Lower sleeve packaging device of bolt type mechanical connection joint

Abstract

The utility model discloses a lower sleeve packaging device of a bolt type mechanical connecting joint, which comprises a cylindrical packaging body, a central through hole and an external thread connecting part of the outer diameter of the packaging body, the packaging body is in threaded connection with a lower sleeve through the external thread connecting part, a connecting groove is arranged at the bottom of the cylindrical packaging body, and the central through hole is arranged in the connecting groove. A lower seam allowance is arranged below the connecting groove along the bottom of the packaging body; the opening diameter of the lower spigot is smaller than the inner diameter of the connecting groove. The packaging device has the advantages that the connecting groove is formed in the bottom of the packaging body, semi-embedded type retaining connection between the buckling barrel and the packaging device can be achieved, the bending resistance can be effectively improved, and the lower spigot with the opening diameter smaller than the inner diameter of the connecting groove can effectively prevent the buckling barrel from being disengaged from the connecting groove, so that the problems of connection quality and the like are solved; and in addition, preassembly of the buckling cylinder and the packaging device can be achieved, the on-site installation steps are reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a connecting device for concrete piles, in particular to a lower sleeve encapsulation device for a plug-in mechanical connection joint, belonging to the technical field of concrete precast production. Background Art

[0002] At present, in foundation engineering, precast piles are widely used and often in the form of multi-section piles. When connecting piles, the upper and lower section piles are mainly connected by welding the end plates at the adjacent pile ends. This welding connection method not only requires a high technical level of construction workers, but is also greatly affected by external weather and the level differences of on-site construction workers, easily resulting in large quality differences in the welding of piles, and it is difficult to control the welding quality, thus leading to potential safety hazards in the connection structure at the pile head of precast piles. In order to solve the quality hidden dangers of on-site welding construction in some projects, mechanical connections are adopted, realizing the avoidance of welding during the on-site installation of precast piles, such as plug-in mechanical connection joints.

[0003] The existing plug connection is assembled from parts such as upper and lower sleeves, a plug rod, a spring, an intermediate nut, a retaining cylinder, etc. The upper sleeve is pre-embedded in the upper section of the precast pile, the plug rod is connected in the upper sleeve, and the three parts of the intermediate nut, the retaining cylinder, and the spring are installed independently. When installing, the operator needs to install the spring, the retaining cylinder, and the intermediate nut one by one in one of the sleeves first, or assemble the spring and the retaining cylinder into one body first and then install them into one of the sleeves, and then install the intermediate nut. This structure has many installation steps, increasing the workload of the operator and affecting the installation efficiency and quality.

[0004] Especially in the existing technology, usually the spring at the bottom of the retaining cylinder makes the retaining cylinder and the intermediate nut adopt a contact connection. For example, Chinese Patent CN 219158180 U discloses a plug-in sleeve joint for steel bars, which is to make the top of the expansion buckle contact the bottom of the sleeve through the spring pressing against the expansion buckle. There are problems in the existing technology that the bending resistance of the expansion buckle and the sleeve is weak. During the use of multi-section piles, they will be affected by lateral forces, resulting in the plug rod being affected by bending forces. The conical surface at the top of the expansion buckle will tilt and change with the opening conical surface at the bottom of the inner diameter of the sleeve, and even come off, causing the connection to fail and affecting the connection reliability.

[0005] The intermediate nut of the existing plug-in mechanical connection joint only plays a simple encapsulation role. Although the structure is simple, it cannot prevent the problem of the expansion buckle tilting and slipping off. Summary of the Invention

[0006] Purpose of the invention: The purpose of the utility model is to address the problems existing in the prior art and to provide a lower sleeve packaging device for a latch-type mechanical connecting joint, which can achieve rapid installation of the components in the lower sleeve of the latch-type mechanical connecting joint and prevent the buckle tube from slipping and affecting the connection reliability of the entire connecting joint.

[0007] Technical solution: A lower sleeve packaging device for a plug-in mechanical connecting joint, comprising a cylindrical packaging body, a central through hole and an external threaded connection portion on the outer diameter of the packaging body, the packaging body being threadedly connected to the lower sleeve via the external threaded connection portion, a connecting groove being provided at the bottom of the cylindrical packaging body, a lower stop being provided below the connecting groove along the bottom of the packaging body; the opening diameter of the lower stop being smaller than the inner diameter of the connecting groove.

[0008] The utility model provides a connecting groove at the bottom of the packaging body to achieve a semi-embedded stop connection between the buckle tube and the packaging device, which can effectively improve the bending resistance. The lower stop with an opening diameter smaller than the inner diameter of the connecting groove can effectively prevent the buckle tube from escaping from the connecting groove, thereby causing problems such as connection quality; and it can achieve pre-assembly of the buckle tube and the packaging device, reducing the steps of on-site installation and improving assembly efficiency.

[0009] Preferably, in order to improve the anti-slip performance and bending resistance while reducing the difficulty of processing, the connecting groove is a rectangular inner groove. The rectangular inner groove has low processing difficulty and can reduce costs. The small-diameter lower stop can effectively prevent the buckle tube from slipping and separating from the packaging device due to the influence of bending force.

[0010] Preferably, in order to improve the stability of the connection between the buckle tube and the packaging device, the connection groove is an arc-shaped inner groove. The arc-shaped inner groove cooperates with the outer diameter of the spherical surface of the buckle tube to achieve mutual clasping under the premise of preventing falling off, thereby improving the stability of the connection.

[0011] Preferably, in order to reduce the inner diameter of the buckle tube and improve the connection quality and reliability, an inner cone is provided between the central through hole and the connection groove, and the diameter of the upper edge of the connection groove is equal to the bottom diameter of the inner cone. The inner diameter of the buckle tube can be reduced by squeezing the outer cone at the top of the buckle tube by the inner cone, thereby achieving a reliable connection between the insertion rod and the buckle tube. The diameter of the top of the inner cone is equal to the diameter of the central through hole, which can reduce the difficulty of processing and reduce costs.

[0012] Preferably, in order to improve the connection efficiency during the installation process, an inner cone is provided between the central through hole and the connection groove, the diameter of the upper edge of the connection groove is larger than the bottom diameter of the inner cone, and a circular upper stop is formed at the junction of the upper edge of the connection groove and the inner cone. The upper stop forms an upper limit structure, which can accurately control the upward position of the buckle barrel and control the stroke of the entire buckle barrel to avoid excessive upward stroke affecting the connection efficiency.

[0013] Preferred option: For the convenience of inserting the buckle cylinder, a chamfer is provided on the outer side of the lower stop. The chamfer structure of the lower stop plays a role in guiding the installation, which can make it more convenient to insert the front end of the buckle cylinder, improve the assembly efficiency, and reduce the assembly difficulty.

[0014] Beneficial effects: By providing a connection groove at the bottom of the encapsulation body, the present utility model can achieve a semi-embedded anti-withdrawal connection between the buckle cylinder and the encapsulation device, effectively improving the bending resistance. The lower stop with an opening diameter smaller than the inner diameter of the connection groove can effectively prevent the buckle cylinder from disengaging from the connection groove, thus avoiding problems such as connection quality. And it can achieve the pre-assembly of the buckle cylinder and the encapsulation device, reducing the on-site installation steps and improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0016] Figure 1 It is a schematic structural diagram of the assembly state of the present utility model;

[0017] Figure 2 It is a three-dimensional view of the present utility model;

[0018] Figure 3 It is a cross-sectional view of the first embodiment of the present utility model;

[0019] Figure 4 It is a cross-sectional view of the second embodiment of the present utility model;

[0020] Figure 5 It is a cross-sectional view of the third embodiment of the present utility model;

[0021] Figure 6 It is a cross-sectional view of the fourth embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0024] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but are in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0025] As Figures 1-6 shown, a lower sleeve encapsulation device of a plug-type mechanical connection joint includes a cylindrical encapsulation body 1, a central through hole 2 and an external thread connection portion 3 on the outer diameter of the encapsulation body 1. The encapsulation body 1 is threadedly connected to the lower sleeve through the external thread connection portion 3. A connection groove 4 is provided at the bottom of the cylindrical encapsulation body 1, and a lower stop 41 is provided along the bottom of the encapsulation body 1 below the connection groove 4; the opening diameter of the lower stop 41 is smaller than the inner diameter of the connection groove 4.

[0026] By providing the connection groove 4 at the bottom of the encapsulation body 1, the present utility model can achieve a semi-embedded anti-withdrawal connection between the buckle barrel and the encapsulation device, effectively improving the bending resistance. The lower stop 41 with an opening diameter smaller than the inner diameter of the connection groove 4 can effectively prevent the buckle barrel from disengaging from the connection groove 4, thus avoiding problems such as connection quality; and it can achieve the pre-assembly of the buckle barrel and the encapsulation device, reducing the on-site installation steps and improving the assembly efficiency. Embodiment

[0027] As Figure 3As shown in the figure, a lower sleeve encapsulation device for a plug - type mechanical connection joint includes a cylindrical encapsulation body 1, a central through - hole 2, and an external - thread connection part 3 on the outer diameter of the encapsulation body 1. The encapsulation body 1 is thread - connected to the lower sleeve through the external - thread connection part 3. A connection groove 4 is provided at the bottom of the cylindrical encapsulation body 1, and a lower stop 41 is provided along the bottom of the encapsulation body 1 below the connection groove 4; the opening diameter of the lower stop 41 is smaller than the inner diameter of the connection groove 4. The connection groove 4 is a rectangular inner groove. An inner conical surface 5 is provided between the central through - hole 2 and the connection groove 4, and the diameter of the upper edge of the connection groove 4 is equal to the diameter of the bottom of the inner conical surface 5. A chamfer is provided on the outside of the lower stop 41. Embodiment

[0028] As Figure 4 As shown in the figure, a lower sleeve encapsulation device for a plug - type mechanical connection joint includes a cylindrical encapsulation body 1, a central through - hole 2, and an external - thread connection part 3 on the outer diameter of the encapsulation body 1. The encapsulation body 1 is thread - connected to the lower sleeve through the external - thread connection part 3. A connection groove 4 is provided at the bottom of the cylindrical encapsulation body 1, and a lower stop 41 is provided along the bottom of the encapsulation body 1 below the connection groove 4; the opening diameter of the lower stop 41 is smaller than the inner diameter of the connection groove 4. The connection groove 4 is a rectangular inner groove. An inner conical surface 5 is provided between the central through - hole 2 and the connection groove 4, the diameter of the upper edge of the connection groove 4 is larger than the diameter of the bottom of the inner conical surface 5, and an annular upper stop 42 is formed at the junction of the upper edge of the connection groove 4 and the inner conical surface 5. A chamfer is provided on the outside of the lower stop 41. Embodiment

[0029] As Figure 5 As shown in the figure, a lower sleeve encapsulation device for a plug - type mechanical connection joint includes a cylindrical encapsulation body 1, a central through - hole 2, and an external - thread connection part 3 on the outer diameter of the encapsulation body 1. The encapsulation body 1 is thread - connected to the lower sleeve through the external - thread connection part 3. A connection groove 4 is provided at the bottom of the cylindrical encapsulation body 1, and a lower stop 41 is provided along the bottom of the encapsulation body 1 below the connection groove 4; the opening diameter of the lower stop 41 is smaller than the inner diameter of the connection groove 4. The connection groove 4 is an arc - shaped inner groove. An inner conical surface 5 is provided between the central through - hole 2 and the connection groove 4, the diameter of the upper edge of the connection groove 4 is larger than the diameter of the bottom of the inner conical surface 5, and an annular upper stop 42 is formed at the junction of the upper edge of the connection groove 4 and the inner conical surface 5. A chamfer is provided on the outside of the lower stop 41. Embodiment

[0030] As Figure 6As shown, a lower sleeve encapsulation device for a bolt-type mechanical connection joint includes a cylindrical encapsulation body 1, a central through-hole 2, and an external thread connection portion 3 on the outer diameter of the encapsulation body 1. The encapsulation body 1 is threadedly connected to the lower sleeve through the external thread connection portion 3. A connection groove 4 is provided at the bottom of the cylindrical encapsulation body 1, and a lower stop 41 is provided along the bottom of the encapsulation body 1 below the connection groove 4; the opening diameter of the lower stop 41 is smaller than the inner diameter of the connection groove 4. The connection groove 4 is an arc-shaped inner groove. An inner conical surface 5 is provided between the central through-hole 2 and the connection groove 4. The diameter of the upper edge of the connection groove 4 is larger than the diameter of the bottom of the inner conical surface 5, and an annular upper stop 42 is formed at the junction of the upper edge of the connection groove 4 and the inner conical surface 5. A chamfer is provided on the outside of the lower stop 41.

[0031] In the description of the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method part.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lower sleeve packaging device for a plug-type mechanical connection joint, comprising a cylindrical packaging body (1), a central through hole (2) and an external threaded connection portion (3) of the outer diameter of the packaging body (1), wherein the packaging body (1) is threadedly connected to the lower sleeve via the external threaded connection portion (3), and characterized in that: A connecting groove (4) is provided at the bottom of the cylindrical packaging body (1), and a lower stop (41) is provided below the connecting groove (4) along the bottom of the packaging body (1); the opening diameter of the lower stop (41) is smaller than the inner diameter of the connecting groove (4).

2. The lower sleeve packaging device of the plug-type mechanical connection joint according to claim 1, characterized in that: The connecting groove (4) is a rectangular inner groove.

3. The lower sleeve packaging device of the plug-type mechanical connection joint according to claim 2, characterized in that: The connecting groove (4) is an arc-shaped inner groove.

4. The lower sleeve packaging device of the plug-type mechanical connection joint according to claim 2 or 3, characterized in that: An inner conical surface (5) is provided between the central through hole (2) and the connecting groove (4), and the diameter of the upper edge of the connecting groove (4) is equal to the diameter of the bottom of the inner conical surface (5).

5. The lower sleeve packaging device of the plug-type mechanical connection joint according to claim 2 or 3, characterized in that: An inner conical surface (5) is provided between the central through hole (2) and the connecting groove (4); the diameter of the upper edge of the connecting groove (4) is greater than the bottom diameter of the inner conical surface (5); and a circular upper stop (42) is formed at the junction of the upper edge of the connecting groove (4) and the inner conical surface (5).

6. The lower sleeve packaging device of the plug-type mechanical connection joint according to claim 1, characterized in that: The outer side of the lower stop (41) is provided with a chamfer.

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