure. This high pressure causes the material in the contact area to undergo minute elastic or plastic deformation, which microscopically promotes the interlocking of surface rough peaks, forming a "mechanical interlocking" effect. This interlocking significantly increases the sliding resistance, preventing the joint from slipping under force and avoiding connection failure caused by the wedge being squeezed out.
[0017] 2. The end plate anchoring wedge-type mechanical joint disclosed in this application has a large axial tolerance distance between the plug and the wedge because the axial length of the inner conical surface of the wedge forms the axial tolerance distance for the plug and the wedge to engage. Therefore, when the plug rod engages with the fixed positioning sleeve and the wedge, the plug engagement flange of the plug rod can effectively engage with the inner conical surface of the wedge. Thus, multiple mechanical joints on the end face of the precast concrete component can be stressed simultaneously. This eliminates the problem in existing precast concrete component end face mechanical joints where one or two mechanical joints are stressed first, while other mechanical joints are not stressed. This would cause the mechanical joints that are stressed first to be damaged first. After the mechanical joints that are stressed first are damaged, the other mechanical joints are stressed in sequence (i.e., only one or two mechanical joints are stressed at the same time during the entire pull-out process) and may be damaged in sequence.
[0018] 3. The end plate anchoring wedge mechanical joint disclosed in this application, because the insertion rod seat is threadedly connected to the end plate, can adjust the length of the insertion rod at the end of the precast concrete component by adjusting the length of the connection between the insertion rod seat and the end plate. This allows the end plate anchoring wedge mechanical joint to be used for connecting different types of precast concrete components (the end plate thickness of different types of precast concrete components will be different). In other words, the end plate anchoring wedge mechanical joint disclosed in this application can realize the connection of different types of precast concrete components using one specification of end plate anchoring wedge mechanical joint.
[0019] 4. The end plate anchoring wedge-type mechanical joint disclosed in this application has a guide structure inside the fixed positioning sleeve, which can fully guide the insertion rod even if the insertion rod is not fully inserted, with a larger fault tolerance space, preventing the insertion rod from being inserted eccentrically relative to the fixed positioning sleeve, so that the wedge is kept in the same axial position as much as possible during the insertion process, ensuring the success rate of insertion, and thus improving the bending and shear resistance of the connected pile.
[0020] 5. When using the end plate anchoring wedge mechanical joint disclosed in this application to connect precast concrete components, the end plate welding and mechanical joint anchoring connection between two adjacent precast concrete components can work together to further improve the pull-out resistance, bending resistance and shear resistance of the precast concrete components. Attached Figure Description
[0021] Figure 1 This is a structural diagram of the first embodiment of the end plate anchoring wedge-type mechanical joint disclosed in this utility model; Figure 2 for Figure 1 A sectional view; Figure 3 This is a structural diagram of the insertion rod in the end plate anchoring wedge-type mechanical joint disclosed in this utility model; Figure 4 This is a front view of the fixing and positioning sleeve in the end plate anchoring wedge-type mechanical joint disclosed in this utility model. Figure 5 This is a cross-sectional view of the fixing and positioning sleeve in the end plate anchoring wedge-type mechanical joint disclosed in this utility model. Figure 6 for Figure 4 A bottom view; Figure 7 for Figure 4 Top view; Figure 8 This is a front view of the elastic element in the end plate anchoring wedge-type mechanical joint disclosed in this utility model. Figure 9 for Figure 8 The left view; Figure 10 This is a top view of the wedge clip in the end plate anchoring wedge clip mechanical joint disclosed in this utility model. The number of wedge blocks in the figure is 4. Figure 11 This is a front view of the wedge clip in the end plate anchoring wedge clip mechanical joint disclosed in this utility model; Figure 12 This is a structural diagram of a second embodiment of the end plate anchoring wedge-type mechanical joint disclosed in this utility model. In this embodiment, the plug snap-fit flange has multiple strips. Figure 13 This is a structural diagram of the insertion rod in the second embodiment of the end plate anchoring wedge-type mechanical joint disclosed in this utility model; Figure 14 This is a structural diagram of a precast concrete component connection using the end plate anchoring wedge mechanical joint disclosed in this utility model. In the figure: 1. Plug; 10. Plug base; 11. Plug; 110. Plug snap-fit flange; 12. Plug connection section; 13. Plug neck; 14. First transition surface; 15. Plug clamping part; 16. Plug guide surface; 17. Plug snap-fit part; 18. Plug end face; 2. Wedge; 20. Outer surface; 21. Inner conical surface; 22. Outer conical surface; 23. Wedge end face; 24. Wedge guide surface; 25. Protrusion; 26. Abutment surface; 27. Wedge end; 3. Elastic components; 4. Fixed positioning sleeve; 40. Plug insertion end; 41. Wedge snap-fit end; 42. Conical positioning surface; 43. First end plate connecting part; 44. Fixed positioning sleeve guide surface; 5. End plate; 6. Precast concrete component body; 60. Elastic element receiving cavity; 61. Main reinforcement. Detailed Implementation
[0022] Example 1 like Figure 1 and Figure 2 As shown, the end plate anchoring wedge-type mechanical joint disclosed in this utility model is used for the mechanical connection of precast concrete components with end plates 5, including: a plug rod 1, a wedge 2, an elastic element 3, and a fixing and positioning sleeve 4. The insertion rod 1 includes an insertion rod seat 10, a plug 11, and a plug connecting section 12. The insertion rod seat 10 is provided with an external thread for threaded connection with the end plate 5. An insertion rod neck 13 is provided between the plug connecting section 12 and the plug 11. The outer diameter of the insertion rod neck 13 is smaller than the outer diameter of the plug connecting section 12. The plug 11 is provided with a plug snap-fit flange 110. The wedge 2 is provided with an outer surface 20, an inner conical surface 21, an outer conical surface 22, and a wedge end face 23; One end of the fixed positioning sleeve 4 is a plug insertion end 40, and the other end is a wedge snap-fit end 41. The inner cavity of the wedge snap-fit end 41 is provided with a tapered positioning surface 42. The outer wall of the fixed positioning sleeve 4 is provided with a first end plate connecting part 43 for threaded connection with the end plate 5. The fixed positioning sleeve 4 has two or more wedges 2 at one end of the tapered positioning surface 42 and an elastic member 3 that abuts against the end face 23 of the wedge and can apply elastic force to the wedge 2; The plug 11 can be inserted into the space formed by two or more wedges 2 through the plug insertion end 40. Under the elastic force of the elastic member 3, the wedges 2 enter the space between the conical positioning surface 42 and the neck of the insertion rod 13, so that the outer conical surface 22 of the wedge 2 abuts against the conical positioning surface 42 of the fixed positioning sleeve 4, and the plug engagement flange 110 of the plug 11 forms a line contact with the inner conical surface 21 of the wedge 2.
[0023] Specifically, such as Figure 3 As shown, the plug 1 includes a plug seat 10, a plug 11, and a plug connecting section 12. The plug seat 10 is provided with an external thread. One end of the plug seat 10 is provided with a plug connecting section 12, and the other end of the plug connecting section 12 is provided with a plug 11. A plug neck 13 is provided between the plug connecting section 12 and the plug 11. The outer diameter of the plug neck 13 is smaller than the outer diameter of the plug connecting section 12. The end of the plug 11 is provided with a plug guide surface 16 for easy guidance. The side of the plug 11 facing the plug connecting section 12 is a plug snap-fit part 17. The plug snap-fit part 17 radially shrinks from one end of the plug 11 towards the plug neck 13. The flange between the plug snap-fit part 17 and the outer wall surface of the plug 11 forms a plug snap-fit flange 110.
[0024] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the fixed positioning sleeve 4 is a circular sleeve structure. One end is a plug insertion end 40 for inserting the plug 11, and the other end is a wedge snap-fit end 41 for abutting against the wedge snap 2. The inner cavity of the wedge snap-fit end 41 is provided with a tapered positioning surface 42. The outer wall of the fixed positioning sleeve 4 is provided with external threads to form a first end plate connecting part 43 for threaded connection with the end plate 5. like Figure 10 and Figure 11 As shown, the wedge 2 has an outer surface 20, an inner conical surface 21, an outer conical surface 22, and a wedge end face 23; the taper of the outer conical surface 22 of the wedge 2 is greater than the taper of the inner conical surface 21, so that the wedge 2 forms a wedge-shaped structure that is thin at one end and thick at the other end, and the thinner end is the wedge end 27; like Figure 14 As shown, in use, the end plate anchoring wedge-type mechanical joint disclosed in this utility model has a fixed positioning sleeve 4 threadedly connected to the end plate 5. One end of the fixed positioning sleeve 4, which has a tapered positioning surface 42, has two or more wedges 2 and an elastic element 3 that abuts against the wedge end face 23 and can apply elastic force to the wedges 2. The elastic element 3 can be a tower spring, a rectangular spring, or other forms of elastic structure, preferably using a... Figure 8 and Figure 9The rectangular spring shown; the plug 11 can be inserted into the space surrounded by two or more wedges 2 through the plug insertion end 40 of the fixed positioning sleeve 4. Under the elastic force of the elastic member 3, the wedge 2 enters the space between the conical positioning surface 42 and the insertion rod neck 13, so that the outer conical surface 22 of the wedge 2 abuts against the conical positioning surface 42 of the fixed positioning sleeve 4, the wedge insertion end 27 of the wedge 2 abuts against the first transition surface 14 between the insertion rod neck 13 and the plug connection section 12, and the plug engagement flange 110 on the plug 11 forms a line contact with the inner conical surface 21 of the wedge 2. The end-plate anchoring wedge-type mechanical connector disclosed in this application has a plug-clamping flange 110 on the plug 11, and the wedge 2 and the fixed positioning sleeve 4 have a conical contact. The wedge 2 has an inner conical surface 21 on its inner side, and the plug-clamping flange 110 makes line contact with the inner conical surface 21 of the wedge 2. After the plug rod 1, wedge 2 and fixed positioning sleeve 4 are engaged, the plug 11 forms a line contact (line clamping) on the inner conical surface 21 of the wedge 2. The plug-clamping flange 110 of the plug 11, the wedge 2 and the conical positioning surface 42 of the fixed positioning sleeve 4 form a "three-cone integrated" clamping structure. Because the plug-clamping flange 110 and the inner conical surface 21 of the wedge 2 are in line contact, the plug 11 forms a line contact (line clamping) on the inner conical surface 21 of the wedge 2. The contact is such that the length of the inner conical surface 21 of the wedge 2 satisfies the distance change between the plug and the fixed positioning sleeve caused by the deviation of the precast pile end face. When the plug 11 is inserted into the space enclosed by the wedge 2, the plug engagement flange 110 of the plug 11 forms line contact with the inner conical surface 21 of the wedge 2. That is, in this application, the plug 11 and the wedge 2 have a large axial tolerance distance. Therefore, when the insert rod 1 engages with the fixed positioning sleeve 4 and the wedge 2, the plug 11 of the insert rod 1 can be effectively engaged with the wedge 2. There will be no problem of over-insertion or under-insertion between the plug 11 and the wedge 2, thus ensuring the connection performance between precast concrete components. Furthermore, the end plate anchoring wedge-type mechanical joint disclosed in this application has a large axial tolerance distance between the plug and the wedge because the axial length of the inner conical surface of the wedge forms the axial tolerance distance for the plug and the wedge to engage. Therefore, when the plug engages with the fixed positioning sleeve and the wedge, the plug engagement flange of the plug can effectively engage with the inner conical surface of the wedge. Thus, multiple mechanical joints on the end face of the precast concrete component can be stressed simultaneously. This eliminates the problem in existing precast concrete component end face mechanical joints where one or two mechanical joints are stressed first, while other mechanical joints are not stressed. This would cause the mechanical joints that are stressed first to be damaged first. After the mechanical joints that are stressed first are damaged, the other mechanical joints are stressed in sequence (i.e., only one or two mechanical joints are stressed at the same time during the entire pull-out process) and may be damaged in sequence.
[0025] Simultaneously, under the thrust of the elastic element 3, the wedge 2 can be completely engaged in the space between the plug 11 and the conical positioning surface 42 of the fixed positioning sleeve 4, thereby achieving a truly gapless zero-point positioning connection between the plug 11, the wedge 2, and the fixed positioning sleeve 4. Therefore, when using the end-plate anchoring wedge mechanical joint disclosed in this utility model for connecting precast concrete components, the connection of the precast concrete components will not crack or generate fissures when subjected to tensile, shear, or bending forces. In other words, using the end-plate anchoring wedge mechanical joint disclosed in this utility model for connecting precast concrete components can ensure that the pile connection has high tensile, bending, and shear resistance. It also eliminates the problem of gaps generated in the connection mechanism of existing mechanical joints, which can cause cracks at the joint of precast concrete components, leading to safety hazards in the building pile foundation. Furthermore, line contact allows the mechanical joint to concentrate the force on a tiny area when subjected to tension, generating extremely high local pressure. This high pressure causes the material in the contact area to undergo minute elastic or plastic deformation, which microscopically promotes the interlocking of surface rough peaks, forming a "mechanical interlocking" effect. This interlocking significantly increases the sliding resistance, preventing the joint from slipping under force and avoiding connection failure caused by the wedge being squeezed out.
[0026] Furthermore, a first transition surface 14 is provided between the plug connection section 12 and the plug neck 13; The relationship between the length of the wedge 2 and the length of the insertion rod neck 13 is as follows: When the plug engagement flange 110 has one, the length of the wedge 2 is greater than the distance between the root of the first transition surface 14 and the plug engagement flange 110.
[0027] Specifically, in this embodiment, since the length of the wedge 2 is greater than the distance between the root of the first transition surface 14 between the neck of the plug rod 13 and the plug connection section 12 and the plug engagement flange 110, that is, when the wedge end 27 of the wedge 2 abuts against the first transition surface 14, one end of the wedge end face 23 of the wedge 2 is located on the side of the plug engagement flange 110 near the end of the plug 11, it can be ensured that the plug engagement flange 110 of the plug 11 and the inner conical surface 21 of the wedge 2 form a line contact regardless of the state of the plug rod 1 and the wedge 2 (wedge end 27 of the wedge 2 abuts against the first transition surface 14 or wedge end 27 of the wedge 2 does not abut against the first transition surface 14).
[0028] Furthermore, the inner conical surface 21 of the wedge 2 is provided with a radially protruding protrusion 25 at the end away from the plug engagement flange 110, and the protrusion 25 is provided with an abutment surface 26 for abutting against the neck of the plug rod 13.
[0029] Specifically, such as Figure 11The inner conical surface 21 of the wedge 2, away from the plug engagement flange 110, is provided with a radially protruding protrusion 25. That is, the inner conical surface 21 of the wedge 2 is provided with a protrusion 25 on the side near the wedge insertion end 27. An abutment surface 26 is formed on the protrusion 25 for abutting against the outer wall of the insertion rod neck 13. Due to the protrusion 25 and the abutment surface 26 formed on the protrusion 25, the wedge 2 can effectively contact the insertion rod neck 13, and the contact area between the two is increased, avoiding stress concentration that could damage the wedge 2.
[0030] Furthermore, the outer diameter of the plug connecting section 12 is consistent with the inner cavity size of the fixed positioning sleeve 4, so that a guide structure is formed between the plug connecting section 12 and the inner cavity of the fixed positioning sleeve 4.
[0031] Specifically, such as Figure 2 As shown, the outer diameter of the plug connecting section 12 is consistent with the inner cavity size of the fixed positioning sleeve 4. This means that during the insertion of the plug 11 into the wedge 2, a guide structure is formed between the inner cavity of the fixed positioning sleeve 4 and the plug connecting section 12, which can ensure that the plug 11 is effectively inserted into the wedge 2. At the same time, the inner cavity of the fixed positioning sleeve 4 plays a corrective role for the plug connecting section 12, thereby preventing the plug rod from radially shifting or swaying, which would reduce the connection performance of the mechanical connector.
[0032] Furthermore, the outer diameter of the end of the plug connecting section 12 near the neck of the plug rod 13 is the same as the outer diameter of the plug 11; the axial length of the neck of the plug rod 13 is less than the axial length of the fixing and positioning sleeve 4.
[0033] Specifically, the inner wall of the fixed positioning sleeve 4 cooperates with the plug connection section 12 to form a guide structure. The outer diameter of the plug connection section 12 near the neck of the plug rod is the same as the outer diameter of the plug 11. The axial length of the neck of the plug rod 13 is less than the axial length of the fixed positioning sleeve 4. During the insertion process, the edge of the plug 11 first enters the inner cavity of the fixing and positioning sleeve 4. The inner cavity of the fixing and positioning sleeve 4 guides the insertion rod 1 through the edge of the plug 11. Before the edge of the plug 11 leaves the inner cavity of the fixing and positioning sleeve 4, the plug connecting section 12 enters the inner cavity of the fixing and positioning sleeve 4. The inner cavity of the fixing and positioning sleeve 4 guides the insertion rod 1 through the edge of the plug 11 and the plug connecting section 12 to prevent the insertion rod 1 from radially shifting or swaying. Subsequently, the edge of the plug 11 passes through the inner cavity of the fixing and positioning sleeve 4. The inner cavity of the fixing and positioning sleeve 4 continues to guide the insertion rod 1 through the plug connecting section 12, ensuring that the insertion rod 1 is guided by the inner cavity of the fixing and positioning sleeve 4 throughout the insertion process. Under the premise of high coaxiality with the fixing and positioning sleeve 4, the wedge 2 is opened, avoiding the insertion failure caused by the insertion rod 1 being unable to rebound due to radial shift or swaying.
[0034] Furthermore, the inner cavity of the fixed positioning sleeve 4 is a polygonal cavity at one end near the conical positioning surface 42.
[0035] Specifically, the inner cavity of the fixed positioning sleeve 4 is a polygonal cavity at the end near the conical positioning surface 42, which makes it easy to assemble with tools such as polygonal screwdrivers.
[0036] Furthermore, the inner cavity of the fixed positioning sleeve 4 is provided with a fixed positioning sleeve guide surface 44 near the plug insertion end 40.
[0037] Specifically, such as Figure 5 As shown, the fixed positioning sleeve 4 has a tapered fixed positioning sleeve guide surface 44 at one end facing the plug insertion end 40. The fixed positioning sleeve guide surface 44 can limit the insertion rod 1 within a certain radial range during the insertion process, preventing the insertion rod from radially deviating. Preferably, the inner cavity of the fixed positioning sleeve 4 is a polygonal cavity near the tapered positioning surface 42, forming a fluid discharge channel. Since structural adhesive is applied to the pile end face and injected into the elastic element receiving cavity 60 in the fixed positioning sleeve 4 and the precast concrete component body 6 during the pile connection process, the fluid discharge channel can be used to discharge gas and structural adhesive and other fluids inside the elastic element receiving cavity 60 during the insertion process. The setting of the fluid discharge channel allows the structural adhesive to be evenly discharged at multiple positions in the circumference, avoiding the structural adhesive in the elastic element receiving cavity 60 from being rapidly squeezed and the pressure from suddenly increasing during rapid insertion, which could cause uneven local force and obstruct the wedge 2, preventing it from being properly positioned and leading to insertion failure. In this embodiment, the tapered fixed positioning sleeve guide surface 44 cooperates with the inner cavity of the fixed positioning sleeve 4 to form an internal space similar to a funnel shape, which provides a larger tolerance space for the insertion of the insertion rod 1, while ensuring a higher coaxiality between the insertion rod 1 and the fixed positioning sleeve 4 when the insertion is not fully complete.
[0038] Furthermore, a plug clamping part 15 is provided between the plug holder 10 and the plug connection section 12.
[0039] Specifically, such as Figure 3 As shown, the plug seat 10 and plug connection section 12 of the plug rod 1 are also provided with a plug rod clamping part 15. The clamping structure can generally be arranged in a clamping plane with opposite sides. Preferably, the clamping structure is a polygonal column structure, so as to facilitate clamping with tools such as wrenches to connect the plug rod to other components by threads. Preferably, the diameter of the outer circle of the plug rod clamping part 15 is smaller than the inner diameter of the large diameter end of the guide surface 44 of the fixed positioning sleeve 4 at the plug insertion end 40 of the fixed positioning sleeve 4. That is, the inner diameter of the fixed positioning sleeve 4 on the side near the plug insertion end 40 is larger than the outer circle diameter of the plug rod clamping part 15. This allows the end of the fixed positioning sleeve 4 to accommodate the plug rod clamping part 15 when the plug rod 1 is engaged with the fixed positioning sleeve 4 and the wedge 2, providing a larger tolerance space for the insertion of the plug rod 1.
[0040] Furthermore, the included angle of the plug engagement flange 110 is an obtuse angle.
[0041] Specifically, such as Figure 3 As shown, the included angle of the plug engagement flange 110 is an obtuse angle, preferably 120 degrees. Setting these included angles to obtuse angles ensures that all wire contacts are obtuse angle contacts. Under high pressure, the deformation is smaller, and a stable wire contact engagement structure can be achieved with minimal deformation. This creates a mechanical interlock between the plug rod 1, the wedge 2, and the fixing and positioning sleeve 4, while also preventing further deformation under tensile force and enhancing the stability of the connection.
[0042] Furthermore, the end of the wedge 2 that faces the plug 11 into which it is inserted is provided with a wedge guide surface 24; Specifically, such as Figure 11 As shown, the end of the wedge 2 facing the plug 11 is provided with a wedge guide surface 24 so that the plug can be inserted into the space enclosed by multiple wedges 2.
[0043] Furthermore, the plug 11 is provided with a plug guide surface 16 to facilitate the insertion of the plug 11 into the fixing positioning sleeve 4 and the wedge 2.
[0044] Example 2 like Figure 12 and Figure 13The diagram shown is a structural diagram of a second embodiment of the end plate anchoring wedge mechanical joint disclosed in this application. The difference between this embodiment and embodiment 1 is that, in embodiment 1, the insertion rod 1 includes an insertion rod seat 10, a plug 11, and a plug connecting section 12. The side of the plug 11 facing the plug connecting section 12 is a plug snap-fit part 17. The plug snap-fit part 17 is radially recessed from one end of the plug 11 to one end of the plug connecting section 12. The flange between the plug snap-fit part 17 and the outer wall surface of the plug 11 forms a plug snap-fit flange 110. In this embodiment, in addition to the flange between the plug engagement portion 17 and the outer wall of the plug 11 forming a plug engagement flange 110, the plug engagement portion 17 is also provided with one or more rings of outwardly protruding tooth-shaped protrusions. The flange between the plug engagement portion 17 and the outer wall of the plug 11 and the tooth-shaped protrusions on the plug engagement portion form multiple (in this application, multiple includes two or more) plug engagement flanges 110. The number of plug engagement flanges 110 in the figure is 2. In this embodiment, since the plug clamp flange 110 has multiple (i.e., two or more), the contact area between the plug 11 and the inner conical surface 21 of the wedge 2 is increased, further forming a multi-ring linear contact area. As a result, when the plug rod 1 is subjected to a pulling force, the multiple lines of contact work together to generate extremely high local pressure. The high pressure causes the material in the contact area to undergo slight elastic or plastic deformation, which microscopically causes the surface rough peaks to interlock with each other, forming a "mechanical interlocking" effect. This interlocking significantly increases the sliding resistance, so that the connector will not slip when subjected to force, avoiding connection failure caused by the wedge being squeezed out.
[0045] In this embodiment, a first transition surface 14 is provided between the plug connection section 12 and the plug neck 13; The relationship between the length of the wedge 2 and the length of the insertion rod neck 13 is as follows: The length of the wedge 2 is greater than the distance between the root of the first transition surface 14 and the outermost plug engagement flange 110.
[0046] Specifically, in this embodiment, since the length of the wedge 2 is greater than the distance between the root of the first transition surface 14 between the plug neck 13 and the plug connection section 12 and the outermost plug engagement flange 110, that is, when the wedge end 27 of the wedge 2 abuts against the first transition surface 14, one end of the wedge end face 23 of the wedge 2 is located on the side of the outermost plug engagement flange 110 near the end of the plug 11. This ensures that regardless of the state of the plug 1 and the wedge 2 (wedge end 27 of the wedge 2 abuts against the first transition surface 14 or wedge end 27 of the wedge 2 does not abut against the first transition surface 14), the plug engagement flange 110 of the plug 11 and the inner conical surface 21 of the wedge 2 can form a line contact. In this embodiment, the outermost plug engagement flange 110 refers to the plug engagement flange 110 closest to the end face 18 of the plug.
[0047] Example 3 A precast concrete component is connected using the end plate anchoring wedge mechanical joint disclosed in this application.
[0048] like Figure 14 As shown, the end-plate anchoring wedge-type mechanical joint disclosed in this application is used for connecting precast concrete components. The precast concrete component includes a precast concrete component body 6 and end plates 5 disposed at both ends of the precast concrete component body 6. Main reinforcement bars 61 are also provided inside the precast concrete component body 6, with both ends of the main reinforcement bars 61 fixedly connected to the end plates 5 at both ends. The end plates 5 are also provided with threaded holes for threaded connection with the insert rod seat 10 or the fixed positioning sleeve 4. The insert rod 1 and the fixed positioning sleeve 4 are respectively installed on the end plates 5 at both ends. The end of the fixed positioning sleeve 4 is also provided with an elastic element receiving cavity 60. The elastic element receiving cavity 60 corresponds to the position of the fixed positioning sleeve 4 on the end plate 5. The elastic element receiving cavity 60 is provided with an elastic element 3 and a wedge 2. One end of the elastic element 3 abuts against the bottom of the elastic element receiving cavity 60, and the other end abuts against the end face 23 of the wedge 2, so that the outer conical surface 22 of the wedge 2 abuts against the conical positioning surface 42 of the fixed positioning sleeve 4. Two adjacent precast concrete components can be connected by the plug 11 of the end plate anchoring wedge mechanical joint and the wedge 2.
[0049] When using the end-plate anchored wedge-type mechanical joint disclosed in this utility model for connecting precast concrete components, the connection of the precast concrete components will not crack or develop fissures under tensile, shear, or bending forces. This means that the pile connection exhibits high tensile, bending, and shear resistance. Furthermore, it eliminates the problem of gaps generated in existing mechanical joint connections, which can lead to cracks at the precast concrete component joints and pose safety hazards to the building pile foundation. Moreover, the line contact allows the mechanical joint to concentrate force on a small area under tension, generating extremely high local pressure. This high pressure causes minute elastic or plastic deformation of the contact area material, microscopically promoting the interlocking of surface rough peaks and forming a "mechanical interlocking" effect. This interlocking significantly increases sliding resistance, preventing slippage of the joint under stress and avoiding connection failure caused by the wedge being squeezed out.
[0050] Meanwhile, the end plate anchoring wedge mechanical joint disclosed in this application, since the insertion rod seat 10 of the insertion rod 1 is threadedly connected to the end plate 5, can adjust the length of the insertion rod 1 outside the end of the precast concrete component by adjusting the length of the connection between the insertion rod seat 10 and the end plate 5. This allows the end plate anchoring wedge mechanical joint to be used for connecting different types of precast concrete components (the end plate thickness of different types of precast concrete components will be different). In other words, the end plate anchoring wedge mechanical joint disclosed in this application can realize the connection of different types of precast concrete components using an end plate anchoring wedge mechanical joint of one specification.
[0051] When connecting precast concrete components disclosed in this application, anchoring can be achieved solely using end-plate anchoring wedge-type mechanical joints. Preferably, adjacent precast concrete components are anchored together via the end-plate anchoring wedge-type mechanical joints and end-plate welding; that is, the ends of the precast concrete components are anchored together using end-plate anchoring wedge-type mechanical joints, and the outer edges of the end plates are welded together. By combining end-plate welding and mechanical joint anchoring between adjacent precast concrete components, the pull-out, bending, and shear resistance of the precast concrete components are further improved.
[0052] The formation process of the elastic element receiving cavity 60 on the precast concrete component body 6 in this application is as follows: Before the precast concrete component body 6 is poured, the end plates 5 at both ends are tensioned to the main reinforcement 61 by tensioning bolts. After the tensioning bolts on the end plates 5 used to install the fixing positioning sleeve 4 are connected to the end plates 5, the tensioning bolts can pass through the end plates 5 and extend a certain length on the side of the end plates 5 facing the concrete pouring area. Then the concrete is poured. After the concrete component is made, the tensioning bolts are removed. The part of the tensioning bolts that extends out of the end plates (the part placed in the concrete pouring area) will form a groove at the end of the precast concrete component body 6, that is, form the elastic element receiving cavity 60.
[0053] 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 type of mechanical joint for end-plate anchoring wedge clamps, used for mechanical connection of precast concrete components with end plates, characterized in that, include: Insert rod (1), wedge (2), elastic element (3) and fixing positioning sleeve (4); The plug (1) includes a plug seat (10), a plug (11) and a plug connection section (12). The plug seat (10) is provided with an external thread for threaded connection with the end plate (5). A plug neck (13) is provided between the plug connection section (12) and the plug (11). The outer diameter of the plug neck (13) is smaller than the outer diameter of the plug connection section (12). The plug (11) is provided with a plug snap-fit flange (110). The wedge (2) is provided with an outer side surface (20), an inner conical surface (21), an outer conical surface (22), and a wedge end face (23); One end of the fixed positioning sleeve (4) is a plug insertion end (40), and the other end is a wedge snap-fit end (41). The inner cavity of the wedge snap-fit end (41) is provided with a tapered positioning surface (42). The outer wall of the fixed positioning sleeve (4) is provided with a first end plate connection part (43) for threaded connection with the end plate (5). The fixed positioning sleeve (4) has two or more wedges (2) at one end of the tapered positioning surface (42) and an elastic member (3) that abuts against the end face (23) of the wedge and can apply elastic force to the wedge (2). The plug (11) can be inserted into the space formed by two or more wedges (2) through the plug insertion end (40). The wedges (2) enter the space between the conical positioning surface (42) and the neck of the plug rod (13) under the elastic force of the elastic element (3), so that the outer conical surface (22) of the wedge (2) abuts against the conical positioning surface (42) of the fixed positioning sleeve (4), and the plug engagement flange (110) of the plug (11) forms a line contact with the inner conical surface (21) of the wedge (2).
2. The end plate anchoring wedge-type mechanical joint according to claim 1, characterized in that: The plug snap-fit flange (110) has one or more.
3. The end plate anchoring wedge-type mechanical joint according to claim 2, characterized in that: A first transition surface (14) is provided between the plug connection section (12) and the plug neck (13). The relationship between the length of the wedge (2) and the length of the insertion rod neck (13) is as follows: When the plug snap-fit flange (110) has one, the length of the wedge (2) is greater than the distance between the root of the first transition surface (14) and the plug snap-fit flange (110); When there are multiple plug-in flanges (110), the length of the wedge (2) is greater than the distance between the root of the first transition surface (14) and the outermost plug-in flange (110).
4. The end plate anchoring wedge-type mechanical joint according to any one of claims 1 to 3, characterized in that: The inner conical surface (21) of the wedge (2) is further provided with a radially protruding protrusion (25) at one end away from the plug engagement flange (110), and the protrusion (25) is provided with an abutment surface (26) for abutting against the neck of the plug (13).
5. The end plate anchoring wedge-type mechanical joint according to claim 1, characterized in that: The outer diameter of the plug connecting section (12) is consistent with the inner cavity size of the fixed positioning sleeve (4), so that a guide structure is formed between the plug connecting section (12) and the inner cavity of the fixed positioning sleeve (4).
6. The end plate anchoring wedge-type mechanical joint according to claim 5, characterized in that: The outer diameter of the plug connecting section (12) near the neck of the plug rod (13) is the same as the outer diameter of the plug (11); the axial length of the neck of the plug rod (13) is less than the axial length of the fixing and positioning sleeve (4).
7. The end plate anchoring wedge-type mechanical joint according to claim 6, characterized in that: The inner cavity of the fixed positioning sleeve (4) is a polygonal cavity at the end near the conical positioning surface (42); And / or, the inner cavity of the fixed positioning sleeve (4) is provided with a fixed positioning sleeve guide surface (44) near the plug insertion end (40).
8. The end plate anchoring wedge-type mechanical joint according to claim 1, characterized in that: A plug clamping part (15) is also provided between the plug socket (10) and the plug connection section (12); And / or, the included angle of the plug engagement flange (110) is an obtuse angle.
9. The end plate anchoring wedge-type mechanical joint according to claim 1, characterized in that: The wedge (2) has a wedge guide surface (24) at the end that is inserted toward the plug (11); And / or, the plug (11) is provided with a plug guide surface (16).
10. A precast concrete component, comprising a precast concrete component body (6) and end plates (5) disposed at both ends of the precast concrete component body (6), characterized in that: It also includes the end plate anchoring wedge mechanical joint as described in any one of claims 1 to 9; The insertion rod (1) is installed on the end plate (5) at one end; the fixed positioning sleeve (4) is installed on the end plate (5) at the other end; the precast concrete component body (6) is also provided with an elastic element receiving cavity (60) near the end where the fixed positioning sleeve (4) is provided. The elastic element receiving cavity (60) is positioned opposite to the fixed positioning sleeve (4). The elastic element receiving cavity (60) is provided with the elastic element (3) and the wedge (2). One end of the elastic element (3) abuts against the bottom of the elastic element receiving cavity (60), and the other end abuts against the end face (23) of the wedge, thereby making the outer conical surface (22) of the wedge (2) abut against the conical positioning surface (42) of the fixed positioning sleeve (4); Adjacent precast concrete components can be connected via the end plate anchoring wedge mechanical joint.