Threaded inserting rod type prefabricated pile mechanical connecting piece

Abstract

The utility model discloses a threaded insertion rod type precast pile mechanical connecting piece which comprises a first sleeve, a second sleeve, a lining, an insertion rod and a plurality of occlusion petals, the first sleeve and the second sleeve are both sleeves with one open end, the occlusion petals are attached to form a hollow cylindrical structure in a surrounding mode and provided with an outer circumferential face, the insertion rod comprises an insertion section, a limiting section and a fixing section, and the limiting section is arranged on the outer circumferential face of the insertion rod. The insertion section is inserted among the occlusion petals of the first sleeve, the fixed section is inserted into the open end of the second sleeve and is in threaded connection with the second sleeve, the limiting section is in a circular truncated cone shape, a conical surface section corresponding to the limiting section is arranged on the inner wall of the open end of the first sleeve, and when the insertion rod is inserted into the first sleeve, the insertion section is completely embedded into the first sleeve. The threaded insertion rod type mechanical connecting piece for the precast pile is simple in structure and convenient to install, and the bending resistance of a connecting point is guaranteed while connection is completed.

Description

Technical Field

[0001] This utility model relates to the field of precast pile technology, specifically to a threaded rod type mechanical connector for precast piles. Background Technology

[0002] Precast concrete piles have advantages such as high structural strength and high construction efficiency, and are widely used in building foundation engineering. Among them, a common method for connecting precast piles is to connect and lock them by connecting steel bars in adjacent precast piles with a mechanical connection device.

[0003] Chinese patent CN111827279A discloses a sawtooth-shaped quick connector for pipe piles. Its key technical features are: it includes an upper embedded part and a lower embedded part, both of which are open at one end. The upper embedded part is threadedly fixed with a bushing. The inner wall of the bushing is provided with a conical surface. The bushing is provided with several interlocking petals. When the several interlocking petals are at the lowest end of the bushing, they are connected to form a frustum-shaped cone. The inner wall of the interlocking petals is provided with multiple tooth grooves at equal intervals along the length direction. The lower embedded part is threadedly fixed with a plug that engages with the interlocking petals. The plug has multiple teeth that fit into the tooth grooves.

[0004] In practical application of the above scheme, a common problem is that the top of the lower embedded part needs to be machined into an embedded ring edge structure that can fit into the embedded ring groove of the upper embedded part. This causes the open end of the lower embedded part to protrude from the end face of the pile. During transportation and construction, the lower embedded part may deform after being squeezed or impacted, making it unable to fit into the embedded ring groove of the upper embedded part and thus unable to connect. Therefore, a new scheme is needed to avoid the situation where the corresponding structure cannot be connected due to deformation. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by proposing a simple and easy-to-install threaded rod type precast pile mechanical connector. The threaded rod connects the sleeves on both sides, and the embedding of the threaded rod into the sleeve improves the bending resistance of the connection, avoiding the situation where the sleeve end protrudes from the end face of the pile and is easily squeezed or damaged, resulting in deformation and inability to install.

[0006] This utility model is achieved through the following technical solution:

[0007] A threaded insert type precast pile mechanical connector includes a first sleeve, a second sleeve, a bushing, an insert rod, and multiple engagement flaps, wherein the first sleeve and the second sleeve are both sleeves with one end open;

[0008] The first sleeve has a bushing at its open end, and the internal space formed by the bushing and the first sleeve has multiple engagement flaps. A compression spring is provided between the engagement flaps and the inner end face of the first sleeve. The second sleeve has an insertion rod at its open end that engages with the multiple engagement flaps.

[0009] The multiple interlocking flaps fit together to form a hollow columnar structure with an outer cylindrical surface. The outer cylindrical surface has a spiral groove, and a spiral spring is fitted into the spiral groove.

[0010] The insertion rod includes an insertion section, a limiting section, and a fixing section. The insertion section is inserted between the plurality of engagement petals of the first sleeve, and the fixing section is inserted into the open end of the second sleeve and threadedly connected to the second sleeve.

[0011] The limiting section is shaped like a frustum. The end of the limiting section with a smaller radius is connected to the insertion section, and the end of the limiting section with a larger radius is connected to the fixing section. After the insertion rod is connected to the second sleeve through the fixing section, the end face of the frustum of the limiting section with a larger radius abuts against the end face of the open end of the second sleeve.

[0012] The inner wall of the open end of the first sleeve is provided with a conical section corresponding to the limiting section. When the insertion rod is inserted into the first sleeve, the insertion section is completely embedded in the first sleeve.

[0013] As a further improvement of this utility model, the outer surface of the insertion section is provided with insertion teeth, and the inner surface of the hollow columnar structure composed of the multiple biting flaps is provided with biting grooves corresponding to the insertion teeth.

[0014] As a further improvement of this utility model, the pitch of the spiral groove is equal to the pitch of the spiral spring in its natural state.

[0015] As a further improvement of this utility model, the depth of the spiral groove is greater than or equal to the cross-sectional diameter of the spiral spring.

[0016] As a further improvement of this utility model, the outer surface of the engagement flap corresponding to the end of the spiral groove is spot-welded to the end of the spiral spring for fixed connection.

[0017] As a further improvement of this utility model, the end face of the bushing facing the opening direction of the first sleeve is provided with four force-bearing grooves at equal angles.

[0018] As a further improvement of this utility model, the first sleeve and the second sleeve are cylindrical sleeves.

[0019] As a further improvement of this utility model, the end face radius of the large radius end of the limiting segment is smaller than the outer diameter of the open end of the second sleeve.

[0020] As a further improvement of this utility model, the outer diameters of the first sleeve and the second sleeve are equal.

[0021] As a further improvement of this utility model, the two ends of the compression spring are machined into rings.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: the threaded insertion rod is threadedly connected to the second sleeve, and the frustum-shaped limiting section is fitted with the first sleeve, which improves the bending resistance of the connection point. The sleeves on both sides no longer need to be embedded in the ring edge and the ring groove, which can ensure that the end of the sleeve does not protrude from the end face of the pile, and avoid the situation where deformation and inability to connect occurs after squeezing or damage. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a connection diagram of the threaded rod type precast pile mechanical connector of this utility model;

[0025] Figure 2 This is an exploded structural diagram of the threaded insertion rod type precast pile mechanical connector of this utility model;

[0026] Figure 3 This is an assembly diagram of multiple interlocking segments of the threaded insert type precast pile mechanical connector of this utility model;

[0027] Figure 4 This is a structural diagram of a single interlocking flap of the threaded rod type precast pile mechanical connector of this utility model;

[0028] Figure 5 This is a cross-sectional view of the first sleeve of the threaded insertion rod type precast pile mechanical connector of this utility model;

[0029] Figure 6 This is a schematic diagram of the insert structure of the threaded insert type precast pile mechanical connector of this utility model;

[0030] Figure 7 This is a schematic diagram of the bushing installation of the threaded rod type precast pile mechanical connector of this utility model;

[0031] Figure 8 This is a schematic diagram of the compression spring structure of the threaded insertion rod type precast pile mechanical connector of this utility model. Detailed Implementation

[0032] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0034] A threaded insert type precast pile mechanical connector includes a first sleeve 1, a second sleeve 2, a bushing 4, an insert rod 3 and multiple engagement flaps 5, wherein the first sleeve 1 and the second sleeve 2 are both sleeves with one end open.

[0035] The open end of the first sleeve 1 is provided with a bushing 4, which is threaded to the inner wall of the first sleeve 1. The internal space formed by the bushing 4 and the first sleeve 1 is provided with multiple engagement flaps 5. A compression spring 6 is provided between the engagement flaps and the inner cavity end face of the first sleeve 1. The open end of the second sleeve 2 is provided with a plug rod 3 that engages with the multiple engagement flaps 5.

[0036] Multiple occlusal flaps 5 fit together to form a hollow columnar structure, and have an outer cylindrical surface 7. The outer cylindrical surface 7 has a spiral groove 9, and a spiral spring 10 is fitted into the spiral groove 9.

[0037] The insert rod 3 includes an insertion section 11, a limiting section 12, and a fixing section 13. The insertion section 11 is inserted between multiple engagement petals 5 of the first sleeve 1, and the fixing section 13 is inserted into the open end of the second sleeve 2 and threadedly connected to the second sleeve 2.

[0038] The limiting section 12 is in the shape of a frustum. The end of the limiting section 12 with a smaller radius is connected to the insertion section 11, and the end of the limiting section 12 with a larger radius is connected to the fixing section 13. After the insertion rod 3 and the second sleeve 2 are connected through the fixing section 13, the end face of the frustum of the limiting section 12 with a larger radius abuts against the end face of the open end of the second sleeve 2.

[0039] The inner wall of the open end of the first sleeve 1 is provided with a conical section 14 corresponding to the limiting section 12. When the insertion rod 3 is inserted into the first sleeve 1, the insertion section 11 is completely embedded in the first sleeve 1.

[0040] The outer surface of the insertion section 11 is provided with insertion teeth 15, and the inner surface of the hollow column composed of multiple biting petals 5 is provided with biting grooves 16 corresponding to the insertion teeth 15. After the insertion rod 3 is inserted, the insertion teeth 15 are embedded in the biting grooves 16 to prevent the insertion rod 3 from falling out.

[0041] The mechanical connector is used as follows: Before connection, the compression spring 6, multiple engagement petals 5 fitted with a helical spring 10, and bushing 4 are installed into the first sleeve 1, and the insertion rod 3 is installed into the second sleeve 2. During connection, the second sleeve 2 containing the insertion rod 3 is moved closer to the first sleeve 1. The insertion rod 3 passes through the bushing 4 and pushes against the multiple engagement petals 5. As the insertion rod 3 is inserted, the engagement petals move and compress the compression spring 6. At the same time, the multiple engagement petals 5 separate, causing the enclosed hollow cylindrical space to expand, making it easier for the insertion rod 3 to be inserted. After the insertion rod 3 is fully inserted, under the combined action of the compression spring 6 and the helical spring 10, the multiple engagement petals 5 move back towards the bushing 4 and tightly wrap around the insertion rod 3. At this time, the insertion teeth 15 are embedded in the engagement tooth grooves 16.

[0042] The pitch of the spiral groove 9 is equal to the pitch of the helical spring 10 in its natural state. Designing the pitch of the spiral groove 9 to be equal to the pitch of the helical spring 10 in its natural state can prevent the helical spring 10 from being in an axially compressed state for a long time, thus affecting the lifespan of the helical spring 10.

[0043] In this embodiment, the depth of the spiral groove 9 is greater than or equal to the cross-sectional diameter of the spiral spring 10. The depth of the spiral groove 9 is sufficient for the spiral spring 10 to completely fit within the spiral groove 9, which can prevent the spiral spring 10 from excessively protruding outward and affecting the axial movement of the engagement flap. The outer surface of the engagement flap corresponding to the end of the spiral groove 9 is spot-welded to the end of the spiral spring 10 for fixed connection. After one end of the spiral spring 10 is welded and fixed to the engagement flap, when the engagement flap separates, since one end of the spiral spring 10 is fixed, the spiral spring 10 deforms but will not detach from the spiral groove 9, nor will it move relative to the engagement flap.

[0044] The end face of the bushing 4 facing the opening direction of the first sleeve 1 is provided with four force grooves 19 at equal angles. When the bushing 4 is installed into the first sleeve 1, the tool can operate the bushing 4 through the force grooves 19.

[0045] In this embodiment, the first sleeve 1 and the second sleeve 2 are cylindrical sleeves with equal outer diameters, and the end face radius of the larger radius end of the limiting section 12 is smaller than the outer diameter of the open end of the second sleeve 2. The first sleeve 1 and the second sleeve 2 can be manufactured using blanks with the same outer diameter specification, and after connection, since the insert rod 3 is embedded in the first sleeve 1, the abutment of the first sleeve 1 and the second sleeve 2 can be observed from the outside. The edge of the abutment position is then welded to strengthen the connection.

[0046] In this embodiment, to ensure that the compression spring 6 does not slip or bend under pressure and that the force is distributed more evenly, both ends of the compression spring 6 are machined into ring shapes, such as... Figure 8 As shown.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A threaded insert type precast pile mechanical connector, comprising a first sleeve, a second sleeve, a bushing, an insert rod, and multiple engagement flaps, wherein the first sleeve and the second sleeve are both sleeves with one end open, characterized in that: The first sleeve has a bushing at its open end, and the internal space formed by the bushing and the first sleeve has multiple engagement flaps. A compression spring is provided between the engagement flaps and the inner end face of the first sleeve. The second sleeve has an insertion rod at its open end that engages with the multiple engagement flaps. The multiple occlusal flaps fit together to form a hollow columnar structure with an outer cylindrical surface. The outer cylindrical surface has a spiral groove, and a spiral spring is provided in the spiral groove. The insertion rod includes an insertion section, a limiting section, and a fixing section. The insertion section is inserted between the plurality of engagement petals of the first sleeve, and the fixing section is inserted into the open end of the second sleeve and threadedly connected to the second sleeve. The limiting section is shaped like a frustum. The end of the limiting section with a smaller radius is connected to the insertion section, and the end of the limiting section with a larger radius is connected to the fixing section. After the insertion rod is connected to the second sleeve through the fixing section, the end face of the frustum of the limiting section with a larger radius abuts against the end face of the open end of the second sleeve. The inner wall of the open end of the first sleeve is provided with a conical section corresponding to the limiting section. When the insertion rod is inserted into the first sleeve, the insertion section is completely embedded in the first sleeve.

2. The threaded insertion rod type precast pile mechanical connector according to claim 1, characterized in that: The outer surface of the insertion section is provided with insertion teeth, and the inner surface of the hollow column formed by the multiple occlusal flaps is provided with occlusal grooves corresponding to the insertion teeth.

3. The threaded insertion rod type precast pile mechanical connector according to claim 1, characterized in that: The pitch of the helical groove is equal to the pitch of the helical spring in its natural state.

4. The threaded insertion rod type precast pile mechanical connector according to claim 1, characterized in that: The depth of the spiral groove is greater than or equal to the cross-sectional diameter of the helical spring.

5. The threaded insertion rod type precast pile mechanical connector according to claim 1, characterized in that: The outer surface of the engagement flap corresponding to the end of the spiral groove is spot-welded to the end of the spiral spring for fixed connection.

6. The threaded insertion rod type precast pile mechanical connector according to claim 1, characterized in that: The end face of the bushing facing the opening direction of the first sleeve is provided with circumferentially distributed force grooves.

7. The threaded insertion rod type precast pile mechanical connector according to claim 1, characterized in that: The first sleeve and the second sleeve are cylindrical sleeves.

8. The threaded insertion rod type precast pile mechanical connector according to claim 7, characterized in that: The radius of the end face of the large-radius end of the limiting section is smaller than the outer diameter of the open end of the second sleeve.

9. The threaded insertion rod type precast pile mechanical connector according to claim 8, characterized in that: The outer diameters of the first sleeve and the second sleeve are equal.

10. The threaded insertion rod type precast pile mechanical connector according to claim 1, characterized in that: The two ends of the compression spring are machined into ring shapes.

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