Anti-falling type pipe joint structure

Abstract

The utility model discloses an anti-falling type pipe joint structure which comprises a pipe joint and pipelines arranged on the two sides of the pipe joint, first external thread pipes are fixed to the left end and the right end of the pipe joint, second external thread pipes are fixed to the ends, close to the pipe joint, of the pipelines, and nuts are connected between the second external thread pipes and the first external thread pipes in a threaded mode. When a nut is in threaded connection between the outer wall of a first external threaded pipe and the outer wall of a second external threaded pipe, a rope wheel needs to be rotated firstly, the rope wheel winds a pull rope, the pull rope pulls a pull rod, the pull rod pulls a pressing plate to extrude a reset spring, and therefore the pressing plate drives a limiting rod to move into a limiting base; then when the nut rotates to the position between the exteriors of the first external threaded pipe and the second external threaded pipe, one limiting sleeve is aligned with the limiting rod, the rope wheel can be loosened, then the limiting rod is inserted into the limiting sleeve due to the reset of the reset spring, connection of the first external threaded pipe and the second external threaded pipe is limited, and therefore the anti-disengaging effect is achieved; and the connection stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe joints, in particular to an anti-slip type pipe joint structure. Background Art

[0002] A pipe fitting is a part that connects pipes in a hydraulic system or installs pipes on hydraulic components. It is a general term for connectors that can be installed and removed in a fluid pathway, and mainly includes: welding type, ferrule type, crimping type and flaring type. A pipe fitting is a connection tool between pipes and a detachable connection point between components and pipes. It plays an indispensable and important role in pipe fittings. It is one of the two main components of hydraulic pipelines. Pipe fittings are used for straight-line connections such as instruments. The connection forms include socket welding or threaded connection. They are mainly used for small-diameter low-pressure pipelines, used in areas that require frequent installation and removal, or as the final adjustment of pipelines using threaded pipe fittings.

[0003] Currently, pipe joints are used when connecting pipelines to ensure the sealing of the connection between the two pipes. Since most of the connections are tightened and fixed by nuts, there is thermal expansion and contraction or loosening during the use of the pipe joints, which may cause the pipe joints to fall off, thereby affecting the stability of the pipe joint connection. Utility Model Content

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide an anti-slip pipe joint structure to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the utility model provides an anti-slip pipe joint structure, including a pipe joint and pipes arranged on both sides thereof, wherein a first externally threaded pipe is fixed at both left and right ends of the pipe joint, a second externally threaded pipe is fixed at one end of the pipe close to the pipe joint, a nut is threadedly connected between the second externally threaded pipe and the outside of the first externally threaded pipe, a plurality of limit sleeves are evenly fixed on the outer wall of the nut in a ring shape, a limit seat is fixed at both front and back ends of the pipe joint, a pair of limit rods are symmetrically slidably connected on the left and right sides of the limit seat, the limit rods are plugged into the limit sleeves, a circle of grooves are opened on the left and right sides of the inner wall of the limit seat, a pressure plate is slidably connected inside the groove, the outer end of the pressure plate is fixed to the inner end of the limit rod, and a reset spring is connected between the inner end of the pressure plate and the inner wall of the groove.

[0006] Preferably, a cannula is fixedly connected to the outer side of the end of the second externally threaded tube, the outer diameter of the cannula matches the inner diameter of the first externally threaded tube, and the cannula is plugged into the first externally threaded tube.

[0007] Preferably, the outer diameter of the first externally threaded tube matches the outer diameter of the second externally threaded tube.

[0008] Preferably, a pull rod is fixed to the inner end of the pressure plate, the pull rod is located inside the reset spring, a pull rope is fixed to the inner end of the pull rod, and the end of the pull rope is movably connected to the upper end of the limiting seat.

[0009] Preferably, a rotating assembly is installed on the upper end of the pipe joint, a pulley is connected to the upper part of the rotating assembly, a boss is fixed on the upper end of the pulley, and the end of the pull rope is fixed to the outer wall of the pulley.

[0010] Preferably, the rotating assembly includes a fixed ring, a rotating seat and balls, the fixed ring is fixed to the upper end of the pipe joint, the rotating seat is arranged on the inner side of the fixed ring, the upper end of the rotating seat is fixed to the lower end of the pulley, and a circle of annular grooves are opened on the outer wall of the rotating seat and the inner wall of the fixed ring, and there are multiple balls that are equidistantly rolled in a ring shape between the annular grooves.

[0011] The beneficial effect of the present invention is as follows: when the nut is threadedly connected between the first externally threaded tube and the outer wall of the second externally threaded tube, it is necessary to rotate the rope pulley first to make the rope pulley reel in the pull rope, and the pull rope pulls the pull rod, and the pull rod will pull the pressure plate to squeeze the reset spring, so that the pressure plate will drive the limit rod to move into the limit seat, and then when the nut is rotated between the first externally threaded tube and the outside of the second externally threaded tube, one of the limit sleeves is aligned with the limit rod, and the rope pulley can be loosened, and then the limit rod is reset by the reset spring and inserted into the limit sleeve to limit the connection between the first externally threaded tube and the second externally threaded tube, thereby preventing it from falling off and ensuring the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an overall schematic diagram of the utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the fixing ring of the present utility model;

[0014] Figure 3 It is a cross-sectional schematic diagram of the limit seat of the utility model.

[0015] In the figure: 1. pipe joint; 2. first externally threaded pipe; 3. pipe; 4. second externally threaded pipe; 5. insert pipe; 6. nut; 7. limit sleeve; 8. limit seat; 9. limit rod; 10. pull rope; 11. pulley; 12. fixing ring; 13. boss; 14. rotating seat; 15. ball bearing; 16. groove; 17. pressure plate; 18. return spring; 19. pull rod. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Reference Figure 1-3 , an anti-slip pipe joint structure, including a pipe joint 1 and pipes 3 arranged on both sides thereof, the first externally threaded pipe 2 is fixed at both ends of the pipe joint 1, the second externally threaded pipe 4 is fixed at one end of the pipe 3 close to the pipe joint 1, and a cannula 5 is fixedly connected to the outer side of the end of the second externally threaded pipe 4, the outer diameter of the cannula 5 matches the inner diameter of the first externally threaded pipe 2, and the cannula 5 is plugged into the first externally threaded pipe 2. When connecting two pipes 3 through the pipe joint 1, it is necessary to first insert the cannula 5 of the pipe 3 into the first externally threaded pipe 2 of the pipe joint 1;

[0018] The outer diameter of the first externally threaded tube 2 matches the outer diameter of the second externally threaded tube 4. A nut 6 is threadedly connected between the second externally threaded tube 4 and the outside of the first externally threaded tube 2. After the cannula 5 is inserted into the first externally threaded tube 2, the nut 6 can be rotated. The nut 6 rotates from the outside of the second externally threaded tube 4 to the outside of the first externally threaded tube 2. The nut 6 is rotated between the outside of the second externally threaded tube 4 and the outside of the first externally threaded tube 2 to complete the connection of the two pipes 3 through the pipe joint 1;

[0019] The outer wall of the nut 6 is annular and evenly fixed with multiple limit sleeves 7. The front and rear ends of the pipe joint 1 are fixed with limit seats 8. A pair of limit rods 9 are symmetrically slidably connected on the left and right sides of the limit seat 8. The limit rods 9 are plugged into the limit sleeves 7. A circle of grooves 16 are opened on the left and right sides of the inner wall of the limit seat 8. A pressure plate 17 is slidably connected inside the groove 16. The outer end of the pressure plate 17 is fixed to the inner end of the limit rod 9. A return spring 18 is connected between the inner end of the pressure plate 17 and the inner wall of the groove 16. When the nut 6 is rotated between the second externally threaded tube 4 and the outside of the first externally threaded tube 2, it is necessary to move the limit rod 9 into the limit seat 8. At this time, the pressure plate 17 moves to squeeze the return spring 18. Then when one of the limit sleeves 7 is aligned with the limit rod 9, the limit rod 9 is reset by the return spring 18 and inserted into the limit sleeve 7 to limit the nut 6, thereby preventing it from falling off and ensuring the stability of the connection;

[0020] A pull rod 19 is fixed to the inner end of the pressure plate 17. The pull rod 19 is located inside the return spring 18. A pull rope 10 is fixed to the inner end of the pull rod 19. The end of the pull rope 10 is movably connected to the upper end of the limit seat 8. By pulling the pull rope 10, the pull rod 19 can be pulled to move, and the pull rod 19 will pull the pressure plate 17 to move and squeeze the return spring 18.

[0021] The upper end of the pipe joint 1 is provided with a rotating assembly, and the upper end of the rotating assembly is connected to the rope pulley 11. The upper end of the rope pulley 11 is fixed with a boss 13, and the end of the pull rope 10 is fixed to the outer wall of the rope pulley 11. The rotating assembly includes a fixing ring 12, a rotating seat 14 and a ball 15. The fixing ring 12 is fixed to the upper end of the pipe joint 1, and the rotating seat 14 is arranged on the inner side of the fixing ring 12. The upper end of the rotating seat 14 is fixed to the lower end of the rope pulley 11. The outer wall of the rotating seat 14 and the inner wall of the fixing ring 12 are provided with a circle of annular grooves, and the balls 15 are multiple and equidistantly connected in an annular groove. By rotating the rope pulley 11, the rope pulley 11 can reel in the pull rope 10, thereby pulling the four pull ropes 10 at the same time. When the rope pulley 11 rotates, the rotating seat 14 can be driven to rotate, and the rotating seat 14 rotates with the fixing ring 12 through the ball 15, which is conducive to the rotation of the rope pulley 11.

[0022] When the first external threaded tube 2 is inserted into the second external threaded tube 2, the nut 6 can be rotated, and the nut 6 can be rotated from the outside of the second external threaded tube 4 to the outside of the first external threaded tube 2, so that the nut 6 can be rotated between the outside of the second external threaded tube 4 and the outside of the first external threaded tube 2 to complete the connection of the two pipes 3 through the pipe joint 1. In this process, the pulley 11 can be rotated, and the pulley 11 can reel in the pulley 10 to pull the four pull ropes 10 at the same time, so that the pull rope 10 pulls the pull rod 19 to move, and the pull rod 19 will pull the pressure plate 17 to move and squeeze the return spring 18, so that the limit rod 9 moves into the limit seat 8, and then one of the limit sleeves 7 is rotated to align with the limit rod 9, and the pulley 11 can be loosened. The limit rod 9 is reset by the return spring 18 and inserted into the limit sleeve 7 to limit the nut 6, thereby preventing it from falling off and ensuring the stability of the connection.

[0023] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-detachable pipe joint structure, comprising a pipe joint (1) and pipes (3) arranged on both sides thereof, wherein a first externally threaded pipe (2) is fixed to both left and right ends of the pipe joint (1), a second externally threaded pipe (4) is fixed to one end of the pipe (3) close to the pipe joint (1), and a nut (6) is threadedly connected between the second externally threaded pipe (4) and the outside of the first externally threaded pipe (2), characterized in that: The outer wall of the nut (6) is annular and evenly fixed with a plurality of limit sleeves (7). The front and rear ends of the pipe joint (1) are fixed with limit seats (8). The left and right sides of the inner wall of the limit seat (8) are symmetrically slidably connected with a pair of limit rods (9). The limit rods (9) are plugged into the limit sleeves (7). The left and right sides of the inner wall of the limit seat (8) are each provided with a circle of grooves (16). The inner wall of the groove (16) is slidably connected with a pressure plate (17). The outer end of the pressure plate (17) is fixed to the inner end of the limit rod (9). A return spring (18) is connected between the inner end of the pressure plate (17) and the inner wall of the groove (16).

2. The anti-slip pipe joint structure according to claim 1, characterized in that: The outer side of the end of the second externally threaded tube (4) is fixedly connected with a cannula (5), the outer diameter of the cannula (5) matches the inner diameter of the first externally threaded tube (2), and the cannula (5) is plugged into the first externally threaded tube (2).

3. The anti-slip pipe joint structure according to claim 2, characterized in that: The outer diameter of the first externally threaded tube (2) matches the outer diameter of the second externally threaded tube (4).

4. The anti-slip pipe joint structure according to claim 1, characterized in that: A pull rod (19) is fixed to the inner end of the pressure plate (17), and the pull rod (19) is located inside the return spring (18). A pull rope (10) is fixed to the inner end of the pull rod (19), and the end of the pull rope (10) is movably connected to the upper end of the limit seat (8).

5. The anti-slip pipe joint structure according to claim 4, characterized in that: A rotating assembly is installed at the upper end of the pipe joint (1), a rope pulley (11) is connected to the upper part of the rotating assembly, a boss (13) is fixed to the upper end of the rope pulley (11), and the end of the pull rope (10) is fixed to the outer wall of the rope pulley (11).

6. The anti-slip pipe joint structure according to claim 5, characterized in that: The rotating assembly comprises a fixed ring (12), a rotating seat (14) and a ball (15), wherein the fixed ring (12) is fixed to the upper end of the pipe joint (1), the rotating seat (14) is arranged on the inner side of the fixed ring (12), the upper end of the rotating seat (14) is fixed to the lower end of the rope pulley (11), an annular groove is formed on the outer wall of the rotating seat (14) and the inner wall of the fixed ring (12), and a plurality of balls (15) are connected in an annular manner and are equidistantly rolled between the annular grooves.

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