Mechanical joint for nut sleeve anchoring and precast pile connecting structure

Abstract

The utility model discloses a mechanical connector for nut sleeve anchoring and a precast pile connecting structure. The mechanical connector comprises a first nut sleeve, a second nut sleeve, a positioning insertion rod and a clamping spring. The first nut sleeve is connected with the main rib and the positioning insertion rod; the positioning insertion rod comprises a positioning insertion rod seat and an insertion head, the insertion head is provided with first clamping teeth, and the first clamping teeth are provided with first clamping surfaces; the second nut sleeve is connected with the main rib, a clamping spring containing groove is formed in the second nut sleeve, and a second clamping face is arranged in the clamping spring containing groove; the clamping spring is arranged in the clamping spring accommodating groove; the plug can be inserted into the second nut sleeve, and clamping connection of the positioning insertion rod and the second nut sleeve is achieved through the first clamping connection face, the second clamping connection face and the clamping connection spring. According to the utility model, rapid connection between concrete piles can be realized, the connection is reliable, and the comprehensive cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of precast pile connection, in particular to a mechanical joint for nut sleeve anchoring and a precast pile connection structure. Background Art

[0002] In construction, the docking of precast components is an essential process. To achieve the rapid connection of precast components, the prior art generally uses mechanical joints for the connection of precast components. However, the existing mechanical joints have problems such as complex structures and high comprehensive costs. Content of the Utility Model

[0003] The utility model proposes a mechanical joint for nut sleeve anchoring in view of the above problems.

[0004] The technical means adopted by the utility model are as follows:

[0005] A mechanical joint for nut sleeve anchoring, comprising: a first nut sleeve, a second nut sleeve, a positioning plug and a clamping spring;

[0006] One end of the first nut sleeve is provided with a first main reinforcement connecting part for connecting with the main reinforcement, and the other end is provided with a positioning plug connecting part for connecting with the positioning plug;

[0007] The positioning plug includes a positioning plug seat and a plug provided on the positioning plug seat. The positioning plug seat is connected with the positioning plug connecting part of the first nut sleeve. The plug is provided with first clamping teeth, and the first clamping teeth are provided with a first clamping surface;

[0008] One end of the second nut sleeve is provided with a second main reinforcement connecting part for connecting with the main reinforcement, and the other end is provided with a clamping spring accommodating groove for accommodating the clamping spring. A second clamping surface is provided in the clamping spring accommodating groove;

[0009] The clamping spring is arranged in the clamping spring accommodating groove; the plug can be inserted into the second nut sleeve. When the plug is inserted into the second nut sleeve, the clamping spring can expand radially in the clamping spring accommodating groove and then clamp in the first clamping teeth, and the positioning plug and the second nut sleeve are clamped through the first clamping surface, the second clamping surface and the clamping spring.

[0010] Further, the first clamping teeth are one or more circles of annular clamping teeth provided on the plug; the clamping spring accommodating groove is one or more circles of annular grooves provided in the second nut sleeve; the clamping spring is an annular clamping spring.

[0011] Further, the first clamping teeth are spiral clamping teeth provided on the plug; the clamping spring accommodating groove is a spiral groove provided in the second nut sleeve; the clamping spring is a spiral clamping spring.

[0012] Further, the cross-section of the snap spring is triangular, circular or polygonal.

[0013] Further, when the cross-section of the snap spring is circular, after the snap spring is clamped in the first tooth, the outer diameter corresponding to the tooth top of the first tooth is greater than or equal to the diameter corresponding to the center of the cross-section of the snap spring;

[0014] When the cross-section of the snap spring is triangular, the ratio of the width of the first tooth to the width of the cross-section of the snap spring is less than or equal to 1 / 2, and the height of the first tooth is the same as the height of the cross-section of the snap spring; the ratio of the height of the first tooth to the groove height of the snap spring receiving groove is equal to 1 / 2.

[0015] Further, the cross-section of the snap spring is an equilateral triangle.

[0016] Further, when the cross-section of the snap spring is an equilateral triangle, the ratio of the width of the spiral tooth to the width of the cross-section of the spiral snap spring is less than or equal to 1 / 2, and the height of the spiral tooth is the same as the height of the cross-section of the spiral snap spring; the ratio of the height of the spiral tooth to the groove height of the spiral groove is equal to 1 / 2.

[0017] Further, the spiral tooth is a double-thread spiral tooth structure, the spiral groove is a single-thread spiral groove, the groove pitch of the spiral groove, the pitch of the spiral tooth and the pitch of the spiral snap spring are the same, the groove height of the spiral groove is 2 times the height of the cross-section of the spiral snap spring, the groove width of the spiral groove is the same as the width of the cross-section of the spiral snap spring, the height of the spiral tooth is the same as the height of the cross-section of the spiral snap spring, and the width of the spiral tooth is 1 / 2 of the width of the cross-section of the spiral snap spring.

[0018] Further, a first serrated thread structure is provided in the second nut sleeve, the groove of the first serrated thread structure is a snap spring receiving groove, and the non-working side of the first serrated thread structure is a second snap surface;

[0019] The plug is provided with a second serrated thread structure, the second serrated thread structure is a double-thread serrated thread, and the working side of the second serrated thread structure is a first snap surface.

[0020] Further, the angle between the non-working side and the working side of the serrated thread is 60°.

[0021] Further, the helix direction of the spiral tooth is opposite to the helix direction of the spiral snap spring clamped on the spiral tooth.

[0022] Further, the outer diameter D1 corresponding to the tooth top of the first tooth is the same as the inner diameter D2 corresponding to the groove top of the snap spring receiving groove.

[0023] Furthermore, the top of the first tooth is subjected to diameter reduction to form a tooth top surface; the top of the clamping spring accommodation groove is subjected to diameter expansion to form a groove top surface; the outer diameter D1 corresponding to the tooth top surface is smaller than the inner diameter D2 corresponding to the groove top surface.

[0024] Furthermore, the pitch of the spiral teeth is 2.5 mm - 3 mm.

[0025] Furthermore, the inner diameter of the clamping spring is equal to or less than the diameter corresponding to the root of the first tooth.

[0026] Furthermore, a plug guiding portion is provided at the end of the plug.

[0027] Furthermore, a relief groove is provided at one end of the second nut sleeve away from the insertion of the plug.

[0028] Furthermore, a positioning rod tightening structure is provided at the end of the plug.

[0029] A precast pile connection structure includes: a precast pile body and a mechanical joint;

[0030] The two ends of the main reinforcement in the precast pile body are respectively connected to the first nut sleeve and the second nut sleeve;

[0031] The first nut sleeve is connected to the positioning rod, and a clamping spring is provided in the second nut sleeve; two adjacent precast piles are fixedly connected through the first nut sleeve, the second nut sleeve, the positioning rod and the clamping spring.

[0032] Compared with the prior art, the mechanical joint for nut sleeve anchoring disclosed by the present utility model has the following beneficial effects: the mechanical joint for nut sleeve anchoring disclosed by the present utility model can achieve rapid connection between concrete piles, with reliable connection and low comprehensive cost. Description of the Drawings

[0033] Figure 1 It is a structural diagram of the mechanical joint for nut sleeve anchoring disclosed by the present utility model;

[0034] Figure 2 It is a structural diagram of the positioning rod in the present utility model;

[0035] Figure 3 It is a cross-sectional view of the positioning rod in the present utility model;

[0036] Figure 4 It is a structural diagram of the second nut sleeve in the present utility model;

[0037] Figure 5 It is a structural diagram of the spiral clamping spring in the present utility model;

[0038] Figure 6 It is a cross-sectional view of the spiral clamping spring in the present utility model;

[0039] Figure 7 The figure shows the structural diagram of the pile connection structure using the mechanical joint disclosed in the present utility model.

[0040] In the figure: 1. First nut sleeve; 10. First main reinforcement connecting part; 11. Positioning plug rod connecting part; 2. Second nut sleeve; 20. Second main reinforcement connecting part; 21. Clamping spring accommodating groove; 22. Second clamping surface; 23. Groove top surface; 24. Relief groove; 3. Positioning plug rod; 30. Positioning plug rod seat; 31. Plug; 32. First tooth; 33. First clamping surface; 34. Tooth top surface; 35. Plug guiding part; 36. Positioning plug rod tightening structure; 4. Clamping spring; 50. Prefabricated pile body; 51. Main reinforcement. Detailed implementation mode

[0041] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown, the mechanical joint for nut sleeve anchoring disclosed in the present utility model includes: a first nut sleeve 1, a second nut sleeve 2, a positioning plug rod 3 and a clamping spring 4;

[0042] One end of the first nut sleeve 1 is provided with a first main reinforcement connecting part 10 for connecting with the main reinforcement 51, and the other end is provided with a positioning plug rod connecting part 11 for connecting with the positioning plug rod 3;

[0043] The positioning plug rod 3 includes a positioning plug rod seat 30 and a plug 31 arranged on the positioning plug rod seat 30. The positioning plug rod seat 30 is connected with the positioning plug rod connecting part 11 of the first nut sleeve 1. The plug 31 is provided with a first tooth 32, and the first tooth 32 is provided with a first clamping surface 33;

[0044] One end of the second nut sleeve 2 is provided with a second main reinforcement connecting part 20 for connecting with the main reinforcement 51, and the other end is provided with a clamping spring accommodating groove 21 for accommodating the clamping spring 4. A second clamping surface 22 is arranged in the clamping spring accommodating groove 21;

[0045] The clamping spring 4 is arranged in the clamping spring accommodating groove 21; the plug 31 can be inserted into the second nut sleeve 2. When the plug 31 is inserted into the second nut sleeve 2, the clamping spring 4 can be opened radially in the clamping spring accommodating groove 21 and then clamped in the first tooth 32, and the clamping of the positioning plug rod 3 and the second nut sleeve 2 is realized through the first clamping surface 33, the second clamping surface 22 and the clamping spring 4.

[0046] Specifically, in this embodiment, the positioning plug 3 includes a cylindrical positioning plug base 30. The positioning plug base 30 is provided with an external thread for threaded connection with the positioning plug connection part 11 of the first nut sleeve 1. A cylindrical plug 31 is provided on the positioning plug base 30. The plug 31 is machined with first teeth 32, and a first clamping surface 33 is provided on the first teeth 32. A clamping spring receiving groove 21 is machined on the inner wall of the second nut sleeve 2, and a second clamping surface 22 is provided in the clamping spring receiving groove 21. The clamping spring 4 is arranged in the clamping spring receiving groove 21. When the plug 31 is inserted into the second nut sleeve 2, the plug 31 can expand the clamping spring 4 radially in the clamping spring receiving groove 21, so that the clamping spring 4 clamps on the first teeth 32, and the clamping of the positioning plug 3 and the second nut sleeve 2 is realized through the first clamping surface 33, the second clamping surface 22 and the clamping spring 4.

[0047] The mechanical joint for nut sleeve anchoring disclosed in this application can achieve the rapid connection between concrete piles with only four components, namely the first nut sleeve 1, the second nut sleeve 2, the positioning plug 3 and the clamping spring 4. The connection is reliable and the comprehensive cost is low. At the same time, due to the adoption of the clamping spring 4, the first teeth 32 and the clamping spring receiving groove 21 structure, the plug 31 and the second nut sleeve 2 are more uniformly stressed in the axial length direction, thereby improving the service life of the positioning plug 3 and the second nut sleeve 2 and enhancing the anti-pulling performance of the pile connection.

[0048] Further, the first teeth 32 are one or more circles of annular teeth provided on the plug 31; the clamping spring receiving groove 21 is one or more circles of annular grooves provided in the second nut sleeve 2; the clamping spring 4 is an annular clamping spring 4.

[0049] Specifically, in this application, one or more circles of annular tooth structures can be provided on the plug 31 to form the first teeth 32. One or more circles of annular grooves are machined in the second nut sleeve 2 to form the clamping spring receiving groove 21. The clamping spring 4 is an annular clamping spring 4. There can be one or more clamping springs 4. One clamping spring 4 can be provided in each clamping spring receiving groove 21, or clamping springs 4 can be provided in several of the clamping spring receiving grooves 21, so as to realize the clamping of the positioning plug 3 and the second nut sleeve 2.

[0050] Further, the first teeth 32 are spiral teeth provided on the plug 31; the clamping spring receiving groove 21 is a spiral groove provided in the second nut sleeve 2; the clamping spring 4 is a spiral clamping spring.

[0051] Specifically, in the present application, preferably, a spiral engaging tooth structure is provided on the plug 31 to form the first engaging tooth 32, a spiral groove structure is machined in the second nut sleeve 2 to form a clamping spring accommodating groove 21, and the clamping spring 4 is a spiral clamping spring. This structure is not only convenient for machining and installation, but also, due to the adoption of the spiral structure, the positioning plug 3, the second nut sleeve 2, and the clamping spring 4 are more evenly stressed in the axial length direction, thereby improving the service life of the positioning plug 3 and the second nut sleeve 2 and enhancing the anti-pulling performance of the pile connection.

[0052] Further, the cross-section of the clamping spring 4 is triangular, circular or polygonal.

[0053] Specifically, in the present application, the cross-section of the spiral clamping spring can be set to different shapes. In this embodiment, the cross-section of the spiral clamping spring can be triangular, circular or polygonal. When the cross-section is triangular, circular or polygonal, the shapes of the clamping spring accommodating groove 21 and the first engaging tooth 32 are adapted to the cross-section shape of the clamping spring 4 to achieve the clamping of the positioning plug 3 and the second nut sleeve 2 through spiral clamping springs of different shapes.

[0054] Further, when the cross-section of the clamping spring 4 is circular, after the clamping spring 4 is clamped in the first engaging tooth 32, the outer diameter corresponding to the tooth top of the first engaging tooth 32 is greater than or equal to the diameter corresponding to the center of the cross-section of the clamping spring 4;

[0055] When the cross-section of the clamping spring 4 is triangular, the ratio of the width of the first engaging tooth 32 to the width of the cross-section of the clamping spring 4 is less than or equal to 1 / 2, and the height of the first engaging tooth 32 is the same as the height of the cross-section of the clamping spring 4; the ratio of the height of the first engaging tooth 32 to the groove height of the clamping spring accommodating groove 21 is equal to 1 / 2.

[0056] Specifically, when the cross-section of the clamping spring 4 is circular, after the clamping spring 4 is clamped in the first engaging tooth 32, the outer diameter corresponding to the tooth top of the first engaging tooth 32 is greater than or equal to the diameter corresponding to the center of the cross-section of the clamping spring 4, that is, the mid-diameter of the clamping spring 4. At this time, there is a large clamping part between the first clamping surface 33 on the first engaging tooth 32 and the clamping spring 4, thereby improving the clamping strength; when the cross-section of the clamping spring 4 is triangular, the ratio of the width of the first engaging tooth 32 to the width of the cross-section of the clamping spring 4 is less than or equal to 1 / 2, and the height of the first engaging tooth 32 is the same as the height of the cross-section of the clamping spring 4; the ratio of the height of the first engaging tooth 32 to the groove height of the clamping spring accommodating groove 21 is equal to 1 / 2, enabling effective clamping between the engaging tooth, the clamping spring 4, and the second nut sleeve 2.

[0057] Further, the cross-section of the snap spring 4 is an equilateral triangle. The equilateral triangle cross-section of the snap spring 4 enables the snap spring 4, the plug 31, and the second nut sleeve 2 to be in surface contact during snap connection, thereby obtaining better anti-pulling performance.

[0058] Further, when the cross-section of the spiral snap spring is an equilateral triangle, the ratio of the width of the spiral teeth to the width of the cross-section of the spiral snap spring is less than or equal to 1 / 2, and the height of the spiral teeth is the same as the height of the cross-section of the spiral snap spring; the ratio of the height of the spiral teeth to the groove height of the spiral groove is equal to 1 / 2.

[0059] Further, the spiral teeth are a double-thread spiral tooth structure, the spiral groove is a single-thread spiral groove, the groove pitch P2 of the spiral groove, the pitch P1 of the spiral teeth, and the pitch P3 of the spiral snap spring are the same. The groove height H2 of the spiral groove is twice the cross-section height H3 of the spiral snap spring. The groove width W2 of the spiral groove is the same as the cross-section width W3 of the spiral snap spring. The height H1 of the spiral teeth is the same as the cross-section height H3 of the spiral snap spring. The width W1 of the spiral teeth is 1 / 2 of the cross-section width W3 of the spiral snap spring.

[0060] Specifically, in this embodiment, due to the double-thread spiral tooth structure of the spiral teeth, the single-thread spiral groove, the same groove pitch P2 of the spiral groove, the pitch P1 of the spiral teeth, and the pitch P3 of the spiral snap spring, the groove height H2 of the spiral groove being twice the cross-section height H3 of the spiral snap spring, the groove width W2 of the spiral groove being the same as the cross-section width W3 of the spiral snap spring, the height H1 of the spiral teeth being the same as the cross-section height H3 of the spiral snap spring, and the width W1 of the spiral teeth being 1 / 2 of the cross-section width W3 of the spiral snap spring, the spiral snap spring can be clamped in the spiral teeth after the plug 31 is inserted into any position of the second nut sleeve 2, thus ensuring the effective snap connection between the positioning rod 3 and the second nut sleeve 2. At the same time, since the width W1 of the spiral teeth is 1 / 2 of the cross-section width W3 of the spiral snap spring, when the plug 31, the spiral snap spring, and the second nut sleeve 2 are subjected to a pulling force, the acting force is located at the center of the cross-section of the spiral snap spring, thereby improving the stress performance of the spiral snap spring, increasing the strength of the spiral snap spring, and enhancing the anti-pulling performance of the pile connection.

[0061] Further, a first serrated thread structure is provided inside the second nut sleeve 2. The groove of the first serrated thread structure is a snap spring receiving groove 21, and the side with a larger inclination angle of the non-working edge of the first serrated thread structure is a second snap surface 22;

[0062] The plug 31 is provided with a second serrated thread structure. The second serrated thread structure is a double-thread serrated thread, and the side with a smaller inclination angle of the working edge of the second serrated thread structure is a first snap surface 33.

[0063] In this embodiment, the second nut sleeve 2 is provided with a first serrated thread. The groove of the first serrated thread structure is a clamping spring receiving groove 21, and the non-working side of the first serrated thread structure is a second clamping surface 22; the plug 31 is provided with a second serrated thread structure, the second serrated thread structure is a double-thread serrated thread, and the working side of the second serrated thread structure is a first clamping surface 33, so that the spiral clamping spring has a large contact area with both the first clamping surface 33 and the second clamping surface 22. At the same time, the clamping parts of the second nut sleeve 2 and the plug 31 have strong strength, thereby improving the anti-pulling performance of the pile connection.

[0064] Furthermore, the angle between the non-working side and the working side of the serrated thread is 60°, so that the positioning rod 3, the clamping spring 4 and the second nut sleeve 2 have good force performance, thereby improving the anti-pulling strength.

[0065] Furthermore, the helix direction of the spiral teeth is opposite to the helix direction of the spiral clamping spring on the spiral teeth of the clamping hoop.

[0066] Specifically, in this embodiment, the spiral teeth are arranged in a right-handed direction from the end of the plug 31 towards the positioning rod seat 30;

[0067] After the spiral clamping spring is clamped in the first tooth 32, the spiral clamping spring is arranged in a right-handed direction from the positioning rod seat 30 towards the end of the plug 31. Since the spiral teeth are arranged in a right-handed direction from the end of the plug 31 towards the positioning rod seat 30; after the spiral clamping spring is clamped in the first tooth 32, the spiral clamping spring is arranged in a right-handed direction from the positioning rod seat 30 towards the end of the plug 31, thereby reducing or eliminating the slippage of the positioning rod 3, the spiral clamping spring and the second nut sleeve 2 in the axial direction of the positioning rod 3 under the pulling action.

[0068] Furthermore, the outer diameter D1 corresponding to the tooth top of the first tooth 32 is the same as the inner diameter D2 corresponding to the groove top of the clamping spring receiving groove 21.

[0069] Specifically, the outer diameter D1 corresponding to the tooth top of the first tooth 32 is the same as the inner diameter D2 corresponding to the groove top of the clamping spring receiving groove 21, so that the positioning rod 3 can be effectively inserted into the second nut sleeve 2.

[0070] Furthermore, the tooth top of the first tooth 32 is subjected to a diameter reduction treatment to form a tooth top surface 34; the groove top of the clamping spring receiving groove 21 is subjected to a diameter expansion treatment to form a groove top surface 23; the outer diameter D1 corresponding to the tooth top surface 34 is smaller than the inner diameter D2 corresponding to the groove top surface 23.

[0071] Specifically, in this embodiment, since the diameter of the tooth top of the first engaging tooth 32 is reduced to form the tooth top surface 34, in this application, the diameter reduction process is to process the relatively sharp part of the tooth top through machining to obtain the tooth top surface, so as to remove the relatively sharp part of the tooth tip top, that is, to remove the weak part of the tooth tip top; correspondingly, the diameter of the top of the engaging spring receiving groove 21 is also enlarged, that is, the weak part of the top of the groove is removed; thereby making the outer diameter corresponding to the tooth top surface 34 smaller than the inner diameter corresponding to the groove top surface 23, so that the positioning plug 3 can be conveniently inserted into the second nut sleeve 2 without causing damage to the first engaging tooth 32 or the engaging spring receiving groove 21. At the same time, due to the certain gap between the first engaging tooth 32 and the engaging spring receiving groove 21, the first engaging surface 33 of the first engaging tooth 32 and the engaging spring 4, and the second engaging surface 22 of the engaging spring receiving groove 21 and the engaging spring 4 can be in closer contact, thereby improving the anti-pulling performance of the pile connection.

[0072] Furthermore, the tooth pitch of the spiral engaging teeth is 2.5 mm - 3 mm.

[0073] Specifically, the tooth pitch of the spiral engaging teeth is 2.5 mm - 3 mm. Correspondingly, the groove pitch of the engaging spring receiving groove 21 and the pitch of the spiral engaging spring are both 5 mm - 6 mm. After testing, the strength of the engaging teeth corresponding to this tooth pitch, the engaging spring receiving groove 21 corresponding to the groove pitch, and the spiral engaging spring corresponding to the pitch after being engaged is greater than or equal to the requirements for the connection strength of precast piles in relevant standards.

[0074] Furthermore, the inner diameter of the engaging spring 4 is less than or equal to the diameter corresponding to the tooth root of the first engaging tooth 32.

[0075] Specifically, the inner diameter of the engaging spring 4 is less than the diameter of the tooth bottom of the first engaging tooth 32, so that after the plug 31 is inserted into the second nut sleeve 2, the engaging spring 4 can be firmly clamped in the first engaging tooth 32 of the plug 31, thereby improving the engaging performance between the positioning plug 3 and the second nut sleeve 2.

[0076] Furthermore, the end of the plug 31 is provided with a plug guiding portion 35.

[0077] Specifically, the end of the plug 31 can be an inclined surface or a smooth curved surface so that the diameter at the end face of the plug 31 is the smallest and gradually increases to be the same as the diameter of the engaging portion of the plug 31, thereby forming the plug guiding portion 35, so that during the process of inserting the plug 31 into the second nut sleeve 2, the end of the plug 31 can be conveniently inserted into the spiral engaging spring and the spiral engaging spring can be radially expanded.

[0078] Furthermore, a relief groove 24 is also provided at one end of the second nut sleeve 2 far from the insertion of the plug 31.

[0079] Specifically, a relief groove 24 is further provided at one end of the second nut sleeve 2 away from the insertion end of the plug 31. Due to the provision of the relief groove 24, the root depth of the serrated thread in the second nut sleeve 2 can be ensured to be consistent, thereby improving the connection performance between the positioning rod 3 and the second nut sleeve 2.

[0080] Furthermore, a positioning rod tightening structure 36 is provided at the end of the plug 31.

[0081] Specifically, a polygonal hole is provided at the end of the plug 31, and the positioning rod 3 and the first nut sleeve 1 can be quickly connected by clamping a polygonal screwdriver with a power tool.

[0082] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 7 shown in the figure is the precast pile connection structure disclosed by the present utility model, including: a precast pile body 50 and the mechanical joint of the present application;

[0083] Both ends of the main reinforcement 51 in the precast pile body 50 are respectively connected to the first nut sleeve 1 and the second nut sleeve 2;

[0084] The first nut sleeve 1 is connected to the positioning rod 3, and a clamping spring 4 is provided in the second nut sleeve 2; adjacent two sections of precast piles are connected by means of a clamp through the first nut sleeve 1, the second nut sleeve 2, the positioning rod 3 and the clamping spring 4.

[0085] Specifically, the precast pile includes a precast pile body 50 and a steel reinforcement cage and other structures, and the steel reinforcement cage is arranged in the precast pile body 50; one end of the main reinforcement 51 of the steel reinforcement cage passes through the first main reinforcement connection part 10 of the first nut sleeve 1 and is subjected to upsetting treatment to realize the connection between the first nut sleeve 1 and the main reinforcement 51; the other end of the main reinforcement 51 of the steel reinforcement cage passes through the second main reinforcement connection part 20 of the second nut sleeve 2 and is subjected to upsetting treatment to realize the connection between the second nut sleeve 2 and the main reinforcement 51. In this embodiment, the positioning rod seat 30 is threadedly connected to the positioning rod connection part 11 of the first nut sleeve 1. When two adjacent precast concrete piles are connected, one end of the precast concrete pile provided with the positioning rod 3 can be clamped with one end of the adjacent precast concrete pile provided with the second nut sleeve 2 through the positioning rod 3, the second nut sleeve 2 and the clamping spring 4, thereby realizing the connection between two adjacent precast concrete piles.

[0086] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A mechanical joint for nut sleeve anchoring, characterized in that, Comprising: A first nut sleeve (1), a second nut sleeve (2), a positioning insertion rod (3), and a clamping spring (4); One end of the first nut sleeve (1) is provided with a first main reinforcement connecting portion (10) for connecting with a main reinforcement (51), and the other end is provided with a positioning insertion rod connecting portion (11) for connecting with the positioning insertion rod (3); The positioning insertion rod (3) includes a positioning insertion rod seat (30) and a plug (31) provided on the positioning insertion rod seat (30). The positioning insertion rod seat (30) is connected to the positioning insertion rod connecting portion (11) of the first nut sleeve (1). The plug (31) is provided with first teeth (32), and a first clamping surface (33) is provided on the first teeth (32); One end of the second nut sleeve (2) is provided with a second main reinforcement connecting portion (20) for connecting with a main reinforcement (51), and the other end is provided with a clamping spring receiving groove (21) for receiving the clamping spring (4). A second clamping surface (22) is provided in the clamping spring receiving groove (21); The clamping spring (4) is arranged in the clamping spring receiving groove (21); the plug (31) can be inserted into the second nut sleeve (2). When the plug (31) is inserted into the second nut sleeve (2), the clamping spring (4) can expand radially in the clamping spring receiving groove (21) and then clamp onto the first teeth (32), and the clamping of the positioning insertion rod (3) and the second nut sleeve (2) is achieved through the first clamping surface (33), the second clamping surface (22), and the clamping spring (4).

2. The mechanical joint for nut sleeve anchoring according to claim 1, characterized in that: The first teeth (32) are one or more circles of annular teeth provided on the plug (31); the clamping spring receiving groove (21) is one or more circles of annular grooves provided in the second nut sleeve (2); the clamping spring (4) is an annular clamping spring (4).

3. The mechanical joint for nut and sleeve anchoring according to claim 1, characterized in that: The first teeth (32) are spiral teeth provided on the plug (31); the clamping spring receiving groove (21) is a spiral groove provided in the second nut sleeve (2); the clamping spring (4) is a spiral clamping spring.

4. The mechanical joint for nut sleeve anchoring according to claim 1 or 2, characterized in that: The cross-section of the clamping spring (4) is triangular, circular, or polygonal.

5. The mechanical joint for nut sleeve anchoring according to claim 3, wherein: When the cross-section of the clamping spring (4) is circular, after the clamping spring (4) clamps onto the first teeth (32), the outer diameter corresponding to the tooth tip of the first teeth (32) is greater than or equal to the diameter corresponding to the center of the cross-section of the clamping spring (4); When the cross-section of the clamping spring (4) is triangular, the ratio of the width of the first teeth (32) to the width of the cross-section of the clamping spring (4) is less than or equal to 1 / 2, and the height of the first teeth (32) is the same as the height of the cross-section of the clamping spring (4); the ratio of the height of the first teeth (32) to the groove height of the clamping spring receiving groove (21) is equal to 1 / 2.

6. The mechanical joint for nut sleeve anchoring according to claim 3, characterized in that: The cross-section of the clamping spring (4) is an equilateral triangle.

7. The mechanical joint for nut sleeve anchoring according to claim 6, characterized in that: When the cross-section of the clamping spring (4) is an equilateral triangle, the ratio of the width of the spiral teeth to the width of the cross-section of the spiral clamping spring is less than or equal to 1 / 2, and the height of the spiral teeth is the same as the height of the cross-section of the spiral clamping spring; the ratio of the height of the spiral teeth to the groove height of the spiral groove is equal to 1 / 2.

8. The mechanical joint for nut sleeve anchoring according to claim 7, characterized in that: The spiral teeth are of a double-thread spiral tooth structure, the spiral groove is a single-thread spiral groove, the pitch of the spiral groove, the pitch of the spiral teeth, and the pitch of the spiral clamping spring are the same, the groove height of the spiral groove is 2 times the height of the cross-section of the spiral clamping spring, the groove width of the spiral groove is the same as the width of the cross-section of the spiral clamping spring, the height of the spiral teeth is the same as the height of the cross-section of the spiral clamping spring, and the width of the spiral teeth is 1 / 2 of the width of the cross-section of the spiral clamping spring.

9. The mechanical joint for nut sleeve anchoring according to claim 8, characterized in that: The second nut sleeve (2) is provided with a first serrated thread structure, the groove of the first serrated thread structure is the clamping spring receiving groove (21), and the non-working side of the first serrated thread structure is the second clamping surface (22); The plug (31) is provided with a second serrated thread structure, the second serrated thread structure is a double-thread serrated thread, and the working side of the second serrated thread structure is the first clamping surface (33).

10. The mechanical joint for nut and sleeve anchoring according to claim 9, characterized in that: The angle between the non-working side and the working side of the serrated thread is 60°.

11. The mechanical joint for nut and sleeve anchoring according to any one of claims 3, 5 to 10, characterized in that: The helix direction of the spiral teeth is opposite to the helix direction of the spiral clamping spring on the spiral teeth of the clamp.

12. The mechanical joint for nut and sleeve anchoring according to claim 11, characterized in that: The outer diameter D1 corresponding to the tooth top of the first tooth (32) is the same as the inner diameter D2 corresponding to the groove top of the clamping spring receiving groove (21).

13. The mechanical joint for nut sleeve anchoring according to claim 12, characterized in that: The tooth top of the first tooth (32) is subjected to a necking process to form a tooth top surface (34); the groove top of the clamping spring receiving groove (21) is subjected to an expanding process to form a groove top surface (23); the outer diameter D1 corresponding to the tooth top surface (34) is smaller than the inner diameter D2 corresponding to the groove top surface (23).

14. The mechanical joint for nut sleeve anchoring according to claim 13, characterized in that: The tooth pitch of the spiral teeth is 2.5 mm - 3 mm.

15. The mechanical joint for nut sleeve anchoring according to claim 1, characterized in that: The inner diameter of the clamping spring (4) is equal to or less than the diameter corresponding to the tooth root of the first tooth (32).

16. The mechanical joint for nut sleeve anchoring according to claim 1, characterized in that: The end of the plug (31) is provided with a plug guiding portion (35).

17. The mechanical joint for nut sleeve anchoring according to claim 1, characterized in that: A relief groove (24) is further provided at one end of the second nut sleeve (2) far from the insertion of the plug (31).

18. The mechanical joint for nut sleeve anchoring according to claim 1, characterized in that: The end of the plug (31) is provided with a positioning plug tightening structure (36).

19. A precast pile connection structure, characterized in that, Comprising: A precast pile body (50) and the mechanical joint according to any one of claims 1-18; The main reinforcement bars (51) at both ends of the precast pile body (50) are respectively connected to the first nut sleeve (1) and the second nut sleeve (2); The first nut sleeve (1) is connected to the positioning plug (3), and the second nut sleeve (2) is provided with the clamping spring (4); adjacent two sections of precast piles are fixedly connected through the first nut sleeve (1), the second nut sleeve (2), the positioning plug (3), and the clamping spring (4).

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