Hidden T-shaped or vertical joint structure capable of being disassembled and assembled repeatedly

Abstract

The utility model relates to a hidden T-shaped or vertical joint structure capable of being repeatedly disassembled and assembled, which is characterized by comprising a to-be-connected pipe and a connected pipe which are vertically intersected, a shaft-shaped connecting piece is arranged in the end body of the to-be-connected pipe, at least one hole channel capable of being screwed with a fastening screw is arranged on the shaft-shaped connecting piece, and the hole channel is connected with the to-be-connected pipe. The hole channel penetrates through the radial direction of the shaft-shaped connecting piece so that the fastening screw can stretch in from the first end of the hole channel and can stretch out from the second end of the hole channel, the end, stretching out of the second end of the hole channel, of the fastening screw abuts against the inner wall face of a pipe to be connected, the shaft-shaped connecting piece is a pipe fitting with one end open and the other end closed, and a screw penetrates through the closed end. The pipe to be connected is provided with an outer reamed hole right opposite to the hole channel so that the fastening screw can penetrate into the hole channel conveniently, the connected pipe is provided with a through hole allowing the screw to penetrate through, and a nut connected and fastened with the screw is arranged in the connected pipe. According to the utility model, the convenience, firmness, reliability and attractiveness of pipe fitting connection can be greatly improved.

Description

Technical fields:

[0001] This utility model relates to a connecting component for pipe fittings, and in particular to a concealed T-shaped or vertical joint structure that can be repeatedly disassembled and assembled. Background technology:

[0002] In industrial products and daily necessities, axial connection or extension of pipe fittings with the same cross-section or irregular pipe fittings with different cross-sectional shapes is often involved. Typical examples include clothes racks connecting two round pipes with the same outer diameter and wall thickness.

[0003] For a secure and reliable pipe connection, welding is the best method. However, most environments do not have the conditions for welding. After welding, the weld seam needs to be ground for aesthetic purposes, which wastes energy and increases labor costs. The biggest problem is that it is inconvenient to disassemble after welding. For irregularly shaped pipes with different cross-sections, direct welding is neither convenient nor reliable.

[0004] Additionally, a Chinese patent, CN205478715U, titled "Vertical Connection Structure Between Metal Pipes," was found. This patent includes metal pipe A and metal pipe B. Metal pipe A is composed of two separate frame sections connected together. A short connecting pipe, corresponding to the shape of metal pipe B, is inserted into the end of metal pipe B that connects to metal pipe A. Several inner corners of the connecting pipe have nail grooves, through which screws pass to the side of metal pipe A that connects to metal pipe B and are connected to each nail groove. The opposite sides of the connecting pipe are connected to the corresponding opposite sides of metal pipe B using screws or rivets. This patent saves materials and labor, has an aesthetically pleasing appearance, and is widely applicable. However, its complex structure makes manufacturing difficult. Summary of the Invention:

[0005] In view of the above-mentioned problems, the purpose of this utility model is to provide a reusable and reassembleable concealed T-shaped or vertical connector structure. This reusable and reassembleable concealed T-shaped or vertical connector structure is reasonably designed and facilitates production and use.

[0006] This utility model is implemented using the following solution.

[0007] This utility model relates to a reusable, concealed T-shaped or vertical connector structure, characterized in that it comprises a pipe to be connected and a pipe to be connected arranged perpendicularly. A shaft-shaped connector is installed inside the end of the pipe to be connected. The shaft-shaped connector has at least one channel for screwing a fastening screw. The channel extends radially through the shaft-shaped connector, allowing the fastening screw to extend into the channel from a first end and extend out from a second end. The end of the fastening screw extending from the second end of the channel abuts against the inner wall of the pipe to be connected. The shaft-shaped connector is a pipe with one open end and one closed end, with a screw passing through the closed end. The pipe to be connected has an outwardly enlarged hole directly opposite the channel to facilitate the fastening screw's insertion into the channel. The pipe to be connected has a through hole for the screw to pass through, and a nut for fastening the screw is provided inside the pipe to be connected.

[0008] Preferably, the aforementioned shaft-shaped connector is a hollow rod body, with a threaded hole on one side wall of the hollow rod body, and a through hole on the opposite side wall of the threaded hole, allowing a fastening screw to pass through. The threaded hole and the through hole constitute the channel through the shaft-shaped connector.

[0009] Preferably, the aforementioned shaft-shaped connector is a hollow rod body, with identical threaded holes on both sides of the hollow rod body. The two threaded holes on the two side walls are coaxial and form the passage through the shaft-shaped connector.

[0010] Preferably, the aforementioned shaft-shaped connector has a plurality of sets of holes in the circumferential direction, and / or the shaft-shaped connector has a plurality of sets of holes in the axial direction.

[0011] Preferably, an arc-shaped piece is provided between the inner wall surface of the tube to be connected and the outer peripheral surface of the shaft-shaped connector. The end of the fastening screw extending from the second end of the channel abuts against the inner wall surface of the arc-shaped piece, and the outer peripheral surface of the arc-shaped piece is in contact with the inner wall surface of the outer tube.

[0012] Preferably, a sealing ring is provided between the outer peripheral surface of the arc-shaped piece and the inner wall surface of the outer pipe.

[0013] Preferably, the cross-sections of the pipe to be connected and the pipe being connected are circular, square, or elliptical.

[0014] Preferably, when the pipe to be connected is a round pipe, the end of the pipe to be connected is an arc shape that is in contact with the pipe to be connected.

[0015] Preferably, when the tube to be connected is a square tube, the end of the tube to be connected is a plane that is in contact with the tube to be connected.

[0016] Preferably, the connected tube and the tube to be connected are provided with a non-circular groove at the relative position of the contact surface, and a gasket matching its shape is provided in the non-circular groove.

[0017] This utility model greatly improves the convenience, firmness, reliability and aesthetics of pipe fitting connections by using a simple, low-cost, and standardized shaft-shaped connector and a special installation method that uses a concealed fixing method similar to internal expansion. It also overcomes the drawback of connecting pipe fittings with different cross-sections using flanges, which was impossible with any previous connection method. Attached image description:

[0018] The present invention will be further described below with reference to the accompanying drawings;

[0019] Figure 1 This is a cross-sectional view of one embodiment of the shaft-shaped connector;

[0020] Figure 2 This is a left view of an embodiment of a shaft-shaped connector;

[0021] Figure 3 This is a cross-sectional view of another embodiment of the shaft-shaped connector;

[0022] Figure 4 This is a cross-sectional view of another embodiment of the shaft-shaped connector;

[0023] Figure 5 This is a cross-sectional view of another embodiment of the shaft-shaped connector;

[0024] Figure 6 This is a cross-sectional view of another embodiment of the shaft-shaped connector;

[0025] Figure 7 This is a left view of an embodiment of a shaft-shaped connector;

[0026] Figure 8 This is a cross-sectional view of another embodiment of the shaft-shaped connector;

[0027] Figure 9 This is a cross-sectional view of one embodiment of the shaft-shaped connector;

[0028] Figure 10 This is a cross-sectional view of the first application embodiment of the shaft-shaped connector;

[0029] Figure 11 This is a cross-sectional view of the first application embodiment of the shaft connector, with the addition of an arc-shaped piece and a sealing ring;

[0030] Figure 12 yes Figure 11 Cross-sectional view;

[0031] Figure 13 This is a cross-sectional view of a second application embodiment of the shaft-shaped connector;

[0032] Figure 14 yes Figure 13 Cross-sectional view;

[0033] Figure 15 This is a cross-sectional view of the first application embodiment of the shaft connector in an external pipe with different cross-sections;

[0034] Figure 16 yes Figure 15 Cross-sectional view;

[0035] Figure 17 This is a cross-sectional view of a second application embodiment of the shaft-shaped connector in an external pipe with different cross-sections;

[0036] Figure 18 yes Figure 17 A three-dimensional schematic diagram of the takeover by Chinese and foreign entities;

[0037] Figure 19 This is a cross-sectional view of a third application embodiment of the shaft-shaped connector;

[0038] Figure 20 This is a cross-sectional view of the fourth application embodiment of the shaft connector (for the handrail connecting hole axis and the shaft connector axis being inclined).

[0039] Figure 21 This is a cross-sectional view of the fourth application embodiment of the shaft connector (for handrail connecting hole axis being perpendicular to shaft connector axis).

[0040] Figure 22 This is a cross-sectional view of the fifth application embodiment of the shaft connector;

[0041] Figure 23 This is a cross-sectional view of the sixth application embodiment of the shaft connector (for an outer tube with a circular cross-section).

[0042] Figure 24 This is a cross-sectional view of the sixth application embodiment of the shaft connector (for an outer tube with a rectangular cross-section).

[0043] Figure 25 This is a cross-sectional view of the sixth application embodiment of the shaft connector (with multiple holes around the circumference);

[0044] Figure 26 This is a cross-sectional view of the sixth application embodiment of the shaft connector (for connection with the component to be installed);

[0045] Figure 27 This is a perspective view of the sixth application embodiment of the shaft connector (with multiple holes around the circumference);

[0046] Figure 28 This is a perspective view of one embodiment of a shaft-shaped connector (with multiple channels in the circumference and axial direction);

[0047] Figure 29 yes Figure 28A perspective view of an application example of a shaft-shaped connector (with multiple channels in the circumference and axial direction);

[0048] Figure 30 This is a cross-sectional view of the seventh application embodiment of the shaft connector (for a circular tube being connected).

[0049] Figure 31 This is a cross-sectional view of the seventh application embodiment of the shaft connector (for a square tube being connected).

[0050] Figure 32 yes Figure 31 Cross-sectional view;

[0051] Figure 33 This is a cross-sectional view of one application scenario of the sixth application embodiment of the shaft connector. Detailed implementation method:

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

[0053] The concealed connector structure includes a shaft-shaped connector 1 and at least one hole 2 on the shaft-shaped connector for threading a fastening screw 3 (the hole may be threaded along its entire length or only partially threaded). The shaft-shaped connector has one, two, three, or more sets of holes in its circumferential direction, and / or the shaft-shaped connector has one, two, three, or more sets of holes in its axial direction; that is, the shaft-shaped connector has one, two, three, or more sets of holes in its circumferential direction (e.g., ...). Figure 9 , 23 As shown in Figures 24 and 25, two or more sets are provided around the circumference to increase the strength of the fastening, and the shaft-shaped connector has one, two, three or more sets of channels in the axial direction (such as...). Figure 3 , 5 As shown in 10, 11, 28, 29, etc., two or more sets are provided axially to increase the strength of the fastening; or, the shaft-shaped connector has one, two, three or more sets of channels in the circumferential direction, or the shaft-shaped connector has one, two, three or more sets of channels in the axial direction.

[0054] The centerline of the channel and the centerline of the shaft-shaped connector can be set perpendicular to each other (e.g.) Figure 1 , 3 (As shown in Figures 4, 5, etc.) or it can be set at an angle (i.e., the centerline of the channel and the centerline of the shaft-shaped connector can form an angle of 60-90 degrees). At the same time, the centerline of the channel and the centerline of the shaft-shaped connector can intersect or not intersect.

[0055] The shaft-shaped connector has the same cross-section along its entire length, and the cross-section is either circular, square, elliptical, or other shapes; or the shaft-shaped connector has two or more different cross-sections or dimensions along its entire length (to match the shapes and dimensions of different external cross-sections), and the cross-section is either circular, square, elliptical, or other shapes, i.e., a stepped shape with a variable cross-section along its length.

[0056] The channel allows the fastening screw 3, which is threaded to it, to extend from the first end 201 of the channel 2 and to extend from the second end 202 of the channel (i.e., the fastening screw can extend from the second end 202 of the channel after being screwed into it), meaning that the channel can be threaded along its entire length (e.g., ...). Figure 8 As shown), or a partial section is threaded (such as...). Figure 1 , 3 (as shown in Figures 4, 5, etc.)

[0057] The fastening screw 3 is a commercially available part with threads on its outer circumference and an internal hexagon countersunk hole or through hole on its end face. The screwing depth between the fastening screw 3 and the channel 2, as well as the length of the second end 202 extending out of the channel, can be adjusted with the help of an internal hexagon wrench.

[0058] One specific embodiment (such as) Figure 1 , 2 As shown in Figure 3), for the shaft-shaped connector 1 which is a hollow rod (i.e., a tube with a certain wall thickness), a threaded hole 101 is provided on one side wall of the hollow rod, and a through hole 102 is provided on the wall opposite to the threaded hole, which allows the fastening screw to pass through (i.e., the through hole 102 can be slightly larger than the diameter of the fastening screw). The threaded hole and the through hole constitute the channel that passes through the shaft-shaped connector. During processing, the threaded hole 101 and the through hole 102 can be processed in different processing steps, or obtained by different tools in the same processing step.

[0059] One specific embodiment (preferred embodiment, such as...) Figure 4 , 5 As shown), for the shaft-shaped connector 1 which is a hollow rod (i.e. a tube with a certain wall thickness), the same threaded holes 101 are provided on the walls on both sides of the hollow rod. The two threaded holes on the two side walls are coaxial and form the passage through the shaft-shaped connector. That is, during processing, the threaded holes on the two side walls can be completed in one processing step.

[0060] For hollow rods, a central threaded channel 105 can be provided in its central hole to add a connection position (e.g., Figure 28 (As shown).

[0061] In one specific embodiment, the shaft-shaped connector is a solid rod (such as...). Figure 6 , 7As shown in Figure 8, a threaded hole or countersunk hole 103 for a through shaft-shaped connector is provided on the solid rod body, and the threaded hole or countersunk hole constitutes the channel of the through shaft-shaped connector.

[0062] The following describes several application examples of the above-mentioned shaft-shaped connectors:

[0063] The first application embodiment (such as) Figure 10 As shown, this is an axial extension connection of two pipe fittings. The shaft-shaped connector 1 has holes 2 at both ends, and fastening screws 3 are threaded into both holes. External connecting pipes 4 are respectively fitted onto both ends of the shaft-shaped connector (the cross-sectional shape and size of the two external connecting pipes 4 can be the same or different; the cross-section of the external connecting pipe 4 can be circular, square, elliptical, etc., for example...). Figure 15 , 16 As shown in Figures 17 and 18, the cross-sections and dimensions of the corresponding shaft connectors 1 at both ends can be matched with those of the outer tube. The outer tube 4 and the shaft connectors 1 can be a transition fit or a clearance fit. The outer tube is provided with an enlarged hole at the position opposite to the first end of the channel so that an internal hex wrench can be inserted. The fastening screws 3 in the two channels both extend from the second end 202 of the channel and abut against the inner wall of the outer tube 4.

[0064] The two outer pipes 4 are fastened to the shaft-shaped connector 1 by the fastening screws 3 in the two holes pressing against the inner wall of the outer pipe 4. The cross-sections of the two outer pipes 4 can be planes or other shapes that can fit together.

[0065] like Figure 11 , 12 As shown, to prevent the thin-walled outer pipe 4 from deforming due to the pushing force of the end of the fastening screw 3, an arc-shaped piece 5 is provided between the inner wall surface of the outer pipe and the outer peripheral surface of the shaft-shaped connector (the arc-shaped piece 5 can be a metal piece or a plastic piece, and the shape of the arc-shaped piece 5 can match the inner wall surface of the outer pipe; the arc-shaped piece 5 can be a three-quarter, one-third, or one-half annular piece). The end of the fastening screw extending from the second end of the channel abuts against the inner wall surface of the arc-shaped piece, and the outer peripheral surface of the arc-shaped piece is in contact with the inner wall surface of the outer pipe. Due to the setting of the arc-shaped piece 5, the force-bearing area of ​​the inner wall surface of the outer pipe is greatly increased, avoiding deformation of the outer pipe 4 due to localized force.

[0066] Furthermore, a sealing ring 6 can be provided between the outer peripheral surface of the arc-shaped piece and the inner wall surface of the outer pipe (to adapt to situations requiring watertightness or airtightness). The sealing ring 6 can be made of materials such as rubber, and of course, the sealing ring 6 has holes for avoiding passageways.

[0067] The second application example (such as) Figure 13 , 14As shown), the difference between this second application embodiment and the first application embodiment is that one of the two outer tubes has a smaller diameter. In this case, one outer tube is fitted around the outer periphery of the shaft connector 1 (by fastening the inner wall of the outer tube 4 with a fastening screw 3 in one channel), and the other outer tube is inserted into the central hole of the shaft connector 1 (by fastening the outer wall of the outer tube 4 with a fastening screw 3 in another channel).

[0068] The third application example (such as) Figure 19 As shown in the figure, in this embodiment, the outer tubes 4 are respectively sleeved on both ends of the shaft connector at intervals. An intermediate threaded hole 104 is provided on the shaft connector between the two outer tubes (the intermediate threaded hole 104 can be one or more, and each additional one adds a connection channel). A stud 7 is inserted into the intermediate threaded hole. The stud 7 passes through the through hole 801 on the second outer tube 8 located above the shaft connector. Through this structure, the axial connection of the two outer tubes and the connection with the second outer tube 8 can be realized.

[0069] The fourth application example (such as) Figure 20 , 21 As shown), this embodiment applies the shaft-shaped connector to the handrail of a staircase. The shaft-shaped connector 1 is installed in the inner hole of the tubular handrail 9. The fastening screw 3 in the channel of the shaft-shaped connector 1 abuts against the inner wall of the handrail 9. One side of the handrail 9 is provided with an enlarged hole corresponding to the channel, so that an Allen wrench can pass through the enlarged hole and enter the channel to rotate the fastening screw 3. (For reliable fastening, the shaft-shaped connector 1 is provided with two channels, and fastening screws 3 are provided in both channels to tighten the handrail 9.)

[0070] The handrail and shaft connector are provided with a connecting hole 10 for threaded connection of the upper end of the post head screw 11 (the axis of the connecting hole 10 can be perpendicular or inclined to the axis of the handrail, such as...). Figure 20 For tilted settings -- for fully concealed configuration. Figure 21 (For vertical installation - partial exposed form), a riser 12 is provided on the steps of the staircase. A second shaft-shaped connector is provided in the upper part of the riser 12. The second shaft-shaped connector has two channels, and fastening screws 3 are connected in the two channels. One fastening screw 3 is placed on the inner wall of the riser 12, and the other fastening screw 3 is placed on the outer periphery of the lower end of the column head screw 11.

[0071] The fifth application example (such as) Figure 22As shown in the figure, this embodiment uses a shaft-shaped connector for the interlocking connection of multiple pipes. A shaft-shaped connector 1 is installed in the inner hole of a central pipe 13. The fastening screws 3 in the two channels of the shaft-shaped connector 1 abut against the inner wall of the central pipe 13. At the same time, the central pipe 13 and the shaft-shaped connector 1 are provided with a number of connection holes 10 for threaded connection of one end of the stud head screw 11. A number of side pipes 14 are provided on the outer periphery of the central pipe 13. A second shaft-shaped connector is provided in the body of the end of the side pipe 14. The second shaft-shaped connector is provided with two channels. Fastening screws 3 are connected in the two channels. One fastening screw 3 is placed against the inner wall of the side pipe 14, and the other fastening screw 3 is placed against the outer periphery of the other end of the stud head screw 11. In this embodiment, the side pipe 14 and the central pipe 13 can be connected vertically or at an angle.

[0072] In this embodiment, the connection of tees and even multi-axial pipes can be easily achieved by combining the connectors, that is, a three-dimensional five-way connection can be achieved as shown in the figure.

[0073] In the sixth application embodiment, an outer tube 15 is fitted around the aforementioned shaft-shaped connector 1 (the cross-section of the outer tube 15 can be circular, square, or elliptical, etc.; the outer tube can be a pipe or profile, etc.; the outer contour shape of the shaft-shaped connector 1 and the inner surface shape of the outer tube 15 can be identical or not completely the same, as long as at least partially fitted, to ensure that it will not move inside the outer tube). The outer tube has several enlarged holes 16 (the diameter of the enlarged holes is slightly larger than the diameter of the channel 2). The enlarged holes 16 are directly opposite the first or second end of the channel 2 on the shaft-shaped connector, but no enlarged hole is provided at the position of the fastening screw extending from the second end of the channel, i.e., as shown... Figure 23-25 As shown, the cross-section of the shaft connector 1 has two channels, corresponding to three enlarged holes (such as...). Figure 23 , 24 As shown, the threads of the three enlarged holes can be used to connect with other workpieces, or the shaft connector 1 has four channels on its cross-section, corresponding to five enlarged holes (such as...). Figure 25 As shown, the threads of the five enlarged holes can be used to connect with other workpieces.

[0074] To increase the number of connectable workstations, a central threaded channel 105 is provided in the central hole of the hollow shaft-shaped connector 1 (i.e., tubular), through which bolts can be connected, such as... Figure 27-29 As shown, Figure 27 Five threaded connection stations are provided, such as Figure 29 It provides seven threaded connection stations, thereby expanding the installation station.

[0075] Specific application structure as follows Figure 26As shown, a part 17 (which can be a plate or a pipe) to be installed is provided on the side of the outer tube 15 with a threaded through hole 18. A stud 19 is inserted into the threaded through hole 18 and the threaded hole (i.e., the channel 2) to achieve the fastening of the part 17 to be installed and the outer tube 15. A portion of the threaded hole is used to screw the fastening screw 3, and a portion of the threaded hole is used to screw the stud 19.

[0076] In this application embodiment, it can also be applied to the vertical connection of two pipe fittings (outer pipe 15 and through rod 27) (e.g. Figure 33 As shown), an outer tube 15 is fitted around the aforementioned shaft-shaped connector 1 (the cross-section of the outer tube 15 can be circular, square, or elliptical, etc., and the outer tube can be a pipe or profile, etc. The outer contour shape of the shaft-shaped connector 1 and the inner surface shape of the outer tube 15 can be identical or not completely the same, as long as at least partially fitted, so as to ensure that it will not move inside the outer tube). A through rod 27 is inserted vertically through the outer tube 15 and the shaft-shaped connector 1. The first fastening screw 3 in the channel 2 is pressed against the inner surface of the outer tube 15, and the second fastening screw 3 in the channel 2 is pressed against the outer surface of the through rod 27. The two fastening screws 3 in the channel 2 are coaxial (e.g., Figure 33 (As shown).

[0077] The seventh application example (such as) Figure 30-32 As shown), the aforementioned shaft-shaped connector 1 has one open end and one closed end (in this embodiment, the shaft-shaped connector 1 is a tube with one closed end and one open end). A screw 20 is inserted through the closed end, and the screw 20 passes through the body of the shaft-shaped connector 1 and exits the closed end. The shaft-shaped connector 1 is installed at the end of a tube 21 to be connected (the shaft-shaped connector 1 and the tube 21 to be connected are coaxially arranged; of course, the tube 21 to be connected can also be a profile, plate, etc. that can be coaxially installed with the shaft-shaped connector 1). The tube 21 to be connected has a hole facing the hole. The expansion hole 22 is provided to facilitate the insertion of the fastening screw 3 into the channel 2 (the fastening screw 3 passes through the expansion hole 22, is screwed into the channel 2 and pressed against the inner wall of the tube 21 to be connected). The tube 23 to be connected is provided on the side of the tube 21 to be connected (the tube 23 to be connected has a through hole for the screw 20 to pass through, and the through hole is close to the end of the tube 23 to be connected. Of course, the tube 23 to be connected can also be a profile, plate, etc. that can install the nut 24). The nut 24 to be fastened to the screw 20 is provided in the tube to be connected (near the end position).

[0078] When the pipe 23 to be connected is a round pipe, the end of the pipe 21 to be connected is an arc shape that is in contact with the pipe 23 to be connected. When the pipe 23 to be connected is a square pipe, the end of the pipe 21 to be connected is a flat surface that is in contact with the pipe 23 to be connected.

[0079] To improve the strength of the connection (such as...) Figure 31As shown in the figure, the pipe to be connected and the pipe to be connected are provided with a non-circular groove 25 at the relative position of the contact surface. The non-circular groove is provided with a gasket 26 that matches its shape. By setting the non-circular groove 25 and the gasket 26, the screw 20 can be prevented from slipping and rotating.

[0080] Similarly, in the above embodiments, in order to prevent the outer tube (including the outer pipe, the outer tube and other fittings used to install the shaft connector 1) from being pushed and deformed by the fastening screw 3, an arc-shaped piece 5 and / or a sealing ring 6 can be provided.

[0081] This invention significantly improves the convenience, robustness, reliability, and aesthetics of pipe connections through a simple, low-cost, and standardized shaft-shaped connector 1 and its unique concealed fixing method using a similar internal expansion mechanism. Furthermore, it overcomes the drawback of previous connection methods that required flanges to connect pipes with different cross-sections. In particular, the simple combination of multiple connectors enables multi-directional pipe connectivity. Its reusable disassembly and assembly feature provides unparalleled convenience for product assembly, packaging, transportation, installation, use, and recycling, making it an environmentally friendly and resource-saving solution.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A reusable, concealed T-shaped or vertical connector structure, characterized in that: The device includes a pipe to be connected and a pipe to be connected that are perpendicularly intersecting. A shaft-shaped connector is installed inside the end of the pipe to be connected. The shaft-shaped connector has at least one channel for screwing in a fastening screw. The channel extends radially through the shaft-shaped connector so that the fastening screw can be inserted from a first end of the channel and extended from a second end of the channel. The end of the fastening screw extending from the second end of the channel abuts against the inner wall of the pipe to be connected. The shaft-shaped connector is a pipe with one open end and one closed end. A screw is inserted through the closed end. The pipe to be connected has an outwardly enlarged hole that is directly opposite the channel so that the fastening screw can be inserted into the channel. The pipe to be connected has a through hole through which the screw can pass. A nut is provided inside the pipe to be connected and fastened to the screw.

2. The reusable, concealed T-shaped or vertical joint structure according to claim 1, characterized in that: The shaft-shaped connector is a hollow rod body. A threaded hole is provided on one side wall of the hollow rod body, and a through hole is provided on the opposite side wall of the threaded hole, which allows the fastening screw to pass through. The threaded hole and the through hole constitute the channel that passes through the shaft-shaped connector.

3. The reusable, concealed T-shaped or vertical joint structure according to claim 1, characterized in that: The shaft-shaped connector is a hollow rod body, and the same threaded holes are provided on the walls on both sides of the hollow rod body. The two threaded holes on the two side walls are coaxial and form the channel through the shaft-shaped connector.

4. The reusable, concealed T-shaped or vertical joint structure according to claim 1, 2, or 3, characterized in that: The shaft-shaped connector has several sets of holes in the circumferential direction, and / or the shaft-shaped connector has several sets of holes in the axial direction.

5. The reusable, concealed T-shaped or vertical joint structure according to claim 1, 2, or 3, characterized in that: An arc-shaped piece is provided between the inner wall surface of the pipe to be connected and the outer peripheral surface of the shaft-shaped connector. The end of the fastening screw extending from the second end of the channel abuts against the inner wall surface of the arc-shaped piece, and the outer peripheral surface of the arc-shaped piece is in contact with the inner wall surface of the outer pipe.

6. The reusable and reassembleable concealed T-shaped or vertical joint structure according to claim 5, characterized in that: A sealing ring is provided between the outer peripheral surface of the arc-shaped piece and the inner wall surface of the outer tube.

7. The reusable, concealed T-shaped or vertical joint structure according to claim 1, 2, or 3, characterized in that: The cross-sections of the pipe to be connected and the pipe being connected are circular, square, or elliptical.

8. The reusable and reassembleable concealed T-shaped or vertical joint structure according to claim 7, characterized in that: When the pipe to be connected is a round pipe, the end of the pipe to be connected is an arc shape that is in contact with the pipe to be connected.

9. The reusable and reassembleable concealed T-shaped or vertical joint structure according to claim 7, characterized in that: When the pipe to be connected is a square tube, the end of the pipe to be connected is a plane that is in contact with the pipe to be connected.

10. The reusable, concealed T-shaped or vertical joint structure according to claim 1, 2, or 3, characterized in that: The pipe to be connected and the pipe to be connected have non-circular grooves at their relative positions on the contact surfaces, and a gasket matching the shape of the non-circular groove is provided in the non-circular groove.

Images