Connecting piece for internally expanded groove pipe

Abstract

This invention discloses a connector for use in an internally expanded grooved tube, comprising a fastening part extending from the positive opening of the internally expanded groove into the internally expanded groove, and a connecting part extending out of the positive opening of the internally expanded groove. After the connecting part drives the fastening part to rotate by an angle, the internally expanded groove forms a vertical limit on the fastening part. The fastening part and / or the connecting part are provided with a rotation positioning component for driving the fastening part to fasten the internally expanded groove after the rotation angle and for positioning the fastening part vertically and in the rotation direction. This connector has the advantages of simple and ingenious structure, convenient installation, and the ability to achieve positioning and anti-rotation.

Description

[0001] (This application is a divisional application of "Connector Applied to Internally Expanded Grooved Tube", the original application was filed on December 7, 2018, application number 201811498056.9, and the invention title is "Connector Applied to Internally Expanded Grooved Tube".) Technical Field

[0002] This invention relates primarily to the field of building engineering, and more particularly to a connector for use in internally expanded grooved tubes. Background Technology

[0003] Currently, glass curtain walls are commonly used in building facades. A curtain wall consists of a frame, curtain wall panels, pressure plates, and bolts. The curtain wall panels are supported by the frame, and the pressure plates are pressed onto the curtain wall panels. The pressure plates are connected to the frame via bolts, and tightening the bolts causes the pressure plates to press firmly against each other. In this curtain wall structure, the bolts are directly threaded onto the frame, which is equivalent to the bolts being directly threaded onto the load-bearing surface of the frame. This means that the tightening force is concentrated at the threaded connection point, creating a point of stress. On the one hand, this can easily cause stress concentration and damage to the frame; on the other hand, the bolts at this point are also prone to significant shear force and breakage.

[0004] To address this issue, existing technologies employ a keel structure with an inwardly expanding groove. Bolt heads are secured within this groove before connecting to the pressure plate, increasing the contact area between the bolt and the keel, preventing the bolt from directly threading onto the keel. However, this structure, while increasing the contact area, also increases the heat conduction area, failing to achieve adequate heat insulation and fire resistance. Furthermore, installation requires sliding the connector from the keel end into the groove, which is extremely inconvenient for long keels. Additionally, the connector's ability to slide within the groove implies a gap between it and the groove's sidewall, allowing for rotation and potentially causing connection failure. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a connector for internally expanded grooved tubes that is simple and ingenious in structure, easy to install, and can achieve positioning and anti-rotation.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A connector for use in an inner-expanding groove tube includes a fastening part extending from the positive opening of the inner-expanding groove into the inner-expanding groove of the inner-expanding groove tube. The fastening part is provided with a connecting part extending out of the positive opening of the inner-expanding groove. After the connecting part drives the fastening part to rotate by an angle, the inner-expanding groove forms a vertical limit on the fastening part. The fastening part and / or the connecting part are provided with a rotation positioning part for driving the fastening part after the rotation angle to fasten the inner-expanding groove and positioning the fastening part in the vertical and rotational directions.

[0008] As a further improvement to the above technical solution:

[0009] The rotation positioning component includes an anti-rotation platform at the top of the fastening part and an elastic element at the bottom of the fastening part. When the fastening part extends into the positive groove of the inner expansion groove, the elastic element is compressed. After the fastening part rotates by an angle, the elastic element rebounds, causing the anti-rotation platform at the top of the fastening part to extend into the positive groove of the inner expansion groove to form anti-rotation and vertical positioning.

[0010] The elastic element includes a spring and a positioning post. The bottom of the fastening part has a sleeve hole, the spring is disposed in the sleeve hole, one end of the positioning post extends into the sleeve hole and connects with the spring, and the other end is supported on the bottom of the inner expansion groove.

[0011] The rotation positioning component includes an anti-rotation sleeve platform, which is provided with a vertical positioning buckle. The anti-rotation sleeve platform is sleeved with the connecting part and forms an anti-rotation positioning with the positive groove of the inner expansion groove. The vertical positioning buckle is fastened with the fastening part or the connecting part to form a vertical positioning.

[0012] The anti-rotation platform has an anti-rotation part on its side that contacts the inner expansion groove tubes on both sides of the inner expansion groove's positive slot.

[0013] The anti-rotation sleeve platform is provided with a socket hole, the socket hole is provided with at least a pair of first flat surfaces arranged opposite each other, the connecting part is provided with a pair of second flat surfaces that cooperate with the first flat surfaces, and the vertical positioning buckle feet are provided oppositely on the outside of the anti-rotation sleeve platform and are fastened to the buckle part.

[0014] The fastening part is provided with a fastening platform, and the vertical positioning fastening foot is fastened to the fastening platform.

[0015] The anti-rotation sleeve platform has a socket with at least one pair of oppositely arranged undercuts, and the connecting part has a pair of grooves that cooperate with the undercuts.

[0016] The anti-rotation platform has an anti-rotation plate on the side adjacent to the anti-rotation part that is in close contact with the fastening part.

[0017] The rotation positioning component includes an arc-shaped tightening part disposed on the side of the fastening part and tightly attached to the side wall of the inner expansion groove after rotation angle; the rotation positioning component includes an anti-rotation spring piece disposed on the side of the arc-shaped tightening part for preventing rotation.

[0018] The rotation positioning component includes an arc-shaped tightening part disposed on the side of the fastening part and tightly attached to the side wall of the inner expansion groove after rotation angle; the rotation positioning component includes an anti-rotation spring piece disposed on the top of the fastening part for preventing rotation.

[0019] The rotation positioning component is set as an elastic plate connected to the connecting part. When the connecting part is pressed down and rotated, the elastic plate generates elastic deformation. After rotation, it rebounds and snaps into the positive groove of the inner expansion groove to form vertical and rotational positioning of the fastening part.

[0020] The elastic plate is fitted onto the connecting part and rotates with the connecting part.

[0021] The elastic plate has a fitting hole, and the fitting hole has a locking platform along its inner edge. The connecting part has a locking groove, and the elastic plate is fitted onto the connecting part with its locking platform and locking groove engaging.

[0022] The rotation positioning component is set as an elastic plate connected to the connecting part. When the connecting part is pressed down and rotated, the elastic plate generates elastic deformation. After rotation, it rebounds and drives the fastening part to move upward through the connecting part and fit tightly against the inner expansion groove to form vertical and rotational positioning.

[0023] The elastic plate is fitted onto the connecting part and does not rotate with the connecting part.

[0024] The elastic plate has a fitting hole, and the connecting part has a pressure table. The elastic plate is fitted onto the connecting part and the pressure table presses against the edge of the fitting hole.

[0025] After the connecting part drives the fastening part to rotate 90°, the inner expansion groove forms a vertical limit on the fastening part.

[0026] The fastening part includes a metal buckle and a heat insulation component disposed on the metal buckle. The connecting part is connected to the metal buckle, and the connecting part drives the heat insulation component to fasten with the inner expansion groove through the metal buckle.

[0027] The heat insulation component contacts the side wall of the inner expansion groove, and the metal buckle forms a gap with the inner expansion groove.

[0028] The connecting part and the metal buckle are configured as an integrally formed T-shaped screw, and the heat insulation component is wrapped around the outside of the metal buckle.

[0029] The metal buckle head has a locking protrusion, and the heat insulation component has a locking hole, with the locking protrusion and the locking hole engaging to engage.

[0030] The connecting part and the metal buckle are configured as an integrally formed T-shaped threaded sleeve, and the heat insulation component is set on the top of the metal buckle.

[0031] Compared with the prior art, the advantages of the present invention are as follows:

[0032] The connector of the present invention, applied to an inner-expanding groove tube, includes a fastening part extending from the positive opening of the inner-expanding groove of the inner-expanding groove tube into the inner-expanding groove. The fastening part is provided with a connecting part extending out of the positive opening of the inner-expanding groove. After the connecting part drives the fastening part to rotate by an angle, the inner-expanding groove forms a vertical limit on the fastening part. The fastening part and / or the connecting part are provided with a rotation positioning member for driving the fastening part after the rotation angle to fasten the inner-expanding groove and positioning the fastening part in the vertical and rotational directions. This connector is used in curtain wall systems. During installation, the fastening part is first extended from the positive slot of the inner expansion groove of the inner expansion groove tube into the inner expansion groove. The fastening part is then driven to rotate at a certain angle until the inner expansion groove forms a vertical limit on the fastening part (the fastening part cannot be dislodged from the inner expansion groove). After rotation, the fastening part is positioned vertically and in the direction of rotation using the rotation positioning component. Then, the curtain wall panel is placed on the inner expansion groove tube, and the pressure plate is pressed onto the curtain wall panel. Finally, the locking component is used to connect with the connector. When the locking component is locked, it drives the pressure plate to press the curtain wall panel, and at the same time, the connector drives the fastening part to fasten the inner expansion groove. Compared to traditional structures, this connector utilizes the upward pulling force generated by the connecting part. This pulling force causes the fastening part to clamp the inner expansion groove. During installation, the fastening part can be inserted directly into the inner expansion groove through the positive slot, greatly improving the ease of installation. Furthermore, the positioning part provides vertical and rotational positioning for the fastening part, thus achieving an initial positioning effect. During the locking process, no external force is required to keep the fastening part in the positioning state, further enhancing the ease of installation. Its structure is simple and its design is ingenious. Attached Figure Description

[0033] Figure 1 This is a usage state diagram of Embodiment 1 of the present invention.

[0034] Figure 2 This is a usage state diagram of Embodiment 1 of the present invention (without locking parts installed).

[0035] Figure 3 This is a three-dimensional exploded view of the connector in Embodiment 1 of the present invention.

[0036] Figure 4 This is a usage state diagram of Embodiment 2 of the present invention.

[0037] Figure 5 This is a three-dimensional exploded view of the connector in Embodiment 2 of the present invention.

[0038] Figure 6 This is a usage state diagram of Embodiment 3 of the present invention.

[0039] Figure 7 This is a three-dimensional exploded view of the connector in Embodiment 3 of the present invention.

[0040] Figure 8 This is a usage state diagram of Embodiment 4 of the present invention.

[0041] Figure 9 This is a top view of the structure in the rotated state of Embodiment 4 of the present invention.

[0042] Figure 10 This is a top view of the springback structure in Embodiment 4 of the present invention.

[0043] Figure 11 This is a usage state diagram of Embodiment 5 of the present invention.

[0044] Figure 12 This is a top view of the structure in the rotated state of Embodiment 5 of the present invention.

[0045] Figure 13 This is a top view of the springback structure in Embodiment 5 of the present invention.

[0046] Figure 14 This is a usage state diagram of Embodiment 6 of the present invention.

[0047] Figure 15 This is an exploded perspective view of the connector in Embodiment 6 of the present invention.

[0048] Figure 16 This is a usage state diagram of Embodiment 7 of the present invention.

[0049] Figure 17 This is a three-dimensional exploded view of the connector in Embodiment 7 of the present invention.

[0050] The labels in the diagram represent:

[0051] 1. Inner-expanding groove tube; 11. Inner-expanding groove; 2. Fastening part; 21. Sleeve hole; 22. Fastening platform; 23. Metal buckle; 231. Locking protrusion; 24. Thermal insulation component; 241. Locking hole; 3. Connecting part; 31. Second flat surface; 32. Fastening groove; 33. Locking groove; 34. Pressing platform; 4. Rotation positioning component; 41. Anti-rotation platform; 42. Elastic component; 421. Spring; 422. Positioning post; 43. Anti-rotation sleeve platform; 431. Sleeve hole; 4311. First flat surface; 4312. Inverted buckle; 432. Anti-rotation part; 44. Vertical positioning buckle foot; 45. Anti-rotation plate; 46. Arc-shaped tightening part; 47. Anti-rotation spring; 48. Fitting hole; 481. Locking platform; 5. Curtain wall panel; 6. Pressing plate; 7. Locking component. Detailed Implementation

[0052] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Example 1:

[0054] like Figures 1 to 3As shown, the first embodiment of the present invention is applied to a connector for an inner-expanding groove tube. The connector includes a fastening part 2 extending from the positive groove opening of the inner-expanding groove 11 of the inner-expanding groove tube 1 into the inner-expanding groove 11. The fastening part 2 is provided with a connecting part 3 extending out of the positive groove opening of the inner-expanding groove 11. After the connecting part 3 drives the fastening part 2 to rotate by an angle, the inner-expanding groove 11 forms a vertical limit on the fastening part 2. The fastening part 2 and / or the connecting part 3 are provided with a rotation positioning member 4 for driving the fastening part 2 after the rotation angle to fasten the inner-expanding groove 11 and for positioning the fastening part 2 in the vertical and rotational directions. This connector is used in a curtain wall system. During installation, the fastening part 2 is first extended from the positive slot of the inner expansion groove 11 of the inner expansion groove tube 1 into the inner expansion groove 11. The connecting part 3 drives the fastening part 2 to rotate a certain angle until the inner expansion groove 11 forms a vertical limit on the fastening part 2 (the fastening part 2 cannot be dislodged from the inner expansion groove 11). After rotation, the positioning part 4 is used to position the fastening part 2 vertically and in the rotation direction. Then, the curtain wall panel 5 is supported on the inner expansion groove tube 1, and the pressure plate 6 is pressed on the curtain wall panel 5. Finally, the locking part 7 is used to connect with the connecting part 3. When the locking part 7 is locked, it drives the pressure plate 6 to press the curtain wall panel 5, and at the same time, the connecting part 3 drives the fastening part 2 to fasten the inner expansion groove 11. Compared to traditional structures, this connector utilizes the connecting part 3 to generate an upward pulling force, which drives the fastening part 2 to fasten the inner expansion groove 11. During installation, the fastening part 2 can be inserted directly into the inner expansion groove 11 through the positive slot, greatly improving the ease of installation. Meanwhile, the rotation positioning part 4 positions the fastening part 2 vertically and in the rotation direction, thus achieving an initial positioning effect. During the locking process, no external force is needed to keep the fastening part 2 in the positioning state, greatly improving the ease of installation. Its structure is simple and its design is ingenious.

[0055] In this embodiment, the rotation positioning component 4 includes an anti-rotation platform 41 located at the top of the fastening part 2 and an elastic component 42 located at the bottom of the fastening part 2. When the fastening part 2 extends into the inner expansion groove 11 through the positive slot, the elastic component 42 is compressed. After the fastening part 2 rotates, the elastic component 42 rebounds, causing the anti-rotation platform 41 at the top of the fastening part 2 to extend into the positive slot of the inner expansion groove 11, forming anti-rotation and vertical positioning. In this structure, when the rotation is pressed down, the elastic component 42 is compressed, which facilitates the fastening part 2 to extend into the inner expansion groove 11 through the positive slot. When the rotation ends and the pressure is released, the elastic component 42 rebounds, causing the fastening part 2 to buckle against the inner expansion groove 11 in the opposite direction, forming vertical positioning. At the same time, the anti-rotation platform 41 extends into the positive slot of the inner expansion groove 11 and fits tightly against it, forming anti-rotation positioning, thus forming the initial positioning effect. During the locking process, no external force is needed to keep the fastening part 2 in a positioned state, which greatly improves the convenience of installation. Its structure is simple and ingeniously designed.

[0056] In this embodiment, the elastic element 42 includes a spring 421 and a positioning post 422. The bottom of the fastening part 2 has a sleeve hole 21, and the spring 421 is disposed in the sleeve hole 21. One end of the positioning post 422 extends into the sleeve hole 21 and connects with the spring 421, while the other end is supported on the bottom of the inner expansion groove 11. In this structure, during the pressing process, the positioning post 422 is driven by force to compress the spring 421, and the fastening part 2 will extend into the inner expansion groove 11. When it is released after rotation, the spring 421 restores its deformation, causing the fastening part 2 to buckle against the inner expansion groove 11 to form a vertical positioning. At the same time, the anti-rotation platform 41 will also extend into the positive groove opening of the inner expansion groove 11 to form an anti-rotation mechanism.

[0057] In this embodiment, after the connecting part 3 drives the fastening part 2 to rotate 90°, the inner expansion groove 11 forms a vertical limit on the fastening part 2. In this structure, the 90° rotation enables the fastening part 2 and the inner expansion groove 11 to form the largest fastening area, which improves the stability and reliability of the fastening.

[0058] In this embodiment, the fastening part 2 includes a metal buckle 23 and a heat insulation member 24 disposed on the metal buckle 23. The connecting part 3 is connected to the metal buckle 23, and the connecting part 3 drives the heat insulation member 24 to fasten to the inner expansion groove 11 through the metal buckle 23. In this structure, the metal buckle 23 provides the main fastening force to ensure the fastening strength, while the heat insulation member 24, on the one hand, breaks the heat transfer and fire conduction path between the inner expansion groove 11 and the connecting part 3, forming a heat insulation and fireproof layer, which plays a good role in heat insulation and fireproof performance.

[0059] In this embodiment, the heat insulation component 24 contacts the side wall of the inner expansion groove 11, and the metal buckle 23 forms a gap with the inner expansion groove 11. In this structure, the heat insulation component 24 serves to disconnect, that is, the heat insulation component 24 contacts the inner expansion groove 11 and forms a gap with the metal buckle 23, which is equivalent to forcibly disconnecting the heat transfer and ignition path between the metal buckle 23 and the inner expansion groove 11, that is, forcibly disconnecting the heat transfer and ignition path between the inner expansion groove 11 and the connecting part 3. Its structure is simple and ingenious.

[0060] In this embodiment, the connecting part 3 and the metal buckle 23 are configured as an integrally formed T-shaped screw, and the heat insulation element 24 covers the outside of the metal buckle 23. In this structure, the heat insulation element 24 is sleeved on the connecting part 3 and covers the outside of the metal buckle 23. The heat insulation element 24 is fastened in the inner expansion groove 11. When locked, the locking element 7 (nut) drives the pressure plate 6 to press the curtain wall panel 5, and at the same time, the connecting part 3 drives the heat insulation element 24 to fasten the inner expansion groove 11 through the metal buckle 23. Its structure is simple and reliable.

[0061] In this embodiment, the metal buckle 23 is provided with a locking protrusion 231, and the heat insulation component 24 is provided with a locking hole 241. The locking protrusion 231 and the locking hole 241 engage to lock together. The engagement of the locking protrusion 231 and the locking hole 241 enables the rapid positioning and installation of the heat insulation component 24 and the metal buckle 23.

[0062] Example 2:

[0063] like Figure 4 and Figure 5 As shown, this invention is applied to a second embodiment of a connector for an internally expanded grooved tube. This connector is basically the same as that in embodiment 1, except that: in this embodiment, the rotation positioning component 4 includes an anti-rotation platform 43, on which a vertical positioning latch 44 is provided. The anti-rotation platform 43 is sleeved with the connecting part 3 and forms an anti-rotation positioning with the positive groove opening of the internally expanded groove 11. The vertical positioning latch 44 is fastened with the fastening part 2 or the connecting part 3 to form a vertical positioning. In this structure, the rotation positioning component 4 is installed later, that is, after the fastening part 2 rotates, the anti-rotation platform 43 is sleeved with the connecting part 3. The anti-rotation platform 43 restricts the rotation of the connecting part 3, while the vertical positioning latch 44 is fastened with the fastening part 2 to form a vertical positioning. This also makes it unnecessary to use external force to position the fastening part 2 during the locking process, greatly improving the ease of installation during the locking process.

[0064] In this embodiment, the anti-rotation platform 43 is provided with an anti-rotation part 432 on its side, which contacts the inner expansion groove tubes 1 on both sides of the positive groove opening of the inner expansion groove 11. In this structure, the anti-rotation part 432 contacts the inner expansion groove tubes 1 on both sides of the positive groove opening to prevent rotation, thereby preventing the connecting part 3 from rotating.

[0065] In this embodiment, the anti-rotation platform 43 is provided with a socket hole 431, and the socket hole 431 is provided with at least a pair of first flat surfaces 4311 arranged opposite each other. The connecting part 3 is provided with a pair of second flat surfaces 31 that cooperate with the first flat surfaces 4311. Vertical positioning feet 44 are arranged oppositely on the outside of the anti-rotation platform 43 and are fastened to the fastening part 2. In this structure, the vertical positioning feet 44 are fastened to the fastening part 2 to form vertical positioning, and the first flat surfaces 4311 and the second flat surfaces 31 cooperate to form anti-rotation positioning. Its structure is simple and reliable.

[0066] In this embodiment, the fastening part 2 is provided with a fastening platform 22, and the vertical positioning fastening feet 44 are fastened to the fastening platform 22. During installation, the vertical positioning fastening feet 44 are squeezed into the lower part of the fastening part 2 from both sides to form a fastening fixation, which is ingenious.

[0067] In this embodiment, the connecting part 3 and the metal buckle 23 are configured as an integrally formed T-shaped threaded sleeve, and the heat insulation element 24 is disposed on the top of the metal buckle 23. In this structure, the heat insulation element 24 is sleeved on the connecting part 3 and located on the top surface of the metal buckle 23. The heat insulation element 24 is fastened in the inner expansion groove 11. When locked, the locking element 7 (screw) drives the pressure plate 6 to press the curtain wall panel 5, and at the same time, the connecting part 3 drives the heat insulation element 24 to fasten the inner expansion groove 11 through the metal buckle 23. Its structure is simple and reliable.

[0068] Example 3:

[0069] like Figure 6 and Figure 7 As shown, this is the third embodiment of the present invention applied to the connector of the inner expansion groove tube. This connector is basically the same as that of embodiment 2, except that: in this embodiment, the anti-rotation platform 43 has a sleeve hole 431 with at least a pair of oppositely arranged buckles 4312, and the connecting part 3 has a pair of buckle grooves 32 that cooperate with the buckles 4312. During installation, when the fastening part 2 rotates to the point where the inner expansion groove 11 forms a vertical limit on the fastening part 2, the rotation positioning part 4 can be installed. The buckles 4312 of the anti-rotation platform 43 are squeezed into the buckle grooves 32 to form a reverse buckle, and the anti-rotation part 432 forms contact positioning with the inner expansion groove tube 1 on both sides of the positive groove. Therefore, the fastening part 2 is positioned in the vertical direction and rotation, so that no external force is needed to position the fastening part 2 during the locking process, which greatly improves the ease of installation during the locking process.

[0070] In this embodiment, the anti-rotation platform 43 is provided with an anti-rotation plate 45 on the side adjacent to the anti-rotation part 432, which is in close contact with the fastening part 2. The anti-rotation plate 45 further prevents the fastening part 2 from rotating, and further improves the anti-rotation effect.

[0071] Example 4:

[0072] like Figures 8 to 10 As shown, this invention is applied to a fourth embodiment of a connector for an inner-expanding groove tube. This connector is basically the same as that in embodiment 1, except that: in this embodiment, the rotation positioning component 4 includes an arc-shaped tightening part 46 disposed on the side of the fastening part 2 and tightly abutting the side wall of the inner-expanding groove 11 after rotation. The rotation positioning component 4 also includes an anti-rotation spring piece 47 disposed on the side of the arc-shaped tightening part 46 for preventing rotation. In this structure, during rotation, the arc-shaped tightening part 46 will press tightly against the side wall of the inner-expanding groove 11 to form a pre-tightening. After the anti-rotation spring piece 47 rebounds, it will tightly abut against the side wall of the inner-expanding groove 11. The combined effect of the two achieves vertical and rotational positioning.

[0073] Example 5:

[0074] like Figures 11 to 13 As shown, this invention is applied to a fifth embodiment of a connector for an inner-expanding groove tube. This connector is basically the same as that in embodiment 4, except that: in this embodiment, the rotation positioning component 4 includes an arc-shaped tightening part 46 disposed on the side of the fastening part 2 and tightly attached to the side wall of the inner-expanding groove 11 after rotation. The rotation positioning component 4 also includes an anti-rotation spring piece 47 disposed on the top of the fastening part 2 for preventing rotation. In this structure, during rotation, the arc-shaped tightening part 46 will press tightly against the side wall of the inner-expanding groove 11 to form a pre-tightening. After the anti-rotation spring piece 47 rebounds, it will tightly attach to both sides of the positive groove opening of the inner-expanding groove 11. The combined effect of the two achieves vertical and rotational positioning.

[0075] Example 6:

[0076] like Figure 14 and Figure 15 As shown, the sixth embodiment of the present invention is applied to the connector of the inner expansion groove tube. The connector is basically the same as that in embodiment 1, except that: in this embodiment, the rotation positioning member 4 is set as an elastic plate connected to the connecting part 3. When the connecting part 3 is pressed down and rotated, the elastic plate generates elastic deformation. After rotation, it rebounds and snaps into the positive groove of the inner expansion groove 11 to form vertical and rotational positioning of the fastening part 2. In this structure, the elastic plate is pressed to generate a force that allows the connecting part 3 to drive the fastening part 2 to extend from the positive slot into the inner expansion groove 11 and rotate. When the inner expansion groove 11 forms a vertical limit on the fastening part 2, the downward pressure is released, and the elastic plate rebounds and engages with the positive slot of the inner expansion groove 11, thereby achieving a positioning and anti-rotation effect. Furthermore, the locking part 7 generates a driving force that drives the connecting part 3 to generate an upward pulling force. The pulling force will drive the fastening part 2 to fasten the inner expansion groove 11 to complete the final locking. During installation, the fastening part 2 can be directly installed from the positive slot of the inner expansion groove 11, which greatly improves the convenience of installation. After rotation, the elastic plate rebounds and drives the fastening part 2 to fit tightly against the inner expansion groove 11, achieving the positioning and anti-rotation function. This means that no external force is needed to keep the fastening part 2 in a positioned state during the locking process, which greatly improves the convenience of installation. Its structure is simple and ingeniously designed.

[0077] In this embodiment, the elastic plate is fitted onto the connecting part 3 and rotates with the connecting part 3. In this structure, the elastic plate rotates with the connecting part 3, that is, the edge of the elastic plate is deformed by pressure and rotates with the connecting part 3, and finally it is snapped into the inner expansion groove 11.

[0078] In this embodiment, the elastic plate has a fitting hole 48, and a locking platform 481 is provided on the inner edge of the fitting hole 48. The connecting part 3 has a locking groove 33. The elastic plate is fitted onto the connecting part 3, and its locking platform 481 and locking groove 33 engage and lock in place. In this structure, the engagement of the locking platform 481 and locking groove 33 achieves a fixed relationship between the elastic plate and the connecting part 3, so that the elastic plate can both rotate with the connecting part 3 and deform under its downward pressure. Its structure is simple and ingeniously designed.

[0079] Example 7:

[0080] like Figure 16 and Figure 17As shown, this invention is applied to a seventh embodiment of a connector for an inner-expanding grooved tube. This connector is basically the same as that in embodiment 6, except that: in this embodiment, the rotation positioning member 4 is set as an elastic plate connected to the connecting part 3. When the connecting part 3 is pressed down and rotated, the elastic plate undergoes elastic deformation. After rotation, it rebounds and drives the fastening part 2 upward through the connecting part 3 to tightly adhere to the inner-expanding groove 11, forming a vertical and rotational positioning. The elastic plate is pressed to allow the connecting part 3 to drive the fastening part 2 to extend from the positive groove opening into the inner-expanding groove 11 for rotation. When the inner-expanding groove 11 forms a vertical limit on the fastening part 2, the downward pressure is released, and the elastic plate rebounds and drives the fastening part 2 upward through the connecting part 3 to tightly adhere to the inner-expanding groove 11, thereby achieving a positioning and anti-rotation effect. This eliminates the need for external force to keep the fastening part 2 in a positioned state during the locking process, greatly improving the ease of installation. Its structure is simple and its design is ingenious.

[0081] In this embodiment, the elastic plate is fitted onto the connecting part 3 and does not rotate with the connecting part 3. In this structure, the elastic plate can only be subjected to the downward pressure of the connecting part 3 and not to the rotational torque of the connecting part 3, thus achieving the effect of deformation under the downward pressure and rebound to drive the buckle.

[0082] In this embodiment, the elastic plate has a fitting hole 48, and the connecting part 3 has a pressure table 34. The elastic plate is fitted onto the connecting part 3, and the pressure table 34 presses against the edge of the fitting hole 48. In this structure, when the connecting part 3 is pressed down, its pressure table 34 presses against the edge of the fitting hole 48, thereby causing the elastic plate to deform. When it rebounds, the fitting hole 48 of the elastic plate acts in the opposite direction on the pressure table 34, causing the connecting part 3 to move the metal buckle 23 upward to achieve a reverse buckle.

[0083] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A connector for use in an internally expanded grooved tube, characterized in that: The device includes a fastening part (2) extending from the positive opening of the inner expansion groove (11) of the inner expansion groove tube (1) into the inner expansion groove (11). The fastening part (2) is provided with a connecting part (3) extending out of the positive opening of the inner expansion groove (11). After the connecting part (3) drives the fastening part (2) to rotate, the inner expansion groove (11) forms a vertical limit on the fastening part (2). The fastening part (2) and / or the connecting part (3) are provided with a rotation positioning member (4) for driving the fastening part (2) after the rotation angle to fasten the inner expansion groove (11) and for positioning the fastening part (2) vertically and in the rotation direction. The rotation positioning member (4) includes an anti-rotation platform (43). The anti-rotation platform (43) is provided with a vertical positioning buckle (44). The vertical positioning buckle (44) is sleeved with the connecting part (3) and forms an anti-rotation positioning with the positive groove of the inner expansion groove (11). The vertical positioning buckle (44) is fastened with the fastening part (2) or the connecting part (3) to form a vertical positioning. The side of the anti-rotation sleeve (43) is provided with an anti-rotation part (432) that contacts the inner expansion groove tube (1) on both sides of the positive groove of the inner expansion groove (11). The anti-rotation sleeve (43) is provided with a sleeve hole (431). The sleeve hole (431) is provided with at least one pair of first flat surfaces (4311) arranged opposite to each other. The connecting part (3) is provided with a pair of second flat surfaces (31) that cooperate with the first flat surfaces (4311). The vertical positioning buckle (44) is arranged opposite to each other outside the anti-rotation sleeve (43) and is fastened with the fastening part (2).

2. The connector for an internally expanded grooved tube according to claim 1, characterized in that: The fastening part (2) is provided with a fastening platform (22), and the vertical positioning fastening foot (44) is fastened to the fastening platform (22).

3. The connector for an internally expanded grooved tube according to claim 1, characterized in that: The anti-rotation platform (43) has a socket hole (431) with at least a pair of oppositely arranged buckles (4312) inside, and the connecting part (3) has a pair of buckle grooves (32) that cooperate with the buckles (4312).

4. The connector for an internally expanded grooved tube according to claim 3, characterized in that: The anti-rotation platform (43) has an anti-rotation plate (45) that is in close contact with the fastening part (2) on the side adjacent to the anti-rotation part (432).

5. The connector for an internally expanded grooved tube according to any one of claims 1 to 4, characterized in that: The connecting part (3) drives the fastening part (2) to rotate 90° and then the inner expansion groove (11) forms a vertical limit on the fastening part (2).

6. The connector for an internally expanded grooved tube according to claim 5, characterized in that: The fastening part (2) includes a metal buckle (23) and a heat insulation member (24) disposed on the metal buckle (23). The connecting part (3) is connected to the metal buckle (23). The connecting part (3) drives the heat insulation member (24) to fasten with the inner expansion groove (11) through the metal buckle (23).

7. The connector for an internally expanded grooved tube according to claim 6, characterized in that: The heat insulation element (24) contacts the side wall of the inner expansion groove (11), and the metal buckle (23) forms a gap with the inner expansion groove (11).

8. The connector for an internally expanded grooved tube according to claim 7, characterized in that: The connecting part (3) and the metal buckle (23) are configured as an integrally formed T-shaped screw, and the heat insulation element (24) covers the outside of the metal buckle (23).

9. The connector for an internally expanded grooved tube according to claim 6, characterized in that: The metal buckle (23) is provided with a locking protrusion (231), and the heat insulation component (24) is provided with a locking hole (241). The locking protrusion (231) and the locking hole (241) are engaged and locked together.

10. The connector for an internally expanded grooved tube according to claim 6, characterized in that: The connecting part (3) and the metal buckle (23) are configured as an integrally formed T-shaped threaded sleeve, and the heat insulation element (24) is provided on the top of the metal buckle (23).

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