Special connecting piece and connecting structure for pipe fitting and fitting with screw rod

Abstract

The utility model relates to a pipe fitting and a special connecting piece with a screw fitting and a connecting structure, the pipe fitting and the special connecting piece with the screw fitting comprise a connecting cylinder, the top of the connecting cylinder is provided with an opening for inserting the pipe fitting, the bottom of the connecting cylinder is provided with an end plate, the outer wall of the connecting cylinder is provided with a plurality of threaded holes, and the threaded holes are communicated with the connecting cylinder. A threaded hole is formed in the end plate and used for being in threaded connection with a jackscrew, and a connecting hole is formed in the end plate and used for being connected with a connecting rod with a screw accessory. The connecting structure of the pipe fitting and the accessory with the screw rod comprises the pipe fitting, a connecting cylinder and the accessory with the screw rod, the pipe fitting is inserted into the connecting cylinder and fixed through a jackscrew, and a connecting rod of the accessory with the screw rod is in threaded connection with a connecting hole of the connecting cylinder. The pipe fitting connecting device is simple in structure and convenient to use, the cylindrical connecting barrel or the rectangular barrel-shaped connecting barrel can be selected according to the shape of a pipe fitting, and quick mounting and dismounting of accessories with screws such as universal wheels, hooks and forks can be achieved.

Description

Technical Field

[0001] The utility model relates to a connecting piece, in particular to a special connecting piece for a pipe fitting and a screw rod fitting and a connecting structure. Background Art

[0002] Through pipe fittings and pipe fitting connectors, frame structures such as racks, display racks, and brackets can be formed. When a movable structure is required, wheels need to be installed at the bottom of the frame structure, and holes need to be punched in the pipe fittings to install the wheels or the wheels need to be installed by welding. This results in a relatively complicated wheel installation process, low efficiency, and inconvenient disassembly of the installed wheels. For pipe fittings, sometimes they need to be connected with hooks or forks, etc., and now generally, the pipe fittings are installed by punching holes or welding. Most universal wheels have screws themselves, and forks, hooks, etc. can also be designed for connecting screws, but existing pipe fitting connectors cannot achieve quick connection between pipe fittings and screw accessories. Therefore, there is an urgent need for a special connector that can quickly connect screw accessories to pipe fittings. Utility Model Content

[0003] The utility model aims to provide a special connector and a connecting structure for a pipe fitting and a screw fitting, so as to solve the problems that the installation efficiency of the screw fitting in the existing pipe fitting structure is low and the disassembly and assembly are inconvenient.

[0004] The utility model is implemented as follows: a special connector for a pipe fitting and a screw fitting, comprising a connecting tube, the top of the connecting tube is open and used for socketing the pipe fitting, an end plate is provided at the bottom of the connecting tube, a plurality of threaded holes are opened on the outer wall of the connecting tube, the threaded holes are used for threaded connection of top screws, and a connecting hole is opened on the end plate, the connecting hole is used for connecting a connecting rod with a screw fitting.

[0005] Among them, as the first form of the special connecting piece of the pipe fitting and the screw fitting of the utility model, the connecting cylinder is cylindrical.

[0006] Furthermore, reinforcement rings protruding from the outer wall surfaces are provided on the outer walls at the upper and lower ends of the connecting tube.

[0007] As the first form of the special connector for the pipe fitting and the screw fitting of the utility model, the connecting tube is in the shape of a rectangular tube.

[0008] As a further improvement of the pipe fitting and the special connector with screw fittings of the utility model, the threaded holes have multiple rows, and the multiple rows of threaded holes are respectively located on different sides of the connecting tube, and each row of threaded holes has at least two.

[0009] As a further improvement of the pipe fitting and the special connector with screw fittings of the utility model, a plurality of bosses are provided on the outer wall of the connecting tube, and the threaded holes are opened on the bosses.

[0010] The utility model also discloses a connection structure of a pipe fitting and a screw-type accessory, comprising a pipe fitting, a connecting tube and a screw-type accessory; the connecting tube has an opening at the top for inserting and plugging the pipe fitting, an end plate is provided at the bottom of the connecting tube, a plurality of threaded holes are provided on the outer wall of the connecting tube, the threaded holes are used for threaded connection of top screws, and a connecting hole is provided on the end plate; the end of the pipe fitting is inserted into the connecting tube, the top screw is screwed into the threaded hole to fix the pipe fitting and the connecting tube to each other, and the connecting rod with the screw-type accessory is inserted into the connecting hole.

[0011] As a further improvement of the connection structure of the pipe fitting and the screw fitting of the utility model, an internal thread is provided on the connection hole, and the connection rod with the screw fitting is threadedly connected to the connection hole.

[0012] As a further improvement of the connection structure of the pipe fitting and the screw fitting of the utility model, the connection cylinder is cylindrical or rectangular.

[0013] As a further improvement of the connection structure of the pipe fitting and the screw fitting of the utility model, the threaded holes have multiple rows, and the multiple rows of threaded holes are respectively located on different sides of the connecting tube, and each row of threaded holes has at least two.

[0014] Among them, the screw accessories can be universal wheels, hooks, forks, etc.

[0015] The utility model first proposes a special connector for pipe fittings and screw accessories, which is used for the quick connection between pipe fittings and screw accessories. The end of the pipe fitting can be directly inserted into the connecting tube, and the pipe fitting and the connecting tube can be fixed by screwing the top screw in the threaded hole, and the connecting rod at the top of the screw accessory can be inserted into the connecting hole of the end plate. After using the special connector of the utility model, the pipe fitting and the screw accessory can be quickly fixedly connected, and the process does not require welding and punching operations, which greatly improves the installation efficiency. At the same time, when the screw accessory does not need to be installed, the connecting tube can be quickly removed from the pipe fitting, realizing quick disassembly and assembly.

[0016] The connection structure of the pipe fitting and the accessory with screw rod of the utility model includes the above-mentioned special connection piece. The connection structure is easy to use and has a simple structure. A cylindrical connection tube or a rectangular connection tube can be selected according to the shape of the pipe fitting. The utility model is suitable for the quick connection and disassembly of accessories with screw rods such as universal wheels, hooks and forks and pipe fittings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a connection structure diagram of the pipe fitting and the universal wheel of the utility model.

[0018] Figure 2This is the first structural diagram of the special connecting piece of the utility model.

[0019] Figure 3 yes Figure 2 Top view of the .

[0020] Figure 4 yes Figure 2 Appearance diagram.

[0021] Figure 5 This is the second structural diagram of the special connector of the utility model.

[0022] Figure 6 yes Figure 5 Top view of the .

[0023] Figure 7 yes Figure 5 Appearance diagram.

[0024] In the figure: 1. connecting tube; 2. end plate; 3. threaded hole; 4. connecting hole; 5. top screw; 6. reinforcement ring; 7. boss; 8. universal wheel; 9. connecting rod; 10. pipe fitting. DETAILED DESCRIPTION

[0025] The embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0026] Embodiment 1

[0027] like Figure 2 , 3 As shown in , 4, this embodiment is a special connector for pipe fittings and screw fittings, including a connecting tube 1, the top of the connecting tube 1 is open, used for inserting and plugging the pipe fitting 10, an end plate 2 is provided at the bottom of the connecting tube 1, a plurality of threaded holes 3 are provided on the outer wall of the connecting tube 1, the threaded holes 3 are used for threaded connection of top screws 5, and a connecting hole 4 is provided on the end plate 2, and the connecting hole 4 is used for connecting the connecting rod 9 with the screw fitting. Among them, the connecting tube 1 is cylindrical. The inner cavity of the cylindrical connecting tube 1 is cylindrical, used to accommodate the round pipe fitting 10.

[0028] In order to increase the overall structural strength of the connecting tube 1 , reinforcement rings 6 protruding from the outer wall surface are provided on the outer walls of the upper and lower ends of the connecting tube 1 .

[0029] The threaded hole 3 is arranged on the side wall of the connecting tube 1. Since the side wall of the connecting tube 1 is relatively thin, when the threaded hole 3 is directly opened on the side wall, its length will be relatively short. In order to extend the length of the threaded hole 3, a boss 7 is provided on the side wall of the connecting tube 1, and the threaded hole 3 is opened on the boss 7. At this time, the length of the threaded hole 3 is the height of the boss 7 plus the thickness of the side wall. In this way, when the top screw 5 is screwed into the threaded hole 3, it can be ensured that the top screw 5 is fully matched with the threaded hole 3, so that the top screw 5 can stably provide sufficient tightening force to prevent the pipe fitting 10 inserted into the connecting tube 1 or the top screw 5 screwed into the threaded hole 3 from falling out.

[0030] Since the distance between the edge of the boss 7 and the reinforcement ring 6 is small, in order to facilitate the casting process, the boss 7 and the reinforcement ring 6 are directly connected to each other.

[0031] There are multiple rows of threaded holes 3 on the side wall of the connecting tube 1, each row contains at least two threaded holes 3, and the line connecting two adjacent rows of threaded holes 3 to the axis of the connecting tube 1 should form a certain angle, and the optimal angle is 90°. By tightening the pipe fitting 10 in the connecting tube 1 in two vertical directions, it can ensure that the connection between the pipe fitting 10 and the connecting tube 1 is firm and stable.

[0032] The connecting hole 4 is located at the center of the bottom end plate 2 of the connecting tube 1, and the inner wall of the connecting hole 4 can be processed into an internal thread of corresponding size according to the diameter of the connecting rod 9 on the screw fitting.

[0033] Embodiment 2

[0034] like Figure 5 , 6 As shown in , 7, this embodiment is a special connector for pipe fittings and screw fittings, including a connecting tube 1, the top of the connecting tube 1 is open, used for inserting and plugging a pipe fitting 10, an end plate 2 is provided at the bottom of the connecting tube 1, a plurality of threaded holes 3 are provided on the outer wall of the connecting tube 1, the threaded holes 3 are used for threaded connection of top screws 5, and a connecting hole 4 is provided on the end plate 2, and the connecting hole 4 is used for connecting a connecting rod 9 with a screw fitting. Among them, the connecting tube 1 is a rectangular tube. The inner cavity cross section of the rectangular tube-shaped connecting tube 1 is rectangular, and is used to accommodate a square tube or rectangular pipe fitting 10.

[0035] The threaded hole 3 is arranged on the side wall of the connecting tube 1. Since the side wall of the connecting tube 1 is relatively thin, when the threaded hole 3 is directly opened on the side wall, its length will be relatively short. In order to extend the length of the threaded hole 3, a boss 7 is provided on the side wall of the connecting tube 1, and the threaded hole 3 is opened on the boss 7. At this time, the length of the threaded hole 3 is the height of the boss 7 plus the thickness of the side wall. In this way, when the top screw 5 is screwed into the threaded hole 3, it can be ensured that the top screw 5 is fully matched with the threaded hole 3, so that the top screw 5 can stably provide sufficient tightening force to prevent the pipe fitting 10 inserted into the connecting tube 1 or the top screw 5 screwed into the threaded hole 3 from falling out.

[0036] There are multiple rows of threaded holes 3 on the side wall of the connecting tube 1, each row includes at least two threaded holes 3, and generally one row of threaded holes 3 is respectively arranged on two adjacent side surfaces of the connecting tube 1, or multiple rows of threaded holes 3 can be respectively arranged on two adjacent side surfaces. By tightening the pipe fitting 10 in the connecting tube 1 in two vertical directions, it can ensure that the connection between the pipe fitting 10 and the connecting tube 1 is firm and stable.

[0037] The connecting hole 4 is located at the center of the bottom end plate 2 of the connecting tube 1, and the inner wall of the connecting hole 4 can be processed into an internal thread of corresponding size according to the diameter of the connecting rod 9 on the screw fitting.

[0038] Embodiment 3

[0039] like Figure 1 As shown, this embodiment is a connection structure of a pipe fitting and a screw fitting, comprising a pipe fitting 10, a connecting tube 1 and a screw fitting. The screw fitting may be a universal wheel 8, a hook or fork with a screw on the top, etc. In this embodiment, the universal wheel 8 is taken as an example, and the existing hook or fork can be connected with a screw at the top of its structure, so that it can be quickly connected with the pipe fitting using the special connector of the utility model.

[0040] The top of the connecting tube 1 is open and used for inserting and plugging the pipe fitting 10. An end plate 2 is provided at the bottom of the connecting tube 1. A plurality of threaded holes 3 are provided on the outer wall of the connecting tube 1. The threaded holes 3 are used for threaded connection of the top screws 5. A connecting hole 4 is provided on the end plate 2. The end of the pipe fitting 10 is inserted into the connecting tube 1. The top screws 5 are screwed into the threaded holes 3 to fix the pipe fitting 10 and the connecting tube 1 to each other. The connecting rod 9 of the universal wheel 8 is inserted into the connecting hole 4.

[0041] Among them, most of the universal wheels 8 are provided with a connecting rod for connection at the top, and the connecting rod 9 is a screw rod, and an internal thread is provided on the connecting hole 4, and the connecting rod 9 is threadedly connected to the connecting hole 4.

[0042] The connecting tube 1 is cylindrical or rectangular, and is selected according to the type of the pipe fitting 10. When the pipe fitting 10 is a round tube, a cylindrical connecting tube 1 is selected; when the pipe fitting 10 is a square tube or a rectangular tube, a rectangular connecting tube 1 is selected.

[0043] There are multiple rows of threaded holes 3 on the connecting tube 1, and the multiple rows of threaded holes 3 are respectively located on different sides of the connecting tube 1, and each row of threaded holes 3 has at least two. Generally, two rows of threaded holes 3 are provided, and the angle between the two rows of threaded holes 3 and the center line of the connecting tube 1 is 90°. The pipe fitting 10 in the connecting tube 1 is tightened by forces in two directions perpendicular to each other, which can ensure the firmness and stability of the connection between the pipe fitting 10 and the connecting tube 1.

[0044] The connecting hole 4 is provided with an internal thread, and the diameter of the internal thread is processed according to the model of the connecting rod 9 of the universal wheel 8 to be installed.

[0045] During installation, the end of the pipe fitting 10 is directly inserted into the connecting tube 1, and then the top screw 5 is screwed into the threaded hole 3 to tighten the pipe fitting 10, so that the pipe fitting 10 can be fixedly connected to the connecting tube 1, and then the connecting rod 9 of the universal wheel 8 is screwed into the connecting hole 4, so that the universal wheel 8 can be fixed to the connecting tube 1, and the universal wheel 8 can be quickly connected to the pipe fitting 10. When the universal wheel 8 needs to be disassembled, the top screw 5 is directly unscrewed, and the connecting rod 9 is unscrewed from the connecting hole 4 of the connecting tube 1, so that the universal wheel 8 can be quickly disassembled.

Claims

1. A special connection piece for a pipe fitting and a screw fitting, characterized in that: It includes a connecting tube, the top of which is open and used for socket pipe fittings. An end plate is provided at the bottom of the connecting tube. A plurality of threaded holes are opened on the outer wall of the connecting tube, and the threaded holes are used for threaded connection of top screws. A connecting hole is opened on the end plate, and the connecting hole is used to connect a connecting rod with a screw fitting.

2. The pipe fitting and the special connector with screw fitting according to claim 1, characterized in that: The connecting cylinder is cylindrical.

3. The pipe fitting and the special connection piece with screw fitting according to claim 2, characterized in that: Reinforcement rings protruding from the outer wall surface are arranged on the outer walls of the upper and lower ends of the connecting tube.

4. The pipe fitting and the special connection piece with screw fitting according to claim 1, characterized in that: The connecting tube is in the shape of a rectangular tube.

5. The pipe fitting and the special connection piece with screw fitting according to claim 1, characterized in that: There are a total of multiple rows of threaded holes, and the multiple rows of threaded holes are respectively located on different sides of the connecting tube, and each row of threaded holes has at least two threads.

6. The pipe fitting and the special connection piece with screw fitting according to claim 1, characterized in that: A plurality of bosses are arranged on the outer wall of the connecting tube, and the threaded holes are opened on the bosses.

7. A connection structure between a pipe fitting and a screw fitting, characterized in that: It includes a pipe fitting, a connecting tube and a screw fitting; the connecting tube has an opening at the top for inserting and plugging the pipe fitting, an end plate is provided at the bottom of the connecting tube, a plurality of threaded holes are provided on the outer wall of the connecting tube, the threaded holes are used for threaded connection of top screws, and a connecting hole is provided on the end plate; the end of the pipe fitting is inserted into the connecting tube, the top screw is screwed into the threaded hole to fix the pipe fitting and the connecting tube to each other, and the connecting rod with the screw fitting is inserted into the connecting hole.

8. The connection structure of the pipe fitting and the screw fitting according to claim 7, characterized in that: An internal thread is provided on the connecting hole, and the connecting rod with the screw fitting is threadedly connected to the connecting hole.

9. The connection structure of the pipe fitting and the screw fitting according to claim 7, characterized in that: The connecting cylinder is cylindrical or rectangular.

10. The connection structure of the pipe fitting and the screw fitting according to claim 7, characterized in that: There are a total of multiple rows of threaded holes, and the multiple rows of threaded holes are respectively located on different sides of the connecting tube, and each row of threaded holes has at least two threads.

Images