Screw thread type fixed plastic connecting piece

Abstract

The utility model discloses a screw tooth type fixed plastic connecting piece, and aims to solve the technical problem that the service lives of a screwed joint of the screw tooth type fixed plastic connecting piece and a metal pipeline are shortened due to the fact that the screw tooth type fixed plastic connecting piece and the metal pipeline are possibly affected by vibration and are loosened and worn after being connected in the prior art. The connecting piece comprises a plastic connecting pipe in threaded connection between two sets of metal pipes, the two ends of the plastic connecting pipe are in threaded connection with the metal pipes through threaded connectors, a contraction box is fixedly installed on the outer side of the plastic connecting pipe, the two ends of the contraction box are in sliding connection with telescopic plates, and fastening mechanisms are installed at the ends, away from each other, of the two sets of telescopic plates. According to the plastic connecting pipe, the connecting position can be prevented from being loosened due to vibration, frictional wear between the threaded connector and the metal pipe is avoided, and the service life of the metal pipe and the plastic connecting pipe is further prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of plastic connectors, specifically relating to a threaded fixing plastic connector. Background Technology

[0002] Threaded fixed plastic connectors are plastic connectors specifically designed for connecting dissimilar materials such as metal and plastic. Through a metal-plastic synergistic structure, threaded fixed plastic connectors provide a high-strength, detachable dissimilar material connection solution for piping systems. By pre-cutting threaded grooves at the ends of the metal pipes, the injection-molded plastic connectors achieve engagement through external thread screw-in assembly at both ends.

[0003] Currently, after threaded plastic connectors are connected to metal pipes, vibration may cause slight loosening at the connection point. This loosening and friction can lead to wear and tear on both the metal pipe and the threaded joint of the threaded plastic connector, thus reducing the service life of both the threaded joint and the metal pipe.

[0004] Therefore, it is of great importance to design a spiral-tooth type fixed plastic connector to solve the above-mentioned defects. Utility Model Content

[0005] (1) Technical problems to be solved

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a threaded fixing plastic connector. This connector aims to solve the technical problem that the threaded fixing plastic connector may loosen and wear due to vibration after being connected to the metal pipe, thereby reducing the service life of the threaded joint of the threaded fixing plastic connector and the metal pipe.

[0007] (2) Technical solution

[0008] To solve the above-mentioned technical problems, this utility model provides a screw-type fixed plastic connector, which includes a plastic connecting pipe threaded between two sets of metal pipes. Both ends of the plastic connecting pipe are threaded to the metal pipes through threaded joints. A shrink box is fixedly installed on the outside of the plastic connecting pipe. Both ends of the shrink box are slidably connected to telescopic plates. A fastening mechanism is installed at the ends of the two sets of telescopic plates that are far apart.

[0009] The fastening mechanism includes a lifting plate slidably connected to the lower part of the telescopic plate. The telescopic plate has a fastening screw threaded inside, and the bottom end of the fastening screw is rotatably connected to the top of the lifting plate. A connector is fixedly connected to the bottom of the lifting plate, and a transmission rod is rotatably connected to both sides of the connector. An abutment plate is movably installed below the lifting plate, and a rubber protective plate is fixedly connected to the bottom of the abutment plate. A slide rod is fixedly installed at the top of the abutment plate, and springs are fitted at both ends of the slide rod. Sleeves are fitted on the outer side of the slide rod at the opposite end of the two sets of springs, and the tops of the two sets of sleeves are rotatably connected to the bottom end of the transmission rod. A damping rod is fixedly installed between the slide rod and the connector.

[0010] When using the connectors of this technical solution, after connecting the threaded joint of the plastic connecting tube to the two sets of metal tubes, extend the two sets of telescopic plates from the inside of the shrink box and select appropriate fastening points. Then, rotate the fastening screw downwards to drive the lifting plate downwards until the rubber protective plate at the bottom of the abutment plate abuts against the outside of the metal tube. The rubber protective plate protects the outside of the metal tube while ensuring a good fit and preventing damage. The abutment plate can apply pressure to the metal tube, thereby strengthening the connection between the plastic connecting tube and the metal tube and improving the tightness of the connection. At the same time, after vibration occurs at the connection between the plastic connecting tube and the metal tube, the transmission rod is affected by the vibration and pushes the sliding sleeve on the outside of the slide rod. The sliding sleeve pushes the spring to buffer the vibration, and the damping rod avoids the effect of spring rebound. This can prevent the connection from loosening due to vibration and avoid friction and wear between the threaded joint and the metal tube, further improving the service life of the metal tube and the plastic connecting tube.

[0011] Preferably, a first operating knob is fixedly connected to the top of the fastening screw, and both ends of the lifting plate are slidably connected to the telescopic plate via sliding columns.

[0012] Furthermore, both ends of the slide rod are fixedly connected to the abutment plate via mounting feet, and the bottom end of the damping rod is fixedly connected to the slide rod via a connecting sleeve.

[0013] Furthermore, both ends of the shrink box are fixedly connected to mounting edges, and both ends of the mounting edges are fixedly connected to the plastic connecting tube by mounting screws. A rubber protective pad is fixedly connected between the bottom of the shrink box and the plastic connecting tube.

[0014] Furthermore, the shrink box has two sets of transmission racks symmetrically slidably connected inside, and a drive gear is rotatably connected in the middle of the shrink box. Both sets of transmission racks mesh with the drive gear. A second operating knob is fixedly connected to the top of the central shaft of the drive gear. The ends of the two sets of transmission racks that are far apart are fixedly connected to the telescopic plate.

[0015] Furthermore, guide frames are fixedly installed inside the shrink box and at the bottom of both sets of transmission racks, and guide wheels are rotatably connected to both ends of the transmission racks and inside the guide frames.

[0016] Furthermore, a connecting block is fixedly connected to the top of the shrink box and outside the second operating knob. The connecting block is internally threaded with a fixing stud, and the fixing stud abuts against the second operating knob.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention utilizes a design that combines a shrink box, telescopic plates, and a fastening mechanism. After connecting the threaded joint of the plastic connecting tube to two sets of metal tubes, the two sets of telescopic plates extend from the inside of the shrink box to select appropriate fastening points. Then, the fastening screw is rotated downwards, causing the lifting plate to move downwards until the rubber protective plate at the bottom of the abutment plate abuts against the outside of the metal tube. The rubber protective plate ensures a good fit while protecting the outside of the metal tube from damage. The abutment plate applies pressure to the metal tube, strengthening the connection between the plastic connecting tube and the metal tube and improving its tightness. Simultaneously, when vibration occurs at the connection point, the transmission rod is affected by the vibration and pushes the sliding sleeve on the outside of the sliding rod. The sliding sleeve pushes the spring to buffer the vibration, while the damping rod prevents the spring from rebounding. This prevents the connection from loosening due to vibration and avoids friction and wear between the threaded joint and the metal tube, further improving the service life of the metal tube and the plastic connecting tube. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a schematic diagram of the plastic connecting pipe structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the shrink box of this utility model;

[0024] Figure 5 for Figure 4 Enlarged view at point B in the middle;

[0025] Figure 6 This is a schematic diagram of the fastening mechanism of this utility model.

[0026] The markings in the attached diagram are as follows: 1. Metal pipe; 2. Plastic connecting pipe; 3. Threaded joint; 4. Shrink box; 401. Mounting edge; 402. Mounting screw; 403. Rubber protective pad; 404. Transmission rack; 405. Drive gear; 406. Second operating knob; 407. Guide frame; 408. Guide wheel; 409. Connecting block; 410. Fixing stud; 5. Telescopic plate; 6. Fastening mechanism; 601. Lifting plate; 602. Fastening screw; 603. Connector; 604. Transmission rod; 605. Abutment plate; 606. Rubber protective plate; 607. Slide rod; 608. Spring; 609. Sliding sleeve; 610. Damping rod; 611. First operating knob; 612. Slide column; 613. Mounting foot; 614. Connecting sleeve. Detailed Implementation

[0027] This specific embodiment is a threaded fixed plastic connector, the structural diagram of which is shown below. Figure 1-6 As shown, the connector includes a plastic connecting pipe 2 threaded between two sets of metal pipes 1. Both ends of the plastic connecting pipe 2 are threaded to the metal pipes 1 through threaded joints 3. A shrink box 4 is fixedly installed on the outside of the plastic connecting pipe 2. Both ends of the shrink box 4 are slidably connected to telescopic plates 5. A fastening mechanism 6 is installed at the ends of the two sets of telescopic plates 5 that are far apart.

[0028] First, in this embodiment, the specific structure of the fastening mechanism 6 is as follows:

[0029] The fastening mechanism 6 includes a lifting plate 601 slidably connected to the lower part of the telescopic plate 5. A fastening screw 602 is threadedly connected to the inside of the telescopic plate 5, and the bottom end of the fastening screw 602 is rotatably connected to the top of the lifting plate 601. A connector 603 is fixedly connected to the bottom of the lifting plate 601, and transmission rods 604 are rotatably connected to both sides of the connector 603. An abutment plate 605 is movably installed below the lifting plate 601, and a rubber protective plate 606 is fixedly connected to the bottom of the abutment plate 605. A sliding rod 607 is fixedly installed on the top of the abutment plate 605. Springs 608 are fitted at both ends of the sliding rod 607. Sliding sleeves 609 are fitted on the outer side of the sliding rod 607 at the opposite end of the two sets of springs 608. The tops of both sets of sliding sleeves 609 are rotatably connected to the bottom end of the transmission rod 604. A damping rod 610 is fixedly installed between the sliding rod 607 and the connector 603. After connecting the two sets of metal pipes 1 via the threaded joint 3 of the plastic connecting pipe 2, the two sets of telescopic plates 5 are extended from the retracted position. The internal extension of the shrink box 4 is selected at a suitable fastening point. Then, the fastening screw 602 is rotated downward to drive the lifting plate 601 to move downward until the rubber protective plate 606 at the bottom of the abutment plate 605 abuts against the outside of the metal tube 1. The rubber protective plate 606 protects the outside of the metal tube 1 while ensuring a good fit and preventing damage. The abutment plate 605 can apply pressure to the metal tube 1, thereby strengthening the connection between the plastic connecting tube 2 and the metal tube 1 and improving the tightness of the connection. At the same time, after vibration occurs at the connection between the plastic connecting tube 2 and the metal tube 1, the transmission rod 604 is affected by the vibration and pushes the sliding sleeve 609 on the outside of the sliding rod 607. The sliding sleeve 609 pushes the spring 608 to buffer the vibration. At the same time, the damping rod 610 avoids the effect of the spring 608 rebounding. This can prevent the connection from loosening due to vibration and avoid friction and wear between the threaded joint 3 and the metal tube 1, further improving the service life of the metal tube 1 and the plastic connecting tube 2.

[0030] Furthermore, a first operating knob 611 is fixedly connected to the top of the fastening screw 602. Both ends of the lifting plate 601 are slidably connected to the telescopic plate 5 through the sliding column 612. The first operating knob 611 is used to operate the fastening screw 602 to lower the lifting plate 601. At the same time, the lifting plate 601 moves down stably under the connection of the sliding column 612, thereby using the rubber protective plate 606 at the bottom of the abutment plate 605 to abut against the outside of the metal pipe 1, thereby strengthening the connection between the plastic connecting pipe 2 and the metal pipe 1 and improving the tightness of the connection.

[0031] Then, both ends of the slide rod 607 are fixedly connected to the abutment plate 605 through mounting feet 613, and the bottom end of the damping rod 610 is fixedly connected to the slide rod 607 through the connecting sleeve 614. The mounting feet 613 facilitate the assembly of the abutment plate 605. The damping rod 610 is installed between the slide rod 607 and the connector 603 through the connecting sleeve 614 to perform its function.

[0032] Furthermore, both ends of the shrink box 4 are fixedly connected to mounting edges 401, and both ends of the mounting edges 401 are fixedly connected to the plastic connecting tube 2 by mounting screws 402. A rubber protective pad 403 is fixedly connected between the bottom of the shrink box 4 and the plastic connecting tube 2. The shrink box 4 is installed on the outside of the plastic connecting tube 2 by the mounting screws 402 in the mounting edges 401, and the rubber protective pad 403 protects the outside of the plastic connecting tube 2 to prevent damage.

[0033] The shrink box 4 has two sets of transmission racks 404 symmetrically slidably connected inside. A drive gear 405 is rotatably connected in the middle of the shrink box 4. Both sets of transmission racks 404 mesh with the drive gear 405. A second operating knob 406 is fixedly connected to the top of the central shaft of the drive gear 405. The ends of the two sets of transmission racks 404 that are far apart are fixedly connected to the telescopic plate 5. Before the plastic connecting tube 2 is used, the drive gear 405 is rotated by the second operating knob 406, and the telescopic plate 5 is retracted into the shrink box 4 under the transmission of the transmission racks 404, thereby reducing space occupation and facilitating storage. After the threaded joint 3 of the plastic connecting tube 2 is connected to the two sets of metal tubes 1, the two sets of telescopic plates 5 are extended from the inside of the shrink box 4 and a suitable fastening point is selected.

[0034] Secondly, guide frames 407 are fixedly installed inside the shrink box 4 and at the bottom of the two sets of transmission racks 404. Guide wheels 408 are rotatably connected to both ends of the transmission racks 404 and inside the guide frames 407. When the transmission racks 404 are controlled to extend and retract the telescopic plate 5, the guide wheels 408 roll inside the guide frames 407, thereby ensuring the stability of the telescopic plate 5.

[0035] Finally, a connecting block 409 is fixedly connected to the top of the shrink box 4 and to the outside of the second operating knob 406. A fixing stud 410 is threaded inside the connecting block 409 and abuts against the second operating knob 406. After the telescopic plate 5 extends and the connection between the plastic connecting tube 2 and the metal tube 1 is strengthened by the fastening mechanism 6, the fixing stud 410 is rotated to abut against the outside of the second operating knob 406, thereby preventing the second operating knob 406 from rotating and further ensuring the stability of the fastening mechanism 6.

[0036] When using the device of this technical solution, after connecting the threaded joint 3 of the plastic connecting tube 2 to the two sets of metal tubes 1, extend the two sets of telescopic plates 5 from the inside of the shrink box 4 and select a suitable fastening point. Then, rotate the fastening screw 602 downward to drive the lifting plate 601 to move downward until the rubber protective plate 606 at the bottom of the abutment plate 605 abuts against the outside of the metal tube 1. The rubber protective plate 606 protects the outside of the metal tube 1 to avoid damage while ensuring a good fit. The abutment plate 605 can apply pressure to the metal tube 1, thereby strengthening the connection between the plastic connecting tube 2 and the metal tube 1 and improving the connection. The tightness of the connection is ensured. When vibration occurs at the connection between the plastic connecting tube 2 and the metal tube 1, the transmission rod 604 is affected by the vibration and pushes the sliding sleeve 609 on the outside of the sliding rod 607. The sliding sleeve 609 pushes the spring 608 to buffer the vibration. At the same time, the damping rod 610 avoids the effect of the spring 608 rebounding, thereby preventing the connection from loosening due to vibration. The whole operation process is simple and convenient. This utility model can prevent the connection from loosening due to vibration and avoid friction and wear between the threaded joint 3 and the metal tube 1 through design, further improving the service life of the metal tube 1 and the plastic connecting tube 2.

[0037] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A screw-type fixed plastic connector, comprising a plastic connecting pipe (2) screwed between two groups of metal pipes (1); characterized in that, Both ends of the plastic connecting pipe (2) are connected with the metal pipe (1) through the threaded joint (3), the outside of the plastic connecting pipe (2) is fixedly installed with the shrink box (4), both ends of the shrink box (4) are slidably connected with the expansion plates (5), and the distal ends of the two groups of expansion plates (5) are fixedly installed with the fastening mechanisms (6). The fastening mechanism (6) comprises a lifting plate (601) slidably connected below the expansion plate (5), the inside of the expansion plate (5) is threadedly connected with a fastening screw (602), the bottom end of the fastening screw (602) is rotatably connected with the top of the lifting plate (601), the bottom of the lifting plate (601) is fixedly connected with a connecting head (603), the left and right sides of the connecting head (603) are rotatably connected with transmission rods (604), the bottom of the lifting plate (601) is movably installed with an abutting plate (605), the bottom of the abutting plate (605) is fixedly connected with a rubber protection plate (606), the top end of the abutting plate (605) is fixedly installed with a sliding rod (607), the two ends of the sliding rod (607) are sleeved with springs (608), the outside of the sliding rod (607) and at the opposite ends of the two groups of springs (608) are sleeved with sliding sleeves (609), the top of the two groups of sliding sleeves (609) is rotatably connected with the bottom end of the transmission rod (604), and the sliding rod (607) and the connecting head (603) are fixedly installed with a damping rod (610).

2. A screw-type fixed plastic connecting piece according to claim 1, characterized in that, The top end of the fastening screw (602) is fixedly connected with a first operation knob (611), and the two ends of the lifting plate (601) are slidably connected with the expansion plate (5) through sliding columns (612).

3. A screw-type fixed plastic connecting piece according to claim 1, characterized in that, The two ends of the sliding rod (607) are fixedly connected with the abutting plate (605) through mounting feet (613), and the bottom end of the damping rod (610) is fixedly connected with the sliding rod (607) through a connecting sleeve (614).

4. The threaded plastic fastener of claim 1, wherein: Both ends of the shrink box (4) are fixedly connected with mounting edges (401), the two ends of the mounting edge (401) are fixedly connected with the plastic connecting pipe (2) through mounting screws (402), and the bottom of the shrink box (4) and the plastic connecting pipe (2) are fixedly connected with a rubber protection pad (403).

5. The threadably secured plastic coupling according to claim 1, wherein: The inside of the shrink box (4) is symmetrically slidably connected with two groups of transmission tooth rods (404), the middle of the inside of the shrink box (4) is rotatably connected with a driving gear (405), the two groups of transmission tooth rods (404) are meshed with the driving gear (405), the top end of the central shaft of the driving gear (405) is fixedly connected with a second operation knob (406), and the distal ends of the two groups of transmission tooth rods (404) are fixedly connected with the expansion plates (5).

6. A screw-type fixed plastic connecting piece according to claim 5, characterized in that, The inside of the shrink box (4) and at the bottoms of the two groups of transmission tooth rods (404) are fixedly installed with guide frames (407), and the two ends of the transmission tooth rods (404) and at the inside of the guide frame (407) are rotatably connected with guide wheels (408).

7. A screw-type fixed plastic connecting piece according to claim 5, characterized in that, The top of the shrinkage box (4) and outside of the second operation knob (406) are fixedly connected with a connecting block (409), the inside of the connecting block (409) is threadedly connected with a fixed stud (410), and the fixed stud (410) abuts against the second operation knob (406).

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