Internal expansion device for composite pipe joint

Abstract

The utility model discloses an internal expansion device for a composite pipe joint, which comprises a supporting base and has the beneficial effects that an internal expansion rod, a limiting plate and a limiting mounting groove are arranged, so that the internal expansion rod is mounted on the inner sides of a fixed support and an impact side seat, and the internal expansion rod is limited and mounted between the limiting plate and the limiting mounting groove; an inner expansion rod slides in a fixed support and an impact side seat in a limited mode, installation between a fixed side block at one end of the inner expansion rod and an installation frame is facilitated, and inner expansion treatment of the composite pipe joint is completed through an inner expansion head installed at the other end of the inner expansion rod; the output end of the hydraulic cylinder drives the sliding support and the mounting frame to move, the mounting frame drives the inner expansion rod and the inner expansion head to move through the fixed side block, the inner wall of the composite pipe is expanded through the inner expansion head, the composite pipe is tightly attached to a metal pipe fitting, and therefore firm and sealed connection is formed.

Description

Technical Field

[0001] This utility model relates to the field of joint internal expansion technology, specifically to a composite pipe joint internal expansion device. Background Technology

[0002] Metal pipe fittings are typically installed using a crimping device. The working principle of crimping fittings is mainly based on mechanical extrusion deformation to achieve sealing and connection functions. However, during the crimping process, the contact area between the pipe and the fitting may be relatively small and unevenly distributed, which can easily affect the stability of the connection and the sealing performance. The crimping process may also cause some damage or deformation to the pipe. Utility Model Content

[0003] The purpose of this utility model is to provide a composite pipe joint internal expansion device to solve the problem that in the above-mentioned crimping device, the contact area between the pipe and the fitting may be relatively small and unevenly distributed during the crimping process, which can easily affect the stability and sealing performance of the connection, and may cause certain damage or deformation to the pipe during the crimping process.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a composite pipe joint internal expansion device, comprising:

[0005] Support base;

[0006] A fixed support plate is installed on top of the support base;

[0007] The hydraulic cylinder is installed on one side of the fixed support plate;

[0008] A sliding support is provided at the output end of the hydraulic cylinder, and the sliding support is slidably connected to the support base.

[0009] The mounting frame is located on one side of the sliding support;

[0010] An internal expansion rod is installed on one side of a mounting frame, on which mounting components are provided;

[0011] An internal expansion head is installed at one end of an internal expansion rod. A fixed support is slidably connected to the outer side of the internal expansion rod, and the fixed support is fixedly connected to the support base.

[0012] As a preferred embodiment of this utility model: the mounting assembly includes a mounting plate and mounting screws. The mounting plate is provided on the top of the mounting frame, and two mounting screws are fixedly connected to the bottom of the mounting plate. The mounting frame has a second mounting hole that mates with the mounting screws. One end of the inner expansion rod is fixedly connected to a fixing side block. The fixing side block has two first mounting holes that mate with the mounting screws. A second fixing nut that mates with the mounting screws is provided at the bottom of the mounting frame.

[0013] As a preferred embodiment of this utility model: four limiting plates are fixedly connected at equal intervals on the outer side of the inner expansion rod, and an impact side seat is slidably connected on the outer side of the fixed support. One side of the impact side seat is fixedly connected to the fixed support. Four limiting installation grooves that cooperate with the limiting plates are equally spaced on the inner sides of both the fixed support and the impact side seat.

[0014] As a preferred embodiment of this utility model: one end of the inner expansion rod is fixedly connected to a plurality of fixing screws at equal intervals, one end of the inner expansion head is fixedly connected to a first mounting side block, the outer side of the first mounting side block is fixedly connected to a plurality of fixing side plates at equal intervals, the inside of the fixing side plate is provided with mounting holes that cooperate with the fixing screws, and one side of the fixing side plate is provided with a first fixing nut that cooperates with the fixing screws.

[0015] As a preferred embodiment of this utility model: a second mounting side block is fixedly connected to one side of the first mounting side block, and an mounting side groove that mates with the second mounting side block is provided at one end of the inner expansion rod.

[0016] As a preferred embodiment of this utility model: a limiting slide rod is symmetrically fixedly connected to one side of the sliding support, and the limiting slide rod is slidably connected to the fixed support plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, by setting an internal expansion rod, a limiting plate, and a limiting installation groove, realizes the installation of the internal expansion rod inside the fixed support and the impact side seat. The limiting plate and the limiting installation groove limit the internal expansion rod to slide within the fixed support and the impact side seat, facilitating the installation between the fixed side block of one end of the internal expansion rod and the mounting frame. The internal expansion head installed at the other end of the internal expansion rod completes the internal expansion treatment of the composite pipe joint. By setting a hydraulic cylinder, a sliding support, and a limiting slide rod, the output end of the hydraulic cylinder drives the sliding support and the mounting frame to move. The mounting frame drives the internal expansion rod and the internal expansion head to move through the fixed side block. The internal expansion head expands the inner wall of the composite pipe, making it tightly fit with the metal pipe fitting, thereby forming a firm and sealed connection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a left view of the fixed support of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal expansion mechanism of this utility model.

[0022] In the diagram: 1. Support base; 2. Fixed support; 3. Impact side seat; 4. No. 2 fixing nut; 5. Limiting mounting groove; 6. Internal expansion rod; 7. Limiting plate; 8. No. 1 mounting side block; 9. Internal expansion head; 10. Mounting side groove; 11. No. 2 mounting side block; 12. Fixed side plate; 13. Mounting hole; 14. Fixing screw; 15. No. 1 fixing nut; 16. Fixed support plate; 17. Hydraulic cylinder; 18. Sliding support; 19. Limiting slide rod; 20. Mounting frame; 21. Fixed side block; 22. No. 1 mounting hole; 23. No. 2 mounting hole; 24. Mounting plate; 25. Mounting screw. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a composite pipe joint internal expansion device, comprising: a support base 1; a fixed support plate 16 fixedly connected to the top of the support base 1; a hydraulic cylinder 17 installed on one side of the fixed support plate 16; a sliding support 18 fixedly connected to the output end of the hydraulic cylinder 17, and the sliding support 18 is slidably connected to the support base 1; a mounting frame 20 fixedly connected to one side of the sliding support 18; an internal expansion rod 6 installed on one side of the mounting frame 20, and a mounting assembly is provided on the mounting frame 20; an internal expansion head 9 installed at one end of the internal expansion rod 6, and a fixed support 2 slidably connected to the outer side of the internal expansion rod 6, the fixed support 2 being fixedly connected to the support base 1. The internal expansion head 9 expands the inner wall of the composite pipe, making it tightly fit with the metal pipe fitting, thereby forming a firm and sealed connection.

[0025] The mounting components include a mounting plate 24 and mounting screws 25. The mounting plate 24 is located on the top of the mounting frame 20. Two mounting screws 25 are fixedly connected to the bottom of the mounting plate 24. The mounting frame 20 has a second mounting hole 23 that mates with the mounting screws 25. One end of the inner expansion rod 6 is fixedly connected to a fixing side block 21. The fixing side block 21 has two first mounting holes 22 that mate with the mounting screws 25. The mounting frame 20 has a second fixing nut 4 that mates with the mounting screws 25. The mounting screws 25 at the bottom of the mounting plate 24 pass through the second mounting holes 23 and the first mounting holes 22. The fixing nut 4 is threaded onto the outside of the mounting screws 25 to stably install the fixing side block 21 inside the mounting frame 20.

[0026] The inner expansion rod 6 is fixedly connected to four limiting plates 7 at equal intervals on its outer side, and the outer side of the fixed support 2 is slidably connected to an impact side seat 3. One side of the impact side seat 3 is fixedly connected to the fixed support 2. The inner sides of the fixed support 2 and the impact side seat 3 are provided with four limiting installation grooves 5 that cooperate with the limiting plates 7 at equal intervals. The limiting plates 7 on the outer side of the inner expansion rod 6 limit the movement between the limiting plates 7 and the limiting installation grooves 5 on the inner sides of the fixed support 2 and the impact side seat 3, so as to facilitate the installation and positioning between the fixed side block 21 at one end of the inner expansion rod 6 and the mounting frame 20.

[0027] The inner expansion rod 6 has multiple fixing screws 14 fixedly connected at equal intervals at one end, and the inner expansion head 9 has a first mounting side block 8 fixedly connected at one end. Multiple fixing side plates 12 are fixedly connected at equal intervals on the outer side of the first mounting side block 8. The fixing side plate 12 has mounting holes 13 that cooperate with the fixing screws 14 inside. A first fixing nut 15 that cooperates with the fixing screws 14 is provided on one side of the fixing side plate 12. The first fixing nut 15 is threaded on the outer side of the fixing screws 14, and the fixing side plate 12 is installed and fixed at one end of the inner expansion rod 6, thereby installing and fixing the first mounting side block 8 and the inner expansion head 9 at one end of the inner expansion rod 6, and allowing for the installation and replacement of the inner expansion head 9.

[0028] Among them, the No. 1 mounting side block 8 is fixedly connected to the No. 2 mounting side block 11 on one side. The inner expansion rod 6 has a mounting side groove 10 that cooperates with the No. 2 mounting side block 11 on one side of the No. 1 mounting side block 8. The No. 2 mounting side block 11 enters the mounting side groove 10 at one end of the inner expansion rod 6, which facilitates the installation and positioning of the No. 1 mounting side block 8 and the inner expansion head 9.

[0029] Among them, a limiting slide rod 19 is symmetrically fixedly connected to one side of the sliding support 18. The limiting slide rod 19 is slidably connected to the fixed support plate 16. When the output end of the hydraulic cylinder 17 drives the sliding support 18 to slide on the support base 1, the sliding support 18 drives the limiting slide rod 19 on one side to slide within the fixed support plate 16, thereby improving the stability of the movement of the sliding support 18.

[0030] Specifically, in use, the second mounting side block 11 on one side of the first mounting side block 8 enters the mounting side groove 10, the fixing screw 14 enters the mounting hole 13, and the first fixing nut 15 is threaded on the outside of the fixing screw 14. The fixing side plate 12 and the first mounting side block 8 are stably installed at one end of the inner expansion rod 6, thereby fixing the inner expansion head 9 at one end of the inner expansion rod 6. The composite pipe is sleeved on the outside of the limiting plate 7, and the metal fitting is installed on the outside of the composite pipe. The inner expansion rod 6 passes through the fixing support 2 and the impact side seat 3, and is limited by the limiting plate 7 on the outside of the inner expansion rod 6 and the limiting mounting groove 5. One end of the metal fitting is attached to the impact side seat 3, and the fixing side block 21 at one end of the inner expansion rod 6 is inserted into the mounting frame 20. Inside, the mounting screw 25 at the bottom of the mounting plate 24 is inserted into the second mounting hole 23 and the first mounting hole 22. The second fixing nut 4 is threaded on the outside of the mounting screw 25 to stably install the fixing side block 21 inside the mounting frame 20. The output end of the hydraulic cylinder 17 drives the sliding support 18 and the mounting frame 20 to move. The mounting frame 20 drives the fixing side block 21, the inner expansion rod 6 and the inner expansion head 9 to move. The inner expansion head 9 expands the inner wall of the composite pipe, making it fit tightly with the metal pipe. The hydraulic cylinder 17 moves back to pull the inner expansion rod 6 and the inner expansion head 9. The inner expansion head 9 gradually expands the composite pipe and finally slides out, making it fit tightly with the metal pipe, thus forming a firm and sealed connection.

[0031] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite pipe joint internal expansion device, characterized in that, include: Support base (1); A fixed support plate (16) is provided on top of the support base (1); Hydraulic cylinder (17) is installed on one side of fixed support plate (16); A sliding support (18) is provided at the output end of the hydraulic cylinder (17), and the sliding support (18) is slidably connected to the support base (1); Mounting frame (20) is provided on one side of sliding support (18); An inner expansion rod (6) is installed on one side of a mounting frame (20), on which a mounting assembly is provided; An inner expansion head (9) is installed at one end of an inner expansion rod (6). A fixed support (2) is slidably connected to the outer side of the inner expansion rod (6). The fixed support (2) is fixedly connected to the support base (1).

2. The composite pipe joint internal expansion device according to claim 1, characterized in that: The mounting assembly includes a mounting plate (24) and mounting screws (25). The mounting plate (24) is provided on the top of the mounting frame (20). Two mounting screws (25) are fixedly connected to the bottom of the mounting plate (24). The mounting frame (20) has a second mounting hole (23) that mates with the mounting screws (25). One end of the inner expansion rod (6) is fixedly connected to a fixing side block (21). The fixing side block (21) has two first mounting holes (22) that mate with the mounting screws (25). A second fixing nut (4) that mates with the mounting screws (25) is provided on the bottom of the mounting frame (20).

3. The composite pipe joint internal expansion device according to claim 1, characterized in that: Four limiting plates (7) are fixedly connected at equal intervals on the outer side of the inner expansion rod (6), and an impact side seat (3) is slidably connected on the outer side of the fixed support (2). One side of the impact side seat (3) is fixedly connected to the fixed support (2). Four limiting installation grooves (5) that cooperate with the limiting plates (7) are opened at equal intervals on the inner sides of both the fixed support (2) and the impact side seat (3).

4. The composite pipe joint internal expansion device according to claim 1, characterized in that: One end of the inner expansion rod (6) is fixedly connected to a plurality of fixing screws (14) at equal intervals. One end of the inner expansion head (9) is fixedly connected to a first mounting side block (8). The outer side of the first mounting side block (8) is fixedly connected to a plurality of fixing side plates (12) at equal intervals. The interior of the fixing side plate (12) is provided with mounting holes (13) that cooperate with the fixing screws (14). One side of the fixing side plate (12) is provided with a first fixing nut (15) that cooperates with the fixing screws (14).

5. The composite pipe joint internal expansion device according to claim 4, characterized in that: A second mounting side block (11) is fixedly connected to one side of the first mounting side block (8), and an mounting side groove (10) that mates with the second mounting side block (11) is provided at one end of the inner expansion rod (6).

6. The composite pipe joint internal expansion device according to claim 1, characterized in that: A limiting slide rod (19) is symmetrically fixedly connected to one side of the sliding support (18), and the limiting slide rod (19) is slidably connected to the fixed support plate (16).

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