Clamping spring for precast pile connection

Abstract

The utility model discloses a clamping spring for precast pile connection, which is a spiral clamping spring. The cross section of the spiral clamping spring comprises a first edge, a second edge and a third edge; the first edge is used for being clamped with the first clamping surface of the spiral clamping teeth on the positioning insertion rod; the second edge is used for being clamped with the second clamping surface of the spiral clamping teeth on the positioning insertion rod; the third edge is used for being clamped with the third clamping surface in the spring clamping nut; and the spiral clamping spring can be clamped in the spiral clamping teeth on the positioning insertion rod through the first edge and the second edge, and is clamped with the spring clamping nut through the third edge. According to the clamping spring used for precast pile connection, due to the fact that the spiral clamping spring structure is arranged, the acting face between the positioning inserting rod and the spring clamping nut is increased, stress is even, and then the connecting strength and the clamping performance of the clamping spring are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of precast pile connection, in particular to a clamping spring for precast pile connection. Background Art

[0002] In construction, the docking of precast components is an essential process. There are generally two traditional methods for connecting precast components. One method is to provide end plates at both ends of the precast components, and the connection of the precast components is realized by welding between the end plates. However, this method has problems such as complex construction process and affecting construction efficiency. Another method is to use a mechanical joint for connection. However, in the existing mechanical joint with a structure of clamping by a clamping spring, the clamping spring is generally a single-loop annular clamping spring. The plug is inserted into the clamping spring, and the connection between the positioning plug rod and the spring clamping nut is realized through the clamping spring. However, when using a single-loop clamping spring to clamp with the positioning plug rod and the spring clamping nut, the contact area between the clamping spring and the plug and the spring clamping nut is small, resulting in concentrated stress, which affects its strength and service life. Summary of the Utility Model

[0003] The utility model provides a clamping spring for precast pile connection in view of the above problems.

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

[0005] A clamping spring for precast pile connection, the clamping spring is a spiral clamping spring. The cross-section of the spiral clamping spring includes a first side for clamping with the first clamping surface of the spiral teeth on the positioning plug rod, a second side for clamping with the second clamping surface of the spiral teeth on the positioning plug rod, and a third side for clamping with the third clamping surface in the spring clamping nut. The spiral clamping spring can be clamped in the spiral teeth on the positioning plug rod through the first side and the second side, and is clamped with the spring clamping nut through the third side.

[0006] Further, the lengths of the first side, the second side and the third side of the spiral clamping spring are equal, so that the cross-section of the spiral clamping spring is an equilateral triangle.

[0007] Further, the ratio of the side length of the spiral clamping spring to the width of the spiral teeth on the positioning plug rod is 2:1.

[0008] Further, the height of the spiral clamping spring is the same as the height of the spiral teeth on the positioning plug rod.

[0009] Further, the pitch of the spiral clamping spring is 5 mm - 6 mm.

[0010] Compared with the prior art, the clamping spring for precast pile connection disclosed by the utility model has the following beneficial effects: The clamping spring for precast pile connection disclosed by the utility model, due to being set as a spiral clamping spring structure, increases the acting surface between the positioning plug and the spring clamping nut, makes the force uniform, and thus improves its connection strength and clamping performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a structural diagram of the clamping spring for precast pile connection disclosed by the utility model;

[0012] Figure 2 is a cross-sectional view of the clamping spring disclosed by the utility model;

[0013] Figure 3 is a structural diagram of a mechanical joint using the clamping spring disclosed by the utility model;

[0014] Figure 4 is a structural diagram of the positioning plug in the mechanical joint disclosed by the utility model;

[0015] Figure 5 is a structural diagram of the spring clamping nut in the mechanical joint disclosed by the utility model;

[0016] Figure 6 is a structural diagram of an embodiment of a pile connection structure using the mechanical structure disclosed by the utility model;

[0017] Figure 7 is a structural diagram of another embodiment of a pile connection structure using the mechanical structure disclosed by the utility model;

[0018] Figure 8 is a structural diagram of another embodiment of a pile connection structure using the mechanical structure disclosed by the utility model.

[0019] In the figures: 1, spiral clamping spring; 10, first side; 11, second side; 12, third side; 2, positioning plug; 20, positioning plug seat; 21, plug; 22, spiral teeth; 23, first clamping surface; 24, second clamping surface; 3, spring clamping nut; 30, clamping spring receiving groove; 31, third clamping surface; 4, end plate; 50, large nut sleeve; 51, small nut sleeve; 52, main reinforcement; 53, precast pile body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] As Figure 1 and Figure 2The clamping spring for prefabricated pile connection disclosed in the present embodiment is a spiral clamping spring 1, and the cross-section of the spiral clamping spring 1 includes a first edge 10 for clamping with a first clamping surface 23 of a spiral clamping tooth 22 on a positioning rod 2, a second edge 11 for clamping with a second clamping surface 24 of the spiral clamping tooth 22 on the positioning rod 2, and a third edge 12 for clamping with a third clamping surface 31 in a spring clamping nut 3. The spiral clamping spring 1 can be clamped in the spiral clamping tooth 22 on the positioning rod 2 through the first edge 10 and the second edge 11, and can be clamped with the spring clamping nut 3 through the third edge 12.

[0021] Specifically, Figure 3 FIG. 1 is an embodiment of a mechanical joint for connecting prefabricated piles using a spiral clamping spring disclosed in the present application. In the embodiment, the mechanical joint includes a spiral clamping spring 1, a positioning rod 2, and a spring clamping nut 3. Figure 4 As shown, the positioning rod 2 includes a cylindrical positioning rod seat 20, a cylindrical plug 21 is provided on the positioning rod seat 20, and a spiral clamping tooth 22 is provided on the plug 21. The side of the spiral clamping tooth 22 facing the positioning rod seat 20 is a first clamping surface 23, and the side of the spiral clamping tooth 22 away from the positioning rod seat 20 is a second clamping surface 24; Figure 5 As shown, a clamping spring accommodating groove 30 is provided in the spring clamping nut 3, and the clamping spring accommodating groove 30 is a spiral groove arranged in the spring clamping nut 3, and the groove wall surface of the clamping spring accommodating groove 30 facing away from the plug insertion end is a third clamping surface 31; the spiral clamping spring 1 can be placed in the clamping spring accommodating groove 30, and when the plug 21 is inserted into the spring clamping nut 3, the spiral clamping spring 1 is clamped in the spiral clamping tooth 22 on the plug 21 after radially opening in the clamping spring accommodating groove 30, so that the first side 10 of the cross section of the spiral clamping spring 1 is clamped with the first clamping surface 23 of the spiral clamping tooth 22, the second side 11 of the cross section of the spiral clamping spring 1 is clamped with the second clamping surface 24 of the spiral clamping tooth 22, and the third side 12 of the cross section of the spiral clamping spring 1 is clamped with the third clamping surface 31 in the spring clamping nut 3, thereby realizing the clamping of the positioning rod 2, the spiral clamping spring 1 and the spring clamping nut 3.

[0022] like Figure 6Shown is an embodiment of using the mechanical joint disclosed in the above embodiment for precast pile connection. In this embodiment, small nut sleeves 51 and large nut sleeves 50 are respectively connected to both ends of the main reinforcement bars 52 inside the precast pile body. The positioning plug seat 20 is connected to the small nut sleeve 51, and the spring clamping nut 3 is connected to the large nut sleeve 50 (the outer wall of the spring clamping nut is provided with external threads). A spiral clamping spring 1 is arranged inside the spring clamping nut 3. When two adjacent precast piles are connected, the end of the upper pile with a positioning plug can be inserted into the end of the lower pile with a spring clamping nut, so that the plug is inserted into the spring clamping nut, and the positioning plug, the spiral clamping spring, and the spring clamping nut are clamped to realize the connection of the precast piles. The clamping spring for precast pile connection disclosed by the present utility model, due to being arranged in a spiral clamping spring structure, correspondingly, the positioning plug is provided with spiral teeth, so that the acting surface between the positioning plug, the spiral clamping spring, and the spring clamping nut is a spiral surface, increasing the acting area between the positioning plug and the spring clamping nut, making the force evenly distributed, and thus improving its connection strength and clamping performance.

[0023] As Figure 7 Shown is another embodiment of using the mechanical joint disclosed in the above embodiment for precast pile connection. In this embodiment, both ends of the main reinforcement bars 52 inside the precast pile body are respectively connected to the end plates 4. The positioning plug seat 20 is connected to the tensioning and anchoring holes on one end plate 4, and the spring clamping nut 3 is connected to the tensioning and anchoring holes on the other end plate 4 (the outer wall of the spring clamping nut is provided with external threads). A spiral clamping spring 1 is arranged inside the spring clamping nut 3. When two adjacent precast piles are connected, the end of the upper pile with a positioning plug can be inserted into the end of the lower pile with a spring clamping nut, so that the plug is inserted into the spring clamping nut, and the positioning plug, the spiral clamping spring, and the spring clamping nut are clamped to realize the connection of the precast piles. This structure can achieve the rapid connection between concrete piles, realize the assembled connection without changing the existing precast pile manufacturing process, has reliable connection, and low comprehensive cost.

[0024] As Figure 8 Shown is another embodiment of using the mechanical joint disclosed in the above embodiment for precast pile connection. In this embodiment, one end of the spring clamping nut 3 is provided with a main reinforcement bar connection structure for connecting with the main reinforcement bar. Both ends of the main reinforcement bars 52 inside the precast pile body are respectively connected to the small nut sleeve 51 and the spring clamping nut 3. The positioning plug seat 20 is connected to the small nut sleeve 51, and the spring clamping nut 3 is connected to the spring clamping nut 3 (the outer wall of the spring clamping nut is provided with external threads). A spiral clamping spring 1 is arranged inside the spring clamping nut 3. When two adjacent precast piles are connected, the end of the upper pile with a positioning plug can be inserted into the end of the lower pile with a spring clamping nut, so that the plug is inserted into the spring clamping nut, and the positioning plug, the spiral clamping spring, and the spring clamping nut are clamped to realize the connection of the precast piles.

[0025] Further, the lengths of the first side 10, the second side 11, and the third side 12 of the spiral snap spring 1 are equal, such that the cross-section of the spiral snap spring 1 is an equilateral triangle.

[0026] Specifically, when the cross-section of the spiral snap spring is an equilateral triangle, it can make the spiral snap spring, the plug, and the spring snap nut in surface contact during snap connection, and the forces on each surface are more uniform, so as to obtain better anti-pulling performance.

[0027] Further, the ratio of the side length W1 of the spiral snap spring 1 to the width W2 of the spiral teeth 22 on the positioning plug 2 is 2:1, and the height H1 of the spiral snap spring 1 is the same as the height H2 of the spiral teeth 22 on the positioning plug 2.

[0028] Specifically, when the cross-section of the spiral snap spring 3 is an equilateral triangle, the ratio of the width W2 of the spiral teeth to the side length W1 of the cross-section of the spiral snap spring is 2:1, and the height H2 of the spiral teeth is the same as the height H1 of the cross-section of the spiral snap spring; the ratio of the height H2 of the spiral teeth to the groove height H3 of the snap spring receiving groove is 1:2, so that the teeth, the snap spring, and the spring snap nut can be effectively snap-connected.

[0029] Further, the pitch of the spiral snap spring 1 is 5 mm - 6 mm.

[0030] Specifically, the pitch of the spiral snap spring 1 is 5 mm - 6 mm. Correspondingly, the pitch of the spiral teeth 12 is 2.5 mm - 3 mm. After testing, the connection strength of the teeth corresponding to this pitch, the snap spring receiving groove corresponding to the groove pitch, and the spiral snap spring corresponding to the pitch is greater than or equal to the requirement for the connection strength of precast piles in relevant standards.

[0031] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A clamping spring for precast pile connection, characterized in that: The snap spring is a spiral snap spring (1). The cross-section of the spiral snap spring (1) includes a first side (10) for snapping with a first snap surface (23) of the spiral snap teeth (22) on the positioning plug (2), a second side (11) for snapping with a second snap surface (24) of the spiral snap teeth (22) on the positioning plug (2), and a third side (12) for snapping with a third snap surface (31) in the spring snap nut (3). The spiral snap spring (1) can be clamped in the spiral snap teeth (22) on the positioning plug (2) through the first side (10) and the second side (11), and is snapped with the spring snap nut (3) through the third side (12).

2. The clamping spring for precast pile connection according to claim 1, wherein: The first side (10), the second side (11), and the third side (12) of the spiral snap spring (1) are equal in length, so that the cross-section of the spiral snap spring (1) is an equilateral triangle.

3. The snap spring for precast pile connection according to claim 2, characterized in that: The ratio of the side length of the spiral snap spring (1) to the width of the spiral snap teeth (22) on the positioning plug (2) is 2:

1.

4. The clamping spring for precast pile connection according to claim 3, characterized in that: The height of the spiral snap spring (1) is consistent with the height of the spiral snap teeth (22) on the positioning plug (2).

5. The snap spring for precast pile connection according to claim 4, characterized in that: The pitch of the spiral snap spring (1) is 5 mm - 6 mm.

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